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Compound inhibitor for exploitation of oil-gas field and preparation method thereof
ActiveCN101230260AGood corrosion inhibitionPrevents foulingBorehole/well accessoriesPhosphateThiourea
The invention discloses an oil gas field exploitation used compound inhibitor and the preparation method. The compound inhibitor contains imidazolinyl organic phosphate, 2 - N-acid butyrate -1, 2, 4-tricarboxylic acid, thiourea, cetylpyridinium chloride. The mixture proportions of all constituents by weight can meet the specified contents of all active substances. The preparation method is that the 2 - N-acid butyrate -1, 2, 4 - tricarboxylic acid is added into imidazolinyl organic phosphate; thiourea is added into and dissolved into water; the solutions obtained by sub-steps are mixed together and are added into the cetylpyridinium chloride; after evenly stirring for 50-90 minutes and keeping the temperature rang within 15-45 DEG C, the inhibitor of the invention is produced. The compound inhibitor uses multifold medicaments for synergia, can prevent scale formation, can kill bacteria or inhabit bacteria from growing with less usage, can be applied to wide range, and can perform excellent efficiency under complex water quality condition.
Owner:XINJIANG DELAND
Self-organizing neural network-based unmanned aerial vehicle mission planning method
ActiveCN108170147ASignificant innovationSimple structureNeural architecturesPosition/course control in two dimensionsPlanning approachReal-time computing
The invention provides a self-organizing neural network-based unmanned aerial vehicle mission planning method. The method includes a self-organizing neural network initialization step, a winning nodeselection step, a winning node winning neighborhood calculating step, a network parameter updating step and a dynamic response step. According to the method, the structure of a self-organizing neuralnetwork and the weights of nodes are initialized; the weights are normalized; an input vector is received; a node is selected as a winning node, the inner product of the selected node and the input vector being the largest; all nodes in the winning neighborhood of the winning node are calculated; the weights of the nodes are updated differently according to distances from the nodes to the winningnode; and when an emergency situation occurs, the parameters of the network are dynamically adjusted, so that timely response can be made. The weights of the nodes in the winning neighborhood are updated; a multi-constraint condition is introduced during the execution process of the algorithm; a chaotic mechanism is introduced to solve the problem of detouring of unmanned aerial vehicles at a plurality of task points; and a dynamic response mechanism is adopted, so that the adaptability of an unmanned aerial vehicle group in a dynamic environment can be improved, and therefore, more effectiveunmanned aerial vehicle mission planning can be realized.
Owner:NANJING UNIV OF POSTS & TELECOMM
A marine observation big data visualization analysis method based on a complex network
ActiveCN109947879AGuaranteed dynamic performanceRealize the maximum application valueGeographical information databasesICT adaptationGaussian network modelModel parameters
Owner:OCEAN UNIV OF CHINA
Cement-based material for adsorbing and solidifying chloride ions and preparation method thereof
ActiveCN109133802AGood mechanical propertiesGood ability to absorb and solidify chloride ionsSlagDissolution
The invention relates to a cement-based material for adsorbing and solidifying chloride ions and a preparation method thereof and belongs to the field of durability of cement-based materials. The cement-based material comprises the following raw materials in part by weight: 90-560 parts of Portland cement, 10-30 parts of dispersing agent, 2-6 parts of graphdiyne nano-material, 30-280 parts of phosphorus slag powder, 20-250 parts of quicklime and 70-375 parts of mixing water. The preparation method comprises the following steps: modifying the phosphorus slag powder by adopting the quicklime andplacing the dispersing agent and the graphdiyne nano-material in the mixing water for dissolution to prepare a dispersed suspension; adding the graphdiyne suspension in the Portland cement doped withthe phosphorus slag powder to stir and performing vibratory compaction molding on a stirred graphdiyne cement slurry pouring mold; de-molding after standard curing of a sample to a specified time. The cement-based material has good abilities to adsorb and solidify the chloride ions and can significantly improve the durability of reinforced concrete; meanwhile, the pressure of natural resources iseffectively relieved by efficient utilization of the phosphorus slag powder, so that the purposes of energy saving and emission reduction, building material recycling and green industrialization areachieved.
