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    Wyświetlanie 1-15 z 15
    Tytuł:
    AE test of calcareous sands with particle rushing
    Autorzy:
    Tan, F.
    Wang, X.
    Hu, M.
    Wang, R.
    Zhu, C.
    Powiązania:
    https://bibliotekanauki.pl/articles/259886.pdf
    Data publikacji:
    2017
    Wydawca:
    Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
    Tematy:
    calcareous sands
    accoustic emission
    conventional triaxial
    consolidated undrained
    AE signal
    particle crushing
    Opis:
    The particle of calcareous sands was forced to crush, then the energy from the crushing was released by the form of sound waves. Therefore the AE technique was used to detect the calcareous sands AE signal when it crushed. by to study the AE characteristics, the mechanics of calcareous sands was studied. Study showed that: (1) there was the AE activities on the low confining pressure condition at the beginnig of test, (2) there was more and more AE activities with the continuing of test until to the end, (3) the calcareous sands’ AE activities was on the whole testing, (4) the calcareous sands’ particle crushing and mutual friction played different roles for its AE activities. Then the AE model based on the calcarous sands’ particle crushing was discussed.
    Źródło:
    Polish Maritime Research; 2017, S 2; 118-124
    1233-2585
    Pojawia się w:
    Polish Maritime Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Analysis of strain localization in porous media with transversely isotropic elasticity under undrained conditions
    Autorzy:
    Zhang, Y. Q.
    Wang, L. Z.
    Pang, M.
    Fan, L. F.
    Powiązania:
    https://bibliotekanauki.pl/articles/949143.pdf
    Data publikacji:
    2017
    Wydawca:
    Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
    Tematy:
    porous medium
    strain localization
    transverse isotropic elasticity
    undrained condition
    pore fluid compressibility
    Opis:
    The properties of strain localization for elastic-plastic porous media with transversely isotropic elasticity under undrained conditions are investigated. Under non-associated plasticity and tri-axial stress states, the conditions for strain localization of elastic-plastic porous media are derived, in which the effects of deviation from isotropic elasticity and pore fluid compressibility are included. Based on the Mohr-Coulomb yield criterion, the influences of the deviation from isotropic elasticity and pore fluid compressibility on the direction angle of localized band initiation and the corresponding critical hardening modulus for the case of plane strain are discussed. As a result, the properties of strain localization are dependent upon the deviation from isotropic elasticity and pore fluid compressibility. The deviation from isotropic elasticity and pore fluid compressibility has significant impacts on the direction angle of localized band initiation and the corresponding critical hardening modulus.
    Źródło:
    Journal of Theoretical and Applied Mechanics; 2017, 55, 1; 199-211
    1429-2955
    Pojawia się w:
    Journal of Theoretical and Applied Mechanics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Demonstration of a new indicator for studying upwelling in the Northern South China Sea
    Autorzy:
    Lin, L.
    Wang, Y.-S.
    Sun, C.-C.
    Li, N.
    Wang, H.
    Mitchell, B.G.
    Wu, M.-L.
    Song, H.
    Wu, J.-F.
    Powiązania:
    https://bibliotekanauki.pl/articles/48889.pdf
    Data publikacji:
    2011
    Wydawca:
    Polska Akademia Nauk. Instytut Oceanologii PAN
    Tematy:
    China Sea
    cluster analysis
    multivariate statistical analysis
    principal component analysis
    remote sensing
    satellite monitoring
    sea surface temperature
    silicate
    spatial distribution
    upwelling
    Opis:
    In order to demonstrate that silicate (SiO3-Si) can be used as an indicator to study upwelling in the northern South China Sea, hierarchical cluster analysis (CA) and principle component analysis (PCA) were applied to analyse the metrics of the data consisting of 14 physical-chemical-biological parameters at 32 stations. CA categorized the 32 stations into two groups (low and high nutrient groups). PCA was applied to identify five Principal Components (PCs) explaining 78.65% of the total variance of the original data. PCA found important factors that can describe nutrient sources in estuarine, upwelling, and non-upwelling areas. PC4, representing the upwelling source, is strongly correlated to SiO3-Si. The spatial distribution of silicate from the surface to 200 m depth clearly showed the upwelling regions, which is also supported by satellite observations of sea surface temperature.
    Źródło:
    Oceanologia; 2011, 53, 2
    0078-3234
    Pojawia się w:
    Oceanologia
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Dual reference beam digital off-axis holography for exact suppression of zero-order term and twin image without spectrum loss
    Autorzy:
    Wang, M.
