Abstract: The invention relates to a hydraulic system, method, and integrated valve block for a slewing mechanism, comprising a first and second cylinder. The rod cavity of the first cylinder connects to the rodless cavity of the second cylinder through the first oil circuit, first hydraulic control check valve, and fourth oil circuit. The rodless cavity of the first cylinder connects to the rod cavity of the second cylinder through the second oil circuit, second hydraulic control check valve, and third oil circuit. The first oil circuit is connected to the directional valve through the sixth oil circuit, and the second oil circuit is connected to the directional valve through the fifth oil circuit. The directional valve is connected to the hydraulic pump and oil tank. The first hydraulic control check valve is installed between the first and fourth oil circuits, and the second hydraulic control check valve is between the second and third oil circuits.

Abstract: A crack self-healing functionally gradient material for ceramic cutting tools and a preparation method thereof. The material for ceramic cutting tools has a symmetrical gradient structure, and based on the percentage by mass, components of each layer include 50%-80% of Ti(C7,N3), 25%-5% of (W7,Ti3)C and 20%-0% of TiSi2; contents of components of layers that are symmetrical relative to a central layer are the same and a thickness is symmetrically distributed; a content of Ti(C7,N3) gradually increases from the surface layer to the central layer, contents of (W7,Ti3)C and TiSi2 gradually decrease by 5% from the surface layer to the central layer, and the contents of Ni and Mo gradually increase from the surface layer to the central layer.

Abstract: Embodiments of this application provide an electronic device and an electronic device assembly. The electronic device includes at least a casing and an antenna assembly. At least one outer side wall of the casing is provided with a first groove that is configured to connect at least the electronic device and an external component, a first receiving cavity is further provided inside the casing, at least a part of a radiating element of the antenna assembly is located in the first receiving cavity, and a projection of the first receiving cavity in a thickness direction of the electronic device at least partially overlaps with a projection of the first groove in the thickness direction of the electronic device. In this way, a size of the electronic device can be reduced, so that the entire electronic device is small. This can improve wearing experience of a user.

Abstract: A milling machine fly-cutter with adjustable cutting-tool geometric angle and milling machine includes a fly-cutter plate body, a plurality of combination grooves are evenly set in the circumferential direction of the fly-cutter plate body, and adjusting assemblies are mounted in the combination grooves. Wherein, the adjusting assemblies include an adjusting block for rake angle and relief angle, an adjusting block for tool cutting edge angle and minor cutting edge angle, an adjusting block for tool cutting edge inclination angle. A first side of the adjusting block is attached with a cutter handle, and a second side is connected with the adjusting block for rake angle and relief angle by the adjusting block for tool cutting edge angle and minor cutting edge angle. The milling machine fly-cutter realizes adjustment of the geometric angles of cutting tool, and is able to adapt to cutter handles of a variety of different specifications.

Abstract: A method for prepring a porous aerogel scaffold includes: adding a photoinitiator and polyethylene glycol diacrylate in a buffer solution, dissolving by heating and evenly mixing, adding Pluronic F127 into the mixed solution, and standing at a low temperature to obtain an aerogel scaffold material; printing a hydrogel scaffold by using a 3D printing technology, and performing UV irradiation so that a cross-linking of the hydrogel scaffold is caused to form a three-dimensional scaffold with a stable structure, performing low-temperature soaking to remove Pluronic F127, and then freeze drying the three-dimensional scaffold to obtain the porous aerogel scaffold. Wherein, Pluronic F127 serves as a sacrificial material which is removed after the 3D printing of the hydrogel scaffold is completed, and then a porous structure can be formed in the scaffold in combination with a freeze drying technology, which facilitates the survival, growth and proliferation of cells during the three-dimensional culture.

