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Very often trees appear in computer science. For example, information is often stored in treelike data structures and the execution of many recursive programs can be regarded as a traversal of a tree. Moreover, trees are efficiently used to verify many very difficult problems which are still open now. As known, leaves in a tree play an important role in the Steiner tree problem. We show that a connected...
Common mode noise produced in single-phase full-bridge converter with bipolar SPWM is analysized. Common mode noise level evaluation method must be monodromy value and calculated simply in common mode EMI suppression system. The three evaluation indexes of maximal spectrum, average spectrum and common mode noise energy are proposed to express the common mode noise level. The computational complexity...
This paper describes a new design of Tabu search (ts) algorithm for solving the vehicle routing problem with time windows (VRPTW). Since VRPTW is a well known NP-hard problem, heuristic algorithms such as Tabu search are always used to get a good approach. The former published designs of TS usually focus on the neighbor structure, the relaxation to the objective function or the multi-period algorithms...
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