Volume 3, Issue 3

 

ارسال های اخیر

  • Modeling Flexibility Effects in Robotic Arms Via the Modified 4x4 D-H Homogeneous Transformation 

    Shahinpoor, M.؛ Meghdari, Ali (Materials and Energy Research Center, 1990-11-01)
    This paper presents a method for the kinematical modeling of robot manipulator arms with flexible members. Development of such techniques are important for the improvement of robotic arms precision performance and their ...

  • An Experiment study concerning Natural convection frome a Horizontal Thin wire 

    Etemad, M.؛ Molki, Majid (Materials and Energy Research Center, 1990-11-01)
    An experimental investigation was carried out to determine heat transfer coefficients for natural convection from a heated horizontal wire. The heating is provided by electrical current, and the temperature of the wire is ...

  • Earthquake Analysis of Spatial Rod Systems 

    Farshad, M.؛ Karami, Ghodratollah (Materials and Energy Research Center, 1990-11-01)
    A master element to be employed as a general spatial rod finite element is presented. This spatially curved and pretwisted element can have variable cross-section and variable curvature change. It may also be resting on ...

  • Separation of Ultra - Fine Sulphur Particles from Nta Dispersion by Aphron Flotation 

    Chalkosh Amiri, M. (Materials and Energy Research Center, 1990-11-01)
    Oxidative scrubbing is used to remove H2S from gas streams. A key problem in regeneration of the absorbent is the removal of fine particles of sulphur from the suspension of the scrubbing liquid. Dispersions of ultra-fine ...

  • Minimizing the Mean Tardiness in A N1 Sequencing Problem 

    Fallah, H.؛ Ghasemi Tari, F. (Materials and Energy Research Center, 1990-11-01)
    This paper considers the problem of minimizing the mean tardiness of N jobs when the jobs are scheduled on a single machine. A simple algorithmic procedure is develop to obtain an optimal or a near optimal sequence for the ...

  • A New Vapor Pressure Equation 

    Bozarjomehri, R. B.؛ Edalat, M. (Materials and Energy Research Center, 1990-11-01)
    The Wagner equation for prediction of vapor pressure has been modified in order to improve it accuracy. On the basis of this modifications, development of a new equation for prediction of vapor pressure is outlined. Examples ...

  • An Adaptive Impedance Controller for Robot Manipulators 

    Postigo, J. F. (Materials and Energy Research Center, 1990-11-01)
    A desired dynamic behavior of constrained manipulators can be achieved by means of impedance control and various implementations of fixed controllers have been proposed. In this paper, and adaptive implementation is presented ...

  • Dealloying and Stress Corrosion Craking of Copper Alloys in Cu(I) Solutions 

    Newman, R.C.؛ Shahrabi, T. (Materials and Energy Research Center, 1990-11-01)
    Natural cases of dealloying or stress-corrosion cracking in copper alloys normally occur in oxygenated solutions, where the cathodic reactant is O2 or Cu2+. Within cavities or under deposits, the local environment is ...

  • Oxidative Coupling of Methane to Ethylene Over Sodium Promoted Manganese Oxide 

    Bagherzadeh, E. (Materials and Energy Research Center, 1990-11-01)
    Manganese oxide catalyst promoted with sodium and supported on silica exhibits fairly good activity and selectivity towards the synthesis of ethylene from methane at the optimum operating conditions. Methane and oxygen ...

  • Optimum Aggregate Inventory in the Lot Scheduling Problem with Non-Zero Setup Time 

    Haji, Rasoul (Materials and Energy Research Center, 1990-11-01)
    In this paper, the minimization of the maximum aggregate inventory of all products for the common cycle time approach to the scheduling problem of a multi-products single machine system is considered. In the case of non-zero ...

  • Compound Strip Method for Plane Stress 

    Maleki, S. (Materials and Energy Research Center, 1990-11-01)
    The compound strip method (CSM) for plates is an expansion of the finite strip method (FSM) and was developed to incorporate the effects of the support elements in the analysis of linear elastic plate systems. In this paper ...