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检索条件"任意字段=9th International Conference on Parallel and Distributed Computing, Applications and Technologies"

共 1770 条记录，以下是181-190 订阅

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COMPLETE DECENTRALIZATION of distributed DATA STORAGES BASED on BLOCKCHAIN TECHNOLOGY 9

COMPLETE DECENTRALIZATION of DISTRIBUTED DATA STORAGES BASED...

引用

9th international conference "distributed computing and Grid technologies in Science and Education", GRID 2021

作者： Demichev, Andrey Kryukov, Alexander Skobeltsyn Institute of Nuclear Physics Lomonosov Moscow State University Moscow Russia

the work presents a solution for completely decentralized data management systems in geographically distributed environments with administratively unrelated or loosely related user groups and in conditions of partial or complete lack of trust between them. the solution is based on the integration of blockchain technology, smart contracts and provenance metadata driven data management. Architecture, operation principles and algorithms developed provides fault-tolerant, safe and reliable management of provenance metadata, control of operations with data files, as well as resource access management in collaborative distributed computing systems. the latter refer to distributed systems formed by combining into a single pool of computer resources of various organizations (institutions) to work together in the framework of some project. Copyright © 2021 for this paper by its authors. Use permitted under Creative Commons License Attribution 4.0 international (CC BY 4.0).

关键词： Blockchain

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JINR WLCG TIER1 & TIER2/CICC ACCOUNTING SYSTEM 9

JINR WLCG TIER1 & TIER2/CICC ACCOUNTING SYSTEM

引用

9th international conference "distributed computing and Grid technologies in Science and Education", GRID 2021

作者： Kashunin, Ivan Mitsyn, Valery Strizh, Tatiana Meshcheryakov Laboratory of Information Technologies Joint Institute for Nuclear Research 6 Joliot-Curie Moscow region Dubna 141980 Russia

the problem of evaluating the efficiency of the JINR MLIT grid sites has always been topical. At the beginning of 2021, a new accounting system was created, it managed to fully cover the functionality of the previous system and further expand it. the article provides detailed information on the implemented accounting system. © 2021 CEUR-WS. All rights reserved.

关键词： Accounting Grid Monitoring WLCG

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New Bounds For distributed Mean Estimation and Variance Reduction 9

New Bounds For Distributed Mean Estimation and Variance Redu...

引用

9th international conference on Learning Representations, ICLR 2021

作者： Davies, Peter Gurunathan, Vijaykrishna Moshrefi, Niusha Ashkboos, Saleh Alistarh, Dan IST Austria Austria IIT Bombay India NeuralMagic

We consider the problem of distributed mean estimation (DME), in which n machines are each given a local d-dimensional vector xv ∈ d, and must cooperate to estimate the mean of their inputs (Equation presented). while minimizing total communication cost. DME is a fundamental construct in distributed machine learning, and there has been considerable work on variants of this problem, especially in the context of distributed variance reduction for stochastic gradients in parallel SGD. Previous work typically assumes an upper bound on the norm of the input vectors, and achieves an error bound in terms of this norm. However, in many real applications, the input vectors are concentrated around the correct output µ, but µ itself has large norm. In such cases, previous output error bounds perform poorly. In this paper, we show that output error bounds need not depend on input norm. We provide a method of quantization which allows distributed mean estimation to be performed with solution quality dependent only on the distance between inputs, not on input norm, and show an analogous result for distributed variance reduction. the technique is based on a new connection with lattice theory. We also provide lower bounds showing that the communication to error trade-off of our algorithms is asymptotically optimal. As the lattices achieving optimal bounds under 2-norm can be computationally impractical, we also present an extension which leverages easy-to-use cubic lattices, and is loose only up to a logarithmic factor in d. We show experimentally that our method yields practical improvements for common applications, relative to prior approaches. © 2021 ICLR 2021 - 9th international conference on Learning Representations. All rights reserved.

关键词： Lattice theory

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Active Synchronous Rectifier based parallel Interleaved Converter for EV Battery Charging

Active Synchronous Rectifier based Parallel Interleaved Conv...

