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Polar code decoder and polar code decoding method based on probability calculation
ActiveCN104079382AImprove throughputDoes not affect the structureError preventionSequence transformationSoft information
The invention provides a polar code decoder and a polar code decoding method based on probability calculation. The polar code decoder comprises a probability sequence transformation module, a successive interference cancellation decoding module and a decision device, wherein the probability sequence transformation module is used for transforming received channel information into a first probability sequence; the successive interference cancellation decoding module is used for performing iteration processing on the first probability sequence based on a decision result of the decision device so as to obtain a second probability sequence and transforming the second probability sequence into a soft information value; and the decision device is used for performing hard decision on the soft information value and returning the decision result to the decoding module. According to the polar code decoder and the polar code decoding method based on probability calculation, the idea of the probability calculation is applied to the design of the polar code decoder, so that the processing delay of the polar code decoder can be reduced, and the total throughput of the polar code decoder can be increased greatly; and meanwhile, the polar code decoder and the polar code decoding method are simple in operation and good in universality and have better practical prospect.
Owner:BEIJING UNIV OF POSTS & TELECOMM
Fiber mat, preparation method and core material for vacuum thermal insulation plate
InactiveCN103306048ALow thermal conductivityHigh strengthFibreboardGlass/slag layered productsGlass fiberPunching
The invention discloses a fiber mat, comprising 50-100 (weight ratio accounting for the dried fiber mat and the same below) glass fiber and chopped strands, and one or more of 0.1-30 inorganic fibers, 0.1-30 natural fibers, 0.1-30 synthetic fibers, 0.1-30 manmade fibers and an anti-radiation material besides the glass fibers and the chopped strands. The fiber mat is prepared by a needle punching method, a spun lacing method, a thermal rolling method, a wet type paper-manufacturing acid process, a wet type paper-manufacturing thickener method, a wet type paper-manufacturing gel method and the like. According to the preparation method for the fiber mat disclosed by the invention, the conductive thermal coefficient of a vacuum thermal insulation plate made of the fiber mat achieves 25-65% under the premise of adopting the same production mode, and a more superexcellent thermal insulation effect is obtained.
Owner:FUJIAN SUPERTECH ADVANCED MATERIAL
Low-temperature heating control method for lithium ion battery
ActiveCN108847513ASolve the problem of poor charge and discharge performanceExtended service lifeSecondary cellsVehicular energy storageElectrical batterySimple component
A low-temperature heating control method for a lithium ion battery includes the following steps: first selecting a capacitive component; connecting the capacitive component and an additional power device in series, and then connecting a switch device in parallel to form a heating control circuit; then sequentially connecting the heating control circuit with the lithium ion battery, two sets of power devices of a motor controller body, and two-phase winding inductance of a electromotor to form a loop; and controlling charge and discharge of the capacitive component and magnetic energy storage and release of the two-phase winding inductance by opening and closing of the switch device and the additional power device to enable an LC oscillating circuit to be formed between the capacitive element and the winding inductance, generating a high-frequency alternating current, generating heat inside the lithium ion battery based on a joule law, and allowing to repeatedly operating the heating process to achieve continuous oscillation and continuous heat production until heating the lithium ion battery to a target temperature. The low-temperature heating control method for the lithium ion battery can be achieved by only adding a simple component to an inherent structure of an electric vehicle, and has the characteristics of good heating effect, high thermal efficiency and low usage cost.
Owner:BEIHANG UNIV
Method for measuring alkali metal atomic polarizability of nuclear magnetic resonance gyro in real time
ActiveCN104833690ADoes not affect the structureEasy to measureAnalysis using nuclear magnetic resonancePolarizabilityProton NMR
The invention provides a method for measuring alkali metal atomic polarizability of a nuclear magnetic resonance gyro in real time and belongs to the field of atomic physics. The method includes: measuring alkali metal atomic densities of an atomic pool at different temperatures, measuring atomic nuclear magnetic resonance frequency of inert gas caused by polarization of alkali metal atoms, and thus acquiring polarizability of the alkali metal atoms in the atomic pool without changing the optical path structure of the nuclear magnetic resonance gyro and the magnetic field environment; building a three-dimensional model of changes in nuclear magnetic resonance frequency of the inert gas in the atomic pool along with temperature and the alkali metal atomic polarizability, measuring the frequency shift of atomic NMR (nuclear magnetic resonance) of the inert gas at any temperature point while the nuclear magnetic resonance frequency normally runs, and thus calculating the polarizability of the alkali metal atoms in the atomic pool in real time. The method has the advantages that the method is simple, no influence is caused to the optical path structure of the nuclear magnetic resonance gyro and the method is of great significance to improving the performance of the nuclear magnetic resonance gyro.
