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38 results about "Strength function" patented technology
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Functional strength is the ability to run your load-joints (shoulders, hips, knees, and ankles) through a full range of motion without pain, stiffness, or restriction. This is also known as load-joint articulation.
Super-early-strength PCE (polycarboxylate ether) superplasticizer and preparation method thereof
The invention provides a super-early-strength PCE (polycarboxylate ether) superplasticizer. The super-early-strength PCE superplasticizer is a compound shown in formula (I) and is synthesized with active macro-monomers used as raw materials, the space hindrance effect of the superplasticizer is further improved, and meanwhile, positive ions with good cement resistance are introduced in molecules, so that the superplasticizing rate, the cement resistance and the cement adaptability of the superplasticizer are increased. The superplasticizer has better tolerance and cannot have a continuous intercalation reaction with the cement. The positive ions of the super-early-strength PCE superplasticizer can inhibit expansion of the cement so as to reduce adsorption of the cement to an additive. The super-early-strength PCE superplasticizer can accelerate the hydration function of the cement and has the super-early-strength function. The super-early-strength PCE superplasticizer has super-early-strength and cement-resistant functions in common concrete.
Owner:GUANGDONG REDWALL NEW MATERIALS
Physical simulating method and device during continuous-casting billet coagulation tissue growth process
InactiveCN101075287AAnalogue processes for specific applicationsMovement controlUltimate tensile strength
A method for physically simulating growth process of condensed organization on continuous casting billet includes three function-control programs of heating function-control program and cooling strength function-control program as well as drawbar tensile rate function-control program. The special device used for realizing said method consists of heating unit, driving unit, motion control unit, cooling unit and temperature measurement-control unit. The said units are controlled and operated by industrial control computer and computer with function curve software.
Owner:SHANGHAI UNIV
Cement concrete early strength agent and early strength and water reduction agent
The invention relates to a cement concrete early strength agent. The cement concrete early strength agent contains nano calcium carbonate and light calcium powder. Preferably, the cement concrete early strength agent further contains calcium formate and one or more kinds of calcium nitrate. The cement concrete early strength agent comprises, by mass, 20-67 parts of nano calcium carbonate, 33-80 parts of light calcium powder, 0-10 parts of calcium formate and 0-10 parts of calcium nitrate. Compared with an existing early strength agent, the cement concrete early strength agent has the most outstanding advantages that no harmful ions are introduced, the use environment is prevented from being polluted, and the cement concrete early strength agent is nontoxic and harmless; in addition, cement concrete early strength can be improved, and the primary solidification time and final solidification time of cement concrete are shortened. The invention further relates to an early strength and water reduction agent containing the cement concrete early strength agent. The early strength and water reduction agent comprises, by mass, 60%-75% of early strength components and 25%-40% of water reducing components. The early strength and water reduction agent has a good early strength function, a good water reduction function and a good strengthening function, the water reduction rate is high, the early strength of concrete can be remarkably improved, and later strength is not affected.
Owner:贵州华烁兴源科技材料有限公司
Neural network model-based optical proximity correction method
The invention discloses a neural network model-based optical proximity correction method. The neural network model-based optical proximity correction method comprises the following steps of S01, training a neural network model, wherein M test patterns are selected on a training optical mask, target patterns corresponding to the M test patterns are respectively obtained, a similar strength functionI-bar (X, Y) is simulated by a known perception neural network, and the perception neural network is trained according to the similar strength function and the target patterns to obtain the neutral network model; and S02, achieving optical proximity correction by the trained neutral network model, in which the similar strength function I-bar (X, Y) of an optical mask to be processed is obtained by the obtained neutral network model, the similar strength function I-bar (X, Y) is cut by a cutting threshold to generate the optical mask containing the target patterns, and photoetching is performed by employing the optical mask containing the target patterns as a mask after the optical proximity correction. The optical proximity correction method disclosed by the invention is simultaneously compatible with corrected image quality and relatively rapid implementation speed.