引用

international conference on Circuit, Power and computing technologies (ICCPCT)

作者： M. Karunakaran R. Sridevi V. Suresh V. K. Dinesh Prabu Department of Electrical and Electronics Engineering S.K.P Engineering College Tiruvannamalai India

ISBN: (数字)9798350372816

ISBN: (纸本)9798350372823

Electric Vehicles (EVs) uses rechargeable battery packs to store electrical energy, necessitating periodic recharging for continued operation. the efficiency and speed of EV battery charging are crucial factors in their practicality for daily use. Charging methods vary, from slow household outlet charging to rapid charging at public stations. Technological advancements have spurred the development of sophisticated charging systems, aiming to enhance efficiency, shorten charging durations, and extend battery lifespan. this paper proposes an interleaved high-frequency inverter-based isolated EV charger. It entails designing a single-phase high-frequency inverter utilizing Pulse Width Modulation (PWM) control circuitry, which simplifies the generation of sinusoidal pulses for transistor switches. A synchronous rectifier designed for renewable energy applications, together with a power factor correction (PFC) Single Ended Primary Inductor Converter (SEPIC), are included in the implementation. this control strategy significantly broadens the adjustable output voltage range while ensuring smooth voltage delivery. An isolation transformer adds a layer of protection through electrical separation, while the interleaved parallel topology-based synchronous rectifier minimizes high-frequency rectification losses. Additionally, a capacitive filter reduces ripple voltage in the output. Performance analysis of this technique is conducted in the MATLAB/Simulink environment, providing insights into its effectiveness and feasibility. the proposed converter shows an efficiency of 93.47% and voltage gain of 1:9.

关键词： Rectifiers Pulse width modulation Transformers Electric vehicles Inverters Batteries Transistors

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SIMULATION MODEL of AN HPC SYSTEM for SUPER CHARM-TAU FACTORY 9

SIMULATION MODEL of AN HPC SYSTEM for SUPER CHARM-TAU FACTOR...

引用

9th international conference "distributed computing and Grid technologies in Science and Education", GRID 2021

作者： Wiens, Dmitry Chernykh, Igor Logashenko, Ivan Kolpakov, Fedor Vorobiev, Vitaluy Institute of Computational Mathematics and Mathematical Geophysics Siberian Branch Russian Academy of Science 6 Akad. Lavrentieva Pr. Novosibirsk630090 Russia 11 Acad. Lavrentieva Pr. Novosibirsk630090 Russia Federal Research Center for Information and Computational Technologies 6 Akad. Lavrentieva Pr. Novosibirsk630090 Russia

this paper describes the design of a simulation model of the infrastructure for data processing from the Super Charm-Tau factory class "megasience" electron-positron collider. the model simulates the behavior of the main subsystems of a supercomputer, such as the task scheduler, computing clusters, data storage system, etc. Using simulation modeling allows for the maximally reliable representation of the exact characteristics and volume of the needed equipment for developing the desired HPC system. the simulation model accounts for all the aspects of operation of this system from parallel data storage system to arrangement of the parallel launch of tasks. the developed system for processing software errors and equipment failures, as well as the system for ensuring energy efficiency make it possible to estimate the needed equipment with account for all possible emergency situations. this model allows calculating the parameters of the computing system necessary for processing and storing the results of operation of the Super Charm-Tau factory after its commissioning. © 2021 CEUR-WS. All rights reserved.

关键词： Supercomputers

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DETECTION of FERTILE SOILS BASED on SATELLITE IMAGERY PROCESSING 9

DETECTION of FERTILE SOILS BASED on SATELLITE IMAGERY PROCES...

引用

9th international conference "distributed computing and Grid technologies in Science and Education", GRID 2021

作者： Grishkin, Valery Zhivulin, Evgeniy Khokhriakova, Anastasiia Karimov, Sardor Saint Petersburg State University 7-9 Universitetskaya nab. Saint Petersburg199034 Russia

the paper proposes a method for detecting fertile soils based on the processing of satellite images. As a result of its application, a map of the location of fertile and infertile soils for a given region of the earth's surface is formed and the corresponding areas are calculated. the method for detecting fertile soils is based on the fact that fertile soil includes areas covered with vegetation in the spring-summer period. therefore, by measuring the spectral characteristics of these areas in the late autumn period, when there is no vegetation on them, it is possible to obtain objective parameters of fertile soils. For detection, a number of classifiers are being built that recognize two classes - fertile soil and sand, which is especially important when monitoring areas prone to desertification. the feature vector used for classification is a set of indices similar to the well-known NDVI index. this set of indices is calculated for each pixel of the image by its values in different spectral channels. Classifiers are implemented using CUDA parallel computing technology on a GPU. Based on the results of the experimental study, a classifier is selected that has shown the best characteristics of the recognition quality. Copyright © 2021 for this paper by its authors. Use permitted under Creative Commons License Attribution 4.0 international (CC BY 4.0).

