查询词典 trouble back signal

The noise frequency modulation signal was particularly analyzed. The Fokker-Planck equation of noise frequency modulation was presented and the Motion-Group Fourier Transform was used by converting the partial differential equation into the variable coefficient homogenous linear differential equations. Then the solutions were given by using the peano-baker series. So the probability density function of noise frequency modulation in the filter was given. On the basis of the probability density function the stochastic resonance of noise frequency modulation signal is analyzed.

首先建立了噪声调频干扰信号通过脉冲压缩雷达中频滤波器后所满足的福克尔－普朗克方程，然后利用群移傅立叶变换（Motion-Group Fourier Transform，MGFT）将此偏微分方程化成了变系数齐次线性微分方程组，并利用Peano-Baker级数法给出了该方程组的解，最后得到了噪声调频干扰信号通过脉冲压缩雷达中频滤波器后的概率密度函数，在此基础上研究了噪声调频干扰信号造成的随机共振现象。

A simplified signal model of digitalized receiver and the signal model of interference, such as tone interference, autoregressive interference and digital interference, are provided. And it is analyzed in detail the capability of DSSS communication systems in suppressing broadband Gaussian interference, single tone interference and partial band interference.

给出简化的接收机信号模型和常用的窄带干扰模型(音调干扰、AR干扰、低速数字干扰等)，分析了DSSS技术对阻塞高斯干扰、单音干扰、部分频带干扰等的抑制性能。

Path Isolation. On a matrix switching card, the isolation from signal HI and LO of one path to signal HI and LO of any other path.

通路隔离在矩阵卡上，一条通路的信号HI和LO与任意其它通路的信号HI和LO之间的隔离。

Tansformed the real part and imaginary part of interferogram to stationary wavelet domain, analyzed the PDF of signal and noise wavelet coefficients using Pearson distribution system, then evaluated the wavelet coefficients of signal in stationary wavelet domain by Maximum A Posterior criteria to reconstruct the interferogram.

2将干涉图的实部和虚部分解到静态小波域，用Pearson分布系作近似，分析了信号和噪声小波系数的概率密度函数，在静态小波域用MAP准则估计信号的小波系数用于干涉图的重建。

The technical ofblind signal separation is mainly discussed in this dissertation: including the theory and themethod. Then a multi-sensor intelligent data processing system is established to solve theproblem involved above. And this is belong to the pels fusion and the characteristic fusion ofinformation fusion. The research content and contributions of the author are summarized asfollows:(1) The pre-processing procedure of blind signal separation is mainly discussed in this chapter.

本文主要研究了信号盲分离技术的理论与方法，并在此基础上研究了一个多传感器数据智能处理系统用于解决多传感器信息融合系统中当传感器观测信号为实际目标信号的混合信号时，如何从观测信号中提取目标源信号的问题，它属于信息融合功能层次中的像素级融合和特征级融合。

A new signal peptidase recognition site has been found in the linker-encoded amino acid sequence.The change in length of the signal peptide might someshow increase the secretion efficiency or the synthesis of M.bla

由DNA顺序推知，linker区编码的氨基酸顺序SerGlnAlaGys可能是新的信号肽酶识别位点；信号肽长度的变化可能以某种方式影响蛋白质的分泌量。

Intermediate signal was observed in fibroblasts of tendon, periosteum and perichondrium. Weak signal occured in early chick embryos.

在同位素和非同位素原位杂交建立后，我们着手建立了双标记原位杂交方法。

Three new methods are provided, which are demodulation by means of envelop periodogram, multi-path signal and vector signal.

提出了包络周期图法、利用多途信号方法和利用矢量信号方法。

Compared to the ordinary PLL circuits, it can endure the short time appearance that occurs once in a horizontal line of the sync signal. It can adapt to the phase alternation character of a PAL video signal and recognize the phase alternation line. The local color sub-carrier can be generated for synchronous demodulation by the circuit.

该电路使用了全数字锁相环对色同步信号进行跟踪，与普通锁相环电路相比，它不仅能适应制视频信号中色同步信号每行出现一次和PAL制信号逐行倒相的特性，还能识别倒相开关信号，准确地产生本地色副载波用于同步解调。

The large signal and small signal SPICE circuit models of HBT and high-frequency model of PIN photodetector have been constructed.

建立了HBT的大信号与小信号SPICE电路模型以及PIN探测器的高频模型。

The dissecting of samples in group2 were difficult. The root of pulmonary artery and ascending aorta failed to be unfolded because fibrous tissue was tough, right and left fibrous trigone were too firm to be solved by hand. Cardiac muscle fibers couldn't be stripped along myofibrillar trajectory since they were prone to break because of their friability.

组2的心脏解剖困难，表现为纤维组织坚韧，游离肺动脉非常困难；徒手无法松解左、右纤维三角，肺动脉和主动脉根部的游离非常困难；心肌纤维坚硬、质脆，解剖时容易断离成碎块，无法沿纤维走行方向剥离。

We have battled against the odds in a province that has become increasingly violent.

我们对在一个争夺日益激烈省的可能性。