Abstract: The present disclosure relates to a device and method for continuous mixing of a solid drag reducer. The device for continuous mixing of a solid drag reducer comprises a raw material storage device (1), a pneumatic raw material delivery device (2), a power device (3), a flow testing device (4) and a dissolving device (5). The method for continuous mixing of a solid drag reducer uses the device for continuous mixing of a solid drag reducer, which can realize continuous mixing of the solid drag reducer during large-scale volume fracturing.

Abstract: A method of processing 2D graphics comprising generating a perspective projection of a 2D graphics by scaling the 2D graphics with a variable ratio, wherein scaling the 2D graphics with the variable ratio comprises interpolating the graphics with a filter, such that a point xp in the perspective projection is generated from a point x0 in the 2D graphics with a following equation x0=1/R(j)*xp+Ph(j), wherein j represents a line index of the point x0, 1/R(j) represents a scaling factor of a length in the 2D graphics versus a length in the perspective projection, and Ph(j) represents a phase shift.

Abstract: A method of processing 2D graphics comprising generating a perspective projection of a 2D graphics by scaling the 2D graphics with a variable ratio, wherein scaling the 2D graphics with the variable ratio comprises interpolating the graphics with a filter, such that a point xp in the perspective projection is generated from a point x0 in the 2D graphics with a following equation x0=1/R(j)*xp+Ph(j), wherein j represents a line index of the point x0, 1/R(j) represents a scaling factor of a length in the 2D graphics versus a length in the perspective projection, and Ph(j) represents a phase shift.