检索结果-内蒙古大学图书馆

Real-time and ultrafast optical pulse quantization based on slicing the supercontinuum

Chinese Optics Letters 2021年第8期19卷 69-74页

作者： Ya Guo Qiang Cai Zhiwei Jia Bingjie Xu Zhensen Gao Qianwu Zhang Ruonan Zhang Adonis Bogris K.Alan Shore Yuncai Wang Pu Li Key Laboratory of Advanced Transducers and Intelligent Control System Ministry of EducationTaiyuan University of TechnologyTaiyuan 030024China School of Information Engineering Guangdong University of TechnologyGuangzhou 510006China Key Laboratory of Specialty Fiber Optics and Optical Access Networks Shanghai UniversityShanghai 200444China School of Electronics and Information Northwestern Polytechnical UniversityXi’an 710072China Science and Technology on Communication Security Laboratory Institute of Southwestern CommunicationChengdu 610041China Department of Informatics and Computer Engineering University of West AtticaAthens 12243Greece School of Electronic Engineering Bangor UniversityWales LL571UTUnited Kingdom

All-optical analog-to-digital conversion is a paramount issue in modern science. How to implement real-time and ultrafast quantization to optical pulses with different intensities in an all-optical domain is a central problem. Here, we report a realtime demonstration of an all-optical quantization scheme based on slicing the supercontinuum in a nonlinear fiber. In comparison with previous schemes through off-line analysis of the power of different optical spectral components in the supercontinuum, this, to the best of our knowledge, is the first demonstration of such functionality online in the time ***, the extinction ratio among the quantized outputs can exceed 10 d B, which further confirms the feasibility of the proposed quantization scheme. The current 3 bit resolution in the proof-of-principle experiment is limited by the current experimental condition, but it can be expected to be greatly enhanced through improving both the spectral width of the generated supercontinuum and the number of filtering channels used.

关键词： all-optical analog-to-digital conversion photonic quantization all-optical signal processing supercontinuum generation

来源：评论

学校读者我要写书评

暂无评论

A Service-Environment-Oriented Shape Reconstruction Method of Vehicle-borne Active Phased Array Antenna

A Service-Environment-Oriented Shape Reconstruction Method o...

引用

IEEE International Conference on Radar

作者： Pengying Xu Xiaoxian Xu Yan Wang Yucheng Teng Congsi Wang Dongming Ge Mingkui Kang Shuai Yuan Xuezi Wang Key Laboratory of Electronic Equipment Structure Design Ministry of Education Xidian University Xi'an China School of Information and Control Engineering Xi'an University of Architecture and Technology Xi'an China Beijing Institute of Spacecraft System Engineering Beijing China No.771 Institute of China Aerospace Science and Technology Corporation Xi'an China China Electronics Technology Group Corporation No.38 Research Institute Hefei China

ISBN: (纸本)9781665468893

Modern electronic equipment has been moving towards large scale and increased complexity. Affected by such factors as complex working environments, the performance of a large number of structures in engineering is degraded or even destroyed. Therefore, structure shape estimation is of great significance. The complexity of the structure, however, makes it impossible for a single deformation evaluation algorithm to evaluate the structure comprehensively and accurately. In this paper, a modal-approximate curve (M-AC) method, using a small amount of strain data, is proposed for block shape estimation of structures. Three typical wind load experiments are carried out on the finite element model (FEM) of the vehicle-borne active phased array antenna, and the effectiveness of the algorithm is verified. Under the wind speed of 28 (m/s), the deformation of antenna front is 104.70 mm and the estimation accuracy of the M-AC method is 87.43%, which is 16.47% higher than that of the modal approach. The results indicate that the estimated displacement is consistent well with the simulation results of the finite element method.

关键词： Phased arrays Shape Estimation Radar Radar antennas Finite element analysis Loaded antennas

来源：评论

学校读者我要写书评

暂无评论

Time consistency technique of multi-aircrafts simulation system for cooperative mission 14

Time consistency technique of multi-aircrafts simulation sys...

引用

14th IEEE Conference on Industrial Electronics and Applications, ICIEA 2019

作者： Han, Jian Shi, Hang Tong, JiaHui Zhang, Qing Li, Jing Beijing Electro-Mechanical Engineering Institute Beijing100074 China Science and Technology on Complex System Control and Intelligent Agent Cooperation Laboratory Beijing100074 China

ISBN: (纸本)9781538694909

Aiming at the problem of time inconsistency problem exposed in multi-aircrafts simulation system during executing cooperative mission, a control solution of time consistency has been proposed to realize the unity of time information. On the basis of thoroughly analyzing the components and features of system, the factors that affect time synchronization are summarized and classified. After embedding a hardware of time synchronization system, a control solution is devised to maintain time consistency. Time synchronization and delay compensation are achieved from two aspects of hardware and software, which provides technical support for the following development and verification of cooperative control technology based on multiaircrafts simulation system. © 2019 IEEE.