Owner:SHANGHAI INTEGRATED CIRCUIT RES & DEV CENT
Polycarboxylate superplasticizer with super high early strength and preparation method of polycarboxylate superplasticizer
ActiveCN105271900AIncreased steric hindranceHigh water reduction rateIntercalation reactionSuperplasticizer
The invention provides a polycarboxylate superplasticizer with super high early strength. The polycarboxylate superplasticizer with super high early strength is a compound shown in the formula (I) and is synthesized with an active macromonomer as the raw material, cations are introduced into molecules while the steric hindrance effect of the superplasticizer is further improved, the cations have good soil resistance, so that the water-reducing rate of the superplasticizer is increased, and the soil resistance and the cement adaptability of the superplasticizer are improved. The polycarboxylate superplasticizer has better tolerance for soil and does not have an intercalation reaction with the soil. The cations of the polycarboxylate superplasticizer with super high early strength can inhibit soil expansion, so that admixture adsorption by the soil is reduced. The polycarboxylate superplasticizer with super high early strength can accelerate hydration of cement and has the super high early strength function. The polycarboxylate superplasticizer with super high early strength has super high early strength and soil resistance functions when applied to common concrete.
Owner:GUANGDONG REDWALL NEW MATERIALS
Filtering algorithm based on self-adaptive new target strength
InactiveCN104501812AEasy to trackIncrease the scope of applicationNavigational calculation instrumentsRadio wave reradiation/reflectionMulti target trackingFilter algorithm
The invention discloses a PHD (probability hypothesis density) filtering algorithm based on self-adaptive new target strength. The PHD filtering algorithm is implemented through the following steps: carrying out track initiation and track confirmation; constructing a strength function of a new target random set according to confirmed track initiation position information; merging a new target strength function constructed by current frames with a known new target strength function at previous moment so as to produce an adaptive new target strength function of the current frames; starting a PHD filter by using the adaptive new target strength function so as to complete the prediction and updating of the PHD filter; and carrying out multiple target state extraction. According to the Bayesian multiple target tracking method based on the filtering algorithm, a new target strength function is constructed only according to measurement information completely without using priori information. The algorithm can be used for solving the problem that an original PHD filter lacks a new target tracking function. The algorithm has the advantages that a new target of which the position is unknown can be tracked well, so that the application range is enlarged, the robustness of the PHD filter is improved, and the like.
Owner:JIANGNAN UNIV
A super high-early-strength polycarboxylic acid water reducer and a preparing method thereof
A super high-early-strength polycarboxylic acid water reducer is disclosed and belongs to the field of concrete admixtures. The water reducer includes, by weight, 300-400 parts of a polyether monomer having a molecular weight of 5000, 450-590 parts of deionized water, 1.5-3 parts of an initiator, 25-35 parts of a monomer C, 15-25 parts of a monomer D, 1.5-2.5 parts of a chain transfer, 0.6-0.9 part of a reductant and a proper amount of an inorganic alkali. Through molecular structure modification, characteristic groups having early strength functions are introduced, and the chain transfer is used to regulate the molecular weight of polymer, and therefore the water reducer has characteristics of a low doping amount, a high water reduction rate, wide adaptability, and capability of allowing a prefabricated part to reach a demoulding strength in prescribed time in a case of no steam curing and to have clean and beautiful appearance.
Owner:SHIJIAZHUANG CHANGAN YUCAI BUILDING MATERIALS
Preparation method of modified polycarboxylic acid slump-retaining agent masterbatch
The invention discloses a preparation method of modified polycarboxylic acid slump-retaining agent masterbatch. The method includes the following steps that 1, polyether macromonomers and water in a certain proportion are added into a reaction kettle and stirred for dissolution; 2, an oxidizing agent is added at a time at 5-25 DEG C, and an initiating agent and a micromonomer solution start to be dropwise added in sequence within 5 min after the oxidizing agent is added; 3, an AMPS solution is added at a time or dropwise added a / 3 h after the micromonomer solution is added; 4, curing is carried out for 1-2 h after dropwise addition is finished, liquid alkali is slowly added when the temperature of the reaction solution is lower than 30 DEG C, water is supplemented, and the mixture is stirred to be uniform and then still standing for 10-15 h. The preparation method is simple in process, the phenomenon of pipeline blocking caused by AMPS homopolymerization or copolymerization is eradicated to the maximum, and the obtained slump-retaining agent has a slow release slump-retaining function and a certain early strength function and has a good application effect when used in cooperation with a water reducing agent with a high water reducing rate.
