Abstract: A programmable graphic projection light source system for ophthalmology includes a light source, a flexible screen, a reflective coating, and a light-shielding plate that is located between the light source and a pupil. The light source irradiates light away from the light-shielding plate. The flexible screen is located opposite the light-shieling plate crossing the light source. The reflective coating is located opposite the light source crossing the flexible screen. After the light is reflected by a central, spherical face portion of the reflective coating, a part of the light transferring a pattern from the flexible screen is blocked by the light-shielding plate, and another part of the light irradiates orthographically onto a periphery of the pupil. After the light is reflected by a plane portion of the reflective coating, a part of the light transferring the pattern irradiates obliquely onto the pupil.

Abstract: A virtual wearing method for a mask includes: acquiring a facial image of a user; determining actual facial feature data according to the facial image; determining and displaying one or more matched first masks of various models according to the actual facial feature data; determining a target mask from the first masks according to received first input from the user; and generating wearing picture information according to the facial image and the target mask, and displaying the wearing picture information. It can not only accurately match a plurality of first masks of different types and sizes suitable for the facial features of the user according to the facial feature data of the user, but also generate and display the wearing picture information through virtual reality and other technologies, so as to simulate the effect of the user wearing the target mask.

Abstract: Disclosed are a silicon-aluminum alloy and its preparation method. The method comprises: adding aluminum metal or molten aluminum into a container, wherein the temperature of the molten aluminum is between 700° C. and 800° C.; adding a semi-metallic silicon raw material to the molten aluminum, closing a furnace cover, carrying out vacuumization, and introducing argon, to ensure that the interior of a magnetic induction furnace is in a positive-pressure state, and stirring the aluminum metal or molten aluminum with a graphite stirring head; powering on and heating so that the aluminum metal or molten aluminum is heated to 1000° C. or above and molten, and holding the temperature between 1000° C. and 1500° C.; and after alloying is completed, cooling the molten aluminum to 1000° C. or below, opening the furnace cover, pouring the silicon-aluminum alloy into a corresponding mold, and cooling for molding.

Abstract: In a method for synchronizing character display, motion data of a first character over a time period is obtained. A first phase parameter for the first character at an end of the time period is determined based on the motion data and a standard action cycle for a current action that is performed by the first character. A second phase parameter from the second terminal is received. The first phase parameter is adjusted based on the second phase parameter to obtain a third phase parameter. Updated motion data for the first character is generated based on the third phase parameter. The first character is displayed based on the updated motion data.

Abstract: Provided is a modeling method and apparatus for a model of tracing the origin of durians, and a method for tracing the origin of durians. The modeling method includes obtaining isotope analysis data of pulp and seeds of durians of a target production area; generating a model of tracing the origin for a corresponding target production area through a preset analysis modeling algorithm using the isotope analysis data and information of the corresponding target production area; and validating an accuracy of the model of tracing the origin using the isotope analysis data of the target production area and other production areas, to obtain the accuracy of the model. The modeling method for a model of tracing the origin of durians of the present application performs isotope analysis on durians of the target production area, and generates a corresponding model of tracing the origin after obtaining isotope analysis data.

Abstract: In a method for fabricating a semiconductor device, an initial stack of alternatingly sacrificial word line layers and insulating layers is formed over a substrate of the semiconductor device. A connection region, a first staircase region, and a second staircase region are patterned in the initial stack. The first staircase region is shaped in the initial stack to form a first staircase, and the second staircase region is shaped in the initial stack to form a second staircase. The first staircase is formed in a first block of the initial stack and extends between first array regions of the first block. The second staircase is formed in a second block of the initial stack and extends between second array regions of the second block. The connection region is formed in the initial stack between the first staircase and the second staircase.

Abstract: A computing system may access first alpha values associated with first pixels in a first pixel region of an image and determine a bit budget for encoding the first alpha values. The computing system may then select a first alpha-encoding mode for the first alpha values to reflect a determination that the first alpha values are all fully transparent or all fully opaque, and encode the first alpha values by storing the selected first alpha-encoding mode as part of a metadata without using the bit budget to encode the first alpha values individually. The computing system may then update a record of unallocated bits available for allocation based on the bit budget unused in the encoding of the first alpha values, and allocate, based on the record of unallocated bits, bits to encode a set of alpha values different from the first alpha values.

Abstract: The invention provides a roadside computing system (RCS), or an edge computing system, for an autonomous vehicle. The RCS comprises a hierarchy of roadside unit (RSU) and an onboard unit (OBU) in an individual vehicle. The RSU comprises a data processing module and a communication module, and is capable of generating guidance information and targeted instructions for individual vehicle. The data processing module of the RSU comprises two processors: an External Object Calculating Module (EOCM) and an AI processing unit. Thus, the RCS utilizes roadside edge computing power and AI models to support autonomous driving for the vehicle. The OBU comprises a data processing module, a communication module, and a vehicle control module, and is capable of generating vehicle-specific targeted instruction for the vehicle based on guidance information and targeted instructions received from RSUs, and controlling the vehicle based on vehicle-specific targeted instruction.

Abstract: AC-DC-AC converter for delivering power to an electric motor from a power source is presented. The AC-DC-AC converter comprises a front-end converter and a motor-end converter connected through a DC link, the DC link voltage being generated and controlled by the front-end converter.

Abstract: AC-DC-AC converter for delivering power to an electric motor from a power source is presented. The AC-DC-AC converter comprises a front-end converter and a motor-end converter connected through a DC link, the DC link voltage being generated and controlled by the front-end converter.

