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Machine Learning and Computer Application (ICMLCA), International Conference on

作者： Yiwen Bai Lu Yang Lei Zhang Yajing Song School of Transportation Science and Engineering Beihang University Beijing China Tianjin Key Laboratory for Advanced Mechanical System Design and Intelligent Control School of Mechanical Engineering Tianjin University of Technology Tianjin China National Demonstration Center for Experimental Mechanical and Electrical Engineering Education (Tianjin University of Technology) Tianjin China Traffic Control Technology Co. Ltd Beijing China

ISBN: (数字)9798331530334

ISBN: (纸本)9798331530341

With the rapid development of railway traffic system, real-time semantic segmentation plays a crucial role in railway track scene monitoring. However, most of the existing methods use lightweight convolution to reduce the computational complexity, which results in reduced accuracy. To solve this problem, this paper proposes a real-time semantic segmentation network called TICNet, which is specifically used for accurate segmentation of railway track scenes. TICNet uses a novel three-branch structure designed for efficient feature extraction and accurate segmentation. Results on the RailSem19 dataset show that TICNet has a segmentation accuracy of 62.36% mIoU with an inference speed of 81.2 FPS, which is significantly better than many existing methods.

关键词： Accuracy Convolution Semantic segmentation Semantics Focusing Machine learning Feature extraction Real-time systems Computational complexity Monitoring

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The missing base molecules in atmospheric acid-base nucleation

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National Science Review 2022年第10期9卷 196-208页

作者： Runlong Cai Rujing Yin Chao Yan Dongsen Yang Chenjuan Deng Lubna Dada Juha Kangasluoma Jenni Kontkanen Roope Halonen Yan Ma Xiuhui Zhang Pauli Paasonen Tuukka Pet?j? Veli-Matti Kerminen Yongchun Liu Federico Bianchi Jun Zheng Lin Wang Jiming Hao James N.Smith Neil M. Donahue Markku Kulmala Douglas R.Worsnop Jingkun Jiang State Key Joint Laboratory of Environment Simulation and Pollution Control School of Environment Tsinghua University Institute for Atmospheric and Earth System Research/Physics Faculty of Science University of Helsinki Aerosol and Haze Laboratory Beijing Advanced Innovation Center for Soft Matter Science and Engineering Beijing University of Chemical Technology Collaborative Innovation Center of Atmospheric Environment and Equipment Technology Nanjing University of Information Science and Technology Laboratory of Atmospheric Chemistry Paul Scherrer Institute Center for Joint Quantum Studies and Department of Physics School of Science Tianjin University Key Laboratory of Cluster Science Ministry of Education of China School of Chemistry and Chemical Engineering Beijing Institute of Technology Shanghai Key Laboratory of Atmospheric Particle Pollution and Prevention (LAP3) Department of Environmental Science and Engineering Fudan University Chemistry Department University of California Center for Atmospheric Particle Studies Carnegie Mellon University Department of Chemistry Carnegie Mellon University Aerodyne Research Inc.

Transformation of low-volatility gaseous precursors to new particles affects aerosol number concentration,cloud formation and hence the *** clustering of acid and base molecules is a major mechanism driving fast nucleation and initial growth of new particles in the ***,the acid-base cluster composition,measured using state-of-the-art mass spectrometers,cannot explain the measured high formation rate of new *** we present strong evidence for the existence of base molecules such as amines in the smallest atmospheric sulfuric acid clusters prior to their detection by mass *** demonstrate that forming（H2SO4）1（amine）1is the rate-limiting step in atmospheric H2SO4-amine nucleation and the uptake of（H2SO4）1（amine）1is a major pathway for the initial growth of *** proposed mechanism is very consistent with measured new particle formation in urban Beijing,in which dimethylamine is the key base for H2SO4nucleation while other bases such as ammonia may contribute to the growth of larger *** findings further underline the fact that strong amines,even at low concentrations and when undetected in the smallest clusters,can be crucial to particle formation in the planetary boundary layer.

