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Asia Communications and Photonics Conference and Exhibition (ACP)

作者： Zhongxing Tian Chenxu Jiang Xudong Chai Xiaozhou Wang Huan Huang Jun Zhou Yi Cai Jiangsu Hengxin Semitech Co. Ltd Suzhou China Suzhou Key Laboratory of Advanced Optical Communication Network Technology Soochow University Suzhou China

We propose a differential-detection receiver architecture and a novel recursive algorithm for electronic polarization tracking in polarization-division-multiplexed differential quadrature-phase-shift-keying (PDM-DQPSK) systems. Simulation results demonstrate that the proposed system approaches the performance of coherent-detection-based PDM-DQPSK systems.

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Sight View Constraint for Robust Point Cloud Registration

arXiv

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arXiv 2024年

作者： Zhang, Yaojie Wang, Weijun Huang, Tianlun Wang, Zhiyong Feng, Wei Shenzhen Institute of Advanced Technology Chinese Academy of Sciences Shenzhen518055 China University of Chinese Academy of Sciences Beijing100049 China Guangdong Provincial Key Laboratory of Construction Robotics and Intelligent Construction Shenzhen518055 China

Partial to Partial Point Cloud Registration (partial PCR) remains a challenging task, particularly when dealing with a low overlap rate. In comparison to the full-to-full registration task, we find that the objective of partial PCR is still not well-defined, indicating no metric can reliably identify the true transformation. We identify this as the most fundamental challenge in partial PCR tasks. In this paper, instead of directly seeking the optimal transformation, we propose a novel and general Sight View Constraint (SVC) to conclusively identify incorrect transformations, thereby enhancing the robustness of existing PCR methods. Extensive experiments validate the effectiveness of SVC on both indoor and outdoor scenes. On the challenging 3DLoMatch dataset, our approach increases the registration recall from 78% to 82%, achieving the state-of-the-art result. This research also highlights the significance of the decision version problem of partial PCR, which has the potential to provide novel insights into the partial PCR problem. © 2024, CC BY.

关键词： 3D modeling

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Unveiling the Impact of B-site Distribution on the Frustration Effect in Double Perovskite Ca2FeReO6 Using Monte Carlo Simulation and Molecular Field Theory

arXiv

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arXiv 2024年

作者： Liu, Guoqing Mo, Jiajun Lu, Zeyi Zhang, Qinghang Xia, Puyue Liu, Min College of Nuclear Science and Technology University of South China Hengyang421001 China Department of Physics University of Science and Technology of China Anhui Hefei230026 China Jiangsu Key Laboratory for Nanotechnology Collaborative Innovation Center of Advanced Microstructures Nanjing National Laboratory of Microstructures Department of Physics Nanjing University Jiangsu Nanjing210093 China

This work systematically investigates the spin glass behavior of the double perovskite Ca2FeReO6. Building on previous studies, we have developed a formula to quantify the ions distribution at B-site, incorporating the next-nearest neighbor interactions. Employing molecular field theory and Monte Carlo simulations, the influence of various arrangements of two B-site ions on frustration effects was uncovered. B-site is segmented into a and b-site, defining the number of nearest neighbors from Fea to Feb (and vice versa) as Zx(Zy). The significant frustration effects occur when 1x(or Zy)x≠Zy and also when Zx(or Zy) ~ 3 while Zy(or Zx) ~ 4. All of these are reflected in the variations observed in ground state magnetization and the Thermal Energy Step relation to Zx and Zy. The model proposed in this work can be applied to most B-site disordered in perovskite systems and even to other chemically disordered in frustrated systems. Copyright © 2024, The Authors. All rights reserved.

关键词： Monte Carlo methods

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TactCapsNet: Tactile capsule network for object hardness recognition

TactCapsNet: Tactile capsule network for object hardness rec...

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2021 IEEE International Conference on Real-Time Computing and robotics, RCAR 2021

作者： Fang, Senlin Mi, Tingting Zhou, Zhenning Ye, Chaoxiang Liu, Chengliang Wu, Hancheng Yi, Zhengkun Wu, Xinyu Shenzhen Institute of Advanced Technology CAS Key Laboratory of Human-Machine Intelligence-Synergy Systems Shenzhen518055 China Shenzhen Institute of Advanced Technology Chinese Academy of Sciences Guangdong Provincial Key Lab of Robotics and Intelligent System Shenzhen518055 China Shenzhen Key Laboratory of Smart Sensing and Intelligent Systems Shenzhen Institute of Advanced Technology Chinese Academy of Sciences Shenzhen518055 China SIAT Branch Shenzhen Institute of Artificial Intelligence and Robotics for Society Shenzhen518055 China

