Results 121 to 130 of about 116,075 (283)

Geologists of Russian origin in Latin America [PDF]

, 2018
Se describe la vida y trayectoria de geólogos que más allá de su nacionalidad (rusa, ucraniana, tártara, alemana, etc.), nacieron en territorios que pertenecieron al Imperio Ruso, la Unión Soviética o la Federación Rusa, y de sus descendientes graduados ...
Alonso, Ricardo, Boltovskoy, Demetrio, Charrier González, Reynaldo, Durand Delga, Michel, Minina, Elena, Riccardi, Alberto Carlos, Tchoumatchenco, Platon, Wiasemsky, Michel   +7 more
core   +1 more source

Rockburst prediction based on data preprocessing and hyperband‐RNN‐DNN

Deep Underground Science and Engineering, EarlyView.
A data preprocessing workflow is proposed to address challenges in rockburst data analysis. Coupled algorithms preprocess the data set, and hyperband optimization is used to enhance RNN performance. Results show that preprocessing improves accuracy, while dense layers enhance model stability and prediction performance.
Yong Fan, Chenxi Yin, Guangdong Yang, Shengyong Ding, Bin Tian   +4 more
wiley   +1 more source

Creep properties and constitutive model of diabase in deep water conveyance tunnels

Deep Underground Science and Engineering, EarlyView.
The axial and lateral creep characteristics of diabase were analyzed based on compression creep tests. The nonlinear viscoelastic‐plastic model capable of describing the whole creep process was established based on the fractional derivative and damage theories.
Zhigang Tao, Pengxiao Guan, Xiaojie Yang, Keyuan Liu, Mingjiu Cai, Hong Yang   +5 more
wiley   +1 more source

Studies of a rigid breakwater of finite depth. [PDF]

, 1968
Thesis (B.S.)--Massachusetts Institute of Technology, Dept. of Geology and Geophysics, 1968, and Thesis (B.S.)--Massachusetts Institute of Technology, Dept.
Gottschalk, Stanley Anton
core  

Failure characteristics and the energy criterion of rock with a through‐going joint under true‐triaxial unloading conditions: Insights from the DEM model

Deep Underground Science and Engineering, EarlyView.
The rock failure mode is significantly influenced by the contributing factors, such as the joint inclination, the initial confining pressure, and the unloading point. We found six typical rock failure modes after a large number of numerical tests. Abstract Excavation unloading damages rock masses, with preferential failure along geological defects in ...
Fei Liu, Changhui Liang, Sijia Liu, Yongjun Zhang, Luo Wang   +4 more
wiley   +1 more source

Geological and geotechnical challenges on the Great Dyke of Zimbabwe and their impact on hardrock pillar design

Deep Underground Science and Engineering, EarlyView.
The Great Dyke of Zimbabwe is notable for its rich platinum group metal deposits but poses significant geological and geotechnical challenges due to its complex rock types and structural features. Traditional pillar design methods are insufficient for addressing these complexities; the study suggests incorporating advanced techniques such as machine ...
Tawanda Zvarivadza, Hendrik Grobler, Moshood Onifade, Manoj Khandelwal   +3 more
wiley   +1 more source

Soliton solutions of the (2 + 1)-dimensional Jaulent-Miodek evolution equation via effective analytical techniques

Scientific Reports
In this study, we investigate the $$(2+1)$$ -D Jaulent-Miodek (JM) equation, which is significant due to its energy-based Schrödinger potential and applications in fields such as optics, soliton theory, signal processing, geophysics, fluid dynamics, and ...
Muhammad Zubair Raza, Muhammad Abdaal Bin Iqbal, Aziz Khan, D. K. Almutairi, Thabet Abdeljawad   +4 more
doaj   +1 more source

Nonsilting transport characteristics of coal slurry in a deep underground fluidization conveying pipeline under the action of a guide vane swirler

Deep Underground Science and Engineering, EarlyView.
Aiming at the scientific frontiers of in situ fluidized mining of deep resources, a deep coal fluidized pipeline lifting system based on hydraulic conveying has been proposed. To solve the issue of particle sedimentation of large particles in horizontal connection sections, a solution involving the installation of guide vane‐type swirlers in the ...
Jiusheng Bao, Shaodi Zhao, Yan Yin, Zhongbin Wang, Shuai Liu, Shirong Ge   +5 more
wiley   +1 more source

Imaging Techniques of Geophysical Properties for Engineering by Geophysical Exploration.

Journal of the Japan Society of Engineering Geology, 2002
物理探査法は情報処理技術の向上とともに測定・解析技術の高精度化が図られているが, 調査地点の水理地質構造や力学強度特性の評価に対しては, 餌析断面の解釈に客観性がなく, 概略的な地質構造を把握するための補助的な手段との評価にとどまっている. 本論では, 複数の物理検層データを組み合わせて透水係数を求める手法を適用し, 室内試験やほかの手法によるデータと比較してその有効性を検討した. DE LIMA (1995) による泥質砂岩を対象とした電気比抵抗モデルを基に複数の物理検層データ (電気・自然γ線・中性子検層) から透水係数を推定する手法を提案した. この手法を新第三紀堆積性軟岩地点の検層データに適用した結果, 得られた透水係数はコア試料のそれと調和的な値が得られた. 次に, KATSUBE and
openaire   +2 more sources

Numerical investigation on the influence of mesoscopic deformation on contact area and hydraulic aperture to fracture seepage

Deep Underground Science and Engineering, EarlyView.
Fluid flow through a single fracture is commonly described by the cubic law. However, deviations from this model are expected because natural fracture surfaces are rough and in contact with each other in discrete regions. In this study, the interactions between fracture closure, contact area, and hydraulic characterization of mesoscopic‐scale rough ...
Chenghao Han, Yuanlin Bai, Weijie Zhang, Jicheng Zhang, Hongfa Ma, Weiye Li   +5 more
wiley   +1 more source