小微企业投资安全风险评估建模仿真

摘要

A risk assessment model of investment safety for small and micro enterprise is proposed by using infor-mation entropy.Firstly,the investment safety risk-vulnerability matrix and risk threat-loss matrix is built.Then each weight of safety risk factor is calculated integrated with information entropy theory,and the intuitionist fuzzy decision matrixes of investment safety risk are built to work out the objective attribute weight of investment risk factor.Moreover,the subjective assessment index score of investment safety risk with public participation is obtained,and the evaluation matrix of objective index is built.The standardization formula is used to make non-dimensional process to evaluation matrix.Finally,the entropy and entropy weight of assessment index of each objective investment risk is obtained,and the risk assessment model for investment safety of small and micro enterprise with public participation is built after gaining the score in all risk assessment index of investment safety.The simulation results show that the modified model can provide the theoretical basis for the quantitative evaluation research on evaluation system of small and micro enterprise's investment risk.%对小微企业投资安全风险进行准确评估,可降低投资风险,减小小微企业的经济损失.进行投资安全风险评估时,需要利用各个客观投资风险评估指标的熵值和熵权,获取小微企业在所有投资安全风险评估指标上的得分,完成投资安全风险评估,但是传统的评估方法依赖主观赋值,无法获取客观投资风险评估指标的熵值和熵权,存在建模误差大的问题.提出采用信息熵的小微企业投资安全风险评估模型.组建小微企业投资安全风险-脆弱性矩阵和风险威胁-损失矩阵,融合信息熵理论计算各个安全风险因素的权重,组建投资安全风险直觉模糊决策矩阵,计算出投资风险因素客观属性权重,获取公众参与下小微企业投资安全风险主观性评估指标得分,建立客观指标评估矩阵,利用标准化公式对评估矩阵进行无量纲化处理,得到各个客观投资风险评估指标的熵值和熵权,获取公众参与下小微企业在所有投资安全风险评估指标上的得分,组建公众参与下小微企业投资安全风险评估模型.仿真结果证明,改进模型为小微企业投资风险评估系统的定量评价研究提供理论依据.