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    Wyświetlanie 1-17 z 17
    Tytuł:
    Bulbospinal catecholamine neurones and sympathetic pattern generation
    Autorzy:
    Coote, J H
    Lewis, D.I.
    Powiązania:
    https://bibliotekanauki.pl/articles/70075.pdf
    Data publikacji:
    1995
    Wydawca:
    Polskie Towarzystwo Fizjologiczne
    Tematy:
    catecholamine neuron
    sympathetic pattern generation
    brain tissue
    preganglionic neuron
    dopamine
    noradrenaline
    cardiovascular system
    rat
    Źródło:
    Journal of Physiology and Pharmacology; 1995, 46, 3
    0867-5910
    Pojawia się w:
    Journal of Physiology and Pharmacology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Laser Metal Deposition and Wire Arc Additive Manufacturing of Materials: An Overview
    Autorzy:
    Rumman, R.
    Lewis, D. A.
    Hascoet, J. Y.
    Quinton, J. S.
    Powiązania:
    https://bibliotekanauki.pl/articles/352724.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    additive manufacturing
    laser metal deposition
    wire arc
    microstructure
    Opis:
    Additive manufacturing (AM) is a process that joins similar or dissimilar materials into application-oriented objects in a wide range of sizes and shapes. This article presents an overview of two additive manufacturing techniques; namely Laser metal deposition (LMD) and Wire arc additive manufacturing (WAAM). In LMD, metallic powders are contained in one or more chambers, which are then channelled through deposition nozzles. A laser heats the particles to produce metallic beads, which are deposited in layers with the aid of an in-built motion system. In WAAM, a high voltage electric arc functions as the heat source, which helps with ensuring deposition of materials, while materials in wire form are used for the feedstock. This article highlights some of the strengths and challenges that are offered by both processes. As part of the authors’ original research work, Ti-6Al-4V, Stainless steel 316L and Al-12Si were prepared using LMD, while the WAAM technique was used to prepare two Al alloys; Al-5356 and CuAl8Ni2. Microstructural analysis will focus on similarity and differences in grains that are formed in layers. This article will also offer an overall comparison on how these samples compare with other materials that have been prepared using LMD and WAAM.
    Źródło:
    Archives of Metallurgy and Materials; 2019, 64, 2; 467-473
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Graded hyponymy for compositional distributional semantics
    Autorzy:
    Bankova, D.
    Coecke, B.
    Lewis, M.
    Marsden, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/103883.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Instytut Podstaw Informatyki PAN
    Tematy:
    categorical semantics
    compositional semantics
    distributional semantics
    computational linguistics
    entailment
    density operator
    Opis:
    The categorical compositional distributional model of natural language provides a conceptually motivated procedure to compute the meaning of a sentence, given its grammatical structure and the meanings of its words. This approach has outperformed other models in mainstream empirical language processing tasks, but lacks an effective model of lexical entailment. We address this shortcoming by exploiting the freedom in our abstract categorical framework to change our choice of semantic model. This allows us to describe hyponymy as a graded order on meanings, using models of partial information used in quantum computation. Quantum logic embeds in this graded order.
    Źródło:
    Journal of Language Modelling; 2018, 6, 2; 225-260
    2299-856X
    2299-8470
    Pojawia się w:
    Journal of Language Modelling
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    On the Choice of Subspace for Iterative Methods for Linear Discrete Ill-Posed Problems
    Autorzy:
    Calvetti, D.
    Lewis, B.
    Reichel, L.
    Powiązania:
    https://bibliotekanauki.pl/articles/908057.pdf
    Data publikacji:
    2001
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    metoda sprzężonych gradientów
    problem niewłaściwie postawiony
    minimal residual method
    conjugate gradient method
    ill-posed problems
    Opis:
    Many iterative methods for the solution of linear discrete ill-posed problems with a large matrix require the computed approximate solutions to be orthogonal to the null space of the matrix. We show that when the desired solution is not smooth, it may be possible to determine meaningful approximate solutions with less computational work by not imposing this orthogonality condition.
    Źródło:
    International Journal of Applied Mathematics and Computer Science; 2001, 11, 5; 1069-1092
    1641-876X
    2083-8492
    Pojawia się w:
    International Journal of Applied Mathematics and Computer Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Online learning algorithm for zero-sum games with integral reinforcement learning
    Autorzy:
    Vamvoudakis, K. G.
