831results about How to "Avoid joining" patented technology

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

The invention provides a grapheme-polyaniline super capacitor electrode material which refers to a composite electrode material composed of the polyaniline which deposits on the surface of the grapheme in a constant potentials mode. The shape of the polyaniline is self-supporting and is gained by electrolyzing graphite paper. The polyaniline is on the basement of the graphite paper. The preparation comprise a step of connecting the graphite paper with a positive and negative electrode, immersing the graphite paper in the electrolyte with the process of electrolyzation in 5-50 minutes; a step of taking out the graphite paper of the positive electrode which is washed with distilled water and is dried in a vacuum drying oven; a step of regarding a saturated Ag/AgC1 electrode as a reference electrode and a platinum sheet as a auxiliary electrode. The electrolytic graphite paper which is dealt with positive electrode is regarded as a working electrode. The polyaniline is deposited in the mixed solution of aniline and H2SO4, the deposition voltage is 0.5-1.2 V and the polyaniline is deposited for 1-40minutes. The graphite paper is washed by the distilled water and then is dried by putting into the vacuum drying oven after the graphite paper is taken out. The method has the advantages of being simple in preparation technology, low in cost and avoiding effectively the grapheme from overlapping so as to gain a well conductive electrode material.

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.

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.

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.

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.

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.

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.