查询词典 describes

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。

The paper describes a method of speed estimation using armature voltage and current measurements that eliminates the speed measuring device.

本文介绍了一种利用测量电枢电压和电流代替速度检测装置的速度估测方法。

This paper describes a method for the determination of polycyclic aromatic hydrocarbons in soil of green food producing area .

对绿色食品产地土壤中多环芳烃的气相色谱质谱联用分析法进行了研究。

Roberts describes how ARPA supported university research had a significant impact on the computer industry as well.

Roberts又描述了ARPA支持的大学研究项目如何对电脑工业起重要影响。

Articulatory —describes the way our speech organs work to produce the speech sounds and how they differ.

发音语音学描述了我们的发音器官如何发出语音，以及这些语音为何有所不同。

The paper describes the differences between the way of traditional casting and the technology of manufacturing rapid soft tooling in the manufacture of artware s.

介绍了用传统的铸造方法和快速软模制造技术制作工艺品的区别，实际证明用硅橡胶软模具制作工艺品复印性好，脱模方便，制品表面光洁，是制作工艺品的好方法

It also describes the improvements that have been made in aseptic process validation and control.

本文描述了80年代后期产生的新技术和传统技术的改良，以及无菌工艺验证和控制所取得的进步。

This section describes the use of assembly-language features in __asm blocks.

这部分内容描述了在__asm块中使用汇编语言特性。

Paul Lucas, a medieval writer and traveller, describes meeting Asmodeus during one of his journeys through Egypt.

保罗卢卡斯，中世纪作家和旅行者，形容会议asmodeus在他的旅途通过埃及。

This book describes a comprehensive and meticulous assembly language program design aspects.

详细说明：本书全面细致地讲述了汇编语言程序设计的各个方面。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。