Abstract: An apparatus is configured according to a transformer based step down topology is provided. The apparatus includes a first transformer that transfers energy from a primary side of the first transformer to a secondary side of the first transformer for driving a load at the secondary side. The apparatus includes a first inductor and a second inductor electrically coupled at the secondary side. The apparatus includes a primary side directional conducting element and a secondary side directional conducting element configured to perform a first phase of transferring the energy through the first inductor and a second phase of transferring the energy through the second inductor. The first inductor induces the second inductor to transfer energy during the first phase and the second inductor induces the first inductor to transfer energy during the second phase.

Abstract: An aluminum borate whisker reinforced and toughened non-metallic matrix composite is provided, which specifically includes a non-metallic material reinforced and toughened with aluminum borate whiskers. The composite exhibits a higher bending strength and fracture toughness and a higher wear resistance. A method for preparing the composite is also provided. The method includes mixing the aluminum borate whiskers and the non-metallic material to form a mixture; and sintering the mixture by a vacuum hot press method, or molding the mixture.

Abstract: This application provides a virtual gift display method. The method includes: receiving virtual gift information, where the virtual gift information includes a given target virtual gift and a giving quantity of target virtual gifts; obtaining at least two gift pictures corresponding to the target virtual gift from a gift picture material library; splicing the at least two obtained gift pictures based on the giving quantity of target virtual gifts and a preset splicing rule, to obtain a bullet-screen comment picture; and displaying the bullet-screen comment picture in a bullet-screen comment area. In this way, a virtual gift given by a user can be displayed by using a bullet-screen comment function built in a live room, without a need to redevelop a virtual gift display function, to greatly reduce development costs and development time. In addition, a bullet-screen comment and a gift giving function may be combined, to improve user experience.

Abstract: Disclosed is a method for identifying fragile lines in power grid based on electrical betweenness, which comprises the following steps: constructing the power grid into a network diagram, sequentially removing lines in the network diagram, and sorting the electrical betweenness of each line from large to small; constructing a nonlinear model of complex network cascade failure considering overload and weighted edges, and respectively performing two ways of removing lines for sorted electrical betweenness, namely sequentially removing preset proportion lines and sequentially removing all lines until no new lines are removed in the network diagram; obtaining a change of generator-load power before and after each line removal, and evaluating a severity of power grid failure based on the change of generator-load power, thus completing an identification of power grid fragile lines.

Abstract: An inspection system, including: at least one ray source rotatable between at least two scanning positions around a rotation axis, and a rotation angle of at least one ray source between two adjacent scanning positions is greater than an angle of adjacent target spots of each ray source relative to the rotation axis; a detector assembly, and a conveying device configured to carry an object to be inspected. At least one ray source and the detector assembly are movable in a traveling direction relative to the conveying device, so that the object to be inspected may enter an inspection region. When at least one ray source is located at one scanning positions, at least one ray source and the detector assembly move in the traveling direction relative to the conveying device and at least one ray source emits X-rays; after moving a predetermined distance, at least one ray source rotates around the rotation axis to another scanning position.

Abstract: Disclosed herein are novel compounds for treating apicomplexan parasite related disorders, methods for their use; cell line and non-human animal models of the dormant parasite phenotype and methods for their use in identifying new drugs to treat apicomplexan parasite related disorders, and biomarkers to identify disease due to the parasite and its response to treatment.

Abstract: The present invention relates to the technical field of mine fire prevention and extinguishing, in particular to a liquid nitrogen direct injection and low-temperature foaming intelligent filling system based on mine fire area characteristics and an application method, comprising a liquid nitrogen storage tank, a liquid nitrogen direct injection system and a low-temperature foaming system, wherein the liquid nitrogen storage tank communicates with a liquid nitrogen pressurizing device through a main pipeline; a temperature control unit is arranged on the main pipeline; and the liquid nitrogen pressurizing device is connected with the liquid nitrogen direct injection system and the low-temperature foaming system, respectively, liquid nitrogen is directly injected into a foam liquid, to prepare a low-temperature foam type fire preventing and extinguishing material by means of forced convection, membrane boiling, explosion boiling and nucleate boiling between the liquid nitrogen and water.

Abstract: A multi-channel detecting circuit including a priority-setting circuit and an ADC (analog-to-digital converting) circuit is provided. The priority-setting circuit receives a plurality of sampled signals and a set signal, and provides the plurality of sampled signals at different output frequencies determined by the set signal. The ADC circuit receives the plurality of sampled signals, and respectively converts the plurality of sampled signals to a plurality of digital signals one by one.

