495857913d
- SVR 参数网格仅 216 种组合（4×6×3×3），全量搜索 ~2s 完成 - 之前 n_iter=10 只抽样 4.6%，靠运气撞最优参数 - 删除 n_iter 和 random_state 参数（GridSearchCV 不需要） - 保留 RandomizedSearchCV import 供其他模型（参数空间大的）使用
1275 lines
53 KiB
Python
1275 lines
53 KiB
Python
import numpy as np
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import pandas as pd
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import joblib
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import os
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from pathlib import Path
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from typing import List, Dict, Union, Tuple, Optional
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import warnings
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warnings.filterwarnings('ignore')
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# 机器学习模型导入 - 改为回归模型
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from sklearn.base import BaseEstimator, TransformerMixin
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from sklearn.svm import SVR
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from sklearn.ensemble import RandomForestRegressor
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from sklearn.neighbors import KNeighborsRegressor
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from sklearn.linear_model import LinearRegression, Ridge, Lasso, ElasticNet
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from sklearn.model_selection import GridSearchCV, RandomizedSearchCV, cross_val_score, KFold, train_test_split
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from sklearn.metrics import mean_squared_error, mean_absolute_error, r2_score
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from sklearn.cross_decomposition import PLSRegression
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from sklearn.ensemble import GradientBoostingRegressor, AdaBoostRegressor, ExtraTreesRegressor
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from sklearn.tree import DecisionTreeRegressor
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from sklearn.neural_network import MLPRegressor
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from sklearn.pipeline import Pipeline
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from sklearn.impute import SimpleImputer
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from joblib import parallel_backend
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# 第三方模型导入
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# try:
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# import lightgbm as lgb
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# LGB_AVAILABLE = True
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# except ImportError:
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# LGB_AVAILABLE = False
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LGB_AVAILABLE = False # 注释掉lightgbm
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# try:
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# import catboost as cb
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# CB_AVAILABLE = True
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# except ImportError:
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# CB_AVAILABLE = False
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CB_AVAILABLE = False # 注释掉catboost
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# 导入预处理模块
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# 动态导入预处理模块
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import sys
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import os
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# PyInstaller 打包环境感知：EXE 模式下强制单核，防止 Windows 派生无限重启
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is_frozen_env = getattr(sys, 'frozen', False)
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safe_n_jobs = 1 if is_frozen_env else -1
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from src.preprocessing.spectral_Preprocessing import Preprocessing, get_preprocessing_transformer
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from src.core.utils.split_methods import spxy, ks
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class _SafeFiniteTransformer(BaseEstimator, TransformerMixin):
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"""Pipeline 安全网：np.nan_to_num + clip，确保无 inf/NaN 进入下游模型。
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放在 Pipeline 的 preproc 与 model 之间，无论上游（MNF/比值除法）
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产生何种极端值，SVR 等严格校验的模型都不会因 inf 拒绝输入。
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"""
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def fit(self, X, y=None):
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return self
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def transform(self, X):
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result = np.nan_to_num(np.asarray(X, dtype=np.float64),
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nan=0.0, posinf=0.0, neginf=0.0)
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result = np.clip(result, -1e15, 1e15)
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return result
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class WaterQualityModelingBatch:
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"""水质参数反演批量建模类"""
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def __init__(self, artifacts_dir: str = "models/artifacts"):
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"""
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初始化批量建模类
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Args:
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artifacts_dir: 模型保存目录
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"""
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self.artifacts_dir = Path(artifacts_dir)
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self.artifacts_dir.mkdir(parents=True, exist_ok=True)
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# 定义支持的回归模型及其参数网格
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self.model_configs = {
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'SVR': {
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'model': SVR,
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'params': {
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'C': [0.1, 1, 10, 100],
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'gamma': ['scale', 'auto', 0.001, 0.01, 0.1, 1],
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'kernel': ['rbf', 'poly', 'sigmoid'],
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'epsilon': [0.01, 0.1, 0.2]
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},
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'available': True
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},
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'RF': {
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'model': RandomForestRegressor,
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'params': {
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'n_estimators': [50, 100, 200],
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'max_depth': [None, 10, 20, 30],
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'min_samples_split': [2, 5, 10],
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'min_samples_leaf': [1, 2, 4]
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},
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'available': True
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},
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'KNN': {
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'model': KNeighborsRegressor,
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'params': {
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'n_neighbors': [3, 5, 7, 9, 11],
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'weights': ['uniform', 'distance'],
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'metric': ['euclidean', 'manhattan', 'minkowski']
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},
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'available': True
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},
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'LinearRegression': {
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'model': LinearRegression,
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'params': {
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'fit_intercept': [True, False]
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},
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'available': True
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},
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'Ridge': {
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'model': Ridge,
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'params': {
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'alpha': [0.01, 0.1, 1, 10, 100],
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'fit_intercept': [True, False]
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},
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'available': True
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},
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'Lasso': {
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'model': Lasso,
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'params': {
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'alpha': [0.01, 0.1, 1, 10, 100],
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'fit_intercept': [True, False],
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'max_iter': [1000, 2000]
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},
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'available': True
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},
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'ElasticNet': {
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'model': ElasticNet,
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'params': {
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'alpha': [0.01, 0.1, 1, 10],
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'l1_ratio': [0.1, 0.3, 0.5, 0.7, 0.9],
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'fit_intercept': [True, False],
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'max_iter': [1000, 2000]
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},
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'available': True
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},
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'XGBoost': {
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'model': None, # xgboost is removed, so set to None
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'params': {
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'n_estimators': [50, 100, 200],
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'max_depth': [3, 6, 9],
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'learning_rate': [0.01, 0.1, 0.2],
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'subsample': [0.8, 0.9, 1.0]
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},
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'available': False
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},
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'LightGBM': {
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'model': lgb.LGBMRegressor if LGB_AVAILABLE else None,
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'params': {
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'n_estimators': [50, 100, 200],
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'max_depth': [3, 6, 9],
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'learning_rate': [0.01, 0.1, 0.2],
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'num_leaves': [31, 50, 100]
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},
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'available': LGB_AVAILABLE
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},
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'CatBoost': {
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'model': cb.CatBoostRegressor if CB_AVAILABLE else None,
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'params': {
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'iterations': [50, 100, 200],
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'depth': [3, 6, 9],
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'learning_rate': [0.01, 0.1, 0.2],
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'l2_leaf_reg': [1, 3, 5]
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},
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'available': CB_AVAILABLE
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},
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'PLS': {
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'model': PLSRegression,
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'params': {
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'n_components': [2, 3, 5, 7, 10]
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},
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'available': True
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},
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'GradientBoosting': {
