Fracture toughness is very important when applying Damage Tolerance Design and Assessment Techniques. The traditional testing approach for obtaining fracture toughness values is costly and time consuming. In order to ...Fracture toughness is very important when applying Damage Tolerance Design and Assessment Techniques. The traditional testing approach for obtaining fracture toughness values is costly and time consuming. In order to estimate the fracture toughness of ductile metals, the fracture mechanics theory, materials plastic deformation theory and materials constructive relationships are employed here. A series of formulae and a theoretical approach are presented to calculate fracture toughness values of different materials in the plane stress and plane strain conditions. Compared with test results, evaluated values have a good agreement.展开更多
In this study, we present a constructive algorithm for training cooperative support vector machine ensembles （CSVMEs）. CSVME combines ensemble architecture design with cooperative training for individual SVMs in ens...In this study, we present a constructive algorithm for training cooperative support vector machine ensembles （CSVMEs）. CSVME combines ensemble architecture design with cooperative training for individual SVMs in ensembles. Unlike most previous studies on training ensembles, CSVME puts emphasis on both accuracy and collaboration among individual SVMs in an ensemble. A group of SVMs selected on the basis of recursive classifier elimination is used in CSVME, and the number of the individual SVMs selected to construct CSVME is determined by 10-fold cross-validation. This kind of SVME has been tested on two ovarian cancer datasets previously obtained by proteomic mass spectrometry. By combining several individual SVMs, the proposed method achieves better performance than the SVME of all base SVMs.展开更多
By examining the history of the Chinese journalism and typical cases in this field since reform and opening up,this paper analyzes from a historical perspective how the Chinese press has played a constructive role,and...By examining the history of the Chinese journalism and typical cases in this field since reform and opening up,this paper analyzes from a historical perspective how the Chinese press has played a constructive role,and how it has changed in parallel with media evolution and technological progress.The"constructiveness"of the Chinese press is manifested as follows:directly participating in public governance through collaboration with the government;supervising public power by starting from and aiming at finding solutions to problems;actively intervening in and helping address issues about people’s livelihood with well-planned news reports and relevant activities;mobilizing and organizing the public with constantly updated strategies and methods;and establishing think tanks to extend its services to society.Faced with both societal and industry crises,the Chinese press needs to explore new means to give full play to its constructive role.展开更多
文摘Fracture toughness is very important when applying Damage Tolerance Design and Assessment Techniques. The traditional testing approach for obtaining fracture toughness values is costly and time consuming. In order to estimate the fracture toughness of ductile metals, the fracture mechanics theory, materials plastic deformation theory and materials constructive relationships are employed here. A series of formulae and a theoretical approach are presented to calculate fracture toughness values of different materials in the plane stress and plane strain conditions. Compared with test results, evaluated values have a good agreement.
基金partly supported by the National Natural Science Foundation of China (No.60574019 and 60474045)the National Basic Research Program(973 Program)of China(No.2002CB312200)+2 种基金the Key Technologies R&D Program of Zhejiang Province (No.2005C21087)the Academician Foundation of Zhejiang Province(No.2005A1001-13)the Center for Bioinformatics Program Grant of Harvard Center of Neurodegeneration and Repair,Harvard Medical School,Boston,USA.
文摘In this study, we present a constructive algorithm for training cooperative support vector machine ensembles （CSVMEs）. CSVME combines ensemble architecture design with cooperative training for individual SVMs in ensembles. Unlike most previous studies on training ensembles, CSVME puts emphasis on both accuracy and collaboration among individual SVMs in an ensemble. A group of SVMs selected on the basis of recursive classifier elimination is used in CSVME, and the number of the individual SVMs selected to construct CSVME is determined by 10-fold cross-validation. This kind of SVME has been tested on two ovarian cancer datasets previously obtained by proteomic mass spectrometry. By combining several individual SVMs, the proposed method achieves better performance than the SVME of all base SVMs.
文摘By examining the history of the Chinese journalism and typical cases in this field since reform and opening up,this paper analyzes from a historical perspective how the Chinese press has played a constructive role,and how it has changed in parallel with media evolution and technological progress.The"constructiveness"of the Chinese press is manifested as follows:directly participating in public governance through collaboration with the government;supervising public power by starting from and aiming at finding solutions to problems;actively intervening in and helping address issues about people’s livelihood with well-planned news reports and relevant activities;mobilizing and organizing the public with constantly updated strategies and methods;and establishing think tanks to extend its services to society.Faced with both societal and industry crises,the Chinese press needs to explore new means to give full play to its constructive role.
