With consideration of the effect of vehicle density on travel speed in the road link,the weighted density of road link was defined to represent the road link state when vehicles enter into the road link.

For lack of sparseness characteristic in support vector machines(SVM) by least squares solution(LSSVM),a density weighted pruning algorithm to improve the sparseness of the LSSVM regression model is investigated.

Furthermore,another two new aggregation operators are put forward: two-dimensional density weighted arithmetic averaging operator(TDWA) and two-dimensional density weighted geometric averaging operator(TDWGA).

This paper studies the method of restraining direct-arrival wave of passive radar based on outside radiation source,which adopts the adaptive technique of phased array radar,generates zero falling in the direction of direct-arrive wave to restrain the jamming by adjusting weighted vector.