Abstract: An artificial heart valve includes a stent, a leaflet assembly, an inner skirt, and an outer skirt. The stent includes an inflow end, an outflow end, and stent holes. The outer skirt includes a closing part, a free part, and a connecting part. The closing part is close to the inflow end and connects to the inner skirt. The free part is connected to the closing part and extends away from the inflow end. The connecting part connects to a portion of the free part close to the outflow end and connects to the stent and/or the inner skirt at the same time. Backflow blood can flow through the stent holes located between the outflow end and an inflow edge of the leaflet assembly and flows into the free part. The free part can swell away from the stent under pressure of the backflow blood to abut against surrounding tissues.

Abstract: An inflatable active packer includes: an inner steel pile; and a sleeve coaxially disposed outside the inner steel pile. The inner diameter of the sleeve is larger than the outer diameter of the inner steel pile. The length of the sleeve is less than or equal to the length of the inner steel pile. The sleeve includes an inner wall, and one end of the inner wall is provided with a guide lug. A strengthened clamping layer is attached to the inner wall of the sleeve. A rubber capsule is fixedly disposed in the middle of the strengthened clamping layer; two ends of the strengthened clamping layer are fixedly connected to the sleeve through a compression member. A mounting hole is disposed in the middle of the strengthened clamping layer. The sleeve includes a through hole coaxially with the mounting hole.

Abstract: Disclosed are a calibration device for non-contact photographic hole measurement and a calibration method for non-contact photographic hole measurement. The device includes a base, an installation platform, a calibration assembly and an illumination compensator. The installation platform is provided at the base, and the calibration assembly is provided at the installation platform. In a calibration process, the base drives the installation platform to rotate around a Z axis, thereby driving the calibration assembly to rotate around the Z axis. At the same time, the installation platform drives the calibration assembly to rotate around an X axis. The illumination compensator is configured to fill light for a camera during a photography process.

Abstract: An electroplated part, which contains hardly any organic residues and has a uniform electroplated layer. An electroplating method for preparing the electroplated part is also provided. By controlling the ratio of the length of the motion trajectory of the electroplated part relative to an anode during the electroplating process to the width of the anode, and adding auxiliary cathodes to the electroplated part, the electroplating method improves the uniformity of the thickness of the electroplated layer at various positions of the electroplated part. A fixture for implementing the electroplating method and an electroplating apparatus are provided. The electroplated layer of the electroplated part prepared by the electroplating method has relatively uniform thickness and a high coverage rate, problems such as burn and fracture have hardly occurred during the electroplating process of the electroplated part, the yield of electroplated parts is high, and the scrap rate is low.

Abstract: A medical device polishing member and a manufacturing method thereof. The medical device polishing member has a mass loss rate of 20-60% in the polishing process, and has good mechanical properties, surface properties, and biosafety. Further provided is a manufacturing method for the medical device polishing member, and the manufacturing method has the advantages such as high polishing precision, simple and convenient operation, and low costs.

Abstract: A covered stent and a preparation method thereof. The covered stent includes an inner-layer membrane, an outer-layer membrane, and a supporting framework located between the inner-layer membrane and the outer-layer membrane. The areas of the inner-layer membrane and the outer-layer membrane in supporting framework grids are mutually bonded. No extra adhesive is introduced into the covered stent, subsequent heating and melting are not needed to bond the inner-layer membrane and the outer-layer membrane of the supporting framework, and the covered stent has the advantages of being thin in membrane, small in pressing and holding outer diameter, high in bonding strength of the inner-layer membrane and the outer-layer membrane, good in mechanical property of the membranes and the like.

Abstract: A motor controller includes a housing, a power circuit board, and a control circuit board. The housing includes a first mounting platform, a second mounting platform, and a side wall. There is a height difference between the first mounting platform and the second mounting platform. The first mounting platform is disposed on an upper part of the side wall, and the second mounting platform is disposed on a middle part of the side wall. The second mounting platform is disposed on one side of the first mounting platform. The first mounting platform and the side wall form an upper chamber, and the control circuit board and the power circuit board are disposed in the upper chamber. The control circuit board is closer to the first mounting platform than the power circuit board. The second mounting platform and the side wall form a lower chamber communicating with the upper chamber.

Abstract: Disclosed are a calibration device for non-contact photographic hole measurement and a calibration method for non-contact photographic hole measurement. The device includes a base, an installation platform, a calibration assembly and an illumination compensator. The installation platform is provided at the base, and the calibration assembly is provided at the installation platform. In a calibration process, the base drives the installation platform to rotate around a Z axis, thereby driving the calibration assembly to rotate around the Z axis. At the same time, the installation platform drives the calibration assembly to rotate around an X axis. The illumination compensator is configured to fill light for a camera during a photography process.

Abstract: An inflatable active packer includes: an inner steel pile; and a sleeve coaxially disposed outside the inner steel pile. The inner diameter of the sleeve is larger than the outer diameter of the inner steel pile. The length of the sleeve is less than or equal to the length of the inner steel pile. The sleeve includes an inner wall, and one end of the inner wall is provided with a guide lug. A strengthened clamping layer is attached to the inner wall of the sleeve. A rubber capsule is fixedly disposed in the middle of the strengthened clamping layer; two ends of the strengthened clamping layer are fixedly connected to the sleeve through a compression member. A mounting hole is disposed in the middle of the strengthened clamping layer. The sleeve includes a through hole coaxially with the mounting hole.