    Wang, K.
    Zheng, M.
    Li, F.
    Wu, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/174894.pdf
    Data publikacji:
    2017
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    noise suppression
    pixel-by-pixel multiplication
    digital off-axis holography
    Opis:
    In this paper, we describe an effective approach to suppressing zero-order term and twin image by using pixel-by-pixel multiplication of double holograms in digital off-axis holography. This method records two holograms, respectively, by using the reference waves in different directions. It shows not only a simpler algorithm and easier implementation in experiment, but also exact and complete suppression of the zero-order term and twin image without any spectrum loss of the object in the image reconstruction, particularly when the image and the zero-order term are fairly close to each other. The experimental result approves of the theoretical prediction very well. This approach provides an effective solution to suppressing undesired noises in the digital off-axis holography.
    Źródło:
    Optica Applicata; 2017, 47, 3; 435-443
    0078-5466
    1899-7015
    Pojawia się w:
    Optica Applicata
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effects of synthesis conditions on the synthesis of carbon nanofibers by ethanol catalytic combustion
    Wpływ warunków syntezy na syntezę nanowłókien węglowych metoda katalitycznego spalania etanolu
    Autorzy:
    Cheng, J.
    Zou, X. P.
    Zhu, G.
    Wang, M. F.
    Su, Y.
    Yang, G. Q.
    Lu, X. M.
    Powiązania:
    https://bibliotekanauki.pl/articles/354282.pdf
    Data publikacji:
    2012
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    synteza
    nanowłókna węglowe
    spalanie
    etanol
    carbon nanofibers
    ethanol catalytic combustion
    influence factors
    Opis:
    In this paper, the effects of position of substrates in flames, preparation time, stability of flames and catalyst precursors on the synthesis of carbon nanofibers (CNFs) by ethanol catalytic combustion (ECC) were investigated. For investigating the effects of these influence factors on the synthesis of CNFs, several sets of controlled experiments were performed, such as preparation experiments with different position of substrates in flames, different preparation time, stable and unstable flames, and different catalyst precursors. In our experiments, the catalyst precursors were iron nitrate, cobalt nitrate, nickel nitrate, and iron chloride, cobalt chloride, nickel chloride. The as-synthesized products were characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), and Raman spectroscopy. Our results indicate that the optimal position of substrates in flames is more than 1cm and less than 2.5cm, the optimal preparation time is more than 5min and less than 30min for massive yield, stable flames would be tent to synthesize CNFs with mainly single-type morphology and could improve the graphitization of CNFs, and the catalyst precursors obviously have effects on the synthesis of CNFs.
    W niniejszej pracy zbadany został wpływ położenia substratów w płomieniach, czasu przygotowania, stabilności płomieni i prekursorów katalizatora na syntezę nanowłókien węglowych (CNFs) metodaą katalitycznego spalania etanolu (ECC). W celu zbadania wpływu tych czynników na syntezę nanowłókien węglowych przeprowadzono kilka zestawów kontrolowanych eksperymentów, przy różnej pozycji podłoży w płomieniach, różnym czasie przygotowania, płomieniach stabilnych i niestabilnych i przy użyciu różnych prekursorów katalizatora. W naszych eksperymentach jako prekursory katalizatora stosowano azotany: żelaza, kobaltu i niklu oraz chlorki żelaza, kobaltu i niklu. Tak otrzymane produkty syntezy scharakteryzowano za pomocą skaningowej mikroskopii elektronowej (SEM), transmisyjnej mikroskopii elektronowej (TEM) i spektroskopii Raman'a. Nasze wyniki wskazują, że optymalna pozycja podłoży w płomieniach to więcej niż 1 cm i mniej niż 2,5 cm, a optymalny czas przygotowania to więcej niż 5 min i mniej niż 30 min dla dużej wydajności. Stabilność płomieni będzie sprzyjać syntezie nanowłókien o morfologii jednego typu i może poprawić ich grafityzacje, a rodzaj prekursora katalizatora ma wpływ na syntezę nanowłókien.
    Źródło:
    Archives of Metallurgy and Materials; 2012, 57, 3; 745-751
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Efficient sulfidization of lead oxide at high temperature using pyrite as vulcanizing reagent
    Autorzy:
    Zheng, Y.-X.
    Lv, J.-F.
    Wang, H.
    Wen, S.-M.
