初步设计阶段 meaning in English
concept phase
conceptual phase
preliminary design phase
preliminary design stage
primary design stage
Examples
- Abstract : it is very important to estimate the basic parameters in helicopter preliminary design . neural network ( nn ) has the advantages in estimating accuracy and generalization over traditional methods . however , there are some difficulties in using nn , e . g . , how to select a proper network structure and the number of hidden layers . in this paper , structure and connection weight of a three - layer nn are optimized by genetic algorithm , and the optimized network is applied to helicopter sizing . the proposed method can not only give an optimal nn structure and connection weight , but also reduce the prediction error and has the capability of self - learning when the latest data are available . furthermore , this method can be easily applied to helicopter design systems
文摘:在直升机初步设计阶段估算其基本参数是很重要的.神经网络的通用性和精度比传统的估算方法有更多的优势,但是在应用神经网络时存在如何选择合适的网络结构和隐层节点数目等一些困难.应用遗传算法优化三层神经网络结构和连接权重,并将优化得到的网络应用于直升机参数选择中.该方法不但可以给出一个最优的神经网络结构和连接权重,而且降低了估算误差,具有及时应用最新数据学习的能力.此外,该方法易于在直升机设计系统中得到应用 - The traditional cad system is not quite competent as the tasks are finished mainly on the basis of the designer ' s knowledge and experience as well as his or her creative thinking in the stages of conceptual design and primary design for the reason that the knowledge and experience mentioned cannot precisely be described by use of digital model and 算法
由于概念设计和初步设计阶段要靠设计者的知识和经验再加以思考来完成，而这些知识和经验往往不能用精确的数字模型和算法来描述，传统的cad系统对此很难胜任。