一种基于DE-PP和一阶微分方程的生猪价格指数拟合模型  

A Pig Price Index Fitting Model Based on DE-PP and First Order Differential Equation

作　　者：查进道[1] ZHA Jindao

机构地区：[1]江苏经贸职业技术学院,江苏南京211168

出　　处：《智慧农业导刊》2021年第18期18-20,23,共4页JOURNAL OF SMART AGRICULTURE

摘　　要：生猪价格是我国农产品市场的核心要素,因此研究生猪价格的内在规律和做好生猪价格的预测具有重要意义。文章一方面针对影响生猪价格指数的主要因素采用差分进化算法和投影寻踪理论进行降维得到一个向量,并建立起该向量关于时间的函数关系;另一方面,通过构造一阶微分方程得到生猪价格指数关于时间的拟合函数关系。从而建立起生猪价格指数关于影响其主要因素间的拟合模型。仿真结果表明了该模型的有效性。The price of live pigs is the core element of agricultural product market.Therefore,the study of the internal laws and the prediction of live pig price are of great significance.In this paper,on the one hand,according to the main factors affecting pig price index,differential evolution algorithm and projection pursuit theory are used to reduce the dimension of a vector,and the functional relation of the vector with respect to time is established;on the other hand,the fitting function relation of pig price index with time is obtained by constructing the first order differential equation.Thus,the fitting model of the price index of live pig with respect to it's main factors is established.The simulation results show that the model is effective.

关 键 词：生猪价格指数 差分进化算法 投影寻踪理论 一阶微分方程 

分 类 号：F323.7[经济管理—产业经济]