Ternary Concept Analysis Theory And Application In Tongren Flue-cured Tobacco

In recent years,the yield and planting area of flue-cured tobacco in China have shown a decreasing trend,which has posed challenges and pressures to the local economic development.This dissertation proposes an incremental construction method for ternary context based on conditions,applied to analyze the yield and influencing factors of fluecured tobacco in Tongren City,aiming to put forward constructive measures to solve the problems encountered by flue-cured tobacco yield system in Tongren.Firstly,a condition-based incremental construction method is proposed,and an algorithm is designed to construct the ternary concepts accordingly.This algorithm investigates the impact of newly added conditions on the original ternary concepts by gradually adding conditions,including no change,update,generation of new ternary concepts together with the original ones,and generation of new ternary concepts alone.And then,all ternary concepts in the new context are generated,and a corresponding algorithm is designed.Secondly,the overall yield of flue-cured tobacco in Tongren City and each county,as well as the factors affecting flue-cured tobacco yield such as temperature,sunshine hours,precipitation,and labor area ratio are analyzed.And the problems in the flue-cured tobacco yield system of Tongren City are summarized.Finally,adopting the incremental construction method for ternary concepts,the fluecured tobacco yield data of each county in Tongren City is analyzed in-depth,generating ternary concepts based on the influencing factors of flue-cured tobacco yield and those based on flue-cured tobacco yield,and acquiring related decision rules,and the relationship between the influencing factors and flue-cured tobacco yield is studied.