This paper puts emphasis on the discussion of constraint-based routing, its mathematical programming model is given and several common optimization algorithms are illustrated.
论文对基于约束的路由机制进行了重点论述，为其建立了数学规划模型，并给出了常用的优化算法。
There are also some new key techniques for the system here, such as data model, query language model, routing policy, query processing, optimization strategy, and bidirectional delivery mechanism.
给出了系统中的关键技术，包括数据模型、查询语言模型、路由策略、查询处理及优化策略，以及双向递交机制。
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