【摘 要】
：
As the scale and complexity have been increased in software systems,developers place more emphases on software engineering and system designs.Software architecture is evolved with update of softwares,and it plays a fundamental role in determining quality
【机 构】
：
School of Mathematics and Statistics,Xidian University,Xi’an 0710071,China
论文部分内容阅读
As the scale and complexity have been increased in software systems,developers place more emphases on software engineering and system designs.Software architecture is evolved with update of softwares,and it plays a fundamental role in determining quality of software systems.Multifractal characteristics of software networks can reflect software quality.In this paper,we construct a software network from the dependencies between object classes,and gain a deep understanding of software through network analysis.To be specific,multifractal analysis of the software network is performed based on a modified box-covering algorithm that yields fewer boxes.We verify that software with different functions and depen-dencies is multifractal.Further,different versions of the software are compared to discover the evolution of the software architecture.The results show that the singularity of class dependencies decreases as the software is updated.This trend leads to a more specific division of functions between software modules.One of the visible advantages of our work is that it allows the characterization of software structures at the code level.The methodology and results of this paper provide new insights into the evaluation and design of large-scale software systems.
其他文献
在鲤鱼饵料分别添加鱼油、豆油、菜籽油配置成等能等氮的饵料,探讨不同脂肪源对其机体抗氧化功能的影响.结果表明,鲤鱼饵料中分别使用鱼油、豆油、菜籽油对鲤鱼血清中的超氧化物歧化酶和过氧化氢酶活性未产生显著的影响(P>0.05).鱼油组总抗氧化能力和谷胱甘肽过氧化物酶活性显著高于菜籽油组(P0.05);鱼油组丙二醛含量显著低于豆油组和菜籽油组(P<0.05),豆油组丙二醛含量显著低于菜籽油组(P<0.05).在鲤鱼饵料中使用鱼油对其机体血清的抗氧化功能效果较好,鱼油优于豆油,豆油优于菜籽油.
We propose three alternative measures for non-Gaussianity of quantum states:sine distance,Bures angle,and Bures distance,which are based on quantum fidelity introduced by Wang[Phys.Lett.A 373 58(2008)].Using them,we evaluate the non-Gaussianity of some re
Partial least squares(PLS)regression is an important linear regression method that efficiently addresses the multiple correlation problem by combining principal component analysis and multiple regression.In this paper,we present a quan-tum partial least s
以吉富罗非鱼为试验对象,在基础饲料中添加1.0％、1.5％、2.0％的酵母水解物,研究不同剂量的酵母水解物对其生长性能的影响.结果表明:在吉富罗非鱼饵料中添加不同水平的酵母水解物对吉富罗非鱼的成活率、肝体指数、脏体指数无显著性影响(P>0.05).试验2组和试验3组吉富罗非鱼的试验末重比对照组显著分别提高了14.19％、9.53％(P<0.05);试验2组和试验3组吉富罗非鱼的增重率比对照组显著分别提高了17.40％、10.88％(P<0.05);试验2组和试验3组吉富罗非鱼的特定生长率比对照组显著分别提
The properties of the system near the instability boundary are very sensitive to external disturbances,which is impor-tant for amplifying some physical effects or improving the sensing accuracy.In this paper,the quantum properties near the instability bou
2021年7月在江西新余和余江两个黄鳝养殖试验点开展饲料替代试验,根据不同养殖户养殖习惯和养殖模式(两年段养殖和一年段养殖),分别设置新余0％(全幼杂鱼)组、50％饲料替代组、100％饲料替代组;余江30％饲料替代组、50％饲料替代组、70％饲料替代组.结果显示,50％替代组生长要优于更高比例的饲料替代组(70％或100％),而全鱼组、30％组、50％组之间生长没有明显差异;结合养殖户实践经验,50％饲料替代养殖稳定,技术成熟,可进行广泛示范推广.
The contradiction between classical and quantum physics can be identified through quantum contextuality,which does not need composite systems or spacelike separation.Contextuality is proven either by a logical contradiction between the noncontextuality hi
This paper studies a new class of two-dimensional rational maps exhibiting self-excited and hidden attractors.The mathematical model of these maps is firstly formulated by introducing a rational term.The analysis of existence and stabil-ity of the fixed p
稻渔综合种养是在传统的稻田养鱼模式基础上逐步发展起来的生态循环农业模式,是农业绿色发展的有效途径.本文在“稻-螺-鱼”综合种养试验示范基础上,系统总结了江西省“稻-螺-鱼”种养的技术要点.通过对鹰潭市贵溪姚超家庭农场开展的“稻-螺-鱼”综合种养试验测产和效益分析,结果显示,经过6～8个月的养殖,亩产水稻、田螺和鱼类分别达400 kg、750 kg和216 kg以上,亩综合产值、净收入达12000元和3820元以上,种养效益显著,为江西稻田综合种养产业提供了一种特色高效种养模式,发展前景广阔,可在全省推广应
Time delays exist widely in real systems,and time-delayed interactions can result in abundant dynamic behaviors and functions in dynamic networks.Inferring the time delays and interactions is challenging due to systematic nonlinearity,noises,a lack of inf