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120results about How to "Solve performance deficiencies" patented technology
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Steel plate surface treatment method and device
ActiveCN104056865AImprove cleanlinessReduce loadWork cleaning devicesMetal rolling arrangementsProcess functionSheet steel
An apparatus for treating a surface of a steal plate, sequentially comprising: a strip steel surface treatment unit (1) provided with a high-pressure ejection device (1-1) or a centrifugal throwing device (1-2), a strip steel surface cleaning unit (2), and a strip steel surface drying unit (3), one or both of the high-pressure ejection device and the centrifugal throwing device being arranged, and slurry, namely a mixture of solid abrasive and water, being sprayed onto the surface of the strip steel; and further comprising a slurry supply unit (4) and an abrasive filtering and recovery unit (5). Also disclosed is a method for treating a surface of a steal plate. In the treatment method, by spraying the solid mixed abrasive onto the surface of the strip steel, the surface roughness of the strip steel is controlled, and further, the oil, iron oxide scales and some dirty things on the surface of the strip steel can be cleared, thereby fully or partially replacing the smoothing process function.
Owner:BAOSHAN IRON & STEEL CO LTD
Internet of Things message service system
ActiveCN106534107AImprove availability and throughputRealize long-term non-stop operationResource allocationTransmissionLarge scale dataComputer science
The invention provides an Internet of Things message service system, including a gateway service module used for maintenance and guarantee of connection between the system and a terminal, a queue service module used for data buffering and persistence and data pretreatment, and a configuration service module used for configuration and edition of customized protocols, configuration and definition of data structures and maintenance of configuration files. The Internet of Things message service system can adapt to message service under various conditions, improve the availability and the throughput in large-scale data broadcasting, and achieve long-time non-stop operation.
Owner:NORTH CHINA UNIVERSITY OF TECHNOLOGY
Efficient roll forming method for large medium-thickness-plate conical cylinder
Owner:YUNNAN HEAVY EQUIP MFG GRP
Method for realizing neighbour discovery
The present invention discloses neighbor discovery implementation method, used for realizing terminal equipment inter communicate in router accessing non-broadcast multipoint access network. It contains presetting corresponded neighbor state interface index in routing list host computer route; receiving neighbor discovery message; according to neighbor discovery message source and target IP address searching corresponded interface index in routing list, and according to interface index obtaining corresponded neighbor state; according to neighbor discovery message source and target IP address and corresponded neighbor state, to make neighbor discovery processing to received neighbor discovery message. The present invention avoids performance insufficient to and regular traffic message lose problem, raising equipment service treatment ability.
Owner:HUAWEI TECH CO LTD
Inorganic material-modified phenolic foam insulation material with low water absorption and preparation method thereof
An inorganic material-modified phenolic foam insulation material with low water absorption and a preparation method thereof are disclosed. According to the invention, 0.1-50 parts by weight of an inorganic modifier with the surface coated by a water repellent, 1-10 parts by weight of a coupling agent, 3-15 parts by weight of an organic modifier, 2-18 parts by weight of a foaming agent, 6-20 parts by weight of a curing agent and 0-5 parts by weight of a powdery water repellent are added into 100 parts by weight of foamable phenolic resin. The preparation method provided by the invention comprises the following steps: uniformly mixing the foamable phenolic resin, the inorganic modifier processed by surface hydrophobic treatment, the coupling agent, the organic modifier, the foaming agent, the curing agent and the powdery water repellent, foaming at 18-90 DEG C, curing, carrying out thermal insulation for 2-18 h, standing at room temperature for 7-20 days, and slaking to obtain the inorganic material-modified phenolic foam insulation material with low water absorption. The foam material provided by the invention has fine and uniform cells and high porosity by closed pore. In addition, a light inorganic material undergoes hydrophobic cover treatment so as to achieve the purpose of reducing water absorption of the material.
