Abstract: This application relates to the technical field of coal-fired boilers, and provides a method and an apparatus for improving steam oxidation resistance of a small-diameter boiler tube in a coal-fired boiler. The method includes the following steps: cutting a boiler tube panel from a ceiling of the boiler, vertically hoisting and fixing the boiler tube panel, and cutting out a section from a bottom portion of a lower bend of the boiler tube panel; cleaning an inner tube wall of each tube body in the boiler tube panel; performing oxidation resistance coating sintering on the inner tube wall of each tube body in the boiler tube panel; and performing a welding repair on each tube body in a sintered boiler tube panel. All construction processes of this method can be completed in a furnace during shutdown and maintenance, production efficiency is high, and maintenance duration can be significantly reduced.

Abstract: An anti-oxidation dipping treatment method for a graphite sealing element for a thermal power generation unit, and an anti-oxidation production line. The anti-oxidation dipping treatment method for a graphite sealing element for a thermal power generation unit comprises the following steps: S1, placing a graphite sheet into a soaking device for soaking; S2, conveying the soaked graphite sheet into a drying and curing device for drying and curing; S3, stacking the multiple dried and cured graphite sheets together, and subjecting same to compression molding to form a layered graphite body; and S4, stamping the layered graphite body to form a finished graphite sealing element with a desired appearance.

Abstract: This application relates to the technical field of coal-fired boilers, and provides a method and an apparatus for improving steam oxidation resistance of a small-diameter boiler tube in a coal-fired boiler. The method includes the following steps: cutting a boiler tube panel from a ceiling of the boiler, vertically hoisting and fixing the boiler tube panel, and cutting out a section from a bottom portion of a lower bend of the boiler tube panel; cleaning an inner tube wall of each tube body in the boiler tube panel; performing oxidation resistance coating sintering on the inner tube wall of each tube body in the boiler tube panel; and performing a welding repair on each tube body in a sintered boiler tube panel. All construction processes of this method can be completed in a furnace during shutdown and maintenance, production efficiency is high, and maintenance duration can be significantly reduced.

Abstract: A multi-phase buck converter circuit is provided, including a power supply, a plurality of phase buck circuits, each phase buck circuit including an input terminal, an output terminal, and a second input terminal, with input terminals of the plurality coupled to the power supply, a plurality of inductors coupled to the output terminals of the plurality of phase buck circuits, the plurality of inductors providing an output voltage at an output of the multi-phase buck converter circuit, a detection controller coupled to the output terminals of the plurality of phase buck circuits, the detection controller configured to detect a fault in the plurality of phase buck circuits, and a drive circuit coupled to the detection controller and coupled to each second input terminal of the plurality of phase buck circuits. The drive circuit is configured to detect a faulty phase buck circuit and stop driving the faulty phase buck circuit.

Abstract: A structural analog of Cyclotheonellazole A, and a synthetic method therefor and an application method thereof are provided. A compound with a structure of formula (I) and a pharmaceutically acceptable salt thereof are provided. The formula (I) is as follows: R1, R2, R3 and R4 are independently selected form the group consisting of H, a C1-C6 alkyl group, a C1-C6 alkoxy group, a halogen group, a hydroxyl group, an amino group, a nitro group, a cyano group, and a sulfydryl group. Based on the total synthetic route of Cyclotheonellazole A, the classical reverse synthesis analysis is utilized, the structural modification is purposefully carried out, a mother nucleus of the natural product remains unchanged, and the structural analog 1a is obtained by replacing a left side chain with a simple formylamine, thereby confirming the excellent protease inhibitory activity thereof, and having a strong application prospect in the pharmaceutical industry.

Abstract: A synthetic compound of myricetin and nobiletin, and a preparation method therefor are provided, two clinically significant lead compounds of the myricetin and the nobiletin are modified, a new synthetic compound of myricetin and nobiletin is obtained. Compared with traditional western medicine, the new synthetic compound has significant advantages in treating comorbidities and has fewer adverse reactions. The reduction of serum uric acid and creatinine levels by the synthetic compound of myricetin and nobiletin is significantly higher than that of monomers myricetin and monomers nobiletin, which indicates that the synthetic compound of myricetin and nobiletin has a better uric acid lowering effect than monomeric medicines and has a significant improvement effect on hyperuricemia (HUA).

