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Environmentally safe layered crystal produced from hazardous chemical elements: TlPb2BrI4, a new promising detector material

引用

Journal of Alloys and Compounds 2022年 924卷

作者： Khyzhun, O.Y. Vu, Tuan V. Parasyuk, O.V. Fedorchuk, A.O. Fochuk, P.M. Lavrentyev, A.A. Gabrelian, B.V. Levchuk, Ievgen Matt, Gebhard J. Tedde, Sandro F. Schmidt, Oliver Shrestha, Shreetu Brabec, Christoph J. Kityk, I.V. Piasecki, M. Frantsevych Institute for Problems of Materials Science National Academy of Sciences of Ukraine 3 Krzhyzhanovsky Street KyivUA-03142 Ukraine Faculty of Mechanical - Electrical and Computer Engineering School of Engineering and Technology Van Lang University Ho Chi Minh City Viet Nam Department of Inorganic and Physical Chemistry Lesya Ukrainka Volyn National University 13 Voli Avenue LutskUA-43025 Ukraine Department of Inorganic and Organic Chemistry Lviv National University of Veterinary Medicine and Biotechnologies 50 Pekarska Street Lviv79010 Ukraine Yuriy Fed'kovych Chernivtsi National University 2 Kotziubynskoho Street Chernivtsi58012 Ukraine Department of Electrical Engineering and Electronics Don State Technical University 1 Gagarin Square Rostov-on-Don344010 Russia Department of Computational Technique and Automated System Software Don State Technical University 1 Gagarin Square Rostov-on-Don344010 Russia Martensstrasse 7 Erlangen91058 Germany Siemens Healthineers Technology Center Guenther-Scharowsky-Str. 1 Erlangen91058 Germany Electrical Engineering Department Czestochowa University Technology Armii Krajowej 17 Częstochowa42217 Poland Departmentof Experimental Physics and Information-measuring Technology Lesya Ukrainka Volyn National University Voli Avenue 13 Lutsk43025 Ukraine J.Dlugosz University Częstochowa Armii Krajowej 13/15 Częstochowa42200 Poland

Exploring better Gamma, X-Ray and IR-Mid-R detectors, adequately sensitive to ambient temperatures and environmental conditions, is highly desirable. Therefore, following this path, we present detecting opportunities, based on data of experimental and theoretical investigation of the electronic and optical properties, photocurrent behavior at different bias voltages as well as the reflection for the He-Cd cw laser after irradiation by three different IR laser wavelengths, for recently grown TlPb2BrI4 single crystal with strong anisotropic, two-dimensional (2D) layered structure. The X-ray photoelectron spectroscopy brings data on binding energy values of core levels of TlPb2BrI4 for both as-grown and Ar+-ion-treated crystal surfaces as well as for elucidation of the energy distribution of the valence electronic states. In opposite to well-known IR-detector materials, TlPb2BrI4 crystal surface shows high chemical stability concerning Ar+-ion bombardment. Further, we carry out ab initio band-structure calculations to gain curves of total and partial densities of states and to elucidate the principal optical constants of TlPb2BrI4. The present studies indicate that, in spite of the fact that the TlPb2BrI4 crystal contains two very hazardous/toxic chemical elements, thallium and lead;however, it is chemically stable and reveals very low hygroscopic behavior when being exposed to environmental conditions. © 2022 Elsevier B.V.

关键词： X ray photoelectron spectroscopy

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Deep active learning for efficient training of a LiDAR 3D object detector

arXiv

引用

arXiv 2019年

作者： Feng, Di Wei, Xiao Rosenbaum, Lars Maki, Atsuto Dietmayer, Klaus Robert Bosch GmbH Corporate Research Driver Assistance Systems and Automated Driving Renningen71272 Germany Institute of Measurement Control and Microtechnology Ulm University Ulm89081 Germany School of Electrical Engineering and Computer Science KTH Royal Institute of Technology Stockholm100 44 Sweden

Training a deep object detector for autonomous driving requires a huge amount of labeled data. While recording data via on-board sensors such as camera or LiDAR is relatively easy, annotating data is very tedious and time-consuming, especially when dealing with 3D LiDAR points or radar data. Active learning has the potential to minimize human annotation efforts while maximizing the object detector's performance. In this work, we propose an active learning method to train a LiDAR 3D object detector with the least amount of labeled training data necessary. The detector leverages 2D region proposals generated from the RGB images to reduce the search space of objects and speed up the learning process. Experiments show that our proposed method works under different uncertainty estimations and query functions, and can save up to 60% of the labeling efforts while reaching the same network performance. Copyright © 2019, The Authors. All rights reserved.

