| 1. | As a result , a study frame about hecad is provided under the new technology conditions . 2 ) to solve the problems such as large grain system , long development period , bad expandability , bad integration ability and so on in hecad software development , the grain division , classifying method , developing strategy , attributes , model , interface , reusing design etc . about a system is studied deeply , which should be solved firstly before developing a system . consequently , a domain analyzing and system plan tool about hecad is developed to study the problem of environment harmony among systems
2 )针对水工cad软件开发中长期存在的系统粒度大、开发周期长、系统的可扩展性、可集成性差等问题，深入研究了系统的粒度、系统的分类、系统的开发策略、系统的属性、系统的模型、系统间的接口关系、系统的复用设计等在开发一个系统前必须了解和掌握的关键问题，并通过一个水工cad领域分析和系统规划原型系统的开发，研究和解决了一个系统和其它相关系统的环境协调性问题。 |
