نتایج جستجو برای: mechanical entropy

تعداد نتایج: 300002  

Journal: :Frontiers in Materials 2021

In this study high-entropy alloys (HEAs) were devised based on a new alloy design concept, which breaks with traditional methods for conventional alloys. As novel alloy, HEAs have demonstrated excellent engineering properties and possible combinations of diverse their unique tunable microstructures properties. This review article explains the phase transition mechanism mechanical under thermal-...

Journal: :Entropy 2023

The NbTaHfTiZrV0.5 is a refractory multi-principal-element alloy with high strength and good ductility at room temperature. It important for possible high-temperature applications to investigate the deformation mechanism of different temperatures using tensile tests. In this investigation, tests were conducted temperature 1273 K on sheet materials fabricated by cold rolling combined annealing t...

Journal: :Entropy 2011
Karan H. Mistry Ronan K. McGovern Gregory P. Thiel Edward K. Summers Syed M. Zubair John H. Lienhard V

Increasing global demand for fresh water is driving the development and implementation of a wide variety of seawater desalination technologies. Entropy generation analysis, and specifically, Second Law efficiency, is an important tool for illustrating the influence of irreversibilities within a system on the required energy input. When defining Second Law efficiency, the useful exergy output of...

2015
Jagat Narain Kapur J. N. Kapur

The first section gives the measure of uncertainty given by Shannon (1948) and the generalizations thereof by Schvitzenberger (1954), Kullback (1959), Renyi (1961,1965), Kapur (1967, 1968), and Rathie (1970). It gives some postulates characterizing Shannon's entropy, Renyi's entropy of order a and our entropy of order a and type P. It also gives some properties of this most general type of entr...

1999
Jeongwon Ho Gungwon Kang

We have considered the divergence structure in the brick-wall model for the statistical mechanical entropy of a quantum field in thermal equilibrium with a black hole which rotates. Especially, the contribution to entropy from superradiant modes is carefully incorporated, leading to a result for this contribution which corrects some previous errors in the literature. It turns out that the previ...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه تهران - دانشکده فنی 1387

چکیده ندارد.

Journal: :Entropy 2016
Nantian Huang Lihua Fang Guowei Cai Dianguo Xu Huaijin Chen Yonghui Nie

In order to improve the identification accuracy of the high voltage circuit breakers’ (HVCBs) mechanical fault types without training samples, a novel mechanical fault diagnosis method of HVCBs using a hybrid classifier constructed with Support Vector Data Description (SVDD) and fuzzy c-means (FCM) clustering method based on Local Mean Decomposition (LMD) and time segmentation energy entropy (T...

Journal: :Energies 2022

Electrostatic energy harvesters convert kinetic into electrical via variable capacitors. Efforts to improve their power output are hampered by a lack of understanding the fundamental limit for conversion efficiency. In heat engines, theoretical efficiency is intrinsically related entropy and second law thermodynamics. Laying foundation similar concepts may be necessary establishing limit. Thus,...

2014
Jose Amigo Miguel Hernandez David Arroyo

Entropy is a general concept that appears in different settings with different meanings. Thus, it measures disorder in physics, uncertainty in information theory, minimum code length in coding theory, (pseudo-)randomness in measure-preserving dynamical systems, complexity in topological dynamics, and algorithmic complexity in computer science. As for its importance, let us remind that it enters...

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