期刊文献+
共找到5篇文章
< 1 >
每页显示 20 50 100
Mathematical Foundation of Basic Algorithms of Fuzzy Reasoning 被引量:1
1
作者 潘正华 《Journal of Shanghai University(English Edition)》 CAS 2005年第3期219-223,共5页
Algorithm of fuzzy reasoning has been successful applied in fuzzy control,but its theoretical foundation of algorithms has not been thoroughly investigated. In this paper,structure of basic algorithms of fuzzy reasoni... Algorithm of fuzzy reasoning has been successful applied in fuzzy control,but its theoretical foundation of algorithms has not been thoroughly investigated. In this paper,structure of basic algorithms of fuzzy reasoning was studied, its rationality was discussed from the viewpoint of logic and mathematics, and three theorems were proved. These theorems shows that there always exists a mathe-~matical relation (that is, a bounded real function) between the premises and the conclusion for fuzzy reasoning, and in fact various algorithms of fuzzy reasoning are specific forms of this function. Thus these results show that algorithms of fuzzy reasoning are theoretically reliable. 展开更多
关键词 fuzzy reasoning algorithm of fuzzy reasoning FMP (fuzzy modus ponens) CRI(compositional rule of inference) algorithm 3I algorithm.
下载PDF
New reasoning algorithm based on EFALC
2
作者 周波 陆建江 +2 位作者 张亚非 康达周 李言辉 《Journal of Southeast University(English Edition)》 EI CAS 2006年第4期496-500,共5页
The current extended fuzzy description logics lack reasoning algorithms with TBoxes. The problem of the satisfiability of the extended fuzzy description logic EFALC cut concepts w. r. t. TBoxes is proposed, and a reas... The current extended fuzzy description logics lack reasoning algorithms with TBoxes. The problem of the satisfiability of the extended fuzzy description logic EFALC cut concepts w. r. t. TBoxes is proposed, and a reasoning algorithm is given. This algorithm is designed in the style of tableau algorithms, which is usually used in classical description logics. The transformation rules and the process of this algorithm is described and optimized with three main techniques: recursive procedure call, branch cutting and introducing sets of mesne results. The optimized algorithm is proved sound, complete and with an EXPTime complexity, and the satisfiability problem is EXPTime-complete. 展开更多
关键词 extended fuzzy description logic cut concept TBox reasoning algorithm
下载PDF
Risk assessment of water security in Haihe River Basin during drought periods based on D-S evidence theory 被引量:7
3
作者 Qian-jin DONG Xia LIU 《Water Science and Engineering》 EI CAS CSCD 2014年第2期119-132,共14页
The weights of the drought risk index (DRI), which linearly combines the reliability, resiliency, and vulnerability, are difficult to obtain due to complexities in water security during drought periods. Therefore, d... The weights of the drought risk index (DRI), which linearly combines the reliability, resiliency, and vulnerability, are difficult to obtain due to complexities in water security during drought periods. Therefore, drought entropy was used to determine the weights of the three critical indices. Conventional simulation results regarding the risk load of water security during drought periods were often regarded as precise. However, neither the simulation process nor the DRI gives any consideration to uncertainties in drought events. Therefore, the Dempster-Shafer (D-S) evidence theory and the evidential reasoning algorithm were introduced, and the DRI values were calculated with consideration of uncertainties of the three indices. The drought entropy and evidential reasoning algorithm were used in a case study of the Haihe River Basin to assess water security risks during drought periods. The results of the new DRI values in two scenarios were compared and analyzed. It is shown that the values of the DRI in the D-S evidence algorithm increase slightly from the original results of Zhang et al. (2005), and the results of risk assessment of water security during drought periods are reasonable according to the situation in the study area. This study can serve as a reference for further practical application and planning in the Haihe River Basin, and other relevant or similar studies. 展开更多
关键词 risk assessment water security drought periods entropy D-S evidence theory "evidential reasoning algorithm Haihe River Basin
下载PDF
A STUDY OF FUZZY LOGICAL PETRI NETS AND ITS APPLICATION 被引量:1
4
作者 Jiang Changjun(Dept. of Comp. Sci. & Eng., Tongji University, Shanghai 200092 Dept. of Comp. Sci., Inst. of Shandong Mining & Tech., Taian 271019Inst. of Soft., The Chinese Academy of Sciences, Beijing 100080) 《Journal of Electronics(China)》 2001年第1期70-78,共9页
In this paper, a fuzzy Petri net approach to modelling fuzzy rule-based reasoning is proposed. Logical Petri net (LPN) and fuzzy logical Petri net (FLPN) are defined. The backward reasoning algorithm based on sub-fuzz... In this paper, a fuzzy Petri net approach to modelling fuzzy rule-based reasoning is proposed. Logical Petri net (LPN) and fuzzy logical Petri net (FLPN) are defined. The backward reasoning algorithm based on sub-fuzzy logical Petri net is given. It is simpler than the conventional algorithm of forward reasoning from initial propositions. An application to the partial fault model of a car engine in paper Portinale's(1993) is used as an illustrative example of FLPN. 展开更多
关键词 Logical Pe+-i net Fuzzy logial Petri net reasoning algorithm
下载PDF
A hierarchical analytical model for performance management of integrated logistics 被引量:2
5
作者 Mahamaya Mohanty Ravi Shankar 《Journal of Management Analytics》 EI 2019年第2期173-208,共36页
In this paper,a holistic hierarchical analytical model is proposed to assess the performance of enablers in an integrated logistics system.Due to the ambiguous and complex environment,various refinements are needed to... In this paper,a holistic hierarchical analytical model is proposed to assess the performance of enablers in an integrated logistics system.Due to the ambiguous and complex environment,various refinements are needed to assess enablers and prioritize for the criteria such as economic,operational,and environment.The proposed hierarchical model is developed by a systematic approach that includes fuzzy analytical hierarchy process(FAHP),triangular fuzzy numbers(TFN),an evidential reasoning algorithm(ERA),and expected utility theory(EUT).The FAHP is used to analyze and obtain the weights of the criteria by considering the expert’s opinions.ERA is used to synthesize the enablers based on the selected criteria.These enablers are represented using subjective assessment along with a set of evaluation grades for a qualitative attribute.EUT helps in obtaining crisp values of enablers for their performance estimation.With these set of methodologies,a hierarchical model is proposed that prevent low flexibility and inadequate appropriateness of the proposed model.Further,the model helps in scenario generation for the logistics professionals who are facing various problems in integrating logistics and incorporating sustainability due to lack of appropriate methodologies and evaluation techniques.Finally,sensitivity analysis is used for overall model validation. 展开更多
关键词 fuzzy analytical hierarchy process(FAHP) evidential reasoning algorithm(ERA) triangular fuzzy numbers(TFN) expected utility theory(EUT) integrated logistics SUSTAINABILITY
原文传递
上一页 1 下一页 到第
使用帮助 返回顶部