Suchergebnisse

This article is focused on the analytical solution of a TDOA (Time Difference of Arrival) localization method, including analysis of accuracy and unambiguity of a target position estimation in 2D space. The method is processed under two conditions - sufficiently determined localization system and an overdetermined localization system. It is assumed that the TDOA localization system operates in a LOS (Line of Sight) situation and several time-synchronized sensors are placed arbitrarily across the area. The main contribution of the article is the complete description of the TDOA localization method in analytical form only. It means, this paper shows a geometric representation and an analytical solution of the TDOA localization technique model. In addition, analyses of unambiguity and solvability of the method algorithm are presented, together with accuracy analysis of this TDOA technique in analytical form. Finally, the description of this TDOA method is extended to an overdetermined TDOA system. This makes it possible to determine and subsequently optimize its computational complexity, for example increase its computational speed. It seems that such a description of the TDOA localization technique creates a simple and effective tool for technological implementation of this method into military localization systems.

This paper analyzes the implications of price-setting and incomplete financial markets for optimal monetary cooperation. The main objective is to provide the basic intuitions concerning the role of the main international frictions on optimal policy within a simple Dynamic Stochastic General Equilibrium model. We concentrate on a symmetric two-country DSGE with home bias, incomplete financial markets internationally and imperfect competition together with nominal price rigidities in which the export prices can be denominated either in the producer currency (PCP) or in the consumer currency (LCP). In addition, the model can account both for efficient and inefficient shocks. Our main results are derived in polar cases with efficient steady state and for which the design of the optimal policy is specifically illustrative and can be expressed in terms of targeting rules. In particular, the paper gives some new insights on the optimal exchange rate regime given the structure of shocks and the exchange rate pass-through, as well as on the optimal stabilization of CPI and PPI inflation. We also put into perspective the implication of financial autarky on the optimal management of international spillovers.

PACS:02.70.-c, 47.35.+i, 47.40.-x ; In this paper, a simple method is proposed to obtain steady analytical solutions for the lattice Boltzmann method. Based on such analytical results, it is demonstrated how the accuracy of the lattice Boltzmann method can depend on the relative orientation of the lattice and the flow field. It is also demonstrated that the method can be useful to obtain a general class of analytical solutions for the lattice Boltzmann method. Finally, a simple relation is given between the compressibility error and the velocity field. ; This work was supported by the Research Training Network STOPP in the 5th Framework program of the European Union under Grant No. HPRN-CT-1999-00041. ; Peer reviewed

[EN] We present an analytical solution to the electrothermal mathematical model of radiofrequency ablation of biological tissue using a cooled cylindrical electrode. The solution presented here makes use of the method of separation of variables to solve the problem. Green's functions are used for the handling of nonhomogeneous terms, such as effect of electrical currents circulation and the nonhomogeneous boundary condition due to cooling at the electrode surface. The transcendental equation for determination of eigenvalues of this problem is solved using Newton's method, and the integrals that appear in the solution of the problem are obtained by Simpson's rule. The solution obtained here has the possibility of handling different functional dependencies of the source term and nonhomogeneous boundary condition. The solution provides a tool to understand the physics of the problem, as it shows how the solution depends on different parameters, to provide mathematical tools for the design of surgical procedures and to validate other modeling techniques, such as the numerical methods that are frequently used to solve the problem. ; This work was supported by the Universidad Autonoma de San Luis Potosi (Mexico), which granted Ricardo Romero-Mendez a sabbatical leave to do research in the field of biomedical engineering, and the Government of Spain through the "Plan Estatal de Investigacion, Desarrollo e Innovacion Orientada a los Retos de la Sociedad" (Grants TEC 2014-52383-C3-R and TEC 2014-52383-C3-1-R). ; Romero-Méndez, R.; Berjano, E. (2017). An Analytical Solution for Radiofrequency Ablation with a Cooled Cylindrical Electrode. Mathematical Problems in Engineering. (9021616):1-12. doi:10.1155/2017/9021616 ; S ; 1 ; 12 ; 9021616