Owner:CHINA BUILDING MATERIALS ACAD
Processing method and system for file system access
ActiveCN103077243ASolve performance deficienciesFix compatibility issuesSpecial data processing applicationsComputer compatibilityTime overhead
The invention discloses a processing method and system for file system access. The method comprises the steps that an operation request message from a user forwarded by an input and output manager is received by a file filter driver, wherein the file filter driver is pre-arranged between the input and output manager and a file system driver; whether the operation request message meets a preset filter condition is judged by the file filter driver, the operation request message is sent to a user layer agent program for processing under the condition that the judgment result is yes, and otherwise, the operation request message is sent to the file system driver for processing. According to the method and the system disclosed by the invention, the effects that the system performance is improved, extra time consumption is reduced and the system compatibility is enhanced are achieved.
Owner:SUMAVISION TECH CO LTD
Message transmission method, device and system
ActiveCN106101617ARealize load sharingHeavy processing workloadClosed circuit television systemsNetworks interconnectionVideo monitoringComputer hardware
The invention provides a message transmission method, device and system. The method comprises the steps of sending a first message to a slave VPN (Virtual Private Network) server by employing a source address after the first message from an export device is received, thereby enabling the slave VPN server to unpack the first message; sending a second message to a management server by employing a destination address after the second message from the slave VPN server is received, thereby enabling the management server to carry out service processing on the second message; sending a third message to the slave VPN server by employing the destination address after the third message from the management server is received, thereby enabling the slave VPN server to package the third message; and sending a fourth message to the export device by employing the destination address after the fourth message from the slave VPN server is received, thereby enabling the export device to forward the fourth message to a video device. Through adoption of the technical scheme of the method, the device and the system, the processing performance of each VPN server can be improved, and the integrated performance of a video monitoring system can be improved.
Owner:ZHEJIANG UNIVIEW TECH CO LTD
Degradable multi-layer Mg/Zn composite material for medical use and preparation method thereof
ActiveCN111450322ALow elastic modulusGood biocompatibilitySurgeryPharmaceutical delivery mechanismCardiovascular stentMg alloys
The invention provides a multi-layer Mg / Zn laminated composite material for medical use and a preparation method thereof. The composite material comprises composite layers and base layers, wherein thecomposite layers are made of pure magnesium or magnesium alloy; and the base layers are made of a corrosion-resistant, high-strength and high-plasticity zinc alloy for medical use. The magnesium composite layers are arranged in an ordered manner according to self-corrosion potential, so that corrosion laterally develops layer by layer and strong galvanic corrosion between the magnesium layers andthe zinc layers is prevented. In addition, through the magnesium composite layers, the composite material has a lower elasticity modulus than zinc, and the stress shielding effect is effectively mitigated. The composite material has good biocompatibility of the magnesium and excellent mechanical property of the zinc. When implants, such as a bone screw, a bone plate and a stent prepared from thecomposite material play a medical role after being implanted, the zinc base layer bears more than 50% of load. In the early stage after implantation, the magnesium composite layers are in direct contact with bone tissues and promote the growth and healing of the bone tissues or recirculate blood as cardiovascular stents. Finally, the composite material is completely degraded in vivo, and the complete degradation time is 8-18 months.
Owner:UNIV OF SCI & TECH BEIJING
Mobile terminal and method of run application thereof
ActiveCN106339061AAvoid underperformanceExtended service lifePower supply for data processingDigital output to display deviceImage resolutionDisplay resolution
The invention discloses a mobile terminal and a method of run application of the mobile terminal. The mobile terminal comprises an application management module, a to-be-displayed image generating module and a resolution ratio regulation module, wherein the application management module is used for setting corresponding display resolution for the application according to the user instructions; the to-be-displayed image generating module is used for running the application to generate to-be-displayed images after the application is started; and the resolution ratio regulation module is used for regulating the resolution ratio of the to-be-displayed images, so that the resolution ratio of the regulated to-be-displayed images is in accordance with that of a display screen. According to the invention, and the application can run smoothly in an operating system with corresponding resolution ratio, so that the disadvantage that the service life of the mobile terminal is shortened due to the performance defects caused by the reason that the application of the mobile terminal runs under the condition of improper resolution ratio can be prevented, and the to-be-displayed images can be displayed in the display screen normally.
