Wyniki wyszukiwania dla: SHIP ROUTING OPTIMIZATION

• Preference-based evolutionary multi-objective optimization in ship weather routing

  Publikacja

  • J. Szłapczyńska
  • R. Szłapczyński

  - APPLIED SOFT COMPUTING - Rok 2019

  In evolutionary multi-objective optimization (EMO) the aim is to find a set of Pareto-optimal solutions. Such approach may be applied to multiple real-life problems, including weather routing (WR) of ships. The route should be optimal in terms of passage time, fuel consumption and safety of crew and cargo while taking into account dynamically changing weather conditions. Additionally it must not violate any navigational constraints...

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• Ship weather routing optimization with dynamic constraints based on reliable synchronous roll prediction

  Publikacja

  • P. Krata
  • J. Szłapczyńska

  - OCEAN ENGINEERING - Rok 2018

  Ship routing process taking into account weather conditions is a constrained multi-objective optimization problem and it should consider various optimization criteria and constraints. Formulation of a stability-related, dynamic route optimization constraint is presented in this paper. One of the key objectives of a cross ocean sailing is finding a compromise between ship safety and economics of operation. This compromise should...

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• Towards Improving Optimised Ship Weather Routing

  Publikacja

  • R. Vettor
  • J. Szłapczyńska
  • R. Szłapczyński
  • W. Tycholiz
  • C. G. Soares

  - Polish Maritime Research - Rok 2020

  The aim of the paper is to outline a project focusing on the development of a new type of ship weather routing solution with improved uncertainty handling, through better estimation of ship performance and responses to sea conditions. Ensemble forecasting is considered to take into account the uncertainty levels that are typical of operations in a stochastic environment. Increased accuracy of weather prediction is achieved through...

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• A distributed scheme for inter-domain routing optimization

  Publikacja

  • A. Tomaszewski
  • M. Pioro
  • M. Mycek

  - Rok 2007

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• REVIEW OF WEATHER FORECAST SERVICES FOR SHIP ROUTING PURPOSES

  Publikacja

  • M. Życzkowski
  • J. Szłapczyńska
  • R. Szłapczyński

  - Polish Maritime Research - Rok 2019

  Weather data is nowadays used in a variety of navigational and ocean engineering research problems: from the obvious ones like voyage planning and routing of sea-going vessels, through the analysis of stability-related phenomena, to detailed modelling of ships’ manoeuvrability for collision avoidance purposes. Apart from that, weather forecasts are essential for passenger cruises and fishing vessels that want to avoid the risk...

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• Cooperative multi-provider routing optimization and income distribution

  Publikacja

  • M. Mycek
  • S. Secci
  • M. Pioro
  • J. Rougier
  • A. Tomaszewski
  • A. Pattavina

  - Rok 2009

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• Ship weather routing featuring w-MOEA/D and uncertainty handling

  Publikacja

  • R. Szłapczyński
  • J. Szłapczyńska
  • R. Vettor

  - APPLIED SOFT COMPUTING - Rok 2023

  The paper presents a new version of evolutionary multi-objective weather routing (WR) for ships taking into account uncertainties of weather forecasts in route optimization. The method applies authors’ w-MOEA/D algorithm: MOEA/D framework incorporating Decision Maker’s (DM) preferences by means of w-dominance relation. Owing to this, DM preferences are taken into account throughout optimization, allowing the process to focus on...

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• A distributed scheme for optimization of interdomain routing between collaborating domains

  Publikacja

  • A. Tomaszewski
  • M. Pióro
  • M. Mycek

  - Annals of Telecommunications-Annales des Telecommunications - Rok 2008

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• An efficient approach to optimization of semi‐stable routing in multicommodity flow networks

  Publikacja

  • A. Tomaszewski
  • M. Pióro
  • D. Sanvito
  • I. Filippini
  • A. Capone

  - NETWORKS - Rok 2021

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• ADOPTED ISOCHRONE METHOD IMPROVING SHIP SAFETY IN WEATHER ROUTING WITH EVOLUTIONARY APPROACH

  Publikacja

  • J. Szłapczyńska
  • R. Śmierzchalski

  - International Journal of Reliability Quality & Safety Engineering - Rok 2007

  The paper is focused on adaptation of an isochrone method necessary for application to a weather routing system with evolutionary approach. Authors propose an adaptation of the isochrone method with area partitioning assuring that the route found by the adopted method would not cross land. In result, when applied to a weather routing system with evolutionary approach, this proposal facilitates creation of initial population, resulting...

