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Wireless sensor network multi-source data fusion method based on queries
InactiveCN103139862ABalance scaleReduce energy consumptionEnergy efficient ICTPower managementWireless sensor networkingData transmission
The invention relates to a wireless sensor network multi-source data fusion method based on queries. The wireless sensor network multi-source data fusion method based on the queries comprises clustering, interest spreading and data transmission. In the clustering process, node residual energy to cluster, density of a node placed area and the distance from cluster heads to a base station are utilized. In the interest spreading process, a sink node firstly spread interest news to all cluster heads which then determine whether interest is spread inside clusters according to actual conditions. In the data transmission process, a neighbor node large in priority is chosen as a next jumping node. A priority function enables query data to be transmitted to the sink node along the route which is small in energy consumption, large in residual energy and short in distance according to introducing of neighbor node positions, the fact that whether introduced nodes are source nodes or the cluster heads, residual energy, communication cost of two nodes and the like, and data fusion is performed on the data intersecting position. The wireless sensor network multi-source data fusion method based on the queries can effectively balance node energy consumption in networks, improve energy using efficiency and prolong a network life cycle.
Owner:JIANGNAN UNIV
Method for communication between nodes of block chain, digital certificate management method, devices, and electronic equipment
InactiveCN107592293AEnsure safetyImprove securityCryptography processingUser identity/authority verificationElectronic equipmentBlockchain
The application discloses a method for communication between the nodes of a block chain, which includes the following steps: a second node receives a first communication request sent by a first node,wherein the first communication request includes the digital certificate of the first node, and the digital certificate of the first node is stored in a block chain to which the first node and the second node belongs; the second node verifies whether the digital certificate of the first node is legal according to the first communication request and certificate legality information, wherein the certificate legality information is stored in the block chain and used to reflect the legality state information of the digital certificate of a node; and if the digital certificate of the first node islegal, the second node determines whether to establish a communication connection with the first node. The application further discloses a method and a device for managing digital certificates based on a block chain, and corresponding electronic equipment.
Owner:ADVANCED NEW TECH CO LTD
Method for preparing graphene powder by electrochemistry
The invention discloses a method for preparing graphene powder by electrochemistry. The method solves the technical problems that the pollution on environment caused in production process is reduced, and the preparation cost is reduced. The method comprises the steps of applying 0.1-2.5V and 10-25V direct-current voltage between the positive pole and the negative pole of an electrolytic cell; filtering, washing and drying; dispersing in an organic solvent; collecting clear liquid containing graphene; and drying to obtain graphene. Compared with the prior art, the method of the invention uses electrochemistry synthesis, carries out fast synthesis from raw material graphite by processes of layer inserting and inserting-off, avoids addition of harmful chemical reagents in redox process, reduces pollution on environment, reduces cost, is simple and fast in preparation process, and is convenient for industrial production. The prepared graphene powder is graphene with 1-20 layers, is widely applied to the technical fields of lithium-ion batteries, supercapacitors, solar batteries, electro-catalysis, bio-analysis and biosensors.
Owner:深圳市贝特瑞新能源技术研究院有限公司
Authentication group key management method based on identity
InactiveCN101431414AAvoid hostingSolve tough problemsKey distribution for secure communicationUser identity/authority verificationGroup sessionKey escrow
The present invention discloses a identity-based authentication group key management method which comprises the following steps: embedding ID into key with bilinear pairing in elliptic curve; generating Ci as part of main key ui according to the secret key and ID of group member ui by key generating center, and transmitting the Ci to ui through overt channel; generating main key according to Ci and its own secret key by each group member ui; calculating overt key verification information according to Hash value of main key and over key by each group member, and broadcasting the link between over key and verification information inside the group; calculating the secret value sharing with left and right neighbors when the received information is verified to be true by each group member, and calculating the group member information Xi included in group session key according to the secret value, and then broadcasting the Xi inside the group; calculating group session key K according to all Xj, j=1, ...,n, by each group member. The invention has the advantages of no key escrow and no need of secure channel, which can be applied in coordination and distributed network as secure reliable group communication.
