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32results about How to "Meet the needs of various applications" patented technology
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High-strength and high-Gd-content deformed magnesium alloy and preparing method thereof
The invention provides a high-strength and high-Gd-content deformed magnesium alloy and a preparing method thereof. The magnesium alloy comprises the following elements of Mg, Gd, Zn and one or more kinds of Y, Zr and Mn. The preparing method includes the following steps that a magnesium alloy cast ingot high in Gd content is prepared; after the magnesium alloy cast ingot is subjected to two steps of T4 solution treatment, quenching is conducted at the temperature ranging from 80 DEG C to 100 DEG C, and a T4-state magnesium alloy cast ingot is obtained; the T4-state magnesium alloy cast ingot is subjected to different-temperature extrusion forming and is then quenched at the temperature ranging from 15 DEG C to 30 DEG C, and a bar or plate is obtained; and the bar or plate is subjected to cold rolling and cold drawing deformation at the room temperature, then artificial aging is conducted, and a T10-state deformed magnesium alloy, namely the high-strength and high-Gd-content deformed magnesium alloy is obtained. According to the high-strength and high-Gd-content deformed magnesium alloy and the preparing method thereof, the preparing technology is simple, the performance is stable, the success rate is high, the production efficiency is high, and the high-strength and high-Gd-content deformed magnesium alloy and the preparing method thereof are easily applied to industrial production.
Owner:SHANGHAI JIAO TONG UNIV
Encoding method and decoding method for high sharpness video super strong compression
InactiveCN1784008AMeet the needs of various applicationsWide adaptabilityDigital video signal modificationPattern recognitionDecoding methods
This invention discloses a high resolution video ultra strong compression coding / decoding method. Said method includes decomposition of input video and extracting character by small wave change, ordering, quantizing, compressing quantized result in frame and transmitting, separating object from image, predicting next frame, comparing predicted result with input video of next frame, removing same object to obtain residual signal to obtain higher compression ratio, said residual signal used as input video for next circulation. Said invention has higher compression ratio and safety.
Owner:BEIJING K CITY HIGH DEFINITION ELECTRONICS TECH
Device for producing nanofiber nonwoven fabric through multi-needle roller type high-voltage electrostatic spinning
InactiveCN103774251AHigh felting qualityImprove uniformityFilament/thread formingNon-woven fabricsNanofiberEngineering
The invention relates to a device for producing a nanofiber nonwoven fabric through multi-needle roller type high-voltage electrostatic spinning. The device comprises a positive high-voltage power supply, a multi-needle roller spinning system, a transmission device, a postprocessor and a winding device, wherein the multi-needle roller spinning system comprises an electric spinning solution storage tank and a multi-needle roller with metal needles implanted on the surface; the multi-needle roller is fixedly connected to the upper part of the electric spinning solution storage tank and partially immersed in a solution; one end of a spinning bucket is connected with the transmission device to achieve rotation of a spinning rod; the other end of the spinning bucket is connected with the high-voltage power supply; the metal needles on the spinning bucket are dipped in the spinning solution on the lower side and then rotate to the upper side to form threadlike jet stream; the winding device is above the jet stream and is grounded, and spun silk is collected under the action of mechanical control. Due to the multi-needle roller spinning system, the nanofiber yield can be increased, the felt forming quality can be improved, the industrial production cost can be reduced, and single polymer can be produced or a multi-layer composite spinning fiber material of different polymers can be produced in one time.