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• A new method of ship routing on raster grids, with turn penalties and collision avoidance

  Publikacja

  • R. Szłapczyński

  - JOURNAL OF NAVIGATION - Rok 2006

  Artykuł przedstawia nowy algorytm znajdowania optymalnych tras na siatkach rastrowych. Szczegółowo opisano zastosowane struktury danych, dzięki którym algorytm ma liniową złożoność obliczeniową. Na podstawie algorytmu opracowano metodę wyznaczania tras dla statków, uwzględniającą kwestie unikania kolizji z innymi statkami i przeszkodami nawigacyjnymi.Przedstawiono dwa warianty metody, dedykowane odpowiednio systemom pokładowym...

• Optimization of transformation of measurements of ship hull blocks

  Publikacja

  • A. Kniat

  - Polish Maritime Research - Rok 2009

  Artykuł przedstawia analizę wyników pomiarów wykonanych na blokach kadłuba statku, aby ocenić ich przydatność montażową podczas ostatniej fazy montażu w suchym doku lub na pochylni. Analiza realizowana jest w dwóch krokach. Najpierw sprawdza się, czy bloki zostały wykonane z zachowaniem wymaganych tolerancji, a następnie czy istnieje możliwość połączenia ze sobą dwóch sąsiednich bloków. Ponieważ każdy blok jest mierzony w innym...

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• Optimization of quadrilateral mesh for ship hull modelling

  Publikacja

  • A. Kniat

  - Measurement Automation Monitoring - Rok 2011

  Artykuł przedstawia metodę poprawy jakości czworokątnej siatki elementów skończonych, które najlepiej nadają się do modelowania kadłuba statku dla potrzeb analizy MES. W metodzie zakłada się poprawną topologię siatki i stosuje gradient funkcji celu do poszukiwania optymalnego rozwiązania. Funkcja celu może być dowolną funkcją, opisująca jakość elementu (metryka), odpowiednią dla wymagań metody elementów skończonych. W artykule...

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• Weather Hazard Avoidance in Modeling Safety of Motor-Driven Ship for Multicriteria Weather Routing

  Publikacja

  • P. Krata
  • J. Szłapczyńska

  - TransNav - The International Journal on Marine Navigation and Safety of Sea Transportation - Rok 2012

  Weather routing methods find the most suitable ocean?s route for a vessel, taking into account changeable weather conditions and navigational constraints. In the multicriteria approach based on the evolutionary SPEA algorithm one is able to consider a few constrained criteria simultaneously. The approach applied for a ship with hybrid propulsions has already been presented by one of the authors on previous TransNav?2009. This time...

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• Optimization of The Shortest-Path Routing with Equal-Cost Multi-Path Load Balancing

  Publikacja

  • M. Dzida
  • M. Zagozdzon
  • M. Pioro
  • A. Tomaszewski
  • A. Tomaszewski

  - Rok 2006

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• Packet routing and frame length optimization in wireless mesh networks with multicast communications

  Publikacja

  • A. Tomaszewski
  • M. Pioro

  - Rok 2016

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• Distributed Inter-Domain Link Capacity Optimization for Inter-Domain IP/MPLS Routing

  Publikacja

  • A. Tomaszewski
  • M. Pioro
  • M. Mycek

  - Rok 2007

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• Collision‐Aware Routing Using Multi‐Objective Seagull Optimization Algorithm for WSN‐Based IoT

  Publikacja

  • P. Jagannathan
  • S. Gurumoorthy
  • A. Stateczny
  • P. B. Divakarachar
  • J. Sengupta

  - SENSORS - Rok 2021

  In recent trends, wireless sensor networks (WSNs) have become popular because of their cost, simple structure, reliability, and developments in the communication field. The Internet of Things (IoT) refers to the interconnection of everyday objects and sharing of information through the Internet. Congestion in networks leads to transmission delays and packet loss and causes wastage of time and energy on recovery. The routing protocols...

