In the case of unknown weights, theories of multi-attributed decision making based on interval numbers and grey related analysis were used to optimize mining methods. As the representative of independence for the indi...In the case of unknown weights, theories of multi-attributed decision making based on interval numbers and grey related analysis were used to optimize mining methods. As the representative of independence for the indicator, the smaller the correlation of indicators is, the greater the weight is. Hence, the weights of interval numbers of indicators were determined by using correlation coefficient. Relative closeness based on positive and negative ideal methods was calculated by introducing distance between interval numbers, which made decision making more rational and comprehensive. A new method of ranking interval numbers based on normal distribution was proposed for the optimization of mining methods, whose basic properties were discussed. Finally, the feasibility and effectiveness of this method were verified by theories and practice.展开更多
In this paper, the variation in fruit shape, size and its seed number were studied, and the correlativity of length and diameter of fruit to seed number for 12 species of \%Rhododendron\% from Zhejiang Province were a...In this paper, the variation in fruit shape, size and its seed number were studied, and the correlativity of length and diameter of fruit to seed number for 12 species of \%Rhododendron\% from Zhejiang Province were analyzed. Based on the fruit shape and the ratio of length to diameter, 12 species of \%Rhododendron\% L. Were divided into three types. The seed number varied in different species. \%Rhododendron ovatum\% had the highest seed setting efficiency, followed by the species of Subgen \%Tsutsusi\%. The variation of seed number among the individuals of the same species was more obvious than that of the fruit. There was a significant positive correlation between the seed number in fruits and the length, diameter of fruit in most species. The results showed that fruit morphology might be an important character in systematic studies of \%Rhododendron\% L.展开更多
基金Project(50774095) supported by the National Natural Science Foundation of ChinaProject(200449) supported by the National Outstanding Doctoral Dissertations Special Funds of China
文摘In the case of unknown weights, theories of multi-attributed decision making based on interval numbers and grey related analysis were used to optimize mining methods. As the representative of independence for the indicator, the smaller the correlation of indicators is, the greater the weight is. Hence, the weights of interval numbers of indicators were determined by using correlation coefficient. Relative closeness based on positive and negative ideal methods was calculated by introducing distance between interval numbers, which made decision making more rational and comprehensive. A new method of ranking interval numbers based on normal distribution was proposed for the optimization of mining methods, whose basic properties were discussed. Finally, the feasibility and effectiveness of this method were verified by theories and practice.
文摘In this paper, the variation in fruit shape, size and its seed number were studied, and the correlativity of length and diameter of fruit to seed number for 12 species of \%Rhododendron\% from Zhejiang Province were analyzed. Based on the fruit shape and the ratio of length to diameter, 12 species of \%Rhododendron\% L. Were divided into three types. The seed number varied in different species. \%Rhododendron ovatum\% had the highest seed setting efficiency, followed by the species of Subgen \%Tsutsusi\%. The variation of seed number among the individuals of the same species was more obvious than that of the fruit. There was a significant positive correlation between the seed number in fruits and the length, diameter of fruit in most species. The results showed that fruit morphology might be an important character in systematic studies of \%Rhododendron\% L.