Owner:MEIKEMAI NANOTECH SUZHOU
Large vacuum annealing furnace
ActiveCN101956047AHigh precision vacuum and temperature controlGood furnace temperature uniformityFurnace typesEngineeringMultiple layer
The invention discloses a large vacuum annealing furnace which is composed of a furnace body, a heating device, a feeding system, a vacuum system, a cooling system and an electric control system, wherein the heating device is arranged in a furnace pipe; the feeding mechanism comprises a feeding trolley, a trailer wagon, a rack and a guide rail along which the rack moves back and forth; the feeding trolley moves back and forth along a steel rail laid in front of a furnace door under the action of a travelling mechanism; the rack travels on the guide rail by a roller row which is composed of a plurality of parallel rollers, and each roller is connected with a roller row frame by a shaft; the vacuum system is used for maintaining the vacuum degree of each annealing stage in the furnace body; the cooling system at least comprises a cooling water system for cooling each group of heaters; the heating device is composed of a plurality of heaters which are mutually and movably connected, and the heaters are installed in the furnace pipe in order; multiple layers of heat shields are arranged between each group of heaters and the inner wall of the furnace pipe; and the a guide rail along which a feeding rack moves back and forth is provided with a group of dismountable sectioned racks which are movably connected.
Owner:GRIMAT ENG INST CO LTD
Silicon-containing heat-resistant rare earth magnesium alloy and preparation method thereof
The invention discloses a silicon-containing heat-resistant rare earth magnesium alloy and a preparation method thereof, wherein the alloy comprises the following components by weight percentage: 5-10% of Gd, 2-8% of Y, 0.3-2% of Si, 0.35-0.8% of Zr, 1-13% of Gd+Y1, less than 0.02% of impurities and the balance of magnesium. The invention also relates to a preparation method of the silicon-containing heat-resistant rare earth magnesium alloy; and the method comprises the steps of raw material preheating, smelting and subsequent heat treatment, wherein the smelting is carried out under protection of the mixed gases of SF6 and CO2; and the subsequent heat treatment comprises solid-solution treatment and aging treatment on the silicon-containing heat-resistant rare earth magnesium alloy. The preparation method of the silicon-containing heat-resistant rare earth magnesium alloy is simple in process, low in content of rare earth, and capable of guaranteeing excellent plasticity while improving the strength of the alloy; and a high-strength high-tenacity heat-resistant wearable magnesium alloy can be obtained by adjusting the constituents of the alloy and the heat treatment process; besides, the obtained magnesium alloy can be applied to a plurality of fields of automobile, aerospace, war industry and the like, and thereby is capable of meeting the requirements of a plurality of application occasions.
Owner:SHANGHAI JIAO TONG UNIV
Convertible walking mechanism of robot
InactiveCN103010325AMeet the needs of modular designGuaranteed compactnessVehiclesDrive wheelRoad surface
The invention relates to a convertible walking mechanism of a robot, solving defects existing in a single walking mechanism, wherein each transmission chain part is controlled through the adoption of concentric shafts; each transmission interior shaft is directly connected with a track driving wheel in a track type structure and a wheel in a wheel type structure through flat keys; each track covers the track driving wheel and a track guide wheel; the track driving wheel and the track guide wheel covered by each track are fixedly arranged in each track bracket; each transmission exterior shaft is fixedly connected with the track bracket through screws, so that the swing of each track type structure is realized; and a track auxiliary wheel in each track type structure is fixedly arranged on a track auxiliary wheel supporting frame and connected in series with a motor together with two connecting bars through dowels for the formation of a four-bar mechanism group. The convertible walking mechanism of the robot is simple in mechanical structure, high in transmission efficiency and strong in adaptation ability, and can be applicable for various-condition road surfaces; and therefore, the application prospect is wide.
Owner:BEIJING UNIV OF POSTS & TELECOMM
Mg-Li-Al-Zn-Y-based cast magnesium-lithium alloy and heat treatment method thereof
The invention discloses Mg-Li-Al-Zn-Y-based cast magnesium-lithium alloy and a heat treatment method thereof. The magnesium-lithium alloy comprises, by mass, 5-10% of Li, 2-4% of Al, 1-3% of Zn, 1-2%of Y, 0.2-0.8% of Zr, 0-0.05% of Ti, and the balance Mg and unavoidable impurities. By introducing Al and Y to form an Al2Y heat-resistant strengthening phase, the strength and thermal stability of the magnesium-lithium alloy can be significantly improved; meanwhile, by adding Zn, solid solution strengthening can be promoted; by adding trace Zr and Ti, the effect of refining grains can be achieved. The invention also relates to the heat treatment method of the magnesium-lithium alloy. The method comprises the steps of two-stage solid solution treatment and aging treatment, wherein solid solution treatment is performed at 280-420 DEG C for 2-8 hours, then solid solution treatment is performed at 200-270 DEG C for 0-16 hours, and water cooling is performed; finally, aging is performed at 50-150 DEG C for 0-40 hours, and air cooling is performed. The magnesium-lithium alloy is simple in process and can be applied to the fields of aviation, aerospace, military industry, electronics and thelike.
