Abstract: Methods and systems for determining a well shut-in pressure of oil and gas well drilling are provided. The method comprises: obtaining, by a first processor, a basic parameter of a target oil and gas well, the basic parameter including at least one of a wellbore structure parameter, a well drilling fluid performance parameter, or a casing string parameter; obtaining, by the first processor, a pressure calculation model; and determining, by the first processor, a maximum well shut-in pressure during well drilling of the target oil and gas well based on the pressure calculation model and the basic parameter.

Abstract: A method for determining a level of solar radiation at a point of interest (POI). Multiple sky images are captured by a distributed network of digital cameras. Sun location parameters are determined. A three-dimensional (3D) sky model is generated based on the sky images. Generating the 3D sky model includes generating 3D object data based on the sky images to model one or more objects in a region of sky, and generating position data to model a position of the one or more objects in the region of sky. A level of solar radiation at the POI is determined based on the position data and 3D object data of the 3D sky model and the sun location parameters.

Abstract: A method for determining a level of solar radiation at a point of interest (POI). Multiple sky images are captured by a distributed network of digital cameras. Sun location parameters are determined. A three-dimensional (3D) sky model is generated based on the sky images. Generating the 3D sky model includes generating 3D object data based on the sky images to model one or more objects in a region of sky, and generating position data to model a position of the one or more objects in the region of sky. A level of solar radiation at the POI is determined based on the position data and 3D object data of the 3D sky model and the sun location parameters.

Abstract: A method of extracting computer graphical objects including at least one vessel structure from a data volume of a portion of an anatomy, the method comprising the steps of: utilizing knowledge based image processing to locate centerlines and utilizing an active surface technique to extract the outer surface of said vessel structure; and storing co-ordinate information of said outer surface for subsequent display.

Abstract: A method of extracting computer graphical objects including at least one vessel structure from a data volume of a portion of an anatomy, the method comprising the steps of: utilising knowledge based image processing to locate centrelines and utilising an active surface technique to extract the outer surface of said vessel structure; and storing co-ordinate information of said outer surface for subsequent display.