Efficient Data—parallel Computations on Distributed Systems

Task scheduling determines the performance of NOW computing to a large extent.However,the computer system architecture,computing capability and system load are rarely proposed together,In this paper,a biggest-heterogeneous scheduling algorithm is presented.It fully considers the system characteristics(From application view).structure and state,So it always can utilize all processing resource under a reasonable premise.The results of experiment show the algorithm can signuificantly shorten the response time of jobs.     

多目标遗传算法在甲醇合成优化中的应用

针对甲醇合成优化中的多个目标函数 ,对多目标遗传算法进行了改进 ,引进了多个体交叉算子和种群间的变异算子 ,使用多目标权重因子解决了适应度函数的构造问题 ,不仅提高了算法本身的运行速度 ,而且在处理实际的多目标优化时 ,提供了较好的灵活度 ,在指导实际生产中表现出了良好的性能。     

L-缬氨酸生产菌的选育及基于遗传算法的发酵培养基优化

采用以黄色短杆菌TV10为出发菌株,经紫外线、硫酸二乙酯逐级诱变处理,在含磺胺胍(SG)、α-氨基丁酸(α-AB)、2-噻唑丙氨酸(2-TA)结构类似物平板上定向筛选,获得L-缬氨酸高产菌株TV230。运用遗传算法,对L-缬氨酸发酵培养基的优化进行了研究,用10组实验完成了8因素20水平的优化任务。实验结果表明,采用优化后的发酵培养基能使缬氨酸的产量提高19.4%。     

基于互信息的视网膜眼底图像配准方法

提出一种在于互信息的视网膜眼底图像配准方法，并采用遗传算法求解待配准图像的变换参数。与传统方法相比，该方法具有配准精度高、可可靠性好、不需要进行图像的预分割和特征提取等特点，配准精确度可以达到亚像素级。     

运用遗传算法对制冷蒸发器过热度控制的优化方法

在制冷系统动态仿真的基础上，引入遗传算法对蒸发器过热度模糊控制的隶属度函数进行了优化，并给出了三角形隶属度函数的优化方案，利用MATLAB软件实现了仿真和优化过程，进行了优化模糊控制和比例积分（PI）控制品质的对比实验。结果表明，优化后的模糊控制使过热度的超调量减小，使阀的动作平稳。     

改进遗传交叉算子求解TSP问题

遗传算法中的交叉算子最根本的作用就是要使子代继承父代的优秀基因。本文着重考虑了用遗传算法求解TSP问题中遇到的交叉算子，根据TSP问题的特点，构造出一种能很好继承父代优秀基因的交叉算子；实例计算表明该算法收敛速度快，从而可以进一步改善遗传算法的性能。     

Direct multicriteria clustering algorithms

In a multicriteria clustering problem, optimization over more than one criterion is required. The problem can be treated in different ways: by reduction to a clustering problem with the single criterion obtained as a combination of the given criteria; by constrained clustering algorithms where a selected critetion is considered as the clustering criterion and all others determine the constraints; or by direct algorithms. In this paper two types of direct algorithms for solving multicriteria clustering problem are proposed: the modified relocation algorithm, and the modified agglomerative algorithm. Different elaborations of these two types of algorithms are discussed and compared. Finally, two applications of the proposed algorithms are presented. Elaborated version of the talks presented at the First Conference of the International Federation of Classification Societies, Aachen, 1987, at the International Conference on Social Science Methodology, Dubrovnik, 1988, and at the Second Conference of the International Federation of Classification Societies, Charlottesville, 1989. This work was supported in part by the Research Council of Slovenia.     

不完全投影据图像重建的最小交叉熵算法

提出图像重建的最小交叉熵算法,详细推导了算法的有关公式,并给出程序实现框图.计算机模拟结果表明:最小交叉熵算法的性能优于最大熵算法.     

计算不连续映射不动点或零点的PL同伦算法若干收敛条件

本文证明了几个不连续映射的不动点或零点定理的条件是PL同伦算法收敛的充分条件。