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EN
IP scheduled throughput defined according to 3GPP TS 36.314 reflects user throughput regardless of traffic characteristics, and therefore has become one of the most important indicators for monitoring Quality of Service (QoS) of the end user in Evolved Universal Terrestrial Radio Access Network (E-UTRAN). However, networks built on a distributed architecture make the above definition impossible to be applied directly due to the implementation challenges. This paper gives an overview of the classical Long Term Evolution (LTE) architecture as opposed to Dual Connectivity (DC) topology and focuses on a novel method of solving the calculation issue with the IP scheduled throughput measurement in edge computing environment. Experimental results show a good agreement with the real end user perception.
EN
The purpose of this article is to introduce to the methodology of increasing electromagnetic compatibility in distributed system, on the example of the implementation of works in the field: "Research and improvement of electromagnetic compatibility of railway traffic control devices and rolling stock", which are the subject of the BRIK project. The methodology is defined here as a set of rules for conducting research in order to achieve an intended goal. The article proposes a procedure to improve the EMC condition of distributed systems. For monitoring the quality of the system operation in terms of electromagnetic compatibility, the implementation of the OEE indicator was suggested.
EN
In this paper,we consider an infinite dimensional linear systems. It is assumed that the initial state of system is not known throughout all the domain Ω C Rn, the initial state x0 ϵ L2(Ω) is supposed known on one part of the domain Ω and uncertain on the rest. That means Ω = ω1 U ω2 U... U ωt with ωi ∩ ωj = ∅, ∀i ≠ j ϵ {1,...,t}, i ≠ j where ωi ≠ ∅ and x0(θ) = αi for θ ϵ ωi, ∀i, i.e., x0(θ) = [wzór] (θ) where the values α1,...,αr are supposed known and αr+1,...,αt unknown and 1ωi is the indicator function. The uncertain part (α1,...,(α)rof the initial state x0 is said to be (ɛ1,...,ɛr )-admissible if the sensitivity of corresponding output signal (yi)i≥0 relatively to uncertainties (αk)1≤k≤r is less to the treshold ɛk, i.e., ∥∂yi)/(∂αk∥ ≤ ɛk, ∀i≥ 0, ∀k ϵ {1,...,r]. The main goal of this paper is to determine the set of all possible gain operators that makes the system insensitive to all uncertainties. The characterization of this set is investigated and an algorithmic determination of each gain operators is presented. Some examples are given.
PL
Przedstawiono architekturę i najnowsze funkcje centralnego serwera (centrum) w rozproszonym systemie monitorowania akwenów morskich opracowanym dla straży granicznej. System umożliwia prezentację bieżącej i archiwalnej sytuacji na mapie, obrazu z kamer, rozmów telefonicznych oraz plików i wiadomości tekstowych (SMS) wymienianych przez funkcjonariuszy straży granicznej. W artykule skupiono się na nowych funkcjonalnościach centrum, związanych ze sterowaniem kamerami oraz wizualizacją danych radarowych przechowywanych w serwerach archiwizacji pochodzących z radarów ARPA oraz Terma SCANTER 2001.
EN
The paper presents the architecture and the latest functionalities of the central server (Center), which is used in the distributed system developed for the Polish Border Guard for monitoring maritime areas. The system allows presentation of current and archival map data, video from cameras, audio from telephone connections as well as files and text messages (SMS) exchanged by Border Guard units. The paper focuses on new functionalities of the Center regarding control of cameras and visualization of radar data stored in the Archive Servers coming from ARPA and Terma SCANTER 2001 radars.
EN
Clusters and distributed systems allow for error tolerance and high performance through shared use of the load. When all computers work, we would like to distribute the load equally among computers. When one or more computers are broken, the load on these computers should be redistributed to other computers in the cluster. Redistribution determines the recovery scheme. The recovery plan should keep the load as optimal as when even the most unfavorable combinations of computers are turned off, that is, we want to optimize the behavior of the worst case. In this work, we find new regeneration schemes based on so-called IRB and ideal ring loops and synthesize the corresponding combinatorial structures. They are optimal for many cases of recovery schemes.
EN
In a following article problem of a information sharing in distributed systemis described, as wellways of solving that problem with emphasize on Gossip protocol are presented. Furthermore the application has been creating allowing to test the Gossip protocol in a lab environment. Gossip protocol is highly parameterized and can be working in several modes. The main goal of the article is to examine the work of the Gossip algorithm, depending on the chosen mode and values of parameters, and analyses of a results.
PL
Artykuł jest próbą nakreślenia problemów związanych z modelowaniem powierzchni rozwijalnych z wykorzystaniem systemów klasy CAx. Przedstawiono w nim podstawowe zagadnienia dotyczące modelowania takich obiektów oraz zaproponowano możliwe sposoby realizacji tego typu zadań. Uwaga autorów skupia się na wykorzystaniu technik modelowania autogenerującego w celu automatyzacji procesu projektowania powierzchni rozwijalnych.