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'model': GradientBoostingRegressor,
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'params': {
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'n_estimators': [50, 100, 200],
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'learning_rate': [0.01, 0.1, 0.2],
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'max_depth': [3, 5, 7],
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'subsample': [0.8, 0.9, 1.0],
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'min_samples_split': [2, 5, 10],
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'min_samples_leaf': [1, 2, 4]
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},
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'available': True
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},
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'AdaBoost': {
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'model': AdaBoostRegressor,
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'params': {
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'n_estimators': [50, 100, 200],
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'learning_rate': [0.01, 0.1, 0.2],
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'loss': ['linear', 'square', 'exponential']
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},
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'available': True
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},
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'DecisionTree': {
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'model': DecisionTreeRegressor,
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'params': {
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'max_depth': [None, 5, 10, 20, 30],
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'min_samples_split': [2, 5, 10],
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'min_samples_leaf': [1, 2, 4],
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'max_features': ['auto', 'sqrt', 'log2']
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},
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'available': True
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},
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'MLP': {
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'model': MLPRegressor,
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'params': {
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'hidden_layer_sizes': [(50,), (100,), (50, 50), (100, 50)],
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'activation': ['relu', 'tanh', 'logistic'],
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'solver': ['adam', 'sgd'],
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'alpha': [0.0001, 0.001, 0.01],
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'learning_rate': ['constant', 'invscaling', 'adaptive'],
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'max_iter': [1000, 2000]
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},
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'available': True
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},
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'ExtraTrees': {
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'model': ExtraTreesRegressor,
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'params': {
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'n_estimators': [50, 100, 200],
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'max_depth': [None, 10, 20, 30],
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'min_samples_split': [2, 5, 10],
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'min_samples_leaf': [1, 2, 4],
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'max_features': ['auto', 'sqrt', 'log2']
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},
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'available': True
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}
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}
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# 预处理方法列表
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self.preprocessing_methods = [
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"None", "MMS", "SS", "CT", "SNV", "MA", "SG", "MSC", "D1", "D2", "DT", "WVAE",
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"DualStream_MNF"
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]
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# 样本划分方法列表
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self.split_methods = ["random", "spxy", "ks"]
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self.results = {}
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self.best_models = {}
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@staticmethod
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def _is_wavelength_column(col_name: str) -> bool:
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"""判断列名是否为波长值（纯数字字符串，如 '374.285004'）"""
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try:
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float(str(col_name))
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return True
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except (ValueError, TypeError):
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return False
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@staticmethod
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def _is_wqi_column(col_name: str) -> bool:
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"""判断列名是否为 WQI 水质指数列（'WQI_' 前缀）"""
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return str(col_name).startswith('WQI_')
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@staticmethod
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def _extract_train_wavelengths(columns) -> List[float]:
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"""从列名列表中提取波长值（float 列表）
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遍历列名，将所有可转为 float 的列名提取为波长列表。
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用于写入模型 metadata['train_wavelengths']，供推理端光谱重采样。
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"""
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wl_list = []
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for c in columns:
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try:
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wl_list.append(float(str(c)))
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except (ValueError, TypeError):
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pass
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return wl_list
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def _extract_feature_columns(self, data: pd.DataFrame,
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feature_start_column: Union[int, str, None] = None
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) -> Tuple[pd.DataFrame, List[int]]:
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"""从 DataFrame 中提取特征列（基于列名语义，而非位置索引）
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策略（优先级从高到低）：
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1) 如果 feature_start_column 是列名（str），定位该列并取之后的列
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2) 如果 feature_start_column 是整数，兼容旧逻辑（位置索引）
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3) 如果 feature_start_column 为 None，自动识别：
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- 保留所有纯数字列名（波长列）
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- 保留所有 WQI_ 前缀列（水质指数列）
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- 跳过坐标/元数据列
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Returns:
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X: 特征 DataFrame（保留列名）
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feature_col_indices: 特征列在原 data 中的位置索引列表
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"""
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all_cols = list(data.columns)
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if feature_start_column is not None:
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# ── 兼容旧逻辑：按列名或索引位置截取 ──
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if isinstance(feature_start_column, str):
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if feature_start_column not in data.columns:
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raise ValueError(
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f"指定的特征开始列 '{feature_start_column}' 不存在于数据中"
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)
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start_idx = data.columns.get_loc(feature_start_column)
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print(f"[特征提取] 按列名 '{feature_start_column}' 定位 → 索引 {start_idx}")
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else:
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start_idx = int(feature_start_column)
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print(f"[特征提取] 按位置索引 {start_idx} 截取")
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X = data.iloc[:, start_idx:]
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feature_indices = list(range(start_idx, len(all_cols)))
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else:
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# ── 智能识别：按列名语义过滤 ──
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# 黑名单：坐标列、元数据列（不会被误判为特征）
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_meta_patterns = {
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'x_coord', 'y_coord', 'pixel_x', 'pixel_y',
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'longitude', 'latitude', 'lon', 'lat',
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'id', 'station', 'sample_id',
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}
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feature_indices = []
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for i, col in enumerate(all_cols):
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col_lower = str(col).lower().strip()
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# 跳过元数据列
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if col_lower in _meta_patterns:
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continue
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# 保留波长列
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if self._is_wavelength_column(col):
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feature_indices.append(i)
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# 保留 WQI 列
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elif self._is_wqi_column(col):
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feature_indices.append(i)
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# 其他：跳过（可能是目标列或其他非特征列）
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if not feature_indices:
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raise ValueError(
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"智能特征提取失败：未找到任何波长列或 WQI 列。"
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f"CSV 列名: {all_cols[:10]}..."
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)
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X = data.iloc[:, feature_indices]
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print(f"[特征提取] 智能识别: {len(feature_indices)} 个特征列 "
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f"(波长列 + WQI 列)")
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print(f"[特征提取] 特征数据形状: {X.shape}")
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return X, feature_indices
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def load_data_batch(self, csv_path: str,
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feature_start_column: Union[int, str, None] = None
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) -> Tuple[pd.DataFrame, Dict[str, pd.Series]]:
|
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"""批量加载 CSV 数据，自动识别特征列与目标列
|
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改造要点（v2）：
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- 特征列按列名语义提取（波长数字 / WQI_ 前缀），不再按硬编码位置一刀切
|
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- 目标列 = 不在特征列中、且非系统保留列（ID/坐标等）的数值列
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- X 保持为 DataFrame，列名保留波长信息（供后续提取 train_wavelengths）
|
||
|
||
Args:
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csv_path: CSV 文件路径
|
||
feature_start_column: （可选）旧版兼容参数：
|
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- str: 特征起始列名
|
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- int: 特征起始列索引
|
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- None: 自动智能识别
|
||
|
||
Returns:
|
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X: 特征数据 (DataFrame，保留列名)
|
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y_dict: 目标值数据字典，键为列名
|
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"""
|
||
# 读取 CSV 数据，处理空字符串和缺失值
|
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try:
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data = pd.read_csv(csv_path, na_values=['', ' ', 'NaN', 'nan', 'NULL', 'null'])
|
||
except pd.errors.EmptyDataError:
|
||
raise ValueError(f"CSV文件 '{csv_path}' 为空或不存在")
|
||
except Exception as e:
|
||
raise ValueError(f"读取CSV文件 '{csv_path}' 时出错: {e}")
|
||
|
||
print("数据清理...")
