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4th International Conference on Electronic Information Engineering and Computer Communication, EIECC 2024

作者： Yu, Bo Zuo, Xiaozhong Gao, Sheng Shenyang Liming Aviation Parts Manufacturing Co. Ltd Shenyang110141 China Chinese Academy of Sciences State Key Laboratory of Robotics Shenyang Institute of Automation Shenyang110016 China China-Portugal Belt and Road Joint Laboratory on Space & Sea Technology Advanced Research Shanghai200120 China

ISBN: (纸本)9798331534622

To address the challenge of achieving efficient and flexible communication between space robots and marine robots during cross-domain collaboration tasks, a hybrid communication integration architecture that combines self-organizing networks and satellite internet is proposed to overcome communication barriers. First, the fundamental technologies of self-organizing networks and satellite internet communication, along with their characteristics, are analyzed in detail. Next, the design of the hybrid communication integration architecture is elaborated, focusing on intra-cluster communication, inter-cluster communication, and cooperative communication technologies in conjunction with the ground command center. Simulation results validate the proposed architecture, demonstrating its capability to meet key performance metrics such as low communication delay, high throughput, and high reliability across various tasks. Finally, the potential optimizations and future research directions for this system are discussed, highlighting the need for improvements in real-world adaptability and scalability. © 2024 IEEE.

关键词： Marine communication

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Gadolinium-doped mesoporous tungsten oxides:Rational synthesis,gas sensing performance,and mechanism investigation

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Nano Research 2023年第5期16卷 7527-7536页

作者： Yanyan Li keyu Chen Yan Liu Junhao Ma Yaozu Liao Haitao Yang Jinsheng Cheng Qin Yue Kaiping Yuan Yuan Ren Yidong Zou Yonghui Deng Department of Chemistry Department of Gastroenterology and HepatologyZhongshan HospitalZhangjiang Fudan International Innovation CenterState Key Laboratory of Molecular Engineering of PolymersiChEMShanghai Key Laboratory of Molecular Catalysis and Innovative MaterialsFudan UniversityShanghai 200433China State Key Laboratory for Modification of Chemical Fibers and Polymer Materials Donghua UniversityShanghai 201620China School of Materials Science and Engineering Nanchang Hangkong UniversityNanchang 330063China Institute of Fundamental and Frontier Sciences University of Electronic Science and Technology of ChinaChengdu 610051China Frontier Institute of Chip and System Fudan UniversityShanghai 200433China Henry-Fork School of Food Sciences Shaoguan UniversityShaoguan 512005China

As a typical family of volatile toxic compounds,benzene derivatives are massive emission in industrial production and the automobile field,causing serious threat to human and *** reliable and convenient detection of low concentration benzene derivatives based on intelligent gas sensor is urgent and of great significance for environmental ***,through heteroatomic doping engineering,rare-earth gadolinium(Gd)doped mesoporous WO_(3)with uniform mesopores(15.7–18.1 nm),tunable high specific surface area(52–55 m^(2)·g^(−1)),customized crystalline pore walls,was designed and utilized to fabricate highly sensitive gas sensors toward benzene derivatives,such as *** to the high-density oxygen vacancies(OV)and significantly increased defects(W^(5+))produced by Gd atoms doping into the lattice of WO_(3)octahedron,Gd-doped mesoporous WO_(3)exhibited excellent ethylbenzene sensing performance,including high response(237 vs.50 ppm),rapid response–recovery dynamic(13 s/25 s vs.50 ppm),extremely low theoretical detection limit of 24 *** in-situ diffuse reflectance infrared Fourier transform and gas chromatograph-mass spectrometry results revealed the gas sensing process underwent a catalytic oxidation conversion of ethylbenzene into alcohol species,benzaldehyde,acetophenone,and carboxylate species along with the resistance change of the Gd-doped mesoporous WO_(3)based ***,a portable smart gas sensing module was fabricated and demonstrated for real-time detecting ethylbenzene,which provided new ideas to design heteroatom doped mesoporous materials for intelligent sensors.

