【摘 要】
：
For a large-scale adaptive array, the heavy computational load and the high-rate data transmission are two challenges in the implementation of an adaptive digital beamforming system. An efficient para
【出 处】
：
Journal of Systems Engineering and Electronics
论文部分内容阅读
For a large-scale adaptive array, the heavy computational load and the high-rate data transmission are two challenges in the implementation of an adaptive digital beamforming system. An efficient parallel digital beamforming (DBF) algorithm based on th
其他文献
大果木莲种子具吸水性,胚未完全发育。新鲜种子25℃下的萌发率仅2%,在30/20℃和20/10℃的条件下30d内分别有27%和36%种子萌发。在20/10℃下,1000mg·L-1浓度的GA3可以有效打破种子休眠。冷层积120d的种胚生长不显著,大果木莲种子具有条件休眠特性,属于浅度简单型形态生理休眠。种子经冷层积60d的萌发率最高,而后下降,提示其可能有休眠循环现象。
2009年8月13～17日,在河南开封参加"中国植物生理学会第十次会员代表大会暨全国学术年会"之际,西北农林科技大学张继澍先生赠送我们一本石声汉先生1951年编著并于1952年由西北农学院出版的《植物生理学》,全书200余页,约27万
It has often been reported that, when building structures are subjected to near-fault earthquake ground motions, horizontal and vertical impulsive inputs may cause critical damage during the first few
China Land Observation Satellite Third User Conference with the theme of"Strengthening cooperation, enlarging sharing and promoting the application of domestic satellite data"was held on July 16,2009
针对当前海洋环境面临的严重的富营养化现状,利用大型海藻的吸收氮磷的能力可以有效治理和修复海洋的富营养化,实现海洋污染的生态修复。本文介绍了大型海藻主要营养盐物质(C、N、P)的吸收的其影响因素主要有物理因素、化学因素和生物因素等,大型海藻吸收营养盐的现状,研究方法,前景展望等。
An object model-based tracking method is useful for tracking multiple objects, but the main difficulties are modeling objects reliably and tracking objects via models in successive frames. An effectiv
目的利用双源CT图像对心脏二尖瓣瓣膜进行了增强与分割,为日后进行二尖瓣三维重建和运动分析提供基础。方法提出了自适应种子填充法和Contourlet小波变换分别用于不同情况下的分割:首先用自适应种子填充法对双源CT胸腔图像进行心脏在造影剂下的区域分割,再用Contourlet小波变换对区域分割后的图像进行二尖瓣的增强和分割。结果在MATLAB7.0的环境下对双源CT图像成功进行了处理和分割,获取了清
To solve the problems that exist in the color morphological sieves, a new fuzzy color morphological sieve is proposed.The method adopts color fuzzy model to define extrema and selects more rational re
A novel multi-view 3D face registration method based on principal axis analysis and labeled regions orientation called local orientation registration is proposed.The pre-registration is achieved by tr
An improved block matching approach to fast disparity estimation in machine vision applications is proposed, where the matching criterion is the sum of the absolute difference(SAD).By evaluating the l