Owner:XIDIAN UNIV
Road traffic navigation system and navigation route generation method
InactiveCN101929864AAccurate short-term traffic flow forecastingReliable short-term traffic flow forecastingInstruments for road network navigationInformation processingUser input
The invention relates to a road traffic navigation system, which comprises a road traffic monitoring system, an information processing center and an intelligent terminal. The road traffic monitoring system consists of a plurality of monitors which are distributed on all road sections for monitoring instant traffic conditions of the road sections where the monitors are positioned and regularly refreshing information of the road, which is stored in the information processing center. Maps, vehicle information and traffic information of all the road sections and nodes positioned in the road traffic monitoring system are stored in the information processing center. A user inputs a navigation request on the intelligent terminal; the intelligent terminal requests the information processing center to feed back road condition information which is customized aiming at the user according to a vehicle ID of the user, generates a navigation route according to the information and displays the navigation route to the user; and after the navigation route is generated primarily, the intelligent terminal regularly refreshes the navigation route in a rolling mode so as to provide real-time effective information for travelers, help the travelers better carry out route selection, shorten travel time and make vehicles bypass the crowded road sections to avoid entering the crowded road section and avoid large-scale traffic jam.
Owner:SHANGHAI HIGH SCHOOL
Database system and a method of data retrieval from the system
InactiveUS7933920B2Easy searchWithout extra loadData processing applicationsWeb data indexingData retrievalData storing
Metadata pertaining to real data stored in at least one database (DB) are collected and managed at a single meta DB server, and metadata that match a retrieval request are extracted by search of the meta DB server. Even when a plurality of DBs and DB servers for managing DBs are present on a network, all metadata that match the retrieval request can be extracted independently of the DBs that the metadata pertain to. Hence, all data that match a retrieval request can be obtained from a single server, independently of the actual locations of the distributed DBs and DB servers.
Owner:NSSOL
Long glass fibre reinforced nylon material and preparing method thereof
The present invention belongs to high polymer material and forming and processing field thereof, and provides a long glass fibre reinforced nylon material and preparing method thereof, wherein the constituents comprise: 29-67wt% of nylons, 30-60wt% of long glass fibre, 2-10wt% of compatilizer and 0.3-1.0wt% of antioxidants. The preparing method comprises the following steps: first mixing the nylons, compatilizer and antioxidants; adding the mixture into a double-screw extruder, wherein the processing temperature is 235-300 DEG C; extruding resin fondants into a dipping mould connected to the double-screw extruder; enabling the long glass fibre to pass through the dipping mould, wherein the dipping temperature of the dipping mould is 260-300 DEG C, dipping the long glass fibre completely in by the fondants, cooling, dragging and granulating the long glass fibre to obtain the long glass fibre reinforced nylon materials. The method of the present invention can strengthen the dipping effect of glass fibre in nylon fondant, eliminate or decrease harmful substances, reduce environmental pollution, and improve the dipping effect and mechanical property of materials effectively.
Owner:NANJING JULONG SCI&TECH CO LTD
Composite gel inhibitor for preventing and controlling spontaneous combustion of coal in coal mine and preparation method thereof
InactiveCN101713296AReduced oxygen uptakeEasy to isolate and contactOther chemical processesDust removalSpontaneous combustionWater soluble
The invention relates to a composite gel inhibitor for preventing and controlling spontaneous combustion of coal in a coal mine and a preparation method thereof. The composite gel inhibitor provided by the invention comprises the following components in percentage by weight: 10 to 65.0 percent of graft copolymer, 0 to 4.00 percent of flame retardant, 20 to 60.0 percent of water glass, and the balance of water. The graft copolymer containing a -COOH functional group is obtained by adopting a water soluble polymer and unsaturated carboxylic acid monomers to perform graft copolymerization, and the composite gel inhibitor for preventing and controlling the spontaneous combustion of the coal in the coal mine is obtained by adding the flame retardant and the water glass into the graft copolymer. The flame retardant provided by the invention has the advantages of excellent retarding effect, environmental friendliness and the like.