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• Optimization Model to Manage Ship Fuel Consumption and Navigation Time

  Publikacja

  • K. Rudzki
  • P. Gomulka
  • A. Hoang
  • P. Gomułka

  - Polish Maritime Research - Rok 2022

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• Multipath routing for quality of service differentiation and network capacity optimization in broadband low-earth orbit systems

  Publikacja

  • J. Jurski
  • J. Woźniak

  - Rok 2009

  This paper shows the importance of employing multiple different paths for routing in Inter-Satellite Link (ISL) networks in broadband Low-Earth Orbit (LEO) satellite systems. A theoretical analysis is presented and a routing concept is proposed to demonstrate three facts that make multipath routing especially important in broadband LEO networks: (1) differences in the propagation delays have a much greater impact on end-to-end...

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• Sea Captains’ Views on Automated Ship Route Optimization in Ice-covered Waters

  Publikacja

  • V. Lehtola
  • J. Montewka
  • J. Salokannel

  - JOURNAL OF NAVIGATION - Rok 2020

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• Corrosion degradation monitoring of ship stiffened plates using guided wave phase velocity and constrained convex optimization method

  Publikacja

  • B. Zima
  • K. Wołoszyk
  • Y. Garbatov

  - OCEAN ENGINEERING - Rok 2022

  The study presents an experimental investigation on the corrosion degradation level assessment using nondestructive wave-based methods. The degradation level of ship structural elements has been assessed in two different ways. The first one is based on the spectral decomposition and zero-crossing incorporated reconstruction of the dispersion curve approach of the antisymmetric Lamb wave mode and the best matching of the theoretical...

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• Multicriteria Evolutionary Weather Routing Algorithm in Practice

  Publikacja

  • J. Szłapczyńska

  - TransNav - The International Journal on Marine Navigation and Safety of Sea Transportation - Rok 2013

  The Multicriteria Evolutionary Weather Routing Algorithm (MEWRA) has already been introduced by the author on earlier TransNav 2009 and 2011 conferences with a focus on theoretical application to a hybrid-propulsion or motor-driven ship. This paper addresses the topic of possible practical weather routing applications of MEWRA. In the paper some practical advantages of utilizing Pareto front as a result of multicriteria optimization...

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• Joanna Szłapczyńska dr hab. inż.

  Osoby

  Katedra Architektury Systemów Komputerowych

• Multi-objective Weather Routing with Customised Criteria and Constraints

  Publikacja

  • J. Szłapczyńska

  - JOURNAL OF NAVIGATION - Rok 2015

  The paper presents a weather routing algorithm utilising a multi-objective optimisation with constraints, namely the Multi-objective Evolutionary Weather Routing Algorithm (MEWRA). In the proposed approach weather route recommendations can be made simultaneously e.g. for passage time, fuel consumption and safety of passage by means of Pareto optimisation. The sets of criteria and constraints in the optimisation process are fully...

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• Natalia Stawicka-Morawska dr inż.

  Osoby

  Instytut Mechaniki i Konstrukcji Maszyn

  Mgr inż. Natalia Stawicka-Morawska pracuje na Politechnice Gdańskiej od października 2017 r. na stanowisku Asystenta, na Wydziale Inżynierii Mechanicznej i Okrętownictwa (poprzednio: Wydziale Mechanicznym), w Instytucie Mechaniki i Konstrukcji Maszyn (poprzednio: Katedrze Mechaniki i Mechatroniki).Prowadzona przez nią działalność naukowa dotyczy dziedziny nauk technicznych w dyscyplinie naukowej budowa i eksploatacja maszyn. Główną...