关键词： mesoporous materials semiconductor metal oxides gadolinium doping gas sensor benzene derivatives

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Learning to Identify Footholds from Geometric Characteristics for a Six-legged Robot over Rugged Terrain

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Journal of Bionic Engineering 2020年第3期17卷 512-522页

作者： Jie Chen Chong Liu Haibin Zhao Yanhe Zhu Jie Zhao School of Mechanical Engineering and Automation Northeastern UniversityShenyang 110819China State Key Laboratory of Robotics and System Harbin Institute of TechnologyHarbin 150001China

Foothold identification is a key ability for legged robots that allows generating terrain adaptive behaviors(e.g.,gait and control parameters)and thereby improving mobility in complex *** this end,this paper addresses the issue of foothold characterization and identification over rugged terrain,from the terrain geometry point of *** a terrain region that might be a potential foothold of a robotic leg,the characteristic features are extracted as two first-order partial derivatives and two curvature parameters of a quadric regression surface at this *** features are able to give an intuitive and,more importantly,accurate characterization towards the specific geometry of the ground *** this basis,a supervised learning technique,Support Vector Machine(SVM),is employed,seeking to Ieam a foothold identification policy from human expert *** a result,an SVM classifier is leamt using the extracted features and human-demonstrated labels,which is able to identify whether or not a certain ground location is suited as a safe foot support for a robotic *** is shown that over 90%identification rate can be achieved with the proposed ***,preliminary experiment is implemented with a six-legged robot to demonstrate the effectiveness of the proposed approach.

关键词： six-legged robot foothold characterization foothold identification geometric characteristics support vector machine

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Constraints on Characteristics and Distribution of Gas Hydrate and Free Gas Using Broad-Band Processing of Three-Dimensional Seismic Data

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Journal of Ocean University of China 2024年第5期23卷 1233-1247页

作者： WANG Xiujuan ZHOU Jilin LI Sanzhong LI Lixia LI Jie LI Yuanping WANG Linfei SU Pibo JIN Jiapeng GONG Zhi State Key Laboratory of Offshore Natural Gas Hydrate Beijing 100028China Frontiers Science Center for Deep Ocean Multispheres and Earth System Key Laboratory of Submarine Geosciences and Prospecting TechniquesMOE and College of Marine GeosciencesOcean University of ChinaQingdao 266100China Laboratory for Marine Mineral Resources Qingdao Marine Science and Technology CenterQingdao 266237China CNOOC Research Institute Co. Ltd.Beijing 100028China CNOOC China Limited Shenzhen BranchShenzhen 518054China Guangzhou Marine Geological Survey China Geological SurveyGuangzhou 510000China

Gas hydrate drilling expeditions in the Pearl River Mouth Basin,South China Sea,have identified concentrated gas hydrates with variable ***,free gas and the coexistence of gas hydrate and free gas have been confirmed by logging,coring,and production tests in the foraminifera-rich silty sediments with complex bottom-simulating reflectors(BSRs).The broad-band processing is conducted on conventional three-dimensional(3D)seismic data to improve the image and detection accuracy of gas hydratebearing layers and delineate the saturation and thickness of gas hydrate-and free gas-bearing *** geophysical attributes extracted along the base of the gas hydrate stability zone are used to demonstrate the variable distribution and the controlling factors for the differential enrichment of gas *** inverted gas hydrate saturation at the production zone is over 40% with a thickness of 90 m,showing the interbedded distribution with different boundaries between gas hydrate-and free gas-bearing ***,the gas hydrate saturation value at the adjacent canyon is 70%,with 30-m-thick patches and linear *** lithological and fault controls on gas hydrate and free gas distributions are demonstrated by tracing each gas hydrate-bearing ***,the BSR depths based on broad-band reprocessed 3D seismic data not only exhibit variations due to small-scale topographic changes caused by seafloor sedimentation and erosion but also show the upward shift of BSR and the blocky distribution of the coexistence of gas hydrate and free gas in the Pearl River Mouth Basin.

