超声成像数字波束形成算法研究 - docin.com豆丁网 表示扫描声束总数。当c为定值时,扫描深度越深,波束越密,则帧率越低。 2.2延时叠加波束形成算法 延时叠加波束形成(delay andsum,DAS),是超声成像中最传统、最简单的、 也是目前实际当中应用最广泛的成像方式。 器‰ ‰ bj哪qE
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The fact of having already utilized it will allow me to shorten my argument and to sum it up without delay in a particular example.
事实上,因为我们已经采用了这种方面,论述也会就此而缩短,我们只需要用一个特殊的例子便能加以总结。
Photonic RF phase shifters based on OTTD (optical true time delay), heterodyne mixing technique and vector sum technique were introduced. The principles and features were proposed and analyzed.
介绍了基于光实时延迟线、基于外差混频技术和基于矢量和技术的光子射频移相器,对其工作原理和技术特点作了分析。
The sum of forward and backward delays of different packets is regarded as one packet's'round-trip delay'.
把不同分组在两个方向上经历的最小时延之和看成是同一个分组经历的“往返时延”。
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