Product
Patsnap Eureka
For R&D, Patsnap Eureka makes reading and utilizing patents & technical documents easy.
Patsnap Eureka AIR
Designed for self-driven R&D workflows. Generate viable solutions, solve complex R&D challenges, empower your innovation with AI.
Patsnap Eureka Materials
Designed for material experts only. Revolutionize your material R&D, from search, analyze, to developing new materials.
Feature
TechResearch
Generate reliable direction feasibility study reports for your R&D in just a few steps.
TechSeek
Discover and master advanced knowledge NOW. Basics, ideas, possibilities, all at once.
TechMind
As an expert in R&D Theories, TechMind can generates customized viable solutions instantly.
TechRisk
Analyze your overall solution with one click, know your potential R&D risks in advance.
TechMonitor
Get weekly tech updates, stay abreast of the latest tech innovations and key insights.
Patents
Literature
Hiro is an intelligent assistant for R&D personnel, combined with Patent DNA, to facilitate innovative research.
60results about How to "Broaden research ideas" patented technology
Efficacy Topic
Property
Owner
Technical Advancement
Application Domain
Technology Topic
Technology Field Word
Patent Country/Region
Patent Type
Patent Status
Application Year
Inventor
Synthesis method of polycarboxylic acid high-performance water reducing agent of star-like structure
ActiveCN102911322AExtended Dionon Design-Structure-PropertyExpanding the theoretical connotation of the design-structure-performance of moleculesSynthesis methodsPolyethylene glycol
The invention discloses a synthesis method of a polycarboxylic acid high-performance water reducing agent of a star-like structure, belonging to the field of a water reducing agent. According to the synthesis method, polybasic alcohol, (methyl) acrylic acid, a polyethylene glycol compound and the like are used as esterification raw materials, and the polycarboxylic acid high-performance water reducing agent of the star-like structure is prepared through a sequential esterification and polymerization method, i.e., the (methyl) acrylic acid and the polybasic alcohol are used as reactants, a star-like polymerizable active end is prepared through esterification reaction under the action of a catalyst, and then the polycarboxylic acid high-performance water reducing agent is prepared from the star-like polymerizable active end and esterification macromolecule, a molecular weight regulator and an unsaturated carboxylic acid monomer under the action of an initiator through free radical polymerization reaction. The synthesis method has the advantages of simplicity, easiness in control, high polymerization degree, low cost, no pollution, capability of realizing the polycarboxylic acid high-performance water reducing agent of the star-like structure connected with a plurality of polycarboxylic acid molecules, and more superior cement paste fluidity and holding capacity, good cement adaptability and concrete application performance compared with the conventional linear and comb-shaped polycarboxylic acid water reducing agent in the case of normal and low added amount.
Owner:GUIZHOU DR SHI TECH
Double-assistance circular spherical steering system and control method thereof
ActiveCN106741127AGood control effectSimple structureMechanical steering gearsElectric energy managementSteering wheelEngineering
The invention discloses a double-assistance circular spherical steering system and a control method thereof. The system comprises a steering wheel, a steering tubular column, a torque sensor, a segment gear, a bidirectional gear and worm reducing mechanism, a steering rocker arm, a steering transverse pull rod, wheels, a vehicle speed sensor, a yaw velocity sensor, an electronic control unit and a left-right assistance motor. In a running process, the electronic control unit acquires signals of the torque sensor, the yaw velocity and the vehicle speed, difference between the perfect yaw velocity and the actual yaw velocity is calculated, the compensation torque of the double-assistance motor is recalculated by a designed adaptive fault-tolerant controller, and a ECU transmits pulse to control running of the adaptive fault-tolerant controller to finish control on stability of an automobile under the normal condition and under the condition that an actuator fails partially. Adaptive fault-tolerant control on the double-assistance circular spherical steering system can be realized, and reliability of the steering system and stability and safety of the automobile during running are improved.
Owner:NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
An image abstract generation method based on object detection
PendingCN109543699ABroaden research ideasReduce wasteCharacter and pattern recognitionNeural architecturesFeature extractionImage description
The invention discloses an image abstract generation method based on object detection, which comprises the following steps: feature extraction of image local area, attention mechanism system and imagedescription generation. The feature extraction of image local area is connected with the attention mechanism system, and the attention mechanism system is connected with the image description generation. The image local region feature extraction adopts Faster RCNN detection method to extract image region feature, and Faster RCNN consists of three parts: original image feature extraction, RPN network and ROI pooling. The present invention applies the object detection algorithm to the image summary task, and uses the local area image feature to represent the whole image, which greatly reduces the calculation amount and the waste of resources without losing the image information. The invention expands the research thought of the image summary task, and has certain reference value for the research of the image summary task.
