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Regulatable hydraulic machine with up and down both double moving
InactiveCN1559792AInnovative designSimple structureForging press drivesPress ramMarine engineeringMaster cylinder
An adjustable hydraulic press with movable upper and lower units is composed of vertical columns, upper transverse beam, primary slide block, the slide block for pressing edge, bench, floating bench, lower transverse beam, the primary and secondary cylinders fixed to upper transverse beam, and a push-up cylinder fixed to lower transverse beam for driving said floating bench.
Owner:JILIN UNIV
Method for detecting amoxicillin residual quantity in milk and meat product
InactiveCN102072892AAchieving High Sensitivity DetectionDirect measurement has low sensitivityColor/spectral properties measurementsFluorescence/phosphorescenceQuinoneUltraviolet
The invention discloses a method for detecting amoxicillin residual quantity in milk and meat products. The method includes the following steps: preparing amoxicillin standard aqueous solution; adding a nonionic surfactant; reacting the obtained solution with quinone or alizarin to get a charge transfer system; determining the wavelength scanning range of fluorescence or ultraviolet; further calculating the linear range, working curve and other parameters of the standard solution; processing the sample to be detected by corresponding charge transfer reaction; determining reaction parameters under ultraviolet or fluorescence; and calculating to obtain the amoxicillin residue quantity. The technology further enhances the value of fluorescence intensity or UV absorption by utilizing the sensitizing effect of non-ionic surfactants, thus meets the low-residue testing requirement; simultaneously improves the system stability significantly, makes up the disadvantage of poor detection stability of fluorescence in the earlier application, and is more feasible in the actual detection.
Owner:云南健牛环境监测有限公司
Sleeve dissipative element with shear key
InactiveCN101525911AImprove connection strengthStrength is favorableShock proofingCement mantleSeismic hazard
The invention discloses a sleeve dissipative element with a shear key. The dissipative element consists of an inner tube and an outer tube which are coaxially lapped; the shear key is arranged on internal tube wall of a lapped segment of the outer tube; a cavity is formed between the inner tube and the outer tube, and an expanding cement mantle is formed in the cavity. Friction force of contact surfaces between the expanding cement mantle and the tube is increased by chemical prestress of expanding cement grout; and snap-in force between the expanding cement mantle and the shear key can improve joint strength between the outer tube and the grout mantle and control a fracture surface on the contact surface between external wall of the inner tube and the grout mantle. The dissipative element can be taken as a common support to bear axial load in a normal service status, and the dissipative element consumes and absorbs seismic energy by relative slip of the inner tube and the outer tube under the action of seismic load. The dissipative element has the advantages of low requirement for machining accuracy, steel saving and low cost. Only the grouting sleeve dissipative element needs to be replaced if the grouting sleeve dissipative element is damaged and disabled in a seismic hazard, which is very convenient.
Owner:TONGJI UNIV
Method for detecting type and content of organic acids in cured tobacco root secretion
InactiveCN102590371AEasy to operateThe detection process is fastComponent separationOrganic acidRetention time
The invention discloses a method for detecting the type and the content of organic acids in cured tobacco root secretion. The method comprises the following steps of: selecting the wavelength; selecting the chromatographic condition; preparing a standard working solution; drawing a working curve; pretreating a sample and measuring the sample; and determining the nature by using different organic acid retention time and quantifying by using a peak area external reference method to obtain the type and the content of the organic acids in the cured tobacco root secretion. By the method, the gap of detection of the type and the content of the organic acids in the cured tobacco root secretion is filled. By the method, nine organic acids can be simultaneously detected and analyzed within 10 minutes; and the method has the advantages of simplicity in operation, high detection speed, high reproducibility and high accuracy degree. The common detection equipment is used without a special instrument, and the method can be independently completed by one person.
