检索结果-内蒙古大学图书馆

A HgTe/ZnO quantum dots vertically stacked heterojunction low dark current photodetector

红外与毫米波学报 2025年第1期44卷 33-39页

作者： HUANG Xin-Ning JIANG Teng-Teng DI Yun-Xiang XIE Mao-Bin GUO Tian-Le LIU Jing-Jing WU Bin-Min SHI Jing-Mei QIN Qiang DENG Gong-Rong CHEN Yan LIN Tie SHENHong MENG Xiang-Jian WANG Xu-Dong CHU Jun-Hao GE Jun WANG Jian-Lu State Key Laboratory of Infrared Physics Shanghai Institute of Technical PhysicsChinese Academy of SciencesShanghai 200083China University of Chinese Academy of Sciences Beijing 100049China Frontier Institute of Chip and System Institute of OptoelectronicsShanghai Frontier Base of Intelligent Optoelectronics and PerceptionFudan UniversityShanghai 200438China Kunming Institute of Physics Kunming 650223China

Colloidal quantum dots(CQDs)are affected by the quantum confinement effect,which makes their bandgap *** characteristic allows these materials to cover a broader infrared spectrum,providing a costeffective alternative to traditional infrared detector ***,thanks to the solution processing properties of quantum dots and their ability to integrate with silicon-based readout circuits on a single chip,infrared detectors based on HgTe CQDs have shown great application ***,facing the challenges of vertically stacked photovoltaic devices,such as barrier layer matching and film non-uniformity,most devices integrated with readout circuits still use a planar structure,which limits the efficiency of light absorption and the effective separation and collection of photo-generated ***,by synthesizing high-quality HgTe CQDs and precisely controlling the interface quality,we have successfully fabricated a photovoltaic detector based on HgTe and ZnO *** a working temperature of 80 K,this detector achieved a low dark current of 5.23×10^(-9)A cm^(-2),a high rectification ratio,and satisfactory detection *** work paves a new way for the vertical integration of HgTe CQDs on silicon-based readout circuits,demonstrating their great potential in the field of high-performance infrared detection.

关键词： colloidal quantum dots photodetector barrier layer heterojunction

来源：评论

学校读者我要写书评

暂无评论

High-Speed Wideband Wavelength-Swept DFB Laser Array Based on REC Technique 22

High-Speed Wideband Wavelength-Swept DFB Laser Array Based o...

引用

22nd International Conference on Optical Communications and Networks, ICOCN 2024

作者： Lv, Yuan Dai, Pan Xia, Haolin Wang, Yu Wang, Jiacheng Fan, Yaqiang Zhang, Jingxuan Liu, Yuan Wang, Feng Chen, Xiangfei Nanjing University-Tongding Joint Lab for large-scale photonic integrated circuits Nanjing University National Laboratory of Solid State Microstructures College of Engineering and Applied Sciences Institute of Optical Communication Engineering Key Laboratory of Intelligent Optical Sensing and Manipulation The Ministry of Education & Engineering Research Center of Precision Photonics Integration and System Application The Ministry of Education Nanjing210093 China

ISBN: (纸本)9798350367652

A wideband fast-sweeping tunable laser array has been designed and fabricated based on reconstruction-equivalent-chirp (REC) technique. The total continuous wavelength tuning range of the multiwavelength laser array is greater than 48 nm with a sweep speed of 5 kHz. By continuous measuring of a fiber Bragg grating (FBG) utilizing the wavelength-swept DFB laser array, it shows a maximum wavelength deviation of less than 2 pm, demonstrating a good wavelength sweeping repeatability. © 2024 IEEE.

关键词： Fiber Bragg gratings

来源：评论

学校读者我要写书评

暂无评论

An ultra-fast demodulation method of identical weak FBG arrays based on multiwavelength REC-DFB laser array integrated with SOAs

An ultra-fast demodulation method of identical weak FBG arra...

引用

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

作者： Wang, Jiacheng Dai, Pan Xu, Kaichuan Liu, Yuan Wang, Yu Ban, Qilu Yang, Shijie Fan, Yaqiang Dong, Junwei Lv, Yuan Wang, Feng Chen, Xiangfei Key Laboratory of Intelligent Optical Sensing and Manipulation of the Ministry of Education Engineering Research Center of Precision Photonics Integration and System Application of the Ministry of Education National Laboratory of Solid State Microstructures College of Engineering and Applied Sciences Institute of Optical Communication Engineering Nanjing University-Tongding Joint Lab for Large-Scale Photonic Integrated Circuits Nanjing University Jiangsu Nanjing210093 China

ISBN: (纸本)9798350379266

An ultra-fast identical weak fiber Bragg gratings (wFBGs) demodulation method based on multiwavelength reconstruction-equivalent-chirp distributed feedback (REC-DFB) laser array and integrated switching semiconductor optical amplifiers (SOAs) is proposed. The REC technique simplifies the grating manufacturing process of DFB lasers while maintaining excellent single-mode operation. Based on the laser array and the on-chip integrated switching SOAs, the system achieves a cyclic pulsed laser output, and can precisely obtain the location and wavelength information of all identical wFBGs by the reflection spectra within each cycle. This system realizes an ultrafast wavelength demodulation rate at 125 kHz which greatly enhancing the demodulation speed of TDM sensing networks. Experimental results show that the system demodulation error over 500 consecutive cycles is less than 5 pm. © 2024 IEEE.

