检索结果-内蒙古大学图书馆

Optimization of Sugarcane Seed Cutting Tool Parameters Based on Orthogonal Test

Science technology and Engineering 2025年第13期25卷 5384-5393页

作者： Xu, Hong-Zhen Du, Xiao-Long Liu, Jiao-Di Chen, Qing-Li Shen, Man-Lin Key Laboratory of Advanced Manufacturing and Automation Technology Guilin University of Technology Guilin541006 China College of Mechanical and Control Engineering Guilin University of Technology Guilin541006 China

To address the current situation of low flatness, poor cutting quality and cane bud damage at the cane cutter due to insufficient optimization of the structure and motion parameters and installation coordination of the cutting tool of the cane seed cutter. Finite element cutting simulation tests were conducted using single-factor tests on the distance between the cutting edge and the pivot point of the transport roller, tool drop speed, tool installation offset angle, tool front angle and tool back angle of the cane seed cutter to determine the evaluation indexes affecting the cane seed cutting quality and the trend of the influence of each factor on this index. The significant interaction effect of each factor on the evaluation index was analyzed based on the rotating orthogonal test, and the quadratic polynomial regression model of the orthogonal test results was obtained. Combining the agronomic requirements with the cutting characteristics of the tool, the optimal evaluation index was established, the optimized optimal combination of parameters was obtained, and the cutting section simulation test and bench validation test were conducted. The final selection results are as follows: the distance between the incision and the fulcrum is 177. 944 mm, the tool landing speed is 1. 569 m/ s, the tool installation offset angle is 5. 923°, the tool front angle is 10. 899°, and the tool back angle is 8. 637°. The equivalent stress at the incision site and the sugarcane shoot site are 5. 053 mm and 1. 592 MPa, respectively. The comprehensive analysis error rate is 4. 97%. This study can provide a research basis for the optimization of the structure parameters and installation parameters of sugarcane seed cutting knife and its motion parameters, so as to improve the seed cutting quality of cane. © 2025 Beijing Kexue Jishu yu Gongcheng Zazhishe. All rights reserved.

关键词： Polynomial regression

来源：评论

学校读者我要写书评

暂无评论

Bimanual gesture recognition based on convolution neural network

引用

International Journal of Wireless and Mobile Computing 2020年第4期18卷 311-319页

作者： Wu, Hao Li, Gongfa Sun, Ying Jiang, Guozhang Jiang, Du Key Laboratory of Metallurgical Equipment and Control Technology of Ministry of Education Wuhan University of Science and Technology Wuhan Hubei China Research Centre for Biomimetic Robot and Intelligent Measurement and Control Wuhan University of Science and Technology Wuhan Hubei China Key Laboratory of Metallurgical Equipment and Control Technology of Ministry of Education Institute of Precision Manufacturing Wuhan University of Science and Technology Wuhan Hubei China Research Centre for Biomimetic Robot and Intelligent Measurement and Control Hubei Key Laboratory of Mechanical Transmission and Manufacturing Engineering Wuhan University of Science and Technology Wuhan Hubei China Hubei Key Laboratory of Mechanical Transmission and Manufacturing Engineering Wuhan University of Science and Technology Wuhan Hubei China

Gesture recognition is a key research field in the human-computer interaction. At present, most of researchers focus on one-handed gesture recognition, but do not pay much attention to bimanual (two hands) gesture recognition. This paper presents a deep learning-based solution to tackle the self-occlusion and self-similarity. To solve this problem, this paper uses Kinect to collect many colour and depth images of different gestures, and each gesture contains multiple sample individuals. Colour images and depth images are used to train the recognition model of bimanual gesture respectively, and then the colour image and depth image are fused, and the bimanual gesture recognition model is trained based on colour image and depth image fusion. Then, the bimanual recognition effects of the three models are compared. The experimental results show that, regardless of the single gesture precision or the mean average precision, the bimanual gesture recognition effect of the fused model is better than the gesture recognition models based on either colour image or depth image. Copyright © 2020 Inderscience Enterprises Ltd.