Owner:DALIAN UNIV OF TECH
Synthetical leakage-selection module for longitudinal and horizontal timing sequence identification of industrial and mining low-voltage electric network
InactiveCN101645594AEnsure safetyReduce the scope of the searchEmergency protective arrangements for automatic disconnectionElectricityLow voltage
The invention provides a synthetical leakage selection module for the longitudinal and horizontal timing sequence identification of an industrial and mining low-voltage electric network on the basis of three invention patent achievements, i.e. ZL02110276.7, ZL200510042067.2 and ZL200510044820.1, aiming at the special situation and the actual demand of an electricity leakage protection system of the industrial and mining low-voltage electric network. The synthetical leakage-selection module can not only ensure the leakage selection of a feeder to be quick and accurate, but also distinguish three-phase symmetrical electricity leakage and single-phase electricity leakage, and can also separately display the single-phase electricity leakage of a bus and final check back-up protection no matterwhether the low-voltage electric network has zero sequence reactor compensation or not and whether a zero sequence reactor is in an undercompensation state or an overcompensation state or not.
Owner:傅桂兴
End effector for fruit and vegetable picking robot
The invention relates to an end effector for a fruit and vegetable picking robot. The end effector comprises a grabbing system, a cutting system, a sensing system, a shell and the like; the grabbing system grabs fruits into an inner cavity of the effector by utilizing five rubber rollers rotating at a high speed through high-speed rotation and huge friction force to realize a fruit grabbing action; the cutting system is that a lead screw drives a diamond-shaped frame to perform forward and backward telescopic movement, an electromagnetic mechanism and a saw blade are pushed to perform forward and backward telescopic movement, and a serrated blade is repeatedly driven at a high speed by using the electromagnetic mechanism to cut a branch; the sensing system consists of a pressure sensor, a miniature vision sensor and the like and plays roles in action connection and process control in the processes of the grabbing the fruits and cutting fruit stalks. The end effector provided by the invention has the benefits that with the adoption of novel grabbing, driving and cutting methods, simplicity and reliability are realized, the picking speed of an intelligent picking robot is greatly improved, and the control difficulty and the cost are low. The end effector can meet the demands of a ball-shaped picking robot and is beneficial to the improvement of the picking speed of the fruit picking robot and the practical use and the commercialization of the robot.
Owner:NANCHANG UNIV
Quick screening detection method for PPCPs pollutants in household drinking water
InactiveCN108896670AQuick screeningQuick checkComponent separationWater qualityEnvironmental chemistry
The invention relates to the field of analytical chemistry and food safety, in particular to a detection method of drinking water. A quick screening detection method for PPCPs pollutants in householddrinking water establishes a database of 112 PPCPs based on retention time and precise molecular weights of parent ions and daughter ions for confirming and screening target analytes and achieves accurate quantification based on a primary patent ion extraction peak area. The method comprises the following steps: preparing a standard liquid of 112 PPCPs compounds; extracting a sample; purifying thesample; carrying out chromatographic analysis; carrying out mass spectrometry analysis; establishing a screening database; and processing data. The method is quick, accurate, high in sensitivity andwide in screening range, provides a powerful technical means for monitoring risks of water quality, and can provide an effective guarantee for food safety supervision.
Owner:陈溪
Application of ginsenoside CK in preparation of external drugs to treat atopic dermatitis
InactiveCN109908161ARegulatory immunitySignificant innovationCosmetic preparationsOrganic active ingredientsHigh concentrationCuticle
The invention relates to the technical field of medical treatment, in particular to application of ginsenoside CK in the preparation of external drugs and health cosmetics to treat atopic dermatitis.OVA-sensitized (ovalbumin-sensitized) atopic dermatitis mouse models are established; filaggrin gene-deficient atopic dermatitis mice are selected; the two types of mice are fed with ginsenoside CK with different concentrations. The results show that ginsenoside CK can evidently reduce the scratching frequency of the OVA- sensitized AD (atopic dermatitis) model mice and reduce epidermal and dermalthickness of the mice; the therapeutic effect of a medium concentration group and that of the high concentration group are evidently higher than that of the low concentration group and that of a dexamethasone cream group; ginsenoside CK can reduce dermatitis score and scratching frequency of Ft mice and the expression of IL-4 at skin lesions of the Ft mice, the therapeutic effect of the medium concentration group is higher than that of the low concentration group and that of the high concentration group, and dexamethasone cream cannot improve atopic dermatitis type skin lesions with skin barrier dysfunction caused by filaggrin gene deficiency. The external drugs and health cosmetics made with ginsenoside CK herein have the advantages of good therapeutic effect and good safety.
