The conversion rules under which an algebraic expression can be obtained from a corresponding photoionizationGoldstone diagram have been given systematically in the present work.The electronic correlations in thephoto...The conversion rules under which an algebraic expression can be obtained from a corresponding photoionizationGoldstone diagram have been given systematically in the present work.The electronic correlations in thephotoionization processes then could be studied diagrammatically.The application to atomic scandium shows that thepresent theoretical scheme can give reasonable photoionization cross sections,which agree well with the experimentalresults.展开更多
Complex networks are everywhere. A typical example is software network. How to measure and control coupling interactions of software components is a largely explored research problem in software network. In terms of g...Complex networks are everywhere. A typical example is software network. How to measure and control coupling interactions of software components is a largely explored research problem in software network. In terms of graph theory and linear algebra, this paper investigates a pair of coupling metrics to evaluate coupling interactions between the classes of object-oriented systems. These metrics differ from the majority of existing metrics in three aspects： Taking into account the strength that one class depends on other ones, reflecting indirect coupling, and distinguishing various coupling interaction. An empirical comparison of the novel measures with one of the most widely used coupling metrics is described. Specifically, an experiment about the relationships of this pair metrics is conducted. The result shows that software complexity derived from coupling interaction could not be accurately reflected by one dimension of coupling metric for negative correlation.展开更多
基金The present study was part of The University Science & Technology Planning Program of Shandong Province under Grant No. J10LB60 (self-financing)partly supported by the Natural Science Foundation of Shandong Province under Grant No. ZR2011AM010 and 2009 Technology Innovation Fund (09L026) of Ludong University
文摘The conversion rules under which an algebraic expression can be obtained from a corresponding photoionizationGoldstone diagram have been given systematically in the present work.The electronic correlations in thephotoionization processes then could be studied diagrammatically.The application to atomic scandium shows that thepresent theoretical scheme can give reasonable photoionization cross sections,which agree well with the experimentalresults.
基金This research is supported by the National Key Basic Research and Development 973 Program of China under Grant No. 2007CB310805, Foundation for the Author of National Excellent Doctoral Dissertation of China under Grant No. 2007B4, the National Natural Science Foundation of China under Grant Nos. 60873083, 60803025, and the National High Technology Research and Development Program of China under Grant No. 2006AA04Z156.
文摘Complex networks are everywhere. A typical example is software network. How to measure and control coupling interactions of software components is a largely explored research problem in software network. In terms of graph theory and linear algebra, this paper investigates a pair of coupling metrics to evaluate coupling interactions between the classes of object-oriented systems. These metrics differ from the majority of existing metrics in three aspects： Taking into account the strength that one class depends on other ones, reflecting indirect coupling, and distinguishing various coupling interaction. An empirical comparison of the novel measures with one of the most widely used coupling metrics is described. Specifically, an experiment about the relationships of this pair metrics is conducted. The result shows that software complexity derived from coupling interaction could not be accurately reflected by one dimension of coupling metric for negative correlation.
