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Science China(technological Sciences) 2024年第1期67卷 330-334页

作者： ZHANG DanTong QIAN BinBin XUE DongFeng Multiscale Crystal Materials Research Center Shenzhen Institute of Advanced TechnologyChinese Academy of SciencesShenzhen 518055China

Near-surface cluster active centers(NSCAC)are pivotal functional units in the catalysis of oxygen evolution reaction(OER),which exceeds the limitations imposed by the diverse coordination environments experienced in atomic and molecular active centers,thereby serving as an exceptional medium for exploring the dynamic catalytic processes of metal active sites[1,2].In the OER,the NSCAC primarily consist of the catalytic site and the first neighboring coordinating *** investigation of NSCAC surpasses the exclusive reliance on the electron state regulation mechanism at the atomic level.

关键词： cluster centers exceptional

Autonomous flight control with different strategies applied during the complete flight cycle for flapping-wing flying robots

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Science China(technological Sciences) 2023年第11期66卷 3343-3354页

作者： ZHONG SiPing WANG Song XU WenFu LIU JunTao PAN ErZhen School of Mechanical Engineering and Automation Harbin Institute of TechnologyShenzhenShenzhen 518005China

Flapping-wing flying robots(FWFRs),especially large-scale robots,have unique advantages in flight efficiency,load capacity,and bionic ***,they have significant potential in environmental detection,disaster rescue,and anti-terrorism explosion ***,at present,most FWFRs are operated *** have a certain autonomous ability limited to the cruise stage but not the complete flight *** factors make an FWFR unable to give full play to the advantages of flapping-wing flight to perform autonomous flight *** paper proposed an autonomous flight control method for FWFRs covering the complete process,including the takeoff,cruise,and landing ***,the flight characteristics of the mechanical structure of the robot are ***,dedicated control strategies are designed following the different control requirements of the defined ***,a hybrid control law is presented by combining different control strategies and ***,the proposed method and system are validated through outdoor flight experiments of the HIT-Hawk with a wingspan of 2.3 m,in which the control algorithm is integrated with an onboard embedded *** experimental results show that this robot can fly autonomously during the complete flight *** mean value and root mean square(RMS)of the control error are less than 0.8409 and 3.054 m,respectively,when it flies around a circle in an annular area with a radius of 25 m and a width of 10 m.

关键词： flapping-wing flying robot autonomous flight attitude and position control outdoor flight experiments

Development of a cable-driven redundant space manipulator with large bending angle by combining quaternion joints and segmented coupled linkages mechanism

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Chinese Journal of Aeronautics 2023年第11期36卷 483-499页

作者： Taiwei YANG Jian HUANG Wenfu XU Ke SHAO Bin LIANG School of Mechanical Engineering and Automation Harbin Institute of TechnologyShenzhen 518055China State Key Laboratory of Robotics and System Harbin Institute of TechnologyHarbin 150001China Department of Automation Tsinghua UniversityBeijing 100854China

A cable-driven redundant manipulator has significant potential in confined space applications, such as environmental exploration, equipment monitoring, or maintenance. A traditional design requires 3N driving motors/cables to supply 2N degrees of freedom(DOF) movement *** number of motors is 1.5 times that of the joints’ DOF, increasing the hardware cost and the complexity of the kinematics, dynamics, and control. This study develops a novel redundant space manipulator with decoupled cable-driven joints and segmented linkages. It is a 1680 mm continuum manipulator with eight DOF, consisting of four segmented linkages driven by eight motors/pairs of cables. Each segment has two equivalent DOF, which are realized by four quaternion joints synchronously driven by two linkage cables. The linkage cables of adjacent joints are symmetrically decoupled and offset at 180°. This design allows equal-angle movement of all the joints of each segment. Moreover, each decoupling driving mechanism is designed based on a pulley block composed of two fixed and movable pulleys. The two movable pulleys realize the opposite but equidistant motions of the two driving cables, i.e., pulling and loosening, assuring symmetrical movements of the two driving cables of each segment. Consequently, the equivalent 2N-DOF joints are driven only by 2N motors, significantly reducing the hardware cost and simplifying the mapping relationship between the motor angle/cable length and the joint angle. Furthermore, the bending range of each segment could reach 360°, which is three times that of a traditional design. Finally, a prototype has been developed and experimented with to verify the performance of the proposed mechanism and the corresponding algorithms.

