Among given variables describing a BF system, the main variables influencing the selected target function were found out according to the minimum residual path coefficient of path analysis.

利用通径分析中的最小剩余通径系数，在给定描述高炉系统的诸多变量中，确定影响目标函数的主要变量因素。

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At Kenley, Spitfires from No 616 South Yorkshire Squadron were scrambled to the Dover and Dungeness area of Kent and found themselves in a fight with Messerschmitt Bf 109s.

BBC: Battle of Britain hero William Walker dies aged 99