Owner:NAT UNIV OF DEFENSE TECH
Internet of Things based intelligent IDC (Internet data center) computer room monitoring system
ActiveCN103543718ADoes not affect the structureGuaranteed effective data communicationTransmission systemsTransmissionThird partyGeneral Packet Radio Service
The invention relates to an Internet of Things based intelligent IDC (Internet data center) computer room monitoring system which is composed of a sensing layer, a converging layer, a scheduling layer and a corresponding feedback control portion. Data are acquired through various sensors to be transmitted to the converging layer for checking and filtering processing through the sensing layer prior to being transmitted to a control center through a GPRS (general packet radio service) network or an Ethernet network; after the control center receives the environmental data and server status information inside a computer room, the data are analyzed and subjected to periodic processing; if environmental parameters and deviating thresholds are found, a control instruction is sent to the feedback control portion to regulate a computer room environment and server status inside the computer room. Since the control instruction can be accurately issued and processed by means of accurately acquiring, uploading and processing the environment and equipment data information inside the IDC computer room in real time and dynamically regulating the computer room environment and the server status inside the computer room, intelligent monitoring of the environment and equipment inside the IDC computer room is realized, and third-party equipment is enabled to be integrated into an existing system by additional arrangement of a wireless module.
Owner:浪潮创新科技股份有限公司 +1
Anti vocoder compressed end-to-end voice encryption device and method
InactiveCN101026836AReduce processing latencyHigh sound intelligibilityEavesdropping prevention circuitsSpeech analysisTime delayedKey management
Being related to end-to-end safety comm area in global mobile comm system, concretely the invention is related to end-to-end speech sound encryption unit and method of anti vocoder compression realized on traditional voice channel of GSM mobile comm system. The encryption unit is composed of encryption module at sending end and decryption module at receiving end. The encryption module at sending end includes compression module in low code rate (CMLCR) 4, an encryption module, orthogonal multicarrier modulation module (OMMM) 6, first carrier wave generator module (CWGM), first key management negotiation module (KMNM) 8, and first sync module. Decryption module at receiving end includes OMMM 14, second CWGM, decryption module, CMLCR 17, KMNM 18, and second sync module. Through GSM speech sound channel, the invention carries out end-to-end speech sound encryption transmission. Advantages are low time delay, high security, and flexible and convenient.
Owner:SOUTHEAST UNIV
Solar glass self-cleaning antireflection paint and production method thereof
The invention discloses solar glass self-cleaning antireflection paint and a production method thereof. In the solar glass self-cleaning antireflection paint, poly silicon dioxide is used as a main antireflection component, low reflection titanium dioxide is used as an auxiliary antireflection component and a photocatalyst, antimony doped tin oxide, titanium phosphate, silicon phosphate, phosphoric acid and antimony doped tin phosphate are used as a self-cleaning synergist, an antistat and an antireflection membrane enhancer, and deionized water is used as a solvent. The production method comprises the step: a porous silicon dioxide shell generated through ethyl silicate hydrolysis is covered with the anatase titanium dioxide photocatalyst, the antimony doped stannic oxide antistat and other synergist components. The problem that antireflection performance and the self-cleaning performance of conventional solar glass self-cleaning antireflection paint can offset each other is solved, the power generating efficiency of a solar cell can be improved and stabilized greatly, and the maintenance management cost of the solar cell can be reduced.
