The symbolic coding method is simple and easy to use in that the model is solved by using genetic algorithm .

在应用遗传算法求解优化设计模型中，采用 符号 编码方法，具有简单、易用的特点。

Based on the foundation theory of applied symbolic dynamics we get a practical method of chaos secret coding i.e. use the strange attractor of logistic map to produce the symbol secret key to modulate the source code .

基于实用 符号动力学的基础理论，提出了一种实用的混沌保密 编码方法，该方法借助于单峰的logistic映射处于混沌吸引子状态时产生的符号序列作为密钥，对信源编码信号进行加密。

The symbolic coding vector and raster storing structure of map symbols are introduced in this paper the pattern symbol library and a design of the management sub system of the pattern symbols for multi resources geoinformation systems are established primarily .

阐述了多源地学信息系统图式 符号库的 编码、图式符号的矢量、栅格存储结构，并初步建立了图式符号库及图式符号库管理系统。