Abstract: An infrared vision positioning method for concrete pumping liquid level in tube of steel tubular arch bridge is provided. In this method, the perspective geometry algorithm is used to construct the pose transformation matrix to obtain the relative pose between the camera and the arch bridge steel pipe, the image is transformed into orthography by perspective transformation, and the real coordinates of the liquid level in the infrared image can be directly solved by the scale, so as to realize the accurate positioning of the liquid level; the proposed method is simple in structure and can realize real-time operation, which greatly improves the calculation efficiency of coordinates in infrared images, compared with the conventional knocking method, the advantage is that it does not require staff in an overhead operating, and the feedback of the liquid level position can be faster and more efficient.

Abstract: A display substrate and a manufacturing method therefor, a display panel and a display device. The display substrate includes: a base substrate; and an organic layer located at a side of the base substrate and including a planarization layer and a plurality of support structures. The planarization layer includes a group of vias, the support structures are disposed on a side of the planarization layer away from the base substrate and integrated with the planarization layer. Orthographic projections of the support structures on the base substrate do not overlap with orthographic projections of the vias on the base substrate.

Abstract: A foldable display device includes a first housing (100), a second housing (200), a third housing (300), a first hinge (400), a second hinge (500), and a flexible display (600), where two opposite ends of the first hinge (400) are respectively connected to the first housing (100) and the second housing (200), two opposite ends of the second hinge (500) are respectively connected to the second housing (200) and the third housing (300), and the flexible display (600) is separately connected to the first housing (100), the second housing (200), and the third housing (300). The first hinge (400) is capable of deforming for folding or unfolding of the first housing (100) relative to the second housing (200), and the second hinge (500) is capable of deforming for folding or unfolding of the second housing (200) relative to the third housing (300).

Abstract: A display module and an electronic device are provided. A first folding mechanism is configured to unfold or fold a first housing and a second housing relative to each other. The display module includes a display, a support member, and a first stiffening plate. The display includes a first bending portion, a first non-bending portion, and a second non-bending portion. The first non-bending portion is fastened to the first housing, and the second non-bending portion is fastened to the second housing. The support member is provided with first through holes or first grooves. The support member is fastened to a non-display side of the display. The first through holes or the first grooves are provided opposite to the first bending portion.

Abstract: A system and a method of tracking an input sign for an extended reality are provided, wherein the method including: obtaining an image; detecting for a handheld device and a hand in the image; in response to a first bounding box of the hand and a second bounding box of the handheld device being detected, detecting at least one joint of the hand from the image; performing a data fusion of the first bounding box and the second bounding box according to the at least one joint to obtain the input sign; and outputting a command corresponding to the input sign via the output device.

Abstract: A novel surfactant composition that comprises of two surfactant components, a solvent, and water. The surfactant composition is added to a fracturing fluid, which is then pumped downhole into a subterranean formation where the novel characteristics of the fracturing fluid lend to improved oil production over the fracturing fluid without the surfactant composition.

Abstract: Disclosed herein is a crosslinked HPG fluid system using a very low concentration of HPG polymer. The fluid system is able to be used at low HPG concentrations while maintaining stable viscosity for over two hours at elevated temperatures.

Abstract: The rotation shaft structure includes a main shaft assembly, and two folding assemblies that are symmetrically disposed with respect to the main shaft assembly. The two folding assemblies may rotate toward or against each other relative to the main shaft assembly. When the folding assembly is specifically disposed, the folding assembly includes a rotation assembly, a support plate, and a housing mounting bracket. The rotation assembly is rotationally connected to the main shaft assembly. The support plate is rotationally connected to the housing mounting bracket and slidably connected to the rotation assembly.

Abstract: A display substrate includes a base substrate, first electrodes arranged in an array on the base substrate, a first signal line, a second signal line crosswise arranged with the first signal line, and a pattern layer arranged at a same layer and made of a same material as the first electrode. An orthographic projection of the pattern layer on the base substrate does not overlap an orthographic projection of the first signal lines on the base substrate. The first electrode comprises a first strip electrode. An extension direction of the first strip electrode is intersected with a row direction and a column direction.

Abstract: A waterproof and shockproof structure of a fan module includes a shell, a waterproof rubber sealing ring and a connector module. The shell includes an opening and a flange. The flange is disposed in the opening, the waterproof rubber sealing ring is also disposed in the opening, and the connector module is installed in the waterproof rubber sealing ring, and is movably installed in the opening of the shell. The waterproof rubber sealing ring includes a first abutting portion, a first surrounding portion and a second abutting portion. The first surrounding portion is connected to the first abutting portion, the second abutting portion is connected to the first surrounding portion, and the first abutting portion, the first surrounding portion and the second abutting portion cover three surfaces of the flange of the shell.

Abstract: Provided are a gas separation membrane, and a preparation method therefor and the use thereof. The gas separation membrane comprises 60-100 mol % of a monomeric unit derived from ?,?,?-trifluorostyrene, and has an intrinsic viscosity of 0.5-5.0 dL/g and a tensile strength of at least 50 MPa. According to the GB/T 1038-2000 test method test, the permeability coefficient of hydrogen is at least 100 barrer.

Abstract: A foldable display device includes a first frame, a second frame, a rotating shaft assembly, a flexible heat sink and a flexible circuit board. The flexible heat sink and the flexible circuit board passes through the rotating shaft assembly, and the rotating shaft assembly includes a shaft seat, a door plate, a first support plate, and a second support plate. Two opposite ends of the flexible heat sink are connected to the first frame and the second frame, and two opposite ends of a part of the flexible heat sink in the rotating shaft assembly are respectively fastened to a first fastening surface that is of the first support plate and that faces the shaft seat and a second fastening surface that is of the second support plate and that faces the shaft seat.

Abstract: Provided are methods and compositions for in situ detection of RNA in cells that does not require either the use of reverse transcriptase nor use of droplets. The methods can comprise annealing, in fixed and permeabilized cells, a pair of polynucleotide probes to adjacent sequences in a target RNA, which are subsequently ligated. A cell-specific barcode sequence can be subsequently synthesized in the cell using split-pool rounds to add barcode sequences to the ligated probe pair sequences in the cells, wherein an effect of multiple rounds of the split pooling is that ligated probe pair sequences in different cells have unique barcodes that are cell-specific.

Abstract: The present disclosure provides a display substrate, a manufacturing method of the display substrate and a display apparatus. The display substrate includes a base substrate; an alignment layer, on the base substrate; a first electrode, located between the base substrate and the alignment layer and being in contact with the alignment layer; and a pattern layer, located between the base substrate and the alignment layer and being in contact with the alignment layer. An orthographic projection of the pattern layer on the base substrate does not overlap an orthographic projection of the first electrode on the base substrate, and a ratio of a contact angle of the pattern layer to a contact angle of the first electrode is greater than or equal to 7/12 and less than 3/2.