Owner:TIANJIN VOCATIONAL INST
Display device and manufacturing method thereof
ActiveCN109147595ADoes not affect transmittanceDoes not affect the structureTelevision system detailsColor television detailsTransmittanceDisplay device
The invention discloses a display device and a manufacturing method thereof, comprising: a display module, a photosensitive device, a cover plate and a receiving cavity. The display module includes adisplay area, a first non-display area and a second non-display area. The orthogonal projection of the accommodating cavity on the plane of the cover plate is located in the orthogonal projection of the first non-display area on the plane of the cover plate, and the accommodating cavity penetrates at least a part of the film layer of the display module. The photosensitive device is located in theaccommodating cavity, one side of the photosensitive device facing the cover plate is a first surface, one side of the accommodating cavity facing the first surface is a second surface, a first gap isarranged between the first surface and the second surface, and the first gap is filled with a transparent rubber body. Compared with the prior art, the transparent colloid can effectively reduce thereflection phenomenon in the process of incident light onto the first surface of the photosensitive device through the first gap, and does not affect the transmittance of the light, thereby reducing the visual difference between the area where the photosensitive device is located and other display areas of the display device, and improving the user experience.
Owner:XIAMEN TIANMA MICRO ELECTRONICS
Air sealing body capable of automatically opening air inlets and manufacturing method thereof
ActiveCN101837859ADoes not affect the structureDoes not affect functionalityContainers to prevent mechanical damageHollow articlesEngineeringElectrical and Electronics engineering
Owner:KUNSHAN AIRBAG PACKING CORP
Injecting paste material for administering soil rising of plate-type ballastless track and preparation method and application method thereof
ActiveCN104448207AGel fastFast intensity rise rateBallastwayRailway track constructionAlcoholPlasticizer
The invention provides an injecting paste material for a plate-type ballastless track. The injecting paste material includes a component A and a component B, wherein the component A includes the following materials in parts by weight: 40-80 parts of polyhydric alcohols, 5-10 parts of cross-linking agents, 1-50 parts of plasticizers, 4-20 parts of chain extenders, 1-50 parts of diluents, 0.1-10 parts of curing accelerators, 1-5 parts of antioxygen, 1-5 parts of coupling agents, 0.04-0.2 part of water and 0.5-5 parts of foam stabilizer; the component B includes the following materials in parts by weight: 50-150 parts of isocyanate or isocyanate prepolymers and 1-50 parts of diluents; when temperature changes, a component C or D can be added into the mixture of the components A and B to meet the construction requirements at different temperatures, the solidification strength of the injecting paste material is not influenced by humid environment, and the mechanical properties of the material are excellent.
Owner:CHINA ACADEMY OF RAILWAY SCI CORP LTD +1
Automobile anti-collision automatic buffering device
InactiveCN1478681AWeaken the collision forceSimple structurePedestrian/occupant safety arrangementBumpersAutomatic controlSmart transducer
An automatic buffer unit for preventing collision between cars is composed of a bumper, a collision bar connected to the bumper, spring sleeving on said collision bar, the front and back shearing supporters for said collision bar, and an autocontrolled buffering mechanism consisting of micromotor, drive axle, shear-type balance rods, slide track, elastic rod and intelligent sensor. When an collision will take place, it can automatically ejected out to buffer the collision force.
Owner:刘中青
Antipollution ultrafiltration membrane of amino acid grafting composite cellulose and preparation method thereof
ActiveCN105727760AImprove anti-pollution performanceGood compactnessSemi-permeable membranesMembranesUltrafiltrationCellulose acetate
The invention discloses an antipollution ultrafiltration membrane of amino acid grafting composite cellulose. An ultrafiltration membrane of sodium oxide nanocellulose composite cellulose acetate is adopted as a basic membrane and activated in a solution containing a carbonyl activating agent formed by a condensating agent and amide and is then grafted with amino acid to obtain the antipollution ultrafiltration membrane, the chemical general formula of the amino acid is NH2-R-CH(NH2)-COOH, wherein R is an alkyl chain. The preparation method comprises the steps: preparing a primary membrane casting solution; preparing a composite cellulose membrane casting solution; preparing a composite cellulose ultrafiltration membrane; activating: activating carbonyl functional groups in the sodium oxide nanocellulose; and grafting: washing the activated composite cellulose ultrafiltration membrane, and soaking in an amino acid solution to obtain the composite cellulose ultrafiltration membrane. The ultrafiltration membrane prepared by adopting the preparation method of the invention has the advantages of good compressive compactness, good antipollution effect, easiness for washing the membrane and the like; and the cellulose is wide in source, low in price, low in cost, wide in application field, easy to degrade and harmless to the environment.
