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取样函数
相关语句
  sampling function
     This paper, based on the discussion of several fast DWT algorithms, is focused in the computation methods of the values on sample space for prefilter selection, including the wavelet method, the direct method and the sampling function method;
     在论述离散小波变换快速算法的基础上 ,研究了对抽样空间上测量值的求取方法 ,即预滤波器的小波选取法、直接选取法、取样函数法及其特点。
短句来源
  “取样函数”译为未确定词的双语例句
     Two kinds of finite interpolation function are derived from two ways:(1)the convolution of sin(πt)/(πt)with a periodic impulse stain, and (2) the fundamental interpoation function of trigonometric polynomial.
     从以下两方面论证了上述有限取样内插函数:(1)无限取样函数sin(πt)/(πt)在有限区间的混叠; (2)三角多项式内插基本函数。
短句来源
  相似匹配句对
     Interpolation Function for Periodic and Finite Samples
     周期有限取样内插函数
短句来源
     A High Speed Sampling Theorem Expressed by Special Function
     由特殊函数表达的快速取样定理
短句来源
     MULTIPLE WINDOW FUNCTION
     多窗口函数
短句来源
     The icm-sum function
     最小公倍数的和函数
短句来源
     Sampling Device of Synthetic Resin
     合成树脂取样装置
短句来源
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  sampled function
A function or a signal sampled function can thus be decomposed into a set of embedded coarser and coarser approximations.
      
However, we should not expect the sampling result to decay faster than the sampled function.
      
It would mainly indicate the x, y parametric shadow, or numerical support in R2 of the sampled function.
      
The set of these discrete locations gives the sampled function.
      
We want to de ne an extension of our original sampled function to a function de ned on the whole real line.
      
  sampling function
The approximate sampling function defined uniquely by the mask of the refinement equation is the approximate solution of the equation, a piece-wise linear function, and posseses an explicit computation formula.
      
Therefore the mask of the refinement equation is selected according to one's requirement, so that one may controll the decay speed of the approximate sampling function.
      
The signal-to-noise characteristics of the Fourier transformed data are demonstrated with regard to the effects of a rectangular sampling function, spectral multiplexing and the pixel-to-pixel variation of the CCD array.
      
AIS-BN reduces the sampling variance by learning a sampling distribution that is as close as possible to the optimal importance sampling function.
      
Alternatively, the width of the sampling function in the time domain can be used as a measure of the sampler speed.
      
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n practice, the samples are often periodic and finite. To interpolate this type of signal,the finite interpolation function, which has finite interval of t, is used to reconstruct the original signal exactly.Two kinds of finite interpolation function are derived from two ways:(1)the convolution of sin(πt)/(πt)with a periodic impulse stain, and (2) the fundamental interpoation function of trigonometric polynomial.

对于周期有限取样序列,用有限取样内插函数作重构即可无失真地恢复原函数。从以下两方面论证了上述有限取样内插函数:(1)无限取样函数sin(πt)/(πt)在有限区间的混叠;(2)三角多项式内插基本函数。

WT5BZ]: The fast algorithm of discrete wavelet transform (DWT) ensures that the wavelet transform is widely applied in signal processing. In the algorithm, the computation of values on sample space is very important. This paper, based on the discussion of several fast DWT algorithms, is focused in the computation methods of the values on sample space for prefilter selection, including the wavelet method, the direct method and the sampling function method; at the same time, the corresponding properties of each...

WT5BZ]: The fast algorithm of discrete wavelet transform (DWT) ensures that the wavelet transform is widely applied in signal processing. In the algorithm, the computation of values on sample space is very important. This paper, based on the discussion of several fast DWT algorithms, is focused in the computation methods of the values on sample space for prefilter selection, including the wavelet method, the direct method and the sampling function method; at the same time, the corresponding properties of each method are discussed. And then based on wavelet coefficients with minimal norm errors, an optimal design for the prefilter is put forward. The errors of the various methods mentioned above are compared by simulation; the results show that the proposed optimal method has a fairly good precision in decomposition.

离散小波变换快速算法使得小波变换在信号处理领域得到广泛应用 ,其中抽样空间上测量值的求取是快速算法中的重要步骤。在论述离散小波变换快速算法的基础上 ,研究了对抽样空间上测量值的求取方法 ,即预滤波器的小波选取法、直接选取法、取样函数法及其特点。探讨了一种基于小波系数范数误差极小的预滤波器优化设计方法。仿真分析各种方法的误差 ,结果表明优化方法具有较好的分解精度。

Sampled fiber Bragg gratings (FBG) have many applications in wavelength division multiplexed (WDM) systems, and can be filtering or chromatic dispersion compensating simultaneously in multiple channels. Periodic phase-only sampling is a preferable approach to the design of multi-channel FBG, which facilitates the fabrication of multi-channel FBG. However the periodic sampling function replicates a given chromatic dispersion function, as a result, all the channels are identical and the resulting device cannot...

Sampled fiber Bragg gratings (FBG) have many applications in wavelength division multiplexed (WDM) systems, and can be filtering or chromatic dispersion compensating simultaneously in multiple channels. Periodic phase-only sampling is a preferable approach to the design of multi-channel FBG, which facilitates the fabrication of multi-channel FBG. However the periodic sampling function replicates a given chromatic dispersion function, as a result, all the channels are identical and the resulting device cannot compensate for the dispersion slope. An optimization method is presented to design weakly aperiodic phase-only sampled gratings, and a set of chirp controlling parameters, which are related to chromatic dispersion in each channel, are introduced to compensate the chromatic dispersion and the dispersion slope simultaneously. By using the simulated annealing method, an optimized set of the relative channel phases can be found to reducing the difference between the minimum and the maximum values of the amplitude modulation of the sampling function. Then, an iterative procedure, called the Gerchberg-Saxton algorithm, is applied to remove the amplitude modulation of the sampling function, and the aperiodic phase-only sampled grating is synthesized successfully. Finally, the complex reflection spectrum of the aperiodic phase-only sampled grating is simulated by using the transfer matrix method. All time delay curves in all channels are overlapped in one figure for a visible comparison of their slope, and the result shows that the dispersion compensation capacity in each channel can match with the dispersion slope of fiber link exactly. However, as a price of the Gerchberg-Saxton algorithm, the additional channels appear at both sides of the reflection spectrum.

取样光栅可以同时对多个信道进行滤波或色散补偿 ,所以在波分复用 (WDM)系统中有广泛的应用 ,其中周期相位取样光栅是一种很有前途的设计方法 ,但周期取样的方法会使取样光栅的所有信道具有相同的色散补偿能力。提出设计弱非周期性相位取样啁啾光栅的优化方法 ,通过引入一组与信道色散补偿量有关的啁啾控制参数 ,可使不同信道的色散补偿量存在差异。运用该方法设计出弱非周期的取样光栅后 ,可用传输矩阵法来模拟该光栅的复反射谱 ,结果显示通过调整啁啾控制参数 ,可方便地控制不同信道的色散补偿能力 ,从而能实现对光纤链路色散与色散斜率的同时补偿 ,而且取样函数的幅度值的起伏则被完全消除。

 
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