نتایج جستجو برای: finite di erence
تعداد نتایج: 512631 فیلتر نتایج به سال:
In the eld of pattern matching, there is a clear trade-o between e ectiveness, accuracy and robustness on one hand and e ciency and simplicity on the other hand. For example, matching patterns more e ectively by using a more general class of transformations usually results in a considerable increase of computational complexity. In this paper, we introduce a general pattern matching approach whi...
A class of preferential orderings in non-monotonic logics assumes that various extensions of a model (possible worlds) can be ordered based on both their likelihood and desirability. I suggest that there is a basic incompatibility between this qualitative notion of preference and the decision-theoretic notion of utility. I demonstrate that while reasoning and decision making in the former can f...
We present a two level nite di erence scheme for the approximation of nonlinear parabolic equations. Discrete inner products and the lowest order Raviart-Thomas approximating space are used in the expanded mixed method in order to develop the nite di erence scheme. Analysis of the scheme is given assuming an implicit time discretization. In this two level scheme, the full nonlinear problem is s...
Various exact tests for showing a di&erence between two treatments or the non-inferiority (therapeutic equivalence) based on the di&erence of two binomial proportions are compared. It is found that a frequently used test has to be applied with great caution due to its numerical instability. Furthermore, a test based on the score statistic can be recommended as a good compromise between a simple...
Many linear macroeconomic models can be cast in the rst-order form, AEtyt+1 = Byt +CEtxt; if the matrix A is permitted to be singular. For this singular linear di¤erence system under rational expectations, we show there is a unique stable solution under two requirements: (i) the determinental polynomial jAz ¡ Bj is not zero for some value of z, and (ii) a rank condition is satis ed which is a ...
This article proposes bootstrap-based stochastic dominance tests for nonparametric conditional distributions and their moments. We exploit the fact that a conditional distribution dominates the other if and only if the di¤erence between the marginal joint distributions is monotonic in the explanatory variable for each value of the dependent variable. The proposed test statistic compares restric...
Sound localization for a robot or an embedded system is usually solved by using Interaural Phase Di erence (IPD) and Interaural Intensity Di erence (IID). These values are calculated by using Head-Related Transfer Function (HRTF). However, HRTF depends on the shape of head and also changes as environments changes. Therefore, sound localization without HRTF is needed for real-world applications....
The main purpose of this work is to investigate the solutions, periodic character and study global asymptotic behavior so- lutions following rational di↵erence equation x_(n+1) = x_(n-2)*x_(n-6) / x_(n-3)*(±1 ± x_(n-2)*x_(n-6)) with a non-zero real numbers initial conditions.
Numerical simulation of uid ow in a hydrocarbon reservoir has to ac count for the presence of wells The pressure of a grid cell containing a well is di erent from the average pressure in that cell and di erent from the bottomhole pressure for the well Peaceman This paper presents a study of grid pressures obtained from the simulation of single phase ow through an isotropic porous medium using d...
The well-known necessary and su$cient condition to "nd a solution to the robust strictly positive real (SPR) problem, namely, that the phase di!erence of the polynomials involved must be less than p, was found to be also necessary and su$cient in the strengthened robust SPR problem by Anderson and Landau in a recent work, only for the continuous-time case. In this brief communication, we derive...
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