Results 41 to 50 of about 758,624 (339)

Application of K-PSO Clustering Algorithm and Game Theory in Rock Mass Quality Evaluation of Maji Hydropower Station

Applied Sciences, 2023
In this study, the K-means algorithm based on particle swarm optimization (K-PSO) and game theory are introduced to establish the quality evaluation model of a rock mass.
Yunkai Ruan, Jinzi Chen, Zhongmou Fan, Tanhua Wang, Jianguo Mu, Ranran Huo, Wei Huang, Weicheng Liu, Yunjian Li, Yunqiang Sun   +9 more
doaj   +1 more source

Safety Index, Evaluation Model, and Comprehensive Evaluation Method of Power Information System under Classified Protection 2.0

Energies, 2023
Aiming at the problems of the low integration of the current power information system security assessment method with classified protection 2.0, strong subjectivity, and the vague quantification of objective indexes, this article proposes to establish a ...
Gangjun Gong, Qinglin Yuan, Jiaxuan Yang, Bo Zhou, Zeming Lv, Haixia Yang, Mingfeng Xu   +6 more
doaj   +1 more source

Updating Probabilities [PDF]

, 2006
We show that Skilling's method of induction leads to a unique general theory of inductive inference, the method of Maximum relative Entropy (ME). The main tool for updating probabilities is the logarithmic relative entropy; other entropies such as those ...
Caticha, Ariel, Giffin, Adom
core   +2 more sources

Entropy of the FRW cosmology based on the brick wall method

, 2008
The brick wall method in calculations of the entropy of black holes can be applied to the FRW cosmology in order to study the statistical entropy. An appropriate cutoff satisfying the covariant entropy bound can be chosen so that the entropy has a ...
't Hooft, 't Hooft, Akbar, Bak, Bekenstein, Bekenstein, Bekenstein, Bousso, Cai, Cai, Cai, Carroll, Demers, Edwin J. Son, Fischler, Ghosh, Hawking, Hawking, Hayward, Hayward, He, Ho, Jacobson, Jacobson, Kim, Kreuzer, Liu, Misner, Mukohyama, Myungseok Yoon, Sheykhi, Susskind, Wontae Kim, Xiang, Zhou, Zhu   +35 more
core   +1 more source

Entropy and Adjoint Methods

Journal of Scientific Computing, 2019
Aerodynamic drag can be partially approximated by the entropy flux across fluid domain boundaries with a formula due to Oswatitsch. In this paper, we build the adjoint solution that corresponds to this representation of the drag and investigate its relation to the entropy variables, which are linked to the integrated residual of the entropy transport ...
openaire   +3 more sources

The Cross-Entropy Method for Estimation [PDF]

, 2013
This chapter describes how difficult statistical estimation problems can often be solved efficiently by means of the cross-entropy (CE) method. The CE method can be viewed as an adaptive importance sampling procedure that uses the cross-entropy or Kullback–Leibler divergence as a measure of closeness between two sampling distributions. The CE method is
Kroese, Dirk P., Rubinstein, Reuven Y., Glynn, Peter W.   +2 more
openaire   +4 more sources

Computation of the Kolmogorov-Sinai entropy using statistitical mechanics: Application of an exchange Monte Carlo method

, 2006
We propose a method for computing the Kolmogorov-Sinai (KS) entropy of chaotic systems. In this method, the KS entropy is expressed as a statistical average over the canonical ensemble for a Hamiltonian with many ground states.
Hayashi, Kumiko, Sasa, Shin-ichi
core   +1 more source

Non-Supersymmetric Attractors and Entropy Function [PDF]

, 2006
We study the entropy of non-supersymmetric extremal black holes which exhibit attractor mechanism by making use of the entropy function. This method, being simple, can be used to calculate corrections to the entropy due to higher order corrections to the
A. Giryavets, A. Sen, A. Sen, B. Chandrasekhar, E.P. Verlinde, G. Lopes Cardoso, Hajar Ebrahim, J.M. Maldacena, K. Goldstein, M. Guica, Mohsen Alishahiha, P. Prester, P.K. Tripathy, R. Dijkgraaf, R. Kallosh, R. Kallosh, T. Jacobson, T. Mohaupt, V. Pestun   +18 more
core   +1 more source

Optimization of the Best Polar Site for Antioxidant Activity of Panax ginseng Extract Based on Entropy Weight Method and Grey Relational Analysis Combined with Component Analysis

Shipin gongye ke-ji
Objective: The differences in antioxidant activity of different polar parts of panax ginseng were investigated to screen the best active parts. Method: In this study, the water extract of Panax ginseng was extracted by petroleum ether, chloroform, ethyl ...
Zhijia XU, Shengnan LI, Wenwen ZHOU, Fengqin XIAO, Hui LIU, Yiliu YANG, Guangzhe LI, Mingming YAN   +7 more
doaj   +1 more source

Effects of Water and Nitrogen Regulation on Growth, Water-fertilizer Use Efficiency and Soil Water-salt Distribution in Sunflower

Guan'gai paishui xuebao, 2023
【Objective】 The aim of this paper is to propose a reasonable water and fertilizer application system for the Yellow River water drip irrigation project in the salinized irrigation area on the South bank of the Yellow River in Ordos Dalat Banner. 【Method】
HE Rui, TONG Changfu, WANG Jun, QIN Ziyuan, ZHEN Zhixin, GUO Shuhao, WANG Hu, LI Xiaoli   +7 more
doaj   +1 more source