Results 61 to 70 of about 195,988 (262)

PARAMETERS OF KAMCHATKA SEISMICITY IN 2008

Геодинамика и тектонофизика, 2015
The paper describes seismicity of Kamchatka for the period of 2008 and presents 2D distribution of background seismicity parameters calculated from data published in the Regional Catalogue of Kamchatka Earthquakes.
Vadim A. Saltykov, Nadezhda M. Kravchenko   +1 more
doaj   +1 more source

Probability prediction of true‐triaxial compressive strength of intact rocks based on the improved PSO‐RVM model

Deep Underground Science and Engineering, EarlyView.
In this work, we propose an improved particle swarm optimization (PSO) algorithm and develop an improved PSO‐relevance vector machine (RVM) model as a substitute for traditional true‐triaxial testing. The model's high prediction accuracy was validated through comparisons with two other machine learning methods and five three‐dimensional Hoek–Brown type
Qi Zhang, Maohui Wang, Ning Wang, Yixin Shen, Xuzhen He   +4 more
wiley   +1 more source

EMIC Waves in the Outer Magnetosphere: Observations of an Off-Equator Source Region. [PDF]

, 2019
Electromagnetic ion cyclotron (EMIC) waves at large L shells were observed away from the magnetic equator by the Magnetospheric MultiScale (MMS) mission nearly continuously for over four hours on 28 October 2015.
B. J. Anderson, C. T. Russell, J. L. Burch, King J. H., M. J. Engebretson, P. A. Lindqvist, R. B. Torbert, R. C. Allen, R. E. Ergun, R. J. Strangeway, S. A. Fuselier, S. K. Vines, Zhang J.‐C.   +12 more
core   +1 more source

Study on the failure mechanism of the shield excavation face in the sandy cobble stratum under different buried depths

Deep Underground Science and Engineering, EarlyView.
Abstract One of the significant challenges faced in shield tunnel construction is the risk of collapse resulting from abrupt changes in soil conditions in advance of the working face, particularly within the sandy cobble stratum. This study aims to effectively manage these sudden variations and to further investigate the failure mechanisms associated ...
Hua Jiang, Chongyang Liu, Ao Zhang, Xiaoyan Zhang, Yuhang Li   +4 more
wiley   +1 more source

Dynamic Monitoring and Change Analysis of Lake Area on the Inner-Mongolian Plateau over the Past 22 Years

Remote Sensing
Lakes are essential components of the terrestrial water cycle. Their size and quantity reflect natural climate change and anthropogenic activities in time. Lakes on the Inner-Mongolian Plateau (IMP) have experienced significant changes in recent decades,
Naichen Xing, Fuping Gan, Bokun Yan, Juan Bai, Yi Guo, Yue Zhuo, Ruoyi Li   +6 more
doaj   +1 more source

SPECIFIC VELOCITY STRUCTURE OF THE UPPER MANTLE IN THE TRANSBAIKALIA SEGMENT OF THE MONGOLIA-OKHOTSK OROGENIC BELT

Геодинамика и тектонофизика, 2017
The paper presents the results of deep seismic studies on Geophysical Reference Profile 1-SB (Sredneargunsk – Ust-Karenga – Taksimo – Vitim) in East Transbaikalia,Russia.
V. M. Soloviev, V. V. Chechelnitsky, A. S. Salnikov, V. S. Seleznev, A. V. Liseikin, N. A. Galyova   +5 more
doaj   +1 more source

Airborne geophysical survey of part of Anglesey, North Wales [PDF]

, 1979
An airborne magnetic, electromagnetic and radiometric survey was carried out over part of Anglesey, North Wales. In this report of the survey, an outline of the geology, with brief descriptions of survey techniques, data reduction and presentation are
Smith, I.F.
core  

Effect of confining pressure on fracture characteristics and mineralogical behavior of tight sandstone specimens after hydraulic fracturing

Deep Underground Science and Engineering, EarlyView.
Hydraulic fracturing in tight sandstone and fracture propagation characteristics using backscattered electron‐scanning electron microscope (BSE‐SEM) images. Abstract This study focuses on hydraulic fracturing experiments conducted under triaxial conditions on tight sandstone specimens from Shivpuri district, Madhya Pradesh, India.
Pankaj Rawat, Narendra Kumar Samadhiya
wiley   +1 more source

Introduction to tensorial resistivity probability tomography

, 2005
The probability tomography approach developed for the scalar resistivity method is here extended to the 2D tensorial apparent resistivity acquisition mode.
Mauriello, Paolo, Patella, Domenico
core   +1 more source

Integrated MVG and ERT Survey Over a Shallow Cave [PDF]

, 2009
An integrated geophysical MVG (Microgravity Vertical Gradient) and ERT (Electrical Resistivity Tomography) survey was performed over a shallow cave in the Armetta Mountain karst area, close to the Liguria-Piedmont wa- tershed (Tanaro valley).
Armadillo, E., Caratori Tontini, F., Carmisciano, C., Cocchi, L., Gambetta, M., Stefanelli, P.   +5 more
core   +4 more sources