Owner:HUAWEI TECH CO LTD
Electric vehicle charging harmonic wave identification method based on wavelet transform
InactiveCN106908663AOvercoming the disadvantage of smoothing outDirectional selectivitySpectral/fourier analysisTime domainHarmonic
Owner:STATE GRID JIANGSU ELECTRIC POWER CO ELECTRIC POWER RES INST +2
Method, device and system for achieving flow management
ActiveCN103179044ASolve performance deficienciesSolve densityNetworks interconnectionTraffic capacityMirror image
The invention relates to a method, device and system for achieving flow management. The achieving method includes: building a corresponding relation between user's demands and external devices; distributing hardware addresses (MAC addresses) relative to the external devices for all the external devices, and performing corresponding binding on switchboard ports; and receiving messages, and sending the messages to the external devices corresponding to the messages in a mirror image or redirection mode. A switchboard is added between an information transfer module (ITM) device and the external devices so as to enable the ITM to be capable of being connected with more external devices, and therefore the method, device and system for achieving the flow management can perform different processing on different flow, and simultaneously solves the problem that performances of the external device are insufficient and density of the ITM is not enough. Furthermore, the MAC addresses are bound to different ports through the switchboard, the method, device and system for achieving the flow management achieves various different requirements of a user correspond to the external devices with various different functions and sends the messages in the mirror image or redirection mode.
Owner:BEIJINGNETENTSEC
Test case selecting and expanding method facing network application system
ActiveCN104899141ASolving problems with a lot of redundancyHigh fault detection performanceSoftware testing/debuggingSpecial data processing applicationsRegression testingStudy methods
The invention relates to a test case selecting and expanding method facing a network application system. A novel test case set with a relatively high fault detecting efficiency is finally generated by virtue of a TTCN-3 testing standard by the following steps: analyzing the test case set; carrying out elimination of redundancy; and training the test data by virtue of a machine learning method and the like. By the aid of the method provided by the invention, the problems that the test cases have a lot of redundancy, the test cases in a regression test are multiplexed, the test behaviors in the test cases are compactly coupled with the test data and the test cases have a scarce capacity of enhancing the performance of the network application system are solved.
Owner:BEIHANG UNIV
Urea production process of high-efficiency condensation, low-mounting height CO2 air stripping method and high-voltage lamp type full condensation reactor
ActiveCN101492398AProcess modification is simpleLess investmentUrea derivatives preparationOrganic compound preparationChemistryUrea
The invention discloses a CO2-stripping process for urea with efficient condensation and low installation height and a high pressure tube condensation reactor. Problems of a traditional urea process are solved, including high civil construction framework, high device investment and hard operation, management and maintenance. With the specific high pressure tube condenser adopted, gas and liquid are separated, unreacted gas in the high pressure tube condensation reactor is directly sent to a scrubber, and simultaneously reacted liquid is sent to a synthesizing tower by a high pressure ejector. Compared with the traditional urea civil construction framework, the height of the framework of the process is lowered by 20-25m. The process has the advantages of simple modification, energy-saving property, lowered energy consumption, lowered investment, convenient operation and convenient maintenance and overhauling.
Owner:WUHUAN ENG
Computing task unloading method and system, electronic equipment and storage medium
ActiveCN112422644ASolve performance deficienciesOptimal unloading strategyNeural architecturesTransmissionEdge serverMobile Web
The embodiment of the invention provides a computing task unloading method and system, electronic equipment and a storage medium, and the method comprises the steps: sending a computing task unloadingrequest so that a candidate executor computes the candidate executor resource distribution information of a target through an evolutionary algorithm after receiving the computing task unloading request; acquiring the state information of the current mobile network; based on the state information of the current mobile network, making an unloading decision according to an unloading decision algorithm model; unloading the computing task based on the unloading decision, wherein the unloading decision algorithm model is obtained by training based on state information of a mobile network, the stateinformation of the current mobile network comprises unloading task information, edge server information associated with a requester and the candidate executor resource allocation information. According to the computing task unloading method provided by the invention, the flexibility of computing task unloading and the accuracy of decision making can be improved, and the extra overhead of the communication node in the task unloading and executing process is effectively reduced.