关键词： Cable-driven Mechanism design Redundant manipulators Segmented linkages Kinematics

Autonomous Formation Flight Control of Large-Sized Flapping-Wing Flying Robots Based on Leader–Follower Strategy

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Journal of Bionic Engineering 2023年第6期20卷 2542-2558页

作者： Hui Xu Yuanpeng Wang Erzhen Pan Wenfu Xu Dong Xue School of Mechanical Engineering and Automation Harbin Instwitute of TechnologyShenzhen518055China State Key Laboratory of Robotics and System Harbin Institute of TechnologyHarbin150000China School of Aeronautics Northwestern Polytechnical UniversityXi’an710072China

Birds in nature exhibit excellent long-distance flight capabilities through formation flight,which could reduce energy consumption and improve flight *** by the biological habits of birds,this paper proposes an autonomous formation flight control method for Large-sized Flapping-Wing Flying Robots(LFWFRs),which can enhance their search range and flight ***,the kinematics model for LFWFRs is ***,an autonomous flight controller based on this model is designed,which has multiple flight control modes,including attitude stabilization,course keeping,hovering,and so ***,a formation flight control method is proposed based on the leader–follower strategy and periodic characteristics of flapping-wing *** up and down fluctuation of the fuselage of each LFWFR during wing flapping is considered in the control algorithm to keep the relative distance,which overcomes the trajectory divergence caused by sensor delay and fuselage ***,typical formation flight modes are realized,including straight formation,circular formation,and switching ***,the outdoor formation flight experiment is carried out,and the proposed autonomous formation flight control method is verified in real environment.

关键词： Bionic Large-sized flapping-wing flying robot HIT-Phoenix Periodic flight characteristics Formation flight Leader follower strategy

Fast and flexible stack‐based inverse tone mapping

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CAAI Transactions on Intelligence Technology 2023年第4期8卷 1444-1454页

作者： Ning Zhang Yuyao Ye Yang Zhao Xufeng Li Ronggang Wang School of Electronic and Computer Engineering Peking University Shenzhen Graduate SchoolShenzhenChina School of Computer and Information Hefei University of TechnologyHefeiChina Department of Computer Science(CS) College of Engineering(EG)City University of Hong KongHong KongChina

Inverse tone mapping technique is widely used to restore the lost textures from a single low dynamic range ***,many stack‐based deep inverse tone mapping networks have achieved impressive results by estimating a set of multi‐exposure images from a single low dynamic range ***,there are still some *** the one hand,these methods usually set a fixed length for the estimated multi‐exposure stack,which may introduce computational redundancy or cause inaccurate *** the other hand,they neglect that the difficulties of estimating each exposure value are different and use the identical model to increase or decrease exposure *** solve these problems,the authors design an exposure decision network to adaptively determine the number of times the exposure of low dynamic range input should be increased or ***,the authors decouple the increasing/decreasing process into two sub‐modules,exposure adjustment and optional detail recovery,based on the characteristics of different variations of exposure *** these improvements,this method can fast and flexibly estimate the multi‐exposure stack from a single low dynamic range *** on several datasets demonstrate the advantages of the proposed method compared to state‐of‐the‐art inverse tone mapping methods.

关键词： 2‐D image enhancement image processing

Roadmap for rechargeable batteries:present and beyond

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Science China Chemistry 2024年第1期67卷 13-42页

作者： Sen Xin Xu Zhang Lin Wang Haijun Yu Xin Chang Yu-Ming Zhao Qinghai Meng Pan Xu Chen-Zi Zhao Jiahang Chen Huichao Lu Xirui Kong Jiulin Wang Kai Chen Gang Huang Xinbo Zhang Yu Su Yao Xiao Shu-Lei Chou Shilin Zhang Zaiping Guo Aobing Du Guanglei Cui Gaojing Yang Qing Zhao Liubing Dong Dong Zhou Feiyu Kang Hu Hong Chunyi Zhi Zhizhang Yuan Xianfeng Li Yifei Mo Yizhou Zhu Dongfang Yu Xincheng Lei Jianxiong Zhao Jiayi Wang Dong Su Yu-Guo Guo Qiang Zhang Jun Chen Li-Jun Wan CAS Key Laboratory of Molecular Nanostructure and Nanotechnology CAS Research/Education Center for Excellence in Molecular SciencesBeijing National Laboratory for Molecular Sciences(BNLMS)Institute of ChemistryChinese Academy of Sciences(CAS)Beijing 100190China University of Chinese Academy of Sciences.Beijing 100049 China Institute of Advanced Battery Materials and Devices Faculty of Materials and ManufacturingBeijing University of TechnologyBeijing 100124China Key Laboratory of Advanced Functional Materials Ministry of EducationBeijing University of TechnologyBeijing 100124China Beijing Key Laboratory of Green Chemical Reaction Engineering and Technology Department of Chemical EngineeringTsinghua UniversityBeijing 100084China State Key Laboratory of Chemistry and Utilization of Carbon-Based Energy Resources College of ChemistryXinjiang UniversityUrumqi 830046China Department of Chemical Engineering Shanghai Jiao Tong UniversityShanghai 200240China State Key Laboratory of Rare Earth Resource Utilization Changchun Institute of Applied ChemistryChangchun 130022China Institute for Carbon Neutralization College of Chemistry and Materials EngineeringWenzhou UniversityWenzhou 325035China School of Chemical Engineering and Advanced Materials The University of AdelaideAdelaide 5000Australia Qingdao Industrial Energy Storage Research Institute Qingdao Institute of Bioenergy and Bioprocess TechnologyChinese Academy of SciencesQingdao 266101China Frontiers Science Center for New Organic Matter Key Laboratory of Advanced Energy Materials Chemistry(Ministry of Education)College of ChemistryNankai UniversityTianjin 300071China College of Chemistry and Materials Science Jinan UniversityGuangzhou 511443China Tsinghua shenzhen International Graduate School Tsinghua UniversityShenzhen 518055China Department of Materials Science and Engineering City University of Hong KongHong Kong 999077China Division of Energy Storage Dalian National Laboratory for Clean Energy(DNL)Dalian Institute of Chem