Owner:BEIJING INSTITUTE OF TECHNOLOGYGY +1
A silk fibroin/gelatin stent material based on three-dimensional printing and a preparing method thereof
InactiveCN107041971AGood biocompatibilityImprove biological activityAdditive manufacturing apparatusProsthesisPorosityReticular formation
A silk fibroin / gelatin stent material based on three-dimensional printing and a preparing method thereof are provided. The method includes adding gelatin into a silk fibroin solution to form silk fibroin / gelatin composite hydrogel, extruding the silk fibroin / gelatin composite hydrogel from a syringe needle of a three-dimensional printer, printing according to a stent model having a periodically cyclical cross-shaped network structure with the hydrogel directly curing and molding in a receiving device the temperature of which is 4 DEG C at the same time, and finally performing freeze-drying treatment. The method is simple. Printing and curing are performed simultaneously. The production efficiency is high. No chemical crosslinking agent or curing agent is used. The method and the material are green. Inherent characteristics of raw materials are not influenced. The porosity of the prepared stent material is high and the pore size is proper. The stent material is suitable for cell proliferation and differentiation, has good biocompatibility and biological activity, and meets using requirements of stents.
Owner:YANCHENG INST OF IND TECH
Scrambling non-scrambling transmission flow real-time authenticating device and television device with same
InactiveCN101072334AImprove securityDoes not affect the structurePulse modulation television signal transmissionAnalogue secracy/subscription systemsReal time validationNetwork packet
Security authentication device in realtime for transmission stream with / without scramble installed in set-top box or digital TV includes following units mainly: flow-distribution unit, demultiplexing and data packet recognition and control unit, certificate extraction and authentication unit, digital signature verification unit, control logic unit, and de-scrambling module. The security authentication device in realtime for transmission stream for digital TV possesses following functions: authenticating the received transmission stream for digital TV; de-scrambling the scrambled transmission flow into not scrambled transmission flow decodable by digital TV set; after authenticating not scrambled transmission flow, which is transferred to digital TV directly for playing back. The invention also discloses TV set with security authentication device in realtime for transmission stream for digital TV being installed.
Owner:GRADUATE SCHOOL OF THE CHINESE ACAD OF SCI GSCAS
Black-flow preventer valve in pipeline
The invention discloses a back-flow preventer valve in a pipeline. The back-flow preventer valve in the pipeline comprises a pipe body and valves, wherein the valves are arranged in a pipe cavity. Two valves are designed in the pipe cavity, the width of the middle parts of the valves is greater than the radius of the pipe cavity, and is 1.5-2.5 times the radius of the pipe cavity; the root parts of the valves are thicker than other parts, are arc-shaped and connected with the inner wall of the pipe cavity; free edges of the upper valve and the lower valve face towards the flow direction of the fluid; the valves are light films with elasticity and toughness; and the pipe body is transparent, and the two valves are provided with different colors. The back-flow preventer valve in the pipeline has the advantages that: 1, the two valves are simple and practical, satisfy biomechanics, and can be arranged at a plurality of positions in the same pipe body; 2, down-flow is not affected when the back-flow is prevented; 3, convection of liquid and gas in a drainage pipeline is prevented; and 4, the structure of the pipeline is not affected when the back-flow preventer valve is widely applied to any part of various pipe cavities and pipelines in medical science or non-medical life.
