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17th ACM/IEEE International Symposium on Empirical Software Engineering and Measurement, ESEM 2023

作者： Wang, Yawen Wang, Junjie Zhang, Hongyu Wang, Kairui Wang, Qing State Key Laboratory of Intelligent Game Beijing China Institute of Software Chinese Academy of Sciences Science and Technology on Integrated Information System Laboratory Beijing China University of Chinese Academy of Sciences Beijing China Chongqing University Chongqing China

ISBN: (纸本)9781665452236

BACKGROUND: In an online issue tracking system, e.g., GitHub Issue Tracker, feature requests and the associated comment stream provide valuable crowd-generated knowledge for requirements elicitation. To decide whether a feature request should be accepted or not, stakeholders need to identify the comments for/against the feature and understand the two-sided opinions, which is time- and effort-consuming considering the abundant information embedded in lengthy comment stream per feature request. AIMS: This paper proposes VoteBot for automatically detecting stance (for/against) and summarizing the related opinions on a feature request, which can facilitate the decision making (i.e., voting) of feature requests. To our best knowledge, such an approach is previously unexplored for crowd-based requirements elicitation. METHOD: VoteBot is a relation-aware approach, which incorporates three types of relations among the comments or among the comment sentences to better understand the discussions about feature requests. Specifically, it extracts the reply-to relation among the comments, and incorporates it into a BERT-based classifier for stance detection. It also designs a graph-based ranking algorithm, and incorporates semantic relevance and argumentative relations for stance summarization. RESULTS: The automatic evaluation on 250 feature requests with 6,598 comments from five GitHub projects, and the evaluation with practitioners on five new projects, show the promising results. CONCLUSIONS: VoteBot is effective in stance detection and stance summarization, and potentially useful for understanding feature requests and associated discussions in real-world practice. © 2023 IEEE.

关键词： Decision making

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A Cross-Level Vibration Prediction Method of Ultrasonic Motor Stator Component Under Electron Radiation for Transmission Mechanism

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SSRN 2024年

作者： Guo, Zhibin Yan, Jihong Cao, Liyong Chen, Huazhi State Key Laboratory of Robotics and Systems Harbin Institute of Technology Harbin150001 China Laboratory for Space Environment and Physical Sciences Harbin Institute of Technology Harbin150001 China

In deep space exploration, spacecrafts are exposed to electron radiation for a long mission period, which brings a more prominent effect on the performance of their moving components. However, the current experiment and numerical methods struggle to address the issue owing to accuracy and efficiency limitations, because such influences involve the multi-scale change from material properties to component characteristics. In this paper, the ultrasonic motor stator is selected as the typical component to investigate its vibration characteristics under electron radiation. A cross-level vibration prediction method based on the edge-based smoothed finite element method (ES-FEM) is proposed through constructing the cross-scale change of material property. The cross-scale degeneration model of material mechanical property is established by constructing the correlation between the degradation of molecular chains and mechanical property for exploring the material property. By introducing the gradient smoothing technique, the ES-FEM is developed to investigate the vibration characteristics considering the material property change, offering superior accuracy and efficiency. The experiments of 1.2MeV electron radiation under different electron fluence are carried out, which can be verified for the cross-level transmission of vibration. And the numerical examples also demonstrate that the present method can achieve higher accuracy and efficiency than the traditional ones, while aligning closely with experiment results. © 2024, The Authors. All rights reserved.

关键词： Numerical methods

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Omnidirectional Wireless Power Transfer Based on 2-D Decoupled Combination Coil and Excitation Current Vector Control

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International Journal of Circuit Theory and Applications 2025年第0期

作者： Yao, Xiaodi Guo, Yanjie Wang, Ruimin Wang, Xu Zhang, Yajing Song, Baihao Zhang, Zepeng State Key Laboratory of Intelligent Power Distribution Equipment and System Hebei University of Technology Tianjin China School of Automation Beijing Information Science and Technology University Beijing China

