Abstract— Harmonics that are created by non-linear devices connected to the power system. Power system harmonics are multiples integer of the fundamental power system frequency and these harmonic frequencies can create distorted voltages and currents. Distortion of voltages and currents can impact on the power system adversely causing power quality problems. Therefore, approximation of harmonics is of high importance for efficiency of the power system network to maintain the quality limits…
minerals can either dissolve or precipitate. As shown in equation R11 of an example of calcite dissolution/precipitation, a mineral species (Calcite) is involved in a reaction with only aqueous species (〖CO〗_2,H〖〖CO〗_3〗^-,H^+ ) and no other mineral species. The law of mass action governing the mineral dissolution/precipitation reaction dictates that the reaction rates be calculated as: r_β=k_β A ̇_β (1-Q_β/K_(eq,β) )…
thermodynamic system occupying in a single zone for the compression, expansion, intake, exhaust processes and two zones (burned and unburned zone) for the combustion process. The instantaneous composition of cylinder gases are obtained from the mass fraction of fuel burned. The instantaneous thermodynamic properties are computed by the established equations [20-21, 28]. The instantaneous gas properties are calculated by the simultaneous numerical integration of the differential equations. The…
mechanics has become fundamentally important part of computational science and engineering, concerned with the use of computational approaches to characterize, predict and simulate physical events and engineering systems governed by the laws of mechanics as it uses computers and digital systems software to help engineers…
heat transfer problems which occur in practical take transient measurements at more than one location to find heat flux and temperature distribution on the wall. This is the inverse heat transfer problem. Inverse heat conduction problem becomes non-linear in nature if thermal properties are the function of temperature. In the conventional problem by direct heat transfer we are given the data on the surface from which…
Contents 1) Executive Summary: 2 2) Introduction: 2 3) Theory: 3 a. Equations 3 b. Calculating Theoretical Pressure Drop 3 i. Assumptions 3 ii. Derivation of Darcy Weisbach Equation 4 4) Method: 5 a. Apparatus and Setup 5 b. Method 5 5) Results: 7 a. Pipe 1 (7mm Diameter) 7 b. Pipe 2 (7mm Diameter) 8 c. Pipe 3 (4mm Diameter) 9 6) Analysis of Results 11 7) Conclusion 11 8) References 11 9) Appendices 11 Executive Summary: Introduction: The aim of the experiment was to calculate the…
Theoretical Framework The Proportional Odds Model A binary logistic regression model estimates the odds and the probability of experiencing an event for the dichotomous outcome variable on a set of predictors. The logistic regression model is defined as: ln(Y′) = logit [π(x)] = ln = α + β1X1 + β2X2 + …+ βpXp. (1) where logit [π(x)] is the log odds of success, and the odds is a ratio between the probability of having an event and the probability of not having that event.…
1. Result and discussion 1.1. Characterization of PUF and removal of Fe+3 on PUF 1.1.1. Characterization of PUF 1.1.1.1. Hydrolysis of white PUF using HCl The mass lost after 24 h in HCl concentration by the PUF was 0.45%. was i.e., with increasing acid concentration and some groups of the PUF the percentage loss of mass increased were hydrolysed. The cube shape of PUF was affected by acid washing i.e.the size of the cubes became smaller and they packed more closely together (Moawed, 2008). 1.1…
has used a Vessel Monitoring System (VMS) to monitor the activities of all vessels greater than…
restoration approach should be used and the equations presented which will be used was done by (M. Sistiaga, 1998). The selected method was to use Partial Derivative Equations (P.D.E.) as it successfully restored images and replaced linear filtering methods. A scheme that has been developed to restore images is multi-scale morphological analysis proposed by (L. Alvarez, 1992), which was used by (Lucido, 1997), the diffusion is based on an equation in the…