Abstract: A power supply system for arc furnace is described. The power supply system includes a power converter intended to be connected to a polyphase supply grid and a polyphase transformer comprising a primary circuit connected to the power converter and a secondary circuit intended to be connected to at least one electrode of the arc furnace. The power converter includes an input device, a link circuit that has a first bus and a second bus, and an output device. The power supply system further includes a command circuit configured to command the input device and the output device to supply the electrode and to stabilize the courant and the voltage delivered by the grid when the electrode of the arc furnace is supplied by the power supply system to reduce rejections in the grid.

Abstract: Provided are modular multilevel converter and hybrid modular multilevel converters. Each of the modular multilevel converters and hybrid modular multilevel converters include submodules. Each submodule includes a first half bridge converter, a second half bridge converter, and a dual active bridge converter having a first connection, a second connection, a third connection and a fourth connection. The first half bridge converter is interconnected with the first and second connections via a first capacitor included in the first half bridge and the second half bridge converter is interconnected with the third and fourth connections via a second capacitor included in the second half bridge.

Abstract: Provided is a power converter that includes at least one leg having a first string that includes a plurality of switching units, a plurality of unidirectional current switches, a first connecting node, and a second connecting node, such that the first string is operatively coupled across a first and a second bus, and a second string operatively coupled to the first string via the first connecting node and the second connecting node such that the second string includes a plurality of unidirectional current switches and a fourth connecting node operatively coupled to a fourth bus. The power converter also includes a controller configured to control switching of the plurality of switching units.

Abstract: An audio and video synchronization method and device (100) for a playback module, an electronic device (10) and a computer-readable storage medium are disclosed. The playback module includes an object-oriented program language standard library and an audio and video synchronization module of a kernel driver. The method includes: determining, in response to a playback instruction, a target player to build an audio module and a video module by the target player; creating, in the program language standard library, a synchronization instance corresponding to the target player, the synchronization instance having a unique instance identifier; and obtaining a reference clock corresponding to a real-time code stream of the synchronization instance based on the instance identifier, and controlling, according to a set synchronization mode, data outputs of the audio module and the video module corresponding to the target player based on the reference clock.

Abstract: The present application belongs to the technical field of proteolysis-targeting chimeras (PROTACs), and discloses a PROTAC molecule and a preparation method and use thereof. A ligand for a target protein in the PROTAC molecule of the present application is a pyridine carboxylic acid-1-oxide derivative. In cell and zebrafish experiments, the PROTAC molecule exhibits no toxic and side effects at a drug concentration allowing a desired effect. At a cellular level, an inhibition level of the PROTAC molecule for human tyrosinase (TYR) reaches less than or equal to 1 ?mol/L. The PROTAC molecule in the present application can significantly reduce the generation of melanin by degrading TYR, and has excellent solubility, safety, and efficacy and a low effective concentration.

Abstract: Provided is an AC-DC-AC converter for delivering power to a load from a power source that includes a front-end converter, a load-end converter, and a DC link. At least one of the front-end converter and the load-end converter is a hybrid modular multilevel converter. The load-end converter or the front-end converter employ controllable switches in order to either direct or regulate power. The controllable switches can be controlled in order to modify the real and reactive power used/consumed or re-generated by the load (e.g., the electric arc furnace). The load-end converter control and the front-end converter control are independent or decoupled.

Abstract: Provided is an AC-DC-AC converter for delivering power to a load from a power source that includes a front-end converter, a load-end converter, and a DC link. The front-end converter being a hybrid modular multilevel rectifier, and the load-end converter being either a modular multilevel converter or a hybrid modular multilevel converter.

Abstract: This technology provides an Autonomous Vehicle (AV) Intelligent Driving System (IDS) that includes a sensing module for gathering driving environment data and an onboard unit (OBU) for vehicle control. The OBU features a vehicle control module and communication modules for guidance-level interaction with Traffic Control Centers (TCC/TCU) and Roadside Units (RSUs). The system receives targeted guidance instructions and information, such as vehicle maneuvering, safety maintenance, traffic control, and special conditions, to enhance driving tasks. The IDS collaborates with TCC/TCU and RSUs, providing redundancy and a fail-safe mechanism for increased safety and reliability. The system is designed with wireless communication capabilities for efficient information exchange and is applicable to connected and automated vehicles (CAVs).

Abstract: A signal processing apparatus includes a power amplifier and a power supply modulator. The signal processing apparatus obtains a first non-linear coefficient, where the first non-linear coefficient indicates a non-linear characteristic of the power amplifier and a non-linear characteristic of the power supply modulator. The signal processing apparatus performs non-linear preprocessing and correction on a first baseband signal based on the first non-linear coefficient, to obtain a first intermediate signal and a second intermediate signal. The signal processing apparatus performs digital-to-analog conversion on the first intermediate signal and then performs up-conversion processing, to obtain a third intermediate signal. The signal processing apparatus performs envelope processing on the second intermediate signal, to obtain a first envelope signal. The signal processing apparatus modulates the first envelope signal by using the power supply modulator, to obtain a first control voltage signal.

Abstract: Provided is a hybrid modular multilevel converter (HMMC) based on a neutral point clamped (NPC) topology and having an ABC N-phase structure. The HMMC includes N pairs of identical upper and lower arms, each upper and lower arm being composed of X submodules and Y sets of switches. The switches within each set are cascaded and connected in series, each of the submodules is formed of full-bridge silicon (Si) insulated-gate bipolar transistor (IGBT) converters, and at least one of the set of switches is formed of IGBTs of opposite polarities.