10results about How to "Reduce rejection" patented technology

The invention provides a face recognition model training method and device, computer equipment, a storage medium and a computer program product. The method comprises the following steps: acquiring a plurality of face image samples, and inputting each face image sample into a pre-trained teacher model and a to-be-trained student model to obtain teacher features, student features and prediction categories of each face image sample; determining feature distribution loss information based on the teacher features and the student features of each face image sample, and determining feature classification loss information based on the student features and the prediction categories of each face image sample; total loss information is determined based on the feature distribution loss information and the feature classification loss information; and based on the total loss information, training a to-be-trained student model until a preset training condition is met, and obtaining a final student model as a face recognition model. By adopting the method, the recognition accuracy of the face recognition model can be effectively improved on the premise of considering efficiency and computing resources.

This invention provides a formulation and preparation method for an exosome-based skin medication. Taking the preparation of a 100g finished formulation as an example, it consists of active ingredients, a nanogel carrier, a composite stabilizer, a moisturizer, a pH adjuster, a preservative, and deionized water. By constructing a nanogel sustained-release system adapted to exosomes and a composite protection mechanism, the exosomes are stably and slowly released and efficiently absorbed on the skin surface within 7 days. This solves the problems of rapid release, low utilization rate, poor stability, and frequent reapplication required for exosome-based skin medications, thereby improving the skin care and treatment effects of exosomes.

An ion wind-assisted electrostatic printing nozzle structure and method for micro / nano structures on insulating substrate surfaces includes an electrostatic printing nozzle, with an ion wind generating module coaxially connected to the outer side of the nozzle. The inlet at the top of the nozzle is connected to a driving air pressure source, and the nozzle at the bottom is connected to a high-voltage power supply. The ion wind generating module has a built-in ionization electrode that generates positive and negative ions upon applying a high voltage. These ions are then driven by airflow to form an ion wind, which is focused on the printing area below the nozzle, keeping the insulating substrate surface in a near-zero potential state, thus forming a virtual grounding electrode. This invention utilizes ion wind to construct a virtual grounding electrode on the insulating surface, solving the problem of unstable electric field during printing caused by variations in printing height and charge accumulation on the insulating surface, thereby improving the applicability of electrostatic printing to insulating substrates.

The utility model relates to medical supplies technical field discloses a big mesh hole hernia repair patch, including a plurality of medical textile monofilament, a plurality of antibacterial fiber and a plurality of flow fiber, a plurality of medical textile monofilament and a plurality of flow fiber are respectively perpendicular to each other interlaced weaving arrangement, a plurality of antibacterial fiber is respectively arranged in the clearance of a plurality of parallelly arranged flow fiber, the side wall of a plurality of flow fiber is respectively surrounded and is opened a plurality of drainage holes. The utility model provides a plurality of medical textile monofilament, a plurality of antibacterial fiber and a plurality of flow fiber are arranged mutually, and the interval is set to 3mm, can improve the mesh size of patch, does not influence the fibrous tissue production of affected part simultaneously can reduce the rejection phenomenon, and antibacterial fiber has excellent biocompatibility, can be absorbed and metabolized by human body part, contains amino in its molecular structure, makes it have antibacterial activity, can improve the antibacterial effect of patch, prevents the situation of infection.

The application relates to the technical field of biomaterials, in particular to a silk fibroin-based biomaterial containing growth factors for injection and a preparation method. The silk fibroin and sodium hyaluronate are cross-linked, the gel is freeze-dried to ensure the stability of the product, the SF-HA freeze-dried powder is compounded with cross-linked sodium hyaluronate as a dispersion medium to form a composite gel particle system, the composite gel is sterilized, and then is blended with growth factors to obtain the silk fibroin-based biomaterial, in which the silk fibroin particles are wrapped by the hyaluronic acid cross-linked lattices. The silk fibroin-based biomaterial is prepared, the degradation period of the product is prolonged, and meanwhile, the uniformity, biocompatibility and active ingredient reservation of the material are considered.

