检索结果-南通市图书馆

Ch.nes. Journal of Electrical Engineering 2024年第1期10卷 1-2页

作者： Li J. Mei h. Li s. Tianjin Univers.ty China Ts.ngh.a s.enzh.n International Graduate s.h.ol China Lanzh.u Jiaotong Univers.ty China

Th. rapid development of clean and renewable energy tech.ologies.repres.nted by wind and s.lar energy,as.well as.th. continuous.growth.of load demand,h.ve put forward h.gh.r requirements.for th. s.fe operation of th. power *** performance of power equipment bas.d on traditional dielectric materials.is.often limited by various.defects.generated during molding,trans.ortation,as.embly,and operation,wh.ch.cannot meet th. reliability requirements.of power s.s.ems.in th. new *** detection is.an es.ential tech.ical meth.d in indus.rial development,wh.ch.can detect and evaluate th. defect and damage s.atus.of in-s.rvice equipment,key components.and materials.with.ut damaging th. object.

关键词： s.rvice Application operation

On h.pers.rfaces.of h.×h.

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

s.ience Ch.na Math.matics 2024年第2期67卷 339-366页

作者： Dong Gao h.i Ma Zeke yao s.h.ol of s.ience Beijing University of Civil Engineering and Architecture Department of Math.matical s.iences Tsinghua University

In th.s.paper, we s.udy h.pers.rfaces.of h.× h.. We firs. clas.ify th. h.pers.rfaces.with.cons.ant principal curvatures.and cons.ant product angle functions. Th.n we clas.ify h.mogeneous.h.pers.rfaces.and is.parametric h.pers.rfaces. res.ectively. Finally, we clas.ify th. h.pers.rfaces.with.at mos. two dis.inct cons.ant principal curvatures. as.well as.th.s. with.th.ee dis.inct cons.ant principal curvatures.under s.me additional conditions.

关键词： cons.ant principal curvature h.mogeneous.h.pers.rface is.parametric h.pers.rface 53C42 53B25 53C40

s.nergis.ic s.lver-mediated and palladium-catalyzed nondirected olefination of aryl C–h.bond: quick acces. to multi-s.bs.ituted aryl olefins

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

s.ience Ch.na Ch.mis.ry 2024年第3期67卷 882-889页

作者： Jian yao Lili s.ao Xiaoh.ng h.o Xiaoming Wang s.angh.i Key Laboratory for Molecular Engineering of Ch.ral Drugs Frontiers Science Center for Transformative MoleculesSchool of Chemistry and Chemical EngineeringShanghai Jiao Tong UniversityShanghai 200240China s.ate Key Laboratory of Organometallic Ch.mis.ry Center for Excellence in Molecular SynthesisShanghai Institute of Organic ChemistryChinese Academy of SciencesShanghai 20032China s.h.ol of Ch.mis.ry and Materials.s.ience Hangzhou Institute for Advanced StudyUniversity of Chinese Academy of SciencesHangzhou 310024China

Trans.tion metal-catalyzed olefination of aryl C-h.bond is.a powerful tool for th. s.nth.s.s.of alkenes. Wh.le th. Pd-catalyzed oxidative C-h.olefination of arenes. als. known as.Fujiwara-Moritani reaction, h.s.been es.ablis.ed as.one of th. mos. efficient meth.ds. th. s.bs.rates.are largely limited to terminal olefins.with.electron-with.rawing group(s.. h.rein, we report a s.nergis.ic s.lver-mediated and palladium-catalyzed non-directed C-h.olefination of arenes.with.vinyl(ps.udo)h.lides. wh.ch.offers.a complementary s.rategy to th. typical Fujiwara-Moritani reaction. Th. reactions.proceeded well for a variety of h.logenated arenes. h.teroarenes. and olefin s.bs.rates. providing an efficient acces. to various.multi-s.bs.ituted aryl olefins. including tris.bs.ituted/tetras.bs.ituted olefins.and s.veral complex olefins.derived from medicines.or natural products. Mech.nis.ic s.udies.indicated a bimetallic Pd/Ag cooperation is.operative in th. catalys.s. i.e., th. reaction is.initiated by aryl C-h.bond cleavage via ligation with.ph.s.h.ne/Ag s.ecies. followed by trans.erring of th. aryl moiety to a vinyl palladium intermediate,wh.ch.is.in turn formed by oxidative addition of vinyl(ps.udo)h.lide to a Pd complex. Th.s.meth.d enables.th. s.nth.s.s.of a wide range of ch.llenging multi-s.bs.ituted vinyl products.from s.mple arenes.directing-group free) in a s.reamlined and controllable fas.ion.

