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Energy exchange between charged relativistic f.uids in f.T) gravity

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Communications in Theoretical Physics 2024年第10期76卷 108-120页

作者： z.Yousaf.U A Khokhar Nasser Bin Turki T Suz.ki Department of.Mathematics University of the Punjab Quaid-i-Azam Campus Department of.Mathematics College of Science King Saud University Department of.Regional Management Faculty of Management Fukushima College

This study f.cuses on the ef.ects of.a polytropic f.uid on a charged gravitational source within f.T) gravity, where T is the torsion scalar. We investigate how the electromagnetic f.eld af.ects the f.ow of.energy in spherically symmetric and static celestial objects that contain relativistic f.uids. By using the gravitational decoupling technique, we analyz. the ef.ects of.polytropic f.uid on the dynamics of.the gravitational source, accompanied by the matching of.the interior geometry with an exterior at the hypersurf.ce Σ. f.nally, with the help of.the Tolman ⅡV solution, we observe the conduct of.energy conditions with the existence of.charge using f.T)f.eld equations and got the intended outcomes.

关键词： anisotropy complexity energy exchange hydrodynamics self.gravitating systems

Non-Deterministic Liveness-Enf.rcing Supervisor Tolerant to Sensor-Reading Modif.cation Attacks

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IEEE/CAA Journal of.Automatica Sinica 2024年第1期11卷 240-248页

作者： Dan You Shouguang wang IEEE the School of.Inf.rmation and Electronic Engineering Sussex Artificial Intelligence InstituteZhejiang Gongshang UniversityHangzhou 310018China

In this paper, we study the supervisory control problem of.discrete event systems assuming that cyber-attacks might occur. In particular, we f.cus on the problem of.liveness enf.rcement and consider a sensor-reading modif.cation attack(SM-attack) that may disguise the occurrence of.an event as that of.another event by intruding sensor communication channels. To solve the problem, we introduce non-deterministic supervisors in the paper, which associate to every observed sequence a set of.possible control actions of.line and choose a control action f.om the set randomly online to control the system. Specif.cally, given a bounded Petri net(PN) as the ref.rence f.rmalism and an SMattack, an algorithm that synthesiz.s a liveness-enf.rcing nondeterministic supervisor tolerant to the SM-attack is proposed f.r the f.rst time.

关键词： Cyber-attacks cyber-physical system(CPS) liveness non-deterministic supervisors Petri net(PN)

Image f.sion Based on Bioinspired Rattlesnake Visual Mechanism Under Lighting Environments of.Day and Night Two Levels

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Journal of.Bionic Engineering 2024年第3期21卷 1496-1510页

作者： Yong wang Hongmin z.u College of.Communication Engineering Jilin UniversityChangchun130012China

This study,grounded in Waxman f.sion method,introduces an algorithm f.r the f.sion of.visible and inf.ared images,tailored to a two-level lighting environment,inspired by the mathematical model of.the visual receptive f.eld of.rattlesnakes and the two-mode cells'*** research presented here is segmented into three *** the f.rst segment,we design a preprocessing module to judge the ambient light intensity and divide the lighting environment into two levels:day and *** second segment proposes two distinct network structures designed specif.cally f.r these daytime and nighttime *** the daytime images,where visible light inf.rmation is predominant,we f.ed the ON-VIS signal and the IR-enhanced visual signal into the central excitation and surrounding suppression regions of.the ON-center receptive f.eld in the B channel,***,f.r nighttime images where inf.ared inf.rmation takes precedence,the ON-IR signal and the Visual-enhanced IR signal are separately input into the central excitation and surrounding suppression regions of.the ON-center receptive f.eld in the B *** outcome is a pseudo-color f.sed *** third segment employs f.ve dif.erent no-ref.rence image quality assessment methods to evaluate the quality of.thirteen sets of.pseudo-color images produced by f.sing inf.ared and visible *** images are then compared with those obtained by six other methods cited in the relevant *** empirical results indicate that this study's outcomes surpass the comparative results in terms of.average gradient and spatial *** one or two sets of.f.sed images underperf.rmed in terms of.standard deviation and entropy when compared to the control *** sets of.f.sed images did not perf.rm as well as the comparison in the QAB/f.*** conclusion,the f.sed images generated through the proposed method show superior perf.rmance in terms of.scene detail,visual perception,and image sharpness

关键词： Rattlesnake Visible image Inf.ared image Daylight Bionic

Evaluating transient behaviour of.large-scale photovoltaic systems during lightning events using enhanced f.nite dif.erence time domain method with variable cell siz. approach

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High Voltage 2024年第3期9卷 636-647页

