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Effect of Excited and Fourth Generation Leptons in Lepton Flavor Violating μ− → e- 2γ Decay

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chinese Physics Letters 2011年第8期28卷 51-53页

作者： S.c.İnan Department of Physics Cumhuriyet UniversitySivas 58140Turkey

We study the lepton flavor violatingμ−→e-2γdecay induced by the mediation of heavy leptons,such as the excited and fourth generation *** of these leptons inμ−→e-2γdecay are *** is found that the branching ratio of this decay is very sensitive to excited and fourth generation ***,we obtain the bounds on model parameters by using the current experimental limit of this decay.

关键词： decay excited branching

Energy recovery from solid wastes in china and a Green-BRI mechanism for advancing sustainable waste management of the global South

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Waste Disposal and Sustainable Energy 2023年第3期5卷 309-321页

作者： A.c.(Thanos)Bourtsalas Earth and Environmental Engineering Columbia UniversityNew YorkNYUSA

The only proven alternative for the recovery of value from materials that cannot be recycled is waste to energy(WTE).The first part of the paper provides evidence as to the advantages of WTE over landfilling and examines the role of WTE in the urban *** second part of the paper is a holistic analysis of the legislative instruments used in china,that have led to the construction of nearly 400 plants from 2005 to *** chinese government was instrumental in the development of Public and Private Partnerships(PPPs),in form of Build-Operate-Transfer(BOT),or Build-Own-Operate(BOO)models with a lifetime of 20 years to 30 *** government accepts most of the investment risk by participating in the equity structure,providing strong tax and policy incentives,and becoming fully engaged in public education and acceptance of new WTE *** construction and operation of these plants by the private sector had to comply with the governmental performance standards in order to receive incentives,such as an appreciable credit over the price of electricity received by coal-fired *** last part of this paper examines how the elements of the chinese renewable energy and waste management laws,may be transposed to federal and state legislation for potential application in countries of the Belt and Road Initiative(BRI)region.

关键词： Waste to energy Renewable energy Belt and Road Initiative Public and private partnerships

The Kirkendall effect on erosion resistance of chrome-coated 25cr3Mo2WNiV and 30SiMn2MoV gun barrel steels

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Journal of Materials Science & Technology 2024年第10期177卷 246-255页

作者： c.H.Dou P.F.Jin c.Z.Wang J.J.Li c.Zhang J.F.Huang c.Zhang Key Laboratory for Advanced Materials Processing State State Key Laboratory for Advanced Metals and MaterialsUniversity of Science and Technology BeijingBeijing 100083China National Joint Engineering Research center for Abrasion control and Molding of Metal Materials School of Materials Science and EngineeringHenan University of Science and TechnologyLuoyang 471003China

This study aimed to investigate the erosion behavior and mechanism of a newly developed 25cr3Mo2WNiV steel with a chrome coating using promoted ignition combustion *** erosion threshold pressure and temperature of the chrome-coated 25cr3Mo2WNiV steel were determined to be 0.2 MPa and 254.3 K higher than those of traditional chrome-coated 30SiMn2MoV ***,Kirkendall voids and inter-diffusion between the cr coating and matrix were first observed before *** improved erosion resistance of the chrome-coated 25cr3Mo2WNiV steel was attributed to the suppression of the Kirkendall effect,which minimized heat generation at the cr/matrix interface by pre-venting oxygen diffusion and reducing oxygen affinity.

关键词： Erosion resistance Kirkendall effect cr coating Gun steel

Discovery of a pair instability supernova ignites excitement about the first stars

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Science china(Physics,Mechanics & Astronomy) 2023年第9期66卷 198-199页

作者： Timothy c.Beers Department of Physics and Astronomy and JINA center for the Evolution of the Elements University of Notre DameNotre Dame 46556USA

For decades,astronomers have predicted that Pair Instability Supernovae(PISNe)might occur when a massive star(140-260 solar masses,M☉)reaches the end of its life,and suffers a cataclysmic explosion due to the transformation of gamma rays in its interior into pairs of free electrons and positrons,robbing the star of the radiation pressure required to support itself against gravity.