|
||
original_shape = data.shape
|
||
|
||
# 将空字符串替换为 NaN
|
||
data = data.replace(r'^\s*$', np.nan, regex=True)
|
||
|
||
# 对于数值列，将无法转换为数字的字符串替换为 NaN
|
||
for col in data.columns:
|
||
try:
|
||
data[col] = pd.to_numeric(data[col], errors='coerce')
|
||
except Exception:
|
||
pass
|
||
|
||
cleaned_shape = data.shape
|
||
if cleaned_shape != original_shape:
|
||
print(f"数据清理完成: {original_shape[0]}行{original_shape[1]}列 "
|
||
f"-> {cleaned_shape[0]}行{cleaned_shape[1]}列")
|
||
|
||
print(f"数据加载完成，总列数: {data.shape[1]}")
|
||
print(f"所有列名: {list(data.columns)[:10]}..." if len(data.columns) > 10
|
||
else f"所有列名: {list(data.columns)}")
|
||
|
||
# ── 提取特征列（基于列名语义） ──
|
||
X, feature_indices = self._extract_feature_columns(
|
||
data, feature_start_column
|
||
)
|
||
|
||
# ── 提取目标列（不在特征列中 + 非系统保留列 + 数值类型） ──
|
||
feature_idx_set = set(feature_indices)
|
||
ignore_cols = {
|
||
'ID', 'id', 'Id',
|
||
'Longitude', 'Latitude', 'Lon', 'Lat',
|
||
'longitude', 'latitude', 'lon', 'lat',
|
||
'Station', 'station', 'sample_id',
|
||
'x_coord', 'y_coord', 'pixel_x', 'pixel_y',
|
||
}
|
||
|
||
y_dict = {}
|
||
for i, col_name in enumerate(data.columns):
|
||
if i in feature_idx_set:
|
||
continue # 已在特征矩阵中
|
||
col_str = str(col_name).strip()
|
||
if col_str in ignore_cols:
|
||
print(f" 跳过 '{col_name}': 系统保留列")
|
||
continue
|
||
|
||
y_series = data[col_name]
|
||
if not pd.api.types.is_numeric_dtype(y_series):
|
||
print(f" 跳过 '{col_name}': 非数值类型")
|
||
continue
|
||
if y_series.isna().all():
|
||
print(f" 跳过 '{col_name}': 所有值为空")
|
||
continue
|
||
|
||
y_dict[col_name] = y_series
|
||
print(f" 目标列 '{col_name}': {y_series.count()} 个非空值, "
|
||
f"范围: {y_series.min():.4f} ~ {y_series.max():.4f}")
|
||
|
||
print(f"特征数据形状: {X.shape}")
|
||
print(f"有效目标列数量: {len(y_dict)}")
|
||
|
||
return X, y_dict
|
||
|
||
def load_data_single(self, csv_path: str, target_column_name: str,
|
||
feature_start_column: Union[int, str, None] = None
|
||
) -> Tuple[pd.DataFrame, pd.Series]:
|
||
"""
|
||
加载单个目标列的CSV数据（v2：基于列名语义提取特征）
|
||
|
||
Args:
|
||
csv_path: CSV文件路径
|
||
target_column_name: 目标列名
|
||
feature_start_column: 特征起始位置（可选，None=智能识别）
|
||
|
||
Returns:
|
||
X: 特征数据 (DataFrame，保留列名)
|
||
y: 目标值数据
|
||
"""
|
||
data = pd.read_csv(csv_path)
|
||
|
||
# 检查目标列是否存在
|
||
if target_column_name not in data.columns:
|
||
raise ValueError(f"目标列 '{target_column_name}' 不存在于数据中")
|
||
|
||
# 提取目标值
|
||
y = data[target_column_name]
|
||
|
||
# 去除 y 值为空的行
|
||
mask = ~y.isna()
|
||
data_cleaned = data[mask]
|
||
y = data_cleaned[target_column_name]
|
||
|
||
# 提取特征（基于列名语义，排除目标列自身）
|
||
X, _ = self._extract_feature_columns(
|
||
data_cleaned, feature_start_column
|
||
)
|
||
# 确保目标列不在 X 中
|
||
if target_column_name in X.columns:
|
||
X = X.drop(columns=[target_column_name])
|
||
|
||
print(f"目标列 '{target_column_name}' 数据加载完成:")
|
||
print(f" 样本数量: {X.shape[0]}")
|
||
print(f" 特征数量: {X.shape[1]}")
|
||
print(f" 目标值范围: {y.min():.4f} ~ {y.max():.4f}")
|
||
print(f" 目标值均值: {y.mean():.4f}")
|
||
|
||
return X, y
|
||
|
||
def preprocess_data(self, X: pd.DataFrame, method: str) -> np.ndarray:
|
||
"""
|
||
数据预处理
|
||
|
||
Args:
|
||
X: 原始特征数据
|
||
method: 预处理方法
|
||
|
||
Returns:
|
||
预处理后的数据
|
||
"""
|
||
print(f"应用预处理方法: {method}")
|
||
|
||
# 如果方法为None，直接返回原始数据
|
||
if method == "None" or method is None:
|
||
print("跳过预处理，使用原始数据")
|
||
return X.values
|
||
|
||
try:
|
||
X_processed = Preprocessing(method, X)
|
||
|
||
# 确保返回的是numpy数组
|
||
if isinstance(X_processed, pd.DataFrame):
|
||
X_processed = X_processed.values
|
||
|
||
print(f"预处理完成，数据形状: {X_processed.shape}")
|
||
return X_processed
|
||
|
||
except Exception as e:
|
||
print(f"预处理失败: {e}")
|
||
print("使用原始数据")
|
||
return X.values
|
||
|
||
def random(self, data, label, test_ratio=0.2, random_state=123):
|
||
"""
|
||
随机划分数据集
|
||
|
||
Args:
|
||
data: shape (n_samples, n_features)
|
||
label: shape (n_sample, )
|
||
test_ratio: 测试集比例，默认: 0.2
|
||
random_state: 随机种子，默认: 123
|
||
|
||
Returns:
|
||
X_train: (n_samples, n_features)
|
||
X_test: (n_samples, n_features)
|
||
y_train: (n_sample, )
|
||
y_test: (n_sample, )
|
||
"""
|
||
X_train, X_test, y_train, y_test = train_test_split(
|
||
data, label, test_size=test_ratio, random_state=random_state
|
||
)
|
||
return X_train, X_test, y_train, y_test
|
||
|
||
def spxy(self, data, label, test_size=0.2):
|
||
"""SPXY算法划分数据集（委托至 src.core.utils.split_methods.spxy）"""
|
||
return spxy(data, label, test_size=test_size)
|
||
|
||
def ks(self, data, label, test_size=0.2):
|
||
"""Kennard-Stone算法划分数据集（委托至 src.core.utils.split_methods.ks）"""
|
||
return ks(data, label, test_size=test_size)
|
||
|
||
def split_data(self, X: np.ndarray, y: pd.Series, method: str = "random",
|
||
test_size: float = 0.2, random_state: int = 42) -> Tuple[np.ndarray, np.ndarray, np.ndarray, np.ndarray]:
|
||
"""
|
||
根据指定方法划分数据集
|
||
|
||
Args:
|
||
X: 特征数据
|
||
y: 目标值数据
|
||
method: 划分方法 ("random", "spxy", "ks")
|
||