关键词： gas hydrate free gas shift of BSR broad-band processing

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Make LLM a Testing Expert: Bringing Human-Like Interaction to Mobile GUI Testing via Functionality-Aware Decisions 24

Make LLM a Testing Expert: Bringing Human-Like Interaction t...

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44th ACM/IEEE International Conference on Software Engineering, ICSE 2024

作者： Liu, Zhe Chen, Chunyang Wang, Junjie Chen, Mengzhuo Wu, Boyu Che, Xing Wang, Dandan Wang, Qing State Key Laboratory of Intelligent Game Beijing China Institute of Software Chinese Academy of Sciences Beijing China University of Chinese Academy of Sciences Beijing China Technical University of Munich Munich Germany DiDi Global Inc Science & Technology on Integrated Information System Laboratory China

ISBN: (纸本)9798400702174

Automated Graphical User Interface (GUI) testing plays a crucial role in ensuring app quality, especially as mobile applications have become an integral part of our daily lives. Despite the growing popularity of learning-based techniques in automated GUI testing due to their ability to generate human-like interactions, they still suffer from several limitations, such as low testing coverage, inadequate generalization capabilities, and heavy reliance on training data. Inspired by the success of Large Language Models (LLMs) like ChatGPT in natural language understanding and question answering, we formulate the mobile GUI testing problem as a Q&A task. We propose GPTDroid, asking LLM to chat with the mobile apps by passing the GUI page information to LLM to elicit testing scripts, and executing them to keep passing the app feedback to LLM, iterating the whole process. Within this framework, we have also introduced a functionality-aware memory prompting mechanism that equips the LLM with the ability to retain testing knowledge of the whole process and conduct long-term, functionality-based reasoning to guide exploration. We evaluate it on 93 apps from Google Play and demonstrate that it outperforms the best baseline by 32% in activity coverage, and detects 31% more bugs at a faster rate. Moreover, GPTDroid identifies 53 new bugs on Google Play, of which 35 have been confirmed and fixed. © 2024 ACM.

关键词： Graphical user interfaces

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Research on Self-Heating Multi-Pulse Test Method of MMC Power Sub-module

Research on Self-Heating Multi-Pulse Test Method of MMC Powe...

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2023 Power Electronics and Power system Conference, PEPSC 2023

作者： Ma, Kai Tan, Lingqi Li, Ying Jiang, Huaping Li, Xinwei Electric Power Research Institute of Guangdong Power Grid Co. Ltd. Guangdong Key Laboratory of Electric Power Equipment Reliability Guangzhou China Chongqing University State Key Laboratory of Power Transmission Equipment & System Security and New Technology Chongqing China

ISBN: (纸本)9798350341294

The modular multilevel converter (MMC) in flexible HVDC transmission systems consists of a large number of power modules, and the reliability of IGBT devices in the power modules is crucial for the long-term stable operation of the system. Aiming at the half-bridge MMC power module, a self-heating multi-pulse test method for IGBT is proposed. This method can self-heat the tested IGBT and carry out multi-pulse test without disassembling the power module. In this way, dynamic parameters of IGBT can be extracted to provide a basis for analyzing the aging degree of IGBT in MMC power module. The feasibility of this test method is verified by theoretical calculation, simulation analysis and experimental verification, which will provide a new idea for the regular maintenance of modular multilevel converter system. © 2023 IEEE.