ISBN: (纸本)9781665436786

Hardness is one of the most essential tactile clues for robots to recognize objects. However, methods for robots to recognize hardness are limited. In this paper, based on the Capsule Network (CapsNet), we propose a novel tactile capsule network (TactCapsNet) for object hardness recognition. Specifically, we collect a tactile dataset on the silicone samples with three different shapes, and the silicone samples of each shape have thirteen hardness levels ranging from 0A (Shore A scale) to 60A at 5A intervals. Furthermore, we construct the tactile image as the input of the CapsNet to make full use of the spatio-temporal information of the tactile hardness dataset. The experimental results prove that the proposed approach achieves higher accuracy and quadratic weighted kappa (QWK) than support vector machine (SVM), long short-term memory (LSTM), convolutional neural network (CNN), and CapsNet. © 2021 IEEE.

关键词： Hardness

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APA-SLAM:Lightweight Mapping and Localization System for Autonomous Parking

APA-SLAM:Lightweight Mapping and Localization System for Aut...

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2023中国汽车工程学会年会暨展览会

作者： Yang Yang Liu Jianjian Du Kuishan Feng Wei BYD Auto Industry Company Limited Guangdong Provincial Key Laboratory of Construction Robotics and Intelligent Construction Shenzhen Institute of Advanced TechnologyChinese Academy of Sciences Guangdong Provincial International Joint Research Center for Robotics and Intelligent Construction Shenzhen Institute of Advanced TechnologyChinese Academy of Sciences University of Chinese Academy of Sciences

Autonomous driving was a significant technology that will improve traffic efficiency and vehicle safety in the future,Automatic parking assistance was one of the most mainstream autonomous driving functionalities currently installed in *** this paper,a lightweight Simultaneous Localization and Mapping method was proposed,relying on low-cost hardware including four fish-eye cameras and wheel ***,the images of the surrounding environment captured by the fish-eye cameras,and then the images were transformed into a bird' s-eye view using inverse perspective transformation,which expands the perception range of a single ***,a multi-task deep learning model was employed to detect parking spaces and free-space areas in the bird' s-eye ***,the vehicle trajectory was calculated using the wheel *** the back-end,optimization was performed by matching the trajectory with the detected parking spaces,and a free-space area map was obtained using Bayesian *** results verify that the average positioning error of the proposed APA-SLAM system was 2.75 cm,and the parking performance based on this system was also validated.

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Comparison of the Swing Arc Behavior and the Non-Swing Arc Behavior in Arc Ultrasonic Assisted Ng-Gmaw

SSRN

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SSRN 2023年

作者： Chen, Qihao Xie, Zhiyu Wang, Jiayou Lin, Sanbao Dou, Qin Huang, Tao College of Materials Science and Engineering Jiangsu University of Science and Technology Zhenjiang212100 China State Key Laboratory of Advanced Welding and Joining Harbin Institute of Technology Harbin150001 China

The arc ultrasonic technology is applied to the swing arc narrow gap GMA welding of aluminum alloy. The ultrasonic energy is generated and acts on the welding process by superimposing an ultrasonic current on basis of welding current. Due to the influence from the narrow gap groove constraint and the arc swing, the arc behavior will be significantly different from that in the conditions of non-narrow gap and non-swing after superposition of ultrasonic current. In this paper, the behavior of swing arc and non-swing arc at different positions in narrow gap groove are compared, and the influence mechanism of arc ultrasonic on arc behavior is analyzed. Results show that the arc expands after superposition of ultrasonic current, and the arc behavior is different at different positions of the narrow gap groove. At the sidewall, the expansion degree of non-swing arc is obviously greater than that of swing arc. The swing arc area increases by 50.33% at most and the non-swing arc area increases by 117.94% at most. In the groove bottom, the expansion degree of swing arc is greater than that of non-swing arc. The swing arc area increases by 31.02% at most and the non-swing arc increases by 11.77% at most. The average area and width of swing arc in groove are nonlinear relationships with ultrasonic current amplitude and linear positive correlation with ultrasonic frequency. The speed difference of arc expansion and contraction and the oscillation of arc plasma under the arc ultrasonic action together promote arc expansion. © 2023, The Authors. All rights reserved.