test_size: 测试集比例
|
||
random_state: 随机种子（仅对random方法有效）
|
||
|
||
Returns:
|
||
X_train, X_test, y_train, y_test
|
||
"""
|
||
print(f"使用 {method} 方法划分数据集")
|
||
|
||
if method == "random":
|
||
return self.random(X, y, test_ratio=test_size, random_state=random_state)
|
||
elif method == "spxy":
|
||
return self.spxy(X, y, test_size=test_size)
|
||
elif method == "ks":
|
||
return self.ks(X, y, test_size=test_size)
|
||
else:
|
||
raise ValueError(f"不支持的划分方法: {method}. 支持的方法: {self.split_methods}")
|
||
|
||
def train_single_model(self, X_raw: pd.DataFrame, y: pd.Series, model_name: str,
|
||
cv_folds: int = 5, scoring: str = 'neg_mean_squared_error',
|
||
test_size: float = 0.2, random_state: int = 42,
|
||
split_method: str = "random",
|
||
preprocess_method: str = "None") -> Dict:
|
||
"""
|
||
训练单个回归模型（Pipeline 化：preprocess_method 字符串内部构造 Pipeline，
|
||
scaler/MSC.mean_spectrum_ 等状态被绑定在 best_model 上，CV 与 test 评估
|
||
都在「只拟合训练 fold 的 scaler」之上，避免传统「X_full → scaler.fit →
|
||
split → CV」造成的数据泄露）。
|
||
|
||
Args:
|
||
X_raw: 原始特征数据（未经预处理，DataFrame 形态方便 Pipeline 内部转换）
|
||
y: 目标值数据
|
||
model_name: 模型名称
|
||
preprocess_method: 预处理方法字符串（如 'None' / 'SS' / 'MSC'）；
|
||
训练结束后 best_model 字段即为 sklearn Pipeline。
|
||
其余参数（cv_folds / scoring / test_size / random_state / split_method）
|
||
含义保持不变。
|
||
|
||
Returns:
|
||
训练结果字典；'model' 字段现在是 sklearn.pipeline.Pipeline（含 scaler）
|
||
"""
|
||
if model_name not in self.model_configs:
|
||
raise ValueError(f"不支持的模型: {model_name}")
|
||
|
||
config = self.model_configs[model_name]
|
||
|
||
if not config['available']:
|
||
print(f"模型 {model_name} 不可用，请安装相应的库")
|
||
return None
|
||
|
||
print(f"开始训练模型: {model_name} (预处理: {preprocess_method})")
|
||
|
||
# 使用指定方法分割训练集和测试集（用原始 X_raw，Pipeline 内置 transform 处理）
|
||
X_train, X_test, y_train, y_test = self.split_data(
|
||
X_raw, y, method=split_method, test_size=test_size, random_state=random_state
|
||
)
|
||
|
||
print(f"数据分割完成:")
|
||
print(f" 训练集样本数: {X_train.shape[0]}")
|
||
print(f" 测试集样本数: {X_test.shape[0]}")
|
||
|
||
# 构造 base_model
|
||
if callable(config['model']):
|
||
base_model = config['model']()
|
||
else:
|
||
base_model = config['model']
|
||
|
||
# 特殊处理某些模型
|
||
if model_name == 'CatBoost':
|
||
base_model.set_params(verbose=False)
|
||
elif model_name == 'LightGBM':
|
||
base_model.set_params(verbose=-1)
|
||
|
||
# ============ 关键：把预处理器塞进 Pipeline ============
|
||
# DualStream_MNF 需要传入波长列表，供 PhysicalFeatureExtractor 定位波段
|
||
_wl_list = None
|
||
if preprocess_method == "DualStream_MNF":
|
||
_wl_list = self._extract_train_wavelengths(X_raw.columns)
|
||
preproc = get_preprocessing_transformer(preprocess_method, wavelengths=_wl_list)
|
||
pipeline = Pipeline([
|
||
('imputer', SimpleImputer(strategy='median')),
|
||
('preproc', preproc),
|
||
('cleaner', _SafeFiniteTransformer()),
|
||
('model', base_model),
|
||
])
|
||
|
||
# ★ 入口清洗：inf → NaN，后续 SimpleImputer/cleaner 接力处理
|
||
X_train = np.asarray(X_train, dtype=np.float64)
|
||
X_test = np.asarray(X_test, dtype=np.float64)
|
||
X_train[~np.isfinite(X_train)] = np.nan
|
||
X_test[~np.isfinite(X_test)] = np.nan
|
||
|
||
# 以「步骤名__参数名」的格式索引参数网格；
|
||
# config['params'] 是模型层的（无 __），统一加 model__ 前缀。
|
||
prefixed_params = {
|
||
f"model__{k}": v for k, v in config['params'].items()
|
||
}
|
||
|
||
# 全量网格搜索：SVR 超参组合仅 216 种（4×6×3×3），
|
||
# 穷举远优于 RandomizedSearchCV(n_iter=10) 的随机抽样
|
||
cv_strategy = KFold(n_splits=cv_folds, shuffle=True, random_state=random_state)
|
||
|
||
grid_search = GridSearchCV(
|
||
pipeline,
|
||
prefixed_params,
|
||
cv=cv_strategy,
|
||
scoring=scoring,
|
||
n_jobs=safe_n_jobs,
|
||
verbose=1,
|
||
)
|
||
|
||
grid_search.fit(X_train, y_train)
|
||
|
||
# 获取最佳模型（已是 Pipeline）
|
||
best_model = grid_search.best_estimator_
|
||
|
||
# 交叉验证评估（在训练集上）：cross_val_score 会对 Pipeline 重 clone，
|
||
# 保证每个 fold 重 fit 预处理，CV 评分反映「无泄露」真实泛化能力
|
||
cv_scores = cross_val_score(best_model, X_train, y_train, cv=cv_strategy,
|
||
scoring=scoring, n_jobs=safe_n_jobs)
|
||
|
||
# 计算训练集上的回归指标（Pipeline 内 fit_transform 只发生一次，已 fit 完毕）
|
||
y_train_pred = best_model.predict(X_train)
|
||
train_mse = mean_squared_error(y_train, y_train_pred)
|
||
train_mae = mean_absolute_error(y_train, y_train_pred)
|
||
train_r2 = r2_score(y_train, y_train_pred)
|
||
train_rmse = np.sqrt(train_mse)
|
||
|
||
# 计算测试集上的回归指标（用训练集 fit 出的 scaler，正确的 deploy-time 行为）
|
||
y_test_pred = best_model.predict(X_test)
|
||
test_mse = mean_squared_error(y_test, y_test_pred)
|
||
test_mae = mean_absolute_error(y_test, y_test_pred)
|
||
test_r2 = r2_score(y_test, y_test_pred)
|
||
test_rmse = np.sqrt(test_mse)
|
||
|
||
result = {
|
||
'model': best_model,
|
||
'best_params': grid_search.best_params_,
|
||
'best_score': grid_search.best_score_,
|
||
'cv_mean': cv_scores.mean(),
|
||
'cv_std': cv_scores.std(),
|
||
'cv_scores': cv_scores,
|
||
# 训练集指标
|
||
'train_mse': train_mse,
|
||
'train_mae': train_mae,
|
||
'train_rmse': train_rmse,
|
||
