On the basis, an analysis of the relationships between runout signal distortion, bit error length and foreign substances is given by numerical method. 场与基片杂质特性的数学模型,利用数值分析方法研究了读出信号畸变、误码长度与杂质特性的关系。
Take into account each line's bandwidth requirement, source impedance, signal magnitude, and run length; 考虑每条线带宽的需求,源阻抗、信号幅值和运行长度;
One is the detection of low SNR DSSS signal and extraction of length of PN code, the other is detection of BPSK signal from multi signals. 对直扩信号侦测的计算机模拟结果表明,该方法不仅能检测到低信噪比的此类信号,而且能提取到扩频码周期等参数。
The results show that when the signal line length of sensor is less than 100 m, its influence on sensor dynamic signal will be less than 1%. It meets the real train test requirement of measuring crossing air pressure pulse. 研究结果表明,当传感器信号线长度小于100m时,对传感器输出的动态信号影响不大于1%,满足列车交会空气压力波实车测量要求;
Several working state parameters of complete fluidic sprinkler are analyzed in this paper. Also, the influence of each structure parameter of the sprinkler, such as the depth of signal flow, the length of pipe and gap, on its capability is studied. 分析了全射流喷头工作状态的一些参数,同时提出喷头各结构参数:信号嘴插拔深度,导管长度以及间隙对其工作性能的影响。
The main problem is how to extend signal length and minimize the influence on signal end, that is, how to find out certain method to keep transformation signal length. 问题在于如何将其外延可以使信号末端的影响最小,或者说,如何找到保持变换信号长度的外延方法。
This chapter first brings in the preliminary definitions used in traffic signal control, including signal phase, signal stage, cycle length, split, offset, etc. 该部分首先介绍了交通信号控制中信号相位、信号阶段、周期时长、绿信比、相位差等基本概念;
Three typical methods of controlling chaos when the chaotic systems are driven by a common signal are discussed at length firstly, namely adaptive method, sampled data feedback method and moving surface method. 给出了在一般信号驱动下混沌控制的三种典型方法,即自适应控制方法、采样数据反馈控制方法和滑模变结构控制方法。
The simulating results show that the far field is quite similar to the driving voltage source and the amplitude of the far-field changes according to the signal bandwidth and the length of the antenna. 计算结果表明,天线远区场与馈电电压波形极为相似,其幅度也随着信号带宽和天线长度的变化而变化。
In the process of defining wavelet transform, signal length is assumed to be infinite, but the actual signal's length is limited, it is necessary to extend signal length before transform. 在定义小波变换时,信号长度认为是无限长的.但实际的信号是有限长的,所以,在对其进行变换前需将其外延。
This paper uses segmenting 3-order Hermite interpolation for base-line drift correction, and presents a linear transformation rules of interpolation basic functions when the signal length of interpolation interval changes owing to the changing of heart rate. 本文采用分片三次埃尔米特插值来作基线漂移校正,提出了当心率变化引起插值区间信号长度变化时,插值基函数的线性变换规则。
Many kinds of signals in the actual environment can be simulated through adjusting the parameters including carrier wave frequency, bit rate, output signal amplitude, length of pseudorandom sequence and SNR, which can provide data for the algorithm research about parameter estimation of DSSS signal. 该信号源能通过载波频率,码率,输出信号幅度,伪码长度及信噪比进行调整来模拟现实环境中的多种信号,为估计DSSS信号参数的算法研究提供数据。
In order to get a better accuracy of classification, we investigated how the classification accuracy was affected by the selection of signal length and interval. 为提高识别精度,详细研究了信号时程、时段的选择对模式识别精度的影响。
Intensity and pulsewidth of incident signal, the length of dispersion shift fiber ( DSF) and walk off between incident and clock signal influenced the output clock intensively. 重点分析了色散位移光纤的长度和入射信号的脉宽和强度、以及走离对输出时钟信号的影响;
The Discrete Chirp Fourier Transform ( DCFT) proposed recently is an effective technique for chirp signal detection. But it requires some rigorous restrictions on the signal length and parameters. These requirements restrict the application of DCFT. 离散ChirpFourier变换(DCFT)是最新提出的一种检测线性调频信号的有力技术,但它对信号的采样点数和信号参数有着近乎苛刻的约束条件,限制了它的工程应用。
