Results 21 to 30 of about 427,467 (257)
`Operational' energy conditions [PDF]
Classical and Quantum Gravity, 1998 I show that a quantized Klein-Gordon field in Minkowski space obeys an `operational' weak energy condition: the energy of an isolated device constructed to measure or trap the energy in a region, plus the energy it measures or traps, cannot be negative.
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The Transient and Thermal Effects on EHL Performance of a Helical Gear Pair
Tribology Online, 2018 A non-Newtonian numerical solution system for the transient thermo-elastohydrodynamic lubrication (TEHL) model has been proposed for a helical gear pair with the finite line contact theory. This model is used to comprehensively show the transient effect,
Mingyong Liu, Yadong Liu, Chenhui Wu
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Applied Sciences, 2021 This study used a discrete-element analysis to predict the excavation performance of a 7.73 m-diameter earth pressure balance (EPB) shield tunnel boring machine (TBM).
Byungkwan Park +4 more
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Necessary condition of diamond like carbon coated mechanical seals for nitrogen gas
Nihon Kikai Gakkai ronbunshu, 2017 Necessary conditions for usage of DLC coated mechanical seals were investigated by using ring on ring type sliding tests under various contact pressures and sliding speeds in dry and wet nitrogen.
Masao OKA, Norio UEMURA, Koshi ADACHI
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Operating conditions combination analysis method of optimal water management state for PEM fuel cell
Green Energy and Intelligent Transportation, 2023 : The water content of proton exchange membrane fuel cells (PEMFCs) affects the transport of reactants and the conductivity of the membrane. Effective water management measures can improve the performance and extend the lifespan of the fuel cell.
Wenxin Wan +7 more
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Numerical Study of Effect of Trim on Performance of 12500DWT Cargo Ship Using Ranse Method
Polish Maritime Research, 2022 This paper deals with the results of studying the effect of trim on the performance of series cargo ship 12500DWT in full scale at two operating conditions by using the RANSE method.
Chuan Tran Quoc +5 more
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Operant conditioning in invertebrates [PDF]
Current Opinion in Neurobiology, 2003 Learning to anticipate future events on the basis of past experience with the consequences of one’s own behavior (operant conditioning) is a simple form of learning that humans share with most other animals, including invertebrates. Three model organisms have recently made significant contributions towards a mechanistic model of operant conditioning ...
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Optimizing Operating Condition of the Filters in Micro-irrigation Pump
Guan'gai paishui xuebao, 2022 【Objective】 A porous filter is often used in micro-irrigation systems to filter debris and sand particles. Its performance depends on many factors. The purpose of this paper is to present a method to optimize its operating conditions.
TAO Hongfei +4 more
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Simulation of Selected Induction Motor Operating Conditions Using COMSOL Software
Advances in Electrical and Electronic Engineering, 2018 In this paper, some results from a simulation of three-phase squirrel-cage induction motor using COMSOL Multiphysics software are shown for the selected motor operating conditions. The simulation has been carried out under the nominal operating condition
Stanislav Kocman +2 more
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Finanse i Prawo Finansowe, 2023 The purpose of the article. The study aims to analyze how these special rules of financing during the pandemic affected the financial situation of hospitals in Poland. Methodology. We analyzed a sample of 86 Polish hospitals from 2019 to 2021.
Agnieszka Bem +4 more
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