基于信息获取量测度的赊销收益估测模型研究

随着市场经济的发展,赊销已成为企业重要的销售方式,如果能在赊销活动中捕捉到更多的市场机会,企业可以在扩大销售的同时降低存货风险。然而,赊销也会给企业带来一定的信用成本和调研成本。因此,企业面对随时可能灭失的商机,如何在既定的时间内选用最佳的调研方法,从而做出相对正确的赊销决策并有效控制赊销风险,对企业意义重大。

基于不同信息获取量的赊销决策风险度判别模型

面对随时可能灭失的商机,如何在既定的时间内选用最佳的调研方法,从而做出相对正确的赊销决策并有效控制赊销风险,对企业意义重大.将不完全信息状态下企业赊销客户的赊销决策问题视为一个时间离散、状态连续的随机过程.在充分考虑有限调研时间内调研方法选择对赊销客户信用等级判别精确度影响的基础上,结合空间分析方法构建了基于不同信息获取完备程度的客户信用评估模型,引用判别分析思想判别不完全信息下的客户信用评估精确度,并借鉴风险性决策思想计算不同赊销风险程度下的赊销期望收益.最后以一则算例展示模型的实用性.

A fast method to diagnose phase transition from amorphous to microcrystalline silicon

A series of hydrogenated silicon thin films were prepared by the radio frequency plasma enhanced chemical vapor deposition method (RF-PECVD) with various si-lane concentrations. The influence of silane concentration on structural and elec-trical characteristics of these films was investigated to study the phase transition region from amorphous to microcrystalline phase. At the same time,optical emis-sion spectra (OES) from the plasma during the deposition process were monitored to get information about the plasma properties,Raman spectra were measured to study the structural characteristics of the deposited films. The combinatorial analysis of OES and Raman spectra results demonstrated that the OES can be used as a fast method to diagnose phase transition from amorphous to microcrystalline silicon. At last the physical mechanism,why both OES and Raman can be used to diagnose the phase transition,was analyzed theoretically.