Owner:SHUGUANG HOSPITAL AFFILIATED WITH SHANGHAI UNIV OF T C M
Material for solidifying heavy metal in incineration fly ash of municipal solid waste and preparation method of material
ActiveCN108129099AInexpensive curing processHigh compressive strengthSolid waste managementEnvironmental resistanceMechanical property
The invention belongs to the field of solid-waste environmental protection ecological materials and provides a material for solidifying a heavy metal in the incineration fly ash of a municipal solid waste and a preparation method of the material. The material is a graphdiyne based novel cement-based material and comprises the following raw materials: 200-800 parts of Portland cement, 200-800 partsof fly ash, 10-25 parts of a dispersing agent, 2-5 parts of graphdiyne, and 250-350 parts of mixing water. The material not only has an excellent mechanical property, but also effectively solidifiesthe harmful heavy metal in the incineration fly ash of the municipal solid waste, obviously reduces the permeability of the heavy metal ion in the fly ash, is stable and efficient, and is favorable for realizing the reutilization of the resource of the incineration fly ash; in addition, the material is doped with no chemical stabilizer, the used materials are non-toxic and harmless as well as green and environmentally friendly, the operation process is simple and convenient, and huge solidifying cost is reduced.
Owner:DALIAN UNIV OF TECH
A recursive causal inference method based on causal segmentation
InactiveCN109542936AImprove accuracyHigh speedDigital data information retrievalSpecial data processing applicationsData dredgingThe Internet
The invention belongs to the technical field of data mining, in particular to a recursive causal inference method based on causal segmentation. The method of the invention adopts the divide-and-conquer strategy, recursively utilizes the low-order conditional independence test to divide the data set into layers of causality, then reconstructs the causality of each sub-data set, and finally merges to obtain the whole causality information of the data set. This method can be used in high-dimensional data set for causal inference and causal relationship mining. Under the background of big data era, causality inference algorithm has been widely used in the fields of economics, Internet social network, medical big data and so on, but high-dimensional data problem is a common problem in the industry information intelligence, so it is urgent to solve the related problems in this field. The present invention is helpful to solve the problem of how to deal with the ever-increasing mass data causal information mining, and plays an important role in extracting the precious causal information in the mass data.
Owner:FUDAN UNIV
Red mud/Yellow River sediment-based geopolymer flood prevention stone and preparation method thereof
The invention belongs to the field of comprehensive utilization of solid waste resources, and provides a red mud / Yellow River sediment-based geopolymer flood prevention stone and a preparation methodthereof. The red mud / Yellow River sediment-based geopolymer flood prevention stone comprises the following raw materials: 100-400 parts of red mud, 100-400 parts of Yellow River sediment, 30-100 partsof mineral powder, 15-25 parts of excitant and 25-80 parts of mixing water. The preparation method comprises the following steps of: firstly, adding water glass as an excitant into mixing water, andcarrying out ultrasonic stirring treatment to prepare a uniformly dispersed water glass aqueous solution; secondly, adding the mixture of the red mud, the Yellow River sediment and the mineral powderinto the water glass aqueous solution, performing stirring, and carrying out compression molding on the stirred red mud / Yellow River sediment slurry by virtue of a pouring mold; and finally, maintaining the sample in an air environment, and removing the mold. The red mud / Yellow River sediment-based geopolymer flood prevention stone prepared by the invention has the lower production cost, has the better strength, is beneficial to promoting the comprehensive utilization of solid waste resources such as red mud, Yellow River sediment and the like, and has remarkable environmental protection, economic and engineering application values.
