Abstract: A method for correcting physical properties of laumontite-rich clastic rock reservoirs based on overburden pressure porosity and permeability tests includes: conducting porosity and permeability tests on rock samples under normal temperature and pressure conditions; analyzing a type of a reservoir cement and characteristics of a reservoir space; comparing variations in the porosity and permeability between a laumontite-containing reservoir and a laumontite-free reservoir under overburden pressure conditions; fitting a variation function to establish relations between porosity, permeability, and overburden pressure in the laumontite-containing reservoir; and creating a correction plate of the permeability of the reservoirs with different laumontite contents.

Abstract: Genetically modified microorganisms enabling the simple, rapid production and purification of thermostable polymerases are described. Methods of rapid purification of a thermostable polymerase are described including the steps of autoinducible expression achieving high titers of soluble protein; autolysis of cells post harvest, autohydrolysis of host nucleotides through expression of a thermolabile endonuclease; and heat denaturation and precipitation of contaminating proteins. Polymerases are obtained with >95% purity, and are readily usable in standard PCR.

Abstract: Apparatuses, systems, and techniques for bounding area planning using a congestion prediction model. Placement data associated with cells of an IC design is identified. A graph based on the identified placement data is generated. The graph is provided as input to a machine learning model. The machine learning model is trained to predict, based on a given graph associated with cells according to a respective IC design, a congestion level for cells at one or more bounding areas of a respective IC design. Outputs of the machine learning model are obtained. The outputs include congestion data indicating a congestion level for a first bounding area of the IC design. Cells are designated for installation at a region, of the IC design, corresponding to the first bounding area.

Abstract: A titanium dioxide micro-nanocontainers, corrosion-resistant waterborne epoxy coatings and preparation method thereof, including preparation steps as follows: TiO2 micro-nano spheres are synthesized by applying hydrothermal method; a polyaniline layer doped with molybdate ions is deposited on the surface of TiO2 micro-nano spheres by adopting the method of in-situ chemical polymerization, TiO2/PANI-MoO42? micro-nano-spheres are obtained, then, polydopamine is encapsulated on the surface of TiO2/PANI-MoO42? micro-nano spheres to obtain titanium dioxide micro-nanocontainers; next, antirust filler, defoamer, dispersant and thickener are added into waterborne epoxy emulsion, then titanium dioxide micro-nanocontainers are added in the waterborne epoxy emulsion for dispersing and grinding, filtering and encapsulating to obtain component A; the waterborne epoxy curing agent and deionized water are mixed in proportion to obtain component B; component A is stirred, then it is mixed with the component B in proportion,

Abstract: A titanium dioxide micro-nanocontainers, corrosion-resistant waterborne epoxy coatings and preparation method thereof, including preparation steps as follows: TiO2 micro-nano spheres are synthesized by applying hydrothermal method; a polyaniline layer doped with molybdate ions is deposited on the surface of TiO2 micro-nano spheres by adopting the method of in-situ chemical polymerization, TiO2/PANI-MoO42? micro-nano-spheres are obtained, then, polydopamine is encapsulated on the surface of TiO2/PANI-MoO42? micro-nano spheres to obtain titanium dioxide micro-nanocontainers; next, antirust filler, defoamer, dispersant and thickener are added into waterborne epoxy emulsion, then titanium dioxide micro-nanocontainers are added in the waterborne epoxy emulsion for dispersing and grinding, filtering and encapsulating to obtain component A; the waterborne epoxy curing agent and deionized water are mixed in proportion to obtain component B; component A is stirred, then it is mixed with the component B in proportion,

Abstract: This invention provides a preparation method of solid self-lubricating material with high temperature resistance, including steps described as follows: first, mixing polymer matrix resin and nano lubricating filler to compose a uniform raw material powders; then, placing the raw material powders in the cavity of hot-press die; keeping the temperature for 90-120 min at the first prepressing temperature, controlling the hot-pressing pressure under the third pre-loading pressure, and gradually increasing the temperature to the solid-phase molding temperature of the material; gradually reducing the temperature to the first preloading temperature after the solid-phase molding is completed; next, removing the pressure, finally, obtaining the solid self-lubricating material by naturally cooling to normal temperature and demoulding.