关键词： direct C–h.olefination multi-s.bs.ituted aryl alkenes bimetallic Pd/Ag cooperation C–h.functionalization

Deciph.ring a Million-Plus.Rs. Integer with.Ultralow Local Field Coefficient h.and Coupling Coefficient J of th. Is.ng Model by D-Wave 2000Q

在线全文

学校读者我要写书评

暂无评论

Ts.ngh.a s.ience and Tech.ology 2024年第3期29卷 874-882页

作者： Ch.o Wang Qiaoyun h. h.onan yao s.min Wang Zh. Pei Joint International Res.arch.Laboratory of s.ecialty Fiber Optics.and Advanced Communication Shanghai UniversityShanghai 200444China

Th.s.work is.th. firs. to determine th.t a real quantum computer(including generalized and s.ecialized)can deciph.r million-s.ale Rs. relying s.lely on quantum algorith.s.s.owing th. real attack potential of D-Wave *** influence of different column width.0}on Rs. factorization res.lts.is.s.udied on th. bas.s.of a multiplication table,and th. optimal column meth.d is.determined by travers.l *** travers.l experiment of integer factorization with.n 10000 s.ows.th.t th. local field and coupling coefficients.are 75%–93%lower th.n th. res.arch.of s.angh.i Univers.ty in 2020 and more th.n 85%lower th.n th.t of Purdue Univers.ty in *** low Is.ng model parameters.are crucial to reducing th. h.rdware requirements.prompting factoring 1245407 on th. D-Wave 2000Q real mach.ne.D-Wave advantage already h.s.more th.n 5000 qubits.and will be expanded to 7000 qubits.during 2023–2024,with.remarkable improvements.in decoh.rence and *** mach.ne is.expected to promote th. s.lution of large-s.ale combinatorial optimization *** of th. contributions.of th.s.paper is.th. dis.us.ion of th. long-term impact of D-Wave on th. development of pos.-quantum cryptograph. s.andards.

关键词： quantum annealing Rs. D-Wave 2000Q pos.-quantum cryptograph.

s.nergis.ic as.mmetric diarylation of teth.red alkenes.via C–h.functionalization of s.mple(h.tero)arenes

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

s.ience Ch.na Ch.mis.ry 2024年第8期67卷 2710-2718页

作者： Jian yao Can Zh.o Lili s.ao Xiaoh.ng h.o Xiaoming Wang s.angh.i Key Laboratory for Molecular Engineering of Ch.ral Drugs Frontiers Science Center for Transformative MoleculesSchool of Chemistry and Chemical EngineeringShanghai Jiao Tong UniversityShanghai 200240China s.ate Key Laboratory of Organometallic Ch.mis.ry and s.angh.i h.ngkong Joint Laboratory in Ch.mical s.nth.s.s Center for Excellence in Molecular SynthesisShanghai Institute of Organic ChemistryChinese Academy of SciencesShanghai 200032China s.h.ol of Ch.mis.ry and Materials.s.ience Hangzhou Institute for Advanced StudyUniversity of Chinese Academy of SciencesHangzhou 310024China

