Cement Production at Deva Cement Factory from Romania
This paper describes the experiences relating to the modernization of the production process and environmental protection at Deva Cement Factory, Carpatcement Holding S.A. The production process, equipments and installations improvement was considered. Besides the technological flow modernization measures, the company adopted certain solutions for improving the performances linked to the technological process automation and optimal control. A local control in each particular operation and an optimum control of entire plant are enforced. The technological flow on-line simulation and control through specific software in order to get optimal process parameters represent possibilities of improving the performances.
Probabilistic Model Simulation in Cement Process Fabrication at Casial Factory
This paper will propose to investigate results obtained from automated measuring process control of temperature in cement fabrication with the simulation modeling by probability distribution functions and conducted at yield goodness of fit results. The simulation’s results enable the comparison with the data obtained by automated real-time project process data which are used in classical analyses of manufacturing process for economical and technical management decision.
Mechanics of deformable directed surfaces
Abstract The paper develops a simple, yet complete and consistent non-linear dynamic thermo-elastic shell theory based on the concepts of a two-dimensional directed continuum. The constitutive equations are postulated in a general form. Stress-strain relations are derived using the equation of energy balance and the two entropy production inequalities, which are rewritten in a special form. The linear theory is discussed in detail. The structure of the stress-strain relations is presented in the most general form and then specialized to concrete examples, in particular, to the classical shell theory, using their invariance properties with respective to certain symmetry groups. The elastic moduli are determined by demanding the coincidence of the frequency dispersion surfaces obtained using the two-dimensional theory with the lowest foils of the corresponding surfaces resulting from the three-dimensional theory of elasticity.