Owner:于秀月 +2
Method for extracting grease from oil-tea camellia seed kernel and recovering saponin and saccharide active substances
ActiveCN101906350AReduce pollutionAvoid processing powerSugar derivativesSteroidsCamellia oleiferaFeed additive
The invention discloses a method for extracting grease from oil-tea camellia seed kernel and recovering saponin and saccharide active substances, comprising the following steps of: (1) crushing and tempering: with hull-removed oil-tea camellia seed kernels as raw materials, crushing and grinding the materials, adding water for uniformly stirring, wherein the quality-volume ratio of the oil-tea camellia seed kernels to the water is 1kg:2-8L and controlling the temperature of the system to be 30-60DEG C; (2) carrying out the enzymolysis: adjusting the pH value of the system to be 3.5-8.0, adding pectinase the weight of which is 0.1-2 percent that of the camellia seed kernels and carrying out the enzymolysis for 2-5h; (3) heating and centrifuging: treating the system at the temperature of 80-90DEG C for 5-15min after enzymolysis; and (4) recovering the grease and the active substances: in which, the centrifuged and separated system comprises boiled oil, liquid phase and residue, taking out the boiled oil and spray-drying the liquid phase to obtain the active substances containing the saponin and saccharide. The method for extracting the grease avoids the high-temperature pretreatment of high-temperature enzymolysis of oil materials and can be used for synchronously recovering oil and a saponin and saccharide mixture which can be used as a saponin crude product or a feed additive.
Owner:ACAD OF NAT FOOD & STRATEGIC RESERVES ADMINISTRATION
Safety certification device for digital TV signal, and TV equipment with the device
InactiveCN1874487AImprove securityDoes not affect the structureUser identity/authority verificationAnalogue secracy/subscription systemsData streamTransfer procedure
The invention comprises: a digital signature extracting unit, a license extracting and examining unit, a digital signature examining unit, a data stream dividing unit and a controlling unit. The invention can prevent the illegal programs inserted into the digital programs by illegal user, and improve the security of digital TV broadcast.
Owner:INST OF INFORMATION ENG CAS
Method, system and customer equipment obtaining key frame in stream media service
ActiveCN101383959AImprove experienceMinor changesPulse modulation television signal transmissionTwo-way working systemsKey frameMedia server
The invention discloses a method, a system and user equipment for obtaining key frames in streaming media services. Threshold time for receiving the key frames is set; a client receives video data from a streaming media server and analyzes the video data; when the network is in a normal state, and if the client does not receive a video key frame in the threshold time, a request for adjusting the generating frequency of the video key frame is sent to the streaming media server; and the streaming media server judges the received request and adjusts the generating frequency of the video key frame according to the request of the client. The application of the invention solves the problem that a user can fastest see clear video images when watching programs so that the user experience of the whole service is advanced at the larger limit.
Owner:ZTE CORP
Charging pile image acquisition system and method of recognizing vehicle identity information by image acquisition
InactiveCN106828169AReduce volumeWith lightning protectionCharging stationsElectric vehicle charging technologyCommunication interfaceCharge control
The invention discloses a charging pile image acquisition system and a method of recognizing vehicle identity information by image acquisition; the charging pile image acquisition system comprises a charging pile and a vehicle identity auto-recognition system embedded in the charging pile; the vehicle identity auto-recognition system is connected to an information interface of the charging pile through a vehicle identity auto-recognition system communication interface; the vehicle identity auto-recognition system comprises an auto-recognition module and a camera, the signal output end of the camera is connected with the auto-recognition module, and the input end of a charging control module in the charging pile is connected to a cloud server. Recognizing is achieved herein by combining vehicle identity auto-recognition technology and the charging pile, the camera is mounted on a body of the charging pile at specific height, and the auto-recognition system is added in the body. The camera side of the charging pile faces a parking space during mounting of the charging pile. The camera used herein is small in size and is friendly to the integral structure of the charging pile; the charging pile image acquisition system has the advantages of good waterproofing property, lightning protection, good dustproof property, good antistatic property and the like.
Owner:广州爱电牛互联网科技有限公司
Novel high-temperature superconducting cable with built-in optical fiber and manufacturing method thereof
PendingCN109659088AGuaranteed safe operationDoes not affect the structureSuperconductors/hyperconductorsThermometers using physical/chemical changesElectrical conductorHigh temperature superconducting
An embodiment of the invention provides a high-temperature superconducting cable with a built-in optical fiber. The high-temperature superconducting cable comprises a cryostat, a shielding layer, an outer insulating layer, at least one conductor layer, an inner insulating layer, and a cable framework from outside to inside, wherein liquid nitrogen fills between the cryostat and the shielding layerand fills in the cable framework; each conductor layer is formed by winding a plurality of high-temperature superconducting tape materials spirally; a carbon paper layer is laid between different conductor layers; and a temperature measuring optical fiber is at least laid in a gap between two adjacent high-temperature superconducting tape materials in one conductor layer. The invention further provides a corresponding manufacturing method. By implementing the novel high-temperature superconducting cable and the manufacturing method thereof, the temperature distribution along the cable conductor layers can be directly detected since the temperature measuring optical fiber is in direct contact with the superconducting cable conductor layers; meanwhile, the temperature measuring optical fiber is small in size and installed between the superconducting tape material gap, does not affect the cable body structure, does not affect the cable insulation performance, and is not subject to electromagnetic interference.
