Abstract: The disclosure provides a method and system for encoding bit rate control and version selection for a dynamic adaptive video streaming media. The method adopts a dynamic adaptive streaming media encoding technology to encode each original video into a plurality of versions with different bit rates at a server and determines video version subsets to be encoded by the original videos and specific encoding parameters of each video version by taking an encoding complexity-bit rate-distortion model for different original video contents, constraints on an encoding bit rate and a computing resource of the video server, network connection conditions of different users and a video-on-demand probability distribution into consideration, and finally, the video server outputs an optimal video version set through encoding, so as to maximize the overall quality of videos watched by users.

Abstract: The present application discloses a microtome. The microtome includes: a blade cutting a soft material in a first direction, the first direction being a feeding direction of the soft material; a blade holder holding the blade; an actuator providing a vibration in a second direction along a cutting edge of the blade; and a frequency-tunable resonator driven by the actuator into vibration and fixedly connected to the blade holder to transfer the vibration to the blade holder and the blade, the resonator having a tunable resonant frequency in the second direction.

Abstract: The disclosure provides a method and system for encoding bit rate control and version selection for a dynamic adaptive video streaming media. The method adopts a dynamic adaptive streaming media encoding technology to encode each original video into a plurality of versions with different bit rates at a server and determines video version subsets to be encoded by the original videos and specific encoding parameters of each video version by taking an encoding complexity-bit rate-distortion model for different original video contents, constraints on an encoding bit rate and a computing resource of the video server, network connection conditions of different users and a video-on-demand probability distribution into consideration, and finally, the video server outputs an optimal video version set through encoding, so as to maximize the overall quality of videos watched by users.

Abstract: The present application discloses a microtome. The microtome includes: a blade cutting a soft material in a first direction, the first direction being a feeding direction of the soft material; a blade holder holding the blade; an actuator providing a vibration in a second direction along a cutting edge of the blade; and a frequency-tunable resonator driven by the actuator into vibration and fixedly connected to the blade holder to transfer the vibration to the blade holder and the blade, the resonator having a tunable resonant frequency in the second direction.

Abstract: This patent invents a heat-resistant isotropic bonded NdFeB magnet and its preparation technology, belonging to the field of magnetic materials. In present invention, isotropic NdFeB magnetic powders is used as magnetic material, sodium silicate is used as principal binder, and epoxy resin is used as auxiliary binder to prepare heat-resistant isotropic bonded NdFeB magnets. The prepared magnets have greatly increased heat resistance to stand an operating temperature of 200° C., and have advantages of penetration and corrosion resistance. The invented heat-resistant isotropic bonded NdFeB magnets feature good magnetic properties and high operating temperature. During the preparation process, it has the advantage of simple equipment, easy operation, low cost. The technology is easy to large scale production, and has high economic value and huge application prospect in the field of permanent magnetic materials.

Abstract: This patent invents a heat-resistant isotropic bonded NdFeB magnet and its preparation technology, belonging to the field of magnetic materials. In present invention, isotropic NdFeB magnetic powders is used as magnetic material, sodium silicate is used as principal binder, and epoxy resin is used as auxiliary binder to prepare heat-resistant isotropic bonded NdFeB magnets. The prepared magnets have greatly increased heat resistance to stand an operating temperature of 200° C., and have advantages of penetration and corrosion resistance. The invented heat-resistant isotropic bonded NdFeB magnets feature good magnetic properties and high operating temperature. During the preparation process, it has the advantage of simple equipment, easy operation, low cost. The technology is easy to large scale production, and has high economic value and huge application prospect in the field of permanent magnetic materials.

Abstract: A compliant apparatus for nano-manufacture, including a stage for supporting the objects to be nano-manufactured. The stage includes at least one flexural beam and at least one actuator coupled to the flexural beam; and the actuator is configured to generate and apply axial loads onto the flexural beam, such that a natural frequency of the flexural beam is shifted in response to the generated axial loads, so as to allow trade-offs between the natural frequency and a stroke of the stage for nano-manufacturing the objects.

Abstract: A compliant apparatus for nano-manufacture, including a stage for supporting the objects to be nano-manufactured. The stage includes at least one flexural beam and at least one actuator coupled to the flexural beam; and the actuator is configured to generate and apply axial loads onto the flexural beam, such that a natural frequency of the flexural beam is shifted in response to the generated axial loads, so as to allow trade-offs between the natural frequency and a stroke of the stage for nano-manufacturing the objects.