'train_r2': train_r2,
|
||
# 测试集指标
|
||
'test_mse': test_mse,
|
||
'test_mae': test_mae,
|
||
'test_rmse': test_rmse,
|
||
'test_r2': test_r2,
|
||
# 数据分割信息
|
||
'train_size': X_train.shape[0],
|
||
'test_size': X_test.shape[0],
|
||
'split_method': split_method,
|
||
# Pipeline 信息（用于诊断 / metadata）
|
||
'preprocess_method': preprocess_method,
|
||
'is_pipeline': isinstance(best_model, Pipeline),
|
||
}
|
||
|
||
print(f"模型 {model_name} 训练完成:")
|
||
print(f" 最佳参数: {result['best_params']}")
|
||
print(f" 最佳得分: {result['best_score']:.4f}")
|
||
print(f" CV均值: {result['cv_mean']:.4f} ± {result['cv_std']:.4f}")
|
||
print(f" 训练集指标:")
|
||
print(f" R²: {result['train_r2']:.4f}")
|
||
print(f" RMSE: {result['train_rmse']:.4f}")
|
||
print(f" MAE: {result['train_mae']:.4f}")
|
||
print(f" 测试集指标:")
|
||
print(f" R²: {result['test_r2']:.4f}")
|
||
print(f" RMSE: {result['test_rmse']:.4f}")
|
||
print(f" MAE: {result['test_mae']:.4f}")
|
||
|
||
return result
|
||
|
||
def save_model(self, model, target_column_name: str, preprocess_method: str, model_name: str,
|
||
metadata: Dict = None):
|
||
"""
|
||
保存模型，使用目标列名作为文件名的一部分
|
||
|
||
Args:
|
||
model: 训练好的模型
|
||
target_column_name: 目标列名
|
||
preprocess_method: 预处理方法名称
|
||
model_name: 模型名称
|
||
metadata: 模型元数据
|
||
"""
|
||
# 清理目标列名，移除可能的特殊字符
|
||
safe_target_name = "".join(c for c in target_column_name if c.isalnum() or c in ('-', '_')).rstrip()
|
||
|
||
filename = f"{safe_target_name}_{preprocess_method}_{model_name}.joblib"
|
||
filepath = self.artifacts_dir / filename
|
||
|
||
# 保存模型和元数据
|
||
save_data = {
|
||
'model': model,
|
||
'target_column_name': target_column_name,
|
||
'preprocess_method': preprocess_method,
|
||
'model_name': model_name,
|
||
'metadata': metadata or {}
|
||
}
|
||
|
||
joblib.dump(save_data, filepath)
|
||
print(f"模型已保存: {filepath}")
|
||
|
||
# ═══════════════════════════════════════════════════════════
|
||
# ★ C++/Rust 部署导出：提取 MNF + SVR 纯量矩阵
|
||
# ═══════════════════════════════════════════════════════════
|
||
if not isinstance(model, Pipeline):
|
||
return
|
||
|
||
_mnf = self._find_mnf_in_pipeline(model)
|
||
_svr = self._find_svr_in_pipeline(model)
|
||
_phys = self._find_physical_extractor_in_pipeline(model)
|
||
|
||
if _mnf is not None and _svr is not None:
|
||
_deploy = {
|
||
'mnf_mean': np.asarray(_mnf.mean_).ravel(),
|
||
'mnf_W': np.asarray(_mnf.W_mnf_),
|
||
'mnf_n_components': int(_mnf.n_components),
|
||
}
|
||
# SVR 部署矩阵（rbf kernel 需要 support_vectors_）
|
||
_deploy['svr_dual_coef'] = np.asarray(_svr.dual_coef_)
|
||
_deploy['svr_intercept'] = np.asarray(_svr.intercept_)
|
||
if hasattr(_svr, 'support_vectors_'):
|
||
_deploy['svr_support_vectors'] = np.asarray(_svr.support_vectors_)
|
||
_deploy['svr_gamma'] = float(getattr(_svr, '_gamma', 1.0))
|
||
# kernel type for C++ dispatch
|
||
_kernel = str(getattr(_svr, 'kernel', 'rbf')).lower()
|
||
_deploy['svr_kernel'] = _kernel
|
||
if _kernel == 'poly':
|
||
_deploy['svr_degree'] = int(getattr(_svr, 'degree', 3))
|
||
_deploy['svr_coef0'] = float(getattr(_svr, 'coef0', 0.0))
|
||
|
||
# 物理特征索引（C++ 端据此定位波段列）
|
||
if _phys is not None:
|
||
_deploy['physical_wavelengths'] = np.asarray(
|
||
_phys.wavelengths, dtype=np.float64
|
||
)
|
||
_feat_map = {}
|
||
for name, ia, ib in _phys._feat_cols_:
|
||
_feat_map[name] = {
|
||
'wl_a': float(_phys.wavelengths[ia]),
|
||
'wl_b': float(_phys.wavelengths[ib]),
|
||
'idx_a': int(ia),
|
||
'idx_b': int(ib),
|
||
}
|
||
_deploy['physical_feature_map'] = _feat_map
|
||
|
||
npz_path = str(filepath).replace('.joblib', '_deploy.npz')
|
||
np.savez_compressed(npz_path, **_deploy)
|
||
print(f"[部署导出] MNF+SVR 纯量矩阵已保存: {npz_path}")
|
||
elif _mnf is None and _svr is not None:
|
||
print("[部署导出] 仅检测到 SVR 未检测到 MNFTransformer，跳过 .npz 导出")
|
||
|
||
# ═══════════════════════════════════════════════════════════
|
||
# 部署矩阵提取辅助方法：从 Pipeline 中定位特定 Transformer
|
||
# ═══════════════════════════════════════════════════════════
|
||
|
||
@staticmethod
|
||
def _find_transformer_in_pipeline(pipeline, target_class_name):
|
||
"""在 Pipeline 的 'preproc' 步骤中递归查找指定类型的 Transformer。
|
||
|
||
支持 FeatureUnion 嵌套：若 preproc 是 FeatureUnion，
|
||
则遍历其 transformer_list 逐个子变压器查找。
|
||
"""
|
||
from sklearn.pipeline import FeatureUnion
|
||
preproc = pipeline.named_steps.get('preproc')
|
||
if preproc is None:
|
||
return None
|
||
if isinstance(preproc, FeatureUnion):
|
||
for name, trans in preproc.transformer_list:
|
||
found = WaterQualityModelingBatch._find_transformer_in_step(
|
||
trans, target_class_name)
|
||
if found is not None:
|
||
return found
|
||
return None
|
||
return WaterQualityModelingBatch._find_transformer_in_step(
|
||
preproc, target_class_name)
|
||
|
||
@staticmethod
|
||
def _find_transformer_in_step(step, target_class_name):
|
||
"""在单个 Pipeline 步骤（可能是 Pipeline 自身）中查找 Transformer。"""
|
||
if step.__class__.__name__ == target_class_name:
|
||
return step
|
||
# 处理 Pipeline 嵌套
|
||