• Weather Routing System Architecture Using Onboard Data Collection and Route Optimisation

  Publikacja

  • J. Szłapczyńska
  • R. Vettor
  • R. Szłapczyński
  • M. Łącki
  • M. Życzkowski
  • M. A. Hinostroza
  • F. P. Santos
  • W. Tycholiz
  • C. G. Soares

  - Polish Maritime Research - Rok 2022

  This paper describes the architecture of a weather routing system consisting of two key elements: onboard monitoring and route optimiser sub-systems. The former is responsible for collecting various onboard measurements, such as current ship position or ship motion variables. These data, when gathered and processed, are then used for fine-tuning a ship model. The model, together with weather forecasts, is utilised by a multi-objective...

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• Waldemar Korłub dr inż.

  Osoby

  Waldemar Korłub uzyskał tytuł inżyniera w 2011 roku, tytuł magistra w 2012 roku oraz stopień doktora w dyscyplinie informatyki w 2017 roku na Wydziale Elektroniki Telekomunikacji i Informatyki Politechniki Gdańskiej. Jego zainteresowania naukowe obejmują: systemy rozproszone ze szczególnym uwzględnieniem systemów typu grid i chmur obliczeniowych, systemy autonomiczne zdolne do samodzielnej optymalizacji, zarządzania zasobami, ochrony...

• PODEJŚCIE WARIANTOWE WE WSTĘPNYM PROJEKTOWANIU STATKÓW Variant methods approach to the preliminary ship design.

  Publikacja

  • A. Karczewski
  • J. Kozak

  - Mechanik - Rok 2017

  Klasyczna metoda projektowania okrętów jest metodą iteracyjną, bazującą na zgromadzonym doświadczeniu ze statków już zbu-dowanych. Natomiast w przypadku statku całkowicie nowego typu, bez „posagu wcześniejszych doświadczeń”, projektowanie polega na opracowaniu szeregu równoległych, wariantowych rozwiązań z wykorzystaniem optymalizacji. Artykuł wskazuje wybrane metody projektowe wykorzystujące optymalizacje, używane we wstępnym...

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• The Development of a Combined Method to Quickly Assess Ship Speed and Fuel Consumption at Different Powertrain Load and Sea Conditions

  Publikacja

  • P. Krata
  • A. Kniat
  • R. Vettor
  • H. Krata
  • C. G. Soares

  - TransNav - The International Journal on Marine Navigation and Safety of Sea Transportation - Rok 2021

  Decision support systems (DSS) recently have been increasingly in use during ships operation. They require realistic input data regarding different aspects of navigation. To address the optimal weather routing of a ship, which is one of the most promising field of DSS application, it is necessary to accurately predict an actually attainable speed of a ship and corresponding fuel consumption at given loading conditions and predicted...

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• Zdzisław Kowalczuk prof. dr hab. inż.

  Osoby

  Katedra Systemów Decyzyjnych i Robotyki

  W 1978 ukończył studia w zakresie automatyki i informatyki na Wydziale Elektroniki Politechniki Gdańskiej, następnie rozpoczął pracę na macierzystej uczelni. W 1986 obronił pracę doktorską, w 1993 habilitował się na Politechnice Śląskiej na podstawie pracy Dyskretne modele w projektowaniu układów sterowania. W 1996 mianowany profesorem nadzwyczajnym, w 2003 otrzymał tytuł profesora nauk technicznych. W 2006 założył i od tego czasu...

• Efektywna metoda wyznaczania trasy statków żaglowych

  Publikacja

  • M. Życzkowski

  - Rok 2016

  Zaproponowano metodę wyznaczania suboptymalnej trasy statków żaglowych poruszających się w ograniczonym akwenie morskim. Uwzględniono przy tym dynamikę tego środowiska w tym warunki pogodowe oraz charakterystyki prędkościowe statków żaglowych. Jako kryterium optymalizacji przyjęto czas żeglugi T oraz liczbę wykonanych manewrów ω. Zaprojektowano heurystyczny algorytm oraz odpowiednią aplikację wyznaczania trasy dla ustalonych punktów...

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• Jan Sierzputowski mgr inż.

  Osoby

  Jan Sierzputowski is a student at the Doctoral School of the Gdańsk University of Technology. His main interests are designing sailing yachts, improving the design process and human-centred design. In his professional work, he deals with sails, masts, rigging, deck equipment and its optimization for the end user. He graduated from engineering and master's studies at the Gdańsk University of Technology at the Faculty of Shipbuilding...