关键词： Insulated gate bipolar transistors (IGBT)

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The bubble formation characteristics of oil‐paper insulation and its influence on insulation performance

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High Voltage 2023年第5期8卷 1030-1040页

作者： Yiyi Zhang Qianlun Du Wenchang Wei Wenqiang Wang Gang Wang Yansong Liu Qing Xie Guangxi Power Transmission and Distribution Network Lightning Protection Engineering Technology Research Center Guangxi UniversityNanningChina Electric Power Research Institute Guangxi Power Grid Co.Ltd.NanningChina State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources North China Electric Power University BaodingChina

Engineering experience shows that for transformers with long service life and serious moisture exposure,the inter‐turn paper insulation inside the winding will precipitate bubbles under the condition of electric field and conductor heating,which will endanger the equipment *** order to explore the influence factors of bubbles formation in the moist insulating paper of transformers,based on the existing research on the influence of moisture content and gas dissolution in transformer oil,this study further considers the influence of air pressure(AP)and electric field and establishes an experimental platform to change the air pressure and electric field,thereby studying the formation characteristics of bubbles in oil‐paper *** results show that air pressure and electric field can affect the initial temperature,volume,and shape of bubble *** 0 to−0.05 MPa for air pressure,the initial temperature of bubble generation decreased by 41℃,its maximum two‐dimensional projected area increased by 418.4%with more severe distortion,and the breakdown voltage *** the AC voltage applied on the needle plate electrode increased from 0 to 10 kV,the initial temperature of bubble formation increased by 29℃,and the maximum two‐dimensional projection area increased by 336.6%.

关键词： bubble insulation characteristics

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Analysis of key technologies for UAV conflict-free four-dimensional trajectory planning in controlled airspace*

Analysis of key technologies for UAV conflict-free four-dime...

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Chinese Control and Decision Conference, CCDC

作者： Longbiao Ma Weiyu Jiang Yungang Tian Yang Zhang The State Key Laboratory of Air Traffic Management System and Technology Nanjing Chian

At present, with the development of UAV technology, its flight capability and frequency of use continue to increase, making the integration of UAV operation into manned airspace has become an inevitable trend. This paper reviews the research status of conflict-free four-dimensional trajectory planning of manned and unmanned aerial vehicles in controlled airspace. In view of the urgent need for the application of refined air traffic control in the mixed operation environment of manned aircraft and unmanned aerial vehicles, and combining with the concept of global operation of the development frontier of air traffic control technology based on four-dimensional trajectory operation, this paper focus on the analysis of the key technical issues of conflict-free four-dimensional trajectory planning in the mixed operation of manned and unmanned aerial vehicles in controlled airspace. Conflict-free 4D trajectory planning for the mixed operation of manned-aircraft/UAV in the controlled area requires the research work on calculation of the minimum safe interval for the mixed operation of manned-aircraft/UAV, the real-time prediction of 4D trajectory of UAV , and the conflict-free 4D trajectory based on 4D digital airspace grid. etc.

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Factors affecting land dissection density in geomorphological regions of China

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Journal of Mountain Science 2024年第4期21卷 1372-1387页

作者： SUN Xiaolin ZHAO Yinjun PENG Peihao CHENG Weiming WEI Yongping YANG Ronghao LI Jiaxu College of Earth Sciences Chengdu University of TechnologyChengdu 610059China School of Civil Engineering Guangxi Polytechnic of ConstructionNanning 530001China Key Laboratory of Environment Change and Resources Use in Beibu Gulf Ministry of EducationNanning Normal UniversityNanning 530001China Key Laboratory of Earth Surface Process and Intelligent Simulation(Guangxi) Nanning Normal UniversityNanning 530001China State Key Laboratory of Resources and Environmental Information System Institute of Geographic Sciences and Natural Resources ResearchCASBeijing 100101China School of Earth and Environmental Sciences The University of QueenslandBrisbane 4702Australia School of Geography and Planning Nanning Normal UniversityNanning 530001China