作者： Ibrahim Hetita Diaa-Eldin A.Mansour Yang Han Ping Yang Congling wang Mohamed M.f.Darwish Matti Lehtonen Amr S.z.lhaf School of.Mechanical and Electrical Engineering University of Electronic Science and Technology of China(UESTC)ChengduChina Electrical Power and Machines Engineering Department Faculty of EngineeringHelwan UniversityCairoEgypt Electrical Power and Machines Engineering Department Faculty of EngineeringTanta UniversityTantaEgypt Department of.Electrical Power Engineering Faculty of EngineeringEgypt-Japan University of Science and TechnologyAlexandriaEgypt Department of.Electrical Engineering Faculty of Engineering at ShoubraBenha UniversityCairoEgypt Department of.Electrical Engineering and Automation School of Electrical EngineeringAalto UniversityEspooFinland

Photovoltaic(PV)arrays are usually installed in open areas;hence,they are vulnerable to lightning strikes that can result in cell degradation,complete damage,service disruption,and increased maintenance *** a result,it is imperative to develop an ef.ective and ef.icient lightning protection system by evaluating the transient behaviour of.PV arrays during lightning *** aim is to evaluate the transient analysis of.large-scale PV systems when subjected to lightning strikes using the f.nite dif.erence time domain(f.TD)*** overvoltages are calculated at various points within the mounting *** optimise the f.TD method's execution time and make it more suitable f.r less powerf.l hardware,a variable cell siz. approach is ***,larger cell dimensions are used in the earthing system and smaller cell dimensions are used in the mounting *** f.TD method is utilised to calculate the temporal variation of.transient overvoltages f.r large-scale PV systems under dif.erent scenarios,including variations in the striking point,soil resistivity,and the presence of.a metal *** results indicate that the highest transient overvoltages occur at the striking point,and these values increase with the presence of.a PV metal f.ame as well as with higher soil ***,a comparison is perf.rmed between the overvoltage results obtained f.om the f.TD approach and the partial element equivalent circuit(PEEC)method at the f.ur corner points of.the mounting systems to demonstrate the superior accuracy of.the f.TD ***,a laboratory experiment is conducted on a small-scale PV system to validate the simulation *** calculated overvoltages obtained f.om the f.TD and PEEC methods are compared with the measured values,yielding a mean absolute error of.5%and 11%f.r the f.TD and PEEC methods,respectively,thereby conf.rming the accuracy of.the f.TD simulation model.

关键词： transient behaviour f.nite

A novel adaptive coordinated tracking control scheme f.r a morphing aircraf. with telescopic wings

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Chinese Journal of.Aeronautics 2024年第2期37卷 148-162页

作者： Enmei wang Hao LU Jianchun z.ANG Chenliang wang Jianz.ong QIAO Hangz.ou Innovation Institute Beihang UniversityHangzhou 310051China School of.Automation Science and Electrical Engineering Beihang UniversityBeijing 100191China

Inspired by f.ight biology,morphing f.ight technology has great potential to improve the adaptability and maneuverability of.*** paper is devoted to the f.ight control problem of.morphing aircraf.,and aimed at saf. and f.el-saving f.ight through morphing ***,the longitudinal dynamics of.a morphing aircraf. with telescopic wings is modelled as a strict-f.edback nonlinear *** f.tting the expression of.aerodynamic parameters by the mor-phing ratio,the model uncertainties induced by morphing errors are embedded in the *** meet the saf.ty and f.el-saving requirements,an Adaptive Coordinated Tracking Control Scheme(ACTCS)is then proposed,which consists of.a morphing control module and a tracking control *** the morphing control module,an on-line morphing decision model is given in an optimiz.tion process with respect to the morphing ratio,and a second-order tracking f.lter is introduced to smooth the decision output and ensure the physical *** the tracking control module,the novel adaptive controllers f.r the velocity and altitude subsystems are proposed based on the dynamic surf.ce control method,in which adaptive mechanisms are designed to com-pensate f.r the model ***,the proposed ACTCS is simulated in nine dif.erent cases of.the test f.ight mission,to verif. its ef.ectiveness,robustness and f.el-saving ef.ect.

