Abstract: A double-sided sound device includes a frame, a first vibration system, a second vibration system, and a magnetic circuit system. The frame includes an upper end opening and a lower end opening, the first vibration system is disposed at the upper end opening of the frame, the second vibration system is disposed at the lower end opening of the frame, and the magnetic circuit system is disposed in the frame. The magnetic circuit system includes an outer magnetic yoke, a magnet portion, and a non-magnetically conductive connector. The outer magnetic yoke includes a side wall and a first flange portion. The magnet portion includes an upper pole core, a lower pole core, and a magnetic steel, and the magnetic steel is clamped between the upper pole core and the lower pole core. The double-sided sound device reduces a product size, and further reduces material costs.

Abstract: A negative chemically amplified photoresist of a fused ring aromatic hydrocarbon derivative, a preparation method therefor, and use thereof are provided. A matrix component in the photoresist is a fused ring aromatic hydrocarbon derivative represented by general formula (I) that can be dissolved in organic solvents commonly used in photoresists. The photoresist composition of the present disclosure can be prepared to give a uniform film, and a molecular glass serving as the matrix component is not precipitated in the film preparation process.

Abstract: The present application discloses a method for controlling a photographing function, which is applied to an AR apparatus, the method comprising: if a photographing function calling instruction is received, activating a photographing device of the AR apparatus; setting a display status of the AR apparatus to a non-preview status, wherein, a currently displayed content of the AR apparatus does not include a photographing preview content in the non-preview status; determining whether a photographing instruction is received; if so, controlling the photographing device to perform an operation corresponding to the photographing instruction. According to the present application, the power consumption of the photographing function of the AR apparatus can be reduced, and the endurance can be improved. The present application also discloses a device for controlling a photographing function, a storage medium and an AR apparatus which have the above beneficial effects.

Abstract: A bi-directional penetrating metal bottleneck structure of a type IV hydrogen storage tank is provided, which includes a metal valve seat, a plastic liner, and a fiber winding layer. A valve seat hole is formed on an inner side of the metal valve seat, and the metal valve seat includes an annular flange, a valve seat column section, and a valve seat extension. L-shaped through holes and radial penetrating holes are formed in the valve seat column section. The valve seat hole is an irregular through hole and is provided with an annular groove. The valve seat extension is provided with a winding inclined plane, a self-tightening conical surface, a circumferential groove, and axial penetrating holes. The plastic liner includes an inner plastic joint, an outer plastic joint, a tapered connecting section, L-shaped connectors, radial connectors, axial connectors, and a reinforcement section.

Abstract: A wafer holder includes a carrier plate, and blocking devices. The carrier plate includes a base and a guiding structure. The base has a carrier surface. The guiding structure surrounds the base. The blocking devices are coupled to the carrier plate through the guiding structure, and the blocking devices are configured to move along the guiding structure. Each of the blocking devices has a curved wall, and the curved walls at least partially surrounds an area above the carrier surface.

Abstract: An energy harvesting system for use with the human body may use an eccentrically mounted weight winding a mainspring that drives a mechanical clock mechanism. The mechanical clock mechanism in turn may produce pulses of electricity, for example, through periodic flexing of a piezoelectric or triboelectric material during the regular motion of the mechanical timing mechanism. By remaining in a mechanical rather than electrical domain, improved simplicity and efficiency may be obtained in the generation of regularly spaced uniform pulses.

Abstract: A method for constructing episodic memory model based on rat brain visual pathway and entorhinal-hippocampal structure mainly applied to environment cognition and navigation of an intelligent mobile robot to complete tasks of environment cognition map construction and target-oriented navigation is provided. The image information of the environment, the head-direction angle and speed of the robot are collected, and then the head-direction angle and speed of the robot are input into the entorhinal-hippocampal CA3 neural computational model to obtain the robot's precise position. The visual information is input into the computational model of the visual pathway to obtain the scene information in the current vision of the robot. The above two kinds of information are fused and stored in a cognitive node with the topological relationship.

Abstract: A network optimization method includes sending, by a first access network device, first information to a terminal device, and receiving, by the first access network device, second information from the terminal device. The first information includes application layer measurement configuration information, network slice scope information or a service type. The network slice scope information includes at least one network slice identifier. The second information includes a first application layer measurement result corresponding to the first information and identification information corresponding to the first application layer measurement result. The identification information includes an identifier of a protocol data unit (PDU) session.

Abstract: A push notification distribution system centralizes the management and delivery of push notifications to applications executing on electronic devices. Registration requests to register applications for push notifications may be aggregated and sent as an aggregated registration request. The delivery priority of push notifications may be managed according to specified preferences. Upon receiving a push notification intended for an electronic device, a delivery priority of the push notification may be changed if an application identifier associated with the push notification is found on a list of application identifiers with designed delivery priorities.

