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Virtually coupled train set control subject to space-time separation: A distributed economic MPC approach.with.emergency braking configuration

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h.gh.speed Railway 2024年第3期2卷 143-152页

作者： Luo X. Tang T. Wang L. Liu h. State Key Laboratory of Advanced Rail Autonomous Operation Beijing Jiaotong University Beijing 100044 China Department of Electrical and Computer Engineering University of California Riverside 92521 CA United States Beijing Zongh.ng Electro-Mech.nical Tech.ology Development Co. Ltd. Beijing 100081 China Sch.ol of Automation and Intelligence Beijing Jiaotong University Beijing 100044 China National Engineering Research.Center of Rail Transportation Operation and Control System Beijing Jiaotong University Beijing 100044 China

Th. emerging virtual coupling tech.ology aims to operate multiple train units in a Virtually Coupled Train Set (VCTS) at a minimal but safe distance. To guarantee collision avoidance, th. safety distance sh.uld be calculated using th. state-of-th.-art space-time separation principle th.t separates th. Emergency Braking (EB) trajectories of two successive units during th. wh.le EB process. In th.s case, th. minimal safety distance is usually numerically calculated with.ut an analytic formulation. Th.s, th. constrained VCTS control problem is h.rd to address with.space-time separation, wh.ch.is still a gap in th. existing literature. To solve th.s problem, we propose a Distributed Economic Model Predictive Control (DEMPC) approach.with.computation efficiency and th.oretical guarantee. Specifically, to alleviate th. computation burden, we transform implicit safety constraints into explicitly linear ones, such.th.t th. optimal control problem in DEMPC is a quadratic programming problem th.t can be solved efficiently. For th.oretical analysis, sufficient conditions are derived to guarantee th. recursive feasibility and stability of DEMPC, employing compatibility constraints, tube tech.iques and terminal ingredient tuning. Moreover, we extend our approach.with.globally optimal and distributed online EB configuration meth.ds to sh.rten th. minimal distance among VCTS. Finally, experimental results demonstrate th. performance and advantages of th. proposed approach.s. © 2024 Beijing Jiaotong University

关键词： Distributed model predictive control Economic model predictive control Emergency braking configuration Space-time separation Virtually coupled train set

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Ch.nese Expert Consensus on th. Diagnosis and Treatment of Adult Dermatomyositis (2022)#

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International Journal of Dermatology and Venereology 2024年第3期7卷 163-173页

作者： Cao h. Ch.n A.-J. Cui Y. Deng D.-Q. Gao X.-h. h. Y.-L. Kang X.-J. Jin h.-Z. Li C.-X. Li F. Li h.-J. Liao W.-J. Liu X.-M. Lu Q.-J. Lu Y. Pan M. Pan W.-h. Sh. X.-M. Sun Q. Tang K.-Y. Tao J. Wang Y. Xiao T. Zh.ng F.-R. Zh.ng h.-L. Department of Dermatology Ruijin Hospital Affiliated Shanghai Jiao Tong University School of Medicine Shanghai 200025 China Department of Dermatology First Affiliated Hospital of Chongqing Medical University Chongqing 400042 China Department of Dermatology China-Japan Friendship Hospital Beijing 100029 China Department of Dermatology The Second Affiliated Hospital of Kunming Medical University Yunnan Kunming 650101 China Department of Dermatology The First Hospital of China Medical University Liaoning Shenyang 110001 China Department of Dermatology Beijing Chaoyang Hospital Affiliated to Capital Medical University Beijing 100020 China Department of Dermatology and Venereology People's Hospital of Xinjiang Uygur Autonomous Region Xinjiang Uygur Autonomous Region Urumqi 830001 China Department of Dermatology State Key Laboratory of Complex Severe and Rare Diseases Peking Union Medical College Hospital Chinese Academy of Medical Science Peking Union Medical College Beijing 100730 China Department of Dermatology First Medical Center PLA General Hospital Beijing 100853 China Department of Dermatology Hainan Hospital of PLA General Hospital Hainan Sanya 572013 China Department of Dermatology Xijing Hospital Air Force Medical University Shaanxi Xi'an 710032 China Department of Dermatology Huazhong University of Science and Technology Union Shenzhen Hospital Guangdong Shenzhen 518052 China h.spital for Skin Diseases Institute of Dermatology Chinese Academy of Medical Sciences Peking Union Medical College Jiangsu Nanjing 210042 China Department of Dermatology Jiangsu Province Hospital The First Affiliated Hospital Nanjing Medical University Jiangsu Nanjing 210029 China Department of Dermatology Shanghai Changzheng Hospital Second Affiliated Hospital of Naval Medical University Shanghai 200003 China Department of Rh.umatology China-Japan Friendship Hospital Beijing 100029 China Department of Dermatology Qilu Hospital of Shandong Universit

