نتایج جستجو برای: poisson

تعداد نتایج: 33535  

Journal: :Applied Mathematics and Computation 2012
Roberto Garra Federico Polito

We describe a general operational method that can be used in the analysis of fractional initial and boundary value problems with additional analytic conditions. As an example, we derive analytic solutions of some fractional generalisation of differential equations of mathematical physics. Fractionality is obtained by substituting the ordinary integer-order derivative with the Caputo fractional ...

1999
J. Grabowski G. Marmo P. W. Michor Erwin Schrödinger

Pulling back sets of functions in involution by Poisson mappings and adding Casimir functions during the process allows to construct completely integrable systems. Some examples are investigated in detail.

2001
PING XU

Dirac submanifolds are a natural generalization in the Poisson category for symplectic submanifolds of a symplectic manifold. In a certain sense they correspond to symplectic subgroupoids of the symplectic groupoid of the given Poisson manifold. In particular, Dirac submanifolds arise as the stable locus of a Poisson involution. In this paper, we provide a general study for these submanifolds i...

حمیدی, امید, صادقی فر, مجید, قربانی قلی آباد, رقیه, قربانی قلی آباد, سمیه,

Background and Objectives: Delivery is one of the most important services in the health systems, and increasing its effectiveness and efficiency are a health priorities. The aim of this study was to forecast the number of deliveries in order to design plans for using all facilities to provide patients with better services. Methods: The data used in this study were the number of deliveries per ...

Hassan Assareh Kerrie L Mengersen Rassoul Noorossana

Precise identification of the time when a process has changed enables process engineers to search for a potential special cause more effectively. In this paper, we develop change point estimation methods for a Poisson process in a Bayesian framework. We apply Bayesian hierarchical models to formulate the change point where there exists a step < /div> change, a linear trend and a known multip...

Journal: :international journal of nano dimension 0
k. talukdar department of physics, nit durgapur, west bengal, india. m. bhushan centre for nanoscience and technology, pondicherry central university, kalapet, puducherry-605014, india. a. krishna mitra department of physics, nit durgapur, west bengal, india.

ion channels are naturally occurring pores through the proteins that regulate the passage of ions and thus maintain the concentration of ions inside and outside the cell. the ion channels control many physiological functions and they can show selectivity for a specific ion. ion channels are mostly observed in nerve cells and muscle cells. the influx of ions into cells can be regulated by a gate...

Journal: :journal of research in health sciences 0
maryam jalali ali nikfarjam ali akbar haghdoost nadere memaryan termeh tarjoman mohammad reza baneshi

background: in the case of sensitive questions such as number of alcoholics known, majority of respondents might give an answer of zero. poisson regression model (p) is the standard tool to analyze count data. however, p provides poor fit in the case of zero inflated counts, when over-dispersion exists. therefore, the questions to be addressed are to compare performance of alternative count reg...

2000
Philippe MONNIER

In this paper, we want to associate to a n-vector on a manifold of dimension n a cohomology which generalizes the Poisson cohomology of a 2-dimensional Poisson manifold. Two possibilities are given here. One of them, the Nambu-Poisson cohomology, seems to be the most pertinent. We study these two cohomologies locally, in the case of germs of n-vectors on Kn (K = R or C).

Journal: :Glottometrics 2009
Andrij A. Rovenchak Ján Macutek Charles Riley

In the paper, we analyze the distribution of complexities in the Vai script, an indigenous syllabic writing system from Liberia. It is found that the uniformity hypothesis for complexities fails for this script. The models using Poisson distribution for the number of components and hyper-Poisson distribution for connections provide good fits in the case of the Vai script.

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