关键词： Semiconductor optical amplifiers

来源：评论

学校读者我要写书评

暂无评论

Prediction of Distributed Photovoltaic Accommodation Capability Based on Ridge Regression 9th

Prediction of Distributed Photovoltaic Accommodation Capabil...

引用

9th Purple Mountain Form on Smart Grid Protection and Control, PMF 2024

作者： Ji, Xingquan Zhang, Bowen Zhang, Yumin Sun, Pengkai Zhang, Xiaofeng Liu, Wei dong Shandong University of Science and Technology Qingdao266590 China Key Laboratory of Power System Intelligent Dispatch and Control Shandong University Jinan250061 China Information and Communication Company State Grid Shandong Electric Power Company Jinan250013 China Qingdao Yihe Electric Group Co. Ltd. Qingdao266510 China

ISBN: (纸本)9789819616701

A prediction method of distributed photovoltaic accommodation capability is proposed based on ridge regression. First, the factors influencing the distributed photovoltaic accommodation capacity are analyzed, and the concept of the contribution degree of distributed photovoltaic accommodation is introduced. The gray relation analysis method is used to evaluate the correlation between different factors and distributed photovoltaic accommodation, and a model of factors affecting distributed photovoltaic accommodation is constructed. Then, a prediction model of distributed photovoltaic accommodation capability is established based on ridge regression. The factors with high photovoltaic accommodation contribution degrees are incorporated in the prediction model. The mapping relationship between the driving factors of distributed photovoltaic accommodation and the prediction model is derived, then the development strategies for future photovoltaic accommodation capacity are formulated. Finally, simulation is performed on the SPSSPRO platform, and the results show that the proposed method can predict the distributed photovoltaic accommodation capability accurately and provide strategic suggestions for improving future photovoltaic accommodation capacity. © state Grid Electric Power 2025.

关键词： Photovoltaics

来源：评论

学校读者我要写书评

暂无评论

A Power Grid Accident Early Warning Method Considering Multi-factor Coupling 17th

A Power Grid Accident Early Warning Method Considering Multi...

引用

17th Annual Conference of China Electrotechnical Society, CES 2022

作者： Hu, Liangping Cong, Wei Xu, Anxin Wei, Zhen Han, Aoyang An, Shuhuai Key Laboratory of Power System Intelligent Dispatch and Control Shandong University Jinan Shandong China Rizhao Power Supply Company Shandong Electric Power Company State Grid Shandong Rizhao China Qingdao Power Supply Company Shandong Electric Power Company State Grid Shandong Qingdao China

ISBN: (纸本)9789819903566

The power grid is an important infrastructure for the development of the national economy and society. It is of great significance to carry out research on the early warning method of power grid accidents to ensure the safe and stable operation of the power grid. In this paper, a power grid accident early warning method considering multi-factor coupling is proposed, based on conditional deep convolutional generative adversarial networks to generate minority class samples to achieve dataset balance. The depth features of the two-dimensional input samples were extracted by using a deep convolutional autoencoder network for the three types of disaster factors: meteorology, equipment and geographical environment. A deep self-encoding network is constructed, and the deep feature splicing of three types of disaster-causing factors is used as input, and a softmax classifier is added to the output layer of the network to construct a multi-factor coupled power grid accident early warning model to realize the prediction and early warning of power grid accidents. Numerical simulations verify the effectiveness and accuracy of the method proposed in this paper. © 2023, Beijing Paike Culture Commu. Co., Ltd.

关键词： Numerical methods

来源：评论

学校读者我要写书评

暂无评论

Fiber Bragg Grating Sensing system Utilizing Fast and Wideband REC-DFB Laser Array 22

Fiber Bragg Grating Sensing System Utilizing Fast and Wideba...

