检索结果-南通市图书馆

A mild, configurable, flexible CoNi-LDH（v）/Zn battery based on H-vacancy-induced reversible Zn2+ intercalation

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 498-508页

作者： Xinyue Cheng Dingsheng Wu Hao gao Qingqing Wang Pengfei Lv Sam S.Yoon Qufu Wei Key Laboratory of Eco-textiles Ministry of Education Jiangnan University School of Mechanical Engineering Korea University

Flexible Zn-based batteries have attracted increasing research interest as essential components of wearable energy storage ***,the advancement of flexible aqueous Zn-based batteries based on Co-Ni layered double hydroxide （CoNi-LDH） as the cathode material is hampered by their poor cycling stability and the corrosiveness of alkaline ***,CoNi-LDH nanosheets enriched with H vacancies (CoNi-LDH（v）) were constructed on a flexible carbon cloth （CC） substrate via electrochemical deposition and *** Zn-based battery comprising CoNi-LDH（v）@CC as the cathode exhibited highly reversible conversion reactions and stable operation in 3 M ZnSO4electrolyte （pH=4）.The battery delivered an excellent specific capacity (225 mA h g-1,0.26 mA h cm-2),acceptable cycling stability（53.9%,900 cycles）,and high discharging *** abundant H vacancies served as active sites for the reversible intercalation of Zn2+and the extravasation of NO3-generated channels and space for Zn2+transport and storage,together enabling an excellent Zn2+storage ***,a sandwich-structured solid-state CoNi-LDH（v）@CC//Zn@CC battery was fabricated and was found to exhibit a noteworthy electrochemical performance and mechanical *** a proof of concept,the unencapsulated battery powered a digital watch under various deformation conditions and operated stably for 80 ***,the flexible battery displayed outstanding customizability,maintaining an open-circuit voltage of 1.42 V even after being cut *** proposed engineering strategy contributes to the realization of textiles with truly wearable energy-storage devices.

关键词： CoNi/Zn battery H vacancies Mild aqueous electrolyte Tailorable battery Wearable energy storage device

Low-cost and fluoride-free synthesis of MFI zeolite nanosheets with enhanced stability for benzene alkylation with ethanol

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 458-468页

作者： Peng Zhu Cun Liu Yiren Yu Guoshu gao Yumeng Zhao Xiongfu Zhang Guodong Liu Guohui Yang State Key Laboratory of Fine Chemicals School of Chemical Engineering Dalian University of Technology State Key Laboratory of Catalysis Dalian Institute of Chemical Physics Chinese Academy of Sciences

Zeolite nanosheets with a short b-axis thickness are highly desirable in lots of catalytic reactions due to their reduced diffusion resistance. Nevertheless, conventional synthesis methods usually require expensive structure-directing agents(SDAs), pricey raw materials, and eco-unfriendly fluorine-containing additives. Here, we contributed a cost-effective and fluoride-free synthesis method for synthesizing high-quality MFI zeolite nanosheets through a Silicalite-1(Sil-1) seed suspension and urea cooperative strategy, only with inexpensive colloidal silica as the Si source. Our approach was effective for synthesizing both Sil-1 and aluminum-containing ZSM-5 nanosheets. By optimizing key synthesis parameters,including seed aging time, seed quantity, and urea concentration, we achieved precise control over the crystal face aspect ratio and b-axis thickness. We also revealed a non-classical oriented nanosheet growth mechanism, where Sil-1 seeds induced the formation of quasi-ordered precursor particles, and the(010)crystal planes of these particles facilitated urea adsorption, thereby promoting c-axis-oriented *** obtained ZSM-5 nanosheets exhibited exceptional catalytic performance in the benzene alkylation with ethanol, maintaining stability for over 500 h, which is 5 times longer than traditional ZSM-5 catalysts. Furthermore, large-scale production of ZSM-5 nanosheets was successfully carried out in a 3 L highpressure autoclave, yielding samples consistent with those from laboratory-scale synthesis. This work marks a significant step forward in the sustainable and efficient production of MFI nanosheets using inexpensive and environmentally friendly raw materials, offering the broad applicability in catalysis.

