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17th IEEE International Conference on Emerging eLearning Technologies and Applications, ICETA 2019

作者： Chivarov, Nayden Chikurtev, Denis Pleva, Matus Ondas, Stanislav Juhar, Jozef Liao, Yuan-Fu Institute of Information and Communication Technologies Bulgarian Academy of Sciences BAS Acad. G. Bonchev St. Sofia1113 Bulgaria Robotics Lab European Polytechnical University 23 Sv. Sv. Kiril i Metodiy Str. Pernik2300 Bulgaria Department of Electronics and Multimedia Communications Faculty of Electrical Engineering and Informatics Technical University of Kosice Letna 9 Kosice04200 Slovakia Department of Electronic Engineering College of Electrical Engineering &computer Science National Taipei University of Technology Zhongxiao E. Rd. 406 Taipei10608 Taiwan

ISBN: (纸本)9781728149677

This paper describes a new platform of educational mobile robot with Mecanum wheels and voice enabled dialogue-based human robot interaction model was established. Moreover, new trends in using deep neural networks for cloud-and edge-based speech recognition was described in detail. Finally, the progress of both the cloudand edge-based speech recognition was reported. Especially, promising usability test result on resisting room reverberation and background noise had been achieved by the proposed convolutional neural network (CNN)-based wake-up word (WUW) spotting system. © 2019 IEEE.

关键词： Mobile robots

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Wear Mechanisms Characterization Operating in Micro- and Nanoscale of the a-C:H Coating Implanted by Ag-Pt

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Biotribology 2018年 13卷 16-22页

作者： Janusz, M. Major, L. Kot, M. Dyner, M. Lackner, J.M. Major, B. Institute of Metallurgy and Materials Science Polish Academy of Sciences 25 Reymonta Street Cracow 30-059 Poland Laboratory of Surface Engineering and Tribology Faculty of Mechanical Engineering and Robotics AGH University of Science and Technology Cracow Poland CHIRMED-Manufacturer of Surgical and Medical Instruments 8a Mstowska Street 42-240 Rudniki Poland JOANNEUM RESEARCH –Materials Institute for Surface Technologies and Photonics Niklasdorf Austria

Wear mechanisms operating at the nanoscale may directly influence mechanical and biological properties of the advanced protective coatings used in industry. In the present research, the biomechanical properties of the advanced a-C:H coatings reinforced by different metallic crystallites have been characterized. The optimal biomechanical properties were found for the a-C:H implanted by Ag–Pt crystallites. This coating has been selected for the detailed wear mechanism description at the nanoscale by transmission electron microscopy. Five zones of the coating deformation as a function of the distance from the centre of the maximum load during the wear process have been identified and described. Based on the bio-tribological properties, a-C:H coatings implanted by Ag–Pt are the most promising for use in applications. © 2017 Elsevier Ltd

关键词： Bio- mechanical properties Composite coatings TEM microstructure characterization Wear mechanisms

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Review of Algorithms for Tag Detection in Video Sequences

Review of Algorithms for Tag Detection in Video Sequences

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IEEE International Conference on Intelligent Engineering Systems (INES)

作者： Ryszard Klempous Konrad Kluwak Jan Nikodem Marek Kulbacki Jakub Segen Wojciech Knieć Andrea Serester Faculty of Electronics Wroclaw University of Science and Technology Wroclaw Poland DIVE IN AI Wroclaw Poland Antal Bejczy Center for Intelligent Robotics Óbuda University

Detecting moving objects in video sequences may be particularly challenging because of the characteristics of the objects, such as their size, colour, contrast, velocity and trajectory. Industrial video tagging systems should generate tags based on information inferred from video frames and learn relations between given concepts. In opposite to traditional methods such systems should effectively segment semantic objects in tagged videos, even when the image-based object detectors provide inaccurate proposals. Such systems usually base on the knowledge which is constantly updated to acquire the dynamics of the indexed concepts. In this paper we present a short review of the most importants algorithms for detection of markers in video sequences and problems related with practical applications.

