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Wyniki wyszukiwania dla: Actor-Critic Network

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Wyniki wyszukiwania dla: Actor-Critic Network

  • Taxonomy of Schemes for Resilient Routing

    Publikacja

    - 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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  • A method of self-testing of analog circuits based on fully differential op-amps with theTCBF classifier

    Publikacja

    - Rok 2015

    A new approach of self-testing of analog circuits based on fully differential op-amps of mixed-signal systems controlled by microcontrollers is presented. It consists of a measurement procedure and a fault diagnosis procedure. We measure voltage samples of a time response of a tested circuit on a stimulation of a unit step function given at the common-mode reference voltage input of the op-amp. The fault detection and fault localization...

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  • Evolution of chemotaxis in single-cell artificial organisms

    Publikacja

    The model of a liquid two-dimensional environment, which is based on physics of diffusion, allows us to simulate the diffusion of morphogenes. Artificial organisms move using a chemotaxis reacting to concentration difference. Organisms are controlled by a gene regulatory network coded in a linear genome and reproduce by division. We made a lot of experiments presenting organisms’ behaviour in various environment conditions. We...

  • Wireless Systems of Threats Monitoring

    The concept of wireless system of threats monitoring with self-organizing network of multipurpose data transfer nodes are presented. Two practical applications of this system are also presented. The first of these is the Global Wireless Monitoring System for Containers, and the second is the Mobile Monitoring System for Gas Air Pollution Measurements. Presented practical applications of the wireless threats monitoring system is...

  • Annotating Words Using WordNet Semantic Glosses

    Publikacja

    - Rok 2012

    An approach to the word sense disambiguation (WSD) relaying onthe WordNet synsets is proposed. The method uses semantically tagged glosses to perform a process similar to the spreading activation in semantic network, creating ranking of the most probable meanings for word annotation. Preliminary evaluation shows quite promising results. Comparison with the state-of-theart WSD methods indicates that the use of WordNet relations...

  • Underground Water Level Prediction in Remote Sensing Images Using Improved Hydro Index Value with Ensemble Classifier

    Publikacja
    • A. Stateczny
    • S. C. Narahari
    • P. Vurubindi
    • N. S. Guptha
    • K. Srinivas

    - Remote Sensing - Rok 2023

    The economic sustainability of aquifers across the world relies on accurate and rapid estimates of groundwater storage changes, but this becomes difficult due to the absence of insitu groundwater surveys in most areas. By closing the water balance, hydrologic remote sensing measures offer a possible method for quantifying changes in groundwater storage. However, it is uncertain to what extent remote sensing data can provide an...

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  • Badanie i analiza efektywności alokacji strumieni danych w heterogenicznej sieci WBAN

    Publikacja

    - Rok 2017

    W niniejszej dysertacji doktorskiej poddano dyskusji efektywność alokacji strumieni danych w heterogenicznej radiowej sieci WBAN (Wireless Body Area Networks). Biorąc pod uwagę dynamiczny rozwój nowoczesnych sieci radiokomunikacyjnych piątej generacji (5G), którego część stanowią radiowe sieci działające w obrębie ciała człowieka, bardzo ważnym aspektem są metody maksymalizujące wykorzystanie dostępnych zasobów czasowo –częstotliwościowych...

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  • Detection of the First Component of the Received LTE Signal in the OTDoA Method

    In a modern world there is a growing demand for localization services of various kinds. Position estimation can be realized via cellular networks, especially in the currently widely deployed LTE (Long Term Evolution) networks. However, it is not an easy task in harsh propagation conditions which often occur in dense urban environments. Recently, time-methods of terminal localization within the network have been the focus of attention,...

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  • An attempt to mechanistically explain the viscoelastic behavior of transparent epoxy/starch-modified ZnO nanocomposite coatings

    Publikacja
    • M. Ganjaee
    • H. Vahabi
    • X. Gabrion
    • P. Laheurte
    • P. Zarrintaj
    • K. Formela
    • M. Saeb

    - PROGRESS IN ORGANIC COATINGS - Rok 2018

    The effects of bare and starch-modified ZnO (ZnO-St) nanoparticles on viscoelastic and mechanical properties are studied by dynamic mechanical and tensile analyses. Transparent epoxy-based nanocomposite films are prepared by incorporating bare or starch-modified ZnO particles into the epoxy matrix. The results demonstrated that ZnO particles hindered the curing reactions and hence the final properties of the cured epoxy. As a result,...

