Congrès International d'Architecture Moderne

About: Congrès International d'Architecture Moderne is a based out in . It is known for research contribution in the topics: Boundary value problem & Jet (fluid). The organization has 393 authors who have published 403 publications receiving 4104 citations.

Maximum number of limit cycles of cubic lie´nard differential system

Abstract: The number of limit cycles of the cubic Lie´nard polynomial differential system of the form x˙ = y, y˙ = - g(x)- f (x)y is examined, where f (x) is a polynomial of degree three and g(x), a polynomial of degree one and two. The accurate upper bound of the maximum number of limit cycles of this Lie´nard differential system is obtained. By using the first order averaging theory, this system is shown to bifurcate from the periodic orbits of the linear center x˙ = y, y˙= -x. The maximum number of limit cycles of the differential system is found to be unique.

Fluid mechanics of the descemet's membrane detachment with spontaneous reattachment

Abstract: Descemet membrane detachment (DMD) often happen during catatact surgery. DMD is developed when the membrane separate from the stroma. The separation occur,is due to the flow of aqueous humour (AH) from the aqueous chamber into the descrement membrance (DM) space through a break. A mathematical model of buoyancy driven AH flow is developed to explain the mechanisms of the fluid. The exisiing of temperature different between the comea and the pupil will drive the fluid to flow due to tuoyancy force. The effect of the fluid flow to the deformation of the detach membrane is analyzed. The phenomena of spontaneous reattachment of the DMD will be studied. Numerically, the relevant variables will be computed using finite element method with the aiding of COMSOL Multiphysics. The results have shown that the flowing of AH affect the displacement of the detach membrane and the spontaneous reattachment may indeed occur under certain conditions.

Community noise reduction of supersonic business jet

Abstract: The "low noise" aircraft-propulsion system control is defined in such a way as to achieve community noise reduction during takeoff and initial climb of supersonic business jet (SSBJ). The conducted low noise aircraft-propulsion system control contains special low noise propulsion system control to obtain a minimum of cumulative noise level and low noise aircraft control to obtain low noise initial flight path. The low noise control must take into account all airworthiness standards restrictions and provide the market demand requirements to SSBJ. The efficiency comparison of conventional aircraft-engine control, which is used for subsonic passenger jet and the low noise aircraftpropulsion system control is understood from the perspective of minimum noise in the community. The integrated aircraft-propulsion system control is applied to the SSBJ project with 6-10 passengers. Research has shown the technical feasibility of satisfaction of new stringent market demands on a community noise level of SSBJ.