Owner:NORTH CHINA UNIVERSITY OF TECHNOLOGY
Synthesis method of polycarboxylic acid high-performance water reducing agent of star-like structure
ActiveCN102911322BExtended Dionon Design-Structure-PropertyExpanding the theoretical connotation of the design-structure-performance of moleculesSynthesis methodsPolyethylene glycol
The invention discloses a synthesis method of a polycarboxylic acid high-performance water reducing agent of a star-like structure, belonging to the field of a water reducing agent. According to the synthesis method, polybasic alcohol, (methyl) acrylic acid, a polyethylene glycol compound and the like are used as esterification raw materials, and the polycarboxylic acid high-performance water reducing agent of the star-like structure is prepared through a sequential esterification and polymerization method, i.e., the (methyl) acrylic acid and the polybasic alcohol are used as reactants, a star-like polymerizable active end is prepared through esterification reaction under the action of a catalyst, and then the polycarboxylic acid high-performance water reducing agent is prepared from the star-like polymerizable active end and esterification macromolecule, a molecular weight regulator and an unsaturated carboxylic acid monomer under the action of an initiator through free radical polymerization reaction. The synthesis method has the advantages of simplicity, easiness in control, high polymerization degree, low cost, no pollution, capability of realizing the polycarboxylic acid high-performance water reducing agent of the star-like structure connected with a plurality of polycarboxylic acid molecules, and more superior cement paste fluidity and holding capacity, good cement adaptability and concrete application performance compared with the conventional linear and comb-shaped polycarboxylic acid water reducing agent in the case of normal and low added amount.
Owner:GUIZHOU DR SHI TECH
Community-based authors and their academic paper recommendation system and recommendation method
ActiveCN103559262BSmall amount of calculationMeet individual needsWeb data indexingSpecial data processing applicationsPersonalizationCommunity based
The invention relates to a community-based author and academic paper recommending system and a recommending method. A double-layer quotation network consisting of an author layer and an academic paper layer is formed by utilizing a quotation relation between an author and the academic paper and the community information, then a user interesting model is established according to a historic behavior record of the user and the academic paper set read by the user, finally the user demand is analyzed according to the obtained double-layer quotation network and the user interesting model, and the author and academic paper thereof can be recommended to the user. The system is provided with an academic paper capturing module, an academic paper preprocessing module, a double-layer quotation network establishing module, a user interesting model establishing module and an individualized academic paper recommending module as well as a database. By adopting the recommending system and recommending method, not only can the correlation of the study content among users be used for establishing an author community through a subjective model, but also multiple attribute values of the to-be-recommended author and academic paper inside the community can be calculated, and the weakness that the calculation of the existing recommending algorithm is large can be improved; and meanwhile, multiple attribute values of the author and academic paper can be simultaneously calculated, so that the recommend result is more diversified, and the user requirement can be better met.
Owner:BEIJING UNIV OF POSTS & TELECOMM
Preparation method for cationic side chain esterified-grafted highly-mud-resistant cement dispersing agent
ActiveCN106117564AExpanding the theoretical connotation of the design-structure-performance of moleculesBroaden research ideasPolymer sciencePolyethylene glycol
The invention discloses a preparation method for a cationic side chain esterified-grafted highly-mud-resistant cement dispersing agent, and belongs to the field of dispersing agents. The preparation method comprises the following steps: performing free radical polymerization on an unsaturated carboxylic acid monomer serving as a reactant to obtain a polycarboxylic acid main chain under the action of an initiator and a chain transfer agent, performing free radical polymerization on an unsaturated cationic quaternary ammonium salt monomer serving as a reactant to obtain a hydroxyl-terminated cationic side chain under an oxidization-reduction initiation system formed by high-valence ceric salt and alcohol, and performing esterification-grafting reaction on the polycarboxylic acid main chain, the hydroxyl-terminated cationic side chain and a polyethylene glycol compound in the presence of a catalyst. According to the preparation method, a process is simple and easy to control, and the preparation method is low in cost, energy-saving, efficient, environment-friendly and free of pollution; a composite side chain structure is modified and synthesized by a molecular structure design, so that side chain steric hindrance effects are successfully achieved, cationic charge arrangement is successfully implemented, water reduction and slump retaining characteristics and clay side effect suppression capabilities higher than those of an ordinary polycarboxylic acid water reducing agent are achieved, and the dispersing agent has broad market prospect and great popularization and application potential.
