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.

Abstract: Methods for CRISPR Enabled DNA Synthesis and compositions arising from the methods are provided. The methods may include ligation of partially single stranded DNA donor and acceptor oligonucleotides that are covalently linked to a subsequence of the target DNA to be sequenced followed by cleavage of the ligated product. In this manner the donor and acceptor oligonucleotides shuttle a growing subsequence of the target DNA with each cycle. A mutant Cpfl nuclease is missing non-specific ssDNA nuclease activity may be used for cleavage of the ligation product. Fourteen ligation/cleavage cycles can result in synthesis of ssDNA of greater than 10,000 bp in length.

Abstract: The disclosure relates to an air spring for a vehicle and a vehicle. The disclosure aims to solve the problems of, in an existing air spring for a vehicle, a poor filtering effect and frequent replacement of a filter screen.

Abstract: The disclosure provides nucleic acidvectors containing a high expression promoter, such as a high expression, supporting cell-specific promoter, operably linked to a polynucleotide encoding Atoh1. Such vectors and compositions containing the same can be used to induce robust regeneration of mature hair cells (e.g., cochlear and/or vestibular hair cell regeneration). Accordingly, the nucleic acid vectors and compositions described herein can be used to treat subjects having or at risk of developing hearing loss or vestibular dysfunction.

Abstract: Disclosed are a shock absorber and an automobile. The shock absorber includes a shock absorber cylinder and an air spring arranged around the shock absorber cylinder. The air spring includes a damping spring and a piston. A free end of the damping spring is supported at a free end of the piston. A support is disposed between the piston and the shock absorber cylinder. The free end of the piston is supported on the shock absorber cylinder by the support. In the shock absorber according to the invention, the piston and the shock absorber cylinder can be connected in a simple way.

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: The present disclosure relates to a multi-layer film. The multi-layer film may include a first region and a second region. The first region may include a first bonding layer and a first planarization layer directly contacted with each other. The second region includes a second bonding layer, a second planarization layer, and an intervention layer between the second bonding layer and the second planarization layer.

Abstract: The present disclosure provides a method for growing a seed crystal, including: obtaining a plurality of orthohexagonal seed crystals in a hexagonal crystal system by performing a first cutting on a plurality of seed crystals in the hexagonal crystal system to be expanded, respectively; splicing the plurality of orthohexagonal seed crystals in the hexagonal crystal system; obtaining a seed crystal in the hexagonal crystal system to be grown by performing a second cutting on the plurality of spliced orthohexagonal seed crystals in the hexagonal crystal system; obtaining an intermediate seed crystal in the hexagonal crystal system by performing a gap growth on the seed crystal in the hexagonal crystal system to be grown under a first setting condition; and obtaining a target seed crystal in the hexagonal crystal system by performing an epitaxial growth on the intermediate seed crystal in the hexagonal crystal system under a second setting condition.

Abstract: The present disclosure provides a method for preparing a composite crystal, the method is performed in a multi-chamber growth device, and the multi-chamber growth device includes a plurality of chambers. The method includes conveying and processing at least one substrate between a plurality of chambers and obtaining at least one composite crystal by growing a target crystal through vapor deposition in one of the plurality of chambers, the at least one composite crystal including the at least one substrate and the target crystal.

Abstract: Disclosed is a friction-reducing and anti-wear composite material for a wading kinematic pair and a method of preparing the same. The friction-reducing and anti-wear composite material is prepared from carbon fiber (CF) among inorganic fillers, polyimide (PI) and polyether ether ketone (PEEK). These three materials are wet-mixed, dried and placed in a mold followed by curing by a heat press. The cured product is cooled and demolded to obtain the CF/PI/PEEK friction-reducing and anti-wear composite material for a wading kinematic pair. Tribological properties of the PEEK material are enhanced due to synergistic effect arising from hybrid organic-inorganic filling. The friction-reducing and anti-wear composite material provided in the invention has significantly reduced friction coefficient and wear volume loss under the seawater environment.

Abstract: A meshless method for solid mechanics simulation, which includes the following steps: first constructing a trial function and a test function by distributing points according to a geometric shape of a structure; then introducing numerical flux to correct the traditional Galerkin weak form; and finally substituting the trial and test functions into the weak form to construct a global stiffness matrix of the structure and a system of algebraic equations, and solving the system of algebraic equations to obtain displacement and stress of each point, thus completing simulation and analysis of the structure deformation and stress.

Abstract: The present disclosure provides a device for preparing a crystal and a method for growing a crystal. The device may include a growth chamber configured to execute a crystal growth; and a temperature control system configured to heat the growth chamber to cause that a radial temperature difference in the growth chamber does not exceed a first preset range of an average temperature in the growth chamber during the crystal growth. The method may include placing a seed crystal and a source material in a growth chamber to grow a crystal; and controlling a heating component based on information of a temperature sensing component, to cause that a radial temperature difference in the growth chamber does not exceed a first preset range of an average temperature in the growth chamber during a crystal growth.

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.