Owner:SHENZHEN POWER SUPPLY BUREAU
Equalization circuit realizing parallel charging and selective single cell battery equalization discharge and control method thereof
ActiveCN108583347AReduce inconsistencyDoes not affect the structureCharging stationsConverter typesMOSFETElectrical battery
The invention relates to an equalization circuit realizing parallel charging and selective single cell battery equalization discharge and a control method thereof. The equalization circuit is composedof a battery pack, a DC / DC converter, Mosfet switches with anti-parallel diodes, a bus switch K1, a bus switch K2, a bus switch P1, a bus switch P2, a switch Q1, a switch Q2, a switch Q3 and a switchQ4. The equalization circuit can realize parallel charging, when any single cell battery reaches the set cutoff voltage, the single cell battery is isolated from a charging circuit, finally all single cell batteries are stopped charging when reach the set charging cutoff voltage, and the forced balance purpose is achieved. According to the equalization discharge, the battery pack is connected tothe DC / DC converter in parallel to perform equalization on the single cell battery with the lowest state of charge (SOC) in the battery pack. During discharging, the inconsistency between all the single cell batteries can be effectively reduced.
Owner:KUNMING UNIV OF SCI & TECH
Method for passivating films shielded by etching adhesive through fluorine-based gas
ActiveCN103903964AEasy to removeGood anisotropySemiconductor/solid-state device manufacturingOriginals for photomechanical treatmentChemistryPhotoresist
The invention discloses a method for passivating films shielded by etching adhesive through fluorine-based gas. The method comprises the steps that a lamination of a material to be etched is coated with photoresist spirally and photo-etched, an obtained adhesive stand with a vertical side wall is used as an etching mask, and preparation of a sample to be etched is achieved; the sample to be etched is subjected to normal-temperature etching; the sample to be etched after normal-temperature etching is subjected to high-temperature normal-position over etching to remove polymers on the surface of the sample to be etched. By means of the method, the advantages that normal-temperature etching is good in anisotropy, etching parameters are convenient to control, high-temperature etching can conveniently remove the polymers and other residue are utilized, so that the vertical side wall without residual polymer is obtained, no more process is needed, and the method is compatible with a traditional silicon-based semiconductor process.
Owner:INST OF MICROELECTRONICS CHINESE ACAD OF SCI
Graphene composite fiber yarn, preparation method and application thereof
ActiveCN109402815AGood spinnability and continuityGood spinnabilityArtificial filaments from viscoseYarnIonYarn
The invention provides a graphene composite fiber yarn and a preparation method and application thereof. The method comprises the steps of dispersing graphene in deionized water to obtain a graphene dispersion; mixing a viscose with the graphene dispersion to obtain a spinning glue; conducting wet spinning on the spinning glue to obtain a graphene composite fiber; conducting spinning on the graphene composite fiber to obtain a graphene composite fiber yarn. The preparation method can prepare the graphene dispersion with high concentration and stable dispersion, the crystal structure of the graphene is complete, the spinnability is good when spinning with the glue, the spinning quality is high, and convenience is provided for the graphene composite fiber yarn to be widely used in the textile field.
Owner:福建祥业生物工程技术有限公司
High-precision measuring method of separating characteristic of hot work separating device
InactiveCN101907444AEasy to installImprove measurement performanceAcceleration measurementUsing optical meansStandard uncertaintyHot work
The invention provides a high-precision measuring method of the separating characteristic of a hot work separating device, which gives consideration to the simple installation of a measuring structure, the safety and reliability of a measuring system and the high measuring precision. The uncertainty of the relative standard of the measuring system which is matched with the method is 0.184%. Compared with the conventional method, the measuring performance is more stable and the measuring precision is higher. The method not only can measure the displacement-time relationship, the separating time, the separating speed, the separating acceleration and the separating impulse of the hot work separating device with high precision, but also can be widely applied to measuring the motion characteristic of the motion parts of the other work done hot work product, and has good application foreground for accurately testing and researching the separating motion characteristic of the hot work separating device.
