Wyniki wyszukiwania dla: FIREFLY ALGORITHM

• An Approximation of the Zero Error Capacity by a Greedy Algorithm

  Publikacja

  • M. Jurkiewicz

  - Rok 2020

  We present a greedy algorithm that determines a lower bound on the zero error capacity. The algorithm has many new advantages, e.g., it does not store a whole product graph in a computer memory and it uses the so-called distributions in all dimensions to get a better approximation of the zero error capacity. We also show an additional application of our algorithm.

• Complementary oriented allocation algorithm for cloud computing

  Publikacja

  • P. Orzechowski

  - TASK Quarterly - Rok 2017

  Nowadays cloud computing is one of the most popular processing models. More and more different kinds of workloads have been migrated to clouds. This trend obliges the community to design algorithms which could optimize the usage of cloud resources and be more effiient and effective. The paper proposes a new model of workload allocation which bases on the complementarity relation and analyzes it. An example of a case of use is shown...

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• Measuring Tilt with an IMU Using the Taylor Algorithm

  Publikacja

  • J. Demkowicz

  - Remote Sensing - Rok 2024

  This article addresses the important problem of tilt measurement and stabilization. This is particularly important in the case of drone stabilization and navigation in underwater environments, multibeam sonar mapping, aerial photogrammetry in densely urbanized areas, etc. The tilt measurement process involves the fusion of information from at least two different sensors. Inertial sensors (IMUs) are unique in this context because...

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• Adversarial attack algorithm for traffic sign recognition

  Publikacja

  • J. Wang
  • L. Shi
  • Y. Zhao
  • H. Zhang
  • E. Szczerbicki

  - MULTIMEDIA TOOLS AND APPLICATIONS - Rok 2022

  Deep learning suffers from the threat of adversarial attacks, and its defense methods have become a research hotspot. In all applications of deep learning, intelligent driving is an important and promising one, facing serious threat of adversarial attack in the meanwhile. To address the adversarial attack, this paper takes the traffic sign recognition as a typical object, for it is the core function of intelligent driving. Considering...

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• Marking the Allophones Boundaries Based on the DTW Algorithm

  Publikacja

  • J. Rafałko

  - Rok 2018

  The paper presents an approach to marking the boundaries of allophones in the speech signal based on the Dynamic Time Warping (DTW) algorithm. Setting and marking of allophones boundaries in continuous speech is a difficult issue due to the mutual influence of adjacent phonemes on each other. It is this neighborhood on the one hand that creates variants of phonemes that is allophones, and on the other hand it affects that the border...

• New Indoor Positioning Algorithm for Distance Measurements

  Publikacja

  • A. Czapiewska

  - Rok 2017

  In the paper a new indoor positioning algorithm is presented. This algorithm takes into account selected features of radio wave propagation in indoor environment. This results in improvement in accuracy of calculated position estimates. A comparative analysis of this new algorithm with Chan and Foy algorithms was made and described in the paper. This comparative analysis was made with utilization of real radio distance measurements.

• Finite-window RLS algorithms

  Publikacja

  • L. Shen
  • Y. Zakharov
  • M. Niedźwiecki
  • A. Gańcza

  - SIGNAL PROCESSING - Rok 2022

  Two recursive least-squares (RLS) adaptive filtering algorithms are most often used in practice, the exponential and sliding (rectangular) window RLS algorithms. This popularity is mainly due to existence of low-complexity versions of these algorithms. However, these two windows are not always the best choice for identification of fast time-varying systems, when the identification performance is most important. In this paper, we...

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• Subspace Algorithms for Face Verification

  Publikacja

  • M. Smiatacz

  - Rok 2011

  W rzeczywistych zastosowaniach problem weryfikacji wydaje się ważniejszy od klasyfikacji. Na ogół dysponujemy jedynie niewielkim zbiorem obrazów uczących reprezentujących daną osobę, a naszym zadaniem jest podjęcie decyzji odnośnie tego, czy nowo pozyskana fotografia jest do nich wystarczająco podobna - bez użycia oddzielnego zbioru przykładów negatywnych. W takim przypadku uzasadnione wydaje się zastosowanie metody podprzestrzeni,...

