Evaluating the performance of a discrete manufacturing process using RFID: A case study

The material flow is a major focus point in improving productivity in today’s product diversified manufacturing organizations. Nevertheless, there is still a lack of efficient methods to control material flow through manufacturing processes in cases where multi-item tracking is difficult to achieve. This paper presents an RFID-based RTLS (Real-Time Location System) solution for obtaining multi-item work-in-process visibility within a manufacturer. It delivers detailed performance metrics through RTLS data analysis in order to evaluate workflow performance and to obtain a lean process. We pre-filter the RTLS data through the development of a middleware data collection method to acquire near real-time performance evaluation. A case study illustrates the complete process including measurements before and after a workflow redesign. The increased level of detail from RFID measurements yields new insights into shop floor actions and the real effects of redesign efforts.     

一种中频接收电路的版图设计

利用Cadence版图设计工具采用B300工艺对一种中频接收电路芯片的版图设计实例,阐述了模拟集成电路版图的设计过程,论述了包括单元库建立、布局、布线、设计规则检查（DRC）和版图对照原理图检查（LVS）等在内的设计步骤以及进行每一步骤的具体方法,尤其对布局和布线这样的关键步骤进行了重点讨论。最后给出了完整的芯片版图。     

能量管理系统中电网潮流单线图自动生成算法

大规模电力系统的潮流图自动生成问题是一个高度复杂的优化问题,可以分解为厂站自动布局和自动布线问题.对于厂站布局问题,文中引入了引力一斥力模型进行优化,可以快速得到较好的布局效果.在此基础上,再利用遗传算法进一步优化.对于自动布线问题,文中首先引入了带虚拟引线的厂站图标定义,以便于出线布局;然后,采用迷宫探索方法对线路进行横平竖直的自动布线;最后,在变电站出线端自动加上开关元件从而得到最终的图形.针对某省级电网模型的测试表明了所提出的方法的有效性.     

An algorithm ofk-line location for BBL in LSI/VLSI

In this paper, aK-line location algorithm for building block cells in LSI/VLSI is presented. When the relative positions of rectangular cells are given, there are 2 states according to the two orientations of a cell. It is proved that to find the optimum solution from the 2^N states can be reduced to calculate theN states inK-line algorithm. So the algorithm is shown very effective and can be used with association for cluster method in BBL placement. Under certain conditions, this method can also be used to pesudo BBL placement directly.     

Fuzzy multiple attribute decision-making method for a large 300-mm fab layout design

The trend in design of 300-mm wafer fabrication facilities is to seek means to bring about economies of scale. However, this may require trade-offs with various operational efficiencies. This research explores 10 alternative layout designs for a large 300-mm fabrication facility. These alternatives are the different combinations of independent and layer-based cellular design concepts, and are evaluated using a fuzzy multiple attribute decision-making method. A case study has been adopted for an empirical illustration. The results show that a megafab is not a preferred choice. The analysis concludes that a moderate-sized independent cell is a preferred design concept. The results provide fabrication facility management with guidelines for a future 300-mm layout design, which is the backbone of a cost-intensive 300-mm fabrication facility. Future research opportunities are also addressed.     

A method of evaluating VDT screen layout by eye movement analysis

Abstract

The method for evaluating VDT screen layout by eye movements is studied. When the subjects read from the VDT screen, the change in their line of sight was measured by their eye movements. The measured eye movement patterns were divided into the sequential and rereading processes. When related to these characteristics, the performance of subjects was found to be good when the sequential process predominated over the rereading process. The eye movement pattern was shown to change with screen layout. The eye movement pattern proved effective in determining that tabular format is more legible than textual format. This confirmed the usefulness of the method of evaluating VDT screen layout by the eye movement pattern.     

基于FPGA的BLVDS高速通信总线设计

测试总线是测试系统中的一个重要环节,是准确传输信号的关键。详细介绍了LVDS与BLVDS技术,在此基础上论述了BLVDS总线布置设计、PCB布线设计、数据格式设计及通信背板设计,并提出了一种基于FPGA的BLVDS总线设计,采用Verilog HDL实现FPGA内部逻辑电路设计,FPGA完成BLVDS总线上数据的接收、发送,以及数据的缓存。实验结果表明,该总线通信速度快、稳定、可靠。     

专升本类院校新建图书馆设计现状及对策分析

探讨了专升本类院校图书馆建设过程中所存在的问题和需要考虑的因素,为更好的建设图书馆做出更加具体的分析,并提出相应的解决办法,从而保证图书馆的利用率,达到建设目标。     

圆弧斜切面顶板坐标放样施工技术

以长治市新闻大楼工程为例,介绍了圆弧斜切面顶板坐标放样施工技术,具体阐述了工艺原理、施工工艺流程及操作要点,提出了质量控制、成品保护、安全保证等措施,并进行了效益分析,为今后类似工程积累了经验。     

谈宜兴西氿湿地公园景观设计

从地理环境入手,通过调查、植物分析、合理定位,构建符合地方特色的设计,经过甄选,确定了符合公园规划的整体性、合理性、生态性及人性化的绿色设计主题方案。