Abstract: A method for preparing a cap-layer-structured gallium oxide field effect transistor, includes: removing a gallium oxide channel layer and a gallium oxide cap layer from a passive area of a gallium oxide epitaxial wafer; respectively removing the gallium oxide cap layer corresponding to a source region of the gallium oxide epitaxial wafer and the gallium oxide cap layer corresponding to a drain region of the gallium oxide epitaxial wafer; respectively doping a portion of the gallium oxide channel layer corresponding to the source region and a portion of the gallium oxide channel layer corresponding to the drain region with an N-type impurity; respectively capping an upper surface of the gallium oxide channel layer corresponding to the source region and an upper surface of the gallium oxide channel layer corresponding to the drain region with a first metal layer to respectively form a source and a drain; and forming a gate.

Abstract: The invention relates to mix composition determination method of coarse graded high modulus asphalt concrete with skeleton embedded structure, which belongs to the road engineering design field. The invention use low labeled hard asphalt AH-30# with penetration degree no greater than 30 (0.1 mm); the nominal maximum aggregate size no smaller than 26.5 mm; building mineral aggregate gradation of the mix using course aggregate gap gradation; using gradation design method of asphalt mixture based on closest compact condition to select the optimal oil-stone ratio.

Abstract: The invention involves “a method to structure mineral aggregate gradation by using three control points & two curves”, including the following steps: (1) Three control points are determined according to the property of the mixtures: nominal maximum size of aggregate and its passing rate, nominal minimum size of aggregate and its passing rate, and the discontinuity point between the coarse aggregate and the fine aggregate and its passing rate. (2) The grading curves of the coarse and the fine aggregate are selected respectively with Power function model, Exponential function model and Logarithmic function model. (3) Measure the stamped density and the stamped voids in mineral aggregate, and then choose the grading of the coarse and the fine aggregate on the basis of the project need. The invention can help constitute different gradation curves in line with local materials from different areas and sources.

Abstract: The invention relates to ‘mix composition determination method of coarse graded high modulus asphalt concrete with skeleton embedded structure’, which belongs to the road engineering design field. The invention use low labeled hard asphalt AH-30# with penetration degree no greater than 30 (0.1 mm); the nominal maximum aggregate size no smaller than 26.5 mm; building mineral aggregate gradation of the mix by the idea of course aggregate gap gradation; using gradation design method of asphalt mixture based on closest compact condition to select the optimal oil-stone ratio.