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wiener
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  维纳
     Here C_α~h = C(R~-,D(A~_α)) and (K, H) are two proper infinite dimensional spaces, 0 < α < 1, W(t) is a given K-value Wiener process, and both H and K are separable Hilbert spaces.
     这里Cαh=C(R-,D(Aα))和L20(K,H)是两个无限维空间,0<α<1,W(t)是一个给定的K-值维纳过程,H和K都是可分的希尔伯特空间.
短句来源
     Suppose a stochastic process X_T={X(t): t∈T} satisfces following equation:where W_T={W(t), t∈T} is a standard Wiener process.
     设有随机过程X_T={X(t):0≤t≤T}满足如下方程X(t)=∫_o~t sin θ3 d3+W(t) 0≤t≤T(1)其中W_T={W(t):θ≤t≤T}是标准维纳过程.
短句来源
     Extraction Method of P300 Based on Wiener Filtering and Fast Independent Component Analysis
     基于维纳滤波和快速独立分量分析的P300提取方法
短句来源
     The paper uses enhanced Lee filter, unbiased GMAP algorithm, shrinking of wavelet coefficients algorithm, wavelet analysis with Wiener filter, wavelet analysis with space filter to filter the speckle in four different SAR images, and gives a suggestion for the choice of right filter in different situation.
     分别选用增强Lee滤波算法、无偏GMAP算法、小波系数压缩滤波算法、小波变换与维纳滤波相结合、小波变换与空间滤波相结合的方法对四幅不同的SAR图像进行滤波,指出了各滤波算法对不同图像处理的优缺点,给出了在不同应用环境下,选择使用不同滤波器的意见。
短句来源
     Wiener LMS channel estimation and tracking algorithm for OFDM systems with transmitter diversity
     发射分集OFDM系统中的一种维纳LMS信道估计和跟踪算法
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  威纳
     Phytoplankton Shannon Wiener diversity index varied between 0 97 and 2 75, with the maximum found in August.
     浮游植物香农 -威纳多样性指数为0 .97~ 2 .75。
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     This paper is to approach a simple method for Wiener spectrum measurement in different medial imaging systems. The program written in VC++6.0 can be used to obtain the density datum as discrete signals by scanning films on AGFA DUOSCAN T2000XL scanner, then WS values can be calculated by using fast Fourier transform.
     探讨一种适用于多种医学成像系统的威纳频谱测试的简易方法.VC++6.0编程.用AGFA DUOSCAN T2000XL.扫描仪扫描胶片得到密度数据作为离散随机信号.经快速傅里叶变换计算WS。
短句来源
     Objective To study the effect of image processing on overall Wiener spectrum (WS) in a computed radiography system.
     目的 研究计算机X线摄影 (computedradiography,CR)系统中总威纳频谱 (Wienerspectrum ,WS)随影像处理的变化。
短句来源
     Investigation of Simple Wiener Spectrum Measurement in Medical Imaging Systems
     医学成像系统的威纳频谱简易测试方法探讨
短句来源
     The Wiener spectrum (WS) was determined by Fourier analysis on uniformly exposed films.
     对 2种增感屏 胶片体系均匀曝光 ,用显微密度计扫描 ,通过快速傅立叶分析计算威纳频谱 (Wienerspectrum ,WS) ;
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  “wiener”译为未确定词的双语例句
     Necessary Conditions for Renewal Processes Approximating to Wiener Processes
     Necessary Conditions for Renewal Processes Approximating to Wiener Processes
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     How big are the Csrg■-Révész increments of two-parameter Wiener processes?
     How big are the Csrg"非汉字符号"-Révész increments of two-parameter Wiener processes?
短句来源
     Trees Preserving the Wiener Index of P_1∨P_m
     扇形图P_1∨P_m中保Wiener指数的树
短句来源
     In chapter 2,we discuss the K-group of Wiener algebra W and show that K_0(W) = Z and K_1(W) = Z.
     第二章对Wiener代数W的K群进行较深入的讨论,得到K_0(W)=Z,K_1(W)=Z;
短句来源
     Let TC_6 be a polyhex torus covered by 2p×2q C_6s. A method for deriving formulas for calculating the Wiener index of TC_6 is given in this paper:W(G)=-4[]3pq~2+8p~3q~2+4[]3pq~4, if p≥q+2;
     设TC6[p,q]是一个由2p×2q个C6覆盖的环状纤维管,给出了计算TC6[p,q]的Wiener指数的一个闭公式W(G)=-34pq2+8p3q2+34pq4,当p≥q+2时;
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  wiener
Aliasing and Poisson Summation in the Sampling Theory of Paley-Wiener Spaces
      
Functions belonging to various Paley-Wiener spaces have representations in sampling series.
      