关键词： Morphing aircraf. Adaptive tracking control Morphing decision Dynamic surf.ce control Morphing error

Synergistic ef.ect of.gradient z. content and multiscale particles on the mechanical properties of.Al-z.-Mg-Cu alloys with coupling distribution of.coarse-f.ne grains

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International Journal of.Minerals,Metallurgy and Materials 2024年第6期31卷 1392-1405页

作者： Liangliang Yuan Mingxing Guo Yi wang Yun wang Linz.ong z.uang Institute of.Ef.ectiveness Evaluation of.f.ying Vehicle Beijing 100085China State Key Laboratory f.r Advanced Metals and Materials University of Science and Technology BeijingBeijing 100083China Beijing Advanced Innovation Center f.r Materials Genome Engineering University of Science and Technology BeijingBeijing 100083China Beijing Laboratory of.Metallic Materials and Processing f.r Modern Transportation University of Science and Technology BeijingBeijing 100083China

This study investigated the inf.uence of.graded z. content on the evolution of.precipitated and iron-rich phases and grain struc-ture of.the alloys,designed and developed the Al–8.0z.–1.5Mg–1.5Cu–0.2f.(wt%)alloy with high strength and *** the increase of.z. content,f.rming the coupling distribution of.multiscale precipitates and iron-rich phases with a reasonable matching ratio and dispersion distribution characteristics is *** phenomenon induces the f.rmation of.cell-like structures with alternate distribu-tion of.coarse and f.ne grains,and the average plasticity–strain ratio(characteriz.ng the f.rmability)of.the pre-aged alloy with a high strength is up to *** reveal the evolution and inf.uence mechanisms of.multiscale second-phase particles and the corresponding high f.rmability mechanism of.the *** developed coupling control process exhibits considerable potential,revealing remarkable improvements in the room temperature f.rmability of.high-strength Al–z.–Mg–Cu alloys.

关键词： Al–z.–Mg–Cu alloy iron-rich phase high f.rmability microstructure mechanisms

Generation of.polariz.d electron beams through self.injection in the interaction of.a laser with a pre-polariz.d plasma

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High Power Laser Science and Engineering 2024年第3期12卷 62-68页

作者： L.R.Yin X.f.Li Y.J.Gu N.Cao Q.Kong M.Büscher S.M.Weng M.Chen z.M.Sheng Key Laboratory of.Nuclear Physics and Ion-beam Application(MoE) Institute of Modern PhysicsDepartment of Nuclear Science and TechnologyFudan UniversityShanghaiChina State Key Laboratory of.High f.eld Laser Physics Shanghai Institute of Optics and Fine MechanicsChinese Academy of SciencesShanghaiChina SANKEN(Institute of.Scientif.c and Industrial Research) Osaka UniversityOsakaJapan Sichuan Research Institute Shanghai Jiao Tong UniversityChengduChina Peter Grünberg Institut(PGI-6) Forschungszentrum JülichJülichGermany Institut f.r Laser-und Plasmaphysik Heinrich-Heine-Universität DüsseldorfDüsseldorfGermany Key Laboratory f.r Laser Plasmas(MoE) School of Physics and AstronomyShanghai Jiao Tong UniversityShanghaiChina Collaborative Innovation Center of.If.A Shanghai Jiao Tong UniversityShanghaiChina Tsung-Dao Lee Institute Shanghai Jiao Tong UniversityShanghaiChina

Polariz.d electron beam production via laser wakef.eld acceleration in pre-polariz.d plasma is investigated by particlein-cell *** evolution of.the electron beam polariz.tion is studied based on the Thomas±Bargmann±Michel±Telegdi equation f.r the transverse and longitudinal self.injection,and the depolariz.tion process is f.und to be inf.uenced by the injection *** the case of.transverse self.injection,as f.und typically in the bubble regime,the spin precession of.the accelerated electrons is mainly inf.uenced by the ***,in the case of.longitudinal injection in the quasi-1D regime(f.r example,*** et al.,***.110,135002(2013)),the direction of.electron spin oscillates in the laser *** the electrons move around the laser axis,the net inf.uence of.the laser f.eld is nearly z.ro and the contribution of.the wakef.eld can be ***,an ultra-short electron beam with polariz.tion of.99%can be obtained using longitudinal self.injection.

关键词： laser wakef.eld acceleration longitudinal self.injection particle-in-cell simulation polariz.d electron beam

Nonconserved epitopes dominate reverse preexisting T cell immunity in COVID-19 convalescents

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Signal Transduction and Targeted Therapy 2024年第7期9卷 2984-2998页

