utility u function

基本解释

The article points out the weakness of traditional U-R utility function and studies the E-V utility function which is based on the expected profit and variance.
在指出传统U-R效用函数不足的基础上，研究了基于期望收益和方差的E-V效用函数，提出并证明了E-V效用函数判定风险态度的充要条件。
In this paper, we set up the axiom system of subjective information structure and introduce the definitions of Information Space and Information Utility Function (I. U. F. ) . The existence of the I.
首先，本文在建立主观信息结构的公理化体系基础上定义了信息空间及信息效用函数，证明了信息效用函数的存在性及唯一性。

效用函数
Highway; optimum toll rate; Maximum likelihood method; Existence; General travel cost; Time value; Transportation cost; UtilityUfunction; Economic foundation; Distribution model of traffic volume.
高速公路; 最优费率; 最大似然法; 存在性; 广义行程费用; 时间价值; 运营成本; 效用函数; 经济基础; 交通量分担模型。