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6th Asia Conference on Power and Electrical Engineering, ACPEE 2021

作者： Zhou, Wenting Wang, Xin Hu, Changyue Li, Qing Li, Chunlong Du, Lin Yu, Huizong State Grid Xinjiang Electric Power Co. Ltd State Grid Xinjiang Information and Telecommunication Company Urumqi China Global Energy Inernet Research Institute Co. Ltd Institute of Power Sensing Technology Nanjing China Chongqing University State Key Laboratory of Power Transmission Equipment and System Security and New Technology Chonqing China

ISBN: (纸本)9781728191591

On-site environmental energy harvesting is a key technology to provide the power supply solution of wireless smart sensors. In view of the single energy form of traditional energy harvesting systems at present, the existing multi-source energy harvesting systems have complex control circuit and high loss. A multi-source environmental micro-energy fusion harvesting architecture based on energy harvesting chip ADP5091 was proposed in this paper. Its peripheral circuit is simple and can be independently adapted to the energy forms of different input characteristics, which effectively improves the efficiency of single-channel energy harvesting and the real-time response performance. In the experiment, solar energy and electromagnetic energy were fused to obtain power with two-stage energy storage capacitors. The single-channel energy extraction efficiency is 88% and 84% respectively. Through the DC-DC boost chip, the intermittent power supply to the wind speed sensor is realized. The effectiveness and practicability of the multi-source energy fusion harvesting technology is verified. © 2021 IEEE.

关键词： Energy harvesting

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Improved DGA Pentagon Model for Identifying Discharge and Thermal Faults of Three Element Mixed Oil-paper Insulation Used in Power Transformer

Improved DGA Pentagon Model for Identifying Discharge and Th...

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Advanced Electrical Equipment and Reliable Operation (AEERO), International Conference on

作者： Qing Xu Chenyu Gao Wenyu Ye Jingwen Zhang Ying Li Jian Hao State Key Laboratory of Power Transmission Equipment & System Security and New Technology Chongqing University Chongqing China

ISBN: (纸本)9781665402651

Three-element mixed insulation oil, as a new type of environmental protection insulation oil, is made up of mineral oil, soybean oil and palm oil fatty acid ester (PFAE). Nowadays, 10 kV and 35 kV transformers with mixed insulation oil have been connected to the network. However, the criterion for fault determination of mixed insulation oil transformer has not been established. In current work, the gas generation characteristics of three-element mixed oil-paper insulation system in overheating and partial discharge faults were studied. The results show that H 2 , CH 4 and C${}_system\mathrm{H}_system$ are the main characteristic gases of overheating failure of mixed oil-paper insulation system. H 2 , C${}_system\mathrm{H}_system$ and C${}_system\mathrm{H}_system$ are mainly produced during partial discharge of mixed insulation oil. H 2 , C${}_system\mathrm{H}_system$ and C${}_system\mathrm{H}_system$ are the main characteristic gases of power frequency breakdown fault of mixed insulation oil, while $\mathrm{H}_system, \mathrm{C}_system\mathrm{H}_system$ and C 2 H 2 are the main characteristic gases of power frequency breakdown fault of mixed insulation oil immersed paper. $\mathrm{H}_system, \mathrm{C}_system\mathrm{H}_system$ and C 2 H 2 are the main characteristic gases in the surface flashover discharge fault of the mixed oil-paper insulation system. $\mathrm{H}_system, \mathrm{C}_system\mathrm{H}_system$ and C 2 H 2 are the main characteristic gases of lightning shock breakdown of mixed oil and oil-impregnated paper. Based on dissolved gas analysis (DGA), Duval pentagon fault diagnostic methods of three-element mixed insulation oil was proposed. This paper is beneficial to the further application and popularization of three-element mixed insulation oil.

关键词： Partial discharges Gases Electric breakdown Surface discharges Oils Oil insulation Maintenance engineering

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Chance-constrained Optimal Power-water Flow Considering Load Uncertainties

Chance-constrained Optimal Power-water Flow Considering Load...

