检索结果-内蒙古大学图书馆

SSRN 2025年

作者： Qin, Xuebing Wang, Xuewen Zhao, Yingying Ye, Shengyun Hilal, Muhammad Zhang, Weibin Guo, Jie College of Physics and Electronics Information Yunnan Key Laboratory of Opto-Electronic Information Technology Key Laboratory of Advanced Technique & Preparation for Renewable Energy Materials-Ministry of Education Yunnan Normal University Kunming650500 China Department of Semiconductor System Engineering Sejong University Seoul05006 Korea Republic of

Highlights● The proposal of the InSb/Janus MoSSe van der Waals heterojunction and the investigation of its electronic structure and optical properties have been conducted.● The InSb/Janus MoSSe van der Waals heterojunction has a bandgap of 0.56 eV, is a direct bandgap semiconductor, and is classified as a Type II heterojunction.● The InSb/Janus MoSSe van der Waals heterojunction exhibits a broad spectral absorption range, spanning from the ultraviolet to the infrared regions.● The InSb/Janus MoSSe van der Waals heterojunction possesses strong light-harvesting capabilities. © 2025, The Authors. All rights reserved.

关键词： Van der Waals forces

来源：评论

学校读者我要写书评

暂无评论

Neural-LAFC: A Neural Learning Adaptive Flight Controller for Tailless Flapping-Wing Robots Under Uncertain Wind Disturbance Conditions

引用

IEEE Transactions on Aerospace and Electronic systems 2025年

作者： Guo, Qingcheng Zhang, Yichen Mou, Jiawang Liu, Wu Wu, Xiaosheng Lu, Jun-Guo Shanghai Jiao Tong University Department of Automation China Key Laboratory of System Control and Information Processing Ministry of Education of China China National Key Laboratory of Advanced Micro and Nano Manufacture Technology Shanghai200240 China Shanghai Jiao Tong University National Key Laboratory of Advanced Micro and Nano Manufacture Technology China Shanghai Jiao Tong University Department of Micro/Nano Electronics School of Electronic Information and Electrical Engineering Shanghai200240 China Designing Institute of Hubei Space Technology Academy Wuhan China Ministry of Education of China Key Laboratory of System Control and Information Processing Shanghai200240 China

Enabling bio-inspired flapping-wing robots (FWRs) to maintain stable flight in windy environments, similar to real flying creatures, is of significant importance. In this work, a neural learning-based adaptive flight controller (Neural-LAFC) is proposed for the attitude and position control of a tailless FWR under uncertain wind conditions. The key approach involves employing a deep neural network (DNN) that incorporates not only attitude information but also instantaneous flapping angles of the wings to learn the aerodynamic torques that cannot be accurately modeled. The training data are obtained from flight experiments conducted with the FWR in a wind tunnel environment. Subsequently, a composite adaptive law is presented to update a set of linear coefficients. These linear coefficients are utilized to blend the pre-trained basis functions to represent the aerodynamic torques. The tracking errors are shown to exponentially converge to a bounded region, as guaranteed by a Lyapunov function. Based on the learning-based attitude controller, we also develop an adaptive controller for position control. Notably, apart from the training phase, the FWR operates without prior knowledge of wind speed. Experimental results demonstrate that the Neural-LAFC successfully achieves the desired attitude stabilization, target point tracking, and path tracking of the FWR in windy conditions. The proposed control scheme also outperforms baseline controllers in wind disturbance suppression, reducing the root mean square position errors by more than 40% when the FWR is subjected to a horizontal wind within the speed of 180 {cm s{-1}}. © 1965-2011 IEEE.

关键词： Wind tunnels

来源：评论

学校读者我要写书评

暂无评论

Joint Angle-Delay Sparse Structured Compressed Sensing for ISAC Channel Estimation

引用

IEEE Transactions on Vehicular Technology 2025年

作者： He, Zeqian He, Ruisi Ai, Bo Zhang, Haoxiang Zhong, Zhangdui Beijing Jiaotong University State Key Laboratory of Advanced Rail Autonomous Operation Beijing100044 China Beijing Jiaotong University School of Electronics and Information Engineering Beijing100044 China Beijing Jiaotong University Frontiers Science Center for Smart High-speed Railway System Beijing100044 China Ministry of Industry and Information Technology China Academy of Industrial Internet Beijing100102 China

