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Assessment Method of Offshore Wind Resource Based on Multi-dimenssiional Indexes system

CSEE Journal of Power and Energy systems 2024年第1期10卷 76-87页

作者： Xiaomei Ma Yongqian Liu Jie Yan Shuang Han Li Li Hang Meng Muhammet Deveci Konstanze Kolle Umit Cali the State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources(NCEPU) School of New EnergyNorth China Electric Power UniversityBeijing 102206China School of Physical and Electronic Information Engineering Qinghai Normal UniversityXiningQinghai 810016China State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources(NCEPU) School of New EnergyNorth China Electric Power UniversityBeijing 102206China the Royal School of Mines Imperial College London.London SW72AZUKand also with Department of Industrial EngineeringTurkish Naval AcademyNational Defence University34940IstanbulTurkey Department of Energy Systems SINTEF Energy ResearchTrondheimNO-7034 Norway Department of Electric Power Engineering Norwegian University of Science and TechnologyTrondheimNO-7491 Norway

Traditional assessment indexes could not fully describe offshore wind resources,for the meteorological properties of offshore are more complex than *** a result,the uncertainty of offshore wind power projects would be increased and final economic benefits would be ***,a study on offshore wind resource assessment is carried out,including three processes of“studying data sources,conducting multidimensional indexes system and proposing an offshore wind resource assessment method based on analytic hierarchy process(AHP).First,measured wind data and two kinds of reanalysis data are used to analyze the characteristics and reliability of data ***,indexes such as effective wind speed occurrence,affluent level occurrence,coefficient of variation,neutral state occurrence have been proposed to depict availability,richness,and stability of offshore wind resources,*** with existing parameters(wind power density,dominant wind direction occurrence,water depth,distance to coast),a multidimensional indexes system has been built and on this basis,an offshore wind energy potential assessment method has been ***,the proposed method is verified by the annual energy production of five offshore wind turbines and practical operating data of four offshore wind farms in *** study also compares the ranking results of the AHP model to two multi-criteria decision making(MCDM)models including weighted aggregated sum product assessment(WASPAS)and multi-attribute ideal real comparative analysis(MAIRCA).Results show the proposed method gains well in practical engineering applications,where the economic score values have been considered based on the offshore reasonable utilization hours of the whole life cycle in China.

关键词： Annual energyproduction aatmospheric stability data sources offshore wind resource wind power density

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PCF-Grasp: Converting Point Completion to Geometry Feature to Enhance 6-DoF Grasp

arXiv

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arXiv 2025年

作者： Cheng, Yaofeng Zha, Fusheng Guo, Wei Wang, Pengfei Zeng, Chao Sun, Lining Yang, Chenguang State Key Laboratory of Robotics and System Harbin Institute of Technology Harbin150001 China Lanzhou University of Technology China Department of Computer Science University of Liverpool LiverpoolL69 3BX United Kingdom

The 6-Degree of Freedom (DoF) grasp method based on point clouds has shown significant potential in enabling robots to grasp target objects. However, most existing methods are based on the point clouds (2.5D points) generated from single-view depth images. These point clouds only have one surface side of the object providing incomplete geometry information, which mislead the grasping algorithm to judge the shape of the target object, resulting in low grasping accuracy. Humans can accurately grasp objects from a single view by leveraging their geometry experience to estimate object shapes. Inspired by humans, we propose a novel 6-DoF grasping framework that converts the point completion results as object shape features to train the 6-DoF grasp network. Here, point completion can generate approximate complete points from the 2.5D points similar to the human geometry experience, and converting it as shape features is the way to utilize it to improve grasp efficiency. Furthermore, due to the gap between the network generation and actual execution, we integrate a score filter into our framework to select more executable grasp proposals for the real robot. This enables our method to maintain a high grasp quality in any camera viewpoint. Extensive experiments demonstrate that utilizing complete point features enables the generation of significantly more accurate grasp proposals and the inclusion of a score filter greatly enhances the credibility of real-world robot grasping. Our method achieves a 17.8% success rate higher than the state-of-the-art method in real-world experiments. Code and videos are available at https://***/ChengYaofeng/PCF-Grasp. Copyright © 2025, The Authors. All rights reserved.

