Abstract: The disclosure relates to the technical filed of organic synthesis, in particular to a method for preparing veratrole. In the disclosure, veratrole is prepared by using lithium hydroxide instead of sodium hydroxide, catechol as raw material, and dimethyl sulfate as methylating agent. Comparing with the existing method of adding sodium hydroxide solution, the method according to the disclosure allows reduced reaction temperature, shortened reaction time, and thereby improves the stability and safety of the reaction and the product yield. The experimental data of the examples in the disclosure shows a veratrole yield up to 95%. Furthermore, the preparation method according to the disclosure does not need to be carried out under a reflux condition, the operation of which is simpler, thereby further improving the safety and stability of the reaction.

Abstract: Embodiments relate to the field of superhard materials, and to a polycrystalline diamond compact (PDC) and a preparation method therefor, and a cemented carbide substrate. The cemented carbide substrate includes a binding phase and a tungsten carbide. The binding phase includes a cobalt and a metal additive. The metal additive is selected from one or more of nickel, chromium, manganese, molybdenum, tin, copper, palladium, silver, aluminum, and platinum. By introducing specific elements and controlling proportions of the elements, the corrosion-resistant binding phase is formed, thereby improving the corrosion resistance of the cemented carbide substrate. Due to that the corrosion-resistant binding phase changes the corrosion mechanism of the cemented carbide substrate, the changed corrosion mechanism is more adapted to the usage scenarios of the PDC, effectively improving the corrosion resistance and erosion resistance of the PDC, and thereby improving the service life of the PDC.

Abstract: Provided is the use of Bacteroides fragilis in the improvement and/or treatment of diarrhea. Tests of different mouse diarrhea models prove that Bacteroides fragilis ZY-312 with the deposit number CGMCC No. 10685 or inactivated Bacteroides fragilis ZY-312 has the effect of improving and treating diarrhea. The powder of the inactivated Bacteroides fragilis has a good effect of improving infectious diarrhea or non-infectious diarrhea in different concentrations of the formula, and has no side effects on the body.

Abstract: Nano- and micro-particles (NMP) can be formed from an oil/water emulsion. The emulsion is made by mixing a liquid solvent, at least one surfactant, a particle-forming compound, and at least curing agent. If desired, pH control agents and viscosity enhancers can be added to the liquid solvent. The particle-forming compound and the curing agents are mixed together and form the oil phase in the emulsion and after curing, the particles are formed. The nano- and micro-particles can be used as proppant to enhance the conductivity of nano- and microfractures and fluid-loss-control additive for hydraulic fracturing operations.

Abstract: The present disclosure provides a power conversion circuit and a power conversion method. The power conversion circuit includes: a flying capacitor; an energy storage capacitor; and a rectifier configured to turn on a charge path through which the flying capacitor is charged by the AC input voltage or a transfer path from the flying capacitor to the energy storage capacitor selectively according to a direction of the AC input voltage, so as to provide the DC output voltage across ends of the energy storage capacitor, wherein the rectifier is further configured to stabilize the DC output voltage within a set range by controlling a discharge path of the flying capacitor to ground. Compared with conventional AC-DC converters, no high-voltage device and other rectifying circuit is needed in the power conversion circuit of the present disclosure, so as to reduce structure complexity and cost of the circuit greatly.

Abstract: The embodiments of the present invention disclose a line protection method and a related apparatus for a flexible grounding system of a power distribution network. The method comprises outputting a first compensation voltage by a voltage source of a flexible grounding device of each line of a target power distribution network in the case where a ground fault occurs in the target power distribution network; starting to calculate the zero-sequence impedance of each line in real time by the zero-sequence impedance protection device; after the first compensation voltage is output for a first output duration, outputting a second compensation voltage; calculating the zero-sequence impedance of each line in real time by the line zero-sequence impedance protection device; determining a fault line by the zero-sequence impedance protection device, and cutting off the fault line to isolate the ground fault after a trip for a preset time delay.

Abstract: The present disclosure provides a method and system for quantifying a degree of blending of virgin and aged asphalt in HRAM. The method includes the following steps: first, constructing a relational equation between the microscale modulus of recycled asphalt in a fully blended state and the content of the aged asphalt; measuring the microscale modulus of the recycled asphalt, the microscale modulus of the aged asphalt, the microscale modulus of the virgin asphalt, and the content of the aged asphalt in the HRAM in situ; inputting the dates above into the relational equation to obtain the microscale modulus of the recycled asphalt in the fully blended state; and based on the microscale modulus of the recycled asphalt measured in situ and the microscale modulus of the recycled asphalt in the fully blended state, obtaining the degree of blending of the virgin and aged asphalt in the HRAM.

