However, the traditional DEA methods do not get out of the trouble of randomness in determining the effective frontier.
然而，由于传统DEA方法在确定有效前沿面方面还没有走出随机性的困境。
During Daoguang and Xianfeng, Qin dynastys frontier danger was vulnerable to attack on all sides, the effective frontier policy began to fail.
道光咸丰时期，清王朝边疆危机四伏，原来行之有效的边疆政策开始走向破产。
Objective To prevent the spreading of water-born infectious diseases, do effective surveillance on their pathogeny in Zhujiang water at the frontier port area.
目的通过监测口岸辖区内珠江水中水源性传染病病源，有效地预防水源性传染病在国境口岸的传播。
Therefore, seeking a safer, more convenient, more effective method for interruption of pregnancy and deepen this research is an important subject on the frontier of modern obstetrics.
因此，寻找更加安全、方便、有效的终止妊娠方法，加强此方面的研究，是当前产科临床不可忽视的重要课题。
Compare two kinds of hollow aqueducts which frontier walls thickness, and select one that is more effective to reduce the thermal stress.
本文对比分析了两种不同边墙厚度的空心渡槽对温度应力减小的效果，并从中选出一种更有效的空心渡槽。
Compare two kinds of hollow aqueducts which frontier walls thickness, and select one that is more effective to reduce the thermal stress.
本文对比分析了两种不同边墙厚度的空心渡槽对温度应力减小的效果，并从中选出一种更有效的空心渡槽。
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