检索结果-内蒙古大学图书馆

The communication system for power monitoring in the underground coal mine

Advances in Information Sciences and Service Sciences 2012年第21期4卷 459-467页

作者： Jin, Baoquan Wang, Yonghong Wang, Qinglin Key Lab of Advanced Transducers and Intelligent Control System Ministry of Education Taiyuan University of Technology Taiyuan China

Power monitoring system in the underground coal mine is used for real-time monitoring power supply equipment. The communication for power monitoring system plays an important role on ensuring information transmission of coal mine safety production. The monitoring of the coal mine power sub-station is designed, transfer information by free port communication based on RS485 communication, build communication protocol and ethernet communication hardware systems, establish the remote transmission communication between the underground and the ground for control of power system information transmission. Studies show that information transmission schedule reliably ensures the information transmission of the power monitoring system.

关键词： Monitoring

来源：评论

学校读者我要写书评

暂无评论

Ultrafast multi-target control of tightly focused light fields

引用

Opto-Electronic Advances 2022年第3期5卷 76-87页

作者： Yanxiang Zhang Xiaofei Liu Han Lin Dan Wang Ensi Cao Shaoding Liu Zhongquan Nie Baohua Jia Key Lab of Advanced Transducers and Intelligent Control System Ministry of Education and Shanxi ProvinceCollege of Physics and OptoelectronicsTaiyuan University of TechnologyTaiyuan 030024China Department of Physics Harbin Institute of TechnologyHarbin 150001China Centre of Translational Atomaterials(CTAM) Faculty of ScienceEngineering and TechnologySwinburne University of TechnologyHawthornVIC 3122Australia

The control of ultrafast optical field is of great interest in developing ultrafast optics as well as the investigation on vari-ous light-matter interactions with ultrashort ***,conventional spatial encoding approaches have only lim-ited steerable targets usually neglecting the temporal effect,thus hindering their broad *** we present a new concept for realizing ultrafast modulation of multi-target focal fields based on the facile combination of time-depend-ent vectorial diffraction theory with fast Fourier *** is achieved by focusing femtosecond pulsed light carrying vectorial-vortex by a single objective lens under tight focusing *** is uncovered that the ultrafast temporal de-gree of freedom within a configurable temporal duration(~400 fs)plays a pivotal role in determining the rich and exotic features of the focused optical field at one time,namely,bright-dark alternation,periodic rotation,and longitudinal/trans-verse polarization *** underlying control mechanisms have been *** being of academic in-terest in diverse ultrafast spectral regimes,these peculiar behaviors of the space-time evolutionary beams may underpin prolific ultrafast-related applications such as multifunctional integrated optical chip,high-efficiency laser trapping,micro-structure rotation,super-resolution optical microscopy,precise optical measurement,and liveness tracking.

关键词： ultrafast optical field vectorial diffraction theory fast Fourier transform vectorial vortex beam space-time shaping

来源：评论

学校读者我要写书评

暂无评论

Experimental investigation of a UWB direct chaotic through-wall imaging radar using colpitts oscillator

Experimental investigation of a UWB direct chaotic through-w...

引用

IET International Radar Conference 2015

作者： L. Liu R. X. Ma H. Xu W. K. Wang B. J. Wang J. X. Li Key Lab of Advanced Transducers and Intelligent Control System Ministry of Education and Shanxi Province

ISBN: (纸本)9781510822023

An ultra-wideband direct chaotic through-wall imaging radar is proposed and experimentally demonstrated. The chaotic signal is generated by an improved Colpitts oscillator. Target range information is achieved by the cross-correlation between the time-delayed reflected echo signal and the replica of the transmitted chaotic signal. Two-dimensional image is obtained by synthetic aperture technology and back projection algorithm. Experimental results of single target and double targets show that the proposed chaotic radar system can through 20cm thick wall to detect and locate the target.

关键词： Through-wall radar Chaotic radar UWB Colpitts oscillator Synthetic aperture

来源：评论

学校读者我要写书评

暂无评论

Study on Rotating Speed control of Dissimilar Metal Friction Stir Welding based on Fuzzy PID 6

Study on Rotating Speed Control of Dissimilar Metal Friction...

引用

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

Fuzzy PID control study based on electrohydraulic servo proportional valve position

引用

Energy Education Science and Technology Part A: Energy Science and Research 2013年第1期31卷 437-440页

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

Aiming at reasonable parameters approximation for the electro-hydraulic servo system, and parameters offset due to temperature changes caused, and as well as system inherent in the dead zone, hysteresis effect nonlinear factors, analysis of approximate dynamic mathematical model based on the position of the servo proportional valve control. On the basis of conventional PID, fuzzy PID control is proposed to be applied to the servo proportional valve controlled cylinder system. And joint simulation results showed that the Fuzzy PID control system based on servo proportional valve electro-hydraulic servo system, compared with the traditional PID control system has a fast response, short rise time, overshoot characteristics. This in theory of electro-hydraulic servo control system has certain reference significance. © Sila Science.

关键词： Simulink

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

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：