Owner:BEIJING UNIV OF POSTS & TELECOMM
Isothermal quenching nodular cast iron as well as preparation method and application thereof
InactiveCN110952031ASolve the deformationSolve problems such as substandard performanceFoundry mouldsProcess efficiency improvementAustemperingDuctile iron
The invention relates to isothermal quenching nodular cast iron as well as a preparation method and application thereof. The isothermal quenching nodular cast iron is prepared from the following components of, in percentage by weight, 3.60%-3.75% of C, 2.30%-2.50% of Si, 0.20%-0.40% of Mn, less than or equal to 0.06% of P, less than or equal to 0.03% of S, 0.70%-0.80% of Cu, 0.10%-0.20% of Mo, 0.03%-0.06% of Mg, and the balance Fe; and the preparation method of the isothermal quenching nodular cast iron comprises the following steps that (1) nodulizing inoculation is conducted on molten iron by adopting a pouring nodulizing method, pouring is conducted after the inoculation is completed, and after pouring is completed and cooling is conducted, the nodular cast iron is obtained; and (2) thenodular cast iron obtained in the step (1) is sequentially subjected to preheating, austenitizing and salt bath quenching, and the isothermal quenching nodular cast iron is obtained after the salt bath quenching is completed. According to the isothermal quenching nodular cast iron as well as the preparation method and the application thereof, the problems that the performance of an axle housing does not reach the standard and the like when the isothermal quenching nodular cast iron material is used for integrated manufacturing are solved, and efficient utilization of the isothermal quenchingnodular cast iron in the integrated axle housing is achieved.
Owner:CHINA FIRST AUTOMOBILE +1
Method and equipment for forwarding datagram based on NAT 64 (Network Address Translation 64)
InactiveCN103634216ASolve performance deficienciesImprove performanceData switching networksConnection tableNetwork addressing
The invention provides a method and equipment for forwarding a datagram based on NAT 64 (Network Address Translation 64). The method and the equipment are used for solving the problems in the prior art that most of the content of the Internet is available to IPv4 (Internet Protocol version 4) only, the condition that IPv6 (Internet Protocol version 6) terminal users often need to access IPv4 content is unavoidable, the conversion of the network addresses and protocols of the IPv6 and IPv4 under the protocols of TCP (transmission control protocol), UDP (User Datagram Protocol) and ICMP (Internet Control Message Protocol) is realized by a NAT 64 technology designed by an IETF (Internet Engineering Task Force), however, forwarding equipment realizes the conversion of the network addresses and protocols mainly through traversing an address mapping table in a current NAT 64 implementation mode, and in the case of a large number of users, the searching efficiency is low, the system resource occupation is too large, and then the performance can be lowered seriously. According to the method and the equipment, the efficiency of converted address searching during the intercommunication between the IPv4 and the IPv6 is greatly increased through establishing an IPv4 and IPv6 mixed connection table and searching in a Hash manner, and then, the overall performance is improved.
Owner:OPZOON TECH
Multi-input direct-current modular electrical system and control method thereof
ActiveCN104734140ASolve the problem of energy allocationSolve performance deficienciesDc source parallel operationMulti inputLow voltage
The invention provides a multi-input direct-current modular electrical system and a control method thereof. The multi-input DC modular electrical system comprises two or more AC / DC modules and two or more DC / DC modules. The AC / DC modules are connected in parallel. The input ends of the AC / DC modules are connected with an external AC power source. The output ends of the AC / DC modules are connected with DC buses. The output end of each AC / DC module outputs DC high voltage. The AC / DC modules are in communication connection. The input ends of the DC / DC modules are connected to the output ends of the AC / DC modules through the DC buses. The output ends of the DC / DC modules are used for being connected with DC low-voltage loads. The output ends of the DC / DC modules output DC voltage. According to the multi-input direct-current modular electrical system and the control method thereof, multiple rectifying modules are controlled, the capacities of the multiple modules are deployed, in this way, energy deploying of multi-input rectifying modules is achieved, and the multi-input rectifying modules can share the buses; the problem that when the load of a direct-current electrical system is increased, the front-end rectifying module system is insufficient in capacity is solved; energy deploying of multiple rectifying modules is achieved.
