说明：  在人们的生产实践中，经常会遇到如何利用现有资源来安排生产，以取得最大经济 效益的问题。此类问题构成了运筹学的一个重要分支—数学规划，而线性规划(Linear Programming 简记LP)则是数学规划的一个重要分支
(In people's production practice, often encounter how to use existing resources to arrange production, in order to achieve maximum economic benefits. Such problems constitute an important branch of operations Research-Mathematical programming, and linear programming (LP) is an important branch of mathematical programming.)