Owner:BEIJING UNIV OF TECH
Polypropylene/montmorillonite/graphite nanocomposite material and preparation method for same
InactiveCN103360678AEnable mass manufacturingGood mechanical propertiesPigment treatment with non-polymer organic compoundsAntioxidantPolypropylene
The invention belongs to the technical field of high polymer materials, and discloses a polypropylene / montmorillonite / graphite nanocomposite material and a preparation method for the polypropylene / montmorillonite / graphite nanocomposite material. The composite material is prepared from the following constituents in parts by weight: 100 parts of polypropylene, 1-10 parts of organically-modified montmorillonite, 0.1-1 part of maleic anhydride, 0.01-0.1 part of an initiator, 1-12 parts of graphite, 0.01-1 part of an antioxidant and 1-10 parts of a lubricant. The preparation method comprises the following steps of: mixing 5-40 parts of polypropylene in the 100 parts of polypropylene with the 1-10 parts of organically-modified montmorillonite, the 0.1-1 part of maleic anhydride and the 0.01-0.1 part of the initiator for 5-20 minutes, extruding at 190-220 DEG C by a double-screw extruder to granulate, so as to obtain maleic anhydride-grafted polypropylene master batches containing organic montmorillonite; and then mixing the remainder polypropylene in the 100 parts of polypropylene with the 1-10 parts of the lubricant, 0.01-1 parts of the antioxidant, the master batches obtained in the step aforementioned, and 1-12 parts of graphite for 5-20 minutes, extruding at 200-230 DEG C by a double-screw extruder to granulate, so as to prepare the composite material. The composite material is good in mechanical property, conductive property and flame-retardant property.
Owner:SHANGHAI GENIUS ADVANCED MATERIAL (GRP) CO LTD
Polylactic acid/stem grafting ethylene vinyl acetate (EVA)/imvite nano composite materials and preparation method thereof
The invention belongs to the technical field of high polymer materials, and relates to polylactic acid / stem grafting ethylene vinyl acetate (EVA) / imvite nano composite materials and a preparation method thereof. The material comprises the components as follows by weight: 100 parts of polylactic acid, 10-50 parts of stem grafting EVA and 1-10 parts of organic modified imvite. According to the polylactic acid / stem grafting EVA / imvite nano composite materials and the preparation method thereof, the imvite is modified, layer distance is enlarged, and the fact that stem grafting EVA is intercalated in the imivite is easy is achieved. The grafting EVA has a strong intercalation capacity, a certain amount of organic modified imvite is enabled to be completely isolated, and isolated type nano composite materials are obtained. The stem grafting EVA is added, and therefore intercalation of the polylactic acid and isolating of the imivite of the polylactic acid / stem grafting EVA / imvite compound can be achieved. The stem grafting EVA is used as bulking agents, and meanwhile can enhance the toughness of polylactic acid composite materials.
Owner:SHANGHAI GENIUS ADVANCED MATERIAL (GRP) CO LTD
Hole site precision analysis method for circuit board drilling
InactiveCN104537247ABroaden research ideasProgramme controlComputer controlNumerical controlDrill down
The invention relates the technical field of numerical control drilling precision analysis, and discloses a hole site precision analysis method for circuit board drilling. The method comprises the following steps that first, drill-down is carried out by a drilling tool at a certain feeding speed; second, when the drilling tool is drilled into the drill entering surface of a circuit board, an error angle exists between the vertical center line of a spindle and the horizontal center line of the circuit board; third, the dynamic offset of the spindle of the drilling tool enables the drilling tool to be subjected to a component force in the horizontal direction; fourth, the action of the error angle and the dynamic offset of the spindle enables the drill point of the drilling tool to slip instantaneously; fifth, the drill-down is carried out by the drilling tool in an included angle instantaneously formed by the drill entering surface of the circuit board and the vertical direction; sixth, the negative deviation of the drill exiting surface of the circuit board is larger than the positive deviation of the drill entering surface of the circuit board, and a hole site deviation is formed. The hole site precision analysis method for the circuit board drilling uses a final accurate calculating formula of the hole site deviation value, the hole site deviation of the circuit board can be predicted at the early stage, and then the project optimization and the production operation can be guided.
Owner:GUANGZHOU FASTPRINT CIRCUIT TECH +2
Vehicle composite steering system and mode switching control method thereof
The invention discloses a vehicle composite steering system and a mode switching control method thereof, and the method comprises the steps: establishing a relation between an ideal yaw velocity and asteering wheel angle, and solving the ideal yaw velocity; establishing a composite steering system and a whole vehicle dynamic model; and designing a control method of the steering system in each steering mode according to the ideal yaw velocity, the composite steering system and the whole vehicle kinetic model. The advantages of a steer-by-wire system and a differential steering system are combined, the ideal yaw velocity is designed and tracked, and the yaw stability of the vehicle is improved.
