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Differential Amplitude Phase Shift Keying (Dapsk): A New Modulation Method For A Turbo Code In Digital Radio Broadcasting
(
Qatar University
, 2003 , Article)
The multilevel modulation techniques of M–Differential Amplitude Phase Shift Keying (DAPSK) have been proposed in combination with Turbo code scheme for digital radio broadcasting bands below 30 MHz radio channel. Comparison ...
Investigation of the Fouling Mechanisms in the Heat Exchangers of a Hydrotreater
(
Qatar University
, 2005 , Article)
The problem of fouling on heat exchanger surfaces has been one of the major unresolved problems of the hydrotreatment unit at the Homs oil refinery in Syria. In this unit, a feed stream of straight-run naphtha is preheated ...
A Demodulation Technique For Power System Local Frequency And Voltage Measurements
(
Qatar University
, 2003 , Article)
The demodulation technique of two complex signals is used to estimate the power system local frequency and voltage phasor. The first complex signal is generated from the three-phase voltage waveform by using the ...
Repetitive Control Based Pwm Inverter Dead-Time Compensation For Ac Servo Drive
(
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 ...
Dynamic Analysis Of A Novel Manpowered Transportation Vehicle With High Mechanical Efficiency
(
Qatar University
, 2002 , Article)
This paper evaluates the dynamics of a novel manpowered
transportation vehicle. The vehicle has a novel mechanism that
maximizes the mechanical input work and utilizes the weight of the
rider for propulsion. The rider ...
Calcium Nitrite Effect On Setting Of Cement At Various Temperatures
(
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 ...
A Neural Controller Using Imc Strategy
(
Qatar University
, 2000 , Article)
In this paper a nonlinear Internal Model Control (IMC) strategy based on a modified NARMA model is proposed. The IMC controller consists of a model inverse controller and a robustness filter with a single tuning parameter. ...
Performance Simulation Of Single-Evaporator Domestic Refrigerator Using Alternative Refrigerants
(
Qatar University
, 2003 , Article)
The search for well-functioning and energy-optimized refrigeration systems has made modeling and simulation of such systems an important tool for the industry in terms of product development. The present study explores how ...
The Effect Of Initial Temperature On Burning Velocity Of Methane, Propane, Lpg And Iso Butane - Air Mixtures
(
Qatar University
, 2001 , Article)
In present work, the burning velocity of a fuel - air mixtures varies with equivalence ratio, temperature and number of carbon atoms. Laminar flame speed have been measured experimentally inside a tube using the optical ...