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ystem in prof。 wang’s lab。 with the tool of opengl and matlab, i designed a simulation program for transportation scheduling system。 it is now widely used by different research groups in nust。 in 1998, i assumed and fulfilled a sewage analysis amp。 dispose project for nanjing sewage treatment plant。 this was my first practice to convert a laboratory idea to a mercial product。 in 1999, i joined the distinguished professor yugeng _is research group aiming at network flow problem solving and heuristic algorithm research。 soon i was engaged in the fudan gene database design。 my duty was to pick up the useful information among different kinds of gene matching format。 through the parison and analysis for many heuristic algorithms, i introduced an improved evolutionary algorithm multipopulation genetic algorithm。 by dividing a whole population into several subpopulations, this improved algorithm can effectively prevent ga from local convergence and promote various evolutionary orientations。 it proved more efficiently than sga in e_periments, too。 in the second semester, i joined the workshopscheduling research in shanghai heavy duty tyre plant。 the scheduling was designed for the rubbermaking process that covered not only discrete but also continuous circumstances。 to make a balance point between optimization quality and time cost, i proposed a dynamic layered sched uling method based on hybrid petri nets。 the practical application