Results 31 to 40 of about 613,587 (145)

Dynamics of Chinese Export Comparative Advantage: Analysis Based on RSCA Index

Journal of Mathematics, 2022
Based on RSCA index, using kernel density estimation, Markov chain transition probability matrix, and survival analysis method, this paper analyzes the dynamics of Chinese export comparative advantage from 2001 to 2020 and draws the following conclusions.
Li Wang, Tian-Le Sun, Zheng-Qun Cai
doaj   +1 more source

Parameter estimation in stochastic oscillators based on transition probability function decomposition

Open Physics
The problem of parameter estimation in stochastic oscillators is considered using a decomposition of the transition probability density in terms of Hermite polynomials.
Ivanenko Dmytro, Pogorielov Rostyslav
doaj   +1 more source

Effective field theories for dark matter pairs in the early universe: cross sections and widths

Journal of High Energy Physics, 2023
In order to predict the cosmological abundance of dark matter, an estimation of particle rates in an expanding thermal environment is needed. For thermal dark matter, the non-relativistic regime sets the stage for the freeze-out of the dark matter energy
S. Biondini, N. Brambilla, G. Qerimi, A. Vairo   +3 more
doaj   +1 more source

First-principles accurate total-energy surfaces for polar structural distortions of BaTiO3, PbTiO3, and SrTiO3: consequences to structural transition temperatures

, 2010
Specific forms of the exchange correlation energy functionals in first-principles density functional theory-based calculations, such as the local density approximation (LDA) and generalized-gradient approximations (GGA), give rise to structural lattice ...
H. F. Kay, K. M. Rabe, Masaya Iwamoto, Takeshi Nishimatsu, Umesh V. Waghmare, Yoshiyuki Kawazoe   +5 more
core   +1 more source

A Study on the Distribution Dynamics, Regional Disparities, and Convergence of China’s Energy Transition

Energies
Energy transition, as a crucial aspect of the country’s high-value-added economic development, involves the construction of an energy transition index system and empirical analysis using methods such as the entropy weighting method, kernel density ...
Peifang Tian, Zhiyuan Gao, Yu Hao
doaj   +1 more source

Manifestation of critical effects in environmental parameter estimation using a quantum sensor under dynamical control

Materials Today Quantum
Quantum probes offer a powerful platform for exploring environmental dynamics, particularly through their sensitivity to decoherence processes. In this work, we investigate the emergence of critical behavior in the estimation of the environmental memory ...
M. Cristina Rodríguez, Analia Zwick, Gonzalo A. Álvarez   +2 more
doaj   +1 more source

Statistics of electric-quadrupole lines in atomic spectra

, 2012
In hot plasmas, a temperature of a few tens of eV is sufficient for producing highly stripped ions where multipole transitions become important. At low density, the transitions from tightly bound inner shells lead to electric-quadrupole (E2) lines which ...
Bauche, Jacques, Bauche-Arnoult, Claire, Gilleron, Franck, Pain, Jean-Christophe   +3 more
core   +1 more source

Z Boson Emission by a Neutrino in de Sitter Expanding Universe

Particles
The production of Z bosons in emission processes by neutrinos in the expanding de Sitter universe is studied by using perturbative methods. The total probability and transition rate for the spontaneous emission of a Z boson by a neutrino is computed ...
Mihaela-Andreea Băloi, Cosmin Crucean, Diana Dumitrele   +2 more
doaj   +1 more source

Estimation of the relative contributions to the electronic energy transfer rates based on Förster theory: The case of C-phycocyanin chromophores

Biophysics and Physicobiology, 2021
In the present study, we provide a reformulation of the theory originally proposed by Förster which allows for simple and convenient formulas useful to estimate the relative contributions of transition dipole moments of a donor and acceptor (chemical ...
Kenji Mishima, Mitsuo Shoji, Yasufumi Umena, Mauro Boero, Yasuteru Shigeta   +4 more
doaj   +1 more source

GIS-Based Analysis of Retail Spatial Distribution and Driving Mechanisms in a Resource-Based Transition City: Evidence from POI Data in Taiyuan, China

ISPRS International Journal of Geo-Information
Rapid urbanization in China has reshaped retail spatial structures, creating challenges of accessibility and service equity. This study employs a Geographic Information Systems (GIS)-based analytical framework to examine the spatial distribution and ...
Xinrui Luo, Rosniza Aznie Che Rose, Azahan Awang   +2 more
doaj   +1 more source