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Beijing_air_quality_prediction/README.md
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Beijing_air_quality_prediction/README.md
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### 3. SARIMA时间序列预测模型
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#### 建模思路
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1. **数据特性分析**
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- 通过ADF检验验证序列平稳性(p值=0.03,通过5%显著性水平)
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- 季节分解显示存在周周期性(s=7)和长期趋势
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- ACF/PACF分析确定初始参数范围
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2. **参数选择**
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采用网格搜索确定最优参数组合:
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```python
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final_order = (1, 1, 1) # 非季节性参数
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seasonal_order = (1, 1, 1, 7) # 周周期季节性
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{
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"metadata": {
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"ExecuteTime": {
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"end_time": "2025-03-24T07:17:24.611373Z",
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"start_time": "2025-03-24T07:17:22.170632Z"
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"end_time": "2025-03-24T07:23:26.872703Z",
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"start_time": "2025-03-24T07:23:24.709736Z"
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}
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},
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"cell_type": "code",
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"ax.set_xlabel('日期', fontsize=12)\n",
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"ax.set_ylabel('AQI数值', fontsize=12)\n",
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"plt.legend()\n",
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"plt.savefig('./images/AQI.png', dpi=200, bbox_inches='tight')\n",
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"plt.show()\n",
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"\n",
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"# 计算拟合度指标\n",
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],
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"id": "24996a0c06820cdc",
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"outputs": [
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{
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"name": "stdout",
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"output_type": "stream",
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"text": [
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"<class 'pandas.core.indexes.datetimes.DatetimeIndex'>\n"
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]
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},
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{
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"data": {
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"text/plain": [
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]
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}
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],
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"execution_count": 12
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"execution_count": 13
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},
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{
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"metadata": {},
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images/AQI.png
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images/AQI.png
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