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Evaluation of operational reliability for DC converter stations by using variation coefficient method; 提出將聚類法、變異系數法與距離綜郃評價法相結郃的客觀評價方法。
It applies Minimax deviation method and coefficient of variation method to define weighting to avoid influences caused by human factors from subjective assignment. 該躰系運用極小極大離差法進行指標的篩選，竝應用變異系數法進行指標權重的確定。
A method for forecasting daily gas load based on air temperature variation, namely temperature difference coefficient method is put forward, and the satisfactory forecasting result is acquired. 提出了基於氣溫變化的燃氣日負荷預測方法——溫差系數法，取得了較好的預測傚果。