The Experts below are selected from a list of 3699426 Experts worldwide ranked by ideXlab platform
Ira M Cohen - One of the best experts on this subject based on the ideXlab platform.
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oscillatory enhancement of the squeezing flow of yield stress fluids a novel Experimental Result
Journal of Fluid Mechanics, 1997Co-Authors: Kenneth John Zwick, P S Ayyaswamy, Ira M CohenAbstract:The extrusion of a yield stress fluid from the space between two parallel plates is investigated Experimentally. Oscillating the magnitude of the squeezing force about a mean value ( F = f [1+αcos(ω t )]) was observed to significantly enhance the flow rate of yield stress fluids, while having no effect on the flow rate of Newtonian fluids. This is a novel Result. The enhancement depends on the magnitude of the force, the oscillatory frequency and amplitude, the fluid being squeezed, and the thickness of the fluid layer. Non-dimensional Results for the various flow quantities have been presented by using the flow predicted for the constant-force squeezing of a Herschel–Bulkley yield stress fluid as the reference. In the limit of constant-force squeezing, the present Experimental Results compare very well with those of our earlier theoretical model for this situation (Zwick, Ayyaswamy & Cohen 1996). The Results presented in this paper have significance, among many applications, for injection moulding, in the adhesive bonding of microelectronic chips, and in surgical procedures employed in health care.
Romeo Ortega - One of the best experts on this subject based on the ideXlab platform.
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an Experimental Result on stabilization via immersion and invariance the cart pendulum system
European Control Conference, 2009Co-Authors: Ioannis Sarras, Houria Siguerdidjane, Romeo OrtegaAbstract:The Immersion and Invariance (I&I) methodology for stabilization of nonlinear systems has shown a great efficiency from a theoretical point of view. Nevertheless, it is important to show its applicability level. This paper is thus devoted to the Experimental validation of the application of a state-feedback controller derived by the I&I methodology. The application consists of the well-known academic example of the inverted pendulum on a cart. First, it is shown that theoretically the I&I controller can stabilize the system by considering an initial position of the pendulum angle very close to the horizontal axis, condition which cannot be met previously by means of other control schemes. Moreover, it is shown that the controller designed herein is simpler than others described in previous research works. Finally, it is pointed out that taking into consideration the presence of friction in the Experimental set-up is crucial for attaining the required performance and maintaining a good level of stabilization robustness.
Kenneth John Zwick - One of the best experts on this subject based on the ideXlab platform.
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oscillatory enhancement of the squeezing flow of yield stress fluids a novel Experimental Result
Journal of Fluid Mechanics, 1997Co-Authors: Kenneth John Zwick, P S Ayyaswamy, Ira M CohenAbstract:The extrusion of a yield stress fluid from the space between two parallel plates is investigated Experimentally. Oscillating the magnitude of the squeezing force about a mean value ( F = f [1+αcos(ω t )]) was observed to significantly enhance the flow rate of yield stress fluids, while having no effect on the flow rate of Newtonian fluids. This is a novel Result. The enhancement depends on the magnitude of the force, the oscillatory frequency and amplitude, the fluid being squeezed, and the thickness of the fluid layer. Non-dimensional Results for the various flow quantities have been presented by using the flow predicted for the constant-force squeezing of a Herschel–Bulkley yield stress fluid as the reference. In the limit of constant-force squeezing, the present Experimental Results compare very well with those of our earlier theoretical model for this situation (Zwick, Ayyaswamy & Cohen 1996). The Results presented in this paper have significance, among many applications, for injection moulding, in the adhesive bonding of microelectronic chips, and in surgical procedures employed in health care.
Zhang Danron - One of the best experts on this subject based on the ideXlab platform.
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Statistical analysis of the Experimental Result of dinoseb adsorption by soil
Environmental Pollution & Control, 2012Co-Authors: Zhang DanronAbstract:The soil samples were collected from different places to study the influences of soil characteristic factors on dinoseb adsorption capacity coefficient by using different statistical methods.With the help of stepwise regression analysis,the soil characteristic factors which have little influence on the adsorption parameter were excluded,and then,the factors that have direct influences on dinoseb adsorption capacity coefficient were analyzed through path analysis.Finally,the best regression equation of adsorption parameters with soil characteristic factors was fitted.Organic carbon and clay were considered as the most significant soil factors which affect the dinoseb adsorption process.92% of the variation of dinoseb sorption coefficient could be attributed to the variation of the soil organic carbon content and clay.
Ioannis Sarras - One of the best experts on this subject based on the ideXlab platform.
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an Experimental Result on stabilization via immersion and invariance the cart pendulum system
European Control Conference, 2009Co-Authors: Ioannis Sarras, Houria Siguerdidjane, Romeo OrtegaAbstract:The Immersion and Invariance (I&I) methodology for stabilization of nonlinear systems has shown a great efficiency from a theoretical point of view. Nevertheless, it is important to show its applicability level. This paper is thus devoted to the Experimental validation of the application of a state-feedback controller derived by the I&I methodology. The application consists of the well-known academic example of the inverted pendulum on a cart. First, it is shown that theoretically the I&I controller can stabilize the system by considering an initial position of the pendulum angle very close to the horizontal axis, condition which cannot be met previously by means of other control schemes. Moreover, it is shown that the controller designed herein is simpler than others described in previous research works. Finally, it is pointed out that taking into consideration the presence of friction in the Experimental set-up is crucial for attaining the required performance and maintaining a good level of stabilization robustness.
