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International conference on Guidance, Navigation and control, ICGNC 2024

作者： Chen, Xinyu Qi, Juntong Peng, Yan Ping, Yuan Wu, Chong Wang, Mingming Institute of Artificial Intelligence Shanghai University Shanghai China Technology Co. Ltd. R&D Center Hainan China Tianjin Key Laboratory of Intelligent Unmanned Swarm Technology and System Institute of Electrical and Information Engineering Tianjin University Tianjin China

ISBN: (纸本)9789819622634

This paper introduces a two-stage method, combining K-means++ and a modified genetic algorithm (T-KMGA), aimed at simplifying collaborative task allocation complexity and enhancing operational efficiency within heterogeneous autonomous task allocation unmanned systems. The proposed T-KMGA constructs a solution for task allocation through two stages: task clustering and path planning. In the first stage, we develop a modified K-means++ clustering model sensitive to unmanned aerial vehicle (UAV) endurance radii to tackle the increasing complexity of task allocation as the scale of tasks grows. In the second stage, we propose a modified genetic algorithm to plan paths for multiple UAVs and a single unmanned surface vehicle (USV) to minimize the execution time of cooperative tasks. We adopt a virtual node encoding method to solve the multiple UAV task allocation problem in the second stage. The effectiveness of the proposed approach is assessed through simulation experiments. The results demonstrate that the proposed method can significantly reduce task execution time and computational consumption, especially in large-scale task scenarios. © The Author(s), under exclusive license to Springer Nature Singapore Pte ltd. 2025.

关键词： Antennas

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Near Field coupling with a Twisted Bundle of Twisted Wire Pairs (TBTWPs) Above Ground Plane

Near Field Coupling with a Twisted Bundle of Twisted Wire Pa...

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2022 International Applied computational Electromagnetics Society Symposium, ACES-China 2022

作者： Liao, Jie Gassab, Oussama Li, Jingxiao Su, Zhizhen He, Fang Yin, Wen-Yan Zhejiang University College of Information Science and Electronic Engineering Hangzhou310058 China R&d Laboratory Zhejiang Zhaolong Interconnect Technology Co. Ltd Huzhou China

ISBN: (纸本)9781665452366

In this paper, the field-to-wire coupling with a twisted bundle of twisted-wire pairs (TBTWPs) from a near radiating source is investigated by using the multi-conductor transmission line theory. To do that, the near radiating source is assumed to be a dipole antenna, after that, the induced voltage and current sources due to the radiations of the near-source are obtained. Therefore, the induced common-mode (CM) and differential-mode (dM) currents at the terminals of the TBTWPs are achieved. The results are validated by using the commercial software FEKO with a good agreement obtained. Moreover, the sensitivity of the induced CM and dM current due to the random fluctuations of the cable parameters are investigated. It is found that the dM signal is highly sensitive to any small geometry deformation of the cable. © 2022 IEEE.

关键词： Cables

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Biomimetic Quadruped robot with a Spinal Joint and Optimal Spinal Motion via reinforcement Learning

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Journal of Bionic engineering 2021年第6期18卷 1280-1290页

作者： Young Kook Kim Woojin Seol Jihyuk Park LV R&D Team Electro-technology R&D CenterLS Electric Co.LtdCheongju28437Republic of Korea Digital Innovation Unit Korea Hydro&Nuclear Power Co.Ltd1312-gil YuseongdaeroYusung-guDaejeon34101Republic of Korea Department of Automotive Engineering College of Mechanical and IT EngineeringYeungnam University280 Daehak-roGyeongsanGyeongbuk38541Republic of Korea

Feline animals can run quickly using spinal joints as well as the joints that make up their four *** paper describes the development of a quadruped robot including a spinal joint that biomimics feline *** developed robot platform consists of four legs with a double 4-bar linkage type and one simplified rotary *** addition,Q-learning,a type of machine learning,was used to find the optimal motion profile of the spinal *** bounding gait was implemented on the robot system using the motion profile of the spinal joint,and it was confirmed that using the spinal joint can achieve a faster Center of Mass(coM)forward speed than not using the spinal *** the motion profile obtained through Q-learning did not exactly match the spinal angle of a feline animal,which is more multiarticular than that of the developed robot,the tendency of the actual feline animal spinal motion profile,which is sinusoidal,was similar.

关键词： Quadruped robot system Bioinspired methods Legged robots Machine learning Q-learning

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A Proportional-Phase Lag compensation Strategy Enhancing robustness Against Grid Impedance for LCL-Type Grid-connected Inverter

A Proportional-Phase Lag Compensation Strategy Enhancing Rob...

