نتایج جستجو برای: empirical correlation

تعداد نتایج: 586852  

2016
PHILIP ERNST

In this talk, I will discuss how I recently resolved a longstanding open statistical problem. The problem, formulated by the British statistician Udny Yule in 1926, is to mathematically prove Yule's 1926 empirical finding of "nonsense correlation". We solve the problem by analytically determining the second moment of the empirical correlation coefficient of two independent Wiener processes. Usi...

2008
Yvonne S. H. Chang T. Ganesan K. K. Lau

The objective of this research is to compare the use of empirical correlation with Computational Fluid Dynamics (CFD) simulation in determining the pressure gradient in two-phase flow pipelines at the same inlet condition. In this work, the empirical model of Beggs and Brill model had been used whereas the turbulent model applied in the CFD simulation was the Renormalization Group (RNG) k-ε mod...

2015
Deepankar Basu

This paper surveys some of the quantitative empirical research in two areas of Marxist political economy: (a) Marxist national accounts, and (b) Marxist responses to the Sraffa-based critique of the 1970s. With respect to the first area, this paper explains the basic methodology underlying the construction of Marxist national accounts from traditional input-output data. With respect to the seco...

2013
David Austen-Smith Jordi Blanes i Vidal Charles Cameron David Primo David Lewis Brian Roberts Tim Werner John M. de Figueiredo Brian Kelleher Richter

This essay identifies the empirical facts about lobbying which are generally agreed upon in the literature. It then discusses challenges to empirical research in lobbying and provides examples of empirical methods that can be employed to overcome these challenges—with an emphasis on statistical measurement, identification, and casual inference. The essay then discusses the advantages, disadvant...

Journal: :DEStech Transactions on Social Science, Education and Human Science 2018

Journal: :physical chemistry research 0
mehrdad honarmand department of mechanics, tiran branch, islamic azad university, isfahan, iran mohammad reza haghighat nezhad chemical engineering department, shahreza branch, islamic azad university, shahreza, iran vahid pourgharib department of mechanics, tiran branch, islamic azad university, isfahan, iran mohsen beigi department of mechanics, tiran branch, islamic azad university, isfahan, iran

there are a number of techniques available to estimate saturated-liquid molar or specific volumes or densities of liquids. in this study, a new empirical correlation is presented to calculate volume of saturated liquids as a function of critical volume, reduced temperature and acentric factor. an optimization algorithm is utilized to obtain unknown parameters of this correlation by fitting them...

2013
Johannes Dueck Dominic Edelmann Tilmann Gneiting Donald Richards

Székely, Rizzo and Bakirov (2007) and Székely and Rizzo (2009), in two seminal papers, introduced the powerful concept of distance correlation as a measure of dependence between sets of random variables. We study in this paper an affinely invariant version of the distance correlation and an empirical version of that distance correlation, and we establish the consistency of the empirical quantit...

2003
Tal Ezer Hyun-Chul Lee Wilton Sturges

[1] The flow through the Yucatan Channel and into the Gulf of Mexico is a major component of the Gulf Stream and the subtropical gyre circulation. Surprisingly, however, little is known about the forcing and physical parameters that affect the current structures in the Channel. This paper attempts to improve our understanding of the flow through the Channel with a detailed analysis of the curre...

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