computer aided design, san jose, usa, 1998, pp . 259-266.6 sakanushi k, nakatake s, kajitani y . the multi-bsg : stochastic approach to an optimum packing of convex-rectilinear approach to an optimum packing of convex-rectilinear blocks . in proc 从而在进行布图摆放得到布图结果之前,即可以对lt模块的子模块的位置进行修正,尽可能保证子模块之间的相对关系,提高布图搜索效率,避免对不合理解的搜索。