Abstract: The present application provides an audio and video playing system, a playing method and a playing device. The system comprises: a display device; a directional sound output module configured to output a directional sound signal; a tracking element configured to monitor a target visual area and to monitor the target display area on the display screen; and a processor, connected with the directional sound output module and the tracking element respectively, and configured to acquire a first audio and video data to be output in the target display area, display image information of the first audio and video data in the target display area, and output sound information of the first audio and video data to the directional sound output module such that the directional sound output module output a directional sound signal towards the target visual area.

Abstract: The present disclosure provides an image compression method, including steps of: acquiring a human-eye fixation point on an original image, and determining a fixation region and a non-fixation region of the original image according to the human-eye fixation point; and compressing the non-fixation region, and generating a compressed image according to the fixation region and the compressed non-fixation region. The present disclosure also provides an image display method, an image compression apparatus, an image display apparatus, and a computer readable medium.

Abstract: The present disclosure discloses a novel assembled nuclear magnetic resonance (NMR) sample tube and an assembly method thereof. The structure includes a common NMR sample tube, a first open-top screw cap and a second open-top screw cap. The first screw cap is sleeved on the common NMR sample tube, and an open end of the first screw cap is tightly connected to an outer wall of the common NMR sample tube. The second screw cap is in threaded connection with the screw thread on the top of the short tube. A short tube is sleeved on the common NMR sample tube, and the screw thread at the bottom of the short tube is in threaded connection with the first screw cap. A silicone rubber septum is located between the open end of the second screw cap and the screw thread on the top of the short tube.

Abstract: The present disclosure discloses a novel assembled nuclear magnetic resonance (NMR) sample tube and an assembly method thereof. The structure includes a common NMR sample tube, a first open-top screw cap and a second open-top screw cap. The first screw cap is sleeved on the common NMR sample tube, and an open end of the first screw cap is tightly connected to an outer wall of the common NMR sample tube. The second screw cap is in threaded connection with the screw thread on the top of the short tube. A short tube is sleeved on the common NMR sample tube, and the screw thread at the bottom of the short tube is in threaded connection with the first screw cap. A silicone rubber septum is located between the open end of the second screw cap and the screw thread on the top of the short tube.

Abstract: The present invention relates to the field of semiconductor manufacturing technology, more particularly to a swing spray device of a cleaning apparatus and a cleaning method. The swing spray device comprises a spray arm, a spray head and a driving unit. The spray head is connected with the spray arm, and is controlled to swim by the driving unit. The spray head is hinged with the spray arm to form a first hinge joint. The driving unit is an air cylinder; the piston rod of the air cylinder is connected with the spray head. The piston rod is hinged with the spray head to form a second hinge joint. Therefore, the better cleaning effects can be achieved both in the center and the edge of the wafer.

Abstract: The present invention relates to the field of semiconductor manufacturing technology, more particularly to a swing spray device of a cleaning apparatus and a cleaning method. The swing spray device comprises a spray arm, a spray head and a driving unit. The spray head is connected with the spray arm, and is controlled to swim by the driving unit. The spray head is hinged with the spray arm to form a first hinge joint. The driving unit is an air cylinder; the piston rod of the air cylinder is connected with the spray head. The piston rod is hinged with the spray head to form a second hinge joint. Therefore, the better cleaning effects can be achieved both in the center and the edge of the wafer.