关键词： Expansion

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Triple-phase interfaces of graphene-like carbon clusters on antimony trisulfide nanowires enable high-loading and long-lasting liquid Li_(2)S_(6)-based lithium-sulfur batteries

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Journal of Energy Chemistry 2021年第8期30卷 599-607,I0013页

作者： Chenyang Zha Donghai Wu Xiuquan Gu Houyang Chen Key Laboratory of Flexible Electronics(KLOFE) Institute of Advanced Materials(IAM)Nanjing Tech UniversityNanjing 211816China Henan Key Laboratory of Nanocomposites and Applications Institute of Nanostructured Functional MaterialsHuanghe Science and Technology CollegeZhengzhou 450006China School of Materials and Physics China University of Mining and TechnologyXuzhou 221116JiangsuChina Department of Chemical and Biological Engineering State University of New York at Buffalo14260-4200 BuffaloUSA

High performance of lithium-sulfur batteries have been dragged down by their shuttling behavior which is complicated multiphase transition-based 16-electron redox reactions of the S8/Li2 *** this article,the triple-phase interfaces of graphene-like carbon clusters on antimony trisulfide(C-Sb_(2)S_(3))nanowires are tailored to design a multifunctional polysulfide host which can inhibit migration of polysulfides and accelerate conversion kinetics of redox electrochemical *** from the triple-interface design of polysulfides/Sb_(2)S_(3)/carbon clusters,the C-Sb_(2)S_(3) electrode not only anchors polysulfide migration by the synergistic effect of Sb,S,and C atoms as interfacial active sites,but also the graphene-like carbon clusters shorten the diffusion paths to further favor redox electron/ion transport through the liquid(electrolyte/polysulfide)and solid(Li2 S/S8,carbon clusters,and Sb_(2)S_(3))-based ***,these Li_(2)S_(6)-based C-Sb_(2)S_(3) cells possess high sulfur loading,excellent cycling stability,impressive specific capacity,and great rate *** work of interfacial engineering reveals insight for powering reaction kinetics in the complicated multistep catalysis reaction with multiphase evolution-based chargetransfer/non-transfer processes.

关键词： Triple-phase interfaces Graphene-like carbon Antimony trisulfide High preformance Lithium-sulfur batteries

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Catalytic conversion of lignocellulosic biomass into chemicals and fuels

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Green Energy & Environment 2023年第1期8卷 10-114页

作者： Weiping Deng Yunchao Feng Jie Fu Haiwei Guo Yong Guo Buxing Han Zhicheng Jiang Lingzhao Kong Changzhi Li Haichao Liu Phuc T.T.Nguyen Puning Ren Feng Wang Shuai Wang Yanqin Wang Ye Wang Sie Shing Wong Kai Yan Ning Yan Xiaofei Yang Yuanbao Zhang Zhanrong Zhang Xianhai Zeng Hui Zhou State Key Laboratory for Physical Chemistry of Solid Surfaces Collaborative Innovation Center of Chemistry for Energy MaterialsNational Engineering Laboratory for Green Chemical Productions of Alcohols-Ethers-Estersand College of Chemistry and Chemical EngineeringXiamen UniversityXiamen361005China Fujian Engineering and Research Center of Clean and High-valued Technologies for Biomass Xiamen Key Laboratory of High-valued Utilization of BiomassCollege of EnergyXiamen University361102China Key Laboratory of Biomass Chemical Engineering of Ministry of Education College of Chemical and Biological EngineeringZhejiang UniversityHangzhou310027China Institute of Zhejiang University-Quzhou 78 Jiuhua Boulevard NorthQuzhou324000China School of Energy and Environmental Engineering Hebei University of TechnologyTianjin300401China Shanghai Key Laboratory of Functional Materials Chemistry Research Institute of Industrial CatalysisSchool of Chemistry and Molecular EngineeringEast China University of Science and TechnologyShanghai200237China Beijing National Laboratory for Molecular Sciences CAS Key Laboratory of Colloid and Interface and ThermodynamicsCAS Research/Education Center for Excellence in Molecular SciencesInstitute of ChemistryChinese Academy of SciencesBeijing100190China Department of Biomass Science and Engineering Sichuan UniversityChengdu610065China CAS Key Laboratory of Low-carbon Conversion Science and Engineering Shanghai Advanced Research InstituteChinese Academy of SciencesShanghai201210China University of Chinese Academy of Sciences Beijing100049China CAS Key Laboratory of Science and Technology on Applied Catalysis Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian116023China Beijing National Laboratory for Molecular Sciences College of Chemistry and Molecular EngineeringPeking UniversityBeijing100871China Department of Chemical and Biomolecular Engineering National University of Singapore4 Engineering Drive 4Singapore117585Singapore Sta

In the search of alternative resources to make commodity chemicals and transportation fuels for a low carbon future,lignocellulosic biomass with over 180-billion-ton annual production rate has been identified as a promising *** review focuses on the state-of-the-art catalytic transformation of lignocellulosic biomass into value-added chemicals and *** a brief introduction on the structure,major resources and pretreatment methods of lignocellulosic biomass,the catalytic conversion of three main components,i.e.,cellulose,hemicellulose and lignin,into various compounds are comprehensively *** in separate steps or in one-pot,cellulose and hemicellulose are hydrolyzed into sugars and upgraded into oxygen-containing chemicals such as 5-HMF,furfural,polyols,and organic acids,or even nitrogen-containing chemicals such as amino *** the other hand,lignin is first depolymerized into phenols,catechols,guaiacols,aldehydes and ketones,and then further transformed into hydrocarbon fuels,bioplastic precursors and bioactive *** review then introduces the transformations of whole biomass via catalytic gasification,catalytic pyrolysis,as well as emerging ***,opportunities,challenges and prospective of woody biomass valorization are highlighted.