Abstract: A method for preparing a rubber for an elastomer of a flexible joint, includes: weighing hydrogenated nitrile raw rubber, a silica reinforcing agent, aramid fiber pulp, carbon black, liquid nitrile rubber, zinc oxide, stearic acid, an antioxidant, and a peroxide crosslinking agent; plasticating the hydrogenated nitrile raw rubber in a first internal mixer at 125-135° C., collecting a resulting product and cooling, to yield a plasticized rubber; preheating the liquid nitrile rubber; adding the plasticized rubber to a second internal mixer, further adding the aramid fiber pulp, the zinc oxide, the stearic acid, and the antioxidant to the second internal mixer for first mixing; adding the carbon black to the second internal mixer for second mixing; adding the silica reinforcing agent and the preheated liquid nitrile rubber to the second internal mixer for third mixing; and collecting a discharged product when a temperature of the second internal mixer is 140° C.

Abstract: An absorbable implantable medical device made of iron-based alloy, including a base made of iron-based alloy and a complex, wherein the complex includes a complexing agent. In a physiological solution, the base made of iron-based alloy can react with the complexing agent to generate a water-soluble iron complex having solubility in the physiological solution of no less than 10 mg/L. A corrosion product generated after the absorbable implantable medical device made of iron-based alloy is implanted in a human body can be quickly metabolized/absorbed by the body.

Abstract: An absorbable implantable medical device made of iron-based alloy, including a base made of iron-based alloy and a complex, wherein the complex includes a complexing agent. In a physiological solution, the base made of iron-based alloy can react with the complexing agent to generate a water-soluble iron complex having solubility in the physiological solution of no less than 10 mg/L. A corrosion product generated after the absorbable implantable medical device made of iron-based alloy is implanted in a human body can be quickly metabolized/absorbed by the body.

Abstract: A motor controller includes a housing, a power circuit board, and a control circuit board. The housing includes a first mounting platform, a second mounting platform, and a side wall. There is a height difference between the first mounting platform and the second mounting platform. The first mounting platform is disposed on an upper part of the side wall, and the second mounting platform is disposed on a middle part of the side wall. The second mounting platform is disposed on one side of the first mounting platform. The first mounting platform and the side wall form an upper chamber, and the control circuit board and the power circuit board are disposed in the upper chamber. The control circuit board is closer to the first mounting platform than the power circuit board. The second mounting platform and the side wall form a lower chamber communicating with the upper chamber.

Abstract: An absorbable iron-based alloy implantable medical device includes an iron-based alloy matrix, a degradable polymer coating disposed on the surface of the iron-based alloy matrix, and a corrosion inhibition layer disposed on the surface of the iron-based alloy matrix. The corrosion inhibition layer can delay early-stage corrosion of the iron-based alloy matrix, ensure mechanical performance of a medical device in the early stage of the implantation, prevent degradation of a polymer in the early stage of the implantation of the medical device, and reduce the usage of the degradable polymer, thereby reducing risks of inflammatory reactions.

Abstract: The present invention provides a free-cut warp-knitted elastic fabric and a method for production thereof. The method uses a first guide bar and a second guide bar of a tricot warp knitting machine for knitting, wherein a non-elastic yarn passes across a guide needle of the first guide bar and forms the surface of the fabric by knitting via two needles in a 1×1 warp plain stitch loop mode, and an elastic yarn passes across a guide needle of the second guide bar and forms the inside of the fabric by knitting with the aforementioned non-elastic yarn in the same direction via two needles in a 1×1 double warp plain stitch loop mode. Finally the fabric which has good resilience, can be arbitrarily cut, and has low raveling property, good elasticity and high snagging level is obtained.

Abstract: An absorbable implantable medical device made of iron-based alloy, including a base made of iron-based alloy and a complex, wherein the complex includes a complexing agent. In a physiological solution, the base made of iron-based alloy can react with the complexing agent to generate a water-soluble iron complex having solubility in the physiological solution of no less than 10 mg/L. A corrosion product generated after the absorbable implantable medical device made of iron-based alloy is implanted in a human body can be quickly metabolized/absorbed by the body.

Abstract: An absorbable iron-based alloy implantable medical device includes an iron-based alloy matrix, a degradable polymer coating disposed on the surface of the iron-based alloy matrix, and a corrosion inhibition layer disposed on the surface of the iron-based alloy matrix. The corrosion inhibition layer can delay early-stage corrosion of the iron-based alloy matrix, ensure mechanical performance of a medical device in the early stage of the implantation, prevent degradation of a polymer in the early stage of the implantation of the medical device, and reduce the usage of the degradable polymer, thereby reducing risks of inflammatory reactions.

Abstract: Disclosed is an inter-platform information sharing system, including an interface module, a control module and a database, wherein the interface module is configured to receive information obtained through a first platform and acquire the information from the database and synchronize the acquired information with the counterpart on a second platform, or receive information obtained through the second platform and acquire the information from the database and synchronize the acquired information with the counterpart on the first platform, and the control module is configured to control the interface module to receive the information and acquire the information from the database, and control the database to store the obtained information. In addition, an inter-platform information sharing method, a server and a computer storage medium are also provided.