Abstract: The present disclosure provides an aluminum alloy workpiece and a preparation method thereof. By optimizing a composition of the aluminum alloy workpiece, the aluminum alloy workpiece can be prepared by laser powder bed fusion (LPBF) in the preparation method, thereby forming a target metallographic phase. The preparation method overcomes the problem that the composition of a high temperature-resistant and high-strength aluminum alloy designed based on the traditional casting and forging process cannot be matched with the LPBF, and makes full use of rapid cooling of the LPBF to prepare an aluminum alloy composition of a target crystal phase. The preparation method combines the aluminum alloy composition with the LPBF to achieve mutual promotion, thereby forming a target workpiece, such that an aluminum alloy with high strength and toughness at room temperature/high temperature can be prepared by the LPBF.

Abstract: The invention relates to a block bidding method and system for promoting clean energy consumption based on the power trading platform. The block bidding method includes the following steps: dividing the time slots for clean energy units to participate in power trading; predicting the typical monthly power generation curve of clean energy units; decomposing the signed annual power contract of clean energy units into months; determining the monthly trading declaration curve of clean energy units; determining the monthly trading declaration curve of clean energy units; determining the time-slot declaration price of clean energy units; realizing the trading clearing by the power trading platform in accordance with the principle of “high-low matching”.

Abstract: A button structure with three-dimensional stripes includes a button body, a plurality of stripes or pictures, and a mirror layer. The stripes or the pictures are formed on a bottom side of the button body, and the mirror layer is formed on the stripes for producing a mirrored visual effect. Whereby, the sharp contrast is produced between the mirror layer and the stripes, so that the button body produces a three-dimensional raised visual effect. Hence, the present invention solves the conventional button structure's problems of being time-consuming to form the words on the bottom surface of the button body using a mold, of the color layer not being easily sprayed onto the words, and of it being difficult for a user to change the words to have a different raised visual effect.