Results 11 to 20 of about 449,623 (127)
, 2015 本发明公开一种测量滑坡表面倾斜及滑坡主滑方向的方法和装置，其中，所述装置包括：倾角传感器，角度传感器和适配加工件，所述适配加工件包括圆筒；所述角度传感器为圆柱形，其主轴上安装有偏心铅摆，所述角度传感器安装在所述圆筒内的上部，用于测量滑坡主滑方向的角度变化；所述倾角传感器为圆柱形，安装在所述圆筒内的底部，用于测量滑坡表面倾斜的角度变化。本发明通过角度传感器测量滑坡主滑方向，通过滑坡表面倾斜的角度变化，能够对一些类型的滑坡（如牵引式滑坡、岩质滑坡），进行有效监控。另外，本发明的装置造价相对低廉 ...
吕祥锋 +6 more
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, 2004 坡面流是坡面土壤侵蚀的根本动力，是研究土壤侵蚀动力学过程的基础。简要介绍了坡面流的基本特征和水力学特性，综述了坡面入渗产流过程、坡面流阻力，以及坡面流运动的数学描述和预报模型等方面的研究进展。指出复杂坡面条件下的坡面流运动 ...
陈力, 李家春, 向华, 刘青泉
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Legislative Attention and Nonprofit Efficiency: A Link Across Sectoral Boundaries
Policy Studies Journal, Volume 54, Issue 1, February 2026.ABSTRACT Government attention matters for nonprofit management and nonprofit‐government interactions. This study focuses on legislative attention, an important yet less‐studied aspect of government attention in public policy research, and examines its impact on nonprofit efficiency.
Yuhao Ba, Jessica Berrett, Jason Coupet
wiley +1 more source
Shuitu Baochi Xuebao, 1995 从理论上分析了降雨倾角、风向等对不同坡向坡面承雨强度的影响，纠正了目前研究中的不合理观点，并在此基础上，探讨了均匀理想坡面土壤侵蚀的临界坡度。
李全胜 王兆骞
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Shuitu Baochi Xuebao, 2023 为了明确等高犁耕条件下黄土坡耕地地形与坡度的变化特征,基于6个坡度(3°,5°,10°,15°,20°,25°)和5个耕作强度(6,12,18,24,30次)的组合,开展模拟耕作试验,利用测针法获取耕作后地表高程数据,探讨耕作强度和坡度对黄土直线形坡演化特征的影响。结果表明,在等高向下犁耕条件下,不同坡度的直线坡随着耕作强度的增加逐渐向"∽"形复合坡演化。同一坡度下,随着耕作强度的增加,坡脚延伸,整体小区投影坡长增大,坡脚高程增加幅度大,堆积现象明显,坡度大幅度减小;坡中高程增加,逐渐抬起坡度减小 ...
张泽瑜 +4 more
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Wildlife Letters, Volume 3, Issue 2, Page 73-83, June 2025.Blue sheep in Dhorpatan Hunting Reserve prefer alpine grasslands at 3800–4200 m on south‐facing slopes near water resources, favoring areas with low tree cover and dense ground cover, particularly rhododendrons, junipers, and Cyperaceae grasses. Their habitat significantly overlaps with livestock.
Amit Adhikari +4 more
wiley +1 more source
Understanding consumers to inform market interventions for Singapore's shark fin trade
People and Nature, Volume 6, Issue 2, Page 733-748, April 2024.Abstract Sharks, rays and their cartilaginous relatives (Class Chondrichthyes, herein ‘sharks’) are among the world's most threatened species groups, primarily due to overfishing, which in turn is driven by complex market forces including demand for fins.
Christina Choy +2 more
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Integrative Conservation, Volume 3, Issue 1, Page 76-86, March 2024.Jigme Dorji National Park is the exclusive refuge for the critically endangered Bhutan poppy in Bhutan and worldwide, confined to alpine screes in Tshophu, Tshophu base and Jichudrakey base in Soe gewog, Thimphu. The primary conservation threats to this species stem from harvesting, grazing and trampling by livestock, despite the majority of Bhutan ...
Pema Dendup +3 more
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Shuitu Baochi Xuebao, 2004 定量分析评价水蚀风蚀交错带土壤侵蚀的坡向差异对于土壤侵蚀防治具有重要意义。通过对黄土高原水蚀风蚀交错带六道沟流域一个典型峁坡不同坡向及坡位土壤剖面中137Cs含量的分析研究,表明研究区内梁峁地形的坡向侵蚀差异明显,各坡向平均侵蚀速率大小依次是北坡>东坡>南坡>西坡,南北坡侵蚀差异与黄土丘陵区其它区域相反,分析认为,这与该区域水蚀、风蚀叠加的特殊侵蚀外营力有关,并根据南北坡侵蚀速率的差值估算出该区域风蚀所占比例至少大于18%;峁坡各坡向不同坡位侵蚀差异明显,坡面下部侵蚀最严重,坡面上部和中部次之 ...
李勉 李占斌 刘普灵 崔灵周 李雅琦
doaj
Shuitu Baochi Xuebao, 2023 为揭示土壤颗粒组成在垂直和水平方向上的分布规律,采集砒砂岩区典型坡面0—100 cm剖面的土壤,运用经典统计学测定其颗粒组成。结果表明:坡面0—100 cm土壤质地主要为砂壤土(59.21%)和壤砂土(36.40%)。随土层深度增加,砂粒含量增加,粉粒和黏粒含量减少,土壤逐渐呈现粗粒化的趋势;坡面尺度上,表层0—10 cm砂粒为弱变异,其余各层各粒级均为中等程度变异,且随土层深度增加变异性增强,不同粒级的变异系数表现为砂粒＜粉粒＜黏粒。沿坡面等高线方向,样带B粗粒化程度最弱,10 cm土层以下 ...
胡健 +5 more
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