Abstract: Low molecular weight heparin (LMWH) suitable for equivalent use to USP enoxaparin sodium is prepared from a starting material isolated from engineered E. coli K5 capsular polysaccharide, e.g., E. coli K5 heparosan. The E. Coli CPS is treated with acids to remove 3-deoxy-D-manno oct-2-ulosonic acid (Kdo) residues, and further hydrolyzed via alkali treatment to form low molecular weight N-sulfo, N-acetyl heparosan (LMW-NSNAH) having molecular weight and N-acetylation comparable to enoxaparin. The LMW-NSNAH is converted to LMWH via a series of enzymatic modifications by C5-epimerase, 2-O-, 6-O-, and 3-O-sulfotransferases. Compositions including the LMWH are prepared without the use of porcine-derived heparin, and thus benefit from better source material availability, better control of manufacturing processes, reduced concerns about contamination, adulteration or animal virus, or impurities. Further, the LMWH product is demonstrated to be structurally and functionally comparable traditional pharmaceutical LMWHs.

Abstract: A copper die-bonding material for third-generation semiconductor device packaging. The bond is made from an oxidation-resistant copper paste engineered to minimize oxidation and optimize copper sintering density. As a result, dense bonds with high shear strength are formed. The oxidation-resistant copper paste includes copper metal particles and copper nanoparticles, wherein the copper nanoparticles are specifically engineered to have bimodal size distribution. The present invention provides a one-pot composition, which is directly applicable to a metallic substrate to initiate an oxidation-free sintering process, while providing enhanced shear strength and bond strength.

Abstract: An end plate comprises: a first plate, comprising a first connecting part, wherein the first connecting part is arranged in a closed ring along the circumferential edge of the first plate and is configured to form continuous sealing connection with an environment component; and a second plate, stacked with the first plate in a first direction, wherein the second plate comprises second connecting parts spaced along the circumferential edge of the second plate. The first connecting part of the first plate is in continuous sealing connection with the environment component and is used for sealing the position where the end plate and the environment component are connected, and the second connecting parts of the second plate are connected to the environment component respectively by means of connecting members and is used for improving the strength of connection between the end plate and the environment component.

Abstract: A pressure distribution monitoring flexible planar mat system with a wide pressure measuring range. The flexible planar mat includes a first electrode layer and a first composite piezoelectric-dielectric layer with a second composite piezoelectric-dielectric layer facing the first layer and a second electrode layer. Each of the first and second composite piezoelectric-dielectric layers includes an elastomeric matrix with conductive and dielectric particles embedded therein. The relative size of the conductive particles and the dielectric particles creates a micro-rough interface between these layers and the electrode layers resulting in a range of contact areas, permitting detection between 0 and 3000 kPa. The flexible planar mat system further includes a data collector that collects a pressure signal from the mat. A pressure distribution data processor receives and calculates data from the data collector and creates a two-dimensional pressure map from the flexible planar mat.

Abstract: A method for creating a male sterile and maintainer dual-purpose line by knocking out a BnOPR3 gene in Brassica napus, belongs to the technical field of plant genetic engineering. Use of two Brassica napus homologous genes of the BnOPR3 gene in controlling male reproductive development of Brassica napus is provided, where a BnOPR3.A3 gene has a nucleotide sequence set forth in SEQ ID NO: 1, and a protein encoded by same has a sequence set forth in SEQ ID NO: 2; and a BnOPR3.C3 gene has a nucleotide sequence set forth in SEQ ID NO: 3, and a protein encoded by same has a sequence set forth in SEQ ID NO: 4. A method for creating a male sterile and a maintainer dual-purpose line using a BnOPR3 gene in Brassica napus is further provided.

Abstract: The present invention discloses a shape memory polymer and resin composition thereof. The shape memory polymer comprising a polymer blend of a polyvinyl chloride and a polyurethane, the polyurethane being prepared from a reaction mixture consisting essentially of: (A) at least one diisocyanate compound; and (B) a long chain polyol; wherein the polyvinyl chloride is configured to be the hard segment that preserves the original shape, and the polyurethane is configured to be the soft segment that forms the temporary shape.

Abstract: A self-densifying interconnection is formed between a high-temperature semiconductor device selected from a GaN or SiC-based device and a substrate. The interconnection includes a matrix of micron-sized silver particles in an amount from approximately 10 to 60 weight percent; the micron-sized silver particles having a particle size ranging from approximately 0.1 microns to 15 microns. Bonding particles are used to chemically bind the matrix of micron-sized silver particles. The bonding particles are core silver nanoparticles with in-situ formed surface silver nanoparticles chemically bound to the surface of the core silver nanoparticles and, at the same time, chemically bound to the matrix of micron-sized silver particles. The bonding particles have a core particle size ranging from approximately 10 to approximately 100 nanometers while the in-situ formed surface silver nanoparticles have a particle size of approximately 3-9 nanometers.

