A correction apparatus reduces time and labor, reduces an artificiality, and improves reproducibility of correction by correcting a shift of a profile with an automatically estimated correction amount. A correction apparatus for correcting a profile of X-ray powder diffraction comprises processing circuitry configured to set a reference profile, set an estimation method for estimating a correction amount related to a sample height, estimate the correction amount based on the estimation method, and correct a subject profile based on the correction amount, wherein the correction amount is a value that maximizes a degree of coincidence between the corrected subject profile and the reference profile.

A calculation apparatus, a system, a method, and a program for simply estimating an orientation direction from a two-dimensional diffraction image and calculating a structural model of a polymer are provided. A calculation apparatus for calculating a structural model of a polymer comprises a data acquiring section for acquiring a two-dimensional diffraction image and crystal structure data, an initial structural model generating section for generating an initial structural model including one crystallite, and a crystallite direction calculating section for calculating a direction of the crystallite, wherein the direction of the crystallite is calculated based on a two-dimensional diffraction image calculated from the initial structural model and the measured two-dimensional diffraction image.

A method for obtaining mechanical properties of a rock sample. The method includes measuring a bulk density and a total porosity of the rock sample; identifying mineral phases and measuring volume fractions of the mineral phases relative to total volume of the rock sample; inputting the bulk density, the total porosity, and the volume fractions into a computational model executing on a computing system; processing the data into the computational model; determining static and dynamic mechanical properties of the rock sample; identifying oil and gas reservoir based on the dynamic mechanical properties; estimating reserve of the oil and gas reservoir based on the dynamic mechanical properties of the rock sample; designing effective production strategies for the oil and gas reservoir based on the static mechanical properties; and selecting appropriate drilling tools and hydraulic fracturing operations for the oil and gas reservoir based on the static mechanical properties.