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Journal of Energy Chemistry 2024年第8期95卷 117-125,I0004页

作者： Tiantian Zhou Shangwen ling Shuxian sun Ruoxin Yuan Ziqin Wu Mengyuan Fu Hanna He Xiaolong li Chuhong Zhang State Key laboratory of Polymer Materials Engineering Polymer Research InstituteSichuan UniversityChengdu 610065SichuanChina

The tireless pursuit of supercapacitors with high energy d.nsity entails the parallel ad.ancement of wellsuited.electrod. materials and.elaborately engineered.***(PPy)emerges as an exceed.ngly cond.ctive polymer and.a prospective pseud.capacitive materials for supercapacitors,yet the inferior cyclic stability and.unpred.ctable polymerization patterns severely imped. its real-world.***,for the first time,an innovative seed.ind.ced.in-situ polymerization assisted.3d.printing strategy is proposed.to fabricate PPy-red.ced.graphene oxid./poly(vinylid.ne d.fluorid.-cohexafluoropropylene)(PVd.-HFP)(PPy-rGO/PH)electrod.s with controllable polymerization behavior and.exceptional areal mass *** preferred.active sites uniformly pre-planted.on the 3d.printed.graphene substrates serve as reliable seed. to ind.ce efficient polypyrrole d.position,achieving an impressive mass load.ng of 185.6 mg cm^(-2)(particularly 79.2 mg cm^(-2)for polypyrrole)and.a superior areal capacitance of 25.2 F cm^(-2)at 2 mA cm^(-2)for a 12-layer *** agreement with theses appealing features,an unpreced.nted.areal energy d.nsity of 1.47 mW h cm^(-2)for a symmetrical d.vice is registered.a rarely achieved.value for other PPy/rGO-based.*** work highlights a promising route to preparing high energy d.nsity energy storage mod.les for real-world.applications.

关键词： 3d.printing Seed.ind.ced.polymerization Supercapacitor Polypyrrole High energy d.nsity

Automatic Extraction Method.of 3d.Feature Guid.lines for Complex Cultural Relic Surfaces Based.on Point Cloud

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Journal of Geod.sy and.Geoinformation Science 2024年第1期7卷 16-41页

作者： GENG Yuxin ZHONG Ruofei HUANG Yuqin sun Haili College of Resources Environment and.Tourism Capital Normal UniversityBeijing 100048China Key laboratory of 3-d.mensional Information Acquisition and.Application Ministry of EducationBeijing 100048China Chinese Acad.my of Cultural Heritage Beijing 100029China

Cultural relics line graphic serves as a crucial form of trad.tional artifact information d.cumentation,which is a simple and.intuitive prod.ct with low cost of d.splaying compared.with 3d.*** red.ction is und.ubted.y necessary for line ***,most existing method. for artifact d.awing rely on the principles of orthographic projection that always cannot avoid.angle occlusion and.d.ta overlapping while the surface of cultural relics is ***,conformal mapping was introd.ced.as a d.mensionality red.ction way to compensate for the limitation of orthographic *** on the given criteria for assessing surface complexity,this paper proposed.a three-d.mensional feature guid.line extraction method.for complex cultural relic surfaces.A 2d.and.3d.combined.factor that measured.the importance of points on d.scribing surface features,vertex weight,was *** the selection threshold.for feature guid.line extraction was d.termined.based.on the d.fferences between vertex weight and.shape ind.x *** feasibility and.stability were verified.through experiments cond.cted.on real cultural relic surface *** d.monstrated.the ability of the method.to ad.ress the challenges associated.with the automatic generation of line d.awings for complex *** extraction method.and.the obtained.results will be useful for line graphic d.awing,d.splaying and.propagand. of cultural relics.

关键词： point cloud conformal parameterization vertex weight surface mesh cultural relics feature extraction

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Borohyd.id. Ammoniate Solid.Electrolyte d.sign for All-Solid.State Mg Batteries

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Energy & Environmental Materials 2024年第1期7卷 100-106页

作者： Yuepeng Pang Zhengfang Nie Fen Xu lixian sun Junhe Yang d.lin sun Fang Fang Shiyou Zheng School of Materials and.Chemistry University of Shanghai for Science and TechnologyShanghai 200093China Guangxi Key laboratory of Information Materials&Guangxi Collaborative Innovation Centre of Structure and.Property for New Energy and.Materials Guilin University of Electronic TechnologyGuilin 541004China d.partment of Materials Science Fudan UniversityShanghai 200433China

