Abstract: A method for detecting a display panel defect, including: collecting a panel image of a to-be-detected display panel, a plurality of first pixels of the display panel corresponding to a plurality of second pixels in the panel image; converting the panel image into a binary image; dilating each bright spot region in the binary image such that adjacent bright spot regions communicate with each other to form at least one closed communication region in the binary image; determining a region of interest mask image in the binary image in accordance with the at least one closed communication region; determining a region of interest in accordance with the region of interest mask image and the panel image; and performing feature identification on the region of interest to determine a defect of the display panel.

Abstract: The present invention, belonging to the technical field of biological imaging, discloses a photo-activatable aggregation-induced emission probe with in-situ generation capability, a preparation method therefor and an application thereof. The preparation method is as follows: A bis(2-(2-hydroxybenzylidene)amino)aryl disulfide compound is reacted with thiol to obtain a photo-activatable aggregation-induced emission probe, which has a structure as shown in formula III. In the present invention, the photo-activatable aggregation-induced emission probe is aggregated into a specific organelle, and a 2-(2-hydroxyphenyl)benzothiazole compound having the aggregation-induced emission property is generated through a photo-oxidation reaction.

Abstract: Provided are methods, compositions, reagents, kits that are useful for detecting a specific nucleic acid region in genome with high efficiency and high sensitivity.

Abstract: A delta-sigma modulation type A/D converter includes: a capacitively coupled amplifier having a sampling capacitor, a feedback capacitor, and an amplifier; a correlated double sampling type first integrator as a first-stage integrator, which is connected to the capacitively coupled amplifier without a switch; a second integrator arranged after the first integrator; a quantizer arranged after the second integrator and quantizing an output of the second integrator; and an D/A converter that D/A-converts an output of the quantizer and feeds back to any one of the capacitively coupled amplifier, the first integrator, and the second integrator.

Abstract: The disclosure belongs to the technical field of organic photoelectric materials, and discloses carbonyl containing organic electroluminescent materials and use thereof in OLED. The carbonyl containing organic electroluminescent materials have a structure of formula I, wherein R1 and R2 are different in Formula I, R1 and R2 are different electron-donating groups of aromatic ring derivatives; R1 is an electron-donating groups of hole transport host materials or electron-donating groups of bipolar transport host materials. The luminescent materials of the present disclosure are organic electroluminescent materials based on derivatives of a host material and a benzoyl group. They have both AIE and delayed fluorescence characteristics with high-efficiency solid-state emission, high exciton utilization, and bipolar features.

Abstract: A reference current source includes first and second semiconductor elements, a conversion resistor, an amplifier, and a current mirror circuit. The first semiconductor element includes a single diode or a single transistor, and the second semiconductor element includes diodes or transistors connected in parallel. The conversion resistor converts forward voltages of the first and second semiconductor elements or a differential voltage between the first and second semiconductor elements into a converted current. The amplifier has first and second input terminals. The first semiconductor element is connected between the first input terminal and a ground, and the second semiconductor element and the conversion resistor is connected between the second input terminal and the ground. The current mirror circuit outputs a reference current corresponding to the converted current. The conversion resistor has a temperature coefficient being on a level with a temperature coefficient of the differential voltage.

Abstract: A propeller transmission system for an aircraft powerplant includes a propeller shaft. One end of the propeller shaft is a power input end, and the other end of the propeller shaft is configured to connect a propeller. The power input end of the propeller shaft is provided with a driven gear, and the driven gear is in transmission connection with an input end of an overload clutch. The propeller transmission system further includes a torsional damper, an output end of the overload clutch is in axial transmission connection with the torsional damper by a flexible disc, and the torsional damper is in transmission connection with the propeller shaft.

Abstract: A transmission system for an aircraft powerplant includes a transmission shaft, where an input end of the transmission shaft is sleeved with a driven gear. One end of the driven gear is axially limited, and the other end of the transmission shaft is configured to connect a rotating member. Furthermore, the other end of the driven gear is in transmission connection with a stop hub, and the stop hub is in transmission connection with an overload clutch. The overload clutch is in transmission connection with the transmission shaft. A disc spring member is interposed between one end of the overload clutch and the stop hub, and the other end of the overload clutch is axially limited. A limit distance is formed between the overload clutch and the stop hub, and a force value of the overload clutch varies with a pressure applied.

Abstract: A transmission system for an aircraft powerplant includes a transmission shaft, where an input end of the transmission shaft is sleeved with a driven gear, one end of the driven gear is axially limited, and the other end of the transmission shaft is configured to connect a rotating member; and the other end of the driven gear is in transmission connection with a stop hub, the stop hub is in transmission connection with an overload clutch, the overload clutch is in transmission connection with the transmission shaft, a disc spring member is interposed between one end of the overload clutch and the stop hub, the other end of the overload clutch is axially limited, a limit distance is formed between the overload clutch and the stop hub, and a force value of the overload clutch varies with a pressure applied.

Abstract: A propeller transmission system for an aircraft powerplant includes a propeller shaft. One end of the propeller shaft is a power input end, and the other end of the propeller shaft is configured to connect a propeller. The power input end of the propeller shaft is provided with a driven gear, and the driven gear is in transmission connection with an input end of an overload clutch. The propeller transmission system further includes a torsional damper, an output end of the overload clutch is in axial transmission connection with the torsional damper by a flexible disc, and the torsional damper is in transmission connection with the propeller shaft.