关键词： Object detection

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Mathematical Model Of Telecommunication System With MIMO 3x3

Mathematical Model Of Telecommunication System With MIMO 3x3

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International Conference on Radio Electronics & Info Communications (UkrMiCo)

作者： A. Semenko Y. Shestopal S. Kriviy N. Bokla Institute of computer technology Open University of Human Development "Ukraine" Kyiv Ukraine O.S. Popov Odesa National Academy of Telecommunications Odessa Ukraine Taras Shevchenko National University of Kyiv Kyiv Ukraine Department of Automated design National University of Lviv Polytechnic Lviv Ukraine

ISBN: (数字)9781728126920

ISBN: (纸本)9781728126937

We propose a method for a complete mathematical model developing of TCS with MIMO 3x3 using the theory of vector and matrix analysis. In this case, complex parameters are used that characterize the radio channels, antenna signals and signal processing devices in the receiver. A mathematical model for the system of the signal-to-noise ratio at the output is developed, which allows to determine the reception error of the signal with this type of manipulation. It is emphasized that the proposed method can be used to study the system with any number of transmitting and receiving antennas. Attention is paid to the need of taking into account the peculiarities of the signal propagation in radio channels, antenna orientation and signal processing in the RAKE receiver.

关键词： Mathematical model MIMO communication Receiving antennas Signal processing Transmitting antennas Radio transmitters

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Towards Self-Explainable Cyber-Physical Systems

Towards Self-Explainable Cyber-Physical Systems

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ACM/IEEE International Conference on Model Driven Engineering Languages and Systems Companion

作者： Mathias Blumreiter Joel Greenyer Francisco Javier Chiyah Garcia Verena Klos Maike Schwammberger Christoph Sommer Andreas Vogelsang Andreas Wortmann Institute for Software Systems Hamburg University of Technology Software Engineering Group Leibniz Universitat Hannover Heriot-Watt University Software and Embedded Systems Engineering Technische Universitat Berlin Department of Computing Science University of Oldenburg Heinz Nixdorf Institute and Dept. of Computer Science Paderborn University Automated Systems Engineering Technologies Technische Universitat Berlin Software Engineering RWTH Aachen University

ISBN: (纸本)9781728151267

With the increasing complexity of Cyber-Physical Systems, their behavior and decisions become increasingly difficult to understand and comprehend for users and other stakeholders. Our vision is to build self-explainable systems that can, at run-time, answer questions about the system's past, current, and future behavior. As hitherto no design methodology or reference framework exists for building such systems, we propose the Monitor, Analyze, Build, Explain (MAB-EX) framework for building self-explainable systems that leverage requirements- and explainability models at run-time. The basic idea of MAB-EX is to first Monitor and Analyze a certain behavior of a system, then Build an explanation from explanation models and convey this EXplanation in a suitable way to a stakeholder. We also take into account that new explanations can be learned, by updating the explanation models, should new and yet un-explainable behavior be detected by the system.

关键词： Explainability Self-adaptive systems Cyber-physical systems Adaptive systems Cyber-physical systems MONITOR Runtime Buildings

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Towards self-explainable cyber-physical systems

arXiv

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arXiv 2019年

作者： Blumreiter, Mathias Greenyer, Joel Garcia, Francisco Javier Chiyah Klös, Verena Schwammberger, Maike Sommer, Christoph Vogelsang, Andreas Wortmannz, Andreas Institute for Software Systems Hamburg University of Technology Software Engineering Group Leibniz Universität Hannover Germany Heriot-Watt University Software and Embedded Systems Engineering Technische Universität Berlin Germany Department of Computing Science University of Oldenburg Heinz Nixdorf Institute Dept. of Computer Science Paderborn University Automated Systems Engineering Technologies Technische Universität Berlin Germany Software Engineering RWTH Aachen University

With the increasing complexity of Cyber-Physical Systems, their behavior and decisions become increasingly difficult to understand and comprehend for users and other stakeholders. Our vision is to build self-explainable systems that can, at run-time, answer questions about the system's past, current, and future behavior. As hitherto no design methodology or reference framework exists for building such systems, we propose the Monitor, Analyze, Build, Explain (MAB-EX) framework for building self-explainable systems that leverage requirements- A nd explainability models at run-time. The basic idea of MAB-EX is to first Monitor and Analyze a certain behavior of a system, then Build an explanation from explanation models and convey this EXplanation in a suitable way to a stakeholder. We also take into account that new explanations can be learned, by updating the explanation models, should new and yet unexplainable behavior be detected by the system. Copyright © 2019, The Authors. All rights reserved.

关键词： Embedded systems

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A Situation-Aware Collision Avoidance Strategy for Car-Following

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IEEE/CAA Journal of Automatica Sinica 2018年第5期5卷 1012-1016页

作者： Li Li Fellow IEEE Xinyu Peng Fei-Yue Wang ieee department of automation bnristtsinghua universityBeijing l00084China the department of automation tsinghua universityBeijing l00084China state key laboratory of management and control for complex systems institute of automationchinese academy of sciencesBeijing 100080China the driver cognition and automated driving laboratory university of waterlooWaterloo N2L 3GlCanada the department of electrical and computer engineering purdue school of engineering and technologyindiana university-purdue university indianapolisIndiana 46202-5l32USA

Abstract--In this paper, we discuss how to develop an appropriate collision avoidance strategy for car-following. This strategy aims to keep a good balance between traffic safety and efficiency while also taking into consideration the unavoidable uncertainty of position/speed perception/measurement of vehicles and other drivers. Both theoretical analysis and numerical testing results are provided to show the effectiveness of the proposed strategy. Index Terms--Collision avoidance, safety, traffic efficiency, uncertainty.