Oppenheim and other authors proved that under some conditions a real signal of length N can be reconstructed by values of its phase at N& 1 distinct points. Oppenheim等人证明了在一定条件下,一个长度为N的实信号可以由它的相位在N-1个不同的点上的值来重构。
Meanwhile, through the comparison of kinds of complexity measures, it can be found that C0 complexity and approximate entropy ( ApEn) have the weakest sensitivity to window length, so it can be used for signal analysis of short length data. 同时,通过比较各种复杂度指标发现,C0复杂度和近似熵对采样长度的敏感性最弱,适用于短数据量的信号分析。
Effects of signal light axis offset, length to wide of rectangular detector, signal light axis tilt to heterodyne efficiency are all analyzed. 分析了信号光光轴偏移量、矩形探测器长宽比、信号光光轴倾斜角度等对矩形探测器外差效率的影响。
The effect of Gauss beam waist and imaging lens F, signal light axis offset, length to wide ratio of rectangular detector and signal light axis tilt to heterodyne efficiency have been analyzed and discussed. 分别讨论了高斯光束束腰和成像物镜F数、信号光光轴偏移量、矩形探测器长宽比及信号光光轴倾斜角度对外差效率的影响。
Through analysis of the metal detection size and transmission belt rate, Determines the size of the object identification accuracy, and then define the antenna working frequency, system sampling signal frequency, a frame length of data of such system design parameters. 2. 通过对金属检测尺寸及传输带速率的分析,确定了目标物体尺寸的识别精度,由此确定了天线工作频率、系统采样信号频率、帧数据长度等系统设计参数。
The selection of the signal processing length and the search step for the frequency rate is also given for prac-tical applications. 此外还给出了实际应用中信号处理长度和调频率搜索间隔的选取方法。
The solution can greatly upgrade the anti-jamming ( especially white noise) ability of FH system. According to the ratio of noise power to signal power, the length of code can be selected to guarantee the normal communication. 该方案能有效的提高跳频系统对抗白噪声的能力,根据干扰相对于信号的强度,采用适当长的码,跳频系统将总能正常运行。
The innovative achievements in this paper are: ( 1) A fast and arbitrary frequency estimation algorithm for sinusoid signal is proposed, which solves the realization problem of frequency estimation algorithm for sinusoid signal of any length in digital signal processors. 本文的主要创新性成果有:(1)提出了任意样本点正弦波高精度频率估计快速算法,该算法解决了任意样本点正弦波序列的频率估计在数字信号处器件中的实现问题。
Through researching the theoretical to determine the relation of high frequency signal and the length of transmission line. 在理论分析的基础上,确定传感器高频信号与传输线长度之间的关系。
The multipath time delay is analyzed according to elastic wave transmitting track in the earth channel. And guard interval length and OFDM signal circle length are established to ensure the system transfer rate and spectrum availability ratio. 根据弹性波在大地信道中的传输路径,分析多径时延扩展,在保证系统传输速率和频带利用率的基础上,确定保护间隔长度、OFDM符号周期长度。
In this way, an effect of different focus placement and different signal length for backscatter coefficient has been analyzed specifically. 在此基础上,本文在实验中分析了超声探头焦点位置的不同以及背向散射信号长度的变化对测量结果的影响。
The experiment one mainly studied the effects of the number of signal sources and the time length of sustained operation on operators 'performance and reliability. 共进行了两个实验:实验一着重考察信号源数量与作业时长对监控人员作业绩效及其可靠性的影响。
The radiation effectiveness of the model is studied. Furthermore, the radiated suppression effectiveness of line length, termination loads, loss and thickness of the substrate, separation between shielding line and signal line, width and length of shielding line is analyzed. 以此为基础研究了该模型环境下的电磁辐射效应,分析了信号线长度、终端负载、介质损耗、介质厚度、屏蔽线与强信号线间距离、屏蔽线宽度和长度对辐射抑制的影响规律。
When the eddy current sensor is drived with a multi-frequency signal, the length of defects can be quantitatively detected based on spectrum energy variation. 采用多频激励后,通过分析多频涡流检测信号的谱能量变化,可以对缺陷长度进行定量检测。