Results 121 to 130 of about 34,263 (308)
Meitan kexue jishuTo address the technical challenge of manually adjusting dust control parameters in long-term the fully mechanized excavation working face, which leads to an inability to sustain optimal dust suppression effects, this paper adopts a research approach ...
Lei SHI +3 more
doaj +1 more source
New approach to the design of mining operations [PDF]
, 2019 Analysis of the production development scenarios is proposed for strategic activity planning; criteria to make decisions under the uncertainty conditions as well as decision-making trees for day-to-day management are proposed to determine balanced ...
Hrinov, V., Khorolskyi, A., Mamaikin, O.
core +1 more source
Contract Labour, Job Quality and Turnover Intention—Evidence From Nigeria
Journal of Agricultural Economics, EarlyView.ABSTRACT Labour contracting, where intermediaries provide farmers with migrant workers, plays a central role in meeting the demand for seasonal labour on labour‐intensive farms. Yet this system poses underresearched challenges for both workers and farmers.
Olayinka Aremu +3 more
wiley +1 more source
Migration law of respirable dust on a super-long fully mechanized double-shearer working face
International Journal of Mining Science and Technology, 2016 Abstract In order to understand the migration law of respirable dust and gain reasonable design parameters for dust control on a super-long double-shearer fully mechanized working face, this paper describes research carried out using a numerical simulation package (Fluent) based on gas-solid coupling dispersed multiphase flow model and field ...
Min Jia +5 more
openaire +1 more source
Technology for Whom and for What? A Global South View of Tech Diplomacy
Global Policy, EarlyView.ABSTRACT International politics is linked to its technical‐social character. Also, technology is socially constructed and thereby not entirely neutral or impartial. A tech‐driven geopolitical landscape has been a defining feature of contemporary world politics.
Eugenio V. Garcia
wiley +1 more source
Meikuang AnquanThe fully mechanized mining face system is complex and large, and the equipment is highly correlated. The reliability of the intelligent fully-mechanized coal mining equipment system has gradually become the key factor restricting the intelligent safe ...
Xu LI +4 more
doaj +1 more source
UWB based measurement system for pushing progress of fully mechanized working face
Gong-kuang zidonghuaA real-time measurement system for the pushing progress of fully mechanized working face based on UWB ranging technology is proposed to address the problems of existing measurement and calculation methods, such as time-consuming, labor-intensive, large cumulative errors, and inability to recalculate after sensor damage.
LIU Qing, LIU Junfeng
openaire +1 more source
Small Pillar Driving Technique in Fully Mechanized Working Face of Outburst Coal Seam
Meikuang Anquan, 2020 Aiming at the safety problems caused by poor roadway stability and other factors during gob-side entry driving of 15106 isolated island face in Sijiazhuang Mine, theoretical calculations, numerical simulations and field tests were adopted to determine the coal pillar size and field practice effect of gob-side entry driving in isolated face. The results
openaire +1 more source
Close Fire Support: Sexton Self-Propelled Guns of the 23rd Field Regiment, 1942–1945 [PDF]
, 2012 On the battlefields of the First World War, initially successful attacks all too often ended in failure because artillery weapons could not be moved up quickly enough to support assault infantry at the sharp end of the fight.
Iarocci, Andrew
core +1 more source
A formally verified proof of the prime number theorem
, 2005 The prime number theorem, established by Hadamard and de la Vall'ee Poussin independently in 1896, asserts that the density of primes in the positive integers is asymptotic to 1 / ln x.
Avigad, Jeremy +3 more
core +7 more sources