... 黑白电子圆图 black and white electronic circle； 黑白对称 black and white symmetry; 黑白花纹 magpie; ...
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black-and-white symmetry [晶体] 黑白对称
The black and white salesman problem (BWTSP) is a new NP-hard problem, which can be divided into the undirected BWTSP and the directed BWTSP according to the symmetry of edges in graph.
黑白旅行商问题(BWTSP)是近年来出现的新NP -难解问题，根据图中边是否对称可以分为无向BWTSP和有向BWTSP两种。
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