Abstract: The present disclosure provides processes for making enantiomerically pure isoxazoline compounds of formula (1), The present disclosure also provides processes for making enantiomerically pure isoxazoline compounds of formula (1) characterized by improving the enantiomeric purity of 3-methyl-5-[(5S)-5-(3,4,5-trichlorophenyl)-5-(trifluoromethyl)-4H-isoxazol-3-yl]thiophene-2-carboxylic acid by crystallization.

Abstract: A pitch control method based on cooperative optimization for an offshore wind farm, may include: acquiring a power control signal and a load reduction control signal of each wind turbine cluster; and generating, according to the power control signal and the load reduction control signal, a pitch control command based on a preset optimal control objective, and transmitting the pitch control command to a corresponding pitch control action execution mechanism for pitch control; wherein the power control signal is determined by an arithmetic processing unit through processing wind turbine parameters and wind speed data of the offshore wind farm, with a control objective of maximizing output power of the offshore wind farm; and the load reduction control signal is generated by a single-turbine controller for the wind turbine cluster utilizing key features affecting power outputs of wind turbines in combination with a linear time-invariant dynamic model for the wind turbines.

Abstract: A method for power distribution in an electricity-hydrogen hybrid energy storage system in a microgrid method includes: decomposing a current operating power of a microgrid into a to-be-smoothed power and a grid connection power; distributing the to-be-smoothed power according to a current SOC value of the electrochemical energy storage system and a current SOH value of the hydrogen energy storage system with a goal of minimizing operating costs to obtain a first optimal charge/discharge power required for controlling the electrochemical energy storage system to operate and a second optimal charge/discharge power required for controlling the hydrogen energy storage system to operate; and adjusting an SOC state of the electrochemical energy storage system according to a protection strategy determined by the to-be-smoothed power, a preset SOC operating range of the electrochemical energy storage system, and the current SOC value, while controlling an overall operating status of the microgrid.

Abstract: A gate clamping circuit for driving a wide bandgap (WBG) device is provided. The gate clamping circuit comprises: a semiconductor switching device having a high side terminal connected to a gate of the WBG device; and a low side terminal connected to a source of the WBG device; a clamping resistor having a first end connected to a negative power supply terminal of a driver chip; and a second end connected to a control terminal of the semiconductor switching device; and a clamping capacitor having a first end connected to the second end of the clamping resistor; and a second end connected to the low side terminal of the semiconductor switching device; wherein the gate clamping circuit is configured to clamp negative voltage spike generated at the gate of the WBG device to suppress overstress of the gate of the WBG device when a negative off-state gate voltage is applied.

Abstract: A GaN/SiC cascode power device is formed with first and second transistor groups. The first transistor group has one or more low-voltage normally-off GaN high-electron-mobility transistors. The second group has one or more high-voltage normally-on SiC junction-field-effect transistors. A backbone layer mechanically supports respective transistors in the two transistor groups and provides electrical connectivity among the respective transistors. The backbone layer is formed by embedding a network of conductive traces on or within an insulating rigid layer. The respective transistors are mounted on the backbone layer and electrically connected via the network of conductive traces. Advantageously, bonding wires are absent in providing intra-connection between the two transistor groups. Undesirable interconnection inductances are considerably reduced such that switching loss and switching oscillation, both overstressing the power device during a switching process, are suppressed.

Abstract: The present disclosure relates to a double-layer turret multi-grating on-axis rotation module and a spectrometer. The module includes a grating turret assembly, and the grating turret assembly includes a turret base and a plurality of grating elements provided on the turret base; a first rotation assembly, and the turret base is connected to the first rotation assembly, a rotation axis of the first rotation assembly and a central axis of the plurality of grating elements are on a same vertical line, and the grating turret assembly is driven to rotate by the first rotation assembly; a second rotation assembly, and the first rotation assembly is connected to the second rotation assembly.

Abstract: This application provides a key negotiation method, apparatus, and system, and may be applied to the communications field, for example, short-range communication (including a cockpit domain). During key negotiation between a first device and a second device, the first device notifies, by using first information, the second device of all key negotiation algorithms supported by the first device, and the second device selects, from the received key negotiation algorithms supported by the first device, a key negotiation algorithm supported by the second device. In this way, the key negotiation algorithm selected by the second device is supported by both the first device and the second device.

Abstract: This present disclosure provides a method for preparing chondroitin sulfate from tilapia skull, including enzymatic hydrolyzing tilapia skull powder by Savinase 16L to obtain Savinase 16L enzymatic hydrolysate, re-enzymatic hydrolyzing the Savinase 16L enzymatic hydrolysate by 2709 alkaline protease, then separating and purificating the solution by ethanol and cetylpyridine chloride to obtain the chondroitin sulfate. The present disclosure adopts a compound enzymatic hydrolyzing method by Savinase 16L and 2709 alkaline protease to effectively achieve the efficient extraction of chondroitin sulfate of tilapia skull powder, and further achieve the purification of chondroitin sulfate by ethanol and cetylpyridine chloride, so that tilapia by-products can be utilized with high value.

Abstract: The present disclosure provides a rotor unit, a rotor, and a motor structure. The rotor unit includes: a rotor punching sheet; a plurality of magnet units comprising a magnet and arranged on the rotor punching sheet; and a hole structure arranged in the magnet. The rotor includes a plurality of rotor units. The motor structure includes: the rotor, a first flow guide plate having a central hole and arranged between two adjacent rotor units, and a central shaft passing through a center of the rotor and the central hole. The present disclosure can effectively reduce the cost of the magnets, and can achieve a direct cooling of the magnets, the rotor and the stator, reduce the eddy current effect, reduce costs, and greatly expand an optimization and use range of the motors when applied in the motors.