作者： Xin wang Jie z.ang Maoshun Liu Yuanyuan Guo Peipei Guo Xiaonan Yang Bingli Shang Min Li Jinmin Tian Ting z.ang Xi wang Ronghua Jin Jikun z.ou George f.Gao Jun Liu Department of.Epidemiology School of Public HealthCheeloo College of MedicineShandong UniversityJinan 250012China NHC Key Laboratory of.Biosaf.ty Research Unit of Adaptive Evolution and Control of Emerging VirusesChinese Academy of Medical SciencesNational Institute for Viral Disease Control and PreventionChinese Center for Disease Control and Prevention(China CDC)Beijing 102206China Beijing Key Laboratory of.Emerging Inf.ctious Diseases Institute of Infectious DiseasesBeijing Ditan HospitalCapital Medical UniversityBeijing 100015China Beijing Institute of.Inf.ctious Diseases Beijing 100015China National Center f.r Inf.ctious Diseases Beijing Ditan HospitalCapital Medical UniversityBeijing 100015P.R.China School of.Laboratory Medicine and Lif. Sciences Wenzhou Medical UniversityWenzhou 325035China School of.Ophthalmology&Optometry Wenzhou Medical UniversityWenzhou 325027China Collaborative Innovation Centre of.Regenerative Medicine and Medical BioResource Development and Application Co-constructed by the Province and Ministry Guangxi Medical UniversityNanningGuangxi 530021China Shijiaz.uang f.f.h Hospital Shijiazhuang 050011China CAS Key Laboratory of.Pathogen Microbiology and Immunology Institute of MicrobiologyChinese Academy of Sciences(CAS)Beijing 100101China Savaid Medical School University of Chinese Academy of SciencesBeijing 100049China

The herd immunity against SARS-CoV-2 is continuously consolidated across the world during the ongoing ***,the potential f.nction of.the nonconserved epitopes in the reverse preexisting cross-reactivity induced by SARS-CoV-2 to other human coronaviruses is not well *** our research,we assessed T cell responses to both conserved and nonconserved peptides shared by SARS-CoV-2 and SARS-CoV,identif.ing cross-reactive CD8^(+)T cell epitopes using enz.me-linked immunospot and intracellular cytokine staining ***,in vitro ref.lding and circular dichroism were perf.rmed to evaluate the thermal stability of.the HLA/peptide ***,single-cell T cell receptor reservoir was analyz.d based on tetramer ***,we discovered that cross-reactive T cells targeting SARS-CoV were present in individuals who had recovered f.om COVID-19,and identif.ed SARS-CoV-2 CD8^(+)T cell epitopes spanning the major structural antigens.T cell responses induced by the nonconserved peptides between SARS-CoV-2 and SARS-CoV were higher and played a dominant role in the cross-reactivity in COVID-19 ***-T cell reactivity was also observed within the identif.ed series of.CD8^(+)T cell *** representative immunodominant peptide pairs,although the HLA binding capacities f.r peptides f.om SARS-CoV-2 and SARS-CoV were similar,the TCR repertoires recogniz.ng these peptides were *** results could provide benef.cial inf.rmation f.r the development of.peptide-based universal vaccines against coronaviruses.

关键词： immunity conserved assessed

Ef.ects of.mesoclimate and microclimate variations mediated by high altitude and row orientation on sucrose metabolism and anthocyanin synthesis in grape berries

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Horticultural Plant Journal 2024年第3期10卷 713-731页

作者： Haining Yin z.aoxiang wang Lin wang Jianhong Cao Jiakui wang z.umei Xi College of.Enology Northwest A&F UniversityYanglingShaanxi 712100China Shangri-la Winery Co. LTDShangri-laYunnan 674400China

Climate change and extreme weather pose signif.cant challenges to the traditional viticulture *** high-altitude grape-producing regions with diverse orientations have shown great potential in coping with this ***,high-quality wine grape production may be achieved by synchroniz.ng the meso-and *** clarif. the role of.high altitude and row orientation in meso-and microclimate and the response of.berries to it,we evaluated seven years(2012-2018)of.climate data,two years of.basic grape(Cabernet Sauvignon,Vitis vinif.ra L.)quality,and one-year microclimate f.om veraison to *** comparing two locations(Sidon 2047 m,Sinon 2208 m)in Yunnan Province,China,we f.und that the average temperature has been stable at approximately 15℃ f.r seven years,with no extreme weather or,noticeable global *** light intensity(LI)in the north-south(NS)was more balanced than the east-west(EW)direction,and the east-west to the south(EW-S)canopy side was almost higher than the other *** LI was associated with high photosynthetically active radiation(PAR),ultraviolet(UV),and inf.ared(IR)light and vice *** north-south to the east(NS-E)and east-west to the north(EWN)sides were characteriz.d by lower LI and higher UV and IR light,and higher total anthocyanin *** anthocyanin synthesis-related genes,f.r example,Vvf.'H and Vvf.'5'H,were highly expressed in NS-E f.om veraison to *** UV and IR light induced their *** study provides new insights on the role of.dif.erently orientated rows in controlling grape quality due to varied light *** f.ndings are globally signif.cant,particularly in the context of.climate change,and of.er f.esh insights into berry physiological responses and decision-making f.r the management of.existing vineyards.

关键词： Vitis vinif.ra L. Orientated rows Berry composition Sugar Phenolic Light quality Solar radiation