Owner:DALIAN UNIV OF TECH
Collagen polypeptide nanosphere surface positive charge modification method
InactiveCN105233769AHigh active functional group contentImprove performanceConnective tissue peptidesOther chemical processesFreeze-dryingNitrogen gas
The invention discloses a collagen polypeptide nanosphere surface positive charge modification method. The method includes: dispersing collagen polypeptide nanospheres in distilled water, adding Al2(SO4)3 under stirring, carrying out stirring reaction, then regulating the pH value of the system to 3.5-5.0, further carrying out stirring reaction, and performing centrifugation and separation to obtain Al<3+> modified collagen polypeptide nanosphere; dispersing the Al<3+> modified collagen polypeptide nanosphere in distilled water, adding a strong positive charge material under stirring, adjusting the pH value of the system to 4-7, introducing nitrogen for protection, adding an initiator, carrying out stirring reaction, centrifugation, separation, and freezing drying, thus obtaining the positive charge surface modified collagen polypeptide nanosphere. According to the aluminum tanning principle in a tanning chemical process, cations with good binding capacity with fluorine ions are introduced through reaction of Al<3+> and collagen polypeptide nanospheres, also the strong electropositive compound is further introduced through Michael addition reaction, and the excellent performance of nanoparticles is combined so as to effectively adsorb and separate fluorinions in wastewater.
Owner:SOUTHWEAT UNIV OF SCI & TECH
Conductive concrete material and preparation method thereof
The invention belongs to the field of functional materials and provides a conductive concrete material and a preparation method thereof. The material is a novel concrete material based on a graphdiynenanomaterial and comprises the following raw materials: 200-800 parts of Portland cement, 500-1600 parts of standard sand, 10-25 parts of a dispersing agent, 3-8 parts of the graphdiyne nanomaterialand 250-350 parts of mixing water. The method comprises the following steps: firstly, polyoxyethylene nonylphenylether as the dispersing agent and the graphdiyne nanomaterial are dissolved in the mixing water, ultrasonic processing is performed, and a waterborne dispersed suspension which is uniformly dispersed is prepared; secondly, the waterborne dispersed suspension is added to the Portland cement for stirring, stirred graphdiyne cement paste is poured into a mold and is vibrated and compacted to be molded; finally, a sample is subjected to standard curing, and demolding is performed. The prepared concrete material has excellent conductivity and higher strength, electrical resistivity of the concrete material is reduced obviously, and practical engineering application of novel conductive concrete is facilitated.
Owner:DALIAN UNIV OF TECH
Method for preparing ZnO nano fence
ActiveCN104505343AControl growth positionAchieve growthSemiconductor/solid-state device manufacturingNanotechnologyNanoparticleClosed loop
The invention discloses a method for preparing a ZnO nano fence. The method is characterized by comprising the following steps: (1) a GaN substrate is photoetched; (2) the substrate is coated with gold catalyst reaction solution; (3) the substrate is heated and the solution is contracted; (4) gold is reduced from the solution and is in closed-loop distribution; and (5) a ZnO nanowire fence is grown in a catalyst-induced way by a CVD method. Gold nanoparticle distribution is controlled according to the hydrophobicity-hydrophilicity of the surface of the substrate after photoetching so as to inductively grow a nanowire fence. Unlike traditional control methods, the method of the invention has obvious innovative significance and a wider range of applications.
Owner:CHONGQING INST OF GREEN & INTELLIGENT TECH CHINESE ACADEMY OF SCI
Hydrofining process for catalytically cracked crude gasoline
ActiveCN112410069AQuality assuranceQuality improvementTreatment with hydrotreatment processesHydrocarbon oils treatment productsSteam pressureGasoline
The invention discloses a hydrofining process for catalytic cracking crude gasoline, which is improved on the basis of the original catalytic cracking and catalytic stabilization gasoline hydrofiningprocess flow as follows: catalytic crude gasoline is directly fed into a gasoline hydrofining device instead of being fed into an absorption tower, and other processes are not changed. Therefore, a catalytic absorption stabilizing system only processes rich gas and does not process crude gasoline, so that the load and the energy consumption are greatly reduced; the hydrogenation operation is not influenced by a component which is not more than C4 and is brought into hydrogenation along with crude gasoline, the component is pulled out from a stripping tower along with acidic components such asH2S and NH3, the components are returned to the catalytic refinery along with the original process, and the steam pressure of the gasoline is stabilized by the product, so that the steam pressure of the gasoline is ensured; a small amount of gasoline which is absorbed and stabilized is brought in along with rich gas to be continuously distilled from the bottom of a stabilizing tower, and is mixedwith crude gasoline for hydrogenation after heat exchange, so that the material balance of the combined device is not changed.
