Results 1 to 10 of about 12,436,754 (287)

Seeking Evolution of Dark Energy [PDF]

The 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^{*}) =
A. Friedmann, A. Shafieloo, A.G. Riess, A.G. Walker, C.L. Bennett, C.M. Will, E.V. Linder, F.-Y. Wang, G. Lemaître, H.P. Robertson, H.P. Robertson, H.P. Robertson, J.-M. Virey, Kevin J. Ludwick, M. Chevallier, P.H. Frampton, P.J. Steinhardt, Paul H. Frampton, R.A. Daly, S. Perlmutter   +19 more
core   +5 more sources

Energy Evolution and Acoustic Emission Characteristics of Uniaxial Compression Failure of Anchored Layered Sandstone

Frontiers in Earth Science, 2022
To study the energy evolution and acoustic emission characteristics of layered sandstone under anchorage in the process of deformation and failure, the sandstone samples from Chuxiong Yi Autonomous Prefecture, Yunnan Province were selected for uniaxial ...
Yang Yu, Da-Cheng Zhao, Guang-Liang Feng, Guang-Liang Feng, Da-Xin Geng, Hao-Sen Guo   +5 more
doaj   +2 more sources

Analysis of Energy Evolution Characteristics of Salt Rock Under Different Loading Rates

Frontiers in Earth Science, 2022
The existing uniaxial compression test results of salt rock under different loading rates are used to study its energy evolution characteristics during deformation and failure in this study. First of all, the influence of loading rate on the total energy
J. B. Wang, J. B. Wang, X. Liu, X. Liu, Q. Zhang, Q. Zhang, Z. P. Song, Z. P. Song   +7 more
doaj   +2 more sources

INFORMATION, ENERGY, AND EVOLUTION [PDF]

, 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.
Burgin, Dr. Mark, Simon, Irving
core   +2 more sources

Fractal Characteristics and Energy Evolution Analysis of Rocks under True Triaxial Unloading Conditions

Fractal and Fractional
To investigate the mechanical properties and energy evolution laws of rocks under true triaxial unloading conditions, a study was conducted using a true triaxial rock testing system on three different types of rocks: coal, sandy mudstone, and siltstone ...
Cheng Pan, Chongyan Liu, Guangming Zhao, Wei Yuan, Xiao Wang, Xiangrui Meng   +5 more
doaj   +2 more sources

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

E3S 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, Santiangeli Adriano, Zuccari Fabrizio, Ortenzi Fernando, Genovese Antonino, Valentini Maria Pia   +5 more
doaj   +1 more source

An Evolution Based on Various Energy Strategies [PDF]

Entropy, 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

Frontiers 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, Kai Fang, Kai Fang, Chen Wang, Tong-Bin Zhao, Tong-Bin Zhao, Xiu-Feng 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

Energies, 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, Rongwei Guo, Shichuan Zhang, Bing Chen, Haodong Yan, Wenhang Meng, Dan Zheng   +6 more
doaj   +1 more source

Data-driven next-generation smart grid towards sustainable energy evolution: techniques and technology review

Protection and Control of Modern Power Systems, 2023
Meteorological changes urge engineering communities to look for sustainable and clean energy technologies to keep the environment safe by reducing CO_2 emissions.
Faiaz Ahsan, Nazia Hasan Dana, S. Sarker, Li Li, S. M. Muyeen, M. F. Ali, Z. Tasneem, M. Hasan, S. H. Abhi, M. R. Islam, M. Ahamed, Md. Manirul Islam, Sajal Kumar Das, M. F. R. Badal, P. Das   +14 more
semanticscholar   +1 more source