Abstract: An ultra-wideband electromagnetic band gap (EBG) structure includes multiple EBG units in an array. Each EBG unit includes a power plane, a dielectric substrate and a ground plane from top to bottom. The power plane includes a patch, a coupled complementary split ring resonator (C-CSRR) and a plurality of semi-improved Z-bridge structures. Each edge of the patch is provided with a semi-improved Z-bridge structure. The C-CSRR is provided within a ring formed by the semi-improved Z-bridge structures. The Z-bridge structure includes a first horizontal branch, a first vertical branch, a second horizontal branch and a second vertical branch connected in sequence. The second vertical branch is connected to the patch. First horizontal branches of adjacent EBG units are connected to each other. A circuit board including the aforementioned EBG structure is also provided.

Abstract: Disclosed are a pulverized coal preprocessing method and a pulverized coal gasifying method. The pulverized coal preprocessing method comprises the following steps: (1) performing pore broadening on pulverized coal to obtain preprocessed pulverized coal; (2) loading alkali metal ions into the preprocessed pulverized coal under an ion exchange condition to obtain alkali metal loaded pulverized coal. The method further comprises loading a chrome complex into the alkali metal loaded pulverized coal obtained in described step (2). In gasification, the pulverized coal loaded with alkali metal potassium and chrome catalysts obtained by the method has the advantages of high sulphur removal rate, high carbon conversion rate, short gasifying reaction time and high methane production.

Abstract: Disclosed are a pulverized coal preprocessing method and a pulverized coal gasifying method. The pulverized coal preprocessing method comprises the following steps: (1) performing pore broadening on pulverized coal to obtain preprocessed pulverized coal; (2) loading alkali metal ions into the preprocessed pulverized coal under an ion exchange condition to obtain alkali metal loaded pulverized coal. The method further comprises loading a chrome complex into the alkali metal loaded pulverized coal obtained in described step (2). In gasification, the pulverized coal loaded with alkali metal potassium and chrome catalysts obtained by the method has the advantages of high sulphur removal rate, high carbon conversion rate, short gasifying reaction time and high methane production.

Abstract: A power distribution connection apparatus comprises a busbar that includes a first frame body and a second frame body, where one end of the first frame body is connected to one end of the second frame body; a fastener that includes a fastening part and a first connecting part, where the fastening part is fitted outside the first frame body or the second frame body, and slides along the first frame body or the second frame body, there is a tooth needle mounting hole on the first connecting part, and the first connecting part and the fastening part are connected on one side of the first frame body or the second frame body; and a tooth needle, where one end of the tooth needle is plugged inside the tooth needle mounting hole, and the plugging depth is adjustable.

Abstract: A power distribution connection apparatus comprises a busbar that includes a first frame body and a second frame body, where one end of the first frame body is connected to one end of the second frame body; a fastener that includes a fastening part and a first connecting part, where the fastening part is fitted outside the first frame body or the second frame body, and slides along the first frame body or the second frame body, there is a tooth needle mounting hole on the first connecting part, and the first connecting part and the fastening part are connected on one side of the first frame body or the second frame body; and a tooth needle, where one end of the tooth needle is plugged inside the tooth needle mounting hole, and the plugging depth is adjustable.