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microstructure evolution and sh.pe memory beh.viors of Ni_(47)Ti_(44)Nb_(9)alloy subjected to multistep th.rmomech.nical loading with.different prestrain levels

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Journal of materials Science & Tech.ology 2024年第4期171卷 80-93页

作者： Y.h.Zh.ng h.Li Z.W.Yang X.Liu Q.F.Gu State Key Laboratory of Solidification Processing School of Materials Science and EngineeringNorthwestern Polytechnical UniversityXi’an 710072China Sh.anxi Key Laboratory of h.gh.Performance Precision Forming Tech.ology and Equipment Northwestern Polytechnical UniversityXi’an 710072China

Ni_(47)Ti_(44)Nb_(9)sh.pe memory alloy(SmA)is a promising material in th. aerospace field due to its wide transformation *** application of sh.pe memory effect depends on multistep th.rmomech.n-ical loading,viz.,low-temperature deformation and subsequent h.ating to ***-temperature deformation prestrain plays a pivotal role in sh.pe memory properties tailoring of SmA ***,microstructure evolution and deformation mech.nisms of Ni_(47)Ti_(44)Nb_(9)SmA subjected to vari-ous prestrain levels are still *** th.s end,microstructure evolution and sh.pe memory beh.viors of Ni_(47)Ti_(44)Nb_(9)alloy subjected to multistep th.rmomech.nical loading with.prestrain levels of 8%-16%at-28℃(m_(s)+30℃)were *** results demonstrate th.t th. stress-strain curve of th. specimen exh.bits four distinct stages at a maximal prestrain of 16%.Wh.reas stageⅡand stageⅢend at prestrains of∼8%and∼12%,*** stageⅡ,th. stress-induced martensitic transformation is accompanied by th. dislocation slip of th. NiTi matrix andβ-Nb *** stageⅢ,in addition to th. h.gh.r density of dislocations and furth.r growth.of stress-induced martensite variants(SImVs),(001)compound twins are introduced as a result of th.(001)deformation twinning in stress-induced ***{20-1}martensite twins are gradually introduced in stageⅣ.Correspondingly,after subsequent unloading and h.ating,a h.gh.r density of{114}austenite twins form in th. specimen with.a larger prestrain of 16%.With.increasing prestrain from 8%to 16%,th. recoverable strainε_(re)^(T)upon h.ating increases first and th.n ***ε_(re)^(T)obtains a maximum of 7.03%at 10%prestrain and de-creases to 6.17%at 16%*** increase ofε_(re)^(T)can be attributed to th. formation of new SImVs,th. furth.r growth.of existing SImVs,and th. recoverable(001)compound *** th. decrease ofε_(re)^(T)is mainly associated with.th. irrecoverable strain by{20−1}martensite *** effe

关键词： Ni_(47)Ti_(44)Nb_(9)sh.pe memory alloy Wide transformation h.steresis Th.rmomech.nical loading microstructure evolution Sh.pe memory beh.viors Stress-induced martensitic transformation Deformation twinning

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A Compreh.nsive Review on Ch.rging Topologies and Power Electronic Converter Solutions for Electric Veh.cles

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Journal of modern Power Systems and Clean Energy 2024年第3期12卷 675-694页

作者： Abdelfatah.Ali h.ssam h.h.mousa mostafa F.Sh.aban mah.r A.Azzouz Ah.ed S.A.Awad th. Department of Electrical Engineering American University of Sharjah26666 SharjahUnited Arab Emirates th. Department of Electrical Engineering South Valley University83523 QenaEgypt th. Department of Electrical and Computer Engineering University of WindsorWindsorON N9B 3P4 Canada Electrical Engineering Department Qatar UniversityDoha 2713Qatar Department of Electrical and Computer Engineering Sultan Qaboos UniversityMuscat123Oman

Electric veh.cles(EVs)are becoming more popular worldwide due to environmental concerns,fuel security,and price *** performance of EVs relies on th. energy stored in th.ir batteries,wh.ch.can be ch.rged using eith.r AC(slow)or DC(fast)***,EVs can also be used as mobile power storage devices using veh.cle-to-grid(V2G)*** electronic converters(PECs)h.ve a constructive role in EV applications,both.in ch.rging EVs and in ***,th.s paper compreh.nsively investigates th. state of th. art of EV ch.rging topologies and PEC solutions for EV *** examines PECs from th. point of view of th.ir classifications,configurations,control approach.s,and future research.prospects and th.ir impacts on power *** can be classified into various topologies:DC-DC converters,AC-DC converters,DC-AC converters,and AC-AC *** address th. limitations of traditional DC-DC converters such.as switch.ng losses,size,and h.gh.electromagnetic interference(EmI),resonant converters and multiport converters are being used in h.gh.voltage EV ***,power-train converters h.ve been modified for h.gh.efficiency and reliability in EV *** paper offers an overview of ch.rging topologies,PECs,ch.llenges with.solutions,and future trends in th. field of th. EV ch.rging station applications.

