A New Global Ionospheric Electron Density Model Based on Grid Modeling Method

mortality forecasting based on lee-carter model

over the past decades a number of approaches have been applied for forecasting mortality. in 1992, a new method for long-run forecast of the level and age pattern of mortality was published by lee and carter. this method was welcomed by many authors so it was extended through a wider class of generalized, parametric and nonlinear model. this model represents one of the most influential recent d...

A New Adaptive Grid Method Based on Iterative Grid Redistribution

We introduce an iterative grid redistribution method based on the variational approach which enables us to gain more precise control of the grid distribution near the regions of large solution variations. The method is particularly effective for solving PDEs with singular solutions (e.g. blow up solutions).

Global Assimilative Ionospheric Model

The long-term goal of our research is to develop a reliable and accurate global ionospheric weather monitoring and forecast system which can serve as a prototype for an operational system. To achieve this goal, we are developing and validating advanced data assimilation techniques to analyze diverse sources of ionospheric measurements. The assimilation of ionospheric measurements into mature fi...

Multiresolution Tomography of Ionospheric Electron Density

Global optimization of mixed-integer polynomial programming problems: A new method based on Grobner Bases theory

Mixed-integer polynomial programming (MIPP) problems are one class of mixed-integer nonlinear programming (MINLP) problems where objective function and constraints are restricted to the polynomial functions. Although the MINLP problem is NP-hard, in special cases such as MIPP problems, an efficient algorithm can be extended to solve it. In this research, we propose an algorit...