Owner:广东碳寻科技有限公司
Broadband phased array radar anti-decoy interference method based on fractional domain-frequency domain processing
ActiveCN113238194ASolve the problem of anti-spoofing interferenceImprove computing efficiencyWave based measurement systemsComplex mathematical operationsRadar antennasTime domain
The invention belongs to the field of radar anti-interference, and discloses a broadband phased array radar anti-decoy interference method based on fractional domain-frequency domain processing. The method comprises the following steps: acquiring a plurality of echo signals and target position information of a phased array radar antenna array; all echo signals are converted to a fractional domain, and an interference and noise covariance matrix and a signal and noise covariance matrix of the fractional domain are obtained according to the fractional domain covariance matrix; performing convex optimization to obtain a fractional domain steering vector of the target echo signal, obtaining a beam forming weight vector according to the fractional domain steering vector of the target echo signal, and generating a beam forming signal; performing low-pass filtering on the beam forming signal of the fractional domain in the fractional domain by using a low-pass filter with the cut-off frequency of fmu to obtain a fractional domain target echo signal; and carrying out fractional domain inverse FrFT processing to obtain a time domain target echo signal. Robust narrow-band beam forming and fractional domain-frequency domain low-pass filtering are applied in the fractional domain to realize effective suppression of broadband decoy LFM interference signals.
Owner:中国人民解放军火箭军工程大学
Cryopreservation method of cranoglanis bouderius seminal fluid and diluent thereof
ActiveCN107047540AGuaranteed persistencePrevent degradationDead animal preservationWater bathsPhosphate
The invention discloses a preserved diluent of cranoglanis bouderius seminal fluid and a cryopreservation method of the cranoglanis bouderius seminal fluid. The preserved diluent is prepared from sugar, sodium salt, potassium salt, calcium salt, tyrosine, glycine, distilled water and an anti-freezing agent-dimethyl sulfoxide. The cryopreservation method comprises the following steps: selecting good male parent fish meeting the conditions to carry out seminal fluid collection, preserving in the preserved diluent in which neomycin sulfate and streptomycin are added, adopting a cooling rate which is -10.5 DEG C / 30 seconds, and putting the seminal fluid in liquid nitrogen for cryopreservation after reaching -150 DEG C; when unfreezing and recovering are needed, taking out the cyropreserved cranoglanis bouderius seminal fluid, adding a PBS (Phosphate Buffer Solution) of which the volume percentage is 0.65 to 0.7 percent as an unfreezing solution, and putting the cranoglanis bouderius seminal fluid in a water bath of which the temperature is 32 to 40 DEG C for rapid unfreezing and recovering. According to the technology disclosed by the invention, the durability of preservation time of the cranoglanis bouderius seminal fluid can be ensured, the protection effect of the seminal fluid is good, and sperms after preservation are high in survival rate and good in vitality.
Owner:SOUTH CHINA AGRI UNIV +2
Red mud/Yellow River sediment artificial fish reef and preparation method thereof
ActiveCN112876148AHigh strengthReduce manufacturing costSolid waste managementCompression moldingSlurry
The invention discloses a red mud / Yellow River sediment artificial fish reef and a preparation method thereof, and belongs to the field of comprehensive utilization of solid waste resources. Raw materials comprise 100-400 parts of red mud, 100-400 parts of Yellow River silt, 30-100 parts of mineral powder, 50-200 parts of shells, 15-25 parts of an exciting agent and 25-80 parts of mixing water. The preparation method comprises the following steps: firstly, adding water glass as an exciting agent into mixing water to prepare a uniformly dispersed water glass aqueous solution; secondly, adding an aqueous solution into the red mud, the yellow river sediment, the mineral powder and the shell mixture for stirring, and carrying out compression molding on the stirred yellow river sediment slurry casting mold; and finally, maintaining the sample in an air environment, and removing the mold. Compared with a common cement concrete artificial fish reef, the preparation and production cost of the artificial fish reef is effectively reduced, meanwhile, the artificial fish reef has good strength and durability, and the alkalinity of the system is low. Comprehensive utilization of solid waste resources is promoted, the production cost of the artificial fish reef is reduced, other properties such as durability of the artificial fish reef are improved, and the artificial fish reef has remarkable environment-friendly, economic and engineering utilization values.