    Huang, L.
    Powiązania:
    https://bibliotekanauki.pl/articles/110351.pdf
    Data publikacji:
    2018
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    lead oxide
    sulfidization roasting
    pyrite
    reaction mechanism
    TG
    Opis:
    A sulfidization roasting-flotation process was usually viewed to be effective in treating the refractory oxide ore. In this paper, pyrite was proposed to be applied as a potential vulcanizing reagent to transform PbO or its surface to PbS based on feasibilities of technology and economy. The evolution process, phase and characteristics of crystal growth were investigated by TG, XRD and SEM-EDS, respectively, to interpret the interaction mechanism of lead oxide and pyrite at high temperature. It was found that the decomposition process of pyrite under argon atmosphere was a slow process of sulfur released from FeS2 to FexS, which made the process easier to be controlled. When PbO was introduced into the system, the initial solid-solid (PbO-FeS2) reaction and prevailing solid-gas (PbO-S2(g)) reaction occurred at about 500 °C and 700 °C, respectively. Combined with the SEM-EDS analyses results, the optimal temperature for the sulfidization of PbO should be in the range of 700-750 °C.
    Źródło:
    Physicochemical Problems of Mineral Processing; 2018, 54, 2; 270-277
    1643-1049
    2084-4735
    Pojawia się w:
    Physicochemical Problems of Mineral Processing
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Electronic System Fault Diagnosis with Optimized Multi-kernel SVM by Improved CPSO
    Diagnoza uszkodzeń układu elektronicznego z wykorzystaniem Wielojądrowej Maszyny Wektorów Nośnych (SVM) zoptymalizowanej przy pomocy poprawionego algorytmu CPSO
    Autorzy:
    Guo, Y. M.
    Wang, X. T.
    Liu, C.
    Zheng, Y. F.
    Cai, X. B.
    Powiązania:
    https://bibliotekanauki.pl/articles/300922.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Polskie Naukowo-Techniczne Towarzystwo Eksploatacyjne PAN
    Tematy:
    układ elektroniczny
    diagnoza uszkodzeń
    maszyna wektorów nośnych
    optymalizacja metodą chaosu-roju cząstek
    funkcja wielojądrowa
    electronic system
    fault diagnosis
    support vector machine (SVM)
    chaos particles swarm optimization
    multi-kernel
    Opis:
    Bezpieczeństwo pracy układów elektronicznych stało się kluczowym zagadnieniem w odniesieniu do złożonych układów o wysokiej niezawodności. Obecnie coraz większy nacisk kładzie się na trafność diagnozy uszkodzeń układów elektronicznych. Na podstawie charakterystyki diagnozy uszkodzeń układów elektronicznych, opracowaliśmy model wielokryterialnej klasyfikacji SVM pozwalający osiągnąć lepszą trafność diagnozy uszkodzeń. Model wykorzystuje funkcję wielojądrową składającą się z kilku bazowych funkcji jądrowych pozwalającą na zwiększenie interpretowalności modelu klasyfikacyjnego. Aby zoptymalizować działanie modelu wielokryterialnej klasyfikacji SVM wykorzystującego funkcję wielojądrową, udoskonaliliśmy algorytm Optymalizacji Metodą Chaosu-Roju Cząstek (CPSO), co pozwoliło osiągnąć optymalne parametry SVM i funkcji wielojądrowej. W poprawionym algorytmie CPSO wzmocniono różnorodność wyszukiwania poprzez wykorzystanie chaotycznej sekwencji generowanej przez zmodyfikowaną mapę tent, a także włączono do standardowego algorytmu PSO efektywną metodę pozwalającą uniknąć przedwczesnej stagnacji oraz uzyskać globalne wartości optymalizacji. Wyniki symulacji diagnozy uszkodzeń systemu elektronicznego pokazują, że proponowany system optymalizacji może być wykorzystywany jako skuteczna metoda umożliwiająca znaczne zwiększenie trafności diagnozy uszkodzeń z wykorzystaniem wielojądrowej SVM.
