Objective to investigate influence of smoking on cognitive ability in fighter pilots, so as to provide basis for measures improving flight performance.

目的探讨吸烟对飞行员认知能力的影响，为提高飞行员飞行能力提供依据。

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Performance measures are the relatively objective numbers resulting from a performance measurement system, and performance evaluations are the subjective judgement of managers.

绩效衡量是通过绩效衡量系统所提供的比较客观的数字，绩效评价是经理们主观的判断。

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Finally, using the objective adjusted return measures divided the study sample into positive and negative samples, empirical research on the influence of fund manager turnover on fund performance.

最后，运用目标调整收益率把研究样本划分为正、负样本，对基金经理更换对基金绩效的影响进行实证研究。

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