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  • Hyaluronan-Chondroitin Sulfate Anomalous Crosslinking Due to Temperature Changes

    Publikacja
    • T. Andrysiak
    • P. Bełdowski
    • J. Siódmiak
    • P. Weber
    • D. Ledziński

    - Polymers - Rok 2018

    Glycosaminoglycans are a wide class of biopolymers showing great lubricating properties due to their structure and high affinity to water. Two of them, hyaluronic acid and chondroitin sulfate, play an important role in articular cartilage lubrication. In this work, we present results of the all-atom molecular dynamics simulations of both molecules placed in water-based solution. To mimic changes of the physiological conditions,...

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  • Investigation on stability of mountainous EUPOS sites’ coordinates

    Publikacja

    - Acta Geodynamica et Geomaterialia - Rok 2010

    The paper concerns analysis of solutions obtained during common processing of data from GNSS permanent stations situated on mountainous terrain: the Western Carpathians, the Sudetes Mountains and adjacent areas. As the outcome daily and weekly solutions (ellipsoidal coordinates) of forty Polish, Czech, Slovak, Ukrainian and German sites were obtained. Weekly solutions were used to determine velocity field and vertical movements,...

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  • Automated hearing loss type classification based on pure tone audiometry data

    Publikacja
    • M. Kassjański
    • M. Kulawiak
    • T. Przewoźny
    • D. Tretiakow
    • J. Kuryłowicz
    • A. Molisz
    • K. Koźmiński
    • A. Kwaśniewska
    • P. Mierzwińska-Dolny
    • M. Grono

    - Scientific Reports - Rok 2024

    Hearing problems are commonly diagnosed with the use of tonal audiometry, which measures a patient’s hearing threshold in both air and bone conduction at various frequencies. Results of audiometry tests, usually represented graphically in the form of an audiogram, need to be interpreted by a professional audiologist in order to determine the exact type of hearing loss and administer proper treatment. However, the small number of...

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  • Automatic singing quality recognition employing artificial neural networks

    Publikacja

    Celem artykułu jest udowodnienie możliwości automatycznej oceny jakości technicznej głosów śpiewaczych. Pokrótce zaprezentowano w nim stworzoną bazę danych głosów śpiewaczych oraz zaimplementowane parametry. Przy pomocy sztucznych sieci neuronowych zaprojektowano system decyzyjny, który oceniono w pięciostopniowej skali jakość techniczną głosu. Przy pomocy metod statystycznych udowodniono, że wyniki generowane przez ten system...

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  • Quality Expectations of Mobile Subscribers

    Mobile systems, by nature, have finite resources. Radio spectrum is limited, expensive and shared between many users and services. Mobile broadband networks must support multiple applications of voice, video and data on a single IP-based infrastructure. These converged services each have unique traffic holding and quality requirements. A positive user experience must be obtained through efficient partitioning of the available wireless...

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  • Entropic Measures of Complexity of Short-Term Dynamics of Nocturnal Heartbeats in an Aging Population

    Publikacja
    • D. Makowiec
    • A. Kaczkowska
    • D. Wejer
    • M. Żarczyńska-Buchowiecka
    • Z. R. Struzik

    - ENTROPY - Rok 2015

    Two entropy-based approaches are investigated to study patterns describing differences in time intervals between consecutive heartbeats. The first method explores matrices arising from networks of transitions constructed following events represented by a time series. The second method considers distributions of ordinal patterns of length three, whereby patterns with repeated values are counted as different patterns. Both methods provide...