关键词： Geometry

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Anti-Overturning Fully Symmetrical Triboelectric Nanogenerator Based on an Elliptic Cylindrical Structure for All-Weather Blue Energy Harvesting

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Nano-Micro Letters 2022年第7期14卷 342-353页

作者： Dujuan Tan Qixuan Zeng Xue Wang Songlei Yuan Yanlin Luo Xiaofang Zhang Liming Tan Chenguo Hu Guanlin Liu Department of Applied Physics State Key Laboratory of Power Transmission Equipment&System Security and New TechnologyChongqing UniversityChongqing 400044People’s Republic of China Center On Nanoenergy Research School of Physical Science and TechnologyGuangxi UniversityNanningGuangxi 530004People’s Republic of China

Triboelectric nanogenerators(TENGs) have shown promising potential for large-scale blue energy harvesting. However, the lack of reasonable designs has largely hindered TENG from harvesting energy from both rough and tranquil seas. Herein, a fully symmetrical triboelectric nanogenerator based on an elliptical cylindrical structure(EC-TENG) is proposed for all-weather blue energy harvesting. The novel elliptical cylindrical shell provides a unique selfstability, high sensitivity to wave triggering, and most importantly, an anti-overturning capability for the EC-TENG. Moreover, benefiting from its internal symmetrical design, the EC-TENG can produce energy normally, even if it was overturned under a rude oscillation in the rough seas, which distinguishes this work from previous reported TENGs. The working mechanism and output performance are systematically studied. The as-fabricated EC-TENG is capable of lighting 400 light-emitting diodes and driving small electronics. More than that, an automatic monitoring system powered by the EC-TENG can also monitor the water level in real-time and provide an alarm if necessary. This work presents an innovative and reliable approach toward all-weather wave energy harvesting in actual marine environments.

关键词： Anti-overturning Fully symmetrical Elliptic cylindrical Triboelectric nanogenerator Wave energy

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Improved Model Predictive Control with Prescribed Performance for Aggregated Thermostatically Controlled Loads

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Journal of Modern Power systems and Clean Energy 2022年第2期10卷 430-439页

作者： Yang Yu Li Quan Zengqiang Mi Jianbin Lu Shengqiang Chang Yubao Yuan the State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources North China Electric Power UniversityBaodingChina the Innovation Center for Hebei Intelligent Grid Distribution Technology Shijiazhuang Kelin Electric Co.Ltd.ShijiazhuangChina

Aggregate thermostatically controlled loads(AT-CLs)are a suitable candidate for power imbalance on demand side to smooth the power fluctuation of renewable energy.A new control scheme based on an improved bilinear aggregate model of ATCLs is investigated to suppress power ***,the original bilinear aggregate model of ATCLs is extended by the second-order equivalent thermal parameter model to optimize accumulative error over a long time ***,to ensure the control performance of tracking error,an improved model predictive control algorithm is proposed by integrating the Lyapunov function with the error transformation,and theoretical stability of the proposed control algorithm is ***,the simulation results demonstrate that the accuracy of the improved bilinear aggregate model is enhanced;the proposed control algorithm has faster convergence speed and better tracking accuracy in contrast with the Lyapunov function-based model predictive control without the prescribed performance.

关键词： Lyapunov function model predictive control power tracking prescribed performance thermostatically controlled load

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Improved YOLOv5s Network for Traffic Object Detection with Complex Road Scenes 13

Improved YOLOv5s Network for Traffic Object Detection with C...

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13th IEEE International Conference on CYBER technology in Automation, Control, and Intelligent systems, CYBER 2023

作者： Cao, Yi Wang, Yuning Fan, Huijie Dalian University of Technology Faculty of Vehicle Engineering and Mechanics Da Lian China Unit 32681 PLA Tieling China Shenyang Institute of Automation State Key Laboratory of Robotics Chinese Academy of Sciences Shenyang China

ISBN: (纸本)9798350315196

Aiming at the problems of low target detection accuracy and prone to false detection and missed detection in complex traffic scenes, a road target detection algorithm based on improved YOLOv5s is proposed. Firstly, a feature extraction layer based on Spatial Pyramid Pooling(SPP) is adopted for increasing shallow feature receptive fields named as Multi-scale SPP module (M-SPP). M-SPP is designed to fully integrate feature information of different scales for improving feature extraction ability of our network. Secondly, a Global Context Attention Module(GCAM) is proposed, in focusing on important features in channel and spatial dimensions, allowing the network to focus on more useful information. Finally, experimental results show that detection accuracy of the improved YOLOv5s model we proposed on the UA-DETRAC dataset, compared with the original algorithm, improved by 1.83% and 2.54% respectively. Our improved model abtain good detection accuracy while ensuring real-time performance, and solves problem of missed detection and false detection of small targets in complex road scenes to a certain extent. © 2023 IEEE.