    Electronic systems’ safety operation has become a key issue to complex and high reliability systems. Now more emphasis has been laid on the accuracy of electronic system fault diagnosis. Based on the characteristics of the electronic system fault diagnosis, we design a multi-classification SVMs model to attain better fault diagnosis accuracy, which utilizes multi-kernel function consisting of several basis kernel functions to enhance the interpretability of the classification model. In order to optimize the performance of multi-classification SVMs with multi-kernel, we improve the Chaos Particles swarm Optimization (CPSO) algorithm to achieve the optimum parameters of SVMs and the multi-kernel function. For the improved CPSO algorithm, a modified Tent Map chaotic sequence is used to strengthen the search diversity, and an effective method is embedded to the stander PSO algorithm which can ensure to avoid premature stagnation and obtain the global optimization values. The fault diagnosis simulation results of an electronic system show the proposed optimization scheme is a feasible and effective method and it can significantly improve the fault diagnosis accuracy of the multi-kernel SVM.
    Źródło:
    Eksploatacja i Niezawodność; 2014, 16, 1; 85-91
    1507-2711
    Pojawia się w:
    Eksploatacja i Niezawodność
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Exploring agent-based wireless business models and decision support applications in an airport environment
    Autorzy:
    Wang, Y.
    Cuthbert, L.
    Mullany, F. J.
    Stathopoulos, P.
    Tountopoulos, V.
    Sotiriou, D. A.
    Mitrou, N.
    Senis, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/308938.pdf
    Data publikacji:
    2004
    Wydawca:
    Instytut Łączności - Państwowy Instytut Badawczy
    Tematy:
    wireless applications
    multi-agent systems
    wireless business models
    wireless SLA
    radio resource management
    Opis:
    This paper describes an intelligent communication and decision support system for providing wireless services in an airport environment. A novel agent-based business model is proposed and the value chain is analysed for wireless applications. This system is studied and developed within the scope of the IST ADAMANT project, where the Athens International Airport (AIA) is used as the trial environment. First of all, a set of advanced, realistic decision support application scenarios enhancing the airport facilities both for the passengers and for the airport staff is identified. Most of the applications can be summarised as location-based personalised services. They refer both to airport internal users and to passenger users. In order to provide these services, location-sensitive service level agreements (SLAs) and radio resource management (RRM) are introduced. The design of such a system is envisaged based on a generic, multi-agent architecture, which is also presented in this paper.
    Źródło:
    Journal of Telecommunications and Information Technology; 2004, 3; 57-64
    1509-4553
    1899-8852
    Pojawia się w:
    Journal of Telecommunications and Information Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Identification, evaluation, and application of the genomic-SSR loci in ramie
    Autorzy:
    Luan, M.-B.
    Yang, Z.-M.
    Zhu, J.-J.
    Deng, X.
    Liu, C.-C.
    Wang, X.-F.
    Xu, Y.
    Sun, Z.-M.
    Chen, J.-H.
    Powiązania:
    https://bibliotekanauki.pl/articles/57981.pdf
    Data publikacji:
    2016
    Wydawca:
    Polskie Towarzystwo Botaniczne
    Opis:
    To provide a theoretical and practical foundation for ramie genetic analysis, simple sequence repeats (SSRs) were identified in the ramie genome and employed in this study. From the 115 369 sequences of a specific-locus amplified fragment library, a type of reduced representation library obtained by high-throughput sequencing, we identified 4774 sequences containing 5064 SSR motifs. SSRs of ramie included repeat motifs with lengths of 1 to 6 nucleotides, and the abundance of each motif type varied greatly. We found that mononucleotide, dinucleotide, and trinucleotide repeat motifs were the most prevalent (95.91%). A total of 98 distinct motif types were detected in the genomic-SSRs of ramie. Of them, The A/T mononucleotide motif was the most abundant, accounting for 41.45% of motifs, followed by AT/TA, accounting for 20.30%. The number of alleles per locus in 31 polymorphic microsatellite loci ranged from 2 to 7, and observed and expected heterozygosities ranged from 0.04 to 1.00 and 0.04 to 0.83, respectively. Furthermore, molecular identity cards (IDs) of the germplasms were constructed employing the ID Analysis 3.0 software. In the current study, the 26 germplasms of ramie can be distinguished by a combination of five SSR primers including Ibg5-5, Ibg3-210, Ibg1-11, Ibg6-468, and Ibg6-481. The allele polymorphisms produced by all SSR primers were used to analyze genetic relationships among the germplasms. The similarity coefficients ranged from 0.41 to 0.88. We found that these 26 germplasms were clustered into five categories using UPGMA, with poor correlation between germplasm and geographical distribution. Our study is the first large-scale SSR identification from ramie genomic sequences. We have further studied the SSR distribution pattern in the ramie genome, and proposed that it is possible to develop SSR loci from genomic data for population genetics studies, linkage mapping, quantitative trait locus mapping, cultivar fingerprinting, and as genetic diversity studies.