• Algorithms for testing security in graphs

  Publikacja

  • A. Hiler
  • R. Lewoń
  • M. Małafiejski

  - Studia i Materiały Informatyki Stosowanej - Rok 2014

  In this paper we propose new algorithmic methods giving with the high probability the correct answer to the decision problem of security in graphs. For a given graph G and a subset S of a vertex set of G we have to decide whether S is secure, i.e. every subset X of S fulfils the condition: |N[X] \cap S| >= |N[X] \ S|, where N[X] is a closed neighbourhood of X in graph G. We constructed a polynomial time property pseudotester based...

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• A study of nighttime vehicle detection algorithms

  Dane Badawcze

  wersja 1.0 open access

  • J. Kwiatkowski

  This dataset is from my master's thesis "A study of nighttime vehicle detection algorithms". It contains both raw data and preprocessed dataset ready to use. In the pictures below you can see how images were annotated.

• Polynomial Algorithm for Minimal (1,2)-Dominating Set in Networks

  Publikacja

  • J. Raczek

  - Electronics - Rok 2022

  Dominating sets find application in a variety of networks. A subset of nodes D is a (1,2)-dominating set in a graph G=(V,E) if every node not in D is adjacent to a node in D and is also at most a distance of 2 to another node from D. In networks, (1,2)-dominating sets have a higher fault tolerance and provide a higher reliability of services in case of failure. However, finding such the smallest set is NP-hard. In this paper, we...

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• On the EM algorithm for the estimation of speech AR parameters in noise

  Publikacja

  • M. Kuropatwinski
  • B. Kleijn
  • M. Kuropatwiński

  - Rok 2014

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• an intelligent image processing sensor - the algorithm and the hardware implementation

  Publikacja

  • M. Wójcikowski
  • R. Żaglewski
  • B. Pankiewicz

  - Rok 2008

  W artykule przedstawiono algorytm przeznaczony do rozpoznawania obiektów ruchomych w obrazie do celu analizy ruchu pojazdów. Algorytm został zrealizowany w układzie FPGA.Ang.: This paper describes the idea and theimplementation of the robust algorithm dedicated toextraction of moving vehicles from real-time cameraimages for the evaluation of traffic parameters, suchas the number of vehicles, their direction of movementand their...

• Implementation of matrix-type FDTD algorithm on a graphics accelerator

  Publikacja

  • A. Dziekoński
  • P. Sypek
  • Ł. Kulas
  • M. Mrozowski

  - Rok 2008

  Artykuł prezetuje implementację algorytmu FDTD w postaci macierzowej przeznaczonej dla kart graficznych. Wykazany został wzrost efektywności obliczeń numerycznych w odniesieniu do implementacji przeznaczonej dla procesora komputerowego.

• An Agent-Based Simulated Annealing Algorithm for Data Reduction

  Publikacja

  • I. Czarnowski
  • P. Jędrzejowicz

  - Rok 2010

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• Data Reduction Algorithm for Machine Learning and Data Mining

  Publikacja

  • I. Czarnowski
  • P. Jȩdrzejowicz

  - Rok 2008

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• A New Heuristic Algorithm for Effective Preemption in MPLS Networks

  Publikacja

  • S. Kaczmarek
  • K. Nowak

  - Rok 2006

  W artykule opisano nowy algorytm wywłaszczania przeznaczony dla sieci MPLS. Umożliwia on alokację zasobów sieci dla nowej ścieżki uwzględniając koszt usuniętych jednej lub wielu istniejących już ścieżek. Proponowany heurystyczny algorytm wybiera ścieżki do wywłaszczenia wykorzystując informację o topologii sieci. Używa funkcji optymalizacji minimalizującej stratę pasma na poziomie sieci. Przedstawiono i omówiono wyniki badań symulacyjnych...