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IEEE Conference on Energy Internet and Energy system Integration (EI2)

作者： Zhenyu Wu Mingyi Sun Yu Liang Xia Zhao State Key Laboratory of Power Transmission Equipment & System Security New Technology Chongqing University Chongqing China

ISBN: (纸本)9781665434263

Considering power and water load uncertainties, this paper proposes a chance-constrained optimal power-water flow (CC-OPWF) model of the integrated electricity-water system (IEWS). Uncertainty margins obtained by the Monte Carlo Simulation method (MCS) and the probabilistic power-water flow (P-PWF) analysis are incorporated in the CC-OPWF model to reformulate the CC-OPWF model to a deterministic optimization model, which is solved by the proposed alternative iteration method. The effectiveness of the proposed method is verified by numerical simulations of a sample IEWS composed of the IEEE-14 bus system and a 7-node water system.

关键词： Analytical models Uncertainty system integration Water conservation Probabilistic logic Numerical simulation Numerical models

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Dynamic Stability Analysis and Improved Control Strategy of DFIG system during LVRT

Dynamic Stability Analysis and Improved Control Strategy of ...

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IEEE Conference on Energy Internet and Energy system Integration (EI2)

作者： Peng Sun Jun Yao Sen Huang Yi Luo Xin Fang State Key Laboratory of Power Transmission Equipment & System Security and New Technology Chongqing University Chongqing China

ISBN: (纸本)9781665434263

With the impedance of grid increasing, the risk of interaction between rotor-side current controller loop (RCC) and the phase-locked loop become bigger. The dynamic stability problem of the doubly fed induction generator (DFIG) have become increasingly prominent. Especially inappropriate controller parameters will further induce dynamic instability during low-voltage ride-through (LVRT). Based on the harmonic linearization method, the output impedance model of the DFIG system which consider PLL and internal controller is derived. Then, the interaction degree of the controllers is analyzed under different controller parameters. Moreover, a virtual impedance control method is proposed, which just controls input three phase voltage of PLL, the internal controller parameters and structure are not affected. Finally, the robustness of the proposed method is explored under different rotor speed and voltage dip degree.

关键词： Voltage fluctuations Doubly fed induction generators Rotors system integration Power system stability Stability analysis Robustness

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Metal Binding Pharmacophore Click-Derived Discovery of New Broad-Spectrum Metallo-β-Lactamase Inhibitors

SSRN

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SSRN 2023年

作者： Yan, Yu-Hang Ding, Hao-Sheng Zhu, Kai-Rong Mu, Bin-Song Zheng, Yang Huang, Meng-Yi Zhou, Cong Li, Wen-Fang Wang, Zhenling Wu, Yong Li, Guo-Bo Key Laboratory of Drug-Targeting and Drug Delivery System The Education Ministry and Sichuan Province Sichuan Engineering Laboratory for Plant-Sourced Drug Sichuan Research Center for Drug Precision Industrial Technology West China School of Pharmacy Sichuan University Chengdu610041 China State Key Laboratory of Biotherapy and Cancer Center Collaborative Innovation Center of Biotherapy West China Hospital Sichuan University Chengdu610041 China

The emergence of metallo-β-lactamases (MBLs) confers resistance to almost all the β-lactam antibiotics, including carbapenems. Due to the lack of clinically useful MBL inhibitors, it is currently desirable to discover new inhibitor chemotypes that can potently target multiple clinically relevant MBLs. Herein we report how use of a metal binding pharmacophore (MBP) click derived strategy led to the discovery of new broad-spectrum MBL inhibitors. The initial exploration identified those including phthalic acid, phenylboronic acid and benzyl phosphoric acid as MBPs for structural transformations by azide-alkyne click reactions. The followed structure-activity relationship analyses discovered several potent broad-spectrum MBL inhibitors, of which 73 manifested IC50 values of 0.5 μM, 0.11 μM, 0.64 μM, 0.0012 μM and 0.00012 μM to NDM-1, IMP-1, VIM-1, VIM-2 and VIM-5, respectively. Co-crystallographic studies demonstrated the importance of MBPs in engagement with MBL active site anchor pharmacophore features, and revealed the unusual two-molecule binding modes with IMP-1, highlighting the critical role of the flexible active site loops in the recognition of structurally different substrates/inhibitors. This work provides new MBL inhibitor chemotypes and a MBP click-derived paradigm for inhibitor discovery targeting MBLs as well as other metalloenzymes. © 2023, The Authors. All rights reserved.

