In this paper, We availed the property of geometic convex function generalized a kind of important sum inequality and obtained some new conclusions.
文章利用几何凸函数的性质推广了一类重要的和式不等式，得到了一些新的结论。
2
The generalized cost was defined as the linear weighted sum of travel time, traffic congestion degree, and section reliability.
将广义成本定义为行驶时间、道路拥挤度、路段可靠性三者的线性加权和。
3
In the first model users' generalized travel cost are assumed to be weighted sum of the standard deviation and the mean travel time, and users have perfect knowledge of the road network condition.