Owner:HUBEI UNIV OF TECH
Super-early-strength polycarboxylate superplasticizer and preparation method thereof
The invention provides a super-early-strength polycarboxylate superplasticizer. The super-early-strength polycarboxylate superplasticizer is a compound shown as the formula (I) and is synthesized with active large monomers as raw materials, the steric-hinerance effect of the superplasticizer is further improved, meanwhile, positive ions are introduced into molecules, the positive ions have good mud resistance, and therefore the water-reducing rate of the superplasticizer is increased, and the mud resistance and adaptability to cement of the superplasticizer are improved. Better tolerability to mud is achieved, and no continuous inserting layer reaction is generated by the superplasticizer and mud. The positive ions of the super-early-strength polycarboxylate superplasticizer can restrain expansion of mud, and therefore the adsorption of mud on an additive is reduced. The super-early-strength polycarboxylate superplasticizer can accelerate the hydration function of cement and has the super early strength function. The super-early-strength polycarboxylate superplasticizer has the super early strength and mud resisting functions in common concrete.
Owner:河北红墙新材料有限公司
Hot-rolled TRIP steel with tensile strength being 900 MPa level and preparation method thereof
The invention provides hot-rolled TRIP steel with tensile strength being the 900 MPa level and a preparation method thereof. The steel comprises, by chemical mass percentage, 0.10-0.30% of C, smallerthan or equal to 0.10% of Si, 4-8% of Mn, smaller than or equal to 0.01% of P, smaller than or equal to 0.008% of S, 1.0-2.0% of Al, smaller than or equal to 0.04% of Nb, smaller than or equal to 0.10% of V and the balance Fe and inevitable impurities. By means of control over chemical components, hot-rolling technology parameters and the heat treatment technology, after ferrite and austenite two-phase areas (Ac1-Ac3) are annealed, the finished product TRIP steel with the texture state being ferrite, bainite and residual austenite, by means of addition of micro alloy element Nb and V, C and Nin the steel can be fixed, the adverse influence of AlN to thermoplasticity is eliminated, and the refined crystalline strengthening and precipitation strength functions are played effectively. The rare earth element is added, and the functions of reducing alloy segregation and refining as-cast structure can be achieved. The tensile strength of the product is larger than or equal to 900 MPa, the ductility after breakage is larger than or equal to 25%, the product of strength and elongation can reach 25-30 GPa%, the requirements for the light weight, energy saving and consumption reducing of car industry are fully met, and the steel has good economy and application prospect.
Owner:SHOUGANG CORPORATION +1
Concrete early strength agent and preparation method thereof
ActiveCN106243289AHigh water reduction rateGood early strengthCompressive strengthUltimate tensile strength
The invention relates to a concrete early strength agent and a preparation method thereof and aims to provide a concrete early strength agent which has water-reducing and early strength functions and can rapidly raise early strength of concrete after being doped and a preparation method thereof. The concrete early strength agent is obtained by free radical polymerization of VPEG, any one ingredient selected from a group consisting of methacrylic acid, acrylic acid and maleic anhydride, acrylamide or maleimide, and octadecyl methacrylate. The prepared concrete early strength agent has high water-reducing rate and excellent early strength performance. When solid volume discount is 0.2%, the water-reducing rate can reach 30% and above, 1d compressive strength rate of concrete reaches 240% and above, and 3d compressive strength rate reaches 220% and above. During production of a prefabricated part in winter, steam curing time can be shortened. During production in summer, the steam-curing process can be avoided. Thus, energy consumption is greatly reduced, and production cost of the prefabricated part is lowered.