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  • Creating dynamic maps of noise threat using pl-grid infrastructure; materiały konferencyjne

    This paper presents functionality and operation results of the system for creating dynamic maps of noise thread with the use of the PL-Grid infrastructure integrated with distributed sensors network for measuring, modeling and rendering noise level distribution. The work presented provides a demonstration of the services being prepared within the PLGrid Plus project. Specific computational environments, so called domain grids,...

  • Effects of UV light irradiation on fluctuation enhanced gas sensing by carbon nanotube networks

    Publikacja

    - SENSORS AND ACTUATORS B-CHEMICAL - Rok 2022

    The exceptionally large active surface-to-volume ratio of carbon nanotubes makes it an appealing candidate for gas sensing applications. Here, we studied the DC and low-frequency noise characteristics of a randomly oriented network of carbon nanotubes under NO2 gas atmosphere at two different wavelengths of the UV light-emitting diodes. The UV irradiation allowed to sense lower concentrations of NO2 (at least 1 ppm) compared to...

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  • TDOA Navigation Using CDMA2000 Signals – Experimental Results

    Publikacja

    - Rok 2014

    This paper presents results of an experiments on the possibility to estimate position of a CDMA2000 receiver on the basis of TDOA measurements. The hardware and software structure of a navigation receiver used during investigation is briefly described with focus on drawbacks and limitations. The main part of this paper contains basic information about CDMA2000 network in northern Poland, which signals were recorded during tests...

  • A diplexer design method using an augmented channel filter approach

    Publikacja

    Continuous development in RFID andmicrocontrollers technologies gives new possibilities to createsystems that are able to integrate a lot of sensors based ondifferent technologies. This integration brings us closer to realizethe Ubiquitous Network Society vision. However, many problemsmust be addressed before we will benefit from such systems. Inthis paper we describe concept of integrating RFID technologywith other sensors technologies...

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  • Advanced surveillance and operational communication system employing mobile terminals

    Publikacja

    Distributed surveillance and operational communications system based on XMPP protocol is presented. Its architecture and assumptions leading to the depicted design are shown. Features of XMPP protocol are portrayed with the emphasis on those most important in the context of the application. Real-time multimedia transmission with the use of Jingle/XMPP extension is discussed. The use of PDA-class computers as mobile terminals is...

  • Mechanizmy bezpieczeństwa w strefie C systemu netBaltic

    W artykule zaprezentowano rozwiązania zaimplementowane do zabezpieczania komunikacji w warunkach sporadycznej i nieciągłej łączności (Delay Tolerant Networking – DTN) w systemie netBaltic - charakterystycznej dla strefy C tego systemu. Ze względu na dużą różnorodność rozważanych mechanizmów komunikacyjnych, architektura bezpieczeństwa całego systemu została podzielona na kilka elementów – infrastrukturę klucza publicznego (PKI),...

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  • ANALIZA PRZEPUSTOWOŚCI WYBRANEGO UKŁADU TOROWEGO W PRZESTRZENI CZĘŚCIOWO – UPORZĄDKOWANEJ

    Publikacja

    Na sieci kolejowej istotny wpływ na płynność ruchu mają odpowiednio usytuowane odcinki odstępowe. Z podobną sytuacją mamy do czynienia przy modernizacji stacji kolejowych i tworzeniu nowych rozwiązań, w których należy uwzględnić prognozy rozwoju ruchu na danym elemencie sieci kolejowej. Jednak w przypadku stacji sytuacja staje się dużo bardziej skomplikowana i kosztowna, gdyż poprawa przepustowości wymaga istotnych zmian organizacyjnych...

  • Statistical significance of displacements in heterogeneous control networks

    Publikacja

    - Geodesy and Cartography - Rok 2013

    This paper proposes a modification of the classical process for evaluating the statistical significance of displacements in the case of heterogeneous (e.g. linear-angular) control networks established to deformation measurements and analysis. The basis for the proposed solution is the idea of local variance factors. The theoretical discussion was complemented with an example of its application on a simulated horizontal control...

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  • Computer-aided analysis of resonance risk in power system with Static Var Compensators

    Static Var Compensators operation in a power system may significantly improve voltage profiles in nodes and the reactive power balance, as well as ensure greater system stability in emergency conditions. However these devices may be a cause of a resonance in the system. The aim of this paper is to call attention to the need to include resonance phenomena in a compensator’s location evaluation process. The analysis performed in...

