Browsing by Author "Zhao, Yiyuan"

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    Automated Route Planning and Optimizing Software
    (Minnesota Department of Transportation, 1997-02) Gini, Maria; Zhao, Yiyuan
    This report presents the results of a study of automated route planning and optimizing software to be used by Mn/DOT Metro Division and by Hennepin County for snow plow and for snow and ice control logistical planning. The study has: 1. Produced a uniform set of specifications for the two agencies; 2. Identifyed and analyzed a large number of commercially available software simulation packages for route and logistical planning; 3. Prepared recommendations on how to proceed with the project with a detailed analysis of their advantages and shortcomings.
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    Dynamics and Stability of Capsules in Pipeline Transportation
    (Minnesota Department of Transportation, 1996-05) Zhao, Yiyuan; Lundgren, Thomas S.
    This project studies a new system concept for freight transportation. The idea is to use capsules to transport cargos in concealed pipelines powered by linear electric motors. Such a concept advocates the separation of freight transportation from human movement and can be very effective in reducing the ever-increasing highway congestion problem. This report examines the technical aspects of such a freight pipeline system powered by linear induction motors. Forces acting on a capsule are first discussed, followed by the study of aerodynamic drag forces on a capsule and linear induction thrust forces. Stabilities of both a single capsule and a multiple capsule system are also discussed. These results reveal the basic characteristics of a freight pipeline system, propelled by linear induction propulsion. Various technical issues are discussed. Several related topics are recommended for future research.