检索结果-内蒙古大学图书馆

2021 6th International Conference on Applied Mechanics and Structural Materials, AMSM 2021

作者： Liu, Yongning Qiao, Zhifeng Liu, Qingjian Huang, Jiahao Fu, Kang Tianjin Key Laboratory for Advanced Mechatronic System Design and Intelligent Control School of Mechanical Engineering Tianjin University of Technology Tianjin300384 China China

The demand for lightweight vehicles that achieve energy conservation and emission reduction continues to grow. Aluminum alloys were commonly applied to the automotive industry to reduce the structural quality of the entire vehicle. However, the cost of aluminum alloy was higher than that of steel, so the industry considered the use of aluminum in combination with low-cost materials such as steel. Traditional welding technology was limited by the great physical difference between aluminum alloy and steel. Friction Stir Welding, a solid phase welding technology, can overcome the connection problem of aluminum and its alloys with steel, but the process parameters of FSW directly affect the welding quality. This paper established the FSW process of two different metals of DC05 and AL6061. Aimed to get a good welding joint, the error of tool speed is reduced by fuzzy PID system established in this paper, and the tool speed is controlled stably. Simulink simulation was established, and compared with the simulation results, fuzzy PID control can control the precision and stability of the tool speed of FSW, improve the welding quality, and provide a certain theoretical basis for the tool speed control. © 2022 Institute of Physics Publishing. All rights reserved.

关键词： Friction stir welding

来源：评论

学校读者我要写书评

暂无评论

A semantic segmentation method based on improved u-net network 4

A semantic segmentation method based on improved u-net netwo...

引用

4th International Conference on advanced Electronic Materials, Computers and Software Engineering, AEMCSE 2021

作者： Li, Penghui Zhang, Lijun Qiao, Jinlong Wang, Xiangguo China University of Geosciences School of Automation Wuhan430074 China Hubei Key Laboratory of Advanced Control and Intelligent Automation for Complex System Wuhan China

ISBN: (纸本)9781665415965

Semantic segmentation is the most important branch of image processing. Semantic segmentation based on deep learning occupies the mainstream method. CNN, FCN, U-NET and DEEPLAB series have achieved good results in the field of image semantic segmentation. The improvement methods of each network also emerge in an endless stream, but the emphasis of improving the network focuses on the feature transfer and feature fusion between network layers in each method. In this paper, based on u-net, we use deep convolution, residual autonomic force and dendrite network to improve the network model. Deep convolution can reduce the amount of calculation, deepen the depth of network, extract more abundant image information, and transmit information between network layers in a more refined way. Dendritic networks are different from ordinary neural networks. Ordinary neural networks process information as models of nerve cell bodies. The role of neural dendrites is also important in the process of information processing. Dendritic network is used as a model of neural dendrites to improve the ability of information processing. The improved network in this paper was tested on the VOC2012 dataset, and the experimental results showed that PA, mAP and IoU were 93.36%, 92.28% and 68.26% respectively. The experimental results showed that the improved network in this paper had improved in all indicators. © 2021 IEEE.

关键词： Semantic Segmentation

来源：评论

学校读者我要写书评

暂无评论

Two methods of determining target orientation by robot visual principle

Two methods of determining target orientation by robot visua...

引用

作者： Liu, Gang School of Mechanical Engineering Tianjin University of Technology Tianjin Key Laboratory of Advanced Mechanical and Electrical System Design and Intelligent Control Tianjin300384 China

ISBN: (纸本)9781538636749

By analyzing the imaging principle of the fish-eye lens in the robot vision, two methods of determination of the target orientation based on the fish-eye lens are summarized. One method uses the distortion correction to determine the target orientation, and the other uses the relationship between the target in the actual orientation and its correspondence in the imaging coordinates to determine the target orientation, both methods all use image processing technology, fast and efficiently determine the orientation of the target in the fish eye image. In this paper, the theoretical basis and experimental process of the two methods are introduced respectively. By comparing the data after the experiment, the more accurate method is analyzed and applied to the target azimuth determination of the fish-eye lens. © 2017 IEEE.

关键词： Fish-eye lens Image processing Robot vision Target orientation

来源：评论

学校读者我要写书评

暂无评论

Whispering Gallery Mode Resonances of Perovskite Nanoplatelets

Whispering Gallery Mode Resonances of Perovskite Nanoplatele...

