应用于公共广播的串口网桥的设计与实现

本文提出一种应用于网络化公共广播系统的串口网桥,为公共广播系统的控制主机和广播终端之间提供了透明数据传输服务,使得能将传统公共广播系统终端应用于网络化公共广播系统中,为实现传统公共广播系统向网络化公共广播系统的升级提供了一种有效的解决方案。该串口网桥的硬件设计基于高集成度的网络单片机MC9S12NE64,配合基于嵌入式TCP/IP协议栈OpenTCP的软件,具有结构简洁,体积小,功耗低,效率高和灵活性强的优点。     

Peacemaking and consolation in Japanese preschoolers witnessing peer aggression.

This article reports developmental changes relating to reconciliation and bystanders' affiliation with victims of aggression (i.e., consolation) among 3- to 5-year-old Japanese preschool children. Use of the postconflict-matched control (PC-MC) method revealed that the frequency with which reconciliation and consolation were offered to a victim increased steeply in 5-year-olds, compared with 3- and 4-year-olds. The complexity of contextual factors affecting the occurrence of reconciliation and the form of consolation increased with age. Consolation occurred more often before reconciliation than after among all but the 3-year-olds and occurred more often when no reconciliation occurred than when it did occur among all classes. These findings support the view that consolation functions as a substitute for reconciliation, lessening the tension experienced by the victim of aggression. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

高性能谐振控制器MC34066及其应用

介绍了专用谐振控制器MC34066的内部电路、性能及应用，并给出了采用MC34066设计的200W准谐振开关电源的实际电路，该电源控制电路的性能十分稳定可靠，效率很高。     

基于MC74型电路的无线数字温度传感器

MC74型串行数字温度传感器具有价格低、精度高、串行线性输出等优点.介绍该电路的主要工作特性及工作原理,给出利用MC74设计的无线数字温度传感器电路的原理及部分程序代码.     

基于载波干涉扩频码的MC-CDMA系统建模

针对复信号高阶调制的系统分析及模型,将只适用于BPSK的系统模型进行扩展,建立了复信号高阶调制系统模型.并对系统用户间干扰概率分步及其性能影响进行了分析和仿真。研究表明:在复信号高阶调制状况下,系统无法正确解调;但对于单个用户,删除干涉码组干扰最强的2个用户后能够通过一定纠错编码正确解调。     

Hierarchical simulation approach to structure and dynamics of polymers

Many different theoretical and simulation techniques are available for studying the properties of polymer systems, over a wide range of length and time scales. Recent progress has seen a major improvement in the links between the different scales. Thus quantitative and rigorous connections between molecular structure and bulk properties for microstructurally complex materials could soon become a reality.     

差压式流量测量系统

文章提出了差压流量测量系统方案，重点介绍了差压式流量测量系统的各个组成部分，对将流量Q转换为与之成线形关系的数字输出也进行了详细的公式推导。该系统结构简单，对测量出流体的流量有着方便、可靠性高、测量精度准确的特点，可广泛应用于多种领域的流量测量。     

MC145151在调制器伴音电路中的应用与典型故障

简要介绍MC145151的工作原理,分析它在某电视调制器伴音电路中的实际应用,并介绍该电路一种典型故障的维修方法.     

HD460大型工程自卸车速度控制计算机总成-硬件的构成

速度控制计算机总成是汽车速度控制的核心部件。对日本KOMATSU(小松)公司 HD460大型工程汽车速度控制计算机系统的硬件构成进行了分析解剖,以便此于类机械的修理,以 解生产之需。