نتایج جستجو برای: uniformity test

تعداد نتایج: 824981  

2006
Felix Weninger

In the first part, we introduce randomized algorithms as a new notion of efficient algorithms for decision problems. We classify randomized algorithms according to their error probabilities, and define appropriate complexity classes. (RP, coRP, ZPP, BPP, PP). We discuss which classes are realistic proposals for design of probabilistic algorithms. We cover the implementation of randomized algori...

1996
LUCIA CAPORASO BARRY MAZUR

1. Uniformity and correlation 1 1.

2010
J. BECK

Introduction. The purpose of this report is to draw attention to some nontrivial connections between the ("continuous") theory of irregularities of distribution and discrete mathematics. The object of the theory of irregularities of distribution is to measure the uniformity (or nonuniformity) of sequences and point sets. For instance: how uniformly can an arbitrary set of N points in the unit c...

2013
İsmail Hakki Karahan

Environmentally friendly and cyanide-free sulfate bath under continuous current and the corrosion behavior of electrodeposits of zinc-iron alloys were studied by means of electrochemical tests in a solution of 3.5% NaCl in presence and absence of glycine. The effects of pH on the quality of Zn-Fe coatings were investigated in order to improve uniformity and corrosion protection performance of t...

Journal: :Journal of nuclear medicine : official publication, Society of Nuclear Medicine 2014
Jeffrey S Nelson Olav I Christianson Beth A Harkness Mark T Madsen Eugene Mah Stephen R Thomas Habib Zaidi Ehsan Samei

UNLABELLED Because γ cameras are generally susceptible to environmental conditions and system vulnerabilities, they require routine evaluation of uniformity performance. The metrics for such evaluations are commonly pixel value-based. Although these metrics are typically successful at identifying regional nonuniformities, they often do not adequately reflect subtle periodic structures; therefor...

2003
Evan Kirby Oleg Tsai

In April 2003, UCLA researchers conducted test run T466 at the Stanford Linear Accelerator Center with their newly designed electromagnetic calorimeter towers composed of tungsten powder and scintillating fibers. The prototype’s energy resolution, uniformity of response, and linearity were measured using an electron beam with a momentum of up to 10 GeV. The measured energy resolution was 17%/ √...

2017
Armin Eilaghi Sameer Baig Yucheng Zhang Junjie Zhang Paul Karanicolas Steven Gallinger Farzad Khalvati Masoom A. Haider

BACKGROUND To assess whether CT-derived texture features predict survival in patients undergoing resection for pancreatic ductal adenocarcinoma (PDAC). METHODS Thirty patients with pre-operative CT from 2007 to 2012 for PDAC were included. Tumor size and five texture features namely uniformity, entropy, dissimilarity, correlation, and inverse difference normalized were calculated. Mann-Whitne...

2009
M. C. Gohel S. A. Nagori

The aim of present study were to arrest the problem of content uniformity without the use of harmful organic solvent and to improve ex vivo permeability of captopril, a low dose class III drug as per biological classification system. Eutectic mixture of camphor and menthol was innovatively used in the work. Captopril solution in eutectic mixture was blended with Avicel PH 102 and then the mixtu...

2015
Hui-Ying Li Yun-Fei Liu Yu Duan Yong-Qiang Yang Yi-Nan Lu

Preparation of dense alumina (Al₂O₃) thin film through atomic layer deposition (ALD) provides a pathway to achieve the encapsulation of organic light emitting devices (OLED). Unlike traditional ALD which is usually executed at higher reaction n temperatures that may affect the performance of OLED, this application discusses the development on preparation of ALD thin film at a low temperature. O...

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