概念层次网络中对偶性设计

首先对概念层次网络（ＨＮＣ）理论作简要说明,然后根据ＨＮＣ中层符号个性化设计理论给出对偶性设计方案,和偶性的具体表现,并给出对偶性概念具体表现的注解。     

试析解放初期新疆解放军工业之经济基础

解放初期中央和地方政府均无力投资新疆工业,解放军在缺衣少食的情况下发展了大批现代工业,其经济基础是自给立足、军费节约、个人积蓄和无偿劳动.     

建设教育实习基地的理论与实践研究

教育实习是师范院校教育教学活动的一项重要内容。建立相对稳定的教育实习基地是教育实习中理论与实践联系的必由之路;质量至上、互惠互利、友好协商是建设教育实习基地的准则;坚持解放思想、实事求是、大胆创新、与时俱进,才能使教育实习基地的建设不断适应新形势、实现新飞跃。     

HESTool:基于层次链知识组织的专家系统工具

提出了任务 (Task)的概念 ,每个任务代表一种知识源。不同的任务可以采用不同知识表示形式及推理策略。一个知识库由一组前向或后向链构成的任务链组成 ,实现了知识库的结构化、可视化 ,支持知识部件的可重用与共享。同时 ,结合可视化技术、数据库技术 ,开发出实用性较强的专家系统工具HESTool,该工具提供了一种知识建模机制     

四连杆机构连杆曲线的识别及机构反求

针对工程中查找四连杆机构连杆曲线图谱所存在的精度及效率问题,提出一种利用计算机图形学和数据库原理进行连杆曲线快速识别和查找的方法,此方法的核心是建立起曲线与机构的对应关系,用适当的数据结构表示它们,从而快速识别连杆曲线并建立相应的数据库,该方法还能迅速实现机构的反求。     

SIM—LISP:一个通信网络管理专家系统外壳的设计与实现

本文介绍了笔者为开发名为OONMES的网络管理专家系统所实现的一个简单专家系统工具SIM-LISP。SIM-LISP是一个用C/C++语言来实现的模拟LISP语言的可调用函数集,它短小精巧,速度快,可以完成针对网管专家系统的事实或规则知识的表示、匹配、合一和推理等基本操作,并有与知识对象的连接功能,是网管专家系统内核实现的支撑环境。     

An exact analysis of a joint production‐inventory problem in two‐echelon inventory systems

We consider a two‐echelon inventory system with a manufacturer operating from a warehouse supplying multiple distribution centers (DCs) that satisfy the demand originating from multiple sources. The manufacturer has a finite production capacity and production times are stochastic. Demand from each source follows an independent Poisson process. We assume that the transportation times between the warehouse and DCs may be positive which may require keeping inventory at both the warehouse and DCs. Inventory in both echelons is managed using the base‐stock policy. Each demand source can procure the product from one or more DCs, each incurring a different fulfilment cost. The objective is to determine the optimal base‐stock levels at the warehouse and DCs as well as the assignment of the demand sources to the DCs so that the sum of inventory holding, backlog, and transportation costs is minimized. We obtain a simple equation for finding the optimal base‐stock level at each DC and an upper bound for the optimal base‐stock level at the warehouse. We demonstrate several managerial insights including that the demand from each source is optimally fulfilled entirely from a single distribution center, and as the system's utilization approaches 1, the optimal base‐stock level increases in the transportation time at a rate equal to the demand rate arriving at the DC. © 2011 Wiley Periodicals, Inc. Naval Research Logistics, 2011     

Inventory management with advance capacity information

An important aspect of supply chain management is dealing with demand and supply uncertainty. The uncertainty of future supply can be reduced if a company is able to obtain advance capacity information (ACI) about future supply/production capacity availability from its supplier. We address a periodic‐review inventory system under stochastic demand and stochastic limited supply, for which ACI is available. We show that the optimal ordering policy is a state‐dependent base‐stock policy characterized by a base‐stock level that is a function of ACI. We establish a link with inventory models that use advance demand information (ADI) by developing a capacitated inventory system with ADI, and we show that equivalence can only be set under a very specific and restrictive assumption, implying that ADI insights will not necessarily hold in the ACI environment. Our numerical results reveal several managerial insights. In particular, we show that ACI is most beneficial when there is sufficient flexibility to react to anticipated demand and supply capacity mismatches. Further, most of the benefits can be achieved with only limited future visibility. We also show that the system parameters affecting the value of ACI interact in a complex way and therefore need to be considered in an integrated manner. © 2011 Wiley Periodicals, Inc. Naval Research Logistics, 2011     

面向重用的BOM概念模型相似度评估研究

针对BOM概念模型重用的问题,提出了概念模型相似度用于描述两个概念模型之间的相似程度.并提出相似度评估算法用于计算概念模型之间的相似度.根据概念模型的定义,将相似度的计算归结为名字相似度计算和最优匹配计算两个基本过程.研究了算法中接口权重参数和行为权重参数的不同组合对算法查准率和查全率的影响.通过对JC3IEDM数据模...     

基于Linux/QT的火控系统实时故障诊断方法

针对某数字化火控系统实时故障检测与诊断问题,提出了一种基于对象式框架知识表示的火控系统实时故障诊断方法。该方法采用专家系统与实时进程通信,获取故障征兆,进行实时推理定位故障源。给出了诊断系统的一般架构,介绍故障诊断系统知识表示的形式化描述,实时推理、规则匹配算法和UDP进程通信协议。实际应用证明了这种方法的有效性和可扩展性。