CRT and LCD monitor and process materials evaluated for environmental improvement

Decision rules have been developed and applied to the bills of materials of a color cathode‐ray tube (CRT) and a liquid‐crystal‐display (LCD) desktop monitor to determine which product and process materials will be evaluated in an environmental life‐cycle assessment. Materials of significant mass, of technological importance, and of potential environmental impact are targeted. The list of materials identified are those for which life‐cycle inventory data will be obtained for the materials extraction and materials processing life‐cycle stages of a CRT and an LCD. Additionally, materials identified will also be used to represent life‐cycle impact in terms of resource consumption, as well as surrogates for occupational health impacts.     

液晶驱动电路HT 1612及其在蒸汽流量积算器中的应用

The features and the basic operation method of the HT1621 liquid crystal display driving circuit are introduced． With the steam flow to talizer as example the design of relevant hardware and software for the application of HT1621 in liquid crystal display ins truments is described in brief．     

非接触IC卡应用系统设计

主要介绍非接触IC卡在考勤管理系统中的应用和实现。非接触IC卡读写系统是一种经高科技开发、研制、生产出来的新型管理系统 ,它具有操作方便、安全、可靠性高等优点。在考勤系统中 ,IC卡作为身份识别 ,实现了考勤管理的电子化。系统能准确反映出某一天中每一位职工或某一部门的出勤情况 ,为管理人员提供准确的考勤数据 ,并生成打印报表 ,供管理部门决策     

基于双处理器和双口SRAM的高速图形LED屏

介绍了一种基于双处理器和双口SRAM的高速图形LED屏的硬件和软件。该系统采用两片单片机分别负责显示扫描和图形变换 ,两者通过双口SRAM连接 ,实现高速图形显示     

单片机在立体升降库系统中的应用

介绍了以单片机为控制核心 ,实现在立体升降库中取货、送货的控制方法 ,以及库存空间调整的算法。叙述了控制系统的功能特点、硬件和软件的设计思想     

调制光安全保护系统的设计

介绍了利用红外线的发射与接收所构成的光束保护系统。红外线的发射与接收形成一“安全网” ,利用其档光性能 ,可以实现安全防范功能。为提高系统抗干扰性能 ,采用调制的红外光线 ,经过信号处理 ,驱动继电器动作 ,从而实现报警和保护。重点阐述了光束保护系统的基本工作原理 ,并给出了主要硬件原理图。     

PC机与多单片机组成串行通信的新尝试

以实际应用的小型集散变频调速系统为例 ,介绍一种PC机与多AT89C2 0 51单片机之间串行通信的接口电路 ,并提出一种新的通信方法 ,即采用QBASIC语言提供通信语句来编写多机通信程序。该方法硬件紧凑 ,软件编程简单可靠。     

Path Analysis and Renaming for Predicated Instruction Scheduling

Increases in instruction level parallelism are needed to exploit the potential parallelism available in future wide issue architectures. Predicated execution is an architectural mechanism that increases instruction level parallelism by removing branches and allowing simultaneous execution of multiple paths of control, only committing instructions from the correct path. In order for the compiler to expose and use such parallelism, traditional compiler data-flow and path analysis needs to be extended to predicated code. In this paper, we motivate the need for renaming and for predicates that reflect path information. We present Predicated Static Single Assignment (PSSA) which uses renaming and introduces Full -Path Predicates to remove false dependences and enable aggressive predicated optimization and instruction scheduling. We demonstrate the usefulness of PSSA for Predicated Speculation and Control Height Reduction. These two predicated code optimizations used during instruction scheduling reduce the dependence length of the critical paths through a predicated region. Our results show that using PSSA to enable speculation and control height reduction reduces execution time from 12 to 68%.     

基于IC卡的水表及收费管理系统的设计与实现

本文介绍了一种基于IC卡的水表及收费管理系统的设计和实现,给出了系统的总体结构,并对其主要组成部分的原理和功能作了阐述。     

8098单片机控制下的斜井绞车多功能信号系统

介绍了一个用8098单片机控制的集通讯、打点、显示、存储 、打印及报警于一体的斜井多功能信号系统。从软件、硬件、技术关键等几方面阐述了其系 统,解决了时钟、日期、按键、串行显示、并行显示、抗干扰、长距离传输、普通电缆可靠 传输高速数据等关键问题。