We study in this article the large time asymptotic structural stability and structural evolution in the physical space for the solutions of the 2-D NavierStokes equations with the periodic boundary conditions. Both the Hamiltonian and block structural stabilities and structural evolutions are considered, and connections to the Lyapunov stability are also given.

application of modern irrigation and drainage canals for efficient use of water resources is necessary. thus , identifying the factors influencing farmers ’ attitudes toward participation in irrigation and drainage projects (idp) is essential. the purpose of this study is to identify factors affecting attitude toward participation in idp in syakh darenjan, fars province , iran. stratified rando...

This paper looks at one important part of econometric methodology: identification. Put generally, relations that hold among observable and unobservable entities are identifiable if given some a priori knowledge about the relations, previously unknown characteristics of those relations can be deduced from observations. Typically in the econometrics literature, the identification problem is prese...

I show that the compound modified Korteweg-de Vries-Sine-Gordon equations describe pseudospherical surfaces, that is, these equations are the integrability conditions for the structural equations of such surfaces. I obtain the self-Bäcklund transformations for these equations by a geometrical method and apply the Bäcklund transformations to these solutions and generate new traveling wave soluti...

Flexible flapping wings have garnered a large amount of attention within the micro aerial vehicle (MAV) community: a critical component of MAV flight is the coupling of aerodynamics and structural dynamics. This paper presents a computational framework for simulating shell-like wing structures flapping in incompressible flow at low Reynolds numbers in both hover and forward flight. The framewor...

This work couples a computational fluid dynamics (CFD) code and rotorcraft computational structural dynamics (CSD) code to calculate helicopter rotor airloads across a range of flight conditions. An iterative loose (weak) coupling methodology is used to couple the CFD and CSD codes on a per revolution, periodic basis. The CFD uses a high fidelity, Navier-Stokes, overset grid methodology with fi...