Abstract: Disclosed are smart glasses and a manufacturing method therefor. The smart glasses comprise a first assembly comprising a front crossbeam portion, a camera assembly and an optical mechanical assembly; and a second assembly comprising a rear crossbeam portion, a first temple and a second temple, wherein the first assembly is inserted into the second assembly. The first temple is provided with a first cavity; and the second temple is provided with a second cavity. A hollow passage for communicating the first cavity with the second cavity is enclosed by the front crossbeam portion and the rear crossbeam portion, the camera assembly is at least partially arranged in the first cavity, and the optical-mechanical assembly is at least partially arranged in the second cavity. The disclosed smart glasses have improved performance with enhanced convenience of assembly and ease of operation.

Abstract: A preparation method of a low-lactose dairy product rich in honey pomelo fiber includes the following steps: washing, cutting and debitterizing peels of honey pomelos to obtain honey pomelo fiber pieces; sterilizing and cooling milk solution, performing the first-round fermentation by inoculating lactic acid bacteria, centrifuging the fermented milk after curding, collecting precipitates, adding water to the precipitates, and performing homogenizing treatment to obtain the first-round fermented milk; mixing the honey pomelo fiber pieces with the first-round fermented milk, and performing the second-round fermentation by inoculating the lactic acid bacteria; or performing the second-round fermentation by inoculating the first-round fermented milk with the lactic acid bacteria, and then mixing the second-round fermented milk with the honey pomelo fiber pieces; and prefreezing the treated honey pomelo fiber pieces treated in the previous step and then performing vacuum freeze-drying to obtain low-lactose dairy p

Abstract: A production method for a chip-type lamp bead capable of emitting polychromatic light relates to the technical field of LED lamp beads, including steps: a first process: die bonding, for fixing a chip to a supporting plate; a second process: wire bonding, for linking positive and negative electrodes of the chip to a bracket; a third process: molding, for packaging the material with an epoxy resin after prior two steps, and different light colors are achieved through matching with different phosphors; a fourth process: cutting, for cutting the molded material into single materials; a fifth process: light splitting, for splitting light in the material having been cut; and a sixth process: braiding, packaging and shipping. Multiple LED chips can be integrated inside a chip-type lamp bead, each chip can emit light independently and control different colors, and thus the same lamp bead can achieve free mixing of multiple colors.

Abstract: A respiratory ventilation apparatus configured to deliver a respiratory gas to a patient interface is provided. The apparatus may include a gas pressurization unit configured to generate a pressurized respiratory gas, a gas inlet port configured to introduce the respiratory gas into the respiratory ventilation apparatus, a gas outlet port configured to discharge the pressurized respiratory gas to a respiration tube, a detection module configured to detect the pressure of the pressurized respiratory gas, at least one non-volatile memory configured to store a plurality of parameters and a plurality of programs, and one or more controllers. The one or more controllers may be configured to initiate the respiratory ventilation apparatus upon a boot operation, and/or initiate a program that constantly reads information from the detection module, and controls the pressure of the pressurized respiratory gas using the information read from the detection module and at least one parameter.

Abstract: The invention relates to a process for the preparation of a catalyst ink formulation, said process comprising the steps of: (i) providing a mixture comprising a catalyst, an ionomer and water that has been subjected to ball milling; and (ii) subjecting the mixture to an ultrasonication step for a time period of from about 1 minute to about 1 hour.

Abstract: A respiratory ventilation apparatus configured to deliver a respiratory gas to a patient interface is provided. The apparatus may include a gas pressurization unit configured to generate a pressurized respiratory gas, a gas inlet port configured to introduce the respiratory gas into the respiratory ventilation apparatus, a gas outlet port configured to discharge the pressurized respiratory gas to a respiration tube, a detection module configured to detect the pressure of the pressurized respiratory gas, at least one non-volatile memory configured to store a plurality of parameters and a plurality of programs, and one or more controllers. The one or more controllers may be configured to initiate the respiratory ventilation apparatus upon a boot operation, and/or initiate a program that constantly reads information from the detection module, and controls the pressure of the pressurized respiratory gas using the information read from the detection module and at least one parameter.

Abstract: A respiratory ventilation apparatus configured to deliver a respiratory gas to a patient interface is provided. The apparatus may include a gas pressurization unit configured to generate a pressurized respiratory gas, a gas inlet port configured to introduce the respiratory gas into the respiratory ventilation apparatus, a gas outlet port configured to discharge the pressurized respiratory gas to a respiration tube, a detection module configured to detect the pressure of the pressurized respiratory gas, at least one non-volatile memory configured to store a plurality of parameters and a plurality of programs, and one or more controllers. The one or more controllers may be configured to initiate the respiratory ventilation apparatus upon a boot operation, and/or initiate a program that constantly reads information from the detection module, and controls the pressure of the pressurized respiratory gas using the information read from the detection module and at least one parameter.

