12results about How to "Guaranteed long-term security" patented technology

The invention discloses a data security sharing method and system, and relates to the technical field of data security, and the method comprises the steps: receiving to-be-shared data uploaded by a data provider; fragmenting the data by adopting a biologically inspired adaptive fragmentation algorithm; generating a digital fingerprint for each fragment by using a multi-dimensional dynamic Hash algorithm; encrypting data fragments by adopting a post-quantum encryption algorithm and storing the data fragments in a decentralized network; recording the access authority, the digital fingerprint and the storage position information to a block chain security account book; when a data request is received, the access permission is verified; carrying out identity verification by adopting multi-mode biological feature recognition; after the verification is passed, obtaining a digital fingerprint and a storage position from the block chain; acquiring the encrypted fragments from the decentralized network and decrypting the encrypted fragments; verifying the integrity by using the digital fingerprint; and recombining the verified fragments to obtain complete data and returning the complete data to the requester. According to the method, efficient data sharing is realized while the data security is guaranteed, and the data value and privacy protection are effectively balanced.

The invention discloses a large-flux high-precision ceramic flat sheet membrane for removing iron and fishy smell of drinking tap water and a preparation method thereof, and belongs to the technical field of ceramic flat sheet membranes. The ceramic flat sheet membrane comprises a support body, a high-precision filter layer, an adsorption layer and a filling adsorbent. The preparation method comprises the following steps: 1) preparing a ceramic flat sheet membrane mud green body; (2) preparing a ceramic flat sheet membrane support body; 3) preparing a high-precision filter layer by a dip-coating method; (4) preparing an adsorption layer by a spraying method; and (5) filling a reinforced adsorbent and packaging an end. According to the present invention, the ultra-fine membrane material is used to produce the high separation precision, the effluent quality is ensured, the operation cost of the split type filtration is reduced, the molecular sieve adsorption membrane and the enhanced filling adsorbent are produced, and the iron ions in the urban tap water are effectively adsorbed; the vacuum dip-coating method is matched with the one-time sintering process, so that the working procedures can be saved, the yield is high, the membrane layer thickness and the membrane surface are uniform and consistent, basically no pore defect exists, and the flux and the precision stability of the ceramic flat membrane product are further stabilized.

The invention provides anisotropic thermoelectric hydrogel, which is characterized in that hydrogel is used as a matrix, and a thermoelectric material is dispersed and fixed in the hydrogel matrix; the hydrogel matrix is formed by biocompatible macromolecules through a directional freezing method or a mechanical stretching method, and has an anisotropic internal microstructure oriented in a single direction. Through a directional freezing or mechanical stretching process, a microstructure oriented in a single direction is constructed in the thermoelectric hydrogel, so that the hydrogel has anisotropy of shrinkage characteristics. The two preparation methods disclosed by the invention are both based on physical crosslinking and orientation technologies, complex chemical modification or expensive equipment is not needed, and effective design of the shrinkage anisotropy of the material is realized by controlling freezing conditions (such as liquid level height and cooling direction) or stretching parameters (such as stretching ratio and cycle index); and mutual conversion between heat energy and electric energy can be realized through a thermoelectric material in the hydrogel network.

The application discloses a prestressed anchor cable tensioning and protection integrated construction method in high-cold regions, and belongs to the technical field of slope reinforcement engineering. The method solves the problem that it is difficult to accurately determine the stable stage of frost heaving action in the construction of anchor cables in high-cold regions, which leads to improper construction timing of protection. The method comprises the following steps: drilling an anchor cable hole and installing a prestressed anchor cable; pouring a cement-based slurry into the anchoring section; installing an anchor cable dynamometer at the tensioning end to continuously monitor the anchor cable axial force; tensioning and locking the anchor cable and calculating the axial force change rate; burying a temperature sensor at the hole opening to continuously monitor the temperature and calculate the temperature change rate; comprehensively determining that the frost heaving action has reached the stable decay stage through multiple conditions; then, applying a protective coating, setting a sheath pipe and injecting sealant, and heating and solidifying by using an electric heating tape. The method realizes the integrated construction of tensioning and protection, accurately determines the stable timing of frost heaving, ensures the long-term safety of the anchor cable, and is suitable for slope reinforcement engineering in high-cold regions.

The invention provides a quantum key-based Ceph block storage encryption method and system, and belongs to the technical field of storage. A cryptographic phrase management system is arranged to provide a quantum random number password-based data encryption correlation operation function for a Ceph RBD client, so that a quantum security technology is applied to Ceph encrypted storage, and the encryption efficiency of the Ceph block storage is improved. The long-term security of the stored data can be ensured; and the architecture that the Ceph RBD client and the cryptographic phrase management system are separately deployed is adopted, so that the control capability on the data leakage risk can be improved, and the maintenance cost can be reduced.

The application belongs to the technical field of modified copolymer nylon and specifically relates to a modified PA6 material and a preparation method thereof. The application aims to solve the problem of high moisture absorption and lack of high insulation of the existing copolymer modified PA6 material. The application mixes caprolactam and lauryl lactam to obtain a PA6 / 12 random copolymer; pre-blends modified graphene oxide, boron nitride nanosheet and polyamide oligomer to obtain a composite suspension; coats the PA6 / 12 random copolymer on the surface, feeds the coated PA6 / 12 random copolymer into an extruder, adds the composite suspension after complete melting, uniformly mixes the composite suspension and the PA6 / 12 random copolymer, adds a flame retardant aid, and finally extrudes to obtain the modified PA6 material. The modified PA6 material prepared by the application has low water absorption and good insulation, and is not prone to electric leakage and tracking in a high-temperature working environment.

