Abstract: The present application relates to an LED epitaxial structure and the preparation method and application thereof. The LED epitaxial structure comprises a first multiple-quantum-well light-emitting layer and a second multiple-quantum-well light-emitting layer. The first multiple-quantum-well light-emitting layer comprises a first shoes layer, a first well layer, a first cap layer, and a first Barrier layer epitaxially grown from bottom to top in sequence. The second multiple-quantum-well light-emitting layer comprises a second shoes layer, a second well layer, a second cap layer, and a second Barrier layer epitaxially grown from bottom to top in sequence. The technical solutions disclosed in the present application can solve the problem that the 365 nm to 375 nm wave band LED would emit yellow light.

Abstract: Disclosed in the present invention are a series of coumarin compounds and the uses thereof, and particularly disclosed are compounds as shown in formula (I) and pharmaceutically acceptable salts thereof.

Abstract: A class of pyrimidoheterocyclic compounds, and specifically disclosed is a compound represented by formula (III) or a pharmaceutically acceptable salt thereof.

Abstract: A crystal form of a pyrimidine heterocyclic compound and a preparation method therefor. Specifically disclosed are a preparation method for and application of a compound of formula (II) and the crystal form thereof.

Abstract: The present application provides an LED chip based on an alumina-silica composite substrate and a fabrication method thereof. The LED chip comprises an alumina-silica composite PSS substrate, a composite buffer layer and an LED structural layer, wherein the composite buffer layer is epitaxially grown on the alumina-silica composite PSS substrate, and the LED structural layer is epitaxially grown on the composite buffer layer. The composite buffer layer comprises: an aluminium oxynitride/aluminium nitride layer and a silicon oxynitride layer, wherein the alumina in the alumina-silica composite PSS substrate is covered with the aluminium oxynitride/aluminium nitride layer, and the silica in the alumina-silica composite PSS substrate is covered with the aluminium oxynitride/aluminium nitride layer and the silicon oxynitride layer in a staggered manner.

Abstract: The present invention relates to a method for controlling an air conditioning outlet of a vehicle, including: collecting an ambient temperature and a user set temperature; determining a target value according to the ambient temperature and the user set temperature; determining a target working mode from a plurality of preset working modes of an air conditioning outlet according to the target value, the working mode including a preset air outlet direction; and enabling the air conditioning outlet to work in the target working mode.

Abstract: A class of pyrimidoheterocyclic compounds, and specifically disclosed is a compound represented by formula (III) or a pharmaceutically acceptable salt thereof.

Abstract: Disclosed are a series of benzopyrimidine compounds and a use thereof, and specifically disclosed are compounds represented by formula (II) and pharmaceutically acceptable salts thereof.

Abstract: The present application provides an LED epitaxial wafer and a fabrication process thereof, wherein an N-type GaN layer of the LED epitaxial wafer comprises an N_SL layer and an N_Bulk layer. N_SL layer and N_Bulk layer are equivalent to form multiple capacitive structures, and different silicon doping concentrations enhance the current diffusion and enhance the antistatic capability of LED epitaxial wafer. The arrangement of N_SL layer and N_Bulk layer structure reduces the dislocation density of quantum well light-emitting layer and improves the lattice quality of quantum well light-emitting layer. In the manufacturing process of the LED epitaxial wafer provided by the present application, the SiH4 valve unit of the MOCVD device does not need a higher switching frequency, thereby improving the service life of the SiH4 valve unit.

Abstract: A class of pyrimidoheterocyclic compounds, and specifically disclosed is a compound represented by formula (III) or a pharmaceutically acceptable salt thereof.

Abstract: Provided are pyrimidine aromatic ring compounds. Specifically provided is a compound as represented by formula (II) or a pharmaceutically acceptable salt thereof.

