Results 11 to 20 of about 401,010 (297)

An analytical mechanics approach to the first law of thermodynamics and construction of a variational hierarchy [PDF]

open access: yesTheoretical and Applied Mechanics, 2021
A simple procedure is presented for the study of the conservation of energy equation with dissipation in continuum mechanics in 1D. This procedure is used to transform this nonlinear evolution-diffusion equation into a hyperbolic PDE; specifically, a ...
Said Hamid
doaj   +1 more source

Calibration of an elastoplastic model of sand liquefaction using the swarm intelligence with a multi-objective function

open access: yesJournal of Rock Mechanics and Geotechnical Engineering, 2023
According to post-seismic observations, spectacular examples of engineering failures can be ascribed to the occurrence of sand liquefaction, where a sandy soil stratum could undergo a transient loss of shear strength and even behave as a “liquid ...
Qiutong Li, Zhehao Zhu
doaj   +1 more source

Failure analysis and fatigue life prediction of high-speed rail clips based on DIC technique

open access: yesAdvances in Mechanical Engineering, 2021
With the development of rail transportation, the fatigue failure of rail clips has become an issue, which affects the operational safety of trains. In this study, reasons for the fatigue failure of rail clips were investigated to improve their service ...
Yan Liu   +3 more
doaj   +1 more source

A 2D Model for 3D Periodic Deep-Water Waves

open access: yesJournal of Marine Science and Engineering, 2022
The paper is devoted to further development of an accelerated method for simulation of the two-dimensional surface waves at infinite depth with the use of a two-dimensional model derived with simplifications of the three-dimensional equations for ...
Dmitry Chalikov
doaj   +1 more source

Many-particle Sudarshan-Lindblad equation: mean-field approximation, nonlinearity and dissipation in a spin system [PDF]

open access: yesRevista Brasileira de Ensino de Física, 2014
A system of N spin-1/2 particles interacting with a thermal reservoir is used as a pedagogical example for advanced undergraduate and graduate students.
G.A. Prataviera, S.S. Mizrahi
doaj   +2 more sources

An Overview of Self-Heating Phenomena and Theory Related to Damping and Fatigue of Metals

open access: yesApplied Sciences, 2022
This paper presents an overview of the self-heating phenomena and the continuum thermodynamics framework related to the damping and fatigue of metals. The self-heating process under cyclic loading generally undergoes three phases: Phase I with gradually ...
Xijia Wu, Lucy Li
doaj   +1 more source

Dissipation, Residue Behavior and Dietary Risk Assessment of Difenoconazole on Jujube (Ziziphus jujuba Mill.)

open access: yesAgronomy, 2022
Difenoconazole is a triazole germicide that is usually applied to prevent fungal diseases on crops with high efficiency and safety. Jujube is a spiny Rhamnaceous plant that originated in China more than 4000 years ago and is extensively cultivated in ...
Long Su   +6 more
doaj   +1 more source

Application of Experimental Measurements in a Wind Tunnel to the Development of a Model for Aerodynamic Drag on Elite Slalom and Giant Slalom Alpine Skiers

open access: yesApplied Sciences, 2022
Aerodynamic drag is a major cause of energy losses during alpine ski racing. Here we developed two models for monitoring the aerodynamic drag on elite alpine skiers in the technical disciplines.
Matej Majerič   +4 more
doaj   +1 more source

A New Criterion Beyond Divergence for Determining the Dissipation of a System: Dissipative Power

open access: yesFrontiers in Physics, 2021
Divergence is usually used to determine the dissipation of a dynamical system, but some researchers have noticed that it can lead to elusive contradictions. In this article, a criterion, dissipative power, beyond divergence for judging the dissipation of
Xiaoliang Gan   +6 more
doaj   +1 more source

Development of a Modified QuEChERS Method Coupled with LC-MS/MS for Determination of Spinetoram Residue in Soybean (Glycine max) and Cotton (Gossypium hirsutum)

open access: yesJournal of Xenobiotics, 2022
An analytical method for the quantitative determination of the insecticide spinetoram in cotton and soybean was established and validated using liquid chromatography tandem mass spectrometry (LC-MS/MS).
Arnab Goon   +2 more
doaj   +1 more source

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