Pro／Engineer中的圆角特征处理

本文从设计原理的角度结合作者的使用经验，分析了Pro／E中圆角特征的作用、构造方法及注意事项，以利于该特征在众多菜单中理清思路并正确构造圆角特征。     

网络最大流与最小割集的矩阵算法

本文给出了解决运输问题为中心的一类特殊的线性规划问题的新的、简便的算法。网络最大流与最小割集的矩阵算法,不仅能解决许多这类问题,而且能使最小费用流、分配问题和运输问题容易通过计算机来实现。     

家电企业营销链整合的途径

营销链是家电企业参与市场竞争的关键环节，对其流通网络的再造具有重要作用，文章总结了家电企业营销链整合的三个途径，分析了渠道自身剥离、建立产销联盟和发展代理销售等可供借鉴的有效方法。     

虚拟供应链在中小企业集群中的可靠性分析

文章通过对两种不同企业集群组织形式的比较,重点探讨了形成企业竞争优势的企业虚拟组织的机理及结构功能.以关系型同质中小企业集群为研究对象,基于供应链虚拟一体化的思路,对其竞争优势进行研究,同时提出这种组织模式可能存在的潜在问题并加以理论上的证明,力求找到适合我国中小企业现状的发展之路.     

用FoxBase实现超文本多媒体技术飞机主客仓空调故障诊断系统

本文通过一个应用系统的编制过程，阐述了用数据库技术实现超文本多媒体技术的方法。     

基于FPGA的高准确度数字频率信号源设计

介绍了直接数字频率合成技术的实现方法,分析了其优越的技术特性。根据其特性,利用FPGA设计了高准确度的数字频率信号源。仿真结果表明,与传统的信号源相比,使用该方法实现的信号源,其信号种类多,准确度高,满足测试设备数字化、软件化的趋势。     

Grinding temperature and energy ratio coefficient in MQL grinding of high-temperature nickel-base alloy by using different vegetable oils as base oil

Vegetable oil can be used as a base oil in minimal quantity of lubrication(MQL). This study compared the performances of MQL grinding by using castor oil, soybean oil, rapeseed oil, corn oil, sunflower oil, peanut oil, and palm oil as base oils. A K-P36 numerical-control precision surface grinder was used to perform plain grinding on a workpiece material with a high-temperature nickel base alloy. A YDM–III 99 three-dimensional dynamometer was used to measure grinding force,and a clip-type thermocouple was used to determine grinding temperature. The grinding force, grinding temperature, and energy ratio coefficient of MQL grinding were compared among the seven vegetable oil types. Results revealed that(1) castor oil-based MQL grinding yields the lowest grinding force but exhibits the highest grinding temperature and energy ratio coefficient;(2) palm oil-based MQL grinding generates the second lowest grinding force but shows the lowest grinding temperature and energy ratio coefficient;(3) MQL grinding based on the five other vegetable oils produces similar grinding forces, grinding temperatures, and energy ratio coefficients, with values ranging between those of castor oil and palm oil;(4) viscosity significantly influences grinding force and grinding temperature to a greater extent than fatty acid varieties and contents in vegetable oils;(5) although more viscous vegetable oil exhibits greater lubrication and significantly lower grinding force than less viscous vegetable oil, high viscosity reduces the heat exchange capability of vegetable oil and thus yields a high grinding temperature;(6) saturated fatty acid is a more efficient lubricant than unsaturated fatty acid; and(7) a short carbon chain transfers heat more effectively than a long carbon chain. Palm oil is the optimum base oil of MQL grinding, and this base oil yields 26.98 N tangential grinding force,87.10 N normal grinding force, 119.6 °C grinding temperature, and 42.7% energy ratio coefficient.     

基于供应链的战略采购模式下供应商选择研究

以某汽车制造企业为研究对象，在该企业战略采购流程下的供应商开发流程基础上，利用多色集合理论对供应商进行初选，然后对供应商进一步进行评价，最后根据供应商评价结果，进行供应商级别调整和供货配比。该案例分析在多色集合的理论应用于实际方面做出了有益的探索，为企业信息化管理中实施战略采购提供了有效的方法。     

飞机备件的供应保障

从装备的使用和维修的角度出发,介绍了飞机备件的选用原则和配置要求,给出了备件的确定、备件的种类及数量的计算方法,并介绍了国外常用后勤综合保障软件OPUS10,可供备件保障研究人员参考。     

面向制造业的逆向供应链中的产品回收

针对制造业中产品回收的问题,在分析逆向供应链特点的基础上,讨论了逆向供应链中的产品回收过程、产品回收网络和产品回收的难点,为进一步定量分析产品回收网络奠定了基础.