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    Wyświetlanie 1-12 z 12
    Tytuł:
    Effect of Time-domain Windowing on Isolated Speech Recognition System Performance
    Autorzy:
    Ananthakrishna, Thalengala
    Anitha, H.
    Girisha, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/2055228.pdf
    Data publikacji:
    2022
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    hidden Markov model
    HMM
    isolated speech recognition system
    ISR
    Kannada language
    mono-phone model
    Mel frequency cepstral coefficients
    MFCC
    Opis:
    Speech recognition system extract the textual data from the speech signal. The research in speech recognition domain is challenging due to the large variabilities involved with the speech signal. Variety of signal processing and machine learning techniques have been explored to achieve better recognition accuracy. Speech is highly non-stationary in nature and therefore analysis is carried out by considering short time-domain window or frame. In the speech recognition task, cepstral (Mel frequency cepstral coefficients (MFCC)) features are commonly used and are extracted for short time-frame. The effectiveness of features depend upon duration of the time-window chosen. The present study is aimed at investigation of optimal time-window duration for extraction of cepstral features in the context of speech recognition task. A speaker independent speech recognition system for the Kannada language has been considered for the analysis. In the current work, speech utterances of Kannada news corpus recorded from different speakers have been used to create speech database. The hidden Markov tool kit (HTK) has been used to implement the speech recognition system. The MFCC along with their first and second derivative coefficients are considered as feature vectors. Pronunciation dictionary required for the study has been built manually for mono-phone system. Experiments have been carried out and results have been analyzed for different time-window lengths. The overlapping Hamming window has been considered in this study. The best average word recognition accuracy of 61.58% has been obtained for a window length of 110 msec duration. This recognition accuracy is comparable with the similar work found in literature. The experiments have shown that best word recognition performance can be achieved by tuning the window length to its optimum value.
    Źródło:
    International Journal of Electronics and Telecommunications; 2022, 68, 1; 161--166
    2300-1933
    Pojawia się w:
    International Journal of Electronics and Telecommunications
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Kocncepcja wykorzytania informacj i rozpoznawczej w systemach C4ISR na okręcie
    Concepts of using reconnaissance information in the C4ISR systems on the ship
    Autorzy:
    Scheffs, Waldemar
    Powiązania:
    https://bibliotekanauki.pl/articles/2053210.pdf
    Data publikacji:
    2021
    Wydawca:
    Akademia Marynarki Wojennej. Wydział Dowodzenia i Operacji Morskich
    Tematy:
    System C4ISR
    system rozpoznania okrętu
    zautomatyzowany system rozpoznawczy okrętu
    morskie środowisko sieciocentryczne
    C4ISR system
    ship reconnaissance system
    automated reconnaissance system ship
    marine network-centric environment
    Opis:
    Okręty wojenne jako jednostki autonomiczne do realizacji zadań, posiadają systemy rozpoznania, kierowania i rażenia. Powinny one być w zautomatyzowane w jeden system dowodzenia okrętu. Nie każda jednostka jest do tego przystosowania i nie każda ma takie możliwości. W ocenie ekspertów wojskowych środowisko przetwarzania danych na okręcie jest niewydolne w stosunku do potrzeb z uwagi na stopień skomplikowania sytuacji morskiej. Dlatego, aby efektywnie używać okręty należy stworzyć „mega” system wykorzystujący wszystkie okręty powiązane z systemami lotniczymi i lądowymi rodzajów sił zbrojnych. Artykuł prezentuje techniczno-organizacyjne założenia systemu rozpoznania C4ISR1 dla okrętu działającego w morskim środowisku sieciocentrycznym. Bazując na wnioskach i doświadczeniach Polskiego Kontyngentu Wojskowego w Iraku i Afganistanie oraz na założeniach teoretycznych specjalistów Marynarki Wojennej dotyczących działań okrętów na morzach i strefie przybrzeżnej można postawić tezę, że granice między operacjami wojskowymi i niewojskowymi coraz bardziej się zacierają. Rosnące zagrożenia niemilitarne kształtują przyszłe wykorzystanie systemów C4ISR okrętu. Można domniemywać, że systemy C4ISR okrętu będę wykorzystywane w operacjach niemilitarnych. Użycie okrętu to nadal domena operacji morskich, ale jednocześnie należy przypuszczać, iż sama ich obecność może zażegnywać sytuacje kryzysowe. W tym kontekście okręt może realizować zadania monitorowania sytuacji radioelektronicznej w obszarze mu wyznaczonym. Dla takich działań system gromadzenia, przetwarzania i dystrybucji informacji nabiera szczególnego znaczenia.