关键词： Collision avoidance safety traffic efficiency uncertainty

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Algorithm Parallelizing for Classifying the Complex Systems

Algorithm Parallelizing for Classifying the Complex Systems

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IEEE Conference on Quality Management, Transport and Information Security, Information Technologies (IT&MQ&IS)

作者： Elizaveta K. Edgulova Zamir G. Lamerdonov Tatiana Yu. Khashirova Larisa A. Moskalenko Vladimir A. Denisenko College of Information Technology and Economics Kabardino-Balkarian State University Nalchik Russia Department of Environmental and Water Construction Kabardino-Balkarian State Agrarian University Nalchik Russia Institute of Informatics Electronics and Computer Technologie Kabardino-Balkarian State University Nalchik Russia Head of the Center for Automated Information Systems Kabardino-Balkarian State University Nalchik Russia

The article presents one of the approaches to parallelizing the classification of algorithm for complex systems in condition of uncertainty. The offered variant of the parallelization of the classification of algorith... 详细信息

ISBN: (纸本)9781538667583

关键词： Classification algorithms Complex systems Databases Training Information systems Uncertainty Mathematical model

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High Density Valet Parking Using k-Deques in Driveways

High Density Valet Parking Using k-Deques in Driveways

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IEEE Intelligent Vehicles Symposium

作者： Holger Banzhaf Frank Quedenfeld Dennis Nienhuser Steffen Knoop J. Marius Zollner Robert Bosch GmbH Corporate Research Driver Assistance Systems and Automated Driving 71272 Renningen Germany University of Technology Braunschweig Institute of Operating Systems and Computer Networks 38106 Braunschweig Germany Research Center for Information Technology (FZI) 76131 Karlsruhe Germany

ISBN: (纸本)9781509048052

Advances in autonomous driving and the introduction of automated valet parking allow the optimization of parking space. A future concept is high density valet parking with the potential to either reduce the extensive land use for parking or increase the capacity of existing parking facilities. This paper presents a novel approach that integrates high density parking into an existing parking lot, by explicitly making use of parking in the driving lane and reducing the shunting operations per vehicle. The proposed parking scheme allows vehicles to park either perpendicular to the driveway or in double-ended queues with k parking spots (k-deque) on the side of the driving lane. Leveraging the potential of such a layout increases the capacity of a parking lot by up to 25%, while keeping the maximum number of shunts per car below [k/2]+1 between entry and exit. A dynamic simulation verifies the theoretical analysis and compares the performance of different deque lengths with respect to the distances traveled and the number of shunts per vehicle.

关键词： Automobiles Layout Optimization Urban areas Sensors Geometry Vehicle dynamics Parking Drive ways layouts Vehicle dynamics Automobiles urban area parking lots Cars geometry Sensors Shunts (electrical) vehicle High density

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A Retinal Blood Vessel Segmentation Approach Based on Top-hat Transformation

A Retinal Blood Vessel Segmentation Approach Based on Top-ha...

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2017 2nd International Conference on Mechatronics and Information technology(ICMIT 2017)

作者： Weihua Wang Wenyuan Wu Jiao Yin Chongqing Key Laboratory of Automated Reasoning and Cognition Chongqing Institute of Green and Intelligent Technology Chinese Academy of Sciences School of Computer and Control Engineering University of Chinese Academy of Sciences School of Software Engineering Chongqing University of Arts and Sciences

The analysis of retinal blood vessel plays an important role in aided diagnosis, segmenting blood from retinal fundus images is the first operation. This paper proposes a novel approach for retinal blood vessel automatic segmentation. First, the top-hat transformation is used for blood vessel enhancement. Second, using double-threshold to segment the vessels from the enhanced fundus image, the high threshold is used for main vessel segmentation, and the low threshold is used for finer vessel segmentation. Third, fusing the finer blood vessels into main blood vessels. The experiment is tested in public fundus image database STARE. The result of the experiment shows that the method obtains good visual effect.

关键词： Double threshold Blood Vessel Segmentation Fundus Image

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Numerical method for real root isolation of semi-algebraic system and its applications

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Journal of Computational and Theoretical Nanoscience 2016年第1期13卷 803-811页

作者： Ji, Zhenyi Wu, Wenyuan Feng, Yong Li, Yi Qin, Xiao Lin Sichuan Agricultural University Chengdu611830 China Chongqing Key Laboratory of Automated Reasoning and Cognition Chongqing Institute of Green and Intelligent Technology Chinese Academy of Science Chongqing400714 China Laboratory of Automated Reasoning and Programming Chengdu Institute of Computer Applications Chinese Academy of Science Chengdu610041 China

In this paper, based on the homotopy continuation method and the interval Newton method, an efficient algorithm is introduced to isolate the real roots of semi-algebraic system. Tests on some random examples and a variety of problems including transcendental functions arising in many applications show that the new algorithm reduces the cost substantially compared with the traditional symbolic approaches. © 2016 American Scientific Publishers All rights reserved.

关键词： Numerical methods

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