检索结果-内蒙古大学图书馆

International Conference on Wireless Communications and Signal Processing (WCSP)

作者： Xutong Zhang Weiguo Shen Jianliang Xu Zitong Liu Guoru Ding Colledge of Electronic and Information Engineering Nanjing University of Aeronautics and Astronautics Nanjing China Key Laboratory of Dynamic Cognitive System of Electromagnetic Spectrum Space Ministry of Industry and Information Technology Science and Technology on Communication Information Security Control Laboratory No.36 Research Institute of CETC Jiaxing China College of Communication Engineering Army Engineering University Nanjing China

ISBN: (数字)9781728172361

ISBN: (纸本)9781728172378

The medium access control (MAC) protocol identification is of great application value in cognitive radio. In order to realize the MAC protocol identification with high accuracy and avoid manual feature extraction, we convert the sampled data into the form of spectrogram. Then, a graphical scheme which combines the convolutional neural network (CNN) and the spectrogram is proposed. The simulation includes CNN method and support vector machine (SVM) method. It is suggested that the CNN method has better identification performance.

关键词： Media Access Protocol Spectrogram Protocols Support vector machines Time division multiple access Feature extraction Cognitive radio

来源：评论

学校读者我要写书评

暂无评论

Nanocellulose-Derived Hierarchical Carbon Framework-Supported P-Doped MoO2Nanoparticles for Optimizing Redox Kinetics in Lithium–Sulfur Batteries (Adv. Mater. 22/2025)

引用

Advanced Materials 2025年第22期37卷

作者： Mengjiao Shi Xue Han Wen Qu Meihui Jiang Qing Li Feng Jiang Xiang Xu Shinsuke Ifuku Chunlei Zhang Chao Wang Junfeng Hu Liansheng Yang Yuanjun Lin Haipeng Yu Shouxin Liu Jian Li Yiqiang Wu Wenshuai Chen Key Laboratory of Bio-Based Material Science and Technology of the Ministry of Education Northeast Forestry University Harbin 150040 P. R. China Sustainable Functional Biomaterials Lab Department of Wood Science University of British Columbia Vancouver BC V6T 1Z4 Canada Key Lab of Smart Prevention and Mitigation of Civil Engineering Disasters of the Ministry of Industry and Information Technology and Key Lab of Structures Dynamic Behavior and Control of the Ministry of Education Harbin Institute of Technology Harbin 150090 P. R. China Research Institute for Sustainable Humanosphere Kyoto University Uji 611-0011 Japan College of Materials Science and Technology Central South University of Forestry and Technology Changsha 410004 P. R. China

来源：评论

学校读者我要写书评

暂无评论

Observer-Based Adaptive Multi-dimensional Taylor Network control for Nonlinear Systems with Time-Delay

Observer-Based Adaptive Multi-dimensional Taylor Network Con...

引用

Data Driven control and Learning Systems (DDCLS)

作者： Lei Chu Shuhua Zhang Mingxin Wang Shanliang Zhu Yuqun Han School of Mathematics and Physics Qingdao University of Science and Technology Qingdao P. R. China The Research Institute for Mathematics and Interdisciplinary Sciences Qingdao University of Science and Technology Qingdao China College of Electromechanical Engineering Qingdao University of Science and Technology Qingdao P. R. China Key Laboratory of Measurement and Control of Complex Systems of Engineering Ministry of Education Nanjing P. R. China

ISBN: (数字)9781728159225

ISBN: (纸本)9781728159232

In this paper, an observer-based adaptive Multi-dimensional Taylor network (MTN) controller is proposed for strictly feedback nonlinear systems with time-delay and unmeasurable states. MTNs are utilized to approximate the unknown and desired control input signals directly instead of the unknown nonlinear functions. Moreover, a linear state observer is designed for estimating the unmeasured states. Based on the backstepping technique, a novel adaptive MTN control strategy with simple structure and good real time property is proposed. The designed controller can guarantee all the signals of the closed-loop system are bounded and the tracking error converges to a small neighborhood of the origin. Simulation results are given to demonstrate the effectiveness of the proposed method.

关键词： Nonlinear systems Backstepping Observers Closed loop systems Artificial neural networks Adaptive control Stability analysis

来源：评论

学校读者我要写书评

暂无评论

PID Sliding Mode control for Electro-hydraulic Servo System

引用

Journal of Physics: Conference Series 2019年第2期1168卷

作者： Wang Xingxu He Guang Gao Rui Science and Technology on Electromechanical Dynamic Control Laboratory Beijing Institute of Technology Beijing 100081

In general, an advanced control strategy is necessary for electro-hydraulic servo system to obtain fast and accurate system response. A novel control scheme called PID sliding mode control was proposed by combining conventional sliding mode control and PID control strategy. The linear dynamic mode of electro-hydraulic servo system was established precisely. The PID sliding mode control law was deduced in detail. The chattering problem caused by original sliding mode control was weakened by a continuous PID algorithm. The simulation results of electro-hydraulic servo system demonstrated the effectiveness of the proposed method.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Piezoelectric thermoelastic dissipation research of piezoelectric harvester under different vibration 2

Piezoelectric thermoelastic dissipation research of piezoele...

