高频采样,high frequency sampling
1)high frequency sampling高频采样
1.The method ofhigh frequency sampling was discussed,and the design of monitoring and protection for hardware circuit by software was analyzed.给出了基于Internet的电力电子实验系统的框架和实现方法,对系统的控制功能、方案设计给予了详细的说明;介绍了系统客户端功能界面的设计以及控制端的实现;讨论了高频采样的方法;并分析了通过软件对现场的硬件电路状态进行监控和保护的设计方案。
2)sampling frequency采样频率
1.Method for determination ofsampling frequency of routine monitoring of water quality;水质常规监测采样频率确定方法研究
2.Simulation of softwaresampling frequency adaptive algorithm for reducing spectrum leakage;一种减小频谱泄漏的采样频率自适应算法仿真研究
3.The effect of thesampling frequency on the time averaging characteristics of integrating sound level meter;采样频率对积分声级计时间平均特性影响的研究
英文短句/例句
1.A Method to Speed up Sampling Frequeny of AC6611 Multifunction Card提高AC6611多功能卡采样频率的一种方法
2.Choice of Signal IF and Sampling Frequency in Software Radio软件无线电中信号中频与采样频率选择
3.Design of an 8-Channel Audio Sampling Rate Converter and Its ASIC Implementation8通道音频采样频率转换器设计与ASIC实现
4.On the Treatment of Data Acquisition Sampling Frequency in Fiber Optic Sensor Controlling;光纤传感控制中数据采集采样频率处理分析
5.Sampling frequency and time constant of phase-locked amplifier were increased by using microcomputer.采用计算机采样，提高了采样频率和锁相放大器的时间常数。
6.Adaptive Sampling Frequency Method to Reduce Target-Losing Rate of WSN降低WSN目标失跟率的自适应采样频率方法
7.Influence of sampling frequency and sample size on turbulence statistics in open-channel flow measurements采样频率及样本容量对明渠紊流统计值的影响
8.The left ventricular pressure , femoral arterial blood pressure and the ECG wave form are digitized at a sampling rate of 500 Hz by a 12 bit A/D converter.籄/D转换器将LVP、BP、ECG信号数字化,采样频率为500Hz.
9.A 12bit 40MHz Pipeline Converter;12位40兆采样频率流水线结构模数转换器
10.Trapping stiffness measurement with brownian motion analysis method at low sampling frequency低频响及低采样频率下用布朗运动分析法测量光阱刚度
11.It can remove the interference of power supply more efficiently than the conventional one.该方案通过跟踪周期性干扰信号的频率变化,微调采样频率,改善了自适应模板法滤波性能。
12.Analysis of PSF and image sampling frequency and quantization precision on edge location点扩展函数与采样频率及量化精度对图像边缘的影响分析
13.Study on the Frequency of Sampling and the Controls Parameter of the Test System for Soil Adhesion Property;土壤粘附特性测试系统采样频率及控制参数的研究
14.Research and Realization of a Method to Measure Frequency for High Frequency Signal Dependent on Low Sample Rate低采样率下高频信号的测频方法的研究与实现
15.Methods of Signal Frequency Measurement and Implementation Based on Nonuniform Sampling;基于非均匀采样的信号频率检测方法及其实现
16.An Algorithm for Improving Spectra Resolution of Irregular Sampling Signals一种改进不规则采样信号频谱分辨率的算法
17.Implementation of Sampling Rate Conversion for Wideband Digital Down Conversion Based on FPGA宽带数字下变频的采样率变换模块的FPGA实现
18.Frequency sampling-based method to design UWB pulse shapes基于频率采样的超宽带脉冲信号设计方法
相关短句/例句
sampling frequency采样频率
1.Method for determination ofsampling frequency of routine monitoring of water quality;水质常规监测采样频率确定方法研究
2.Simulation of softwaresampling frequency adaptive algorithm for reducing spectrum leakage;一种减小频谱泄漏的采样频率自适应算法仿真研究