关键词： new particle formation acid-base nucleation aerosol polluted urban environment

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Dynamic Mobile Manipulation via Whole-Body Bilateral Teleoperation of a Wheeled Humanoid

arXiv

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arXiv 2023年

作者： Purushottam, Amartya Jung, Yeongtae Xu, Christopher Ramos, Joao Department of Electrical and Computer Engineering The University of Illinois Urbana-Champaign United States Department of Mechanical Science and Engineering The University of Illinois Urbana-Champaign United States Department of Mechanical System Engineering Advanced Transportation Machinery Research Center Jeonbuk National University Jeollabuk-do 54896 Korea Republic of

Humanoid robots have the potential to help human workers by realizing physically demanding manipulation tasks such as moving large boxes within warehouses. We define such tasks as Dynamic Mobile Manipulation (DMM). This paper presents a framework for DMM via whole-body teleoperation, built upon three key contributions: Firstly, a teleoperation framework employing a Human Machine Interface (HMI) and a bi-wheeled humanoid, SATYRR, is proposed. Secondly, the study introduces a dynamic locomotion mapping, utilizing human-robot reduced order models, and a kinematic retargeting strategy for manipulation tasks. Additionally, the paper discusses the role of whole-body haptic feedback for wheeled humanoid control. Finally, the system’s effectiveness and mappings for DMM are validated through locomanipulation experiments and heavy box pushing tasks. Here we show two forms of DMM: grasping a target moving at an average speed of 0.4 m/s, and pushing boxes weighing up to 105% of the robot’s weight. By simultaneously adjusting their pitch and using their arms, the pilot adjusts the robot pose to apply larger contact forces and move a heavy box at a constant velocity of 0.2 m/s. Copyright © 2023, The Authors. All rights reserved.

关键词： Remote control

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Investigation on Effects of Piston Shape and Nozzle Specifications on Natural Gas–Diesel Dual-Fuel Rcci Engine and its Application to High Load Extension

SSRN

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SSRN 2022年

作者： Oh, Sechul Oh, Junho Jang, Hyeong-Jun Lee, Seokhwan Lee, Sunyoup Kim, Changgi Lee, Jeongwoo Department of Mobility Power Research Korea Institute of Machinery and Materials Korea Republic of Advanced Transportation Machinery Research Center Division of Mechanical System Engineering Jeonbuk National University Korea Republic of Department of Engine Research

In this study, the effects of modifications of both the piston shape and injector nozzle are experimentally investigated for high load extension of a natural gas–diesel dual-fuel reactivity-controlled compression ignition (RCCI) engine. First, a bathtub shape with a reduced compression ratio is applied to the modified piston which was reported to improve the flame propagation in squish volume, the cooling loss, and the air induction rate under the same limit of in-cylinder pressure from previous studies. In addition, a multiangle two-layer injector is used to extend the maximum load, which has been proven to be effective for unburned hydrocarbon emissions and gross indicated efficiency in part-load operation in our previous study. The experiments are conducted under both 1,200 RPM part-load operation (approximately 1,950 J/cylinder per cycle of fuel input energy) and 1,800 RPM maximum load operation. The objectives are to comprehensively evaluate the effects of the modifications on natural gas–diesel RCCI operation and verify the effects of all load conditions. The experimental results reveal that the changes in the piston—reduction in the compression ratio and a bathtub piston shape—are effective for both NOx and smoke emissions as the diesel injection timing is advanced. Although the multi-hole double layer (combined narrow and wide injection) has less effect on emissions compared to that of the change in piston, it affects the mixing process inside the cylinder, thus retarding the combustion phasing, prolonging the combustion duration, and eventually reducing the cooling loss. Both modifications are highly effective for advanced diesel injection timing corresponding to RCCI operation, which extends high-load operation from 80.9 to 101 kW of brake power by adopting both the piston and injector modifications. Based on the modifications, the mass fraction of natural gas is suggested to be approximately 80 %. A higher fraction causes the variation in the maximum in-c

关键词： Nitrogen oxides

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Continuous Perception Garment Classification Based on Optical Flow Variation

Continuous Perception Garment Classification Based on Optica...

