21results about How to "Reduce attack" patented technology

The present invention provides low immunogenic retinal pigment epithelial cells and methods of producing the cells. The present invention contains a step of obtaining a pluripotent stem cell that does not express major histocompatibility complex (MHC) class II protein or lacks the function thereof (step 1), and a step of inducing a retinal pigment epithelial cell from the pluripotent stem cell obtained in step 1 (step 2).

This invention belongs to the field of flexible functional thin film preparation technology, specifically relating to a method for preparing Janus-structured PDMS thin films and their applications. This method uses PDMS as a flexible substrate, and controls the preparation of titanium dioxide with different morphologies through evaporation-driven hydrothermal methods. Polypyrrole is then composited via in-situ polymerization. An asymmetric interface is constructed by coating two functional fillers: conical titanium dioxide and cracked spherical titanium dioxide, with polypyrrole. The functional layer is then prepared by casting, and finally cured to obtain the desired product. This invention utilizes the high absorption of sunlight by polypyrrole and the special morphology of conical titanium dioxide to improve the absorption rate of sunlight. Furthermore, the high reflectivity of titanium dioxide in the visible and near-infrared range enables passive energy-saving cooling and efficient de-icing and defrosting. While optimizing the spectral control performance of the thin film, it also solves the problems of poor weather resistance and limited functionality.

The application belongs to the technical field of semiconductor manufacturing, and discloses an inert gas assisted pixel planarization etching method, which comprises the following steps: etching a ROIC wafer with a metal column and a dielectric layer by using a mixed plasma containing fluorine-containing gas and oxygen-containing gas, and stopping etching when the metal column is completely exposed or slightly exposed; after the first step of etching is completed, stop feeding the fluorine-containing gas and the oxygen-containing gas, feed inert gas, and etch the surface of the ROIC wafer by using the inert gas plasma. By separating and combining the high-selectivity chemical etching and the low-selectivity physical polishing etching function, on the basis of controlling the first etching time to prevent the formation of pits, the second inert gas physical sputtering is used for surface smoothing and metal column height fine adjustment, the high planarity of the metal column and the dielectric layer surface is realized, the ideal interface foundation is provided for subsequent electrode deposition, and the device performance and the yield are improved.

The invention discloses a preparation method of high-stability superoxide dismutase (SOD), and belongs to the technical field of bioengineering and enzyme engineering. The method comprises the following steps: chemically modifying purified SOD (superoxide dismutase) under the conditions of low temperature and neutral pH (potential of hydrogen) by taking monomethoxy polyethylene glycol succinimido active ester as a modifier; carrying out ultrafiltration preliminary purification on the reaction liquid, then carrying out deep purification through ion exchange chromatography, and separating to obtain a high-purity modified product; and finally, sterilizing, filtering and freeze-drying to obtain the freeze-dried powder. According to the method, by optimizing a modification and purification process, the thermal stability and protease degradation resistance of SOD are remarkably improved, and meanwhile, most enzyme activity of SOD is effectively reserved. The prepared PEG-SOD product is high in purity and good in stability, and is suitable for preparing anti-inflammatory, anti-oxidation or anti-aging medicines and functional foods.

The embodiment of the invention provides a micro-front-end obfuscation method and a sub-application operation method, the method is applied to electronic equipment, and the method comprises the following steps: aiming at any sub-application of a micro-front end, dividing a source code corresponding to the sub-application into a plurality of code blocks, and generating a jump table corresponding to each code block and a jump table between the code blocks; analyzing the source code into an AST node, performing code obfuscation based on the AST node, and converting the obfuscated AST node into an obfuscated code; and loading the jump table, the obfuscated code and a configuration file to the sub-application, so that the sub-application performs code jump based on the configuration file and the jump table, and performs code dynamic loading based on the configuration file and the obfuscated code. According to the method, independent confusion is carried out on each sub-application, structure confusion is achieved by forming a code flow table, code confusion is efficiently carried out after source codes are converted into AST nodes, the cracking difficulty of attackers is increased, and the micro-front-end safety is improved.

The invention provides an application layer protocol transmission method, a computer program product, electronic equipment and a storage medium, and the method comprises the steps: obtaining user access information containing application layer protocol information; performing configuration conversion according to the user access information to obtain first message flow data; comparing the first message flow data with a first channel map to obtain second message flow data; analyzing the second message flow data to obtain a target data packet; and carrying out encrypted transmission on the target data packet. By implementing the application, the security and stability of the application layer protocol in the transmission process can be improved, attacks are reduced, the control strength is improved, the accuracy of data interaction is further improved, protocol transmission is more reasonable and effective, multiple potential safety hazards are avoided, and the risk of a user in access control is reduced.

