A Construction Method Of Triadic Concept And Its Application In Agricultural Development In Zhoushan

Triadic concept analysis is a new method of data analysis and information processing.It was put forward by German mathematician Wille R based on Pearce's category tripartite theory.Because the construction of triadic concepts is very complicated,there are few theoretical studies and practical applications of triadic concept analysis.Therefore,the construction of triadic concepts is one of the important problems in triadic concept analysis.This thesis presents a method of constructing triadic concepts and structures of concept granules comparing formal concept analysis and systematically studies the agricultural development status of Zhoushan city and various districts and counties.Then the agricultural data of Zhoushan city in recent years is deeply analyzed with triadic concept analysis.The main achievements and innovations of this thesis are as follows:Zhoushan agriculture development situation is studied systematically.The main problems existing in Zhoushan agricultural development are analyzed from the aspects of the geographical situation,meteorological characteristics,the yield of main agricultural products,the planting area of main food crops and the yield of Zhoushan,and the main factors affecting the agricultural development of Zhoushan are proposed.A method of constructing triadic concepts and structures of concept granules are developed.The properties of a triadic concept with empty set in its extent,intent and mode are studied.A special type of triadic concept is defined,which is called object-conditional triadic concept.An operation is defined on the set of object-conditional triadic concepts,and a method of generating triadic concepts based on object-conditional triadic concepts is proposed.The concrete steps of generating triadic concepts from object-conditional triadic concepts are given in detail.From the point of view of granularity,all the triadic concepts of a t triadic context and the binary concepts on the binary context determined by all conditional subsets are divided into three layers of concept granules.The concepts of binary object concepts determined by individual object and condition are the most basic concepts,and they play a decisive role in the generation of binary concepts and triadic concepts.Starting with the present situation of agriculture development in Zhoushan,the agricultural data of three districts(counties)in Zhoushan City,including Dinghai District,Putuo District and Daishan County are studied by means of triadic concept analysis.It mainly includes the change and proportion of rural labor force in recent 9 years,the planting area and proportion of crops,the total and average yield of crops,the area and proportion of effective irrigation,and so on.