مرور International Journal of Engineering بر اساس تاریخ انتشار
در حال نمایش موارد 1  20 از 3692

The Potentiodynamic Behavior of Copper in NaCI Solutions Studied by Auger and Photoelectron Spectroscopy
(Materials and Energy Research Center, 19880201)The potentiodynamic behaviour of copper in brine solutions was studies. Auger and photoelectron spectroscopy were used together with electrochemical methods. It is demostrated that the passivation observed in potentiodynamic ...

Design of Logic Network for Generating Sequency Ordered Hadamard Matrix H
(Materials and Energy Research Center, 19880201)A logic network to produce the sequency ordered Hadamard matrix H based on the property of gray code and orthogonal group codes is developed. The network uses a counter to generate Rademacher function such that the output ...

Harmonic Response of Pile Groups to Dynamic Loading
(Materials and Energy Research Center, 19880201)A completely general method of analysis for threedimensional raked piles under harmonic excitation is discussed. The piles have been represented by a threedimensional frame structure and the soil has been represented by ...

Modeling and Performance Evaluation of MultiProcessors Organization with Shared Memories
(Materials and Energy Research Center, 19880201)This paper is primarily concerned with theoretical evaluation of the performance of multiprocessors system. A markovian waiting line model has been developed for various different multiprocessors configurations, with ...

Digital Distance Relaying
(Materials and Energy Research Center, 19880201)Increasing interest is being shown in the use of microprocessor for protection, switching and data acquisition required in modern high voltage substations. One of the most difficult functions to fulfill is that of transmission ...

The Kinetics of Methanation on Nickel Catalysts
(Materials and Energy Research Center, 19880201)An empirical rate equation was obtained for the methanation kinetics catalyzed by MCR2X, a commercial catalyst prepared by HaldorTopsoe. The studies were carried out in a fixedbed reactor under differential conditions, ...

Reliability and Availability Analysis of Fusion Power Plants
(Materials and Energy Research Center, 19880201)Major efforts are underway to develop fusion energy for use in electric power production in the furture. While fusion reactor concepts are being developed, appropriate attention must be given to problems relvant to the ...

Sulfur Species in Particulates Emitted from Reducing Coal Combustion and Pyrometallurgical Furnaces
(Materials and Energy Research Center, 19880201)The method of XRay Photoelectron Spectroscopy is used to determine the chemical state of the sulfur species present in flyash samples produced by burning a number of pulverized coal samples under reducing conditions in ...

Stiffness Matrices for Axial and Bending Deformations of NonPrismatic Beams with Linearly Varying Thickness
(Materials and Energy Research Center, 19880201)Siffness matrices for axial and bending deformations of a beam having a rectangular cross sectional area of constant width and linearly varying thickness are developed. A consistant load vector for a uniformly distributed ...

Flow and Pressure Distributions in Short Heat Exchanger Cores with Abrupt Entrance and Exit
(Materials and Energy Research Center, 19880801)The typical installation of a heat exchange device usually involves a flow contraction at the core entrance and a flow expansion at the core exit. Repeated flow Contraction and expansion are experienced in the flow passages ...

Longitudinal Conduction in Cross Flow Heat Exchanger with Condensation
(Materials and Energy Research Center, 19880801)The deterioration of the performance of a cross flow heat exchanger with condensation due to the longitudinal conduction was investigated. For a relatively small change of wall temperature along the flow directions which ...

Reoxidation Rate of Sponge Iron Pellets, Briquettes and Iron Powder Compressed to Various Compressions in Air
(Materials and Energy Research Center, 19880801)The reoxidation rate of sponge iron pellets and briquettes and oxidation of pure iron powder with compressibility between 27% and 55% in air and within the temperature range 300900°C has been investigated. Factors affecting ...

Connectivity as a Measure of Power System Integrity
(Materials and Energy Research Center, 19880801)Measures of network structural integrity useful in the analysis and synthesis of power systems are discussed. Signal flow methodology is applied to derive an expression for the paths between sources and sinks in a power ...

Simulation of Low Reynolds Number Isotropic Turbulence Including the Passive Scalar
(Materials and Energy Research Center, 19880801)Full simulations of homogeneous isotropic turbulence containing a homogeneous passive scalar were made at low Reynolds numbers and various Prandtl numbers. The results show that the spectral behavior of the two fields are ...

A MicrocomputerBased Simulator for Digital Control Systems
(Materials and Energy Research Center, 19880801)A microcomputerbased simulator for digital control systems is proposed. The proposed simulator is a hybrid system in which the plant is simulated by conventional method of analog computers and other parts of the system ...

Chained Vector Simplex
(Materials and Energy Research Center, 19880801)An algorithm for solving linear programming problems whose matrix of coefficients contains a large number of "zero" entries is studied. This algorithm is more useful when it is generated as a subprogram in a realtime ...

Resurgent Cauldrons and Their mineralization between Narigan, Esfordi, Kushk, and Seh Chahoon, Central Iran
(Materials and Energy Research Center, 19880801)

Overview of Reverse Osmosis for Chemical Engineers Part 1, Fundamentals of Membrane Mass Transfer
(Materials and Energy Research Center, 19881101)Reverse osmosis (RO). has become a standard unit operation in Chemical Engineering. This separation process can be used for a wide variety of applications including: desalination of sea water, treatment of industrial wastes, ...

Average Heat Transfer Coefficient in Rectangular Ducts with Baffle Blockages
(Materials and Energy Research Center, 19881101)An experimental investigation was conducted to study the average and the fullydeveloped heat (mass) transfer coefficients in a rectangular smooth duct and a duct with repeatedbaffle blockages. The focus of attention in ...

A Partially Observable Markovian Maintenance Process with Continuous Cost Functions
(Materials and Energy Research Center, 19881101)In this paper a twostate Markovian maintenance process where the true state is unknown will be considered. The operating cost per period is a continuous random variable which depends on the state of the process. If ...