This article presents an excitation current vector control method based on a two-dimensional (2-D) decoupled combination transmitting coil that can generate a three-dimensional (3-D) rotating magnetic field. Through this method, the output power of the omnidirectional wireless power transfer (WPT) system can reach small fluctuations, when the receiving coil rotates at any angle. First, the 2-D combination transmitting coil, consisting of three regular hexagonal coils, is analyzed by the second-order vector potential theory. Then, mutual decoupling among the three regular hexagonal coils is achieved at a specific coil overlapping distance. Moreover, system equivalent circuit model is established, and the relationship between system output power and dual phase shift angles is obtained. Furthermore, an excitation current vector control method is proposed to generate the 3-D rotating magnetic field under different receiving coil rotation conditions. Uniform spatial energy distribution can be obtained through this method, in which the magnetic field amplitude is adjusted by the inverter phase shift angles, and the magnetic field direction is determined by the phase angle differences. Finally, the proposed method is verified based on a developed omnidirectional WPT prototype. Experimental results show that when the receiving coil rotates at any angle, relatively high system transmission efficiencies can be achieved. Meanwhile, the maximum output power fluctuation rate is only 12.3%, which is improved compared to the existing literature. © 2025 John Wiley & Sons Ltd.

关键词： Vectors

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FULLY POLARIZED RADAR TARGET DETECTION AND WAVEFORM OPTIMIZATION UNDER RAINY CONDITION

FULLY POLARIZED RADAR TARGET DETECTION AND WAVEFORM OPTIMIZA...

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IET International Radar Conference 2023, IRC 2023

作者： Li, Xinda Cheng, Xu Ju, Xinjie Wang, Xuesong Li, Jianbing College of Electronic Science and Technology National University of Defense Technology Hunan Changsha410073 China State Key Laboratory of Complex Electromagnetic Environment Effects on Electronics and Information System Hunan Changsha410073 China School of Computer Science and Engineering Wuhan Institute of Technology Wuhan430205 China Hubei Key Laboratory of Intelligent Robot Wuhan430205 China

ISBN: (纸本)9781839539954

Polarization and waveform optimization can significantly improve the detection ability of fully polarized radar. However, in practical scenarios, atmospheric particles frequently induce depolarization effects on radar waves, thereby influencing precise target detection, a phenomenon predominantly observed with raindrop particles. This paper establishes a target detection model for fully polarized radar in rainy condition. Subsequently, a joint transceiver iterative optimization algorithm is devised, utilizing the maximum output signal-to-interference plus noise ratio (SINR) of the system as the benchmark, and imposing dual constraints of energy and resemblance on the transmitting waveform. Ultimately, the effectiveness of the proposed method under rainy condition is validated through simulation, and recommendations for engineering applications are provided based on the analysis. © The Institution of Engineering & technology 2023.

关键词： Signal to noise ratio

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Implementation of Multi-Channel TEC Temperature Control system 2

Implementation of Multi-Channel TEC Temperature Control Syst...

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2nd International Conference on Computer Science, Electronic Information Engineering and Intelligent Control technology, CEI 2022

作者： Jiang, Menxue Han, Shuo Ding, Chenyang Academy for Engineering and Technology Fudan University Shanghai China School of Microelectronics Fudan University State Key Laboratory of Asic and System Shanghai China

ISBN: (数字)9781665476164

ISBN: (纸本)9781665476164

This paper develops a thermoelectric cooler (TEC) temperature control system based on the field-programmable gate array (FPGA). Multi-channel analog-to-digital converters (ADCs) acquire temperature data from the temperature sensors, with resolution of 0.002°C. The noises of the acquired data are processed and reduced using the principle of noise correlation, which is realized in an integrated Digital Signal Processing (DSP). Temperature control algorithm is implemented in the FPGA. Control signals are sent to multi-channel digital to analog converters (DACs) to control the current amplifiers, which drive multiple thermal actuators to heat or cool a temperature-sensitive plant. An ARM microcontroller is used to exchange data between DSP and FPGA. Such a system can be used for temperature control of a micro-positioner. © 2022 IEEE.

关键词： Digital to analog conversion

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Charging process simulation of a coil by a self-regulating high-T_(c)superconducting flux pump

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Superconductivity 2023年第3期7卷 77-87页

作者： Pengbo Zhou Yanyu Zhou Mark Ainslie Asef Ghabeli Francesco Grilli Guangtong Ma State Key Laboratory of Rail Transit Vehicle System Southwest Jiaotong UniversityChengdu 610000China Institute for Technical Physics Karlsruhe Institute of TechnologyKarlsruhe 76344Germany Department of Engineering King’s College LondonLondon WC2R 2LSUK

