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Kondo effect at ultimate atomic-scale two-dimensional limit: Au/Si(111)3×3 reconstruction with embedded Cr atoms

Physical Review B 2020年第19期102卷 195113-195113页

作者： A. V. Matetskiy N. V. Denisov D. V. Gruznev L. V. Bondarenko A. Y. Tupchaya A. N. Mihalyuk A. V. Zotov A. A. Saranin Institute of Automation and Control Processes FEB RAS Vladivostok 690041 Russian Federation School of Natural Sciences Far Eastern Federal University Vladivostok 690950 Russian Federation

The occurrence of the Kondo effect in the ultimate two-dimensional (2D) case, when the thickness of the conducting film is reduced down to the atomic-scale limit, was explored taking the Tl-adsorbed Au/Si(111)3×3 reconstruction with embedded Cr atoms as a prototype system. The reconstruction is essentially an atomic-layer film, which resides on a semiconductor Si(111) substrate and demonstrates conductivity of a metallic type, at least down to 1.8 K. The tight binding of Cr atoms in the interstitial sites surrounded by six Si atoms prevents them from clustering. The Kondo effect in this system was investigated experimentally using low-temperature scanning tunneling spectroscopy and electronic transport measurements. Both techniques yield a Kondo temperature of ∼70–80K. A substantial increase of the sample resistivity caused by adding Cr atoms is believed to be a specific feature of the extremely thin metallic films, where small amounts of magnetic impurities can effectively block off the narrow conduction channel.

关键词： Electrical conductivity Kondo effect Surface states Two-dimensional electron system Density functional theory Resistivity measurements Scanning tunneling microscopy Scanning tunneling spectroscopy

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Designing Method of Information-control Systems Realization for Visual Programming Robotic Manipulators

Designing Method of Information-Control Systems Realization ...

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International Conference on Industrial Engineering, Applications and Manufacturing (ICIEAM)

作者： Dmitry Yukhimets Andrey Sakhnenko Alexander Sych Laboratory of Robotic Systems Institute of Automation and Control Processes FEB RAS Vladivostok Russia Laboratory of Intelligent Control Systems Institute of Marine Technology Problems FEB RAS Vladivostok Russia Department of Automation and Control Far Eastern Federal University Vladivostok Russia

ISBN: (数字)9781728145907

ISBN: (纸本)9781728145914

The paper considers a universal approach to the design and implementation of information control systems (ICS) that use a human-machine interface for interaction with automatic control systems (ACS) of robotic manipulators. The proposed approach allows you to create and edit control program of manipulator's movements, as well as to simulate its execution regardless of the hardware implementation of the control object. It is assumed that the system implemented in accordance with this approach can be implemented in the control of various industrial robotic manipulators and is considered as a highly effective alternative to the common control tools for manipulators and their working tools, thus representing a universal control panel for robotic complexes. Moreover, the use of such a universal remote control can occur autonomously from existing robots, this is significant advantage over popular alternatives. An example and effectiveness of such an implementation are considered.

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Designing a Method for Constructing Distributed Open ACS Based on the ESP-NOW Wireless Protocol

Designing a Method for Constructing Distributed Open ACS Bas...

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International Russian automation Conference (RusAutoCon)

作者： Dmitry Yukhimets Alexander Sych Andrey Sakhnenko Laboratory of Robotic Systems Institute of Automation and Control Processes FEB RAS Vladivostok Russia Laboratory of Intelligent Control Systems Institute of Marine Technology Problems FEB RAS Vladivostok Russia Department of Automation and Control Far Eastern Federal University Vladivostok Russia

ISBN: (数字)9781728161303

ISBN: (纸本)9781728161310

A new approach to the implementation of open distributed automatic control systems based on use of cheap computing nodes from the manufacturer Espressif, exchanging data via the ESP-NOW wireless protocol, is proposed. Due to the used data transfer protocol, it became possible to quickly and losslessly transfer data packets between computing nodes, which favorably affected the operation of the entire system as a whole. The solution proposed in the work allows the use of distributed automatic control systems (ACS) to control complex mechatronic objects, such as industrial manipulators, and allows location of computing nodes at remote points in the workspace. This fact is confirmed by the performance indicators obtained during testing of a real system. The paper proposes the basic architecture of such a system and describes the features of the implementation of individual nodes, presents diagrams of the classes of microprograms contained in computing nodes.

