The vitual business circle comes into being in the condition that the substantiality store transforms to the internet marketing, and the mode of internet marketing also brought out the chang of the virtual business circle.

According to the connotation of the retailing virtual business circle, the paper makes an analysis of this circle based on four aspects,and the authors put forward three economic features of the retailing virtual business circle.

Designs for virtual loops based on fast matching algorithm;

A pre-procession method to extract the vehicle feature was presented in this paper,which combined the detection line and virtual loops.

The colorized virtual loops blocking algorithm is used to detect red lights runners and catch process of peccancy.

The design and implementation of traffic atlas based on virtual loop technology

The article puts forward a measure of collecting video communicational data by adopting virtual loop technology which acquires preferable effect in practice relative to traditional embedded loop.

This paper is about to deeply comparing these two methods by comparing the basic materials and analyzing the two basic problems which are characteristics detection and following, and comparing the methods of connecting and virtual coil, then by using the method of model matching we can process the video vehicle detection.

Using vehicle detection method with virtual coil and cooperating with traffic signal controller,this system could detect vehicles which violate red-light.

The virtual consultation system is limited because there is no normalized model to support it.

A 3D Web virtual marketplace system was introduced.