Abstract: An electric drive power transmission system box assembly is provided having stepped pin positioning and a mounting method of the electric drive power transmission system box assembly. The box assembly includes a housing shaft string assembly, stepped pins, a first housing, and a first bearing. The housing shaft string assembly includes a housing and a shaft string supported on the housing. Each stepped pin includes a matching section and a guide section, the diameter of the matching section is greater than the diameter of the guide section, a tail end portion of the matching section is fixed in a fixing pin hole of the housing, the first housing is mounted and fixed to the housing shaft string assembly under the guide of the guide section, and a rear end of the shaft string is supported on the first housing by means of the first bearing.

Abstract: Disclosed are systems and methods for manufacturing energy relays for energy directing systems. Methods and devices are disclosed for forming random and non-random patterns of energy relay materials with energy localization properties. Methods and devices are disclosed for forming energy relays of different shapes.

Abstract: A power decentralized electric locomotive apparatus includes an electric locomotive and a plurality of muck trucks. The electric locomotive and the plurality of muck trucks are connected in sequence, and a mater drive motor is fixedly mounted on the electric locomotive. A slave drive motor is fixedly mounted on at least one of the muck trucks; a torque of the slave drive motor is smaller than a torque of the mater drive motor; and the slave drive motor cooperates with the mater drive motor, to enable the muck truck to travel on rails and reduce drive power and self-weight of the electric locomotive.

Abstract: A device for preparing ultra-high purity zinc based on intelligently-controlled zone melting, including a slide platform connected with a screw through a servo control system to control movement of a heating-cooling device. A quartz tube is provided inside an induction heater to protect a melting zone. An infrared thermometer is connected to the heater, and configured to monitor temperature within the melting zone, and control power of the heater. A ring magnetic stirrer with non-contact circumferential rotation cooperates with coil to stir zinc melt. A water-cooling copper jacket is connected to two ends of the heater to cool a zinc bar, and its water inlet and outlet are connected with a water chiller. The infrared thermometer monitors temperature of the zinc bar and controls water flow of the cooling system. A lifting device is connected with a base cabinet to change inclined angle of the zinc bar.

Abstract: The disclosure provides data transmission methods and apparatuses. One example method includes when the terminal device needs to perform the cross-network movement, the terminal device sends a message to a network element of a network accessed by the terminal device, to notify that the terminal device is to perform the cross-network movement from a source network to a target network. Therefore, during the movement of the terminal device, a network side pauses transmission of user plane data of the terminal device, and buffers data that is not sent before the terminal device performs the cross-network movement. After accessing the target network, the network side sends the buffered data to the terminal device.

Abstract: A surface grid panel assembly includes a grid panel and a plurality of attachment studs formed thereon. The grid panel includes a plurality of first and second grid members intersecting with each other. The attachment studs are spacedly protruded from top surfaces of the first and second grid members of the grid panel, wherein one or more attachment elements are adapted for detachably coupling with the attachment studs to couple the attachment elements on the grid panel.

Abstract: Provided is a pressure-resistant underwater acoustic coating structure with a mesh structure interlayer, including an outer coating, a mesh structure interlayer, an inner coating, and a metal backing; wherein the outer coating is used for inputting acoustic waves, the mesh structure interlayer and the inner coating are used for consuming acoustic wave energy, and the metal backing is used for enriching a sound absorption mode; and the outer coating, the mesh structure interlayer, the inner coating and the metal backing are attached in sequence.

Abstract: A process for treating aged oil by electron beam irradiation is disclosed, comprising the following steps: step 1, homogenizing the aged oil and then feeding the aged oil into a distributor; step 2, forming a liquid layer having a certain thickness on the distributor; step 3, installing and debugging an electron beam irradiation device on the distributor; step 4, installing and debugging a phased-array microwave emitter on the distributor after installing and debugging the electron beam irradiation device; step 5, turning on the electron beam irradiation device and the phased-array microwave emitter; and step 6, dividing the treated aged oil and then allowing the aged oil after dividing to enter an oil pool and a water pool for standing. Oil flows out from an upper layer of the oil pool, a lower layer of the oil pool flows back to an aged oil storage pool.

Abstract: This application sets forth techniques for managing phone number-based user accounts. According to some embodiments, a server computing device can be configured to carry out the steps of (1) receiving, from a first client computing device, a request to create a user account based on a phone number, (2) in response to authenticating that the first client computing device is associated with the phone number: creating the user account based on the phone number, creating a hidden contact address based on the phone number, and assigning the hidden contact address to the user account, and (3) in response to receiving a notification that a second client computing device is associated with the phone number: requiring the user account to be updated to be based on a different phone number, or assigning, to the user account, a visible contact address based on the phone number.