引用

2nd International Conference on Electronic Information technology and Computer Engineering, EITCE 2018

作者： Liu, Yuting Deng, Jiahao Ye, Yong Hou, Zhuo Duan, Zuodong Xu, Sha School of Mechatronical Engineering Beijing Institute of Technology Beijing100081 China Science and Technology on Electromechanical Dynamic Control Laboratory Beijing Institute of Technology Beijing100081 China College of Information Engineering Shenzhen University Shenzhen518060 China National Key Laboratory of Electronic Measurement Technology North University of China Taiyuan030051 China

Piezoelectric materials are widely used to form piezoelectric energy harvesters. Also, the thermoelastic dissipation always influences the energy harvesting efficiency, during the energy harvest process. Therefore, in this paper, we discuss the effect of thermoelastic dissipation on the piezoelectric harvester through numerical calculation, simulation and experiment. The piezoelectric thermoelastic coupling governing equations under different vibration are derived, which are based on the Euler-Bernoulli beam theory, thermal conduction model and piezoelectric field model. Then, the structure frequency shift and thermoelastic damping are studied via numerical calculation and simulation. Meanwhile, we show the influence of the temperature field on the piezoelectric structure under different vibration modes. Furth more, we research the variations of piezoelectric structure thermoelastic dissipation characteristics under different structure geometry sizes. Based on these analyses, the effect of piezoelectric thermoelastic dissipation on the piezoelectric harvester is researched © The Authors, published by EDP sciences, 2018.

关键词： Energy harvesting

来源：评论

学校读者我要写书评

暂无评论

Double-Layered Microcracks Coupled Strain Sensors with High Sensitivity and Wide Working Range

引用

Small (Weinheim an der Bergstrasse, Germany) 2025年 e2412321页

作者： Zihao Wang Cuiyuan Liang Jing Sun Yuanhe Yang Jiaxue Sun Gongwei Tian Dan Yang Qinyi Zhao Hua Liu Cong Ma Xuelin Zhang Yu Wang Ying Jiang Yan Liu Dianpeng Qi MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage School of Chemistry and Chemical Engineering Harbin Institute of Technology Harbin 150001 P. R. China. Neural Engineering Centre Shenzhen Institute of Advanced Technology Chinese Academy of Sciences Shenzhen 518055 China. School of Astronautics Harbin Institute of Technology Harbin 150001 P. R. China. Key Laboratory of Science and Engineering for the Multi-modal Prevention and Control of Major Chronic Diseases Ministry of Industry and Information Technology Zhengzhou Research Institute of Harbin Institute of Technology Zhengzhou 450000 P. R. China. State Key Laboratory of Reliability and Intelligence of Electrical Equipment School of Mechanical Engineering Hebei University of Technology Tianjin 300401 P. R. China. Department of Electromechanical Engineering and Centre for Artificial Intelligence and Robotics University of Macau Macau SAR 999078 P. R. China. National and Local Joint Engineering Laboratory for Synthesis Transformation and Separation of Extreme Environmental Nutrients Harbin 150001 P. R. China.

The flexible strain sensor is a crucial component of wearable technology, offering considerable potential for monitoring physiological signals. Notably, strain sensors based on nanomaterial thin films have gained much attention from researchers due to their excellent performance and ease of preparation. Nevertheless, challenges remain, such as the rapid expansion of cracks in rigid conductive films under strain, which greatly reduces the working range of the sensors. Soft conductive films characterized by small cracks can lead to low sensitivity. This study introduces a novel conductive strategy centered on the double-layered microcracks of gold/PPy (Polypyrrole) composite films. The as-prepared strain sensor exhibits ultrahigh sensitivity with a GF (gauge factor) of ≈3.604 × 10, an expansive working range spanning from 0% to 60%, high strain resolution at 0.02%, and commendable cycling stability. The crack formation and sensing mechanisms are thoroughly investigated, elucidating the key role of the double-layered microcracks in enhancing sensing performance. Ultimately, the practicality of the developed sensors for human health monitoring and human-machine interaction is demonstrated by the accurate detection of vital signs, body motions, weight, and sounds, and the transmission of encrypted messages.

关键词： double‐layered microcracks strain sensors ultrahigh sensitivity wide working range

来源：评论

学校读者我要写书评

暂无评论

Study on Discharge Mechanism and Electromagnetic Radiation Characteristics of Trichel Pulsed Discharge Mode Transition

Study on Discharge Mechanism and Electromagnetic Radiation C...