关键词： Verification

来源：评论

学校读者我要写书评

暂无评论

Optimization and control for Variable Cycle Engine Based on Grey Wolf Algorithm

引用

IFAC-PapersOnLine 2021年第10期54卷 465-470页

作者： Fang-Jiao Zhao Xian Du Yan-Hua Ma Xi-Ming Sun Kai Wang School of Control Science and Engineering Dalian University of Technology Dalian 116024 China Jiangsu Province Key Laboratory of Aerospace Power System Nanjing 210016 China School of Microelectronics Dalian University of Technology Dalian 116024 China Key Laboratory of Intelligent Control and Optimization for Industrial Equipment of Ministry of Education Dalian University of Technology Dalian 116024 China Dalian Product Quality Inspection and Testing Institute Co. Ltd Dalian 116024 China

The turbine outlet temperature is one of the key performance parameters that affect the usage life of variable cycle engine (VCE). As a potential way to extend the usage life, the lowest turbine outlet temperature performance seeking control is widely applied by adjusting all possible control variables. In this paper, grey wolf optimizer (GWO) is utilized to obtain the optimal control variables sequences, which ensures a lower turbine outlet temperature with unchanged thrust. Besides, all kinds of mechanical and operating limits are also considered under several typical working conditions for VCE. According to the optimized sequences, the lowest turbine outlet temperature closed-loop control mode is constructed based on active disturbance rejection control (ADRC) to realize the multivariable control of the VCE. Moreover, a smooth mode transition is designed from the traditional operational mode to the lowest turbine outlet temperature mode under the typical working conditions. Simulation results illustrate the effectiveness of the multivariable optimization and smooth switching control for the VCE, for the turbine outlet temperature is reduced by 6.08% and 7.08% respectively without and with engine degradation.

关键词： Variable Cycle Engine Active Disturbance Rejection control Multivariable control Performance Seeking control Smooth Mode Switching

来源：评论

学校读者我要写书评

暂无评论

Optimizing Photocatalytic Performance in an Electrostatic-Photocatalytic Air Purification system Through Integration of Triboelectric Nanogenerator and Tesla Valve

SSRN

引用

SSRN 2024年

作者： Li, Xiaoliang Cao, Leo N.Y. Zhang, Ting Fang, Rongkun Ren, Yuqing Chen, Xiangyu Bian, Zhenfeng Li, Hexing MOE Key Laboratory of Resource Chemistry Shanghai Key Laboratory of Rare Earth Functional Materials Shanghai Normal University Shanghai China CAS Center for Excellence in Nanoscience Beijing Key Laboratory of Micro-nano Energy and Sensor Beijing Institute of Nanoenergy and Nanosystems Chinese Academy of Sciences Beijing100083 China School of Nanoscience and Technology University of Chinese Academy of Sciences Beijing100049 China Sino-Dutch R&D Centre for Future Wastewater Treatment Technologies Key Laboratory of Urban Stormwater System and Water Environment Beijing University of Civil Engineering and Architecture Beijing100044 China State Key Laboratory of Pollution Control and Resource Reuse College of Environmental Science and Engineering Tongji University Shanghai200092 China Shanghai University of Electric Power Shanghai China

Increasing the collision frequency between gas molecules and photocatalysts can enhance the removal efficiency of volatile organic compounds (VOCs) and particulate matter (PM) in air. In this study, we propose an Electrostatic-Photocatalytic air purification system, containing Tesla valve, triboelectric nanogenerator (TENG), and photocatalysis parts. The incorporation of Ag@ZnO nanorod array (Ag@ZnO-NR) photocatalysts into the internal baffles of the Tesla valve pipeline effectively enhances the collision probability between air pollutant molecules and photocatalysts, and thus facilitating the removal efficiency of pollutants. Additionally, the high-voltage electricity (~9.0 kV) generated by the TENG facilitates the separation of electron-hole pairs in the photocatalyst, leading to increased production of superoxide radicals (O·-2), hydroxyl radicals (·OH), and holes (h+), thereby enhancing the photocatalytic efficiency. In a 1.8 L space system, we achieved an approximately 97% removal efficiency for toluene within 130 minutes and a similar efficiency for formaldehyde (~200 ppm) within 175 minutes. Additionally, the PM2.5 concentration rapidly decreased from 999 μg·m-3 to 42 μg·m-3 within 6 minutes, alongside with a significantly faster pollutant removal rate compared to conventional methods. By integrating Tesla valves, TENG, and photocatalysis, this combined system presents an efficient and promising approach for addressing indoor air pollution, with potential applications across various settings. © 2024, The Authors. All rights reserved.