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2023 Power Electronics and Power System conference, PEPSC 2023

作者： Huang, Jinping Zhang, damin Su, Xianjin Zhong, Yichuan Xu, Weidong ding, Zexiang School of Electrical Engineering and Automation Xiamen University of Technology Xiamen China Kehua Data R&d Center Kehua Data Co. Ltd. Xiamen China School of Mechanical and Electrical Engineering and Automation Xiamen University Tan Kah Kee College Xiamen China

ISBN: (纸本)9798350341294

compared to analog control, the adoption of digital control in LCL-type grid-connected inverters introduces control delays, which significantly alters the frequency characteristics of open-loop transfer functions of systems and imposes stricter stability requirements on the grid-connected inverter. Furthermore, in weak grid with wide-ranging variations in grid impedance, the robustness of the system is severely compromised. To bolster the resilience of the grid-connected inverter amidst fluctuations in grid impedance, this paper proposes a proportional-phase lag compensation strategy. By considering the control delays, stability analysis of the system is conducted within the bounds of grid impedance fluctuations, and stable regions are identified based on the Nyquist stability criterion, and then phase lag compensators and proportional parameters are properly designed. The resulting improved system adheres to the Nyquist stability criterion in weak grid, ensuring the grid-connected inverter to maintain stable operation, even amidst variations in grid impedance. Ultimately, the simulation outcomes confirm the viability and efficacy of the method proposed. © 2023 IEEE.

关键词： Electric inverters

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research on online inspection technology for wellhead equipment based on phased array ultrasonic testing 4

Research on online inspection technology for wellhead equipm...

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4th International conference on Testing technology and Automation engineering, TTAE 2024

作者： Liu, Haohao Feng, Shaobo Zhao, Mifeng Wei, Junhui Wang, Pengcheng Zhou, Xuan Pan, Jianwu Zhang, Yushu Cao, Jia PetroChina Jianghan Machinery Research Institute Co. Ltd. Jingzhou434001 China Tarim Oilfield Company PetroChina Korla841000 China R&D Center for Ultra-Deep Complex Reservoir Exploration and Development CNPC Korla841000 China Engineering Research Center of Ultra-deep Complex Oil and Gas Reservoir Exploration and Development Xinjiang UygurAutonomous Region Korla841000 China

ISBN: (数字)9781510686656

ISBN: (纸本)9781510686649

For major oil fields under PetroChina, the wellhead equipment is usually abundant and diverse, selected based on the depth of the reservoirs and the extraction processes. during service, wellhead equipment is prone to erosion and corrosion, which can lead to safety risks such as leaks. Therefore, corrosion detection of high-risk wellhead equipment in service is crucial for ensuring the safe operation of these devices. considering the operating conditions and structural characteristics of wellhead equipment, the applicability of various non-destructive testing methods was compared, and a defect detection scheme for wellhead equipment, primarily based on phased array ultrasonic testing(PAUT), was determined. Using PAUT technology, an online inspection was conducted on the wellhead equipment of 10 oil and gas wells in the Keshen block of Tarim Oilfield, which were prone to corrosion. It was found that in two of these wells, the passage and flange end surface of the production wing connection short section were both corroded, with the corrosion groove having a depth of approximately 5.0 mm and a width of approximately 50 mm. The on-site inspection results validated the feasibility of applying PAUT for online inspection of wellhead equipment. © 2024 SPIE.

关键词： Ultrasonic testing

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UAV Small Target detection Algorithm Based on YOLOv8 Lightweight

UAV Small Target Detection Algorithm Based on YOLOv8 Lightwe...

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robotics, control and Automation engineering (rCAE), International conference on

作者： Xiaojun Tao Jixing Zhao Bingyou Liu dongxiang Zhang Dept. School of Electrical Engineering Anhui University of Engineering Wuhu Dept. R&D Department Huaneng Chaohu Power Generation Co. Ltd. ChaoHu Dept. R&D Department Anhui Tianbing Electronic Technology Co. Ltd. Wuhu

ISBN: (数字)9798350355642

ISBN: (纸本)9798350355659

despite significant progress in the lightweight design of UAVs, the limited computational resources that can be carried, and the existence of small targets with small sizes, inconspicuous features, and susceptibility to background interference and occlusion, UAV small target detection is still challenging. To maintain a certain accuracy while significantly reducing the model size, the article proposes a small target detection algorithm based on the YOLOv8s network. Firstly, the C2f module in the Backbone part is replaced by the dynamicconv module, which introduces adaptive convolution kernel parameters to enhance the feature extraction capability while reducing the redundancy of parameters; secondly, the weighted bidirectional feature pyramid BiFPN is utilized as the Neck-end network, which operates its highly efficient feature fusion, redundancy-reducing connection and weighted feature fusion mechanisms to improves the model accuracy, reduces the number of parameters and computation in the convolution process; finally, the up-sampling method of the original model is replaced with CArAFE and the loss function is replaced with WIoU, which enhances the model's ability to extract features in small targets, and improves the mAP50% by 1.4% and reduces the model volume by 69.8% compared to the Visdrone2019 dataset. The experimental results show that the improved model can more accurately recognize small targets in aerial photography, and can greatly reduce the volume of the model while maintaining higher accuracy.

