Results 31 to 40 of about 20,641 (257)
British Educational Research Journal, EarlyView.Abstract The latest reform of initial teacher education (ITE) in France, introduced in 2021, aims to make teacher training less theoretical and therefore more ‘practical’. New elements, such as the replacement of the Écoles Supérieures pour le Professorat et l'Éducation (ÉSPÉs) by the Instituts Nationaux Supérieurs du Professorat et de l'Education ...
Eric Maleyrot, Thérèse Perez‐Roux
wiley +1 more source
Impacts of Backlash on Nonlinear Dynamic Characteristic of Encased Differential Planetary Gear Train
Shock and Vibration, 2019 A multifreedom tensional nonlinear dynamic equation of encased differential planetary gear train with multibacklash and time-varying mesh stiffness was developed in the present research.
Zengbao Zhu +3 more
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Anti-backlash gear bearings [PDF]
, 2009 A gear bearing having a first gear and a second gear, each having a plurality of teeth. Each gear operates on two non-parallel surfaces of the opposing gear teeth to perform both gear and bearing functions simultaneously.
Vranish, John M.
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Business Strategy and the Environment, EarlyView.ABSTRACT This study analyses the association between carbon emissions and financial performance in Latin American firms. The scientific literature on this topic is limited, with little evidence available in this geographical region. This study aims to address this research gap by testing hypotheses focused on analysing how Scope 1, 2 and 3 carbon ...
Ana Isabel Mendieta‐Callirgos +3 more
wiley +1 more source
Seismic analysis and design of tunnels within fault ground: A review
Deep Underground Science and Engineering, EarlyView.The research methods of seismic response of tunnels within fault ground, including field investigations, analytical solutions, physical experiments, and numerical simulations, and seismic countermeasures are discussed. The present study examines the shortcomings and limitations of the current research and design, and puts forward proposals for future ...
Xingda Wang +6 more
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Improvement of flight simulator feeling using adaptive fuzzy backlash compensation [PDF]
, 2007 In this paper we addressed the problem of improving the control of DC motors used for the specific application of a 3 degrees of freedom moving base flight simulator.
Amara, Zied, Bordeneuve-Guibé, Joël
core
Dynamic Analysis of a Fault Planetary Gear System under Nonlinear Parameter Excitation
Shock and Vibration, 2021 In order to facilitate lubrication and avoid the gear stuck due to thermal expansion, there needs to be a gap between the tooth profiles. As a strong nonlinear factor, the backlash will affect the motion state of the planetary gear system.
Jianchao Han +4 more
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Hydraulic system provides smooth control of large tracking and antenna drive systems at very low tracking rates [PDF]
, 1967 Hydraulic system provides smooth control of large tracking and antenna drive systems at very low tracking rates. This configuration modifies a series connection of the drive motors with compensating orifices to offset the effects of drain line loss ...
Parker, G. L.
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Eye &ENT Research, EarlyView.ABSTRACT Myopia is a rapidly growing global health challenge, affecting 1.9 billion people and projected to reach 4.9 billion by 2050, with high myopia and its sight‐threatening complications such as maculopathy, retinal detachment, and glaucoma increasing disproportionately.
Victor Opoku‐Yamoah +2 more
wiley +1 more source
Jixie chuandong, 2011 In order to simulate the effects of backlash on response frequency of gear mechanism in engineering application,the multi-rigid-model of one-stage gear mechanism including backlash is established.The parameters of geartooth contact-impact force model are
肖回鹏, 罗欣, 徐振高
doaj