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65results about How to "Permanent storage" patented technology

Method and system for managing scholarship based on blockchain technologies

InactiveCN107633469ASingle point of failureBacktracking benefitsFinanceDigital data protectionDigital signatureSmart contract
The invention discloses a method and system for managing scholarship based on blockchain technologies. The system involves a scholarship plan management worker, a school examiner, a finance departmentteacher and a student. The method includes the following steps: upon the establishment of a project, the scholarship plan management worker arranging a corresponding plan in a manner that a smart contract automatically perform examination, a student user applying for the scholarship; upon the examination by the school examiner and the scholarship plan management worker, adding an electronic department signature and a user digital signature; after the examination, proceeding to a stage of going-public, after the going-public period, recording the scholarship information that is approved to a to-be-delivered scholarship list, generating a corresponding digital scholarship certificate, and performing broadcasting to other nodes; and a smart contract that is established by the finance department teacher delivering the scholarship to the electronic accounts of scholarship owners, and broadcasting the information of delivering the scholarship to other nodes. According to the invention, thesystem and the method herein can automatically manage the entire life cycle of the scholarship in a secure manner.
Owner:JINAN UNIVERSITY

Carbonization reinforced regenerated aggregate, and preparation method and applications thereof

The invention discloses a carbonization reinforced regenerated aggregate, and a preparation method and applications thereof, and belongs to the technical field of building material. The preparation method comprises following steps: building garbage is crushed so as to obtain uniform aggregate particles; cement and admixture fine powder are weighted for uniform mixing so as to obtain a surface coated material; the prepared aggregate particles and the surface coated material are mixed, and are introduced into a granulator, water is sprayed uniformly for granulation so as to obtain a coated aggregate; the coated aggregate is introduced into a sealed environment or the natural environment for pre-curing; an aggregate obtained through pre-curing is introduced into a carbonization device for carbonization treatment so as to obtain the carbonization reinforced regenerated aggregate. The preparation method is adopted to prepare the light aggregate, so that aggregate light weight and high strength are achieved, aggregate cylinder compressive strength can be as high as 13.0MPa, and is higher than the using standard cylinder compressive strength 6.5MPa of common light aggregate. The production technology is simple; resource utilization of solid waste is realized; adsorption immobilization of carbon dioxide is realized; sintering is not needed; and low carbon emission and environment protection are realized.
Owner:NANJING UNIV OF TECH

Autogenously-pulverizable low calcium cement, and making method of prefabricated products thereof

The invention relates to an autogenously-pulverizable low calcium cement, and a making method of a prefabricated product thereof. The autogenously-pulverizable low calcium cement is made from limestone, sandstone and iron ore, the CaO content of the prepared autogenously-pulverizable low calcium cement is 40-60%, and the main mineral phase of the autogenously-pulverizable low calcium cement is CS, C3S2, gamma-C2S and a liquid phase. The activity of the cement is excited by using high-concentration CO2 gas in a short period (8h) to make the prefabricated products of the autogenously-pulverizable low calcium cement, and the prefabricated products can be a sheet, a building block, a brick and a tile, and can also be solid or hollow or porous high-strength prefabricated products. The problems of long curing period, high energy consumption and shrinkage cracking of ordinary Portland cement prefabricated products are solved in the invention; and additionally, the autogenously-pulverizable low calcium cement has the advantages of low energy consumption in the baking process, small CO2 discharge amount, high early strength, and slow increase of the later strength, and the product of the autogenously-pulverizable low calcium cement has the advantages of excellent physical and mechanical performances, good durability, fire and corrosion resistance, good decorativeness and processability, environmental protection, energy saving and emission reduction, and very good social, economic and environmental benefits.
Owner:HENAN POLYTECHNIC UNIV

Road rescue privacy protection system and method based on block chain in fog computing environment

The invention provides a blockchain-based road rescue privacy protection system and method in a fog computing environment, belongs to the technical field of Internet of Vehicles data privacy protection, and aims to generate system public parameters and calculate the pseudo identity of an OBU. In the method, a complete secret key of the OBU is calculated according to the system parameters and the pseudo identity, signcryption is conducted on vehicle information corresponding to the OBU within the validity period of the pseudo identity, the signcryption result is sent to the RSU to be subjectedto aggregation calculation and verification, and a ciphertext which is successfully verified is sent to the alliance chain; and a rescue corresponding platform nearest to the vehicle user is searchedaccording to the rescue request, then a search result and the ciphertext of the vehicle user on the alliance chain are sent to the TA for verification, and the verification result is verified and decrypted to a rescue response platform. According to the invention, the confidentiality and integrity of data are ensured, signed messages cannot be forged or modified by malicious vehicles, the real identity of a vehicle user is hidden and kept consistent, a trusted mechanism can track the real identity of the vehicle, and a secret key generation center has no complete private key of the vehicle user, so that the information security is ensured.
Owner:SHANDONG NORMAL UNIV

