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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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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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DFT investigation of h.lf-metallic ferromagnetic rare earth.based spinels Mgh._(2)Z_(4)(Z=S,Se)

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Journal of Rare Earth. 2024年第1期42卷 121-128,I0005页

作者： Maiza Zanib Mumtaz Manzoor N.A.Noor M.Waqas Iqbal Mazia Asgh.r h.h.h.gazy A.Laref Department of Ph.sics Riphah International UniversityLahore CampusPakistan Research.Centre for Advanced Materials Science King Khalid UniversityP.O.Box 9004AbhaSaudi Arabia Department of Ph.sics Faculty of ScienceKing Khalid UniversityP.O.Box 9004AbhaSaudi Arabia Department of Ph.sics and Astronomy College of ScienceKing Saud UniversityRiyadh11451Saudi Arabia

h.lf-metallic ferromagnetism,mech.nical as well as th.rmoelectric properties for rare earth.based spinels Mgh._(2)Z_(4)(Z=S,Se)were investigated using density functional th.ory(DFT).Structural optimization was done with.Perdew-Burke-Eh.enzorf(PBE)sol-generalized gradient approximation(GGA)to calculate th. lattice constant of both.spinels comparable to experimental *** addition,Born stability criteria and negative formation energy sh.w th.t our studied spinels are also structurally and dynamically stable in th. cubic *** ferromagnetic(FM)state stability,we also calculated th. energy differences among FM,antiferromagnetic(AFM),and non-magnetic(NM)***,Curie temperatures of ferromagnetic ph.ses were also *** used Trans-Blah. improved BeckeJoh.son(TB-mBJ)potential functional for electronics as well as magnetic ch.racteristics,wh.ch.lead to th. consistent explanation of h.lf-metallic ferromagnetism,representing th. wh.le band-occupancy in material with.exact detail of density of states(DOS).Th. stable FM state was examined in spinels due to th. exch.nge splitting of h. cation consisting of p-d h.bridizations compatible with.th. result ach.eved for electronics band structure and ***,spin magnetic moment was explained in terms of anion,cation,and sh.ring ch.rge on studied *** addition,th. calculated th.rmoelectric properties clearly sh.w th.t operation range of th.se systems may be utilized by future experimental works for identifying th. potential applications of th.se systems.

关键词： h.-based spinels DFT simulations Mech.nical parameters Electronic properties h. ferromagnetism Figure of merit

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Linear OPF-based Robust Dynamic Operating Envelopes with.Uncertainties in Unbalanced Distribution Networks

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Journal of Modern Power Systems and Clean Energy 2024年第4期12卷 1320-1326页

作者： Bin Liu Julio h.Braslavsky Nariman Mah.avi Energy Centre Commonwealth Scientific and Industrial Research Organisation(CSIRO)Newcastle 2300Australia th. Network Planning Division TransgridSydney 2000Australia th. Energy Systems Program Energy CentreCommonwealth Scientific and Industrial Research Organisation(CSIRO)Newcastle 2300Australia

Dynamic operating envelopes(DOEs),as key enablers to facilitate distributed energy resource(DER)integration,h.ve attracted increasing attention in th. past ***,uncertainties,wh.ch.may come from load forecasting errors or inaccurate network parameters,h.ve been rarely discussed in DOE calculation,leading to compromised quality of th. h.sting capacity allocation *** letter studies h.w to calculate DOEs th.t are immune to such.uncertainties based on a linearised unbalanced th.ee-ph.se optimal power flow(UTOPF)*** uncertain parameters constrained by norm balls,formulations for calculating robust DOEs(RDOEs)are presented along with.discussions on th.ir *** cases,including a 2-bus illustrative network and a representative Australian network,are tested to demonstrate th. effectiveness and efficiency of th. proposed approach.

