City gas load is a multi-mode and complicated engineering system. This paper analyzes and estimates the gas load of Shenzhen by using method of time series analysis.
城市燃气负荷是一个多工况、复杂的工程系统，本文采用时间序列方法对深圳的燃气负荷进行了分析和预测。
Using system engineering theory and method, system model and simulation method, the paper analyses the conflict between supply and demand of water resources within the system.
文章用系统工程的理论和方法，用系统模型和模拟的方法，分析系统内水资源的供给与需求。
On principle and method of an expert system, an engineering standard that fits both the multi objective function and the multi objective optimum solution space was established.
运用专家系统原理与方法，确定了既是建立多目标函数的规则，又是辨识和评价最优解空间标准的工程规范。
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