نتایج جستجو برای: stepwise multi varaite regression

تعداد نتایج: 780480  

2004
Joseph P. Romano Michael Wolf Solomon H. Snyder

It is common in econometric applications that several hypothesis tests are carried out at the same time. The problem then becomes how to decide which hypotheses to reject, accounting for the multitude of tests. In this paper, we suggest a stepwise multiple testing procedure which asymptotically controls the familywise error rate at a desired level. Compared to related single-step methods, our p...

Journal: :iranian chemical communication 0
mehdi nekoei department of chemistry, shahrood branch, islamic azad university, shahrood, iran

in this paper, the quantitative structure activity-relationship (qsar) of the ccr2b receptor inhibitors was scrutinized. firstly, the molecular descriptors were calculated using the dragon package. then, the stepwise multiple linear regressions (sw-mlr) and the genetic algorithm multiple linear regressions (ga-mlr) variable selection methods were subsequently employed to select and implement th...

Journal: :journal of medicinal plants and by-products 0

the chamomile species of anthemis triumfettii (l.) all is one of important medicinal plant belong to compositae family and it grows as wild species in zagros and alborz mountains, iran. the aim of this study was to evaluation of morphological and phenological traits and their relationships with essential oil. seeds of seven accessions were sown in jiffy pots and transferred to field using rando...

Journal: :journal of rangeland science 2013
naghmeh gholami baghi adel sepehri hossein barani salman abdol-rasoul mahini

plant biomass is an important factor for determining arid and semi-aridrangelands capacity. due to the lack of proper and annual sampling of rangelands, there areno suitable data to determine biomass, range condition and proper range managementoperations. plant biomass is one of the measurable attributes that can be assessed inrangeland studies. since the clip and weight method is destructive a...

A. Hosseini A. Kamkar Rouhani A. Roshandel J. Hanachi M. Ziaii R. Gholami

Porosity is one of the key parameters associated with oil reservoirs. Determination of this petrophysical parameter is an essential step in reservoir characterization. Among different linear and nonlinear prediction tools such as multi-regression and polynomial curve fitting, artificial neural network has gained the attention of researchers over the past years. In the present study, two-dimensi...

Journal: :Data Knowl. Eng. 2007
Tsai-Hung Fan Kuang-Fu Cheng

Abstract In this paper, a two-stage block hypothesis testing following the idea of Fan, Lin and Cheng (2004) is proposed for massive data regression analysis. Variables selection criteria incorporating with classical stepwise procedure are also developed to select significant explanatory variables. Simulation study confirms that our approach is more accurate in the sense of achieving the nomina...

2011
Oscar Tamburis Massimo Mangia Angelo Rossi Mori

The Italian Federation of Healthcare Trusts and Municipalities promoted a national initiative (LITIS, Italian acronym for: Levels of Technological Innovation in Healthcare), to assist its members in the governance of the eHealth phenomenon. The LITIS model spans over the complete spectrum of the eHealth support to care and administrative processes, from two perspectives: the Functions F (servic...

2000
Peter Welzel Gerhard Seibert

A stepwise degradation of the oligosaccharide part of moenomycin A (2) was performed. The degradation products were assayed for antibiotic activity both in vivo and in an E.coli cell-free system. Units E, F, G, H, and I have been found -to be essential for full biological (in vitro) activity. _It is suggested that 2 is a competitive inhibitor of the peptidoglycan polymerase.

2009
Sylvie Athènes Mathieu Raynal Philippe Truillet Jean-Luc Vinot

In this paper, we describe an interface to display texts in a fashion adapted to dyslexic readers. In order to help the reading task, we designed several tools geared towards the specific difficulties of this population, e.g. a tendency to lose one’s place within the text, a fluctuating attention or a difficulty to access the syllable level of the words, a process known to be used with new or i...

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید