Abstract: The present disclosure relates to MRI device communications. The communications comprise: acquiring a received signal from a transmitting end, the received signal comprising multiple data symbols and multiple training symbol sets, each training symbol set comprising a first preset number of training symbols, with two adjacent training symbol sets of the multiple training symbol sets being spaced apart by a second preset number of the data symbols; extracting the first preset number of symbols from the received signal at intervals of the second preset number of symbols, to obtain a third preset number of symbols as a candidate training sequence; determining whether the candidate training sequence comprises the multiple training symbol sets; and in response to a determination that the candidate training sequence comprises the multiple training symbol sets, determining at least one of synchronization information and channel estimation information of the received signal.

Abstract: An optical apparatus includes a main body, a reflecting object lens pivotally connected to the main body and a cover pivotally connected to the reflecting object lens. The reflecting object lens is rotatable with respect to the main body within a first angle, and the cover is rotatable with respect to the reflecting object lens within a second angle.

Abstract: An optical apparatus includes a main body, a reflecting object lens pivotally connected to the main body and a cover pivotally connected to the reflecting object lens. The reflecting object lens is rotatable with respect to the main body within a first angle, and the cover is rotatable with respect to the reflecting object lens within a second angle.

Abstract: An image capture device and a clamping mechanism are provided. The clamping mechanism includes a main body, a holder, and a clamping member. The main body has two opposite surfaces, a first pivot portion and a second pivot portion, wherein the first pivot portion and the second pivot portion are disposed on the surfaces. The holder includes a fixing element for fixing an electronic device, wherein the holder is disposed on the first pivot portion and rotatable with respect to the main body on a plane. The clamping member is disposed on the second pivot portion and rotatable with respect to the main body on the plane.