Abstract: A titanium dioxide micro-nanocontainers, corrosion-resistant waterborne epoxy coatings and preparation method thereof, including preparation steps as follows: TiO2 micro-nano spheres are synthesized by applying hydrothermal method; a polyaniline layer doped with molybdate ions is deposited on the surface of TiO2 micro-nano spheres by adopting the method of in-situ chemical polymerization, TiO2/PANI-MoO42? micro-nano-spheres are obtained, then, polydopamine is encapsulated on the surface of TiO2/PANI-MoO42? micro-nano spheres to obtain titanium dioxide micro-nanocontainers; next, antirust filler, defoamer, dispersant and thickener are added into waterborne epoxy emulsion, then titanium dioxide micro-nanocontainers are added in the waterborne epoxy emulsion for dispersing and grinding, filtering and encapsulating to obtain component A; the waterborne epoxy curing agent and deionized water are mixed in proportion to obtain component B; component A is stirred, then it is mixed with the component B in proportion,

Abstract: The embodiments of the present disclosure disclose a method and an apparatus for crystal growth. The method for crystal growth may include: placing a seed crystal and a target source material in a growth chamber of an apparatus for crystal growth; executing a growth of a crystal based on the seed crystal and the target source material according to physical vapor transport; determining whether a preset condition is satisfied during the crystal growth process; and in response to determining that the preset condition is satisfied, replacing a sublimated target source material with a candidate source material. In the present disclosure, by replacing the sublimated target source material with the candidate source material, a crystal with large-size and high-quality can be grown.

Abstract: A card edge connector includes an insulative housing and two rows of terminals. The insulative housing includes two side walls. The terminals include signal terminals and grounding terminals each having a retaining portion, a contact portion, and a soldering portion. Two adjacent terminals in each row constitutes a terminal pair. The soldering portions of each terminal pair are aligned with each other in a longitudinal direction and the soldering portions of an adjacent terminal pair are deviate from each other in the longitudinal direction so that the soldering portions of the two rows of the terminals are arranged in four rows. The terminal pairs include three types of arrangement and in each arrangement the soldering portions of the ground terminals are placed next to the soldering portions of the signal terminals in the closest way in order to reduce interference during transmission.

Abstract: A method for preparing an aluminum carbon composite by using a foam aluminum includes the following steps. Electromagnetic stirring and drying are performed on the foam aluminum and a carbon material to obtain a foam aluminum preform; an aluminum block is melted into aluminum liquid, the aluminum liquid is adjusted to qualified aluminum liquid, the qualified aluminum liquid is cooled to a temperature of 620˜650° C. and keeping the temperature to make the qualified liquid aluminum become a semi-solid state, then the foam aluminum preform is pressed into the qualified liquid aluminum and performing electromagnetic stirring. A mold is heated to a certain temperature and extrusion molding is performed to obtain a carbon reinforced aluminum matrix composite material. The method overcomes a problem that the carbon material and the aluminum matrix have poor wettability and are not easy to be added into the aluminum matrix.

Abstract: A method for preparing an aluminum carbon composite by using a foam aluminum includes the following steps. Electromagnetic stirring and drying are performed on the foam aluminum and a carbon material to obtain a foam aluminum preform; an aluminum block is melted into aluminum liquid, the aluminum liquid is adjusted to qualified aluminum liquid, the qualified aluminum liquid is cooled to a temperature of 620˜650° C. and keeping the temperature to make the qualified liquid aluminum become a semi-solid state, then the foam aluminum preform is pressed into the qualified liquid aluminum and performing electromagnetic stirring. A mold is heated to a certain temperature and extrusion molding is performed to obtain a carbon reinforced aluminum matrix composite material. The method overcomes a problem that the carbon material and the aluminum matrix have poor wettability and are not easy to be added into the aluminum matrix.