关键词： Aspect ratio

砂砾石地基上板桩贯入度对水闸渗流稳定的影响

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

山西建筑 2025年第3期51卷 166-169页

作者：高凤陕西省建筑职工大学陕西西安710043

闸室稳定性、结构强度、闸基渗流稳定等是影响水闸安全的主要因素,在水闸失事原因中,由于渗流破坏引起的事故占比大,因此,水闸的渗流计算的研究具有十分重要的实际意义。文章用改进阻力法计算板桩不同贯入度0%,10%,20%,30%,40%,50%,60%,... 详细信息

闸室稳定性、结构强度、闸基渗流稳定等是影响水闸安全的主要因素,在水闸失事原因中,由于渗流破坏引起的事故占比大,因此,水闸的渗流计算的研究具有十分重要的实际意义。文章用改进阻力法计算板桩不同贯入度0%,10%,20%,30%,40%,50%,60%,70%,80%,90%,95%,96%,97%,98%,99%,100%闸底板水平渗透坡降和出口出逸坡降,得出了板桩不同贯入度的防渗规律;在给定闸底板水平和出口容许渗透坡降情况下,得出了板桩最佳贯入度;用AutoBank有限元软件计算板桩最佳贯入度情况下的闸底板水平渗透坡降和出口出逸坡降,并对两种计算方法的结果进行比较分析,得出两种方法的适用性。

关键词：水闸贯入度渗流稳定有限元

在线全文

学校读者我要写书评

暂无评论

滚筒烘丝机工艺参数对烤烟感官质量的影响

烟草科技 2011年第11期44卷 10-13,18页

作者：张强董高峰李红武向明周桂园陈剑明云南烟草科学研究院昆明市高新区科医路41号650106 红云红河烟草(集团)责任有限公司昆明市红锦路181号650202

为分析滚筒烘丝机工艺参数对感官质量的影响,对烘丝机工艺参数与感官质量各指标进行了简单相关、逐步回归、贡献率分析研究,并采用均匀设计方法对烘丝机筒壁温度、HT63蒸汽压力、烘丝机筒体转速、热风风门开度和热风温度等5个工艺参数... 详细信息

为分析滚筒烘丝机工艺参数对感官质量的影响,对烘丝机工艺参数与感官质量各指标进行了简单相关、逐步回归、贡献率分析研究,并采用均匀设计方法对烘丝机筒壁温度、HT63蒸汽压力、烘丝机筒体转速、热风风门开度和热风温度等5个工艺参数进行了组合试验。结果表明:①HT63蒸汽压力与劲头达到了显著正相关,但其余各个工艺参数与感官质量各指标的相关性未达到显著水平。②在所测试的工艺指标中,筒壁温度对香气质、香气量、杂气、干净程度和评吸总分的贡献率最大;热风温度、HT63蒸汽压力对劲头贡献率较大;热风风门开度和HT63蒸汽压力对浓度的贡献率较大;HT63蒸汽压力对细腻程度和刺激的贡献率较大;热风温度对干燥感的贡献率较大。

关键词：滚筒烘丝机工艺参数感官质量逐步回归均匀设计贡献率

Learning conditional photometric stereo with high-resolution features

在线全文

学校读者我要写书评

暂无评论

Computational Visual Media 2022年第1期8卷 105-118页

作者： Yakun Ju Yuxin Peng Muwei Jian feng gao Junyu dong Department of Computer Science and Technology Ocean University of ChinaQingdao 266100China Wangxuan Institute of Computer Technology Peking UniversityBeijing 100871China School of Computer Science and Technology Shandong University of Finance and EconomicsJinan 250002China

