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Nano Research 2025年第1期18卷 164-172页

作者： Yuanlin Fu Xiaoting Yang Ya Yu Kang Zhou Xiaoyang Ye Aoxiang Zhang Xiaojiao Hou Bingbing Chen Fuqiang Fan yuhang li Yu Fu Department of Chemistry College of SciencesNortheastern UniversityShenyang 110819China Department of Physical Education Shen Yang Institute of Science and TechnologyShenyang 110167China Sungrow Power Supply Co. Ltd.Hefei 230088China

The electrochemical nitrate reduction reaction(eNO_(3)^(-)RR)is considered an effective approach for converting nitrate-containing wastewater to *** adsorption and activation of NO_(3)^(-)is the critical step for many materials and the high energy barrier inhibits the continuation of the reduction *** Co nanoparticles encapsulated in the carbon layer we prepared spontaneously react with NO_(3)^(-)and the resulting Co^(2+)is then reduced by electroreduction to Co^(0),which circulates *** resulted in overcoming the energy input required for NO_(3)^(-)adsorption and conversion,thereby increasing the catalytic *** the same time,the morphology of the catalyst reconstructed from a dodecahedron to an interwoven nanosheet structure and the increased surface area also gives it better *** obtained Co(OH)_(2)@Co-N-C has an excellent eNO_(3)^(-)RR of 2774.7μg·h^(-1)·cm^(-2)with a Faraday efficiency of 81.4%in neutral *** the same time,the material-modified electrode can run stably for more than 100 *** work provides a new idea for the design of Co-based catalysts for eNO_(3)^(-)RR.

关键词： electrochemical nitrate reduction reaction Co-based catalyst dynamic evolution of Co species morphological reconstruction

Nonlinear encoding in diffractive information processing using linear optical materials

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light(Science & Applications) 2024年第8期13卷 1675-1688页

作者： yuhang li Jingxi li Aydogan Ozcan Electrical&Computer Engineering Department University of CaliforniaLos AngelesCA 90095USA Bioengineering Department University of CaliforniaLos AngelesCA 90095USA California NanoSystems Institute(CNSI) University of CaliforniaLos AngelesCA 90095USA

Nonlinear encoding of optical information can be achieved using various forms of data ***,we analyze the performances of different nonlinear information encoding strategies that can be employed in diffractive optical processors based on linear materials and shed light on their utility and performance gaps compared to the state-of-the-art digital deep neural *** a comprehensive evaluation,we used different datasets to compare the statistical inference performance of simpler-to-implement nonlinear encoding strategies that involve,e.g.,phase encoding,against data repetition-based nonlinear encoding *** show that data repetition within a diffractive volume(e.g.,through an optical cavity or cascaded introduction of the input data)causes the loss of the universal linear transformation capability of a diffractive optical ***,data repetition-based diffractive blocks cannot provide optical analogs to fully connected or convolutional layers commonly employed in digital neural ***,they can still be effectively trained for specific inference tasks and achieve enhanced accuracy,benefiting from the nonlinear encoding of the input *** results also reveal that phase encoding of input information without data repetition provides a simpler nonlinear encoding strategy with comparable statistical inference accuracy to data repetition-based diffractive *** analyses and conclusions would be of broad interest to explore the push-pull relationship between linear material-based diffractive optical systems and nonlinear encoding strategies in visual information processors.

关键词： nonlinear simpler Nonlinear

Metal-free carbocatalysis for electrochemical oxygen reduction reaction: Activity origin and mechanism

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Journal of Energy Chemistry 2020年第9期29卷 308-321,I0010页

作者： yuhang li Yexiang Tong Feng Peng School of Chemistry and Chemical Engineering Guangzhou UniversityGuangzhou 510006GuangdongChina School of Chemistry Sun Yat-sen UniversityGuangzhou 510275GuangdongChina

Although scientists have conducted long-term and extensive studies on oxygen reduction reaction(ORR)catalyzed by metal-free carbon materials,they mainly have focused on the preparation and properties of various doped carbon *** is still a lack of systematic scientific guidance on the relationship between the surface structure regulation and activity of carbon-based *** this review,some of electrochemical and computational fundamental concepts about ORR are concisely *** effects of edge defect and nonmetallic doping of carbon materials on ORR behavior and mechanism have been reviewed,and activity origin identification and intermediate conversion mechanism have been *** outlooks for future researches on metal-free ORR electrocatalysis are suggested.