• An approximation algorithm for maximum P3-packing in subcubic graphs

  Publikacja

  • A. Kosowski
  • M. Małafiejski
  • P. Żyliński

  - INFORMATION PROCESSING LETTERS - Rok 2006

  W pracy podano algorytm 4/3-przyliżony dla trudnego obliczeniowo problemu umieszczania wierzchołkowo rozłącznych dwukrawędziowych ścieżek w grafach o stopniu maksymalnym 3 i stopniu minimalnym 2. Poprawiono tym samym wcześniejsze wyniki dla grafów kubicznych (A. Kelmans, D. Mubayi, Journal of Graph Theory 45, 2004).

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• An efficient algorithm for mobile guarded guards in simple grids

  Publikacja

  • A. Kosowski
  • M. Małafiejski
  • P. Żyliński

  - Rok 2006

  W pracy rozważono problem strzeżenia ortogonalnych krat dwuwymiarowych przez mobilne straże strzeżone. Podano algorytmy wielomianowe m.in. dla przypadku krat prostych i dla przypadku krat bez przeszkód w kierunku poziomym (pionowym).

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• Novel 5.1 Downmix Algorithm with Improved Dialogue Intelligibility

  Publikacja

  • K. Łopatka
  • B. Kunka
  • A. Czyżewski

  - Rok 2013

  A new algorithm for 5.1 to stereo downmix is introduced, which addresses the problem of dialogue intelligibility. The algorithm utilizes proposed signal processing algorithms to enhance the intelligibility of movie dialogues, especially in difficult listening conditions or in compromised speaker setup. To account for the latter, a playback configuration utilizing a portable device, i.e. an ultrabook, is examined. The experiments...

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• Distributed Evolutionary Algorithm for Path Planning in Navigation Situation

  Publikacja

  • R. Śmierzchalski
  • Ł. Kuczkowski
  • P. Kolendo
  • B. Jaworski

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

  This article presents the use of a multi-population distributed evolutionary algorithm for path planning in navigation situation. The algorithm used is with partially exchanged population and migration between independently evolving populations. In this paper a comparison between a multi-population and a classic single-population algorithm takes place. The impact on the ultimate solution has been researched. It was shown that using...

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• A new optimal algorithm for a time-dependent scheduling problem

  Publikacja

  • M. Kubale
  • K. Ocetkiewicz

  - CONTROL AND CYBERNETICS - Rok 2009

  In this article a single machine time-dependent scheduling problem with total completion time criterion is considered. There are n given jobs j_1, ..., j_n and the processing time pi of the i-th job is given by p_i = 1 + b_is_i, where si is the starting time of the i-th job, i = 1, ..., n. If all jobs have different and non-zero deterioration rates and bi > bj => bi >= (b_min+1)/(b_min) b_j + 1/b_min, where b_min = min{b_i}, then...

• Ontology clustering by directions algorithm to expand ontology queries

  Publikacja

  • A. Kaczmarek

  - Rok 2009

  This paper concerns formulating ontology queries. It describes existing languages in which ontologies can be queried. It focuses on languages which are intended to be easily understood by users who are willing to retrieve information from ontologies. Such a language can be, for example, a type of controlled natural language (CNL). In this paper a novel algorithm called Ontology Clustering by Directions is presented. The algorithm...

• A linear time algorithm for edge coloring of binomial trees

  Publikacja

  • M. Kubale
  • K. Piwakowski
  • M. Kubale

  - DISCRETE MATHEMATICS - Rok 1996

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• A polynomial algorithm for finding T-span of generalized cacti

  Publikacja

  • K. Giaro
  • R. Janczewski
  • M. Małafiejski

  - DISCRETE APPLIED MATHEMATICS - Rok 2003

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• An Approximation Algorithm for Diagnostic Test Scheduling in Multicomputer Systems

  Publikacja

  • . Krawczyk
  • . Kubale
  • M. Kubale

  - IEEE TRANSACTIONS ON COMPUTERS - Rok 1985

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• The cartographer algorithm for processing and querying description logics ontologies

  Publikacja

  • K. Goczyła
  • T. M. Grabowska
  • M. Zawadzki
  • W. Waloszek

  - Rok 2005

  Logika opisowa jest jednym z najbardziej popularnych formalizmów opisu wiedzy. Jej popularność jeszcze wzrosła kiedy pojawił się standard języka OWL. W artykule zaprezentowano nowy algorytm wnioskowania - algorytm kartograficzny - umożliwiający wnioskowanie niejawnie podanej wiedzy z terminologii (TBox) i opisu świata (ABox). Opisano sposób przetwarzania ontologii w terminach sygnatur binarnych i efektywny sposób odpytywania ontologii...

