exponential attenuation meaning in English

指数减弱
指数衰减

Primarily there are two aspects : 1 ) the calculation model of the value of land classifying units - - model of time distance attenuation . in the calculation model of the value of land classifying units , author brings forward the model of time distance attenuation . in this model adopting the network analysis , and by establishing the road network , and proceeding path analysis , computing the time distance , then proceed the exponential attenuation or straight line attenuation on time distance , get the value of influence factor of the land classification unit
主要有两个方面： 1 、定级单元分值计算模型? ?时间距离衰减模型在定级单元分值的求取模块中，提出了时间距离衰减模型，模型中采用网络分析的方法，通过建立道路网络，进行路径分析，求取时间距离，进而按时间距离进行指数衰减或直线衰减，得到定级单元因素因子影响分值。