Owner:DALIAN UNIV OF TECH
Catalytic cracking unit-hydrogenation unit combined energy-saving technological process
ActiveCN111187641AReduce processingReduce cooling loadTreatment with hydrotreatment processesHydrocarbon oils treatment productsGasolineProcess engineering
The invention belongs to the technical field of petrochemical engineering, and discloses a catalytic cracking unit-hydrogenation unit combined energy-saving technological process. The technological process has the following improvements on the basis of a conventional catalytic cracking device and a conventional technological process: rich diesel oil at the bottom of a re-absorption tower is directly fed into a diesel oil catalytic hydrocracking device instead of being fed into a main fractionating tower for recycling in the prior art, a conventional poor diesel oil-rich diesel oil heat exchanger is cancelled, and other pipeline flows are not changed. According to the technological process, a rich diesel oil refining process of the catalytic cracking device is omitted; even if the rich diesel oil which is not subjected to refining treatment contains a certain amount of gasoline and LPG components, material balance of a combined device is not affected; and the rich diesel oil from the bottom of the catalytic reabsorption tower is directly subjected to hydrocracking, so the catalysis procedure for the rich diesel oil can be omitted, the processing load of the main fractionating toweris reduced, downstream hydrogenation is not influenced basically, and the method has remarkable innovative significance.
Owner:SOUTH CHINA UNIV OF TECH
NiFe-LDH cement-based composite wave-absorbing material and preparation method thereof
InactiveCN112745084AImprove structural strengthImprove electromagnetic wave absorption performanceSlurryMultiple frequency
The invention belongs to the field of environmental protection, and provides a NiFe-LDH cement-based composite wave-absorbing material and a preparation method thereof. The raw materials comprise: 300-400 parts of cement; 3-4 parts of NiFe-LDH; 3-4 parts of a water reducing agent; and 100-140 parts of mixing water. The preparation method comprises the following steps: firstly, adding the water reducing agent into the mixing water, and stirring for 3 minutes to form a uniform mixing solution; secondly, adding nickel-iron layered double hydroxides (NiFe-LDH) into the mixed solution, placing the mixed solution in an ultrasonic environment for ultrasonic treatment, and obtaining a mixed aqueous solution in which NiFe-LDH is evenly dispersed; then, putting accurately weighed cement into a stirring pot, then adding the stirring solution, stirring the mixture to be uniform, and pouring the prepared slurry into a mold; and finally, maintaining the sample in an air environment, and removing the mold. The prepared NiFe-LDH cement-based composite wave-absorbing material is low in electromagnetic wave reflectivity, the frequency width with the reflectivity lower than -10 dB is wide, and the NiFe-LDH cement-based composite wave-absorbing material is suitable for electromagnetic wave pollution absorption of multiple frequency bands and has remarkable environmental protection and engineering application value.
Owner:DALIAN UNIV OF TECH
Traditional Chinese medicine composition for treating waist and neck pain
The invention discloses a traditional Chinese medicine composition for treating waist and neck pain. The composition comprises 5-10 parts by weight of notopterygium root, 10 to 15 parts by weight of radix puerariae; 2-9 parts by weight of turmeric; 6 to 15 parts by weight of radix angelicae pubescentis; 10 to 15 parts by weight of herba taxilli; 8-15 parts by weight of achyranthes bidentata. 8-15parts by weight of eucommia ulmoides, 7-16 parts by weight of radix dipsaci, 7-15 parts by weight of rhizoma cibotii, 8-12 parts by weight of flos carthami, 8-12 parts by weight of frankincense, 10-25parts by weight of zaocys dhumnade, 8-20 parts by weight of radix gentianae macrophyllae, 8-15 parts by weight of corydalis tuber, 10-20 parts by weight of betel nut, 10-15 parts by weight of pawpawand 12-20 parts by weight of coix seed. The waist pain can be effectively treated by the composition.