引用

第四届新型太阳能电池学术研讨会

作者： Guohui Li Weimin Kong Qiangbing Liang Xingqi Ji Ting Ji Yuying Hao Yanxia Cui Key Laboratory of Advanced Transducers and Intelligent Control System (Ministry of Education) College of Physics and Optoelectronics Taiyuan University of Technology

Organic-inorganic hybridized perovskites have attracted more and more attention due to their advantages such as high absorption coefficients, direct band-gap, long carrier lifetimes, balanced electron/hole mobility, ***-scaled perovskites, which possess naturally-formed optical feedback, can excite resonance under certain incident light and realize the precise light management as *** 2014, Ha et *** lead halide perovskite nanoplatelets with regular triangular or hexagonal morphologies by vapor phase deposition techniques on mica plate [1].Later, they realized lasing based on the whispering-gallery modes at the near-infrared range using the prepared perovskite nanoplatelets [2].Here, we first synthesized lead iodide nanoplatelets with well-defined crystal boundaries and then successfully conversed the pre-grown lead iodide template into perovskite nanoplatelets by placing the substrate exactly above the methyl iodide amine powder in Ar gas condition with all valves of the quartz tube *** a continuous-wave laser at 325 nm, we measured the photoluminescence spectra of different perovskite nanoplatelets and observed the whispering gallery modes over the spontaneous emission band.

关键词： Perovskite Whispering gallery mode Nanoplatelet Vapor phase Resonance

来源：评论

学校读者我要写书评

暂无评论

Ultra-wideband terahertz absorber based on graphene modulation

引用

Applied Optics 2021年第11期60卷 3170-3175页

作者： Li, Xiaogang Feng, Guang Lin, Suben Co. Ltd. Ocean Science and Technology Innovation Park No. 19 Binhai 3rd Road Wenzhou325024 China Key Lab of Advanced Transducers and Intelligent Control System Ministry of Education and Shanxi Province College of Physics and Optoelectronics Taiyuan University of Technology Taiyuan030024 China

Here we propose an ultra-wideband terahertz absorber (UWTA), which is composed of substrate, dielectric, and five-layer graphenes. By changing the chemical potential of graphene, the absorption coefficient ofUWTA is larger than 0.9 from 1.51-8.25 THz. The absorption bandwidth is 6.74 THz. The relative bandwidth is 138.1%, and the modulation depth is 78.7%.Meanwhile, the number of each layer of graphene can be adjusted to achieve high absorption bandwidth, relative bandwidth, and modulation depth. Besides, due to the tunable chemical potential of graphene, the absorption coefficient can be adjusted to make up the manufacturing error. © 2021 Optical Society of America.

关键词： Chemical potential

来源：评论

学校读者我要写书评

暂无评论

Synchronization of fractional-order gene regulatory network with delay 36

Synchronization of fractional-order gene regulatory network ...

引用

第36届中国控制会议

作者： Feng Liu Zhe Zhang Ren Jie Sun Fenglan School of Automation China University of Geosciences Hubei key Laboratory of Advanced Control and Intelligent Automation for Complex Systems Research Center of System Theory & Application Chongqing University of Posts and Telecommunications

ISBN: (纸本)9781538629185

This paper investigates the problem of Synchronous control of Fractional gene regulatory *** on the Lyapunov stability judgment method,we apply two kinds of control method,adaptive projection control and adaptive sliding mode control,for making system ***,a numerical simulation example is provided to verify the effectiveness and the benefit of the proposed synchronicity criterion.

关键词： Fractional-order synchronization adaptive projection control adaptive sliding mode control

来源：评论

学校读者我要写书评

暂无评论

The ice thickness sensor based on electric conduction characteristic of air, ice and water

The ice thickness sensor based on electric conduction charac...

引用

9th World Multi-Conference on systemics, Cybernetics and Informatics, WMSCI 2005

作者： Qin, Jianmin Han, Zhennan Dou, Yinke Cui, Huaibei Chi, Huanying Key Laboratory of Advanced Transducers and Intelligent Control Systems Ministry of Education Taiyuan University of Technology Taiyuan 030024 Shanxi China Shanxi Institute of Comprehensive Professional Technic Taiyuan 030006 Shanxi China

ISBN: (纸本)9806560612

It is a new testing technology that ice thickness is measured by making use of electric conductivity in water and in ice. The electric conductivity in water gradually decrease from strong to weak during the state of water changing from liquid into solid. Bases on this characteristics, a new sensor structure for measuring thickness of ice layer and its testing method are developed in the paper, and its application to hydrologic gauging is also briefly introduced.