• Taxonomy of Schemes for Resilient Routing

  Publikacja

  • I. Ganchev
  • J. Rak
  • T. Cinkler
  • M. O’droma

  - Rok 2020

  This chapter provides a taxonomy of schemes for resilient routing followed by a discussion of their application to contemporary architectures of communication networks. In particular, a general classification of schemes for resilient routing is first presented followed by a description of the reference schemes for IP networks. The chapter in its later part focuses on the representative techniques of resilient routing for a multi-domain...

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• Piotr Gomułka mgr inż.

  Osoby

  Two-Criteria Optimization Model To Manage Ship Fuel Consumption and Navigation Time

• Jakub Montewka prof. dr hab. inż.

  Osoby

  Zakład Hydromechaniki i Projektowania Okrętu, Instytut Budowy Okrętów

  Jakub Montewka is an associate professor at Gdańsk University of Technology in Poland and visiting processor at Aalto University in Espoo, Finland and Wuhan University of Technology in China. Jakub is researching in the field of maritime traffic risk and safety. His primary interests lie in the risk assessment of maritime transportation, quantification of safety of maritime navigation, route optimization for ships in ice-covered...

• Multi-objective weather routing of sailing vessels

  Publikacja

  • M. Życzkowski
  • R. Szłapczyński

  - Polish Maritime Research - Rok 2017

  The paper presents a multi-objective deterministic method of weather routing for sailing vessels. Depending on a particular purpose of sailboat weather routing, the presented method makes it possible to customize the criteria and constraints so as to fit a particular user’s needs. Apart from a typical shortest time criterion, safety and comfort can also be taken into account. Additionally, the method supports dynamic weather data:...

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• Resilient Routing in Communication Networks

  Publikacja

  • J. Rak

  - Rok 2015

  This important text/reference addresses the latest issues in end-to-end resilient routing in communication networks. The work highlights the main causes of failures of network nodes and links, and presents an overview of resilient routing mechanisms, covering issues related to the Future Internet (FI), wireless mesh networks (WMNs), and vehicular ad-hoc networks (VANETs). For each of these network architectures, a selection of...

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• Disaster-Resilient Routing Schemes for Regional Failures

  Publikacja

  • T. Gomes
  • D. Santos
  • R. Girão-Silva
  • L. Martins
  • B. Nedic
  • M. Gunkel
  • B. Vass
  • J. Tapolcai
  • J. Rak

  - Rok 2020

  Large-scale natural disasters can have a profound effect on the telecommunication services in the affected geographical area. Hence, it is important to develop routing approaches that may help in circumventing damaged regional areas of a network. This prompted the development of geographically diverse routing schemes and also of disaster-risk aware routing schemes. A minimum-cost geodiverse routing, where a minimum geographical...

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• Simulation model for evaluation of QoS routing algorithm in large packet networks

  Publikacja

  • M. Czarkowski
  • S. Kaczmarek
  • S. Stępnicki

  - Zeszyty Naukowe Wydziału ETI Politechniki Gdańskiej. Technologie Informacyjne - Rok 2010

  The variety of traffic transferred via current telecommunication networks includes also voice, which should meet quality requirements. One of mechanisms, which can support QoS in current packet networks, is routing. There exist many routing proposals which should introduce the QoS into the network but practically they don't. Following paper presents the realization of simulation model for evaluation of a new routing algorithm DUMBRA...

• Minimizing Greenhouse Gas Emissions From Ships Using a Pareto Multi-Objective Optimization Approach

  Publikacja

  • Z. Domachowski

  - Polish Maritime Research - Rok 2021

  To confront climate change, decarbonization strategies must change the global economy. According to statements made as part of the European Green Deal, maritime transport should also become drastically less polluting. As a result, the price of transport must reflect the impact it has on the environment and on health. In such a framework, the purpose of this paper is to suggest a novel method for minimizing emissions...