Land dissection density(LDD)provides morphological evidence regarding prior intense soil erosion and quantifies the distribution of land dissections.A comprehensive understanding of the potential factors influencing the spatial pattern and value of the LDD is vital in geological disasters,soil erosion,and other related *** dissection phenomena in China affects large areas with different morphological,pedological,and climatic *** studies have focused on the potential factors influencing the LDD at a watershed ***,these results are insufficient to reflect the status quo of dissection development and its primary influencing factors on a national ***’s spatial patterns and the dominant factors at a regional scale in millions of square kilometers remain to be *** study used the geomorphon-based method and the geographical detector model to quantify the spatial pattern of LDD over China and identify the dominant factors affecting this pattern in China’s six first-order geomorphological regions(GR1~GR6).The results yield the following findings:(1)LDD in China ranges from 0~4.55 km/km^(2),which is larger in central and eastern regions than in other regions of China;(2)dominant factors and their dominant risk subcategories vary with each geomorphological region’s primary internal and external forces;(3)the influence of natural factors is more significant on the large regional scale in millions of square kilometers compared to anthropogenic factors;relief degree of land surface(RDLS)is dominant in GR1,GR2,and GR5;the slope is dominant in GR6,soil type is dominant in GR3 and GR4,and lithology plays a critical role in the dominant interactions of GR3,GR4,and GR6;(4)the interactions between factors on LDD’s spatial pattern have a more significant effect than individual factors.

关键词： Land dissection density Influencing factors Regional scale Spatial pattern Geographical detector model Geomorphon-based method China

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An IMU Error Correction Method Based on Multithreshold ZV Detection and SRCKF

An IMU Error Correction Method Based on Multithreshold ZV De...

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2023 International Conference on Cyber-Physical Social Intelligence, ICCSI 2023

作者： Luo, Jialiang Chen, Shichao Lv, Yisheng Sun, Wenqiao Yang, Fan Xu, Ruijie Institute of Automation Chinese Academy of Sciences School of Information Engineering China University of Geosciences Beijing The State Key Laboratory for Management and Control of Complex System State Key Laboratory of Multimodal Artificial Intelligence Systems China Institute of Automation Chinese Academy of Sciences The Center of National Railway Intelligent Transportation System Engineering and Technology China Academy of Railway Sciences Corporation Limited The State Key Laboratory of Multimodal Artificial Intelligence Systems Beijing China Institute of Automation Chinese Academy of Sciences The State Key Laboratory of Multimodal Artificial Intelligence Systems Beijing China Transportation and Economics Research Institute Center of National Railway Intelligent Transportation System Engineering and Technology China Academy of Railway Sciences Corporation Limited China State Key Laboratory of Multimodal Artificial Intelligence Systems Institute of Automation Chinese Academy of Sciences College of Rail Transit Shan Dong JiaoTong University The State Key Laboratory for Management and Control of Complex System Jinan China The Hong Kong Polytechnic University Department of Aeronautical and Aviation Engineering Hong Kong Hong Kong

ISBN: (纸本)9798350312492

With the rapid development and widespread application of Inertial Measurement Units (IMUs), IMU-based human localization has become critically important in environments lacking Global Navigation Satellite systems (GNSS) signals. Methods such as UWB/WIFI and other anchor-based localization have been employed to enhance the positioning accuracy. However, these methods are susceptible to the environmental interference and increased costs. In contrast, SINS-based localization methods eliminate reliance on the external data. However, this method can suffer from drift errors due to cumulative integration errors. Inertial navigation error correction techniques like Zero Detection Update technology (ZUPT) provide potential solutions to address drift errors. This paper proposes an error correction method based on the multithreshold zero-velocity detection and Square Root Cubature Kalman Filter (SRCKF) updates. Compared to the single fixed threshold detection, the multi-threshold zero-velocity detection reduces the likelihood of missed zero velocity detection and false alarms, providing accurate time intervals for error correction. Experimental results demonstrate that the SRCKF-based algorithm reduces position deviation to approximately 0.3146 meters, corresponding to an error ratio of1.14%. The proposed method enables cost-effective and accurate pedestrian localization, driving advancements in the field. © 2023 IEEE.

关键词： Cost effectiveness

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