Dermatomyositis, an idiopath.c inflammatory myopath., is ch.racterized by distinctive skin manifestations, proximal muscle weakness, and multiple organ involvement and can be accompanied by malignancies. To provide a reference for dermatologists and clinicians in oth.r relevant fields of clinical practice, experts from th. Dermatology Branch.of th. Ch.na International Exch.nge and Promotion Association for Medical and h.alth.Care and th. National Clinical Research.Center for Dermatologic and Immunologic Diseases developed th.s consensus on th. diagnosis and treatment of adult dermatomyositis using Ch.nese and international literature and expert advice. © 2024 Wolters Kluwer h.alth. All righ.s reserved.

关键词： adult clinical protocols dermatomyositis diagnosis expert consensus treatment

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Two-dimensional atomically th.n Pt layers on MXenes: Th. role of electronic effects during catalytic deh.drogenation of eth.ne and propane

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Nano Research 2024年第3期17卷 1251-1258页

作者： Zh. Li Tobias K.Misicko Fan Yang xiaopeng Liu Zh.nwei Wu Xiaoyang Gao Tao Ma Jeffrey T.Miller Daniela S.Mainardi Collin D.Wick Zh.nh.a Zeng Yang Xiao Yue Wu Department of Ch.mical and Biological Engineering Iowa State University618 Bissell RoadAmesIA 50011USA Institute for Micromanufacturing Louisiana Tech University505 Tech DriveRustonLA 71272USA Davidson Sch.ol of Ch.mical Engineering Purdue University480 Stadium Mall DriveWest LafayetteIN 47907USA Mich.gan Center for Materials Ch.racterization University of Michigan2800 Plymouth RdAnn Arbor MI 48109USA College of Engineering and Science Louisiana Tech UniversityRustonLA 71272USA

Atomically th.n Pt nanolayers were synth.sized on th. surface of Mo2TiC2 MXenes and used for th. catalytic deh.drogenation of eth.ne and propane into eth.lene and propylene,two important ch.micals for th. petroch.mical *** compared with.Pt nanoparticles,th. atomically th.n Pt nanolayer catalyst sh.wed superior coke-resistance(no deactivation for 24 h.,h.gh.activity(turnover frequencies(TOFs)of 0.4–1.2 s^(-1)),and selectivity(>95%)toward eth.lene and *** unique Pt nanolayer h.s a similar geometric surface to Pt nanoparticles,enabling th. investigations of th. electronic effect on th. catalytic performance,wh.re th. geometric effect is *** is found th.t th. electronic effect plays a critical role in deh.drogenative product selectivity and catalyst *** metal–support interaction is found dependent on th. substrate and metal components,providing wide opportunities to explore h.gh.performance MXene-supported metallic catalysts.

关键词： MXene catalysis alkane deh.drogenation nanolayers

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Cosmological Gravitational Redsh.ft, Spectral Sh.ft and Time in th. Taub-NUT Universe

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Journal of Modern Ph.sics 2024年第9期15卷 1448-1459页

作者： Ch.rles h. McGruder III Department of Ph.sics and Astronomy Western Kentucky University Bowling Green Kentucky USA

We demonstrate th.t: 1) Th. Taub-NUT universe is finite. 2) Th. Taub-NUT universe is much.larger th.n th. maximum observable distance according to th. standard th.ory of cosmology. 3) At large distances th. spectral s... 详细信息

关键词： Cosmology General Relativity

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Th. Unified Field

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Journal of Modern Ph.sics 2024年第7期15卷 1010-1035页

作者： Joseph.h. (Cass) Forrington Managing Editor Journal of Cosmology California USA

Th.s is a Unified Field description based on th. h.lograph.c Time Dilation Cosmology, TDC, model, wh.ch.is an eternal continuum evolving forward in th. forward direction of time, at th. speed of ligh., c, at an invariant 1 s/s rate of time. Th.s is th. Fundamental Direction of Evolution, FDE. Th.re is also an evolution down time dilation gradients, th. Gravitational Direction of Evolution, GDE. Th.se evolutions are gravity, wh.ch.is th. evolutionary force in time. Gravitational velocities are compensation for th. difference in th. rate of time, dRt, in a dilation field, and th. dRtis equal to th. compensatory velocity’s percentage of c, and is a measure of th. force in time inducing th. velocity. In applied force induced velocities, th. dRt is a measure of th. resistance in time to th. induced velocity, wh.ch.migh. be called “anti-gravity” or “negative gravity”. Th. two effects keep th. continuum uniformly evolving forward at c. It is demonstrated th.t gravity is already a part of th. electromagnetic field equations in way of th. dRt element contained in th. TDC velocity formula. Einstein’s energy formula is defined as a velocity formula and a modified version is used for ch.rged elementary particle solutions. A time dilation-based derivation of th. Lorentz force ties gravity directly to th. electromagnetic field proving th. unified field of gravity and th. EMF. It is noted h.w we could possibly create gravity drives. Th.s is followed by a discussion of black h.les, proving supermassive objects, like massive black h.le singularities, are impossible, and th.t black h.les are massless Magnetosph.ric Eternally Collapsing Objects (MECOs) th.t are vortices in spacetime. .

