数据模型可以采取自上而下的方法根据业务需求单独开发，也可以采取自下而上的方法通过对已有数据结构进行反向工程来开发。
The data model may be developed top-down solely based on business requirements or bottom-up through reverse engineering of existing data structures.
并且通过对模糊需求信息的建模，使设计检索模型更适合于表达设计重用的工程实际。
By modeling for the fuzzy requirement information, the model for design retrieval is more adapt to the design reuse engineering fact.
文章用系统工程的理论和方法，用系统模型和模拟的方法，分析系统内水资源的供给与需求。
Using system engineering theory and method, system model and simulation method, the paper analyses the conflict between supply and demand of water resources within the system.
需求模型的语义，如应用、工程、包、需求、文档、关系、讨论、属性值等。
Semantics of a requirements model, such as application, projects, packages, requirements, documents, relationships, discussions, attribute values.
其最终目的是为了给企业建模工具中的需求分析模型提供企业信息，从而使CIMS工程的实施能够更有效的进行。
The final purpose is to offer information for demanding analysis model in enterprise modeling tool, then we can actualize the engineering of CIMS effectively.
实践说明，通过该算法得到的复杂曲面的边界线能够满足模型重建的工程需求。
It is illustrated through practice that the border lines of complex curved surfaces obtained by means of this algorithm could satisfy engineering needs of model reconstruction.
在当前需求工程中有关多视点的研究基础上，本文提出了视点代理的概念，给出了代理模板的基本结构，并在此基础上简要介绍了关于模型转换及一致性检查等问题。
Based on the research of multi-viewpoint in the area of requirement engineering, we illustrate what the viewpoint delegate is, and discuss some problems about model transform and consistency checking.
传统的软件工程方法如瀑布模型，存在以下问题1：需求或设计中的错误往往只有到了项目后期才能够被发现。
Traditional software engineering has some disadvantages such as follows 1: defects exist in the requirement and designing only can be found in the late of the project.
本文通过引入自适应期望产量的概念，利用现代控制工程理论建立了市场非线性反需求函数下的自适应动态古诺模型。
By using a concept of adaptive expected output and modern control theory, a dynamic adaptive Cournot model, which the inverse demand curve function is nonlinear in the market, is established.
分析了并行工程的特征和组织需求，提出了面向并行工程的产品设计组织模型。
The paper analyzes the characteristics and organizing requirement of concurrent engineering, and advances an organizing model for concurrent product design.
通过对动态数据特性的分析，建立了以工程需求为驱动，由人员管理模型、产品对象模型及过程管理模型等组成的PD M应用框架。
By analyzing dynamical data and engineering (requirement -) driven, PDM application frame is set up including person managing model, product object model and process managing model.
在平台设计方面从软件工程的角度出发，针对公文流转业务对系统进行需求分析，并抽象出数据对象模型。
From a software engineering perspective, the design of this platform targets on the requirement analysis of document flows to the system, and the abstraction of the data-to-object model.
该文依照工程化的思想，以容灾系统生命周期模型为基础，提出了容灾系统的需求分析和设计方法，并对主要的容灾技术进行了比较分析。
Based on this model, a new method for disaster tolerance system analysis and design is proposed and discussed. At last main disaster tolerance technologies are compared.
本论文针对污水处理工程的环境效益定量分析的需求，提出了城市污水处理系统对环境影响的LCA模型。
This paper aimed at quantitative analysis of environmental benefits in sewage treatment works, proposed a LCA model of urban sewage treatment system on the environmental impact.
在一个较长的规划期内，分阶段按需求考虑各项规划工程的建设显然比静态模型的使用更符合实际。
The project construction in a long term planning period is determined according to demand in each stage. The model is more close to practice by comparison with the static model.
特征模型本质上也是一种需求的组织方式，在以产品线工程为基础的应用系统开发活动中，特征模型为该系统的需求提供了一个复用的框架。
Feature model is a form of organizing requirement essentially, which provide a reusable framework for the requirement of the application system in the development of it based on SPL.
在对集成化公路CAD系统中数据流程及数据需求分析的基础上，为系统数据的存储构造了不同数据结构形式，为工程数据库的建立提供了建库模型。
Ba sed on the analysis of the data of integration CAD system of highway, the different data structures to store the system data are developed for building data mod el of engineering database.
通过实际工业数据仿真表明，这两种方法均具有计算速度快、模型精度高的特点，适合实际工程应用的需求。
Simulation results with factual industrial data demonstrate that the two methods are both fast in computation and accurate in prediction, so they are suitable to practical application.
在IDEF0的基础上，针对钢结构CAD系统的数据流程和功能需求进行了有效地分析，提出了适应工程CAD系统的功能模型的分析方法。
Some improvement ways based on the IDEF0 are given for CAD system in the paper. If they can be applied effectively, the design efficiency will …
在IDEF0的基础上，针对钢结构CAD系统的数据流程和功能需求进行了有效地分析，提出了适应工程CAD系统的功能模型的分析方法。
Some improvement ways based on the IDEF0 are given for CAD system in the paper. If they can be applied effectively, the design efficiency will …
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