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2014 International conference on Vehicle,Mechanical and Electrical Engineering(ICVMEE 2014)

作者： Zhaoyan Zhang Xingwu Wang Yongguang Ma Department of Automation North China Electric Power University

Firstly,according to the topology of conventional chopper cascade speed system to analyze the transient process of main loop during of contactor operation when device *** the contactor action requires a longer time,Equipment is vulnerable to the impact of high voltage,high current during the contactor action,and cause damage to power electronic *** contactors drawbacks,the main circuit topology with electronic-protection circuit is *** analyze transient process of chopper cascade speed control system with electronic-protection circuit under high-voltage power failure ***,simulation model of chopper cascade speed control system with electronic-protection circuit is built respectively in *** results show that electronic-protection circuits effectively solve the problem of high-voltage power failure under active inverter structure and inverter subversion.

关键词： Electronic-protection circuit high-voltage power failure active inverter inverter subversion

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Investigation on Laser Cladding Mechanism and Cladding process of Iron Base Materials

Investigation on Laser Cladding Mechanism and Cladding Proce...

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2018 3rd International conference on control, automation and Artificial Intelligence (CAAI 2018)

作者： Haibing Xiao Mingjun Liu Wei Zhang Intelligent manufacturing & equipment School Shenzhen Institute of Information Technology

In this paper, in view of laser cladding of the iron base materials, new method for laser cladding of iron-base materials were proposed. Firstly, heat transfer mechanism of the laser cladding process and metal solidification theory was studied. Second, by laser cladding test bench, laser cladding experiments process test is described, experimental researches show that 45 steel substrate cladding layer is good, laser cladding process of iron base materials can quickly obtain high density and good surface quality cladding layer.

关键词： laser cladding heat transfer mechanism iron base materials laser cladding process

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LEECAU-Net: A Latent Entropy-Quantized and Efficient Channel Attention-Aided U-Net Model for Microscopic Medical Image Segmentation

LEECAU-Net: A Latent Entropy-Quantized and Efficient Channel...

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Symposium of Image, Signal processing, and Artificial Vision (STSIVA)

作者： Sanchita Das Gouranga Maity Diptarka Mandal Dmitrii Kaplun Alexander Voznesensky Ram Sarkar Dept. of CSE Jadavpur University Kolkata India Department of Applied Mathematics Defence Instituite of Advanced Technology Pune India Artificial Intelligence Research Institute China University of Mining and Technology Xuzhou China Dept. of Automation and Control Process St. Petersburg Electrotechnical University “LETI” St. Petersburg Russian Federation

ISBN: (数字)9798350363203

ISBN: (纸本)9798350363210

Microscopic medical image segmentation is essential for detailed cellular-level analysis in computational pathology, offering insights into disease mechanisms. However, this task is particularly challenging due to the high similarity between different cellular classes and variability within each class, especially in densely packed or overlapping cell regions. To this end, we present LEECAU-Net (Latent Entropy-quantized and Efficient Channel Attention-aided U-Net), a U-Net-based model designed to improve segmentation accuracy through a dual-attention mechanism. Built on an Inceptionv4 backbone, LEECAU-Net's encoder integrates Latent Entropy-quantized Channel Attention (LECA) and Efficient Channel Attention (ECA) modules. The ECA module enhances the network's ability to focus on essential channel dependencies, while LECA leverages entropy quantification to prioritize channels rich in information, leading to better differentiation between similar structures. We have tested LEECAU-Net on three challenging publicly available datasets: Triple Negative Breast Cancer (TNBC), Multi-organ Nuclei Segmentation (MoNuSeg), and Cervical Nucleus Segmentation (CNS). Across these datasets, our model achieves higher performance metrics than numerous state-of-the-art approaches reported in the literature. The improved results underscore the effectiveness of LEECAU-Net's architecture in handling the complexity of microscopic medical images, making it a valuable tool for advancing automated cellular analysis in biomedical research. The source code and more results are made available at https://***/Cmatermedicalimageanalysis/LEECAU-Net.

