An optimal combination forecasting method at sample point was set up in this paper,then,two methods of assesing weight coefficient of combination forecasting method were put forward, finally ,a practical case to explicate the rationality and practicability of the methods were given.

Improved algorithm for finding the sample points of algebraic decomposition on plane;

Combined with weighted filtration to successful sample points,it uses the method of sampling in three-dimensional space and range constraint to acquire three-dimensional coordinates of nodes.

Realization of this method will be followed by two steps:First,choose the sample space Ω according to the essential characteristic of event A for which probability will be calculated let the sample space satisfy the condition of "limited、 equiprobable" and AΩ;second,calculate the sample points numbers and nΩ and mΩ included in the Ω and A.

An new method for selecting sampling points in response surface method;

The response surface method (RSM) for structural reliability analysis is improved by proposing a new strategy for positioning sampling points.

Accelerated by the development of Probability Theory and Statistics and the trend of their combined use, application researches based on point sample analysis and modeling using nonparametric density estimation attract more and more attentions of researchers.

The compared results from delay data computed respectively through dot-sample method and HCM 2000 and simulation results show that PARAMICS fit for the intersection under mixed traffic environment in China because of its detailed parameter settings and driving behavior.