As an efficient tool in handling uncertain issues, Dempster-Shafer evidence theory has been increasingly used in structural health monitoring and damage detection. In applications, however, Dempster-Shafer evidence th...As an efficient tool in handling uncertain issues, Dempster-Shafer evidence theory has been increasingly used in structural health monitoring and damage detection. In applications, however, Dempster-Shafer evidence theory sometimes leads to counter-intuitive results. In this study, a new fusion algorithm of evidence theory is put forward to address various counter-intuitive problems and manage the reliability difference of the evidence. The proposed algorithm comprises the following aspects:(1) Dempster's combination rule is generalized by introducing the concept of evidence ullage. The new rule allows classical Dempster's rule and can resolve counter-intuitive problems cause by evidence conflict and evidence compatibility;(2) a reliability assessing method based on a priori and posterior knowledge is proposed. Compared with conventional reliability assessment, the proposed method can reflect the actual evidence reliabilities and can efficiently reduce decision risk. Numerical examples confirm the validity and utility of the proposed algorithm. In addition, an experimental investigation on a spatial truss structure is carried out to illustrate the identified ability of the proposed approach. The results indicate that the fusion algorithm has no strict request on the accuracy and consistency of evidence sources and can efficiently enhance diagnostic accuracy.展开更多
Thomas Aquinas' s concept of natural law propounds two universal values: self-preservation and living-with-others. They are equal and symmetrical in any specif ic social relationship. Living-with-others is the mos...Thomas Aquinas' s concept of natural law propounds two universal values: self-preservation and living-with-others. They are equal and symmetrical in any specif ic social relationship. Living-with-others is the most reliable guarantee for self-preservation; self-preservation provides the best standard for living-with-others. This opens up new opportunities for resolving confl icts between the developer and objector in land development.展开更多
The short story"To build a Fire"by Jack London tells about the relationship between man and nature. Involving such themes as fear, death, and the individual versus nature,‘‘To Build a Fire''is a na...The short story"To build a Fire"by Jack London tells about the relationship between man and nature. Involving such themes as fear, death, and the individual versus nature,‘‘To Build a Fire''is a naturalistic work of fiction in which Jack London depicts human beings as subject to the laws of nature and controlled by their environment and their physical makeup.展开更多
基金National Natural Science Foundation of China under Grant No.51708446
文摘As an efficient tool in handling uncertain issues, Dempster-Shafer evidence theory has been increasingly used in structural health monitoring and damage detection. In applications, however, Dempster-Shafer evidence theory sometimes leads to counter-intuitive results. In this study, a new fusion algorithm of evidence theory is put forward to address various counter-intuitive problems and manage the reliability difference of the evidence. The proposed algorithm comprises the following aspects:(1) Dempster's combination rule is generalized by introducing the concept of evidence ullage. The new rule allows classical Dempster's rule and can resolve counter-intuitive problems cause by evidence conflict and evidence compatibility;(2) a reliability assessing method based on a priori and posterior knowledge is proposed. Compared with conventional reliability assessment, the proposed method can reflect the actual evidence reliabilities and can efficiently reduce decision risk. Numerical examples confirm the validity and utility of the proposed algorithm. In addition, an experimental investigation on a spatial truss structure is carried out to illustrate the identified ability of the proposed approach. The results indicate that the fusion algorithm has no strict request on the accuracy and consistency of evidence sources and can efficiently enhance diagnostic accuracy.
文摘Thomas Aquinas' s concept of natural law propounds two universal values: self-preservation and living-with-others. They are equal and symmetrical in any specif ic social relationship. Living-with-others is the most reliable guarantee for self-preservation; self-preservation provides the best standard for living-with-others. This opens up new opportunities for resolving confl icts between the developer and objector in land development.
文摘The short story"To build a Fire"by Jack London tells about the relationship between man and nature. Involving such themes as fear, death, and the individual versus nature,‘‘To Build a Fire''is a naturalistic work of fiction in which Jack London depicts human beings as subject to the laws of nature and controlled by their environment and their physical makeup.