Owner:府谷能源投资集团五一矿业有限公司
Production process of wool protein compound viscose fiber
ActiveCN102560735AAvoid joiningReflect the superiority of environmental protectionConjugated cellulose/protein artificial filamentsWet spinning methodsPolymer scienceSpinning
The invention provides a production process of wool protein compound viscose fiber, which belongs to the technical field of viscose fiber. The process comprises the steps of preparing a wool protein spinning solution, blending the wool protein spinning solution with a viscose spinning solution, spinning, solidifying and curing and performing aftertreatment to obtain the wool protein compound viscose fiber. In the invention, the addition of toxic substances is avoided, the obtained finished product is more suitable for manufacturing the textile products with high safety, such as intimate apparels and the like, and shows the advantages in environmental friendliness.
Owner:CHENGDU GRACE FIBER +1
Micromechanical heat conductivity sensor having a porous cover
InactiveUS20050025215A1Overcome disadvantagesShort response timeThermometer detailsAnalysing fluids using sonic/ultrasonic/infrasonic wavesDiffusionEngineering
A micromechanical thermal-conductivity sensor is provided which includes a thermally insulated diaphragm formed by a recess in a base plate exhibiting poor thermal conductivity. At least one heating element is applied on the diaphragm, at least one temperature-dependent electrical resistor is applied on the diaphragm for measuring the temperature of the diaphragm, as well as at least one further temperature-dependent electrical resistor is applied outside of the diaphragm on the base plate for measuring the ambient temperature. On one or both of its sides, the diaphragm is covered by a porous cover plate permitting gas exchange by diffusion, a cavity being left open between the diaphragm and the porous cover plate.
Owner:ROBERT BOSCH GMBH
A combined process for treating heavy metal complexing waste water
ActiveCN104108819AIncrease profitReduce TOC and COD valueWater contaminantsMultistage water/sewage treatmentIonChemistry
A combined process for treating heavy metal complexing waste water is disclosed and belongs to the field of waste water treatment. The combined process includes steps of: (1) adding a ferric salt into the complexing waste water containing the target heavy metal to subject the ferric salt and the target heavy metal to a replacement reaction so as to release a target ion; (2) subjected the waste water after replacement to ultraviolet light irradiation to destroy complexes in the waste water; and (3) adjusting the pH value of the waste water to precipitate the target metal and iron, performing solid liquid separation to complete the processing process of the waste water. The combined process mainly destroys carboxyl of a complexing agent, so that the combined process has certain selectivity. Compared with methods in the prior art that degrade organic matters by utilization of hydroxyl radicals, the combined process has higher selectivity. When the content of a complexing mechanism in the total organic matters is not high, the combined process can maintain a high utilization rate.
Owner:NANJING UNIV
Block chain verification method, device and apparatus and storage medium
ActiveCN108985772AGuaranteed validitySolve the "double spending" problemFinanceProtocol authorisationSource Data VerificationValidation methods
The embodiment of the invention discloses a block chain verification method, device and apparatus and a storage medium. The method comprises the following steps: a block verification node receives a block to be verified sent by a block generation node, and the block generation node is a node selected through a set consensus mechanism; the block verification node obtains financial transaction datain the block to be verified, wherein the financial transaction data includes at least one historical data identification information associated with the historical financial transaction data; the block verification node performs data verification on the financial transaction data in the block to be verified according to the historical data identification information of the financial transaction data. The technical scheme of the embodiment of the invention can effectively avoid the wrong data from being added into the block chain, thereby ensuring the validity of the data in a block chain network.