Owner:张黎明
Anti-decoy jamming method for wideband phased array radar based on fractional domain-frequency domain processing
ActiveCN113238194BSolve the problem of anti-spoofing interferenceImprove computing efficiencyWave based measurement systemsComplex mathematical operationsAnti jammingAlgorithm
The invention belongs to the field of radar anti-jamming, and discloses a broadband phased array radar anti-decoy jamming method based on fractional domain-frequency domain processing, comprising: obtaining multiple echo signals and target position information of a phased array radar antenna array; Convert all echo signals to the fractional domain, and obtain the interference-plus-noise covariance matrix and the signal-plus-noise covariance matrix of the fractional domain according to the fractional domain covariance matrix; perform convex optimization to obtain the fractional domain steering vector of the target echo signal, according to The fractional domain steering vector of the target echo signal is used to obtain the beamforming weight vector and generate the beamforming signal; the cutoff frequency is f mu The low-pass filter in the fractional domain performs low-pass filtering on the beamforming signal in the fractional domain to obtain the target echo signal in the fractional domain; and performs the inverse FrFT processing in the fractional domain to obtain the target echo signal in the time domain. The invention uses robust narrowband beamforming and fractional-frequency domain low-pass filtering in the fractional domain to effectively suppress broadband decoy LFM interference signals.
Owner:ROCKET FORCE UNIV OF ENG
Wear-resistant and corrosion-resistant ternary boride/stainless steel composite material and manufacturing method thereof
The invention discloses a wear-resistant and corrosion-resistant ternary boride / stainless steel composite material and a manufacturing method, and belongs to the technical field of composite material manufacturing. The wear-resistant and corrosion-resistant ternary boride / stainless steel composite material comprises stainless steel material powder, ternary boride raw material alloy powder and a small amount of forming agent; and the ternary boride raw material alloy powder is manufactured from, by mass, 5wt%-20wt% of ferroboron alloy powder, 5wt%-20wt% of chromium powder, 10wt%-30wt% of molybdenum powder, 10wt%-15wt% of nickel powder, 1wt%-5wt% of copper powder, 1wt%-5wt% of transition metal carbide, 0.5wt%-3wt% of rare earth oxide and the balance of iron powder. According to the wear-resistant and corrosion-resistant ternary boride / stainless steel composite material, the thickness of a ternary boride alloy layer and a stainless steel matrix alloy can be flexibly adjusted; the bonding property after sintering is good; the ternary boride alloy layer has corrosion resistance equivalent to that of the stainless steel matrix; the hardness is high and adjustable; the wear resistance is good; the selectable range of the stainless steel matrix is wide; the manufacturing cost is low; and the operation is simple.
Owner:WUHAN UNIV OF SCI & TECH
Concrete material with electromagnetic wave absorption performance and preparation method thereof
Owner:DALIAN UNIV OF TECH
A catalytic cracking naphtha hydrotreating process
ActiveCN112410069BEasy to handleReduce energy consumptionTreatment with hydrotreatment processesHydrocarbon oils treatment productsGasolineProcess engineering
The invention discloses a hydrogenation refining process of catalytic cracking naphtha, which makes the following improvements on the original catalytic cracking and catalytic stable gasoline hydrofining technological process: the catalytic naphtha is directly fed into the gasoline instead of the original absorption tower. Hydrogen refining unit, other processes remain unchanged. In this way, the catalytic absorption stabilization system only processes rich gas and does not process naphtha, and the load and energy consumption will be greatly reduced; ≤C 4 The components do not affect the hydrogenation operation and will vary with H 2 S, NH 3 The acidic components are pulled out from the stripping tower together, and the original process is returned to catalytic refining, so that the vapor pressure of the product is guaranteed to be stable; a small amount of gasoline that is brought into the stable absorption by the rich gas continues to distill from the bottom of the stabilizing tower, and the heat exchange Afterwards, the original process is mixed with crude gasoline for hydrogenation, so the material balance of the combined device will not be changed.
Owner:广东碳寻科技有限公司
Intelligent faucet
InactiveCN106286934APracticalSignificant innovationOperating means/releasing devices for valvesBiomedical engineeringMagnet
The invention discloses an intelligent faucet. The intelligent faucet is provided with a body (1) and a sensor (2). A support face (3) is arranged in the body (1). The intelligent faucet is characterized in that the sensor (2) is provided with a magnet (4) located on the back face of the sensor (2); and the support face (3) is provided with an iron piece (5) located in the position, close to the support face (3), of the magnet (4). The intelligent faucet is high in practicability and significant in technological innovation and provides great effects for improving labor production efficiency and facilitating product maintenance.