Rechargeable batteries currently hold the largest share of the electrochemical energy storage market,and they play a major role in the sustainable energy transition and industrial decarbonization to respond to global climate *** to the increased popularity of consumer electronics and electric vehicles,lithium-ion batteries have quickly become the most successful rechargeable batteries in the past three decades,yet growing demands in diversified application scenarios call for new types of rechargeable *** efforts are made to developing the next-generation post-Li-ion rechargeable batteries,which include,but are not limited to solid-state batteries,lithium–sulfur batteries,sodium-/potassium-ion batteries,organic batteries,magnesium-/zinc-ion batteries,aqueous batteries and flow *** the great achievements,challenges persist in precise understandings about the electrochemical reaction and charge transfer process,and optimal design of key materials and interfaces in a *** roadmap tends to provide an overview about the current research progress,key challenges and future prospects of various types of rechargeable *** computational methods for materials development,and characterization techniques will also be discussed as they play an important role in battery research.

关键词： energy storage rechargeable batteries battery materials electrochemistry

Neural network-based surrogate model for inverse design of metasurfaces

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Photonics Research 2022年第6期10卷 1462-1471页

作者： GUOQING JING PEIPEI WANG HAISHENG WU JIANJUN REN ZHIQIANG XIE JUNMIN LIU HUAPENG YE YING LI DIANYUAN FAN SHUQING CHEN International Collaborative Laboratory of 2D Materials for Optoelectronics Science and Technology Institute of Microscale OptoelectronicsShenzhen UniversityShenzhen 518060China College of New Materials and New Energies Shenzhen Technology UniversityShenzhen 518118China Guangdong Provincial Key Laboratory of Optical Information Materials and Technology and Institute of Electronic Paper Displays South China Academy of Advanced OptoelectronicsSouth China Normal UniversityGuangzhou 510006China

Metasurfaces composed of spatially arranged ultrathin subwavelength elements are promising photonic devices for manipulating optical wavefronts,with potential applications in holography,metalens,and multiplexing *** microstructures that meet light modulation requirements is always a challenge in designing metasurfaces,where parameter sweep,gradient-based inverse design,and topology optimization are the most commonly used design methods in which the massive electromagnetic iterations require the design computational cost and are sometimes ***,we propose a fast inverse design method that combines a physicsbased neural network surrogate model(NNSM)with an optimization *** NNSM,which can generate an accurate electromagnetic response from the geometric topologies of the meta-atoms,is constructed for electromagnetic iterations,and the optimization algorithm is used to search for the on-demand meta-atoms from the phase library established by the NNSM to realize an inverse *** method addresses two important problems in metasurface design:fast and accurate electromagnetic wave phase prediction and inverse design through a single phase-shift *** a proof-of-concept,we designed an orbital angular momentum(de)multiplexer based on a phase-type metasurface,and 200 Gbit/s quadrature-phase shift-keying signals were successfully transmitted with a bit error rate approaching 1.67×10^(-6).Because the design is mainly based on an optimization algorithm,it can address the“one-to-many”inverse problem in other micro/nano devices such as integrated photonic circuits,waveguides,and nano-antennas.