Owner:CHONGQING SANSHENG IND CO LTD
Passive radar fixed target frequency domain direction-finding method based on external radiation source
InactiveCN105137388AReduce computationImprove robustnessRadio wave finder detailsRadio wave direction/deviation determination systemsPassive radarFindings methods
The invention discloses a passive radar fixed target frequency domain direction-finding method based on an external radiation source. The passive radar fixed target frequency domain direction-finding method comprises the steps of establishing a direction-finding system model; deducing a slant range progress of a single-scattering-point target; deducing a demodulated single-scattering-point target echo signal model and performing variable substitution for obtaining a frequency domain expression; expanding the frequency domain expression of the single-scattering-point target echo signal to a multi-target condition, modifying a target scattering strength function, and obtaining a relationship between the frequency domain expression of a multi-target echo signal and the modified target strength function; and calculating the direction of each target by means of a polar coordinate algorithm. The passive radar fixed target frequency domain direction-finding method is realized based on a narrow-band external radiation source signal in a two-dimensional space; the polar coordinate algorithm is used; and convolution operation is performed. The convolution operation can be processed through fast Fourier transform and inverse transformation, thereby greatly reducing calculation amount of the algorithm, realizing high robustness, obtaining relatively high direction finding precision and simultaneously finding a plurality of target directions in an observing area.
Owner:ZHOUKOU NORMAL UNIV
Reactive intermediate and reactive macromonomer
The invention provides a reactive intermediate. The reactive intermediate can be used for preparation of a reactive macromonomer. A preparation method has the advantages of simplicity and convenience in operation, high yield and the like. The reactive macromonomer can improve the steric hindrance effect among cement particles, can effectively avoid an intercalation function of PEO (polyoxyethylene) side chains and has good clay resistance. A super-high early-strong polycarboxylate superplasticizer synthetized with the reactive macromonomer as a main raw material can promote the hydration function of cement and accelerate strength development of hardened cement and performs a super-high early-strength function; the problem of poor dispersion performance of existing PCEs (polycarboxylate superplasticizers) in the concrete containing clay can be effectively solved, representation and tests show that the super-high early-strong polycarboxylate superplasticizer synthetized with the reactive macromonomer as the main raw material has good dispersion performance for the concrete with or without the clay, and the dispersion performance of the PCEs in the concrete containing the clay is better than that of traditional PCEs.
Owner:陕西红墙新材料有限公司
Early strength type polycarboxylic acid water reducer and preparation method thereof
The invention discloses an early strength type polycarboxylic acid water reducer and a preparation method thereof. The early strength type polycarboxylic acid water reducer is prepared through steps of synthesizing a macromonomer by utilizing polyether with an early strength function, introducing a polymerized small monomer with the early strength function in a synthesis process and adopting a double-dropping manner according to a free radical polymerization principle under the action of an oxidization-reduction initiation system. The early strength type polycarboxylic acid water reducer provided by the invention has good dispersion performance and has the effect of remarkably improving the early strength; the early strength type polycarboxylic acid water reducer is remarkably better thana common polycarboxylic acid water reducer and a common naphthalene series water reducer for pipe piles.
Owner:武汉奥克化学有限公司
Early strength type polycarboxylic acid high performance water reducing agent and preparation method thereof
The invention provides an early strength type polycarboxylic acid high performance water reducing agent. A dendritic macromolecule copolymerized monomer taking methacrylic acid terminated hexanediamine as a core is introduced, and early strength properties of hyperbranched and amide groups of a dendritic macromolecule are utilized; then an isocrotyl polyoxyethylene ether macromonomer with high molecular weight is introduced and the long-side-chain steric hindrance and early strength functions are utilized; finally, the early strength effect is further enhanced by utilizing an unsaturated acylamino small molecule. The early strength type polycarboxylic acid high performance water reducing agent provided by the invention is the early strength type polycarboxylic acid high performance water reducing agent with obvious early strength effect and excellent comprehensive performance. Meanwhile, the invention provides a preparation method of the early strength type polycarboxylic acid high performance water reducing agent; the method comprises the steps of firstly preparing the dendritic macromolecule copolymerized monomer taking the methacrylic acid terminated hexanediamine as the core and then preparing the early strength type polycarboxylic acid high performance water reducing agent; the preparation method has the advantage of simple steps.
