Abstract: High density polyethylene polymers, including high molecular weight and ultrahigh molecular weight polyethylene polymers, are disclosed that are at least partially made from bio-based feedstocks. The bio-based feedstocks are selected so as to produce high purity monomers capable of producing high density polymers for use in high purity applications, such as in producing implants and porous membranes for lithium-ion batteries.

Abstract: The present application discloses a spin Hall device, a method for obtaining a Hall voltage, and a max pooling method. The spin Hall device includes a cobalt ferroboron layer. A top view and a bottom view of the spin Hall device are completely the same as a cross-shaped graph that has two axes of symmetry perpendicular to each other and equally divided by each other. The spin Hall device of the present application has non-volatility and analog polymorphic characteristics, can be used for obtaining a Hall voltage and applied to various circuits, is simple in structure and small in size, can save on-chip resources, and can meet computation requirements.

Abstract: As described herein, a N-Gram index may be created and the search may be conducted using the index, which will lead to faster search results. The N-Gram index may also include partial N-Gram components to capture more relevant data. Moreover, as described herein, the search may also take into account recent log data that has not yet been indexed. Techniques for building an index store using log data and efficiently searching the index store and log data to process search requests are described herein.

Abstract: Methods and systems for federated learning using a parameterized optimization algorithm are described. A central server receives, from each of a plurality of user devices, a proximal map and feedback representing a current state of each user device. The server computes an update to optimization parameters of a parameterized optimization algorithm, using the received feedback. Model updates are computed for each user device, using the received proximal maps and the parameterized optimization algorithm having the updated optimization parameters. Each model update is transmitted to each respective client for updating the respective model.

Abstract: The present disclosure discloses an electro-hydraulic varifocal lens-based method for tracking a 3D trajectory of a moving object. The method includes the following steps of: (1) obtaining a functional relation between a focusing control current and camera's intrinsic parameters; (2) obtaining a functional relation between focusing control currents of the electro-hydraulic varifocal lens and an optimal object distance; (3) initializing an object tracking algorithm, and taking an object tracking box as a subsequent focusing window; (4) carrying out first autofocusing, recording a focusing control current value after the autofocusing is completed, as well as a size and center point coordinates of the object tracking box; (5) calculating and recording coordinates of the object in 3D space; and (6) repeating steps (4) and (5) for the same object, and sequentially connecting the recorded coordinates of the object in 3D space into a trajectory.

Abstract: A method includes: determining first indication information, where the first indication information indicates a resource location of a second synchronization signal block, and the second synchronization signal block is associated with control information; and sending a first synchronization signal block, where a physical broadcast channel in the first synchronization signal block carries the first indication information.

Abstract: Systems and methods for computer-assisted design of an inductor are described. Target specifications for an inductor are received. An inductor design is generated segment-by-segment using a reinforcement learning agent to generate segment parameters for each added segment. The reinforcement learning agent implements a policy that is learned using a reward computed based on performance of the generated inductor design relative to the target specifications. The generated inductor design is outputted as a candidate inductor design after determining that the generated inductor design satisfies a predefined performance threshold.

Abstract: A beam training method and a related device are disclosed. The method includes: sending, by a first communications device, sidelink control information (SCI) to a second communications device, where the SCI is used to instruct the first communications device to send at least one channel state information-reference signal (CSI-RS) to the second communications device; and sending, by the first communications device, the at least one CSI-RS to the second communications device based on the SCI, where the at least one CSI-RS is used by the second communications device to determine that a beam corresponding to a CSI-RS with highest signal strength in the at least one CSI-RS is a beam for communication between the second communications device and the first communications device. The CSI-RS used for beam training is dynamically sent based on the instruction of the SCI.

Abstract: Methods and systems are described for support policy learning in an agent of a robot. A general value function (GVF) is learned for a main policy, where the GVF represents future performance of the agent executing the main policy for a given state of the environment. A master policy selects an action based on the predicted accumulated success value received from the general value function. When the predicted accumulated success value is an acceptable value, the action selected by the master policy is execution of the main policy. When the predicted accumulated success value is not an acceptable value, the master action causes a support policy to be learned. The support policy generates a support action to be performed which causes the robot to transition from to a new state where the predicted accumulated success value has an acceptable value.

Abstract: A negative stiffness generating mechanism and a quasi-zero stiffness vibration isolator are provided. A housing is mounted on a base, and the axial relative positions of the housing and the base can be adjusted; a negative stiffness unit comprises inner-ring magnets, outer-ring magnets and a supporting shaft, the supporting shaft axially slides on the base and passes through the housing, the inner-ring magnets fixedly sleeve the supporting shaft, and the outer-ring magnets sleeve outside the inner-ring magnets and are divided into upper and lower groups of outer-ring magnets; the upper and lower groups of outer-ring magnets can synchronously move through a negative stiffness adjusting device; and the axial relative positions of the middle planes of the outer-ring and inner-ring magnets can be adjusted by adjusting the axial relative positions of the housing and the base. The isolator comprises a negative stiffness generating mechanism and a positive stiffness unit.

Abstract: The method includes generating, by an access point (AP), signaling that includes an AP identifier (ID) field, a bandwidth (BW) field, a guard interval (GI) field, a cyclic redundancy check (CRC) field, and a tail field, the AP ID field is used to indicate an ID of the AP, the BW field is used to indicate bandwidth required for data transmission subsequent to the signaling, the GI is used to indicate a length of a cyclic prefix (CP) required for data transmission subsequent to the signaling, the CRC field is used to guard a field before the CRC field in the signaling, and the Tail field is used to empty an encoder and a decoder, where the CRC field and the Tail field are the last two fields of the signaling. The method also includes sending, by the AP, the signaling.

