In order to reduce the influence of the mixing and overlap of frequency spectrum on the calculated result in the calculation of the fast Fourier transform of diffraction, the interval of sampling should be taken to be as small as possible.
在衍射的快速傅里叶变换计算中，为减小频谱混叠对计算结果的影响，应尽可能缩小取样间隔对函数进行离散。然而，大数目的取样对于容量有限的 FFT程序通常会形成困难。
In order to reduce the influence of th e mixing and overlap of frequency spectrum on the calculated result in the calcu lation of the fast Fourier transform of diffraction, the interval of sampli ng should be taken to be as small as possible.
在衍射的快速傅里叶变换计算中，为减小频谱混叠对计算结果的影响，应尽可能缩小取样间隔对函数进行离散。
The paper mainly discusses several basic methods about research ofseismic sedimentary microfacies.①Fourier spectrum analysis of SP well logs providesanother method for further study of SP logs.②The transverse prediction os stable sandlayer is completed by the application of instantaneous velocity.③Since the intervalvelocity of thin interbedding is fundamental to the microfaciea research a computationfrmula of the interval velocity of thin interbedding is put forward. The error has beenstudied in detail with...
着重叙述地震沉积微相研究的基本方法，包括①自然电位测井曲线的富氏谱分析，提供了进一步研究自然电位曲线的另一种手段；②由瞬时速度的基本概念出发，利用V进行了较稳定砂层的横向预测研究；③薄互层的层速度是微相研究的基础，提出了计算薄层层速度的方法，详细研究了其误差，得出关于误差分布的一系列有益的结论；④利用模式识别技术建立了地震沉积微相判别系统，对实际资料的试算表明该系统是可靠的。
It is shown that the harmonic yield tends to be saturated when driving laser is getting more and more intense, and that the harmonic radiation tends to be concentrated in a shorter interval when the harmonic order is getting higher, resulting in wider spectrum width.
标 签 压缩真空自发辐射量子干涉强激光场高次谐波时间特性 squeezed vacuum spontaneous emission quantum interference.intense laser field high-order harmonic generation time-profiles。
From power spectrum, self-correlation function, phase diagram, correlation dimension and Lyapunov exponent, we proved that the heart R-R interval signals is a kind of chaotic signals and further got the quantitative indication of them.
我们从功率谱、自相关函数、相图、分数维数和李雅普诺夫指数五个方面证明了心电R-R间期序列是一种混沌信号，并得到了对心脏心电R-R间期序列特性的定量表示方法，为进一步研究奠定了基础。
It is in the printing industry's hearing as required by regulations, which, for one, have the Munsell Color spectrum are rarely; second, the Munsell Color of some chromatagraphy deathcoil General ink printed copy and some will be able to simulationfor the inkometer of the Munsell Color chromatagraphy on the contrary, no; Thirdly, the Munsell Color spectrum does not have a description of the method to copy the color, select a color printer after its method of replication; in addition, the interval between the color swatch is large enough to be an exact match of the known color.
它在印刷产业洋的答讯由于下列来因而受到节制，其一，拥有孟塞尔色谱的工钱数好多；其二，孟塞尔色谱洋的一些色彩不克不及用凡是的油不朱印刷复制，而一些不妨用印刷油不朱表不隐的色彩孟塞尔色谱洋反而操纵；其不一，孟塞尔色谱上操纵表明复制该色的办法，印刷者选定一个色彩后还得查究复制它的办法；另边，色样之间的隔断较不小，不足以不小略不败婚已知的色彩。
The optimal inversion interval can be determined by doing an amplitude spectrum analysis of △ T anomaly.
可通过对△T异常作报幅谱分析确定最佳反演点距；
The spectrum plane is tow slits while CCD and its lens acting converse Fourier Transform System. When changing the space of lens which are positive and negative Fourier Transform, CCD moving locating focus is controlled by automatic comparing interval change of tow crests on CCD.
CCD和其透镜作为逆付里叶变换系统，输入面为两个狭缝，改变正、负付里叶变换透镜的距离，自动比较CCD上两个波峰的间隔变化来控制CCD移动定焦。
According to different experiment objects, the spectrometer can measure accurately the fluorescence attenuation curve and time resolution spectrum in the range of ps, ns and μ s by choosing suitable laser pulse interval.
按照不同的实验对象，选择合适的激光脉冲间隔，光谱仪可以准确测量皮秒、纳秒和微秒时间范围的荧光衰减曲线和时间分辨光谱。
Fatigue life prediction has been carried out respectively based on MM-Miner rule and EM-Miner rule. Moreover, the interval of fatigue life between 50% and 99.9% reliability is presented. The results show that amplitude value obeys weibull distribution and mean value obeys normal distribution. The adaptability of transmission gears is better and side-decelerator gears'is worse. In relation to one dimensional load spectrum, fatigue life under two-dimensional load spectrum is smaller and fatigue life considering load distribution along contact line is smaller.
研究结果表明，各工况载荷幅值均服从三参数威布尔分布，载荷均值均服从正态分布；传动系统中传动箱齿轮啮合副的强度匹配性良好，侧减速器行星齿轮啮合副较差；相对于单工况一维载荷谱，考虑齿间载荷修正的一维载荷谱和多工况合成的二维载荷谱下齿轮的疲劳寿命都有较大降低，在疲劳寿命预测时应引起足够的重视。
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。
The frequency spectrum and characteristics of pulse interval and width modulation (PIWM) are derived in detail.
推导了非同步型脉冲间隔与宽度双重调制（PIWM）的频谱及其特点。
Spectrum Analysis of Pulse Interval Modulation Signals
脉冲间隔调制信号的谱分析
An expression of spectrum for asynchronous analog pulse interval modulation signal using a static approachable method is given in this paper. The result is simple, and the physical concept is clear. It has been confirmed by an experiment simultaneously.
采用静态逼近方法，求出非同步模拟脉冲间隔调制信号简单而物理概念明确的谱表示，并由实验结果确认。
The chief analysis index was time domain (Lead ⅱ) and power spectrum (including QRS complex and Q-T interval) of wide frequency band electrocardiogram (WFB-ECG) in mice.
主要分析指标为Ⅱ导联宽频带心电图时域值及QRS波群和Q&T间期的功率谱。
Then using a recursion formula for the seismic velocity spectrum and interval velocity, the velocity values having the same time domain with the oil/gas geologic body are picked up and calculated.
再利用地震速度谱和层速度递推公式，分别拾取和计算与油气地质体同一时域的速度值。
A Novel Algorithm for Reducing Spectrum Leakage Based on Equal Angle-Interval Sampling Principle
减少频谱泄漏的一种新的等角度间隔采样递推算法
In order to solve the problem of reducing spectrum leakage, a new algorithm based on equal angle-interval sampling principle is proposed according to the cyclic shift character of base phasor.
就减少频谱泄漏问题，根据基相量循环移位性质提出了一种新的等角度间隔采样算法，并证明了该算法的递推特性。
First, the paper introduced the principle of the method, discussed the influence of sample interval of relaxation spectrum in the method and compared the method's result with the result from core mercury injection.
首先，介绍了基于梭状函数抽样的高分辨率弛豫谱反演方法的原理，并用该方法对岩心核磁数据进行了弛豫谱分解，讨论了弛豫谱抽样间隔对该方法的影响；
First, we apply multifractal spectrum theory to the study of the original traffic flow time series and the return interval.
首先，用多重分形谱分析原交通流数据与其重现区间的多重分形性。