Owner:NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
Method for preparing prefabricated kerbs through asphalt pavement surface layer milling material regeneration
ActiveCN110372262AImprove standardsFulfil requirementsPaving gutters/kerbsCrack resistanceSurface layer
The invention belongs to the technical field of road engineering materials, and particularly relates to a method for preparing prefabricated kerbs through asphalt pavement surface layer milling material regeneration. According to the following technical scheme, the prefabricated kerbs are prepared from the following components in parts by weight: 30-50 parts of an RAP material (0-5 mm), 30-40 parts of an RAP material (5-10 mm), 20-30 parts of an RAP material (10-20 mm), 0.2-0.55 part of a regenerative agent, 3.5-8 parts of a fiber enhancer, 4-6 parts of a stabilizer, 2-5 parts of new asphalt,8-15 parts of rubber powder, 20-25 parts of a corrosion-resistant agent, 2.5-3 parts of a waterproof and anti-oil agent, 5.2-8 parts of rosin and 5-10 parts of inorganic nano-ceramic heat-insulation coating. The prefabricated kerbs prepared in the mode that waste milling materials are subjected to special processes such as crushing, screening, recombinant regeneration, prefabrication and curing are extremely compact, high in strength, durable, long in service life, and high in oxidation resistance, low-temperature cracking resistance and corrosion (salt corrosion) prevention capacity.
Owner:LIAONING NEW DEV HIGHWAY TECH MAINTENANCE CO LTD
Steer-by-wire system stability control method
ActiveCN112026749AImprove lateral stabilityAccurate calculation of lateral forcesControl devicesDriving safetyDriver/operator
The invention discloses a steer-by-wire system stability control method. The method comprises the following steps that a four-wheel steer-by-wire system and a whole vehicle model are established; thefour-wheel cornering stiffness, the lateral vehicle speed and the yaw velocity are estimated by adopting an extended Kalman filter algorithm with limited gain; a sliding mode control algorithm is adopted to design an ideal yaw velocity and ideal lateral vehicle speed tracking controller, and stability control over the steer-by-wire system is completed. According to the method, the tire cornering stiffness of the four-wheel steering system and the relevant feedback state of the vehicle are estimated in real time, a robust tracking control strategy is designed to track the lateral vehicle speedand the yaw velocity of the vehicle, and the stability and the driving safety of the whole vehicle are improved while a driver instruction is responded.
Owner:NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
Detection method for adhesion rate and phagocytosis rate of phagocytes on baterial
InactiveCN106442277AAccurate AdhesionAccurate phagocytosis rateIndividual particle analysisTrypan blueMicrobiology
The invention discloses a detection method for the adhesion rate and the phagocytosis rate of phagocytes on bacterial. According to the detection method, phagocytes are divided into a control group, a treatment group and a untreated group, the control group cells are treated with trypan blue and cytochalasin D, the treatment group cells are treated with trypan blue or cytochalasin D, the untreated group cells are not treated, bacteria are labeled with CFDA-SE, and after the bacterial and cells interact, the adhesion rate and the phagocytosis rate of the phagocytes are detected through flow cytometry. According to the present invention, the adhesion rate and the phagocytosis rate of the phagocytes on pathogenic bacteria can be rapidly and accurately detected, and the whole experimental process does not exceed 3 h; the required operation steps after the interaction of the pathogenic bacteria and the phagocytes are less, such that the detection of the large batch sample can be performed; the required reagent is less and the price is economical so as to substantially reduce the scientific research cost; and the detection method is suitable for the adherently growing phagocytes and the difficult-detected phagocytes having the suspending growing state, and broaden the research idea to a certain extent.
Owner:SHANGHAI JIAOTONG UNIV SCHOOL OF MEDICINE
Derivatives and salts of diamino dihydrotriazine, and preparation method, composition and application thereof
ActiveCN103664972AStrong inhibitory activityBroaden research ideasAntibacterial agentsOrganic chemistryInfection diseaseDihydrofolate reductase inhibitor
The invention discloses derivatives and salts of damino dihydrotriazine, and a preparation method, a composition and application thereof. According to the invention, the preparation method of the damino dihydrotriazine derivative and the damino dihydrotriazine salt can be realized by adopting a method I or a method II, wherein the method I includes the step of obtaining a general formula I compound prepared through the reaction between a general formula IV compound and a general formula V compound, while the method II includes the step of mixing a general formula VIII compound with a general formula II compound under an acidic condition, and obtaining the compound shown in the general formula I through a cyclization reaction of the mixture. The invention also provides application of derivatives and salts of the damino dihydrotriazine in preparation of human dihydrofolate reductase inhibitors, preventing and curing drugs for tumor or bacterial infection diseases. The invention further provides a drug composition, which comprises an effective amount of the derivatives and / or salts of the damino dihydrotriazine, as well as pharmaceutically acceptable carriers. According to the invention, spiro heterocyclic ring derivatives of the damino dihydrotriazine have an excellent inhibitory activity on human dihydrofolate reductase, tumor cells and bacteria.