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  • Determination of chlorine concentration using single temperature modulated semiconductor gas sensor

    A periodic temperature modulation using sinusoidal heater voltage was applied to a commercial SnO2 semiconductor gas sensor. Resulting resistance response of the sensor was analyzed using a feature extraction method based on Fast Fourier Transformation (FFT). The amplitudes of the higher harmonics of the FFT from the dynamic nonlinear responses of measured gas were further utilized as an input for Artificial Neural...

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  • Harmonics produced by traction substations – computer modelling and experimental verification

    Voltage and current harmonics have a detrimental effect on the components of a power system. Current harmonics may result in the overload and damage to power transformers. Voltage harmonics may result in, for example, damage to capacitor banks used to compensate reactive power. Devices which contribute to both current and voltage distortion include traction rectifiers. This paper presents results of the computer investigation of...

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  • Solutions of inverter systems in Shore-to-Ship Power supply systems

    Publikacja

    - Rok 2015

    The article presents a clearly formulated need for installing S2SP (Shore to Ship Power) systems, in particular Medium Voltage (MV) systems, along with certain solutions of modern inverter systems used in those systems. Requirements and basic configurations of S2SP systems are discussed, focusing in particular on capabilities of the S2SP system with DC distribution busbar. Moreover, on the background of the executing assumptions...

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  • Comparison of centralized and decentralized preemption in MPLS networks

    Publikacja

    - Rok 2007

    Preemption is one of the crucial parts of the traffic engineering in MPLS networks. It enables allocation of high-priority paths even if the bandwidth on the preferred route is exhausted. This is achieved by removing previously allocated low-priority traffic, so as enough free bandwidth becomes available. The preemption can be performed either as a centralized or a decentralized process. In this article we discuss the differences...

  • Correlated Particle Motion and THz Spectral Response of Supercritical Water

    Publikacja

    - PHYSICAL REVIEW LETTERS - Rok 2016

    Molecular dynamics simulations of supercritical water reveal distinctly different distance-dependent modulations of dipolar response and correlations in particle motion compared to ambient conditions. The strongly perturbed H-bond network of water at supercritical conditions allows for considerable translationaland rotational freedom of individual molecules. These changes give rise to substantially different infrared spectra and...

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  • Topology Discovery of Hierarchical Ethernet LANs without SNMP support

    Publikacja

    - Rok 2015

    This paper presents an algorithm that allows for discovery of layer-2 hierarchical Ethernet network topology using agents running on selected end nodes. No SNMP, MIB, hardware, firmware, or operating system-level software modification is required. The method is based on transmission of customized Ethernet frames among installed software agents. It can be used to discover the topology of LAN or one VLAN segment as long as no MAC...

  • Improving web user experience with caching user interface

    Publikacja

    - Rok 2013

    Often, Web technologies are used to operate or to configure network-enabled equipment, to configure and administer modular applications, or as teaching environments. The comfort of human work requires a similar response time in these applications as in the Internet. To improve response time, various forms of caching at different levels are employed. To improve the user experience in regard to response time when performing specific...

  • PROJEKT TECHNICZNY BEZPRZEWODOWEGO SYSTEMU MONITOROWANIA OSOBY STARSZEJ

    Publikacja

    - Rok 2017

    Rozwój technologii dążący do miniaturyzacji oraz coraz niższy pobór mocy urządzeń elektronicznych umożliwił rozwój sieci Wireless Body Area Network (WBAN), w której węzły znajdują się w pobliżu lub wewnątrz ciała człowieka (sensory nasobne lub wszczepione). Sieci WBAN mają szczególne zastosowanie w systemach opieki zdrowotnej, na które zapotrzebowanie jest coraz większe ze względu na starzenie się populacji w krajach wysokorozwiniętych.