关键词： Feature extraction

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Small-size temperature/high-pressure integrated sensor via flip-chip method

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Microsystems & Nanoengineering 2024年第4期10卷 153-162页

作者： Mimi Huang Xiaoyu Wu Libo Zhao Xiangguang Han Yong Xia Yi Gao Zeyu Cui Cheng Zhang Xiaokai Yang Zhixia Qiao Zhikang Li Feng Han Ping Yang Zhuangde Jiang State Key Laboratory for Manufacturing Systems Engineering International Joint Laboratory for Micro/Nano Manufacturing and Measurement TechnologiesXi’an Jiaotong UniversityXi’an 710049China Xi’an Jiaotong University(Yantai)Research Institute for Intelligent Sensing Technology and System Xi’an Jiaotong UniversityXi’an 710049China Shandong Laboratory of Yantai Advanced Materials and Green Manufacturing Yantai 265503China School of Mechanical Engineering Xi’an Jiaotong University710049 Xi’anChina School of Instrument Science and Technology Xi’an Jiaotong University710049 Xi’anChina Chongqing Key Laboratory of Micro-Nano Systems and Intelligent Sensing Chongqing Academician WorkstationChongqing 2011 Collaborative Innovation Center of Micro/Nano Sensing and Intelligent Ecological Internet of ThingsChongqing Technology and Business UniversityNan’an DistrictChongqing 400067China Xi’an Aerospace Yuanzheng Fluid Control Co.Ltd. Xi’an 710049China

Hydraulic technology with smaller sizes and higher reliability trends,including fault prediction and intelligent control,requires high-performance temperature and pressure-integrated *** designs rely on planar wafer-or chip-level integration,which is limited by pressure range,chip size,and low *** propose a small-size temperature/high-pressure integrated sensor via the flip-chip *** pressure and temperature units are arranged vertically,and the sensing signals of the two units are integrated into one plane through silicon vias and gold–gold bonding,reducing the lateral size and improving the efficiency of signal *** flip-chip technique ensures a reliable electrical connection.A square diaphragm with rounded corners is designed and optimised with simulation to sense high pressure based on the piezoresistive *** temperature sensing unit with a thin-film platinum resistor measures temperature and provides back-end high-precision compensation,which will improve the precision of the pressure *** integrated chip is fabricated by MEMS technology and packaged to fabricate the extremely small integrated *** integrated sensor is characterised,and the pressure sensor exhibits a sensitivity and sensitivity drift of 7.97mV/MPa and−0.19%FS in the range of 0–20 MPa and−40 to 120℃.The linearity,hysteresis,repeatability,accuracy,basic error,and zero-time drift are 0.16%FS,0.04%FS,0.06%FS,0.18%FS,±0.23%FS and 0.04%FS,*** measurement error of the temperature sensor and temperature coefficient of resistance is less than±1°C and 3142.997 ppm/℃,*** integrated sensor has broad applicability in fault diagnosis and safety monitoring of high-end equipment such as automobile detection,industrial equipment,and oil drilling platforms.

关键词： size corners sizes

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Heat transfer simulation of optogenetics-LED based on microchannel heat dissipation

Heat transfer simulation of optogenetics-LED based on microc...

引用

2024 International Conference on Optoelectronic Information and Computer Engineering, OICE 2024

作者： Liu, Lusheng Le, Song Zhang, Yuan Zhang, Jing Wang, Aiping Bin, Jianxiong Niu, Lan Zhang, Lihua Kang, Xiaoyang Laboratory for Neural Interface and Brain Computer Interface Engineering Research Center of AI & Robotics Ministry of Education Shanghai Engineering Research Center of AI & Robotics MOE Frontiers Center for Brain Science State Key Laboratory of Medical Neurobiology Institute of AI and Robotics Academy for Engineering & Technology Fudan University Shanghai200433 China Ji Hua Laboratory Guangdong Province Foshan528200 China Yiwu Research Institute of Fudan University Zhejiang Yiwu City322000 China Research Center for Intelligent Sensing Zhejiang Lab Hangzhou311121 China

ISBN: (纸本)9781510682504

Optogenetics technology has greatly promoted the development of neuroscience. Flexible gene manipulation tools and sensitive light activation methods have provided convenience for neural function research. However, the thermal effect generated in the process of light stimulation affects the activation of neurons by optogenetic technology, which makes the results of light-activated light-sensitive proteins to generate neural currents inaccurate. Here, we established an in vivo activation model of LED-based optogenetic technology through simulation and analyzed the thermal effect produced by it. We propose to use microchannels to dissipate heat from implanted devices, reducing the thermal effect of light stimulation for neural activation. Through simulation, we propose the use of the vortex-like and cobweb-like microchannels for heat dissipation, which can control the temperature rise within 0.28K and 0.31K, respectively. © 2024 SPIE.

关键词： Heat losses

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Dynamic analysis and optimization design of in situ skin printing system

Dynamic analysis and optimization design of in situ skin pri...