In the upcoming 6 G communications, radar sensing will be integrated with communication to support a wide range of application scenarios. However, in complex Integrated Sensing and Communication (ISAC) channels, radar targets and communication scatterers may overlap, leading to similar sparse distributions of the sensing and communication channels in both the angle and delay domains. Additionally, the increasing use of compressed sensing (CS) for estimating communication parameters has given rise to numerous CS algorithms based on the expectation maximization (EM) method. However, due to the unique characteristics of the channel in specific scenarios, designing the channel sparse structure has become a crucial aspect of EM-base algorithm. Therefore, there is an urgent need to develop an appropriate channel sparse structure and design a CS algorithm specifically for the ISAC scenario. In this paper, we address the problem of channel estimation in a time-division duplex multi-input multi-output ISAC system using a bi-static model. We introduce a Joint Angle-Delay Sparse Structure (JADSS) to capture the sparsity characteristics of the ISAC channel in both the angle and delay domains. Furthermore, we design a message passing estimator within the framework of an EM-based double-loop algorithm to estimate the ISAC channel. Through simulations, we demonstrate that the proposed CS algorithm utilizing JADSS achieves competitive error performance. © 1967-2012 IEEE.

关键词： Channel estimation

来源：评论

学校读者我要写书评

暂无评论

The impact of 10 MeV electron irradiation on switching characteristics of SiC MOSFET devices

引用

Microelectronics Reliability 2025年 171卷

作者： Fu, Xianghe Guo, Shuwen Peng, Wenbo Zhao, Xiaolong Zhu, Quanzhe He, Yongning Shaanxi Key Laboratory for Electronic Devices and Advanced Chips The Key Lab of Micro-Nano Electronics and System Integration of Xi'an City School of Microelectronics Faculty of Electronic and Information Engineering Xi'an Jiaotong University Shaanxi Xi'an710049 China Shannxi Advangced Semiconductor Technology Center Co. Ltd. Shaanxi Xi'an710077 China

The rigorous requirements of applications such as deep space exploration, nuclear power plants, and nuclear submarines, pose stringent demands on the radiation resistance of power devices. SiC exhibits excellent radiation resistance compared to Si, while the application of SiC power devices in electron radiation environments still requires further theoretical and experimental refinement. In particular, there is a lack of research on the impact of electron radiation on the switching characteristics of SiC power devices. In this work, we studied the electron radiation effects on the dynamic and static characteristics of SiC VDMOSFET via theoretical modeling, simulation analysis, and 10 MeV irradiation experiments. We further analyzed their radiation damage mechanisms, especially for the damage on the gate structure and drift region. Radiation-induced damage to the gate oxide is the main cause of changes in device characteristics. The experimental results demonstrate a nonlinear correlation between the radiation dose and the threshold voltage of SiC MOSFET devices. With the increase in radiation dose, the switching-on delay time and switching-off voltage/current change rate of the devices decrease, while the switching-off delay time and switching-on voltage/current change rate increase. Consequently, there is a reduction in switching-on losses and an increase in switching-off losses, which affect the thermal generation during the switching process of the device. We also conducted a comparative analysis with Si MOSFET devices. The dynamic and static characteristics of SiC MOSFET devices are found to be less affected by radiation compared to Si MOSFET devices, exhibiting superior radiation resistance. © 2025

关键词： Silicon carbide

来源：评论

学校读者我要写书评

暂无评论

Multiparameter sensitivity analysis of tilt-to-length coupling noise in Taiji test mass interferometer

引用

Journal of Astronomical Telescopes, Instruments, and systems 2025年第1期11卷

作者： Xie, Fei Peng, Xiaodong Tang, Wenlin Zhao, Mengyuan Ma, Xiaoshan UCAS Hangzhou Institute for Advanced Study School of Fundamental Physics and Mathematical Sciences Hangzhou China Chinese Academy of Sciences National Space Science Center Key Laboratory of Electronics and Information Technology for Space System Beijing China University of Chinese Academy of Sciences Beijing China Taiji Laboratory for Gravitational Wave Universe Hangzhou China Key Laboratory of Gravitational Wave Precision Measurement of Zhejiang Province Hangzhou China Xi'an University of Finance and Economics School of Information Xi'an China Chinese Academy of Sciences Institute of Engineering Thermophysics National Key Laboratory of Science and Technology on Advanced Light-duty Gas-turbine Beijing China