Owner:GREE ELECTRIC APPLIANCES INC
Subspace clustering method and device for potential low-rank representation
InactiveCN111310813AImprove robustnessImprove performanceCharacter and pattern recognitionComplex mathematical operationsSpatial clusteringAlgorithm
The invention discloses a subspace clustering method and device for potential low-rank representation, and the method comprises the steps: obtaining data, and carrying out the preprocessing of the data, and obtaining a feature matrix; potential low-rank representation subspace clustering of an unobserved data sample is considered, a Schatten-p norm is used as a regular term to replace a rank function, and a problem that an NP is difficult to solve is converted into a solvable problem; introducing an lp norm constraint error term to construct a potential low-rank representation subspace clustering optimization objective function; then solving the optimization objective function to obtain a low-rank representation matrix; calculating an affinity matrix based on the low-rank representation matrix; and calculating and segmenting the affinity matrix by using a spectral clustering algorithm to realize potential low-rank representation subspace clustering of the data. According to the method,the problems that low-rank representation samples are insufficient and rank functions are difficult to solve are solved, the robustness of potential low-rank representation subspace clustering is enhanced, and the performance of potential low-rank representation subspace clustering is improved.
Owner:GUANGDONG UNIV OF TECH
Ultrahigh-definition video layered coding and decoding method supporting efficient editing
ActiveCN113271467ASolve performance deficienciesEfficient editingDigital video signal modificationParallel computingImage scale
Owner:CHENGDU SOBEY DIGITAL TECH CO LTD
Air conditioner
ActiveCN101495816ASolve performance deficienciesOvercapacityMechanical apparatusSpace heating and ventilation safety systemsRoom temperatureEngineering
Owner:DAIKIN IND LTD
Moisture-curing polyurethane hot melt adhesive with excellent oil resistance and preparation method of moisture-curing polyurethane hot melt adhesive
InactiveCN109679559AImprove oil resistanceImprove compatibilityNon-macromolecular adhesive additivesPolyureas/polyurethane adhesivesFunctional monomerChemistry
The invention discloses a moisture-curing polyurethane hot melt adhesive with excellent oil resistance and a preparation method of the moisture-curing polyurethane hot melt adhesive. The moisture-curing polyurethane hot melt adhesive is characterized by being prepared from 1-35 parts of polyether diols, 1-40 parts of liquid polyester diols, 1-60 parts of crystalline polyester diols, 1-45 parts ofa polyacrylic acid fluorine-containing copolymer, 1-50 parts of isocyanate, 0.1-2 parts of a catalyst, 0.1-3 parts of an antioxidant and 0.1-4 parts of a silane coupling agent. Poly(dodecafluoroheptylmethacrylate-random-methyl methacrylate-random-octadecyl methacrylate-random-hydroxyethyl methylacrylate) is synthesized firstly and added to a polyurethane prepolymer reaction, a hydroxy-containingacrylic acid functional monomer enables the polyacrylic acid fluorine-containing copolymer to partially participate in the polyurethane prepolymer synthesis reaction, a fluorinated acrylate copolymerchain segment is introduced, by means of an efficient synergistic effect of the formula, the hot melt adhesive shows better compatibility, composition and content of other raw materials are further adjusted, and therefore, oil resistance of the polyurethane hot melt adhesive is improved.
Owner:SHUNDE POLYTECHNIC
Two-stage mass-flow oblique flow compressor with stage intercooling
ActiveCN105275853AMeet needsOvercome first-level design difficultiesPump componentsPump installationsOff designEngineering
The invention discloses a two-stage mass-flow oblique flow compressor with stage intercooling. The two-stage mass-flow oblique flow compressor comprises two stages of oblique flow compressor bodies, and an interstage cooler is connected between the stages. The two-stage mass-flow oblique flow compressor is characterized in that an oblique flow impeller with obvious axial characteristic at the front end and the blade top large curvature characteristic at the back end is matched with an inlet gradually-decreased type curve vaneless diffuser to improve the performance of the first stage of impeller, and the requirement of the mass-flow compressor is met; and meanwhile, in the second stage, the oblique flow impeller and the oblique flow vaneless diffuser are adopted for improving the off-design performance of the impeller. The two-stage mass-flow oblique flow compressor has the beneficial effects of being large in flow, saving in power dissipation, high in efficiency, simple and compact in structure and the like; the problems that when a multi-stage centrifugal compressor structure is adopted in an existing extra-large and oversized order air separation set, the design difficulty is too large, and the performance is bad are solved, the problems that when a multi-stage axial flow and centrifugal compressor is adopted, the structure is complex, and the reliability is poor are solved, the performance of the second-stage compressor body can be improved, and the two-stage mass-flow oblique flow compressor is particularly suitable for the air separation set with the order ranging from 110000 Nm<3> / h to 150000 Nm<3> / h.
