The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
We introduce TiMDPpoly, an algorithm designed to solve planning problems with durative actions, under probabilistic uncertainty, in a non-stationary, continuous-time context. Mission planning for autonomous agents such as planetary rovers or unmanned aircrafts often correspond to such time-dependent planning problems. Modeling these problems can be cast through the framework of time-dependent Markov...
Localization of sensor nodes is one of the key issues in wireless sensor networks. It is a precondition for a variety of applications, as well as geographic clustering and routing. A simple approach for coarse grained localization is centroid localization (CL) which was firstly presented by Bulusu et al. and assumed regularly arranged beacons. Unfortunately, CL has a biased error whenever exactly...
An expert teacher's assessment of new skills can achieve a suitable total score without having to consider to every sub-item. In addition, while completing a skill assessment there are the formal weighting arrangements of every sub-item. This study proposed two new methods using the technique for fuzzy decomposition analysis, which arranges weightings, quickly and exactly. The maximum solution of...
In this paper, we will present new classes of fast methods for efficiently numerically solving the exterior wave equation on unbounded domain by retarded potentials.
A convenient method that enables easy discretization of fractional differential differential equations and their systems is described and illustrated on numerical solution of various types of fractional differential equations. The suggested method is the development of Podlubny's matrix approach (Podlubny I., Fractional Calculus and Applied Analysis, vol. 3, no. 4, 2000, 359-386; Podlubny I. et al...
Cognitive radio has become an effective theory to solve the inefficiency of the spectrum usage, especially the energy detection in spectrum sensing technique. Recently several researches have focused on the performances of sensing using Gaussian approximation instead of real chi-square distribution based on central limit theory. In this paper, we specifically investigated the errors caused by approximation...
We devise an analytically simple as well as invertible approximate expression, which describes the relation between the maximum free distance of a binary code and the corresponding maximum attainable code-rate. For example, for a half-rate, length-128 binary code the known bounds limit the maximum attainable free distance to 16 < d(n = 128, r = 0.5) < 32, while our solution yields d(n = 128,...
We study a class of LQG control problems with N decision makers possessing different dynamics. The basic objective is to minimize a social cost function as the sum of N individual costs containing mean field coupling. For large N, the exact socially optimal solution (which also has the Pareto optimality property) requires centralized information and this leads to high computational complexity. In...
The orthogonal projection iteration for the solutions of a class of constrained matrix equation and the related optimal approximation problem is considered. The iteration method for the symmetric ortho-anti-symmetric solution of the matrix equation AX = B is constructed. The convergence of the method is proved and the estimation of the convergence rate is given. The method converges to its least-norm...
In this paper we investigate the gravitational waves emission by stellar dynamical structures as complex systems in the quadrupole approximation considering bounded and unbounded orbits. Precisely, after deriving analytical expressions for the gravitational wave luminosity, the total energy output and gravitational radiation amplitude, we present a computational approach to evaluate the gravitational...
In this paper, we present a framework for Bayesian inference in continuous-time diffusion processes. The new method is directly related to the recently proposed variational Gaussian Process approximation (VGPA) approach to Bayesian smoothing of partially observed diffusions. By adopting a basis function expansion (BF-VGPA), both the time-dependent control parameters of the approximate GP process and...
The problem of the structure and energy of a charged 180-degree head-to-head domain wall is considered, using Landau theory. It was found that the scales controlling the wall structure can be very different from the Debye radius. Depending on the spontaneous polarization and the concentration of free carriers, these scales can be about the Thomas-Fermi screening length or about those typical for screening...
Computation offloading can extend the battery lifetime of a portable device by migrating computation to grid- powered servers. The server may charge the portable device for the computation performed, thus providing offloading as a service. The portable device has to trust that the server has indeed performed the computation as claimed. We propose a protocol to establish trust for computation offloading...
The main objective of this paper is to put forward Granular Matrix (GrM). By the definition of GrM, all the fundamental algebraic definitions of Rough Set Theory (RST) are redefined by simple matrix operation. Furthermore, two different definitions (algebraic definition and rough membership function definition) for rough inclusion and rough equivalence are united by GrM. GrM help us understand the...
The present work develops a method to determine higher-order corrections to the pi criterion, derived from basic results of Center Manifold theory. The proposed method is based on solving the Center Manifold PDE via power series. The advantage of the proposed approach is the improvement of the accuracy of the pi criterion in predicting performance under larger amplitudes. The proposed method is applied...
This paper aims to analyze the cold field electron emission from bulk metals using both Fowler-Nordheim and Millikan-Lauritsen plots. The use of Millikan-Lauritsen plots is demonstrated to investigate the validity of Fowler-Nordheim theory. It is recommended that Millikan-Lauritsen plots, rather than Fowler-Nordheim plots, can be used as a basic tool for analyzing experimental field emission data.
The multilevel fast multipole algorithm (MLFMA) provides accurate and efficient solutions of electromagnetic scattering problems involving large and complicated structures. On the other hand, whenever applicable, accelerations provided by approximation techniques can be useful to further improve the efficiency of solutions. In this paper, we present a hybrid technique, which combines the physical-optics...
This paper exploits the displacement structure of the coefficient matrix of the linear system of equations pertinent to the affine projection algorithm (Aped), to obtain the exact solution in a way faster than any other existing exact method. The main emphasis of the paper is to present the concepts of displacement structure theory and how these are applied to the APA context.
In this paper, an H1-Galerkin mixed finite element method is proposed to simulate the viscoelasticity type equation. The problem is considered in n-dimentional (n<4) space, respectively. The optimal error estimates are also established. In particular, our methods can simultaneously approximate the scalar unknown and the vector flux effectively, without requiring the LBB consistency condition.
In this paper, we provide a fast algorithm for solving the pricing of American options, which is easier to apply and implement in computer comparing with general difference method. Our research substantially reduces the computational time as well as improves the computational efficiency and accuracy considerably. Furthermore, we propose and implement a numerical procedure for computing the pricing...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.