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Study of the Effect of Harmonics and Stress on the Integrated Magnetic Properties of Oriented Silicon Steel Sheets

Progress In Electromagnetics Research B 2023年 102卷 171-187页

作者： Luo, Hanwu Hu, Xingyu Li, Fang Luo, Ao Li, Wenzhen Qin, Ruofeng Yang, Fan State Grid East Inner Mongolia Electric Power Company Tongliao028000 China State Key Laboratory of Power Transmission Equipment & System Security and New Technology Chongqing University Chong-Qing400044 China

The core structure of transformers and reactors is subject to stress and high-frequency excitation during operation. The core structure is made of laminated silicon steel sheets, which are subject to magnetostrictive strain under alternating magnetic fields. To investigate the comprehensive magnetic properties of oriented silicon steel sheets under the in uence of harmonics and stress, this paper builds a magnetic property measurement system for electrical steel and investigates the magnetization and magnetostriction characteristics of oriented silicon steel sheets of type 30SQGD105 under working frequency, harmonic and applied stress conditions. The results show that the effects of harmonics and stress on the hysteresis characteristics of the silicon steel sheet are small, and the effects on the magnetostriction characteristics are large. © (2023). All Rights Reserved.

关键词： Magnetostriction

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ATTENTION-AWARE LAPAROSCOPIC IMAGE DESMOKING NETWORK WITH LIGHTNESS EMBEDDING AND HYBRID GUIDED EMBEDDING

arXiv

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arXiv 2024年

作者： Liu, Ziteng Zhu, Jiahua Liu, Bainan Liu, Hao Gao, Wenpeng Fu, Yili School of Life Science and Technology Harbin Institute of Technology Harbin150080 China State Key Laboratory of Robotics and System Harbin Institute of Technology Harbin150080 China State Key Laboratory of Robotics Shenyang Institute of Automation Shenyang110016 China

This paper presents a novel method of smoke removal from the laparoscopic images. Due to the heterogeneous nature of surgical smoke, a two-stage network is proposed to estimate the smoke distribution and reconstruct a clear, smoke-free surgical scene. The utilization of the lightness channel plays a pivotal role in providing vital information pertaining to smoke density. The reconstruction of smoke-free image is guided by a hybrid embedding, which combines the estimated smoke mask with the initial image. Experimental results demonstrate that the proposed method boasts a Peak Signal to Noise Ratio that is 2.79% higher than the state-of-the-art methods, while also exhibits a remarkable 38.2% reduction in run-time. Overall, the proposed method offers comparable or even superior performance in terms of both smoke removal quality and computational efficiency when compared to existing state-of-the-art methods. This work will be publicly available on http://***/wpgao. Copyright © 2024, The Authors. All rights reserved.

关键词： Smoke

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A Wave Energy Harvester With Vertical Pendulum And Mag-Boost Mechanism

A Wave Energy Harvester With Vertical Pendulum And Mag-Boost...

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Micro and Nanotechnology for Power Generation and Energy Conversion Applications (PowerMEMS)

作者： Tianyi Tang Yunfei Li Heng Zhao Lining Sun Huicong Liu State Key Laboratory of Robotics and System Harbin Institute of Technology Harbin CHINA School of Mechanical and Electrical Engineering Jiangsu Provincial Key Laboratory of Advanced Robotics Soochow University Suzhou CHINA

ISBN: (数字)9798350380200

ISBN: (纸本)9798350380217

This paper presents an ultra-low-frequency and high-power wave energy harvester (WEH). It utilizes a vertical pendulum structure to achieve motion response to ultra-low-frequency wave excitation and then converts the mechanical energy of the pendulum into high-frequency and high-power electrical energy output through the MagBoost Mechanism. The design of WEH ensures stable output even under excitation conditions below 1 Hz. At the excitation frequency of 1.4 Hz and resistance load of $20 \Omega$, the maximum power output can reach 1.16 W with a power density of $0.54 \mathrm{~mW} / \mathrm{cm}^{3}$. The high energy density allows stable power supplementation for ocean observation buoy within a limited volume, thereby enabling long-term, unattended operation of the buoy in remote offshore areas.

