Abstract: The present invention generally relates to a system optimization procedure. The method includes a) providing, via an input channel, a system model for modelling the chemical mixture, which associates a set of design parameters with a plurality of objective parameters that represent design characteristics of the chemical mixture, wherein the set of design parameters comprises a chemical mixture recipe having two or more ingredients, and the plurality of objective parameters comprises two or more physicochemical properties of the chemical mixture; b) defining, via the input channel, a set of primary optimization objective parameters, c) performing, by a processor, a multi-objective optimizing process on the system model by exploring a plurality of design configurations by assigning specified values to the set of design parameters; and d) determining, by the processor, if the multi-objective optimizing process yields a degenerated multi-objective optimal design.

Abstract: A coal winning machine with a mechanical tool has a tool body provided with one or more projecting flanges helically surrounding the axis of rotation of the tool body. Cutting tools are provided, each having a linear cutting edge, and these are removably mounted on the flange or flanges in such a manner that they can assume at least two alternative positions in each of which the cutting edge of the respective tool defines a different cutting angle.