Owner:YUNNAN AGRICULTURAL UNIVERSITY +1
Dopamine content detection method
ActiveCN103980716ATake advantage of fluorescence enhancementHigh sensitivityFluorescence/phosphorescenceInductively coupled plasmaStructural unit
The invention discloses a metal nanoparticle composite ICP (inductively coupled plasma) material and application thereof in dopamine content detection. The metal nanoparticle composite ICP material is an infinite coordination polymer comprising an Ag nanoparticle-modified repeating structural unit shown as formula I. By use of highly-sensitive and highly-selective fluorescent recognition functions of the surface modified rough Ag nanoparticle infinite coordination polymer ICP material on dopamine, direct fluorescence detection of the dopamine content in rat brain dialysis fluid can be realized. The method has the advantages of high sensitivity, good selectivity, fast response, low cost, less sample demand, and the like, and more importantly, the method has the advantages of simple operation and high stability, and can be applied to the determination of dopamine basic values in living body.
Owner:INST OF CHEM CHINESE ACAD OF SCI
Hydraulic pressure expansion liner corrosion resistant alloy composite tube and manufacturing method thereof
InactiveCN103574220ASolve construction needsNo special requirementsCorrosion preventionPipe protection against corrosion/incrustationCorrosion resistant alloyLine tubing
The invention discloses a hydraulic pressure expansion liner corrosion resistant alloy composite tube which is composed of a corrosion resistant alloy inner tube and a mild steel outer tube. The corrosion resistant alloy inner tube and the mild steel outer tube are assembled and liquid pressure is applied on the interior thereof after the assembly to cause the outer surface of the corrosion resistant alloy inner tube and the inner surface of the mild steel outer tube to be tight connected. The wall thickness of the corrosion resistant alloy inner tube is 1-4mm, and the outer diameter of the corrosion resistant alloy inner tube is 70-600mm. The wall thickness of the mild steel outer tube is 6-15mm, and the outer diameter of the mild steel outer tube is 76-610 mm. The composite tube has the beneficial effects that by adopting the method disclosed by the invention, an oil and gas gathering and transporting pipeline can be built for a severe corrosion area, and the method has no special requirements on sites and technologies, so the generalization is convenient.
Owner:BAOJI PETROLEUM STEEL PIPE
Fluorescence detection method for activity of alkaline phosphatase
ActiveCN110501317AEasy to operateHigh sensitivityPreparing sample for investigationFluorescence/phosphorescencePhosphateNa k atpase activity
The invention relates to a fluorescence detection method for the activity of alkaline phosphatase, which is characterized in that sodium 4-hydroxyphenyl phosphate (4-HPP) is used as a substrate, molecules of the substrate are hydrolyzed into 1,4-benzenediol (HQ) under the catalysis of alkaline phosphatase in an aqueous solution, 1,4-benzenediol can react with subsequently added 3-(2-aminoethylamino)propyltrimethoxysilane (DAMO) to generate silicon nanoparticles (SiNPs) capable of emitting green fluorescence. The higher the activity of alkaline phosphatase in the system is, the more the generated fluorescent silicon nanoparticles are, and the higher the fluorescence intensity is. Quantitative analysis and detection of the activity of alkaline phosphatase are carried out according to the fluorescence intensity change of the detection solution. Compared with the prior art, the method has the advantages that required reagents and medicines are simple and easy to obtain, the operation is convenient, quick and accurate, and a sensitive and reliable method is provided for quantitative detection of the activity of alkaline phosphatase in a clinical sample. According to the fluorescence detection method, the detection limit is 0.1mU / mL, and the fluorescence detection method has the advantages of high sensitivity, high selectivity, wide linear range and the like.