关键词： Resistance Power system measurements Density measurement Oceans Frequency conversion Sensor systems Sensors Mechanical energy Wave energy conversion Power generation

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Methane and nitrous oxide emissions from municipal wastewater treatment plants in China:A plant-level and technology-specific study

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Environmental Science and Ecotechnology 2024年第4期20卷 123-130页

作者： Haiyan Li Liangfang You He Du Bowen Yu Lu Lu Bo Zheng Qiang Zhang Kebin He Nanqi Ren School of Civil and Environmental Engineering Harbin Institute of TechnologyShenzhen518055China Shenzhen Key Laboratory of Ecological Remediation and Carbon Sequestration Institute of Environment and EcologyTsinghua Shenzhen International Graduate SchoolTsinghua UniversityShenzhen518055China Ministry of Education Key Laboratory for Earth System Modeling Department of Earth System ScienceTsinghua UniversityBeijing100084China State Key Joint Laboratory of Environment Simulation and Pollution Control School of EnvironmentTsinghua UniversityBeijing100084China

Wastewater treatment is an important source of greenhouse gases(GHGs).Yet large uncertainties remain in the quantification of GHG emissions from municipal wastewater treatment plants(MWWTPs)in China.A high-resolution and technology-specific emission inventory is still lacking to support mitigation strategies of *** we develop a plant-level and technology-based MWWTP emission inventory for China covering 8703 plants and 19 treatment technology categories by compiling and harmonizing the most up-to-date facility-level ***'s methane(CH_(4))and nitrous oxide(N_(2)O)emissions from MWWTPs in 2020 are estimated to be 150.6 Gg and 22.0 Gg,respectively,with the uncertainty range of-30%to 37%and-30%to 26%at 95%confidence *** find an emission inequality across cities,with the richest cities emitting two times more CH_(4)and N_(2)O per capita from municipal wastewater treatment than the poorest *** emitted CH_(4)and N_(2)O are dominated by Anaerobic/Anoxic/Oxic-,Sequencing Batch Reactor-,Oxidation Ditch-,and Anoxic/Oxic-based MWWTPs of less than 20 years *** the relatively young age structure of China's MWWTPs,the committed emissions highlight the importance of reducing on-site GHG emissions by optimization of operating conditions and innovation *** emission differences among our estimates,previous studies,and the Intergovernmental Panel on Climate Change guidelines are largely attributed to the uncertainties in emission factors,implying the urgent need for more plant-integrated measurements to improve the accuracy of emission accounting.

关键词： Methane Nitrous oxide Emissions Municipal wastewater treatment plants

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All-organic modification coating prepared with large-scale atmospheric-pressure plasma for mitigating surface charge accumulation

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Plasma Science and technology 2023年第8期25卷 12-18页

作者：张鹏浩余亮贺大钊唐昕宇陈硕董守龙姚陈果 State Key Laboratory of Power Transmission Equipment&System Security and New Technology Chongqing UniversityChongqing 400044People's Republic of China School of Electrical Engineering Zhengzhou UniversityZhengzhou 450001People's Republic of China

The surface charge accumulation on polymers often leads to surface *** solutions are mainly based on the introduction of inorganic *** high-cost process and low compatibility remain formidable ***,existing researches on all-organic insulation focus on capturing electrons,contrary to alleviating charge ***,an all-organic modification coating was prepared on polystyrene(PS)with the large-scale atmospheric-pressure plasma,which exhibits outperformed function in mitigating surface charge *** surface charge dissipation rate and surface conductivity are promoted by about 1.37 and 9.45 times,*** and experimental results show that this all-organic modification coating has a smaller electron affinity potential compared with *** decrease of electron affinity potential may result in accelerated surface charge decay of PS,which has never been involved in previous ***,this coating also has good reliability in a repeated surface *** facile and large-scale approach brings up a novel idea for surface charge regulation and the manufacture of advanced dielectric polymers.

关键词： atmospheric-pressure plasma polymer surface fiashover surface charge surface modification

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Single-Wavelength 1.9-Tb/s Direct Detection Using TFLN DDMZM and Optical Hilbert Receiver

Single-Wavelength 1.9-Tb/s Direct Detection Using TFLN DDMZM...