• Octave Error Immune and Instantaneous Pitch Detection Algorithm.

  Publikacja

  • M. Dziubiński
  • B. Kostek

  - Rok 2005

  Celem publikacji jest prezentacja odpornego na błędy oktawowe, bazującego na analizie widmowej algorytmu detekcji częstotliwości podstawowej. Zaproponowana metoda dobrze sobie radzi z sygnałami o dużej zawartości sygnałów harmonicznych, jak i z prawie sinusoidalnymi przebiegami. Eksperymenty przeprowadzonno na 567 dzwiękach instrumentów muzycznych. Dźwięki grane były z różnymi artykulacjami, dynamiką i reprezentowałe były w całej...

• Genetic algorithm for fatique crack detection in Timoshenko beam.

  Publikacja

  • M. Krawczuk

  - Rok 2004

  W pracy przedstawiono metodę detekcji peknięć zmęczeniowych w początkowej fazie ich rozwoju. Algorytm detekcji wykorzystuje metodę algorytmów genetycznych połączoną z metodą gradientową. Funkcja celu oparta została o zmiany w propagujacej fali sprężystej.

• An efficient algorithm for the longest tandem scattered subsequence problem.

  Publikacja

  • A. Kosowski

  - Rok 2004

  Referat dotyczy zagadnienia wyznaczania najdłuższego podciągu podwójnego (typu x1,x2,...,xk,x1,x2,...,xk) dla zadanego ciągu znaków (y1,y2,...,yn). Podano algorytm o złożoności obliczeniowej O(n^2) i pamięciowej O(n) znajdujący optymalne rozwiązanie postawionego problemu.

• Parameters of evolutionary algorithm in problem of collision avoidance at sea

  Publikacja

  • R. Smierzchalski
  • A. Łebkowski

  - Rok 2002

  ...

• A polynomial algorithm for finding T-span of generalized cacti.

  Publikacja

  • K. Giaro
  • R. Janczewski
  • M. Małafiejski

  - DISCRETE APPLIED MATHEMATICS - Rok 2003

  W pracy opisano wielomianowy algorytm wyznaczający optymalne T-pokolorowania dla uogólnionych kaktusów.

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• FFT spectrum based matching algorithm for activedynamic thermography

  Publikacja

  • M. Moderhak

  - QIRT Journal - Rok 2010

  In Active Dynamic thermography (ADT) sequences of consecutive temperature distributions are analyzed. In biomedical applications of ADT, the problems of a patient's movements in front of a thermal camera should be eliminated before data analysis. Complete mechanical stabilization of the patients is impossible due to natural voluntary and involuntary moves caused by pulse breathing, etc. This paper presents a simple and efficient...

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• Interactive Query Expansion with the Use of Clustering by Directions Algorithm

  Publikacja

  • A. Kaczmarek

  - IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS - Rok 2011

  This paper concerns Clustering by Directions algorithm. The algorithm introduces a novel approach to interactive query expansion. It is designed to support users of search engines in forming web search queries. When a user executes a query, the algorithm shows potential directions in which the search can be continued. This paper describes the algorithm and it presents an enhancement which reduces the computational complexity of...

• Voice command recognition using hybrid genetic algorithm

  Publikacja

  • M. Wroniszewska
  • J. Dziedzic

  - TASK Quarterly - Rok 2010

  Abstract: Speech recognition is a process of converting the acoustic signal into a set of words, whereas voice command recognition consists in the correct identification of voice commands, usually single words. Voice command recognition systems are widely used in the military, control systems, electronic devices, such as cellular phones, or by people with disabilities (e.g., for controlling a wheelchair or operating a computer...