Tilt-to-length (TTL) coupling noise is a significant noise source for test mass interferometers in Laser Interferometer Space Antenna or Taiji, but identifying key parameters is a challenge due to the large number of influencing factors and complex interrelationships. Simulation models based on the heterodyne interference process and the signal readout of the test mass interferometer were constructed to generate a dataset containing different parameters and corresponding to the longitudinal path length noise caused by TTL coupling. The eXtreme Gradient Boosting (XGBoost) model was employed to fit the nonlinear relationships between the parameters and TTL coupling noise. Based on the fitting results of the XGBoost model, the sensitivity of single factor and multiple factors was performed using SHapley Additive exPlanation (SHAP) values and attribution value matrix, and the results were validated by the analytical models. Without reducing the fitting accuracy, the parameter dimension was decreased from ∼60 to 11 according to sensitivities, retaining those most relevant to angular misalignment. The results showed that the angle of the test mass, the angle of the beam splitters and mirrors, and the lateral offset of the test mass had a significant impact on TTL coupling noise. The introduction of machine learning methods into the study of TTL coupling contributes to a deeper understanding of noise mechanisms and provides references for optimizing the instrument design of the Taiji program. © 2025 SPIE. All rights reserved.

关键词： Laser interferometry

来源：评论

学校读者我要写书评

暂无评论

A CGAN-LSTM-Based Framework for Time-Varying Non-Stationary Channel Modeling

arXiv

引用

arXiv 2025年

作者： Guo, Keying He, Ruisi Yang, Mi Zhang, Yuxin Ai, Bo Zhang, Haoxiang Han, Jiahui Chen, Ruifeng School of Electronics and Information Engineering Beijing Jiaotong University Beijing100044 China State Key Laboratory of Advanced Rail Autonomous Operation Frontiers Science Center for Smart High-speed Railway System Beijing Jiaotong University Beijing100044 China China Academy of Industrial Internet Ministry of Industry and Information Technology Beijing China Institute of Computing Technology China Academy of Railway Sciences Corporation Limited Beijing100081 China

Time-varying non-stationary channels, with complex dynamic variations and temporal evolution characteristics, have significant challenges in channel modeling and communication system performance evaluation. Most existing methods of time-varying channel modeling focus on predicting channel state at a given moment or simulating short-term channel fluctuations, which are unable to capture the long-term evolution of the channel. This paper emphasizes the generation of long-term dynamic channel to fully capture evolution of non-stationary channel properties. The generated channel not only reflects temporal dynamics but also ensures consistent stationarity. We propose a hybrid deep learning framework that combines conditional generative adversarial networks (CGAN) with long short-term memory (LSTM) networks. A stationarity-constrained approach is designed to ensure temporal correlation of the generated time-series channel. This method can generate channel with required temporal non-stationarity. The model is validated by comparing channel statistical features, and the results show that the generated channel is in good agreement with raw channel and provides good performance in terms of non-stationarity. Copyright © 2025, The Authors. All rights reserved.

关键词： Long Term Evolution (LTE)

来源：评论

学校读者我要写书评

暂无评论

Sidelink Evolution Toward Enhanced Data Rate: Experimental and Simulation Validation

引用

IEEE Transactions on Vehicular Technology 2025年

作者： Kim, Junhyeong Wang, Yiran Yan, Dong Guan, Ke Chung, Heesang Electronics and Telecommunications Research Institute 6G Wireless Access System Research Section Daejeon34129 Korea Republic of Beijing Jiaotong University School of Electronic and Information Engineering Beijing100044 China Beijing Jiaotong University State Key Laboratory of Advanced Rail Autonomous Operation Beijing100044 China

This paper investigates the feasibility of millimeter-wave (mmWave) sidelink (SL) communication in typical urban road scenarios. Initially, recent research and standardization progress on vehicle-to-everything (V2X) communication, with a focus on its operation in mmWave bands, are reviewed. Subsequently, the design and deployment of a mmWave V2X testbed are described, along with experimental evaluation results showcasing its real-world performance. Additionally, the impact of beam management in mmWave SL communication is explored through ray-tracing simulations in a distinct urban road scenario, underscoring its significance. Through both experimental and simulation evaluations, we demonstrate the suitability of mmWave SL for supporting enhanced V2X applications and offer valuable insights into designing beam management for mmWave SL communication in typical urban road environments. © 1967-2012 IEEE.