Owner:XI AN JIAOTONG UNIV
Method for generating and simplifying self-similarity traffic of network key node based on opening/closing source model
InactiveCN103259731AEfficient analysisImprove practicalityData switching networksStructure chartStructure of Management Information
A method for generating and simplifying self-similarity traffic of a network key node based on an opening / closing source model comprises the following steps: (1) building a network topology structure chart and confirming the key node, (2) calculating a betweenness of the key node and a change rule of the traffic distribution of the key node along with input parameters, (3) confirming initial parameters of the opening / closing source model of generated data by an edge node, and (4) feeding back and adjusting input parameters, and enabling traffic statistical characteristics of the key node to be the same with a target value. By means of the four steps, the purpose of generating and simplifying the self-similarity traffic of the network key node based on the opening / closing source model is achieved. The method is a simple method used for generating the traffic of key nodes in large-scale network simulations and tests, ensures that under the situation of uniform and simple edge node traffic input, traffic stress which is the same with traffic stress of complex and polybasic edge node traffic input can be obtained, accordingly, provides the traffic stress for effectively analyzing the performance of the key node, and has good practicality and economic value.
Owner:BEIHANG UNIV
Chinese medicine composition for treating sepsis and preparation method thereof
The invention relates to a Chinese medicine composition for treating sepsis and a preparation method thereof. The Chinese medicine composition comprises active ingredients prepared from the following traditional Chinese medicines in parts by weight: 10-20 parts of radix bupleuri, 10-20 parts of radix scutellariae, 10-20 parts of radix salviae miltiorrhizae, 1-5 parts of Chinese rhubarb, 5-10 parts of coptis chinensis, 8-10 parts of radix paeoniae rubra, 5-10 parts of ginseng, 8-10 parts of root of rehmannia, 10-20 parts of honeysuckle, 5-10 parts of fruit of trifoliate orange and 5-10 parts of liquorice. According to the Chinese medicine composition disclosed by the invention, fungi, toxicity and inflammation are treated simultaneously by utilizing synergistic effect of various ingredients, various ways and various target points of the traditional Chinese medicines; in addition, the Chinese medicine composition has unique and exact effects of controlling sepsis in early stage and turning and cutting off the disease development, and has excellent remote effects.
Owner:无锡曙辉药业有限公司
PET copolymer containing non-planar ring and preparation method
The invention provides a PET copolymer containing a non-planar ring and a preparation method. According to the PET copolymer, a third-party monomer is introduced into a PET chain, a cis-form CBDO monomer is adopted, and cis-form CBDO of non-planar ring is added in the direct esterification reaction of PET, so that the performance of the PET polymer can be obviously improved, and particularly the glass transition temperature and the mechanical property are improved; a research result shows that by introducing terephthalic acid CBDO ester into a PET polymer chain, the tenacity of PET can be improved through spatial conformation conversion of the non-planar ring, the glass transition temperature of PET is increased by virtue of the rigidity of steric hindrance of the non-planar ring, and thecomprehensive properties such as mechanical property are improved.
Owner:JIANGSU GUANGHUI PACKAGE
Electronic device and power management method thereof
ActiveCN107153592AEffectively exert full performanceSolve performance deficienciesHardware monitoringPower measurement by thermal methodsArray data structureEngineering
The invention relates to a power management method of an electronic device. The power management method comprises the steps that temperature is sensed; normal-temperature parameter sets and high-temperature parameter sets are obtained, wherein the operation power of a processor of the electronic device during operation by using the high-temperature parameter sets is higher than that during operation by using the normal-temperature parameter sets; when it is determined that the sensed temperature is not greater than a high-temperature critical value, current parameter sets are replaced by the normal-temperature parameter sets to run the processor; when the sensed temperature is greater than the high-temperature critical value, the current parameter sets are replaced by the high-temperature parameter sets to run the processor. The complete efficiency of the processor can be effectively played, and the problem of poor efficiency of the processor under high temperature can be effectively solved.
