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Method to determine α in rough set model based on connection degree
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作者 Li Huaxiong Zhou Xianzhong Huang Bing 《Journal of Systems Engineering and Electronics》 SCIE EI CSCD 2009年第1期98-105,共8页
An improvement of tolerance relation is proposed in regard to rough set model based on connection degree by which reflexivity of relation can be assured without loss of information. Then, a method to determine optimal... An improvement of tolerance relation is proposed in regard to rough set model based on connection degree by which reflexivity of relation can be assured without loss of information. Then, a method to determine optimal identity degree based on relative positive region is proposed so that the identity degree can be computed in an objective method without any preliminary or additional information about data, which is consistent with the notion of objectivity in rough set theory and data mining theory. Subsequently, an algorithm is proposed, and in two examples, the global optimum identity degree is found out. Finally, in regard to optimum connection degree, the method of rules extraction for connection degree rough set model based on generalization function is presented by which the rules extracted from a decision table are enumerated. 展开更多
关键词 rough set data mining connection degree identity degree set pair relative positive region.
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Debris Flow Hazard Assessment Using Set Pair Analysis Models:Take Beichuan County as an Example 被引量:10
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作者 YANG Feng-guang LIANG Yue +6 位作者 SINGH Vijay P. WANG Wen-sheng ZHOU Xiao-quan LIU Xing-nian CAO Shu-you HUANG Er WU Yan-hua 《Journal of Mountain Science》 SCIE CSCD 2014年第4期1015-1022,共8页
Assessment of debris flow hazards is important for developing measures to mitigate the loss of life and property and to minimize environmental damage. Two modified uncertainty models, Set Pair Analysis (SPA) and mod... Assessment of debris flow hazards is important for developing measures to mitigate the loss of life and property and to minimize environmental damage. Two modified uncertainty models, Set Pair Analysis (SPA) and modified Set Pair Analysis (mSPA), were suggested to assess the regional debris flow hazard. A ease study was conducted in seven towns of the Beichuan county, Sichuan Province, China, to test and compare the application of these two models in debris flow hazard assessment. The results showed that mSPA only can fit for value-variables, but not for non value-variable assessment indexes, Furthermore, as for a given assessment index xi, mSPA only considers two cases, namely, when grade value increases with xi and when grade value decreases with xi. Thus, mSPA can not be used for debris flow hazard assessment but SPA is credible for the assessment because there are no limitations when using SPA model to assess the debris flow hazard. Therefore, in this study SPA is proposed for assessing debris flow hazard. 展开更多
关键词 Set Pair Analysis (SPA) Modified SetPair Analysis (mSPA) Debris flow Hazardassessment Connection degree
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A Research for Regional Contribution Rate of Internal Source and External Source of PM_(2.5) Based on Set Pair Analysis Method 被引量:1
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作者 Zhou Yejing Zhou Jingxuan Xiao Renbin 《Meteorological and Environmental Research》 CAS 2016年第2期36-40,44,共6页
A problem of the air pollution control in China is getting to know a regional contribution rate of internal and external source of PM2.5. In this paper,Set Pair Analysis( SPA) method is proposed to calculate the con... A problem of the air pollution control in China is getting to know a regional contribution rate of internal and external source of PM2.5. In this paper,Set Pair Analysis( SPA) method is proposed to calculate the contribution rate of PM2.5in Dongguan City. Due to geographic,meteorological factors and the low concentration of air pollutants in Qingxi area,the PM2.5in this place is mainly contributed by the regional transport of air pollutants from other inside areas of Dongguan,and less affected by the outside of Dongguan. So the concentration of PM2.5in Qingxi area can reflect the Dongguan's basic background concentration of PM2.5. On the basis of the basic background concentration,firstly the concentration of each pollutant components is divided into the internal part and the mixed part. Secondly using the source apportionment samples of five monitoring sites in Dongguan we can respectively construct a sample set A and an evaluation set B. Thirdly the SPA is operated onto the mixed part in terms of set B.At last the connection degree between the concentration of each pollutant components and external source and internal source will be calculated,that is the contribution rate. The research reveals that the contribution rate of internal source and external source of PM2.5in Dongguan City is 83%and 17% respectively,which roughly met expectations. This method is simple and effective and it can provide a reference for the government taking reduction measures to control PM2.5pollutants emission. 展开更多
关键词 Set Pair Analysis Connection degree PM2.5 Internal source External source Contribution rate