引用

22nd International Conference on Optical Communications and Networks, ICOCN 2024

作者： Fan, Yaqiang Dai, Pan Zhang, Jingxuan Yuan, L. Xia, Haolin Kaichuan, X. Wang, Yu Wang, Jiacheng Liu, Yuan Wang, Feng Chen, Xiangfei Engineering Research Center of Precision Photonics Integration and System Application The Ministry of Education College of Engineering and Applied Sciences Institute of Optical Communication Engineering Nanjing University Key Laboratory of Intelligent Optical Sensing and Manipulation The Ministry of Education National Laboratory of Solid State Microstructures Nanjing University-Tongding Joint Lab for large-scale photonic integrated circuits Nanjing210093 China

ISBN: (纸本)9798350367652

A fast and wideband wavelength-swept laser (WSL) utilizing the reconstruction-equivalent-chirp (REC) technique, integrated with 24 DFB lasers, is proposed and experimentally demonstrated. Additionally, a high-speed FBG sensing system using field-programmable gate arrays (FPGAs) is proposed and demonstrated, achieving stable high-speed sweeping with a wavelength coverage of 50.4 nm and a sweeping frequency of up to 5.85 kHz without mode hopping. The FBG sensing system has a solid-state design without moving parts, enabling real-time, high-speed, and stable monitoring of temperature, pressure, strain, and displacement. Furthermore, the system is cost-effective and anticipated to have diverse industrial applications. © 2024 IEEE.

关键词： Fiber Bragg gratings

来源：评论

学校读者我要写书评

暂无评论

Can Digital Intelligence and Cyber-Physical-Social systems Achieve Global Food Security and Sustainability?

引用

IEEE/CAA Journal of Automatica Sinica 2023年第11期10卷 2070-2080页

作者： Yanfen Wang Mengzhen Kang Yali Liu Juanjuan Li Kai Xue Xiujuan Wang Jianqing Du Yonglin Tian Qinghua Ni Fei-Yue Wang College of Resources and Environment University of Chinese Academy of SciencesBeijing 100049 Beijing Yanshan Earth Critical Zone National Research Station University of Chinese Academy of SciencesBeijing 101408 State Key Laboratory of Tibetan Plateau Earth System Environment and ResourcesInstitute of Tibetan Plateau ResearchChinese Academy of SciencesBeijing 100101China State Key Laboratory of Multimodal Artificial Intelligence Systems Institute of AutomationChinese Academy of Sciences(CASIA)Beijing 100190 School of Artificial Intelligence University of Chinese Academy of SciencesBeijing 100049China School of Grassland Science Beijing Forestry UniversityBeijing 100083China State Key Laboratory of Multimodal Artificial Intelligence Systems Institute of AutomationChinese Academy of SciencesBeijing 100190China State Key Laboratory of Plateau Ecology and Agriculture Qinghai UniversityXining 810016 Key Laboratory of Adaptation and Evolution of Plateau Biota Northwest Institute of Plateau BiologyChinese Academy of SciencesXining 810001 Binzhou Institute of Technology Weiqiao-UCAS Science and Technology ParkBinzhou 256606China Beijing Yanshan Earth Critical Zone National Research Station University of Chinese Academy of SciencesBeijing 101408China Department of Engineering Science Faculty of Innovation EngineeringMacao University of Science and TechnologyMacao 999078 State Key Laboratory of Multimodal Artificial Intelligence Systems Institute of AutomationChinese Academy of Sciences(CASIA)Beijing 100190China Faculty of Innovation Engineering Macao University of Science and TechnologyMacao 999078 Beijing Engineering Research Center of Intelligent Systems and Technology Chinese Academy of SciencesBeijing 100098 State Key Laboratory for Management and Control of Complex Systems Chinese Academy of SciencesBeijing 100190China IEEE

Plants sequester carbon through photosynthesis and provide primary productivity for the ecosystem. However, they also simultaneously consume water through transpiration, leading to a carbon-water balance relationship. Agricultural production can be regarded as a form of carbon sequestration *** the perspective of the natural-social-economic complex ecosystem, excessive water usage in food production will aggravate regional water pressure for both domestic and industrial purposes. Hence, achieving a harmonious equilibrium between carbon and water resources during the food production process is a key scientific challenge for ensuring food security and sustainability. Digital intelligence(DI) and cyber-physical-social systems(CPSS) are emerging as the new research paradigms that are causing a substantial shift in the conventional thinking and methodologies across various scientific fields, including ecological science and sustainability studies. This paper outlines our recent efforts in using advanced technologies such as big data, artificial intelligence(AI), digital twins, metaverses, and parallel intelligence to model, analyze, and manage the intricate dynamics and equilibrium among plants, carbon, and water in arid and semiarid ecosystems. It introduces the concept of the carbon-water balance and explores its management at three levels: the individual plant level, the community level, and the natural-social-economic complex ecosystem level. Additionally, we elucidate the significance of agricultural foundation models as fundamental technologies within this context. A case analysis of water usage shows that, given the limited availability of water resources in the context of the carbon-water balance, regional collaboration and optimized allocation have the potential to enhance the utilization efficiency of water resources in the river basin. A suggested approach is to consider the river basin as a unified entity and coordinate the relationship between the

关键词： Carbon-water balance decision-support digital intelligence(DI) foundation models planning

