Results 71 to 80 of about 60,617 (172)
, 2014 The factors related to shallow slope failures include soil depth, vertical soil structure, and bedrock topography. In this study, we surveyed spatial variations of soil depth and vertical soil structure by conducting simplified penetration tests, and ...
Meng-Chun Chan +3 more
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Policy &Internet, Volume 18, Issue 1, March 2026.ABSTRACT This article investigates how TikTok Shop reproduces the e‐commerce model of Douyin Shop against a backdrop of divergent regulatory challenges and geopolitical distrust. One of the strategic changes we observe in TikTok Shop is the shift of consumer goods suppliers from local merchants to China‐based sellers.
Shuaishuai Wang, Jing Meng, Yitong Li
wiley +1 more source
Shuitu Baochi Xuebao, 2004 运用分形理论对四川省汶川县土地利用/土地覆被镶嵌体景观类型的分维值进行计算,并讨论了各种景观类型的分维性质。结果表明:土地利用/土地覆被镶嵌体具有统计意义上的自相似性,是一种随机分形结构;景观类型的分维值越大,其形态越复杂,反之越简单。SI(稳定性指数)>0,表示景观在其形态复杂状态下的一种稳定性,SI越大,该景观形态越稳定;反之亦然。SI<0,表示景观在其形态简单状态下的一种稳定性,SI越小,该景观形态越稳定;反之亦然。景观类型的分维值随时间变化而增大,该景观的形态变得复杂,反之 ...
邵怀勇 仙巍 马泽忠 李爱农 周万村
doaj +2 more sources
Dianci bileiqi, 2016 利用时域有限分析法,计算了在正弦平面波入射的条件下,圆柱形接地导体与有棱边角形状导体的电磁散射的散射场,分析了探地雷达图像是否可以区别圆柱形导体和因腐蚀形成的不规则导体。结果表明不同形状的接地体,其电磁散射场的幅值和相位均有明显不同特征,探地雷达图像可有效反映圆钢接地体腐蚀点处形状的变化。
梁皓澜 +4 more
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Gaoya dianqi, 2020 山区地形不同位置的地闪密度差异较大。为了研究山区地形对地闪密度的影响,文中首先基于雷电定位系统数据利用Google Earth和ArcGIS软件分析了山体不同部位的地闪密度差异,然后分析了某条500 kV输电线路的雷电绕击跳闸率计算结果。研究发现:改进网格法筛选范围小于400 m时地闪密度明显大于实际情况,大于1 600 m时山顶、山坡、平地的地闪密度趋于一致,抵消了地形的差异性;山区地形的地闪密度随着山体海拔高度的变化而变化,整体呈现出山顶地闪密度>山坡>山谷的规律 ...
胡豪, 陶鑫
doaj
Genetic origins and climate‐induced erosion in economically important Asian walnuts
Conservation Biology, Volume 40, Issue 1, February 2026.Abstract The global climate is undergoing unprecedented changes, posing significant threats to species persistence. However, the spatiotemporal impacts on genetic diversity remain poorly understood, hindering species conservation and management. Walnuts, generally referred to as Juglans regia and J. sigillata, are economically vital in Asia, but little
Peng‐Zhen Fan +17 more
wiley +1 more source
, 2014 梅姬颱風 (2010) 與東北季風之共伴效應於台灣宜蘭縣蘇澳地區帶來了豐沛降雨，高累積雨量造成了台9 線蘇花公路群集性土砂災害，尤其在115.9K 上邊坡更誘發了約210 萬m3 之大規模崩塌土砂災害。本文從現地地質調查、致災機制、水文分析及遙測影像判釋等面向進行討論。由降雨-延時-頻率分析得知近年來誘發重大崩塌事件的雨量皆高於200 年回歸週期，並獲致良好判別致災雨場之I-R 圖降雨臨界線關係(Re+53.5Iave=1,146)。多時期遙測影像判釋指出東澳嶺坡頂之弧型張力裂隙仍有持續溯源發展之趨勢 ...
Ching-Fang Lee +13 more
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Mitigating light pollution impacts on arthropods based on light‐emitting diode properties
Conservation Biology, Volume 40, Issue 1, February 2026.Abstract Light pollution from artificial light at night (ALAN) is a significant environmental problem with far‐reaching consequences for ecological systems. Recent innovations in light‐emitting diode (LED) technology may offer sustainable outdoor lighting solutions, but scientific evidence is lacking. We investigated the effects of various LED lighting
Nicola van Koppenhagen +3 more
wiley +1 more source
Shuitu Baochi Xuebao, 2022 为探究坡形对浅沟发育的影响，以陕西省靖边县狼儿子沟无人机航摄影像为基础数据，通过目视解译得到浅沟（指瓦背状地形底部）225条，统计了浅沟条数、浅沟长度、沟头到分水岭的距离及浅沟密度等指标。利用浅沟地形分水线上的高程点进行插值得到原始坡面数字高程模型（digital elevation model，DEM），以此DEM提取地形曲率以表征坡形，进而分析坡形与浅沟指标的关系。结果表明：（1）以浅沟地形分水线上的高程点插值后的DEM对浅沟进行了综合，能较好地表达浅沟发育之前原始坡面的地形特征。（2 ...
王海于 +4 more
doaj
Geomorphic development fo intermontane basins in Korea [PDF]
, 1987 Thesis--University of Tsukuba, D.Sc.(B), no. 373, 1987.
Chang Ho, Chin Ho, 張 昊
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