if hasattr(step, 'named_steps'):
|
||
for sub_name, sub_step in step.named_steps.items():
|
||
found = WaterQualityModelingBatch._find_transformer_in_step(
|
||
sub_step, target_class_name)
|
||
if found is not None:
|
||
return found
|
||
return None
|
||
|
||
@staticmethod
|
||
def _find_mnf_in_pipeline(pipeline):
|
||
return WaterQualityModelingBatch._find_transformer_in_pipeline(
|
||
pipeline, 'MNFTransformer')
|
||
|
||
@staticmethod
|
||
def _find_svr_in_pipeline(pipeline):
|
||
model_step = pipeline.named_steps.get('model')
|
||
if model_step is not None and model_step.__class__.__name__ == 'SVR':
|
||
return model_step
|
||
return None
|
||
|
||
@staticmethod
|
||
def _find_physical_extractor_in_pipeline(pipeline):
|
||
return WaterQualityModelingBatch._find_transformer_in_pipeline(
|
||
pipeline, 'PhysicalFeatureExtractor')
|
||
|
||
def train_models_batch(self, csv_path: str, feature_start_column: Union[int, str],
|
||
preprocessing_methods: Union[str, List[str]] = "None",
|
||
model_names: Union[str, List[str]] = "RF",
|
||
split_methods: Union[str, List[str]] = "random",
|
||
cv_folds: int = 5,
|
||
scoring: str = 'neg_mean_squared_error',
|
||
test_size: float = 0.2,
|
||
random_state: int = 42) -> Dict:
|
||
"""
|
||
批量训练多个目标列的模型
|
||
|
||
Args:
|
||
csv_path: 数据文件路径
|
||
feature_start_column: 特征开始列索引（int）或列名（str）
|
||
preprocessing_methods: 预处理方法列表
|
||
model_names: 模型名称列表
|
||
split_methods: 数据划分方法列表
|
||
cv_folds: 交叉验证折数
|
||
scoring: 评分指标（回归指标）
|
||
test_size: 测试集比例
|
||
random_state: 随机种子
|
||
|
||
Returns:
|
||
所有模型的训练结果
|
||
"""
|
||
# 转换为列表
|
||
if isinstance(preprocessing_methods, str):
|
||
preprocessing_methods = [preprocessing_methods]
|
||
if isinstance(model_names, str):
|
||
model_names = [model_names]
|
||
if isinstance(split_methods, str):
|
||
split_methods = [split_methods]
|
||
|
||
# 加载数据
|
||
X_raw, y_dict = self.load_data_batch(csv_path, feature_start_column)
|
||
|
||
all_results = {}
|
||
|
||
# 对每个目标列进行训练
|
||
for target_column_name, y in y_dict.items():
|
||
print(f"\n{'='*80}")
|
||
print(f"开始训练目标列: {target_column_name}")
|
||
print(f"{'='*80}")
|
||
|
||
# 创建该目标列的子目录
|
||
target_artifacts_dir = self.artifacts_dir / target_column_name
|
||
target_artifacts_dir.mkdir(parents=True, exist_ok=True)
|
||
|
||
# 临时更改artifacts_dir
|
||
original_artifacts_dir = self.artifacts_dir
|
||
self.artifacts_dir = target_artifacts_dir
|
||
|
||
try:
|
||
# 去除该目标列的空值
|
||
mask = ~y.isna()
|
||
if mask.sum() == 0:
|
||
print(f"目标列 '{target_column_name}' 无有效数据，跳过")
|
||
continue
|
||
|
||
X_clean = X_raw[mask]
|
||
y_clean = y[mask]
|
||
|
||
print(f"有效样本数: {len(y_clean)}")
|
||
|
||
# 训练该目标列的所有模型组合
|
||
target_results = self.train_models_single_target(
|
||
X_clean, y_clean, target_column_name,
|
||
preprocessing_methods, model_names, split_methods,
|
||
cv_folds, scoring, test_size, random_state
|
||
)
|
||
|
||
all_results[target_column_name] = target_results
|
||
|
||
except Exception as e:
|
||
print(f"训练目标列 '{target_column_name}' 时出错: {e}")
|
||
continue
|
||
finally:
|
||
# 恢复原始artifacts_dir
|
||
self.artifacts_dir = original_artifacts_dir
|
||
|
||
# 保存所有结果的汇总
|
||
self._save_batch_results_summary(all_results)
|
||
|
||
return all_results
|
||
|
||
def train_models_single_target(self, X_raw: pd.DataFrame, y: pd.Series, target_column_name: str,
|
||
preprocessing_methods: List[str], model_names: List[str],
|
||
split_methods: List[str], cv_folds: int, scoring: str,
|
||
test_size: float, random_state: int) -> Dict:
|
||
"""
|
||
训练单个目标列的所有模型组合
|
||
"""
|
||
results = {}
|
||
|
||
# 遍历所有组合
|
||
for split_method in split_methods:
|
||
for preprocess_method in preprocessing_methods:
|
||
for model_name in model_names:
|
||
combo_key = f"{split_method}_{preprocess_method}_{model_name}"
|
||
print(f"\n{'-' * 60}")
|
||
print(f"训练组合: {combo_key}")
|
||
print(f"{'-' * 60}")
|
||
|
||
try:
|
||
# 不再外部 Preprocessing——改传给 train_single_model 由 Pipeline 处理
|
||
result = self.train_single_model(
|
||
X_raw, y, model_name,
|
||
cv_folds, scoring, test_size, random_state, split_method,
|
||
preprocess_method=preprocess_method,
|
||
)
|
||
|
||
if result is not None:
|
||
# 提取训练波长列表（写入 metadata，供推理端光谱重采样）
|
||
train_wavelengths = self._extract_train_wavelengths(
|
||
X_raw.columns
|
||
)
|
||
print(f"[波长记忆] 提取到 {len(train_wavelengths)} 个训练波长: "
|
||
f"{train_wavelengths[0]:.2f} ~ {train_wavelengths[-1]:.2f} nm")
|
||
|
||
# 保存模型（result['model'] 已是 sklearn Pipeline）
|
||
metadata = {
|
||
'target_column_name': target_column_name,
|
||
'cv_mean': result['cv_mean'],
|
||
'cv_std': result['cv_std'],
|
||
'best_params': result['best_params'],
|
||
'data_shape': X_raw.shape,
|
||
'target_range': [float(y.min()), float(y.max())],
|
||
'train_r2': result['train_r2'],
|
||
'train_rmse': result['train_rmse'],
|
||
'train_mae': result['train_mae'],
|
||
'test_r2': result['test_r2'],
|
||
'test_rmse': result['test_rmse'],
|
||
'test_mae': result['test_mae'],
|
||