来源：评论

学校读者我要写书评

暂无评论

Graph Attention Networks Unleashed: A Fast and Explainable Vulnerability Assessment Framework for Microgrids

arXiv

引用

arXiv 2025年

作者： Liu, Wei Zhang, Tao Lin, Chenhui Li, Kaiwen Wang, Rui College of System Engineering the National University of Defense Technology the Xiangjiang Laboratory the Hunan Key Laboratory of Multi-Energy System Intelligent Interconnection Technology HKL-MSI2T Changsha410073 China State Key Laboratory of Power Systems Department of Electrical Engineering Tsinghua University Beijing100084 China

Independent microgrids are crucial for supplying electricity by combining distributed energy resources and loads in scenarios like isolated islands and field combat. Fast and accurate assessments of microgrid vulnerability against intentional attacks or natural disasters are essential for effective risk prevention and design optimization. However, conventional Monte Carlo simulation (MCS) methods are computationally expensive and time-consuming, while existing machine learning-based approaches often lack accuracy and explainability. To address these challenges, this study proposes a fast and explainable vulnerability assessment framework that integrates MCS with a graph attention network enhanced by self-attention pooling (GAT-S). MCS generates training data, while the GAT-S model learns the structural and electrical characteristics of the microgrid and further assesses its vulnerability intelligently. The GAT-S improves explainability and computational efficiency by dynamically assigning attention weights to critical nodes. Comprehensive experimental evaluations across various microgrid configurations demonstrate that the proposed framework provides accurate vulnerability assessments, achieving a mean squared error as low as 0.001, real-time responsiveness within 1 second, and delivering explainable results. Copyright © 2025, The Authors. All rights reserved.

关键词： Microgrids

来源：评论

学校读者我要写书评

暂无评论

Wideband circular-polarized transmitarray for generating a high-purity vortex beam

引用

Frontiers of Information Technology & Electronic Engineering 2023年第6期24卷 927-934页

作者： Liangjie QIU Xiuping LI Zihang QI Wenyu ZHAO Yuhan HUANG State Key Laboratory of Information Photonics and Optical Communications Beijing 100876China MOE Key Laboratory of Universal Wireless Communications Beijing 100876China Beijing Key Laboratory of Work Safety Intelligent Monitoring Beijing 100876China School of Electronic Engineering Beijing University of Posts and TelecommunicationsBeijing 100876China Beijing Institute of Spacecraft System Engineering Beijing 100094China

In this correspondence,a wideband circular-polarized(CP)transmitarray(TA)in the Ka-band is presented for generating a high-purity vortex *** proposed element is composed of two identical combinations separated by an air *** subwavelength structure and double-resonance characteristics ensure the stable phase shift of the element within the 1-dB transmission bandwidth of 28.4%.A square aperture TA fed by a horn antenna is fabricated and *** to the honeycomb arrangement of elements,the mode purity of l=−1 is>0.93 in a wide band from 28.5 to 38 *** measured peak gain is 22.3 dBic,and the 3-dB axial ratio bandwidth is 27.6%.The performance of the proposed antenna demonstrates its potential for high-capacity wireless communication and high-quality radar imaging.

关键词： antenna generating circular

来源：评论

学校读者我要写书评

暂无评论

Conditional diffusion guided by part-level latent for dental crown point cloud generation

Conditional diffusion guided by part-level latent for dental...

引用

2024 International Conference on Image, Signal Processing, and Pattern Recognition, ISPP 2024

作者： Zhang, Ao Shen, Zhen Yang, Jian Fang, Qihang Xiong, Gang Dong, Xisong State Key Laboratory of Multimodal Artificial Intelligence System Beijing Engineering Research Center of Intelligent Systems and Technology Institute of Automation Chinese Academy of Sciences Beijing100190 China School of Artificial Intelligence University of Chinese Academy of Sciences Beijing101408 China Guangdong Engineering Research Center of 3D Printing and Intelligent Manufacturing Cloud Computing Center Chinese Academy of Sciences Dongguan523808 China

ISBN: (纸本)9781510680425

Due to the scarcity of point cloud datasets in a specific domain, utilizing generative model approaches becomes essential for data augmentation. Diffusion models have demonstrated impressive capabilities in data generation through a guided reverse process. In this work, we employ a reverse process of a Markov chain conditioned on shape latent to progressively generate dental crown point cloud from a noise distribution. We propose to map the global shape latent to a set of part-level implicit representations and introduce a cross-attention block to provide geometric structural information for point cloud generation. We conduct a series of experiments on a real dental crown dataset, and the experimental results show certain improvement compared to the baselines, demonstrating the efficacy of our approach. In experiments, we present the capability of our method to generate large-scale dental crown models through unsupervised learning, effectively enriching the existing dental crown dataset. © 2024 SPIE.

关键词： Markov chains

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：