Owner:SHANGHAI DAJIAYING INFORMATION TECH CO LTD
Method for synthesizing chabazite-type molecular sieve with high silica-alumina ratio by using seed crystal and composite inorganic base and application thereof
ActiveCN104129800AReduce water usageHigh solid contentMolecular sieve catalystsHydrocarbon from oxygen organic compoundsMolecular sievePotassium hydroxide
A method synthesizing a chabazite-type molecular sieve with high silica-alumina ratio by using seed crystal and composite inorganic base is as below: evenly mixing an alkaline silica sol and a template; slowly adding potassium hydroxide; adding sodium hydroxide; continuing to stir; then slowly adding an aqueous solution of aluminum sulfate; adding a chabazite crystal phase molecular sieve as the seed crystal; distilling to remove excessive water; sealing, insulating and stirring; conducting high speed shearing to obtain a uniform gel; and conducting crystallization, roasting and ammonium exchange to obtain a product. The invention has the advantages of high silica-alumina ratio, high specific surface area, high MTO diolefin selectivity and pollution-free preparation process.
Owner:天津众智科技有限公司
ZIGBEE equipment networking method
The invention belongs to the field of network communication and particularly relates to a ZIGBEE equipment networking method. The ZIGBEE equipment networking method comprises the steps that an intelligent terminal obtains identifying information which identifies ZIGBEE node equipment in a unique mode; the intelligent terminal analyzes the identifying information and sends the identifying information to a coordinator, meanwhile, the coordinator is controlled to be in a network-entry allowing mode for working, and the coordinator broadcasts PAN ID to a network; after the ZIGBEE node equipment receives PAD ID, a network-entry request is sent to the coordinator according to the PAD ID, and meanwhile the identifying information is sent to the coordinator; and the coordinator verifies the received identifying information sent by the ZIGBEE node equipment and the identifying information sent by the intelligent terminal, if the identifying information is consistent, verification is successful, and the ZIGBEE node equipment is allowed to join the network. The method is suitable for ZIGBEE equipment networking.
Owner:SICHUAN CHANGHONG ELECTRIC CO LTD
Design and preparation of coagulation time controllable high performance polycarboxylic acid water reducing agent
The invention relates to the design and synthesis of a poly carboxylic acid water reducing agent, the coagulating time of which can be controlled. The poly carboxylic acid water reducing agent is prepared by co-polymerize the following three monomers in water: the monomer a occupying 30 to 70 percent and indicated by a general expression 1, the monomer b occupying 10 to 50 percent and indicated by the general expression 2, and the monomer c occupying 10 to 40 percent and indicated by the general expression 3. The coagulating time is controlled by the monomer a which is made by condensing maleic anhydride and polyoxyethylene monoalkyl ether. The length of a polyoxyethylene monoalkyl ether chain controls the change of the coagulating time: the longer the chain, the shorter the coagulating time is; and the shorter the chain is, the longer the coagulating time is. The monomer a does not contain inhibitive substances in the process of synthesis, therefore, the water reducing agent is easy to be controlled in the coagulating process. The poly carboxylic acid water reducing agent is suitable for the construction of concrete under different temperature conditions: under higher temperature, the water reducing agent with longer coagulating time can be adopted, and under lower temperature, the water reducing agent with shorter coagulating time can be adopted. The poly carboxylic acid water reducing agent has good adaptability to cement and admixtures and has the advantages of low mixing quantity, good slump constant hold facility and water segregation resistance, and the like.
Owner:武汉格瑞林建材科技股份有限公司
Hot rolling steel plate for automobile girder, and manufacturing method thereof
The present invention provides a manufacturing method of a hot rolling steel plate for an automobile girder. The production method comprises a steelmaking step, a continuous casting step, a heating step, a hot continuous rolling step and a coiling step, and is characterized in that components of the molten steel after steelmaking comprise 0.05-0.1 wt% of C, 0.15-0.35 wt% of Si, 1-2 wt% of Mn, 0.01-0.1 wt% of Nb, 0.03-0.12 wt% of Ti, less than or equal to 0.025 wt% of P, less than or equal to 0.01 wt% of S, and the balance of Fe and unavoidable impurities, a finish rolling temperature in the hot continuous rolling step is 830-900 DEG C, and a coiling temperature is 600-700 DEG C. The present invention further provides the hot rolling steel plate prepared by using the method and provided for the automobile girder. With the manufacturing method, production cost is reduced, and rolling process control is simple. With the hot rolling steel plate for the automobile girder, hot rolling product structures are substantially enriched and improved.