关键词： Binding energy

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High-accuracy disposable micro-optical anti-counterfeiting labels based on single-molecule quantum coherence

arXiv

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arXiv 2025年

作者： Han, Shuangping Song, Kai Zan, Pengyu Yu, Changzhi Li, Ao Zhou, Haitao Qin, Chengbing Xiao, Liantuan College of Physics and Optoelectronics Engineering Taiyuan University of Technology Shanxi Taiyuan030024 China Key Laboratory of Advanced Transducers and Intelligent Control System of Ministry of Education Taiyuan University of Technology Taiyuan030024 China Department of Nuclear Medicine The First Hospital of Shanxi Medical University Collaborative Innovation Center of Molecular Imaging Precision Medical Shanxi Medical University Taiyuan030001 China State Key Laboratory of Quantum Optics and Quantum Optics Devices Institute of Laser Spectroscopy Shanxi University Shanxi Taiyuan030006 China

In this work we introduce an innovative approach to single-molecule quantum coherence (SMQC)-based disposable micro-optical anti-counterfeiting labels. This method facilitates the editing and reading of anti-counterfeiting with single molecules used as the anti-counterfeiting information labels. The label is meticulously crafted through inkjet printing technology, while its authentication is achieved via frequency domain imaging. Through a validation process including experimental demonstration, numerical simulation, and neural network analysis, we demonstrate the feasibility of this approach, further validate the integrity of the miniature anti-counterfeiting information storage, and verify the signal extraction accuracy with the recognition accuracy of the labels is consistently above 99.995%. The combination of SMQC-based disposable micro-optical anti-counterfeiting technology is expected to enable more precise preparation of single-molecule-array chips, thus providing a crucial foundation for the advancement of high-tech and smart manufacturing industries. Copyright © 2025, The Authors. All rights reserved.

关键词： Ink jet printing

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A novel contact engineering method for transistors based on two-dimensional materials

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Journal of Materials Science & technology 2021年第10期69卷 15-19页

作者： Yaochen Sheng LuFang Zhang Feng Li Xinyu Chen Zhijian Xie Haiyan Nan Zihan Xu David Wei Zhan Jianhao Chen Yong Pu Shaoqing Xiao Wenzhong Bao State Key Laboratory of ASIC and System Shanghai Institute of Intelligent Electronics&SystemsSchool of MicroelectronicsFudan UniversityShanghai 200433China Engineering Research Center of IoT Technology Applications(Ministry of Education) Department of Electronic EngineeringJiangnan UniversityWuxi 214122China International Center for Quantum Materials School of PhysicsPeking UniversityBeijing 100871China New Energy Technology Engineering Laboratory of Jiangsu Province&School of Science Nanjing University of Posts and TelecommunicationsNanjing 210023China Six Carbon Tech ShenzhenShenzhen 518106China

Contact engineering is of critical importance for two-dimensional(2D)transition metal dichalcogenide(TMD)-based ***,there are only a few solutions to overcome this obstacle because of the complexity of the TMD-contact *** this work,we propose a novel method using a soft plasma treatment followed by the seamless deposition of a metal electrode to reduce the contact resistance of MoS_(2)field effect transistors(FETs).The treated FETs exhibit three times higher mobility than the control FETs without plasma *** soft plasma treatment can remove the facial sulfur atoms and expose the middle Mo atoms so that they come into direct contact with the metal electrode,thus greatly improving the contact ***-principles calculation is also performed to support the experimental *** potentially scalable strategy can be extended to the whole family of TMD based FETs to provide a possible route of device processsing technology for 2D device application.