关键词： Hidden Markov models Video sequences Visualization Motion segmentation Benchmark testing Emotion recognition Sensors

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Trajectory planning and control for drone replacement for multidrone cinematography

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IFAC-PapersOnLine 2019年第12期52卷 334-339页

作者： Marta Marques Bruno J. Guerreiro Rita Cunha Carlos Silvestre Institute for Systems and Robotics (ISR-Lisbon) LARSYS Instituto Superior Tecnico 1049-001 Lisbon Portugal Dep. of Electrical and Computer Eng. and CTS-Uninova Universidade Nova de Lisboa Caparica 2829-516 Portugal Dep. of Electrical and Computer Eng. Faculty of Science and Technology University of Macau China and also on leave from Instituto Superior Tecnico Universidade de Lisboa Lisbon Portugal

This work addresses the problem of trajectory planning and control for a team of drones, so that a vehicle that is following a target as part of a multi-vehicle formation flight can be safely replaced with minimum impact on the formation objectives. An optimal trajectory generation method is presented, which relies on formulating a nonlinear optimization problem with constraints imposed by the physical limitations of the vehicle, the formation, and the surrounding environment, including nonlinear constraints to enforce inter-vehicle collision avoidance and clear visibility of the target. An online planning and control strategy is also implemented through a Nonlinear Model Predictive Control problem, based on the dynamic model of the system, a quadratic objective function, and a set of constraints, that again include collision avoidance and clear visibility. The proposed algorithms are validated in software-in-the-loop simulations that include the autopilot software.

关键词： UAV dynamics control guidance navigation Formation flying

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Training medical image analysis systems like radiologists

arXiv

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arXiv 2018年

作者： Maicas, Gabriel Bradley, Andrew P. Nascimento, Jacinto C. Reid, Ian Carneiro, Gustavo Australian Institute for Machine Learning University of Adelaide Science and Engineering Faculty Queensland University of Technology Institute for Systems and Robotics Instituto Superior Tecnico Portugal

The training of medical image analysis systems using machine learning approaches follows a common script: Collect and annotate a large dataset, train the classifier on the training set, and test it on a hold-out test set. This process bears no direct resemblance with radiologist training, which is based on solving a series of tasks of increasing difficulty, where each task involves the use of significantly smaller datasets than those used in machine learning. In this paper, we propose a novel training approach inspired by how radiologists are trained. In particular, we explore the use of meta-training that models a classifier based on a series of tasks. Tasks are selected using teacher-student curriculum learning, where each task consists of simple classification problems containing small training sets. We hypothesize that our proposed meta-training approach can be used to pre-train medical image analysis models. This hypothesis is tested on the automatic breast screening classification from DCE-MRI trained with weakly labeled datasets. The classification performance achieved by our approach is shown to be the best in the field for that application, compared to state of art baseline approaches: DenseNet,-multiple instance learning and multi-task learning. Copyright © 2018, The Authors. All rights reserved.

关键词： Magnetic resonance imaging

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Study on vibratory crushing and granulation of limestone 17

Study on vibratory crushing and granulation of limestone

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17th International Multidisciplinary Scientific Geoconference, SGEM 2017

作者： Feliks, Jacek Mazur, Marcin AGH University of Science and Technology Faculty of Mechanical Engineering and Robotics Department of Mining Dressing and Transport Machines Poland

ISBN: (纸本)9786197408263

The article presents results of using vibratory jaw crusher for feed preparing for the granulation process. The main aim of the study was to determine the possibility of preparing the limestone feed for non-pressurized granulation process by means of very fine crushing in the laboratory vibratory jaw crusher KW 40/1 with kinematic actuation of jaws. The crusher is characterized by high average degree of fragmentation (30-50). The study was conducted in two stages. The first stage included experiments with vibratory crushing process and the second stage covered examination of non pressurized granulation process. To determine the effect of particle size of crushed limestone on the granulation process it was decided to conduct a study on granulation with two variants of the feed with different particle size distribution. Feed produced for granulation process contained grain class 0-200 microns in the range of 48.4% to 73.0%. This means that vibratory jaw crushers, which have lower energy consumption than any known mill, can be used for production of granulated mineral fertilizers. © SGEM2017. All Rights Reserved.

关键词： Fertilizers

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Safety systems against metallic contaminations in feed material 17

Safety systems against metallic contaminations in feed mater...

