针对油田开发过程中地面工程系统的负荷率下降，效率降低，生产运行能耗升高的问题开展了研究。
In this paper, problems of dropping load rate, efficiency and rising operation energy consumption of surface engineering system during oil field exploitation are studied.
为提高复杂工程系统的风险评估和计算效率，对工程系统中复杂性和信息密度演化进行研究。
The methodology is to use the information entropy to measure the risk degree of complex engineering system, and evaluate its relativity with information density evolution.
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