第1个回答 2011-08-12
From table 1 can see, for certainty of data, modeling the same principles and thick far and near BoYuan principle is used to make A value is the same; And for the uncertain data, on the whole two principle is used to make smooth coefficient not the same. The uncertain of the data, when B, the same principles and thick far and near the principle of BoYuan method and the coefficient of the smooth, is the same; When C, two principle is used to make a difference, smooth coefficient from D began to difference is more apparent, the smaller the difference, the E.
By investigating the thick BoYuan principle for the use of nearly formula, it can be seen that the G F values are critical. Change H value can change near the extent of the BoYuan thick, decided to different period of historical data model to predict the influence of the error. I value very hour, will make far away on final prediction model error influence on the result of the almost to zero; J, the greater the optimal values of the results in the same far more and more close to the principle of selecting the results, in other words, K value, the greater the effect of nearly BoYuan thick weaker.