硬件实现的

Firstly it describes the development ,basic principle and application and propagation characteristic of mobile channel , then investigates the system structure of DAB transmitter and receiver separately and the key technology of realization of the digital audio broadcast system.And then discusses the system component of FFT －the demodulation module of OFDM .The 409- points FFT module employs a radix-4 decimation-in-frequency algorithm, includes arithmetic element , read and write address element ,twiddle factor element and control element , is realized by FPGA. In the end , the result is verified in the matlab .

首先概述了OFDM的发展、基本原理和应用以及移动信道的传播特性，接着分别研究了数字音频广播接收机和发射机的系统结构，以及数字音频广播系统实现的关键技术，然后详细论述了OFDM解调模块FFT的系统结构，主要研究了4096点FFT采用基－4按频率抽取实现的算法，整个FFT模块包括了运算单元、读写地址单元、旋转因子单元以及控制单元，并且在FPGA中进行了硬件实现，并在matlab环境下对结果进行了验证。

A technique based on lifting scheme is presented to construct the compactly supported wavelets whose coefficients are composed of a free variable. When t=1, the integer wavelets based on lifting scheme only use integral addition and shift, so it's fast and easily realized via hardware.

在理论上，基于提升理论构造了一种包含自由变量t的紧支撑小波，选取参数t=1的9/7整数小波基，只需要整数加法和移位实现，运算量低，便于硬件实现。

Voice and realized the software and hardware of the interface between the modem to achieve the operation.

本程序是语音电话，实现了软件和硬件之间的接口，实现对MODEM的操作。

The arithmetic is presented to solve the transformation between screen coordinate and world coordinate,which uses the prospective image arithmetic and Z-Depth buffer of OpenGL,and is suitable for many occasion.

OpenGL是作为一种新型的接口，它所具有的与硬件无关的特性，可以使其在不同的硬件平台实现，被多种操作系统平台支持，简单实用，并且可以在微机工作站上使用，却并不损失三维图形的性能。

Consequently a hardware implementation scheme of the whole system and all modules are proposed. Furthermore, the key implemental methods are presented in detail.

在此基础上，进而提出整个系统和各模块的硬件实现方案，给出关键问题的具体实现过程。

Consequently we introduce the design of light route and at the same time analyse the performance of optical system.

还介绍了测量信号的软、硬件实现，分析了测量精度要求的分析实现。

Adopting uniform layout and information exchange standard to ensure that all of the development department can effectively share the information resource during the battleplan development can lead to the informatization of aviatic industrial corporation a...

本文从研究国内外军机研制部门在实现信息资源共享领域的应用现状着手，详细探讨了美国国防部在推出CALS战略体系时的实施经验和相关核心技术，在进一步完善现有软、硬件设施的基础上探讨了我军军机研制中实现有效信息资源共享集成系统的概念模型，为统一规划和建设适应我国军机研制的信息资源共享环境提供了参考，争取在下一代军机研制牛能够实现满意的信息资源共享水平。

This paper briefly introduced the development phases of software dog, expatiated on the software dog's software and hardware principles, and analyzed the sameness and difference between software dog and encrypted information. Based on the particular introduction of the inner architecture of CY7C68013 chip which belongs to Cypress corporations EZ-USB FX2 series, the paper gave the hardware implementation of software dog, presented the program flow chart of software dog, and introduced the making process of both driving program and super application program.

简单介绍了软件加密狗的几个发展阶段，具体说明了加密狗的软、硬件原理，并分析了软件加密狗与信息加密的异同，详细介绍了Cypress公司EZ-USB FX2系列CY7C68013芯片的内部结构，并给出了基于此芯片的加密狗的硬件实现，给出加密狗内软件程序流程图，并简要介绍了驱动程序和高级应用程序的制作。

The selection principle of bus interface chip and solution of bus conflict are introduced,together with its concrete hardware cir- cuits and software block chart are given.

分析了总线接口芯片选择原则和总线冲突解决方案，给出了系统实现的硬件接口电路和软件实现详细框图。

This thesis analyses the hardware of system, and popular and low-cost PC桪AQ structure is chosen .

在系统的开发过程中，对系统硬件进行了详细的分析，采用普及廉价的PC—DAQ体系结构作为本系统的硬件实现方案。

Cynanchum Lingtai apricot production in the average weight 65 grams, the brightly-colored fruit, juicy rich, sweet-sour taste, sweet from the nucleolus, when the late Qing Dynasty famous Shaanxi, Gansu provinces, the Qing imperial court Tongzhi tribute for years.

灵台生产的牛心杏平均单果重65克，果实色泽鲜艳，汁多味浓，甜酸适口，离核仁甜，清末时就驰名陕、甘两省，清同治年间曾为朝廷贡品。

Chenopodium album,Solanum nigrum, and Amaranthus retroflexus were very susceptible to the herbicides. Polygonum persicaria and Abutilon theophrasti were relatively less susceptible to the herbicides, and Lycopersicon esculentum was not susceptible to it. The relationship between reduction rates of weed biomass and PPM values of weed leaves 2,4, and 6 days after treatment was established.

供试的6种杂草对该混剂的敏感性存在显著差异：红心藜Chenopodium album、龙葵Solanum nigrum和反枝苋Amaranthus retroflexus对该混剂最敏感，ED90值分别为47.65、71.67和29.17g/hm2；春蓼Polygonum persicaria和苘麻Abutilon theophrasti敏感，ED90值分别为96.91、114.20g/hm2；而番茄不敏感。