Owner:PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
Ethylene vinyl acetate (EVA) glue film for encapsulating solar battery
InactiveCN102559079AAvoid churnGuaranteed service lifeNon-macromolecular adhesive additivesFilm/foil adhesivesFluorescenceSilanes
The invention discloses an ethylene vinyl acetate (EVA) glue film for encapsulating a solar battery. The EVA glue film comprises the following components in part by mass: 100 parts of ethylene-vinyl acetate copolymer, 0.7 to 1.1 parts of crosslinking curing agent, 0.4 to 0.8 part of crosslinking aid, 0.4 to 0.8 part of coupling agent, 0.1 to 0.5 part of antioxidant and 0.1 to 0.5 part of fluorescence complex, wherein the mass percentage of the ethylene-vinyl acetate copolymer is 20 to 40 percent; the crosslinking curing agent is tert-butyl peroxide 2-ethyl hexyl carbonic ester; the crosslinking aid is triene propyl isocyanate trimer; and the coupling agent is gamma-(methyl propylene acyloxy)propyl trimethoxy silane. After the battery pack is heated and encapsulated, the olefinic bond of the fluorescence complex and the EVA perform copolymerization, so that the fluorescence complex is firmly fixed in the crosslinking cured EVA glue film through the chemical bond, loss of the fluorescence complex is effectively avoided, the service life of the battery pack is guaranteed, and ultraviolet light is effectively utilized.
Owner:SUZHOU TECHN SOLAR FILM MATERIAL
Sigma-Delta modulator and Sigma-Delta analog to digital converter containing same
ActiveCN102420614AEliminate digital logic delaysEliminate transfer function variationDelta modulationDelta modulationIntegrator
The invention discloses a Sigma-Delta modulator and a Sigma-Delta analog to digital converter containing the modulator. The modular comprises a first gain unit, a first analog subtractor, a first delay integrator, a third gain unit, a second analog subtractor, an integrating circuit structure, a fifth gain unit and a quantizer which are sequentially connected from an input end to an output end, a first feedback DAC (Digital-to-Analog Converter), a first analog differentiator and a second gain unit which are sequentially connected from an output end of the quantizer to the first analog subtractor, and a second feedback DAC, a second analog differentiator and a fourth gain unit which are sequentially connected from the output end of the quantizer to the second analog subtractor; a signal output by the first gain unit and a signal output by a first feedback passageway are differed by the first analog subtractor; and a signal output by the third gain unit and a signal output by a second feedback passageway are differed by the second subtractor. According to the invention, the digital logical delay of DAC feedback passageways can be eliminated when assemblies of reforming feedback DACmismatch.
Owner:PEKING UNIV
Method for smelting lead-containing waste and copper-containing waste synchronously in molten pool
ActiveCN103667712ASimple and efficient processLow metal content in slagProcess efficiency improvementScrapCopper
This invention provides a method for smelting lead-containing waste and copper-containing waste synchronously in a molten pool. The method comprises the following steps: (1) mixing the lead-containing waste, the copper-containing waste, one or more fluxes and carbon-containing reducing agents and then pelletizing, wherein the ratio of the lead-containing waste and copper-containing waste is controlled to achieve the effect that the mass ratio of (Cu+Fe):S is (1.75-4):1; (2) adding the mixture to the smelting equipment (i.e. the molten pool), wherein the mass ratio of water-quenched slag to the furnace burden (i.e. the mixture) is (0.7-5):1, and the smelting temperature is 1050-1250 DEG C; (3) keeping the smelting temperature for 30-180 min for separating and clarifying lead alloy, copper matte and smelting slag. According to the invention, the method can be used for treating the lead-containing waste and the copper-containing waste synchronously; the process is efficient and simple; the direct recovery rates of lead and copper can reach above 75% respectively; the metal content of the generated slag is low, and the slag can be used as a building raw material; the extraction and separation of lead, copper and other elements in the wastes can be realized through one step; the lead is concentrated in the lead alloy, and the copper is concentrated in the copper matte; the product additional value is high; the subsequent processing is simple.
