A layout algorithm based on the multi granularity model was proposed by adopting strategies of both constraint problem solving and backtracking.
综合约束问题求解和回溯控制策略，给出了在粒度分层模型基础上的布局算法。
Constraint propagation is a method for solving constraint satisfaction problem (CSP).
约束传播算法是求解约束满足问题的一种重要方法。
At last, we discuss the problem of solving implicit constraint by parameter reasoning.
同时对运用参数推理解决隐含约束进行了探讨。
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