    Vrabie, D.
    Lewis, F. L.
    Powiązania:
    https://bibliotekanauki.pl/articles/91780.pdf
    Data publikacji:
    2011
    Wydawca:
    Społeczna Akademia Nauk w Łodzi. Polskie Towarzystwo Sieci Neuronowych
    Tematy:
    learning
    online algorithm
    zero-sum game
    game
    infinite horizon
    Hamilton-Jacobi-Isaacs equation
    approximation network
    optimal value function
    adaptive control tuning algorithm
    Nash solution
    Opis:
    In this paper we introduce an online algorithm that uses integral reinforcement knowledge for learning the continuous-time zero sum game solution for nonlinear systems with infinite horizon costs and partial knowledge of the system dynamics. This algorithm is a data based approach to the solution of the Hamilton-Jacobi-Isaacs equation and it does not require explicit knowledge on the system’s drift dynamics. A novel adaptive control algorithm is given that is based on policy iteration and implemented using an actor/ disturbance/critic structure having three adaptive approximator structures. All three approximation networks are adapted simultaneously. A persistence of excitation condition is required to guarantee convergence of the critic to the actual optimal value function. Novel adaptive control tuning algorithms are given for critic, disturbance and actor networks. The convergence to the Nash solution of the game is proven, and stability of the system is also guaranteed. Simulation examples support the theoretical result.
    Źródło:
    Journal of Artificial Intelligence and Soft Computing Research; 2011, 1, 4; 315-332
    2083-2567
    2449-6499
    Pojawia się w:
    Journal of Artificial Intelligence and Soft Computing Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Detecting epileptogenesis in power variant domains
    Autorzy:
    Lewis, R. A.
    Parks, B.
    Shmueli, D.
    Capinst, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/206373.pdf
    Data publikacji:
    2011
    Wydawca:
    Polska Akademia Nauk. Instytut Badań Systemowych PAN
    Tematy:
    intracortical electroencephalograms automata
    epilepsy
    Fourier transforms
    rough sets
    Opis:
    This paper presents the merging of two sets of experiments in the continuing endeavor to mine epileptiform activity from Electroencephalograms (EEG). The goal is to develop robust classification rules for identifying epileptiform activity in the human brain. We present advancements using the author's proprietary developed spectral analysis software to link power spectra of rat EEGs experiencing epilepsy seizures with the authors DFA algorithm and their MATLAB spectral analysis. Our system links 1) power spectra of seizures, in sleep, spike and seizure states, with 2) Deterministic Finite Automata (DFA). Combining power spectra with DFA to correctly predict and identify epileptiform activity (spikes) and epileptic seizures opens the door to creating classifiers for seizures. We also present a DFA that separates the states between seizure and nonseizure using robust testing and additional algorithms to increase the rigor when the methodology analyses noisy signals. Our results show optimal identification of seizures even when significant artifact and noise is present in the polyphonic domain. Herein we present a dual methodology that increases epileptoid identification in a noisy domain that links time and frequency domain components from MATLAB and proprietary software to clinical epileptiform activity.
    Źródło:
    Control and Cybernetics; 2011, 40, 2; 293-314
    0324-8569
    Pojawia się w:
    Control and Cybernetics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Gwiazda Afryki : Hans Marseille - niepokorny as Luftwaffe
    Star of Africa : the story of Hans Marseille the rouge Luftwaffe ace who dominated the WWII skies, 2012
    Hans Marseille - niepokorny as Luftwaffe
    Autorzy:
    Heaton, Colin D. (1962- ).
    Lewis, Anne-Marie (1968- ).
    Współwytwórcy:
    Golowanow, Łukasz. Tłumaczenie
    Wydawnictwo Replika.
    Data publikacji:
    2014
    Wydawca:
    Zakrzewo : Wydawnictwo Replika
    Tematy:
    Marseille, Hans-Joachim (1919-1942)
    Piloci wojskowi Niemcy 1933 -1945 r.
    Wojna powietrzna
    Biografia
    Opis:
    Tyt. oryg.: "The star of Africa : the story of Hans Marseille the rouge Luftwaffe ace who dominated the WWII skies" 2012.
    Bibliogr. s. 331-332. Indeks.
    Dostawca treści:
    Bibliografia CBW
    Książka
      Wyświetlanie 1-17 z 17

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