Abstract: A lithium-ion battery is provided, including a cathode with one or more nickel-rich ternary cathode materials, specifically LiNixMnyCozO2 or LiNixAlyCozO2, where x, y, and z sum to 1 and x is at least 0.8. The battery also includes an anode made from materials such as silicon, silicon oxide, carbon nanotubes, lithium metal, graphene, and graphite, and features a porous polymer separator with a porosity of 30% to 90%. An electrolyte is also included. A key aspect is the use of a gel-free binder, which is a modified polyvinylidene fluoride (PVDF) grafted with monomers containing at least one unsaturated carbon-carbon double bond and functional groups. This modification prevents defluorination and crosslinking of the PVDF when in contact with the nickel-rich cathode materials.

Abstract: An end plate comprises: a first plate, comprising a first connecting part, wherein the first connecting part is arranged in a closed ring along the circumferential edge of the first plate and is configured to form continuous sealing connection with an environment component; and a second plate, stacked with the first plate in a first direction, wherein the second plate comprises second connecting parts spaced along the circumferential edge of the second plate. The first connecting part of the first plate is in continuous sealing connection with the environment component and is used for sealing the position where the end plate and the environment component are connected, and the second connecting parts of the second plate are connected to the environment component respectively by means of connecting members and is used for improving the strength of connection between the end plate and the environment component.

Abstract: The present invention relates to waterborne coating formulations with polyhedral oligomeric silsesquioxane for hard coating application. The coating composition includes a functionalized polymeric hard coating material, at least one co-polymerizable reactive diluent, a photo initiator or a thermal initiator, and one or more additives. The coating composition can be applied on polycarbonate (PC) film, polyethylene terephthalate (PET) film and paper by conventional coating techniques. The waterborne hard coating features a pencil hardness of more than 4H on PC and PET. The coating developed by internal and external emulsification of POSS which is used as a protective topcoat for various substrates. The resulting coating with high transparency and excellent anti-scratch resistance.

Abstract: The present disclosure relates to a corrosion-resistant Sn—Ag—Cu series lead-free solder alloy, belonging to the technical field of soldering material. The present disclosure provides a Sn—Ag—Cu series lead-free solder alloy and a preparation method thereof, wherein the Sn—Ag—Cu series lead-free solder alloy includes, by mass percentage, 2.7-3.3% of Ag, 0.4-0.6% of Cu, 1.5-3.0% of Bi, 0.2-2.0% of Sb, 0.01-0.5% of Zr, and the balance of Sn. The Sn—Ag—Cu series lead-free solder alloy prepared by the preparation method of the present disclosure has properties such as low melting point, high tensile strength, and excellent corrosion resistance. It can be used under harsh conditions and has a wide range of applications.

Abstract: A method for training a speech recognition model, includes: constructing an initial speech recognition model including a first network having a first initial parameter and a second network having a second initial parameter; fixing the second initial parameter, calculating a contrastive learning loss function, and performing self-supervised training on the first network according to the contrastive learning loss function to adjust the first initial parameter to a first intermediate parameter; fixing the first intermediate parameter, calculating a first joint loss function, and performing training on the second network according to the first joint loss function to adjust the second initial parameter to a second intermediate parameter; and calculating a second joint loss function, and performing training an the first network and the second network according to the second joint loss function to adjust the first intermediate parameter and the second intermediate parameter to obtain a target speech recognition mode

Abstract: A dual mode conductive hydrogel-based strain sensor is provided, which includes both ion conductive mechanism and electron conductive fillers. The hydrogel-based strain sensor includes a hydrogel layer with a first cross-linked hydrogel-forming polymer network and a second cross-linked hydrogel-forming polymer network. The second cross-linked hydrogel-forming polymer network interpenetrates into the first hydrogel-forming polymer network without cross-linking between the two networks. A water-based liquid is entrained by the first and second crosslinked hydrogel-forming polymer networks in an amount of approximately 50-75 wt % of the hydrogel. The water including an ionically-conducting salt in an amount of 5-25 wt % of the formed hydrogel. Conductive fillers include two or more of graphene, carbon nanotubes, and MXene. Stretchable conductive electrodes formed on the hydrogel layer and are selected from conductive particle-filled elastomers, stretchable metal meshes, and stretchable conductive fabrics.