关键词： stars massive supernova

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ON THE cAUcHY PROBLEM FOR AW-RAScLE SYSTEM WITH LINEAR DAMPING

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Acta Mathematica Scientia 2021年第1期41卷 311-318页

作者： Juan c.JUAJIBIOY Escuela de Matemdticas y Estadistica Universidad Pedagogica y Tecnològica de ColombiaTunja 15001BoyacaColombia

The existence of global BV solutions for the Aw-Rascle system with linear damping is *** order to get approximate solutions we consider the system in Lagrangian coordinates,then by using the wave front tracking method coupling with and suitable splitting algorithm and the ideas of[1]we get a sequence of approximate *** we show the convergence of this approximate sequence to the weak entropic solution.

关键词： wave front tracking global weak entropy solutions linear damping

Direct Graviton Production via Photon-Photon Fusion at the cERN-LHc

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chinese Physics Letters 2012年第3期29卷 63-66页

作者： S.c.İnan Department of Physics Cumhuriyet University58140SivasTurkey

The potential of pp→pγγp/→pGp process in scenarios of the Arkani-Hamed,Dimopoulos,Dvali(ADD)and Randall-Sundrum(RS)model at the LHc is examined,and 95%*** on the model parameters are *** is found that the sensitiv... 详细信息

关键词： reaction bounds LHc

Dynamics in the Parameter Space of a Neuron Model

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chinese Physics Letters 2012年第6期29卷 64-67页

作者： Paulo c.Rech Departamento de Fisica Universidade do Estado de Santa Catarina89219-710 JoinvilleBrazil

Some two-dimensional parameter-space diagrams are numerically obtained by considering the largest Lyapunov exponent for a four-dimensional thirteen-parameter Hindmarsh-Rose neuron *** different parameter planes are considered,and it is shown that depending on the combination of parameters,a typical scenario can be preserved:for some choice of two parameters,the parameter plane presents a comb-shaped chaotic region embedded in a large periodic *** is also shown that there exist regions close to these comb-shaped chaotic regions,separated by the comb teeth,organizing themselves in period-adding bifurcation cascades.

关键词： parameter chaotic shaped

Fault current Limitation with Superconducting YBcO Thin Films

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Tsinghua Science and Technology 2003年第3期8卷 334-341页

作者： c.Villard c.Peroz consortium of Research for the Emergence of Advanced Technologies(cRETA)and center of Research on Very Low Temperatures(cRTBT) National Center for Scientific Research(CNRS)25 Avenue des MartyrsBP 166X GrenobleFrance-European CommunityConsortium of Research for the Emergence of Advanced Technologies(CRETA)and Center of Research on Very Low Temperatures(CRTBT)National Center for Scientific Research(CNRS)25 Avenue des MartyrsBP 166X GrenobleFrance-European Community

The behavior of YBcO/metal bilayers under transport currents was explored in the framework of fault current limitation (FcL). Properties of the superconducting-normal transition were first studied phenomenologically during sweep current experiments. For current rates higher than 500 A/s, the transition into the normal state was based on non-thermal phenomena and was characterized by a flux creep regime ended by a jump into the normal state. At lower sweep rates, a total diversion of the current in the metallic shunt was observed for temperatures higher than 85K. In this regime, a partial recovery of the superconducting state took place due to a finite thermal resistance between the superconducting and the metallic films. These two properties of partial diversion into the shunt and of fast switching for a quick rise of the current during a default were exploited for current limitation at 77 K. FcL experiments at 50 Hz show that YBcO/Au bilayers limit the current in about 1ms at a value of 2. 5/c by developing electrical fields as high as 3kV/m. Moreover, a recovery of the zero resistance state could occur under rated mode. A straightforward application of this property would be the transformer connection. Finally, results on Dc current limitation and recovery under nominal mode were presented for the first time.

关键词： fault current limiters thin films YBcO dissipation superconductors

The dynamics of a symmetric coupling of three modified quadratic maps

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chinese Physics B 2013年第8期22卷 233-237页

作者： Paulo c. Rech Departamento de Física Universidade do Estado de Santa Catarina89219-710 Joinville Brazil

We investigate the dynamical behavior of a symmetric linear coupling of three quadratic maps with exponential terms, and identify various interesting features as a function of two control parameters. In particular, we investigate the emergence of quasiperiodic states arising from Naimark-Sacker bifurcations of stable period-l, period-2, and period-3 orbits. We also investigate the multistability in the same coupling. Lyapunov exponents, parameter planes, phase space portraits, and bifurcation diagrams are used to investigate transitions from periodic to quasiperiodic states, from quasiperiodic to mode-locked states and to chaotic states, and from chaotic to hyperchaotic states.

关键词： Naimark-Sacker bifurcation quasiperiodicity chaos hyperchaos