Owner:SHANGHAI JIAO TONG UNIV +1
Container energy storage control system
InactiveCN105262157ALarge storage capacityImprove conversion efficiencyBatteries circuit arrangementsAc network load balancingNetwork communicationEnergy conversion efficiency
The invention provides a container energy storage control system. The container energy storage control system comprises a container, an energy storage battery group arranged at the internal part of the container, a BMS battery management system, a micro-control unit, and an energy storage bidirectional conversion unit, the BMS battery management system is connected with the energy storage battery group, the BMS battery management system is connected with an EMS management unit, the energy storage battery group is connected with the energy storage bidirectional conversion unit, the EMS management unit and the energy storage bidirectional conversion unit are connected with the micro-control unit via a bus, and the bus is provided with a network communication interface. According to the container energy storage control system, lithium ferrous phosphate batteries are employed, the battery storage capacity is high, and the battery energy conversion efficiency reaches 96%; the dynamic balanced battery management technology is employed, battery maintenance can be rapidly and automatically accomplished, and various application occasion requirements are met; and an omnibearing and multi-layered battery protection strategy and fault isolation measures are provided so that the safety application operation of the energy storage system can be more convenient.
Owner:JIANGSU FGY ENERGY STORAGE RES INST
Antibacterial microemulsion gel and preparation method thereof
PendingCN112336685AImprove wettabilityImprove stabilityAntibacterial agentsOrganic active ingredientsAntibacterial activityBiomedicine
The invention relates to antibacterial microemulsion gel and a preparation method thereof. The preparation method of the microemulsion gel takes a Pickering emulsion as a template, and comprises the following steps of (1) preparing a continuous phase which is composed of distilled water, gelatin nanoparticles, aminoglycoside antibiotics and oxidized polysaccharide; and (2) adding a dispersion phase containing antibacterial essential oil into the continuous phase, performing emulsifying to obtain the Pickering emulsion, and performing reaction crosslinking for a certain time to obtain the antibacterial microemulsion gel. The constructed microemulsion gel is intelligent microemulsion gel administrated as required, the release of the antibiotics and antibacterial essential oil can be regulated and controlled according to in-vitro environmental conditions, the antibacterial activity is high, and the microemulsion gel can be applied to the biomedical fields of drug controlled release systems, medical dressings and the like.
Owner:SOUTHWEST JIAOTONG UNIV
Encoding method and decoding method for high sharpness video super strong compression
InactiveCN1784008BIncrease flexibilityImprove interactivityTelevision systemsDigital video signal modificationPattern recognitionDecoding methods
Owner:BEIJING K CITY HIGH DEFINITION ELECTRONICS TECH
Fluid distribution valve and fluid treatment device
PendingCN109764155ASimple structureReduce manufacturing difficultyIon-exchange process apparatusMultiple way valvesRotary valveEngineering
The invention discloses a fluid distribution valve. The fluid distribution valve comprises a valve assembly and a transmission device. The fluid distribution valve is characterized in that the valve assembly comprises a fixed valve disc, a rotary valve element and a fixed sleeve, N pairs of fluid channels penetrating through a valve disc body are uniformly distributed on the fixed valve disc, eachpair of fluid channels comprises one feeding fluid channel and one discharging fluid channel, the rotary valve element is arranged at the upper part, the lower part or the side part of the fixed valve disc and arranged in the fixed sleeve, is in sealing connection with the fixed sleeve and can rotate around the central axis, and the transmission device is connected with the rotary valve element and drives the rotary valve element to rotate. The invention further provides a fluid treatment device adopting the fluid distribution valve. According to the fluid distribution valve and the fluid treatment device adopting the fluid distribution valve, the complex "whirligig structure" is avoided, meanwhile, the equipment structure is simplified, the manufacturing difficulty and the equipment costof equipment are greatly reduced, moreover, the whole equipment can stand and lie down, and then the requirements of various application occasions can be met.
