检索结果-南通市图书馆

Dynamic response of UHMWPE plates under combined shock and fragment loading

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Defence Technology（防务技术） 2023年第9期27卷 9-23页

作者： Chun-Zheng Zhao Lu-Sheng qiang Rui zhang qian-cheng zhang Jun-Yang Zhong Zhen-Yu Zhao Tian Jian Lu State Key Laboratory of Mechanics and Control of Mechanical Structures Nanjing University of Aeronautics and AstronauticsNanjing210016PR China MIIT Key Laboratory of Multi-functional Lightweight Materials and Structures(MLMS) Nanjing University of Aeronautics and AstronauticsNanjmg 210016PR China State Key Laboratory of New Textile Materials and Advanced Processing Technologies Wuhan Textile UniversityWuhai430200PR China School of Aerospace Xi'an Jiaotong UniversityXi'an710049PR Chuia

Ultra-high molecular weight polyethylene(UHMWPE)fiber composite has been extensively used to construct lightweight protective structures against ballistic impacts,yet little is known about its performance when subjected to combined blast and fragment *** upon a recently developed laboratory-scale experimental technique to generate simulated combined loading through the impact of a fragment-foam composite projectile launched from a light gas gun,the dynamic responses of fullyclamped UHMWPE plates subjected to combined loading were characterized experimentally,with corresponding deformation and failure modes compared with those measured with simulated blast loading ***,to explore the underlying physical mechanisms,three-dimensional(3D)numerical simulations with the method of finite elements(FE)were systematically carried *** predictions compared favorably well with experimental measurements,thus validating the feasibility of the established FE *** to the case of blast loading alone,combined blast and fragment loading led to larger maximum deflections of clamped UHMWPE *** position of the FSP in the foam sabot affected significantly the performance of a UHMWPE target,either enhancing or decreasing its ballistic *** the blast loading and fragment impact arrived simultaneously at the target,its ballistic resistance was superior to that achieved when subjected to fragment impact alone,and benefited from the accelerated movement of the target due to simultaneous blast loading.

关键词： UHMWPE composite Ballistic performance Combined blast and fragment loading Impact test Finite element simulation

Influence of cutting off position of plasma filament formed by two-color femtosecond laser on terahertz generation

在线全文

学校读者我要写书评

暂无评论

Chinese Physics B 2018年第5期27卷 194-197页

作者： Zhan-qiang Xue Li-Ping Shang Hu Deng qian-cheng zhang Quan-cheng Liu Wei-Wei Qu Zhan-Feng Li Shun-Li Wang College of Information Engineer Southwest University of Science and TechnologyMianyang 621010China Robot Technology Used for Special Environment Key Laboratory of Sichuan Province Mianyang 621010China College of Manufacturing Science and Engineering Southwest University of Science and TechnologyMianyang 621010China

Femtosecond laser filamentation is a method of generating terahertz,which has wide application in terahertz subwavelength resolution *** this paper,the plasma filament formed by femtosecond laser focusing was terminated with an alumina ceramics at different positions and the influence of the cutting off position of the plasma filament on the terahertz wave was *** results showed that the terahertz amplitude increases as the position approaches the end of the filament *** stability of amplitude and peak frequency of the terahertz generated by the filament formed by two-color femtosecond laser via a lens with a longer focal length is lower than that through a lens with a shorter focal length,especially the terahertz amplitude at the end of the *** study will be helpful for future researchers in the field of THz sub-wavelength imaging utilizing femtosecond laser filament.

关键词： terahertz laser filament

Dynamic response of clamped sandwich beams: analytical modeling

在线全文

学校读者我要写书评

暂无评论

Theoretical & Applied Mechanics Letters 2019年第6期9卷 391-396页

作者： Lang Li Bin Han qian-cheng zhang Zhen-Yu Zhao Tian Jian Lu State Key Laboratory for Strength and Vibration of Mechanical Structures Xi'an Jiaotong UniversityXi'an 710049China State Key Laboratory of Mechanics and Control of Mechanical Structures Nanjing University of Aeronautics and AstronauticsNanjing 210016China School of Mechanical Engineering Xi'an Jiaotong UniversityXi'an 710049China dSchool of Engineering Brown UniversityProvidenceRI 02912USA Research Institute of Xi'an Jiaotong University Hangzhou 311215China Key Laboratory of Intense Dynamic Loading and Effect Xi'an 710024China Nanjing Center for Multifunctional Lightweight Materials and Structures(MLMS) Nanjing University of Aeronautics and AstronauticsNanjing 210016China

