485总线在微机监控系统中的应用

以自来水厂监控系统的应用为例 ,提出了一种低成本的 ,基于 RS- 4 85接口 ,采用 Modbus通讯协议的总线控制系统的实现方案     

OPTIMUM CONTROL ON MINING RATE OF MINERAL RESOURCES

Several model are built to search optimummining rate by using optimum control theory for various pur-pose.A numerical method is extracted to assist both planerand decision maker of mining in their planing or schedulingwork.     

大嘴救援站

Q 车载播放器不认优盘怎么办？为什么爸爸的汽车不认我的优盘呢？国庆的时候出去玩,我把歌曲都复制到优盘上了,但是插进去却一点反应都没有;我还以为优盘被汽车弄坏了,后来插到电脑上,歌都那儿摆着呢!（杨雅冰 广州 读者来信）     

系统轻松做，游戏任你装

从Windows系统下最简单的重装系统的方法。①打开Ghost XP下载网站。②单击打开最新的GhostXP系统下载页面。③单击“点这里下载”,下载后将得到一个ISO文件。解压释放GHO文件     

医用微型全量分析系统中的酶生物传感器研究

酶生物传感器由于其对被分析物具有高度的选择性,成为解决μTAS(微型全量分析系统)中,复杂体系下的多种组分同时测定问题一个有效方法.以基于葡萄糖氧化酶的葡萄糖传感器为例,研究了酶生物传感器对被分析物的选择特性,实验证明,酶生物传感器完全适用于μTAS 中多种组分同时测定的用途.     

我国物流企业适应电子商务的关键：物流再构造

介绍了电子商务时代物流的新特点、新模式,并结合我国物流的实际提出了物流企业适应电子商务需要的应对措施,即物流再构造。     

我是麦霸

夏亚：哟哟哟～又一个梦幻系列，哈哈～看来我们的电饭煲又有新花样可以品尝啦!下面就来看看最新的《妖怪A梦》吧!     

Equipment selection and justification through total productivity model

Traditional methods of economic analysis to justify equipment selection and use are based on several methods such as the Net Present Value, Break-Even Analysis, Pay-Back Period, Return on Investment, among others. However, with the introduction of automation, Flexible Manufacturing Systems (FMS), and Computer Integrated Manufacturing Systems (CIMS), such economic analyses have often resulted in decisions that management did not like to support but did not have much choice to avoid on account of pressure from manufacturing engineers, design engineers and others in the operations areas. The real problem of equipment selection and justification lies in the methodologies used.

This paper presents a unique approach to equipment justification by applying Sumanth's TOTAL PRODUCTIVITY MODEL, whereby the anticipated impact of the proposed equipment on profitability is assessed from the point of total productivity and the five partial productivities. Then, only if the equipment increases the total productivity level beyond its break even point, the equipment is selected or justified.

This method offers a non-traditional approach to justifying and selecting equipment in all types of environment. A numerical example is presented by using LOTUS 1-2-3^TM on an IBM PC. Advantages and limitations to this approach are discussed to provide a balanced perspective on the important issue of equipment selection and justification.     

铜厚膜环行器的研制

采用新型的在大气气氛中烧结的铜厚膜多层导电浆料,应用厚膜混合技术制作了2。2GHz和2.8GHz的环行器。其性能指标可与同类型采用薄膜贵金属制作的环行器相媲美,且工艺简单,成本低及生产周期短。     

A micro computer decision support system for the total-productivity model (TPM)

The Total Productivity Model (TPM), developed by Sumanth in 1979, has been applied to a number of situations involving manufacturing as well as service-oriented operations. The diversity of applications on the one hand, and the flexibility of usage of the microcomputers on the other hand, have helped to focus the need for a micro-computer based Decision Support System (DSS). This paper presents such a system using the Macintosh Computer. This DSS is a highly interactive, menu-driven program that can provide on-the screen capabilities of individual operational units as well as the firm that comprises of them. The system has several convenient features to assess the “PRODUCTIVITY- ORIENTED PROFITABILITY” of any type companies/organizations. The system logic and flow chart, data input and output formats, and sensitivity analysis will be shown and discussed in the paper. A balanced critique will be offered to view the system in a proper perspective with respect to structural elements of the Decision Support System.