'train_size': result['train_size'],
|
||
'test_size': result['test_size'],
|
||
'split_method': result['split_method'],
|
||
'preprocess_method': preprocess_method,
|
||
'is_pipeline': result.get('is_pipeline', False),
|
||
# ★ 波长记忆：推理端可据此进行跨传感器光谱重采样
|
||
'train_wavelengths': train_wavelengths,
|
||
'train_columns': list(X_raw.columns),
|
||
}
|
||
|
||
self.save_model(result['model'], target_column_name,
|
||
f"{split_method}_{preprocess_method}",
|
||
model_name, metadata)
|
||
|
||
results[combo_key] = result
|
||
|
||
except Exception as e:
|
||
print(f"训练组合 {combo_key} 失败: {e}")
|
||
continue
|
||
|
||
# 保存该目标列的结果摘要
|
||
self._save_single_target_results_summary(target_column_name, results)
|
||
|
||
return results
|
||
|
||
def _save_single_target_results_summary(self, target_column_name: str, results: Dict):
|
||
"""保存单个目标列的结果摘要"""
|
||
if not results:
|
||
print(f"目标列 '{target_column_name}' 没有训练结果")
|
||
return
|
||
|
||
summary_data = []
|
||
|
||
for combo_key, result in results.items():
|
||
# 分离划分方法、预处理方法和建模方法
|
||
parts = combo_key.split('_', 2)
|
||
split_method = parts[0] if len(parts) > 0 else ''
|
||
preprocess_method = parts[1] if len(parts) > 1 else ''
|
||
model_method = parts[2] if len(parts) > 2 else ''
|
||
|
||
summary_data.append({
|
||
'划分方法': split_method,
|
||
'预处理方法': preprocess_method,
|
||
'建模方法': model_method,
|
||
'CV均值': result['cv_mean'],
|
||
'CV标准差': result['cv_std'],
|
||
'最佳得分': result['best_score'],
|
||
'训练集R²': result['train_r2'],
|
||
'训练集RMSE': result['train_rmse'],
|
||
'训练集MAE': result['train_mae'],
|
||
'训练集MSE': result['train_mse'],
|
||
'测试集R²': result['test_r2'],
|
||
'测试集RMSE': result['test_rmse'],
|
||
'测试集MAE': result['test_mae'],
|
||
'测试集MSE': result['test_mse'],
|
||
'训练样本数': result['train_size'],
|
||
'测试样本数': result['test_size'],
|
||
'最佳参数': str(result['best_params'])
|
||
})
|
||
|
||
summary_df = pd.DataFrame(summary_data)
|
||
# 按测试集R²降序排列（R²越大越好）
|
||
summary_df = summary_df.sort_values('测试集R²', ascending=False)
|
||
|
||
# 清理目标列名，移除可能的特殊字符
|
||
safe_target_name = "".join(c for c in target_column_name if c.isalnum() or c in ('-', '_')).rstrip()
|
||
|
||
# 保存详细结果CSV（中文版）
|
||
detailed_path = self.artifacts_dir / f"{safe_target_name}_detailed_results.csv"
|
||
summary_df.to_csv(detailed_path, index=False, encoding='utf-8-sig')
|
||
|
||
# 保存简化版本用于兼容性（英文版）
|
||
summary_data_simple = []
|
||
for combo_key, result in results.items():
|
||
summary_data_simple.append({
|
||
'combination': combo_key,
|
||
'cv_mean': result['cv_mean'],
|
||
'cv_std': result['cv_std'],
|
||
'best_score': result['best_score'],
|
||
'train_r2': result['train_r2'],
|
||
'train_rmse': result['train_rmse'],
|
||
'train_mae': result['train_mae'],
|
||
'test_r2': result['test_r2'],
|
||
'test_rmse': result['test_rmse'],
|
||
'test_mae': result['test_mae'],
|
||
'train_size': result['train_size'],
|
||
'test_size': result['test_size'],
|
||
'split_method': result.get('split_method', 'unknown'),
|
||
'best_params': str(result['best_params'])
|
||
})
|
||
|
||
summary_df_simple = pd.DataFrame(summary_data_simple)
|
||
summary_df_simple = summary_df_simple.sort_values('test_r2', ascending=False)
|
||
simple_summary_path = self.artifacts_dir / f"{safe_target_name}_training_summary.csv"
|
||
summary_df_simple.to_csv(simple_summary_path, index=False)
|
||
|
||
print(f"\n{'-' * 60}")
|
||
print(f"目标列 '{target_column_name}' 训练结果摘要:")
|
||
print(f"{'-' * 60}")
|
||
print(summary_df[
|
||
['划分方法', '预处理方法', '建模方法', '训练集R²', '测试集R²', '训练集RMSE', '测试集RMSE', 'CV均值']].to_string(
|
||
index=False))
|
||
print(f"\n详细结果已保存: {detailed_path}")
|
||
print(f"简化结果已保存: {simple_summary_path}")
|
||
|
||
def _save_batch_results_summary(self, all_results: Dict):
|
||
"""保存批量训练结果汇总"""
|
||
all_summary_data = []
|
||
|
||
for target_column_name, target_results in all_results.items():
|
||
for combo_key, result in target_results.items():
|
||
# 分离划分方法、预处理方法和建模方法
|
||
parts = combo_key.split('_', 2)
|
||
split_method = parts[0] if len(parts) > 0 else ''
|
||
preprocess_method = parts[1] if len(parts) > 1 else ''
|
||
model_method = parts[2] if len(parts) > 2 else ''
|
||
|
||
all_summary_data.append({
|
||
'目标列': target_column_name,
|
||
'划分方法': split_method,
|
||
'预处理方法': preprocess_method,
|
||
'建模方法': model_method,
|
||
'CV均值': result['cv_mean'],
|
||
'CV标准差': result['cv_std'],
|
||
'最佳得分': result['best_score'],
|
||
'训练集R²': result['train_r2'],
|
||
'训练集RMSE': result['train_rmse'],
|
||
'训练集MAE': result['train_mae'],
|
||
'训练集MSE': result['train_mse'],
|
||
'测试集R²': result['test_r2'],
|
||
'测试集RMSE': result['test_rmse'],
|
||
'测试集MAE': result['test_mae'],
|
||
'测试集MSE': result['test_mse'],
|
||
'训练样本数': result['train_size'],
|
||
'测试样本数': result['test_size'],
|
||
'最佳参数': str(result['best_params'])
|
||
})
|
||
|
||
if all_summary_data:
|
||
summary_df = pd.DataFrame(all_summary_data)
|
||
# 按目标列和测试集R²排序
|
||
summary_df = summary_df.sort_values(['目标列', '测试集R²'], ascending=[True, False])
