A large scale screen for genes (3rd chromosome) related to Wingless signaling pathway

INTRODUCTION The Wingless (Wg) signal transduction path-way is an essential pathway in animal development (Wodarz and Nusse, 1998; Siegfried and Perrimon, 1994). The Wg signaling pathway is evolutionarily conserved and involved in numerous developmental processes in both Drosophila and vertebrates. Ho-mologs of both Wg and their signaling components have been identified in vertebrates. The powerful genetics of Drosophila melanogaster provides great opportunity for dissecting the comp…     

高速电路板设计的信号完整性分析

基于微电子技术的不断发展,高速器件的使用和高速数字系统设计越来越多,系统数据速率、时钟速率和电路密集度都在不断增加.信号完整性分析的应用已经成为解决高速电路板设计的一个有效途径.介绍了高速电路板设计中信号完整性(SI)的定义、所要解决的主要问题、解决问题的基本方法和信号完整性分析模型.     

大厦与电气接地

通过对几种低压配电接地型式的比较、分析,提出适合大厦的低压配电系统的接地型式及建筑物的共用接地装置和等电位连接的措施与设计方法。     

印制电路板的电磁兼容问题研究

主要介绍了在设计印制电路板时需要考虑的电磁兼容问题，并说明产生问题的原因。     

辅助信号在田径教学中的应用

根据运动技能形成的生理学机制,阐述了辅助信号在技能学习中的作用,提出了田径教学中辅助信号的分类、运用与注意事项.     

“数字信号处理”教学改革初探

“数字信号处理”课程具有理论性强、难学、枯燥等公认的特点．在教学过程中对教学内容和方法进行了改革与实践，在授课内容上注重更新和应用性，在方法上提高趣味性、参与性和主动性，取得了较好的效果．     

“信号与系统”课程教学改革与实践探索

针对“信号与系统”的课程地位、教材、学生的特点，结合建设“省级电工电子实验教学示范中心”的实施过程，从教学内容、实验体系、教学手段等方面进行了实践和探索；加强理论与实践教学相结合，突出工程意识，努力提高学生灵活应用所学知识分析问题、解决问题的能力．     

基于无线传感器网络的混合型道路快速公交信号优先系统设计与应用

针对混合型道路公交车辆信号控制问题,综合采用微波、RFID,ZigBee和北斗卫星导航系统等多种传感技术构建公交沿线无线传感器网络,实现对交通运行参数监测、BRT车辆准确定位和无线通讯功能,通过车辆设备与信号机间的信息交互,实现了信号的优先控制,提高了公交的运行速度。     

Digital Signal Processing Based Real Time Vehicular Detection System

Traffic monitoring is of major importance for enforcing traffic management policies. To accomplish this task, the detection of vehicle can be achieved by exploiting image analysis techniques. In this paper, a solution is presented to obtain various traffic parameters through vehicular video detection system( VVDS). VVDS exploits the algorithm based on virtual loops to detect moving vehicle in real time. This algorithm uses the background differencing method, and vehicles can be detected through luminance difference of pixels between background image and current image. Furthermore a novel technology named as spatio-temporal image sequences analysis is applied to background differencing to improve detection accuracy. Then a hardware implementation of a digital signal processing (DSP) based board is described in detail and the board can simultaneously process fourchannel video from different cameras. The benefit of usage of DSP is that images of a roadway can be processed at frame rate due to DSP‘s high performance. In the end, VVDS is tested on realworld scenes and experiment results show that the system is both fast and robust to the surveillance of transportation.     

《数字信号处理》课程教学方法探索

数字信号处理是近30年快速发展起来的科学和工程领域,“数字信号处理”课程是电子信息类专业非常重要的课程,但它理论性强、抽象、公式多,理解和掌握起来有一定难度,导致学生厌学、怕学的情绪,针对这种情况,我们在教学过程中对课程的教学方法进行的改革与探索并总结了一些有成效的举措和经验,供同行探讨。