An improved analytical model is developed to predict the dynamic response of clamped lightweight sandwich beams with cellular cores subjected to shock loading over the entire *** clamped face sheets are simplified as a single-degree-of-freedom(SDOF)system,and the core is idealized using the rigid-perfectly-plastic-locking(RPPL)*** of incident shock wave is considered by incorporating the bending/stretching resistance of the front face sheet and compaction of the *** model is validated with existing analytical predictions and FE simulation results,with good agreement *** with existing analytical models,the proposed model exhibits superiority in two aspects:the deformation resistance of front face sheet during shock wave reflection is taken into account;the effect of pulse shape is *** practical application range of the proposed model is therefore wider.

关键词： Sandwich beam Cellular core Shock loading Analytical model

在线全文

学校读者我要写书评

暂无评论

宏观超分子组装——超分子材料制备新理念

中国科学：化学 2017年第7期47卷 816-829页

作者：成梦娇张倩石峰化工资源有效利用国家重点实验室北京化工大学材料科学与工程学院北京100029

近年来,宏观超分子组装已经逐渐发展成为超分子化学中的一个新兴研究方向.宏观超分子组装是指特征尺寸在微米及微米以上尺度的构筑基元,通过分子间相互作用发生组装,形成有序结构的过程,是实现"全尺度自组装"不可或缺的环节,为超分子体... 详细信息

近年来,宏观超分子组装已经逐渐发展成为超分子化学中的一个新兴研究方向.宏观超分子组装是指特征尺寸在微米及微米以上尺度的构筑基元,通过分子间相互作用发生组装,形成有序结构的过程,是实现"全尺度自组装"不可或缺的环节,为超分子体相材料的制备提供了新的理念和方案.本文从宏观超分子组装的发展概况、设计原则与策略和应用方向3个方面展开综述,介绍了从基于长程作用力的"宏观组装"到基于分子间相互作用的"宏观超分子组装"的区别与联系,阐释了实现宏观超分子组装的设计原则和相关机理.最后,针对实现超分子材料广泛应用的目标,从"精准组装"的角度综述了提高组装结构有序程度的方法,以及宏观超分子组装在组织工程支架等方面的应用前景.

关键词：宏观超分子组装超分子材料多重相互作用组织工程支架

Synergistically enhanced ORR and HER performance on Co-N-C coupled in-situ generated PtCo intermetallic

在线全文

学校读者我要写书评

暂无评论

Journal of Energy Chemistry 2025年第1期100卷 721-729页

作者： Guanyu Luo Min Song Lulu An Xiao Huang qian zhang Chenhao zhang Tao Shen Shuang Wang Deli Wang Key Laboratory of Material Chemistry for Energy Conversion and Storage (Huazhong University of Science and Technology) Ministry of Education School of Chemistry and Chemical Engineering Huazhong University of Science and Technology

Integrating multi-scale sites in a composite catalyst is vital to realize efficient ***,a synergistic composite catalyst consisting of Co atomic sites and in-situ generated PtCo intermetallic compounds （IMCs）(o-PtCo@CoNC) is proposed through Co pre-anchoring and subsequent impregnation-reduction *** loading of Co atoms provides a chance for in-situ generating PtCo ordered intermetallic *** remaining Co single atoms and PtCo IMCs construct synergistic electrocatalytic *** from the ordered structure,synergistic effect of Pt Co IMCs and Co single atoms,o-PtCo@CoNC exhibits excellent electrocatalytic performance for oxygen reduction reaction （ORR） and hydrogen evolution reaction （HER） with mass activity of 1.21 A mgPt-1（at 0.9 V） and5.70 A mgPt-1（at an overpotential of 100 mV）,***,o-PtCo@CoNC delivers negligible loss of half-wave potential and overpotential during long-term stability test in acid solutions,with 13 mV decay after 50,000 potential cycles for ORR and a 2.7 mV decay after 20,000 potential cycles for *** integration strategy of single-atomic sites coupled IMCs paves the way for enhancing the activity and durability of Pt-based electrocatalysts.

