نتایج جستجو برای: statistical method

تعداد نتایج: 1911221  

Journal: :Optics express 2009
Han-Ling Wu Hai-Xing Yan Xin-Yang Li Shu-Shan Li

A relative displacement between the grid points of optical fields and those of phase screens may occur in the simulation of light propagation through the turbulent atmosphere. A statistical interpolator is proposed to solve this problem in this paper. It is evaluated by the phase structure function and numerical experiments of light propagation through atmospheric turbulence with/without adapti...

2014
Suzanne M. Mahon

APRIL 2005 • VOLUME 9, NUMBER 2 • CLINICAL JOURNAL OF ONCOLOGY NURSING This is the second in a series of articles to help nurses use and understand statistics. The purpose of the series is to assist nurses in critically reviewing published studies and implementing the fi ndings of research into clinical practice. The fi rst article addressed basic statistical considerations and types of variabl...

Journal: :Communications and Network 2011
Jiafeng Wang Yang Yue Jun Yao

In this paper, a statistical recognition method of the binary BCH code is proposed. The method is applied to both primitive and non-primitive binary BCH code. The block length is first recognized based on the cyclic feature under the condition of the frame length known. And then candidate polynomials are achieved which meet the restrictions. Among the candidate polynomials, the most optimal pol...

2006
Ana Paula Rodrigues Ramos Lílian Ribeiro Mendes Paiva Luciano Vieira Lima

The information extracted from electromyographic signals can provide researchers with a number of useful information to study muscle activity. Various techniques can be found in the literature to perform such analyses. However, most of them, when dealing with dynamic contractions, for instance, do not take adequate care when highlighting the correct window of the collected signal. Hence, the re...

Journal: :Neural Computation 1992
Nelson Morgan Hervé Bourlard

We show that it is possible to factor a multi-layered classiication network with a large output layer into a number of smaller networks, where the product of the sizes of the output layers equals the size of the original output layer. No assumptions of statistical independence are required.

2017
Shen Tan Bingfang Wu Nana Yan Weiwei Zhu

This study proposes a new method for downscaling ETWatch 1-km actual evapotranspiration (ET) products to a spatial resolution of 30 m using Landsat8 normalized difference vegetation index (NDVI) data. The NDVI is employed as an indicator of land-surface vegetation, which displays periodic spatial patterns on the land surface. A 30-m-resolution ten-day ET dataset is then calculated primarily usi...

1999
David J. Marchette

Two clustering methods are described and applied to network data. These allow the clustering of machines into “activity groups”, which consist of machines which tend to have similar activity profiles. In addition, these methods allow the user to determine whether current activity matches these profiles, and hence to determine when there is “abnormal” activity on the network. A method for visual...

2005
M. S. Wheatland

A Bayesian approach to solar flare prediction has been developed, which uses only the event statistics of flares already observed. The method is simple, objective, and makes few ad hoc assumptions. It is argued that this approach should be used to provide a baseline prediction for certain space weather purposes, upon which other methods, incorporating additional information, can improve. A prac...

2003
Longzhuang Li Yi Shang Wei Zhang Hongchi Shi

In the paper, we propose a general method for statistical performance evaluation. The method incorporates various statistical metrics and automatically selects an appropriate statistical metric according to the problem parameters. Empirically, We compare the performance of five representative statistical metrics under different conditions through simulation. They are expected loss, Friedman sta...

Journal: :Clinical chemistry 1975
G T Wu S L Twomey R E Thiers

Comparison of two methods for determining a substance is a common procedure in clinical chemistry. Almost without exception, normal theory statistics are used with the tacit assumption that the data under test show gaussian distributions. Experience has led us to question this assumption for populations of differences between values obtained by two methods applied to common samples and for popu...

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