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17th International Multidisciplinary Scientific Geoconference, SGEM 2017

作者： Feliks, Jacek Mazur, Marcin AGH University of Science and Technology Faculty of Mechanical Engineering and Robotics Department of Mining Dressing and Transport Machines Poland

ISBN: (纸本)9786197408263

The basic purpose of magnetic separation is to separate the ferromagnetic elements from the magnetically inert component. In difficult conditions of mining activity, due to high costs of repair or replacement of damaged machine elements, prevention related to the correct operation of machinery and equipment of production lines is particularly important. Safety systems of feed material (electromagnetic separators) are designed for installation on construction of a conveyor belt to clean the transported material from ferrous metallic contaminations. Systems described in the article protect crushing and other accompanying machines against permanent damage or emergency stops caused by an unwanted piece of etal, at the same time recovering ferrous scrap material. In most mining applications drum and over-belt separators are most commonly used. This paper presents the classification and design solutions of currently used mining electromagnetic separators as well as examples of their application. © SGEM2017. All Rights Reserved.

关键词： Separators

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Hard rock mining – cutting or disk tools

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IOP Conference Series: Materials science and Engineering 2019年第1期545卷

作者： K Kotwica AGH University of Science and Technology Faculty of Mechanical Engineering and Robotics Al. Mickiewicza 30 30-059 Cracow Poland

The article presents problems related to the mining of compact and very hard rocks with cutting tools, mainly with tangential-rotary picks. The currently used disc tools, their parameters and the way of working are described. The disadvantages of selected solutions and related obstacles to their wider use in mining have been presented. The directions of further development of disk tools were presented, allowing their use, for example, in mining heads of longwall shearers and roadheaders.

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Usage of fractal geometry to describe particle size distribution of grainy and non-grainy suspensions 17

Usage of fractal geometry to describe particle size distribu...

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17th International Multidisciplinary Scientific Geoconference, SGEM 2017

作者： Banas, Marian Hilger, Bartlomiej AGH University of Science and Technology Faculty of Mechanical Engineering and Robotics Department of Power Systems and Environmental Protection Poland

ISBN: (纸本)9786197408263

Fractal geometry in recent years became an useful tool used in many scientific fields. One of the directions of development of that tool was also an attempt as using it for describing the morphology and granulometry of solid phase contained in various suspensions. The solid phase can come from different sources, such as municipal process (e.g. water treatment) or industrial process (e.g. metallurgy/steel industry or mineral processing). Suspensions on which one can come across in industry tend to be grainy and the process of solid phase separation of that kind of suspensions is relatively well described. Different situation is represented by non-grainy suspensions whose sedimentation process is not well modelled with current models used for grainy suspensions. By using fractal geometry, specific properties of solid particles, such as shape, porosity and permeability of non-grainy conglomerates can be taken into consideration, thus fractal geometry could link the two radically different suspensions and ensure one mathematical model suitable for both. The aim of this work is to present differences between descriptions of grainy suspensions and non-grainy suspensions. © SGEM2017 All Rights Reserved.

关键词： Suspensions (fluids)

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Possible applications of vibratory technology in crushing technological lines 17

Possible applications of vibratory technology in crushing te...

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17th International Multidisciplinary Scientific Geoconference, SGEM 2017

作者： Mazur, Marcin AGH University of Science and Technology Faculty of Mechanical Engineering and Robotics Department of Mining Dressing and Transport Machines Poland

ISBN: (纸本)9786197408263

Very fine crushing of hard and very hard materials, to product of particle size less than 2-4 mm at feed particle size of 50-200 mm, requires a very large energy inputs. This is mainly because of the need for at least three or even four degrees of crushing, containing: jaw, cone or impact crushers. One of the methods of reducing the amount of energy expended on the crushing process is reducing the number of crushers in technological line. By replacing a large number of less effective crushers with fewer machines but characterized by higher crushing efficiency we can gain considerable savings in investment and operating costs. This is possible by using crushers capable of obtaining much greater degrees of fragmentation than the aforementioned, that is vibratory crushers. The paper includes the systematic of currently used vibratory crushers, their mechanical diagrams, descriptions of the construction and operation, and basic technical parameters as well as examples of crushing technological lines utilizing vibratory crushers. © SGEM2017. All Rights Reserved.

关键词： Crushers

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