Owner:CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
Method for measuring amount of residual penicillin in milk
InactiveCN101776591ASolve detection difficultiesEasy to degradePreparing sample for investigationColor/spectral properties measurementsPenicillaminePenicillin
The invention discloses a method for measuring the amount of residual penicillin in milk. Standard working anhydrous alcohol solution with penicillin sodium is prepared, the pH value is regulated by dilute HCl to 2 plus or minus 0.5 or 4 plus or minus 0.5, the standard working anhydrous alcohol solution is bathed in boiling water, so that degradation products, i.e. penicillamine and penicillenic acid, are obtained, then the two degradation products respectively react with benzoquinone substance, so that charge-transfer complexes are obtained, and the working curves of different charge-transfer complexes are calculated. During measurement, the absorbance of the charge-transfer complex of milk sample is calculated by the same way, and is substituted into the working curve of the charge-transfer complex to work out the amount of the residual penicillin in the milk. The invention takes the lead in directly using the ultraviolet or fluorescent spectrophotometry to measure the amount of the residual penicillin in the milk. The method has the advantages of quick measurement, wide measurement range, high sensitivity, high accuracy and good selectivity, an expensive antibiotic detection instrument does not need to be purchased, the operation method is simple, and the method can reduce the production cost and the operation risk for diary processing enterprises, and therefore having a good application prospect.
Owner:云南健牛环境监测有限公司
Detection method of belt-lactam antibiotics residues in milk
InactiveCN101706440AReduce dosageReduce harmMaterial analysis by observing effect on chemical indicatorLow speedChemical reaction
The invention provides a detection method of belt-lactam antibiotic residues in milk. The belt-lactam antibiotic residues in milk is detected by the following three steps of centrifugation, chemical reaction of the belt-lactam antibiotic and heavy metal and ultraviolet spectrophotometry; the sample amount and the dosage of various reagents are less in the detection process; the method has less harm on the environment and rapid speed, and the whole operation process can be finished within 30min; and the detection can be finished only in need of equipping a low-speed centrifugal machine and an ultraviolet spectrophotometer without purchasing expensive antibiotic detector.
Owner:KUNMING UNIV OF SCI & TECH
Device for making hydraulic model
The invention relates to a device for making a hydraulic model, and belongs to the technical field of hydraulic engineering. The device has an international patent classification (IPC) number of E02B 1 / 02, is suitable for making a hydraulic model with a steep side slope or a large terrain height difference, and consists of a beam, an elevation control system, a bracket and a river cross section form control line. When a hydraulic engineering physical model is made, a coordinate origin of a coordinate system is determined above a river cross section; the beam is taken as a horizontal baseline, and scales processed along the horizontal direction can control the starting distance of the river cross section; each elevation control rod in the elevation control system can move up and down, and left and right, and the model relative elevation of each elevation control point is accurately controlled through scales along the vertical direction; the river cross section form control line directly passes through small holes at the tip of the elevation control rods in turn to form a complete river cross section; and construction personnel can make the channel cross section accordingly and then make the whole physical model.
Owner:BEIHANG UNIV +1
Preparation method of animal model simulating human pelvic inflammatory disease (PID)
InactiveCN102698292AHigh success rate of preparationNo special technical requirementsIn-vivo testing preparationsIMMUNE SUPPRESSANTSPhysiology
Owner:唐和斌
Manufacturing method of hydraulic model
The invention relates to a manufacturing method of a hydraulic model, belonging to the technical field of hydraulic engineering. The IPC (International Patent Classification) of the hydraulic model is E02B 1 / 02. The manufacturing method is suitable for manufacturing the hydraulic model with a steep side slope or higher topographic height difference and adopts a special topographic manufacturing instrument comprising four parts, i.e. a cross beam, an elevation control system, a support frame and a riverway section morphologic line. When the hydraulic model is manufactured, the manufacturing method comprises the following steps of: firstly determining a coordinate origin of a coordinate system above a riverway section; controlling the starting point distance of the riverway section along a scale processed in a horizontal direction by taking the cross beam as a horizontal datum line; accurately controlling the relative model elevation of each elevation control point along a vertical scale in such a way that each elevation control rod of the elevation control system can move up and down or left and right; and enabling the riverway section morphologic line to directly sequentially penetrate through a small hole positioned on the top end of each elevation control rod so as to form a complete riverway section. Thus constructors can manufacture the riverway section so as to manufacture an integral entity model.