关键词： network inverse optimization

Structural Characterization and Biological Activity of Oligopeptides from Isochrysis zhanjiangensis:Based on Quantum Mechanics,Molecular Docking and in Vitro Experiments

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Journal of Ocean University of China 2023年第4期22卷 1139-1150页

作者： LIN Liyuan LI Huijuan HONG Pengzhi ZHOU Chunxia SUN Shengli QIAN Zhongji School of Chemistry and Environment Colleage of Food Science and TechnologyShenzhen Institute of Guangdong Ocean UniversityGuangdong Ocean UniversityZhanjiang 524088China Southern Marine Science and Engineering Guangdong Laboratory Zhanjiang 524088China

DAPTMGY(DTY)is an oligopeptide derived from marine microalgae with proven potential to combat oxidative stress in previous *** composition,ordering,and active sites of amino acids play a key role in activity studies and are also the research trends in recent *** an oligopeptide with a molecular weight of less than 1000 Da,DTY is of great significance to explore the active site and structure-activity *** study used quantum mechanics to optimize DTY’s structure and predict the active site through molecular orbits,energy,and *** addition,an LPS-treated HUVEC cell was established as an oxidative-stress *** could reduce mitochondrial oxidative stress and inhibit ROS production by enhancing the antioxidant enzymes SOD,GPX,and ***,it was confirmed to inhibit inflammation and apoptosis through the NF-κB and MAPK signaling ***,the correlation of the oligopeptide DTY’s active site and antioxidative-stress activity was verified by molecular docking,showing that hydrogen bonding is the main force,which was also the main factor for antioxidant activity.

关键词： oligopeptide structure-activity relationship active site oxidative stress HUVEC

Cellular vesicles expressing PD-1-blocking scFv reinvigorate T cell immunity against cancer

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Nano Research 2022年第6期15卷 5295-5304页

作者： Tianyuan Xue Zhirang Zhang Tianliang Fang Baoqi Li Yuan Li Liyan Li Yanghua Jiang Fangfang Duan Fanqiang Meng Xin Liang Xudong Zhang Department of Pharmacology Molecular Cancer Research CenterSchool of MedicineShenzhen Campus of Sun Yat-sen UniversitySun Yat-sen UniversityShenzhen 518107China Guangdong Provincial Key Laboratory of Medical Molecular Diagnostics Key Laboratory of Stem Cell and Regenerative Tissue EngineeringSchool of Basic Medical SciencesGuangdong Medical UniversityDongguan 523808China The First People’s Hospital of Chenzhou Chenzhou 423000China

Cancer cells aberrantly express immunosuppressive checkpoint ligands and produce certain metabolites that lead to T cell *** checkpoint blockade(ICB)therapy that reinvigorates exhausted T cells have achieved impressive response in clinical cancer ***,the limited clinical response rate and off-tumor toxicities restrict ICB ***,cellular vesicles displaying anti-programmed cell death-1(PD-1)single-chain variable fragment antibody(aPD-1-scFv)were prepared to reinvigorate T cell immunity to counteract *** nanovesicles displaying aPD-1-scFv(aPD-1-scFv NVs)could enhance the anti-tumor activation of T cells through PD-1 ***,NVs loading the A_(2a)adenosine receptor(A_(2a)R)antagonist CPI-444 assisted T cells to antagonize adenosine,an immunosuppressive metabolite produced by cancer ***,CPI-444 loaded aPD-1-scFv NVs could intensively increase the density and activity of tumor infiltrating T cells,directly restraining tumor progress and metastasis.

关键词： drug delivery A_(2a)receptor PD-1 receptor cancer immunotherapy

Biopolymer-Based Aerogels for Electromagnetic Wave Shielding and Absorbing

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Chinese Journal of Chemistry 2023年第3期41卷 322-334页

作者： Mingrui Han Runa Zhang Qilei Wu Na Wu Jiurong Liu Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials Ministry of Education and School of Materials Science and EngineeringShandong UniversityJinanShandong250061 China Science and Technology on Electromagnetic Compatibility Laboratory China Ship Development and Design CentreWuhanHubei430064 China Department of Chemistry and Applied Biosciences ETH ZurichCH-8093 ZurichSwitzerland

The rapid development of communication technology and electronic industry has brought unprecedented serious electromagnetic interference(EMI)and electromagnetic wave(EMW)*** EMI shields and EMW absorbers based on metal or magnetic materials were used to solve these problems,they have long been criticized for their high price,high density and easy *** order to achieve low density and efficient dissipation of electromagnetic energy,aerogels stand out among manifold ***,constructing aerogels with good EMI shielding or EMW absorption performance and acceptable mechanical properties is not an easy *** biopolymers,such as cellulose,lignin,chitin/chitosan and alginate,breathe new life into aerogels for high-efficiency EMW shielding and ***,we reviewed the contributions of biopolymers in the fields of aerogels for EMW shielding and *** the same time,some challenges and outlook were also pointed out,aiming to promote the advance of aerogel-based EMI shields and EMW absorbers as well as the rational utilization of biopolymers.

关键词： Polymers Sustainable chemistry Electromagnetic interference(EMI)shielding Electromagnetic wave(EMW)absorbing Biomass Aerogels Biopolymers