The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
The main objective of this paper is to provide efficient and accurate sediment transport models and especially the bedload sediment tranport due to water evolution. The model is obtained by coupling the hydrodynamical component and the morphodynamical one. As our goal is to study coastal media, we chose the ShallowWater equations for the first component. For the other component the choice of the Exner...
Considering the perturbation within a wide range of flight parameter (such as height, mach), and the strong uncertainty of aerodynamic and atmospheric parameter, a LPV(Linear Parameter-Varying) control method is studied for a RLV(Reusable Launch Vehicle) during reentry, which can make the controller designed envelope-oriented and obtain the self-scheduled ability. A standard LPV controller design...
Simulating the accompanying turbulent details of fluid-solid coupling is still challenging, as numerical dissipation always plagues current fluid solvers. In this paper, we propose a novel particle-based method to simulate turbulent details generated behind objects in SPH fluids. A turbulence production model, approximating the boundary layer theory on the fly in SPH fluids, is proposed to identify...
Electromagnetic cavity-resonance modes in parallel-plate planes of power and ground rectangular structures along with parasitic coupling between excitation RF multiports are investigated. Such structures are widely used in microwave multilayer packages, MCMs and could be the source of considerable electromagnetic interference (EMI). Effective methods should be applied for damping and elimination of...
The phase field method is an effective method on solidification microstructure simulation. In this paper, the basic principles and the phase field model are introduced respectively. And then, the applications of phase-field simulation on solidification microstructure are summarized briefly. Finally, the problems to be faced and the future development trends are pointed out in this area.
Previous studies of cardiac electromechanical coupling have largely focused on myocytes, while fibroblasts have not been widely concerned. This study aimed to verify possible influences of fibroblasts on cardiac electro-mechanics with a real coupled cube model. At the cellular level, the ten Tusscher mathematical model of the human ventricular myocyte and the passive fibroblast model were combined...
A set of PRS-XY Serial-Parallel PKM(Parallel Kinematic Machine) is presented in this paper. The mechanism is made up of a set of 3-PRS parallel mechanism and an X-Y table. Both the direct and inverse kinematics model are established based on the Kinematics analysis for PRS-XY platform. The numerical analysis is also implemented and the kinematics model is proved to be correct by means of numerical...
This paper proposes a new approach to analyze crosstalk of coupled interconnects in the presence of process variations. The suggested method translates correlated process variations into orthogonal random variables by principle component analysis (PCA). combined with polynomial chaos expression (PCE), the technique utilizes Stochastic Collocation Method (SCM) to analyze the system response of coupled...
A novel methodology for accurate and efficient static timing analysis is presented in this paper. The methodology is based on finding a frequency domain model for the gates which allows uniform treatment of the gates and interconnects. It is shown that despite the highly nonlinear overall gate model, a frequency domain model of the gate with the model parameters, gate moments, as functions of the...
This paper considers an alternative strategy to speed up the circuit simulation. This strategy considers characteristics of simulator users' behaviors and involves two techniques, the incremental simulation and simulation-on-demand (SOD). These techniques are implemented in an "Interactive Simulation Environment" to dramatically accelerate the simulation speed in most practical cases. Also,...
In part I we have set the fundamental physical bases of a general treatment of superexchange for 3dn-metallic cations A and B (1lesnles9) characterized by sigma-type bonds on both sides of the diamagnetic bridge X without the presence of a pi-type orbital (with here A=B or AneB). In addition we have shown that, due to the electron-hole symmetry, the study may be restricted to the case of 3dn-ions...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.