搜索结果: 1-15 共查到“计算机科学技术 matrix”相关记录15条 . 查询时间(0.125 秒)
On computing the H_infinity-norm of a transfer matrix
Transfer matrix the bisection algorithm computation the transfer matrix the norm
2015/8/13
We present a simple bisection algorithm to compute the H_infinity norm of a transfer matrix. The bisection method is far more efficient than algorithms which involve a search over frequencies, and mor...
Log-det heuristic for matrix rank minimization with applications to Hankel and Euclidean distance matrices
Positive semi-definite matrix convex sets functions half positive definite matrix distance data
2015/8/11
We present a heuristic for minimizing the rank of a positive semidefinite matrix over a convex set. We use the logarithm of the determinant as a smooth approximation for rank, and locally minimize thi...
Matrix-free convex optimization modeling
Convex optimization modeling framework convex optimization into the program linear function matrix graphic coding
2015/8/7
We introduce a convex optimization modeling framework that transforms a convex optimization problem expressed in a form natural and convenient for the user into an equivalent cone program in a way tha...
Two-dimensional systems with competing interactions: microphase formation under the effect of a disordered porous matrix
soft matter porous media microphase formation static structure dynamic properties
2012/2/21
We have investigated the effect of a disordered porous matrix on the cluster microphase formation of a two dimensional system where particles interact via competing interactions. To this end we have p...
基于模糊穹的特征保护方法存在敌手冒充和空间自由度减少的问题。为此，提出一种基于伪矩阵(Chaff Matrix)的可撤销声纹模板设计方法。通过原始特征矢量的构成元素产生伪点，根据定位矩阵将伪点插入原始特征，且在欧氏距离准则下，插入前后特征矢量与模板之间距离的变化量相同，从而保证系统识别率，实现特征保护。实验结果验证了该方法的正确性。
This report presents a unified treatment of the density of states for the knots and folds of polymer chains. The physical realization of such systems ranges from DNA molecules to the microscopic confi...
在实际应用中，Data Matrix二维条形码的解码效果会受到不均匀光照和复杂背景的影响。为此，提出一种层次化的Data Matrix实时解码方法。利用大津法将条码图像的前景和背景进行分割，得到二值化的条码图像，对其进行区域定位和精确定位。在此基础上，设计基于数字信号处理的二维条形码快速解码终端。实验结果表明，该解码方法具有较好的实时性和较高的鲁棒性。
Rough Computational Approach to UAR based on Dominance Matrix in IOIS
Dominance Relation Information System Rough Set Upper Approximation Reduction
2011/7/15
Rough set theory is a new mathematical tool to deal with vagueness and uncertainty. The classical rough set theory based on equivalence relation has made a great progress, while the equivalence relati...
Cross Correlation of Intra-day Stock Prices in Comparison to Random Matrix Theory
Principal Component Random Matrix Theory Cross Correlation Eigenvalues Stock Market
2011/4/29
We propose and apply a new algorithm of principal component analysis which is suitable for a large sized, highly random time series data, such as a set of stock prices in a stock market. This algorith...
Extracting Hierarchical Rules from a Weighted Alignment Matrix
Extracting Hierarchical Rules Weighted Alignment Matrix
2011/4/22
Word alignment is a fundamental step in machine translation. Current statistical machine translation systems suffer from a major drawback: they only extract rules from 1-best alignments, which adverse...
Co-occurrence matrix and its statistical features as a new approach for face recognition
Face recognition gray-level co-occurrence matrix Haralick features
2011/1/19
In this paper, a new face recognition technique is introduced based on the gray-level co-occurrence matrix (GLCM). GLCM represents the distributions of the intensities and the information about relati...
Data Matrix二维条形码解码器图像预处理研究
Data Matrix 图像预处理 定位
2009/12/10
DM码是一种常见的二维条形码，图像预处理是DM码解码器自动识别过程中的重要步骤。提出一种实用的DM码识别图像预处理方法。它没有使用传统的边缘检测和直线检测手段，因此受背景噪声、几何失真的影响较小。此外，使用了校正铁路线坐标，并按区域取样生成码流，显著提高了DM码的识别速度和识别率。实验结果表明，该算法可以克服DM码识别过程中易受噪声干扰、光照不均和几何失真等影响的问题。
Unified Principal Component Analysis with Generalized Covariance Matrix for Face Recognition
Unified Principal Component Analysis Covariance Matrix Face Recognition
2008/12/31
Recently, 2DPCA and its variants have attracted much attention in face recognition area. In this paper, some efforts are made to discover the underlying fundaments of these methods, and a novel framew...
Unified Principal Component Analysis with Generalized Covariance Matrix for Face Recognition
Unified Principal Component Analysis Generalized Covariance Matrix Face Recognition
2008/6/17
Recently, 2DPCA and its variants have attracted much attention in face recognition area. In this paper, some efforts are made to discover the underlying fundaments of these methods, and a novel framew...
FREQUENCY CONTENT ORIENTED MODIFICATION OF QUANTIZATION MATRIX IN DCT – BASED COMPRESSION
Image compression quantization matrix
2006/1/12
In order to improve the compression rate for comparable values of error metrics, we propose a method to modify the standard quantization matrix used in JPEG, according to image frequency content. Unli...