Abstract: An introduction needle includes a needle piercing portion. The needle piercing portion comprises a needle tooth and a substrate; the needle tooth is fixedly disposed on a portion of a first side surface of the substrate; and when the needle tooth pierces into the skin, the remaining portion of the first side surface of the substrate is configured to abut against an outer surface of the skin.

Abstract: An operating rod for a tattoo device includes: a drive mechanism, configured to drive an injection needle of the tattoo device to move; a first rod body, having a receiving cavity and a first fastening portion, wherein the receiving cavity is configured to receive the drive mechanism, and the first fastening portion is configured to fastened with the injection needle; and a second rod body, connected to at least part of the first rod body in a sleeved manner and configured with a second fastening portion, wherein the second fastening portion is configured to connect to the injection needle.

Abstract: An operating rod for a tattoo device includes: a drive mechanism, configured to drive an injection needle of the tattoo device to move; a first rod body, having a receiving cavity and a first fastening portion, wherein the receiving cavity is configured to receive the drive mechanism, and the first fastening portion is configured to fastened with the injection needle; and a second rod body, connected to at least part of the first rod body in a sleeved manner and configured with a second fastening portion, wherein the second fastening portion is configured to connect to the injection needle.

Abstract: An introduction needle includes a needle piercing portion. The needle piercing portion comprises a needle tooth and a substrate; the needle tooth is fixedly disposed on a portion of a first side surface of the substrate; and when the needle tooth pierces into the skin, the remaining portion of the first side surface of the substrate is configured to abut against an outer surface of the skin.

Abstract: A tattoo practice device includes a coloring portion, a connecting portion, and a sleeve. The coloring portion includes at least one coloring rod, and a plurality of coloring rods are arranged in a dot matrix. One end of the connecting portion is connected to the coloring portion, the connecting portion is linked with the coloring portion, and the sleeve is sleeved on a periphery of the connecting portion. When the connecting portion is driven to move in a first direction along a central axis of the sleeve, the coloring rod is driven to be close to a drawing medium and colors the drawing medium. When the connecting portion is driven to move in a second direction opposite to the first direction along the central axis of the sleeve, the coloring rod is driven to move in a direction away from the drawing medium.

Abstract: An introduction needle includes a needle piercing portion. The needle piercing portion comprises a piercing projection, the piercing projection includes a substrate and a needle tooth, the needle tooth is fixedly arranged on a side surface of a side of the substrate, a central axis of the needle tooth is perpendicular to the side surface of the substrate.

Abstract: A tattoo needle includes: a needle piercing portion. The needle piercing portion includes at least one piercing projection, wherein each of the at least one piercing projection comprises at least one substrate and a plurality of needle teeth. The number of the at least one substrate is one, the plurality of needle teeth is arranged on a side surface of the one substrate, the plurality of needle teeth are arranged in a row on the substrate, a central axis of each of the plurality of needle teeth is perpendicular to the side surface of the one substrate; and the one substrate is configured to limit a piercing depth that the plurality of needle teeth pierces into a skin.

Abstract: A tattoo needle includes: a needle piercing portion. The needle piercing portion includes at least one piercing projection, wherein each of the at least one piercing projection comprises at least one substrate and a plurality of needle teeth. The number of the at least one substrate is one, the plurality of needle teeth is arranged on a side surface of the one substrate, the plurality of needle teeth are arranged in a row on the substrate, a central axis of each of the plurality of needle teeth is perpendicular to the side surface of the one substrate; and the one substrate is configured to limit a piercing depth that the plurality of needle teeth pierces into a skin.

Abstract: An introduction needle includes a needle piercing portion. The needle piercing portion comprises a piercing projection, the piercing projection includes a substrate and a needle tooth, the needle tooth is fixedly arranged on a side surface of a side of the substrate, a central axis of the needle tooth is perpendicular to the side surface of the substrate.

Abstract: A novel gene editing system developed based on the gene cas3 in the type I-B CRISPR-Cas system in the chromosome of Streptomyces virginiae IBL14 enables the gene editing of a type I CRISPR-Cas system on biological cell genomes for the first time. In the system, Cas3 can specifically cleave a DNA fragment of interest guided by crRNA or t-DNA. The new approach can be applied to rapid, simple and correct genome editing of prokaryotic and eukaryotic cells, which provides novel supplements and selections for the commercialized gene editing system developed based on Cas9 in type II.

Abstract: A novel gene editing system developed based on the gene cas3 in the type I-B CRISPR-Cas system in the chromosome of Streptomyces virginiae IBL14 enables the gene editing of a type I CRISPR-Cas system on biological cell genomes for the first time. In the system, Cas3 can specifically cleave a DNA fragment of interest guided by crRNA or t-DNA. The new approach can be applied to rapid, simple and correct genome editing of prokaryotic and eukaryotic cells, which provides novel supplements and selections for the commercialized gene editing system developed based on Cas9 in type H.

Abstract: A pipelined processor including a combinational logic of several stages, a voltage regulator, a counter, a comparator, and a plurality of stage registers. Each stage register is disposed between two adjacent stages of the combinational logic. The stage register includes a flip-flop, a latch, an XOR gate, and a MUX module. When the high level of a register clock is coming, the flip-flop latches first data at the rising edge, and the latch receives second data during the high level. The data latched by the flip-flop and the latch respectively are compared by the XOR gate. If they are same, the output Error of the XOR gate is low level, and the output of the flip-flop is delivered to the next stage. Otherwise, the output Error of the XOR gate is high level, and the output of the latch is delivered to the next stage.

Abstract: A pipelined processor including a combinational logic of several stages, a voltage regulator, a counter, a comparator, and a plurality of stage registers. Each stage register is disposed between two adjacent stages of the combinational logic. The stage register includes a flip-flop, a latch, an XOR gate, and a MUX module. When the high level of a register clock is coming, the flip-flop latches first data at the rising edge, and the latch receives second data during the high level. The data latched by the flip-flop and the latch respectively are compared by the XOR gate. If they are same, the output Error of the XOR gate is low level, and the output of the flip-flop is delivered to the next stage. Otherwise, the output Error of the XOR gate is high level, and the output of the latch is delivered to the next stage.