摘要
对现有文献给出的农业机器经济寿命计算方法，按追求的目标进行了分析归纳，认为应分为３类，其基本的计算方法有４种。在此基础上，分别给出了各种计算方法的通用数学模型。进而对其进行了分析，指出了目前研究中存在的一些问题。
According to different pursued goals,the methods of calculating the economic life offarm machinery showed in existing literatures were classified into three kinds and there werefour kinds of fundamental calculating methods. Based on this,general mathematic models toeach method were presented. By further analysis,some conclusions were deduced.1.It was pointed out for the first time that,according to the relative profit ratio method(i.e new MAPI method)for the calculation of economic life of AM,if the new machine usersand machine buyers had the same decision criterion,generally speaking,it is impossible fora machine user to get more profits by selling used machines and buying new ones than by stillusing the used ones.It was also pointed out that if both the new machine buyer who has soldthe used one and the used machine buyer belong to the same organization,from the viewpointof the organization,it is not suitable to calculate the economic life of machine by new MAPImethod. 2.It was proposed for the first time that the methods of the minimal average annual cost. the minimal average unit operation cost,the maximal average annual profit had all implied a-supposition that both the new and the used machines had the same change of the annual operation and costs of various items.This supposition is acceptable and reasonable only whenboth the new and the used machines belong to the same rnodel and the average economic lifeof the group of this model was calculated.3.The economic benefits of RMR of AM should be calculated according to different targetsselected.
出处
《农业机械学报》
EI
CAS
CSCD
北大核心
1995年第2期111-115,共5页
Transactions of the Chinese Society for Agricultural Machinery
基金
浙江省自然科学基金