关键词： Deep learning

来源：评论

学校读者我要写书评

暂无评论

A Monitoring Method for the Ice Shape and the Freeze-Thaw Process of Ice Accretion on Transmission Line Based on Circular FBG Plane Principal Strain Sensor

引用

IEEE Sensors Journal 2025年

作者： Qin, Zhuoke Jia, Bin Shen, Xiahui Zhang, Lizhen Lu, Honggang Du, Chao Cui, Liqin Zhang, Li Deng, Xiao Taiyuan University of Technology College of Physics and Optoelectronics Taiyuan030024 China Scientific Research Office of Shanxi Electric Power Technical College Taiyuan030021 China Taiyuan University of Technology College of Physics and Optoelectronics Key Laboratory of Advanced Transducers and Intelligent Control System Ministry of Education Shanxi Key Laboratory of Precision Measurement Physics Taiyuan030024 China

As a key infrastructure for China’s "West-to-East Power Transmission" project, transmission lines (TL) face the threat of ice accretion under complex microclimatic conditions. This study proposes a plane principal strain sensing method based on a fiber Bragg grating circular array, achieving synchronous monitoring of 6 strains (ranging from -2000 to 2000 μΕ) across the TL cross-section. Through finite element simulation experiments, a mapping relationship between the bending of TL and the plane principal strain has been established. After completing the sensor calibration, an experimental platform for the freeze-thaw process of ice accretion on the TL was built. The relationships between ice mass and bending strain, as well as the ice shape on the TL cross-section (C-shaped and circular ice) and plane principal strain, were studied. Furthermore, a BP neural network model was developed to determine the 4 states of the icing process (no ice/freeze/stable/thaw), achieving an accuracy of 91.23%. This study provides effective monitoring of the freeze-thaw process of ice accretion on the TL, offering important technical support for the prevention and control of ice accretion in power grid. © 2001-2012 IEEE.

关键词： Velocity measurement

来源：评论

学校读者我要写书评

暂无评论

A Monitoring Method for the Ice Shape and the Freeze-Thaw Process of Ice Accretion on Transmission Lines Based on Circular FBG Plane Principal Strain Sensor

arXiv

引用

arXiv 2025年

作者： Qin, Zhuoke Jia, Bin Shen, Xiahui Zhang, Lizhen Lu, Honggang Du, Chao Cui, Liqin Zhang, Li Deng, Xiao The College of Physics and Optoelectronics Taiyuan University of Technology Taiyuan030024 China The Scientific Research Office of Shanxi Electric Power Technical College Taiyuan030021 China The College of Physics and Optoelectronics The Key Laboratory of Advanced Transducers and Intelligent Control System Ministry of Education The Shanxi Key Laboratory of Precision Measurement Physics Taiyuan University of Technology Taiyuan030024 China

As a key infrastructure for China's "West-to-East Power Transmission" project, transmission lines (TL) face the threat of ice accretion under complex microclimatic conditions. This study proposes a plane principal strain sensing method based on a fiber Bragg grating circular array, achieving synchronous monitoring of 6 strains (ranging from -2000 to 2000 μΕ) across the TL cross-section. Through finite element simulation experiments, a mapping relationship between the bending of TL and the plane principal strain has been established. After completing the sensor calibration, an experimental platform for the freeze-thaw process of ice accretion on the TL was built. The relationships between ice mass and bending strain, as well as the ice shape on the TL cross-section (C-shaped and circular ice) and plane principal strain, were studied. Furthermore, a BP neural network model was developed to determine the 4 states of the icing process (no ice/freeze/stable/thaw), achieving an accuracy of 91.23%. This study provides effective monitoring of the freeze-thaw process of ice accretion on the TL, offering important technical support for the prevention and control of ice accretion in power grid. Copyright © 2025, The Authors. All rights reserved.