Owner:SHANGHAI INST OF PHARMA IND CO LTD +1
Method for preparing slump-retaining polycarboxylate water reducer by silylation of amino polyether end groups
Owner:中铁一局集团工业贸易有限公司
Method for preparing slump-retaining polycarboxylate water reducer by modifying polyether with silane coupling agent
The invention relates to a method using silane coupling agent modified polyether to prepare slump-loss-resistant polycarboxylate superplasticizer. The polycarboxylate superplasticizer is prepared by using a silane coupling agent, a polyether compound, an unsaturated carboxylic acid monomer and the like as the main reaction raw materials and sequentially performing hydrolysis, Williamson etherification, condensation and polymerization. The method specifically includes: hydrolyzing the halogenated silane coupling agent, allowing the hydrolyzed halogenated silane coupling agent to have Williamson etherification reaction with the polyether compound, allowing the etherification product to have condensation reaction with alkenyl silane coupling agent hydrolysate, and allowing the condensation product to have free radical polymerization reaction with unsaturated polyoxyethylene ether, a molecular weight regulator and the unsaturated carboxylic acid monomer under the effect of an initiator to prepare the polycarboxylate superplasticizer with multiple branched silane coupling agent modified polyether side chains. The method has the advantages that the method is simple and easy to control, high in polymerization degree, low in cost, energy-saving, efficient, environmentally friendly and free of pollution, a high steric-hindrance effect is achieved successfully, and the slump loss resistance of the prepared polycarboxylate superplasticizer is better than that of common polycarboxylate superplasticizer.
Owner:BEIJING UNIV OF TECH
A-pi-D-pi-A type BODIPY small molecular photovoltaic material and preparation method and application thereof
ActiveCN111808126ANarrow optical bandgapLower bandgapSolid-state devicesSemiconductor/solid-state device manufacturingOrganic synthesisAniline
The invention discloses an A-pi-D-pi-A type BODIPY small molecular photovoltaic material and a preparation method and application thereof, and belongs to the technical field of organic synthesis. According to the compound, carbazole, fluorene, indolocarbazole, phenothiazine, triphenylamine, benzodithiophene, indacenedithiophene, dithienopyrrole, cyclopentadithiophene and the like are used as electron donating units (D), and X-group and Y-group substituted BODIPY units (A) are bridged through different numbers of thiophene (pi) respectively. HOMO energy levels and band gaps of molecules are cooperatively regulated and controlled by utilizing different numbers of D units and pi bridges, so that the photoelectric conversion efficiency of the material is improved. The compound has the potential of becoming a high-efficiency and high-current organic small-molecule photovoltaic material, and broadens the research thought for developing BODIPY photovoltaic materials with different molecular skeletons.
Owner:DALIAN UNIV OF TECH
Preparation method of high mud-resistant concrete water reducer with graft copolymerized cationic side chains
ActiveCN106117468BAchieving a Transformation in Application PerformanceExpanding the theoretical connotation of the design-structure-performance of moleculesSide chainPolyethylene glycol
The invention discloses a preparation method of a highly mud resistant water reducing agent with graft copolymerization of a cation side chain for concrete, belonging to the field of water reducing agents. The highly mud resistant water reducing agent material with graft copolymerization of a cation side chain for concrete is synthesized by a method of carrying out cation side chain polymerization reesterification first and then graft copolymerization, i.e. an unsaturated cation quaternary ammonium salt monomer as a reactant carries out free radical polymerization in an oxidation-reduction initiation system composed of high-valence cerium salt and alcohols to obtain a terminal hydroxyl cation side chain, then unsaturated carboxylic acid, the terminal hydroxyl cation side chain and methoxy polyethylene glycol carry out esterification under the effect of a catalyst to produce two macromonomers, and then an unsaturated carboxylic acid monomer, a cation side chain macromonomer and a polyether side chain macromonomer as reactants carry out free radical graft copolymerization under the effects of an initiator and a chain transfer agent to obtain the highly mud resistant water reducing agent with graft copolymerization of the cation side chain for concrete. The process of the preparation method has the advantages of simple steps, high efficiency, immediacy, convenience in regulation and control, energy saving and environment protection, a composite side chain structure is synthesized creatively, and the effects of water reducing, slump loss resistance and inhibition in clay side effects are realized.
Owner:中铁一局集团工业贸易有限公司
Benzothiadiazole unit-based A-pi-A'-pi-A type acceptor photovoltaic material, and preparation method and application thereof
ActiveCN107652282AGood planarityImprove electron-attracting abilityOrganic chemistrySolid-state devicesSolubilityEnd-group
The invention discloses a benzothiadiazole unit-based A-pi-A'-pi-A type acceptor photovoltaic material, and a preparation method and an application thereof, and belongs to the field of organic photoelectric materials. The material adopts benzothiadiazole as a nucleus, adopts a nitro group and a 4-fluorophenyl group as end groups, and adopts a 2-cyano-styryl group as a pi connecting bond; and alkyl-modified thienyl groups are introduced to two sides of the benzothiadiazole unit in order to improve the solubility of the material, extend the conjugation length of a molecule and enhance the intramolecular charge transfer ability. The organic small molecular material obtains Jsc exceeding 1.0 mA cm<-2>, and has large redshifts being 34 nm and 38 nm respectively. The PCE of the material is increased from 0.1% to 1.0% and increases 10 times after replacing the nitro end group (M1) with the 4-fluorophenyl group (M2) due to the M2 having high Jsc and Voc, so the M2 material has higher potentialto be a high-efficiency non-fullerene small molecular acceptor photovoltaic material than the M1.