The invention relates to the technical field of hair cosmetics, and particularly discloses a scalp allergy-relieving composition and application thereof. The scalp allergy-relieving composition is prepared by compounding amur corktree root extract, turmeric root extract, licorice root extract, scutellaria baicalensis root extract, rhizoma anemarrhenae root extract, astragalus membranacus root extract, medicinal rheum officinale extract, coptis chinensis root extract, yeast fermentation product filtrate and a solvent. The scalp allergy-relieving composition is added into the hair cosmetic to prepare the hair cosmetic with a scalp allergy-relieving effect. The method has the advantage of improving the soothing and anti-allergy effects of the hair cosmetics.

The application discloses a request identification method, which comprises the following steps: obtaining at least one access request initiated by a user equipment, and determining the subject of each access request; performing clustering processing on the at least one access request based on the subject, and obtaining at least one subject cluster; determining the behavior type represented by the access request initiated by the user equipment based on the number of access requests in each subject cluster; wherein the behavior type is used to represent whether the access behavior of the user equipment is the behavior of a program or script for automatically grabbing information on the World Wide Web. The application also discloses a request identification device, an electronic equipment and a computer readable storage medium.

The invention provides a data processing method and device and related equipment. A password service module is built in a service processor of a business system; configuring the service system in a trusted execution environment; when a user calls a server service of a system, a password processing module built in the system is used for carrying out password operation on service flow data generated by calling of the user, and a key of the password operation is generated and managed in a key management system of a trusted execution environment. And sending the data after the password processing operation to the called service business side, so as to return the data after the password operation to the user side through the service business side. According to the method and the device, the cryptographic operation is performed on the business data in the server with the trusted execution environment, so that the security of the data processing and circulation process is better improved through dual protection of the trusted execution environment and the cryptographic operation service, and the probability that the service is attacked or tampered is reduced. And better privacy is provided for service businesses.

The invention relates to the technical field of cosmetics, in particular to a composite peptide-containing composition for increasing skin elasticity and a preparation method thereof, and the composite peptide-containing composition comprises composite peptide and composite plant extract; the composite peptide is prepared from the following raw materials: oligopeptide-4, palmitoyl dipeptide-7, tripeptide-10 citrulline, and an antioxidant. The composite plant extract is prepared from the following raw materials: plumeria rubra flowers, chayote fruits and plantain fruits. Different peptides are selected to form the composite peptide raw material for improving the skin elasticity, so that multi-channel improvement on the skin elasticity can be adaptively realized, and the effect of improving the skin elasticity of a finished product is effectively improved. The white plumeria rubra flowers, the chayote fruits and the big banana fruits are blended and extracted, the active ingredients of the obtained compound extracting solution are diversified and complementary in effect, the compound extracting solution can have different effects of resisting oxidative stress reaction, removing various free radicals and reducing attack of reactive oxygen free radicals on skin collagen, and the remarkable anti-oxidation effect is achieved through the synergistic effect.

This application relates to a resource access system and a resource access method. The system includes: a network range platform, an authentication center, and multiple business systems; each business system, in response to a user's access request, redirects to the login interface of the network range platform; the network range platform redirects the login request to the authentication interface of the authentication center; the authentication center, upon successful authentication, redirects to the network range platform; the network range platform generates a service ticket, enabling the user to access the business systems using the service ticket; each business system, based on the service ticket and request signature, generates and sends a verification request to the network range platform; if the service ticket and request signature pass validity verification, the network range platform returns user information to the business systems, enabling the business systems to create a local session and configure access identification information based on the user information, allowing the user to access the resources of the business systems based on the access identification information. Using this system improves resource access security.

An embodiment of the present invention provides an information processing method, device, control plane network element and proxy network element, the method comprising: establishing a mapping relationship between the first edge user plane network element and the first port number assigned by the proxy network element to the first edge user plane network element; or, establishing a mapping relationship between the first edge user plane network element and the node ID according to the node ID of the first edge user plane network element; in the embodiment of the present invention, the proxy network element can realize signaling transfer, monitoring and isolation between the control plane network element and the edge user plane network element, reduce the possibility of network attacks by the edge user plane network element, and greatly reduce the scope of impact; it can also avoid the need to adjust the existing network structure due to frequent additions and subtractions of edge user plane network elements, reduce the workload of maintenance personnel, and avoid affecting the online use of services due to untimely deployment.