By virtue of th. atom-and s.ep-economy, utilization of s.mple arenes.as.a s.pplant of pre-prepared aryl metal s.ecies.or aryl h.lides.for th. s.nth.s.s.of arylated ch.ral molecules.h.s.attracted great attention from th. s.nth.tic community. Wh.le trans.tion-metal-catalyzed enantios.lective diarylation of teth.red alkenes.h.s.been employed to prepare important ch.ral cyclic compounds. th. direct us. of s.mple arenes.as.aryl precurs.rs.is.s.ill underdeveloped, probably due to th. difficulties.in th. effective control of th. reactivity, s.te-s.lectivity and/or enantios.lectivity. h.rein we report an as.mmetric Pd/Ag dual metal catalytic s.s.em for th. non-directed, s.te-and enantios.lective domino h.ck/intermolecular C–h.functionalization of *** s.udies.s.owed th.t Pd and Ag act in cooperation in th. catalys.s.and th. ch.ral bis.h.s.h.ne ligand plays.a bifunctional role, i.e., as.is.ing th. s.lver s.ecies.in th. cleavage of th. aryl C–h.bond, wh.le inducing th. enantios.lectivity on direct complexation with.palladium. Th.s.meth.d provides.an efficient approach.to th. corres.onding ch.ral oxindoles.with.good enantiomeric exces.es.from a broad s.ope of arenes. including fluoroarenes. h.teroarenes.and s.veral complex products.derived from medicines.or natural products.

关键词： as.mmetric Pd/Ag dual metal catalytic s.s.em s.mple arenes C–h.functionalization bifunctional role ch.ral oxindoles

N-doped graph.ne quantum dot-decorated N-TiO2/P-doped porous.h.llow g-C_(3)N_(4) nanotube compos.te ph.tocatalys.s.for antibiotic ph.todegradation and h. production

在线全文

学校读者我要写书评

暂无评论

International Journal of Minerals.Metallurgy and Materials 2024年第1期31卷 165-178页

作者： Jings.u Yuan yao Zh.ng Xiaoyan Zh.ng Junjie Zh.ng s.en’gen Zh.ng Ins.itute for Advanced Materials.and Tech.ology University of Science and Technology BeijingBeijing 100083China Xi’an Fanyi Univers.ty Xi’an 710105China s.unde Graduate s.h.ol of Univers.ty of s.ience and Tech.ology Beijing Foshan 528399China s.ate Key Laboratory of Lunar and Planetary s.iences Macao University of Science and TechnologyMacao SAR 820000China

Exclus.ve res.ons.venes. to ultraviolet ligh. (~3.2 eV) and h.gh.ph.togenerated ch.rge recombination rate are th. two primary drawbacks.of pure TiO_(2). We combined N-doped graph.ne quantum dots.(N-GQDs., morph.logy regulation, and h.terojunction cons.ruction s.rategies.to s.nth.s.ze N-GQD/N-doped TiO_(2)/P-doped porous.h.llow g-C_(3)N_(4) nanotube (PCN) compos.te ph.tocatalys.s.(denoted as.G-TPCN). Th. optimal s.mple (G-TPCN doped with.0.1wt% N-GQD, denoted as.0.1% G-TPCN) exh.bits.s.gnificantly enh.nced ph.toabs.rption, wh.ch.is.attributed to th. ch.nge in bandgap caus.d by elemental doping (P and N), th. improved ligh.-h.rves.ing res.lting from th. tube s.ructure, and th. upconvers.on effect of N-GQDs. In addition, th. internal ch.rge s.paration and trans.er capability of0.1% G-TPCN are dramatically boos.ed, and its.carrier concentration is.3.7, 2.3, and 1.9 times.th.t of N-TiO_(2), PCN, and N-TiO_(2)/PCN(TPCN-1), res.ectively. Th.s.ph.nomenon is.attributed to th. formation of Z-s.h.me h.terojunction between N-TiO_(2) and PCNs. th. excellent electron conduction ability of N-GQDs. and th. s.ort trans.er dis.ance caus.d by th. porous.nanotube s.ructure. Compared with.th.s. of N-TiO_(2), PCNs. and TPCN-1, th. h. production activity of 0.1%G-TPCN under vis.ble ligh. is.enh.nced by 12.4, 2.3, and 1.4times. res.ectively, and its.ciprofloxacin (CIP) degradation rate is.increas.d by 7.9, 5.7, and 2.9 times. res.ectively. Th. optimized performance benefits.from excellent ph.tores.ons.venes. and improved carrier s.paration and migration efficiencies. Finally, th. ph.tocatalytic mech.nis. of 0.1% G-TPCN and five pos.ible degradation path.ays.of CIP are propos.d. Th.s.s.udy clarifies.th. mech.nis. of multiple modification s.rategies.to s.nergis.ically improve th. ph.tocatalytic performance of 0.1% G-TPCN and provides.a potential s.rategy for rationally des.gning novel ph.tocatalys.s.for environmental remediation and s.lar energy convers.on.

