Through the analysis of the urban public transportation system, a new theoretical model based on GIS isochrone approach is put forward and a design prototype is described with an isochrone analysis.
提出了基于GIS等时线分析方法的理论模型，以城市公共交通运输系统的主要工具——公共汽车和城市火车为例，描述了等时线分析的设计原型。
According to the field observation, model test and theoretical analysis, the schemes for anti-icing method of ship lock gate are put forward in this paper.
文章通过现场观测、模型试验、理论分析等手段和方法对该问题进行了初步研究探讨，提出了船闸闸门的防冻防冰措施方案。
The concept of forming prototypes was put forward to construct a theoretical model about the projective relationship, and it was pointed out that the key profiles represent forming prototypes.
本文提出造型原型的概念，建立了数控机床内部结构到外观造型的关系模型，并且指出关键轮廓是造型原型的表现形式。
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