Artificial steel slag aggregate and preparation method and application thereof

PendingCN112266193AGood performanceAchieve permanent storageSolid waste managementBall millSilicate Cement
The invention discloses an artificial steel slag aggregate and a preparation method and application thereof. The preparation method comprises the following steps: step 1, grinding steelmaking tailingsby using a ball mill to obtain uniform steel slag powder; 2, weighing Portland cement, an admixture fine powder and steel slag powder, and conducting uniform mixing to obtain an aggregate raw material; 3, preparing an additive aqueous solution; 4, putting the aggregate raw material into a ball forming mill, and uniformly spraying the additive aqueous solution prepared in the step 3 to form balls,so as to obtain spherical artificial steel slag aggregate; step 5, putting the pelletized aggregate into a closed environment or a natural environment for pre-curing; and step 6, putting the pre-cured aggregate into a carbonization device for carbonization treatment to finally prepare the artificial steel slag aggregate. The artificial steel slag aggregate prepared by the method can achieve the goals of safety and high strength, the crushing index of the aggregate can reach 9.26% and reach the I-grade aggregate use standard, the production process is simple, the solid waste is recycled, the carbon dioxide is absorbed and cured, and the artificial steel slag aggregate is free of burning, low-carbon and environment-friendly.
Owner:NANJING UNIV OF TECH

Method for combined production of lightweight magnesium carbonate and ammonium chloride based on carbon dioxide sequestration

The invention relates to a method for the combined production of lightweight magnesium carbonate and ammonium chloride based on carbon dioxide sequestration. According to the technical scheme of the invention, the wastes of potassium salts dried in a salt lake are adopted as raw materials, and the pH value of a solution is adjusted by the liquid ammonia for the absorption of carbon dioxide in the industrial flue gas. An ammonium magnesium carbonate hydrate crystal generated during the above reaction is adopted as an intermediate product and the ammonium magnesium carbonate hydrate is refined to prepare the lightweight magnesium carbonate. In addition, the magnesium chloride raw material is added into an ammonium-rich solution after the reaction, and then the combined production of an ammonium chloride fertilizer is obtained after the solid-liquid separation process and the drying process. During the refining process of the ammonium magnesium carbonate hydrate, the generated carbon dioxide and the generated ammonia gas are fed back to the reaction solution to be re-absorbed, so that the utilization rate of raw materials is improved. The emission of the tail gas is reduced. During the salting-out process, a generated bittern concentrated liquid is fed back to a crystallization reactor to be used as raw materials for the absorption of carbon dioxide. The above method is energy-saving, environment-friendly, high in operability and easy to industrialize.
Owner:南京浦世环境科技发展有限公司

Solid waste management control system based on block chain

PendingCN113537877AMonitor delivery at any timeMonitor recycling at any timeSustainable waste treatmentCo-operative working arrangementsData packControl system
One or more embodiments of the invention provide a solid waste management control system based on a block chain, and the system obtains the image of the solid waste in a temporary storage cavity through reading the putting information, enables the image to be associated with the putting information, and enables a recovery transportation module to recover the solid waste when the recovery transportation module recovers the solid waste. The recovery module records recovery time and classified storage container information corresponding to the delivery information, the tracking module records a transportation path of the recovery transportation module, and generates a data packet, constructs a block and a corresponding hash code, and ensures that the information can be permanently stored by utilizing the characteristics of decentration, openness and autonomy of the block chain, and avoids the risk of tampering the information; the management personnel can monitor the throwing, recycling and transportation conditions of the solid waste at any time according to the information uploaded to the block chain platform, the whole process of solid waste management is monitored, part of or principal can be traced and the crux can be found for illegal operation in solid waste treatment, and the solid waste management control efficiency is improved.
Owner:HEFEI UNIV OF TECH +1

