582 research outputs found
Derivation of the hydrodynamical equation for one-dimensional Ginzburg-Landau model
No full textFunaki, T.. (1987). Derivation of the hydrodynamical equation for one-dimensional Ginzburg-Landau model. Retrieved from the University Digital Conservancy, https://hdl.handle.net/11299/4668
On some Fourier aspects of the construction of certain Wiener integrals
No full textThe existence and best L2-bounds for the Wiener type integrals , where X ranges through a wide class of Bessel-like centered processes, and f belongs to L2([0,1]), are discussed in terms of Fourier transforms associated with some characteristics of X, thus providing some unification of previous results on this topic obtained by the authors [T. Funaki, Y. Hariya, M. Yor, Wiener integrals for centered powers of Bessel processes, I, Markov Processes and their Related Fields (2006) (in press), T. Funaki, Y. Hariya, F. Hirsch, M. Yor, On the construction of Wiener integrals with respect to certain pseudo-Bessel processes, Stochastic Processes and their Applications (2006) (in press)] as well as yielding new results.Wiener integrals Quadratic forms Tempered distributions Optimal bounds
On the construction of Wiener integrals with respect to certain pseudo-Bessel processes
No full textIn previous papers [T. Funaki, Y. Hariya, M. Yor, Wiener integrals for centered powers of Bessel processes, I, Markov Processes Related Fields (2006) (in press); T. Funaki, Y. Hariya, M. Yor, Wiener integrals for centered Bessel and related processes, II, Alea (2006) (in press)], the authors have shown that it is possible to define the Wiener-type integrals , for every and any centered Bessel process with dimension d>1. In this paper, various conditions are stated, showing that such a construction is possible for a large class of processes indexed by two square integrable Brownian functionals. In particular, some of the results previously obtained for the Bessel processes are thus recovered, and in fact shown to extend to certain processes of the form .Bessel processes Ito's representation theorem Wiener integrals Scaling property Gebelein's inequality Hermite and Laguerre series expansions
On the construction of Wiener integrals with respect to certain pseudo-Bessel processes
No full textAbstractIn previous papers [T. Funaki, Y. Hariya, M. Yor, Wiener integrals for centered powers of Bessel processes, I, Markov Processes Related Fields (2006) (in press); T. Funaki, Y. Hariya, M. Yor, Wiener integrals for centered Bessel and related processes, II, Alea (2006) (in press)], the authors have shown that it is possible to define the Wiener-type integrals ∫01h(s)dR¯s, for every h∈L2([0,1],ds) and (R¯s) any centered Bessel process with dimension d>1. In this paper, various conditions are stated, showing that such a construction is possible for a large class of processes indexed by two square integrable Brownian functionals. In particular, some of the results previously obtained for the Bessel processes are thus recovered, and in fact shown to extend to certain processes of the form tf(Rtt)
Fast-reaction limit for Glauber-Kawasaki dynamics with two components
No full textWe consider the Kawasaki dynamics of two types of particles under a killing effect on a d-dimensional square lattice. Particles move with possibly different jump rates depending on their types. The killing effect acts when particles of different types meet at the same site. We show the existence of a limit under the diffusive space-time scaling and suitably growing killing rate: segregation of distinct types of particles does occur, and the evolution of the interface between the two distinct species is governed by the two-phase Stefan problem. We apply the relative entropy method and combine it with some PDE techniques
Visualization of dynamic noise current distribution from Si and SiC power devices based on time-synchronized near magnetic field scanning
No full textT. Ibuchi and T. Funaki, "Visualization of dynamic noise current distribution from Si and SiC power devices based on time-synchronized near magnetic field scanning," 2020 International Symposium on Electromagnetic Compatibility - EMC EUROPE, Rome, Italy, 2020, pp. 1-6, doi: 10.1109/EMCEUROPE48519.2020.9245654.This report studies the visualization of dynamic noise current distribution in switching operation of Si and SiC power devices. The measurement system is developed to identify time-dependent near magnetic field distribution for periodic steady state circuit operation. The experimental results shown in this report demonstrate the usefulness of the developed system to identify the EMI noise generation and to visualize the time variation of noise current distribution in the power conversion circuit
A study on EMI noise source modeling with voltage source in synchronous DC-DC buck converter
No full textY. Saito, T. Ibuchi, T. Funaki, K. Kawai and T. Tsuda, "A study on EMI noise source modeling with voltage source in synchronous DC-DC buck converter," 2020 IEEE 11th International Symposium on Power Electronics for Distributed Generation Systems (PEDG), Dubrovnik, Croatia, 2020, pp. 470-475, doi: 10.1109/PEDG48541.2020.9244423.This paper studies electromagnetic interference noise source modeling with voltage source for electromagnetic compatibility design of synchronous DC-DC buck converter. The transient response of switching node voltage contains surge and ringing oscillation which can be attained by solving differential equation of power loop equivalent circuit model in the tested converter
The Core of a Normal Form Game
No full textDue to the externalities, in normal form games a deviation changes the payoff of all players inducing a retaliation by the remaining or residual players. The stability of an outcome depends on the expectations potential deviators have about this reaction, but so far no satisfactory theory has been provided. The present paper continues the work of Chander and Tulkens (1997) where deviators consider residual equilibria, but we allow coalitions to form, moreover introduce consistency between the residual solution and the solution of the original game. Optimistic and pessimistic considerations produce a pair of cores. These cores are compared to some existing cooperative concepts such as the gamma- and r-cores and the equilibrium binding agreements. In our final section we discuss the predominance of the grand coalition and suggest a generalisation of the normal form where such a precedence can be removed.externalities, residual game, cohesiveness, partition function
A modular approach to large-signal modeling of an interconnected AC/MTDC system
No full textY. Susuki, N. Kawamoto, Y. Ohashi, A. Ishigame, T. Funaki and S. D’Arco, "A Modular Approach to Large-Signal Modeling of an Interconnected AC/MTDC System," 2020 IEEE PES Innovative Smart Grid Technologies Europe (ISGT-Europe), The Hague, Netherlands, 2020, pp. 945-949, doi: 10.1109/ISGT-Europe47291.2020.9248890.The so-called modular modeling of interconnected AC/MTDC (Multi-Terminal DC) systems aids their synthesis and analysis by decomposing it into structural modules (e.g. voltage-source converter, synchronous generator, AC line, DC line) and by exploring the patterns of interconnection that yield the overall performance of a system. In this paper, we introduce our idea on the modular modeling of large-signal dynamics for an interconnected AC/MTDC system. Effectiveness of the idea is shown with numerical simulations for a relatively simple configuration of three-terminal DC grid
CLUSTER STRUCTURES IN 3/2<sup>-</sup> AND 1/2<sup>+</sup> STATES OF <sup>11</sup><font>B</font>
No full text Cluster structures of 3/2- and 1/2+ states in 11 B are investigated with a semi-microscopic α + α + t cluster model based on the Gaussian expansion method. The [Formula: see text] state, characterized by the monopole transition strength as large as the Hoyle state ([Formula: see text] at Ex = 7.65 MeV in 12 C ), was found to have a loosely bound α+α+t cluster structure, although its features is not similar to those of the Hoyle state with the dilute 3α-condensate-like character (0Sα)3, in which the α particle is occupied in a single 0S-orbit with about 70% probability. We indicate that the 12.56-MeV state (Jπ = 1/2+) around the α + α +t threshold observed in the 7 Li (7 Li ,11 B *)t reaction etc. is a strong candidate for the Hoyle-analogue state with the main configuration of (0Sα)2(0St) from the analyses of the single-cluster motions in 11 B . </jats:p
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