采样过程

DRFM采样过程的频谱分析及仿真

Analysis and Emulation of Spectrum in Sampling Process of DRFM

通过对CCD采样过程的分析，说明了输入信号与CCD像元位相匹配对调制传递函数（MTF）有影响。

That the phase match between input signal and CCD pixel has influence on the measuring results of MTF is showed by the analysis of the CCD sampling process .

考虑到采样过程中，泵流量不稳定会对测量结果造成影响，本文设计通过PID算法来对采样进行恒流控制。

In view of the instability of pump possibly affect the measurement results in airborne radioactive sampling process , PID algorithm is used to keep flow constantly .

另外，在心电信号采样过程中采用了图像处理的方法，实现了一定频率的数据采样；并且利用阈值法对R波进行准确定位，从而保证了波形数据的准确性和可靠性。

In addition , in order to make the acquisition of wave data , image processing method and the threshold approach are given to resolve data sampling and detect R wave .

信号处理中，采样过程必须满足Nyquist采样定理。

In the signal processing , Nyquist sampling theorem must be satisfied in the sampling process .

利用自制的CCD调制传递函数测量系统，记录了线阵CCD在对频率可连续变化的正弦光栅图样采样过程中，发生的混频现象。

We have recorded the aliasing phenomenon using the measurement system of modulation transfer function of CCD equipped by ourselves , which occurs during measuring of the model TCD linear CCD with the frequencies variable sine grating pattern .

通过分析发现，由于弧形触点特殊结构的影响，在对缺陷回波采样过程中叠加的表面回波分量在C扫描图像中形成了不均匀分布的图像背景，这是影响C扫描图像质量的主要原因。

It is found that the superposition of surface echo on the defect echo during the sampling process , which is caused by the special structure of arc surface contact , results in the non-uniform background in C-scan image . That is the key reason influencing the C-scan image quality .

信号采样过程中的栅栏效应会引起一定的误差，在高精度采样时，必须要考虑这个问题。

The Picket Fence Effect will influence the sampling result .

关于环境空气连续采样过程影响因素的探讨

Discussion on Influence in the Course of Continuous Atmospheric Sampling

传统的采样过程也对硬件设备的采样速率提出了更高的要求。

Meanwhile , traditional sampling technology requires a higher sampling rate of hardware devices .

空气质量周报二氧化硫采样过程影响因素的探讨

Discussion about factors effecting the air quality weekly report on the course of collecting SO_2

基于因特网的运动控制系统中变采样过程的研究

Variable-sampling Process in Internet-based Motion Control System

结果表明，这种算法准确、可靠，并且可以有效克服采样过程中常常出现的噪声对信号的干扰。

It can also overcome the noise disturbance to the signal during the sampling process .

传统连续图像信号的采样过程采用的是矩形点阵结构。

Traditionally , the most commonly used sampling lattice in image processing systems is the rectangular sampling lattice .

该方法将最新观测值融合到采样过程中，并对采样过程利用粒子群优化算法进行优化。

Particle swarm optimized particle filter ( PSOPF ) incorporates the newest observations into sampling process and also optimizes it .

这是因为数字化测量的两个关键步骤就是信号采样过程和信号处理过程。

This is because the two key steps of digital measurement are the process of signal sampling and signal processing .

为了避免在采样过程中搅起沉积物质，瓶子不得接触水底。

The bottle should not be allowed to touch the bottom in the sampling to avoid stirring up the sediment .

正弦信号抽样的周期性与伪调制性。着重讨论连续信号采样过程中抽样定理对正弦信号的非整数抽样序列的周期性，伪调制性和调制周期的周期性。

Periodicity and pseudo-modulation when sampling sinusoidal Signals The periodicity and pseudo-modulation due to non-integral sampling of sinusoidal signal are analyzed .

另外，为了防止采样过程中的频谱混叠，在软件上采用了数字滤波的方法。

In addition , for the sake of avoiding frequency-band overlapping in sampling , a method of digital filter is introduced .

文章重点分析了实时采样过程中，由于采样造成的信号寄生调幅问题。

In this paper , the focal point is the analysis on the problem of spurious AM in the real time sampling .

同时，由于光线跟踪算法是一个典型的点采样过程，它所绘制的画面会出现严重的走样问题。

And owing to ray-tracing algorithm is a typical process of point sampling , serious aliasing problems appear in its rendering pictures .

在非同步采样过程中，信号周期的测量是周期信号数字化测量和分析的重要环节。

In the course of non-synchronization sampling , signal period measurement is an important step in digital measurement and analysis of periodic signal .

其次在分析了粒子滤波过程的基础上提出一些措施来优化抽样和重采样过程。

Secondly a number of measures to optimize the process of sampling and re-sampling are proposed based on analyzing the process of the particle filter .

其中采样过程利用传统绘制软件或光学仪器获取光波场的二维原始采样图像，并从原始采样图像序列中提取出相应的原始采样波前上的振幅和位相信息；

Firstly , the original wavefront samples are obtained in sampling step , by extracting the amplitude and phase information from a series of images .

本文对浅层月壤采样过程进行了动态仿真与机土耦合作用分析，所得结果可对今后的采样方式设计与采样机构优化设计等方面提供理论参考，且具有一定的工程应用价值。

The results can provide theoretical reference to the future sampling method design and institution optimization design , and is of certain value for engineering application .

新型海底沉积物采样器结构设计及采样过程动态分析预乘式多采样率有限冲激响应滤波器的原理与设计

The Structural Design and Dynamic Analysis of Collecting Process of New Type Seabed Sampler The Principle and the Design of Multirate FIR Filters with Premultiplication Scheme

对大气二氧化硫连续自动采样过程中的导气管吸附、样品的放置时间、吸收液的放置时间、采样高度等方面进行了试验。

The test result shows absorption of air pipe with automatic monitoring sampling is main reasons causing lower value than that of the five days sampling method do .

为了优化体绘制算法的关键步骤&重采样过程，本文提出并实现了一种通过两重查找法进行重采样的新型物序体绘制方法。

Fourth , in order to optimize a key process of volume rendering : the resampling process , a new object-order volume rendering algorithm is proposed in this paper .

而信号采样过程受到奈奎斯特采样定理的限制，它要求采样率必须大于输入信号频率的2倍以上。

The signal sampling process is restricted by the Nyquist sampling theorem , which requires that the sampling rate must be 2 times greater than the input signal frequency .

同时在重采样过程中引入了过收敛检验与均匀性检验用于判断采样与感知信息的匹配程度，以适时进行重采样，节省了计算资源并提高了定位效率。

The over-convergence and uniformity validations are introduced to verify correspondence between sample distribution and sensor information for timely resampling which highly saves computational resource and enhances localization efficiency .