关键词： Photocatalysis

来源：评论

学校读者我要写书评

暂无评论

Efficient MedSAMs: Segment Anything in Medical Images on Laptop

arXiv

引用

arXiv 2024年

作者： Ma, Jun Li, Feifei Kim, Sumin Asakereh, Reza Le, Bao-Hiep Nguyen-Vu, Dang-Khoa Pfefferle, Alexander Wei, Muxin Gao, Ruochen Lyu, Donghang Yang, Songxiao Purucker, Lennart Marinov, Zdravko Staring, Marius Lu, Haisheng Dao, Thuy Thanh Ye, Xincheng Li, Zhi Brugnara, Gianluca Vollmuth, Philipp Foltyn-Dumitru, Martha Cho, Jaeyoung Mahmutoglu, Mustafa Ahmed Bendszus, Martin Pflüger, Irada Rastogi, Aditya Ni, Dong Yang, Xin Zhou, Guang-Quan Wang, Kaini Heller, Nicholas Papanikolopoulos, Nikolaos Weight, Christopher Tong, Yubing Udupa, Jayaram K. Patrick, Cahill J. Wang, Yaqi Zhang, Yifan Contijoch, Francisco McVeigh, Elliot Ye, Xin He, Shucheng Haase, Robert Pinetz, Thomas Radbruch, Alexander Krause, Inga Kobler, Erich He, Jian Tang, Yucheng Yang, Haichun Huo, Yuankai Luo, Gongning Kushibar, Kaisar Amankulov, Jandos Toleshbayev, Dias Mukhamejan, Amangeldi Egger, Jan Pepe, Antonio Gsaxner, Christina Luijten, Gijs Fujita, Shohei Kikuchi, Tomohiro Wiestler, Benedikt Kirschke, Jan S. de la Rosa, Ezequiel Bolelli, Federico Lumetti, Luca Grana, Costantino Xie, Kunpeng Wu, Guomin Puladi, Behrus Martín-Isla, Carlos Lekadir, Karim Campello, Victor M. Shao, Wei Brisbane, Wayne Jiang, Hongxu Wei, Hao Yuan, Wu Li, Shuangle Zhou, Yuyin Wang, Bo AI Collaborative Centre University Health Network Department of Laboratory Medicine and Pathobiology University of Toronto Vector Institute Toronto Canada Peter Munk Cardiac Centre University Health Network Toronto Canada Toronto General Hospital Research Institute University Health Network Department of Computer Science University of Toronto University Health Network Vector Institute Toronto Canada University of Science Vietnam National University Ho Chi Minh City Viet Nam Institute of Computer Science University of Freiburg Freiburg Germany School of Medicine and Health Harbin Institute of Technology Harbin China Division of Image Processing Department of Radiology Leiden University Medical Center Leiden Netherlands Department of System and Control Engineering School of Engineering Institute of Science Tokyo Formerly Tokyo Institute of Technology Tokyo Japan Institute for Anthropomatics and Robotics Karlsruhe Institute of Technology Karlsruhe Germany School of Information and Communication Engineering University of Electronic Science and Technology of China Chengdu China School of Electrical Engineering and Computer Science University of Queensland Brisbane Australia School of Cyberspace Hangzhou Dianzi University Hangzhou China Division for Computational Radiology and Clinical AI The Department of Neuroradiology University Hospital Bonn Germany Division for Computational Radiology and Clinical AI The Department of Neuroradiology University Hospital Bonn Germany Department of Neuroradiology Heidelberg University Hospital Heidelberg Germany Division for Computational Radiology and Clinical AI Department of Neuroradiology University Hospital Bonn Germany School of Biomedical Engineering Shenzhen University Shenzhen China School of Biological Science and Medical Engineering Southeast University Nanjing China Department of Urology Cleveland Clinic Cleveland United States Department of Computer Science University of Minnesota Minneapolis United St