EN
This paper is an attempt to deal with problems related to designing of unfolded surfaces in CAx systems. In the paper main problems during a modelling process of such type objects are described. Additionally, some way of how to deal with this task are shown. Authors’ main focus is on using the generative modelling techniques in order to automate the designing process of the unfolded surfaces.
EN
The paper presents the optimized implementation of the Lattice Boltzmann method on ARUZ, a massively parallel FPGA-based simulator located in Lodz, Poland. Compared to previous publications, a performance improvement of 46% has been achieved on D2Q9 lattice due to overlapping of communication with computation. The presented approach is suitable also for other cellular automata-based simulations. Extrapolation of results from the single ARUZ board suggests, that LBM simulation of 1080 × 480 lattice on 18 panels of ARUZ would reach the performance of 302 · 103 MLUPS (Million Lattice Updates per Second). This implementation has been compared to the classical supercomputer solution, giving much better power efficiency (3000 MLUPS/kW vs. 1280 MLUPS/kW, respectively).
EN
The paper presents the implementation results of D2Q9 Lattice Boltzmann method on ARUZ, a massively parallel FPGA-based simulator built in Lodz, Poland in 2015, optimized for execution of the Dynamic Lattice Liquid algorithm. The results of tests on a single ARUZ board indicate, that the LBM simulation of 864 × 384 lattice on 18 panels of ARUZ would reach the performance of 206 · 103 MLUPS (Million Lattice Updates per Second).
EN
The article shows the ecological and economic efficiency of biogas. Depending on the complexity of the tasks, the mathematical model could describe the research process with varying degrees of accuracy. Thus, numerical simulation should be combined with experimental research to compare and assess the validity of the model. Below is presented, a mathematical model of combustion of biogas. Then, based on the results of pilot studies to validate the mathematical model, a numerical simulation of the combustion of biogas. Process for the combustion of biogas is a complex process of their heterogeneous and homogenous combustion. The model of combustion process of extreme management not good can improve energy performance by maintaining the optimum cop value. Proved by simulation model of extreme management efficiency in changing signal assignments, the maintenance efficiency of the boiler is on a level with the specified accuracy.
PL
W artykule pokazano ekologiczną i ekonomiczną efektywność wykorzystania biogazu. W zależności od złożoności rozpatrywanych zadań, model matematyczny może opisywać badany proces z różnym stopniem dokładności. Tak więc modelowanie numeryczne należy połączyć z badaniami eksperymentalnymi żeby porównać i ocenić adekwatność modelu. Niżej będzie przedstawiony model matematyczny procesu spalania biogazu. Zatem, w oparciu o wyniki badań eksperymentalnych mających na celu sprawdzenie poprawności opracowanego modelu matematycznego, przeprowadzona zostanie numeryczna symulacja procesu spalania biogazu. Proces spalania biogazu jest złożonym procesem hetero- i homogenicznego spalania. Uzyskany model ekstremalnej regulacji procesu spalania w kotle pozwala poprawić wydajność energetyczną poprzez utrzymanie optymalnej wydajności. Potwierdzono zdolność roboczą opracowanego modelu symulacyjnego ekstremalnej regulacji przy zmianie sygnału odniesienia, czyli utrzymanie współczynnika sprawności kotła na tym samym poziomie z określoną dokładnością.
EN
Electrical capacitance tomography is an innovative method for visualization of industrial processes. One of its main advantages is it’s high time resolution that allows to the usage of ECT in systems with high volatility. In recent years there has been significant development of electrical capacitance tomography 3D, which however, has significantly reduced industrial it’s applications due to the complicated process of image reconstruction. The authors propose the use of multi-node, multi-GPU system to accelerate the process of image reconstruction in ECT 3D.
PL
Elektryczna tomografia pojemnościowa jest innowacyjną metodą wizualizacji procesów przemysłowych. Jedną z jej głównych zalet jest duża rozdzielczość czasowa pozwalająca na zastosowanie ECT w instalacjach o dużej zmienności. W ostatnich latach nastąpił znaczący rozwój elektrycznej tomografii pojemnościowej 3D, która jednakże ma znacznie ograniczone zastosowanie przemysłowe ze względu na skomplikowany proces rekonstrukcji obrazu. Autorzy artykułu proponują zastosowanie wielowęzłowego systemu Multi-GPU do przyspieszenia procesu rekonstrukcji obrazu w ECT 3D.
EN
Systems for distributed parameter measurements are very expensive solutions; however, they offer many possibilities in terms of real-time verification of machine status. Of course, ready, complex and easy-to-use measuring systems can be used, where the cost of such a solution may be prohibitive. In the case of research carried out under the experimental sphere of an object, e.g., using a research measurement system, it is possible to create a project for a system based mainly on the Arduino platform. As an example, the concept of a distributed measurement system will be presented, with the possibility for use on cranes and conveyors, i.e., on the most common machines on industrial plants.
EN
The paper presents a multi-objective optimization framework to the network resource allocation problem, where the aim is to maximize the bitrates of data generated by all agents executed in a distributed system environment. In the proposed approach, the utility functions of agents may have different forms, which allows a more realistic modeling of phenomena occurring in computer networks. A scalarizing approach has been applied to solve the optimization problem.
