Now showing items 111-130 of 221
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Laboratory-Scale Tests on Gas-Solid Fluidized Bed Behaviour And Its Influence on Bed Thermal Properties
( Qatar University , 1988 , Article)The success of many industrial processes depends upon good contact between a fluid and particulate solid. A fluidized bed fulfils the requirements for this good contact. This paper presents the results of an experimental ... -
Liquid Density Of Pure And Multicomponent Fluids By Scaled-Variable-Reduced-Coordinate (Svrc) Method
( Qatar University , 1995 , Article)The Scaled-Variable-Rcduced-Coordinatc (SVRC) method with a proposed set of mixing rules are applied to calculate the liquid density of several system of liquid mixture and satisfactory results are obtained. The ability ... -
Long – Term Soaking Effect On Strength And Deformation Characteristics Of A Gypsiferous Subgrade Soil
( Qatar University , 2003 , Article)The behaviour during long-term soaking of the California Bearing Ratio (CBR), the resilient modulus and the deformation of compacted Iraqi gypsiferous soil containing about 34% gypsum was studied. Sixteen (CBR) samples ... -
LQRr Real-Time Control For Plants With Variable Parameters
( 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 ... -
Material Behaviour Under Corrosive Environment — Guide For Material Selection
( Qatar University , 1988 , Article)In this paper, the behaviour of engineering materials as influenced by fluid velocity, operating temperature, humidity and duration of exposure to chemical and/or electro-chemical action is carefully studied, corrosive ... -
Mathematical Model To Simulate The Surface Runoff For Ubaiyidh Valley In The Western Desert
( Qatar University , 1998 , Article)Water plays an important role in human life and development. The evaluation, planning and management of water resources become important in sustaining human life, specially in arid and semi arid regions. This paper aims ... -
Measurement Of Thermal Conductivity Of Thermally Low-Conducting Materials
( Qatar University , 1995 , Article)The thermal conductivity of a building material is a necessary parameter in estimating the cooling load of a building. Cooling load estimates are quite important in selecting building materials especially in hot-climate ... -
Microcomputer Aided Selection Of Robot Manipulators
( Qatar University , 1991 , Article)This paper presents two programs for microcomputer aided assessment of the performance of robot manipulators. The first program automatically generates robot models based on user-supplied kinematic parameters. The program ... -
A Model For A Narrow-Cut Fractionating Column
( Qatar University , 1997 , Article)A mathematical model was developed to simulate the operation of a narrow-cut fractionating column. The model can calculate boiling point and dew point on the feed plate, the number of liquid and vapour moles, the enthalpy ... -
A Model Reference Adaptive Control Scheme with External Controllers
( Qatar University , 1989 , Article)A new model reference adaptive control scheme, suitable for linear multivariable discrete time systems, is proposed. A set of parameter adaptation algorithms are developed based on the validity of perfect matching between ... -
Multicriterion Optimization Approach For The Design Of Induction Motors
( Qatar University , 1999 , Article)In most engineering design problems, trade offs are to be made among competing factors. This is obvious in the design of electric motors, when more than viewpoint is to be considered. In this paper the problem of induction ... -
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. ... -
New Algorithms For Digital Analysis Of Power Intensity Of Non Stationary Signals
( Qatar University , 1998 , Article)Discrete and continues time-frequency algorithms of the power intensity of non-stationary signals are proposed. Results show that the power intensity waveform analysis performed well in both discrete and continuous ... -
A New Technique To Predict Multilayered Reservoir Characteristics Using Pulse Testing Data
( Qatar University , 1998 , Article)In this study, a mathematical model was developed to present pulse and interference testing for multilayered reservoirs. It was found that apparent storage calculated from pulse testing data is always less than or equal ... -
A New Three Nodes Shell Element With Transverse Shear
( Qatar University , 2000 , Article)This paper proposes a new three node curved shell element. The approach used in the development of the new element is based on the Marguerre shallow shell theory which incorporates the effects of initial curvature (out-of ... -
Non Uniform Differential Amplitude Phase–Shift–Key (Dapsk) Modulation For Multimedia Multicast Wireless Communications With Punctured Convolutional Coding
( Qatar University , 2003 , Article)Simple closed–form expressions for the probability of error for nonuniform M–ary Differential Amplitude Phase–Shift–Key (DAPSK) signaling over an Additive White Gaussian Noise (AWGN) and Rayleigh fading channels are ... -
Nonlinear Adaptive Control Of A Permanent Magnet Stepper Motor
( Qatar University , 1994 , Article)This paper considers adaptive position control of a permanent magnet (PM) stepper motor using exact linearization via static state-feedback. Physical outputs are chosen in such a way that the resulting closed-loop system ... -
A novel push-pull machine for testing High cycle fatigue
( Qatar University , 1990 , Article)A novel machine designed and constructed to exert cyclic axial load for fatigue testing is herein reported. The main features of the test rig constitute the sinusoidal form of load wave and the stress - controlled, system ... -
Numerical Study Of Magneto-Fluid-Mechanics Forced Convection Pipe Flow
( Qatar University , 1994 , Article)The problem of fully developed, laminar, steady, forced convection heat transfer in an electrically conducting fluid flowing in an electrically insulated, horizontal, circular pipe (whose wall is subjected to a uniform ... -
On Improving Communication Software Development Process
( Qatar University , 1995 , Article)This paper aims to standardize the software development process by making use of the well-established hardware development process. The procedure can be applied to any engineering software development process, but we ...