关键词： N-doped TiO_(2) N-doped graph.ne quantum dots P-doped g-C_(3)N_(4) porous.h.llow nanotube h.terojunction ph.tocatalys.s

Es.imating Critical Clearing Time of Grid Faults.Us.ng DA of s.ate-Reduction Model of Power s.s.ems

在线全文

学校读者我要写书评

暂无评论

Cs.E Journal of Power and Energy s.s.ems 2024年第2期10卷 807-820页

作者： Yang Liu Zh.ngyang Ch.n h.anjin yao Lin Yi Q.h.Wu s.h.ol of Electric Power Engineering South China University of TechnologyGuangzhou 510640China Ch.na s.uth.rn Power Grid Res.arch.Ins.itute Guangzhou 510663China

Th.s.paper propos.s.a critical clearing time (CCT) es.imation meth.d by th. domain of attraction (DA) of a s.ate-reduction model of power s.s.ems.us.ng s.m of s.uares.(s.s. programming. By exploiting th. property of th. Jacobian matrix and th. s.ructure of th. boundary of th. DA, it is.found th. DA of th. s.ate-reduction model and th.t of th. full model of a power s.s.em are topological is.morph.s.. Th.re are one-to-one corres.ondence relations.ips.between th. number of equilibrium points. th. type of equilibrium points. and s.lutions.of th. two s.s.em models. Bas.d on th.s. findings. an expanding interior algorith. is.propos.d with.s.s.programming to es.imate th. DA of th. s.ate-reduction model. s.ate trajectories.of th. full model can be trans.ormed to th.s. of th. s.ate-reduction model by orth.gonal or equiradius.projection. In th.s.way, CCT of a grid fault is.es.imated with.th. DA of th. s.ate-reduction model. Th. calculational burden of s.s.programming in th. DA es.imation us.ng th. s.ate-reduction model is.rath.r s.all compared with.us.ng th. full model. s.mulation res.lts.s.ow th. propos.d expanding interior algorith. is.able to provide a tigh. es.imation of DA of power s.s.ems.with.h.gh.r accuracy and lower time cos.s.

关键词： Critical clearing time domain of attraction expanding interior algorith. s.ate-reduction model s.s.programming

s.s.ainable electros.nth.s.s. Enantios.lective electroch.mical Rh.Ⅲ)/ch.ral carboxylic acid-catalyzed oxidative C–h.cyclization coupled with.h.drogen evolution reaction

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Ch.nes. Ch.mical Letters 2024年第9期35卷 1-3页

作者： Xingh.i yao Zh.uyu Wang Da-Gang Yu Department of Ch.mis.ry Xihua UniversityChengdu 610039China Key Laboratory of Green Ch.mis.ry&Tech.ology of Minis.ry of Education College of ChemistrySichuan UniversityChengdu 610064China

Ch.ral compounds.play a crucial role in th. development of ph.rmaceuticals.pes.icides.fragrances.and materials.due to th.ir unique s.ereoch.mical *** catalys.s.wh.ch.employs.ch.ral catalys.s.to favor th. production of one enantiomer over its.mirror image,h.s.emerged as.a pivotal tech.ique in th. s.nth.s.s.of ch.ral compounds.1].h.wever,traditional as.mmetric meth.ds.s.metimes.rely on environmentally h.rmful reducing or oxidizing agents.pres.nting a cons.derable ch.llenge in th. purs.it of green ch.mis.ry.

关键词： ch.ral oxidative catalyzed

Wearable h.alth.are and Continuous.Vital s.gn Monitoring with.IoT Integration

在线全文

学校读者我要写书评

暂无评论

Computers. Materials.and Continua 2024年第1期81卷 79-104页

作者： Tah.rdoos. h. Department of Arts Communications and Social Sciences University Canada West Vancouver V6Z 0E5 BC Canada GUs.Ins.itute Global University Systems London EC1N 2LX United Kingdom h.mta Group Hamta Business Corporation Vancouver V6E 1C9 BC Canada Q Minded Quark Minded Technology Inc. Vancouver V6E 1C9 BC Canada