关键词： Electrolytic reduction

Revolutionizing photothermal CO_(2)hydrogenation with ceria-based catalysts

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Nano Research 2025年第1期18卷 30-49页

作者： Zhaorui zhang Xiao Han Junhong zhang Yunyun Dong Jinsheng Zhao qian Xu ingqiang zhang School of Chemistry and Chemical Engineering Liaocheng UniversityLiaocheng 252059China Institute for Catalysis Hokkaido UniversityN-21W-10Sapporo 001-0021Japan National Synchrotron Radiation Laboratory University of Science and Technology of ChinaHefei 230029China

In the context of achieving carbon neutrality,CO_(2)catalytic conversion technologies are effective in reducing atmospheric CO_(2)concentrations while simultaneously producing renewable *** approach is seen as a viable method for constructing a new carbon cycle,thereby effectively addressing the issue of global *** CO_(2)conversion has recently emerged as a promising research focus due to its high energy utilization efficiency,superior CO_(2)conversion,excellent product selectivity,mild operating conditions,low energy consumption and minimal operating *** oxide(CeO_(2))has been widely used in photothermal catalysis due to its unique chemical properties,particularly when used as a support material with supported metals,creating distinctive interfacial sites for catalytic *** an emerging star support in photothermal CO_(2)conversion,its contributions are equally significant and should not be ***,to our knowledge,there has been no comprehensive review of CeO_(2)applications in catalytic hydrogenation of CO_(2).In this paper,we summarize and discuss CeO_(2)-based materials for photothermal CO_(2)conversion to value-added *** research particularly focuses on the synthesis methods of CeO_(2)-supported catalysts,the history of CeO_(2)in photothermal catalysis,types of photothermal catalytic reactors,unique characterization methods for the photothermal catalysts and the photothermal CO_(2)hydrogenation reactions by CeO_(2)-based *** related to further challenges and future directions for photothermal CO_(2)hydrogenation are also provided.

关键词： CO_(2)neutrality hydrogenation photothermal catalysis ceria C1 chemistry

Rational modulation of fluorophosphate cathode by anionic groups to reduce the polarization behavior for fast-charging sodium-ion batteries

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Energy Chemistry 2025年第1期100卷 509-521页

作者： Xinyuan Wang Fan zhang Xingyu Zhou qian Wang Changyu Liu Yangyang Liu Hui Wang Xiaojie Liu Key Laboratory of Synthetic and Natural Functional Molecule of the Ministry of Education College of Chemistry & Materials Science Northwest University

Na3V2（PO4）2O2F （VP） is recognized as a promising cathode material for sodium-ion batteries due to its stable structural framework and high specific *** functional theory （DFT） and finite element simulations show that incorporating SO42-into VP decreases its band gap,lowers the migration energy barrier,and ensures a uniform Na+concentration gradient and stress distribution during charge and discharge ***,the average Na+diffusion coefficient of Na3V2（PO4）1.95（SO4）0.05O2F（VPS-1） is roughly double that of VP,leading to enhanced rate capability (80 C,75.5 mAh g-1) and cycling stability (111.0 mAh g-1capacity after 1000 cycles at 10 C current density) for ***-1 exhibits outstanding fast-charging capabilities,achieving an 80%state of charge in just 8.1 *** assembled VPS-1//SbSn/NPC full cell demonstrated stable cycling over 200 cycles at a high 5 C current,maintaining an average coulombic efficiency of 95.35%.

