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    Finally the following parameters are calculated: thedifference time τ1, τ2 and τ3 at which | ρ|≤, | ρ|≤1/e2 and | ρ|≤ 0.05, exponentialattenuation constant a, average frequency and no.
    最后算出|ρ|开始小于1/e,1/e~2与0.05的相关时间τ_1,τ_2与τ_3,以及在分段过程τ_1,τ_2-τ_1,τ_3—τ_2和整个过程τ_3中的平均振荡频率f,指数衰减系数α,过零点数目N等,其中N/τ3f很接近于2。
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    Current analytical techniques applied to fMRI data require a priori knowledge or specific assumptions about the time courses of processes contributing to the measured signals.
    5.对fMIU信号的研究大多是在假定已知事件相关时间过程曲线的情况下,利用相关性分析得到脑的激活区域.
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    In the chapter 2, the method of order due date forecasting for 001 enterprise is presented based on characteristics of production of 001 enterprise, which forecasts the order due date exactly based on holding the information of the producing and purchasing of 001 enterprise real-timely, by the order statistic and gathering, calculating order priority, preparating of enquiry's material, calculating the related time of order assembling, order assembly scheduling and so on.
    第二章在分析001企业生产特点的基础上,提出了面向001企业的订单交货期预测方法,该方法在实时掌握企业生产与采购等信息的基础上,通过订单统计与汇总、订单优先级计算、询单物料准备、订单装配相关时间计算和订单装配排程等,较准确地预测询单的交货期。
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  correlation time
Correlation functions of gas-dynamic parameters at the pipeline boundary are studied and the corresponding characteristics (correlation time, delay time, etc.) are determined from the model for different initial and boundary conditions.
      
A share of membrane-bound spin probe was different for chloroplasts and subchloroplast fragments, as well as its rotational correlation time and apparent enthalpy and entropy activation of nitroxide rotational motion.
      
However, the rotational correlation time τ for spin-labeled Bs and its complex with Bn in solution corresponded precisely to their molecular weights.
      
It is likely the spin correlation time of the triplet states is longer than the lifetime of the complexes.
      
Basic parameters of the correlation (time, distance, relaxation time) are calculated from experimental data.
      
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From noise voltage frequency spectral data Ss(ω) taken from carrier channels along many transmission lines in China, relative power spectra are calculated. Then by step-by-step integration method, the equations for corresponding correlation coefficients, or normalized autocorrelation ρ ate derived in terms of Ss(ω) and difference time τ. The shapes of the calculated ρ-τ curves are in general irregular, but in several cases where maximum Ss(ω) occurs at lower measuring frequency, p-r curves resemble the shape...

From noise voltage frequency spectral data Ss(ω) taken from carrier channels along many transmission lines in China, relative power spectra are calculated. Then by step-by-step integration method, the equations for corresponding correlation coefficients, or normalized autocorrelation ρ ate derived in terms of Ss(ω) and difference time τ. The shapes of the calculated ρ-τ curves are in general irregular, but in several cases where maximum Ss(ω) occurs at lower measuring frequency, p-r curves resemble the shape of damped cosinusoid e-aτ cos 2 πf τ. Finally the following parameters are calculated: thedifference time τ1, τ2 and τ3 at which | ρ|≤, | ρ|≤1/e2 and | ρ|≤ 0.05, exponentialattenuation constant a, average frequency and no. of zero crossings N, in intervals τ1, τ2-τ1, τ3-τ2 and τ3. It is found N/τ3f= 2, τ3 determines the upper limit of frequency ofsignal envelope for optimum reception. When higher carrier frequency (>40000 Hertz) is used, τ3 is usually smaller, this upper frequency limit 1/τ3 becomes higher.

根据在我国各区电力线路上测试的噪声频谱密度数据Ss(ω),先算出相对功率频谱密度,再用逐段积分法,求出相关系数ρ与相差时间τ的关系曲线。 在大值由Ss(ω)集中在一个较低频率的几个情况下,ρ-τ曲线的形状相当接近于e~(-ατ)cos 2πfx;在大值Ss(ω)比较分散的一般情况下,它的振荡形状是很不规则的。 最后算出|ρ|开始小于1/e,1/e~2与0.05的相关时间τ_1,τ_2与τ_3,以及在分段过程τ_1,τ_2-τ_1,τ_3—τ_2和整个过程τ_3中的平均振荡频率f,指数衰减系数α,过零点数目N等,其中N/τ3f很接近于2。第一分段τ_1中所得的参数和整个过程τ_3中所得的平均参数相差很远,因而第一分段的参数不能表示整个过程的特征。τ_3决定着通道中不积累误差的载波包络的频率高限。一般地讲,如果在通道中使用较高的载频(4万赫以上),所得的τ_3较小。因而可用较高的载波包络频率,也就是信号频率可以提高些而不致降低信号噪声比。

A system subjected to colored noise is analysed in terms of a two-dimensional Fokker-Planck equation. The local probability density around a deterministic saddle is investigated. A probability hole is found around the saddle at sufficiently large correlation time and at not too large and too small noise strength.

利用二维Fokker—Plack方程分析了色噪声系统,研究了在决定性方程的鞍点附近的几率密度的局域分布,并且发现:当色噪声有足够长的相关时间,而噪声强度处于不太强又不太弱的中间区域时,在鞍点的几率密度分布会出现极小值。

This paper discusses the pinciples of the generalized correlation methods for time delayestimation and studies the adaptive realizations of Roth,SCOT PHAT and ML weighted correlators.The theoretical bases and the pefomances of the adaptive methods are analysed. The results of computer simulation are given.

本文讨论了广义相关时间延迟估计方法的基本原理和主要内容,着重研究了Roth,Scot(平滑相干变换),PHAT(相位变换)和ML(最大似然)加权的四种广义相关时延估计方法的LMS自适应实现问题。给出了自适应实现的理论依据,分析了其性能,井给出了计算机模拟的结果。

 
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