1)envelope detection包络检波
1.An non - coherent demodulation algorithm using envelope detection is introduced enlightened by the circuit for frequency demodulation according to the characteristic of common PCM/FM signal in the telemetering system.为解调遥测体制中常用的PCM/FM信号,在受到鉴频电路的启发后,提出了非相干包络检波算法,这种算法共包括限幅、求导、低通滤波3个步骤。
2.In this paper,an ultra-high frequency envelope detection circuit was designed on the basis of high-frequency characteristics of the high frequency detection diodes.笔者在对高频检波二极管特性分析的基础上研制了适用于提取GIS局部放电信号包络的超高频包络检波电路,采用ADS软件对该电路进行的仿真显示其具有很好的宽带特性和较小的峰值误差,电路的实际测试验证了该检波电路在GIS局部放电的研究中获得了较好的包络提取效果。
3.Therefore the amplitude modulation factor of LSK signal is close to 1,and it is hard to modulate the feedback signal using envelope detection method.在装定器接收到的负载调制信号中,载波信号与反馈信号相位相差π/2,且前者幅度远远大于后者,因此,负载调制信号的调幅度接近于1,用包络检波方式难以解调出反馈信号。
英文短句/例句
1.Anti-noise Performance Analysis to AM System with Synchronous Detection and Envelope Detection同步检波和包络检波下的AM系统抗噪声性能分析
2.The Research of Wrap Demodulation in Digital AM Broadcasting System数字调幅广播系统中包络检波方法的研究
3.On the Simulation Experiment of Diode Envelope Detection Realized by Computer用计算机实现二极管包络检波的仿真实验
4.Virtual Design on Weak Signal Envelope Detector Based on Pspice基于Pspice的小信号包络检波器的虚拟设计
5.THE RMS BANDWIDTH OF NONLINEAR ENVELOPE DETECTOR AND ITS APPLICATION TOCHANNEL MEASUREMENT非线性包络检波器的均方根带宽及其在信道测量中的应用
6.Simulation analysis of detection of crack location in a steel beam by using wavelet packet-neural networks模型钢梁裂缝检测的小波包网络仿真
7.Integrated Method of Multi-Target Detection and DOA Estimation by Exploiting Knowledge of Beam-Spectra Envelope基于波束包络信息的多目标检测与方位估计一体化方法
8.An Ultrasonic Intruder Detection Method Based on Echo Envelope基于回波包络的超声波入侵探测方法
9.Envelope Interaction in Wave Group and Wave Group Properties Study波群中波包络相互作用及波群特性的研究
10.Network anomal detection wavelet neural network based on QPSO基于QPSO小波神经网络的网络异常检测
11.The sum of these two waves has an envelope, and as the waves travel along, the envelope rides on them at different speed.两列波之和有一个包络，当两列波行进时，包络以不同的速率前进。
12.These solutions may be reduced to the envelope solitary wave solutions under some conditions.由这种方法得到的包络周期解在一定条件下可以退化为包络冲击波解或包络孤立波解.
13.Rolling Bearings Fault Diagnosis by Using Wavelet Packet and Envelope Analysis应用小波包和包络分析的滚动轴承故障诊断
14.The Application of Wavelet Packet in the Detection of Voltage Sag;小波包分析在电压暂降检测中的应用
15.Numerical simulation on the factors influencing duration time of S wave envelopeS波包络时间差影响因素的数值分析
16.Envelope periodic and solitary solutions of Davey-Stewartson equationDavey-Stewartson方程组的包络周期解和孤立波解
17.Successive positions of the wave front are then given by the envelopes of the secondary waves.因此波前的相继位置即为次波的包络面。
18.The initial investigation included chest X-ray and chest ultrasound.刚开始的检查包括胸部X光及超音波检查。
相关短句/例句
envelope demodulation包络检波
1.According to the analysis of vibration sign , using the envelope demodulation and FFT methods, improved the calculation precision for the rolling bear.综合利用了包络检波和对FFT频谱分析法,有效提高系统的实时性和测量精度,并实现了步进电机在运行中瞬时故障的实时监测和报警。