引用

2022 IEEE International Conference on Robotics and Biomimetics, ROBIO 2022

作者： Huang, Li Yang, Tong Zhang, Yu Jiang, Rongxin Tian, Xiang Chen, Yaowu Institute of Advanced Digital Technologies and Instrumentation Zhejiang University Hangzhou310027 China State Key Laboratory of Industrial Control and Technology Zhejiang University 310027 China Zhejiang Provincial Key Laboratory for Network Multimedia Technology Hangzhou310027 China Embedded System Engineering Research Center Ministry of Education of China Hangzhou310027 China

ISBN: (纸本)9781665481090

A novel continuous perception garment classification mechanism is proposed in this paper, with the aim to identify the correct category of the garment from a set of known categories. It has been observed that due to the severe folding and overlapped texture of garments, treating a video of the continuous deformation of cloth as a set of disordered static figures would be ineffective which leads to low classification precision performed by an image-based garment classifier. In contrast, a high-level decision making module that leverages the classification results of each single image would significantly increase the algorithm performance. In this paper, we incorporate the optical flow variation of deformable cloth between consecutive configurations as a representative of how it is traversing within the confidence interval of the image-based classifier. We claim that it is not the number of video frames but the sum of optical flow variation of the garment configuration between consecutive frames having the same category label that constitutes the belief of garment classification. In other words, if two consecutive visual appearances of the garment could be identified as the same category by the image-based classifier, then the more diverged that two configurations are, the more confident that the garment is correctly identified. Experimental comparisons between the state-of-the-art algorithm and the proposed algorithm in a public dataset have been provided which prove the validity of the proposed algorithm. © 2022 IEEE.

关键词： Decision making

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Upward Soil Arching Effect Under Unloading: Mechanism, Theory and engineering Application

SSRN

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SSRN 2024年

作者： Chen, Ren-Peng Wang, Han-Lin Meng, Fanyan Liu, Qi-Wei Lin, Xing-Tao Research Center for Advanced Underground Space Technologies Hunan University Changsha410082 China Key Laboratory of Building Safety and Energy Efficiency The Ministry of Education Hunan University Changsha410082 China College of Civil Engineering Hunan University Changsha410082 China College of Civil and Transportation Engineering Shenzhen University Shenzhen518061 China

Upward soil arching effect under unloading indicates the unloading part moves in a vertically downward direction, generating the arching zone and the loosened zone towards an upward direction. This study presents a summary of definitions, characteristics, theoretical models and engineering applications for the upward soil arching effect under unloading. The evolution of the upward soil arching effect is highly related to the unloading/differential displacement. The characteristics of the upward soil arching effect under unloading are comprehensively interpreted in terms of the normalized height of arching, the minimum soil arching ratio (at which state the maximum arching is developed) and the normalized unloading displacement to reach the maximum arching state. Two deformation-dependent theoretical models are proposed, to appropriately interpret and predict the variation of the soil arching ratio with the normalized unloading displacement (i.e., the ground reaction curve). Using the research findings for the upward soil arching effect under unloading, the settlement of the geosynthetic-reinforced pile-supported embankment, and the face stability and the ground settlement during tunnelling are proven to be precisely predicted and well controlled. © 2024, The Authors. All rights reserved.

