Interpretation of ZnO luminescence peculiarities by use of rate equation system

Abstract In this paper we wish to present the numerical model elaborated in order to simulate some physical phenomena that influence the general deterioration of steel, whether hot dip galvanized or not, in reinforced concrete. We describe the physical and mathematical models, establishing the corresponding equation system, the initial and boundary conditions. We have also presented the numeric model associated to the mathematical model and the numeric methods of discretization and solution of the differential equations system that describes the mathematical model.

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Prediction of Tread Pattern Wear by an Explicit Finite Element Model3

Tire Science and Technology ◽

10.2346/1.2804913 ◽

2007 ◽

Vol 35 (4) ◽

pp. 276-299 ◽

Cited By ~ 18

Author(s):

J. C. Cho ◽

B. C. Jung

Keyword(s):

Finite Element ◽

Wear Rate ◽

Tangential Stress ◽

Rate Equation ◽

Constitutive Equations ◽

Slip Velocity ◽

Test Results ◽

Explicit Finite Element ◽

Driving Condition ◽

Driving Conditions

Abstract Tread pattern wear is predicted by using an explicit finite element model (FEM) and compared with the indoor drum test results under a set of actual driving conditions. One pattern is used to determine the wear rate equation, which is composed of slip velocity and tangential stress under a single driving condition. Two other patterns with the same size (225/45ZR17) and profile are used to be simulated and compared with the indoor wear test results under the actual driving conditions. As a study on the rubber wear rate equation, trial wear rates are assumed by several constitutive equations and each trial wear rate is integrated along time to yield the total accumulated wear under a selected single cornering condition. The trial constitutive equations are defined by independently varying each exponent of slip velocity and tangential stress. The integrated results are compared with the indoor test results, and the best matching constitutive equation for wear is selected for the following wear simulation of two other patterns under actual driving conditions. Tens of thousands of driving conditions of a tire are categorized into a small number of simplified conditions by a suggested simplification procedure which considers the driving condition frequency and weighting function. Both of these simplified conditions and the original actual conditions are tested on the indoor drum test machines. The two results can be regarded to be in good agreement if the deviation that exists in the data is mainly due to the difference in the test velocity. Therefore, the simplification procedure is justified. By applying the selected wear rate equation and the simplified driving conditions to the explicit FEM simulation, the simulated wear results for the two patterns show good match with the actual indoor wear results.

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Density matrix and rate equation analyses for picosecond pump/probe combustion diagnostics

AIAA Journal ◽

10.2514/3.14233 ◽

1999 ◽

Vol 37 ◽

pp. 723-731

Author(s):

Thomas Settersten ◽

Mark Linne ◽

James Gord ◽

Gregory Feichtner

Keyword(s):

Density Matrix ◽

Rate Equation ◽

Pump Probe ◽

Combustion Diagnostics

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A New Adsorption Rate Equation in Batch Systems

10.26434/chemrxiv.6209984.v1 ◽

2018 ◽

Author(s):

yongson hong ◽

Kye-Ryong Sin ◽

Jong-Su Pak ◽

Chol-Min Pak

Keyword(s):

Experimental Data ◽

Kinetic Analysis ◽

Adsorption Kinetics ◽

Rate Equation ◽

Kinetic Models ◽

Adsorption Kinetic ◽

Adsorption Rate ◽

Batch Systems ◽

New View

In this paper, the deficiencies and cause of previous adsorption kinetic models were revealed, new adsorption rate equation has been proposed and its validities were verified by kinetic analysis of various experimental data. This work is a new view on the adsorption kinetics rather than a comment on the previous adsorption papers.

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The Links between the Companies Market Price Quality and that of its Management and Business Quality: A System Panel Data Approach

GIS Business ◽

10.26643/gis.v11i6.3383 ◽

2016 ◽

Vol 11 (6) ◽

pp. 28-38

Author(s):

Dinis Daniel Santos ◽

Elias Soukiazis

Keyword(s):

Panel Data ◽

Business Performance ◽

Market Price ◽

Equation System ◽

Simultaneous Equation ◽

System Equation ◽

Simultaneous Equation System ◽

Management Quality ◽

The Relationship

This work uses a simultaneous equation system approach to analyze the relationship between the management and business quality of companies and their market price quality. Using panel data we found that both the management and the business quality of companies positively influence the market price quality of the studied American companies. Additionally, variables like the actual position of the company price quality compared to the industry average, being on the top or the bottom, or the beta value of a company, also influence the market price quality of the respective company. It is shown that the system equation approach is the most appropriate to explain the linkages between price, business, and management quality providing consistent estimates. Also, using ratings to express the three core variables in the system is the most adequate way to define the quality characteristics in terms of price, management, and business performance of the companies considered in this study.

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An Exact Stationary Decision for the Equation System of Gas Dynamics under Gravity and Coriolis Force

Tyumen State University Herald Physical and Mathematical Modeling Oil Gas Energy ◽

10.21684/2411-7978-2018-4-3-84-89 ◽

2018 ◽

Vol 4 (3) ◽

pp. 84-89

Author(s):

Sergei P. Bautin

Keyword(s):

Coriolis Force ◽

Gas Dynamics ◽

Equation System

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Mechanism of hydration and isomerisation of 4-ethylidene-2,6-di-tert-butyl-2,5-cyclohexadien-1-one. Kinetics, acid-base catalysis and solvent deuterium isotope effects

Collection of Czechoslovak Chemical Communications ◽

10.1135/cccc19790110 ◽

1979 ◽

Vol 44 (1) ◽

pp. 110-122 ◽

Cited By ~ 2

Author(s):

Jiří Velek ◽

Bohumír Koutek ◽

Milan Souček

Keyword(s):

Aqueous Medium ◽

Rate Equation ◽

Kinetic Data ◽

Isotope Effects ◽

Base Catalysis ◽

Quinone Methide ◽

Reaction Products ◽

Acid Base ◽

Deuterium Isotope Effects ◽

Hydroxybenzyl Alcohol

Competitive hydration and isomerisation of the quinone methide I at 25 °C in an aqueous medium in the region of pH 2.4-13.0 was studied spectrophotometrically. The only reaction products in the studied range of pH are 4-hydroxybenzyl alcohol (II) and 4-hydroxystyrene (III). The form of the overall rate equation corresponds to a general acid-base catalysis. The mechanism of both reactions for three markedly separated pH regions is discussed on the basis of kinetic data and solvent deuterium effect.

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Kinetics of catalytic reduction of nitrogen oxide by carbon monoxide on CuO/Al2O3 catalyst

Collection of Czechoslovak Chemical Communications ◽

10.1135/cccc19833202 ◽

1983 ◽

Vol 48 (11) ◽

pp. 3202-3208 ◽

Cited By ~ 5

Author(s):

Zdeněk Musil ◽

Vladimír Pour

Keyword(s):

Carbon Monoxide ◽

Nitrogen Oxide ◽

Rate Equation ◽

Catalytic Reduction ◽

Zero Order ◽

Spectroscopic Measurements ◽

First Order ◽

Ir Spectroscopic ◽

Kinetics Of ◽

Al2o3 Catalyst

The kinetics of the reduction of nitrogen oxide by carbon monoxide on CuO/Al2O3 catalyst (8.36 mass % CuO) were determined at temperatures between 413 and 473 K. The reaction was found to be first order in NO and zero order in CO. The observed kinetics are consistent with a rate equation derived from a mechanism proposed on the basis of IR spectroscopic measurements.

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