Abstract: The present application relates to an LED epitaxial structure and the preparation method and application thereof. The LED epitaxial structure comprises a first multiple-quantum-well light-emitting layer and a second multiple-quantum-well light-emitting layer. The first multiple-quantum-well light-emitting layer comprises a first shoes layer, a first well layer, a first cap layer, and a first Barrier layer epitaxially grown from bottom to top in sequence. The second multiple-quantum-well light-emitting layer comprises a second shoes layer, a second well layer, a second cap layer, and a second Barrier layer epitaxially grown from bottom to top in sequence. The technical solutions disclosed in the present application can solve the problem that the 365 nm to 375 nm wave band LED would emit yellow light.

Abstract: A controllable downhole drilling and completion tool separating device and their method of use are provided. The device includes an upper mandrel connector, an outer sleeve, a claw clamp sleeve, a claw clamp locking ring, a mandrel sleeve, a lower connector, a piston ring and a pressure bearing ball. The upper end of the lower connector is on the outer side of the upper connector in a sleeving mode. A first annular cavity is between the lower connector and the upper connector. The piston ring is on the outer side of the upper connector in a sleeving mode and located in the first annular cavity. The claw clamp sleeve and the outer sleeve are sequentially arranged on the outer side of the upper connector in a sleeving mode. A second annular cavity is communicated with the first annular cavity and formed between the claw clamp sleeve and the upper connector.

Abstract: Provided are a series of 5,6-dihydrothieno[3,4-h]quinazoline compounds as represented by formula (P) and pharmaceutically acceptable salts thereof, and the use of the compounds or pharmaceutically acceptable salts thereof in the preparation of solid tumor drugs, such as solid tumor drugs associated with selective PLK1 inhibitors.

Abstract: A class of pyrimidoheterocyclic compounds, and specifically disclosed is a compound represented by formula (III) or a pharmaceutically acceptable salt thereof.

Abstract: A pyrrolopyridine compound and an application thereof. Specifically disclosed is a compound represented by formula (P) or a pharmaceutically acceptable salt thereof.

Abstract: A controllable downhole drilling and completion tool separating device and their method of use are provided. The device includes an upper mandrel connector, an outer sleeve, a claw clamp sleeve, a claw clamp locking ring, a mandrel sleeve, a lower connector, a piston ring and a pressure bearing ball. The upper end of the lower connector is on the outer side of the upper connector in a sleeving mode. A first annular cavity is between the lower connector and the upper connector. The piston ring is on the outer side of the upper connector in a sleeving mode and located in the first annular cavity. The claw clamp sleeve and the outer sleeve are sequentially arranged on the outer side of the upper connector in a sleeving mode. A second annular cavity is communicated with the first annular cavity and formed between the claw clamp sleeve and the upper connector.

Abstract: A class of pyrimidoheterocyclic compounds, and specifically disclosed is a compound represented by formula (III) or a pharmaceutically acceptable salt thereof.

Abstract: A method and an apparatus for sharing a delivery box are provided. The method may include: receiving item sending-receiving information indicating delivering using a delivery box, where the item sending-receiving information includes target address information used to indicate a start fixed position of using the delivery box to carry the item; determining a matching piece from a preset set of pieces of delivery box information, where the position information and the usage status information in the matching piece meet the preset matching condition, and the matching piece includes the position information, the first identification information and the usage status information used to represent whether the delivery box indicated by the corresponding first identification information is occupied; and updating the usage status information in the matching piece to the information representing that the delivery box is occupied.

Abstract: Provided are a main control system and a device for a nuclear magnetic resonance logging while drilling tool, the system includes: a digital signal processor, an auxiliary measurement module, a pulse signal generation module and a memory disposed in a downhole drilling tool; wherein the digital signal processor is communicatively connected to an upper computer arranged on the ground, the auxiliary measurement module and the pulse signal generation module respectively; the memory is communicatively connected to the pulse signal generation module. The main control system and a device for a nuclear magnetic resonance logging while drilling tool achieve the effect of improving the accuracy of the logging data.