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2024 Asia Communications and Photonics Conference, ACP 2024 and International Conference on Information Photonics and Optical Communications, IPOC 2024

作者： Zhu, Yixiao Fang, Xiansong Zhou, Lingjun Zhu, Junbo Li, Yunchen Zhou, Xian Zhong, Kangping Lau, Alan Pak Tao He, Zhixue Wang, Lei Hu, Weisheng Li, Ke Zhang, Fan Pengcheng Laboratory Shenzhen China State Key Laboratory of Advanced Optical Communication System and Networks Shanghai Jiao Tong University Shanghai China State Key Laboratory of Advanced Optical Communication System and Networks School of Electronics Peking University Beijing China University of Science and Technology Beijing Beijing China Photonics Research Institute Department of Electrical and Electronic Engineering The Hong Kong Polytechnic University Hong Kong State Key Laboratory of Advanced Optical Communication System and Networks School of Electronics Shanghai Jiao Tong University Shanghai China State Key Laboratory of Advanced Optical Communication System and Networks Peking University Beijing China

ISBN: (纸本)9798350379266

We propose an optical Hilbert direct detection receiver with an all-pass transfer function for carrier-assisted complex-valued double-sideband signal reception. We experimentally demonstrate single-wavelength line rates at 1.94 Tb/s at 300-m SSMF and 1.84 Tb/s at 10-km SSMF using a >100-GHz thin-film LiNbO3 dual-drive Mach-Zehnder modulator. © 2024 IEEE.

关键词： Optical transfer function

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A New Recursive Composite Adaptive Controller for Robot Manipulators

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Space(Science & technology) 2021年第1期2021卷 77-83页

作者： Jianfei Li Yaobing Wang Zhiyong Liu Xin Jing Chengwei Hu The State Key Laboratory of Management and Control for Complex Systems Institute of AutomationChinese Academy of SciencesBeijing 100190China Beijing Key Laboratory of Intelligent Space Robotic System Technology and Applications Beijing Institute of Spacecraft System EngineeringBeijing 100094China State Key Laboratory of Robotics and System Harbin Institute of TechnologyHarbin 150001China

In this paper,a new recursive implementation of composite adaptive control for robot manipulators is *** investigate the recursive composite adaptive algorithm and prove the stability directly based on the Newton-Euler equations in matrix form,which,to our knowledge,is the first result on this point in the *** proposed algorithm has an amount of computation O(n),which is less than any existing similar algorithms and can satisfy the computation need of the complicated multidegree *** manipulator of the Chinese Space Station is employed as a simulation example,and the results verify the effectiveness of this proposed recursive algorithm.

关键词： Robot manipulators robot

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Dynamic Object Removal of Static 3D Point-Cloud Map Building in Casualty Collection Point

Dynamic Object Removal of Static 3D Point-Cloud Map Building...

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International Conference on Control, Automation, robotics and Vision (ICARCV)

作者： Haidong Wang Wanlei Li Yijie Dai Xiaogang Xiong Yunjiang Lou State Key Laboratory of Robotics and System School of Mechanical Engineering and Automation Harbin Institute of Technology ShenZhen Shenzhen China

ISBN: (数字)9798331518493

ISBN: (纸本)9798331518509

Understanding the environment is crucial for the autonomous navigation of vehicles. Accurately identifying and removing dynamic objects that cause occlusions and noisy pose issues is crucial to the task. The casualty collection point (CCP) is a designated location for treating casualties during disasters. These sites are commonly located in open fields to ensure that the injured receive timely and appropriate care. Therefore, the construction of a 3D map in CCP may encounter additional challenges. In this paper, we introduces a novel algorithm that integrates a learning-based multi-object detection network with a Kalman Filter tracking framework to remove dynamic object traces from the 3D map building, particularly in CCP scenarios, and it redirects attention on the velocity attribute of dynamic objects at the object-level scale. Additionally, we contribute a new dataset specifically designed for the CCP scenario. Comparative experiments conducted on the SemanticKITTI dataset and CCP dataset show that our proposed method achieves the state-of-the-art performance in removing traces of dynamic objects on 3D Map. Dataset is available at https://***/haidongwang96/ccp_dataset.