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• Robust unsupervised georeferencing algorithm for aerial and satellite imagery

  Publikacja

  • K. Bruniecki
  • S. Dąbrowski
  • Ł. Kamiński
  • A. Chybicki
  • M. Moszyński

  - Rok 2011

  In order to eliminate a human factor and fully automate the process of embedding the spatial localization information in a remote sensed image the integrated georeferencing method was proposed. The paper presents this unsupervised and robust approach which is comprised of pattern recognition, using SIFT-based detector, and RANSAC based outlier removal with matching algorithm.

• Impact of Initial Population on Evolutionary Path Planning Algorithm

  Publikacja

  • Ł. Kuczkowski
  • R. Śmierzchalski

  - Rok 2014

  In this paper an impact of initial population on evolutionary path planning algorithm is presented. Tested algorithm is used to determine close to optimal ship paths in collision avoidance situation. For this purpose a path planning problem is defined. A specific structure of the individual path and fitness function is presented. For the simulation purposes a close to real tested environment is created. Four tests are performed....

• AN ALGORITHM FOR PORTAL HYPERTENSIVE GASTROPATHY RECOGNITION ON THE ENDOSCOPIC RECORDINGS

  Publikacja

  • J. Cychnerski
  • P. Dorożyński
  • T. Dziubich

  - Rok 2014

  Symptoms recognition of portal hypertensive gastropathy (PHG) can be done by analysing endoscopic recordings, but manual analysis done by physician may take a long time. This increases probability of missing some symptoms and automated methods may be applied to prevent that. In this paper a novel hybrid algorithm for recognition of early stage of portal hypertensive gastropathy is proposed. First image preprocessing is described....

• Complex Root Finding Algorithm Based on Delaunay Triangulation

  Publikacja

  • P. Kowalczyk

  - ACM TRANSACTIONS ON MATHEMATICAL SOFTWARE - Rok 2015

  A simple and flexible algorithm for finding zeros of a complex function is presented. An arbitrary-shaped search region can be considered and a very wide class of functions can be analyzed, including those containing singular points or even branch cuts. The proposed technique is based on sampling the function at nodes of a regular or a self-adaptive mesh and on the analysis of the function sign changes. As a result, a set of candidate points...

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• Robust algorithm for active feedback control of narrowband noise

  Publikacja

  • M. Meller
  • M. Niedźwiecki
  • M. Gajdzica

  - Rok 2015

  The problem of active control of narrowband acoustic noise is considered. It is shown that the proposed earlier feedback control algorithm called SONIC (self-optimizing narrowband interference canceller), based on minimization of the L2-norm performance measure, can be re-derived using the L1 approach. The resulting robust SONIC algorithm is more robust to heavy-tailed measurement noise, such as the αlpha-stable noise, than the...

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• Lexicon Based Algorithm for Domain Ontology Merging and Alignment

  Publikacja

  • T. M. Boiński
  • H. Krawczyk

  - Rok 2012

  More and more systems contain some kind of knowledge describing their field of operation. Such knowledge in many cases is stored as an ontology. A need arises for ability to quickly match those ontologies to enable interoperability of such systems. The paper presents a lexicon based algorithm for merging and aligning of OWL ontologies. The proposed similarity levels are being presented and the proposed algorithm is being described....

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• A Backtracking Search Algorithm for Distribution Network Reconfiguration Problem

  Publikacja

  • T. Nguyen
  • H. Pham
  • A. Truong
  • T. Phung
  • T. Nguyen

  - Rok 2016

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• APPLICATION OF APRIORI ALGORITHM IN THE LAMINATION PROCESS IN YACHT PRODUCTION

  Publikacja

  • T. Niksa-Rynkiewicz
  • M. Landowski
  • P. Szalewski

  - Polish Maritime Research - Rok 2020

  The article specifies the dependence of defects occurring in the lamination process in the production of yachts. Despite great knowledge about their genesis, they cannot be completely eliminated. Authentic data obtained through cooperation with one of the Polish yacht shipyards during the years 2013–2017 were used for the analysis. To perform a simulation, the sample size was observed in 1450 samples, consisting of 6 models of...

