Abstract: A K-nearest neighbour rock burst prediction method and device based on big data visualization analysis are provided. The method includes the following steps: S1, obtaining spectrum characteristics and amplitude/energy characteristics of rocks according to rock data; and S2, accurately predicting rock burst by a K-nearest neighbour algorithm according to the spectrum characteristics and the amplitude/energy characteristics. By adopting the technical scheme, the rock burst can be accurately predicted to avoid huge economic and casualties.

Abstract: Provided are a communication system and a communication apparatus thereof, the communication apparatus includes: a bottom case and a printed circuit board mounted on the bottom case, the communication apparatus further includes a heat-conductive mounting strip, the printed circuit board being mounted on the bottom case by means of the heat-conductive mounting strip, wherein a lower end surface of the heat-conductive mounting strip is connected to the bottom case, and an upper end surface of the heat-conductive mounting strip is connected to the printed circuit board.

Abstract: A rotating mechanism used for rotating a screen includes a supporting stand and a base. An end of the supporting stand is connected to the screen. The supporting stand is for supporting the screen. The base is placed on a supporting surface, so as to support the supporting stand and the screen on the supporting surface. The other end of the supporting stand is fixed on the base. The base includes a first cover and a second cover. The other end of the supporting stand is connected with the first cover. The second cover is detachably installed on the first cover and contacts with the supporting surface. At least one of the first cover and the second cover is rotatable relative to the supporting surface.

Abstract: A rotating mechanism used for rotating a screen includes a supporting stand and a base. An end of the supporting stand is connected to the screen. The supporting stand is for supporting the screen. The base is placed on a supporting surface, so as to support the supporting stand and the screen on the supporting surface. The other end of the supporting stand is fixed on the base. The base includes a first cover and a second cover. The other end of the supporting stand is connected with the first cover. The second cover is detachably installed on the first cover and contacts with the supporting surface. At least one of the first cover and the second cover is rotatable relative to the supporting surface.

Abstract: A display device includes a casing, a device body, and a button module. The device body is disposed in the casing. The button module is disposed on the casing. The button module includes a button circuit board and a triggering member. The button circuit board is electrically connected to the device body. The triggering member is movably or rotatably disposed at a side of the button circuit board for moving or rotating to trigger the button circuit board so as to control the device body to execute a corresponding function.