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    题名 作者 年代 出处 被引量
1On analyzing space-time distribution of evaporation duct height over the global ocean显示文摘The statistical features of the evaporation duct over the global ocean were comprehensively investigated with reanalysis data sets from the National Centers for Environmental Prediction.These data sets have time and spatial resolutions of 1 h and 0.313°×0.312°,respectively.The efficiency of the analysis was evaluated by processing weather buoy data from the Pacific Ocean and measuring propagation loss in the Yellow Sea of China.The distribution features of evaporation duct height(EDH) and the related meteorological factors for different seas were analyzed.The global EDH is generally high and demonstrates a latitudinal distribution for oceans at low latitudes.The average EDH is approximately 11 m over oceans beside the equator with a latitude of less than 20°.The reasons for the formation of the global EDH features were also analyzed for different sea areas.YANG Kunde ZHANG Qi SHI Yang HE Zhengyao LEI Bo HAN Yina 2016Acta Oceanologica Sinica2016,35,7:8
2基于经验模式分解的信息隐藏研究显示文摘提出了一种基于经验模式分解的信息隐藏算法.将一幅索引图像分解成6个基本模式,用秘密信息代替其中一个模式重构原图后,把重构的图作为公开信息传输,最后再从重构图中提取秘密信息.利用归一化互相关函数和峰值信噪比对算法进行评定,并对含有秘密信息的图像进行攻击.结果表明,信息隐藏算法具有较好的透明性和鲁棒性.张学敏 平子良 赵志芳 2010内蒙古师范大学学报(自然科学汉文版)2010,39,3:1
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