Owner:XIAMEN FILTER & MEMBRANE TECH
A kind of high-strength cast magnesium alloy containing Zn and heavy rare earth gd and preparation method thereof
ActiveCN105483485BIncrease the number ofImprove mechanical propertiesWeighing by removing componentWeather/light/corrosion resistanceRare earthRoom temperature
The invention discloses a high-strength cast magnesium alloy containing Zn and heavy rare-earth Gd and a preparation method of the high-strength cast magnesium alloy. The high-strength cast magnesium alloy comprises the following components in percent by weight: 10-18 percent of Gd, 0.5-2 percent of Zn, 0.3-0.7 percent of Zr, less than 0.02 percent of inevitable impurities, and the balance of Mg. The preparation method comprises the following steps: weighing the raw materials, smelting the raw materials, casting the smelted material, and conducting the post heat treatment on the cast material. The smelting is conducted under the protection of a solvent or an SF6 and CO2 mixed gas. The post heat treatment comprises two-step solid-solution treatment and one-step aging treatment of the high-strength cast magnesium alloy. The high-strength cast magnesium alloy is simple in process, high in production efficiency, and easily applied to industrial production. The high-strength cast magnesium alloy prepared according to the preparation method can be up to 400-430 MPa in tensile strength at room temperature, and 290-330 MPa in yield strength, is superior to other commercial magnesium alloys in the current market, can be applied in multiple fields such as automobile manufacturing and aerospaces, and meets the requirements of various application occasions.
Owner:SHANGHAI JIAO TONG UNIV
Implementation method of solid state disk based on cascade architecture
InactiveCN110764689AReduce complexityUnlimited expansion of storage capacityInput/output to record carriersSolid-stateEngineering
The invention discloses an implementation method of a solid state disk based on cascade architecture. The implementation method comprises the following steps that: S1: an SSD (Solid State Disk) controller is connected with a plurality of cascade storage mechanisms in parallel, and each cascade storage mechanism adopts a plurality of storage devices to form a multi-level architecture in a bus cascade mode through self interfaces of the storage devices; S2, when the SSD controller sends a storage task to the cascade storage mechanism, each storage device monitors a bus signal and judges whetherthe storage task is a storage task of the storage device or a cascade link node of the storage device or not; and S3, when any storage device sends data to the SSD controller or a subordinate node ofthe SSD controller, the storage device actively sends an instruction to preempt the bus control right, and chip selection is realized through the instruction. By adopting the technical scheme of the invention, a plurality of storage devices are cascaded step by step through the standard interface, so that the storage capacity can be infinitely expanded theoretically to meet the requirements of various applications; and meanwhile, the implementation complexity of the solid state disk is further reduced by adopting standard interface cascading.
Owner:虞加考
Hierarchical processing method for spatio-temporal trajectory data
ActiveCN106643734BAdd expressionsImprove efficiencyNavigational calculation instrumentsFeature vectorCompression method
The invention relates to a grading processing method for space-time track data. The grading processing method comprises the following steps of obtaining increment track data, wherein the track is a path formed by a mobile object in space; using an online compression method to compress the increment track data in real time; obtaining offline track data within a period of time; using an offline compression method to compress the offline track data; extracting feature vectors from the offline track data.
