This paper begins with the analysis of the structure of a relational schema R〈U,F〉(F is set of a minimal cover) that satisfies 3NF, and gives a decision algorithm of BCNF for a relational schema that satisfies 3NF.
By the methods of geostatistics,this paper analyzed the temporal structural characters and autocorrelations of the population dynamics of second generation cotton bollworm(Helicoverpa armigera)in Binzou City of Shandong Province in 1965—2004.Optimal simulation models were selected based on the decision coefficient R2 and Akaike's Information Criteria(AIC).
运用地统计学方法,分析了山东省滨州地区二代棉铃虫在1965-2004年间种群动态的时间序列结构特征和自相关性,根据决定系数R2和Akaike's Information Criteria(AIC)判别参数,筛选出最优拟合模型。
By decomposing the major cone, which is non-pointed, non-convex and non-closed into a finite union of disjoint strictly supported pointed convex cones, we discuss the continuous perturbations of the decision space.
A new decision criterion is given to select a satisfactory applicant.
Furthermore, that the proposed techniques in this paper allow the decision-maker to assign a different degree of importance can provide a useful way to efficiently help the decision-maker make their decisions.
This paper considers a consumption and investment decision problem with a higher interest rate for borrowing as well as the dividend rate.
The obtained results gener alize relevant conclusions about investment theory, and can better guide investors to make their investment decision.