Mired-traffic that contains motorized and nonmotorized vehicles become more common in urban areas. Compare with motorized traflc, nonmotorized traffic flow theov isn't mature enough. In this studys a motorcycle traffic flow model is proposed It contains longitudinal and lateral movement models. The motorcycle traffic flow is influenced by driver characteristics, vehicle interactions, and the external environment all of which the proposed model will take into account. Finally, a motorcycle traflcflow simulation is presented The simulation result indicates that the proposed model is reasonable, and it can reflect some motorcycle trafic flow phenomena. The behuviors of bicycles and pedestrians are similar to motorcycles; the result of this study could be the basis of bicycle or pedestrian flow model.

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This paper studies a library materials problem in which materials are served for satisfying the information need of its patrons. The objective is to maximize the average preferences of acquired subjects. We first formulated the problem by means of the mathematical programming. Without loss of generality, some empirical constraints are considered, including subject costs and the required amount of specified disciplines. We then design a particle swarm optimization to resolve the problem. CPLEX, a linear programming software package, was used to break down the small problems and provided optimal solutions for comparison. Computational results show that the proposed algorithm can optimally solve problems within a reasonable amount of time.

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