Owner:DALIAN UNIV OF TECH
Asymmetric organic small molecular photovoltaic material based on benzothiadiazole unit, preparation method and application thereof
ActiveCN107629047AImprove solubilityEnhanced charge transport capabilityOrganic chemistrySolid-state devicesSolubilityPhenyl-acetylene
Belonging to the field of photoelectric materials, the invention discloses a benzothiadiazole asymmetric organic small molecular photovoltaic material, a preparation method and application thereof. The D-Pi-A-A' type asymmetric molecule involved in the invention adopts benzothiadiazole as unit A, takes triphenylamine as unit D, employs phenyl, styryl, 2-cyano-styryl and phenylacetylene as Pi connecting bond respectively, and uses biscyanovinyl as the A' end group. In addition, different bridged bonds and the A' end group synergistically strengthen the ICT effect and reduce the HOMO energy level of the molecule. The 2-cyano-styryl connecting bond broadens the molecular absorption range. The introduction of phenyl or 2-cyano-styryl can reduce the HOMO energy level of the molecule, and Voc can exceed 1.0V. The PCE of the synthetic material is up to 2.43%. The compound has a clear structure, good solubility and film-forming properties, and has the potential of serving as an efficient asymmetric organic small molecular donor photovoltaic material.
Owner:DALIAN UNIV OF TECH
Method for detecting starch degrading microorganisms in tobacco leaf
ActiveCN106191209AReduce labor intensityLow costMicrobiological testing/measurementSample collectionTobacco leaf
The invention relates to a method for detecting starch degrading microorganisms in a tobacco leaf. The method for detecting the starch degrading microorganisms in the tobacco leaf comprises the specific steps of sample collection, sample treatment, sample dilution, cell separation, ultrasonic treatment, calibration and tracing of the starch degrading microorganisms, microscopic observation and the like. The method can be applied to tobacco leaves of different varieties, different positions and different maturity levels for flue-cured tobacco; the information of strain degrading flora in the tea leaf in an in-situ state is obtained; the labor intensity is decreased more greatly; the cost is lower; the operation process is simple and convenient; an operator does not need to be specially trained; a special requirement on a sampling position does not exist; the experimental result is accurate and errorless; relevant data can be quickly provided for a technician. Meanwhile, the method is also helpful to the technician to ascertain the specific fermentation and aroma enhancement mechanisms of the tobacco leaf, so as to better guide practices, explore and perfect the treatment technical measure and condition of the tobacco leaf, broaden and innovate the search thoughts of the fermentation technique of the tobacco leaf and positively carry out the search of a new field relevant to the method for detecting the starch degrading microorganisms in the tobacco leaf.
Owner:KUNMING UNIV
Method for preparing polycarboxylate superplasticizer with main chain modified isocyanate grafted positive ion side chain
The invention relates to a method for preparing a polycarboxylate superplasticizer with a main chain modified isocyanate grafted positive ion side chain and belongs to the field of the superplasticizer. The method comprises the following steps: by taking unsaturated carboxylic acid and unsaturated amide monomer as reactants, acquiring a polycarboxylic acid-amide main chain through free radical polymerization; further modifying the amide group on the main chain as isocyanate group; by taking unsaturated positive ion quaternary ammonium salt monomer as the reactant, performing free radical polymerization under an oxidation-reduction initiating system composed of high-price cerate and alcohol, thereby acquiring an end hydroxy positive ion side chain; performing grafting reaction on polycarboxylic acid main chain containing isocyanate with the end hydroxy positive ion side chain and the polyethylene glycol compound. The method has the advantages of simple and controllable process, low cost, energy-saving effect, high efficiency, polyethylene glycol and no pollution; the main chain modified isocyanate is grafted with the positive ion side chain and the polyether side chain according to a molecular structure design method; the double modification for main chain and side chain of molecule is successfully realized; the water-reducing collapse-protecting property and the capacity of restraining clay side effect are better than those of the common polycarboxylate superplasticizer.