引用

中国物理学会第二十二届全国静电学术年会

作者： Wang Chuang Chen Xi Tang Kai Li Peng-fei Science and Technology on Electromechanical Dynamic Control Laboratory China Beijing Institute of Technology Beijing 100081People's Republic of China

The Trichel pulse stage is an important stage of negative corona *** the applied voltage increases,there is a significant discharge mode transition process in the Trichel pulse *** this paper,the discharge mechanism and radiation characteristics of different discharge modes of Trichel pulse stage are studied by needle-plate discharge *** characteristics of Trichel pulse current during mode transition were *** the same time,the time-domain waveforms and spectrum characteristics of EM radiation signals are *** discharge mechanism and EM radiation characteristics of the Trichel pulse discharge mode transition process were theoretically *** results show that the Trichel pulse discharge will change from random pulse sequence mode to continuous pulse mode as the applied voltage *** the random pulse sequence mode,the Trichel pulse sequence appears *** randomness of the pulse sequence is due to the random generation of seed *** time domain waveform of EM radiation appears randomly in *** continuous pulse mode,Trichel pulses appear *** field emission caused by a stable cathode sheath is the main reason for maintaining pulse *** EM radiation signals appear *** frequency of the EM radiation signal does not change during the mode *** maximum amplitude of the signal decreases but the average power increases.

关键词： negative corona discharge Trichel pulse mode transition EM radiation

来源：评论

学校读者我要写书评

暂无评论

State estimation for a class of linear systems with quadratic output

arXiv

引用

arXiv 2020年

作者： Theodosis, Dionysios Berkane, Soulaimane Dimarogonas, Dimos V. Dynamic Systems and Simulation Laboratory School of Production Engineering and Management Technical University of Crete Greece Département d’informatique et d’ingénierie Université du Québec en Outaouis GatineauQC Canada Division of Decision and Control Systems School of Electrical Engineering and Computer Science KTH Royal Institute of Technology Sweden

This paper deals with the problem of state estimation for a class of linear time-invariant systems with quadratic output measurements. An immersion-type approach is presented that transforms the system into a state-affine system by adding a finite number of states to the original system. Under suitable persistence of excitation conditions on the input and its higher derivatives, global state estimation is exhibited by means of a Kalman-type observer. A numerical example is provided to illustrate the applicability of the proposed observer design for the problem of position and velocity estimation for a vehicle navigating in the n−dimensional Euclidean space using a single position range measurement. Copyright © 2020, The Authors. All rights reserved.

关键词： State estimation

来源：评论

学校读者我要写书评

暂无评论

Roll angle estimation of guided gun-launched projectile using MEMS angular rate gyro and magnetometer

引用

Journal of Physics: Conference Series 2019年第1期1209卷

作者： R Z Qian G T Xu K H Yang Y Y Xu Science and Technology on Electromechanical Dynamic Control Laboratory 710065 Xi'an China Xi'an Institute of Electromechanical Information Technology Xi'an 710065 China

The previous method to estimate roll angle of guided gun-launched projectile can be completely invalid in case of GPS is disabled in battlefield. To solve that problem, this paper proposes roll angle estimation used MEMS angular rate gyro and magnetometer. Comparing to the previous method with GPS, the addition of magnetometer outputs increases the measurement accuracy, but increases the dimension and nonlinearity of the measurement model. Therefore the Extended Kalman Filter is introduced. Through trajectory simulation, this study indicates that the absolute roll estimation error is less than 7 degrees after 3 seconds in whole flight trajectory, which is completely met the guided system requirement.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Analysis and research of online measurement technology in inner bore of EML 7

Analysis and research of online measurement technology in in...

引用

2017 7th International Workshop on Computer science and Engineering, WCSE 2017

作者： Cao, Ronggang Dong, Erwa Xu, Xiangcai Beijing Institute of Technology Beijing China Science and Technology on Electromechanical Dynamic Control Laboratory China

ISBN: (纸本)9789811136719

With the development of science and technology, as a new concept weapon electromagnetic gun has important strategic significance. In the process of launch, there are some damages including wear, corrosion, gouging and transition for the rail-gun. In order to study damage mechanism of the electromagnetic rail-gun during launch, it is necessary to detect the bore profile of electromagnetic rail-gun. The bore of rail-gun has the structural characteristics of closed, invisible and narrow space makes inconvenience for the measurement of the contour, so the online measurement and analysis of the rail-gun bore is very important. By comparing different methods of measurement, laser triangle method of non-contact is the heart of the way using in this paper. The laser triangle method has the characteristics of high precision and non-contact, and can realize on-line nondestructive measurement of arbitrary cross section of the rail bore. Through the comparison of the ideal contour and the measured profile of the electromagnetic rail-gun, the damage profile can be obtained. Using this bore profile scanner of electromagnetic rail-gun designed by this method, we can get two-dimensional profile images.

关键词： Nondestructive examination

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：