关键词： Lignocelullose Biomass Catalytic conversion Biofuels Renewable chemicals

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Regulation of surface carbides on palladium nanocubes with zeolitic imidazolate frameworks for propyne selective hydrogenation

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Nano Research 2021年第5期14卷 1559-1564页

作者： Linzhong Wu Mingyu Chu Jin Gong Muhan Cao Yu Liu Yong Xu Institute of Functional Nano&Soft Materials(FUNSOM) Jiangsu Key Laboratory for Carbon-Based Functional Materials and DevicesSoochow UniversityNo.199 Ren’ai RoadSuzhou215123China Guangzhou Key Laboratory of Low-Dimensional Materials and Energy Storage Devices Collaborative Innovation Center of Advanced Energy MaterialsSchool of Materials and EnergyGuangdong University of TechnologyGuangzhou510006China

The selective hydrogenation of propyne to propylene has attracted great attention in chemical industry for removing trace amount of propyne for producing polymer-grade propylene. As the state-of-the-art catalyst, Pd suffers from the disadvantage of poor propylene selectivity due to the over-hydrogenation of propylene to propane. We here demonstrate that Pd nanocubes (NCs) coated by zeolitic imidazolate frameworks (i.e., Pd NCs@ZIF-8) can serve as highly active and selective catalysts for propyne selective hydrogenation (PSH). Benefitting from the unique properties and abundant groups of ZIF-8, Pd carbide (Pd-C) is formed on the surface of Pd NCs after thermal treatment, which acts the active sites for PSH to propylene. More importantly, the content of Pd-C can be precisely controlled by altering the calcination temperature without aggregation of Pd NCs and obvious changes in the framework of ZIF-8. The formation of Pd-C on Pd NCs@ZIF-8 can strongly suppress the H2 adsorption, and thus selectively catalyze propyne to propylene. Consequently, the optimized catalyst (i.e., Pd NCs@ZIF-8-100) exhibits a propylene selectivity of 96.4% at a propyne conversion of 93.3% at 35 °C and atmospheric pressure. This work may not only provide an efficient catalyst for PSH, but also shed a new light on the catalytic application of ZIFs.

关键词： propyne selective hydrogenation Pd nanocubes zeolitic imidazolate frameworks core-shell nanostructures Pd carbide

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Organic room-temperature phosphorescent polymers for efficient X-ray scintillation and imaging

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advanced Photonics 2022年第3期4卷 90-96页

作者： Juan Wei Yangyang Jiang Chenyuan Liu Jiayu Duan Shanying Liu Xiangmei Liu Shujuan Liu Yun Ma Qiang Zhao Nanjing University of Posts and Telecommunications Institute of Advanced Materials and Institute of Flexible Electronics(Future Technology)State Key Laboratory of Organic Electronics and Information Displays and Jiangsu Key Laboratory for BiosensorsNanjingChina Nanjing University of Posts and Telecommunications College of Electronic and Optical Engineering and Microelectronics and College of Flexible Electronics(Future Technology)Jiangsu Province Engineering Research Center for Fabrication and Application of Special Optical Fiber Materials and DevicesNanjingChina

Materials that exhibit visible luminescence upon X-ray irradiation show great potential in the medical and industrial *** organic materials have recently emerged as promising scintillators for X-ray detection and radiography,due to their diversified design,low cost,and facile ***,recent progress in efficient radioluminescence has mainly focused on small molecules,which are inevitably associated with processability and repeatability ***,a concise strategy is proposed to prepare radioluminescent polymers that exhibit multiple emission colors from blue to yellow with high brightness in an amorphous state by the radical copolymerization of negatively charged polyacrylic acid and different positively charged quaternary phosphonium *** of the obtained polymers exhibits excellent photostability under a high X-ray irradiation dosage of 27.35 Gy and has a detection limit of 149 nGy s^(−1).This performance is superior to that of conventional anthracene-based ***,by simply drop-casting a polymer methanol solution on a quartz plate,a transparent scintillator screen was successfully fabricated for X-ray imaging with a resolution of 8.7 line pairs mm^(−1).The pure organic phosphorescent polymers with a highly efficient radioluminescence were demonstrated for the first time,and the strategy reported herein offers a promising pathway to expand the application range of amorphous organic scintillators.

关键词： organic scintillator radioluminescence room temperature phosphorescence X-ray imaging copolymer.

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