关键词： Thawing

来源：评论

学校读者我要写书评

暂无评论

Longitudinal-flexural composite axe-shaped sandwich piezoelectric ultrasonic transducer designed based on the principle of acoustic black hole

引用

Applied Acoustics 2025年 239卷

作者： Wen, Shihao Xu, Long Gong, Tao Zhang, Haidao Liang, Zhaofeng Yao, Lei College of Metrology and Measurement Engineering China Jiliang University Hangzhou310018 China College of Sciences China Jiliang University Hangzhou310018 China Zhejiang Key Laboratory of Acoustic Intelligent Sensing and Advanced Measurement State Administration for Market Regulation Hangzhou 310018 China Key Laboratory of Acoustics and Vibration Applied Measuring Technology State Administration for Market Regulation Hangzhou 310018 China Institute of Intelligent Manufacturing Technology Shenzhen Polytechnic University Shenzhen 518055 China

Utilizing the excellent performance of curved acoustic black hole (ABH) to capture and focus sound waves, we propose a novel longitudinal-flexural composite vibration axe-shaped sandwich piezoelectric ultrasonic transducer (AUT) with an ABH structure to focus the ultrasonic vibration energy onto the output end of the transducer. The transducer consists of a longitudinal vibration sandwich piezoelectric exciter (axe handle) and a flexural vibration ABH structure (axe head). By utilizing the longitudinal vibration of the handle to excite the second-order bending vibration of the axe, along with the acoustic black hole structure of the axe, the transducer achieves the capture of flexural waves and the concentration of acoustic energy at the tip of the axe. This ultimately generates a high displacement amplitude and high energy region at the output end of the transducer, enhancing its ultrasonic welding performance. An analytical theoretical model for the flexural vibration of the head and the longitudinal vibration of the handle was established using the transfer matrix method (TMM). Finite element simulations and experimental tests were conducted to validate the theoretical calculations. The results indicate that the acoustic black hole structure of the axe-shaped transducer can significantly enhance the displacement and achieve the focusing of acoustic energy at the output end the transducer. © 2025 Elsevier Ltd

关键词： Ultrasonic welding

来源：评论

学校读者我要写书评

暂无评论

Sliding mode controller by using adaptive exponential reaching law based on nonlinear disturbance observer

引用

ISA Transactions 2025年

作者： Liu, Ying Li, Gongfa Du Jiang Yun, Juntong Tao, Bo Jiang, Guozhang Kong, Jianyi Chen, Baojia Key Laboratory of Metallurgical Equipment and Control Technology of Ministry of Education Wuhan University of Science and Technology Wuhan 430081 China Research Center for Biomimetic Robot and Intelligent Measurement and Control Wuhan University of science and Technology Wuhan 430081 China Hubei Key Laboratory of Mechanical Transmission and Manufacturing Engineering Wuhan University of science and Technology Wuhan 430081 China Precision Manufacturing Research Institute Wuhan University of Science and Technology Wuhan 430081 China Hubei Longzhong Laboratory Xiangyang 441000 China Hubei Key Laboratory of Hydroelectric Machinery Design& Maintenance China Three Gorges University Yichang 443002 China

Aiming at the position tracking control problem of flexible jointed manipulator in the uncertainties and external disturbances, this paper proposes an integrated nonlinear disturbance observer (NDOB) and a non-singular fast terminal sliding mode (NFTSM) control method based on adaptive exponential reaching law (AERL). The NDOB is designed to ensure that the time-varying disturbance is suppressed in finite time. The AERL is designed to improve the track tracking speed and reduce the chattering of the control input. Simulation results show that compared with the optimal ARL, the proposed method reduces the trajectory tracking error by 1.3 %, improves the trajectory tracking convergence speed. Experimental results show that the proposed method reduces the trajectory tracking error by 0.545 %. © 2025 ISA

关键词： AERL AERL-NFTSM Chattering Convergence accuracy Flexible jointed manipulator

来源：评论

学校读者我要写书评

暂无评论

Microstructural evolution and mechanical properties of in situ nano Ta_(4)HfC_(5) reinforced SiBCN composite ceramics

