8results about How to "Improve transfer ability" patented technology

The present application relates to sample supernatant transfer equipment technical field, and disclose a built-in filter element pollution prevention device for biological sample processing, including the platform, the top of the platform is fixedly connected with first connecting frame, the top of first connecting frame is fixedly connected with auxiliary assembly, the top of auxiliary assembly is fixedly connected with second connecting frame, the surface of one end of auxiliary assembly is slidably connected with sliding cover, the surface of the other end of auxiliary assembly is fixedly connected with control center. The both sides of the top of auxiliary assembly are fixedly connected with fixture, the inside of auxiliary assembly is provided with pasteur pipette, the rear end surface of auxiliary assembly is fixedly connected with vertical table, the top of pasteur pipette is provided with funnel shape, the bottom of pasteur pipette is provided with conical shape, the inside of the middle part of pasteur pipette is provided with filter element, the material of filter element is provided with polypropylene, polytetrafluoroethylene and nylon mixed material, the device has the advantages of improving the extraction effect of the device on sample supernatant, convenient for users to use and the like.

The application discloses a targeted adversarial attack enhancement method based on channel feature selection, belongs to the technical field of artificial intelligence security, and comprises the following steps: a heat map is calculated through a Grad-CAM algorithm, and a significant region is obtained; the significant region is supplemented to a significant map; a local image is obtained by randomly cutting the significant map; the local image is scaled to the same size as the original image; the original image and the local image are input into a CNN with the same adversarial perturbation; and a channel feature selection method is applied to optimize the adversarial perturbation. The application can improve the transferability of adversarial samples to a greater extent in the case of targeted attack; the application creatively applies model attention to targeted adversarial attack, so that the perturbation learns how to better transfer the significant features of the original image to the target category. The application focuses on improving the transferability of adversarial samples, thereby improving the success rate of black-box attack.

The utility model provides an instrument transfer device convenient to take and place, which comprises a bottom plate, a plurality of universal wheels arranged at the lower end of the bottom plate, a back plate upwards arranged on one side of the bottom plate, side plates upwards arranged on two sides of the back plate of the bottom plate, and a plurality of storage grooves sequentially distributed from bottom to top between the two side plates, the upper end and the side, away from the back plate, of each storage groove are open, the side, away from the back plate, of each storage groove inclines upwards, water leakage holes are formed in the bottoms of the two ends, close to the back plate, of each storage groove, a flat water storage barrel is placed at the upper end of the bottom plate, and two water receiving openings in one-to-one correspondence with the water leakage holes are formed in the upper end of the flat water storage barrel upwards. The two lowermost water leakage holes are downwards provided with flow guide channels corresponding to the water receiving openings in a one-to-one mode, and the side, away from the storage groove, of the back plate is connected with a handrail. According to the medical instrument transfer trolley, medical instruments can be placed and transferred in a three-dimensional mode, meanwhile, taking and placing are convenient, and the overall working efficiency can be effectively improved.

This invention relates to the field of battery fabrication, specifically disclosing a tetragonal zirconium dioxide / carbon sphere composite material and its preparation method and application. The method includes the following steps: (1) dissolving zirconium tetrachloride in a solvent, then adding dopamine, and after thorough dissolution and mixing, slowly adding ammonia water. As ammonia water is added, the solution gradually turns into a milky white opaque liquid. The solution is continuously stirred at room temperature until it gradually changes from milky white to brownish-black, obtaining a zirconium-based / polydopamine composite precursor; (2) centrifuging the obtained zirconium-based / polydopamine composite precursor, washing it to obtain a brownish-black precipitate, drying the brownish-black precipitate to obtain a brownish-black precursor powder; (3) calcining the precursor powder to obtain a tetragonal zirconium dioxide / carbon sphere composite material. This invention successfully constructs a metastable tetragonal zirconium dioxide composite catalyst induced by polydopamine and confined to the surface of carbon spheres.

The invention relates to a preparation method of an ionic liquid modified CuInS2 catalyst, which comprises the following steps: mixing soluble copper salt, soluble indium salt, thioacetamide and a solvent I to obtain a mixed solution, heating the mixed solution in a closed container to 140-180 DEG C, and washing and drying a solid product to obtain a CuInS2 material; and mixing the CuInS2 material, an ionic liquid and a solvent II, stirring, volatilizing the solvent, drying to obtain a pretreated catalyst, and roasting the pretreated catalyst in an inert gas or nitrogen atmosphere at 300-500 DEG C for 1-5 hours to obtain the ionic liquid modified CuInS2 catalyst. The method is simple and low in cost, and solves the problem of poor selectivity of reducing CO2 into ethylene through photo-thermal catalysis of an existing catalyst.

This application discloses a hollow hierarchical nanowire sensitive material, its preparation method, and an ammonia sensor. The preparation method includes the following steps: (1) adding hollow carbon nanofibers to a mixture of ethanol and water and mixing evenly, then adding nickel salt and urea sequentially, and reacting at 70-90°C. The resulting precipitate is washed and dried, and then calcined at 300-400°C to obtain nickel oxide nanowires; (2) adding the nickel oxide nanowires obtained in the above steps to water and dispersing evenly, then adding aniline, protic acid, and an initiator sequentially, and reacting at 0-4°C. The resulting precipitate is washed and dried to obtain the hollow hierarchical nanowire sensitive material. This application can improve the sensitivity of ammonia sensor monitoring.

This invention relates to the field of two-dimensional material preparation technology, specifically to a two-dimensional material-liquid field effect method for transferring two-dimensional materials, comprising: Step 1, placing a target substrate on a two-dimensional material, wherein the two-dimensional material is grown on a growth substrate, and drying the target substrate; Step 2, cutting the target substrate to expose the interface between the target substrate and the two-dimensional material; Step 3, continuously dripping liquid into the interface between the target substrate and the two-dimensional material. This invention does not introduce chemical contamination during the transfer process; it can significantly improve the ability of two-dimensional materials to transfer to a target substrate; it can self-drive the improvement of two-dimensional material transfer capability without the need for external electric field assistance; it does not involve high-temperature annealing or other methods, has low requirements for environmental humidity and cleanliness, and is widely applicable to various two-dimensional materials; it is simple to operate and low in cost. Considering the above advantages, this invention has good application prospects in the field of two-dimensional material application technology.

The utility model discloses a kind of crop breeding leaf sampling device, including sampling joint robot, the execution end of sampling joint robot is connected with sampler, sampler includes two cutters capable of moving oppositely or oppositely, the opposite end of two cutters is equipped with docking groove, the bottom of two cutters is equipped with docking block, two docking blocks can be partially or completely inserted into deep hole and form guiding channel communicated with docking groove and deep hole by surrounding together.The utility model in the present application, by setting docking block in the bottom of two cutters, two docking blocks can form guiding channel communicated with docking groove and deep hole by surrounding together, thereby improve the accuracy of sampling tube and transfer equipment docking.