关键词： Ch.rging station ch.rging topology electric veh.cle power electronic converter veh.cle-to-grid

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Genomic mosaicism of th. Brain:Origin,Impact,and Utility

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Neuroscience Bulletin 2024年第6期40卷 759-776页

作者： Jared h.Grah.m Joh.nnes C.m.Sch.ach.tzki Xiaoxu Yang martin W.Breuss Department of Pediatrics Section of Clinical Genetics and MetabolismUniversity of Colorado School of MedicineAurora80045-2581COUSA Department of Cellular and molecular medicine University of California San DiegoLa Jolla92093-0021San DiegoCAUSA Department of Neurosciences University of California San DiegoLa Jolla92093-0021San DiegoCAUSA Rady Ch.ldren’s Institute for Genomic medicine San Diego92123CAUSA

Genomic mosaicism describes th. ph.nomenon wh.re some but not all cells with.n a tissue h.rbor unique genetic ***,research.focused on th. impact of genomic mosaicism on clinical ph.notype—motivated by its involvement in cancers and overgrowth.*** recently,we increasingly sh.fted towards th. pleth.ra of neutral mosaic variants th.t can act as recorders of cellular lineage and environmental ***,we summarize th. current state of th. field of genomic mosaicism research.with.a special emph.sis on our current understanding of th.s ph.nomenon in brain development and *** th. field of genomic mosaicism h.s a rich.h.story,tech.ological advances in th. last decade h.ve ch.nged our approach.s and greatly improved our *** will provide current definitions and an overview of contemporary detection approach.s for genomic ***,we will discuss th. impact and utility of genomic mosaicism.

关键词： Genomics Brain development Brain h.meostasis Genomic mosaicism

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Optimizing Average Electric Power During th. Ch.rging of Lith.um-Ion Batteries Th.ough.th. Taguch. meth.d

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Transactions of Tianjin University 2024年第2期30卷 152-166页

作者： moh. h.S.Alrash.an Department of Electrical Engineering Al-Hussein Bin Talal UniversityMaan 71110Jordan

In recent times, lith.um-ion batteries h.ve been widely used owing to th.ir h.gh.energy density, extended cycle lifespan, and minimal self-disch.rge rate. Th. design of h.gh.speed rech.rgeable lith.um-ion batteries faces a significant ch.llenge owing to th. need to increase average electric power during ch.rging. Th.s ch.llenge results from th. direct influence of th. power level on th. rate of ch.mical reactions occurring in th. battery electrodes. In th.s study, th. Taguch. optimization meth.d was used to enh.nce th. average electric power during th. ch.rging process of lith.um-ion batteries. Th. Taguch. tech.ique is a statistical strategy th.t facilitates th. systematic and efficient evaluation of numerous experimental variables. Th. proposed meth.d involved varying seven input factors, including positive electrode th.ckness, positive electrode material, positive electrode active material volume fraction, negative electrode active material volume fraction, separator th.ckness, positive current collector th.ckness, and negative current collector th.ckness. Th.ee levels were assigned to each.control factor to identify th. optimal conditions and maximize th. average electric power during ch.rging. moreover, a variance assessment analysis was conducted to validate th. results obtained from th. Taguch. analysis. Th. results revealed th.t th. Taguch. meth.d was an eff ective approach.for optimizing th. average electric power during th. ch.rging of lith.um-ion batteries. Th.s indicates th.t th. positive electrode material, followed by th. separator th.ckness and th. negative electrode active material volume fraction, was key factors significantly infl uencing th. average electric power during th. ch.rging of lith.um-ion batteries response. Th. identification of optimal conditions resulted in th. improved performance of lith.um-ion batteries, extending th.ir potential in various applications. Particularly, lith.um-ion batteries with.average electric power of 16 W and 17

关键词： Lith.um-ion batteries Average electric power during ch.rging Taguch. meth.d COmSOL multiph.sics software C rate L27 orth.gonal array

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Prospect Th.ory Based Individual Irrationality modelling and Beh.vior Inducement in Pandemic Control

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Computer modeling in Engineering & Sciences 2024年第7期140卷 139-170页

作者： Wenxiang Dong h.Vicky Zh.o Department of Automation BNRistTsinghua UniversityBeijing100084China

Understanding and modeling individuals’beh.viors during epidemics is crucial for effective epidemic ***,existing research.ignores th. impact of users’irrationality on decision-making in th. ***,existing disease control meth.ds often assume users’full compliance with.measures like mandatory isolation,wh.ch.does not align with.th. actual *** address th.se issues,th.s paper proposes a prospect th.orybased framework to model users’decision-making process in epidemics and analyzes h.w irrationality affects individuals’beh.viors and epidemic *** to th. analysis results,irrationality tends to prompt conservative beh.viors wh.n th. infection risk is low but encourages risk-seeking beh.viors wh.n th. risk is ***,th.s paper proposes a beh.vior inducement algorith. to guide individuals’beh.viors and control th. spread of *** and real user tests validate our analysis,and simulation results sh.w th.t th. proposed beh.vior inducement algorith. can effectively guide individuals’beh.vior.

关键词： Disease spread beh.vior model irrationality prospect th.ory

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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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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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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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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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