Owner:SHENXUN COMP KUNSHAN +1
BMP-2 loaded strontium substituted hydroxyapatite/silk fibroin/heparin composite scaffold and preparation method and application thereof
ActiveCN108744061AImprove adhesionPromote proliferationTissue regenerationProsthesisBiological materialsOsteoblast cell differentiation
The invention discloses a BMP-2 loaded strontium substituted hydroxyapatite / silk fibroin / heparin composite scaffold and a preparation method and an application of the BMP-2 loaded strontium substituted hydroxyapatite / silk fibroin / heparin composite scaffold. The advantage that the silk fibroin and the strontium substituted hydroxyapatite are used in bone repair is taken; the heparin is combined onthe composite scaffold to slowly release a growth factor; the BMP-2 is then adsorbed, the growth factor is slowly released to promote the in vitro proliferation of a marrow stroma mesenchymal cell andinduce the marrow stroma mesenchymal cell to differentiate into a bone precursor cell, meanwhile, the doping of the strontium element effectively improves the bone induction capability, the mesenchymal stem cell in the body is collected to differentiate to a bone cell, and the composite scaffold is expected to be widely applied in the field of biological materials.
Owner:BEOGENE BIOTECH GUANGZHOU +1
Low-energy-consumption urea production technology and system adopting CO2 stripping method
ActiveCN103408467ARelieve pressureReduce the temperatureUrea derivatives preparationProductsDecompositionProcess engineering
The invention discloses a low-energy-consumption urea production technology and system adopting a CO2 stripping method and solves the problems that the energy-saving effect is required to be improved, and the production cost and equipment investment are high in a conventional urea production technology. According to the technology, a medium-pressure decomposition recovery system connected in parallel is arranged additionally, so that the problem that medium- pressure low-pressure steam can not be used fully in a conventional high-pressure decomposition recovery system, which is bad for energy conservation, is solved; the low-energy-consumption urea production system through the CO2 stripping method comprises a high-pressure decomposition recovery system and further comprises the medium-pressure decomposition recovery system connected in parallel with the high-pressure decomposition recovery system; the high-pressure decomposition recovery system comprises a high-pressure CO2 stripping tower, a low-pressure decomposition tower and a flash drum connected with one another in sequence; the medium-pressure decomposition recovery system comprises a CO2 stripping tower; the urea stripping liquid outlet of the CO2 stripping tower is connected with the urea stripping liquid inlet of the low-pressure decomposition tower. The system provided by invention is simple, the low-pressure steam can be used effectively, capacity expansion is achieved, the energy-saving and cost-reducing effect is remarkable, and the equipment investment and operating cost are low.
Owner:WUHUAN ENG
Preparation method of modified naphthalene water reducer
InactiveCN108239248ASolve performance deficienciesSmall loss over timeLiquid productPolyethylene glycol
The invention provides a preparation method of a modified naphthalene water reducer, which comprises the following steps: adding naphthalene and naphthol to a reaction kettle in a ratio of 1:1, heating and adding concentrated sulfuric acid, and then performing sulfonation reaction; cooling the materials and adding polyethylene glycol 600 for further reaction; then adding cold water for hydrolysis,cooling and controlling the temperature between 100-110 DEG C, adding naphthylacetic acid and uniformly mixing, adding formaldehyde for condensation; preserving heat for 2.5h, neutralizing with alkaline, so as to obtain a modified naphthalene water reducer liquid product, and performing spray drying, thus obtaining a powdery product. According to the invention, by adding naphthol and naphthylacetic acid, hydroxyl and carboxyl are introduced to the water reducer; after sulfonation reaction, a monomer which has a polyoxyethylene ether long chain and can participate in condensation reaction canbe produced by further acid catalysis action; a water reducer obtained by copolycondensation has sulfonyl, hydroxyl, carboxyl and polyoxyethylene ether long chain in the molecular chain. Sulfonyl, hydroxyl and carboxyl have a synergistic water reducing effect.
Owner:四川金江建材科技有限公司
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