Continuous data assimilation for displacement in a porous medium

Interfacial stability of immiscible displacement in a porous medium.

Oil displacement through a porous medium with a temperature gradient.

We investigate the effect of a temperature gradient on oil recovery in a two-dimensional pore-network model. The oil viscosity depends on temperature as μ(o) [Please see text] e(B/T), where B is a physicochemical parameter, depending on the type of oil, and T is the temperature. A temperature gradient is applied across the medium in the flow direction. Initially, the porous medium is saturated ...

Continuous Data Assimilation with Stochastically Noisy Data

We analyze the performance of a data-assimilation algorithm based on a linear feedback control when used with observational data that contains measurement errors. Our model problem consists of dynamics governed by the two-dimension incompressible Navier–Stokes equations, observational measurements given by finite volume elements or nodal points of the velocity field and measurement errors which...

Determining Modes for Continuous Data Assimilation in 2D Turbulence

1 Department of Mathematics, University of California, Irvine, California 92697. 2 Department of Mathematics, University of Nevada, Reno, Nevada 89557; e-mail: ejolson @unr.edu 3 Mechanical and Aerospace Engineering, University of California, Irvine, California 92697. 4 Department of Computer Science and Applied Mathematics, Weizmann Institute of Science, Rehovot 76100, Israel. Received August ...

a new approach to credibility premium for zero-inflated poisson models for panel data

هدف اصلی از این تحقیق به دست آوردن و مقایسه حق بیمه باورمندی در مدل های شمارشی گزارش نشده برای داده های طولی می باشد. در این تحقیق حق بیمه های پبش گویی بر اساس توابع ضرر مربع خطا و نمایی محاسبه شده و با هم مقایسه می شود. تمایل به گرفتن پاداش و جایزه یکی از دلایل مهم برای گزارش ندادن تصادفات می باشد و افراد برای استفاده از تخفیف اغلب از گزارش تصادفات با هزینه پائین خودداری می کنند، در این تحقیق ...