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.
在此基础上，运用灰色系统的原理和方法，提出一种定性分析与定量分析相结合，以定量分析为主的阵地选择方案评价方法。
On this basis, a new method for evaluating the position selection schemes is presented on the principle of the gray system.
顾客的满意程度是评价与选择产品概念设计方案中要考虑的一项重要因素。
Customer satisfaction is an important index which should be taken into account in evaluation and selection of conceptual design schemes.
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