关键词： Point cloud compression Three-dimensional displays Simultaneous localization and mapping Heuristic algorithms Buildings Object detection Kalman filters Object recognition Noise measurement Vehicle dynamics

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Insights into chemoautotrophic traits of a prevalent bacterial phylum CSP1-3, herein Sysuimicrobiota

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National Science Review 2024年第11期11卷 61-75页

作者： Lan Liu Zheng-Han Lian Ai-Ping Lv Nimaichand Salam Jian-Chao Zhang Meng-Meng Li Wei-Min Sun Sha Tan Zhen-Hao Luo Lei Gao Yang Yuan Yu-Zhen Ming Yu-Ting Ou Yang Yu-Xian Li Ze-Tao Liu Chao-Jian Hu Ying Chen Zheng-Shuang Hua Wen-Sheng Shu Brian P.Hedlund Wen-Jun Li Jian-Yu Jiao State Key Laboratory of Biocontrol Guangdong Provincial Key Laboratory of Plant Stress Biology and Southern Marine Science and Engineering Guangdong Laboratory ZhuhaiSchool of Life Sciences Sun Yat-Sen University National Agri-Food Biotechnology Institute School of Earth System Science Institute of Surface-Earth System Science Tianjin University National-Regional Joint Engineering Research Center for Soil Pollution Control and Remediation in South China Guangdong Key Laboratory of Integrated Agro-Environmental Pollution Control and ManagementInstitute of Eco-Environmental and Soil SciencesGuangdong Academy of Sciences State Key Laboratory of Desert and Oasis Ecology Key Laboratory of Ecological Safety and Sustainable Development in Arid Lands Xinjiang Institute of Ecology and GeographyChinese Academy of Sciences Chinese Academy of Sciences Key Laboratory of Urban Pollutant Conversion Department of Environmental Science and EngineeringUniversity of Science and Technology of China Institute of Ecological Science Guangzhou Key Laboratory of Subtropical Biodiversity and BiomonitoringGuangdong Provincial Key Laboratory of Biotechnology for Plant DevelopmentSchool of Life Sciences South China Normal University Guangdong Provincial Key Laboratory of Chemical Pollution South China Normal University School of Life Sciences University of Nevada Las Vegas Nevada Institute of Personalized Medicine University of Nevada Las Vegas

Candidate bacterial phylum CSP1-3 has not been cultivated and is poorly understood. Here, we analyzed 112 CSP1-3 metagenome-assembled genomes and showed they are likely facultative anaerobes, with 3 of 5 families encoding autotrophy through the reductive glycine pathway(RGP), Wood–Ljungdahl pathway(WLP) or Calvin-Benson-Bassham(CBB), with hydrogen or sulfide as electron donors. Chemoautotrophic enrichments from hot spring sediments and fluorescence in situ hybridization revealed enrichment of six CSP1-3 genera, and both transcribed genes and DNA-stable isotope probing were consistent with proposed chemoautotrophic metabolisms. Ancestral state reconstructions showed that the ancestors of phylum CSP1-3 may have been acetogens that were autotrophic via the RGP, whereas the WLP and CBB were acquired by horizontal gene transfer. Our results reveal that CSP1-3 is a widely distributed phylum with the potential to contribute to the cycling of carbon, sulfur and nitrogen. The name Sysuimicrobiota phy. nov. is proposed.

关键词： Sysuimicrobiota phy. nov facultative anaerobes chemoautotrophic metabolisms

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1.2-Tb/s/λ IM/DD Optical Interconnects with Stokes Vector Receiver

1.2-Tb/s/λ IM/DD Optical Interconnects with Stokes Vector R...

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2024 Asia Communications and Photonics Conference, ACP 2024 and International Conference on Information Photonics and Optical Communications, IPOC 2024

作者： Fang, Xiansong Li, Yunchen Hu, Weisheng Li, Ke Zhu, Yixiao Yang, Chuanchuan He, Zhixue Zhang, Fan Zhou, Lingjun Zhou, Xian Wang, Lei State Key Laboratory of Advanced Optical Communication System and Networks School of Electronics Peking University Beijing China Pengcheng Laboratory Shenzhen China State Key Laboratory of Advanced Optical Communication System and Networks Shanghai Jiao Tong University Shanghai China Beijing Engineering and Technology Research Center for Convergence Networks and Ubiquitous Services University of Science and Technology Beijing Beijing China

We demonstrate the first 1.2Tb/s/λ line rate IM/DD optical interconnects using ultra-high-order modulation and Stokes vector receiver. This achievement utilizes polarization division multiplexing and 154-GBd PS-PAM20... 详细信息

ISBN: (纸本)9798350379266

关键词： Optical interconnects

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