3.The effect of thesampling frequency on the time averaging characteristics of integrating sound level meter;采样频率对积分声级计时间平均特性影响的研究
3)fixed frequency sample恒频采样
1.Thefixed frequency sample PWM method is put forward in this paper together with the theoretical analysis about their switch strategy.本文提出恒频采样电流跟踪型ＰＷＭ方式，并对其开关策略进行了理论分析。
4)IF sampling中频采样
1.Design and Implementation of the sharp cutting-off filter forIF sampling锐截止中频采样滤波器的设计与实现
2.The technique ofIF sampling is used in a PD radar seeker system.对某PD雷达导引头中常用的一种中频采样技术进行了分析,对中频模拟接收机的输出信号进行欠采样,实现信号频谱的正交变换和等效下变频,但是实际采样频率与理论值存在一定的偏差,从而导致较大的镜频分量残余。
3.As a key technology in digital quadrature demodulation system,the directIF sampling filter with sharp cutting-off transition band can improve the performance of demodulation system.中频采样是数字正交鉴相系统中的一项关键技术,具有锐截止特性的中频采样滤波器可以改善鉴相系统的性能。
5)sample frequency采样频率
1.Influences ofsample frequency and delays on tracking system;采样频率、系统延迟对跟踪系统稳定性能的影响
2.The protect function can be achieved in the improvement ofsample frequency.在雷达伺服系统中采用全数字化技术时 ,控制计算的主要时间使用瓶颈就出现在采样延时上 ,提高了采样频率就提高了控制计算的速度 ,从而有利于各种保护功能的实现。
3.However,the synchronous change ofsample frequency and switching frequency makes the filter design complex,meanwhile the digital realization of engineering becomes difficult as the gain of controller and modulator vary with thesample frequency.随机开关频率脉宽调制方法在较宽频率范围可以获得均匀的频谱特性,但是由于数字化实现中采样周期同步随机变化,使得滤波器设计复杂,而且控制器的增益和调节器的设计需要随着采样频率的变化而变化,使得工程化实现困难。
6)frequency sampling频率采样
1.In this paper, the principle of high speed and high precisionfrequency sampling is presented.讨论了高速、高精度频率采样的基本原理;分析了量化噪声对测量误差的影响;提出了采样器建立和保持时间对测量误差影响的问题;导出了考虑采样器建立和保持时间后时间量化误差的概率密度函数,为量化误差的校正奠定了理论基础。
2.In thefrequency sampling method the value of transition band samples, which are usually obtained by consulting a table, must be determined in order to make the attenuation within the stopband maximal.频率采样技术是 FIR数字滤波器设计的常用方法之一。
3.This paper deduces the function of stopband attenuation on the order of filter and the sampled value of transition band,according to the features of designing FIR filters withfrequency sampling technique,and optimizes it with immune algorithm.针对频率采样技术设计FIR滤波器的特点,推导出阻带衰减关于滤波器阶数和过渡带采样值的优化函数,并具体设计了免疫算法对其优化求解。
延伸阅读
甚高频和超高频多普勒雷达工作在30～3000兆赫频段的气象多普勒雷达。一般具有很高的探测灵敏度。因探测高度范围可达1～100公里，所以又称为中层-平流层-对流层雷达 (MST radar)。它主要用于探测晴空大气的风、大气湍流和大气稳定度（见大气静力稳定度）等大气动力学参数的铅直分布。原理 这类雷达通过以下几类电磁波和大气的相互作用,对晴空大气进行探测:①由大气湍流运动引起的折射率不均匀结构对电磁波的散射；②稳定大气分层结构对入射电磁波的部分反射；③有时出现于中层大气的自由电子对电磁波的散射；④中层大气中的流星余迹散射。散射体积内空气的运动，使雷达回波具有多普勒频偏。结构 MST 雷达的结构和气象多普勒雷达大致相同。其特点在于：它们一般配备了大型天线（天线阵），有些甚高频段雷达的天线阵，尺度达 30～200米，采用半波振子阵或八木天线振子阵，以相控方式实现波束扫描。超高频段雷达采用直径几十米的可动抛物面天线，这类雷达的发射功率在几百千瓦至 2兆瓦之间，发射功率和天线面积的乘积值在106～1010瓦·米2之间。此外，为获得高灵敏度和高空间分辨率，在脉冲发射体制和回波数据处理方面，也采取一些技术措施。用途 利用回波的多普勒频谱可以进行下述各项测量：①探测大气风场的铅直分布。同一仰角，空间分辨率约为 150～1000米，采用脉冲压缩技术后，分辨率已可达到15米。②探测大气湍流结构。可以给出平均折射率湍流结构常数(C厒)的铅直分布。再引入一些大气湍流模式后，可以推算出湍流耗散率的铅直分布。③探测对流层顶高度及逆温层的高度和厚度。目前，甚高频和超高频多普勒雷达还只能测定上述气象要素的铅直廓线及其时间变化，而不能给出三维空间分布资料。参考书目K.S.Gage，B.B.Balsley,Doppler Radar Probing of the Clear Atmosphere,Bulletin of American MeteorologicalSociety,Vol.59，No.9，pp.1074～1093，1978.