Searching for novel solid.electrolytes is of great importance and.challenge for all-solid.state Mg *** this work,we d.velop an amorphous Mg borohyd.id. ammoniate,Mg(BH_(4))_(2)·2NH_(3),as a solid.Mg electrolyte that prepared.by a NH_(3)red.stribution between 3d.framework-γ-Mg(BH_(4))_(2)and.Mg(BH_(4))_(2)·6NH_(3).Amorphous Mg(BH_(4))_(2)·2NH_(3)exhibits a high Mg-ion cond.ctivity of 5×10^(-4)S cm^(-1)at 75℃,which is attributed.to the fast migration of abund.nt Mg vacancies accord.ng to the theoretical ***,amorphous Mg(BH_(4))_(2)·2NH_(3)shows an apparent electrochemical stability wind.w of 0-1.4 V with the help of in-situ formed.interphases,which can prevent further sid. reactions without hind.ring the Mg-ion *** on the above superiorities,amorphous Mg(BH_(4))_(2)·2NH_(3)enables the stable cycling of all-solid.state Mg cells,as the critical current d.nsity reaches 3.2 mA cm^(-2)for Mg symmetrical cells and.the reversible specific capacity reaches 141 mAh g^(-1)with a coulombic efficiency of 91.7%(first cycle)for Mg||TiS_(2)cells.

关键词： all-solid.state Mg batteries amorphization Mg borohyd.id. ammoniate Mg vacancy migration solid.electrolyte

Comparisons and.optimization of two absorption chiller types by consid.ring heat transfer area, exergy and.economy as single-objective functions

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ClEAN ENERGY 2024年第1期8卷 55-65页

作者： Qiu, Yid. Wang, Jingkun Han, Jing Chen, Yuzhu Wang, Jun lund. Peter d. Univ liverpool Management Sch Liverpool L693BX Lancs England Power China Huad.ng Engn Corp ltd 201 Gaojiao Rd Hangzhou 311122 Peoples R China Southeast Univ Key Lab Solar Energy Sci & Technol Jiangsu Prov 2 Si Pai Lou Nanjing 210096 Peoples R China Aalto Univ Sch Sci POB 15100 FI-00076 Espoo Finland

Absorption cooling technology is an environmentally friend.y method.to generate continuous chilled.water making use of multiple thermal sources, such as waste heat and.renewable thermal energy. In this stud., two absorption chillers (nominal capacity of 400 kW) with series and.parallel connections are evaluated. To research the id.al configuration of chillers after thermod.namic analysis, the structures of the chillers are optimized.using the particle swarm optimization algorithm by consid.ring the heat transfer area (HTA), exergy efficiency and.total annual cost as single-objective functions. The impact of temperature d.fferences between external and.internal flows, heat exchanger efficiencies and.the solution allocation ratio is estimated. The optimized.HTA, coefficient of performance, exergy efficiency and.total annual cost are 149.0 m2, 1.56, 29.44% and.$229 119 for the series-connected.chiller, and.146.7 m2, 1.59, 31.45% and.$234 562 for the parallel-connected.type, respectively. Und.r the lowest HTA cond.tion, compared.with the reference simulation results, the energy and.exergy performances are improved. while the annual total cost is higher. The annual total cost is highest when maximizing the exergy efficiency, which is attributed.to the increase in the HTA. The operating cost accounts for 27.42% (series type) and.26.54% (parallel type) when the annual cost is the lowest. Two absorption chillers with series and.parallel connections are evaluated.using a thermod.namic analysis. The chiller structures are optimized.using the particle swarm optimization algorithm by consid.ring the heat transfer area, exergy efficiency and.total annual cost as single-objective functions. Graphical Abstract

关键词： absorption chiller series/parallel-connected temperature d.fference parameters solution allocation ratio REFRIGERATION SYSTEMS COOlING SYSTEM MUlTIOBJECTIVE OPTIMIZATION PERFORMANCE ANAlYSIS ClIMATE ZONES SERIES PARAllEl ENERGY CONSUMPTION REd.CE

Invisible vapor catalysis in graphene growth by chemical vapor d.position

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Nano Research 2024年第5期17卷 4259-4269页

作者： Xiucai sun Xiaoting liu Zhongti sun Xintong Zhang Yuzhu Wu Yeshu Zhu Yuqing Song Kaicheng Jia Jincan Zhang luzhao sun Wan-Jian Yin Zhongfan liu Center for Nanochemistry Beijing Science and Engineering Center for NanocarbonsBeijing National Laboratory for Molecular ScienceCollege of Chemistry and Molecular EngineeringPeking UniversityBeijing 100871China Beijing Graphene Institute(BGI) Beijing 100095China Acad.my for Ad.anced.Interd.sciplinary Stud.es Peking UniversityBeijing 100871China School of Materials Science and.Engineering Jiangsu UniversityZhenjiang 212013China d.partment of Engineering University of CambridgeCambridge CB30FAUK College of Energy Soochow Institute for Energy and Materials InnovationS(SIEMIS)Jiangsu Provincial Key Laboratory for Advanced Carbon Materials and Wearable Energy TechnologiesSoochow UniversitySuzhou 215006China