    Źródło:
    Acta Societatis Botanicorum Poloniae; 2016, 85, 3
    0001-6977
    2083-9480
    Pojawia się w:
    Acta Societatis Botanicorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Improving Triggering Characteristics for a Surface-Flashover Triggered Vacuum Switch
    Autorzy:
    He, Z.
    Wang, L.
    Li, F.
    Yao, W.
    Dong, M.
    Zhao, C.
    Powiązania:
    https://bibliotekanauki.pl/articles/1807889.pdf
    Data publikacji:
    2009-06
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    52.80.Vp
    52.75.Kq
    52.25.Mq
    Opis:
    A surface-breakdown triggered vacuum switch with parallel disk electrodes and semiconductor surface flashover trigger electrode has many advantages, it is easy to be triggered and machined. The resistance of the trigger gap has been increased in terms of modifying the thickness of the semiconductor layer and improving coating process technology. The trigger gap resistance, trigger voltage and trigger waveforms were experimentally tested. The results show that the triggering characteristics can be improved by increasing the trigger resistance.
    Źródło:
    Acta Physica Polonica A; 2009, 115, 6; 1019-1021
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Investigation of a selectable multi-passband microwave photonic filter based on cascaded optical comb filters
    Autorzy:
    Wang, F.
    Peng, M. M.
    Powiązania:
    https://bibliotekanauki.pl/articles/2033940.pdf
    Data publikacji:
    2021
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    microwave photonic filter
    multi-passband filter
    microwave signal processing
    Opis:
    A multi-passband microwave photonic filter (MPF) with selectable passband frequency, spanning 0-20 GHz frequency range, is proposed, and experimentally demonstrated, in which passband frequency can be flexibly selected within a maximum passband number to four. The scheme is based on the generation of tunable optical comb lines using a broadband optical source sliced by cascaded optical comb filters, achieved by connecting an in-line birefringence fiber filter and a reconfigurable Lyot filter in series, such that various filter tap spacing and spectral combinations are obtained for the configuration of the MPF. The proposed MPF can operate with four different passband states, namely, single-, dual-, triple-, and quadruple-passband, only by adjusting polarization states of the cascaded optical comb filters. All these passbands are with a 3-dB bandwidth varying from 200 to 460 MHz and more than 20-dB sidelobe suppression.
    Źródło:
    Optica Applicata; 2021, 51, 3; 457-467
    0078-5466
    1899-7015
    Pojawia się w:
    Optica Applicata
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Isolation and sequence analysis of the complete VP2 gene of canine parvovirus from Chinese domestic pets and determination of the pathogenesis of these circulating strains in beagles
    Autorzy:
    Chen, M.R.
    Guo, X.Y.
    Wang, Z.Y.
    Jiang, Y.T.
    Yuan, W.F.
    Xin, T.
    Hou, S.H.
    Song, T.Q.
    Lin, W.D.
    Zhu, H.F.
    Jia, H.
    Powiązania:
    https://bibliotekanauki.pl/articles/2087542.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    canine parvovirus
    molecular epidemiology
    phylogenetic analysis
    pathogenesis
    Źródło:
    Polish Journal of Veterinary Sciences; 2019, 2; 287-296
    1505-1773
    Pojawia się w:
    Polish Journal of Veterinary Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Rapid screening of monoclonal antibodies against porcine circovirus type 2 using colloidal gold-based paper test
    Autorzy:
    Jin, Q.Y.
    Feng, L.L.
    Wang, Y.B.
    Li, P.
    Yang, J.F.
    Teng, M.
    Chai, S.J.
    Xing, G.X.
    Zhang, G.P.
    Powiązania:
    https://bibliotekanauki.pl/articles/16539073.pdf
    Data publikacji:
    2022
    Wydawca:
    Polska Akademia Nauk. Czasopisma i Monografie PAN
    Tematy:
    porcine circovirus type 2 (PCV2)
    screening of MAbs
    paper test
    Opis:
    A proof of concept for using paper test as a suitable method in the production of monoclonal antibodies (MAbs) is reported. The paper test which detects antibodies against porcine circovirus type 2 (PCV2) using colloidal gold-labelled capsid protein as the antigen probe was applied exclusively in the screening of anti-PCV2 MAbs. It allowed the detection of 118 single cell clones within 30 min using naked eyes. MAbs with specific binding to authentic epitopes on the virus were selected using a blocking strategy in which the antibody was pre-incubated with PCV2 viral sample before applying to the test paper. Five hybridomas secreting MAbs against the capsid protein were obtained, with only three of them capable of binding to PCV2. The results were validated and confirmed using enzyme-linked immunosorbent assay and immunofluorescence assay. The paper test is simple, rapid, and independent on professional technicians and proves to be an excellent approach for the screening of MAbs against specific targets.