关键词： Electric conductivity

来源：评论

学校读者我要写书评

暂无评论

SVR-PSO based short-term wind power prediction by using multi-source numerical weather prediection 8

SVR-PSO based short-term wind power prediction by using mult...

引用

8th International Symposium on Computational Intelligence and Industrial Applications and 12th China-Japan International Workshop on Information Technology and control Applications, ISCIIA and ITCA 2018

作者： Zhou, Hao Ding, Min Li, Danyun Wang, Qingyi Tan, Zhili Wu, Min School of Automation China University of Geosciences Wuhan430074 China Hubei Key Laboratory of Advanced Control and Intelligent Automation for Complex System Wuhan430074 China

With the large-scale application of wind power, the wind power prediction has been highlighted. In order to improve the prediction accuracy of wind power and ensure the resource utilization rate, a wind power prediction method based on support vector machine regression and particle swarm optimization based on multi-source NWP (numerical weather prediction) is proposed. Firstly, the SVR (support vector regression) algorithm is introduced to model the multi-source wind speed data, which can effectively extract the main features and improve the wind speed prediction accuracy. Then, the PSO (particle swarm optimization) is used to model the historical predicted power data and the actual power data for power prediction. Finally, the proposed approach provides wind power forecasts for future 1 day in steps of 15 min. The effectiveness of the proposed method is verified by experiments on wind farms and the results show that the proposed method is more accurate and effective than SVR. © ISCIIA and ITCA 2018 - 8th International Symposium on Computational Intelligence and Industrial Applications and 12th China-Japan International Workshop on Information Technology and control Application.

关键词： Weather forecasting

来源：评论

学校读者我要写书评

暂无评论

Design of fuzzy PID for electro-hydraulic servo control system based on FPGA

引用

Energy Education Science and Technology Part A: Energy Science and Research 2013年第3期31卷 1469-1474页

作者： Hao, Xiaoxing Wang, Xuping Taiyuan University of Technology Key Lab of Advanced Transducers and Intelligent Control System Ministry of Education Taiyuan 030024 China

This paper proposes the design of an electro-hydraulic servo control system based on FPGA and fuzzy PID. The system adopts FPGA as the basic control processer and fuzzy PID as the control algorithm. On the one hand, it takes the advantages of FPGA high processing speed and strong real-time, on the other hand, it possess powerful robustness of fuzzy control and good dynamic response. The results of experimental simulation and practical tests indicate that compared with the traditional servo controller, the control system has high operation speed and short servo cycle, the response time is about 0.5s, steady-state error is almost zero, the steady-state error is about 0.2mm, and the controlled variable output on steady state is smoothing. The system with good steady-state accuracy and dynamic performances characteristics can meet the requirements of high-speed and high-precision. Moreover, it is able to make many complex control algorithms realized in hardware and optimized the algorithms according to the result timely. © Sila Science.

关键词： Field programmable gate arrays (FPGA)

来源：评论

学校读者我要写书评

暂无评论

A threshold segmentation method for non-uniform illumination image based on brightness equalization 2

A threshold segmentation method for non-uniform illumination...

引用

2019 2nd International Conference on advanced Materials, intelligent Manufacturing and Automation, AMIMA 2019

作者： Guo, Hui Chen, Peng Huang, Shun Hu, Cong Zhang, Lijun School of Automation China University of Geosciences Wuhan430074 China Hubei Key Laboratory of Advanced Control and Intelligent Automation for Complex System Wuhan430074 China

In the process of image acquisition, non-uniform illumination images are common due to poor lighting, surface reflection, or a combination of these two factors. In order to improve the quality of image segmentation, an image threshold segmentation method is proposed for non-uniform illumination images. First, the brightness of different regions in the image is compensated to make the brightness background of the whole image consistent. Second, the gradation histogram of the processed image is obtained and simulated into Gaussian distribution curve, then the inflection points of the curve are calculated. Finally, the two inflection points are set as thresholds to segment the image after brightness equalization. This method eliminates the influence of non-uniform illumination to a certain extent and gets a better segmentation effect. Experiments were carried out on images containing several different types of non-uniform illumination. The results demonstrate that the proposed method outperforms the compared enhancement algorithms in threshold segmentation. © Published under licence by IOP Publishing Ltd.

关键词： Luminance

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：