Abstract: Disclosed in the present invention are a magnolol and sulforaphane conjugate, and a preparation method and use thereof. The magnolol and sulforaphane conjugate comprises C25H29NO2S2 (CT-1), C25H29NO4S2(CT-2), and C25H29NO3S2(CT-3). By using the drug combination principle, the present invention achieved the first synthesis of the magnolol and sulforaphane conjugate (CT-1, CT-2, CT-3). According to biological evaluation, the conjugate has an antitumor effect remarkably superior to that of magnolol and sulforaphane, has a broad spectrum of antitumor activity and strong druggability. It is an antitumor compound with development potential, and also provides new ideas and approaches for development of a novel antitumor drug.

Abstract: A CyclotheonellazoleA, a synthesis method therefor, and an application method thereof are provided, and a compound with a structure of formula (I) and a pharmaceutically acceptable salt thereof are provided, the structure of formula (I) is as follows: R1, R2, R3 and R4 are independently selected form the group consisting of a hydrogen group (H), an alkyl group with carbon atoms in a range of 1-6, an alkoxy group with carbon atoms in a range of 1-6, a halogen group, a hydroxyl group, an amino group, a nitro group, a cyano group and a sulfydryl group. A CyclotheonellazoleA natural product is successfully synthesized by a classical retrosynthesis analysis, a stereoscopic structure of the CyclotheonellazoleA natural product is confirmed, extremely excellent protease inhibitory activity of the CyclotheonellazoleA natural product is confirmed by combining a protease inhibition activity experiment, and the CyclotheonellazoleA has a strong application prospect in a pharmaceutical industry.

Abstract: A structural analog of Cyclotheonellazole A, and a synthetic method therefor and an application method thereof are provided. A compound with a structure of formula (I) and a pharmaceutically acceptable salt thereof are provided. The formula (I) is as follows: R1, R2, R3 and R4 are independently selected form the group consisting of H, a C1-C6 alkyl group, a C1-C6 alkoxy group, a halogen group, a hydroxyl group, an amino group, a nitro group, a cyano group, and a sulfydryl group. Based on the total synthetic route of Cyclotheonellazole A, the classical reverse synthesis analysis is utilized, the structural modification is purposefully carried out, a mother nucleus of the natural product remains unchanged, and the structural analog 1a is obtained by replacing a left side chain with a simple formylamine, thereby confirming the excellent protease inhibitory activity thereof, and having a strong application prospect in the pharmaceutical industry.

Abstract: A continuous heating control system and method, and an air-conditioning device. The system includes a defrosting solenoid valve (1) arranged on a bypass pipeline, wherein one end of the bypass pipeline is connected to an oil separator (2), and the other end of the bypass pipeline is connected to an outdoor heat exchanger (3); and a heating structure which is arranged at the bottom of a gas separator (4) and used for heating the gas separator (4).

Abstract: An air conditioning system, comprising an outdoor unit and an indoor heat exchange mechanism. The indoor heat exchange mechanism comprises an air conditioner indoor unit and a first heat exchange mechanism used for at least one among water cooling, water heating and space heating. The present air conditioning system integrates various functions into one, such as air-conditioning refrigeration, air-conditioning heating, producing household cold water, producing household hot water, and home heating by means of connecting indoor units for cooling and heating, a water cooling mechanism, a water heating mechanism and a device for floor heating located indoors to one outdoor unit. Moreover, the system directly utilizes high-temperature refrigerant to heat water for floor heating.

Abstract: A control method, a control device for starting an air conditioner, a storage medium, and an air conditioner are disclosed. The method includes the step of acquiring current temperature variation information of a weather in an environment of the air conditioner and current startup parameters of the air conditioner. The method further includes the step of controlling operation parameters of the air conditioner according to the current temperature variation information and the current startup parameters of the air conditioner.

Abstract: An air conditioning system, including a compressor, two outdoor heat exchange units, a liquid pipe used for communicating with indoor units, a high-pressure gas tube and a low-pressure gas tube; the air conditioning system further includes a valve assembly. One outdoor heat exchange unit has a first state in which one end thereof communicates with the high-pressure gas tube and another end thereof communicates with the liquid pipe, and has a second state in which one end thereof communicates with the low-pressure gas tube and the other end thereof communicates with the liquid pipe. Further disclosed is a control method for the air conditioning system.