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A Novel Model for Context Conflict Resolution Basec on Set Pair Analysis
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作者 DUO Lin LAI Xiaoyang +1 位作者 LIU Zengli CHEN Xi 《China Communications》 SCIE CSCD 2014年第A02期70-78,共9页
Context-aware plays a pivotal role in the wisdom network of information processing. Due to the limited resources, context conflict is inevitable in context-aware. User satisfaction is a good reflection for the wisdom ... Context-aware plays a pivotal role in the wisdom network of information processing. Due to the limited resources, context conflict is inevitable in context-aware. User satisfaction is a good reflection for the wisdom degree of the network. In this paper, considering the user satisfaction, we propose a novel context-aware conflict solution model based on set pair Analysis (SPA). The model obtains the best server mode by the maximum satisfaction connection degree to solve the conflict in context-aware. The simulation analysis shows that the proposed method is effective and can solve many users competition for the same scene of conflict. 展开更多
关键词 CONTEXT-AWARE context conflict SPA satisfaction connection degree
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Constructing refined null models for statistical analysis of signed networks
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作者 Ai-Wen Li Jing Xiao Xiao-Ke Xu 《Chinese Physics B》 SCIE EI CAS CSCD 2021年第3期571-577,共7页
The establishment of effective null models can provide reference networks to accurately describe statistical properties of real-life signed networks.At present,two classical null models of signed networks(i.e.,sign an... The establishment of effective null models can provide reference networks to accurately describe statistical properties of real-life signed networks.At present,two classical null models of signed networks(i.e.,sign and full-edge randomized models)shuffle both positive and negative topologies at the same time,so it is difficult to distinguish the effect on network topology of positive edges,negative edges,and the correlation between them.In this study,we construct three re-fined edge-randomized null models by only randomizing link relationships without changing positive and negative degree distributions.The results of nontrivial statistical indicators of signed networks,such as average degree connectivity and clustering coefficient,show that the position of positive edges has a stronger effect on positive-edge topology,while the signs of negative edges have a greater influence on negative-edge topology.For some specific statistics(e.g.,embeddedness),the results indicate that the proposed null models can more accurately describe real-life networks compared with the two existing ones,which can be selected to facilitate a better understanding of complex structures,functions,and dynamical behaviors on signed networks. 展开更多
关键词 signed networks null models statistical analysis average degree connectivity EMBEDDEDNESS
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Efficiency Evaluation for the Annual Equipment Maintenance Based on Set Pair Analysis
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作者 赵湘 陈罡 岳强斌 《Journal of Donghua University(English Edition)》 EI CAS 2016年第2期244-247,共4页
Most traditional assessment methods, which have complicated mathematic formulas,are difficult for calculation and application in system efficiency evaluation. A new approach to annual equipment maintenance system effi... Most traditional assessment methods, which have complicated mathematic formulas,are difficult for calculation and application in system efficiency evaluation. A new approach to annual equipment maintenance system efficiency assessment,the set pair analysis method( SPAM),has been proposed based on the principle of set pair analysis( SPA). Firstly,the evaluation index system of the annual equipment maintenance is proposed. Secondly,the evaluation model of the annual equipment maintenance efficiency based on the SPAM is built. Then the application processes of the SPAM are introduced. At the end of the paper,a real application example is given. The results of the application indicate that the proposed model is feasible and effective. It can give strong supports to improve the evaluation effect of the unit equipment maintenance support. 展开更多
关键词 set pair analysis(SPA) equipment maintenance connection degree EVALUATION
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Application of Improved SPA Method in the Comprehensive Assessment of Groundwater Environment Quality:A Case Study of Jinjiang, Fujian Province
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作者 SU Jianyun HUANG Yaoyi LI Bin 《Journal of Landscape Research》 2016年第1期73-75,79,共4页
This paper applied the set pair analysis with improved five-element connection degree to assess shallow groundwater quality of Jinjiang City, Fujian Province, and used map to show the spatial distribution. The assessm... This paper applied the set pair analysis with improved five-element connection degree to assess shallow groundwater quality of Jinjiang City, Fujian Province, and used map to show the spatial distribution. The assessment results showed that most groundwater in the district was in the grade I and II, i.e. the overall groundwater environment in this area was favorable; groundwater of grade III(poorer level) was mainly distributed in Dongshi Town in the coastal region, and the total area was smaller. Major out-of-limit factors are TDS, nitrate, nitrite, ammonia nitrogen, and chloride, therefore, industrial and agricultural development, human activities and seawater invasion were major causes for the aggravation of water quality. 展开更多