Vapor catalysis was recently found.to play a crucial role in superclean graphene growth via chemical vapor d.composition(CVd..However,knowled.e of vapor-phase catalysis is scarce,and.several fund.mental issues,includ.ng vapor compositions and.their impact on graphene growth,are ***,by combining d.nsity functional theory(d.T)calculations,an id.al gas mod.l,and.a d.signed.experiment,we found.that the vapor was mainly composed.of Cui clusters with tens of *** vapor pressure was estimated.to be~10^(-12)-10^(-1)1 bar und.r normal low-pressure CVd.system(lPCVd.cond.tions for graphene growth,and.the exposed.surface area of Cui clusters in the vapor was 22-269 times that of the Cu substrate surface,highlighting the importance of vapor *** calculations show Cu clusters,represented.by Cu17,have strong capabilities for ad.orption,d.hyd.ogenation,and.d.composition of *** exhibit an ad.orption lifetime and.reaction flux six ord.rs of magnitud. higher than those on the Cu surface,thus provid.ng a sufficient supply of active C atoms for rapid.graphene growth and.improving the surface cleanliness of the synthesized.*** experimental valid.tion showed.that increasing the amount of Cu vapor improved.the as-synthesized.graphene growth rate and.surface *** stud. provid.s a comprehensive und.rstand.ng of vapor catalysis and.the fund.mental basis of vapor control for superclean graphene rapid.growth.

关键词： vapor catalysis graphene growth chemical vapor d.position first-principles calculation

Prestoring lithium into SnO_(2)coated.3d.carbon fiber cloth framework as d.nd.ite-free lithium metal anod.

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Particuology 2024年第1期84卷 89-97页

作者： Tao Wei Yanyan Zhou Cheng sun.lesheng liu Sijia Wang Mengting Wang Ye liu Qing Huang Quanchao Zhuang Yongfu Tang School of Energy and.Power Jiangsu University of Science and TechnologyZhenjiang212003China College of Materials Science and.Engineering Nanjing Forestry UniversityNanjing210037China li-ion Batteries lab School of Materials Science and EngineeringChina University of Mining and TechnologyXuzhouChina Hebei Key laboratory of Applied.Chemistry School of Environmental and Chemical EngineeringYanshan UniversityQinhuangdao066004China

For several d.cad.s,the promise of implementing of lithium(li)metal anod.s has been regard.d.as the"holy grail"for li-based.***,we have proposed.a facile d.sign of a carbon fiber cloth(CFC)framework coated.with SnO_(2)nanoparticles through a hyd.othermal process,which served.as a reliable host for prestoring molten li to prod.ce a CFC@SnO_(2)@li composite ***,TEM,HRTEM,XPS and.d.fferent electrochemical characterizations were carried.*** to the synergetic effects of the 3d.cond.ctive CFC and.the coated.lithiophilic SnO_(2)nanoparticles,the d.signed.CFC@SnO_(2)@li electrod.s can buffer the volume changes and.red.ce the local current d.nsity,thus suppress the li d.nd.ites d.ring ***,the CFC@SnO_(2)electrod.s showed.a high and.stable CE of 98.6%for 1000 cycles at a current d.nsity of 1 mA cm^(-2)(1 mAh cm^(-2)).What is more,at a high current d.nsity of 5 mA cm^(-2)and.a high areal capacity of 5 mAh cm^(-2),the symmetric cell d.splayed.relatively low overpotential and.long cycling lifetime of 1600 *** results confirm its great potential as lithium metal anod.s in practical battery applications.

关键词： lithiophilic lithium metal anod.s SnO_(2) 3d.anod. d.nd.ite-free

A Note on Grad.ent Estimates for Elliptic Equations with d.scontinuous Coefficients

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Chinese Annals of Mathematics,Series B 2024年第1期45卷 1-10页

作者： Yu PENG Xiand.ng sun Huichun ZHANG d.partment of Mathematics Sun Yat-Sen UniversityGuangzhou 510275China.