As a particular wavelet subspace, the Paley-Wiener space $B_{\pi}$ has both regular and irregular sampling theorems.
      
A* arises quite naturally in problems of summability of the Fourier series at Lebesgue points, whereas Wiener's algebra A of functions with absolutely convergent Fourier series arises when studying the norm convergence of linear means.
      
Analogs of Herz's and Wiener-Ditkin's theorems hold.
      
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Under the criteria of Wiener's least mean square error, the optimum solution of frequency-domain is given. If we consider the Widrow's tapped daley line as a transversal 'filter, it can approximate the optimum transfer function with required accurancy.Under certain conditions, the optimum weight cofficients of time-domain just equal the coefficients of Fourier expansion of optimum transfer function.two different proofs for those are given.; In the-end, some practical examples applying the results to be...

Under the criteria of Wiener's least mean square error, the optimum solution of frequency-domain is given. If we consider the Widrow's tapped daley line as a transversal 'filter, it can approximate the optimum transfer function with required accurancy.Under certain conditions, the optimum weight cofficients of time-domain just equal the coefficients of Fourier expansion of optimum transfer function.two different proofs for those are given.; In the-end, some practical examples applying the results to be described in this paper are shown.

在Wiener的最小均方差准则下,给出频域上最佳滤波器的解。证明了,当把widrow的抽头延迟线看作横向滤波器时,可以用任意精确度逼近频域上的最优解。在某种条件下,时域上最优解的加权系数就是频域上最优传输函数的Fourier展开式的系数。给出这种等价关系的一般表达式和两种不同的证明。最后给出把这些结果用于实际声呐设计的若干例子。

A recent trend in research of the mechanical modeling of an earthquake source is to look upon the source as a dynamically extending shear crack. In this paper, the authors have proposed a plane shear faulting model to simulate the rupture pro-cess of faulting during an earthquake. In this model, the friction force on the fault plane and the plastic region near the fault tip are considerd. By applying the Wiener-Hopf technique and the Cagniard-de Hoop method, the expressions for the displacement and stress...

A recent trend in research of the mechanical modeling of an earthquake source is to look upon the source as a dynamically extending shear crack. In this paper, the authors have proposed a plane shear faulting model to simulate the rupture pro-cess of faulting during an earthquake. In this model, the friction force on the fault plane and the plastic region near the fault tip are considerd. By applying the Wiener-Hopf technique and the Cagniard-de Hoop method, the expressions for the displacement and stress are obtained. With the help of the energy balance condi-tion in the small region around the fault tip, the average velocity C of the earthquake faulting and the scale of the plastic region are calculated. The dislocation distribu-tion function on the fault is discussed and the phenomenon that the high frequency components of certain foreshocks increase before great shocks is also explained. Here, according to the assumed conditions and parameters, the average velocity of the ear-thquake faulting c = 0.72 β, where β is the velocity of the S-wave, the scale of the plastic region is about 12% of the total length of the new fault. As to the seismie wave of such foreshocks, the decrease of half period of the first P arrivals due to the increase of rupture velocity will not exceed 39%.

研究震源力学模型的一个新方向是用动态扩展的剪切裂纹模拟地震破裂过程。本文利用裂端有塑性区薄层且断层面上有摩擦力的平面剪切裂纹错动模式来表示地震破裂过程,对运动方程和边界条件进行拉氏变换和傅氏变换,利用维纳-霍普(Wiener-Hopf)方法和卡格尼阿(Cagniard)方法得到了断层面上的位移和应力表达式。根据裂端附近的能量平衡条件,计算了地震破裂的平均速度和塑性区尺度,还讨论了断层面上的位错分布函数,并对某些前震地震波高频成分增多的现象提出了解释。在本文假定的参数条件下,地震破裂的平均速度c=0.72β,β是介质的剪切波速。塑性区尺度约为地震新断层总长度(包括塑性区)的12%。按本文的结果,由于破裂速度的增加,前震的震波初动半周期减小的异常幅度不会超过39%。

Two noise cancelling models designed with Wiener criteria of least mean square are shown in this paper. The general formula for calculating output signal-to-noise ratio is presented and the practical test rule for adaptive beamforming which employ those models are given.

本文给出按Wiener最小均方差准则设计的两种噪声抵消系统模型。给出计算输出信噪比的一般表达式,提出了把这种模型用于自适应波束成形时的实际检验准则。提出一种多波束自适应噪声抵消系统,分析了它的主要性能。本文的全部讨论都在频域上进行,文中给出利用信号平均功率谱密度和最佳线性滤波器的传输函数计算系统指向性的方法,给出了多波束噪声抵消法在自适应前后的指向性公式。实际的例子说明这种系统在抑制为数不多的干扰时具有很大的优越性。

 
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