Abstract: Use of gallium nitride (GaN) semiconductor material for power devices is challenging due to low yield caused by high defect density on the wafer. Device layout on the wafer, chip probing, and device packaging increase the yield of large area power devices. Device dies containing a plurality of lower-power sub-devices are used to achieve high power ratings, by connecting only functional sub-devices together in the package, while being tolerant of defective sub-devices by selectively excluding the defective sub-devices. The packages and methods are particularly relevant to GaN power switching devices such as high electron mobility transistors (GaN HEMT).

Abstract: The present disclosure relates to organic electroluminescent materials and organic electroluminescent devices, in particular, discloses a compound of formula (1), wherein R1, R2, R3 and R4 are each independently selected from hydrogen, a substituted or unsubstituted C1-20 alkyl, a substituted or unsubstituted C3-20 cycloalkyl, a substituted or unsubstituted aromatic hydrocarbyl, or a substituted or unsubstituted aromatic heterocyclic group; and at least one of R1, R2, R3 and R4 contains a group having a hole-transporting ability; and at least one of R1, R2, R3 and R4 contains a group having an electron-transporting ability; A and B each independently represent hydrogen, a substituted or unsubstituted, fused aromatic ring, or a substituted or unsubstituted, fused heteroaromatic ring containing a heteroatom(s) selected from O, N and S.

Abstract: A system and method for on demand test drives that can include managing a set of vehicle and worker resources in a resource management system; monitoring user browsing patterns of a customer on an online vehicle marketplace; receiving a test drive request from the customer, the request specifying a requested vehicle and test drive location; retrieving test drive availability options from the resource management system; setting a test drive appointment for a selected test drive availability option; coordinating worker and vehicle transport to a scheduled location of the test drive appointment; and delivering vehicle information during the test drive appointment.

Abstract: An electric power steering system and its brush motor are disclosed. The brush motor includes a stator and a rotor rotatably mounted to the stator. The rotor includes a rotary shaft, a commutator and a rotor core fixed to the rotary shaft, and a rotor winding wound around the rotor core. The commutator includes a plurality of commutator segments. The rotor core includes a plurality of teeth. The rotor winding includes a plurality of winding elements. Adjacent teeth define therebetween wire slots for receiving the winding elements. The winding elements include a plurality of first winding elements and a plurality of second winding elements. The first winding elements are connected in series through the commutator segments. The second winding elements are connected in series through the commutator segments. The first winding elements and the second winding elements are received in different wire slots. Implementation of the present invention can improve the reliability of the product.

Abstract: An imaging device for imaging of a local area surrounding the imaging device. The imaging device includes a lens assembly, a filtering element and a detector. The lens assembly is configured to receive light from a local area surrounding the imaging device and to direct at least a portion of the received light to the detector. The filtering element is placed in the imaging device within the lens assembly such that light is incident at a surface of the filtering element within a range of angles determined by a design range of angles at which the filtering element is designed to filter light. The detector is configured to capture image(s) of the local area including the filtered light. The imaging device can be integrated into a depth camera assembly for determining depth information of object(s) in the local area based on the captured image(s).

Abstract: Disclosed are a crystal of a maleate of a compound of formula (I), a preparation method for the crystal, a crystallization composition of same, a pharmaceutical composition of same, and uses thereof in preventing and treating a tumor.

Abstract: A gate driver circuit for a gallium nitride (GaN) power transistor includes a RS-flipflop that receives a first pulse train at an S input terminal and a second pulse train at an R input terminal, and produces an output pulse train, and an amplifier that amplifies the output pulse train and produces a gate driver signal for the GaN power transistor. The RS-flipflop and the amplifier may be implemented together on a GaN monolithic integrated circuit, optionally together with the GaN power transistor. The GaN power transistor may be a high-side switch of a half-bridge circuit. The RS-flipflop may be implemented with enhancement mode and depletion mode GaN high electron mobility transistors (HEMTs). Embodiments avoid drawbacks of prior hybrid (e.g., silicon-GaN) approaches, such as parasitic inductances from bonding wires and on-board metal traces, especially at high operating frequencies, as well as reduce implementation cost and improve performance.

Abstract: Provided are a crystal and salt of an m-dihydroxybenzene derivative represented by formula (I), a manufacturing method thereof, and an application of the crystal in preparing a pharmaceutical product for treating a HSP90-mediated disease.

Abstract: Resonant converters with wide voltage gain ranges are achieved by controlling at least one of the primary side resonant circuit and the secondary side rectifier circuit. A switch is included in at least one of the primary or secondary sides, and control of the switch according to a selected mode determines an output voltage of the resonant converter. Embodiments accommodate wide input and output voltage ranges, and are suitable for use in AC-DC power adapters for portable devices with different voltage requirements, such as cell phones, tablets, and notebook computers, as well as in DC-DC converter applications including electric vehicle power systems.

Abstract: The present application belongs to the field of medicinal chemistry, and relates to crystals of an aniline pyrimidine compound serving as an EGFR inhibitor. Specifically, the present application relates to crystal A, crystal B and crystal C of N-(2-((2-(dimethyl amino)ethyl)(methyl)amino)-4-methoxy-5-(4-(3-methyl-2-oxo-2,3-dihydro-1H-benzo[d]imidazole-1-base)pyrimidine-2-base amino)phenyl)acrylamide (formula I) hydrochloride, and also relates to the method for preparing the crystal A, the crystal B and the crystal C, a crystal composition comprising the crystal A, the crystal B, and the crystal C, a pharmaceutical composition comprising the crystal A, the crystal B and the crystal C or the crystal composition thereof, and medical uses thereof. The crystal A, the crystal B and the crystal C in the present application has the advantages of high purity, high crystallization degree, good stability and the like.