关键词 Improved set pair analysis Five-element connection degree GROUNDWATER Comprehensive assessment
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Social network analysis and network connectedness analysis for industrial symbiotic systems: model development and case study 被引量:5
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作者 Yan ZHANG Hongmei ZHENG Bin CHEN Naijin YANG 《Frontiers of Earth Science》 SCIE CAS CSCD 2013年第2期169-181,共13页
An important and practical pattern of industrial symbiosis is rapidly developing: eco-industrial parks. In this study, we used social network analysis to study the network connectedness (i.e., the proportion of the ... An important and practical pattern of industrial symbiosis is rapidly developing: eco-industrial parks. In this study, we used social network analysis to study the network connectedness (i.e., the proportion of the theoretical number of connections that had been achieved) and related attributes of these hybrid ecological and industrial symbiotic systems. This approach provided insights into details of the network's interior and analyzed the overall degree of connectedness and the relationships among the nodes within the network. We then characterized the structural attributes of the network and subnetwork nodes at two levels (core and periphery), thereby providing insights into the operational problems within each eco-industrial park. We chose ten typical eco-industrial parks in China and around the world and compared the degree of network connectedness of these systems that resulted from exchanges of products, byproducts, and wastes. By analyzing the density and nodal degree, we determined the relative power and status of the nodes in these networks, as well as other structural attributes such as the core-periphery structure and the degree of sub-network connectedness. The results reveal the operational problems created by the structure of the industrial networks and provide a basis for improving the degree of completeness, thereby increasing their potential for sustainable development and enriching the methods available for the study of industrial symbiosis. 展开更多
关键词 industrial ecology industrial symbiosis system social network analysis degree of connectedness industrial ecology parks China
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Degree sums,connectivity and dominating cycles in graphs
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《Chinese Science Bulletin》 SCIE CAS 1998年第4期351-351,共1页
关键词 degree sums connectivity and dominating cycles in graphs
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Grey Connection Analysis on Countryside Society & Economy Sustainable Development Based-on Per Capita Net Income of Peasants
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作者 ZHOUJian-zhong LINJian-bing 《Systems Science and Systems Engineering》 CSCD 2002年第1期99-104,共6页
In this paper, the authors research sustainable development of countryside′s society economy in Fujian Province of China by Grey connection analysis. The authors also discuss the effect of society and resource & ... In this paper, the authors research sustainable development of countryside′s society economy in Fujian Province of China by Grey connection analysis. The authors also discuss the effect of society and resource & ecology environment on per capita net income of peasants, and research the mechanism of sustainable development of countryside′s society economy, and raise some countermeasure and measure. 展开更多
关键词 grey connection analysis degree of grey connection COUNTRYSIDE sustainable development
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Worm attack detection and response
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作者 CHEN Bo YU Xiangzhan +1 位作者 FANG Binxing YUN Xiaochun 《Frontiers of Electrical and Electronic Engineering in China》 CSCD 2007年第4期464-472,共9页
There appear many Internet-scale worm incidents in recent years,which have caused severe damage to the society.It is clear that a simple self-propagation worm can quickly spread across the Internet.Therefore,it is nec... There appear many Internet-scale worm incidents in recent years,which have caused severe damage to the society.It is clear that a simple self-propagation worm can quickly spread across the Internet.Therefore,it is necessary to implement automatic mitigation which can detect worm and drop its packet.In this paper,the worm’s framework was first analyzed and its two characteristics were detected.Based on the two characteristics,a defending algorithm was presented to protect network.Experimental results verify that our algorithm is very effective to constrain the worm propagation and meanwhile it almost does not interfere in normal activity. 展开更多
关键词 wormdetection networkmonitoring connection degree lossy counting
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