The design method of system structure and every compositive section is introduced . the graphics edit platform is developed , including edit software of transformer substation ' s diagram and diagram for calculating line - loss , then the method of coding is introduced , especially the transition from diagram to matrix of conductance and susceptance 开发了本系统的图形编辑平台，包括变电站接线图编辑软件和网损接线图编辑软件，分别对变电站接线图编辑软件和网损接线图编辑软件的实现过程进行了阐述，详述了从矢量图表示的电网图转化成导纳矩阵的过程。
To aim at the disadvantages such as no entirety of semantic information and feature editing depending on the order of feature designing , a method that feature description graph express feature model is proposed . according to the method feature modified set is established through the law of the order of feature creating so that the complexity of reconstruct is reduced and the efficiency of feature editing is improved 同时针对传统特征造型系统中语义信息不完备、特征的编辑与设计历程相关联等缺点，提出了用特征描述图表示特征模型，根据特征生成顺序的判定准则来确定特征的关联修改集，减少了特征重构的复杂性，提高了特征编辑的效率。
Aiming at the existence of coal dust and gas in the coalmine environment and the special requirements of mine case explosion - proof surface process , the error conversion model , shape precision characteristics , transfer drawings , descriptive equation and error transfer structure chart in the production technological process of case accessories adopting the information flowchart of control theory are discussed , which simplify the traditional block diagram of technological process and represent the relationship of working procedure ( variable ) by information flowchart instead of miscellaneous block diagram 针对煤矿井下煤尘和瓦斯存在的环境特性、煤矿井用箱体防爆面加工的特殊要求，采用控制理论的信息流图，对工艺过程中传统方块图进行简化，使繁杂的方块图解采用信息流图表示工艺过程的工序（变量）之间关系。
By programming developed by user , the paper detailed researches the expressing method and identifying method of the component in the hierarchy assembly model , the description of three dimension position and orientation of the components in the product , and topological graph of mating relationship among the components . all these lay a solid foundation for the following research on assembly sequence and path planning and assembly process simulating 本文在pro engineer软件的基于特征的参数化技术建模的基础上，通过其二次开发平台，详细研究了pro e软件环境下的装配模型的层次结构的装配模型表达方法和部件标识机制，以及零部件在装配体中的空间位姿描述；还有零部件之间的配合联接关系的拓扑图表示法。
The concept of the graph form of a blocking optical cross - connector is introduced so as to investigate the blocking situation . the principle is that the blocking node can be replaced by a graph which is composed of nonblocking nodes and capacity limited edges . three graphs of typical optical cross - connector nodes are demonstrated . several uniform result are derived from these examples 该方法的基本思想是用图来替代交换能力受限制的节点，而此图由交换能力不受限制的节点和容量受限的边组成。文中以典型的阻塞oxc节点为例，给出了它们的图表示，并通过例子得出一般的oxc节点图表示求法的一些普遍结论。
Motion compensated prediction error image has significant amplitudes mainly along the boundaries of moving objects , correspondingly its wavelet coefficients contain large energy in high frequency bands . this greatly reduces the coding efficiency of ezw . it is first provided that the correspondence between the significant amplitudes area of the mcp error image and the wavelet coefficient significant map , then encode the significant map efficiently using quadtree approach , followed by bit - plane coding the significant coefficients to produce an embedded data stream . experiment result shows that compared to ezw and zte , the proposed algorithm is more efficient and has better performance 算法对于运动补偿余量误差帧首先进行小波变换，并选取适当的阈值，用重要图表示大于该阈值的重要系数。根据残差帧小波系数的统计特性，用四叉树方法编码重要图，并对重要系数作位面编码，生成嵌入式码流。实验表明，与ezw ， zte等算法相比较，该算法编码效率高，复现图像质量好。