Self‐regulating high‐temperature superconducting(HTS)flux pumps enable direct current injection into a closed‐loop superconducting coil without any electrical *** this work,the process of charging a coil by a self‐regulating HTS flux pump is examined in detail by numerical *** proposed model combines an H‐formulation finite element method(FEM)model with an electrical circuit,enabling a comprehensive evaluation of the overall performance of self‐regulating HTS flux pumps while accurately capturing local *** results indicate that the proposed model can capture all the critical features of a self‐regulating HTS flux pump,including superconducting properties and the impact of the secondary *** the numerical results are compared to the experimental data,the presented model is found to be acceptable both qualitatively and *** on this model,we have demonstrated how the addition of a milliohm range,normal‐conducting secondary resistance in series with the charging loop can improve the charging *** addition,its impact on the charging performance is revealed,including the maximum achievable current,charging speed,and the generated *** modeling approach employed in this study can be generalized to the optimization and design of various types of flux pumps,potentially expediting their practical application.

关键词： Numerical simulation Electrical circuit model High‐temperature superconductor(HTS) Flux pumps H‐formulation HTS coils HTS modeling

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Energy management strategies for hybrid ships and Unmanned Underwater Vehicles 5

Energy management strategies for hybrid ships and Unmanned U...

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2022 5th International Conference on Power Electronics and Control Engineering, ICPECE 2022

作者： Zhang, Mengyao Gu, Haitao Guo, Jianhua School of Chemical Process Automation Shenyang University of Technology China State Key Laboratory of Robotics Shenyang Institute of Automation Chinese Academy of Sciences China Institutes for Robotics and Intelligent Manufacturing Chinese Academy of Sciences China

Both ships and unmanned underwater vehicles (UUVs) have played a great role in the human exploration of the ocean and the investigation of marine resources. Their endurance of them is limited by the onboard energy storage, and the benefits of hybrid ships and UUVs in terms of energy conservation and emission reduction technologies are increasingly clear. The secret to attaining energy conservation while maintaining power performance is energy management. The management of energy for hybrid ships and UUVs are summarized in this work. First, this article includes the state of the art in energy management techniques for autonomous maritime vehicles and hybrid ships. and summarizes the hybrid energy management objectives for different purposes. Second, it analyses the latest progress of hybrid energy management strategies at the present stage and compares the benefits and drawbacks of existing energy management strategies in a comprehensive and in-depth manner. Finally, the paper summarizes their shortcomings and provides an outlook on the future development of hybrid energy management strategies. © Published under licence by IOP Publishing Ltd.

关键词： Energy management

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4‑Terminal Inorganic Perovskite/Organic Tandem Solar Cells Offer 22%Efficiency

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Nano-Micro Letters 2023年第2期15卷 172-181页

作者： Ling Liu Hanrui Xiao Ke Jin Zuo Xiao Xiaoyan Du keyou Yan Feng Hao Qinye Bao Chenyi Yi Fangyang Liu Wentao Wang Chuantian Zuo Liming Ding Center for Excellence in Nanoscience(CAS) Key Laboratory of Nanosystem and Hierarchical Fabrication(CAS)National Center for Nanoscience and TechnologyBeijing 100190People’s Republic of China School of Metallurgy and Environment Central South UniversityChangsha 410083People’s Republic of China School of Physics State Key Laboratory of Crystal MaterialsShandong UniversityJinan 250100People’s Republic of China School of Environment and Energy South China University of TechnologyGuangzhou 510000People’s Republic of China School of Materials and Energy University of Electronic Science and Technology of ChinaChengdu 610054People’s Republic of China School of Physics and Electronic Science East China Normal UniversityShanghai 200241People’s Republic of China State Key Laboratory of Power System Department of Electrical EngineeringTsinghua UniversityBeijing 100084People’s Republic of China School of Materials Science and Engineering Zhejiang Sci-Tech UniversityHangzhou 310018People’s Republic of China Key Laboratory of Semiconductor Materials Science Beijing Key Laboratory of Low Dimensional Semiconductor Materials and DevicesInstitute of SemiconductorsChinese Academy of SciencesBeijing 100083People’s Republic of China