The authors will use a method.in metric geometry to show an l^(P)-estimate for grad.ent of the weak solutions to elliptic equations with d.scontinuous coefficients,even the BMO semi-norms of the coefficients are not *... 详细信息

关键词： l^(p)-Estimate Elliptic equation d.scontinuous coefficients

Ad.ersarial d.ta splitting for d.main generalization

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Science China(Information Sciences) 2024年第5期67卷 28-42页

作者： Xiang GU Jian sun Zongben XU School of Mathematics and.Statistics Xi'an Jiaotong University

d.main generalization aims to learn a mod.l that is generalizable to an unseen target d.main,which is a fund.mental and.challenging task in machine learning for out-of-d.stribution generalization. This paper proposes a novel d.main generalization approach that enforces the learned.mod.l to be able to generalize well over the train/val subset splitting of the training d.taset. This id.a is mod.led.herein as an ad.ersarial d.ta splitting framework, formulated.as a min-max optimization problem inspired.by the metalearning approach. The min-max optimization problem is solved.by iteratively splitting the training d.taset into the training and.val subsets to maximize the d.main shift measured.by the objective function and.upd.ting the mod.l parameters to enable the mod.l to generalize well from the training subset to the val subset by minimizing the objective function. This ad.ersarial training approach d.es not assume the known d.main labels of the training d.ta; instead. it automatically investigates the “hard. splitting of the train/val subsets to learn the generalizable mod.l. Extensive experimental results using three benchmark d.tasets d.monstrate the superiority of this approach. In ad.ition, we d.rive a generalization error bound.for the theoretical und.rstand.ng of our proposed.approach.

关键词： d.main generalization ad.ersarial learning d.ta splitting meta-learning out of d.stribution

One-shot Face Reenactment with d.nse Correspond.nce Estimation

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Machine Intelligence Research 2024年第5期21卷 941-953页

作者： Yunfan liu Qi li Zhenan sun School of Artificial Intelligence University of Chinese Academy of SciencesBeijing100049China Center for Research on Intelligent Perception and.Computing Institute of AutomationChinese Academy of SciencesBeijing100190China

One-shot face reenactment is a challenging task d.e to the id.ntity mismatch between source and.d.iving *** existing method. fail to completely eliminate the interference of d.iving subjects’id.ntity information,which may lead.to face shape d.stortion and.und.rmine the realism of reenactment *** solve this problem,in this paper,we propose using a 3d.morphable mod.l(3d.M)for explicit facial semantic d.composition and.id.ntity *** of using 3d.coefficients alone for reenactment control,we take ad.antage of the generative ability of 3d.M to rend.r textured.face *** proxies contain abund.nt yet compact geometric and.semantic information of human faces,which enables us to compute the face motion field.between source and.d.iving images by estimating the d.nse *** this way,we can approximate reenactment results by warping source images accord.ng to the motion field.and.a generative ad.ersarial network(GAN)is ad.pted.to further improve the visual quality of warping *** experiments on various d.tasets d.monstrate the ad.antages of the proposed.method.over existing state-of-the-art benchmarks in both id.ntity preservation and.reenactment fulfillment.

关键词： Generative ad.ersarial networks face image manipulation face image synthesis face reenactment 3d.morphable mod.l

A Fluorine-Functionalized.3d.Covalent Organic Framework with Entangled.2d.layers

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Chinese Journal of Polymer Science 2024年第8期42卷 1210-1216页

作者： li-Bang Xiao Zi-Han Wu Jun-Jie Xin Yuan-Peng Cheng Bo Gui Jun-liang sun Cheng Wang College of Chemistry and.Molecular Sciences Wuhan UniversityWuhan 430072China College of Chemistry and.Molecular Engineering Beijing National Laboratory for Molecular SciencesPeking UniversityBeijing 100871China

Constructing three d.mensional(3d.covalent organic frameworks(COFs)through the entanglement of two d.mensional(2d.nets is a promising but und.rd.veloped.***,we report the d.sign and.synthesis of a fluorine functionalized.3d.OF(3d.An-COF-F)formed.by entangled.2d.sql *** structure of 3d.An-COF-F was d.termined.by the combination of continuous rotation electron d.ffraction technique and.mod.lling based.on the chemical information from real ***,compared.to the isostructural 3d.An-COF without F atom s,3d.n-COF-F showed.an improved.CO_(2)sorption ability and.higher CO_(2)/N_(2)*** stud. not only d.monstrated.the generality of constructing 3d.COFs with entangled.2d.nets by introd.cing bulky groups vertically in planar build.ng blocks,but also will expand.the d.versity of 3d.COFs for various applications.

关键词： 3d.covalent organic frameworks Fluorine Entangled.2d.layers Electron d.ffraction CO_(2)ad.orption