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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...
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
- 2022-10-28 01:20:03下载
- 积分：1
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本“网上考试系统”是为了配合网上教学，实现网络学校一体化而设计的。设计本系统要熟悉掌握数据库的编辑和应用，并能与网络相结合。
本“网上考试系统”是基于微软...
本“网上考试系统”是为了配合网上教学，实现网络学校一体化而设计的。设计本系统要熟悉掌握数据库的编辑和应用，并能与网络相结合。
本“网上考试系统”是基于微软的FrontPage和Access数据库来实现的。主要采用HTML语言来编写，设计过程中还应用到ASP语言。全文共分为系统分析、系统概述、设计过程、用户说明、 结束语、参考文献。本文详细阐述了系统分析、系统设计的方法及其内容，对如何使用ASP开发本系统作了较为详细的介绍。本系统以网页的方式对数据库进行调用，系统应用简单明了，考生可以轻松查看数据库，操作员也可以对数据库进行添加、删除、修改等操作。
关键词:网上考试系统，数据库，网页语言
-the "online examination system" is in line with the on-line teaching, the network integration of the school design. Design of the system to the mastery of the editing and database applications, and can combine with the network. The "online examination system" is based on Microsoft"s FrontPage and Access database to achieve. HTML language used mainly to prepare, the design process is also applied to the ASP language. There transcript analysis, the system outlined, design process, users that conclusion, references. The paper presents a systematic analysis, system design methods and their contents ASP on how to use the system was the development of a more detai
- 2023-02-01 11:25:03下载
- 积分：1
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实现快速的数据复制和磁盘运行，窗口
快捷实现数据复制和磁盘运行,window linux-Realize fast data replication and disk run, window linux
- 2022-01-27 16:19:53下载
- 积分：1
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wince下Windows+CE+SM501+STN的设计过程，很有用的，欢迎大家下载
wince下Windows+CE+SM501+STN的设计过程，很有用的，欢迎大家下载-wince under Windows+ CE+ SM501+ STN of the design process, useful, and welcome to download
- 2022-04-18 14:19:33下载
- 积分：1
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基于DSP的真空断路器机械特性测试系统硬件设计,我朋友的毕业设计论文...
基于DSP的真空断路器机械特性测试系统硬件设计,我朋友的毕业设计论文-DSP based on the mechanical properties of the vacuum circuit breaker test system hardware design, I designed a friend
- 2022-01-23 10:23:29下载
- 积分：1
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a document on synchronous machine power factor improvement...
a document on synchronous machine power factor improvement-a document on synchronous machine power factor improvement...
- 2022-07-13 12:35:06下载
- 积分：1
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DSP Architecture with Jumping
DSP Architecture with Jumping-Floating-Point
Number System
- 2022-08-20 04:26:20下载
- 积分：1
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基于嵌入式操作系统的无功补偿控制器设计 平台为UCOS
基于嵌入式操作系统的无功补偿控制器设计 平台为UCOS-II 加 TMS320LF2407。 版权归西北工业大学 及其作者。-Embedded operating system based on reactive power compensation controller design platform UCOS-II plus TMS320LF2407. Belongs to the Northwest Industrial University and the author.
- 2022-01-27 16:27:45下载
- 积分：1
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这一原理图和PCB Gerber文件是用于GSM报警系统。这一..
This schematic and Gerber files of PCB that is used for GSM alarm system. This is industrial-grade system with many features like 1-wire (iButton) interface, additional interface for video camera (UART JPEG camera is used), SD card to store pictures from camera and send them by GSM to remote mobile phone.
Can be used as a reference design for anyone who wants to make own GSM alarm system system based on SIM300C module from Simcom.-This is schematic and Gerber files of PCB that is used for GSM alarm system. This is industrial-grade system with many features like 1-wire (iButton) interface, additional interface for video camera (UART JPEG camera is used), SD card to store pictures from camera and send them by GSM to remote mobile phone.
Can be used as a reference design for anyone who wants to make own GSM alarm system system based on SIM300C module from Simcom.
- 2023-04-30 23:55:03下载
- 积分：1
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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...
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
- 2023-07-21 14:30:03下载
- 积分：1
