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    Wyświetlanie 1-11 z 11
    Tytuł:
    Supposed maximum mutual information for improving generalization and interpretation of multi-layered neural networks
    Autorzy:
    Kamimura, Ryotaro
    Powiązania:
    https://bibliotekanauki.pl/articles/91604.pdf
    Data publikacji:
    2019
    Wydawca:
    Społeczna Akademia Nauk w Łodzi. Polskie Towarzystwo Sieci Neuronowych
    Tematy:
    mutual information
    disentanglement
    generalization
    interpretation
    Opis:
    The present paper1 aims to propose a new type of information-theoretic method to maximize mutual information between inputs and outputs. The importance of mutual information in neural networks is well known, but the actual implementation of mutual information maximization has been quite difficult to undertake. In addition, mutual information has not extensively been used in neural networks, meaning that its applicability is very limited. To overcome the shortcoming of mutual information maximization, we present it here in a very simplified manner by supposing that mutual information is already maximized before learning, or at least at the beginning of learning. The method was applied to three data sets (crab data set, wholesale data set, and human resources data set) and examined in terms of generalization performance and connection weights. The results showed that by disentangling connection weights, maximizing mutual information made it possible to explicitly interpret the relations between inputs and outputs.
    Źródło:
    Journal of Artificial Intelligence and Soft Computing Research; 2019, 9, 2; 123-147
    2083-2567
    2449-6499
    Pojawia się w:
    Journal of Artificial Intelligence and Soft Computing Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    CMIM-2: An Enhanced Conditional Mutual Information Maximization Criterion for Feature Selection
    Autorzy:
    Vergara, J. R.
    Estévez, P. A.
    Powiązania:
    https://bibliotekanauki.pl/articles/108783.pdf
    Data publikacji:
    2010
    Wydawca:
    Społeczna Akademia Nauk w Łodzi
    Tematy:
    feature selection
    conditional mutual information
    information theory
    relevance
    redundancy
    Opis:
    A new greedy feature selection criterion is proposed as an enhancement of the conditional mutual information maximization criterion (CMIM). The new criterion, called CMIM-2, allows detecting relevant features that are complementary in the class prediction better than the original criterion. In addition, we present a methodology to approximate the conditional mutual information to spaces of three variables, avoiding its estimation in high-dimensional spaces. Experimental results for artificial and UCI benchmark datasets show that the proposed criterion outperforms the original CMIM criterion.
    Źródło:
    Journal of Applied Computer Science Methods; 2010, 2 No. 1; 5-20
    1689-9636
    Pojawia się w:
    Journal of Applied Computer Science Methods
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Optimizing information processing in brain-inspired neural networks
    Autorzy:
    Paprocki, B.
    Pregowska, A.
    Szczepanski, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/202095.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    neural network
    entropy
    mutual information
    noise
    inhibitory neuron
    Opis:
    The way brain networks maintain high transmission efficiency is believed to be fundamental in understanding brain activity. Brains consisting of more cells render information transmission more reliable and robust to noise. On the other hand, processing information in larger networks requires additional energy. Recent studies suggest that it is complexity, connectivity, and function diversity, rather than just size and the number of neurons, that could favour the evolution of memory, learning, and higher cognition. In this paper, we use Shannon information theory to address transmission efficiency quantitatively. We describe neural networks as communication channels, and then we measure information as mutual information between stimuli and network responses. We employ a probabilistic neuron model based on the approach proposed by Levy and Baxter, which comprises essential qualitative information transfer mechanisms. In this paper, we overview and discuss our previous quantitative results regarding brain-inspired networks, addressing their qualitative consequences in the context of broader literature. It is shown that mutual information is often maximized in a very noisy environment e.g., where only one-third of all input spikes are allowed to pass through noisy synapses and farther into the network. Moreover, we show that inhibitory connections as well as properly displaced long-range connections often significantly improve transmission efficiency. A deep understanding of brain processes in terms of advanced mathematical science plays an important role in the explanation of the nature of brain efficiency. Our results confirm that basic brain components that appear during the evolution process arise to optimise transmission performance.
    Źródło:
    Bulletin of the Polish Academy of Sciences. Technical Sciences; 2020, 68, 2; 225-233
    0239-7528
    Pojawia się w:
    Bulletin of the Polish Academy of Sciences. Technical Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Objective Video Quality Method Based on Mutual Information and Human Visual System
    Autorzy:
    Mardiak, M.
    Polec, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/227280.pdf
    Data publikacji:
    2012
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    objective video quality
    HVS
    mutual information
    VQM
    SSIM
    PSNR
    Opis:
    In this paper we present the objective video quality metric based on mutual information and Human Visual System. The calculation of proposed metric consists of two stages. In the first stage of quality evaluation whole original and test sequence are pre-processed by the Human Visual System. In the second stage we calculate mutual information which has been utilized as the quality evaluation criteria. The mutual information was calculated between the frame from original sequence and the corresponding frame from test sequence. For this testing purpose we choose Foreman video at CIF resolution. To prove reliability of our metric were compared it with some commonly used objective methods for measuring the video quality. The results show that presented objective video quality metric based on mutual information and Human Visual System provides relevant results in comparison with results of other objective methods so it is suitable candidate for measuring the video quality.
