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分流水道体系分形几何特征
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作者 董宇 路秀琴 《淮南矿业学院学报》 1995年第2期8-13,共6页
本文运用分形几何理论对五种不同类型的分流水道体系进行了分维度量,结果表明不同类型分流水道体系具有不同的分形特征,在下三角洲平原中分流水道体系的分维与环境物理参数关联密切.低分维对应大的滨外坡度和平均波浪功率;高分维则相反.
关键词 水系 几何 结构参数 三角洲 瓦底江
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Schistura megalodon species nova, a new river loach from the Irrawaddy basin in Dehong, Yunnan, China (Teleostei: Cypriniformes: Nemacheilidae)
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作者 Marco Endruweit 《Zoological Research》 CAS CSCD 北大核心 2014年第5期353-361,共9页
A new species of river loach, Schistura megalodon sp. nov., is described from the Irrawaddy basin in Yingjiang County, Dehong Autonomous Prefecture, Yuunan Province, China. The following combination of diagnostic char... A new species of river loach, Schistura megalodon sp. nov., is described from the Irrawaddy basin in Yingjiang County, Dehong Autonomous Prefecture, Yuunan Province, China. The following combination of diagnostic characters serve to distinguish it from all other congeners in the given zoogeographical region: a large processus dentiformes in the upper jaw, a short pre-anus length of 65.4%-66.3% of SL, long paired fins (pectoral: 20.8%-24.2% of SL; pelvic: 17.9%-20.6% of SL), a wide body of 9.7%-11.3% of SL at anal fin origin, an incomplete lateral line, the absence of an orbital lobe, and a broad and distinct basicaudal bar with forward extensions. 展开更多
关键词 Schistura megalodon Irrawaddy Dehong YUNNAN
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