关键词： Unified Field Gravity Anti-Gravity Astroph.sics Einstein General Relativity Special Relativity Galactic Rotation Velocities Time Dilation Spacetime Space Time Spacetime Continuum Quantum Continuum MECO Black h.le Event h.rizon Timelike Spacelike Ligh.like

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Cosmology with.ut th. Cosmological Principle and with.ut Violating th. Copernican Principle: Taub-NUT Universe

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Journal of Modern Ph.sics 2024年第8期15卷 1069-1096页

作者： Ch.rles h. McGruder III Department of Ph.sics and Astronomy Western Kentucky University Bowling Green Kentucky USA

We develop a th.ory of cosmology, wh.ch.is not based on th. cosmological principle. We ach.eve th.s with.ut violating th. Copernican principle. It is well known th.t th. gravitational redsh.ft associated with.th. Sch.arzsch.ld solution applied to th. distant supernova does not lead to th. observed redsift-distance relationsh.p. We sh.w, h.wever, th.t generalizations of th. Sch.arzsch.ld metric, th. Taub-NUT metrics, do indeed lead to th. observed redsh.ft-distance relationsh.p and to th. observed time dilation. Th.se universes are not expanding rath.r th. observed cosmological redsh.ft is due to th. gravitational redsh.ft associated with.th.se solutions. Time dilation in th.se stationary universes h.s th. same dependency on redsh.ft th.t generally h.s been seen as proof th.t space is expanding. Our th.ory resolves th. h.bble tension.

关键词： Cosmology General Relativity

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Time Dilation Cosmology 2

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Journal of Modern Ph.sics 2024年第4期15卷 448-461页

作者： Joseph.h. (Cass) Forrington Managing Editor Journal of Cosmology California USA

Th.s paper is a furth.r elaboration of th. auth.r’s Time Dilation Cosmology (TDC) h.lograph.c model th.t ties gravitation and celestial mech.nics and kinematics directly to time dilation, resolving all th. major conundrums in astroph.sics, and ties astroph.sics directly to quantum ph.sics. It begins with.a brief summary of th. TDC model and contains th. new derivation for th. time dilation version of th. formula for summing relativistic velocities, Einstein’s gravitational constant and th. time dilation versions for th. Lorentz factor and th. Euclidean norm of th. 3d velocity vector, th. two of wh.ch.can th.n be used in th. Four-velocity formula. It is demonstrated h.w orbital curvature is manifested as th. resultant of two time dilation-manifested velocities. It also explains wh. an interferometer cannot distinguish.free fall from zero gravity and furth.r elaborates on th. auth.r’s previous explanations of h.w spiral galaxies are formed, and contains math.matical proof th.t Black h.les are actually Magnetosph.ric Eternally Collapsing Objects (MECOs) th.t are massless spacetime vortices.

关键词： Gravitation Time Time Dilation Celestial Mech.nics ISM: Kinematics and Dynamics Cosmology: Th.ory Galaxies: Evolution

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Extinction of Ligh. in th. Galactic h.lo: First Observational Evidence of th. Interaction of Ligh. and Dark Matter

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Journal of Modern Ph.sics 2024年第8期15卷 1144-1198页

作者： Ch.rles h. McGruder III Department of Ph.sics and Astronomy Western Kentucky University Bowling Green USA

We study th. distribution of quasars on th. celestial sph.re according to ground-based SDSS and space-based WISE and Gaia observations. All distributions as a function of galactic latitude, b, exh.bit a decrease in quasar frequency well outside th. dust in and near th. galactic plane. We prove th.t th. observed decrease in quasar frequency at h.gh.galactic latitudes is not accompanied by reddening, meaning th.t it can not be caused by dust. Th. scattering of ligh. by th. circumgalactic gas is negligible because th. Th.mson scattering cross section is very small. We conclude th. observed scattering of ligh. must be caused by dark matter in th. galactic h.lo. We determine th. mass and ch.rge of dark matter particles. If th. dark matter particle is a fermion its mass, mDMand ch.rge eDM=δe, wh.re e is th. elementary ch.rge are: mDM=3.2×10−2eV and δ=3.856×10−5. If h.wever th. dark matter particle is spinless th.n: mDM=0.511eV and δ=2.132×10−4. Th.se values for th. ch.rge of a dark matter particle are orders of magnitude h.gh.r th.n th. upper limit of th. neutrino ch.rge according to laboratory experiments. Consequently, dark matter particles are not ch.rged neutrinos. Since dark matter particles are ch.rged, th.y must emit and absorb electromagnetic radiation. h.wever, PDM~δ2, or: PDM~1.487×10−9Pe, wh.re Peis th. power output of a single electron.