关键词： Distributed energy resource(DER) dynamic operating envelope(DOE) feasible region robust optimisation uncertainty modelling unbalanced optimal power flow

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Rational design of AgGaS/ZnS/ZnS quantum dots with.a near-unity ph.toluminescence quantum yield via double sh.lling sch.me

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Journal of Materials Science & Tech.ology 2024年第2期169卷 235-242页

作者： h.X.Lu h.Liu Z.Z.Fu Y.Y.Ch.n h.Q.Dai Z.h. W.L.Zh.ng R.Q.Guo Institute for Electric Ligh. Sources School of Information Science and TechnologyFudan UniversityShanghai 200433China Institute of Future Ligh.ing Academy for Engineering and TechnologyFudan UniversityShanghai 200433China Yiwu Research.Institute of Fudan University YiwuZhejiang 322000China Zh.ngsh.n-Fudan Joint Innovation Center Zhongshan 528437China

In th.s study,a two-step meth.d was used to synth.size h.gh.y luminescent AgGaS/ZnS/ZnS quantum dots(QDs).In th. first step,an inner ZnS sh.ll was formed via a one-pot meth.d,wh.ch.resulted in a smaller lattice mismatch.between th. AgGaS core and th. outer ZnS sh.ll,th.reby facilitating th. formation of a th.ck outer *** th. two-step sh.lling process,th. synth.sized AgGaS/ZnS/ZnS QDs sh.wed an excellent ph.toluminescence quantum yield(PLQY)of 96.4%with.a peak wavelength.of 508 nm,repre-senting th. h.gh.st PLQY reported th.s far for AgGaS ***,th. effect of h.logen ions in Zn precursors on th. sh.lling process was *** was proposed th.t th. capacity of h.logen ions to coordinate with.th. QDs influenced th. balance between Zn cation diffusion and ZnS sh.lling ***,th. ZnS sh.lling reaction was dominant wh.n ZnCl_(2)was employed,wh.le Zn cation diffusion was th. dominant process under th. I^(−)-rich.*** work provides insigh.s into th. interfacial restructuring during th. ZnS sh.lling and offers a clear map for th. tailored synth.sis of core/sh.ll QDs.

关键词： AgGaS Quantum dots Ph.toluminescence Core/sh.ll Alloyed core/sh.ll interface

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CT Th.esh.lds for Spinal Bone Mineral Attenuation to Prioritize Eligible Older Women for Osteoporosis Screening

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Open Journal of Radiology 2024年第2期14卷 92-101页

作者： Seo Yeon K. Orite Bryn h.guch. h.o-Ch.n Yoon Lana h. Gimber St. Elizabeth. Medical Center Brighton MA USA University of California Irvine CA USA Kaiser Permanente Division of Research Oakland CA USA Department of Diagnostic Imaging Hawaii Permanente Medical Group Honolulu HI USA

Introduction: Computed tomograph. (CT) measurements of bone mineral attenuation may be a useful means to identify older women wh. sh.uld be prioritized for bone mineral density screening. Meth.ds: We compared bone mineral attenuation as measured in th. L1 vertebra of CT studies to th. results of dual-energy x-ray absorptiometry (DEXA) studies to determine wh.t CT attenuation th.esh.lds migh. yield a reasonable combination of sensitivity and specificity for th. detection of osteoporosis. Th. study was limited to women between th. ages of 65 and 75 years wh. h.d a DEXA study and a CT th.t included th. L1 or adjacent vertebra performed with.n 3 years of th. DEXA study. Results: Th.re were 1226 women in th.s study, of wh.m 452 (38%) h.d osteoporosis based on a T-score ≤ −2.5 by DEXA. Th.re were 830 CT studies performed with.contrast and 396 studies wh.ch.were performed with.ut contrast. Th.re was a statistically significant difference in th. mean h. of th.se studies performed with.ut contrast compared to th.se with.contrast (unenh.nced mean 103 h. versus 125 h., p h.esh.lds provided th. most appropriate combination of sensitivity and specificity for th. detection of osteoporosis wh.n comparing CT studies performed with.ut or with.IV contrast and wh.n all th. CT data were used in aggregate. Conclusion: Different th.esh.lds appear necessary wh.n using th. mean CT vertebral attenuation to identify older women for preferential referral for DEXA studies.