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• Comparison of new position estimation algorithm for indoor environment

  Publikacja

  • A. Czapiewska
  • J. Sadowski

  - Rok 2014

  In the paper a new position estimation algorithm based on distance measurements is presented. This algorithm is dedicated for indoor environments. In the paper the new algorithm is compared with Chan algorithm. For the comparison were used real measurements conducted inside a building.

• Information Retrieval with the Use of Music Clustering by Directions Algorithm

  Publikacja

  • A. Kaczmarek

  - Rok 2013

  This paper introduces the Music Clustering by Directions (MCBD) algorithm. The algorithm is designed to support users of query by humming systems in formulating queries. This kind of systems makes it possible to retrieve songs and tunes on the basis of a melody recorded by the user. The Music Clustering by Directions algorithm is a kind of an interactive query expansion method. On the basis of query, the algorithm provides suggestions...

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• Impact of Initial Population on Evolutionary Path Planning Algorithm

  Publikacja

  • Ł. Kuczkowski
  • R. Śmierzchalski

  - Rok 2015

  In this paper an impact of initial population on evolutionary path planning algorithm is presented. Tested algorithm is used to determine close to optimal shippaths in collision avoidance situation. For this purpose a path planning problem is defined. A specific structure of the individual path and fitness function is presented. For the simulation purposes a close to real tested environment is created. Four tests are performed....

• COMPARISON OF SOFTWARE AND HARDWARE REALIZATION OF AES CRYPTOGRAPHIC ALGORITHM

  Publikacja

  • M. Wójcikowski
  • B. Pankiewicz

  - Zeszyty Naukowe Wydziału ETI Politechniki Gdańskiej. Technologie Informacyjne - Rok 2007

  In this paper hardware and software realization of direct and inverse AES cryptographic algorithm is presented. Both implementations were made using the Virtex-II FPGA and were practically tested. As the criteria of comparison, the resource utilization, achieved performance and power dissipation were chosen. Hardware realization increases throughput of conversion about 190 times over software implementation and decreases the energy...

• DEVELOPMENT OF THE ALGORITHM OF POLISH LANGUAGE FILM REVIEWS PREPROCESSING

  Publikacja

  • N. Rizun
  • J. Taranenko

  - Rocznik Naukowy Wydzialu Zarzadzania w Ciechanowie - Rok 2017

  The algorithm and the software for conducting the procedure of Preprocessing of the reviews of films in the Polish language were developed. This algorithm contains the following steps: Text Adaptation Procedure; Procedure of Tokenization; Procedure of Transforming Words into the Byte Format; Part-of-Speech Tagging; Stemming / Lemmatization Procedure; Presentation of Documents in the Vector Form (Vector Space Model) Procedure; Forming...

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• A comparative study of English viseme recognition methods and algorithm

  Publikacja

  • D. Jachimski
  • A. Czyżewski

  - MULTIMEDIA TOOLS AND APPLICATIONS - Rok 2018

  An elementary visual unit – the viseme is concerned in the paper in the context of preparing the feature vector as a main visual input component of Audio-Visual Speech Recognition systems. The aim of the presented research is a review of various approaches to the problem, the implementation of algorithms proposed in the literature and a comparative research on their effectiveness. In the course of the study an optimal feature vector...

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• The algorithm of building the hierarchical contextual framework of textual corpora

  Publikacja

  • N. Rizun
  • W. Waloszek

  - Rok 2018

  This paper presents an approach for Modeling the Latent Semantic Relations. The approach is based on advantages of two computational approaches: Latent Semantic Analysis and Latent Dirichlet Allocation. The scientific question about the possibility of reducing the influence of these Methods limitation on the Quality of the Latent Semantic Relations Analysis Results is raised. The case study for building the Two-level Hierarchical Contextual...

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