The invention relates to a color protection processing method for a compound fruit and vegetable beverage, and belongs to the technical field of beverage processing, and the color protection processing method comprises the following steps: S1, preparing fruit and vegetable raw materials including blackcurrant, mulberry, apple, cherry and celery, and cleaning the fruits and vegetables; s2, slicing apples, cherries and celery, then adding water and a color fixative into all the raw materials, pulping together, and then carrying out enzymolysis and enzyme deactivation treatment; and S3, filtering the pulp subjected to enzyme deactivation, adding auxiliary materials, homogenizing, degassing and sterilizing to obtain the compound fruit and vegetable beverage. According to the processing method disclosed by the invention, pigment of fruits and vegetables can be protected, loss, oxidation, fading and the like of the pigment are avoided, the color of the final product is amaranth, and the obtained compound fruit and vegetable beverage is good in taste and rich in nutrition.

The invention relates to the field of boron neutron capture therapy, and discloses a method for improving the corrosion resistance of an accelerator neutron source target cooling system, which comprises the following steps: 1) forming a periodic micron-order corrugated oxide film on the surface of a non-target material layer of a copper substrate of the accelerator neutron source target cooling system by laser marking treatment; (2) an alpha-Ta film of a body-centered cubic structure grows on the surface of the oxidation film through magnetron sputtering; and after passivation, the Ta2O5 is converted into a Ta2O5 passive film. The method comprises the following steps: firstly, forming an oxide film with a special shape of periodic micron-sized corrugation on the surface of a copper substrate by utilizing laser marking treatment; an alpha-Ta film is further grown on the surface of the oxidation film through magnetron sputtering; and the copper substrate is passivated into a Ta2O5 passive film, so that the corrosion resistance of the surface of the copper substrate is greatly improved.

The present application provides an automotive circuit board and a tinning treatment method thereof. The above-mentioned tinning treatment method for automotive circuit boards includes the following steps: photocuring the ink layer on the circuit board to obtain a photocured circuit board; degreasing the photocured circuit board to obtain a degreasing circuit board; microetching the degreasing circuit board to obtain a microetched circuit board; prepregging the microetched circuit board to obtain a prepreg circuit board; sequentially adjusting the temperature and complex concentration of the tinning solution to make the temperature of the tinning solution reach 66°C to 70°C and the complex concentration reach 140g / L to 160g / L; placing the prepreg circuit board into the adjusted tinning solution for chemical tinning. The above-mentioned tinning treatment method for automotive circuit boards has the advantages of being able to reduce the attack of the solution on the solder resist ink and reduce the depth of side etching while ensuring the deposition rate.

The invention relates to the technical field of data security of new energy electric vehicles, in particular to a lightweight security authentication method of a V2G system. According to the method, an online / offline V2G authentication system is provided, a trusted authority TA is allowed to allocate an anonymous identity and a private key for a vehicle in an offline stage, and partial generation and authentication steps of a pre-calculation signature are carried out to obtain a pre-calculation set. By means of the pre-calculation set, once a request message is given, the electric vehicle and the aggregator type charging / discharging station rapidly generate authentication signatures in the online stage respectively, and safety verification is completed. The method provided by the invention can solve the problems of weak computing power, small storage space and limited communication bandwidth of the embedded computer of the electric vehicle, and significantly improves the identity authentication efficiency between the electric vehicle and the power grid while ensuring the data security of the V2G system.

The invention relates to a file secure transmission method and device and a terminal, and belongs to the technical field of communication. Comprising the steps of collecting and verifying user information, scanning a picture of a to-be-transmitted file after verification succeeds, obtaining a file serial number and file data, comparing the file serial number with a stored file serial number, and judging whether the to-be-transmitted file is a duplicate file or not; when the to-be-transmitted file is a duplicated file, performing re-scanning; when the to-be-transmitted file is not the duplicate file, storing the file data; wherein the file data is the remaining data after the first n bytes are deleted in the file to be transmitted; the file data is stored at the offset address of the file serial number, the calculation formula of the offset address is (file serial number-1) * m, and m is a specified megabyte; and after the storage is completed, reading the file data and decoding to check the integrity. According to the method, the risks of hacker attack, illegal data copying and sensitive information leakage can be reduced, and meanwhile, file transmission failures caused by network or storage medium problems are reduced.