关键词： Soils

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Borosilicate bioactive glass synergizing low-dose antibiotic loaded implants to combat bacteria through ATP disruption and oxidative stress to sequentially achieve osseointegration

引用

Bioactive Materials 2025年第2期44卷 184-204页

作者： Mengke Fan Youliang Ren Yanbin Zhu Hao Zhang Shuaijie Li Chunyu Liu Hongzhi Lv Lei Chu Zhiyong Hou Yingze Zhang Haobo Pan Xu Cui Wei Chen Department of Orthopaedic Surgery the Hebei Medical University Third Hospital Orthopaedic Research Institution of Hebei ProvinceNHC Key Laboratory of Intelligent Orthopaedic EquipmentEngineering Research Center of Orthopedic Minimally Invasive Intelligent Equipment of Ministry of EducationKey Laboratory of Biomechanics of Hebei ProvinceNo.139 Ziqiang RoadShijiazhuang050051PR China Shenzhen Key Laboratory of Marine Biomedical Materials CAS-HK Joint Lab of BiomaterialsThe Key Laboratory of Biomedical Imaging Science and SystemShenzhen Institute of Advanced TechnologyChinese Academy of SciencesShenzhen518055PR China Department of Orthopaedics Second Affiliated Hospital of Chongqing Medical University76 Linjiang RoadYuzhong DistinctChongqing400010PR China Department of Orthopaedics Guizhou Provincial People’s HospitalGuiyang550000PR China Shenzhen Healthemes Biotechnology Co. Ltd.ShenzhenPR China

Bone infection is a catastrophe in clinical *** being the standard therapy for osteomyelitis,antibiotic-loaded polymethyl methacrylate(PMMA)cement has low efficiency against bacteria in ***,high-dose antibiotic-loaded implants carry risks of bacterial resistance,tissue toxicity,and impairment of local tissue *** incorporating borosilicate bioactive glass(BSG)into low-dose gentamicin sulfate(GS)-loaded PMMA cement,an intelligent strategy that synergistically eradicates bacteria and sequen-tially promotes osseointegration,was *** showed that BSG did not compromises the handling properties of the cement,but actually endowed it with an ionic and alkaline microenvironment,thereby damaging the integrity of bacterial cell walls and membranes,inhibiting ATP synthesis by disrupting the res-piratory chain in cell membranes and glycogen metabolism,and elevating reactive oxygen species(ROS)levels by weakening antioxidant components(peroxisomes and carotenoids).These antibacterial characteristics of BSG synergistically reinforced the effectiveness of GS,which was far below the actual clinical dosage,achieving efficient bacterial killing and biofilm clearance by binding to the 30S subunit of ***,the released GS and the ionic and alkaline microenvironment from the implants fostered the osteogenic activity of hBMSCs in vitro and coordinately enhanced osseointegration in ***,this study underscores that BSG incorporation offers a promising strategy for reducing antibiotic dosage while simultaneously enhancing the antibacterial activity and osteogenesis of *** approach holds potential for resolving the conflict be-tween bacterial resistance and bone infection.

关键词： Staphylococcus aureus Biofilm Osteomyelitis Borosilicate bioactive glass Polymethyl methacrylate

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An injectable micelle-hydrogel hybrid for localized and prolonged drug delivery in the management of renal fibrosis

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Acta Pharmaceutica Sinica B 2021年第3期11卷 835-847页

作者： Xianyan Qin Yingying Xu Xu Zhou Tao Gong Zhi-Rong Zhang Yao Fu Key Laboratory of Drug-Targeting and Drug Delivery System of the Education Ministry and Sichuan Province Sichuan Engineering Laboratory for Plant-Sourced Drug and Sichuan Research Center for Drug Precision Industrial TechnologyWest China School of PharmacySichuan UniversityChengdu 610041China Key Laboratory of Advanced Technologies of Materials Ministry of Education and School of Materials Science and EngineeringSouthwest Jiaotong UniversityChengdu 610031China Sichuan Provincial Orthopedic Hospital Chengdu 610041China