关键词： Carbocatalysis Electrocatalysis Oxygen reduction reaction Review Metal-free doping

The origins of catalytic selectivity for the electrochemical conversion of carbon dioxide to methanol

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Nano Research 2024年第1期17卷 5-17页

作者： Tian Wang Yating Wang yuhang li Chunzhong li Key Laboratory for Ultrafine Materials of Ministry of Education Shanghai Engineering Research Center of Hierarchical NanomaterialsFrontiers Science Center for Materiobiology and Dynamic ChemistrySchool of Materials Science and EngineeringEast China University of Science&TechnologyShanghai 200237China School of Chemical Engineering East China University of Science&TechnologyShanghai 200237China

The electrocatalytic conversion of carbon dioxide(CO_(2))into useful fuels and chemical feedstocks is an emerging route to alleviate global warming and reduce reliance on fossil ***(CH_(3)OH),as one of the most significant and widely used liquid fuels that can be generated by CO_(2)reduction,is essential in the chemical *** this minireview,we unravel the origins of the selective formation of CH_(3)OH via CO_(2)reduction,including catalyst composition designs,local structure modulations,and electrolyte/catalyst interface ***,the remaining challenges and perspectives for the CO_(2)-to-CH_(3)OH reduction are proposed.

关键词： methanol carbon dioxide(CO_(2))reduction reaction electrochemistry electrocatalyst catalyst-electrolyte interface

High-throughput terahertz imaging:progress and challenges

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light(Science & Applications) 2023年第10期12卷 2053-2073页

作者： Xurong li Jingxi li yuhang li Aydogan Ozcan Mona Jarrahi Department of Electrical&Computer Engineering University of California Los Angeles(UCLA)Los AngelesCA90095USA California NanoSystems Institute(CNSI) University of California Los Angeles(UCLA)Los AngelesCA 90095USA Department of Bioengineering University of California Los Angeles(UCLA)Los AngelesCA 90095USA

Many exciting terahertz imaging applications,such as non-destructive evaluation,biomedical diagnosis,and security screening,have been historically limited in practical usage due to the raster-scanning requirement of imaging systems,which impose very low imaging ***,recent advancements in terahertz imaging systems have greatly increased the imaging throughput and brought the promising potential of terahertz radiation from research laboratories closer to real-world ***,we review the development of terahertz imaging technologies from both hardware and computational imaging *** introduce and compare different types of hardware enabling frequency-domain and time-domain imaging using various thermal,photon,and field image sensor *** discuss how different imaging hardware and computational imaging algorithms provide opportunities for capturing time-of-flight,spectroscopic,phase,and intensity image data at high ***,the new prospects and challenges for the development of future high-throughput terahertz imaging systems are briefly introduced.

关键词： hardware closer terahertz

Ultrafine microstructure development in laser polishing of selective laser melted Ti alloy

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Journal of Materials Science & Technology 2021年第24期83卷 1-6页

作者： yuhang li Xu Cheng Yingchun Guan School of Mechanical Engineering and Automation Beihang UniversityBeijing100191China National Engineering Laboratory of Additive Manufacturing for Large Metallic Components Beihang UniversityBeijing100191China School of Materials Science and Engineering Beihang UniversityBeijing100191China School of Mechanical Engineering and Automation Beihang UniversityBeijing100083China National Engineering Laboratory of Additive Manufacturing for Large Metallic Components Beihang UniversityBeijing100083China International Research Institute for Multidisciplinary Science Beihang UniversityBeijing100083China

*** Titanium(Ti)alloys have been widely used in aerospace[1],biomedical industries[2],marine and offshore[3],due to their high yield strength,low density,good biocompatibility and outstanding corrosion resistance[4-6].Compared with traditional material processing methods,such as forging[7],stamping[8]and casting[9],additive manufacturing(AM)has attracted much attention to produce complex components close to their final prototypes with the formation of an ultrafine eutectoid microstructure caused by high cooling rates under multiple thermal cycles[2].

关键词： microstructure alloy corrosion

Residual Vibration Reduction of High-Speed Pick-and-Place Parallel Robot Using Input Shaping

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Chinese Journal of Mechanical Engineering 2022年第1期35卷 62-69页

作者： Xianlei Shan yuhang li Haitao liu Tian Huang Key Laboratory of Mechanism Theory and Equipment Design of Ministry of Education Tianjin UniversityTianjin 300354China School of Engineering The University of WarwickCoventry CV47ALUK.