Owner:济钢防务技术有限公司
Signal source generation system and control method thereof
PendingCN106154870ARich inputHighly integratedProgramme control in sequence/logic controllersComputer hardwareRemote control
The invention discloses a signal source generation system and a control method thereof. The signal source generation system comprises a remote control device and a master control device; the master control device comprises a first control module, a first power supply module, a first infrared module and an audio and video module; the audio and video module is composed of a digital audio module, an AV module, an aberration module, an S terminal module and a second HDMI module; the remote control device is composed of a second control module, a second power supply module, a button module and a second infrared module; and the second power supply module supplies power to the second control module, the second control module processes button data of the button module, and the button data is sent via the second infrared module. The signal source generation system and the control method thereof have the advantages that abundant input or output signals are provided, the integrated degree is high, requirements of different application occasions can be met, each path of signals can be controlled via software, and use is flexible.
Owner:EVOC SMART IOT TECH CO LTD
Text semantic processing method and system using image processing technology and semantic vector space
InactiveCN104035992BGuaranteed lightweightMeet the needs of various applicationsSemantic analysisSpecial data processing applicationsSemantic vectorImaging processing
The invention belongs to the technical field of text semantic information processing, and in particular relates to a method and a system for processing text semantics by utilizing an image processing technology and semantic vector space. The system comprises a text input and preprocessing module, a semantic vector construction module, a semantic information processing module and a semantic processing result display module, wherein the semantic information processing module is specifically used for semantic turning sentence extraction, semantic noise sentence detection, semantic range tracking and semantic scene segmentation. According to the method and the system, a text unit is mapped to a pixel in an image, and a semantic vector which describes the text unit is taken as pixel grayscale of the image, so that various technologies and methods in an image processing field can be introduced to process a text flexibly and intuitively without the influence of the diversification of word forms; meanwhile, the semantic vector is constructed by instructing a Word2Vec method, so that the lightweight of algorithms is ensured to meet the requirements on real-time application.
Owner:SHANGHAI JILIAN NETWORK TECH CO LTD
Big data storage implementation method
InactiveCN110764687AReduce complexityUnlimited expansion of storage capacityInput/output to record carriersComputer hardwareData store
The invention discloses a big data storage implementation method. The big data storage implementation method comprises the following steps: S1, adopting a plurality of storage devices to form a large-scale storage mechanism of a multi-level architecture through bus cascading in sequence; S2, during data storage, adopting each storage device to monitor the bus and acquire a storage task matching the storage device; and S3, forwarding the obtained storage task to other storage devices cascaded with the storage task through a bus. By adopting the technical scheme of the invention, the cascade control algorithm is built in the storage device, so that cascade can be realized through a standard interface, and the storage capacity can be infinitely expanded theoretically to meet the requirementsof various applications; and meanwhile, standard interface cascading is adopted, so that the complexity of circuit implementation is further reduced.
Owner:虞加考
Deformed magnesium alloy with high strength and high gd content and preparation method thereof
ActiveCN106148792BIncrease the number ofImprove mechanical propertiesSolution treatmentRoom temperature
Owner:SHANGHAI JIAOTONG UNIV
Intelligent rehabilitation bracelet based on attitude sensor and gesture control system
InactiveCN113017611ABroaden applicationIncrease diversityEvaluation of blood vesselsSensorsWireless controlOriginal data
The invention discloses an intelligent rehabilitation bracelet based on an attitude sensor and a gesture control system. The intelligent rehabilitation bracelet is composed of a processor module, a wireless communication module, a power module, a health monitoring module and an attitude detection module, wherein all the modules are integrated on a PCB, and sensor original data at the wrist is obtained in real time; and the data is transmitted to the processor module through a near field communication protocol. According to the invention, the attitude sensor and the attitude calculation algorithm are applied to the field of smart bracelets, the application range of the smart bracelet is expanded, and the gesture control system based on the smart bracelet improves the diversity and adaptability of rehabilitation equipment control. A user is allowed to wirelessly control rehabilitation equipment through various gestures, a rehabilitation object can perform rehabilitation training and life to a certain extent, diversified control modes can meet the requirements of various application occasions, great convenience is brought to the rehabilitation object, and the system has good application prospects in the fields of medical treatment, rehabilitation, disabled helping and the like.
