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|  | | 为了更好的帮助您理解掌握查询词或其译词在地道英语中的实际用法,我们为您准备了出自英文原文的大量英语例句,供您参考。 | |
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| | The paper presents a method of lake bottom sediment classification using echo signals provided by a wideband active sonar. The five types of sediments are silt. rocks. pebbles. sand. and mixture of sand and gravel. Different sub-band divisions for frequency domain feature extraction are compared and it is shown that the contant Q method provides better results in comparison with the constant bandwidth method. Using a standard feedforward BP network, 82. 1% correct classification$$... | | 本文论述如何运用实际宽带主动声呐的回波信号识别湖底沉积物介质类型。五类湖底沉积层介质分别为:淤泥、岩石、孵石、沙、沙/砾石混合层。比较了等Q和等带宽两种子带能量频域特征提取方法,确认了等Q方法的优点。应用标准前馈BP人工神经网络结构,对五类湖底沉积层介质的平均正确识别率达到82.1%。 | | 文摘来源 | | In this paper, the bottom sediment classification method by using high precision multibeam bathymetric data is discussed. The statistical characteristics for specified sampling window units are extracted from the bathymetric data, and the cluster analysis method is then used to classify the sampling window units. The classified results are compared with the surface bottom sediment survey results and the multibeam sonar classified results, and it is shown from the comparison res... | | 探讨了基于高精度多波束水深数据的底质分类方法。对高精度水深数据按一定采样窗口单元提取统计特征;利用聚类分析方法对采样窗口单元进行分类;将分类结果与表层沉积物底质调查结果以及声纳分类结果相对比,发现三者具有一致性。此方法可以用来识别基岩、砾石、沙和粘土等底质类型。 | | 文摘来源 | |   |
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