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Now showing items 11-20 of 24
The Behavior Of Molasses As A Microbial Nutrient In The Absence Of Microbes
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Qatar University
, 2000 , Article)
In this work the effect of molasses, as a bacterial nutrient, on the pH and surface tension of the aqueous phase, IFT, and phase behavior after one week contact time was studied at 60°C. The results have shown that the pH ...
LQRr Real-Time Control For Plants With Variable Parameters
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Qatar University
, 2002 , Article)
This paper deals with real-time optimal LQR control of plants that experience sudden changes in their parameters and states. The technique is based on real-time LQR control problem. Riccati equation is solved recursively ...
Frame Synchronization In Ofdm Systems Using Neural Networks, With Dsp Implementation
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Qatar University
, 2002 , Article)
This paper presents a method for estimation of the timing offset in OFDM (Orthogonal Frequency Division Multiplexing) systems. The author showed that it is possible to detect the start of the OFDM blocks without the use ...
Reduced Snubber Circuit Elements For Pwm Voltage Source Inverter
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Qatar University
, 2002 , Article)
This paper presents the description and simulation of a new proposed arrangement of RLD/RCD snubber circuit used with pulse width modulated voltage source inverter. The new arrangement allows minimizing the number of active ...
Productivity And Economical Feasibility Of Multi Lateral Wells In Comparison Of A Horizontal Well
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Qatar University
, 2000 , Article)
This paper presents an economical model developed for assessing the feasibility of drilling multi lateral holes for exploiting oil reservoirs. Detailed equations are given for calculating the cost, return on investment and ...
A Parametric Study On Transportation Problem Under Fuzzy Environment
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Qatar University
, 2002 , Article)
This paper presents a solution algorithm for solving the transportation problem having fuzz) parameters in the constraints. A parametric studv is carried out For this problem. Some basic stability notions are defined and ...
Voltage Stability Margin Identification Using Local Measurements And Linear Kalman Filter
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Qatar University
, 2002 , Article)
Voltage stability investigation is of a great importance for long-term electric load expansion as well as power system operation. This paper presents a new algorithm for identification of voltage instability in a specified ...
Repetitive Control Based Pwm Inverter Dead-Time Compensation For Ac Servo Drive
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Qatar University
, 2002 , Article)
AC servomotor speed or current controller based on PI control and/or optimal control, can not eliminate the cyclical fluctuations of speed or current when subject to periodic disturbances. However, repetitive control ...
Contribution Of Horizontal Drilling Technology In The Development Programs Of Saudi Oil Fields
(
Qatar University
, 2001 , Article)
The technology of drilling and production of horizontal wells is probably one of the most significant breakthrough in the oil and gas industry of the eighties. The continuous improvement of hardware equipment made horizontal ...
Calcium Nitrite Effect On Setting Of Cement At Various Temperatures
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Qatar University
, 2000 , Article)
Calcium Nitrite, which is used as corrosion inhibitor, accelerates stiffening rates of cement. This paper deals with the effect of calcium nitrate on setting times of cement pastes at various curing temperatures. Four ...