Besides, it has done some research on the problem of multi-Objective Optimization. Unitary method and gray theory have been introduced to improve on objection function.

本文还研究了多目标函数问题，采用归一化法和灰色理论方法对目标函数进行了改进。

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When that body mentioned corruption as a problem in the Russian financial system, Moscow raised no objection (and is said to have toughened its rules since joining).

ECONOMIST: The OECD and corruption