半灵活主链型液晶聚合物的结构特性

采用分子动力学(MD)模拟方法研究了半灵活主链型液晶聚合物(LCPs)的结构特性,其中分子链通过最新定义的模型——Solo-LJ-SP-GB模型来描述。该模型已被证实所需计算时间不到传统GB/LJ模型的十分之一,可大大地提高计算效率。通过模拟半灵活主链型LCPs 的液晶形成过程,研究了LCP分子中不同个数的间隔体对该材料热力学特性的影响。研究发现其热力学特性呈现出与间隔体个数相关的奇偶效应,这与现有试验结果相当吻合。通过对半灵活主链型LCPs的局域空间方位时间相关函数及平移灵活性的测量,并与传统GB/LJ模型的模拟结果相比较,发现两种模型显示出相似的各向异性及灵活性。     

Partner selection model and soft computing approach for dynamic alliance of enterprises

Partner selection is an active research topic in agile manufacturing and supply chain management. In this paper, the problem is described by a 0-1 integer programming with non-analytical objective function. Then, the solution space is reduced by defining the inefficient candidate. By using the fuzzy rule quantification method, a fuzzy logic based decision making approach for the project scheduling is proposed. We then develop a fuzzy decision embedded genetic algorithm. We compare the algorithm with tranditional methods. The results show that the suggested approach can quickly achieve optimal solution for large size problems with high probability. The approach was applied to the partner selection problem of a coal fire power station construction project. The satisfactory results have been achieved.     

两强竞争市场中的企业广告策略分析

将Dawid和Feichtinger的混沌型的广告扩散型扩展到两强竞争的市场环境下，为检验模型的可用性开发了一个计算机仿真系统，仿真的结果表明在两强竞争下的企业最好的广告策略是增加广告投入直到达到“双赢状态”，即市场占有率的振荡即将发生的临界状态，分析应用结果表明提出的混沌型模型和开发的仿真系统为市场竞争环境下的企业广告策略的分析和制定提供了一个有效的工具。