Abstract: Technical knowledge which is difficult for the expert to express in words or numerical form is predicted and reproduced. A technical knowledge prediction apparatus according to one embodiment of the present invention includes a problem setting unit configured to automatically create and set a problem which includes a control factor of a manufacturing step, and a variable of the control factor, an answer acquiring unit configured to acquire an answer with respect to the problem and indicating a decision of the manufacturing step, a query acquiring unit configured to acquire a query, and a prediction output unit configured to predict and output an answer corresponding to the query acquired by the query acquiring unit, based on a corresponding relationship between the problem and the answer.

Abstract: A material design device derives the optimal solution for a design condition satisfying a desired material property. A design condition setting unit for setting a specified range of a design condition of a material to be designed. A comprehensive prediction point generation unit generates a plurality of comprehensive prediction points within the specified range set by the design condition setting unit. A design condition-material property table stores data sets in which each point of the comprehensive prediction points is associated with a material property value calculated by inputting the comprehensive prediction points generated by the comprehensive prediction point generation unit, to a learned model. A required property setting unit sets a specified range of a required property of the material. A design condition extraction unit extracts, from the design condition-material property table, a data set satisfying the required property set by the required property setting unit.

Abstract: A method of manufacturing an aluminum extruded raw pipe capable of suppressing the surface roughness of the extruded raw pipe and a method of manufacturing an aluminum pipe to be used as a photosensitive drum excellent in surface quality are provided. In a method of manufacturing an aluminum extruded raw pipe by extruding an aluminum billet 1, as the billet 1, a billet whose maximum value of the thickness T of the solidified shell layer 2 of the external peripheral surface is 13 mm or less is used. By subjecting the obtained aluminum extruded raw pipe to a drawing process or an ironing process, an aluminum pipe equipped with surface quality preferable to a photosensitive drum can be obtained.