Owner:SOUTH CHINA UNIV OF TECH
A large vacuum annealing furnace
ActiveCN101956047BMeet the demanding requirements of annealingIncrease vacuumFurnace typesEngineeringElectric control
The invention discloses a large vacuum annealing furnace which is composed of a furnace body, a heating device, a feeding system, a vacuum system, a cooling system and an electric control system, wherein the heating device is arranged in a furnace pipe; the feeding mechanism comprises a feeding trolley, a trailer wagon, a rack and a guide rail along which the rack moves back and forth; the feeding trolley moves back and forth along a steel rail laid in front of a furnace door under the action of a travelling mechanism; the rack travels on the guide rail by a roller row which is composed of a plurality of parallel rollers, and each roller is connected with a roller row frame by a shaft; the vacuum system is used for maintaining the vacuum degree of each annealing stage in the furnace body; the cooling system at least comprises a cooling water system for cooling each group of heaters; the heating device is composed of a plurality of heaters which are mutually and movably connected, and the heaters are installed in the furnace pipe in order; multiple layers of heat shields are arranged between each group of heaters and the inner wall of the furnace pipe; and the a guide rail along which a feeding rack moves back and forth is provided with a group of dismountable sectioned racks which are movably connected.
Owner:GRIMAT ENG INST CO LTD
Manufacturing process of clay ornaments
The invention relates to a manufacturing process of clay ornaments, clay with plasticity index of 5-9 is taken as raw material, and the following steps are adopted: the first step: pretreatment and drying; the second step: crushing or tabletting and aging; the third step: mould pressing; and the fourth step: air-drying and post-treatment. The clay with the better plasticity index is utilized, or thermal refining is performed on the ordinary clay so as to enable the clay to achieve the better plasticity range, and the clay ornaments with low cost, attractive appearance and no cracks can be simply and quickly manufactured through the processes of drying, crushing, aging and mould pressing; and various waterproof and weathering-proof fine ornaments with high degree of imitation of antique imitation, copper imitation and the like can be manufactured by coating waterproof coatings on the surfaces and coloring with paints.
Owner:刘云峰
A kind of mg-li-al-zn-y cast magnesium-lithium alloy and heat treatment method thereof
ActiveCN108456813BHigh strengthImprove thermal stabilitySolution treatmentSolid solution strengthening
The invention discloses Mg-Li-Al-Zn-Y-based cast magnesium-lithium alloy and a heat treatment method thereof. The magnesium-lithium alloy comprises, by mass, 5-10% of Li, 2-4% of Al, 1-3% of Zn, 1-2%of Y, 0.2-0.8% of Zr, 0-0.05% of Ti, and the balance Mg and unavoidable impurities. By introducing Al and Y to form an Al2Y heat-resistant strengthening phase, the strength and thermal stability of the magnesium-lithium alloy can be significantly improved; meanwhile, by adding Zn, solid solution strengthening can be promoted; by adding trace Zr and Ti, the effect of refining grains can be achieved. The invention also relates to the heat treatment method of the magnesium-lithium alloy. The method comprises the steps of two-stage solid solution treatment and aging treatment, wherein solid solution treatment is performed at 280-420 DEG C for 2-8 hours, then solid solution treatment is performed at 200-270 DEG C for 0-16 hours, and water cooling is performed; finally, aging is performed at 50-150 DEG C for 0-40 hours, and air cooling is performed. The magnesium-lithium alloy is simple in process and can be applied to the fields of aviation, aerospace, military industry, electronics and thelike.