Owner:HOHAI UNIV +1
Dissipative element of grouting sleeve
The invention discloses a dissipative element of a grouting sleeve, comprising an inner tube and an outer tube which are arranged coaxially. The slit between the lap sections of the outer tube and the inner tube is provided with expanding cement slurry, and an expanding cement sheath is formed after the expanding cement slurry is cured. The pretension force of the expanding cement slurry enables the friction force of the contact surface between the expanding cement sheath and the sleeve body to be increased. At normal operating condition, the dissipative element can be used as ordinary support to bear axial loading; with the effect of earthquake loading, the dissipative element consumes and absorbs the earthquake energy by relative sliding of inner and outer tubes. The member has no too high requirement for machining precision, thereby saving steel material and having low cost. After the dissipative element is damaged and inactive in earthquake hazard, the dissipative element of a grouting sleeve is just needed to be replaced and the operation is very convenient.
Owner:TONGJI UNIV
Method for extracting high-purity caffeine from tea leaves
ActiveCN105399741AReduce energy consumptionHigh selectivityOrganic chemistryBiotechnologyPhenolic content in tea
The invention relates to a method for extracting high-purity caffeine from tea leaves and belongs to the technical field of extraction. By-product caffeine crude products obtained during production of tea polyphenols are utilized, caffeine is crystallized in water, the method is safe and free of toxicity, cost is reduced, and both the value and the income are increased. The method is easy to operate and environmentally friendly, the energy consumption of the film separation technology is low, selectivity is high, and a device is flexible; a column chromatography method is simple in operation technology, high in efficiency and good in safety; due to the method that the film separation technology is combined with column chromatography, tea polysaccharide, tea polyphenols, theanine and other components are effectively separated, and subsequent crystallization and purification of caffeine are facilitated; re-crystallization is performed through water, and the method is safe, free of toxicity, environmentally friendly, high in yield and low in cost; the method has the advantages that energy consumption is low in the freezing and crystallizing process, no solvents residuals exist, and product purity is high, the method is simple, both the value and the income are increased, and the method has wide application prospects.
Owner:YUNNAN CHANONG BIOLOGICAL IND
Reinforced grouting sleeve dissipative element
The invention discloses a reinforced grouting sleeve dissipative element. The dissipative element consists of an inner tube and an outer tube which are coaxially lapped; a cavity is formed between the inner tube and the outer tube, a cement mantle is formed in the cavity, and stirrups are arranged in a grouting cavity. Friction force of contact surface between the expanding cement mantle and the tube is increased by chemical prestress of expanding cement grout; the stirrups can restrain expansion of cracks and prevent the expanding cement grout from cracking so as to improve bearing capacity and hysteretic energy dissipation properties of the dissipative element. The dissipative element can be taken as a common support to bear axial load in a normal service status, and the dissipative element consumes and absorbs seismic energy by relative slip of the inner tube and the outer tube under the action of seismic load. The dissipative element has the advantages of low requirement for machining accuracy, steel saving and low cost. Only the grouting sleeve dissipative element needs to be replaced if the grouting sleeve dissipative element is damaged and disabled in a seismic hazard, which is very convenient.
Owner:TONGJI UNIV
Boiling water enzyme deactivating method of fresh tea leaf
InactiveCN105285179AImprove product qualityGuarantee product qualityPre-extraction tea treatmentTea leafBotany
The invention relates to a boiling water enzyme deactivating method of fresh tea leaf, and belongs to the technical field of tea processing. The method comprises three steps: fresh tea leaf picking and transportation, boiling water enzyme deactivation, and spray cooling. Specifically the method comprises the following steps: picking fresh tea leaves, delivering the picked fresh tea leaves to a boiling and blanching machine by a material delivering machine; adding water into the boiling and blanching machine according to a ratio of fresh tea leaf to water of 1:0.9-1.1, then carrying out enzyme deactivation at a temperature of 90 to 100 DEG C for 115 to 125 seconds, wherein the speed of enzyme deactivation is 1.0 to 1.5 r / min, water is supplemented for every 20 seconds, and the added water accounts for 0.5 to 0.8% of the weight of the fresh tea leaves for each time; and immediately spray-cooling the obtained tea by a spray-cooling machine. The provided method has the advantages that the operation is simple, and the pesticide residue can be effectively removed. An energy-saving, high efficient and environment-friendly enzyme deactivating technology is provided for tea deep processing and effective component extraction of fresh tea leaf. The method has a wide application prospect.