关键词： Sensors Peer-to-peer computing Protocols Microcontrollers Actuators Wireless communication automation

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Numerical Calculation of the Temperature Field Distribution in a Cylindrical Fuel Element, Taking into Account the Eccentricity of the Fuel Pellet and the Variable Thermophysical Characteristics of the Materials

Numerical Calculation of the Temperature Field Distribution ...

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2020 International Multi-Conference on Industrial Engineering and Modern Technologies, FarEastCon 2020

作者： Amosova, E.V. Shishkin, A.V. Institute of Applied Math Far Eastern Federal University Far Eastern Department of Ras Vladivostok Russia Institute of Automation and Control Processes Far Eastern Federal University Far Eastern Department of Ras Vladivostok Russia

ISBN: (纸本)9781728169514

Fuel elements are the most critical elements of the core of a nuclear reactor. In the general case, a fuel rod consists of an airtight cladding, inside of which nuclear fuel pellet is placed. The fuel rod cladding provides the required mechanical strength to the structure and protects the fuel from the corrosive and erosive influence of the coolant on it. © 2020 IEEE.

关键词： Pelletizing

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Information and analytical environment to support scientific research in geology: Current status and development perspectives 5

Information and analytical environment to support scientific...

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5th International Conference Information Technologies in Earth Sciences and Applications for Geology, Mining and Economy, ITES and MP 2019

作者： Platonov, Kirill A. Naumova, Vera V. Eremenko, Vitaliy S. Dyakov, Sergey E. Vernadsky State Geological Museum RAS Russia Vernadsky State Geological Museum RAS Moscow Russia Institute of Automation and Control Processes FEB RAS Vladivostok Russia

The work describes the development and adaptation of methods and technologies for processing and analysis of territorially distributed heterogeneous geological information and services of its processing. The basis of the information-analytical environment for geology scientific support and maintenance, designed on the base of created approaches, methods and technologies, integrating territorially distributed geological information with the use of special services, its analysis and processing. The authors suppose that the developed platform of processing and analysis thematic services management, which is a part of the information-analytical environment, will provide an access to the modern knowledge-intensive algorithms and computing resources storages, required for expeditious processing of geological data large arrays. Copyright © 2019 for this paper by its authors.

关键词： Geology

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SPE grown BaSi2 on Si(111) substrates: Optical and photoelectric properties of films and diode heterostructures on their base

SPE grown BaSi2 on Si(111) substrates: Optical and photoelec...

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作者： Galkin, Nikolay G. Goroshko, Dmitrii L. Dubov, Viktor L. Fomin, Dmitrii V. Galkin, Konstantin N. Chusovitin, Evgenii A. Chusovitina, Svetlana V. Institute of Automation and Control Processes FEB RAS Radio Str. 5 Vladivostok690022 Russia Amur State University Ignatievskoe Shosse Blagoveshchensk 21 675027 Russia Far Eastern Federal University FEFU Campus 10 Ajax Bay Russky Island Vladivostok Russia

The study of the optical properties of BaSi2 films grown on n-type silicon by solid-phase epitaxy showed that the band gap of BaSi2 is about 1.20 eV. Formed Al/BaSi2/Si mesa-diodes showed the presence of two maxima in the photoresponse spectra at 1.15-1.20 eV and 1.5-1.6 eV at 300 K and spectra expansion to 0.7 eV at 80 K. Analysis of the I-V characteristics and photoresponse spectra at two biases showed that a BaSi2-n/Si-n isotype heterojunction is formed with a double barrier layer, quasi-linear I-V characteristics, and contribution of defect states to the photoresponse at 80 K. Band diagrams of the BaSi2-n/Si-n heterojunction with surface states at zero, forward and reverse biases were constructed, which made it possible to explain features in the photoresponse spectra at energies of 1.0-2.1 eV and the first detected IR photoresponse at 0.7-1.0 eV based on charging and photogeneration of defect states at 80 K. © 2020 The Japan Society of Applied Physics.

关键词： Optical properties

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Human machine interface based on virtual reality for programming industrial robots 3

Human machine interface based on virtual reality for program...

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3rd International Conference on control, automation and Diagnosis, ICCAD 2019

作者： Filaretov, Vladimir Yukhimets, Dmitry Mursalimov, Eduard Gubankov, Anton Zuev, Alexander Anisimov, Sergey Far Eastern Federal University Vladivostok Russia Institute of Automation and Control Processes FEB RAS Vladivostok Russia Institute of Marine Technology Problems FEB RAS Vladivostok Russia Innopolis University Innopolis Russia

ISBN: (纸本)9781728122922

In the paper the new approach to the automated generation of the industrial robot tool trajectory was developed. This approach is based on the use of the operator interface implemented in the virtual reality environment. This interface displays a three-dimensional model of the industrial robot working area, obtained by means of the computer vision system. This model is used to specify the tool trajectory. The proposed interface allows to simplify and accelerate the industrial robots programming for perform technological operations in a working environment. © 2019 IEEE.

