根据模型的结构特点，采用两级递阶优化方法进行求解。
The two-level hierarchical model optimization method is applied to find the solution.
针对城市交通信号控制系统建立具有递阶结构的非线性规划模型。
A model with hierachical structure is developed for urban traffic signal control system.
环境质量评价系统是由许多子系统组成的结构复杂、变量众多的多级递阶系统。
Environmental quality evaluation system consists of many subsystems. It is a complex and multilevel system.
环境质量评价系统是由许多子系统组成的结构复杂、变量众多的多级递阶系统。
Environmental quality evaluation system consists of many subsystems. It is a complex and multilevel system.
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