PL
We współczesnej kryptologii, struktury programowalne FPGA są często wykorzystywane w celu akceleracji obliczeń. W tym artykule, przedstawiono opis rozproszonego systemu służącego do generowania tęczowych tablic wykorzystywanych podczas ataku na funkcje skrótu. System ten ma architekturę typu klient-serwer. Rolę serwera pełni typowy komputer klasy PC, natomiast klientami są płyty deweloperskie wyposażone w układy reprogramowalne Altera Cyclone IV. System ten umożliwia, w porównaniu do rozwiązania czysto programowego, znacząco przyspieszyć wykonywane obliczenia.
EN
A Field Programmable Gate Array structures are often used to accelerate calculations in modern cryptology. In this article, the distributed system for generating rainbow tables is described. It can be used to attack the hash functions. This system architecture is based on the client-server model, where the main sever is a typical PC computer. Adequately, the network clients are development boards equipped with a programmable circuits Altera Cyclone IV. The system described here allows significantly speed up the calculations carried out, compared to a purely software solution.
PL
W artykule przedstawiono architekturę systemu obsługi statków powietrznych, mającego za zadanie gromadzenie i analizę danych na temat stanu struktury kadłuba oraz wspierającego odpowiednie działania w przypadku wykrytych uszkodzeń. Opisano komponenty systemu i przedstawiono jego funkcjonalność w kontekście wymagań bezpieczeństwa. Praca została wykonana w ramach międzynarodowego projektu ASTYANAX zrealizowanego pod egidą Europejskiej Agencji Obrony (European Defence Agency).
EN
This paper addresses a framework for the Structural Health Monitoring (SHM) system on an aerodyne (rotorcraft and airplane platforms) structure. Authors describe the architecture of SHM Distributed Maintenance System (SHMDMS), including the general idea, functionality of its components and safety analysis. The work has been done for the ASTYANAX project supported by European Defence Agency.
16
Content available remote System doboru i optymalizacji parametrów przekształtnika sieciowego AC-DC
PL
Artykuł prezentuje system doboru i optymalizacji parametrów przekształtnika sieciowego AC-DC dedykowanego dla układów rozproszonych. Proponowane rozwiązanie bazuje na metodach dyskretnej optymalizacji wielokryterialnej wykorzystujących algorytmy ewolucyjne i jest narzędziem wspierającym proces projektowania przekształtnika energoelektronicznego. W artykule przedstawiono założenia i działanie systemu, proces projektowania oraz optymalizacji parametrów przekształtnika realizowany przez opracowane środowisko optymalizacyjne.
EN
This paper presents system for design and optimization of the parameters of grid connected converter dedicated for distributed systems. Introduced solution is based on multi-objective discrete optimization and supports process of the AC-DC converter design. Paper presents foundations and basic system properties, design and optimization process and selected optimization results.
EN
In this paper the architecture of the software designed for management of position and identification data of floating and flying objects in Maritime areas controlled by Polish Border Guard is presented. The software was designed for managing information stored in a distributed system with two variants of the software, one for a mobile device installed on a vessel, an airplane or a car and second for a central server. The details of implementation of all functionalities of the MapServer in both, mobile and central, versions are briefly presented on the basis of information flow diagrams.
18
Content available Depth images filtering in distributed streaming
EN
In this paper, we propose a distributed system for point cloud processing and transferring them via computer network regarding to effectiveness-related requirements. We discuss the comparison of point cloud filters focusing on their usage for streaming optimization. For the filtering step of the stream pipeline processing we evaluate four filters: Voxel Grid, Radial Outliner Remover, Statistical Outlier Removal and Pass Through. For each of the filters we perform a series of tests for evaluating the impact on the point cloud size and transmitting frequency (analysed for various fps ratio). We present results of the optimization process used for point cloud consolidation in a distributed environment. We describe the processing of the point clouds before and after the transmission. Pre- and post-processing allow the user to send the cloud via network without any delays. The proposed pre-processing compression of the cloud and the post-processing reconstruction of it are focused on assuring that the end-user application obtains the cloud with a given precision.
EN
Many studies have demonstrated that agent-based distributed computing improves quality of distributed computations. In this paper, self-aware software agents are used to manage the distributed computations in order to improve effectiveness of investment decisions. A distributed time series forecasting approach based on the modified Group Method Data Handling (GMDH) method and agent oriented programing is proposed. The forecasted results computed by agents are used to make an investment decision. To assess the effectiveness of the system, we used the time series of EUR/USD currency pair stock prices. The empirical results with a real data set clearly suggest that the system can be deployed on the trading platform to automate process of the prediction of financial markets.
PL
Autor zebrał podstawową wiedzę dotyczącą sterowników PLC. W publikacji kolejno je definiuje, przedstawia ich rys historyczny, opisuje systemy DCS, systemy klasyfikacji oraz zwraca uwagę na przekaźniki programowalne.
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