  • BADANIE I ANALIZA METOD ALOKACJI STRUMIENI DANYCH W HETEROGENICZNYCH SIECIACH WBAN

    W artykule przedstawiono nową metodę adaptacyjnej alokacji strumieni danych w heterogenicznej sieci WBAN (Wireless Body Area Network) typu off-body oraz wykonane stanowisko badawcze. Wyniki uzyskane przy użyciu opracowanej metody porównano z wybranymi algorytmami możliwymi do zastosowania w tychże sieciach. Wykazano zwiększenie efektywności wykorzystania dostępnych zasobów czasowo-częstotliwościowych niezależnie od miejsca montażu...

  • Nowa adaptacyjna metoda alokacji strumieni danych oparta na estymacie parametrów kanału radiowego w heterogenicznej sieci WBAN

    W artykule przedstawiono nową metodę adaptacyjnej alokacji strumieni danych w heterogenicznej sieci WBAN (Wireless Body Area Network) typu off-body oraz wykonane stanowisko badawcze. Wyniki uzyskane przy użyciu opracowanej metody porównano z wybranymi algorytmami możliwymi do zastosowania w tychże sieciach. Wykazano zwiększenie efektywności wykorzystania dostępnych zasobów czasowo-częstotliwościowych niezależnie od miejsca montażu...

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  • Hybrid of Neural Networks and Hidden Markov Models as a modern approach to speech recognition systems

    The aim of this paper is to present a hybrid algorithm that combines the advantages ofartificial neural networks and hidden Markov models in speech recognition for control purpos-es. The scope of the paper includes review of currently used solutions, description and analysis of implementation of selected artificial neural network (NN) structures and hidden Markov mod-els (HMM). The main part of the paper consists of a description...

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  • Integrated Control in High-Speed Networks Using Constrained Model Predictive Control

    Publikacja

    - Rok 2013

    This paper studies congestion control in high-speed communication networks using Model Predictive Control (MPC). Network traffic is assumed to consist of best-effort and priority traffic sources. An integrated controller consisting of two control parts is designed. The controller calculates the capacity for priority sources and the input rate of best-effort sources. MPC is desirable as it can take into account the constraints on...

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  • Architecture and Basic Assumptions of RSMAD

    The study presents the architecture of Radio System for Monitoring and Acquisition of Data from Traffic Enforcement Cameras (in short RSMAD) which is used for transmission (realized using GSM, UMTS or TETRA networks, and through the Internet network), archiving and exploring image data of traffic offenses. The paper also presents selected basic assumptions of the RSMAD system, which are relevant to the implemented by the system...

  • Machine Learning Techniques in Concrete Mix Design

    Concrete mix design is a complex and multistage process in which we try to find the best composition of ingredients to create good performing concrete. In contemporary literature, as well as in state-of-the-art corporate practice, there are some methods of concrete mix design, from which the most popular are methods derived from The Three Equation Method. One of the most important features of concrete is compressive strength, which...

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  • Application of autoencoder to traffic noise analysis

    The aim of an autoencoder neural network is to transform the input data into a lower-dimensional code and then to reconstruct the output from this code representation. Applications of autoencoders to classifying sound events in the road traffic have not been found in the literature. The presented research aims to determine whether such an unsupervised learning method may be used for deploying classification algorithms applied to...

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  • Selected Technical Issues of Deep Neural Networks for Image Classification Purposes

    In recent years, deep learning and especially Deep Neural Networks (DNN) have obtained amazing performance on a variety of problems, in particular in classification or pattern recognition. Among many kinds of DNNs, the Convolutional Neural Networks (CNN) are most commonly used. However, due to their complexity, there are many problems related but not limited to optimizing network parameters, avoiding overfitting and ensuring good...

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  • Analysis of IMS/NGN Call Processing Performance Using Phase-Type Distributions Based on Experimental Histograms

    The paper describes our further research done with the proposed analytical and simulation traffic models of the Next Generation Network (NGN), which is standardized for delivering multimedia services with strict quality and includes elements of the IP Multimedia Subsystem (IMS). The aim of our models of a single IMS/NGN domain is to evaluate two standardized call processing performance parameters, which appropriate values are very...

