Abstract: A card reader with a protective mechanism includes an upper shell, a lower shell, a protective mechanism and a circuit board assembly. An upper portion of a front end of the upper shell slantwise extends downward and rearward, and then is bent rearward to form an upper extending portion. A lower portion of the front end of the upper shell extends rearward to form a lower extending portion. The upper extending portion is spaced from the lower extending portion to form an inserting passageway between the upper extending portion and the lower extending portion. The lower shell is mounted to a bottom surface of the upper shell. The protective mechanism is disposed between the upper shell and the lower shell. The circuit board assembly is disposed between the upper shell and the lower shell.

Abstract: A card reader with a protective mechanism includes an upper shell, a lower shell disposed to a bottom surface of the upper shell, a protective mechanism and a circuit board assembly disposed between the upper shell and the lower shell. The protective mechanism includes a front cover, a rear cover covered to a rear of the front cover, two rollers disposed along an up-down direction, two springs, two supporting structures and a plurality of sealing structures. The two springs elastically abut between an inner surface of a top wall of the front cover and one roller along a vertical direction. The two supporting structures are mounted around two opposite sides of the one roller, and two opposite sides of the other roller. The plurality of the sealing structures are disposed at two outer surfaces of the two supporting structures.

Abstract: A card reader with a protective mechanism includes an upper shell, a lower shell, a protective mechanism and a circuit board assembly. An upper portion of a front end of the upper shell slantwise extends downward and rearward, and then is bent rearward to form an upper extending portion. A lower portion of the front end of the upper shell extends rearward to form a lower extending portion. The upper extending portion is spaced from the lower extending portion to form an inserting passageway between the upper extending portion and the lower extending portion. The lower shell is mounted to a bottom surface of the upper shell. The protective mechanism is disposed between the upper shell and the lower shell. The circuit board assembly is disposed between the upper shell and the lower shell.

Abstract: An insertion slot connector and a connector assembly. The insertion slot connector includes an insulating body and multiple conductive terminals. The insulating body includes two side walls, a bottom wall and an insertion slot. The insulating body has a mating surface and a mounting surface provided opposite to each other. The insertion slot runs through the mating surface. Each conductive terminal includes a base, an elastic arm extending from the base toward the mating surface and turns back to extend toward the bottom wall, a contact portion provided at a tail end of the elastic arm and a soldering portion. A distance between the insertion slot and the soldering surface of the soldering portion in the insertion direction is not greater than 0.70 mm. The connector assembly includes a circuit board and at least one insertion slot connector and at least one card edge connector alternately mounted thereon.

Abstract: Embodiments implement a prediction-driven, rather than a trial-driven, approach to automatic data placement recommendations for partitioning data across multiple nodes in a database system. The system is configured to extract workload-specific features of a database workload running at a database system and dataset-specific features of a database running on the database system. The workload-specific features characterize utilization of the database workload. The dataset-specific features characterize how data is organized within the database. The system identifies a plurality of candidate keys for determining how to partition data stored in the database across nodes. Based at least in part on the workload-specific features, the dataset specific features, and the plurality of candidate keys, a set of candidate key combinations for partitioning data is generated.

Abstract: This disclosure provides vaccines and compositions based on SARS-COV-2 S protein, and specifically relates to recombinant SARS-COV-2 spike protein (Sprotein) and mRNA and DNA coding thereof. This disclosure also relates to recombinant plasmid comprising DNA sequence encoding recombinant S protein. This disclosure further relates to composition comprising the recombinant S protein and/or mRNA mentioned above, mRNA-carrier particle such as lipid nanoparticle (LNP), and composition such as a vaccine composition.

Abstract: A production line for producing components to a high standard of cleanliness and sealed and protected in that state includes a loading device, a cleaning device, a detecting device, a pasting device, a heat-sealing device, a packing device, and transfer devices of the production line. The production line automatically processes the components for obtaining components with the high cleanliness. By the processes of protective film pasting, heat-sealing, and packing, the components may be further protected from subsequent pollution. A method for producing components with a high cleanliness applied to the production line is also disclosed.

Abstract: A matrix multiplier and an operation method thereof are provided. The matrix multiplier includes a plurality of first input lines, a plurality of second input lines and a computing array. The computing array includes a plurality of multiplication accumulation (MAC) cells. A first MAC cell of the plurality of MAC cells is coupled to a first corresponding input line of the plurality of first input lines and a second corresponding input line of the plurality of second input lines to receive a first input value and a second input value to perform a multiplication accumulation operation. When at least one of the first input value and the second input value is a specified value, the multiplication accumulation operation of the first MAC cell is disabled.