Abstract: A sorghum cutting header and a sorghum harvester with large feed volume and multiple reeling pans includes a reeling header, a rod crushing device, and a reciprocating cutter device. The rod crushing device is located under the reeling header. The reeling header includes reeling pans, frame rods, bearing seats, reeling pan shafts, tandem shafts, and tandem shaft bearing seats. The reeling pan shafts are installed in parallel on the frame rod through bearing seats. The adjacent reeling pan shafts are in transmission connection, and at least one reeling pan shaft is in transmission connection with the power device. An inner part of any reeling pan shaft penetrates the tandem shafts. Both ends of the tandem shafts are supported on the frame rods, and one end of the tandem shafts is fixed on the tandem shaft bearing seats. The reeling pans are mounted on any reeling pan shaft.

Abstract: The present invention discloses a series of ammonia decomposition catalysts, the method of making such catalysts and the use of such catalysts. The said catalysts are made of composite metal or metal alloys supported on composite oxides or nitrides as the catalyst supports. The catalysts are useful in ammonia decomposition at various temperatures and pressures, including temperatures below 500° C. and pressures up to 30 atm.

Abstract: Disclosed herein is a decontaminant aqueous solution for decontaminating diisocyanate drum, including 20-97 wt % of at least one alcohol or derivative thereof, based on the total weight of decontaminant aqueous solution, and an alkaline source in an amount effective to provide the solution a pH of at least 8. Further disclosed herein is a method for decontaminating diisocyanate residues in an emptied drum with the decontaminant aqueous solution.

Abstract: A delta-sigma modulation type A/D converter includes: a capacitively coupled amplifier having a sampling capacitor, a feedback capacitor, and an amplifier; a correlated double sampling type first integrator as a first-stage integrator, which is connected to the capacitively coupled amplifier without a switch; a second integrator arranged after the first integrator; a quantizer arranged after the second integrator and quantizing an output of the second integrator; and an D/A converter that D/A-converts an output of the quantizer and feeds back to any one of the capacitively coupled amplifier, the first integrator, and the second integrator.

Abstract: Disclosed is a voltage regulator, which makes a low dropout regulator stop working by controlling a sampling circuit of the low dropout regulator to break in a sleep mode, and makes an output voltage of the low dropout regulator follow an output voltage of a first bias voltage generating circuit by using a first MOS transistor connected between an voltage input end and an voltage output end of the low dropout regulator in a source follower structure, and is capable of controlling an output voltage of the whole voltage regulator by a generated bias voltage applied to the first bias voltage generating circuit by a first bias current source.

Abstract: The present invention discloses rice serine hydroxymethyltransferase coded gene OsSHM4 mutants and application thereof. The rice serine hydroxymethyltransferase coded gene mutants are obtained in a manner that T at a 461st position of a CDS sequence region of a wild type rice OsSHM4 gene is mutated to C, so that coded amino acids thereof are mutated from leucine to proline. A CDS sequence of the wild type rice OsSHM4 gene is shown in SEQ ID NO. 1. After mutation of serine hydroxymethyltransferase coded genes OsSHM4, under a field experiment condition, S and Se content of rice shoots is remarkably improved without influencing biomass of rice. After wild type serine hydroxymethyltransferase coded genes OsSHM4 are genetically modified to complement the mutants, S and Se content of shoots of complemented strains is restored to that of wild type rice water planting.

Abstract: The present disclosure relates, in part, to improved methods of making single-stranded DNA (ssDNA) from double-stranded DNA (dsDNA), as well as use of the resulting ssDNA for genome engineering. The disclosure also relates, in part, to improved methods of genetic modification using single stranded DNA binding proteins.

Abstract: A sorghum cutting header and a sorghum harvester with large feed volume and multiple reeling pans includes a reeling header, a rod crushing device, and a reciprocating cutter device. The rod crushing device is located under the reeling header. The reeling header includes reeling pans, frame rods, bearing seats, reeling pan shafts, tandem shafts, and tandem shaft bearing seats. The reeling pan shafts are installed in parallel on the frame rod through bearing seats. The adjacent reeling pan shafts are in transmission connection, and at least one reeling pan shaft is in transmission connection with the power device. An inner part of any reeling pan shaft penetrates the tandem shafts. Both ends of the tandem shafts are supported on the frame rods, and one end of the tandem shafts is fixed on the tandem shaft bearing seats. The reeling pans are mounted on any reeling pan shaft.

Abstract: An assembly quality detection device and a method for a wind screen cleaning system based on streamline pattern, includes a main body of a test bench and a detection system. The main body of the test bench includes a test bench rack and a cleaning centrifugal fan; the inside of the test bench rack is provided with a cleaning space. The detection system includes a smoke generation and transmission device, a two-degree-of-freedom smoke fixed-point release mechanism, a high-speed image acquisition system and a control system. A fixed base is installed on the upper end of the outlet of the cleaning centrifugal fan, a linear moving guide rail device is installed on the fixed base, the linear moving guide rail device is equipped with a moving slider, the moving slider is installed with a rotating mechanism, the rotating mechanism output end is provided with a smoke releasing duct, the smoke releasing duct is communicated with the smoke generation and transmission device.

Abstract: A threshing device with two-way pull wires and adjustable threshing clearance includes a tensioning mechanism, and several grid bars in clearance fit with side plates, wherein the tensioning mechanism is mounted on the several grid bars so that the grid bars can move in radial and tangential directions in the clearance; the tensioning mechanism includes a tangential tensioning device and a radial tensioning device, wherein the radial tensioning device is mounted in the radial direction of any one of the grid bars, so that the grid bars can move in the radial direction in the clearance; the tangential tensioning device is mounted in series in the tangential direction of the grid bars, so that the grid bars can move in the tangential direction in the clearance. Further disclosed is a combined harvester, which includes the threshing device with two-way pull wires and adjustable threshing clearance.