Research of reusable vector graphic element of GIS based on composite pattern;

A new industry-oriented method was proposed to solve the problem that current SVG graphic element databases are all based on specifically industry.

Analysis and discussion were made upon the selection of most important graphic element in plotting system of mechanism s motion diagram designed by the authors.

The performance,designing method and primitive growing algorithms are analyzed.

To reduce the complex operation steps in graphics designing and drawing software, an online hand-sketched graphics recognition method is proposed for flow chart based on geometric features of graphics unit.

The geometric graphics drawn through devices(Tablet,Light pen,Digital pen etc) are recognized by the method based on graphics unit.

Meta-graph-based Algorithm for Composing Event Graphs;

In SSA,we designed a transformation algorithm to implement very large SVG entity classification;then some SVG meta-graphs were extracted from SVG entity,SVG class and SVG object and saved to RDBMS.

Therefore,a new type of graphical structure-metagraphs was introduced,an integrated workflow model of elementary activity unit was proposed base on metagraphs,and the correctness of this type of workflow was defined.