前言：目的：实现心音信号提取。
Objective: To detect and analyze the heart vibration signal.
本文主要以一阶环为例讨论位同步信号提取。
This paper discusses extraction of the bit-synchronous signal with a first-order ADPLL mainly.
形态信号提取，用一个函数代表产品形态轮廓信息；
The second step is to abstract shape signal, which uses a function to express product form information.
盲信号提取主要研究如何把源信号逐个从观察信号中提取出来。
Blind signal extraction researches mainly on how to extract the source signal sequentially from the mixed signals.
谢尔兹博士所做的就是找出法子降低噪音，从而将信号提取出来。
What Dr Shields did was to work out a way of subtracting the noise, and thus extracting the signal.
介绍了混频技术的原理及其在超高频局部放电信号提取中的应用。
The principles of frequency mixing technique and its application to detect PD signals at ultra high frequency (UHF) are introduced in this paper.
一般来说，盲信号分离包括盲信号并行分离和盲信号提取两种方法。
Generally, classical BSS methods include Blind source parallel separation and Blind source extract.
它减少了波形失真度和平均叠加次数，提高了生物医学信号提取水平。
Extraction level of biomedical signals is improved by reducing wave distortion and average superposition times.
介绍了圆锥扫描红外导引头幅值信号提取和时间信号提取的两种方法。
Two ways of getting signal from Circular-cone scan infrared homing head are given, one is getting signal form range another is getting from time.
这项工作为随机共振理论应用于实际工程现场的弱信号提取提供了基础。
The job provide a foundation for the practical applying on detecting weak signals.
提出了对称补偿降噪以及利用希尔伯特变换方法进行降噪和特征信号提取。
An improved monitoring method is proposed. "Reducing noise with symmetry decomposition" is used to reduce noise and Hilbert transformation is used to extract characteristic signals.
并结合调制信号的恒模特性，提出了基于广义峭度的恒模盲信号提取算法。
Jointed the constant module (CM) character of digital modulated signal, the CM generalized kurtosis algorithm is deduced.
经过限幅保护，接收放大，检波和带通滤波后，将多普勒频移信号提取出来。
Then after amplitude limiting, to be preamplified, demodulated, bandpass filtered, the doppler frequency shift signal is extracted.
提出一种基于经验模态分解（EMD）的水轮发电机组局部放电信号提取方法。
This paper investigates a new method of extracting partial discharge signals of hydroelectric generating set based on empirical mode decomposition (EMD).
针对火灾探测过程中的光电探测器输出的微弱信号设计了一个微变信号提取放大电路。
A new circuit has been designed and developed for picking up and amplifying the weak signals of a photoelectric detector in fire detecting system.
设计出实验圆柱，并对微脉动信号提取中的应变片粘贴，应变仪调试等技术做了研究；
Design the cylinders, do the researches on pasting the strain gauge and debugging the instruments;
工程应用测试表明，设计的放大器用于胎儿心电信号提取时，可以提取出清晰胎儿心电。
Engineering application tests show that clear fetal ECG image can be obtained for fetal ECG extraction by using this amplifier.
研究了盲信号分离的对比函数理论和优化算法理论，着重研究了盲信号提取理论及其算法。
The contrast function theory and the optimal algorithm theory are investigated. The Blind source extract theory and algorithm are also investigated emphatically.
提出了应用差动放大理论和灵敏度不同的传感器来完成强噪声环境下微弱声信号提取的方法。
A method of sound detection under strong noise conditions is advanced applying the theory of differential amplifier and utilizing transducers having different sensitivities.
并针对点钞速度给出了信号提取滤波器通频带的计算方法，以及在带内分离强干扰的实用电路。
In the paper, the calculating method of signal extraction filter pass-band according to the paper-counting speed and the utility circuit of separating strong interference in pass-band are given.
采用合适的分析算法，把真正的BOLD信号提取出来；并以直观精确的形式把结果呈献出来。
The analysis approach based proper algorithm extracts the real BOLD information from functional MRI data, which make the representation of brain map be better as result.
第三章揭示了基于扩频信号的自适应阵的参考信号建立过程，提出了参考信号提取的改进措施。
Chapter 3 reveals the procedure of reference signal generating of adaptive array in spread spectrum system, and presents some improved methods of reference signal generation.
本文根据突发式数字通信快速锁相要求，提出一种位同步信号提取的新的快速全数字锁相环方案。
This paper presents a new type of all digital phase-locked loop(ADPLL)used for extracting a bit-synchronous signal to meet the requirements of the fast phase-locked in burst digital communication.
现有的体表胃电信号提取方法是令病人取仰卧位，在胃的体表投影区放置若干电极获取胃电信号。
The present methods acquiring electrogastric signals from the surface of the abdomen is that the patient lies down in the supine position.
从特征信号提取的角度出发，采用局域波时频分析和信息熵结合的方法进行往复式压缩机故障诊断。
In the view of feature signal extraction, the local wave time-frequency analysis and information entropy were used to deal with fault diagnosis.
将单光子探测器的研制分为偏置电压、前置放大、雪崩信号提取、温度控制和数字控制电路五个模块。
The SPD R&D includes five modules: SPD bias voltage, pre-amplification, avalanche signal extraction, temperature control and digital control circuit.
鉴于煤矿开采过程中，背景噪声相当复杂且多变，如何能将有效的AE信号提取出来是一个关键问题。
In view of complex and changeable background noise in coal mines exploitation, the key question is how to extract the effective AE signal.
将此滤波器应用于复杂噪音背景的话音信号提取，能很好地抑制背景噪声，从而获得清晰的话音信号。
This filter can effectively restrain background noise and acquire clear speech signal when applied in speech signal pick-up from the background with complex noise.
信号预处理系统还包括温度信号提取电路，通过铂热敏电阻实现对温度信号的提取，采用了三线制恒流源测量法。
The signal pre-processing system also has circuit to extract temperature signal via platinum thermistance, in which three-wire system and constant current measurement method are adopted.
阐述了激光扫描系统的工作原理、信号提取过程中的信号转换及数字信号处理方法，并对客观评价的可行性进行了验证。
The operating principle of laser scanning system, signal conversion and processing method during signal extracting process are described. The feasibility for objective evaluation is demonstrated.
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