排序方式： 共有7条查询结果，搜索用时 15 毫秒
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Feng Xia-Ting Wang Zhaofeng Zhou Yangyi Yang Chengxiang Pan Peng-Zhi Kong Rui 《Acta Geotechnica》2021,16(6):1647-1677
Acta Geotechnica - Hard rocks exhibit three-dimensional (3D) stress-dependent failure under true triaxial compression. The deformability and strength of hard rocks under true triaxial compression... 相似文献
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以国家工信部公布的四批共164个国家工业遗产为对象,运用核密度、集中趋势演变等方法,探讨其时空分布特征与影响因素。结果表明：1）国家工业遗产在空间分布上具有显著的正空间自相关性,呈现东南多、西北少,并在空间上形成了“三核两副,片状分布”的格局;2）从遗产类型看,轻工业主要分布在长江流域及沿海区域,重工业较轻工业分布分散;3）工业遗产在省域范围内存在较为明显的三类区：Ⅰ类区在中国东北及东南沿海等“一线地区”,Ⅱ类区为中国西北部的“三线地区”,其他为Ⅲ类区;4）从时间演化看,工业遗产空间分布中心有4次明显转折;5）中国古代工业大多受自然地理及社会经济环境的影响,近现代工业虽受上述因素影响,但更多受民族主义驱动、洋务运动、“三线建设”等历史及政治因素的影响。 相似文献
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以甘肃北山花岗岩中发育的构造裂隙(主要指节理)为研究对象,采用高精度GPS、罗盘等对其进行现场测量,获取裂隙的迹长及产状信息,并将信息导入ArcGIS平台建立裂隙属性数据库; 进而应用地质统计分析理论,以裂隙面密度P21为地质统计分析的区域性变量,探索花岗岩岩体裂隙空间分布特征; 然后借助ArcGIS软件平台建立变异函数模型,利用地质统计学的普通克里金插值方法得到整个区域的面密度预测分布图。结果表明:芨芨槽块段所测某区域裂隙面密度值的半变异函数变程值在20～30m之间,NS和EW方向有明显差异,由此知该区域裂隙面密度分布具有显著空间自相关性,但分布特征不均匀; 此结论对北山花岗岩裂隙空间分布特征的深入研究以及三维裂隙网络建模具有重要参考价值。 相似文献
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Yang Na Xia Chunliang Yu Tao Zuo Xiaomin Sun Yangyi Yan Xiangxiang Zhang Jian Wang Jin Le Huijun Liu Libo Ward William Edmund 《中国科学:地球科学(英文版)》2021,64(11):2027-2042
Science China Earth Sciences - China’s Mars exploration mission has stimulated tremendous interest in planetary science exploration recently. To propose potential scientific research... 相似文献
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Acta Geotechnica - The rock failure process can be characterized by several distinct stress thresholds: the crack closure stress σcc, crack initiation stress σci, crack damage stress... 相似文献
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In this article, an automated solar flare detection method applied to both full-disk and local high-resolution H\(\upalpha\) images is proposed. An adaptive gray threshold and an area threshold are used to segment the flare region. Features of each detected flare event are extracted, e.g. the start, peak, and end time, the importance class, and the brightness class. Experimental results have verified that the proposed method can obtain more stable and accurate segmentation results than previous works on full-disk images from Big Bear Solar Observatory (BBSO) and Kanzelhöhe Observatory for Solar and Environmental Research (KSO), and satisfying segmentation results on high-resolution images from the Goode Solar Telescope (GST). Moreover, the extracted flare features correlate well with the data given by KSO. The method may be able to implement a more complicated statistical analysis of H\(\upalpha\) solar flares. 相似文献
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