排序方式： 共有15条查询结果，搜索用时 15 毫秒
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In this paper,the explicit estimates of central moments for one kind of exponential-type operators are derived.The estimates play an essential role in studying the explicit approximation properties of this family of operators.Using the proposed method,the results of Ditzian and Totik in 1987,Guo and Qi in 2007,and Mahmudov in 2010 can be improved respectively. 相似文献
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Signals are often of random character since theycannot bear any information if they are predictable forany timet,they are usually modelled as stationary ran-dom processes. Balakrishnan[1]and Lloyd[2]investiga-ted the Shannon sampling on stationary randomp… 相似文献
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宋占杰 《天津大学学报(英文版)》2010,16(2):135-137
Szasz-type operators can be constructed by a Poisson process. The purpose of this paper is to derive the converse result in connection with Szasz-type operators by Steckin-Marchaud-type inequalities and new Ditzian modulus of continuity. The degree of approximation on deterministic signals is also given. 相似文献
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宋占杰 《天津大学学报(英文版)》2010,16(2)
Szász-type operators can be constructed by a Poisson process. The purpose of this paper is to derive the converse result in connection with Szász-type operators by Steckin-Marchaud-type inequalities and new Ditzian modulus of continuity. The degree of approximation on deterministic signals is also given. 相似文献
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建模教学与素质培养中的问题 总被引：2，自引：0，他引：2
讨论了国内数学建模教学与素质培养中的四个问题，并根据实践提出了相应改进意见 相似文献
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Nonlinear m-term approximation plays an important role in machine learning,signal processing and statistical estimating.In this paper by means of a nondecreasing dominated function,a greedy adaptive compression numerical algorithm in the best m-term approximation with regard to tensor product wavelet.-type basis is proposed.The algorithm provides the asymptotically optimal approximation for the class of periodic functions with mixed Besov smoothness in the Lq norm.Moreover,it depends only on the expansion of function f by tensor product wavelet-type basis,but neither on q nor on any special features of f. 相似文献
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利用古典Ｓｚａｓｚ算子和Ｓｚａｓｚ－Ｂａｓｋａｋｏｖ算子给出了新的混合Ｓｚａｓｚ－Ｂａｓｋａｋｏｖ型算子的表达式及其各阶矩，所给出了新算子包含了古典Ｓｚａｓｚ 算子和Ｂａｓｋａｋｏｖ算子，其各阶矩推广了已知Ｓｚａｓｚ算子和Ｂａｓｋａｋｏｖ算子各阶矩的结果。 相似文献
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The concept of structured sparse coding noise is introduced to exploit the spatial correlations and nonlocal constraint of the local structure. Then the model of nonlocally centralized simultaneous sparse coding(NC-SSC) is proposed for reconstructing the original image, and an algorithm is proposed to transform the simultaneous sparse coding into reweighted low-rank approximation. Experimental results on image denoisng, deblurring and super-resolution demonstrate the advantage of the proposed NC-SSC method over the state-of-the-art image restoration methods. 相似文献
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高等职业教育视域下“双师型”教师队伍建设探析 总被引：1，自引：0，他引：1
随着改革开放进程和市场经济转型的不断深入,社会对高素质、高技能型人才的要求不断提高。高等职业教育能否适应发展方式转变与经济结构调整对人才的新需求, 相似文献