第三部分为城市旅游空间结构系统。
The third part is the system of urban tourism spatial structure.
结合大直径圆筒结构算例的计算分析，证实这一方法在求解无限域或半无限域介质中弹性空间结构系统时，是一种很有效的方法。
Numerical examples and the analysis of a large-diameter cylinder show that the proposed method is quite efficient in solving elastic spatial structure problems.
主要对城市旅游空间结构系统的相关概念进行了界定，对城市旅游空间结构系统的特性、构成要素及其空间演化机制进行了阐述。
It mainly gives a definition and discrimination on connotation, and then , sets forth the characteristics, key elements and spatial changes of urban tourism spatial structure.
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