关键词： Osteoporosis Bone Mineral Attenuation CT Th.esh.ld

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An Improved Binary Quantum-based Avian Navigation Optimizer Algorith. to Select Effective Feature Subset from Medical Data:A COVID-19 Case Study

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Journal of Bionic Engineering 2024年第1期21卷 426-446页

作者： Ali Fatah. Moh.mmad h.Nadimi-Sh.h.aki h.da Zamani Faculty of Computer Engineering Najafabad BranchIslamic Azad UniversityNajafabad ***Iran Big Data Research.Center Najafabad BranchIslamic Azad UniversityNajafabad ***Iran

Feature Subset Selection(FSS)is an NP-h.rd problem to remove redundant and irrelevant features particularly from medical data,and it can be effectively addressed by metah.uristic ***,existing binary versions of metah.uristic algorith.s h.ve issues with.convergence and lack an effective binarization meth.d,resulting in suboptimal solutions th.t h.nder diagnosis and prediction *** paper aims to propose an Improved Binary Quantum-based Avian Navigation Optimizer Algorith.(IBQANA)for FSS in medical data preprocessing to address th. suboptimal solutions arising from binary versions of metah.uristic *** proposed IBQANA’s contributions include th. h.brid Binary Operator(h.O)and th. Distance-based Binary Search.Strategy(DBSS).h.O is designed to convert continuous values into binary solutions,even for values outside th.[0,1]range,ensuring accurate binary *** th. oth.r h.nd,DBSS is a two-ph.se search.strategy th.t enh.nces th. performance of inferior search.agents and accelerates *** combining exploration and exploitation ph.ses based on an adaptive probability function,DBSS effectively avoids local *** effectiveness of applying h.O is compared with.five transfer function families and th.esh.lding on 12 medical datasets,with.feature numbers ranging from 8 to 10,***'s effectiveness is evaluated regarding th. accuracy,fitness,and selected features and compared with.seven binary metah.uristic ***,IBQANA is utilized to detect *** results reveal th.t th. proposed IBQANA outperforms all comparative algorith.s on COVID-19 and 11 oth.r medical *** proposed meth.d presents a promising solution to th. FSS problem in medical data preprocessing.

关键词： Feature subset selection Optimization Binary metah.uristic algorith.s Bioinspired Mach.ne learning Medical datasets

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Influence of Confined Concrete Models on th. Seismic Response of RC Frames

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Structural Durability & h.alth.Monitoring 2024年第3期18卷 197-222页

作者： h.seyin Bilgin Bredli Plaku Department of Civil Engineering EPOKA UniversityTirana1039Albania

In th.s study, th. influence of confined concrete models on th. response of reinforced concrete structures is investigatedat member and global system levels. Th. commonly encountered concrete models such.as Modified Kent-Park, Saatçioğlu-Razvi, and Mander are considered. Two moment-resisting frames designed according to th.pre-modern code are taken into consideration to reflect th. example of an RC moment-resisting frame in th.current building stock. Th. building is in an earth.uake-prone zone located on Z3 Soil Type. Th. inelasticresponse of th. building frame is modelled by considering th. plastic h.nges formed on each.beam and columnelement for different concrete classes and stirrups spacings. Th. models are subjected to non-linear static *** differences between confined concrete models are comparatively investigated at both.reinforced concretemember and system levels. Based on th. results of th. comparative analysis, it is revealed th.t th. column beh.viouris mostly influenced by th. ch.ice of model, due to axial loads and confinement effects, wh.le th. beams areless affected, and also it is observed th.t th. differences exh.bited in th. moment-curvature response of columncross-sections do not significantly affect th. overall beh.viour of th. global system. Th.s h.gh.igh.s th. critical roleof model selection relative to th. concrete strength.and stirrup spacing of th. member.

关键词： Non-linear static analysis moment-curvature relationsh.ps plastic h.nges concrete confinement models seismic action

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