Owner:CENT SOUTH UNIV
Method for gasifying carbonaceous organic materials and gasification furnace
ActiveCN103555370AReduce consumptionRaise the reaction temperatureGranular/pulverulent flues gasificationMetallurgyReaction temperature
The invention provides a method for gasifying carbonaceous organic materials. The method comprises a co-gasification step of simultaneously gasifying a slurry carbonaceous organic material and a powder carbonaceous organic material in a same gasification furnace according to a certain proportion, and a co-gasification fine adjustment step of adjusting the material conveying proportion of a gasifying agent, the powder carbonaceous organic material and the slurry carbonaceous organic material according to the coal gas temperature at an outlet of the gasification furnace. The invention also provides a gasification furnace used in the method for gasifying the carbonaceous organic materials, and the gasification furnace comprises a temperature feedback control module. By adopting the method and the gasification furnace provided by the invention, the consumption of water is reduced, the gasification efficiency is improved, the reaction temperature of the gasification furnace is improved at the same time, and then a number of gasification raw materials which can not be gasified by the prior art due to a high ash fusion point can be gasified, so that the selection range of coal types can be improved through the method and the gasification furnace provided by the invention. Furthermore, by adopting the gasification furnace, the injection ratio of the gasifying agent to each gasification raw material according to the temperature of the outlet coal gas can be adjusted, so that the fine adjustment of co-gasification can be realized.
Owner:ENN SCI & TECH DEV
Grapheme-polyaniline super capacitor electrode material and preparation method thereof
InactiveCN103137342ASimple preparation processLow costHybrid capacitor electrodesHybrid/EDL manufactureCvd grapheneAuxiliary electrode
Owner:YANSHAN UNIV
Long glass fibre reinforced polypropylene material and preparation method thereof
The invention belongs to field of a polymer material and shaping thereof, in particular to a long glass fiber reinforced polypropylene material and a preparation method thereof. The long glass fiber reinforced polypropylene material is prepared from the following components: 35-68wt% of polypropylene, 30-60wt% of long glass fiber, 1-5wt% of compatilizer and 0.3-1.0wt% of antioxidant, wherein the polypropylene is polypropylene with a melt index as high as 50-500g / 10min. The preparation method comprises the following steps: mixing the polypropylene, the compatilizer and the antioxidant; feeding the mixture in a double-screw extruder; enabling the long glass fiber to be fully soaked by melts through a soaking die; and cooling, drawing and pelletizing the fully soaked long glass fiber to obtain the long glass fiber reinforced polypropylene material. By the invention, the soaking effect of the glass fiber in polypropylene melts can be reinforced, substances harmful to human bodies can be eliminated or reduced, the odor is lightened, and the soaking effect and mechanical property of the material can be effectively improved.
Owner:NANJING JULONG SCI&TECH CO LTD
Method for adding LAN subscriber into group communication in instant communication
ActiveCN1968117AGuaranteed security and privacyAvoid joiningSpecial service provision for substationData switching by path configurationClient-sideLocal area network
The invention relates to a method for accessing local user into group communication in instant communication, wherein said method comprises that: 1.1 group manager client sends access request data pack to the local network user client, while said pack has user mark and group mark of said manager; 1.2 local network user client based on said pack decides to access or not, when it decides to access into said group, it will send group access protocol command to the group manage server, while the protocol command contains group mark and user mark of local network user; 1.3 group manage server sends access request system message to the group manager client relative to the group mark, and the client based on system message identifies the user, and accesses passed user into group. The invention can improve safety.
