نتایج جستجو برای: poisson ratio

تعداد نتایج: 531928  

Journal: :journal of research in health sciences 0
sampurna kakchapati jurairat ardkaew

background: malaria is a major cause of morbidity and mortality in nepal. the magnitude of malaria across the country is alarming and varies with location. therefore, the present study aimed to model malaria incidence rates during 1998 to 2009 in nepal. methods: data for the study were obtained from health management information system (hmis), ministry of public health. a negative binomial mode...

Journal: :journal of biostatistics and epidemiology 0
majid sadeghifar department of statistics, school of basic sciences, bu-ali sina university, hamadan, iran. maryam seyed-tabib department of biostatistics & epidemiology, school of public health, hamadan university of medical sciences, hamadan, iran. saiedeh haji-maghsoudi department of biostatistics & epidemiology, school of public health, hamadan university of medical sciences, hamadan, iran. kourosh noemani department of non-communicable disease, school of health, ahvaz jundishapur university of medical sciences, ahvaz, iran. fariba aalipur-byrgany department of non-communicable disease, school of health, ahvaz jundishapur university of medical sciences, ahvaz, iran.

background & aim: congenital hypothyroidism (ch) is one of the most common endocrine diseases and is a major cause of preventable mental retardation. early diagnosis of ch can help prevent future diseases. although time series techniques are often utilized to forecast future status, they are inadequate to deal with count data with overdispersion. the aim of this study was to apply poisson hidde...

2011
Liang Dong Donald S. Stone Roderic S. Lakes

Substantial softening in the bulk modulus (a factor of five) and a negative Poisson ratio (-0.25) have been observed via broadband viscoelastic spectroscopy in the vicinity of the Curie point of a barium titanate ceramic. These effects were observed under electrical short-circuit conditions at low deformation frequencies. Softening was less in an electric open circuit or at higher frequencies. ...

Journal: :The Journal of the Acoustical Society of America 2009
Daniel Royer Dominique Clorennec Claire Prada

The variation, with material parameters, of Lamb modes is investigated. Vibration spectra of traction-free elastic plates are generally presented, for a given isotropic material, as a set of dispersion curves corresponding to the various Lamb mode branches. Here, the spectrum variations, with the Poisson ratio nu, are plotted in a dimensionless co-ordinate system in the form of a bundle of curv...

2011
Wei Ji Ma Vidhya Navalpakkam Jeffrey Beck Ronald van den Berg Alexandre Pouget

1 Theory .......................................................................................................................... 1 1.1 Global log likelihood ratio ................................................................................... 1 1.2 Local log likelihood ratio (neural form) ............................................................... 3 1.3 Local log likelihood ratio (be...

Journal: :Physical review. E 2016
R Cuerno R Gallardo Caballero A Gordillo-Guerrero P Monroy J J Ruiz-Lorenzo

We revisit the universal behavior of crystalline membranes at and below the crumpling transition, which pertains to the mechanical properties of important soft and hard matter materials, such as the cytoskeleton of red blood cells or graphene. Specifically, we perform large-scale Monte Carlo simulations of a triangulated two-dimensional phantom network which is freely fluctuating in three-dimen...

2007
Esdras Medeiros Luiz Velho Helio Lopes Thomas Lewiner ESDRAS MEDEIROS LUIZ VELHO HELIO LOPES THOMAS LEWINER

We consider 2D Alpha Solid Complexes of Poisson disc samplings of regions of solid objects. In this article we prove that the triangles have aspect ratio less or equal than 4 √ 3. This fact implies that the mesh has a good quality.

2006
O Levy

Negative Poisson ratio (NPR) materials based on a re-entrant honeycomb structure expand in the direction perpendicular to an externally exerted tension. This feature makes NPR structures attractive for use in microsensors and actuators as versatile motion transformers. When implemented in microdevices, where slender and flexible micromachined elements are widely used, the NPR material can toler...

2013
Dong Li Liang Dong Roderic S. Lakes

1 College of Sciences, Northeastern University, Shenyang 110819, PR China 2 Materials Science Program, University of Wisconsin, Madison, WI 53706-1687, USA 3 Department of Engineering Physics, University of Wisconsin, Madison, WI 53706-1687, USA

2007
M. Kirkove A. Seret

Scintigraphic images are strongly affected by Poisson noise. This article presents the results of a comparison between denoising methods for Poisson noise according to different criteria: the gain in signal-to-noise ratio, the preservation of resolution and contrast, and the visual quality. The wavelet techniques recently developed to denoise Poisson noise limited images are divided into two gr...

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