Abstract: A VLSI placement optimization framework receives a cell connectivity representation and cell characteristics and uses self-supervised graph clustering to optimize cell cluster assignments for power, performance, and area (PPA). The framework provides cell clustering constraints as placement guidance to commercial placers. Specifically, graph learning techniques are used to formulate the PPA metrics as machine learning loss functions that can be minimized directly through gradient descent. The framework improves the PPA metrics at the placement stage and the improvements endure to the post-route stage.

Abstract: An electrical connector includes: an insulating housing having a mating face, a card slot recessed from the mating face with a floor face facing the mating face, and two side walls located at opposite sides of the card slot; and two terminal modules retained in the insulating housing, each terminal module including a row of terminals, a conductive plastic, and an insulating plastic, the row of terminals including plural signal terminals and plural grounding terminals, wherein the grounding terminals are partially retained in the conductive plastic and the insulating plastic surrounds and retains the signal terminals and the conductive plastic, thereby forming the terminal module.

Abstract: An electrical connector includes: an insulating housing defining a mating face, a card slot, and two side walls at opposite sides of the card slot, each of the side walls defining signal passageways and grounding passageways; two rows of terminals located on the side walls and each row of terminal including signal terminals in the signal passageways and grounding terminals in the grounding passageways, the terminals including retaining portions retained in the passageways and elastic arms with contacting portions extending into the card slot; and a one-piece inserting member assembled in the insulating housing, wherein the inserting member defines plural first inserting portions inserted in the signal passageways and plural second inserting portions inserted in the grounding passageways, the second inserting portions contact corresponding grounding terminals, respectively, to establish a grounding path.

Abstract: Self-supervised machine learning is applied to combinational gate sizing based on an input circuit netlist. A transformer neural network architecture is disclosed to select gate sizes along paths of the network between primary inputs/outputs and/or sequential logic elements. The gate size selections may be optimized along dimensions such as path delay, path power consumption, and path circuit area.

Abstract: A graphene reinforced aluminum matrix composite with high electrical conductivity and a preparation method thereof. The method includes: obtaining aluminum coated graphene powder by plating aluminum on a graphene surface, melting aluminum block into aluminum liquid, heating a mold to be lower than an aluminum melting point, alternately pouring the aluminum liquid and the aluminum coated graphene powder into the mold for layered casting to obtain a sandwich structure; extruding the sandwich structure into a rectangular test block and then heating to 500˜600° C., performing heat preservation for a preset time and performing forging treatment, and performing longitudinal cold deformation under inert gas to obtain the graphene reinforced aluminum matrix composite. The method can solve a problem that poor wettability of graphene and aluminum matrix, the graphene is evenly dispersed in the aluminum matrix, which can improve strength of the aluminum matrix and keep its high electrical conductivity.

Abstract: Provided are an air spring upper support, a vehicle air spring assembly, and a vehicle. The air spring upper support is used for a vehicle air spring. The air spring upper support is configured to be of a split structure having an upper housing and a lower housing, the upper housing and the lower housing are connected to each other and form a receiving space, the air spring upper support further has a bushing, and the bushing is arranged in the receiving space.

Abstract: A method for improving lubricating performance of lubricating oils is provided and includes: adding copper phosphate with a porous structure into a base oil, a mass percent of the copper phosphate with the porous structure to the base oil is 0.0001% ˜50%, the porous structure is one of a foam porous structure and a porous nanoflower structure. The copper phosphate with the porous structure is obtained by adding a divalent copper salt solution into an alkaline disodium hydrogen phosphate solution or alkaline phosphoric acid buffer solution and then separating a precipitate. When a ratio of a concentration of a divalent copper ion to that of a phosphate ion is 1:0.1 to 400, the porous structure is porous foam or nanoflower. The porous structure can be well dispersed in the lubricating oil for 1 hour. After adding the lubricating oil, excellent friction reduction and anti-wear is achieved.