After fast developing of single-junction perovskite solar cells and organic solar cells in the past 10 years,it is becoming harder and harder to improve their power conversion *** solar cells are receiving more and more attention because they have much higher theoretical efficiency than single-junction solar *** device performance has been achieved for perovskite/silicon and perovskite/perovskite tandem solar cells,including 2-terminal and 4-terminal ***,very few studies have been done about 4-terminal inorganic perovskite/organic tandem solar *** this work,semi-transparent inorganic perovskite solar cells and organic solar cells are used to fabricate 4-terminal inorganic perovskite/organic tandem solar cells,achieving a power conversion efficiency of 21.25%for the tandem cells with spin-coated perovskite *** using drop-coating instead of spin-coating to make the inorganic perovskite films,4-terminal tandem cells with an efficiency of 22.34%are *** efficiency is higher than the reported 2-terminal and 4-terminal inorganic perovskite/organic tandem solar *** addition,equivalent 2-terminal tandem solar cells were fabricated by connecting the sub-cells in *** stability of organic solar cells under continuous illumination is improved by using semi-transparent perovskite solar cells as filter.

关键词： 4-Terminal tandem solar cells Inorganic perovskite solar cells Organic solar cells Semitransparent Drop-coating

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SceneX: Procedural Controllable Large-scale Scene Generation 39

SceneX: Procedural Controllable Large-scale Scene Generation

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39th Annual AAAI Conference on Artificial Intelligence, AAAI 2025

作者： Zhou, Mengqi Wang, Yuxi Hou, Jun Zhang, Shougao Li, Yiwei Luo, Chuanchen Peng, Junran Zhang, Zhaoxiang University of Chinese Academy of Sciences China Institute of Automation Chinese Academy of Sciences China State Key Laboratory of Multimodal Artificial Intelligence Systems China New Laboratory of Pattern Recognition China Centre for Artificial Intelligence and Robotics Malaysia China University of Geosciences Beijing China Shandong University China University of Science and Technology Beijing China

ISBN: (纸本)157735897X

Developing comprehensive explicit world models is crucial for understanding and simulating real-world scenarios. Recently, Procedural Controllable Generation (PCG) has gained significant attention in large-scale scene generation by enabling the creation of scalable, high-quality assets. However, PCG faces challenges such as limited modular diversity, high expertise requirements, and challenges in managing the diverse elements and structures in complex scenes. In this paper, we introduce a large-scale scene generation framework, SceneX, which can automatically produce high-quality procedural models according to designers' textual descriptions. Specifically, the proposed method comprises two components, PCGHub and PCGPlanner. The former encompasses an extensive collection of accessible procedural assets and thousands of hand-craft API documents to perform as a standard protocol for PCG controller. The latter aims to generate executable actions for Blender to produce controllable and precise 3D assets guided by the user's instructions. Extensive experiments demonstrated the capability of our method in controllable large-scale scene generation, including nature scenes and unbounded cities, as well as scene editing such as asset placement and season translation. Copyright © 2025, Association for the Advancement of Artificial Intelligence (***). All rights reserved.

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Research and Development for the Hurdle Avoidance During Transplanting Manipulation Based on Kinect Vision Processing

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American Journal of Biochemistry and Biotechnology 2022年第4期18卷 370-377页

作者： Chen, Kaikang Yuan, Yanwei Zhao, Bo Zhou, Liming Li, Ruoshi Niu, Kang Xu, Minghan Wang, Changwei Han, Nana Jin, Xin Zheng, Yongjun College of Engineering China Agricultural University Beijing China The State Key Laboratory of Soil Plant and Machine System Technology Chinese Academy of Agricultural Mechanization Sciences Beijing China College of Agricultural Equipment Engineering Henan University of Science and Technology Luoyang China

To avoid damage to plants during the transplanting process, a transplanting method based on the combination of the Kinect machine visual system and the low-damage transplanting end effector was proposed to reduce the damage to the stems and leaves from transplanting end effectors during the transplanting process. The inclined manipulator was designed can avoid the characteristics of the seedling itself during the transplanting process to avoid obstacles. Under the experimental condition, the oblique transplanting manipulator assisted by the Kinect vision processing system achieved 4.70% leaf damage, 16.70% stem bending, 83.45% substrate integrity, and the transplanting quality parameters were 87.36%. The completion time of a single transplant was 8.32±0.4 s, the results proved that the low-damage transplanting manipulator based on the machine vision system can effectively reduce the damage rate of the stems and leaves. This obstacle avoidance transplant method can be extended to seedlings planted in 50 plugs. Research and development for hurdle avoidance during transplanting manipulation based on Kinect vision processing can provide theoretical support for future obstacle avoidance transplantation. © 2022, Science Publications. All rights reserved.

关键词： Motion planning

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