关键词： Highway administration

来源：评论

学校读者我要写书评

暂无评论

Ray-Tracing Calibration Based on Improved Particle Swarm Optimization in 5.9 GHz Outdoor Scenario

引用

IEEE Antennas and Wireless Propagation Letters 2025年

作者： Li, Zhuoyin He, Ruisi Yang, Mi Qi, Ziyi Zhang, Zhong Ai, Bo Zhang, Haoxiang Han, Jiahui Fan, Jianhua Beijing Jiaotong University State Key Laboratory of Advanced Rail Autonomous Operation the School of Electronics and Information Engineering the Frontiers Science Center for Smart High-speed Railway System Beijing100044 China Master Planning Institute of China Academy of Industrial Internet Ministry of Industry and Information Technology of the People's Republic of China Beijing100804 China National University of Defense Technology Sixty-third Research Institute Nanjing210007 China

Ray-tracing (RT) channel simulation has been widely used for simulating and analyzing propagation of electromagnetic waves in complex environments. The electrical properties of materials play a critical role in RT simulation accuracy and calibration of material is usually required. However, the traditional calibration methods for electrical parameters, such as the genetic algorithm and simulated annealing algorithm, suffer from slow convergence and limited parallelism, making them less suitable for complex scenarios with diverse material categories. This article presents a novel approach for automatic parameter optimization based on particle swarm optimization (PSO) algorithm. The proposed method leverages fast convergence advantage of the PSO algorithm. It incorporates a linearly-varying strategy to gradually reduce inertia weight, and enhances algorithm local search capability. Additionally, random perturbation factors are employed to reassign particles exceeding boundaries, preventing them from being trapped in local optima. Measurements and calibration of 5.9 GHz outdoor channels demonstrate the method, which achieves fairly high accuracy. © 2002-2011 IEEE.

关键词： Channel simulation electromagnetic parameter calibration particle swarm optimization ray-tracing simulation

来源：评论

学校读者我要写书评

暂无评论

New Method to Improve Dynamic Stiffness of Electro-hydraulic Servo systems

引用

Chinese Journal of Mechanical engineering 2013年第5期26卷 997-1005页

作者： BAI Yanhong QUAN Long Key Laboratory of Advanced Transducers and Intelligent Control System of Ministry of Education Taiyuan University of Technology School of Electronics Information Engineering Taiyuan University of Science and Technology

Most current researches working on improving stiffness focus on the application of control *** controller in closed-loop hydraulic control system takes effect only after the controlled position is deviated,so the control action is *** dynamic performance against force disturbance and dynamic load stiffness can’t be improved evidently by advanced control *** this paper,the elementary principle of maintaining piston position unchanged under sudden external force load change by charging additional oil is *** this basis,the conception of raising dynamic stiffness of electro hydraulic position servo system by flow feedforward compensation is put *** a scheme using double servo valves to realize flow feedforward compensation is presented,in which another fast response servo valve is added to the regular electro hydraulic servo system and specially utilized to compensate the compressed oil volume caused by load impact in *** two valves are arranged in parallel to control the cylinder ***,the model of flow compensation is derived,by which the product of the amplitude and width of the valve’s pulse command signal can be *** determination rules of the amplitude and width of pulse signal are concluded by analysis and *** the proposed scheme,simulations and experiments at different positions with different force changes are *** simulation and experimental results show that the system dynamic performance against load force impact is largely improved with decreased maximal dynamic position deviation and shortened settling *** is,system dynamic load stiffness is evidently *** paper proposes a new method which can effectively improve the dynamic stiffness of electro-hydraulic servo systems.

关键词： electro-hydraulic servo system flow feedforward compensation dynamic load stiffness double-valve actuation

来源：评论

学校读者我要写书评

暂无评论

Cs 5D_(5/2)-6F 728 nm Laser Spectroscopy with Single Pumping Laser

引用

Chinese Physics Letters 2017年第3期34卷 53-56页

作者：周琦常鹏媛刘忠征张晓刚祝传文陈景标 School of Optoelectronic Information University of Electronic Science and Technology of China State Key Laboratory of Advanced Optical Communication System and Network Institute of Quantum ElectronicsSchool of Electronics Engineering & Computer SciencePeking University

The sub-Doppler absorption laser spectroscopy at 728nm transition from the 5D5/2 state to the 6F state of cesium with linewidth near 10 MHz is first experimentally performed with indirect pumping from the ground state 6S1/2 to the state 7P3/2 by a 455.5nm diode laser. Using a 455.5nm diode laser as an indirect pump laser, several excited states will be populated due to spontaneous decay from the 7P state. We first implement the sub-Doppler absorption laser spectroscopy at 728nm from the 5D5/2 state to the 6F state when Cs atoms within thermal glass cell decay to the 5D5/2 state. Due to velocity transfer effect, the hyperfine structure of 5D5/2 shows a mixed and complicated pattern but very e/ear structure when the 455.5nm pumping laser is counter-propagating （or co-propagating） with the 728nm probing laser.

关键词： Cs 5D ab length nm Laser Spectroscopy with Single Pumping Laser FADOF

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：