2.According to the analysis of vibration sign,using the envelope demodulation and FFT methods,improved the calculation precision for the rolling bearing diagnosis.综合利用了包络检波和对FFT频谱分析法,有效提高监测系统的实时性和测量精度,并实现了减速器在运行中瞬时故障的实时监测和报警。
3.The ultrasonic carrier is modulated by the pseudo-random sequence adopting ASK modulation mode,and the pseudo-random sequence is recovered from the ultrasonic echo through envelope demodulation.伪随机序列与超声载波采用ASK调制方式,利用包络检波法从超声回波中恢复出伪随机序列,并借助DSP芯片快速处理的优越性能,通过对伪随机序列进行相关运算,得到超声波的传播时延,从而根据超声测距原理比较精确地测量距离。
3)envelope-demodulation包络检波
1.A comb-filter and envelope-demodulation method based on combined Morlet wavelets;基于Morlet组合小波的梳状滤波与包络检波方法
2.Inspired by these characters, we present the method of filter and envelope-demodulation based on combined morlet wavelets.Morlet小波是高斯包络下的复指数函数,利用其虚部是实部的Hilbert变换、频域波形为钟形的特征,提出了基于 Morlet小波组合的滤波和包络检波方法。
4)envelop detection包络检波
1.In order to detect and identify the defects in GIS,the ultra-high frequency(UHF)envelope detection circuit and high-speed data acquisition system was designed,and the tests of five typical defects in GIS were made in the laboratory and the envelope signal was acquired based on ultra-high frequency envelop detection circuit.为实现GIS故障检测和缺陷识别,设计了超高频(UHF)包络检波电路和高速数据采集系统,并针对5种典型的GIS缺陷进行了缺陷模型的局部放电试验,获得了这5种典型缺陷的超高频包络信号数据。
5)envelope detector包络检波器
1.In the high-speed mode of 480 Mb/s data rate,improvements of basic structures of the transmitter and receiver are made to enhance performance,an innovative sampling-holding circuit is designed for the envelope detectors.在480Mb/s数据速率的高速模式下,在常规收发器的基础上作了改进,并为包络检波器设计了新颖的采样比较电路。
6)envelope detection technique包络检波技术
1.The principles of envelope detection technique and its application to extraction of partial discharge(PD) signals at ultra-high-frequency(UHF) are introduced.介绍了包络检波技术的基本原理及其在超高频局部放电信号提取中的应用,分析了影响信号检波失真的主要因素,设计了用于超高频局部放电检测的检波电路并进行了计算机MATLAB仿真。
延伸阅读
包络包络envelope 而充分条件是f任C，，并且满足(9)和下列条件: D ff.f.几、_Df云.几、 二二上二坦述二乙竺乙笋O，共月典二书笋砖0. D(x，y，z)一’D(A，B)对于曲面族r(u，。，A，B)，其中r任C，和rux瓦护0，必要条件是 甲=(ru孔rA)=0，少=(气凡rB)=0，(10)而充分条件是r任口，并且满足(l0)和 }〕三三，三}，。，、，。. !叭凡巧几心礼峪l n维流形中依赖于k个参数的一族m维子流形包络的更复杂概念可在可微映射奇异性理论的基础上引出，作为一族映射的奇异性的特殊形式.给出的平面曲线族，其中C是族的参数，“是沿族中曲线的参数，一点在包络上的必要条件是几11rc，或 ，一孚毕共~一。，(3) D(u，C)两者是同一回事. 充分条件是r‘CZ并且除满足(3)外还要满足 几共一rc叭笋0.(4)违反条件(2)和(4)往往与包络上出现尖点有关. 空间依赖于单参数C的曲面族的包络(山volopeofa fami】y ofsur阮璐)是这样的曲面，使得其上每个内蕴参数为(u，v)的点与族中参数为C(“，v)的曲面相接触，并且函数C(u，v)在(u，。)定义域的任何区域上不是常数.例如，中心在一直线上的同半径球面族的包络是一个柱面.对于由f(x，y，z，C)=0给出的曲面族，其中f“c’和沃廿诱l+匡}护0，包络的必要条件是满足方程组 了=0，fc=0;(5)而充分条件是fe口并且除(5)外再加上条件: fc。笋0，(6) }卫丝二玉立{+}卫艾2五立}+}卫丛选立}，。. }L， Lx，y)}}L，沙，z)1】L，Lz，x)!对于曲面族r(u，v，C)，其中r‘C’和‘x凡笋0，包络的必要条件是满足方程 职=(凡几几)=0;(7)而充分条件是r任CZ并且除(7)外还要满足下列条件: }叭叭毋。l }r二ru凡rurc}特o，}礼j+I叭i笋0.(8) l孔叽嵘几rc!违反条件(6)和(8)中的第一式往往与包络上出现尖棱有关.包络与族中每张曲面的接触线称为特征线(cl坦份以eristiC clu货).包络上的尖棱通常就是特征线的包络. 空间依赖于双参数A和B的一族曲面的包络是这样的曲面，使得其上每点(u，v)与族中参数为A(u，v)和B(u，岭的曲面相接触，并且在(u，v)定义域的任何区域上不存在函数。‘c’使A(“，好二。(B(。