Owner:SHANGHAI JIAOTONG UNIV +1
A dob lighting module
InactiveCN106015971BImprove lighting effectsTo achieve color processingElectrical apparatusElectric circuit arrangementsOptoelectronicsPhysics
Owner:CHINA COTRUN TECH
Heat treatment method of mg-gd-y-zr series magnesium alloy and its large complex casting
The invention discloses an Mg-Gd-Y-Zr magnesium alloy and a heat treatment method of a large-scale complex casting prepared from the Mg-Gd-Y-Zr magnesium alloy. The Mg-Gd-Y-Zr magnesium alloy comprises, by weight, 8.5-10% of Gd, 2.5-3.5% of Y, 0.4-0.6% of Zr, less than or equal to 0.15% of impurities and the balance Mg. The heat treatment method of the large-scale complex casting prepared from the Mg-Gd-Y-Zr magnesium alloy comprises the following steps of 1, carrying out solid solution of the Mg-Gd-Y-Zr magnesium alloy casting, carrying out heat preservation, and carrying out air cooling to a room temperature, and 2, carrying out aging treatment, carrying out heat preservation, and carrying out air cooling to the room temperature. The heat treatment method solves the problem that a rapid cooling process causes uneven shrinkage of all parts so that deformation and cracking phenomenon is produced and a yield is improved by 50%. The heat treatment method has the simple processes, saves water resource, is suitable for large-scale production, can be used in fields of automobiles, aviation and spaceflight, and war industry, and can satisfy requirements of a plurality of application occasions.
Owner:SHANGHAI JIAO TONG UNIV
A 3D porous scaffold prepared using pickering high internal phase emulsion as a template
ActiveCN105968402BImprove wettabilityImprove hydrophilicityCell culture supports/coating3D cultureFunctional monomerOrganic solvent
The invention relates to a 3D porous scaffold material prepared by taking a Pickering high internal phase emulsion as a template and a preparation method of the material. According to the 3D porous scaffold material and the preparation method of the material, gelatin nanoparticles serve as an emulsion stabilizer, water serves as a continuous phase, an organic solvent serves as a dispersion phase, polymerizable functional monomers, an initiator and a crosslinking agent are dissolved in the continuous phase, the oil-in-water type (O / W) Pickering high internal phase emulsion is formed through homogenizing emulsification, and the 3D porous scaffold material is prepared through a polymerization reaction. The prepared 3D porous scaffold material not only has high porosity and a rich multi-layer pore canal structure, but also has a good mechanical property and biocompatibility and can serve as a cell culture scaffold to be widely used in the field of biomedical materials.
Owner:CHENGDU UNIV
Preparation method of a natural polymer-based 3D porous composite scaffold with controllable pore size
ActiveCN108201636BImprove hydrophobicityImprove the rigidity of the structurePharmaceutical delivery mechanismProsthesisOrganosolvSolvent
The invention provides a method for preparing a natural polymer-based 3D porous composite scaffold with a controlled pore size. The method includes first preparing aminated gelatin, preparing aminatedgelatin nanoparticles by combination with a twice desolvation method, using the particles as a stabilizer for Pickering high internal phase emulsion, dissolving the aminated gelatin and dialdehyde starch into deionized water to form a continuous phase of an emulsion, taking an organic solvent as a dispersed phase, performing homogeneous emulsification treatment to form an oil-in-water Pickering high internal phase emulsion, and then through the intermolecular covalent crosslinking reaction; fixing the continuous phase of the emulsion, and finally removing the dispersed phase through solvent evaporation to obtain the 3D porous composite scaffold with the controlled pore size. According to the method, a Pickering emulsion template method is adopted, the aminated gelatin nanoparticles are taken as the stabilizer, a natural polymer is taken as a base material, and the problems that at present, the porous scaffold is uncontrollable, the material is difficult to degrade, and a degradation product poisons tissue cells are solved. The porous scaffold prepared by the method has good application prospects in the field of tissue engineering.
Owner:SICHUAN UNIV
Silicon-containing heat-resistant rare earth magnesium alloy and preparation method thereof
The invention discloses a silicon-containing heat-resistant rare earth magnesium alloy and a preparation method thereof, wherein the alloy comprises the following components by weight percentage: 5-10% of Gd, 2-8% of Y, 0.3-2% of Si, 0.35-0.8% of Zr, 1-13% of Gd+Y1, less than 0.02% of impurities and the balance of magnesium. The invention also relates to a preparation method of the silicon-containing heat-resistant rare earth magnesium alloy; and the method comprises the steps of raw material preheating, smelting and subsequent heat treatment, wherein the smelting is carried out under protection of the mixed gases of SF6 and CO2; and the subsequent heat treatment comprises solid-solution treatment and aging treatment on the silicon-containing heat-resistant rare earth magnesium alloy. The preparation method of the silicon-containing heat-resistant rare earth magnesium alloy is simple in process, low in content of rare earth, and capable of guaranteeing excellent plasticity while improving the strength of the alloy; and a high-strength high-tenacity heat-resistant wearable magnesium alloy can be obtained by adjusting the constituents of the alloy and the heat treatment process; besides, the obtained magnesium alloy can be applied to a plurality of fields of automobile, aerospace, war industry and the like, and thereby is capable of meeting the requirements of a plurality of application occasions.