Abstract: The present invention relates to the field of new materials technology, in particular to carbon nitride composite ceramic tool materials, preparation method and cutting tools thereof. The raw materials comprise carbon nitride, titanium carbonitride, molybdenum, nickel and cobalt, carbon nitride as the matrix phase, titanium carbonitride as the reinforcing phase are added to the carbon nitride based composite ceramic materials, with molybdenum, nickel and cobalt as a suitable sintering aid, dense composite tool material is obtained with vacuum hot press sintering method. The prepared carbon nitride based composite ceramic tool materials boast the advantages of low cost, high hardness, high bending strength and high fracture toughness, which is an important way to promote the innovation, development and popularization of carbon nitride materials.

Abstract: A compound of Formula (1) is provided that has been shown to be useful for treating a disease caused by a viral infection: wherein R1, R2, R3, A, L, m, n, p and q are as defined herein.

Abstract: A method of rapid constructing human cerebral cortical organoids by 3D bioprinting and an application including preparing microfluidic chips, preparation of hydrogel of human cerebral cortical organoids, and printing of human cerebral cortical organoids. The microfluidic chip comprises a mixed-flow channel layer, liquid pool layer, microporous array layer, human cerebral cortical organoid culture layer, and culture medium recovery layer; the human cerebral cortical organoid hydrogel has gelatin, alginate, and hyaluronic acid; printing directly human cerebral cortical organoids in microfluidic chips by FRESH printing method, obtaining human cerebral cortical organoid chips after packaging. The application directly constructs large-scale human cerebral cortex-like with three layers of mutually connected structures in situ in organ chip through 3D bioprinting, simulates cerebrospinal fluid circulation through perfusion culture.

Abstract: A method for preparing a shell-bionic ceramic tool and a shell-bionic ceramic tool, wherein the shell-bionic ceramic tool includes alternating stacks of ceramic powders with different components, pressing a ceramic green body using a cold briquetting method, carrying out pre-pressing once using a graphite indenter on a working surface thereof after each layer of the ceramic powder being loaded, and pressing a last layer using a graphite rod, and then pressing a whole ceramic green body with a certain pressure to promote a bonding of the layers of ceramic powder, which in turn gives a complex shape to an interface between the layers, increases a bonding area between the layers, and plays the role of hindering crack expansion, extending the crack expansion path, and improving the bonding strength of the interface; after then, hot-pressed sintering is used to densify the ceramic green body to obtain the shell-bionic ceramic tool.

Abstract: A stretchable display module and a control method and a detection method thereof are provided. The stretchable display module includes a display panel, a magnetic field generator and a feedback regulation unit. The display panel includes a stretchable closed loop circuit. The magnetic field generator generates a normal phase magnetic field. The feedback regulation unit acquires an induced electromotive force, generated by the stretchable closed loop circuit in the magnetic field, in real time in a stretching process of the stretchable display module, and regulates a stretch state of the stretchable display module according to a magnitude of the induced electromotive force.

Abstract: A photocurable composite hydrogel matrix precursor, a preparation method thereof and a scaffold with same. The photocurable composite hydrogel matrix precursor includes gelatin methacrylate, sodium alginate, sodium carboxymethyl cellulose and chondroitin sulfate, where the mass ratio of a photoinitiator to the gelatin methacrylate to the sodium alginate to the sodium carboxymethyl cellulose to the chondroitin sulfate is (0.2-0.3):(8-10):(1-3):(0.6-0.8):(0.05-0.07).

Abstract: A compound of Formula (I) is provided that has been shown to be useful for treating a disease caused by a viral infection: (I) wherein R1, R2, R3, A, L, m, n, p and q are as defined herein.

Abstract: A BTA drilling quick-stop device (QSD) and a method, wherein the BTA drilling QSD includes a base. The base includes a hollow cavity. A side portion of the base has an opening communicating with the hollow cavity. The opening is closed by a through cover. A horizontally movable fixture is disposed in the hollow cavity. A stopper is disposed at a top portion of the base. A bottom portion of the stopper is disposed lower than a top portion of the fixture to stop the fixture from moving during processing. An elastic element is disposed between the through cover and a side portion of the fixture to push the fixture to move after processing.