Owner:广东瑞安科技实业有限公司
Manufacturing and mounting method of steel-plastic composite pipeline for gathering and transportation in oil field
The invention provides a manufacturing and mounting method of a steel-plastic composite pipeline for gathering and transportation in an oil field. According to the method, steel-plastic composite pipes are prepared firstly, and then plastic pipes of the steel-plastic composite pipes are connected with steel pipes after subjected to fusion welding connection during mounting of the pipeline, so that the whole pipeline does not have seams or weak parts; the lining plastic pipes are firmly combined with the steel pipes, the strength function, the corrosion-resistant function and the non-leakage sealing function of the steel-plastic composite pipes can be fully performed during gathering and transporting of fluids, the high-temperature, high-pressure and high-corrosion fluids can be conveyed for a long distance safely and reliably, maintenance of the steel-plastic composite pipeline for gathering and transportation can be reduced, the gathering and transportation efficiency is improved, and the service life of the pipeline is remarkably prolonged.
Owner:CHANGCHUN UNIV OF TECH
Concrete admixture and preparation method
ActiveCN108503251APromote green developmentGood water reduction effectOrganic acidGreen Tea Polyphenols
The invention provides a concrete admixture and a preparation method. Tea is ground, water is added, the mixture is boiled, and an exciting agent, namely, a tea extracting solution is obtained for later use; theophylline, tea polyphenol and the exciting agent, namely, the tea extracting solution are weighed in a weight ratio, mixed and stirred uniformly; the concrete admixture is obtained throughintermittent mixing under the ultrasonic condition. Effective components of tea are mainly taken as a basis, natural components including theophylline and tea polyphenol in tea are sufficiently utilized for admixture preparation, the tea extracting solution is taken as the excitant, and excitation is performed through multiple amino acids, vitamins, organic acid, lipopolysaccharide, saponin, sterol and the like in the tea extracting solution. The water reducing function and the early strength function of the natural components of the tea on concrete are played, and the concrete admixture has very high social value and ecological value.
Owner:长春昌驰环保科技有限公司
Allyl sulfonic glycerin polyoxyethylene polyoxypropylene ether polycarboxylic acid water reducer and its synthesis method
The invention provides an allyl sulfonic glycerin polyoxyethylene polyoxypropylene ether polycarboxylic acid water reducer and its synthesis method. Belonging to the field of concrete admixtures, the water reducer is a polymer of allyl sulfonic glycerin polyoxyethylene ether or allyl sulfonic glycerin polyoxypropylene ether (unit A) and unsaturated carboxylic acid and its derivative (unit B). According to the synthesis method provided in the invention, 500-6000 structural unit A is adopted as a polymerization monomer to undergo random free radical copolymerization in an aqueous system. Due to the introduction of a long chain of allyl sulfonic glycerin into a side chain, the water reducer has an early strength function, thus changing the mode of achieving an early strength effect only through compounding an early strength agent. Additionally, the water reducer provided in the invention has a simple synthesis process, good compatibility and good adaptability, and facilitates substantial improvement of the production efficiency and production benefits.
