异步电机控制系统（变频调速）频率测量的基本方法…

How to build First-Generation Wireless USB Devices-First-Generation Wireless U.S. B Devices

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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

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本文介绍一种以CPLD[1]为核心、以VHDL[2]为开发工具的时间控制器，该控制器不仅具有时间功能，而且具有定时器功能，能在00：00～23：59之间任意设定开启时间和关闭时间，其设置方便、灵活，广泛应用于路灯、广告灯箱、霓虹灯等处的定时控制。-This article describes a CPLD [1] as the core, VHDL [2] for the development of tools for time controller that features not only has the time, but with the timer function, can be between 00:00 ~ 23:59 arbitrarily set to open time and closing time, and its convenient, flexible, widely used in street lamps, advertising light boxes, neon lights, etc. The timing control.

基于Linux防火墙的嵌入式网络流量控制系统，可供学习linux的人员参考。-Linux-based embedded firewall network traffic control system, learning linux for the reference.

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这是一个介绍PCI硬件底层驱动程序的编写方法文档。介绍了一些底层驱动函数的使用方法-This is a PCI hardware on the bottom of the Driver compilation of documents. On the bottom of some drivers use the function

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JPEG 2000 supports lossy and lossless compression of single-component and multi-component imagery.In addition to this basic compression functionality, however, numerousother features are provided, including: progressive recovery of an image by fidelity or resolution region-of-interest coding, whereby different parts of an image can be coded with differing fidelity random access to specific regions of an image.-JPEG 2000 supports lossy and lossless compression of single-component and multi-component imagery.In addition to this basic compression functionality, however, numerousother features are provided, including: progressive recovery of an image by fidelity or resolution region-of-interest coding, whereby different parts of an image can be coded with differing fidelity random access to specific regions of an image.