The invention discloses cryptographic module embedded software supporting an anti-quantum cryptographic algorithm and an implementation method, aiming at the problem that embedded equipment resources are limited, a layered architecture design is adopted, and threat detection, algorithm selection and a core cryptographic module are included. The method comprises the following steps: quantifying a quantum threat level (TL), combining resource states such as equipment memory, computing power, electric quantity and the like, adaptively selecting a traditional cryptographic algorithm or a PQC algorithm (CRYSTALS-Kyber, SPHINCS + variant) through a dynamic decision function, and reducing overhead by adopting technologies such as hybrid encryption, assembly optimization, sparse matrix and the like. According to the method, key generation, encryption and decryption, digital signature and algorithm seamless switching are realized, quantum attacks can be resisted, an embedded scene is adapted, an existing system is compatible, data security and service stability are guaranteed, and the method is suitable for terminal equipment which is limited in resource and needs to resist quantum threat, such as a smart power grid.

The invention relates to a high-performance organic silicon packaging adhesive for a photovoltaic module, the packaging adhesive is an organic high-molecular compound taking a silicon-oxygen bond as a main chain, and a colloidal elastomer is formed after the packaging adhesive is cured; the working temperature range of the packaging adhesive is-55 DEG C to 250 DEG C, the light transmittance of the packaging adhesive in a visible light range is not lower than 92%, and after the packaging adhesive is aged for 1000 hours under the double-85 test conditions of 85 DEG C and 85% relative humidity, the light transmittance retention rate is larger than 95%; the packaging adhesive is prepared from a monomer mixture containing dimethyl dichlorosilane and methyl trichlorosilane through high-temperature reaction, hydrolysis and condensation processes under the action of a composite catalytic system of copper and various high polymer materials, and finally a network polymer with linear and cross-linked structures is formed. The core purpose of the invention is to provide a revolutionary photovoltaic packaging material which is high in light transmittance, extremely stable in chemical property, capable of greatly improving the reliability, the service life and the power generation efficiency of a component, and environment-friendly and recoverable.

The present invention discloses an anchor clamp for amplifying anchoring force and a method for using the same, wherein the anchor clamp comprises: a clamping unit, a force transmission unit and an anchoring force amplifying unit; wherein the clamping unit is fixedly arranged around the outside of the anchor; the force transmission unit is fixedly arranged at the bottom end of the clamping unit; the anchoring force amplifying unit is fixedly arranged on a side of a plurality of the clamping units away from the anchor; after the clamping unit preliminarily clamps the anchor, the static load test pulling force is transmitted to the clamping unit and the anchoring force amplifying unit through the force transmission unit, so as to amplify the anchoring force and enable the anchor clamp to further clamp the anchor, and after the pulling force disappears, the force transmission unit and the anchoring force amplifying unit become invalid, thereby facilitating the disassembly of the anchor clamp, which not only improves the clamping effect and structural stability of the anchor clamp, simplifies the maintenance and replacement process, enhances the adaptability to complex work sites, but also further improves the safety and economy of the anchor clamp.

This invention relates to the field of construction technology in pebble-rich water-bearing areas, and more specifically, to a construction method for buildings in such areas. The method involves first digging drainage ditches around higher elevations to intercept surface water; then, integrating high and low elevation areas for unified excavation of the foundation pit, utilizing natural elevation differences and a gravity-fed drainage system using perforated UPVC pipes and graded crushed stone; setting up temporary water-retaining embankments and implementing staggered construction from high to low elevations, with closed-loop dedicated drainage channels at the junctions to direct water flow; installing prefabricated waterproof concrete collection wells in low-lying areas, forming a closed-loop waterproof system with foundation brick formwork and flexible waterproof membrane; and finally, constructing crushed stone drainage blind paths along the surrounding wall foundations and backfilling. This invention achieves continuous, all-weather, non-powered water control, ensuring the stability of the foundation pit slopes and zero leakage in the main structure. This invention is mainly applied to the construction of buildings in pebble-rich water-bearing areas.

The application discloses a kind of based on post-quantum signature operating system security authentication and key management method, belong to operating system security and quantum security technical field, including the following steps, establish the three-layer security architecture model based on hardware trust root-post-quantum signature chain-mixed key management;Operating system security authentication is carried out based on three-layer security architecture model;After security authentication passes, the whole life cycle management of post-quantum key is executed to generate key, and in the process, the way of hardware isolation and encryption protection is used to ensure that key is not leaked, traceable and controllable;Post-quantum signature and the post-quantum key obtained in the above step are deployed to the operating system and terminal equipment that have passed security authentication, the application uses the above method, realizes operating system full-scene anti-quantum security authentication, guarantees the safety of the whole life cycle of key, realizes the smooth compatibility with existing traditional cryptographic system, reduces migration cost, improves the overall security level of operating system.

The invention discloses a modularized sanitary control valve, which belongs to the field of sanitary valves, and comprises a valve body, a valve seat, a core rod and a valve cover, round valve cavities are formed in the valve body, and the valve cavities are communicated with one another. The core rod is configured to control closing and flow of the valve, and a control part of the core rod abuts against the interior of the connecting channel of the valve cavity; the valve seat and the valve deck are installed at the two ends of the control valve respectively and used for bearing and installing the control valve. The core rod is integrally machined and manufactured by a valve core and a valve rod, and the valve core is in an equal-percentage form. The modular system, the multiple valve bodies and the valve seats are combined, different circulation modes are formed according to different connections, adjustment can be conducted according to different requirements of users, the valve bodies and the valve seats are arranged and combined differently to be assembled into an angle-through valve, a straight-through valve or a three-way valve, and the advantages of being free of dead angles, residues and leakage, low in noise and the like are achieved; and the inner wall of the valve body is polished by a mirror, so that the valve is cleaner.