Owner:YUNNAN CHANONG BIOLOGICAL IND
Method for rapidly detecting trace copper in wastewater
InactiveCN102944553AHigh selectivityThe detection process is fastMaterial analysis by observing effect on chemical indicatorOrganic solventSodium diethyldithiocarbamate
The invention discloses a method for rapidly detecting trace copper in wastewater, which comprises the following steps of: firstly enabling copper to react with sodium diethyl dithiocarbamatetrihydrate (DDTC-Na), separating and enriching Cu-DDTC complex in a sample by adopting ionic liquid-salt aqueous two-phase system (ILATPS) to form yellow complex which is enriched at the bottom of an ionic tube, and making a comparison with standard copper content to detect the trace copper in the sample, wherein the detection limit is 1mug / L. The method for rapidly detecting trace copper in wastewater has the advantages that the method is simple to operate, the detection sensitivity is high, organic solvent is not needed, the method is environmental-friendly, the detection time is short and the like, and is a simple, convenient, rapid and accurate analysis method, and has a wide application prospect.
Owner:KUNMING FURUITE TRADE
Device for making hydraulic model
The invention relates to a device for making a hydraulic model, and belongs to the technical field of hydraulic engineering. The device has an international patent classification (IPC) number of E02B 1 / 02, is suitable for making a hydraulic model with a steep side slope or a large terrain height difference, and consists of a beam, an elevation control system, a bracket and a river cross section form control line. When a hydraulic engineering physical model is made, a coordinate origin of a coordinate system is determined above a river cross section; the beam is taken as a horizontal baseline,and scales processed along the horizontal direction can control the starting distance of the river cross section; each elevation control rod in the elevation control system can move up and down, and left and right, and the model relative elevation of each elevation control point is accurately controlled through scales along the vertical direction; the river cross section form control line directly passes through small holes at the tip of the elevation control rods in turn to form a complete river cross section; and construction personnel can make the channel cross section accordingly and thenmake the whole physical model.
Owner:BEIHANG UNIV +1
Manufacturing method of hydraulic model
The invention relates to a manufacturing method of a hydraulic model, belonging to the technical field of hydraulic engineering. The IPC (International Patent Classification) of the hydraulic model is E02B 1 / 02. The manufacturing method is suitable for manufacturing the hydraulic model with a steep side slope or higher topographic height difference and adopts a special topographic manufacturing instrument comprising four parts, i.e. a cross beam, an elevation control system, a support frame and a riverway section morphologic line. When the hydraulic model is manufactured, the manufacturing method comprises the following steps of: firstly determining a coordinate origin of a coordinate system above a riverway section; controlling the starting point distance of the riverway section along a scale processed in a horizontal direction by taking the cross beam as a horizontal datum line; accurately controlling the relative model elevation of each elevation control point along a vertical scale in such a way that each elevation control rod of the elevation control system can move up and down or left and right; and enabling the riverway section morphologic line to directly sequentially penetrate through a small hole positioned on the top end of each elevation control rod so as to form a complete riverway section. Thus constructors can manufacture the riverway section so as to manufacture an integral entity model.
