Vision

在无线通信中使用跳频技术是军事通信中最主要的抗干扰手段之一, 而如果系统中能使用合适的中心频率可以快速跟踪跳频变化的带通滤波器将可以明显改善系统的抗干扰性能。文中从实际应用出发, 比较了几种可用于实现带通滤波器快速变频的方案, 选择了简单、实用的开关电容阵改变带通滤波器中心频率的方案-The use of frequency hopping in wireless communication technology is the most important anti-jamming in military communications, one of the means, and if the system can use the appropriate center frequency can be fast-tracked changes in frequency-hopping band-pass filter will be able to significantly improve the system anti-jamming性能. This paper from the actual application, the comparison of several band-pass filter can be used to achieve the rapid conversion of the program, choose a simple, practical switched capacitor array to change the center frequency of band-pass filter program

通过对数学模型的分析建 立了无刷直流电机仿真模型，用双闭环控制进行了仿真，验证了模型的可行性 -Through the analysis of mathematical models to establish simulation model of brushless DC motor, with double-loop control of the simulation to verify the feasibility of the model

FPGA实现FIR抽取滤波器的设计　采用基于分布式思想的方法来设计FIR滤波器。-FPGA realization of FIR decimation filter design ideas based on a distributed approach to design FIR filters.

新型电脑针织横机选针器的工作原理及选型设计-New computer flat knitting machine needle selector of the working principle and selection of the design

相应的软件开发平台与硬件工具，并对ATmega128一些硬件接口在实际应用中的软/硬设计方法与技给出深入和细致的使用指南。 ... 转换器（8535）的使用，异、同步串口通信，软件DAA等；有的属于对传统程序的优化，如对简易键盘LED显示管理，精确定时及-corresponding software development platform and hardware tools, and hardware interface ATmega128 some of the practical application of software/hardware design and technology is in-depth and detailed guidelines for their use. ... Converter (8535), the use of different, synchronous serial communications, software DAA; Some belong to the traditional procedure of optimization, such as the simple keyboard LED display management, precision timing and

基于校园网的视频点播系统的设计与实现 硕士学位论文-Based on Campus Network VOD System Design and Implementation of a master

并口的接口规范，对开发并口驱动的同行很有用。-Parallel Port Interface Specification, on the development of parallel drive counterparts useful.

哈夫曼树中,树的带权路径长度的含义是各个字符的码长与其出现的此时的乘积和, 也就是电文的代码总长,所以采用哈夫曼树构造的编码是一种能使电文代码总长最短的 不等长编码。-Huffman tree. tree with the right path length is the meaning of the various characters code length of time with the product and, is the message code chief Therefore, the tree structure used Huffman coding can be a code message from the chief of the shortest length coding.

ST公司的直流无刷无传感电机控制方案介绍-ST

JAVA编写的SOCKET通信 客户端案