    Źródło:
    Polish Journal of Veterinary Sciences; 2022, 25, 1; 27-34
    1505-1773
    Pojawia się w:
    Polish Journal of Veterinary Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Ship recognition and tracking system for intelligent ship based on deep learning framework
    Autorzy:
    Liu, B.
    Wang, S. Z.
    Xie, Z. X.
    Zhao, J. S.
    Li, M. F.
    Powiązania:
    https://bibliotekanauki.pl/articles/117419.pdf
    Data publikacji:
    2019
    Wydawca:
    Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
    Tematy:
    intelligent ship
    deep learning framework
    ship recognition system
    ship tracking system
    ship recognition and tracking system
    intelligent navigation
    autonomous ship
    maritime safety
    Opis:
    Automatically recognizing and tracking dynamic targets on the sea is an important task for intelligent navigation, which is the prerequisite and foundation of the realization of autonomous ships. Nowadays, the radar is a typical perception system which is used to detect targets, but the radar echo cannot depict the target’s shape and appearance, which affects the decision-making ability of the ship collision avoidance. Therefore, visual perception system based on camera video is very useful for further supporting the autonomous ship navigational system. However, ship’s recognition and tracking has been a challenge task in the navigational application field due to the long distance detection and the ship itself motion. An effective and stable approach is required to resolve this problem. In this paper, a novel ship recognition and tracking system is proposed by using the deep learning framework. In this framework, the deep residual network and cross-layer jump connection policy are employed to extract the advanced ship features which help enhance the classification accuracy, thus improves the performance of the object recognition. Experimentally, the superiority of the proposed ship recognition and tracking system was confirmed by comparing it with state of-the-art algorithms on a large number of ship video datasets.
    Źródło:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2019, 13, 4; 699-705
    2083-6473
    2083-6481
    Pojawia się w:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Software Startups – A Research Agenda
    Autorzy:
    Unterkalmsteiner, M.
    Abrahamsson, P.
    Wang, X. F.
    Nguyen-Duc, A.
    Shah, S.
    Bajwa, S. S.
    Baltes, G. H.
    Conboy, K.
    Cullina, E.
    Dennehy, D.
    Edison, H.
    Fernandez-Sanchez, C
    Garbajosa, J.
    Gorschek, T.
    Klotins, E.
    Hokkanen, L.
    Kon, F.
    Lunesu, I.
    Marchesi, M.
    Morgan, L.
    Oivo, M.
    Selig, C.
    Seppänen, P.
    Sweetman, R.
    Tyrväinen, P.
    Ungerer, C.
    Yagüe, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/953060.pdf
    Data publikacji:
    2016
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    software startup
    research agenda
    software-intensive systems
    Opis:
    Software startup companies develop innovative, software-intensive products within limited time frames and with few resources, searching for sustainable and scalable business models. Software startups are quite distinct from traditional mature software companies, but also from micro-, small-, and medium-sized enterprises, introducing new challenges relevant for software engineering research. This paper’s research agenda focuses on software engineering in startups, identifying, in particular, 70+ research questions in the areas of supporting startup engineering activities, startup evolution models and patterns, ecosystems and innovation hubs, human aspects in software startups, applying startup concepts in non-startup environments, and methodologies and theories for startup research. We connect and motivate this research agenda with past studies in software startup research, while pointing out possible future directions. While all authors of this research agenda have their main background in Software Engineering or Computer Science, their interestin software startups broadens the perspective to the challenges, but also to the opportunities that emerge from multi-disciplinary research. Our audience is therefore primarily software engineering researchers, even though we aim at stimulating collaborations and research that crosses disciplinary boundaries. We believe that with this research agenda we cover a wide spectrum of the software startup industry current needs.
    Źródło:
    e-Informatica Software Engineering Journal; 2016, 10, 1; 89-123
    1897-7979
    Pojawia się w:
    e-Informatica Software Engineering Journal
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
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