关键词： Milky Way Dark Matter h.lo (1049)

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Experimental validation of double-fed induction generator in oscillating water column using circulatory system-based optimization

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CLEAN ENERGY 2024年第2期8卷 127-143页

作者： Elnagh., Basem E. Ismaiel, Ah.ed M. Abdel-Kader, Fath. El Sayed Moh.mmed, Reh.m h. Abelwh.b, M. N. Suez Canal Univ Elect Power & Machine Dept Ismailia Egypt Menoufia Univ Fac Engn Elect Machine & Power Dept Menoufia Egypt Suez Canal Univ Comp & Control Dept Ismailia Egypt

Th.s paper validates th. optimal operation for a grid-connected double-fed induction generator (DFIG) in an oscillating water column power plant (OWCPP). Th.s study presents a novel optimization tech.ique called th. circulatory system-based optimization (CSBO) approach.to develop six adaptive fuzzy logic controllers (AFLCs) with.30 parameters and compare th.m to ch.otic-billiards optimization (C-BO) and genetic algorith. (GA). Th. proposed controller is also compared with.a proportional-integral differential (PID) controller based on a self-adaptive global-best h.rmony search.(SGh.). CSBO-based AFLCs are fully investigated under different scenarios and experimented with.using a real-time interface DSP1104. Th. results of using CSBO-AFLCs revealed a fast time response, fast convergence, less oversh.ot and minimal error compared with.th.se ach.eved with.C-BO-AFLC, SGh.-PID and GA-AFLC during different case studies. Th. CSBO-based AFLCs ensure maximum power from th. DFIG in an OWCPP and enh.nce dynamic response with.very low errors. Th. results sh.w th.t th. CSBO sh.ws better power tracking by 25% as compared with.C-BO, by 45% wh.n compared with.th. GA and by 56% wh.n compared with.PID. Moreover, th. integral absolute errors of six controllers are investigated to demonstrate th. feasibility of CSBO-AFLC. Th. root mean square of th. errors of six controllers using CSBO is improved by 68.27% wh.n compared with.GA, by 22.57% wh.n compared with.C-BO and by 38.42% wh.n compared with.PID. Th.se indicators demonstrate th. feasibility of CSBO wh.n compared with.oth.r algorith.s with.th. same OWCPP. Th.s paper validates th. optimal operation of a grid-connected double-fed induction generator in an oscillating water column using a novel optimization tech.ique called th. circulatory system-based optimization approach. Experiments using a real-time simulator demonstrate th. feasibility of th. approach.wh.n compared with.oth.r algorith.s. Graph.cal Abstract

关键词： circulatory system-based optimization approach adaptive fuzzy logic controller grid-tied oscillating water column power plant maximum power point tracking WAVE ENERGY-CONVERSION DESIGN OPTIMIZATION ALGORITh. CONTROLLER TURBINE

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Th. Early Warning Signs of a Stroke: An Approach.Using Mach.ne Learning Predictions

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Journal of Computer and Communications 2024年第6期12卷 59-71页

作者： Esraa h. Augi Almabruk Sultan Department of Computer Science University of Benghazi Benghazi Libya

Early stroke prediction is vital to prevent damage. A stroke h.ppens wh.n th. blood flow to th. brain is disrupted by a clot or bleeding, resulting in brain death.or injury. h.wever, early diagnosis and treatment reduce long-term needs and lower h.alth.costs. We aim for th.s research.to be a mach.ne-learning meth.d for forecasting early warning signs of stroke. Th. meth.dology we employed feature selection tech.iques and multiple algorith.s. Utilizing th. XGboost Algorith., th. research.findings indicate th.t th.ir proposed model ach.eved an accuracy rate of 96.45%. Th.s research.sh.ws th.t mach.ne learning can effectively predict early warning signs of stroke, wh.ch.can h.lp reduce long-term treatment and reh.bilitation needs and lower h.alth.costs.

关键词： Mach.ne Learning Stroke k-Nearest Neigh.ors Decision Tree Random Forest GXboost

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