Abstract: A method for preparing a shell-bionic ceramic tool and a shell-bionic ceramic tool, wherein the shell-bionic ceramic tool includes alternating stacks of ceramic powders with different components, pressing a ceramic green body using a cold briquetting method, carrying out pre-pressing once using a graphite indenter on a working surface thereof after each layer of the ceramic powder being loaded, and pressing a last layer using a graphite rod, and then pressing a whole ceramic green body with a certain pressure to promote a bonding of the layers of ceramic powder, which in turn gives a complex shape to an interface between the layers, increases a bonding area between the layers, and plays the role of hindering crack expansion, extending the crack expansion path, and improving the bonding strength of the interface; after then, hot-pressed sintering is used to densify the ceramic green body to obtain the shell-bionic ceramic tool.

Abstract: A hydrogel for cell-laden bioprinting, bioink, and a preparation method and an application thereof, relates to the technical field of biomedical polymer hydrogels. The hydrogel for cell-laden bioprinting is polymer gel formed by adding a cell-specific material into a matrix of alginate and gelatin and crosslinking and curing, wherein the cell-specific material is polypeptide selected according to different laden cells. The structures printed using the hydrogel may have the advantages such as adjustable mechanical properties, adjustable porosity, high biocompatibility, high printing accuracy, and high customizability, which may widely support the printing of human tissues and organs such as spinal cord, cartilage, and heart, and has good prospects for applications in tissue repair, organ transplantation and so on.

Abstract: The present invention provides a high-crystallinity barium titanate film structure, a method of preparation and an application thereof, and relates to the field of materials and devices. The method includes the steps of depositing, on a substrate, a barium titanate layer with a (001) or (111) crystal orientation by atomic layer deposition in a high vacuum environment and at a low temperature of 450° C. or below, wherein a Ba/Ti ratio in the barium titanate layer is 0.9-1.5; and performing plasma annealing treatment on the barium titanate layer at a low temperature of 450° C. or below without breaking vacuum to form a high-crystallinity barium titanate layer having the (001) or (111) crystal orientation. The film structure may further comprise top and bottom electrodes formed above and below the barium titanate layer. The present invention solves the problem that an existing method for obtaining a crystalline BTO film is not applicable to back-end of line (BEOL) integration processes.

Abstract: An alumina-based ceramic tool material with low thermal expansion and a preparation process thereof, accordingly, the ceramic tool material may have both the high hardness of alumina ceramics after the hot pressing sintering, and reduces the thermal expansion coefficient of the overall ceramic material by adding the Sc2W3O12 as the negative thermal expansion phase, which improves the thermal shock resistance of ceramic tools in high-speed cutting engineering and meets the requirements of large temperature range during the machining of nickel-based superalloys. Moreover, the composite material does not use metal binder and has strong thermal stability even in the high-speed machining under extreme heat-force-chemistry coupling, so it has a high machining compatibility for nickel-based superalloys.

Abstract: A stretchable display module and a control method and a detection method thereof are provided. The stretchable display module includes a display panel, a magnetic field generator and a feedback regulation unit. The display panel includes a stretchable closed loop circuit. The magnetic field generator generates a normal phase magnetic field. The feedback regulation unit acquires an induced electromotive force, generated by the stretchable closed loop circuit in the magnetic field, in real time in a stretching process of the stretchable display module, and regulates a stretch state of the stretchable display module according to a magnitude of the induced electromotive force.

Abstract: An exposure machine and an exposure method are provided in some embodiments of the present disclosure. The exposure machine includes: a detection module, configured to detect whether there are attachments on the surface of a reticle; a cleaning device, configured to clean the attachments on the surface of the reticle; and an exposure module, configured to expose the reticle having no attachments detected.