关键词： Solid modeling Adaptation models Accuracy convolution Target recognition computational modeling Heuristic algorithms Object detection Feature extraction Autonomous aerial vehicles

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Using Unmanned Laser Scanning and Aerial Photogrammetry for Potential Large-Scale Landslide Area Monitoring 5

Using Unmanned Laser Scanning and Aerial Photogrammetry for ...

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5th IEEE Eurasia conference on IOT, communication and engineering, ECICE 2023

作者： Li, Ming-Shiuan Yang, Feng-Yu Lee, Cheng-Chun Huang, Chih-Yu Liu, Chun-Yuan Lai, Johnny Strong Engineering Consulting Co. Ltd Department of R&d New Taipei City Taiwan Strong Engineering Consulting Co. Ltd Department of Operartions New Taipei City Taiwan Soil and Water Conservation Bureau Council of Agriculture Nantou City Taiwan Disaster Prevention Technology Research Center Sinotech Engineering Consultants Inc Taipei City Taiwan Strong Engineering Consulting Co.Ltd Department of Administration New Taipei City Taiwan

ISBN: (纸本)9798350314694

Using drone aerial photogrammetry and LidAr technology, we produced the geographic data layer for multiple potential large-scale landslide areas located in Taiwan. The mobility and flexibility of aerial mapping using drones have become an efficient method for modern topographic surveying and mapping. The advantage of using Unmanned Laser Scanning (ULS, UAV LidAr) in building high-accuracy and high-detailed digital elevation models (dEM) is based on the use of laser pulses to pass through vegetation pores. The orthophoto produced by aerial photogrammetry allows for the identification of topographic surface features. Hence, the displacement and deformation data of the potential large-scale landslide can be determined. © 2023 IEEE.

关键词： digital elevation model orthophoto potential large-scale landslide area unmanned laser scanning

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Improved surface hydrophobicity of self-assembled transport layers enables perovskite/silicon tandem solar cells with efficiency approaching 31%

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Journal of Energy Chemistry 2025年第5期104卷 749-755页

作者： Jing Yang Jin Wang Biao Shi Yixin dong dongxue Liu Shenhzhi Xu Qian Huang Xiaona du Fu Zhang Miao Yang Yongcai He Bo He Xiaoning ru Shengzhong Liu Xixiang Xu Pengyang Wang Ying Zhao Xiaodan Zhang Institute of Photoelectronic Thin Film Devices and Technology Renewable Energy Conversion and Storage CenterState Key Laboratory of Photovoltaic Materials and CellsNankai UniversityTianjin 300350China Three Gorges Corporation Science and Technology Research InstituteBeijing 101199China Tianjin Key Laboratory of Efficient Utilization of Solar Energy Tianjin 300350China Haihe Laboratory of Sustainable Chemical Transformations Tianjin 300192China Engineering Research Center of Thin Film Photoelectronic Technology of Ministry of Education Tianjin 300350China Collaborative Innovation Center of Chemical Science and Engineering(Tianjin) Tianjin 300072China Key Laboratory of Applied Surface and Colloid Chemistry Ministry of EducationShaanxi Key Laboratory for Advanced Energy DevicesShaanxi Engineering Lab for Advanced Energy TechnologySchool of Materials Science and EngineeringShaanxi Normal UniversityXi’an 710119ShaanxiChina LONGi Central R&D Institute LONGi Green Energy Technology Co.Ltd.Xi’an 710018ShaanxiChina

[4-(3,6-dimethyl-9H-carbazol-9-yl)butyl]phosphonic acid(Me-4PACz)self-assembled monolayer(SAM)as the hole transport materials have been demonstrated remarkable potential in perovskite solar cells(PSCs).However,the hydrophobicity of Me-4PACz presents a critical challenge for the fabrication of high-quality perovskite films due to its poor ***,a doped Al_(2)O_(3)with Me-4PACz to modify the Me-4PACz surface was *** one hand,this approach improved the wettability of the Me-4PACz film,enhancing the coverage,uniformity,and buried interface properties of the perovskite *** the other hand,compared to Al_(2)O_(3)modification alone,doping Al_(2)O_(3)with Me-4PACz allowed direct contact between the perovskite and Me-4PACz,resulting in better buried interface *** a result,we achieved an efficiency of 22.71%for single-junction wide-bandgap perovskite solar cells(1.68 eV).Additionally,the efficiency of perovskite/silicon tandem solar cells was improved from 28.68%to 30.92%,with a significant reduction in ***,the tandem cells demonstrated no degradation after 4200 s of operation at the maximum power point.

