STATISTICAL MODEL FOR DETERMINATION OF PROBABILITY OF LIGHTNING STROKES TO GROUND OBJECTS

2016 ◽  
Vol 2016 (2) ◽  
pp. 11-18 ◽  
Author(s):  
E.I. Sokol ◽  
◽  
М.М. Rezinkina ◽  
О.L. Rezinkin ◽  
O.G. Gryb ◽  
...  
Keyword(s):  
Statistical Model

Preparation of graft copolymers by the reaction of polymeric acyl chlorides with monohydroxy-terminated polymers: An introductory study

1988 ◽  
Vol 53 (8) ◽  
pp. 1735-1744 ◽  
Author(s):  
Jitka Horská ◽  
Jaroslav Stejskal ◽  
Pavel Kratochvíl ◽  
Aubrey D. Jenkins ◽  
Eugenia Tsartolia ◽  
...  
Keyword(s):  
Light Scattering ◽  
Chemical Composition ◽  
Statistical Model ◽  
Graft Copolymers ◽  
Coupling Reaction ◽  
Molecular Characteristics ◽  
Gel Formation ◽  
Acyl Chlorides ◽  
Molecular Weights

An attempt was made to prepare well-defined graft copolymers by the coupling reaction between acyl chloride groups located along the backbone chain and monohydroxy-terminated grafts prepared separately. The molecular weights and the parameters of heterogeneity in chemical composition of the products were determined by light scattering and osmometry. The determination of molecular characteristics revealed that the degree of grafting was low. The results therefore could not be confronted with a statistical model at this stage. The problems encountered in the synthesis, e.g., gel formation, and the data relating to the soluble products are discussed.

Statistical Model Explaining the Fine Structure and Interface Reference of Localized Excitons in Type-II GaAs/AlAs Superlattices

1998 ◽  
Vol 07 (01) ◽  
pp. 13-35 ◽  
Author(s):  
M. V. Belousov ◽  
A. Yu. Chernyshov ◽  
I. V. Ignatev ◽  
I. E. Kozin ◽  
A. V. Kavokin ◽  
...  
Keyword(s):  
Statistical Model ◽  
Energy State ◽  
Integer Number ◽  
Type Ii ◽  
Interface Quality ◽  
Alas Layer ◽  
Densities Of States ◽  
Fine Structures ◽  
Localized Excitons

Raman scattering experiments have allowed the determination of the spatial distribution of the thicknesses of GaAs and AlAs layers in a gradient GaAs/AlAs superlattice. A statistical model is developed which is consistent with all the data and ways to improve interface quality are suggested. The fine structures of XΓ and ΓΓ excitons observed in photoluminescence and differential reflection are found to be governed by the fractional parts of the average thickness of the layer (in monolayers). We conclude that each structure has two scales of fluctuations which form the relief of the AlAs surface. The largest fluctuations repeat the relief of the GaAs surface. The second scale has the size of a typical XΓ exciton Bohr radius. The smaller fluctuations disappear when the thickness of the AlAs layer is equal to an integer number of monolayers, which provide interfaces of the quality. The correlation of macro-rough fluctuations on the surface of AlAs and GaAs causes an asymmetry in the densities of states of type II excitons located at either AlAs-on-GaAs or GaAs-on-AlAs interfaces. Hence the lowest PL line is formed by excitons localized across the AlAs-on-GaAs interface. On the other hand, in structures with micro-rough but uncorrelated AlAs surfaces, the lowest energy state is expected to be occupied by excitons localized across the GaAs-on-AlAs interface.

A statistical model for the determination of the optimal metric in factor analysis of medical image sequences (FAMIS)

1993 ◽  
Vol 38 (8) ◽  
pp. 1065-1080 ◽  
Author(s):  
H Benali ◽  
I Buvat ◽  
F Frouin ◽  
J P Bazin ◽  
R Di Paola
Keyword(s):  
Factor Analysis ◽  
Statistical Model ◽  
Medical Image ◽  
Image Sequences

Determination of the Reactivity Degree of Various Alkaline Solutions: A Chemometric Investigation

2019 ◽  
Vol 73 (12) ◽  
pp. 1361-1369 ◽  
Author(s):  
Marie Arnoult ◽  
Colin Dupuy ◽  
Maggy Colas ◽  
Julie Cornette ◽  
Ludovic Duponchel ◽  
...  
Keyword(s):  
Principal Component Analysis ◽  
Raman Spectroscopy ◽  
Statistical Model ◽  
Partial Least Squares Regression ◽  
Principal Component ◽  
Silicate Solution ◽  
Alkaline Solutions ◽  
Least Squares Regression ◽  
Chemometric Techniques

Knowledge of alkaline silicate solutions is crucial in order to optimize geopolymer properties. Geopolymers are new binders resulting from the activation of an aluminosilicate by an alkaline solution. It is well established that the solution reactivity strongly affects the geopolymerization and therefore the geopolymer working properties. As a consequence, an evaluation of the reactivity degree of alkaline silicate solutions prior synthesis is of the utmost interest. However, the determination of the solution reactivity is currently tedious, and for geopolymer commercialization, it would be necessary to find an easy way to determine it. Therefore, Raman spectroscopy, combined with chemometric techniques, is proposed as a solution to easily determine the alkaline silicate solution reactivity. To conduct this investigation, 65 silicate solutions were characterized by Raman spectroscopy, and reference values of their reactivity degree were determined. Finally, principal component analysis and partial least squares regression were performed to build a statistical model able to predict the alkaline silicate solution reactivity from Raman spectra.

A Statistical Model for Intervertebral Disc Degeneration: Determination of the Optimal T2 Cut-Off Values

2013 ◽  
Vol 24 (4) ◽  
pp. 355-363 ◽  
Author(s):  
S. A. Nagy ◽  
I. Juhasz ◽  
H. Komaromy ◽  
K. Pozsar ◽  
I. Zsigmond ◽  
...  
Keyword(s):  
Intervertebral Disc ◽  
Statistical Model ◽  
Disc Degeneration ◽  
Intervertebral Disc Degeneration

The Sequential Bithermal Binaural Caloric Test

1973 ◽  
Vol 82 (6_suppl) ◽  
pp. 9-14
Author(s):  
Franklin O. Black
Keyword(s):  
Statistical Model ◽  
Statistical Methods ◽  
Caloric Test ◽  
Clinical Procedures ◽  
Increased Sensitivity ◽  
Caloric Nystagmus ◽  
Stimulus Temperature ◽  
Retrospective Examination ◽  
Preliminary Support

Three tests for the determination of caloric nystagmus response abnormalities have been developed, based upon analysis of intrasubject normal responses, obtained by using a statistical model that provided an exact fit with clinical procedures. Normal Emits derived from interaural, stimulus temperature, and nystagmus direction responses should provide a more sensitive index of abnormality than limits based on percentage based response criteria. A retrospective examination of caloric responses from Ménière's disease patients provided preliminary support for clinical feasibility and increased sensitivity of the statistical methods advocated for clinical usage.

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