Owner:TENCENT TECH (SHENZHEN) CO LTD
Production method for extracting tryptophan from fermentation liquor by one-step refining
ActiveCN101863822ANot prone to membrane foulingShort filter timeOrganic chemistryFood processingUltrafiltrationSolvent
The invention discloses a production method for extracting tryptophan from fermentation liquor by one-step refining, which comprises the pretreatment of the fermentation liquor. In the method, mycoprotein is filtered off by using a ceramic microfiltration membrane, is decolorized by using an ultrafiltration membrane and is desalted and concentrated by using a nanofiltration membrane; the nanofiltration membrane concentrated liquor is directly decolorized by using activated carbon, the decolorized liquor is subjected to isoelectric point crystallization at a low temperature, and a qualified competitive product is obtained by rinsing with ice water during centrifugal separation; the crystallization mother liquor returns to the nanofiltration membrane for circulation; protein feed with high additional value is prepared by mixing, drying and crushing the ultrafiltration strong liquor and mycoprotein; and nanofiltration strong brine can be used as a culture medium for later use or sold serving as a base fertilizer. The method has the advantages of avoiding adding an organic solvent and an inorganic solvent in the preparation process of a crude product and a fine product, saving the solvent recovery cost, solving the problems of sewage treatment and environmental pollution, along with high utilization rate of the mother liquor, high product quality, and more contribution to industrial production, wherein the total extraction yield of L-tryptophan is 83.5 percent in a 500-ton production line.
Owner:HENAN JULONG BIOLOGICAL ENG CO LTD
Method and device for recovery and purifying elemental sulfur from high-concentration sulfate wastewater
ActiveCN103172218AEasy to solveResolve inhibitionSulfur preparation/purificationMultistage water/sewage treatmentHigh concentrationSulfate
The invention relates to a method and a device for recovery and purifying elemental sulfur from high-concentration sulfate wastewater. According to the invention, high-concentration sulfate wastewater is subjected to a biological desulfurization treatment; and recovery and purification upon elemental sulfur produced during the biological desulfurization process are realized with an extraction method. The device comprises sequentially connected components of: a wastewater storage tank, a microbial anaerobic reactor, a microbial aerobic reactor, an extraction tower and an extraction regeneration tower. With the method and the device provided by the invention, a problem of the difficulty in treating high-concentration sulfate wastewater can be effectively solved; and sulfur in the wastewater can be recovered with high efficiency. Therefore, a novel idea is provided for solving the problem of industrial sulfur-containing wastewater pollution.
Owner:BEIJING CYCLE COLUMBUS ENVIRONMENTAL SCI & TECH
Starch adhesive and preparation method thereof
ActiveCN107779122AImprove water resistanceGood storage stabilityNon-macromolecular adhesive additivesStarch derivtive adhesivesAdhesiveSolvent
The application provides a starch adhesive. The starch adhesive is prepared from the following components in parts by weight: 50 to 150 parts of nanocellulose suspension, 50 to 150 parts of starch, 1to 10 parts of an oxidant, 20 to 80 parts of polyvinyl alcohol, 0.01 to 5 parts of a surfactant and 0.25 to 10 parts of a crosslinking agent. The starch adhesive has good properties including good waterproof performance, good storage stability, excellent initial adhesion, great adhesion, good flowability and good coagulation resistance. The application further provides a preparation method of thestarch adhesive. The preparation method comprises the following steps: (1) preparing the nanocellulose suspension, preparing a polyvinyl alcohol solution and preparing a dialdehyde starch solution; and (2) mixing the dialdehyde starch solution, the nanocellulose suspension, the polyvinyl alcohol solution and the crosslinking agent and stirring and reacting with certain pH value and temperature toprepare the starch adhesive. According to the method provided by the invention, starch and waste paper products are used as raw materials, aldehyde substances are not added in a reaction process and water is used as a solvent; and a production technology and a product have an environment-friendly property and all the raw materials can react sufficiently.