The invention discloses an automatic telescopic child stomach tube device capable of preventing abdominal distension and regurgitation under noninvasive ventilation. The device is used for preventing abdominal distension of a child patient under noninvasive ventilation. A nasal gastrointestinal tube head, a controller, an automatic breathing machine airflow blocker, a stomach tube body and a supporting strip form a whole, the automatic breathing machine airflow blocker is fixed to the upper middle portion of the stomach tube, in the process of using the stomach tube, medical workers place the stomach tube with the automatic breathing machine airflow blocker into the stomach through the esophagus of a child patient, and the stomach tube with the automatic breathing machine airflow blocker is fixed to the upper middle portion of the stomach tube. After the controller is pressed down, the airflow blocker of the automatic breathing machine fills the gap between the stomach tube and the esophagus, the situation that airflow enters the stomach through the esophagus to cause abdominal distension of a child patient in the application process of the non-invasive breathing machine is avoided, meanwhile, the influence of gastric regurgitation on the child patient is prevented, and therefore the situation that feeding of the child patient is affected by non-invasive ventilation is prevented.

The application discloses an implant assembly and a preparation method thereof, relates to the technical field of stomatology, and discloses the implant assembly, which comprises a wear-resistant base and an anti-infection coating. The raw material components of the wear-resistant base comprise a matrix powder, an antibacterial powder and a wear-resistant additive. The anti-infection coating is arranged on at least part of the surface of the wear-resistant base, and the raw material components of the anti-infection coating comprise an organic matrix, a metallized porphyrin and an extracellular vesicle. The implant assembly provided by the application can effectively improve the success rate of implant surgery of a tooth patient, meets the long-term use requirement of the implant in an oral environment, and the raw materials used in the application are low in price, the preparation method is simple, and the application is easy to popularize.

The invention discloses an interface bonding composition as well as a preparation method and application thereof, and relates to the technical field of biomedical materials. The interface bonding composition includes: (1) a calcium salt; (2) a solvent; (3) at least one phosphoric acid compound selected from the group consisting of adenosine phosphate, bisphosphonate, free phosphoric acid hydroxyl group-containing compounds, phosphoric acid amino acid compounds, triphosphoric acid and polyphosphoric acid compounds; and (4) a reaction enhancer. The interface bonding composition provided by the invention can be quickly bonded after being smeared to a bone fracture surface interface, the components of the interface bonding composition are similar to those of bone tissues, and the interface bonding composition can be gradually degraded and promote bone repair while providing initial bonding and mechanical support. The material is high in biological safety and degradable, the degradation period exceeds six months, immediate and lasting fixation of a fracture part can be achieved, and the material is particularly suitable for splicing and repairing crushed bones in comminuted fractures.

This utility model discloses a controllable urine bag. The controllable urine bag includes a urine bag body and a catheter. A catheter connector for connecting to the catheter is located at the upper end of the urine bag body. A drainage tube with a valve is located at the lower end of the urine bag body. A pull-out assembly capable of opening and closing the lower outlet of the drainage tube is connected to the lower end of the drainage tube. A pull rope is movably mounted on one side of the pull-out assembly, and a fixing plate with a fixing rope is located on the other side of the pull-out assembly. The drainage tube is located at the lower end of the pull-out assembly. This utility model helps reduce the patient's resistance to urination and allows the patient to easily perform urination on their own in bed.

The utility model discloses a biological compatibility absorbable closer which comprises a connecting part, a lower arm and an upper arm are sequentially arranged on the outer side of the connecting part, anti-skid protruding blocks are fixedly connected to one side of the lower arm and one side of the upper arm at equal intervals, a fixing base is fixedly connected to the outer side of the lower arm, a containing groove is formed in the fixing base, and an elastic piece is arranged in the containing groove. The utility model relates to the technical field of absorbable occluders, the overall structure of the biocompatible absorbable occluder is made of biodegradable materials, the biocompatible absorbable occluder can be completely absorbed, extremely little rejection reaction is caused, no foreign matter is left in the body, and hemispheroidal anti-slip bumps are arranged on the lower arm and the upper arm, so that the slippage of vessels or tissues can be effectively prevented; by arranging the fixing base, the containing groove, the elastic piece, the connecting base, the connecting groove and the limiting groove, the function of limiting and fixing the two arms when the two arms are closed is achieved, the phenomenon of infirm closing is avoided, the phenomenon of slipping after closing can be prevented, and use is convenient.