Because of their elastic links and joints,high-speed parallel robots for pick-and-place operations inevitably suffer from residual vibrations that significantly degrade their positioning *** effective approach based on the input shaping technique is presented in this paper for suppressing the residual vibration in these parallel *** addressing the design principle of an input shaper for a parallel robot with flexible actuated joints,a robust optimal input shaper is developed by considering the configuration-dependent flexible modes and minimizing the maximum percentage of residual vibration at the *** input shaper allows a good overall performance to be achieved throughout the entire *** results on a 4-DOF SCARA-type parallel robot show that the residual vibration of the end-effector is dramatically reduced and the dynamic positioning accuracy of the robot significantly improved.

关键词： Pick-and-place parallel robot Residual vibration reduction Input shaping

Morphology and molecular phylogeny of Pleurosira nanjiensis sp. nov., a new marine benthic diatom from the Nanji Islands, China

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Acta Oceanologica Sinica 2018年第10期37卷 33-39页

作者： li yuhang NAGUMO Tamotsu XU Kuidong Department of Marine Organism Taxonomy and Phylogeny Institute of Oceanology Chinese Academy of Sciences Qingdao 266071 China Laboratory for Marine Biology and Biotechnology Pilot National Laboratory for Marine Science and Technology (Qingdao) Qingdao 266237 China Department of Biology School of Life Dentistry at Tokyo The Nippon Dental University Tokyo 102-8159 Japan University of Chinese Academy of Sciences Beijing 100049 China

A new marine benthic diatom, Pleurosira nanjiensis sp. nov., is described from the rocky intertidal zone of the Xiaochaiyu Island of the Nanji Islands in China. Its morphology was examined with light and scanning electron microscopy. Molecular phylogeny was reconstructed based on SSU rRNA and rbcL gene sequences. Pleurosira nanjiensis differs from congeners in possession of a combination of morphological features including the domed valve with broadly lanceolate, elliptical or circular valve outline, two elevated marginal ocelli, two （rarely three） rimportulae, and radiate striae.

关键词： Pleurosira nanjiensis rocky intertidal area marine diatom Nanji Islands new species

Application of three-dimensional electron diffraction in structure determination of zeolites

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Chinese Journal of Structural Chemistry 2024年第4期43卷 39-47页

作者： yuhang li Yang ling Yanhang Ma School of Physical Science and Technology&Shanghai Key Laboratory of High-resolution Electron Microscopy ShanghaiTech UniversityShanghai201210China

Zeolites have received great attention due to their wide applications in various fields such as catalysis,adsorp-tion/separation,ion exchange,*** the atomic crystal structure of zeolites is crucial to understanding their functions and exploring their *** to the difficulty of synthesizing large single crystals,the structures of many zeolites cannot be solved using conventional single-crystal X-ray diffraction(SCXRD)***-dimensional electron diffraction(3D ED)has witnessed rapid development during the past decade and has shown its powerful ability in the structure determination of *** this review,we will briefly introduce the history of 3D ED and summarize recent advances in the application of 3D ED for the analysis of zeolite structures,along with several typical examples in this research field.

关键词： Electron diffraction Three-dimensional electron diffraction Zeolite Structure solution Electron crystallography

Two new marine benthic diatom species of Hippodonta(Bacillariophyceae)from the coast of China:*** *** *** ***.

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Journal of Oceanology and limnology 2021年第3期39卷 1033-1041页

作者： yuhang li Zhongmin SUN Tamotsu NAGUMO Kuidong XU Laboratory of Marine Organism Taxonomy and Phylogeny Institute of OceanologyChinese Academy of SciencesQingdao 266071China Echigo Natural History Laboratory Kowada 719OjiyaNiigata 947-0041Japan Laboratory for Marine Biology and Biotechnology Pilot National Laboratory for Marine Science and Technology(Qingdao)Qingdao 266237China University of Chinese Academy of Sciences Beijing 100049China Center for Ocean Mega-Science Chinese Academy of SciencesQingdao 266071China

The diversity and distribution of Hippodonta species on the coast of China are largely unknown due to limited *** this paper,we report the detailed morphology and ultrastructure of two new species:*** ***.,collected from intertidal sandy sediments of Nanji Islands,the East China Sea and *** ***.,collected from intertidal sandy sediments of the No.1 Bathing Beach in Qingdao City,the Yellow *** species occur mainly in the middle part of the intertidal *** possesses a unique large round central *** differs from congeners in having a unique stria pattern,wherein the areolae in the middle transapical striae are less developed or absent on the primary side of the valve,and two areolae per stria are apparent under light microscopy(LM).This study expands our knowledge of Hippodonta diversity and distribution on the coast of China.

关键词： Hippodonta intertidal sediment new species Yellow Sea East China Sea