    Warships, as autonomous units in carrying out their tasks, have systems of recognition, control, and destruction. They should be automated into one ship's command system. Not every individual is adapted to this and not everyone has such possibilities. According to military experts, the data processing environment on the ship is insufficient in relation to the needs due to the complexity of the maritime situation. Therefore, in order to use ships effectively, one should create a "mega" system that uses all ships associated with the air and land systems of the armed forces. The article presents the technical and organizational assumptions of the C4ISR reconnaissance system for a ship operating in a maritime network-centric environment. Based on the conclusions and experiences of the Polish Military Contingent in Iraq and Afghanistan, and on the theoretical assumptions of Navy specialists regarding the activities of ships in the seas and in the coastal zone, it can be argued that the boundaries between military and non-military operations are becoming increasingly blurred. Growing non-military threats shape the future use of the ship's C4ISR systems. It can be presumed that the ship's C4ISR systems will be used in nonmilitary operations. The use of the ship is still the domain of naval operations, but at the same time it should be assumed that their mere presence may avert crisis situations. In this context, the ship may perform the tasks of monitoring the electronic situation in the area assigned to it. For such activities, the information gathering system becomes of particular importance.
    Źródło:
    Rocznik Bezpieczeństwa Morskiego; 2021, R. XV; 71-96
    1898-3189
    Pojawia się w:
    Rocznik Bezpieczeństwa Morskiego
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Wybrane aspekty systemów wywiadu, obserwacji i rozpoznania (ISR)
    Chosen aspects of intelligence, surveillance and reconnaissance (ISR) systems
    Autorzy:
    Matela, Kamila
    Powiązania:
    https://bibliotekanauki.pl/articles/2056500.pdf
    Data publikacji:
    2021
    Wydawca:
    Towarzystwo Wiedzy Obronnej
    Tematy:
    ISR
    wywiad
    obserwacja
    rozpoznanie
    analiza obrazu
    ISTAR
    intelligence
    surveillance
    reconnaissance
    image intelligence
    Opis:
    Niniejsza praca jest próbą syntetycznego przedstawienia współczesnego rozumienia i zastosowania jednego z kluczowych dla każdej armii na świecie obszarów – wywiadu, obserwacji i rozpoznania (ISR). W artykule dokonano podsumowania najważniejszych aspektów ISR i implementacji tego zagadnienia w siłach zbrojnych Polski i NATO oraz wyzwań z nimi związanych. Z uwagi na znaczący postęp technologiczny zaprezentowano również aspekty techniczne jednego z najszybciej rozwijających się rodzajów rozpoznania i wywiadu – analizy obrazu. Każdy rozdział zawiera odniesienie do polskich sił zbrojnych.
    This paper is an attempt to synthetically present the contemporary understanding and application of one of the key areas for any army in the world - intelligence, surveillance and reconnaissance (ISR). The article summarizes the most important aspects of ISR and its implementation in the Polish and NATO armed forces, as well as the challenges associated with them. Due to significant technological progress, technical aspects of one of the fastest growing types of reconnaissance and intelligence - image analysis - are also presented. Each chapter contains a reference to the Polish Armed Forces.
    Źródło:
    Wiedza Obronna; 2021, 3; 238--253
    0209-0031
    2658-0829
    Pojawia się w:
    Wiedza Obronna
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Introduction to coastal HF maritime surveillance radars
    Autorzy:
    Ilcev, Dimov Stojce
    Powiązania:
    https://bibliotekanauki.pl/articles/259808.pdf
    Data publikacji:
    2019
    Wydawca:
    Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
    Tematy:
    HFSWR
    OTHR
    JORN
    WERA
    ISR
    AIS
    LES
    LPA
    LRA
    DOA
    DDC
    PCI
    RCS
    Opis:
    This paper presents the main technical characteristics and working performances of coastal maritime surveillance radars, such as low-power High-Frequency Surface Wave Radars (HFSWR) and Over the Horizon Radars (OTHR). These radars have demonstrated to be a cost-effective long-range early-warning sensor for ship detection and tracking in coastal waters, sea channels and passages. In this work, multi-target tracking and data fusion techniques are applied to live-recorded data from a network of oceanographic HFSWR stations installed in Jindalee Operational Radar Network (JORN), Wellen Radar (WERA) in Ligurian Sea (Mediterranean Sea), CODAR Ocean Sebsorsin and in the German Bight (North Sea). The coastal Imaging Sciences Research (ISR) HFSWR system, Multi-static ISR HF Radar, Ship Classification using Multi-Frequency HF Radar, Coastal HF radar surveillance of pirate boats and Different projects of coastal HF radars for vessels detecting are described. Ship reports from the Automatic Identification System (AIS), recorded from both coastal and satellite Land Earth Stations (LES) are exploited as ground truth information and a methodology is applied to classify the fused tracks and to estimate system performances. Experimental results for all above solutions are presented and discussed, together with an outline for future integration and infrastructures.