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• Routing equal-size messages on a slotted ring

  Publikacja

  • D. Dereniowski
  • W. Kubiak

  - JOURNAL OF SCHEDULING - Rok 2012

  Analizujemy problem routingu wiadomości w sieci slotted ring, biorąc pod uwagę dwa kryteria optymalizacyjne: długość uszeregowania oraz liczbę 'cykli' pracy sieci. Optymalny routing dla wiadomości o rozmiarze k jest silnie NP-trudny, natomiast dla k=q, gdzie q jest rozmiarem sieci, można obliczyć w czsie O(n^2log n) dla pierwszego kryterium. Podajemy również algorytm o czasie działania O(nlog n) oraz o stałym współczynniku dobroci....

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• Przemysław Krata dr hab. inż.

  Osoby

  Instytut Budowy Okrętów

• Traffic Type Influence on Performance of OSPF QoS Routing

  Publikacja

  • M. Czarkowski
  • S. Kaczmarek
  • M. Wolff

  - Rok 2012

  Feasibility studies with QoS routing proved that the network traffic type has influence on routing performance. In this work influence of self-similar traffic for network with DiffServ architecture and OSPF QoS routing has been verified. Analysis has been done for three traffic classes. Multiplexed ON-OFF model was used for self-similar traffic generation. Comparison of simulation results were presented using both relative and...

• Simulation model for evaluation of QOS dynamic routing

  Publikacja

  • M. Czarkowski
  • S. Kaczmarek

  - Rok 2009

  Current informational networks use a large variety of technologies to support data exchange. Most of them are focused on IP protocol and include mechanisms which by definition should supply demanded QoS. One of those mechanisms is efficient path calculation - routing. Traffic offered to the network can change very rapidly in short term. Routing should support such traffic changes and all the time calculate valid paths in terms...

• Traffic Type Influence on Performance of OSPF QoS Routing

  Publikacja

  • M. Czarkowski
  • S. Kaczmarek
  • M. Wolff

  - Journal of Telecommunications and Information Technology - Rok 2013

  Feasibility studies with QoS routing proved that the network traffic type has influence on routing performance. In this work influence of self-similar traffic for network with DiffServ architecture and OSPF QoS routing has been verified. Analysis has been done for three traffic classes. Multiplexed On-Off model was used for self-similar traffic generation. Comparison of simulation results was presented using both relative and non-relative...

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• What entrepreneurs think about tax optimization?

  Dane Badawcze

  open access

  • P. Kasprzak
  • P. Dębniak

  The study conducted on a group of 259 entrepreneurs concerned the behavioral attitudes of business owners regarding their opinion on tax optimization. From the study we will learn, among others, how tax optimization is defined according to entrepreneurs, their attitude towards it, as well as what optimization actions they have taken so far.

• Clonal selection algorithm for vehicle routing

  Publikacja

  • J. Dąbrowski

  - Rok 2008

  Over the years several successful computing techniques have been inspired by biological mechanisms. Studies of the mechanisms that allow the immune systems of vertebratesto adapt and learn have resulted in a class of algorithms called artificial immune systems. Clonal selection is a process that allows lymphocytes to launch a quick response to known pathogens and to adapt to new, previously unencountered ones. This paper presents...

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• Dynamic unattended measurement based routing algorithm for diffServ architecture

  Publikacja

  • M. Czarkowski
  • S. Kaczmarek

  - Rok 2010

  Dynamic routing is very important in terms of assuring QoS in today's packet networks especially for streaming and elastic services. Existing solutions dedicated to dynamic routing are often too complicated and seem to be not usable in real time traffic scenarios where transferred traffic may vary significantly. This was the main reason for research and new routing mechanism proposal which should apply to today's packet networks....

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• Hybrid DUMBRA: an efficient QoS routing algorithm for networks with DiffServ architecture

  Publikacja

  • M. Czarkowski
  • S. Kaczmarek

  - Rok 2011

  Dynamic routing is very important issue of current packet networks. It may support the QoS and help utilize available network resources. Unfortunately current routing mechanisms are not sufficient to fully support QoS. Although many research has been done in this area no generic QoS routing algorithm has been proposed that could be used across all network structures. Existing QoS routing algorithms are either dedicated to limited...