    Źródło:
    International Journal of Electronics and Telecommunications; 2012, 58, 2; 145-152
    2300-1933
    Pojawia się w:
    International Journal of Electronics and Telecommunications
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Intracranial EEG Evaluation of a Resting State Network
    Autorzy:
    Duncan, D.
    Duckrow, R. B.
    Coifman, R. R.
    Zaveri, H. P.
    Powiązania:
    https://bibliotekanauki.pl/articles/115588.pdf
    Data publikacji:
    2010
    Wydawca:
    Fundacja na Rzecz Młodych Naukowców
    Tematy:
    Resting State Networks
    Mutual Information
    correlation
    Epilepsy
    Intracranial EEG
    Opis:
    The study of brain networks is based, to a large extent, on pairwise measurements of relationships. Such pairwise relationships can be estimated from brain electrical activity measured from the scalp with routine EEG, from intracranial electrodes during monitoring for epilepsy surgery, or with functional MRI (fMRI) measurements. Here we focus on the study of brain networks through the measurement of pairwise relationships in brain electrical activity as measured by intracranial EEGs. Intracranial EEG data from 11 patients were tested for the presence of relationships which would confi rm or disconfi rm the presence of a resting state network which has previously been observed with fMRI. Mutual information was used as a measure of relationship.
    Źródło:
    Challenges of Modern Technology; 2010, 1, 1; 27-29
    2082-2863
    2353-4419
    Pojawia się w:
    Challenges of Modern Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Mutual information based registration of brain images
    Autorzy:
    Kuczyński, K.
    Mikołajczak, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/332963.pdf
    Data publikacji:
    2002
    Wydawca:
    Uniwersytet Śląski. Wydział Informatyki i Nauki o Materiałach. Instytut Informatyki. Zakład Systemów Komputerowych
    Tematy:
    rejestracja obrazu
    wzajemne informowanie
    podobieństwo pomiaru
    image registration
    mutual information
    similarity measure
    Opis:
    Registration is one of the essential medical image processing techniques. The goal is to find a geometric transformation, that relates corresponding voxels in two different 3D images of the same object. The publication presents a registration technique based on maximization of mutual information.
    Źródło:
    Journal of Medical Informatics & Technologies; 2002, 3; MI213-219
    1642-6037
    Pojawia się w:
    Journal of Medical Informatics & Technologies
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A platform for joint analysis of biosignals ensembles in real-time using FPGA
    Platforma do analizy całości biosygnałów za pomocą FPGA
    Autorzy:
    Mierzejewski, K.
    Véjar, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/261470.pdf
    Data publikacji:
    2016
    Wydawca:
    Politechnika Wrocławska. Wydział Podstawowych Problemów Techniki. Katedra Inżynierii Biomedycznej
    Tematy:
    biosignals
    joint analysis
    mutual information
    DSP
    FPGA
    biosygnały
    zintegrowana analiza
    informacja wzajemna
    Cyfrowe Przetwarzanie Sygnałów
    programowalne układy cyfrowe
    Opis:
    We present the design of a platform for acquisition and digital processing of biosignals. The objective of this platform is to process biosignals in real-time to obtain quantitative indicators for joint analysis of biosignals ensembles. An important indicator of non-linear dependence between signals is the mutual information. The estimation of the mutual information between signals is time- and resource-consuming when using standard software implementations on normal computers. To circumvent the calculation limitations on standard software implementations we use a reconfigurable computing unit of type FPGA, were the calculation of mutual information is specified in hardware.
    Przedstawiamy projekt platformy służącej do pozyskiwania i cyfrowej obróbki biosygnałów. Jej zadaniem jest przetwarzanie biosygnałów w czasie rzeczywistym w celu uzyskania wskaźników ilościowych dla zintegrowanej analizy zespółów biosygnałów. Ważnym wskaźnikiem nieliniowej zależności pomiędzy sygnałami jest informacja wzajemna. Jej oszacowanie pomiędzy sygnałami przy użyciu standardowego oprogramowania na zwykłych komputerach jest mało wydajne i czasochłonne. Aby obejść ograniczenia narzucone przez narzędzia zwykle wykorzystywane w tym celu, zastosowano rekonfigurowalną jednostkę typu FPGA, w której obliczenia informacji wzajemnej są określone.