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  • Correlations of structural, thermal and electrical properties of sodium doped complex borophosphosilicate glass

    Borophosphosilicate glasses with varying sodium ion concentrations were investigated for their, structural, thermal, and electrical properties. All the obtained glasses were transparent except the glass with the highest sodium content, which exhibited translucency due to inhomogeneities. Increasing sodium content led to reduced boron and silicon content while maintaining a constant B/Si ratio, indicating progressive depolymerization...

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  • Deep learning-enabled integration of renewable energy sources through photovoltaics in buildings

    Publikacja
    • M. Arun
    • T. T. Le
    • D. Barik
    • P. Sharma
    • S. M. Osman
    • V. K. Huynh
    • J. Kowalski
    • V. H. Dong
    • V. V. Le

    - Case Studies in Thermal Engineering - Rok 2024

    Installing photovoltaic (PV) systems in buildings is one of the most effective strategies for achieving sustainable energy goals and reducing carbon emissions. However, the requirement for efficient energy management, the fluctuating energy demands, and the intermittent nature of solar power are a few of the obstacles to the seamless integration of PV systems into buildings. These complexities surpass the capabilities of rule-based...

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  • Creating Dynamic Maps of Noise Threat Using PL-Grid Infrastructure

    The paper presents functionality and operation results of a system for creating dynamic maps of acoustic noise employing the PL-Grid infrastructure extended with a distributed sensor network. The work presented provides a demonstration of the services being prepared within the PLGrid Plus project for measuring, modeling and rendering data related to noise level distribution in city agglomerations. Specific computational environments,...

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  • Analysis of IMS/NGN call processing performance using phase-type distributions

    Publikacja

    - Rok 2013

    This work is a continuation of our research on the traffic model dedicated for design and analysis of the Next Generation Network (NGN), which is standardized for distribution of current and future multimedia services based on the IP Multimedia Subsystem (IMS). Our analytical and simulation models allow evaluation of mean Call Set-up Delay E(CSD) as well as mean Call Disengagement Delay E(CDD) in a single domain of IMS/NGN. Ensuring...

  • On Software Unit Testing For Security and Performance Gain At Unit Level

    Publikacja

    Performance and security are software (SW) application attributes situated on the opposite corners of system design. In the most drastic example the most secure component is the one totally isolated from the outside world, with communication performance reduced to zero level (e.g. disconnected physically from the network, placed inside a Faraday cage to eliminate possible wireless accessibility). On the other hand the most performance-optimized...

  • On Software Unit Testing For Improving Security And Performance Of Distributed Applications

    Performance and security are software (SW) application attributes situated on the opposite corners of system design. In the most drastic example the most secure component is the one totally isolated from the outside world, with communication performance reduced to zero level (e.g. disconnected physically from the network, placed inside a Faraday cage to eliminate possible wireless accessibility). On the other hand the most performance-optimized...

  • Thermal Images Analysis Methods using Deep Learning Techniques for the Needs of Remote Medical Diagnostics

    Publikacja

    - Rok 2020

    Remote medical diagnostic solutions have recently gained more importance due to global demographic shifts and play a key role in evaluation of health status during epidemic. Contactless estimation of vital signs with image processing techniques is especially important since it allows for obtaining health status without the use of additional sensors. Thermography enables us to reveal additional details, imperceptible in images acquired...

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  • Static Shunt PE Voltage-Quality Controllers

    Publikacja

    - Rok 2007

    This chapter focuses on power electronics (PE)-based solutions used in distribution networks for reduction of supply-voltage-quality deterioration, from long interruptions to the harmonics. Various PE devices and their combinations are addressed for particular or a range of voltage disturbances. A particular solution is applied taking into account demands for voltage quality and network configuration. In general, there are three...

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  • Impact of SDN Controller’s Performance on Quality of Service

    Publikacja

    Software Defined Networking is a paradigm in network architecture; that is quickly becoming commonplace in modern telecommunication systems. It facilitates network customization for the requirements of different applications and simplifies the implementation of new services. Since its proposal, a significant evolution in its functionality has occurred. However, this development brought along problems of efficiency and performance,...

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