Abstract: The present invention discloses an afterload device for ex situ heart perfusion, which includes an afterload energy storage module, a pressure regulation module and two flow rate regulators that are connected through a conduit. The afterload energy storage module includes a rigid closed container and a flexible container. The perfusion fluid flows into the flexible container from one side thereof through the conduit, and the perfusion fluid flows out from the flexible container at another side thereof as the flexible container is subjected to the action of the medium pressure in the rigid hermetic container. The pressure regulation module includes two pressure regulation valves and a compressible-medium source, for regulating the pressure range within the rigid hermetic container to be always maintained between the set diastolic pressure and the set systolic pressure.

Abstract: A triboelectric nanogeneration module, and a combined wind turbine and a method thereof. The triboelectric nanogeneration module includes a rotating disc, and moving friction plates and fixed friction plates that are oppositely arranged outside the radial direction of the rotating disc. A nano-friction material layer is arranged on the surface of each of the moving friction plates and the fixed friction plates. Driving devices are arranged on the rotating disc in the circumferential direction at intervals. The driving devices are used for extruding the moving friction plates to move to the positions at which the moving friction plates are in contact with the fixed friction plates. The moving friction plates are connected to reset devices used for separating the moving friction plates from the fixed friction plates. The moving friction plates perform straight reciprocating movement under the action of the driving devices and the reset devices.

Abstract: A squeeze mode giant electrorheological fluid damper is disclosed. The squeeze mode giant electrorheological fluid damper comprises a support, a container and a connecting structure, wherein the support comprises a bottom plate, guide shafts and a top plate, the guide shaft is vertically fixed on the bottom plate, and the top plate is slidably arranged on the guide shaft; the container comprises a container body and two spiral spring pieces coaxially arranged in the container body, the container body is fixed on the bottom plate, the bottoms of the two spiral spring pieces are fixed to the bottom of the container, the two spiral spring pieces are not in contact with each other and are spaced by 180°; the top of the connecting structure is fixedly connected with the top plate, and the bottom of the connecting structure is fixedly connected with the tops of the two spiral spring pieces.

Abstract: The present disclosure discloses an electro-hydraulic varifocal lens-based method for tracking a three-dimensional (3D) trajectory of an object by using a mobile robot. By modeling an optical imaging system, a functional relation between a focusing control current of an electro-hydraulic varifocal lens and an optimal imaging object distance is obtained. Based on this functional relation, depth information of the object in focus with respect to a mobile robot camera and an average velocity of the objective within a time interval with respect to a previous moment can be obtained. With this information, 3D coordinates and motion trajectory of the object in a camera coordinate system can be calculated. At the same time, the mobile robot locates positions and attitudes in a world coordinate system in real time, and transforms the 3D coordinates of the tracked object from the camera coordinate system to the world coordinate system.

Abstract: A method includes: determining first indication information, where the first indication information indicates a resource location of a second synchronization signal block, and the second synchronization signal block is associated with control information; and sending a first synchronization signal block, where a physical broadcast channel in the first synchronization signal block carries the first indication information.

Abstract: The present disclosure relates to transmission methods and apparatuses in Wireless Local Area Networks (WLANs). One example method for indicating transmission opportunity (TXOP) duration in a wireless communication system, comprising generating, by a TXOP holder, a physical layer protocol data unit (PPDU), where the High Efficiency Signal field A (HE-SIGA) in the PPDU carries a TXOP duration field, the TXOP duration field is used to indicate the remaining time for using the channel by the station to other stations, the TXOP duration field includes a first part which is used to indicate the granularity used, and a second part which is used to indicate the TXOP duration using the granularity indicated by the first part, and sending the generated PPDU.

Abstract: A magnetic suspension type sensing system for space full-degree-of-freedom absolute poses is provided. The system includes a reference platform, multiple quasi-zero stiffness supporting legs and a platform to be tested. The reference platform and the platform to be tested are connected in a spherical hinge mode through the multiple quasi-zero stiffness supporting legs. Each of the multiple quasi-zero stiffness supporting legs includes a lower end spherical hinge, a lower end cover, a positive stiffness unit, a negative stiffness unit, a shaft, a lower end shell, an upper end shell and an upper end spherical hinge.

Abstract: Disclosed is a quasi-zero stiffness absolute displacement sensor based on electromagnetic positive stiffness, and relates to the technical field of vibration measurement. The quasi-zero stiffness absolute displacement sensor comprises an eddy current displacement sensor unit, a negative stiffness unit, an intermediate connector, a positive stiffness unit, a bottom shell and a motion axis. The damping of the mechanism can be effectively reduced, the service life of the system is prolonged, and the mechanism size is reduced. By adjusting the number of layers of permanent magnets and coils in the electromagnetic positive stiffness unit and the electromagnetic negative stiffness unit and controlling the magnitude of current in the coils, electromagnetic force between the permanent magnets and the electromagnetic coils can be changed, the magnitude of positive stiffness and the magnitude of negative stiffness are adjusted, and control over the stiffness of the whole system is achieved.

Abstract: Method and system for controlling the behavior of an object. Behavior of the object is controlled during a first time period by using a first agent that applies a first behavior policy to map observations about the object and the environment in the first time period to a corresponding control action. Control is transitioned from the first agent to a second agent during a transition period following the first time period. Behavior of the object during a second time period following the transition period is controlled by using a second agent that applies a second behavior policy to map observations about the object and the environment in the second time period to a corresponding control action that is applied to the object. During transition the first agent applies the first behavior policy control the object and the second agent applies the second behavior policy to map observations about the object and the environment to corresponding control actions that are not applied to the object.