Owner:BEIJING UNIV OF TECH
Preparation method and application of silicon-based MEMS gas sensor chip
PendingCN114014257AImprove consistencyImprove job stabilityTelevision system detailsImpedence networksEtchingThin membrane
The invention discloses a preparation method and application of a silicon-based MEMS gas sensor chip. The preparation method comprises the following steps: S1, depositing insulating materials on an upper surface of a silicon wafer substrate to obtain a cantilever supporting layer; S2, performing wafer-level metal deposition on a surface of the cantilever supporting layer to form a heating electrode; S3, depositing an insulating layer on a surface of the heating electrode in a wafer level mode; S4, preparing a corrosion window and a test electrode on a surface of the insulating layer in the wafer level mode; S5, depositing a bonding layer on a surface of the test electrode in the wafer level mode; S6, integrally preparing a gas-sensitive film on a surface of the bonding layer; S7, introducing corrosive liquid into the corrosion window, and carrying out wet etching on the silicon wafer substrate below an area where the gas-sensitive film is located to obtain a gas sensor wafer; and S8, performing scribing treatment on the gas sensor wafer to obtain a silicon-based MEMS gas sensor chip, wherein the bonding layer and the gas-sensitive film are made of the same materials. The gas sensor chip obtained by the invention has excellent gas-sensitive properties such as high stability and high sensitivity, and compatible manufacturing of a silicon-based gas-sensitive film is realized.
Owner:HUAZHONG UNIV OF SCI & TECH
Method for preparing macro-monomer synthesized polycarboxylate water reducer through alcoholysis of alkenyl-acyl chloride
ActiveCN106117461AExpand the theoretical connotationThe polymerization process is mild and stableIonEther
A method for preparing a macro-monomer synthesized polycarboxylate water reducer through alcoholysis of alkenyl-acyl chloride belongs to the field of water reducers. The method comprises the following steps: firstly polymerizing a cationic chain, and then reacting with the alkenyl-acyl chloride, thus obtaining a macro-monomer; then carrying out copolymerization on the macro-monomer and a carboxylic acid micro-monomer, i.e., polymerizing under an oxidization-reduction initiating system formed by high-valence cerate and alcohols by taking an unsaturated cationic quaternary ammonium salt monomer as a reactant, thus obtaining a terminal hydroxyl cationic long chain; then respectively enabling the terminal hydroxyl cationic long chain and polyethylene glycol monomothyl ether to react with the alkenyl-acyl chloride respectively, thus preparing macro-monomers with different structures; then carrying out free radical polymerization on the macro-monomers and unsaturated carboxylic acid micro-monomers, thus obtaining the macro-monomer composite polycarboxylate water reducer. According to the method disclosed by the invention, the macro-monomers with different structures and functions are successfully synthesized through ways of polymerizing the cationic chain and respectively reacting with the alkenyl-acyl chloride by combining polyether, and a novel comb-structure polycarboxylate water reducer which takes a polycarboxyl acid as a main chain and the cationic long chain and the polyether as polybasic side chains can be finally obtained. A reaction technology is simple and easy, and multiple excellent effects of retaining slump through reducing water, resisting clay, and the like are realized.
Owner:BEIJING UNIV OF TECH
Benzotriazole small-organic-molecule photovoltaic material and preparation method and application thereof
InactiveCN105348274ARaise the onset oxidation potentialExtended conjugate lengthOrganic chemistrySolid-state devicesSolubilityEnd-group
The invention discloses a benzotriazole small-organic-molecule photovoltaic material and a preparation method and application thereof and belongs to the field of photoelectric materials. The compound uses benzotriazole as a nucleus, uses triphenylamine as an end group and uses thiophene, a single bond, C = C or C=C as connecting keys respectively. After fluorine atoms having higher electronegativity are introduced to the benzotriazole, the initial oxidation potential of the material is improved. The triphenylamine is used as the end group, so that the electron donating capability of molecules is enhanced, the hole-transporting performance is improved, and the solubility of the compound is improved in coordination with an alkyl group on the benzotriazole. The C = C is introduced in the molecules, so that the absorption range of the compound is widened. The single bond or the C = C is introduced so that the HOMO energy level can be effectively reduced. The VOC of a device is improved through coordination of the single bond or the C = C introduced in the molecules and the monofluoro benzotriazole. The PCE of the synthetic material is above 1.70%, the highest PCE is up to 4.77%, and the benzotriazole small-organic-molecule photovoltaic material has the potential of serving as an efficient small-organic-molecule photovoltaic donor material.
Owner:DALIAN UNIV OF TECH
Anti-fasciola gigantica Cat L1 monoclonal antibody as well as preparation method and application thereof
PendingCN113416255ABroaden research ideasBiological material analysisFused cellsBALB/cAntiendomysial antibodies
The invention belongs to the technical field of biology, and discloses an anti-fasciola gigantica Cat L1 monoclonal antibody as well as a preparation method and application thereof, and the preparation method of the anti-fasciola gigantica Cat L1 monoclonal antibody comprises the following steps: performing mouse immunization; constructing a hybridoma cell strain; and carrying out monoclonal antibody preparation and sensitivity identification. According to the invention, expression rFgCat L1 is utilized to immunize five BALB / c mice, the mice with the highest antibody reaction are taken, splenocytes are separated and fused with SP 2 / 0 cells, and a positive hybridoma cell strain is constructed. 47 parts of buffalo serum and 47 parts of goat serum which are detected to be positive through an indirect ELISA method in the early stage are detected through the method, and the coincidence rates of positive results reach 72.3% and 78.7%. The anti-rFgCatL1 monoclonal antibody is successfully prepared, a fascioliasis double-antibody sandwich ELISA detection method is constructed, and a theoretical basis is provided for research and development of a low-cost and rapid diagnostic kit.
