冶金机械设备齿轮减速器的润滑

阐述了冶金设备齿轮减速器润滑问题的重要性，分析了齿轮润滑的主要状态和润滑对齿轮传动的影响，简述了冶金设备齿轮减速机的工作特点及对润滑油性能的要求和选用。     

牵引一制动型液力变矩器原始特性研究

 基于束流理论建立了牵引一制动型液力变矩器原始特性参数计算数学模型．对以D430型液力变矩器为原
型设计的牵引一制动型液力变矩器进行了原始特性参数计算，并将计算结果同D430型液力变矩器原始特性参数进
行了比较分析，结论合理． 对设计牵引一制动型液力变矩器具有一定的指导意义．     

浅谈有线电视系统增补频道

有线电视系统采用大量的增补频道,结合实际应用分析增补频道的使用情况,介绍增补频道在有线电视系统传输频带中的划分和范围,以及新老型号电视接收机增补频道的设置情况,详细阐述利用老型号电视接收机接收增补频道节目的方法。     

网络电视的发展及其对远程教育的影响

计算机网络技术的发展给电视节目的播出方式带来了巨大的变化，网络电视这一传播媒体应运而生。从而改变了目前广播电视媒体信息单向传播的缺陷。介绍了网络电视的发展，就网络电视对远程教育的影响进行了探讨。     

鸡东县广播电视HFC城网改造设计方案

根据有线电视的数字化、光纤化发展趋势，现在的有线电视网络必须经过改造，以便为今后数字电视的传输和双向传输打下基础，进一步拓展有线电视的功能，为此提供一个城网改造的方案供参考。     

L-CKM 220开式齿轮油的研制

通过对基础油，增粘剂、降凝剂和其它添加剂的筛选，确定了L-CKM220开式齿轮油的配方，参照AGMA 251．02 EP极压开式齿轮油规范，制定了L-CKM220开式齿轮油的暂定质量标准，产品经应用试验表明：能满足开式齿轮的润滑要求。     

基于通信信道的视频传输系统的设计

提出了一种利用PCM基群信道进行视频信号传输的方法,介绍了传输系统的工作原理,对视频编码器进行了较为详细的分析,并采用数字信号处理器作控制器,实现了视频信号的实时传输。     

On Striping Traffic over Multiple IEEE 802.11(b) Wireless Channels

Due to interference, path loss, multipath fading, background noise, and many other factors, wireless communication normally cannot provide a wireless link with both a high data rate and a long transmission range. To address this problem, striping network traffic in parallel over multiple lower-data-rate but longer-transmission-range wireless channels may be used. In this paper, we propose a new striping method and evaluate its performances over multiple IEEE 802.11(b) channels under various conditions. Our extensive simulation results show that this method is quite effective for such an application. S.Y. Wang is an Associate Professor of the Department of Computer Science and Information Engineering at National Chiao Tung University, Taiwan. He received his Master and Ph.D. degree in computer science from Harvard University in 1997 and 1999, respectively. His research interests include wireless networks, Internet technologies, network simulations, and operating systems. He is the author of the NCTUns 2.0 network simulator and emulator, which is being widely used by network and communication researchers. More information about the tool is available at http://NSL.csie.nctu.edu.tw/nctuns.html. C.H. Hwang received his master degree in computer science from NCTU in 2002 and currently is working for a network company. C.L. Chou currently is a third-year Ph.D. student at the Department of Computer Science and Information Engineering, National Chiao TungUniversity (NCTU), Taiwan. He received his master degree in computer science from NCTU in 2002.     

无线网络中TCP与Ipsec的兼容性研究

针对有线网络设计的传输控制协议(TCP),在应用到无线环境中时存在许多不兼容问题,必须对TCP进行修改.目前人们提出了几种对TCP协议在无线网络环境下的改进方案,但是这些改进方案同IP安全协议(IPsec)存在一定的中突.文章分析了IPsec与TCP的改进方案之间的冲突问题,给出了4种解决方案:用传输层安全协议/安全套接层协议(TLS/SSL)代替IPsec、扩展封装安全载荷(ESP)协议、对TCP路径分段和修改IPsec的端到端保护模式,并分析了各方案的优缺点.     

蜗杆副的跑合工艺

叙述了蜗杆副跑合的目的、作用以及跑合过程的特点和跑合中应重视的几个问题。