Abstract: The present disclosure provides a magnesium alloy and a preparation method thereof. The magnesium alloy comprises: Al: 7.01-9.98 wt %; Zn: 0.1-1.2 wt %; Mn: 0.05-0.2 wt %; Sn: 0.3-2.5 wt %; Sm: 0.1-0.5 wt %; and a balance of Mg.

Abstract: A plastic wrought magnesium alloy includes a Mg—Al—Bi—Sn—Ca—Y alloy, prepared from the following chemical components in percentage by mass: 3 to 6.0% of Al, 1 to 3.0% of Bi, 0.5 to 2.0% of Sn, 0.02 to 0.05% of Ca, 0.02 to 0.05% of Y and the balance of Mg, in which the percentage sum of Ca and Y elements is more than 0.05% and less than 0.1%.

Abstract: A high-strength and high-toughness magnesium alloy includes a Mg—Al—Bi—Sb—Zn—Sr—Y—Mn alloy, prepared from the following components in percentage by mass: 7.0 to 10.0% of Al, 0.2 to 2.0% of Bi, 0.2 to 0.8% of Sb, 0.2 to 0.5% of Zn, 0.1 to 0.5% of Sr, 0.03 to 0.3% of Y, 0.05 to 0.1% of Mn and a balance of Mg.

Abstract: A high-efficiency, tandem biaxial dynamic sorting and return powder milling device with automatic baffle regulation, which is used for the sorting of a gas-solid two-phase fluid of an air-powder mixture, is provided. A circle of milling gears for staged milling of return powders is mounted in an annular cavity between an outer conical housing and an inlet pipe; an axial flow airfoil-type vane is fitted on an outer side of a lower part of an inner conical body which is, as a whole, driven into rotation by a variable frequency motor; a movable vane rotor for centrifugal sorting is fixedly fitted on an outer side of a top cone; and the degrees of opening of first-stage baffles and second-stage baffles are respectively controlled and regulated by an automatic baffle regulating mechanism.

Abstract: The present invention provides a method for preparing a matte anti-fingerprint stainless steel decorative plate. The method comprises the steps of: 1) selecting a polymer coating material, wherein the polymer coating material is formed by mixing a film forming material, an inorganic nano-filler, a solvent and an auxiliary agent, wherein the film forming material comprises the following ingredients based on the weight ratio: 30-50 parts of acrylate composite resin, 5-20 parts of amino resin, and 5-15 parts of epoxy resin; and 1-8 parts of a matting agent and 1-8 parts of an anti-settling agent are added; and 2) performing a spray coating using the polymer coating material, wherein a coating film has a thickness of 1.5-2.5 ?m, the precision of the atomization air pressure of a spray gun is controlled at ±0.

Abstract: The present invention provides a method for preparing a matte anti-fingerprint stainless steel decorative plate. The method comprises the steps of: 1) selecting a polymer coating material, wherein the polymer coating material is formed by mixing acrylic resin, a film forming material, an inorganic nano-filler, a solvent and an auxiliary agent, wherein the film forming material comprises the following ingredients based on the weight ratio: 30-50 parts of acrylate composite resin, 5-20 parts of amino resin, 5-15 parts of epoxy resin, 1-5 parts of an inorganic nano-filler, 40-50 parts of a solvent and 10-20 parts of an auxiliary agent; and 1-8 parts of a matting agent and 1-8 parts of an anti-settling agent are added; and 2) performing a spray coating using the polymer coating material, wherein a coating film has a thickness of 1.5-2.5 ?m, the precision of the atomization air pressure of a spray gun is controlled at ±0.

Abstract: Processing a circuit design can include determining a first set of net sensitivity ranges for a net of the circuit design, wherein at least two net sensitivity ranges of the first set are partially overlapping, and translating the first set of net sensitivity ranges into a second set of net sensitivity ranges comprising a plurality of member net sensitivity ranges with no partially overlapping member net sensitivity ranges. A net sensitivity tree can be constructed that includes hierarchically ordered nodes. Each node can specify a net sensitivity range of one member of the second set of net sensitivity ranges.