Results 1 to 10 of about 1,537 (187)
Optical spectrum of the post-AGB Star HD56126 in the wavelength interval 4010-8790 Å Å [PDF]
Astrophysical Bulletin, 2007 The optical spectrum of the post-AGB star HD56126 identified with the infrared source IRAS07134+1005 is studied in detail using high spectral resolution observations (R = 25000 and 60000) performed with the echelle spectrographs of the 6-m telescope. A total of about one and a half thousand absorptions of neutral atoms and ions, absorption bands of C2,
V. G. Klochkova +3 more
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Measurement of the A-Value of the Intersystem Transition in Al II at 2670 Å: Å Progress Report [PDF]
International Astronomical Union Colloquium, 1984 Ratios of intensities of spectral lines produced in the radiative decay of collisionally-excited levels of atomic ions are versatile indicators of electron density in astrophysical plasmas when one of the lines involves a metastable level (see the review by Feldman 1981 and references therein). Radiative transition probabilities (A-values) and electron
B. Carol Johnson, H.S. Kwong
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Evaluation of Collapse Susceptibility Based on a Contribution Rate Model [PDF]
, 2022 [Objective] The spatial database of geological disaster field survey was conducted to analyze the formation mechanism and failure mode of collapse in the area where granite weathered residual soil was developed, to explore the contribution rate of ...
Cai Junjian +4 more
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Dizhen xuebao, 2023 通过详细的野外调查，并结合遥感解译、室内试验以及数值模拟等手段，对矮子沟巨型古滑坡的基本特征、形成机制及运动演化过程进行了深入研究。矮子沟古滑坡的形成条件为：滑坡剪出口与坡脚之间存在巨大的高差，为滑坡的形成创造了良好的临空条件；顺向岸坡结构以及坡体内发育的多组控制性结构面是滑坡发生的结构基础；玄武岩系中的凝灰岩软弱夹层削弱了岩体的完整性，地表水及地下水长期入渗，水的软化作用降低了软弱夹层的抗剪强度；地震作用是造成岩体最终滑动失稳的关键因素。该滑坡的动力学过程可划分为四个阶段：① 启程活动阶段 ...
Tong Shen +7 more
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Causes and stability analysis of the landslide at Tianbao Reservoir in Jingning County, Gansu Province [PDF]
, 2023 On September 18, 2020, a landslide occurred on the left bank of Tianbao Reservoir in Tianbao Village, Sihe Town, Jingning County, Pingliang City, Gansu Province.
Guoying LI +4 more
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Analysis of high-position landslide characteristics based on multi-source remote sensing data：A case study of the Yanwo Village landslide in Rongshan Town, Lizhou District, Guangyuan City [PDF]
, 2023 On October 6, 2021, a high-position landslide disaster occurred in Yanwo Village，Rongshan Town, Lizhou District, Guangyuan City,Sichuan Province, around 13: 00.
Dewei HE +3 more
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水电科技, 2022 水库安排稳定性处理在水库运行维护中有着重要的作用，文章以阿拉沟水库工程地质条件、环境影响为研究为出发点，从边坡自身稳定性，结合实际工作中变形体现状分析，并在实践中采取积极有效的处理措施来进行论证分析。
玉 滕, 明章 彭
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水电科技, 2022 边坡稳定性分析是岩土工程中的重要研究内容，边坡稳定性分析的观点的变化是随着人类理论方面的突破和实践经验的积累不断变化的。文中以三峡库区某库岸公路边坡为研究对象，通过现场实际勘测和室内资料的分析，结合边坡变形破坏特征，确定其变形破坏模式。通过运用Geo-Studio软件建立稳定分析计算模型，运用极限平衡法，找出危险滑面，计算其安全系数，计算工况包括天然、暴雨、地震、库水位升降工况下的边坡稳定性。结果表明：该段边坡结构欠稳，易发生变形破坏。结合实际，进一步提出了一些边坡维护建议。
素云 乔 +4 more
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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
地矿测绘, 2019 作为一种地质灾害,滑坡对社会发展以及周边居民的日常生活造成困扰、并威胁居民的生命财产安全,因此,应重视滑坡地质灾害的勘查和防治工作。本文论述了滑坡形成的主要原因和判断特征,最后根据滑坡的防治原则对目前滑坡的主要防治技术进行了分析。
云智 陆
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