Abstract: Various methods and systems are disclosed to improve detection probability of time of flight lidar systems by generating real-time background signals for individual pixels of a sensor of the lidar detection system and use the background signals to dynamically control the detection system of the lidar. The background signals, that indicate the amount of background light received by different pixels, are used for controlling the detection system by adjusting at least one of the optical system, the sensor, and the readout system of the detection system in order to reduce the impact of the back ground light on the detection and range finding functionality of the lidar.

Abstract: Various methods and systems are disclosed to improve the reliability and accuracy of a time of flight lidar systems by generating real-time background signals for individual pixels of a sensor of the lidar detection system and use the background signals to generate confidence signals. The confidence signal indicates validity of a return signal or a probability that the return signal is not associated with interference with another lidar or light source. The confidence signals may be used by the lidar system to reduce the false alarm rate of the lidar.

Abstract: The present disclosure relates to a static CT detection device, including: a shielding body, formed with a detection channel through which an object under detection can pass; a ray source, emitting rays for detecting the object under detection when the object under detection passes through the detection channel; and a detector, for acquiring the rays emitted by the ray source and having passed through the detection channel, wherein the shielding body is formed with an opening portion, and the opening portion extends from an inlet of the detection channel to an outlet of the detection channel.

Abstract: An aluminum borate whisker reinforced and toughened non-metallic matrix composite is provided, which specifically includes a non-metallic material reinforced and toughened with aluminum borate whiskers. The composite exhibits a higher bending strength and fracture toughness and a higher wear resistance. A method for preparing the composite is also provided. The method includes mixing the aluminum borate whiskers and the non-metallic material to form a mixture; and sintering the mixture by a vacuum hot press method, or molding the mixture.

Abstract: Disclosed is a method for identifying fragile lines in power grid based on electrical betweenness, which comprises the following steps: constructing the power grid into a network diagram, sequentially removing lines in the network diagram, and sorting the electrical betweenness of each line from large to small; constructing a nonlinear model of complex network cascade failure considering overload and weighted edges, and respectively performing two ways of removing lines for sorted electrical betweenness, namely sequentially removing preset proportion lines and sequentially removing all lines until no new lines are removed in the network diagram; obtaining a change of generator-load power before and after each line removal, and evaluating a severity of power grid failure based on the change of generator-load power, thus completing an identification of power grid fragile lines.

Abstract: An apparatus such as a power supply includes a controller and multiple power converter phases. The controller controls operation of the multiple power converter phases to produce an output voltage that powers a load. The multiple power converter phases are coupled in parallel to convert an input voltage into an output voltage. The controller further controls a flow of current through a series circuit path connecting multiple windings of the multiple power converter phases to operate the power supply in different modes.

Abstract: A power system having a power input terminal adapted to receive a bus voltage and a sense terminal adapted to receive a sense voltage indicative of the bus voltage. The power system may further include a bi-directional converter having a first terminal and a second terminal. The first terminal of the bi-directional converter may be coupled to the power input terminal. In an embodiment, when the sense voltage is decreased to reach or to be lower than the reference voltage, the bi-directional converter may be adapted to be configured to operate in a release mode to provide a release voltage at the first terminal. The release voltage may vary in accordance with varying in a transition voltage threshold that is a voltage value of the bus voltage at a moment when the sense voltage decreases to reach the reference voltage.

Abstract: This application provides an optical device and a method of adjusting an optical device. The optical device includes an emitting assembly, a beam splitting assembly, and a receiving assembly. The emitting assembly is configured to emit an outgoing light signal. The beam splitting assembly is configured to pass the outgoing light signal from the emitting assembly to a detection region, receive a reflected light signal from the detection region, and modify a transmission direction of the reflected light signal. The receiving assembly is configured to receive the reflected light signal from the beam splitting assembly after the direction modification and generate an electrical signal in response to the reflected light signal.

Abstract: A low dropout regulator circuit with reduced overshoot and undershoot during transient state is discussed. The low dropout regulator circuit has a power device operating at a restive region, a first amplification stage and a second amplification stage. The first amplification stage amplifies a difference between a feedback voltage and a reference voltage to generate a positive signal and a negative signal. The feedback voltage is derived from an output voltage via a feedback resistor network. The second amplification stage amplifies a difference between the positive signal and a sum of a feed forward signal and the negative signal to generate an amplified signal. The feed forward signal is derived from an output voltage via a capacitor network.

Abstract: A method and system for advanced detection and optimization of tunnel resistivity based on depth resolution.