Owner:BEIJING INSTITUTE OF TECHNOLOGYGY
Chiral-separation solid membrane grafted by chiral identification body through dopamine pretreatment, and making method thereof
ActiveCN103585903AEasy to chemically modifyImprove hydrophilicitySemi-permeable membranesOptically-active compound separationPre treatmentDopamine
The invention belongs to the technical field of polymer membrane materials, and discloses a chiral-separation solid membrane grafted by a chiral identification body through dopamine pretreatment, and a making method and an application thereof. The method includes the following concrete steps: 1, immersing a solid membrane in a dopamine solution, stirring for reacting, and flushing with clear water; and 2, immersing the flushed solid membrane in a solution of the chiral identification body, heating for reacting, washing, and carrying out vacuum drying to obtain the chiral-separation solid membrane grafted by the chiral identification body through dopamine pretreatment. Firm and stable fctive function groups comprising -NH2, -OH and -C=O are introduced to the surface of the solid membrane through the above immersion technology; and chiral recognition sites are introduced to the surface of the solid membrane through the above immersion technology without influencing the structure or performances of the membrane, so the chiral-separation solid membrane grafted by the chiral identification body through dopamine pretreatment can be used for the effective separation of racemes The making method has the advantages of realization of the implementation of above reactions in an aqueous solution for a whole course, and mild and unharsh reaction conditions, development of the modification selectivity of the solid membrane, simple process, and easy realization of the industrialized batch production.
Owner:GUANGZHOU CHEM CO LTD CHINESE ACADEMY OF SCI
Blood-purifying adsorbent for clearing blood bilirubin and preparation method thereof
ActiveCN103055822AGood blood compatibilityImprove adsorption capacityOther blood circulation devicesOther chemical processesMethacrylateSorbent
The invention discloses a blood-purifying adsorbent for clearing blood bilirubin and a preparation method thereof. The blood-purifying absorbent is fixed on a solid-phase carrier by adopting methacrylate biquaternary ammonium salt as aglucon through a chemical grafting method or a physical film-coating method, wherein the solid-phase carrier is a polymeric adsorbent. Correspondingly, the invention discloses a preparation method of the blood-purifying adsorbent for clearing blood bilirubin. According to the blood-purifying adsorbent disclosed by the invention, methacrylate biquaternary ammonium (PDQ for short) is adopted as the aglucon, so that not only can the special capacity for absorbing bilirubin be achieved, but also the compatibility of the adsorbent is remarkably improved. Meanwhile, the physical and chemical properties are stable, and the cost is relatively low.
Owner:佛山市博新生物科技有限公司
Three-electrode device of cylindrical battery and assembling method thereof
ActiveCN106099164ADoes not affect the structureEasy to makeFinal product manufactureSecondary cells manufactureEngineeringLithium-ion battery
The invention provides a three-electrode device of a cylindrical battery and an assembling method of the three-electrode device of the cylindrical battery. The three-electrode device comprises a shell body, positive plates, negative plates, diaphragms, an upper mould, a lower mould, a reference electrode and a reference electrode column, wherein the diaphragms are respectively clamped between each layer of the positive plates and each layer of the negative plates, and the positive plates, the negative plates and the diaphragms are together encircled and rolled into a cylindrical roll core, and the cylindrical roll core is filled with an electrolyte; the cylindrical roll core is mounted in the shell body, the lower mould is mounted at an opening of the shell body, the tail end of the reference electrode column is inserted into a cavity in the center of the cylindrical roll core from the center hole of the lower mould, the reference electrode is mounted at the tail end of the reference electrode column, and the upper mould is fixed on the lower mould trough screwing screw threads. The three-electrode device of the cylindrical battery and the assembling method of the three-electrode device of the cylindrical battery disclosed by the invention aim at avoiding the defects of the three-electrode device such as complicated structure, low capacity, poor reference and bad sealing in the prior art, and further fill up the blank of three-electrode systems of cylindrical lithium ion batteries.