Owner:SHANGHAI JIAO TONG UNIV
Electric control system of prefabricated cabin type intelligent high-power variable-frequency drilling machine
PendingCN113708705AReduce consumptionReduce labor intensityBus-bar/wiring layoutsAC motor controlFrequency changerLow voltage
The invention discloses an electric control system of a prefabricated cabin type intelligent high-power variable-frequency drilling machine. The system comprises a frequency converter cabinet and a PLC control cabinet. The frequency converter cabinet is used for installing frequency converter units, and one or more frequency converter units can be selected to be installed in the cabinet according to the number and capacity of controlled motors. In the PLC control cabinet, a programmable controller, a touch screen, an integrated industrial personal computer, a frequency converter control unit, an intelligent remote control terminal, an isolation transformer, a sensor and a relay are mainly installed. According to the electric control system of the high-power variable-frequency energy-saving drilling machine, the intelligent substation technology, the modular prefabricated cabin technology and the variable-frequency speed regulation energy-saving technology are organically combined, and high-low voltage power distribution equipment, a dry-type power transformer, a motor intelligent control system and a static var generator are integrated in one prefabricated cabin, so that variable-frequency speed regulation of a high-power motor can be realized, personal safety is guaranteed, energy consumption is reduced, and labor intensity of workers is reduced.
Owner:乐山一拉得电网自动化有限公司
Double-frequency dipole antenna
InactiveCN105990672AWide rangeLow costRadiating elements structural formsAntenna earthingsPhysicsDipole antenna
The invention discloses a dual-frequency dipole antenna, which includes a substrate, a grounding area, a radiation body, a grounding point and a feeding point. The ground area can be disposed on the substrate. The radiating body can be adjacent to the grounding area, can be arranged on the substrate, and can include a first radiating body and a second radiating body, the first radiating body can be connected to the second radiating body, and the first radiating body and the second radiating body can There may be a groove between the bodies, and the size of the radiation body may be asymmetric to the size of the grounding area. The grounding point can be arranged on the substrate and can be connected to the grounding area. The feed-in point can be arranged on the substrate and can be connected to the radiation body, and the ground point and the feed-in point can be arranged adjacent to each other.
Owner:ARCADYAN
Preparation method of waterborne epoxy resin dispersion
ActiveCN113307984AMilky and delicate appearanceMeet environmental protection requirementsEpoxy resin coatingsEpoxyPolymer science
The invention belongs to the technical field of chemical coatings, and discloses a preparation method of a waterborne epoxy resin dispersion. Hydrophilic groups are introduced into solid epoxy resin molecules to form a block molecular structure with the solid epoxy resin, then ring-opening and ring-closing reactions are carried out through epoxy chloropropane, and finally the obtained modified epoxy resin keeps the structural characteristics and reaction activity of the solid epoxy resin. And finally, extending of groups with reaction activity and hydrophilicity to a water phase in a manner of slowly dropwise adding water and dispersing at a high speed, and extending of the solid epoxy resin in the block and the unmodified solid epoxy resin to an oil phase are carried out, so that the stable water borne epoxy resin dispersion is obtained. The waterborne epoxy resin dispersion prepared by the method does not contain volatile organic solvents, and is high in solid content, low in viscosity, good in storage and dilution stability and convenient to transport and use. The waterborne epoxy coating prepared from the epoxy resin has good adhesive force, good salt fog resistance and excellent chemical resistance.
Owner:广西桂林荣鑫新材料科技有限公司
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