Prolog动态代码的两种语义及其实现方法

Prolog数据库操作内部谓词是Prolog非逻辑成份的一个重要组成部分。为了实现Prolog程序的可移植性,这些内部谓词应有一致的操作语义。本文首先讨论了两种比较合理的语义,然后论述了这两种语义在WAM框架下的实现方法。     

编译型PROLOG系统的若干优化实现技术

文中论述可应用于设计编译型Prolog系统的若干优化实现技术。这些技术包括:执行驱动编译策略,代码分类以及数据库操作内部谓词的操作模式。     

Lanchester方程与火力指数的内在联系

本文从Lanchester 方程出发,利用正矩阵的特性,将矩阵特征向量与火力指数有机地联系起来。通过例子进一步说明火力指数是Lanchester 方程中威力系数概念的推广;它不仅与武器本身有关,而且依赖于整个战斗的武器配系。当某些种类的武器被摧毁,战斗格局发生一定变化时,火力指数也会发生变化。火力指数还决定于火力分配原则。     

一种新的自变量选择准则

本文提出了一种着眼于提高回归系数估值精度的自变量选取准则,同时给出了相应的算法。     

内外干扰因素对液体火箭发动机的影响分析

在已有的液体火箭发动机稳态工况的非线性数学模型基础上,计算分析了单干扰因素对液体火箭发动机参数的影响,用非线性方法和小偏差方法对比分析了两个干扰因素分别和共同对发动机参数的影响。所得结论可用于泵压式燃气发生器循环的液体火箭发动机试验结果分析、可靠性及故障分析,也揭示了此类发动机参数随各种干扰因素的变化规律     

基于agent 的分布式集成环境

本文提出了一种基于多ａｇｅｎｔ的分布式集成环境ＤＩＥＭＡ的通用框架,描述了ＤＩＥＭＡ的工作原理;提出了服务ａｇｅｎｔ和请求ａｇｅｎｔ的实现框架及其设计与实现。     

反应堆轴向功率不均匀系数快速算法

本文提出了用于反应堆运行现场安全校核的反应堆轴向功率不均匀系数的快速算法,导出了轴向功率不均匀系数的快速计算式。     

采用改进遗传算法的舰载机保障调度方法

舰载机保障作业过程受到多种资源约束,同时可能存在突发事件的干扰。针对此特点,分析并制定干扰情况下的模型修正策略。在遗传算法中引入禁忌搜索算子改进传统遗传算法的变异操作,并通过具体实例进行仿真验证,其结果证明改进后的遗传算法在优化含干扰事件的多机保障问题时效率更高,并通过甘特图直观地反映重调度方案,为真实情况下有效处理舰载机保障过程中的干扰事件奠定理论基础。     

Energy‐efficient scheduling for sustainable manufacturing systems with renewable energy resources

Environmentally friendly energy resources open a new opportunity to tackle the problem of energy security and climate change arising from wide use of fossil fuels. This paper focuses on optimizing the allocation of the energy generated by the renewable energy system to minimize the total electricity cost for sustainable manufacturing systems under time‐of‐use tariff by clipping the peak demand. A rolling horizon approach is adopted to handle the uncertainty caused by the weather change. A nonlinear mathematical programming model is established for each decision epoch based on the predicted energy generation and the probability distribution of power demand in the manufacturing plant. The objective function of the model is shown to be convex, Lipchitz‐continuous, and subdifferentiable. A generalized benders decomposition method based on the primal‐dual subgradient descent algorithm is proposed to solve the model. A series of numerical experiments is conducted to show the effectiveness of the solution approach and the significant benefits of using the renewable energy resources.     

Optimal allocation of minimal repairs in parallel and series systems

In reliability engineering, the concept of minimal repair describes that the repair brings the failed unit (eg, system or component) to the situation which is same as it was just before the failure. With the help of the well‐known Gamma‐Poisson relationship, this paper investigates optimal allocation strategies of minimal repairs for parallel and series systems through implementing stochastic comparisons of various allocation policies in terms of the hazard rate, the reversed hazard rate, and the likelihood ratio orderings. Numerical examples are presented to illustrate these findings as well. These results not only strengthen and generalize some known ones in the seminal work of Shaked and Shanthikumar, but also solve the open problems proposed by Chahkandi et al.'s study and Arriaza et al.'s study.