Abstract: The disclosure discloses a door opening and closing device and an electrical apparatus, and belongs to the field of electrical apparatus. The door opening and closing device includes: a door ejection mechanism and a door rotation mechanism which are driven by a same drive mechanism. The drive mechanism includes: a driver, a first transmission assembly, a second transmission assembly connected to the driver and simultaneously separably connected to the first transmission assembly, and a clutch-ejection-push assembly, including an ejection-push sleeve which is sleeved on the second transmission assembly and a push rod for pushing the ejection-push sleeve, and the ejection-push sleeve is ejected and pushed by the push rod to push the second transmission assembly to separate from or connect to the first transmission assembly; and a linkage gear connected to the first transmission assembly and simultaneously connected to the door ejection mechanism and the door rotation mechanism.

Abstract: The disclosure discloses a door opening and closing device and an electrical apparatus, and belongs to a field of electrical apparatus. The door opening and closing device includes a door ejection mechanism and a door rotation mechanism driven by a same drive mechanism; the door rotation mechanism includes a drive member and a door rotation member; a first end of the door rotation member is rotatably disposed on a door body; a second end of the door rotation member is rotatably connected to a first end of the drive member; a second end of the drive member is rotatably disposed on a base; the drive mechanism includes a linkage gear; the linkage gear can drive the drive member to rotate to drive the door rotation member to rotate the door body, and drive the door ejection mechanism to eject and push the door body.

Abstract: The present disclosure provides a double-stranded RNAi agent for targeting and regulating HBV gene expression and a use thereof. The double-stranded RNAi agent comprises an antisense strand and a sense strand complementary to the antisense strand forming a duplex region. The nucleotide sequence of the antisense strand is as shown in SEQ ID NO: 8, 11, or 13, or the nucleotide sequence of the antisense strand is a modified sequence of the sequence shown in SEQ ID NO: 8, 11, or 13. Results from cell and animal experiments demonstrate that the double-stranded RNAi agent provided in the present disclosure can significantly reduce the expression of one or more HBV genes, block the viral life cycle, and can be used to develop drugs for treating diseases related to HBV gene expression.

Abstract: Matched points are identified using at least a first camera and a second camera as a person moves within a physical space during a calibration of the physical space. The matched points may be identified between each pair of cameras. A physical space calibration matrix that is solved based on the matched points is used during a video conference to determine whether a first bounding box of a first person captured by the first camera and a second bounding box of a second person captured by the second camera identify a single conference participant within the physical space.

Abstract: A transparent antenna, wherein the transparent antenna includes: a supporting plate and a radiation element provided on one side of the supporting plate, wherein the radiation element includes a substrate and a first radiator provided on one side of the substrate, the first radiator has a grid-line-like structure, and the shape of the outer contour of the first radiator is a rectangle having at least one cut corner; and a connecting component, wherein the connecting component is electrically connected to the radiation element.

Abstract: The disclosure relates to medical devices and methods of assembling medical devices, such as MRI-compatible interventional wireguides. An example of a wireguide includes a series of individual segments, a plurality of connectors, and a plurality of spacers. Each segment in the series of individual segments has a first end and a second end. Each connector of the plurality of connectors joins adjacent segments in the series of individual segments to one another such that a first end of a first segment and a second end of a second segment in the series of individual segments are attached to a connector of the plurality of connectors. A spacer of the plurality of spacers is disposed between each pair of adjacent segments in the series of individual segments. Each of the segments in the series of individual segments is electrically insulated from an adjacent segment in the series of individual segments.

Abstract: The present disclosure relates to the field of biomedicine, and specifically provides a 5?-phosphate modified nucleoside, and a preparation method and use thereof. The present disclosure provides a modified nucleoside compound, wherein the modified nucleoside compound is a compound represented by formula (I), a pharmaceutically acceptable salt thereof, or a stereoisomer thereof. The oligonucleotide comprising the modified nucleoside compound provided by the present disclosure exhibits significantly enhanced drug efficacy.

Abstract: A high-low temperature and high-frequency angular vibration device includes an angular vibration table assembly, a temperature-controllable chamber and a control system. The angular vibration table assembly includes a base, a hydrostatic bearing, a torque motor, an adapter assembly, an encoder, a conductive slip ring, a thermal-insulating shaft and a worktable. The hydrostatic bearing includes a bearing seat, an upper bearing sleeve, a hydrostatic shaft and a lower bearing sleeve. The torque motor includes a stator and a rotor, and is internally provided with a motor shaft. The adapter assembly includes an adapter flange and a transmission key. The thermal-insulating shaft includes an upper shaft section, a middle shaft section and a lower section. The control system is configured to control a temperature of the temperature-controllable chamber, and an angular frequency, an angular rate and an angular position of the angular vibration table assembly.

Abstract: The disclosure relates to a field of electrical technology, and particularly discloses an electrical apparatus, a door opening and closing device and a control method of a clutch thereof. The door opening and closing device includes: a drive mechanism, a door ejection mechanism, a door rotation mechanism and an angle acquisition unit. a drive mechanism including a driver, a first transmission assembly, a second transmission assembly connected to the driver and simultaneously separably connected to the first transmission assembly, and a clutch-ejection-push assembly pushing the second transmission assembly to separate from or connect to the first transmission assembly; and a linkage gear connected to the first transmission assembly and simultaneously connected to the door ejection mechanism 00) and the door rotation mechanism. The angle acquisition unit is configured to acquire a rotation angle of the linkage gear.