Abstract: A respiratory ventilation apparatus configured to deliver a respiratory gas to a patient interface is provided. The apparatus may include a gas pressurization unit configured to generate a pressurized respiratory gas, a gas inlet port configured to introduce the respiratory gas into the respiratory ventilation apparatus, a gas outlet port configured to discharge the pressurized respiratory gas to a respiration tube, a detection module configured to detect the pressure of the pressurized respiratory gas, at least one non-volatile memory configured to store a plurality of parameters and a plurality of programs, and one or more controllers. The one or more controllers may be configured to initiate the respiratory ventilation apparatus upon a boot operation, and/or initiate a program that constantly reads information from the detection module, and controls the pressure of the pressurized respiratory gas using the information read from the detection module and at least one parameter.

Abstract: A respiratory ventilation apparatus configured to deliver a respiratory gas to a patient interface is provided. The apparatus may include a gas pressurization unit configured to generate a pressurized respiratory gas, a gas inlet port configured to introduce the respiratory gas into the respiratory ventilation apparatus, a gas outlet port configured to discharge the pressurized respiratory gas to a respiration tube, a detection module configured to detect the pressure of the pressurized respiratory gas, at least one non-volatile memory configured to store a plurality of parameters and a plurality of programs, and one or more controllers. The one or more controllers may be configured to initiate the respiratory ventilation apparatus upon a boot operation, and/or initiate a program that constantly reads information from the detection module, and controls the pressure of the pressurized respiratory gas using the information read from the detection module and at least one parameter.

Abstract: A respiratory ventilation apparatus configured to deliver a respiratory gas to a patient interface is provided. The apparatus may include a gas pressurization unit configured to generate a pressurized respiratory gas, a gas inlet port configured to introduce the respiratory gas into the respiratory ventilation apparatus, a gas outlet port configured to discharge the pressurized respiratory gas to a respiration tube, a detection module configured to detect the pressure of the pressurized respiratory gas, at least one non-volatile memory configured to store a plurality of parameters and a plurality of programs, and one or more controllers. The one or more controllers may be configured to initiate the respiratory ventilation apparatus upon a boot operation, and/or initiate a program that constantly reads information from the detection module, and controls the pressure of the pressurized respiratory gas using the information read from the detection module and at least one parameter.

Abstract: A respiratory ventilation apparatus configured to deliver a respiratory gas to a patient interface is provided. The apparatus may include a gas pressurization unit configured to generate a pressurized respiratory gas, a gas inlet port configured to introduce the respiratory gas into the respiratory ventilation apparatus, a gas outlet port configured to discharge the pressurized respiratory gas to a respiration tube, a detection module configured to detect the pressure of the pressurized respiratory gas, at least one non-volatile memory configured to store a plurality of parameters and a plurality of programs, and one or more controllers. The one or more controllers may be configured to initiate the respiratory ventilation apparatus upon a boot operation, and/or initiate a program that constantly reads information from the detection module, and controls the pressure of the pressurized respiratory gas using the information read from the detection module and at least one parameter.

Abstract: Provided are a cover opening and closing member, a container cover, a container body, a container device and a ventilation therapy apparatus. The cover opening and closing member includes: a connection rod, a cover universal connector, a supporting universal joint and a pendulum, the cover universal connector is configured to be in universal rotation fit with a universal connection portion on a container cover, the cover universal connector includes a first universal rotation mating surface that is in universal rotation fit with a second universal rotation mating surface; the supporting universal joint is configured to be in universal rotation fit with a supporting universal cavity on a supporting frame in a container internal cavity of a container body; the cover universal connector, the supporting universal joint and the pendulum are sequentially arranged on the connection rod at intervals.

Abstract: A humidification assembly configured to humidify a pressurized respiratory gas is provided. The humidification assembly may include a liquid chamber configured to accommodate one or more liquids, the liquid chamber including a tank and a tank cover. The tank cover includes a shell, a humidification assembly gas inlet port, a humidification assembly gas outlet port, a first gas passage including an output port, and a second gas passage including an input port. The humidification assembly gas inlet port is configured to introduce the pressurized respiratory gas, via the first gas passage, into the tank. The humidification assembly gas outlet port is configured to introduce the humidified and pressurized respiratory gas, via the second gas passage back into a main body of the respiratory ventilation apparatus. The humidification assembly gas inlet port and the humidification assembly gas outlet port are set on a same side surface of the shell.