    Źródło:
    Acta Bio-Optica et Informatica Medica. Inżynieria Biomedyczna; 2016, 22, 4; 253-260
    1234-5563
    Pojawia się w:
    Acta Bio-Optica et Informatica Medica. Inżynieria Biomedyczna
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The possibility of using pseudo-phase space methods in the analysis of the positive displacement pump wear
    Możliwość wykorzystania metody pseudoprzestrzeni fazowej w analizie zużycia elementów pompy wyporowej
    Autorzy:
    Stojek, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/368889.pdf
    Data publikacji:
    2012
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
    Tematy:
    positive-displacement pump
    mutual information
    pseudo-phase space method
    diagnostic of machines
    pompa wyporowa
    informacja wzajemna
    metoda pseudoprzestrzeni fazowej
    diagnostyka maszyn
    Opis:
    In this paper the possibility of tracking the evolution of reconstructed pseudo-phase portraits in the diagnosis of positive-displacement pump wear has been presented. The reconstructed pseudo-phase portraits were obtained from vibration signals measured in characteristic places on the pump casing and from the dynamic pressure graphs recorded in the output port of the pump during the passive test experiment. The recorded measurement concerned to tree state of pump condition: in full working order, in part working order and pump with wear out elements.
    W artykule przedstawiono możliwość wykorzystania odtworzonych z zarejestrowanych sygnałów przebiegów pseudoportretów fazowych w diagnostyce zużycia pomp wyporowych na przykładzie badań pompy wielotłoczkowej. Odtworzone pseudoportrety fazowe otrzymano w wyniku przeprowadzenia biernego eksperymentu diagnostycznego, ze zmierzonych w charakterystycznych miejscach korpusu pompy sygnałów wibracji oraz dodatkowo z przebiegów ciśnienia dynamicznego dla trzech stanów pracy pompy: pełnej sprawności, stanu częściowej sprawności oraz pracy pompy zużytej.
    Źródło:
    Mechanics and Control; 2012, 31, 3; 115-123
    2083-6759
    2300-7079
    Pojawia się w:
    Mechanics and Control
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    On the 0/1 test for chaos in continuous systems
    Autorzy:
    Melosik, M.
    Marszalek, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/200037.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    test 0/1 for chaos
    oversampling
    phase space reconstruction
    mutual information
    FFT
    test 0-1 dla układów dynamicznych
    chaos
    faza przebudowy przestrzeni
    wzajemne przekazywanie informacji
    Opis:
    In this paper we discuss in detail the resonance and oversampling features of the 0/1 test for chaos in continuous systems and propose methods to avoid those undesired features. Our method is based on certain frequency properties of the 0/1 test. When reconstructing the phase space, our approach is compared with the first minimum of the mutual information method. Several numerical results for typical chaotic systems (including memristive circuits) are included.
    Źródło:
    Bulletin of the Polish Academy of Sciences. Technical Sciences; 2016, 64, 3; 521-528
    0239-7528
    Pojawia się w:
    Bulletin of the Polish Academy of Sciences. Technical Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Research on information content of light field on the image plane illuminated by incoherent light source
    Autorzy:
    Cai, Xiao-ou
    Lai, Xian-jing
    Wang, Hui
    Powiązania:
    https://bibliotekanauki.pl/articles/173681.pdf
    Data publikacji:
    2019
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    information content
    mutual intention
    degree of freedom
    coherent wavelet source
    independent coherent signal
    Opis:
    A novel approach for the measurement of information content of light field on the image plane illuminated by an incoherent light source has been proposed according to Shannon’s information theory. We put forward a hypothetical concept named "coherent wavelet source" on an incoherent light source which can form an independent coherent signal on the object surface based on the expression of mutual intensity on the object surface. As a result, the number of independent coherent signals on the object surface can be made out by dividing the whole illumination source on a coherent wavelet source size. Meanwhile, the maximum number of degree of freedom of light field which can reach the image plane is given based on the structure of imaging system. Concrete algorithm for the information content of the imaging light illuminated by a 1D linear light source and a 2D circular light source are presented.
    Źródło:
    Optica Applicata; 2019, 49, 2; 265-273
    0078-5466
    1899-7015
    Pojawia się w:
    Optica Applicata
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Maritime security and threat assessments
    Autorzy:
    Eidnes, I. M.
    Batalden, B. M.
    Sydnes, M. K.
    Powiązania:
    https://bibliotekanauki.pl/articles/116477.pdf
    Data publikacji:
    2019
    Wydawca:
    Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
    Tematy:
    maritime security
    DNK-Norwegian Shipowners Mutual War Risks Insurance Association
    security intelligence information
    Company Security Officer (CSO)
    Analysis of Variance (ANOVA)
    Norwegian Maritime Companies
    threat assessment
    risk assessment
    Opis:
    Maritime security is still a challenge in international trade. In this case-study we analyze how the Norwegian Shipowners’ Mutual War Risks Insurance Association (DNK) provides Norwegian maritime companies with regional assessments of threat-levels. Through a survey and a series of interviews, we study factors that affect the communication and perception of threats, in addition to how maritime companies make security decisions regarding operating in different areas. The study concludes that the DNK and maritime companies largely have a common assessment of threat levels. Though communication between DNK and its member companies has challenges, the members largely consider DNK threat assessments to be reliable. Security decisions in maritime companies typically involve multiple actors, considerations of economy versus security, and multiple sources of security intelligence information.
    Źródło:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2019, 13, 4; 707-714
    2083-6473
    2083-6481
    Pojawia się w:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-11 z 11

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