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2023 IEEE International Conference on Real-Time Computing and robotics, RCAR 2023

作者： Zhu, Huixuan Cui, Guangze Li, Song Gao, Feiyang Shenyang University of Technology Shenyang110870 China Chinese Academy of Sciences State Key Laboratory of Robotics Shenyang Institute of Automation Shenyang110016 China University of Chinese Academy of Sciences Beijing100049 China Chinese Academy of Sciences Institutes for Robotics and Intelligent Manufacturing Shenyang110169 China

ISBN: (纸本)9798350327182

The treatment of large-skin wounds is an urgent clinical problem. The in situ printing of skin technology is expected to realize the treatment of large-area skin wounds. However, the skin printing system studied by our team in the early stage only has a small printing range and cannot treat large-area skin wounds. To expand of printing range, causing a significant increase in system load. Thus dynamic stability of the system is poor, and it cannot realize the stable injection of the printhead. To solve above problems, this study simulates the dynamics of the new-generation printing system based on the Lagrange method. It sets the simulating boundary conditions according to the actual printing motion process for dynamic analysis. The motion stress data of each component is obtained, and the topology of the critical elements is optimized by simulation analysis. Using the data obtained from the simulation, a set of in situ skin printing systems was built to realize 80cm*10cm skin wound treatment, and the equipment ran smoothly. The system treatment range meets the needs of large-area skin wounds, and the printhead can stably inject, laying the foundation for the large-area skin wound treatment experiment. © 2023 IEEE.

关键词： Topology

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Cooperative Control of Dual-Arm Robot of Adaptive Impedance Controller Based on RBF Neural Network 16th

Cooperative Control of Dual-Arm Robot of Adaptive Impedance ...

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16th International Conference on Intelligent robotics and Applications, ICIRA 2023

作者： Zhang, Tongyan Wang, Ting Shao, Shiliang Cao, Zonghan Dou, Xinke Qin, Hongwei School of Artificial Intelligence Shenyang University of Technology Shenyang China State Key Laboratory of Robotics Shenyang Institute of Automation Chinese Academy of Sciences Shenyang China Institutes for Robotics and Intelligent Manufacturing Chinese Academy of Sciences Shenyang China School of Software Shenyang University of Technology Shenyang China School of Information Engineering Shenyang University of Chemical Technology Shenyang China

ISBN: (纸本)9789819964918

Traditional impedance control methods often fail to accurately track force signals in unknown or changing environments, resulting in failure or instability in tasks such as coordinated handling. To solve the above problems, this paper adds the RBF neural network strategy, based on the traditional impedance control. First a model for the contact force between the dual redundant robotic arms and the environment is constructed, and the RBF neural network is used to estimate the stiffness of the changing environment online. Then, a dynamic adaptive force control co-simulation model is established. The change in the contact force is adapted to adjust the parameters of the two-arm impedance model to compensate for unknown environmental changes. Simulation experiments showed that the enhanced impedance control strategy is appropriate for the force-interaction circumstances of the robotic arm within the positional environment, has a stronger durability, enhances the sturdiness of the two-armed working together robot in an environment that shifts, and has a more effective force control effect. © The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd 2023.

关键词： Robotic arms

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Experimental Study on Gas Flow Uniformity in a Diesel Particulate Filter Carrier

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Fluid Dynamics & Materials Processing 2024年第1期20卷 193-204页

作者： Zhengyong Wang Jianhua Zhang Guoliang Su Peixing Yang Xiantao Fan Shuzhan Bai Ke Sun Guihua Wang School of Energy and Power Engineering Shandong UniversityJinan250061China State Key Laboratory of Engines Tianjin UniversityTianjin300072China Weichai Power Emission Solutions Technology Company Limited Weifang261043China China·Shandong·YYO Emission Control System Co. Ltd.Liaocheng252100China

A Diesel Particulate Filter(DPF)is a critical device for diesel engine exhaust products *** using active-regeneration purification methods,on the one hand,a spatially irregular gas flow can produce relatively high local temperatures,potentially resulting in damage to the carrier;On the other hand,the internal temperature field can also undergo significant changes contributing to increase this *** study explores the gas flow uniformity in a DPF carrier and the related temperature behavior under drop-to-idle(DTI)condition by means of bench *** is shown that the considered silicon carbide carrier exhibits good flow uniformity,with a temperature deviation of no more than 2%with respect to the same radius measurement point at the outlet during the regeneration *** the DTI test,the temperature is relatively high within r/2 near the outlet end,where the maximum temperature peak occurs,and the maximum radial temperature gradient is located between r/2 and the *** these quantities grow as the soot load increases,thereby making the risk of carrier burnout ***,it is shown that the soot load limit of the silicon carbide DPF can be extended to 11 g/L,which reduces the frequency of active regeneration by approximately 40%compared to a cordierite DPF.

关键词： DPF flow uniformity DTI silicon carbide carrier soot load

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