Owner:GUANGDONG YULAN GRP
Motorcade safety management system and method based on ring signature and vehicle management platform
ActiveCN109698754AEnsure safetyPrevent leakageKey distribution for secure communicationPublic key for secure communicationSafety management systemsRing signature
The invention belongs to the technical field of Internet of Vehicles, and discloses a motorcade safety management system and method based on ring signatures, and a vehicle management platform. identity-based ring signatures are performed on the identities of motorcade members on the basis of an elliptic curve. Hiding and public key updating are conducted on identities of motorcade members throughthe elliptic curve, the block chain and the ring signatures, the identities of the message senders are authenticated, and session keys are updated; the block chain is utilized to publish a public keycertificate and a reputation value of the vehicle; The vehicle inquires the public key, the public key validity and the current reputation value of the surrounding vehicles through the roadside unit,so that the addition of malicious vehicles is avoided; Updating of the public key can prevent information from being intercepted and tampered by malicious vehicles when the private key of the user issubjected to security threats. The privacy of registered users and the privacy of motorcade members are effectively prevented from being leaked, and the communication safety of the members in the motorcade is ensured.
Owner:XIAN UNIV OF POSTS & TELECOMM
Database system and a method of data retrieval from the system
InactiveUS20050075999A1Easy searchWithout extra loadData processing applicationsWeb data indexingData retrievalDatabase server
Since metadata pertaining to real data stored in at least one database (DB) are collected and managed at a single meta DB server, and metadata that match a retrieval request are extracted by search of the meta DB server, even when a plurality of DBs and DB servers for managing DBs are present on a network, all metadata that match the retrieval request can be extracted independently of which DBs metadata pertain to. Hence, all data that match a retrieval request can be obtained from a single server independently of the actual locations of the distributed DBs and DB servers.
Owner:NSSOL
Rosuvastatin calcium pharmaceutical composition
InactiveCN103006663AGuaranteed stabilityReduce heat and humidity processOrganic active ingredientsMetabolism disorderMoistureEnergy consumption
The invention provides a rosuvastatin calcium pharmaceutical composition. The rosuvastatin calcium pharmaceutical composition comprises 1.0 to 10.0% of rosuvastatin calcium, 75 to 97.5% of a low-moisture filler, 0 to 5.0% of a dry binder, 1.0 to 5.0% of a disintegrating agent and 0.5 to 5.0% of a lubricant. Through utilization of the low-moisture filler as an auxiliary material in production, rosuvastatin calcium and other auxiliary materials can be mixed uniformly and the mixture is directly compressed into tablets or is subjected to dry granulation tabletting so that introduction of water in wet granulation is avoided; production energy consumption is reduced; product stability is guaranteed; and a cost is reduced.
Owner:YAOPHARMA CO LTD
Embedded microprocessor unclonable function secret key certification system and method
InactiveCN103544410AEasy to useReduce time to assembleProgram/content distribution protectionAnalysis dataElectricity
The invention discloses an embedded microprocessor unclonable function secret key certification system. The embedded microprocessor unclonable function secret key certification system comprises an embedded terminal, a burning equipment terminal and a PC terminal. The embedded terminal comprises a PUF module for extracting data to be analyzed and an IAP module. The burning equipment terminal comprises a module for processing a program to be burned. The PC terminal comprises an embedded certification program generating module, a PUF analysis module, a database module, a hash data generating module and a help data generating module. The PUF module for extracting data to be analyzed is used for extracting primary power-on data in an SRAM repeatedly and transmitting the data to the PUF analysis module. The PUF analysis module is used for analyzing the collected primary power-on data and the size of the sample of the primary power-on data. The PUF analysis module is further used for transmitting an acquired secret key to the hash data generating module and the help data generating module. The embedded microprocessor unclonable function secret key certification system prevents an attacker from decrypting the secret key of embedded equipment through physical attack to copy the whole embedded software, and therefore the copyright of the embedded software is protected.
Owner:HUAZHONG UNIV OF SCI & TECH
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