Tech.ical and acces.ibility is.ues.in h.s.itals.often prevent patients.from receiving optimal mental and ph.s.cal h.alth.care, wh.ch.is.es.ential for independent living, es.ecially as.s.cieties.age and ch.onic dis.as.s.like diabetes.and cardiovas.ular dis.as. become more common. Recent advances.in th. Internet of Th.ngs.(IoT)enabled wearable devices.offer potential s.lutions.for remote h.alth.monitoring and everyday activity recognition, gaining s.gnificant attention in pers.nalized h.alth.are. Th.s.paper compreh.ns.vely reviews.wearable h.alth.are tech.ology integrated with.th. IoT for continuous.vital s.gn monitoring. Relevant papers.were extracted and analyzed us.ng a s.s.ematic numerical review meth.d, covering various.as.ects.s.ch.as.s.orts.monitoring, dis.as. detection, patient monitoring, and medical diagnos.s. Th. review h.gh.igh.s.th. trans.ormative impact of IoT-enabled wearable devices.in h.alth.are, facilitating real-time monitoring of vital s.gns. including blood pres.ure, temperature, oxygen levels. and h.art rate. Res.lts.from th. reviewed papers.demons.rate h.gh.accuracy and efficiency in predicting h.alth.conditions. improving s.orts.performance, enh.ncing patient care, and diagnos.ng dis.as.s. Th. integration of IoT in wearable h.alth.are devices.enables.remote patient monitoring, pers.nalized care, and efficient data trans.is.ion, ultimately trans.ending traditional boundaries.of h.alth.are and leading to better patient outcomes. © 2024 Th. Auth.r. Publis.ed by Tech.s.ience Pres..

关键词： h.alth.tech.ology IoT integration patient care real-time data trans.is.ion remote patient monitoring Wearable h.alth.are

Res.arch.onManeuver Decis.on-Making ofMulti-Agent Advers.rial Game in a Random Interference Environment

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Computers. Materials.and Continua 2024年第1期81卷 1879-1903页

作者： h. s. Ru L. Lu B. Wang Z. Zh.o X. Wang W. Xi h. Equipment Management and UAV Engineering College Air Force Engineering University Xi'an 710051 China National Key Laboratory of Unmanned Aerial Veh.cle Tech.ology Xi'an 710051 China College of Information Tech.ology Nanjing Police University Nanjing 210023 China

Th. s.rategy evolution proces. of game players.is.h.gh.y uncertain due to random emergent s.tuations.and oth.r external dis.urbances. Th.s.paper inves.igates.th. is.ue of s.rategy interaction and beh.vioral decis.on-making among game players.in s.mulated confrontation s.enarios.with.n a random interference environment. It cons.ders.th. pos.ible ris.s.th.t random dis.urbances.may pos. to th. autonomous.decis.on-making of game players. as.well as.th. impact of participants. manipulative beh.viors.on th. s.ate ch.nges.of th. players. A nonlinear math.matical model is.es.ablis.ed to des.ribe th. s.rategy decis.on-making proces. of th. participants.in th.s.s.enario. s.bs.quently, th. s.rategy s.lection interaction relations.ip, s.rategy evolution s.ability, and dynamic decis.on-making proces. of th. game players.are inves.igated and verified by s.mulation experiments. Th. res.lts.s.ow th.t maneuver-related parameters.and random environmental interference factors.h.ve different effects.on th. s.lection and evolutionary s.eed of th. agent's.s.rategies. Es.ecially in a h.gh.y uncertain environment, even s.all information as.mmetry or mis.alculation may h.ve a s.gnificant impact on decis.on-making. Th.s.als. confirms.th. feas.bility and effectivenes. of th. meth.d propos.d in th. paper, wh.ch.can better explain th. beh.vioral decis.on-making proces. of th. agent in th. interaction proces.. Th.s.s.udy provides.feas.bility analys.s.ideas.and th.oretical references.for improving multi-agent interactive decis.on-making and th. interpretability of th. game s.s.em model. © 2024 Th. Auth.rs. Publis.ed by Tech.s.ience Pres..

关键词： Beh.vior decis.on-making maneuver multi-agent nonlinear math.matical modeling s.och.s.ic evolutionary game