抽取

Methods:① Using simple randomized principia, 1754 people of K-nationality and H-nationality aged ≥30 years from August 2004 to August 2005 in four town, Antu and Tumen of Yanbian were selected. The original area and national proportion of people brought into were close, and they knew and agreed the surveying matters.

①于2004年8月～2005年8月期间，在延边地区图们市和安图县4个镇内采取单纯随机原则抽取≥30岁朝鲜族和汉族人群1754人，纳入对象的来源地区民族比例相近，且对调查内容均知情同意。

Methods The clinical symptoms of 148 cases with rotary abortion were observed routinely and compared with that of the approximate number of cases selected randomly with suction abortion.

按照人工流产的常规对施行旋动式流产的148例情况进行总结，并与随机抽取的近似数量的负压吸引人工流产做简单的对比分析。

This new technique of bile extraction in violation of the bears of China's existing aquaculture regulations.

这种新的胆汁抽取技术违反了中国现有的熊类养殖业的法规。

Afew hundred million gallons of water will also be pumped out of the local aquifer each year.

每年将有几个亿加仑的水从当地的地下蓄水层抽取上来。

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。

Operating the routine test in terms of appearance, heat and asepsis for the blood percolating white cell by different percolator respectively.

分别对不同过滤器过滤白细胞的血液作常规外观、热源及无菌试验质控，并随机抽取902名接受输血的病人进行观察。

It was Shown that the recovery of their social function was closely associated with the following factors.

本文回顾十年来泉州市区285名精神分裂症患者的社会功能缺陷情况，随机抽取141例进行调查评定，与患者和家属的见面率达100％。

Using high-speed ADC front-end to cover a given monitor bandwidth, carrier frequency at a rough estimate and considering some of the protection zone, use less uniform bandpass sampling theorem interpolation line drawn in order to get the signal after subsampling.

详细说明：利用前端高速ADC来覆盖给定的监视带宽，在粗略估计载频并考虑一定的保护带，利用带通信号的均匀欠采样定理行内插抽取，以获得欠采样后的信号。

In this paper we study the text preprocessing and automatic rule acquisition technology for information extraction.

本文对信息抽取中的文本预处理和规则的自动学习技术进行了研究。

Methods Whole group sampling method was adopted, 840 aged 30~70 years residents were investigated in Tongliao, including investigations of questionnaire research, measure stature, avoirdupois, blood pressure, pulse etc.

采用整群随机抽样的方法，抽取年龄在30~70岁居民840人进行调查，包括问卷调查、测身高、体重、血压、脉搏等，对其结果进行流行病学分析。

In the United States, chronic alcoholism and hepatitis C are the most common ones.

在美国，慢性酒精中毒，肝炎是最常见的。

If you have any questions, you can contact me anytime.

如果有任何问题，你可以随时联系我。