Owner:辽宁九夷锂能股份有限公司
Bionic biomineralized artificial bone repair material as well as preparation method and application thereof
ActiveCN107952115ADoes not affect the structureDoes not affect bone formationPharmaceutical delivery mechanismTissue regenerationLinking collagenNano hydroxyapatite
The invention provides a bionic biomineralized artificial bone repair material as well as a preparation method and an application thereof. The material consists of a cross-linked collagen matrix and biomineralized collagen / hydroxyapatite composite powder dispersed in the matrix, wherein the mass ratio of the collagen matrix to the biomineralized collagen / hydroxyapatite composite powder is (9-1) to(1-9). The bionic biomineralized artificial bone repair material provided by the invention is a collage-based bionic biomineralized artificial bone, which can meet a demand of artificial bone and tissue suturing in a clinical GTR or GBR operation; the artificial bone repair material consists of hydroxyapatite and pure collagen, and the two ingredients are major ingredients of human natural tissues, so that the artificial bone repair material is free from toxicity; and influence to a material structure and an osteogenesis effect is avoided, and good biocompatibility is guaranteed. Due to the existence of the cross-linked collagen matrix, problems of a material which can get dispersed easily, and is too high in degradation speed, poor in mechanical performance and the like can be solved; and the bionic construction of nano-hydroxyapatite and collagen is achieved.
Owner:BEIJING PAISHENG BIOTECH CO LTD
Plant extraction-agronomic regulation and control combined remediation method for alkalescent heavy metal contaminated farmland soil
InactiveCN111299316AIncrease profitDoes not affect the structureSolid waste disposalContaminated soil reclamationSoil scienceSoil heavy metals
The invention relates to a plant extraction-agronomic regulation and control combined remediation method for alkalescent heavy metal contaminated farmland soil. According to the method, soil in a to-be-remediated area is pretreated; hyperaccumulation plants are planted once or multiple times until the soil heavy metal content in the to-be-remediated area meets a remediation target value; after thesoil is retreated, low-accumulation crops of target heavy metals are planted; edible parts are harvested after maturation, the content of heavy metals is detected, the crops can be edible or sold inthe market if meeting a standard, otherwise, harmless treatment is performed; and a plurality of low-accumulation crops are planted by adopting different agronomy regulation and control, and the low-accumulation crops with the edible parts meeting the standard are screened out for long-term planting in different seasons. According to the invention, the method has the advantages of synchronous achieving of restoration, production and earning, simplicity, high efficiency, high soil utilization rate, thorough restoration, long maintenance time, no potential risk, no influence on the structure andphysicochemical properties of soil, and realization of long-term planting of heavy metal low-accumulation crops meeting standards according to actual conditions in a time-sharing manner, so the quality and the yield of the crops are guaranteed.
Owner:中节能大地环境修复有限公司
Surface anticorrosive antifouling coating using polydopamine as base layer as well as modification method and application of coating
InactiveCN110643277ASimple preparation techniqueEasy to manufactureAntifouling/underwater paintsPaints with biocidesPolymer scienceHydrolysate
The invention relates to a surface anticorrosive antifouling coating using polydopamine as a base layer as well as a modification method and application of the coating. Dopamine, 3-aminopropyltriethoxysilane (APTES), and a superhydrophilic polymer (PHiG) containing epoxy groups or a superhydrophobic polymer (PHoG) containing epoxy groups are subjected to a layer-by-layer reaction on the surface ofa substrate to form the ternary composite coating. The method comprises the following steps: immersing the surface of the substrate (SS) in a Tris-HCl buffer solution of the dopamine to obtain polydopamine surface coating SS@PDA; immersing the SS@PDA in a hydrolysate of the APTES to further form organic silicone surface coating SS@PDA / Si at the surface; and immersing the SS@PDA / Si in a phosphatebuffer solution of the PHiG with a pH of 7.4 or an ethyl acetate solution of the PHoG to further modify the surface of the substrate by a polymer to obtain the composite coating SS@PDA / Si / PHiG or SS@PDA / Si / PHoG. The coating is suitable for anticorrosive antifouling modification of a plurality of surfaces.
Owner:TIANJIN UNIV
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