Abstract: A preparation method of a novel natural bioactive peptide Tubulysin U includes: dissolving a compound 2 in trifluoroacetic acid, heating under reflux to prepare an intermediate, reacting with a compound 3 and N,N-diisopropylethylamine to obtain a product, reacting the product with 2, 6-dimethylpyridine and tert-butyldimethylsilyl trifluoromethanesulfonate, adding sodium hydroxide after the reaction to prepare an intermediate acid, reacting the intermediate acid with a compound 6, HATU and N,N-diisopropylethylamine to obtain a product, adding triphenylphosphine to prepare an intermediate amine, adding a compound 8 and HATU to react, adding ammonium fluoride to prepare a first intermediate, adding sodium hydroxide to the first intermediate to prepare a second intermediate, adding acetic anhydride to the second intermediate to prepare a third intermediate, adding trifluoroacetic acid to the third intermediate to prepare a fourth intermediate, and adding formaldehyde and sodium cyanoborohydride to the fourth inte

Abstract: A heat pump system and a control method therefor. The heat pump system includes a compressor; an indoor heal exchanger; an outdoor heat exchanger, including a first heat exchange portion and a second heat exchange portion, wherein a flow path switching device is provided between the first heat exchange portion and the second heat exchange portion to disconnect or communicate the first heat exchange portion and the second heat exchange portion; a first four-way valve; and a second four-way valve, configured to enable a high-temperature refrigerant to be input into the first heat exchange portion in a heating mode, so as to enable the heat pump system to operate in a heating and deicing mode.

Abstract: A preparation method of a novel natural bioactive peptide Tubulysin U includes: dissolving a compound 2 in trifluoroacetic acid, heating under reflux to prepare an intermediate, reacting with a compound 3 and N,N-diisopropylethylamine to obtain a product, reacting the product with 2, 6-dimethylpyridine and tert-butyldimethylsilyl trifluoromethanesulfonate, adding sodium hydroxide after the reaction to prepare an intermediate acid, reacting the intermediate acid with a compound 6, HATU and N,N-diisopropylethylamine to obtain a product, adding triphenylphosphine to prepare an intermediate amine, adding a compound 8 and HATU to react, adding ammonium fluoride to prepare a first intermediate, adding sodium hydroxide to the first intermediate to prepare a second intermediate, adding acetic anhydride to the second intermediate to prepare a third intermediate, adding trifluoroacetic acid to the third intermediate to prepare a fourth intermediate, and adding formaldehyde and sodium cyanoborohydride to the fourth inte

Abstract: A continuous heating control system and method, and an air-conditioning device. The system includes a defrosting solenoid valve (1) arranged on a bypass pipeline, wherein one end of the bypass pipeline is connected to an oil separator (2), and the other end of the bypass pipeline is connected to an outdoor heat exchanger (3); and a heating structure which is arranged at the bottom of a gas separator (4) and used for heating the gas separator (4).

Abstract: A robot for atomization and disinfection is provided, which includes a robot body, an aerosol generator arranged outside the robot body for spraying aerosol mist particles into air, an aerosol concentration detector arranged outside the robot body for detecting an aerosol concentration in the air, and a main controller arranged inside the robot body and connected to the aerosol generator and the aerosol concentration detector for controlling a spray volume of the aerosol mist particles in real time according to the aerosol concentration after the aerosol generator sprays aerosol mist particles into the air. The aerosol concentration is dynamically monitored in real time, and the sterilization aerosol is supplemented in real time according to the concentration change, so as to maintain the stability of the concentration of the sterilization aerosol, improve the intelligence of space disinfection for epidemic prevention, and reduce the burden of manual disinfection.

Abstract: An air-conditioner outdoor unit and a control method for a fan (100) of an air-conditioner outdoor unit; the air-conditioner outdoor unit of the present invention comprises a fan (100) and a deflector ring (200) that is sleeved on the outside of a vane (110) of the fan (100); further comprised are a vane stopping device (300), a wind speed measuring device (400), and a control system.

Abstract: An air conditioning system, comprising an outdoor unit (1) and an indoor heat exchange mechanism (2). The indoor heat exchange mechanism (2) comprises an air conditioner indoor unit (21) and a first heat exchange mechanism (3) used for at least one among water cooling, water heating and space heating. The present air conditioning system integrates various functions into one, such as air-conditioning refrigeration, air-conditioning heating, producing household cold water, producing household hot water, and home heating by means of connecting indoor units for cooling and heating, a water cooling mechanism, a water heating mechanism and a device for floor heating located indoors to one outdoor unit, thereby conserving space and facilitating installation. Moreover, the system directly utilizes high-temperature refrigerant to heat water for floor heating, which replaces coal heating and boiler heating, conserves energy and is environmentally friendly to a greater degree, and improves the living environment.