引用

Journal of advanced Ceramics 2020年第6期9卷 739-748页

作者： Bingzhu WANG Daxin LI Zhihua YANG Dechang JIA Jingyi GUAN Hao PENG Delong CAI Peigang HE Xiaoming DUAN Yu ZHOU Tao ZHANG Chenguang GAO Institute for Advanced Ceramics School of Materials Science and EngineeringHarbin Institute of TechnologyHarbin 150001China Key Laboratory of Advanced Structural-Functional Integration Materials&Green Manufacturing Technology Harbin Institute of TechnologyHarbin 150001China State Key Laboratory of Advanced Welding and Joining Harbin Institute of TechnologyHarbin 150001China Beijing Institute of Control Engineering Beijing 100080China

The in situ nano Ta_(4)HfC_(5) reinforced SiBCN-Ta_(4)HfC_(5) composite ceramics were prepared by a combination of two-step mechanical alloying and reactive hot-pressing *** microstructural evolution and mechanical properties of the resulting SiBCN-Ta_(4)HfC_(5) were *** the first-step milling of 30 h,the raw materials of TaC and HfC underwent crushing,cold sintering,and short-range interdiffusion to finally obtain the high pure nano Ta_(4)HfC_(5).A hybrid structure of amorphous SiBCN and nano Ta_(4)HfC_(5) was obtained by adopting a second-step *** reactive hot-pressing sintering,amorphous SiBCN has crystallized to 3C-SiC,6H-SiC,and turbostratic BN(C)phases and Ta_(4)HfC_(5) retained the form of the *** the in situ generations of 2.5 wt% Ta_(4)HfC_(5),Ta_(4)HfC_(5) is preferentially distributed within the turbostratic BN(C);however,as Ta_(4)HfC_(5) content further raised to 10 wt%,it mainly distributed in the grain-boundary of BN(C) and *** introduction of Ta_(4)HfC_(5) nanocrystals can effectively improve the flexural strength and fracture toughness of SiBCN ceramics,reaching to 344.1 MPa and 4.52 MPa·m^(1/2),*** work has solved the problems of uneven distribution of ultra-high temperature phases in the ceramic matrix,which is beneficial to the real applications of SiBCN ceramics.

关键词： Ta_(4)HfC_(5) SiBCN microstructure evolution mechanical properties

来源：评论

学校读者我要写书评

暂无评论

High Sensitivity Mems Vibration Sensors Based on Linbo3 Single-Crystal Films with Forked Finger Electrodes

SSRN

引用

SSRN 2023年

作者： Zhang, Huiyi Qiao, Xiaojun Wei, Huifen Fu, Wenxiao Bi, Kaixi Hou, Xiaojuan Mu, Jiliang He, Jian Chou, Xiujian Geng, Wenping Science and Technology on Electronic Test and Measurement Laboratory North University of China Taiyuan030051 China Shanxi Provincial Key Laboratory of Advanced Manufacturing Technology North University of China Taiyuan030051 China The School of Mechanical Engineering North University of China Taiyuan030051 China

Piezoelectric vibration accelerometers with higher sensitivity and wider working range are extremely desirable regarding vibration monitoring. Limited by the inherent frequency of sensors and environmental protection, conventional piezoelectric sensors are unable to detect vibration signals in wide frequency and high acceleration environments .Herein, LiNbO3-based single-crystal film piezoelectric vibration sensors based on cantilever beams structure are proposed with enhanced operating bandwidth and high sensitivity. The fork-finger electrodes collection method effectively improves the output charges efficiency. Vibration experiments are conducted at high acceleration environment over wide frequency from 20 to 2400 Hz where the charge sensitivity of sensors can reach 11.024 pC/g. The repeatability error of sensors is maintained within 3.4% for multiple measurements. The results show that cantilever beams model based on fork-finger electrodes provides a new structural design and charges collection method for highly sensitive and eco-friendly piezoelectric vibration devices operating in complex vibration environments. © 2023, The Authors. All rights reserved.