Owner:LIAONING OXIRANCHEM INC
A slotting parameter extraction method for oil pipe electronic tag implantation
ActiveCN109635900AImprove intelligenceHigh speedDrilling rodsCo-operative working arrangementsCouplingStress functions
The invention provides a slotting parameter extraction method for oil pipe electronic tag implantation. The slotting parameter extraction method comprises the following steps that the length A, the width B and the height G of an electronic tag are obtained; ANSYS simulation analysis is carried out to obtain the width W2 of the allowable slotting of the stress state of the tubing coupling, the depth H2 of the allowable slotting and the length L2 of the allowable slotting; The value ranges of the length L, the width W and the depth H of the electronic tag mounting groove are obtained; with the value range of the width W and the depth H of the electronic tag mounting groove fitting a functional relationship between the coupling stress and the stress function to obtain the yield strength of the material for the tubing coupling and the length L of the slot; fitting a function relationship between the radio frequency signal strength and the radio frequency signal strength function to obtaina second association relationship between the signal source strength required for receiving the radio frequency signal within a certain range and the length L, width W and depth H of the slot; And solving the first association relationship and the second association relationship to obtain accurate values of the length L, the width W and the depth H of the slot.
Owner:WUHAN HAIWANG TECH
Early strength type polycarboxylic type water reducer and preparation method thereof
The invention relates to an early strength type polycarboxylic type water reducer and a preparation method thereof. TPEG and 3-allyloxy-1-hydroxy propanesulfonic acid which have fast dispersion, highdispersion and excellent water reduction functions, monomers formic acid and dimethylaminoethyl acrylate, 3-acryloyloxy-2-hydroxypropyltrimethyl ammonium chloride and N-hydroxyethyl-N'-acroloyl-urea which have the early strength function as well as monomer 3-acryloyloxy-2-hydroxypropyltrimethyl ammonium chloride and methoxyethoxyethyl acrylate which have the slump retaining function are introducedin the synthesis process, and after the reaction ends, triethanolamine with the early strength and triisopropanolamine with later strength are used for neutralization. The synthesized early strengthtype polycarboxylic type water reducer has outstanding fast dispersion, high dispersion and rapid hydration functions, the enhancement effect is notable by blending the early strength type water reducer in concrete, the early strength is substantially improved, the later strength can be stably developed, and high strength and good durability of concrete are realized.
Owner:HEBEI SANKAISHENFA SCI & TECH CORP LTD
Early-strength-type polycarboxylic acid high-performance water reducer and preparation method thereof
The invention discloses an early-strength-type polycarboxylic acid high-performance water reducer. The early-strength-type polycarboxylic acid high-performance water reducer is capable of, through introducing a dendritic macromolecule comonomer using methacrylic acid end-capped butanediamine as a nucleus, using an early strength feature of a hyperbranched and amide group of a dendritic macromolecule, and through introducing an isoprenyl polyoxyethylene ether macromonomer of a large molecular weight, using a long side chain steric hindrance and an early strength function thereof, finally further reinforcing the early strength effect by using an unsaturated sodium sulfonate micromolecule. The early-strength-type polycarboxylic acid high-performance water reducer is remarkable in early strength effect, and excellent in comprehensive performance. The invention further discloses a preparation method for the early-strength-type polycarboxylic acid high-performance water reducer. The preparation method is capable of firstly preparing the dendritic macromolecule comonomer using the methacrylic acid end-capped butanediamine as the nucleus, and preparing the early-strength-type polycarboxylic acid high-performance water reducer. The preparation method has the advantage of simple process.
Owner:广东瑞安科技实业有限公司
Preparation method of monomer-terminated amine ether for synthesizing early-strength polycarboxylate superplasticizer
The invention discloses a preparation method of monomer-terminated amine ether for synthesizing an early-strength polycarboxylate superplasticizer. The method comprises the following steps: (1) synthesizing block monomer amine ether; (2) refining the block amine ether; and (3) preparing monomer-terminated amine ether. The method provided by the invention has simple process control, stable productstructure and excellent product performance. In the method, a one-step synthesis method different from conventional synthesis methods of alcohols, amine initiators and epoxides is adopted, and throughsynthesis and refining of EO-PO-EO type specific block amine ether and a key technology for terminating amine ether, nitrogen element is introduced into a final polycarboxylate superplasticizer and aprimary hydroxyl group is eliminated through terminating. The polycarboxylate superplasticizer synthesized by the method not only improves an early strength function, but also appropriately reduces an air entraining content, thus further expanding the application of the polycarboxylate superplasticizer in the field of concrete.
