在发动机初步设计阶段，要根据对发动机的构型方案进行分析与评价，来选择发动机主要设计参数，并从多个发动机方案中选择最佳方案。
In the preliminary design phase of engine, engine configurations must be analyzed and assessed to choose main design parameters and to select optimal engine scheme from multiple candidates.
本文在对高等级公路勘察设计阶段应注意的高等级公路建设对环境影响评价进行分析的同时提出了解决措施。
This paper analyses the evaluation of the environment affection by the construction on the phase of highway reconnaissance and design, at the same time, points out the solution.
结构选型的设计过程包括方案生成、方案评价和方案决策三个设计阶段。
The design process of structural form selection includes three main stages, which are scheme generation, scheme evaluation and scheme decision-making.
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