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中国某电信公司电子商务平台分为两层：支撑层和业务层，支撑层为电子商务业务的开展提供支撑功能，包括认证系统、支付系统、移动终端安全系统以及整个电子商务业务的计费和结算系统；业务层包括各种具体的电子商务业务以及为各种业务提供公共服务功能的业务平台。-a Chinese telecommunications company e-commerce platform is divided into two tiers : the supporting layer and the business layer, layer support for the development of e-commerce to provide business support functions, including authentication systems, payment systems, mobile terminals and security systems throughout the e-commerce business billing and settlement systems; Layer including business specific business and e-commerce operations for the full range of public services business platform.

< AVR_U盘嵌入式FAT文件系统> 文件介绍了AVR Memory Stick嵌入式中实现类似操作系统的FAT文件管理系统，这些内容主要包括，文件系统的命名规范，文件寻址路径规范，文件系统核心数据结构的定义，文件系统读写类函数原型的定义。- document describes embedded AVR Memory Stick to achieve a similar operating system FAT file management systems, which mainly include the file system naming convention, document addressing the path specification, file system core data structure the definition of the file system functions to read and write the definition of the prototype.

在电子技术中，频率是最基本的参数之一，又与许多电参量的测量方案、测量结果都有十分密切的关系，因此频率的测量就显得更为重要。测量频率的方法有多种,其中电子计数器测量频率具有精度高、使用方便、测量迅速，以及便于实现测量过程自动化等优点，是频率测量的重要手段之一。在本次毕业设计中我们选择使用单片机来制作数字频率计，并在实际制作中采用了直接测频法。利用延时产生的时基门控信号来控制闸门，通过在单位时间内计数器记录下的脉冲个数计算出输入信号的频率，最终送入LCD中显示。这样制作出来的频率计不仅可以满足设计题目的参数要求，而且具有了单片机的稳定性和成熟性，且控制能力强，是一种低成本，高可靠的设计方案。-In electronic technology, the frequency is one of the most basic parameters, but also with a number of electrical parameters of the measurement program, the measurement results have a very close relationship between the frequency of measurement, therefore it is even more important. Measurement of the frequency of a number of means, electronic measurement of the frequency counter with high precision, easy to use, rapid measurement, and measurement is easy to realize the advantages of process automation is an important means of measuring the frequency of one. Graduates in this design we have chosen to make use of single-chip digital frequency meter, and used in the actual production of a direct

此文件是对两款can协议控制芯片的介绍并进行很好的比较。-C250251 TJA1040

学习掌握FAT 32 文件系统的必备资料，让你轻松掌握。-FAT 32 file system to learn to master the essential information to enable you to easily grasp.

蓝海微芯ARM开发板核心板原理图,采用s3c2410处理器-BlueOcean Chipscreen ARM development board core board schematic diagram, using S3C2410 processor

无线网络站点的设计，根据无线网络的传输规律，讨论了多种站点设计方案，最后找到最经济，最可靠的站点设计方法。-Wireless network site design, wireless network in accordance with the laws of the transmission to discuss a wide range of site design options, and finally to find the most economical and most reliable methods of site design.

基于专用运动控制芯片的开放式数控系统研究 -Special motion control chip based on Open CNC System

工资管理系统代码。利用面向对象的方法以及C++的编程思想来完成系统的设计。-Salary Management System code. The use of object-oriented methods and C++ Programming ideas to complete the system design.

电子版网络营销企划书internet版 pps格式,有用啊-Electronic version of the internet edition of the book Network Marketing Planning pps format, useful for ah