关键词： Me-4PACz Tandem solar cell Perovskite/silicon Hydrophic

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Low-Carbon dispatch of distribution Networks considering demand response and Photovoltaic Integration

Low-Carbon Dispatch of Distribution Networks Considering Dem...

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IEEE conference on Energy Internet and Energy System Integration (EI2)

作者： Xiaolong Jiang Zifa Liu Biao cong Mengni Ye Xiaonan Zhu School of Electrical and Electronic Engineering North China Electric Power University Beijing China R&D Center Intelligent Power Distribution Technology R&D Department NARI Group Co. Ltd Nanjing China

ISBN: (数字)9798331523527

ISBN: (纸本)9798331523534

In the context of low-carbon electricity, the low-carbon operation of the distribution network significantly impacts the reduction of carbon emissions in the power system. Addressing how to achieve coordinated low-carbon economic operation at the distribution network level is an urgent issue that requires resolution. This paper proposes a low-carbon scheduling model that considers carbon emissions and demand response within the distribution network. First, we introduce an improved dynamic carbon emission factor for the distribution network, which serves as a guiding signal to provide reference for users' low-carbon electricity consumption. Next, we develop two distinct demand response models: one for industrial users aimed at minimizing scheduling costs while reducing carbon emissions, and another for residential users focused on electricity satisfaction and low-carbon satisfaction. Finally, simulations are conducted using an improved IEEE-33 node distribution system. The results indicate that the proposed scheduling model effectively reduces carbon emissions in the distribution network and enhances the integration of photovoltaic resources.

关键词： Photovoltaic systems Job shop scheduling costs Electricity Power system dynamics distribution networks Carbon dioxide dynamic scheduling demand response Load modeling

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Beta-phase transformation of polyvinylidene fluoride with supersonically sprayed ZnSnO_(3) cuboids for flexible piezoelectric nanogenerators

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Journal of Materials Science & technology 2024年第10期177卷 103-113页

作者： Bhavana Joshi Taegun Kim Woojin Lim Edmund Samue Chanwoo Park Ali Aldalbahi Mohamed El-Newehy Hae-Seok Lee Seongpil An Sam S.Yoon School of Mechanical Engineering Korea UniversitySeoul 02841Republic of Korea Core Component Technology Team Samsung Electronics Co Ltd.Mobile R&D CenterSamsung-roSuwon-siGyeonggi-doRepublic of Korea Energy Environment Policy and Technology Graduate School of Energy and Environment(KU-KIST Green School)Korea UniversitySeoul 02841Republic of Korea Department of Chemistry College of ScienceKing Saud UniversityRiyadh 11451Saudi Arabia SKKU Advanced Institute of Nanotechnology(SAINT) Sungkyunkwan University(SKKU)Suwon 16419Republic of Korea Department of Nano Science and Technology Sungkyunkwan University(SKKU)Suwon 16419Republic of Korea Department of Nano Engineering Sungkyunkwan University(SKKU)Suwon 16419Republic of Korea

Flexible self-powered electromechanical devices,such as piezoelectric nanogenerators(PENGs),which are used in wearable and implantable devices,are emerging as state-of-the-art clean energy *** this study,a scalable supersonic spraying technique was used to prepare flexible piezocomposite films of polyvinylidene fluoride(PVdF)and hydrothermally synthesized ZnSnO_(3)(ZSO)cubes for *** spectra confirmed that the transformation of the α-phase of PVdF to its β-phase was induced by the shear stress generated between the ZSO particles and PVdF polymer during supersonic *** op-timized sample comprising 0.43 g of ZSO cubes and 1 g of PVdF produced a maximum piezopotential of 41.5 V and a short-circuit current,I_(sc),of 52.5 μA.A maximum power density of 50.6 μW cm-2 was ob-tained at a loading resistance of 0.4 MΩ,which matched the impedance of the ***-term tapping and bending cycles of N_(tap)=4200 and N_(bend)=600 yielded piezopotentials of 40.5 and 1.7 V,*** addition,electrical poling for 2 h increased the piezopotential to 52 V owing to the alignment of the ferroelectric dipoles in the PVdF.

关键词： ZnSnO_(3) PVdF composite Perovskite Supersonic cold spray Piezoelectric nanogenerator

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