Owner:GUANGXI UNIV
Method for preparing concrete water reducing agents from polycarboxylic acid modified acyl halide grafted composite side chains
The invention discloses a method for preparing concrete water reducing agents from polycarboxylic acid modified acyl halide grafted composite side chains, and belongs to the field of water reducing agents. By the aid of the method for polymerizing main chains, modifying acyl halide, polymerizing cationic side chains and then carrying out grafting reaction, polycarboxylic acid modified acyl halide grafted composite side chain type concrete reducing agent materials which are excellent in performance can be prepared. The method includes carrying out free radical polymerization on unsaturated carboxylic acid monomers to obtain the polycarboxylic acid main chains; modifying carboxylic acid groups on the main chains to obtain acyl halide groups; forming oxidation-reduction initiation systems from high-valence ceric salt and alcohol, initiating polymerization of unsaturated cationic quaternary ammonium salt monomers by the aid of the oxidation-reduction initiation systems to obtain the hydroxyl-terminated cationic side chains; carrying out the grafting reaction on the polycarboxylic acid main chains with the acyl halide groups, the hydroxyl-terminated cationic side chains and polyethylene glycol compounds to obtain the concrete water reducing agents. The method has the advantages that owing to modes for modifying the acyl halide by polycarboxylic acid and grafting the cationic side chains and polyethylene glycol side chains, composite side chain structures can be synthesized, reaction procedures are simple and are easy to control, energy can be saved, the method is high in efficiency, and excellent water reduction slump retaining and high-resistant clay composite effects can be realized.
Owner:BEIJING UNIV OF TECH
Method for preparing prefabricated slope hexagonal protection block by regenerating asphalt pavement surface layer milling material
ActiveCN110451851BRaw materials are easy to getImprove standardsPlastic recyclingExcavationsRoad engineeringThermal insulation
Owner:北方道路科技(辽宁)有限公司
A method for preparing prefabricated drainage channels by recycling asphalt pavement surface layer milling materials
ActiveCN110342849BImprove standardsRaw materials are easy to getSewerage structuresSolid waste managementRoad engineeringThermal insulation
The invention belongs to the technical field of road engineering materials, and in particular relates to a method for preparing prefabricated drainage channels by regenerating asphalt pavement surface layer milling materials. The technical solution is as follows: It is prepared from the following components, by weight: 20-40 parts of RAP material (0-5mm), 25-30 parts of RAP material (5-10mm), 15 parts of RAP material (10-20mm) 1-25 parts, 0.1-0.4 parts of regenerant, 3-6 parts of fiber reinforcement, 3-5 parts of stabilizer, 1-4 parts of new asphalt, 7-10 parts of rubber powder, 18 parts of anti-corrosion agent ~ 22 parts, 2.5 ~ 3 parts of waterproof and oil resistant agent, 4.2 ~ 6 parts of rosin, 3 ~ 6 parts of inorganic nano-ceramic heat insulation coating. In the present invention, the prefabricated drainage tank made by special processes such as crushing, screening, recombination and regeneration, prefabrication, and health preservation of waste milling and planing materials is extremely dense, high-strength and durable, with long service life, anti-oxidation, low-temperature anti-cracking, and anti-corrosion (salt) eclipse) ability.
Owner:北方道路科技(辽宁)有限公司
Cross-organization business process model mining and compliance checking method and system
PendingCN113780844ABreak through limitationsAccurate analysisDigital data information retrievalResourcesLog miningInter organizational
The invention discloses a cross-organization business process model mining and compliance checking method and system. The method comprises the following steps: 1) acquiring a cross-organization business process event log; 2) mining a business process model of each organization and a cooperation mode existing between any two organizations by using the obtained cross-organization business process event logs; 3) integrating the mined business process models of different organizations and cooperation modes between the organizations to obtain a global cross-organization business process model; 4) performing compliance check on the business process model of each organization and the cooperation mode between the organizations in the mined cross-organization business process event log; and 5) performing compliance check on the global cross-organization business process model and obtaining a conclusion. The cross-organization business process models in various scenes can be mined, and the problem that the mined cross-organization business process models cannot be effectively measured through an existing compliance checking method is solved.
Owner:北京杰成合力科技有限公司
Who we serve
- R&D Engineer
- R&D Manager
- IP Professional
Why Patsnap Eureka
- Industry Leading Data Capabilities
- Powerful AI technology
- Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.
© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com