Abstract: A high electron mobility transistor (HEMT) device including a substrate and a semiconductor stack is provided. The semiconductor stack comprises a lower channel layer, an insertion layer (ISL) positioned above the lower channel layer for confining electrons in the lower channel layer, an upper channel layer, an interface enhancement layer (IEL) positioned above the upper channel layer for confining the electrons in the upper channel layer, and a barrier layer positioned above the IEL. The ISL and the IEL are formed above the lower channel layer and the upper channel layer respectively to create a first and second wide bandgap heterojunction. The ISL and the IEL each provides a higher energy band with a potential barrier with respect to the electrons generated between the ISL and the lower channel layer, and between the IEL and the upper channel layer. The potential barrier prevents or reduces a flow of hot electrons.

Abstract: A display panel and a method for manufacturing the same, and a displaying device, which relates to the technical field of displaying. The display panel includes: a displaying substrate, a color light filtering layer disposed at a light exiting side of the displaying substrate. The color light filtering layer includes a first light filtering structure and a second light filtering structure of unequal thicknesses, orthographic projections of the light filtering structures on the displaying substrate cover corresponding positions of the light emitting region, and a surface of the first light filtering structure at one side away from the displaying substrate and a surface of the second light filtering structure at one side away from the displaying substrate are in a same plane.

Abstract: Mechanically and piezoelectrically anisotropic polymer fibers may be formed by spinning a polymer solution or gel that includes a high molecular weight crystallizable polymer and a liquid solvent. The solvent may be configured to interact with the polymer to facilitate chain alignment and, in some examples, create a higher crystalline content within the spun fibers. The polymer solution may also include a low molecular weight additive. The high and low molecular weight polymers may each be characterized by a bimodal molecular weight distribution where the molecular weight of the additive is less than the molecular weight of the crystallizable polymer. The polymer(s) and the additive(s) may be independently selected from vinylidene fluoride, trifluoroethylene, chlorotrifluoroethylene, hexafluoropropene, vinyl fluoride, etc. The spun fibers may be oriented, annealed, poled, and woven or laminated to form a polymer thin film having a high elastic modulus and a high electromechanical coupling factor.

Abstract: Disclosed herein is a composition including a recombinant nucleic acid sequence that encodes an antibody to a Respiratory Syncytial Virus antigen. Also disclosed herein is a method of generating a synthetic antibody in a subject by administering the composition to the subject. The disclosure also provides a method of preventing and/or treating an Respiratory Syncytial virus infection in a subject using the composition and method of generation.

Abstract: A gate-driving circuit for controlling a cascode power device to switch on or off while suppressing ground bounce has a gate-driving signal generator and a local power supply. The gate-driving signal generator, which receives an external control signal and accordingly generates a gate-driving signal to drive a gate of the cascode power device, is entirely powered by the local power supply. The local power supply is powered with raw electrical power received from an M point of the cascode power device such that the gate-driving circuit is self-powered without connecting to an external power supply. It avoids a need to install an isolation circuit for ground isolation between the external power supply and the cascode power device for suppressing ground bounce. Advantageously, elimination of the external power supply and isolation circuit leads to a simplified and more-compact design of the gate-driving circuit.

Abstract: A cooling device and method for a high-temperature superconducting motor of a hydrogen-powered aircraft based on a dual evaporation-condensation cycle is provided. The latent heat of vaporization of liquid hydrogen fuel in the hydrogen-powered aircraft is used as the cooling source of the superconducting motor. The internal evaporation-condensation cycle can meet the cooling requirements of the superconducting motor during normal operation, and the external evaporation-condensation cycle can be used as a supplement to the cooling capacity of the device when the internal evaporation-condensation cycle is damaged or cannot meet the requirements. The coupling of the two effectively increases the adaptability of the cooling device to complex environments.

Abstract: Disclosed are a step-down and phase-shifting transformer and an operational control method thereof. The step-down and phase-shifting transformer is connected to grids on at least two sides and at least includes a first winding, a second winding, and a third winding. The third winding is provided with a tap-position adjustment switch, the third winding is magnetically coupled to the first winding and the second winding, and the third winding is electrically connected to the first winding or the second winding, such that phase angle control and transmission power control between grids on different sides can be realized by adjusting the tap-position adjustment switch on the basis of voltage transformation.

Abstract: A digital twin modeling method for an electro-hydraulic actuator with edge-cloud collaboration is provided in the present disclosure.

Abstract: A light-emitting device includes a broadband chip and an encapsulant. A full width at half maximum (FWHM) of the broadband chip is greater than or equal to 20 nanometers. The encapsulant is coated on the broadband chip. The encapsulant includes red fluoride phosphor. According to the light-emitting device, the encapsulant layer with red fluoride phosphor is excited by using the broadband chip with the FWHM greater than or equal to 20 nanometers, so that the light-emitting device can emit white light with high light efficiency and low color shift value, thereby solving the problem of serious color shift caused by red fluoride phosphor.

Abstract: Packaging for a patient interface comprises: a plurality of panels arranged to be folded inwardly to define a housing for the patient interface, the plurality of panels comprising a pair of opposed side panels and a pair of opposed end panels; and a panel-retaining structure that is arranged to prevent outward collapse of the panels such that the patient interface is held in a compressed state; wherein at least one of the panels comprises at least one patient interface retaining feature that is attachable to the patient interface; and wherein the panel-retaining structure is releasable to cause the patient interface in the compressed state to urge one or more of the panels outwardly, to thereby enable display of the patient interface in a substantially in-use configuration.