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    Wyświetlanie 1-4 z 4
    Tytuł:
    Current State of Deep Ocean Bathymetric Exploration
    Autorzy:
    Zwolak, K.
    Felski, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/320506.pdf
    Data publikacji:
    2017
    Wydawca:
    Polskie Forum Nawigacyjne
    Tematy:
    bathymetry
    ocean
    multibeam echosounder
    AUV
    ASV
    satellite altimetry
    bathymetric map compilation
    Opis:
    The paper presents current state of bathymetric survey concerning deep ocean rather than shallow areas, which are better surveyed due to safety of navigation concerns. Rules and requirements of the new challenge, called the Shell Ocean Discovery XPRIZE, became a starting point for a discussion about the possibilities of mapping large areas of the ocean using up-to-date and new technology. The amount of bathymetric data available nowadays and the current state of ocean map compilations are also discussed in the paper as a motivation to inspire the new initiatives in the deep ocean.
    W artykule przedstawiono obecny stan pomiarów batymetrycznych głębokowodnych obszarów oceanicznych. Zasady najnowszego konkursu Shell Ocean Discovery XPRIZE stały się punktem wyjścia do dyskusji o obecnych możliwościach pozyskiwania danych niezbędnych do tworzenia map oceanów w oparciu o aktualnie dostępne technologie. W artykule poruszono również zagadnienie ilości i cech danych batymetrycznych znajdujących się i udostępnianych w bazach danych gromadzących tego typu informacje.
    Źródło:
    Annual of Navigation; 2017, 24; 257-267
    1640-8632
    Pojawia się w:
    Annual of Navigation
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Oznaczenie cynku w ekstraktach biomasy z kultur pędowych Bacopa monnieri do sztucznych soków trawiennych
    Zinc determination in extracts from bacopa monnieri shoot cultures into simulated gastric fluids
    Autorzy:
    MUSZYŃSKA, Bożena
    ROJOWSKI, Jacek
    ŁOJEWSKI, Maciej
    DZIWULSKA, Karolina
    OPOKA, Włodzimierz
    Powiązania:
    https://bibliotekanauki.pl/articles/1033794.pdf
    Data publikacji:
    2015
    Wydawca:
    Zakład Opieki Zdrowotnej Ośrodek Umea Shinoda-Kuracejo
    Tematy:
    "Bacopa monnieri"
    "DP-ASV method"
    "in vitro culture"
    "zinc"
    Opis:
    Bacopa monnieri (Water hyssop) is a hydrophyte occurring in Asia and the southern US states. This plant is known in India as Brahmi and has been used in Ayurvedic medicine for 5,000 years as sedative, supporting the treatment of insomnia and improving cerebral circulation. For the biological effect in this species are responsible triterpenoids saponins – bacosides. The aim of the study was to obtain the biomass of B. monnieri shoot in vitro cultures, and then evaluating the biomass growth and content of zinc. B. monnieri derived from in vitro culture on Murashige-Skoog medium (MS) and on the same medium, but enriched in organic additives and elements may be a good source of Zinc for the human body. The experiment was also conducted on the commercial formulations containing B. monnieri. For the determination of zinc ions DP ASV method was used. It was found that the use of highly mineralized water (mineral water “Stefan” – Spa Szczawnica) for extraction of B. monnieri biomass from in vitro culture provided the highest concentration of zinc in the material and for the biomass from MS medium with the addition of As (163.52, and 167.23 mg/mL, respectively). The lowest content was found in B. monnieri biomass from MS medium supplemented with serine, and the capsules product (13.54 and 14.57 mg/mL). For extracts of B. monnieri biomass from MS medium enriched with Zn salts into digestive juices the highest concentration of zinc was determined in gastric juice (6.88 mg/mL).
    Źródło:
    Medicina Internacia Revuo; 2015, 26, 105; 175-179
    0465-5435
    Pojawia się w:
    Medicina Internacia Revuo
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Application of an autonomous/unmanned survey vessel (asv/usv) in bathymetric measurements
    Autorzy:
    Specht, C.
    Świtalski, E.
    Specht, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/258532.pdf
    Data publikacji:
    2017
    Wydawca:
    Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
    Tematy:
    autonomous
    unmanned survey vessel (ASV/USV)
    bathymetric measurements
    digital sea bottom model
    bathymetric map
    Opis:
    The accuracy of bathymetric maps, especially in the coastal zone, is very important from the point of view of safety of navigation and transport. Due to the continuous change in shape of the seabed, these maps are fast becoming outdated for precise navigation. Therefore, it is necessary to perform periodical bathymetric measurements to keep them updated on a current basis. At present, none of the institutions in Poland (maritime offices, Hydrographic Office of the Polish Navy) which are responsible for implementation of this type of measurements has at their disposal a hydrographic vessel capable of carrying out measurements for shallow waters (at depths below 1 m). This results in emergence of large areas for which no measurement data have been obtained and, consequently, the maps in the coastal zones are rather unreliable. The article presents the concept of bathymetric measurements for shallow waters with the use of an autonomous, unmanned survey vessel (ASV/USV). For this purpose, the authors modernized a typical ASV/USV unit with standard radio remote control system to the fully autonomous mode. As part of the modernization, the route planning software was created. The developed software works based on, alternatively, GNSS measurements of the coastline, or satellite images. The system was supplemented by an own autopilot (adapted for flying drones). Moreover, the method of controlling electric motors was changed thanks to the use of own electronic circuit. The modernized ASV/USV measuring system was verified by performing bathymetric measurements of the retention reservoir in Gdansk, Poland. Then, the obtained measurement data were used to create a digital bottom model and a bathymetric map of the reservoir.
    Źródło:
    Polish Maritime Research; 2017, 3; 36-44
    1233-2585
    Pojawia się w:
    Polish Maritime Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    An improved ant colony optimization algorithm and its application to text-independent speaker verification system
    Autorzy:
    Aghdam, M. H.
    Powiązania:
    https://bibliotekanauki.pl/articles/91678.pdf
    Data publikacji:
    2012
    Wydawca:
    Społeczna Akademia Nauk w Łodzi. Polskie Towarzystwo Sieci Neuronowych
    Tematy:
    ant colony
    optimization
    ant colony optimization
    ACO
    security
    automatic speaker verification
    ASV
    feature space
    Gaussian mixture model universal background model
    GMM-UBM
    Opis:
    With the growing trend toward remote security verification procedures for telephone banking, biometric security measures and similar applications, automatic speaker verification (ASV) has received a lot of attention in recent years. The complexity of ASV system and its verification time depends on the number of feature vectors, their dimensionality, the complexity of the speaker models and the number of speakers. In this paper, we concentrate on optimizing dimensionality of feature space by selecting relevant features. At present there are several methods for feature selection in ASV systems. To improve performance of ASV system we present another method that is based on ant colony optimization (ACO) algorithm. After feature selection phase, feature vectors are applied to a Gaussian mixture model universal background model (GMM-UBM) which is a text-independent speaker verification model. The performance of proposed algorithm is compared to the performance of genetic algorithm on the task of feature selection in TIMIT corpora. The results of experiments indicate that with the optimized feature set, the performance of the ASV system is improved. Moreover, the speed of verification is significantly increased since by use of ACO, number of features is reduced over 80% which consequently decrease the complexity of our ASV system.
    Źródło:
    Journal of Artificial Intelligence and Soft Computing Research; 2012, 2, 4; 301-315
    2083-2567
    2449-6499
    Pojawia się w:
    Journal of Artificial Intelligence and Soft Computing Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-4 z 4

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