一种解决知识不相容的方法

介绍了知识库更新的基本概念,并且在命题知识库的范围内研究了知识库更新的方法,结合实际应用给出了一种特殊情况下知识不相容的判定方法。     

More military base closure? Considering the alternatives*

Despite multiple base closing rounds, the United States Department of Defense still has excess base capacity, and thus President Trump and high-level Defense Department officials are calling for more base closure through the Base Realignment and Closure (BRAC) process. However, another BRAC may not be the optimal solution, because simple base closure is not an efficient way to reduce surplus base capacity. Thus, Defense Department officials should consider other methods to reduce surplus capacity, including reduction in base size, leasing excess base property, or transferring it to another government agency for a variety of alternative uses. The surplus capacity issue also offers an opportunity to DOD to reassess base utilization, to update base requirements with current and future force structure. While BRAC focuses on American military bases, the process and alternatives also have international applications.     

Does Military Spending Nonlinearly Affect Economic Growth in South Africa?

Using annual data collected from 1988 to 2015, this study provides evidence of a non-linear relationship between military spending, economic growth and other growth determinants for the South African economy. The empirical study is based on estimates of a logistic smooth transition regression (LSTR) model and our empirical results point to an inverted U-shaped relationship between military spending and economic growth for the data. Furthermore, our empirical results suggest that the current levels of military spending, as a component of total government expenditure, are too high in the South African economy and need to be transferred towards more productive non-military expenditure in order to improve the performance of economic growth and other growth determinants.     

一种故障诊断专家知识库编辑和维护系统

设计了一种适用于火控系统的故障诊断专家知识库编辑和维护系统。从诊断对象的结构和功能原理出发,提出了一种对象式框架知识表示方法。该方法将诊断对象的原理知识统一为一种形式,简化了知识表示的复杂度。该系统分别建立对象式框架的状态、测试、规则、维修、图表等知识项,利用这些知识项建立系统的知识库。还对系统的可视化实现和功能进行了说明。实践表明该方法可以提高系统的直观性、简洁性,提高人机交互能力。     

Economic design of a two-stage control chart based on both performance and surrogate variables

The traditional approach to economic design of control charts is based on the assumption that a process is monitored using only a performance variable. If, however, the performance variable is costly to measure and a less expensive surrogate variable is available, the process may be more efficiently controlled by using both performance and surrogate variables. In this article we propose a model for economic design of a two-stage control chart which uses a highly correlated surrogate variable together with a performance variable. The process is assumed to be monitored by the surrogate variable until it signals out-of-control behavior, then by the performance variable until it signals out-of-control behavior or maintains in-control signals for a prespecified amount of time, and the two variables are used in alternating fashion. An algorithm based on the direct search method of Hooke and Jeeves [6] is used to find the optimum values of design parameters. The proposed model is applied to the end-closure welding process for nuclear fuel to compute the amount of reduction in cost compared with the current control procedure. © 1999 John Wiley & Sons, Inc. Naval Research Logistics 46: 958–977, 1999     

The evaluation of a possible future Sino-Japanese armed conflict through the application of the ACEI-model

There is relatively little formal modeling of the economic effects of armed conflicts even though they have substantial economic effects. We set forth a new model, namely the armed conflict economic impact model – ACEI-Model. The model looks at the economic effects of war in three different stages: (i) pre-conflict stage; (ii) armed conflict stage; and (iii) post-conflict stage. The model is based on economic desgrowth (-δ) and other new conceptual indicators. We evaluate an imaginary armed conflict between China and Japan by applying the ACEI-Model.     

利用XMI实现基于BOM的仿真模型组件的交换

BOM(Base Object Model)是快速构建仿真系统或联邦的可重用信息交互包,基于BOM的仿真模型组件是BOM信息描述的实现体,作为构建仿真系统或联邦的可重用模块。通过应用模型驱动体系结构(MDA,Model-Driven Architecture)提出的实现模型交换标准XMI(XML-based Metadata Interchange),HLA(HighLevel Architecture)仿真模型组件的建模和实现在两个不同层次上实现跨平台、跨语言和跨领域间的交换,而且HLA的重用性和互操作性思想能够在除分布式仿真领域外的其他应用领域中得到推广。     

基于主动知识库的地形图汉字注记智能提取方法

地形图中包含了大量的字体丰富的汉字注记 ,正确提取并识别这些汉字是图纸处理中的关键组成部分。简要分析了交互提取及自动提取两种方法的优缺点 ,提出并实现了一种基于主动知识库的结合两者优点的汉字注记智能提取方法 ,取得了很好的应用效果。     

知识库系统及关系知识库机系统结构的研究

文中首先以数据库为基础研究了知识库系统KBS-1,然后基于关系知识模型,研究了一台关系知识库模型机,并以它为硬核研究了知识库系统KBS-2,最后进行了性能分析。     

基于丛生树的多流水线并行Hash连接的处理机分配算法

本文介绍了并行数据库中实现多流水线Ｈａｓｈ连接的处理机分配算法，该算法对于执行Ｈａｓｈ连接的丛生查询树可同时实现流水线内并行（ＩｎｔｒａｐｉｐｅｌｉｎｅＰａｒａｌｅｌ）和多流水线间的并行（ＩｎｔｒａｐｉｐｅｌｉｎｅＰａｒ－ａｌｅｌ