关键词： Electrical contact resistance MoS_(2) Plasma

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Numerical Study of Flow Boiling Heat Transfer in a Mini-Channel Under Hyper-Gravity

SSRN

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SSRN 2023年

作者： Lu, Wei Zhang, Zhanru Chen, Yujie Yu, Bo Yang, Yanru Wang, Xiaodong State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources North China Electric Power University Beijing102206 China Research Center of Engineering Thermophysics North China Electric Power University Beijing102206 China School of Mechanical Engineering Beijing Key Laboratory of Pipeline Critical Technology and Equipment for Deepwater Oil & Gas Development Beijing Institute of Petrochemical Technology Beijing102617 China Beijing Institute of Aerospace Testing Technology Beijing100074 China

Gravity plays a crucial role in influencing bubble behavior and heat transfer in flow boiling, and its impact can vary significantly in aerospace. Therefore, this study aims to numerically investigate flow boiling heat transfer in a rectangular mini-channel under hyper-gravity conditions, specifically at 12 times the normal gravity. To accomplish this, a coupled volume-of-fluid and level set method (VOSET) is employed, taking into account fluid-solid conjugated heat transfer as well as a nucleus site density model derived from experimental data. By reproducing the flow pattern and heat transfer characteristics under different heat flux and flow rate conditions, the study unveils the effects of hyper-gravity on flow boiling heat transfer. When the flow rate is lower under hyper-gravity conditions, a notable phenomenon occurs wherein numerous bubbles detach from the heating wall and coalesce into a vapor film at the top of the mini-channel due to the large buoyancy. In contrast, under normal gravity, bubbles merge and slide on the heating wall, leading to the formation of a dry patch below. Consequently, hyper-gravity results in a lower wall superheat, and the disparity in average wall superheat between normal and high gravities escalates as the added heat flux rises. Notably, in the hyper-gravity environment, the frequent detachment of bubbles in the middle and downstream sections of the mini-channel leads to an initial increase in wall superheating, followed by a plateau along the flow direction. As the flow rate increases, the inertial force intensifies. However, intriguingly, the discrepancy in flow boiling heat transfer between normal and high gravities does not exhibit a monotonic decrease with the increasing flow rate. The advantage of hyper-gravity in bubble detachment is greatly weakened after the velocity of 1.0 m/s, before that the wall superheat difference between normal and high gravities increases monotonically. © 2023, The Authors. All rights reserved.

关键词： Flow rate

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A Path Planning Algorithm of Spray Robot based on 3D Point Cloud

A Path Planning Algorithm of Spray Robot based on 3D Point C...

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International Conference on Communications, Information system and Computer Engineering (CISCE)

作者： Jubo Yang Minxiu Kong Rundong Wang School of Mechatronics Engineering Harbin Institute of Technology State Key Laboratory of Robotics and System Harbin China

The following topics are dealt with: learning (artificial intelligence); feature extraction; neural nets; diseases; convolutional neural nets; computer aided instruction; power engineering computing; teaching; educati... 详细信息

ISBN: (数字)9781728197616

ISBN: (纸本)9781728197623

关键词： Three-dimensional displays Spraying Robot sensing systems Robots Robot kinematics Covariance matrices Gravity

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An Approach for Multi-Objective Obstacle Avoidance Using Dynamic Occupancy Grid Map 17

An Approach for Multi-Objective Obstacle Avoidance Using Dyn...

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17th IEEE International Conference on Mechatronics and Automation, ICMA 2020

作者： Liu, Yanjie Chen, Jiao Bai, Xinyu Harbin Institute of Technology State Key Laboratory of Robotics and System Harbin Heilongjiang Province China Sinopec International Business Co. Ltd. No. 22 North Chaoyang Gate Street Chaoyang District Beijing China

ISBN: (纸本)9781728164151

Path planning in dynamic environments is an important guarantee for mobile robots to complete navigation tasks safely. However, human motion is unpredictable, changing its speed or direction arbitrarily, and traditional dynamic obstacle avoidance strategies based on object detection require massive computing resources in the prediction step, which reduces the real time characteristics of the system. To address this question, we propose a dynamic obstacle avoidance framework. It defines the environment as a random dynamic system by using dynamic grid maps, and obtains the velocity of multiple objects with low delay under GPU parallel acceleration calculations. Naturally, we introduce the relative velocity into the artificial potential field function. By expanding the data structure of costmaps, the dynamic grid map is effectively connected with the local obstacle avoidance algorithm. Our approach reduces the detour time of the robot and improves the system security. © 2020 IEEE.

关键词： Mobile robots

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