Photometric stereo aims to reconstruct 3D geometry by recovering the dense surface orientation of a 3D object from multiple images under differing *** methods normally adopt simplified reflectance models to make the surface orientation ***,the real reflectances of surfaces greatly limit applicability of such methods to real-world *** deep neural networks have been employed to handle non-Lambertian surfaces,these methods are subject to blurring and errors,especially in high-frequency regions(such as crinkles and edges),caused by spectral bias:neural networks favor low-frequency representations so exhibit a bias towards smooth *** this paper,therefore,we propose a self-learning conditional network with multiscale features for photometric stereo,avoiding blurred reconstruction in such *** explorations include:(i)a multi-scale feature fusion architecture,which keeps high-resolution representations and deep feature extraction,simultaneously,and(ii)an improved gradient-motivated conditionally parameterized convolution(GM-CondConv)in our photometric stereo network,with different combinations of convolution kernels for varying *** experiments on public benchmark datasets show that our calibrated photometric stereo method outperforms the state-of-the-art.

关键词： photometric stereo normal estimation deep neural networks 3D reconstruction

Multistimuli Responsive and Thermoregulated Capability of Coaxial Electrospun Membranes with Core-sheath Structure and Functional Polypyrrole Layer

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Polymer Science 2022年第11期40卷 1380-1388页

作者： Meng-Hang gao Wen feng Xiao-dong Qi Yong Wang Key Laboratory of Advanced Technologies of Materials(Ministry of Education) School of Materials Science&EngineeringSouthwest Jiaotong UniversityChengdu610031China

Developing thermal management fabrics with good energy storage and multistimuli responsive properties is important for regulating the body temperature in complex ***,the intelligent nonwoven membranes were fabricated via a coaxial electrospinning method,resulting in a core-sheath structure with poly(ethylene glycol)(PEG)as core and polyurethane(PU)as ***,polypyrrole(PPy)with good light absorption ability and electrical conductivity was deposited onto the surface of the PU@PEG electrospun fibers via electrochemical *** PPy layer enabled the membranes to respond quickly to sunlight and electrical *** membranes could heat up to 86°C under simulated sunlight within 200 s or produce remarkable electrothermal effect under a low voltage input of only 1V,exhibiting efficient energy conversion and storage *** photothermal and electrothermal conversion effect could be easily adjusted by controlling the polymerization time of ***,the multifunctional membranes with high latent heat,good mechanical properties as well as excellent photothermal/electrothermal conversion ability are promising in personal thermal management applications.

关键词： Phase change materials Polypyrrole Coaxial electrospinning Photothermal conversion Electrothermal conversion

在线全文

学校读者我要写书评

暂无评论

碳化现象对微波膨胀烟梗质量影响的研究

食品工业 2017年第11期38卷 170-174页

作者：吴雨松和智君董高峰谢志强余贺龙殷沛沛云南中烟工业有限责任公司技术中心昆明650231 云南中烟新材料科技有限公司昆明650106

为探讨烟梗进行微波膨胀时碳化现象对微波膨胀烟梗质量的影响,系统研究了膨胀梗(碳化)颜色、内部组织结构、细胞壁物质、常规化学成分及致香成分与原梗和膨胀梗的差异,结果表明,微波膨胀后,烟梗薄壁组织内形成大量的孔隙,而腔道组织并... 详细信息

为探讨烟梗进行微波膨胀时碳化现象对微波膨胀烟梗质量的影响,系统研究了膨胀梗(碳化)颜色、内部组织结构、细胞壁物质、常规化学成分及致香成分与原梗和膨胀梗的差异,结果表明,微波膨胀后,烟梗薄壁组织内形成大量的孔隙,而腔道组织并没有明显变化,膨胀梗(碳化)与膨胀梗在组织结构上没有明显差异;膨胀梗(碳化)在颜色指标上与原梗和膨胀梗均存在极显著差异(p<0.01);原梗、膨胀梗和膨胀梗(碳化)中细胞壁物质和常规化学成分含量均有差异;在膨胀梗(碳化)致香物质中,由美拉德反应所产生的致香物质含量过高可能是膨胀梗(碳化)品质较差的原因。

关键词：微波膨胀烟梗碳化现象

Multiple Tin Compounds Modified Carbon Fibers to Construct Heterogeneous Interfaces for Corrosion Prevention and Electromagnetic Wave Absorption