关键词： Industrial robots

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Development of Fault Detection and Identification System for Thrusters of Underwater Robots

Development of Fault Detection and Identification System for...

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2019 International Multi-Conference on Industrial Engineering and Modern Technologies, FarEastCon 2019

作者： Filaretov, V. Zuev, A. Zhirabok, A. Far Eastern Federal University Vladivostok Russia Institute of Automation and Control Processes FEB RAS Vladivostok Russia Institute of Marine Technology Problems FEB RAS Vladivostok Russia Innopolis University Innopolis Russia

ISBN: (纸本)9781728100616

The paper is dedicated to solving of on-line fault detection and identification for thrusters of underwater robots. To detect and estimate the possible typical faults, bank of sliding mode observers is proposed. The new approach to construct such a bank of observers, based on the reduced model of the initial systems, is suggested and developed. This approach allows reducing complexity of the observers. The effectiveness of the proposed system was confirmed by computer simulation. © 2019 IEEE.

关键词： Fault detection

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Proxy Service for a Distributed Interactive User Interface of Computing Cluster Jobs

Proxy Service for a Distributed Interactive User Interface o...

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International Multi-Conference on Industrial Engineering and Modern Technologies (FarEastCon)

作者： D.I. Kharitonov D.V. Leontev D.S. Odyakova R.V. Parakhin Shared Resource Center “Far Eastern Computing Resource” IACP FEB RAS Institute of Automation and Control Processes Far Eastern Branch of the Russian Academy of Sciences (IACP FEB RAS) Vladivostok Russia

ISBN: (数字)9781728169514

ISBN: (纸本)9781728169521

This article discusses the issue of interaction with the custom task workflows on clusters their execution. Since tasks on multiprocessor systems can be performed for long periods of time, they should be quasi-interactive, allowing the occasional appearance of the user to input corrective instructions. In this article a proxy service is proposed that is an extension of the event-driven job management subsystem on the cluster. When launching computational experiments with event control, then the event control subsystem agent executed on the computational nodes prepares the environment for tracking the events of the experiment by operational system means. After the computations are done the event control subsystem agent clears up operational system settings for tracking events. The role of proxy service is to interact with the event control subsystem, listen to events and output streams that come from the parallel program, keep track of changes in the parallel program filesystem in its own database, and when is asked return information on the parallel program state and files to a user interface, or feed input data back to the parallel program. The article also discusses an I/O agent that is launched on each node of the computational cluster immediately before starting the computational process. The agent normally intercepts stdin and stdout streams from the controlled process, but can also interact with it via sockets, increasing the capabilities of the computing process to interact with the user.

关键词： Process control Task analysis Computational modeling Databases Instruction sets User interfaces Sockets

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The Support Library for Developing Scientific Data Collections Access Portals

The Support Library for Developing Scientific Data Collectio...

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International Multi-Conference on Industrial Engineering and Modern Technologies (FarEastCon)

ISBN: (数字)9781728169514

ISBN: (纸本)9781728169521

The article discusses an approach to the automated construction of web-portals for access to scientific data collections based on the data domain model and a support library used to generate a web interface “online”. automation of construction is based on an architectural generation scheme, which contains: a modeling apparatus represented by a template graph of a metalanguage and prototypes of description elements in a metalanguage; a domain model, consisting of a graphical ER-model and its objects representation; and a life cycle, consisting of a model in terms of Petri nets and an object representation for events in the model. Source code generation is performed in two stages. At the first stage, the objects of the original model form the view in each functional layer. In the second stage, generator produces output files for each functional layers corresponding to life cycle events. The support library presented in this article simplifies the generation of an interconnected set of files necessary to build the interface using the Django framework, which consists of: a page template, a CSS-style file for the page design, Javascript functions for the browser-side user interface, a Python file with a class corresponding to an interface page, as well as AJAX functions on the web server side required to display complex data. To ensure the consistency of the resulting set of files, URLs for AJAX functions are generated automatically and proxy functions in Javascript are produced that make a remote call to the server. The support library described in the article and the approach to automating the construction of information systems allows to formalize the users' understanding of the subject area, describe the interface and specify the data processing methods.

关键词： Information systems Data models Databases Libraries Portals Generators Mathematical model

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