关键词： Image segmentation Accuracy Microscopy Computational modeling Biological system modeling Source coding Computer architecture Entropy Robustness Medical diagnostic imaging

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Management of Alarm System for process Industries

Management of Alarm System for Process Industries

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Society of Instrument and control Engineers Annual conference

作者： Tsutomu Takai Yasuhiro Kutsuma Hiroshi Ishihara Marketing Department Advanced Automation Company

Alarm management efforts have recently intensified. There are regulations and standard behind the trend and many incidents in chemical plants triggered their establishment. The present efforts involve comprehensive management regarding alarm systems based on potential risk analysis of a plant, and work on all phases of the plant such as alarm system design, operation procedure making, performance measurement, maintenance and training in the life cycle of a plant. This paper introduces the need and overview of alarm management with a guideline EEMUA191 and a US standard ANSI/ISA18.2-2009, and the recent trend of IEC for setting an international standard.

关键词： Alarm Management Abnormal Condition Human factor International Standardization

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Time Delay Compensation for a Class of Dual Loop Networked control System with Different Sampling Rate

Time Delay Compensation for a Class of Dual Loop Networked C...

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2018 3rd International conference on control, automation and Artificial Intelligence (CAAI 2018)

作者： Hong Zhao Ke Che Shenglan Zhang Mechanical and control engineering college Guilin University of Technology

This paper investigates a class of dual loop networked control system with different sampling rate. Smith predictor is used to eliminate the influence of time delay. However, uncertain time-varying delay and different sampling rate in the actual production process make the system with conventional Smith predictor cannot achieve the desired control effect. A modified Smith predictor with regulator is proposed for this kind of networked control system, which can be used to overcome the problems caused by random network delay and various sampling rate. The simulation results based on MATLAB/Simulink show that the proposed model and method are efficient and feasible.

关键词： different sampling rate dual loop networked control system Smith predictor time-varying delay

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Low-Speed Salient-Pole BLDC-Machine control by Using a Single Sensor

Low-Speed Salient-Pole BLDC-Machine Control by Using a Singl...

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International conference on Electrical Machines and Systems

作者： Frederik De Belie Jeroen De Backer Araz Darba Jan Melkebeek Dept. Electrical Energy Systems & Automation Ghent University

ISBN: (纸本)9781467323277

This paper discusses an enhancement for salient-pole brushless dc-drives using a single current sensor in the dc-bus. The improvement is made by replacing the hall sensors with a rotor-position estimator, increasing the reliability of the drive and reducing its cost. As a result, the BLDC-drive is controlled by using a single sensor only, requiring a minimum amount of electronics to process the measurements. The additional advantage of a position estimator in BLDC-drives is the high resolution in the rotor position information. This allows to use advanced model-based controllers (e.g. programmed current control) and to extend the range of operation (e.g. higher speed by field weakening).

关键词： field weakening MACHINE TOOL control operating range Sensors low speed POSITION INFORMATION Electronics Automobile driving DRIVES High definition unidirectional current Hall effect transducers rotor position brushless Current control

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Development of intelligent setting system for fracture based on x-ray image

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Journal of Physics: conference Series 2006年第1期48卷 1137-1141页

作者： Zheng, W. Zhang, Y. Liu, J. Yu, G. Hebei University College of Electronic and Information Engineering Baoding 071002 China Harbin University of Science and Technology Measurement Control Technology and Communications Engineering College Harbin 150040 China Harbin Institute of Technology School of Electrical Engineering and Automation Harbin 150001 China Harbin Fifth Hospital Department of Orthopedics Harbin 150040 China