Promptable segmentation foundation models have emerged as a transformative approach to addressing the diverse needs in medical images, but most existing models require expensive computing, posing a big barrier to their adoption in clinical practice. In this work, we organized the first international competition dedicated to promptable medical image segmentation, featuring a large-scale dataset spanning nine common imaging modalities from over 20 different institutions. The top teams developed lightweight segmentation foundation models and implemented an efficient inference pipeline that substantially reduced computational requirements while maintaining state-of-the-art segmentation accuracy. Moreover, the post-challenge phase advanced the algorithms through the design of performance booster and reproducibility tasks, resulting in improved algorithms and validated reproducibility of the winning solution. Furthermore, the best-performing algorithms have been incorporated into the open-source software with a user-friendly interface to facilitate clinical adoption. The data and code are publicly available to foster the further development of medical image segmentation foundation models and pave the way for impactful real-world applications. © 2024, CC BY-NC-SA.

关键词： Open source software

来源：评论

学校读者我要写书评

暂无评论

Honeycomb Wet Scrubber For Acidic Gas control: Modeling And Long-term Test Results

Research Square

引用

Research Square 2021年

作者： Le, Thi-Cuc Hong, Gung-Hwa Lin, Guan-Yu Li, Ziyi Pui, David Y.H. Liou, Yi-Ling Wang, Bing-Tsai Tsai, Chuen-Jinn Institute of Environmental Engineering National Chiao Tung University Hsinchu30010 Taiwan Department of Environmental Science and Engineering Tunghai University Taichung407 Taiwan School of Energy and Environmental Engineering University of Science and Technology Beijing Beijing100083 China Mechanical Engineering Department University of Minnesota Minneapolis55415 United States School of Science and Engineering The Chinese University of Hong Kong Shenzhen518000 China Haze Control System Inc. Hsinchu30010 Taiwan Pluto Co. Ltd. Taoyuan320 Taiwan

A laboratory scale, 1.0 CMM wet scrubber packed with water-absorbing honeycomb material (HWS) with a very large geometric surface area of 480 m2 m-3 and a low pressure drop developed in our previous study was shown to achieve a very high removal efficiency for gaseous acidic gases but there were no long-term test data. In this study, the HWS scaled up to operate at 100 CMM flow rate was tested for removing mixed acidic gases at a semiconductor fab for a very long period of 3.5 years. Results showed that the removal efficiency for the mixed gases emitted from the fab always maintained as high as > 95% for HF, CH3COOH, HCl, HNO3, HNO2, and H2SO4 with the inlet concentrations ranging from supper-ppmv to sub-ppmv, respectively, during 3.5-yr period. With water jet cleaning of the honeycomb modules once per year, the pressure drop of the HWS remained to be very low at 0.5-0.8 cmH2O, indicating minimal scaling in the HWS existed. Additionally, the predicted height and removal efficiencies of the HWS were very close to the experimental data. The excellent long-term performance of the HWS warrants its potential applications in many areas in which liquid absorption is the preferred treatment method and the theoretical equations can facilitate the design of the HWS. © 2021, CC BY.

关键词： Pressure drop

来源：评论

学校读者我要写书评

暂无评论

Sliding sequential CVAE with time variant socially-aware rethinking for trajectory prediction

arXiv

引用

arXiv 2021年

作者： Zhou, Hao Ren, Dongchun Yang, Xu Fan, Mingyu Huang, Hai National Key Laboratory of Science and Technology of Underwater Vehicle Harbin Engineering University Harbin China State Key Laboratory of Management and Control for Complex System Institute of Automation Chinese Academy of Sciences Beijing China Research Center for Autonomous Vehicles Meituan Beijing China College of Computer Science Wenzhou University Wenzhou China National Key Laboratory of Science and Technology of Underwater Vehicle Harbin Engineering University Harbin China

Pedestrian trajectory prediction is a key technology in many applications such as video surveillance, social robot navigation, and autonomous driving, and significant progress has been made in this research topic. However, there remain two limitations of previous studies. First, with the continuation of time, the prediction error at each time step increases significantly, causing the final displacement error to be impossible to ignore. Second, the prediction results of multiple pedestrians might be impractical in the prediction horizon, i.e., the predicted trajectories might collide with each other. To overcome these limitations, this work proposes a novel trajectory prediction method called CSR, which consists of a cascaded conditional variational autoencoder (CVAE) module and a socially-aware regression module. The cascaded CVAE module first estimates the future trajectories in a sequential pattern. Specifically, each CVAE concatenates the past trajectories and the predicted points so far as the input and predicts the location at the following time step. Then, the socially-aware regression module generates offsets from the estimated future trajectories to produce the socially compliant final predictions, which are more reasonable and accurate results than the estimated trajectories. Moreover, considering the large model parameters of the cascaded CVAE module, a slide CVAE module is further exploited to improve the model efficiency using one shared CVAE, in a slidable manner. Experiments results demonstrate that the proposed method exhibits improvements over state-of-the-art method on the Stanford Drone Dataset (SDD) and ETH/UCY of approximately 38.0% and 22.2%, respectively. © 2021, CC BY.

