Abstract:
The present invention is a method for determining the position of a source emitting at least one of a gaseous compound and particles in a geographical area, comprising measuring the gaseous compound concentration, the wind direction and speed for different predefined consecutive geographical positions to deviate by at most 45° from an instantaneous or average wind direction. At least one pair of a consecutive minimum and maximum of the curve is subsequently determined, and the position of the emission source is determined from the positions of the mobile measurement system corresponding to the maxima of the pairs, the time gaps between the maximum and minimum of the pairs, and average wind speeds and directions between the minimum and maximum of the pairs.
Abstract:
The invention is a method for exploiting a subterranean medium, according to an exploitation scheme defined on a representation of the medium based on a two-dimensional grid representing the subterranean medium. The quality of the mesh cells of the grid is optimized by displacing the nodes of the grid by a procedure for minimizing the deformation of the grid by generating a reference grid; imposing a displacement of at least one node, termed a rigid node, of the reference grid on a corresponding node in the grid to be optimized; and constructing an optimized two-dimensional grid by displacement of the other nodes of the reference grid, while minimizing the displacement field of the nodes.