It is concluded that regression analysis and trend analysis methods apply to forecast based on large sample and a developing mode consistent in the past, at present and in the future, while grey model method applies to forecast under poor information condition.
The change s of se ismic frequency with time are studied using grey model method, and the ti me of the biggest change rate is take as original time of the mainshock.
The change s of se ismic frequency with time are studied using grey model method, and the ti me of the biggest change rate is take as original time of the mainshock.
It is concluded that regression analysis and trend analysis methods apply to forecast based on large sample and a developing mode consistent in the past, at present and in the future, while grey model method applies to forecast under poor information condition.
Highway freight volume in future year in Changchun’city is predicted by four quantitative estimation method which are regression forcasting method, grey model method, exponential smoothing method, method of set pair analysis classified prediction.
Combined with the Grey Model method to predictthe future distress condition and Load-carrying capability,this paper develops costand benefit analysis of the repair and rehabilitation projects and projects priorityprogramming.
Analyzing all kinds of influences of minimum wage and researching minimum wage measurement method, thesis gives some measurement methods, in which we find Grey model method、econometric model、 neural net method、 Martin method and expanded Linear Expenditure System method.
The changes of seismic frequency with time are studied using grey model method, and the time of the biggest change rate is taken as original time of the main shock.
This paper discusses briefly the characteristics of the grey forecasting method and suggests three new data processing methods: index smoothing method, envelope curve and grey model method in establishing the grey forecasting model. These methods were applied in the agriculture forecast of City D, JiLin province. Good results are obtained in the use of these methods.
In this papen,some promlems how to establish the grey forecasting models of quality control in cytindrical centerless grinding have been discussed,and the meehods of establishing the dynamic forecasting model with the recarsive compensation by the grey numbers of indentical dimensions have been studied mainly,the forecast and control by either interral grey namhers or grey model method has also been investigated preliminarily,The forecasting presision has been tested by expariment.
This paper mainly analyses the atmospheric environmental pollutant concentration and establishes their mathematical model based on the atmospheric environmental monitoring data of the urban area of Jiaozuo city by the grey model method. It has predicted the change tendency of this area in the future and suggested the deductive assessments of the atmospheric environmental quality of this area. The results indicate that the atmospheric environmental quality will worse if there is no series of effective measures...
This paper mainly analyses the atmospheric environmental pollutant concentration and establishes their mathematical model based on the atmospheric environmental monitoring data of the urban area of Jiaozuo city by the grey model method. It has predicted the change tendency of this area in the future and suggested the deductive assessments of the atmospheric environmental quality of this area. The results indicate that the atmospheric environmental quality will worse if there is no series of effective measures to be taken to improve environment management.