The invention relates to a photoluminescent material of polyurethane acrylate polymer encapsulated cadmium-based core-shell quantum dots and a preparation method and application thereof.The preparation method comprises the steps that after CdSe / CdS quantum dots in a hexane solvent are separated and purified, the CdSe / CdS quantum dots are evenly dispersed in a selected monomer solvent again; the preparation method comprises the following steps: packaging CdSe / CdS quantum dots by using a polyurethane acrylate prepolymer through a direct blending method, uniformly coating a substrate with a packaged quantum dot-polymer mixture through a scraper method, and carrying out UV curing to obtain the quantum dot-polymer nano composite material with high photoluminescence quantum yield. The method has the excellent characteristics of being simple and convenient to operate, high in repeatability, adjustable in macroscopic size and the like. The CdSe / CdS / PUA nano composite material shows good chemical compatibility, meanwhile, the polyurethane acrylate polymer encapsulation layer provides physical isolation for the quantum dots, the reabsorption phenomenon among the quantum dots is effectively reduced, so that the fluorescent property and the luminous efficiency of the quantum dots are kept, and the CdSe / CdS / PUA nano composite material has wide application prospects in the field of photoluminescent materials.

The invention provides a game testing method and device and electronic equipment, cloud processing is carried out on a game package of a target game running on a game server side, so that the game server side compresses a rendered game picture and then transmits the compressed game picture to a cloud side through a network, and a testing side obtains the game picture from the cloud side to carry out game testing; in the game testing process, environment information of a testing end and audio and video data for a target game are obtained from the testing end; based on the environment information and the audio and video data, performing leakage prevention risk detection on the test end, and if a leakage risk is detected, terminating a game test of the test end and sending alarm information to a specified system; and if the game test is finished, storing the audio and video data and generating a test report corresponding to the target game based on the audio and video data. By means of the mode, information in the testing environment can be collected and analyzed in real time, potential leakage risks can be rapidly recognized, the safety of the game is improved, and the risk that the game is attacked and stolen in the development and testing stages is reduced.

The utility model discloses a multifunctional safety arm shield which comprises a mounting frame, two sliding rods are symmetrically distributed and fixedly connected to the left inner side wall and the right inner side wall of the mounting frame, two first buffering assemblies are arranged at the two ends of each sliding rod and connected with a supporting rod, one end of each supporting rod is hinged to the middle of an arm shield body, and the other end of each supporting rod is hinged to the right inner side wall of the mounting frame. Two anti-chopping pointed cones are symmetrically distributed and fixedly connected to the side face of the arm shield body, a plurality of second buffering assemblies are arranged between the mounting frame and the arm shield body, a neck clamping plate is fixedly connected to the left side face of the mounting frame, and a holding handle is fixedly connected to one end of the side face of the mounting frame. When the arm shield is used, vibration borne by the arm shield body is transmitted to the supporting rod and the connecting rod, the supporting rod extrudes the damping spring through the sliding block, the connecting rod extrudes air in the fixing pipe through the piston, double buffering is formed through deformation generated by the damping spring and damping force generated by compressed air, and impact of striking on arms is relieved.

The invention discloses a corrosion-resistant silicone rubber composition and a preparation method thereof.The silicone rubber is prepared from, by weight, 80-100 parts of polysiloxane, 5-10 parts of a modified additive and 0.03-0.05 part of a Karst catalyst, when the raw materials are injected into a mold to be subjected to high-temperature reaction, Si-H bonds on a polysiloxane molecular chain are grafted with double bonds on the modified additive, and when the raw materials are injected into the mold to be subjected to high-temperature reaction, the Si-H bonds on the modified additive are grafted with the double bonds on the modified additive; the cross-linked network can reduce molecular chain segment movement, reduce diffusion paths of corrosive media and effectively prevent permeation of corrosion factors such as moisture, oxygen and ions, methyl, phenyl and fluoroalkyl of side chains further shield a main chain through a hydrophobic effect, permeation and attack of chemical media are reduced, and the corrosion resistance is improved. The inorganic filler part can form a physical barrier in the material, so that the corrosion resistance effect of the prepared silicone rubber composition is further improved.