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algorithm
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  算法
    A Study of the Algorithm and Its Performance for GPS Ambiguity Resolution on the Fly
    GPS整周模糊度动态确定的算法及性能研究
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    A Study of Algorithm for Microwave Imaging
    微波成像的算法研究
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    Research of Time Domain Equalization Algorithm in Digital Subscriber Line System and ADSL Transceiver System on a Chip Design
    DSL系统时域均衡算法研究及ADSL收发器片上系统设计
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    A Study on the Algorithm of Ship Target Detection in SAR Imagery and Its Applications
    合成孔径雷达图像舰船目标检测算法与应用研究
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    Study on Image Coding Algorithm and Its Applications Based on Wavelet
    小波图像压缩编码算法及应用研究
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    Scattering Characters Analysis and Detection Algorithm of the Target for FOPEN SAR
    FOPEN SAR地面目标散射特性分析及检测研究
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    A Program for Generating the General N Winograd Fourier Transform Algorithm (WFTA) Program
    一个能生成一般N Winograd傅里叶交换(WFTA)程序的程序
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    Digital Convolution by Compound Algorithm ol FNT-WFTA
    用FNT-WFTA复合法的数字卷积运算
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    Optimal Algorithm for Fast Hartley Transform
    快速HARTLEY变换的最佳算式
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    The Encoding and Decoding Algorithm for Nonsystematic Reed-Solomon (RS) Codes
    非系统RS码的编码和解码
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  algorithm
This paper gives an algorithm for computing invariant rings of reductive groups in arbitrary characteristic.
      
The algorithm presented here computes a geometric characteristic of this action in the case where G is connected and reductive, and $\rho$ is a morphism of algebraic groups: The algorithm takes as input the
      
We present an algorithm for computing the invariant field k(X)G.
      
More precisely, we give an algorithm for computing a nonempty open subset of X with a geometric quotient.
      
We show that the rate of convergence for this reconstruction algorithm is geometric and computable in advance.
      
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The algorithms of sequence to one-one mapping and the principle of jump to one-one mapping are investigated. The mathematical models of basis structure for the binary code, left shifting code and Grey code, which provide bases for application of the mathematical models and physical models of Walsh function, is proposed. The partitioned sequential algorithms of higher space or multiinput binary rate multiplier is derived, the state matrix of the binary rate multiplier (proposed by D. J. Lancaster)...

The algorithms of sequence to one-one mapping and the principle of jump to one-one mapping are investigated. The mathematical models of basis structure for the binary code, left shifting code and Grey code, which provide bases for application of the mathematical models and physical models of Walsh function, is proposed. The partitioned sequential algorithms of higher space or multiinput binary rate multiplier is derived, the state matrix of the binary rate multiplier (proposed by D. J. Lancaster) is extended to sequential matrix or multiinput matrix.

本文研究了序列对应算式与跳变对应原理;对二进制码、左移码、葛莱码的基底结构提出了数学模型,为Walsh函数数字实现的数学模型与物理模型的实际应用提供基础.本文推导出高维数多(车入)入比例乘法器的分块时序矩阵算式.文中还将D.J.Lancaster关于比例乘法器的状态矩阵推广为多(车入)入或时序的矩阵.

This paper first discusses the question of factorization of matrix W of the discrete Fourier transform and proves that the 2~n×2~n matrix W_N, obtained by appropriate reordering of the rows of W, can be factored into a product of n spare matrices (where every row has only two nonzero entries). This provides a new rapid algorithm for the computation of discrete Fourier transform, and the precise number of operations for this method is also given.

本文首先研究了离散傅里哀变换(DFT)的变换矩阵(简称为W矩阵)的分解问题,证明了N=2~n阶的W矩阵可以分解成n个稀疏矩阵(每行只有两个非零元素)的乘积。然后利用所获得的分解式给出了一种快速计算DFT的方法,并对用这种方法计算DFT所需要的总计算量作了精确的统计。

A method of pitch extraction by Linear Prediction Code (LPC) analysis with predeter-ming voiced sounds is presented in this paper. At first, the voiced parts in speech signal is identified by the difference a0-a1, where a0=1 and a1 is the first coefficient of linear predictor, then only the voiced parts are processed to extract the pitch period. When pitch detecting, the data rate is compressed by half, the 8 coefficients of inverse filter are calculated by autocorrelation LPC method, and then for the residual...

A method of pitch extraction by Linear Prediction Code (LPC) analysis with predeter-ming voiced sounds is presented in this paper. At first, the voiced parts in speech signal is identified by the difference a0-a1, where a0=1 and a1 is the first coefficient of linear predictor, then only the voiced parts are processed to extract the pitch period. When pitch detecting, the data rate is compressed by half, the 8 coefficients of inverse filter are calculated by autocorrelation LPC method, and then for the residual signal, the output of the inverse filter, the pitch period is extracted by the Average Magnitude Difference Function (AMDF) method, and the curve of pitch period is linearly interpolated and nonlinearly filtered.The results obtained by our method is compared with those obtained by a semi-automatic pitch detector and by SIFT method. It is shown that the algorithm presented in this paper is quite precise and effective for continuous speech with background noise below 40 dB. It is unnecessary toalculate the pitch periods in voiceless sounds and silence periods, and the classification of voiced or unvoiced sounds is rather precise.

本文介绍一种预分浊音型的LPC基音提取算法,对语言信号先用线性预测系数a_0和a_1的差值分出浊音区,然后只对浊音部分进行基音提取。提取基频时,数据率减半,用LPC的自相关方法产生8个预测系数的倒滤波器,倒滤波后的误差信号,用平均幅差函数(AMDF)方法提取基频,再线性插值,最后用非线性平滑滤波,并将所得结果和一个半自动的精确算法,以及简化倒滤波(SIFT)算法进行比较,说明我们提出的算法,对背景噪声40dB以下的连续语言是准确有效的。它避免了清音和无声间隙区的音调计算,且浊音和清音的判别比较准确。

 
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