基于DPSIR模型和Fisher判别法的铁路施工节能综合评价

Comprehensive Evaluation of Railway Construction Energy Saving based on DPSIR Model and Fisher Discriminant Method

铁路施工阶段作为铁路整个生命周期的重要一环,尚未对其建立一套完整的节能评价方法。以驱动力-压力-状态-影响-响应五个方面考虑的DPSIR模型框架为基础,结合铁路施工阶段能耗的特点,构建了能源节约影响因素指标体系,该体系很好地解决了评价指标之间互相干扰的问题。以节能状态作为评价目标,将其分为优、良、中、合格、不合格5个等级。利用Fisher模型对已有的样本数据进行模拟训练,对待测样本进行验证,证明模型的准确性。相对于其他施工领域,基于Fisher的铁路施工节能评价法的特殊性在于所选取的评价指标不同,并且能够避免权重的计算,使得评价结果更为客观。最后对甘肃省在修的某铁路路段进行了节能效果预测,结果与最后的节能实际效果相符,证明该评价方法在实际的铁路施工评价中切实可行。

The construction stage is an important part of the whole life cycle of railway,and a complete set of energy saving evaluation methods has not yet been established for it.Based on the DPSIR model frame considered from five aspects of driving force,pressure,state,impact and response,combining with the characteristics of energy consumption during the railway construction phase,an index system of energy saving influencing factors was constructed.This method solves the problem of mutual interference among evaluation indexes.Taking energy saving as the evaluation target,it is divided into 5 grades:excellent,good,medium,qualified and unqualified.The Fisher model is used to train the historic data.The test sample is verified and the accuracy of the model is proved.Compared with other construction fields,the Fisher-based evaluation method of railway construction energy-saving is different from the evaluation index selected,and can avoid the calculation of the weight and make the evaluation result more objective.Finally,the energy saving effect is predicted for a railway section under construction in Gansu province.The result is the same as the actual effect,which proves that the evaluation method is feasible in actual railway construction evaluation.