Owner:温州得享家居科技有限公司
Medium-long rib prefabricated bottom plate hoisting structure and construction method thereof
PendingCN113802866AInnovation of lifting structureFix damageConstruction materialFloorsLap jointMechanical engineering
The invention discloses a medium-long rib prefabricated bottom plate hoisting structure and a construction method thereof. The medium-long rib prefabricated bottom plate hoisting structure comprises structural beams, wherein the structural beams are arranged side by side, a medium-long rib prefabricated bottom plate is in lap joint with the upper parts of the structural beams, detachable angle steel is arranged at the upper edges of the end faces, which face each other, of the structural beams, the end faces of one side of the detachable angle steel are attached to the end faces of the structural beams, the end faces of the other sides of the detachable angle steel are attached to the lower end face of the medium-long rib prefabricated bottom plate, the detachable angle steel is provided with a jacking structure which is used for tightly attaching the detachable angle steel to the medium-long rib prefabricated bottom plate, and a hoisting structure is arranged on the upper end face of the medium-long rib prefabricated bottom plate. Steel pipes with semicircular holes are additionally arranged in the short edge direction of the prefabricated bottom plate, so that the height of materials in the short edge direction of the prefabricated bottom plate is increased, the bending resistance is improved, the problem of damage caused by hoisting in the short edge direction of the prefabricated bottom plate is effectively solved, and additionally, the width of the produced prefabricated bottom plate is large.
Owner:SHENYANG JIANZHU UNIVERSITY
Compound inhibitor for exploitation of oil-gas field and preparation method thereof
ActiveCN101230260BPrevents foulingEnhanced inhibitory effectBorehole/well accessoriesPhosphoric Acid EstersButyrate
Owner:XINJIANG DELAND
A material for solidifying heavy metals in municipal solid waste incineration fly ash and its preparation method
ActiveCN108129099BUniform mechanical stirringHigh compressive strengthSolid waste managementPortland cementGraphite
The invention belongs to the field of solid-waste environmental protection ecological materials and provides a material for solidifying a heavy metal in the incineration fly ash of a municipal solid waste and a preparation method of the material. The material is a graphdiyne based novel cement-based material and comprises the following raw materials: 200-800 parts of Portland cement, 200-800 partsof fly ash, 10-25 parts of a dispersing agent, 2-5 parts of graphdiyne, and 250-350 parts of mixing water. The material not only has an excellent mechanical property, but also effectively solidifiesthe harmful heavy metal in the incineration fly ash of the municipal solid waste, obviously reduces the permeability of the heavy metal ion in the fly ash, is stable and efficient, and is favorable for realizing the reutilization of the resource of the incineration fly ash; in addition, the material is doped with no chemical stabilizer, the used materials are non-toxic and harmless as well as green and environmentally friendly, the operation process is simple and convenient, and huge solidifying cost is reduced.
Owner:DALIAN UNIV OF TECH
The end effector of the fruit and vegetable picking robot
The invention relates to an end effector for a fruit and vegetable picking robot. The end effector comprises a grabbing system, a cutting system, a sensing system, a shell and the like; the grabbing system grabs fruits into an inner cavity of the effector by utilizing five rubber rollers rotating at a high speed through high-speed rotation and huge friction force to realize a fruit grabbing action; the cutting system is that a lead screw drives a diamond-shaped frame to perform forward and backward telescopic movement, an electromagnetic mechanism and a saw blade are pushed to perform forward and backward telescopic movement, and a serrated blade is repeatedly driven at a high speed by using the electromagnetic mechanism to cut a branch; the sensing system consists of a pressure sensor, a miniature vision sensor and the like and plays roles in action connection and process control in the processes of the grabbing the fruits and cutting fruit stalks. The end effector provided by the invention has the benefits that with the adoption of novel grabbing, driving and cutting methods, simplicity and reliability are realized, the picking speed of an intelligent picking robot is greatly improved, and the control difficulty and the cost are low. The end effector can meet the demands of a ball-shaped picking robot and is beneficial to the improvement of the picking speed of the fruit picking robot and the practical use and the commercialization of the robot.
Owner:NANCHANG UNIV
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