关键词： Niobium compounds

来源：评论

学校读者我要写书评

暂无评论

IR Net: information restriction and information recovery for accurate binary neural networks

引用

Neural Computing and Applications 2023年第19期35卷 14449-14464页

作者： Xue, Ping Lu, Yang Chang, Jingfei Wei, Xing Wei, Zhen School of Computer Science and Information Engineering Hefei University of Technology Hefei China Anhui Mine IOT and Security Monitoring Technology Key Laboratory Hefei China Engineering Research Center of Safety Critical Industrial Measurement and Control Technology Ministry of Education Hefei University of Technology Hefei China Intelligent Manufacturing Institute of Hefei University of Technology Hefei China

Weight and activation binarization can efficiently compress deep neural networks and accelerate model inference, but they cause severe accuracy degradation. Existing optimization methods for binary neural networks (BNNs) focus on fitting full-precision networks to reduce quantization errors and suffer from a tradeoff between accuracy and efficiency. In contrast, considering information loss and the mismatch between model capacity and input information quantity caused by network binarization, we propose Information Restriction and Information Recovery Network (IR $$^2$$ Net) to stimulate the potential of BNNs and achieve improved network accuracy by restricting the input information and recovering feature information. The proposed approach includes (1) information restriction, which evaluates the feature information extracted from the input by a BNN, discards some of the information it cannot focus on, and reduces the amount of the input information to match the model capacity; and (2) information recovery: due to the information loss incurred during forward propagation, the extracted feature information of the network is not sufficient for supporting accurate classification. Shallow feature maps with richer information are selected, and these feature maps are fused with the final feature maps to recover the extracted feature information and further enhance the model capacity to match the amount of input information. In addition, the computational cost is reduced by streamlining the information recovery method to strike a better tradeoff between accuracy and efficiency. Experimental results demonstrate that our approach still achieves comparable accuracy even with a $$\sim$$ 10x floating-point operations (FLOPs) reduction for ResNet-18. The models and code are available at https://***/pingxue-hfut/IR2Net .

关键词：

来源：评论

学校读者我要写书评

暂无评论

Lorentz inertial stability platform control based on KF-LESO-PID

引用

Beijing Hangkong Hangtian Daxue Xuebao/Journal of Beijing University of Aeronautics and Astronautics 2022年第6期48卷 1072-1081页

作者： Xiong, Ying Liu, Qiang Ren, Yuan Fan, Yahong Sun, Jinji Institute of Precision Electromagnetic Equipment and Advanced Measurement Technology Beijing Institute of Petrochemical Technology Beijing102617 China Department of Areospace Science and Technology Space Engineering University Beijing101416 China Science and Technology on Space Intelligent Control Laboratory Beijing Institute of Control Engineering Beijing100190 China Key Laboratory of Inertial Technology Beihang University Beijing100083 China

To overcome the disadvantages of the existing inertial stabilization platform such as large interference for using mechanical bearings, high difficulty for using air/liquid bearings and poor linearity for using magnetic resistance magnetic bearings, a new Lorentz inertial stability platform (LISP) based on Lorentz force deflection magnetic bearing is proposed. To suppress the influence of coupling effect and load-bearing friction resonance interference on the high-frequency attitude compensation control of the platform deflection channel, a digital control scheme based on LESO-PID combined with Kalman filter (KF) feedback is proposed. According to the structural characteristics of rotor tilt supported by Lorentz force magnetic bearing (LFMB), a dynamics model for LISP deflection is established;the tilting relationship of two radial channels is analyzed with the established model, and the linear extended state observer (LESO) and Kalman filter feedback control is introduced into PID controller to suppress friction resonance interference and coupling effects;a digital control system based on DSP and FPGA is construed, and the control method is digitalized in a discrete form. The stability of the proposed control method is analyzed by logarithmic frequency characteristic criterion and Nichols curve, and the stabilities of the rotor deflection channel before and after importing LESO-Kalman are compared through simulation. Experimental results show that with traditional PID, the rotor system causes serious distortion at high frequency, while the system reduces noise and interference greatly after importing LESO-Kalman control. Meanwhile, the internal state parameters of the system can be monitored in real time. Experimental results verify the effectiveness of proposed control method to suppress the frictional resonance interference and coupling effects. © 2022, Editorial Board of JBUAA. All right reserved.

关键词： Friction

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：