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手绘军队标号识别是基于草图的战场态势表达的重要组成部分.针对现有的草图特征手工提取方法费时费力,以及依靠数据驱动的深度学习方法泛化能力受到训练数据多样化制约的问题,提出一种注意力机制与卷积神经网络融合的军队标号识别方法.首先构建了特征提取模型Sketch-Net,实现手绘军队标号特征的初步提取;然后引入注意力机制模块,... 相似文献
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地图拼接是矢量地图数据中的一种常见处理方式。为了正确提取水印信息,需要从拼接后的地图中确定出水印嵌入区域。利用水印嵌入后坐标点尾部数据分布发生变化的特点,提出了一种基于分布拟合检验的抗拼接算法。该算法利用四叉树算法将地图分成多个区域,然后利用单样本K-S检验判断每个区域内的坐标点尾部数据是否服从均匀分布,最终确定出水印嵌入区域。实验表明,该算法能够达到提取水印嵌入区域的目的。 相似文献
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亚热带山区泥石流的形成过程 总被引:1,自引:0,他引:1
本文应用地貌学、水文学等方法进行了泥石流源地分类,阐述了各类源地泥石流形成过程,分析了各类源地的地貌演变对泥石流形成过程的影响。 相似文献
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据成因,把泥石流堆积地貌分为自然堆积地貌和人为堆积地貌。据堆积过程,把自然泥石流堆积地貌分为古泥石流台地、老泥石流台地和近代泥石流长柄扇。据建筑物引起的堆积形态,把人为堆积地貌分为泥石流堆积扇(锥)、回淤泥砾滩、侧积泥砾堤和堰塞洼地。 相似文献
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现代战争对作战所涉及的军事地理问题不仅需要定性分析 ,更需要定量分析。建立恰当的数学模型是实现定量分析的关键。文中对城市类战役要点进行了研究并建立了相应的数学模型。 相似文献
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隧道洞口段选址在滑坡体上的现象较为常见。以玉园隧道为工程实例,阐述了隧道洞口段滑坡地质灾害的成因及防治方法,通过数值计算针对性地提出该滑坡的应急处治措施。计算结果表明现有变形体为牵引式变形,卸载方案不利于其稳定,进而提出抗滑桩+降水、抗滑桩+旋喷桩2种方案,探讨2种处治方案的比较与选择,为类似的工程提供经验。 相似文献
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P. N. Dobbs Guo Yaping Hu Siyi Lin Jianrong Luo Lianquan Zang Jinsong Zhao Xiongying J. W. Harris 《Geological Journal》1990,25(1):47-59
A sedimentological study of the lower Quaternary sediments in southern Shandong Province suggests that they were derived from a northern highland area of Archaean gneiss and Palaeozoic sediments. Diamond-bearing kimberlites, intruded during the Ordovician, occur in the highland area and are a possible source of diamonds found in the Quaternary sediments. A warm and humid climate prevailed at the beginning of the Quaternary and braided rivers carried gravel and sand southeast towards the Yellow Sea. Cooler and drier conditions in Q2 times reconcentrated diamonds from the underlying Q1 gravels. Post-Q2 faulting deflected the drainage to the south and subsequent erosion left only small remnants of diamondiferous Q2 gravel. A study of diamond shape characteristics suggests that the diamonds in the Quaternary sediments were derived from the known kimberlites to the north, although the possibility of undiscovered kimberlites occurring beneath the Quaternary sediments cannot be ruled out. 相似文献
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Analytical solutions of the long-term consolidation deformation and excess pore water pressure due to fluid withdrawal from a saturated anisotropic porous elastic half space are presented. In the analysis, both the permeability and the elastic properties are considered cross-anisotropic. Cases of pervious and impervious half-space boundary are studied. The consolidation settlements as effected by the anisotropy and boundary conditions for pore water are illustrated and discussed. 相似文献
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