关键词： Trajectories

来源：评论

学校读者我要写书评

暂无评论

Enhanced Field Burning Derived Aerosols Across the Southeastern Tibetan Plateau in Spring

SSRN

引用

SSRN 2022年

作者： Xiao, Yangning Xiao, Hongwei Sun, Qibin Zhao, Bei Xiao, Huayun School of Environmental Science and Engineering Shanghai Jiaotong University Shanghai200240 China Jiangxi Province Key Laboratory of the Causes and Control of Atmospheric Pollution Nanchang330013 China School of Water Resources and Environmental Engineering East China University of Technology Nanchang330013 China School of Atmospheric Sciences Guangdong Province Key Laboratory for Climate Change and Natural Disaster Studies Institute of Earth Climate and Environment System Sun Yat-sen University Zhuhai519082 China Beijing100083 China

The Tibetan Plateau is the third pole of the world, regulating the climate of the northern hemisphere. Previous studies suggested that the atmospheric aerosols over Tibetan Plateau were obviously influenced by the BB transported from South and Southeast Asia. Field burning is also an important form of BB in Southeast Asian countries. Every spring there is serious air pollution caused by field burning. However, there are still scientific gaps in the contribution of field burning to surrounding regional aerosols, especially on the Tibetan Plateau. To further identify the influence of field burning on the aerosols over the Southeastern Tibetan Plateau, we collected the PM 2.5 samples and then analyzed the concentrations of TC and TN and their isotope during the March to June on Southeastern Tibetan Plateau. The δ 13 C and δ 15 N results showed that there was no significant difference (p > 0.05) between the field burning and the non-field burning periods. Furthermore, both δ 13 C and δ 15 N values were similar to the BB value, indicated the TC and TN were primarily derived from BB whether field burning or non-field burning periods. The concentrations of TC, and TN (6.5 ± 2.9 µg m -3 , and 1.2 ± 0.4 µg m -3 respectively) during the field burning period (March to April) were significantly higher than during the non-field burning period (4.1 ± 1.7 µg m -3 , p= 0.014;and 0.7 ± 0.3 µg m -3 , p= 0.013, respectively). The active fires data, the smoke surface concentrations, backward trajectory, further indicated that the BB emissions from Southeast Asia during field burning period higher than during non-field burning period. This suggests that high BB emissions had significantly enhanced atmospheric aerosols concentrations and chemical composition in Southeastern Tibetan Plateau during the field burning period. © 2022, The Authors. All rights reserved.

关键词： Isotopes

来源：评论

学校读者我要写书评

暂无评论

Multilayer SOH Equalization Scheme for MMC Battery Energy Storage system

Multilayer SOH Equalization Scheme for MMC Battery Energy St...

引用

作者： Ma, Zhan Gao, Feng Gu, Xin Li, Nan Wu, Qiang Wang, Xiaohui Wang, Xiaolong Key Lab of Power System Intelligent Dispatch and Control of Ministry of Education Shandong University Jinan China State Grid Jinan Power Supply Company Jinan China Electric Power Research Institute State Grid Tianjin Electric Power Company Tianjin China School of Information Science and Engineering Shandong University Jinan China

It is preferable for the retired batteries to balance their states-of-health (SOH) in the battery energy storage system (BESS) since it can prolong the system lifetime and reduce the maintenance burden. So far, the corresponding balancing techniques mainly focus on either the SOH balancing among packs or the SOH balancing of cells inside a pack. This article further proposes the multilayer SOH equalization scheme to equalize all cells' SOHs of large-scale BESS by comprehensively combining the pack SOH balancing strategy and the commercial cell equalization techniques. It is noted that the balancing schemes for pack and cell cannot be simply superimposed since packs and cells have totally different connection modes and are equipped with different types of balancing circuits. In specific, the modular multilevel converter (MMC) is assumed to coordinate the pack and cell SOH equalization schemes, where the charging/discharging power per submodule is properly adjusted according to the extent of cell SOH deviation and the extent of pack SOH deviation together. MATLAB simulation and experimental results of a 10-kWh MMC-BESS prototype verified the performance of the proposed method. © 1986-2012 IEEE.

关键词： Power converters

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：