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Contrastive Analysis of software networks Based on Different Coupling Relationships

China Communications 2010年第4期7卷 76-82页

作者： XU Guoai GAO Yang QI Yana PENG Junhao TANG Xianjing Key Laboratory of Network＇and-Infomlati0n Attack ＆ Defense Technology of MOE Beijing University of Posts and TelecommunicationsBeijing 100876 China College of Math and Information Science Guangzhou University Guangzhou 510405 China

Several software network models are constructed based on the relationships between classes in the object-oriented software ***,a variety of well-known open source software applications are statistically analyzed by using these *** results show that: (1) Dependency network does play a key role in software architecture;(2) The exponents of in-degree and total-degree distribution functions of different networks differ slightly,while the exponent of out-degree varies obviously;(3) Weak-coupling relationships have greater impact on software architecture than strong-coupling ***,a theoretically analysis on these statistical phenomena is proposed from the perspectives of software develop technology,develop process and developer’s habits,respectively.

关键词： software System software networks Coupling Relationship Degree Distribution

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Research on the Controllability of software networks Based on the Source-Driven Model

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Journal of Computer and Communications 2022年第8期10卷 26-40页

作者： He Tian Xianwei Meng Nan Hu Yanchao Wang Tianyi Yang School of Sugon Big Data Liaoning Institute of Science and Technology Benxi China College of Information Liaoning University Shenyang China

The complexity of software system has been increasing with software evolution, which affects the stability of software structure. Most of the existing measurement methods focus on the analysis of the macro-characteristics of the network topology, but lacked a certain depth and expansion to explore the nature of the complexity of the software structure, for this purpose, the complex network control theory was applied to the study of software network controllability. Firstly, the Source-Driver (SD) model was established based on the system control theory, the driver node sets were obtained by the minimum input theorem in the control process of software network topology;Then the relationship between the degree and center degree, the relationship between the in-degree and the out-degree of the software network topology were further analyzed owing to the non-uniqueness of the driver node sets;Finally, the values of the four indicators in the software system were compared. Experimental results show that the driver node sets in the software networks are mainly composed of nodes with low degree values, but it does not mean that the nodes whose in-degree values and out-degree values are also low;The action on control nodes and driver nodes are not random, the controllability of the driver nodes is closely related to the in-degree, when selecting the driver node sets, the network topology characteristics should be considered comprehensively, and the nodes with high degree and center degree are the first choice. The results have important guiding significance for the control, maintenance and redesign of software architecture.

关键词： Complex networks software networks Driver Node Sets Network Control

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Modeling and Dynamic Analysis in software Systems Based on Complex networks

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China Communications 2012年第12期9卷 137-143页

作者： Gao Yang Peng Yong Xie Feng Dai Zhonghua Xu Guo'ai China Information Technology Security Evaluation Center Beijing 100085 P. R. China Information Security Center Beijing University of Posts and Telecommunications Beijing 100876 P. R. China

A software network model with multiple links is constructed on the basis of a dynamical model of a general complex network with mukiple links. The principle of network division of multiple links is introduced. Following these principles, the software network model is decomposed into three types of subnets and different relationships between classes are revealed. Then, the dynamic analysis of software networks is presented. A sufficient condition for the stability of general complex networks is obtained followed by that of software networks. Finally, the dynamics of an open-source software system is analyzed, and their simulations are provided to demonstrate the effectiveness of the presented model.

关键词： software networks multiple links network division subnets dynamic analysis

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Complex networks with External Degree

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Chinese Journal of Electronics 2014年第3期23卷 442-447页

作者： LI Chunfang LIU Lianzhong School of Computer Science and Engineering Key Laboratory of Beijing Network Technology Beijing University of Aeronautics and Astronautics

The evolvement of complex networks is based on self-contained ultra-large system, but in fact all possible described networks are almost not completeness sub-networks. We study the more complete information description of complex system through introducing autonomous system and external degree, and investigate the statistical properties of external edges. The external nodes, external edges, and external degree provide natural and powerful extension for the traditional network concept of complex physical system, capable of providing more comprehensive information about the connectivity properties of the graph topology. Complex network with external degree provides scalable scale analysis for complex system with as less cost as possible. Experiments reveal that external degree also follows power-law distribution.

关键词： Complex networks Hypernetworks software networks

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