Owner:FUSHUN DONGKE FINE CHEM
An early-strength polycarboxylate high-performance water reducer and its preparation method
The invention discloses an early-strength-type polycarboxylic acid high-performance water reducer. The early-strength-type polycarboxylic acid high-performance water reducer is capable of, through introducing a dendritic macromolecule comonomer using methacrylic acid end-capped butanediamine as a nucleus, using an early strength feature of a hyperbranched and amide group of a dendritic macromolecule, and through introducing an isoprenyl polyoxyethylene ether macromonomer of a large molecular weight, using a long side chain steric hindrance and an early strength function thereof, finally further reinforcing the early strength effect by using an unsaturated sodium sulfonate micromolecule. The early-strength-type polycarboxylic acid high-performance water reducer is remarkable in early strength effect, and excellent in comprehensive performance. The invention further discloses a preparation method for the early-strength-type polycarboxylic acid high-performance water reducer. The preparation method is capable of firstly preparing the dendritic macromolecule comonomer using the methacrylic acid end-capped butanediamine as the nucleus, and preparing the early-strength-type polycarboxylic acid high-performance water reducer. The preparation method has the advantage of simple process.
Owner:广东瑞安科技实业有限公司
A method for manufacturing and installing steel-plastic composite pipelines for oilfield gathering and transportation
The invention provides a manufacturing and mounting method of a steel-plastic composite pipeline for gathering and transportation in an oil field. According to the method, steel-plastic composite pipes are prepared firstly, and then plastic pipes of the steel-plastic composite pipes are connected with steel pipes after subjected to fusion welding connection during mounting of the pipeline, so that the whole pipeline does not have seams or weak parts; the lining plastic pipes are firmly combined with the steel pipes, the strength function, the corrosion-resistant function and the non-leakage sealing function of the steel-plastic composite pipes can be fully performed during gathering and transporting of fluids, the high-temperature, high-pressure and high-corrosion fluids can be conveyed for a long distance safely and reliably, maintenance of the steel-plastic composite pipeline for gathering and transportation can be reduced, the gathering and transportation efficiency is improved, and the service life of the pipeline is remarkably prolonged.
Owner:CHANGCHUN UNIV OF TECH
Limestone powder mineral admixture special for concrete and preparation method thereof
InactiveCN101560075BImprove workabilityImprove performanceEconomic benefitsUltimate tensile strength
The invention relates to an admixture for concrete and a preparation method thereof. A limestone powder mineral admixture special for the concrete is characterized in that the admixture is prepared by mixing and grinding limestone powder, citric acid, oxalic acid and quartz powder; the admixture comprises the following raw materials in portion by weight: 10,000 portions of the limestone powder, 3to 10 portions of the citric acid, 40 to 60 portions of the oxalic acid and 400 to 600 portions of the quartz powder; and the content of calcium carbonate in the limestone powder is not lower than 85 percent, and the specific surface area is between 500 and 700 m<2> / kg. The admixture has better early strength function, has small influence on later strength, has good retarding effect, greatly improves the performance of the concrete, and can obtain better economic benefit.
Owner:武汉混凝土协会
A method for obtaining accurate rainfall data based on equivalent rainfall intensity
ActiveCN109507761BImprove compatibilityGood effectRainfall/precipitation gaugesComputer scienceStrength function
The present invention proposes a method for obtaining accurate rainfall data based on equivalent rain intensity, which is characterized in that, based on the tipping bucket rain sensor, it includes the following steps: Step S1: under the conditions of the test environment, different constant rain intensity values are set , to test the tipping bucket rain sensor, and construct an equivalent rain intensity function according to the test results. Step S2: Obtain the instant rainfall function according to the equivalent rain intensity function. The present invention overturns the existing method of obtaining rainfall data through the tipping bucket rain sensor, and achieves the effect of breaking the routine with higher precision and smaller error, without modifying the main components of the conventional tipping bucket rain sensor In the case of changes, the collection of the time interval between two flips of the tipping bucket is introduced, combined with the characteristic attributes of the tipping bucket rain sensor, a new solution for obtaining accurate rainfall is constructed.