Localized delivery,comparing to systemic drug administration,offers a unique alternative to enhance efficacy,lower dosage,and minimize systemic tissue toxicity by releasing therapeutics locally and specifically to the site of ***,a localized drug delivery platform ("plum?pudding"structure) with controlled release and long-acting features is developed through an injectable hydrogel ("pudding") crosslinked via self-assembled triblock polymeric micelles ("plum") to help reduce renal interstitial *** strategy achieves controlled and prolonged release of model therapeutics in the kidney for up to three weeks in *** a single injection,local treatments containing either anti-inflammatory small molecule celastrol or anti-TGFb antibody effectively minimize inflammation while alleviating fibrosis via inhibiting NF-k B signaling pathway or neutralizing TGF-b1 ***,the micelle-hydrogel hybrid based localized therapy shows enhanced efficacy without local or systemic toxicity,which may represent a clinically relevant delivery platform in the management of renal interstitial fibrosis.

关键词： Hydrogel "Plum-pudding"structure Localized therapy Controlled release Renal fibrosis Inflammation Celastrol Anti-TGFβantibody

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RCS: Automatic Navigation Framework for Legged Robots with Incremental RGB and Consistent Semantics Information

RCS: Automatic Navigation Framework for Legged Robots with I...

引用

IEEE International Conference on Robotics and Biomimetics

作者： Dayu Liu Teng Chen Guoteng Zhang Zhicheng Zhao Xuewen Rong Yong Fan Yibin Li Shandong Youbaote Intelligent Robotics CO. LTD Jinan China School of Control Science and Engineering Shandong University Jinan China Engineering Research Center of Lntelligent Unmanned System Ministry of Education Jinan China School of Rail Transportation Shandong Jiaotong University Jinan China

Autonomous movement of legged robots in outdoor scenes requires accurate state estimation and environment navigation maps. Different from wheeled and tracked mobile robots, legged robots can adjust parameters such as gait type, step height, gait frequency, torso height, foot friction, and other coefficients to better adapt to the geometric characteristics and physical properties of verstile terrains. To this end, in this paper, we propose a framework for autonomous navigation of legged robots, including the construction of geometric-property RGB consistent semantic map (RCS) and the autonomous navigation method under the RCS map. The method for building RCS map formulates lidar-inertial odometry based on a factor graph. Through end-to-end semantic segmentation of images, terrain information is projected and saved while mapping. For achieving pose and point cloud consistency, local and global lidar boudle adjustment (BA) is introduced to the optimization process. We demonstrated the effectiveness of RCS through outdoor navigation experiments on a quadruped robot. The experiment shows that our terrain detection method can achieve an average detection time of 30 ms on an embedded board.

关键词：

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Temperature Endurable Face-Sealing Polyisobutylene Film with Contactable Liquid Desiccant for the Encapsulation of OLEDs

SSRN

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SSRN 2024年

作者： Zheng, Haixai Zhu, Yangyang Zhao, Bingjia Lin, Yang Lan, Weixia Shi, Wei Wei, Bin School of Mechatronic Engineering and Automation Shanghai University Shanghai200072 China Shanghai Engineering Research Center for Integrated Circuits and Advanced Display Materials Shanghai University Shanghai200072 China Key Laboratory of Advanced Display and System Applications Ministry of Education Shanghai University Shanghai200072 China School of Microelectronics Shanghai University Shanghai200072 China Shanxi Datong University China

We propose a face-sealed encapsulation solution with simple process and low cost. The polyisobutylene encapsulation patch mixed with calcium oxide particles is attached to the surface of the OLEDs that is exposed to the hygroscopic agent in a face-sealing manner. We find that this encapsulation scheme exhibited excellent waterproof performance. The encapsulated OLED has a long shelf lifetime in water under high temperature conditions, which is manifested in a long underwater shelf lifetime of T95 (luminance drops to 95% of the initial luminance) of over 336 hours at 60°C. This strategy can be extended to roll-to-roll processes to expand the application of flexible photoelectronic devices. © 2024, The Authors. All rights reserved.

关键词： Luminance

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