The property and the differential characteristic of maximum likelihood direction-of-arrival estimation (MLE)function for every variety of centrosymmetric array are investigated in the paper.
本文着重讨论了在任意几何中心对称阵列条件下的最大似然方向估计函数的性质及其在信源真实方向上的微分特性。
Just with its initiation, quick characteristic and new media function, handset short-information is putting a challenge to this direction.
手机短信正是以其个性化、方便快捷和互动自主等特点和新型的多媒体功能，向这个方向发起了挑战。
This paper states the characteristic of engineering bill bidding and its working program to provide direction function for implementing engineering bill bidding.
本文论述了工程量清单招标特点及其工作准备和工作程序，对指导实施工程量清单招标具有指导作用。
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