Owner:福州小草科技有限公司
A Frequency-Domain Direction Finding Method for Passive Radar Fixed Targets Based on External Radiation Sources
InactiveCN105137388BReduce computationImprove robustnessRadio wave finder detailsRadio wave direction/deviation determination systemsPassive radarFindings methods
Owner:ZHOUKOU NORMAL UNIV
An installation method of steel-plastic composite pipeline for oil field gathering and transportation
InactiveCN104864176BImprove bindingNo weak spotsPipe laying and repairBranching pipesEngineeringHigh pressure
The invention provides a mounting method of a steel-plastic composite pipeline for gathering and transportation in an oil field. Segmental plastic pipes in fusion welding connection are subjected to diameter shrinkage processing and then are nested and connected with steel pipes. According to the mounting method, the whole pipeline does not have seams or weak parts, the lining plastic pipelines are firmly combined with the steel pipes, the strength function, the corrosion-resistant function and the non-leakage sealing function of steel-plastic composite pipes can be fully performed during gathering and transporting of fluids, the high-temperature, high-pressure and high-corrosion fluids can be conveyed for a long distance safely and reliably, maintenance of the steel-plastic composite pipeline for gathering and transportation can be reduced, the gathering and transportation efficiency is improved, and the service life of the pipeline is remarkably prolonged.
Owner:CHANGCHUN UNIV OF TECH
Method for Calculating Depth of Sprayed Water of Translational Sprinkler in Different Working Conditions
ActiveUS20190269077A1Low costReasonable sprinkling irrigationData processing applicationsWatering devicesEngineeringUltimate tensile strength
Disclosed is a method for calculating the depth of sprayed water of a translational sprinkler in different working conditions, involving placing rain barrels (3) in n rows in the movement direction of a translational sprinkler (1), each row having m barrels, such that the spray radius of rain droplets can completely cover the rain barrels (3) while ensuring that the translational sprinkler (1) is spraying stably; calculating the average sprinkler strength of each rain barrel (3); drawing a relationship curve of the sprinkler strength and the distance from the centre; setting the movement speed s of the translational sprinkler (1); establishing a function relationship between a sprinkler strength d′ and time t; calculating the time t2 needed for the translational sprinkler (1) to completely pass one of the rain barrels (3); and with the condition that the movement time is t2, performing mathematical integration on the sprinkler strength function to obtain the sprinkled depth of water at a certain rain barrel (3). The calculation method has a simple operation, is fast and can effectively save on costs, providing a basis for optimizing the movement speed of the translational sprinkler (1).
Owner:JIANGSU UNIV
Application of mud-resistant slump-retaining type water reducer to machine-made sand concrete prefabricated component
The invention discloses application of a mud-resistant slump-retaining type water reducer to a machine-made sand concrete prefabricated component and discloses the machine-made sand concrete prefabricated component comprising the mud-resistant slump-retaining type water reducer. The mud-resistant slump-retaining type water reducer developed by the invention is of a clustered molecular structure and contains a large number of amine cations with early-strength functions, thereby having multiple functions of mud resistance, slump retaining, early strength and the like and the mud-resistant slump-retaining type water reducer is applied to the machine-made sand concrete prefabricated component, thereby being capable of effectively improving the early-stage strength of the concrete while retaining slump of the concrete, avoiding steam curing and curing under natural conditions to achieve the mould stripping strength within 9 to 12 hours, and not adding any mineral reinforced materials and glass fibers to greatly reduce the production cost and the mould turnover cycle. Furthermore, the mud-resistant slump-retaining type water reducer in the machine-made sand concrete prefabricated component is a key technology node for achieving prefabricated assembly construction, fills up the domestic blank and has greater economic and social significance.
Owner:GUANGDONG REDWALL NEW MATERIALS +1
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