    Źródło:
    Polish Maritime Research; 2019, 3; 153-162
    1233-2585
    Pojawia się w:
    Polish Maritime Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Unmanned aircraft systems in support of the land forces. Selected issues
    Autorzy:
    Zieliński, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/347498.pdf
    Data publikacji:
    2017
    Wydawca:
    Akademia Wojsk Lądowych imienia generała Tadeusza Kościuszki
    Tematy:
    unmanned aircraft systems
    air support
    land forces
    planning
    CAS
    ISR
    Opis:
    The following paper presents selected aspects of the employment of unmanned aircraft systems (UAS) during land force operations, it focuses on its capabilities and constrains. In contemporary operations land forces, mainly UAS of I and II class category, are used in ISR missions, most frequently for the tactical support (armed roles) of land forces. These activities are treated as an additional element of the improvement of situational awareness, they also strengthen fire support. The presented article is based on allied and coalition doctrinal papers associated with unmanned aircraft systems.
    Źródło:
    Zeszyty Naukowe / Wyższa Szkoła Oficerska Wojsk Lądowych im. gen. T. Kościuszki; 2017, 2; 195-210
    1731-8157
    Pojawia się w:
    Zeszyty Naukowe / Wyższa Szkoła Oficerska Wojsk Lądowych im. gen. T. Kościuszki
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Evolution of military information management
    Autorzy:
    Mattila, J.
    Parkinson, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/119329.pdf
    Data publikacji:
    2016
    Wydawca:
    Akademia Sztuki Wojennej
    Tematy:
    information science
    information management
    enterprise architecture
    military transformation
    C4ISR
    enterprise resource management
    Opis:
    The paper focuses on information dimension in the structure of Information and Communication Technology architecture and searches for better models to describe the structure of blue force information, especially from Enterprise Architecture (EA) approach. Enterprise Architecture has been developed better to communicate the complex structures of military capabilities. Major EA frameworks (TOGAF, DODAF, NAF) recognize the layer of information between business and technology. Nevertheless, in practice, the focus tends to turn more to the technology as has happened in several Command, Control, Communications, Computing, Information, Surveillance, and Reconnaissance (C4ISR) or Enterprise Resource Management (ERM) programs. The paper develops a tool for architects to use in measuring the maturity of information management in the current military organization and in defining the possible paths of evolution in information management available for military. The outcome is a roadmap that describes the evolution of past and probable future for military information management and explains different drivers and constraints on roads. The roadmap is tested against experiences gained from several C4ISR, and ERM focused military transformations. The overall research approach is following the hypothetico-deductive model, and the roadmap part is applying the theory of evolution in sociotechnical systems. Since information is essential for cognitive level sense making, decision making, and learning, Enterprise Architects should include information maturity in their roadmaps of technical and business process development. The roadmap for military information management is to help the analysing of the current situation and provide possible paths towards future stages aligned through business, information, and technical layers.