Abstract: The present invention provides a lithium metal battery having a lithium metal electrode including a cathode, an anode, a separator positioned between the cathode and the anode, an electrolyte, and a lithium metal negative electrode. The lithium metal negative electrode includes a lithium reactive metal layer, the lithium reactive metal layer being formed on a support conductive layer. A dendrite-suppressing coating is formed over the lithium reactive metal layer; the dendrite-suppressing coating is a displacement-reacted metal including silver reacted from decomposition of a silver salt and having an interface reaction product formed from a reaction between the silver salt and the lithium reactive metal layer. The interface reaction product is positioned between the displacement-reacted metal layer and the lithium reactive metal layer. The dendrite suppressing coating permits lithium metal ions to permeate the coating to react electrolytically in an overall battery reaction.

Abstract: A plate assembly includes a first plate, a second plate, and a support body. The first plate is provided with a cavity and a reinforcing portion, and the reinforcing portion is located in the cavity. At least one end of the first plate is provided with a slot with an opening facing outside the cavity, and the slot is located in a space enclosed by an inner wall of the cavity. The support body is inserted into the slot. The second plate is located on a side of the support body far away from the first plate, and is connected to the first plate.

Abstract: The present invention relates to a high-voltage lithium metal battery, characterized by its non-flammability due to the high flash point and high thermal stability of its specifically designed electrolyte, thereby ensuring its safe operation. In particular, the battery comprises an electrolyte with lithium salts and a novel diether compound with asymmetrical fluorination, developed based on electrolyte molecular design, synthesis and thermophysical properties characterization. The electrolyte with the asymmetrically fluorinated diether compound exhibits high thermal stability through high boiling point and high flash point, while also having a high working voltage, allowing high energy density designs and simultaneously optimizing operation safety by minimizing flammability and flash risks.

Abstract: A pressure distribution monitoring flexible planar mat system with a wide pressure measuring range. The flexible planar mat includes a first electrode layer and a first composite piezoelectric-dielectric layer with a second composite piezoelectric-dielectric layer facing the first layer and a second electrode layer. Each of the first and second composite piezoelectric-dielectric layers includes an elastomeric matrix with conductive and dielectric particles embedded therein. The relative size of the conductive particles and the dielectric particles creates a micro-rough interface between these layers and the electrode layers resulting in a range of contact areas, permitting detection between 0 and 3000 kPa. The flexible planar mat system further includes a data collector that collects a pressure signal from the mat. A pressure distribution data processor receives and calculates data from the data collector and creates a two-dimensional pressure map from the flexible planar mat.

Abstract: The present disclosure relates to a corrosion-resistant Sn—Ag—Cu series lead-free solder alloy, belonging to the technical field of soldering material. The present disclosure provides a Sn—Ag—Cu series lead-free solder alloy and a preparation method thereof, wherein the Sn—Ag—Cu series lead-free solder alloy includes, by mass percentage, 2.7-3.3% of Ag, 0.4-0.6% of Cu, 1.5-3.0% of Bi, 0.2-2.0% of Sb, 0.01-0.5% of Zr, and the balance of Sn. The Sn—Ag—Cu series lead-free solder alloy prepared by the preparation method of the present disclosure has properties such as low melting point, high tensile strength, and excellent corrosion resistance. It can be used under harsh conditions and has a wide range of applications.

Abstract: A debris collection component, a debris collection assembly, a battery case packaging structure and a battery case packaging method are described. The debris collection component is configured to be arranged between two adjacent workpieces stacked in a direction of gravity. The debris collection component comprises a collection tray and a retaining member. The collection tray is configured to receive debris falling from the workpiece above. The retaining member is arranged on the collection tray and configured to retain the debris. The debris collection component can collect the debris falling from the workpiece above so as to reduce the amount of the debris attached to the workpiece, and reduce the impact of the debris on the subsequent assembly process of the workpiece and the safety performance during the use of the workpiece.

Abstract: A welding fixture and a welding device, which fall within the technical field of battery production are disclosed. The welding fixture comprises a base, a frame positioning mechanism and a negative pressure suction mechanism, the base comprising a placement region in which a frame is placed, the frame positioning mechanism being arranged on the base and configured to position the frame, and the negative pressure suction mechanism being arranged in the placement region and configured to generate negative pressure to suck a covering member so as to press the covering member against the frame. The welding fixture according to the present application can reduce the risk of damage to the covering member, increase the yield of cases, and reduce the production cost.