Logistics data publicity method and system based on block chain and IPFS

PendingCN111882260AHigh data stability and reliabilityGuaranteed EncryptionDatabase distribution/replicationDigital data protectionBlockchainNode count
The invention discloses a logistics data publicity method and system based on a block chain and an IPFS, and relates to the technical field of data storage. The method comprises the following steps: selecting an IPFS as a technology for sharing files and data; storing files and data in nodes of the mechanism of the interstellar file system based on the block chain through an API. randomly storingcell blocks in several to hundreds of IPFS nodes according to the IPFS synchronization principle of node data, after files and data are encrypted and subjected to hash segmentation; through an IPFS system, automatically segmenting the file into small file blocks by hash, archiving the small file blocks into the IPFS system, and generating a unique hash value; and publishing a hash value listcorresponding to hash values of files and data of all the mechanismsin a mainstream channel and an industry authority mechanism. By adopting a block chain technology and an interstellar file system storagetechnology, the method is applied to logistics file and data storage, the data privacy of related parties is ensured, meanwhile, the physical storage expenditure is saved, and the expenditure of manpower management is saved.
Owner:HEFEI WEITIANYUNTONG INFORMATION TECH CO LTD

Method for performing biogas desulfurization and decarburization by combining solid waste and waste alkali liquor

InactiveCN111575075AImprove mobile performanceFacilitates the diffusion processGaseous fuelsBiogasDecarburization
The invention discloses a method for performing biogas desulfurization and decarburization by combining solid waste and waste alkali liquor, and belongs to the technical field of biogas impurity removal and purification. According to the method, suspension liquid is prepared from basic oxide solid waste and waste alkali liquor; biogas is introduced into the suspension liquid so as to be subjectedto desulfurization and decarburization reaction, so that desulfurized and decarburized biogas purified gas can be obtained; alkaline substances in the waste alkali liquor are utilized to promote conversion of carbon dioxide into carbonate, promote conversion of hydrogen sulfide into metal sulfide, strengthen the formation of calcium and magnesium carbonate precipitates and achieve permanent fixation of the carbon dioxide and hydrogen sulfide. According to the method, the waste is used as raw materials, therefore, cost is low, and the win-win outcome of waste utilization and environmental protection is realized. The method is simple in reaction process and rapid in reaction, removes the carbon dioxide and hydrogen sulfide in the biogas at the same time, and is a biogas purification technology with high efficiency and low cost.
Owner:CHINA HUANENG GRP CO LTD +1

Plastic bag constant-volume inflating device

The invention provides a plastic bag constant-volume inflating device, which comprises a pressure stabilizing inflation device and a plastic bag opening suction opening and heat sealing device. The input end of a inflation control valve is connected with an air inlet pipeline, and the output end of the inflation control valve is connected with a pressure stabilizing device; the output end of the pressure stabilizing device is connected with an electromagnetic valve; the output end of the electromagnetic valve is connected with an inflation device; and the output end of the inflation device isconnected with a plastic bag opening opened through the plastic bag opening suction opening and heat sealing device through a needle tube of a vacuumizing inflation needle tube telescopic device. Theplastic bag opening suction opening and heat sealing device is provided with a plurality of rubber vacuum suction cups through a vacuum generator, the suction cups are sequentially arranged on the upper side and the lower side of the plastic bag opening in a face-to-face mode, and air cylinders are installed on suction cup supports respectively to control the supports to reciprocate. A PLC (Programmable Logic Controller) as well as the pressure stabilizing inflation device and the plastic bag opening sucking opening and heat sealing device which are connected with the PLC are arranged; and thedevice is simple in structure, effectively achieves the purposes of continuously controlling the pressure in the container to be stable, automatically sucking and opening the plastic bag opening, vacuumizing, constant-volume filling and heat sealing, and is safe and reliable in work and high in efficiency.
Owner:CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY

Modified desulfurized fly ash for fixing carbon dioxide and preparation method thereof

The invention discloses modified desulfurized fly ash for fixing carbon dioxide and a preparation method of the modified desulfurized fly ash, the modified desulfurized fly ash comprises desulfurizedfly ash, a nitrogen-containing silane coupling agent, ethanol and deionized water, and the mass ratio of the desulfurized fly ash to the nitrogen-containing silane coupling agent to the ethanol to thedeionized water is 1:(0.3-2):(0.3-2):(0.5-3). According to the modified desulfurized fly ash provided by the invention, a traditional method for fixing carbon dioxide by simply utilizing a calcium-based material is changed, amino functional groups are introduced to the surface of the desulfurized fly ash through modification of a nitrogen-containing silane coupling agent, the chemical adsorptioneffect of the carbon dioxide is improved, and the capability of fixing the carbon dioxide by the desulfurized fly ash can be greatly improved. The preparation method of the modified desulfurized fly ash is simple and easy to implement and convenient to operate. The modified desulfurized fly ash can be used as a filling component of a mined waste mine to realize fixation and permanent storage of carbon dioxide. The method can realize resource utilization of the dry desulfurization ash, and is low-carbon and environment-friendly.
Owner:CHINA UNIV OF MINING & TECH
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