The Study Of The Assessment Platform Based On Plug-in Technology For Urban Near-roadway Quality

To build up an evaluation system of the RIA quality in the street is of great and directive significance for the management department to forecast the urban RIA condition. The evaluation system of the urban RIA quality are distinctive because of the different location and different time, the diffusion model is complicated and the evaluation data have to be reserved for a long time, which brings up some more strict requests to the evaluation system. But along with the development of the evaluation system, its weak points are becoming more and more obvious:small number, hard to couple or expand and lack of flexibility which make it inappropriate according to the demand of different type of cities.The platform is based on three different types of road:open road, cross road and canyon street, taking CaLine4 and OSPM-two different kinds of diffusion models as the research object. After studying the OSGi criterion, the appliance of OSGi under the plug-in framework and the Flex modularization technology, a new plug-in framework is brought up and a new platform is designed for evaluation of the urban RIA quality based on plug-in framework. This platform obeys the OSGi criterion, turns the task object into a plug-in (Bundle) and a plug-in manage center is designed which named PMSC(Plug-in Manager Server Center). What a more, a Flex RIA(Rich Internet Applications) is based on modularity on the performance layer.It fully manifested the loose coupling developed for the plug-in framework, and its characteristics like its openness, hot plug, easy to expand and transplant, and the consideration to both efficiency and safety. It is also a valuable attempt to combine OSGi and Flex together which will be beneficial to the improvement of the general standard of evaluation system of the urban RIA quality.