查询词典 combinatorial optimization problem

I present cluster schema for combinatorial problem with clustering, design a new crossover operator cluster crossover, study the survival probability of c-schema under c-crossover, apply it successfully to graph coloring, load balancing and maximum spanning tree problems: give measurements of diversity in GA, set up varying crossover probability algorithms to maintain diversity, obtain good results when apply it in avoiding premature convergence and multi-modal functions optimization; establish GAC to be suitable for non stationary function, it can explore the change of environment and find the best solution even for some"anomalous"function.

针对聚类组合优化问题提出了聚类模式，设计了一种新的交换操作：聚类交换并研究了聚类模式在聚类交换操作下的生存可能性，成功的将聚类交换思想和算子应用于图着色、负载平衡和最大生成树问题，佐证了类理论，表明类理论可以指导新的应用算法设计；给出了GA中多样性的度量标准和维护多样性的动态交换概率算法，用于避免过早收敛和多峰函数优化，取得了较好的结果；构造了维持种群多样性以适应动态环境的方法GAC，在某些现有方法无能为力的问题上，GAC能够探测到环境变化，找到当前最优解。

With regard to the character sties of shipping service , the mechanism and operation procedure of combinatorial auction has been designed in order to balance the maximization of seller ' utility and bidder ' total estimated value . For the winner determination problem in combinatorial auction of container shipping service , a general optimization model is set up and modified by introducing quality attribute parameters of container shipping service and constraints of shipping volume etc .

根据运输的&范围经济性&原理，阐述了集装箱航运服务组合拍卖的适用性，围绕价值因素和价值评价因素，分析了集装箱航运服务组合拍卖的比较优势，结合集装箱航运服务的特点，以拍卖者效用最大化和投标者总估值最大化平衡为目标，设计出了组合拍卖的机制和运作程序；针对组合拍卖中的竟胜标问题，建立了集装箱航运服务组合拍卖的一般优化模型，并通过引入集装箱航运服务质量属性参数和运量限制等约束条件，对其进行了改进。

Fancy gold-plated dangling earrings with facetted White Opal crystals.

花式镀金悬垂耳环与facetted白欧泊水晶。

This essay chooses the study aim from biology teachers in middle school in Shi Jiazhuang which tells us that most of the middle school biology teachers in Shi Jiazhuang have the"burnout", lower successfulness, individualize.

本文选取石家庄市初中生物教师作为研究对象，运用问卷调查的方法对石家庄市初中生物教师职业倦怠的现状进行调查，调查结果发现，石家庄市初中生物教师这一群体普遍存在职业倦怠，情感枯竭程度偏高，成就感偏低，去个性化程度最为严重。