In order to achieve micro-wound, intelligence and high efficiency for fracture setting, intelligent setting system for fracture is proposed in accordance with biomechanics and fracture therapy theory. In the comprehensive medical system based on C-shape-arm X-machine, image processing and analysis is the core, programmable logical controller and stepping motor are important driving parts controlling mechanical parts. Six degree of freedom dynamics sensor ensures to control accurately force and moment. On the foundation of analyzing X-ray image peculiarities, method of processing and analysis is put forward, combining time domain with frequency domain. After mining domain knowledge in depth, setting actions is quantized into three non-continuous steps and is parameterized into two angles and one distance aiming at femoral-neck fracture. Objective features are extracted by virtue of three power polymerization curved surface fitting. Master-slave reference frame is advanced to solve a question that basic standard for parameters calculation is difficult to be determined. At the same time, four-groupsixteen-frame algorithm is put forward to solve a problem that the load value is unable to be calculated and applied precisely in the process of treatment of delayed union and non-union of fracture. Clinic experience proved that the system can help orthopedist to correctly and reliably complete fracture setting. And the system has many advantages such as micro-wound, low medical cost and low infection ratio, in comparison with traditional operation setting and manipulator setting. © 2006 IOP Publishing Ltd.

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A PLAYBACK SYSTEM FOR FLIGHT SURVEILLANCE INFORMATION

A PLAYBACK SYSTEM FOR FLIGHT SURVEILLANCE INFORMATION

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Integrated Communications, Navigation and Surveillance conference

作者： Jun Yang Wanwei Wang Hui Xu Zhe Zhang Ping Han Tianjin Key Lab for Advanced Signal Processing Civil Aviation University of China Tianjin China Dalian Air Traffic Management Station of Civil Aviation Administration of China Dalian China

The playback of flights' surveillance information plays an import role when flights encounter special circumstances, such as accidents. It can help analyze when, where and why the special circumstances happened intuitively. Different from traditional air traffic control automation system, we propose a playback system based on double-buffers method. A playing buffer and a fetching buffer is created, one is for storing the surveillance information that will be play back and the other one is used for storing the surveillance information fetched from the database. Thus, data fetching and data playback can be done concurrently, to play back the flights' surveillance information continuously. What's more a reliable UDP is proposed to improve the reliability of the data communication of the playback system.

关键词： Surveillance Reliability Relational databases Buffer storage Data processing process control

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Development of a neural network for advanced control of a fuel oil vacuum distillation in petroleum refining

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AIP conference Proceedings 2022年第1期2467卷

作者： E. A. Muravyova M. I. Sharipov Ufa State Petroleum Technological University Branch in Sterlitamak Sterlitamak Russia

Almost every industrial process in the world is automatically controlled. The accumulated data on the state of the technological process, data on the actions of the supervisory staff, the characteristics of the raw materials can and should be used to improve the control of the technological process and the technical and economic indicators of production. The solution to these issues is possible when using a neural networks that allow to quickly respond to changes of the quality of raw materials and product flows. The purpose of this research is development a neural network for advanced control of vacuum distillation of fuel oil. To achieve this purpose a functional diagram of the vacuum distillation of fuel oil process of automation and SCADA-systems data are used. Thus the system for automatic control of the vacuum distillation of fuel oil has been developed.

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Analysis and Optimization of Stamping B-pillar of High Strength Steel DH780

Analysis and Optimization of Stamping B-pillar of High Stren...

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2018 3rd International conference on control, automation and Artificial Intelligence (CAAI 2018)

作者： Wenyu Ma Jianwei Yang Jun Zhang Xuebin Zheng Baochuan Wang Research Institute of Technology of Shougang Group Co. Ltd. Beijing Key Laboratory of Green Recycling Process for Iron & Steel Production Technology Beijing Engineering Research Center of Energy Steel

In this study, the high strength steel DH780 produced by Shougang Group was used to form a traditional part B-pillar. The effect of process parameters, namely blank holder force and friction coefficient on the formability was analyzed. The decrease of BHF and friction coefficient can increase the formability. And the optimization methods were introduced and applied to form a qualified part. Three optimization methods were employed, namely optimizing the critical surface of die, modifying the geometric parameter of drawbead, and changing the corner size near the critical area. The qualified part can be formed with the proper optimization.

关键词： high strength steel B-pillar blank holder force optimization

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