|
||
|
||
# 保存详细结果CSV（中文版）
|
||
detailed_path = self.artifacts_dir / "batch_detailed_results.csv"
|
||
summary_df.to_csv(detailed_path, index=False, encoding='utf-8-sig')
|
||
|
||
# 保持原有的批量训练汇总结果（中文版）
|
||
batch_summary_path = self.artifacts_dir / "batch_training_summary.csv"
|
||
summary_df.to_csv(batch_summary_path, index=False, encoding='utf-8-sig')
|
||
|
||
# 创建简化版本用于兼容性（英文版）
|
||
all_summary_data_simple = []
|
||
for target_column_name, target_results in all_results.items():
|
||
for combo_key, result in target_results.items():
|
||
all_summary_data_simple.append({
|
||
'target_column': target_column_name,
|
||
'combination': combo_key,
|
||
'cv_mean': result['cv_mean'],
|
||
'cv_std': result['cv_std'],
|
||
'best_score': result['best_score'],
|
||
'train_r2': result['train_r2'],
|
||
'train_rmse': result['train_rmse'],
|
||
'train_mae': result['train_mae'],
|
||
'test_r2': result['test_r2'],
|
||
'test_rmse': result['test_rmse'],
|
||
'test_mae': result['test_mae'],
|
||
'train_size': result['train_size'],
|
||
'test_size': result['test_size'],
|
||
'split_method': result.get('split_method', 'unknown'),
|
||
'best_params': str(result['best_params'])
|
||
})
|
||
|
||
summary_df_simple = pd.DataFrame(all_summary_data_simple)
|
||
summary_df_simple = summary_df_simple.sort_values(['target_column', 'test_r2'], ascending=[True, False])
|
||
simple_summary_path = self.artifacts_dir / "batch_training_summary_simple.csv"
|
||
summary_df_simple.to_csv(simple_summary_path, index=False)
|
||
|
||
print(f"\n{'='*80}")
|
||
print("批量训练结果汇总:")
|
||
print(f"{'='*80}")
|
||
|
||
# 显示每个目标列的最佳模型
|
||
for target_col in summary_df['目标列'].unique():
|
||
target_data = summary_df[summary_df['目标列'] == target_col]
|
||
best_row = target_data.iloc[0] # 已经按R²降序排列
|
||
print(f"\n目标列 '{target_col}' 最佳模型:")
|
||
print(f" 组合: {best_row['划分方法']}_{best_row['预处理方法']}_{best_row['建模方法']}")
|
||
print(f" 测试集R²: {best_row['测试集R²']:.4f}")
|
||
print(f" 测试集RMSE: {best_row['测试集RMSE']:.4f}")
|
||
print(f" 最佳参数: {best_row['最佳参数']}")
|
||
|
||
print(f"\n详细结果已保存: {detailed_path}")
|
||
print(f"批量训练汇总结果已保存: {batch_summary_path}")
|
||
print(f"简化结果已保存: {simple_summary_path}")
|
||
|
||
def load_model(self, preprocess_method: str, model_name: str):
|
||
"""
|
||
加载保存的模型
|
||
|
||
Args:
|
||
preprocess_method: 预处理方法名称
|
||
model_name: 模型名称
|
||
|
||
Returns:
|
||
加载的模型数据
|
||
"""
|
||
filename = f"{preprocess_method}_{model_name}.joblib"
|
||
filepath = self.artifacts_dir / filename
|
||
|
||
if not filepath.exists():
|
||
raise FileNotFoundError(f"模型文件不存在: {filepath}")
|
||
|
||
return joblib.load(filepath)
|
||
|
||
def get_best_model(self, metric: str = 'test_r2') -> Tuple[str, Dict]:
|
||
"""
|
||
获取最佳模型
|
||
|
||
Args:
|
||
metric: 评估指标（默认使用测试集R²）
|
||
可选：'test_r2', 'train_r2', 'test_rmse', 'test_mae',
|
||
'train_rmse', 'train_mae', 'cv_mean', 'best_score'
|
||
|
||
Returns:
|
||
最佳模型的组合名称和结果
|
||
"""
|
||
if not self.results:
|
||
raise ValueError("没有训练结果，请先训练模型")
|
||
|
||
# 对于回归指标，R²和负MSE需要取最大值，RMSE和MAE需要取最小值
|
||
if metric in ['test_r2', 'train_r2', 'cv_mean', 'best_score']:
|
||
best_combo = max(self.results.keys(),
|
||
key=lambda k: self.results[k][metric])
|
||
else: # rmse, mae等，越小越好
|
||
best_combo = min(self.results.keys(),
|
||
key=lambda k: self.results[k][metric])
|
||
|
||
return best_combo, self.results[best_combo]
|
||
|
||
|
||
def main():
|
||
"""主函数示例 - 批量训练"""
|
||
# 创建批量建模实例
|
||
modeler = WaterQualityModelingBatch(r"D:\BaiduNetdiskDownload\yaobao\model")
|
||
|
||
# 批量训练多个目标列的模型
|
||
all_results = modeler.train_models_batch(
|
||
csv_path=r"D:\BaiduNetdiskDownload\yaobao\csv\yangdian_output.csv",
|
||
feature_start_column="374.285004", # 使用列名指定特征开始位置
|
||
preprocessing_methods=['None', 'MMS', 'SS', 'SNV', 'MA', 'SG', 'MSC', 'D1', 'D2', 'DT', 'CT'],#
|
||
model_names=['SVR', 'RF', 'Ridge', 'Lasso'],#, 'ElasticNet', 'XGBoost', 'LightGBM', 'CatBoost'
|
||
split_methods=['spxy', 'ks','random' ], #
|
||
cv_folds=5
|
||
)
|
||
|
||
print(f"\n批量训练完成，共训练了 {len(all_results)} 个目标列的模型")
|
||
|
||
# 显示每个目标列的最佳模型
|
||
for target_column_name, target_results in all_results.items():
|
||
if target_results:
|
||
best_combo = max(target_results.keys(),
|
||
key=lambda k: target_results[k]['test_r2'])
|
||
best_result = target_results[best_combo]
|
||
|
||
print(f"\n目标列 '{target_column_name}' 最佳模型:")
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print(f" 组合: {best_combo}")
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print(f" 测试集R²: {best_result['test_r2']:.4f}")
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print(f" 测试集RMSE: {best_result['test_rmse']:.4f}")
|
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|
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|
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if __name__ == "__main__":
|
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main()
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