关键词： Anionic group modulation Polarization behavior Fast-charging Sodium-ion battery Fluorophosphate Cathode

Dielectric-ion-conductive ZnNb2O6 layer enabling rapid desolvation and diffusion for dendrite-free Zn metal batteries

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Journal of Energy Chemistry 2025年第1期100卷 693-701页

作者： Haifeng Yang Jian Wang Panpan zhang Xiaomin cheng Qinghua Guan Jing Dong Bixian Chen Lujie Jia Jing zhang Yongzheng zhang Yunjian Liu Hongzhen Lin School of Materials Science and Engineering Jiangsu University i-Lab & CAS Key Laboratory of Nanophotonic Materials and Devices Suzhou Institute of Nano-Tech and Nano-Bionics Chinese Academy of Sciences Helmholtz Institute Ulm (HIU) Karlsruhe Institute of Technology (KIT) School of Materials Science and Engineering Xi'an University of Technology State Key Laboratory of Chemical Engineering East China University of Science and Technology

Rechargeable aqueous zinc-metal batteries （AZMBs） are promising candidates for large-scale energy storage systems due to their low cost and high ***,their performance and sustainability are significantly hindered by the sluggish desolvation kinetics at the electrode/electrolyte interface and the corresponding hydrogen evolution reaction where active water molecules tightly participate in the Zn（H2O）62+solvation ***,learnt from self-generated solid electrolyte interphase （SEI） in anodes,the dielectric but ion-conductive zinc niobate nanoparticles artificial layer is constructed on metallic Zn surface （ZNB@Zn）,acting as a rapid desolvation *** zincophilic and dielectric-conductive properties of ZNB layer accelerate interfacial desolvation/diffusion and suppress surface corrosion or dendrite formation,achieving uniform Zn plating/stripping behavior,as confirmed by electronic/optical microscopies and interface spectroscopical measurements together with theoretical ***,the as-prepared ZNB@Zn electrode exhibits excellent cycling stability of over 2000 h and robust reversibility （99.54%） even under high current density and depth of discharge ***,the assembled ZNB@Zn-based full cell displays high capacity-retention rate of 80.21%after 3000 cycles at 5 A g-1and outstanding rate performance up to 10 A *** large-areal pouch cell is stabilized for hundreds of cycles,highlighting the bright prospects of the dielectric but ion-conductive layer in further application of AZMBs.

关键词： Zn metal battery Dielectric artificial layer Rapid ion diffusion Zincophilic diffusion Active water inhibition

Identifying the dynamic behaviors in complete reconstruction of Co-based complex precatalysts during electrocatalytic oxygen evolution

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Journal of Energy Chemistry 2025年第1期100卷 226-233页

作者： Jingfang zhang Danyang Wu Linke Cai Youluan Lu Fanpeng cheng Lijuan Shi Qun Yi Yao Liu Yi Huang Key Laboratory of Green Chemical Engineering Process of Ministry of Education Engineering Research Center of Phosphorus Resources Development and Utilization of Ministry of Education Hubei Key Laboratory of Novel Reactor and Green Chemical Technology School of Chemical Engineering & Pharmacy Wuhan Institute of Technology Key Laboratory of Pesticide & Chemical Biology of Ministry of Education Engineering Research Center of Photoenergy Utilization for Pollution Control and Carbon Reduction of Ministry of Education College of Chemistry Central China Normal University College of Materials Science and Engineering Fuzhou University

Transition metal-based nanomaterials have emerged as promising electrocatalysts for oxygen evolution reaction（OER）. Considerable research efforts have shown that self-reconstruction occurs on these nanomaterials under operating conditions of OER process. However, most of them undergo incomplete reconstruction with limited thickness of reconstruction layer, leading to low component utilization and arduous exploration of real catalytic mechanism. Herein, we identify the dynamic behaviors in complete reconstruction of Co-based complexes during OER. The hollow phytic acid（PA） cross-linked CoFe-based complex nanoboxes with porous nanowalls are designed because of their good electrolyte penetration and mass transport ability, in favor of the fast and complete reconstruction. A series of experiment characterizations demonstrate that the reconstruction process includes the fast substitution of PA by OH-to form Co（Fe）(OH)xand subsequent potential-driven oxidation to Co（Fe）OOH. The obtained CoFeOOH delivers a low overpotential of 290 mV at a current density of 10 mA cm-2and a long-term *** experiment results together with theory calculations reveal that the Fe incorporation can result in the electron rearrangement of reconstructed CoFeOOH and optimization of their electronic structure,accounting for the enhanced OER activity. The work provides new insights into complete reconstruction of metal-based complexes during OER and offers guidelines for rational design of high-performance electrocatalysts.

关键词： Complete reconstruction Co-based complex Precatalysts Oxygen evolution reaction