中文摘要：

分析了基于Modelica语言的多领域物理系统混合建模平台的功能需求，采用基于组件的系统体系结构，完全从底层开发出可视化的图形建模工具——MWorks系统．提出一种基于句子的模型数据结构，实现了基于句子的图文动态编辑与转换；提出用于存储模型层次信息的三叉树结构，实现了基于实体集的模型子部件的块表达，以及系统模型库中可重用模型（部件）的拖放式建模．最后给出了系统建模实例．

英文摘要：

To meet the function requirements of Modelica-based hybrid modeling platform for multidomain physical system, a kind of COM-based system architecture is adopted and a totally self-developed visual graphical modeling system-MWoks is implemented. A sentence object and a kind of data structure of model object based on sentences are designed. Based on the sentences of a model, dynamic bidirectional eonvertion between graphics view （including Icon view and Diagram view） and text view of the model is realized. Also a trifurcate tree structure storing the information of the hierarchy of models is proposed. And then a block object based on the entity set representing a model＇s part is implemented, as well as the dragand-drop modeling from the re-usable models （i.e. components） in MSL （Modelica Standard Library） to the Diagram view of current model is realized. Finally a modeling instance on the MWorks system is given.