Abstract: Packaging methods and structures for lateral high voltage gallium nitride (GaN) devices achieve electrical isolation while also maintaining thermal dissipation. The electrical isolation reduces or eliminates vertical leakage current, improving high voltage performance. The packages may use or be compatible standards such as JEDEC, which reduces packaging cost and facilitates implementation of the packaged devices in conventional circuit design approaches.

Abstract: A method of determining a hard disk operation status is for determining an operation status of an electronic device which comprises a SGPIO port and a hard disk. The method comprises receiving an operation status raw signal of the hard disk through the SGPIO port, determining whether receiving a previous operation status raw signal of the hard disk has been performed before an operational period before receiving the operation status raw signal, generating an operation status adjusted signal according to the operation status raw signal of the hard disk and an enabled status signal of the SGPIO port when determining that receiving the previous operation status raw signal has not been performed before an operational period before receiving the operation status raw signal, and performing a delay procedure on the operation status adjusted signal according to a preset time interval to generate and output an operation status determined signal.

Abstract: A three-dimensional integration of synapse circuitry is formed. One or more neuron layers each comprises a plurality of computing elements, and one or more synapse layers each comprising an array of memory elements are formed on top of the one or more neuron layers. A plurality of staggered through-silicon vias (TSVs) connect the one or more neuron layers to the one or more synapse layers and operate as communication links between one or more computing elements in the one or more neuron layers and one or more memory elements in the one or more synapse layers.

Abstract: A method for preparing a liposome, comprising the step of: (1) dissolving a substance to be encapsulated and phospholipid in an organic solvent to obtain an organic phase, and then mixing the organic phase with water to obtain a liposome feed liquid; (2) extruding the liposome feed liquid obtained in step (1) by means of a polycarbonate membrane; and (3) lyophilizing same.

Abstract: The present disclosure provides a temperature-sensing device and a server, with the server including a chassis and a mainboard. A temperature-sensitive element is disposed at an inlet of the chassis, and the temperature-sensitive element is used for converting a temperature sensed in the inlet of the chassis to a temperature sensing data. The mainboard is disposed in the chassis and includes a temperature sensor and a host. An external temperature-sensing channel of the temperature sensor is communicatively connected to the temperature-sensitive element for transferring the temperature sensing data to the host. The function of sensing the temperature in the inlet of the chassis of the server can be implemented by the temperature sensing device and the server disclosed in the present disclosure, which reducing the product manufacturing costs. There is no need to test I2C signals on a temperature-sensor board, which reducing labor costs.

Abstract: An imaging device includes a focusing element, an image sensor, and an actuator configured to translate at least one of the image sensor and the focusing element relative to each other. A controller of the imaging device is configured to use the image sensor to capture an image frame including at least a portion of the image of the object, determine a current position of the image of the object in the image frame, determine a deviation of the current position from a target position of the image of the object in the image frame, and operate the actuator to reduce the deviation. In this manner, the image of the object may be brought to a center of a captured image frame. Such an imaging device may be used as a self-aligning eye-tracking camera in a near-eye display.

Abstract: The present disclosure discloses a camera module and a manufacturing method thereof, a display device and a manufacturing method thereof, in the field of display technology. The display panel includes a display substrate and a transparent cover plate on the display substrate. The camera module includes a camera and a transparent cover plate attached to the camera, wherein a part of the transparent cover plate is configured as a target optical lens which is used as an external optical lens of the camera, and the transparent cover plate is configured to protect a display device. With the present disclosure, the thickness of the camera module is reduced. The present disclosure is used for capturing an image.

Abstract: Embodiments described herein provide a storage management system. During operation, the system receives information indicating sets of pending load of a plurality of storage devices from one or more storage nodes of a distributed storage system. The set of pending load of a respective storage device includes a set of load from host operations and a set of load from background operations on the storage device. The system can receive a request for a target resource associated with a disk operation from a client node of the distributed storage system. The system then selects, from the plurality of storage devices, a storage device with the smallest set of pending load based on the sets of pending load as the target resource and sends the target resource to the client node.

Abstract: An imaging device for imaging of a local area surrounding the imaging device. The imaging device includes a lens assembly, a filtering element and a detector. The lens assembly is configured to receive light from a local area surrounding the imaging device and to direct at least a portion of the received light to the detector. The filtering element is placed in the imaging device within the lens assembly such that light is incident at a surface of the filtering element within a range of angles determined by a design range of angles at which the filtering element is designed to filter light. The detector is configured to capture image(s) of the local area including the filtered light. The imaging device can be integrated into a depth camera assembly for determining depth information of object(s) in the local area based on the captured image(s).

Abstract: The invention discloses a calculation method for dynamic fluid loss of acid-etched fracture considering wormhole propagation, which is applied to pad acid fracturing process, comprising the following steps: Step 1: dividing the construction time T of injecting acid fluid into artificial fracture into m time nodes at equal intervals, then the time step ?t=T/m and tn=n?t, where, n=0, 1, 2, 3, . . . , m, and to is the initial time; Step 2: calculating the fluid loss velocity vl(0) in the fracture at t0; Step 3: calculating the flowing pressure distribution P(n) in the fracture at tn; Step 4: calculating the width wa(n) of acid-etched fracture at tn; Step 5: calculating the wormhole propagation and the fluid loss velocity vl(n) at tn; Step 6: substituting the fluid loss velocity vl(n) into Step 3, and repeating Step 3 to Step 6 in turn until the end of acid fluid injection.