关键词： Image segmentation

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JIRA PLUGIN for the ALICE INSTANCE 9

JIRA PLUGIN for the ALICE INSTANCE

引用

9th international conference "distributed computing and Grid technologies in Science and Education", GRID 2021

作者： Kondratyev, Andrey Bondyakov, Aleksey Meshcheryakov Laboratory of Information Technologies Joint Institute for Nuclear Research Russia Joliot-Curie 6 Dubna Moscow region 141980 Russia

As a bug tracking and project management system, the ALICE experiment uses Jira Software, which provides a wide range of configuration options. Jira also allows one to significantly expand the basic functionality with custom plugins. In this work, the LinkedIssuesHasStatus plugin for the JIRA service of the ALICE experiment is developed and implemented. the plugin returns tickets that link issues in the specified status and that are linked with the specified linking type. Copyright © 2021 for this paper by its authors. Use permitted under Creative Commons License Attribution 4.0 international (CC BY 4.0).

关键词： Java programming language

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PARTICIPATION of Russian INSTITUTES in the PROCESSING and STORAGE of ALICE DATA 9

PARTICIPATION of Russian INSTITUTES in the PROCESSING and ST...

引用

9th international conference "distributed computing and Grid technologies in Science and Education", GRID 2021

作者： Kiryanov, Andrey Zarochentsev, Andrey Petersburg Nuclear Physics Institute of NRC "Kurchatov Institute" 1 Orlova Rocha Gatchina 188300 Russia Saint Petersburg State University 7-9 Universitetskaya emb. Saint Petersburg199034 Russia

this report presents the results of the work of Russian institutes in the processing of ALICE experiment data during the last 3 years of the operation of the Large Hadron Collider (LHC) including the end of the LHC Run2 and the 1st year of the COVID-19 pandemic. the main problems and tasks facing both ALICE Grid computing and its Russian segment before the LHC Run3 including the problems of support and modernization of existing resources are considered. Also, plans for the preparation for the operation of the LHC in the HL (High Luminosity) mode are presented. Copyright © 2021 for this paper by its authors. Use permitted under Creative Commons License Attribution 4.0 international (CC BY 4.0).

关键词： Grid computing

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IPV6 DUAL-STACK DEPLOYMENT for the distributed computing CENTER 9

IPV6 DUAL-STACK DEPLOYMENT for the DISTRIBUTED COMPUTING CEN...

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9th international conference "distributed computing and Grid technologies in Science and Education", GRID 2021

作者： Kotliar, Anna Kotliar, Viktor Institute for High Energy Physics named by A.A. Logunov National Research Center "Kurchatov Institute" Nauki Square 1 Protvino Moscow region 142281 Russia

computing center of the Institute for High Energy Physics in Protvino provides computing and storage resources for various HEP experiments (Atlas, CMS, Alice, LHCb) and currently operates more than 150 working nodes with around 3000 cores and provides near 2.5 PB of disk space. All these resources are connected through two 10 GB/s links to LHCONE and other research networks. IHEP computing center has IPv4 address space limited to one C-sized network and all computing nodes working behind the NAT that has some drawbacks for production use. To optimize routing, switching and to get higher network throughput for data transfer the IPv6 dual-stack was deployed on the computing farm. this work shows the full cycle of the real IPv6 dual-stack deployment from zero to production. Copyright © 2021 for this paper by its authors. Use permitted under Creative Commons License Attribution 4.0 international (CC BY 4.0).

关键词： Data transfer

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SOLVING the PROBLEMS of BYZANTINE GENERALS USING BLOCKCHAIN TECHNOLOGY 9

SOLVING the PROBLEMS of BYZANTINE GENERALS USING BLOCKCHAIN ...

引用

9th international conference "distributed computing and Grid technologies in Science and Education", GRID 2021

作者： Bogdanov, Alexander Degtyarev, Alexander Shchegoleva, Nadezhda Korkhov, Vladimir Zaynalov, Nodir Kiyamov, Jasur Dik, Aleksandr Faradzhov, Anar Saint Petersburg State University 7-9 Universitetskaya emb. Saint Petersburg199034 Russia Samarkand Branch Tashkent University of Information Technology Uzbekistan Plekhanov Russian University of Economics 36 Stremyanny lane Moscow117997 Russia

the process of digitalization of the Russian economy as the basis for the transition to the digital economy is conditioned by the requirements of objective reality and is based, first of all, on the introduction of digital technologies into the activities of its actors. the most promising is the Blockchain technology, which has the capabilities of the most effective coordination of the economic interests of the actors of the digital economy and is applicable in various spheres of economic activity. the article discusses the basics of cryptocurrencies and blockchain operation, as well as the technologies in which this "Tasks of Byzantine generals" (decision-making tasks) occurs. A comparison is made for solution of the problem with different blockchain technologies with several platforms that prevent behavior dangerous for transactions network and thereby increasing the competitiveness of the cryptocurrency. © 2021 CEUR-WS. All rights reserved.

关键词： distributed ledger

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