    Źródło:
    Zeszyty Naukowe AON; 2016, 4(105); 188-207
    0867-2245
    Pojawia się w:
    Zeszyty Naukowe AON
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Evolution of military information management. The transformation of military organisation often neglects the culture and maturity of its information management
    Autorzy:
    Mattila, Juha
    Parkinson, Simon
    Powiązania:
    https://bibliotekanauki.pl/articles/576467.pdf
    Data publikacji:
    2016-09-23
    Wydawca:
    Akademia Sztuki Wojennej
    Tematy:
    Information Science
    Information Management
    Enterprise Architecture
    Military Transformation
    C4ISR
    Enterprise Resource Management
    Opis:
    Information and Communications Technology (ICT) has made major advances in linking physical dimension through information to cognitive dimension as described by John Perry et al. (2004) in their model for Information Superiority. The information technology linkage between the physical and cognitive dimensions has created new ways of effect both for the red and blue force. The paper focuses on the information dimension and searches for better models to describe the structure of blue force information, especially from the Enterprise Architecture (EA) approach. Enterprise Architecture has been developed to better communicate the complex structures of military capabilities. Major EA frameworks (TOGAF, DODAF) recognise the layer of information between business and technology, but in practice, the focus turns more to the technology as has happened in several Command, Control, Communications, Computing, Information, Surveillance, and Reconnaissance (C4ISR) and Enterprise Resource Management (ERM) programmes. The paper develops a tool for architects to use in measuring the maturity of information management in the current military organisation and in defining the possible paths of evolution in information management available for the military. The outcome of this paper is a roadmap picturing the evolution of military information management. Enterprise Architects may use the roadmap in analysing and developing both C4ISR and ERM capabilities in military organisations. The primary research question for this paper is: What may cause so many failures in defining Enterprise Architecture at information management level and then in implementing C4ISR and ERM tools? The paper first defines six stages for management of unstructured information from various former studies and information architecture models (Cook, 1996). The basic stages of evolution of unstructured information are defined as print, file, page, social media content, semantic content, and intelligent content. These six stages and a generic military structure are processed through an evolutionary model derived from evolutionary theory for technical development described by Joel Mokyr (1998). The Mokyr model helps to recognise the paths of evolution, the forces that may influence the development and the ways that have been taken in achieving goals. The outcome is a roadmap that describes the evolution of past and possible future for military information management and explains different drivers and constraints on roads. The roadmap is aligned with other similar roadmap tools Enterprise Architects are using. The roadmap is further tested against experiences gained from several C4ISR and ERM focused military transformations. The overall research approach follows the hypothetico- deductive model (Brody, 1993) and the roadmap part applies the theory of evolution in sociotechnical systems (Bertalanffy, 1969). Military organisations have followed the general evolutionary path (print – file – page – social media content – semantic – intelligent content) in developing their management of unstructured information. The general path includes two definite leaps that require more effort: 1) from files to pages, and 2) from unstructured content to more structured content. There have also been more discrete shortcuts together with downgrades defined by cultural and doctrinal powers of the force. Meanwhile, it is possible to accelerate evolution by taking shortcuts. A consistent effort to change technology, processes, and people at the same time is needed when, for example, taking force from publish-pull pages to semantic information management. It might be easier to start with structured information and then, gradually, include unstructured information. Strong forces may also pull back already achieved development if the change has not been made to stick properly. Losing the thin trust for shared information management early in implementation may prevent individuals from sharing for a long time. Not providing the expected level of availability of the service for the knowledge base may lose the confidence of process owners. Since information is essential for cognitive level sense making, decision making, and learning, Enterprise Architects should include information maturity in their roadmaps of technical and business process development. The roadmap for military information management is to help analysis of the current situation and provide possible paths towards future stages aligned through business, information, and technical layers. The research in this paper only covers the approach of evolution. The systems and business strategy approached are studied in other papers. This article does not illustrate the integrated roadmap of business, information, and technology, which can be found in further papers by the writers. The research is based mainly on qualitative data in proving the roadmap. There is room for further assurance when the information sharing cultures of the military are enabling it.
    Źródło:
    Security and Defence Quarterly; 2016, 12, 3; 46-73
    2300-8741
    2544-994X
    Pojawia się w:
    Security and Defence Quarterly
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Technology solutions for coalition operations
    Autorzy:
    Wiemer, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/308310.pdf
    Data publikacji:
    2004
    Wydawca:
    Instytut Łączności - Państwowy Instytut Badawczy
    Tematy:
    C4ISR
    coalition
    CCIS
    command and control
    information technology
    military
    defence
    telecommunications
    operations
    SBC
    session border controller
    content inspection
    MPLS
    multi-protocol label switching (MPLS)
    pattern matching
    trusted downgrade
    explicit route
    Opis:
    As computer technology has advanced, information processing in command, control, communications, computers, intelligence, surveillance and reconnaissance (C4ISR) systems has become highly complex. The information processed by these systems is usually of a very highly sensitive nature and is entered into specific systems that are physically isolated from each other. The physical isolation of these systems makes it cumbersome to exchange information between systems. The result is inefficient sharing of sensitive information in situations where timeliness of exchange could be a life or death reality. Since the mid 1990's, increasing efforts have been placed on improving coalition operations. Many systems have been created with the goal to improve the sharing of information and collaborative planning across coalition boundaries. The usability of these systems have had mixed levels of success and improvements will always be necessary. This paper will briefly describe three advances in telecommunications technology that could be leveraged to significantly improve coalition operations. These technologies are; the session border controller (SBC), advances in pattern matching technology, and multi-protocol label switching (MPLS).
    Źródło:
    Journal of Telecommunications and Information Technology; 2004, 4; 31-38
    1509-4553
    1899-8852
    Pojawia się w:
    Journal of Telecommunications and Information Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-12 z 12

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