Results 11 to 20 of about 576,694 (315)

LPT (Local Public Transport) electric buses: innovative solutions to reduce the energy absorption of auxiliaries [PDF]

open access: yesE3S Web of Conferences, 2021
The focus of the study is the analysis and sizing of the air conditioning system on board the vehicle which operates in thermal transient for the duration of the typical mission, using “fan coil” type air conditioning devices powered by a hot or cold ...
Orecchini Fabio   +5 more
doaj   +1 more source

An Evolution Based on Various Energy Strategies [PDF]

open access: yesEntropy, 2021
The simplest model of the evolution of agents with different energy strategies is considered. The model is based on the most general thermodynamic ideas and includes the procedures for selection, inheritance, and variability. The problem of finding a universal strategy (principle) as a selection of possible competing strategies is solved.
Alexander O. Gusev, Leonid M. Martyushev
openaire   +3 more sources

Energy Evolution Characteristics of Rock Under Different Confining Conditions

open access: yesFrontiers in Earth Science, 2022
Constant stiffness confining condition seems more reasonable than constant stress confining condition to simulate the actual confining stress environment of in situ rock which varies with the lateral strain.
Bi-Wen Zhang   +6 more
doaj   +1 more source

Experimental Study on Pressure Relief Mechanism of Variable-Diameter Borehole and Energy Evolution Characteristics of the Surrounding Rock

open access: yesEnergies, 2022
Conventional borehole pressure relief can meet the requirements for preventing rock bursts, but it can also easily destroy the roadway, resulting in system support failure.
Yangyang Li   +6 more
doaj   +1 more source

INFORMATION, ENERGY, AND EVOLUTION [PDF]

open access: yes, 2001
Within the current theory of evolution, the development in the direction of higher complexity is taken to be a necessary condition. This gives birth to a problem why this direction is prevalent for evolution. Philosophers and scientists tried to substantiate this condition and to explain it, yet the question still remains open.
Burgin, Dr. Mark, Simon, Irving
openaire   +2 more sources

Analysis of Impact Mechanism and Energy Evolution Characteristics of Different Coal-Rock Systems

open access: yesMeikuang Anquan, 2020
To further study the impact mechanism and energy evolution characteristics of different coal-rock systems, theoretical calculation and RFPA numerical simulation methods were used to compare and analyze different coal-rock systems from the energy point ...
WEI Hui
doaj   +1 more source

Analysis of Crack-Characteristic Stress and Energy Characteristics of Sandstone under Triaxial Unloading Confining Pressure

open access: yesApplied Sciences, 2023
The deformation and failure of underground engineering are usually caused by unloading. In this work, triaxial unloading confining pressure tests are carried out to simulate the failure process of rock mass caused by unloading, analyze the crack ...
Yanwei Duan, Guohua Zhang, Tao Qin
doaj   +1 more source

Mechanical Properties and Energy Evolution Law of Fractured Coal under Low Confining Pressure

open access: yesApplied Sciences, 2022
To study the mechanical properties and energy evolution characteristics of the shallow fractured coal in the Western China mining area, a series of triaxial compression tests was carried out on fractured coal specimens.
Zhiqi Wang, Xufei Gong, Xuebin Gu
doaj   +1 more source

Numerical Simulation of Rock Dynamic NSCB Test Based on a Self-Developed Dynamic Damage Model

open access: yesFrontiers in Earth Science, 2022
Elucidating and understanding the dynamic fracture characteristics of rocks play an essential role in the application of rock engineering and geophysics.
Xuelong Hu   +14 more
doaj   +1 more source

Seeking evolution of dark energy [PDF]

open access: yesThe European Physical Journal C, 2011
We study how observationally to distinguish between a cosmological constant (CC) and an evolving dark energy with equation of state $\omega(Z)$. We focus on the value of redshift Z* at which the cosmic late time acceleration begins and $\ddot{a}(Z^{*}) = 0$.
Frampton, Paul H., Ludwick, Kevin J.
openaire   +2 more sources

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