Results 121 to 130 of about 52,494 (295)
Energy Science &Engineering, EarlyView.With the advancement of coal mining technology driving the development of working faces toward increased mining heights and extended lengths, the enlargement of face dimensions has led to expanded overlying strata failure zones and intensified ground pressure manifestations. Consequently, traditional methods for determining hydraulic support resistance
Chen Gong +5 more
wiley +1 more source
Energy Science &Engineering, EarlyView.This study reveals the temporal and spatial evolution law of roof separation under the karst aquifer and the dynamic water inrush mechanism of roof separation. The FAHP–EWM–CRITIC combination weighting method was established to obtain the risk zoning of bed separation water inrush in a karst landform mining area. ABSTRACT Coalfields in northern Guizhou
Xilong Zhu +5 more
wiley +1 more source
Hypersurfaces and the Weil conjectures
, 2009 We give a proof that the Riemann hypothesis for hypersurfaces over finite fields implies the result for all smooth proper varieties, by a deformation argument which does not use the theory of Lefschetz pencils or the l-adic Fourier transform.Comment: 12 ...
Scholl, A. J.
core +2 more sources
Energy Science &Engineering, EarlyView.In this study, the key control mechanism of surrounding rock stability is revealed by theoretical analysis and UDEC‐Trigon numerical simulation method, aiming at the problem that oil shale roof is prone to separation and slip deformation under complex stress.
Jiang Xiao +5 more
wiley +1 more source
Energy Science &Engineering, EarlyView.A novel collaborative control technology of gob‐side entry retention with narrow roadside filling wall is proposed, wherein anchoring end of anchor cable must penetrate the boundary line of stress peak (plastic zone). ABSTRACT Gob‐side entry retention represents a major technological innovation in the history of coal mining, offering numerous ...
Wenxu Liang, Wei Fu, Ziwen Liu
wiley +1 more source
Energy Science &Engineering, EarlyView.Based on theoretical analysis, the energy‐evolution behavior of the surrounding rock at various depths on the solid‐coal side of the 221303 material roadway during the “advancing‐toward‐mining” process was first clarified. Numerical simulations were then performed to validate and elaborate on the theoretical results.
Wei Zhang +7 more
wiley +1 more source
تأثیر سه نوع سمان موقت بر میزان گیر روکشهای سمانشونده روی اباتمنتهای یک قطعهای با دو طول مختلف [PDF]
Journal of Mashhad Dental School, 2012 مقدمه: استفاده از سمانهای موقت برای سمان کردن پروتزهای متکی بر ایمپلنت، مزیت سهولت قابلیت بازیابی را داراست. بعضی از این سمانها دارای گیر بیشتر و بعضی دارای گیر ضعیفتری میباشند.
غلامرضا طباخیان +1 more
doaj
Induced abortion in the world: 3. In search of a minimum common ground
International Journal of Gynecology &Obstetrics, EarlyView.Abstract The rising worldwide trend toward legalization of termination of pregnancy has been accompanied by increased polarization around abortion. Two opposite broad coalitions emerged from this confrontation, generally known as the “pro‐life” and “pro‐choice” movements. The basic issue for pro‐life advocates is that the protection of “innocent, human
Giuseppe Benagiano +4 more
wiley +1 more source
Laparoscopic Resection of Caudate Lobe Liver Tumors in Clinical Practice
iNew Medicine, EarlyView.ABSTRACT The caudate lobe (Couinaud segment I), owing to its deep location in the posterosuperior liver, intimate encirclement by the inferior vena cava (IVC), and close adjacency to the hepatic hilum and major hepatic veins, presents a formidable anatomical challenge for resection.
Dingde Ye +4 more
wiley +1 more source
A star in the daylight clinical vignette: Lesional focal epilepsy with cerebral accessory falx
Epileptic Disorders, EarlyView.
Kyle McGrath +3 more
wiley +1 more source