在线全文

学校读者我要写书评

暂无评论

Nano-Micro Letters 2025年第1期17卷 507-527页

作者： Zhiqiang Guo Di Lan Zirui Jia Zhenguo gao Xuetao Shi Mukun He Hua Guo Guanglei Wu Pengfei Yin College of Science Sichuan Agricultural UniversityYa’an 625014People’s Republic of China School of Materials Science and Engineering Hubei University of Automotive TechnologyShiyan 442002People’s Republic of China Institute of Materials for Energy and Environment State Key Laboratory of Bio‑Fibers and Eco‑TextilesCollege of Materials Science and EngineeringQingdao UniversityQingdao 266071People’s Republic of China Shaanxi Key Laboratory of Macromolecular Science and Technology School of Chemistry and Chemical EngineeringNorthwestern Polytechnical UniversityXi’anShaanxi 710072People’s Republic of China

Currently,the demand for electromagnetic wave(EMW)absorbing materials with specific functions and capable of withstanding harsh environments is becoming increasingly ***-component interface engineering is considered an effective means to achieve high-efficiency EMW ***,interface modulation engineering has not been fully discussed and has great potential in the field of EMW *** this study,multi-component tin compound fiber composites based on carbon fiber(CF)substrate were prepared by electrospinning,hydrothermal synthesis,and high-temperature thermal *** utilizing the different properties of different substances,rich heterogeneous interfaces are *** effectively promotes charge transfer and enhances interfacial polarization and conduction *** prepared SnS/SnS_(2)/SnO_(2)/CF composites with abundant heterogeneous interfaces have and exhibit excellent EMW absorption properties at a loading of 50 wt%in epoxy *** minimum reflection loss(RL)is−46.74 dB and the maximum effective absorption bandwidth is 5.28 ***,SnS/SnS_(2)/SnO_(2)/CF epoxy composite coatings exhibited long-term corrosion resistance on Q235 steel ***,this study provides an effective strategy for the design of high-efficiency EMW absorbing materials in complex and harsh environments.

关键词： Electrostatic spinning Component regulation Heterogeneous interfaces Electromagnetic wave absorption Corrosion protection

Low‑Temperature Oxidation Induced Phase Evolution with Gradient Magnetic Heterointerfaces for Superior Electromagnetic Wave Absorption

在线全文

学校读者我要写书评

暂无评论

Nano-Micro Letters 2025年第1期17卷 191-204页

作者： Zizhuang He Lingzi Shi Ran Sun Lianfei Ding Mukun He Jiaming Li Hua Guo Tiande gao Panbo Liu School of Chemistry and Chemical Engineering Northwestern Polytechnical UniversityXi’an 710129People’s Republic of China School of Marine Science and Technology Northwestern Polytechnical UniversityXi’an 710072People’s Republic of China

Gradient magnetic heterointerfaces have injected infinite vitality in optimizing impedance matching,adjusting dielectric/magnetic resonance and promoting electromagnetic(EM)wave absorption,but still exist a significant challenging in regulating local phase ***,accordion-shaped Co/Co_(3)O_(4)@N-doped carbon nanosheets(Co/Co_(3)O_(4)@NC)with gradient magnetic heterointerfaces have been fabricated via the cooperative high-temperature carbonization and lowtemperature oxidation *** results indicate that the surface epitaxial growth of crystal Co_(3)O_(4) domains on local Co nanoparticles realizes the adjustment of magnetic-heteroatomic components,which are beneficial for optimizing impedance matching and interfacial ***,gradient magnetic heterointerfaces simultaneously realize magnetic coupling,and long-range magnetic ***,the synthesized Co/Co_(3)O_(4)@NC absorbents display the strong electromagnetic wave attenuation capability of−53.5 dB at a thickness of 3.0 mm with an effective absorption bandwidth of 5.36 GHz,both are superior to those of single magnetic domains embedded in carbon *** design concept provides us an inspiration in optimizing interfacial polarization,regulating magnetic coupling and promoting electromagnetic wave absorption.

关键词： Magnetic heterointerfaces Phase evolution Interfacial polarization Magnetic coupling Electromagnetic wave absorption