Abstract: Disclosed are a rotary mechanism and an electronic device. The rotary mechanism includes a base, a first swing arm, a first connecting plate, and a first multistable flexible mechanism. Both the first swing arm and the first connecting plate are hinged to one side of the base. The first multistable flexible mechanism is disposed on the first connecting plate, and the first multistable flexible mechanism cooperates with the first swing arm to switch between a first stable state and a second stable state. In the unfolded state of the rotary mechanism, the first multistable flexible mechanism is in the first stable state, so as to lock the first swing arm at a first locking position of the first swing arm with respect to the first connecting plate. In the folded state of the rotary mechanism, the first multistable flexible mechanism is in the second stable state, so as to lock the first swing arm at a second locking position of the first swing arm with respect to the first connecting plate.

Abstract: A foldable mechanism and a foldable terminal are provided. The foldable mechanism includes a base, a pressing plate assembly, and a flexible support plate, where the pressing plate assembly is mounted on the base, and the flexible support plate is mounted on the pressing plate assembly. The pressing plate assembly includes a first pressing plate swing arm, and a rotating portion of the first pressing plate swing arm is rotatably connected to the base, to implement a rotatable connection between the first pressing plate swing arm and the base. The flexible support plate is mounted on the first pressing plate swing arm and may bend under driving of the first pressing plate swing arm, and a bending direction of the flexible support plate is parallel to a rotation center of the first pressing plate swing arm relative to the base.

Abstract: A lamina emergent torsional (LET) joint that includes an integrated membrane to reduce, or eliminate, certain unwanted motions and/or displacements associated with the operation of the LET joint is disclosed. The membrane-integrated LET joint (i.e., M-LET) can be used as a hinge for a lamina emergent mechanism and/or as a surrogate fold for an origami application to ensure accurate and repeatable transitions from a planar (i.e., lamina) state to a non-planar (i.e., lamina-emergent) state, and vice versa.

Abstract: The invention discloses a differential compliant displacement reducer, and relates to three technical solutions with similar working principles. The three technical solutions have the following characteristics: firstly, the three technical solutions all relate to an outer frame and all belong to a differential compliant displacement reducer circumferentially formed by extending upward and downward along both ends of the driver, and the working principle is similar; secondly, the differential motion of the three technical solutions comes from the difference caused by deformation of the upper and lower or inclined upper and lower deformable parts of the driver in the differential compliant displacement reducer; thirdly, compared with a traditional displacement amplifier, the three technical solutions all belong to the displacement reducer, the structure is simpler than that of the existing displacement amplifier; and fourthly, the three technical solutions can be matched with a macro-motion platform.

Abstract: The invention discloses a modular differential compliant displacement reducer with output in same direction or reverse direction of input. The modular differential compliant displacement reducer includes a forward motion module, a reverse motion module and an actuator, and two ends of the forward motion module are respectively connected to one end of the reverse motion module. Differential superposition of displacement is achieved through combination of the forward motion module and the reverse motion module, a large displacement reduction ratio can be obtained, and therefore the resolution ratio and precision of motion are greatly improved. The reducer can be matched with a macro-motion platform, and large-range and ultrahigh-precision motion positioning is achieved.

Abstract: A lamina emergent torsional (LET) joint that includes an integrated membrane to reduce, or eliminate, certain unwanted motions and/or displacements associated with the operation of the LET joint is disclosed. The membrane-integrated LET joint (i.e., M-LET) can be used as a hinge for a lamina emergent mechanism and/or as a surrogate fold for an origami application to ensure accurate and repeatable transitions from a planar (i.e., lamina) state to a non-planar (i.e., lamina-emergent) state, and vice versa.

Abstract: A lamina emergent torsional (LET) joint that includes an integrated membrane to reduce, or eliminate, certain unwanted motions and/or displacements associated with the operation of the LET joint is disclosed. The membrane-integrated LET joint (i.e., M-LET) can be used as a hinge for a lamina emergent mechanism and/or as a surrogate fold for an origami application to ensure accurate and repeatable transitions from a planar (i.e., lamina) state to a non-planar (i.e., lamina-emergent) state, and vice versa.

Abstract: The invention discloses a modular differential compliant displacement reducer with output in same direction or reverse direction of input. The modular differential compliant displacement reducer includes a forward motion module, a reverse motion module and an actuator, and two ends of the forward motion module are respectively connected to one end of the reverse motion module. Differential superposition of displacement is achieved through combination of the forward motion module and the reverse motion module, a large displacement reduction ratio can be obtained, and therefore the resolution ratio and precision of motion are greatly improved. The reducer can be matched with a macro-motion platform, and large-range and ultrahigh-precision motion positioning is achieved.

Abstract: Aspects of the disclosure provide a method and a server system for transcoding a video source file into multiple target formats. The server system includes a first server configured to receive a first video chunk of the video source file and first attribute parameters corresponding to the first video chunk and a first target format of the multiple target formats where the first video chunk is transcoded into the first target format. The first attribute parameters include a first precoding parameter for the first video chunk and a first coding parameter for the first target format. The first server can process the first video chunk according to the first precoding parameter to obtain a first intermediate coding result and code the first intermediate coding result according to the first coding parameter to obtain a first final coding result in the first target format and output the first final coding result.

Abstract: The invention discloses a differential compliant displacement reducer, and relates to three technical solutions with similar working principles. The three technical solutions have the following characteristics: firstly, the three technical solutions all relate to an outer frame and all belong to a differential compliant displacement reducer circumferentially formed by extending upward and downward along both ends of the driver, and the working principle is similar; secondly, the differential motion of the three technical solutions comes from the difference caused by deformation of the upper and lower or inclined upper and lower deformable parts of the driver in the differential compliant displacement reducer; thirdly, compared with a traditional displacement amplifier, the three technical solutions all belong to the displacement reducer, the structure is simpler than that of the existing displacement amplifier; and fourthly, the three technical solutions can be matched with a macro-motion platform.

Abstract: A lamina emergent torsional (LET) joint that includes an integrated membrane to reduce, or eliminate, certain unwanted motions and/or displacements associated with the operation of the LET joint is disclosed. The membrane-integrated LET joint (i.e., M-LET) can be used as a hinge for a lamina emergent mechanism and/or as a surrogate fold for an origami application to ensure accurate and repeatable transitions from a planar (i.e., lamina) state to a non-planar (i.e., lamina-emergent) state, and vice versa.

Abstract: Aspects of the disclosure provide a method and a server system for transcoding a video source file into multiple target formats. The server system includes a first server configured to receive a first video chunk of the video source file and first attribute parameters corresponding to the first video chunk and a first target format of the multiple target formats where the first video chunk is transcoded into the first target format. The first attribute parameters include a first precoding parameter for the first video chunk and a first coding parameter for the first target format. The first server can process the first video chunk according to the first precoding parameter to obtain a first intermediate coding result and code the first intermediate coding result according to the first coding parameter to obtain a first final coding result in the first target format and output the first final coding result.