Owner:HOHAI UNIV +1
Walking thread-press type spontaneous electrical shoes
InactiveCN101380150AReduce volumeReduce weightFrom muscle energyMachines/enginesEngineeringElectric power
A traveling tread type spontaneous electric power shoe comprises a shoe body, wherein a pressure type micro-generator is positioned on the heel place at the rear part of the shoe body. The electric power shoe is characterized in that the upper place outside the shoe body is provided with a small pocket which is provided with a mini rechargeable lithium battery, the battery pocket is provided with zipper, a connecting wire positioned between the battery and the pressure type micro-generator is connected with the two ends thereof by a threading hole. The electric power shoe has the advantages of free charging at any time and place without restriction by the charge power supply, small volume, light weight, easy carrying, wide applicable people and wide application scope, and no special technical requirements. Power can immediately be generated and charged while walking with the shoe, which is applicable to charging small electronic equipment, such as mobile phones, MP4, digital cameras, etc.
Owner:李素明
An electrochemical method for measuring the activity of alkaline phosphatase
ActiveCN104391029BRapid determinationEasy to measureMaterial electrochemical variablesActivity concentrationPyrophosphate
Owner:INST OF CHEM CHINESE ACAD OF SCI
Preparation method of Schiff base and application thereof
InactiveCN103755590BStrong specificityLow cloud pointMaterial analysis by observing effect on chemical indicatorImino compound preparationActive agentOrganosolv
Owner:昆明理工大学驾驶培训有限公司
Method for measuring amount of residual penicillin in milk
InactiveCN101776591BSolve detection difficultiesEasy to degradePreparing sample for investigationColor/spectral properties measurementsPenicillaminePenicillin
The invention discloses a method for measuring the amount of residual penicillin in milk. Standard working anhydrous alcohol solution with penicillin sodium is prepared, the pH value is regulated by dilute HCl to 2 plus or minus 0.5 or 4 plus or minus 0.5, the standard working anhydrous alcohol solution is bathed in boiling water, so that degradation products, i.e. penicillamine and penicillenic acid, are obtained, then the two degradation products respectively react with benzoquinone substance, so that charge-transfer complexes are obtained, and the working curves of different charge-transfer complexes are calculated. During measurement, the absorbance of the charge-transfer complex of milk sample is calculated by the same way, and is substituted into the working curve of the charge-transfer complex to work out the amount of the residual penicillin in the milk. The invention takes the lead in directly using the ultraviolet or fluorescent spectrophotometry to measure the amount of the residual penicillin in the milk. The method has the advantages of quick measurement, wide measurement range, high sensitivity, high accuracy and good selectivity, an expensive antibiotic detection instrument does not need to be purchased, the operation method is simple, and the method can reduce the production cost and the operation risk for diary processing enterprises, and therefore having a good application prospect.
Owner:云南健牛环境监测有限公司
Grouting sleeve dissipative element with protection piece
Owner:TONGJI UNIV
Energy dissipating element of grouting sleeve
The invention relates to an energy dissipating element of a grouting sleeve, which belongs to the field of structural engineering for fixing buildings and comprises an inner tube and an outer tube. A cover plate is arranged at one end of the inner tube, the inner tube together with the cover plate is divided into a plurality of independent single blocks along the axis direction of the inner tube, each single block consists of a tubular wall and a cover plate block, the outer wall of the inner tube which is divided into blocks is attached onto the inner wall of the outer tube and inserted into the outer tube so that an inner tube insertion section and an inner tube exposed section are formed, the cover plate which is divided into blocks is disposed in the end of the inner tube insertion section, and expanding cement grout is injected into the inner tube insertion section through the inner tube exposed section, so that an expanding cement grout body is formed. The energy dissipating element of the grouting sleeve is capable of guaranteeing construction quality and increasing friction among sleeves effectively, has the advantages of convenience in processing and mounting, economy and reliability, and can be used as a structural load-bearing component when in an earthquake non-resistant state.
Owner:上海同育建筑科技有限公司
A kind of fluorescent detection method of alkaline phosphatase activity
ActiveCN110501317BEasy to operateHigh sensitivityPreparing sample for investigationFluorescence/phosphorescenceSodium phosphatesHydrolysis
The invention relates to a fluorescence detection method for the activity of alkaline phosphatase, which is characterized in that sodium 4-hydroxyphenyl phosphate (4-HPP) is used as a substrate, molecules of the substrate are hydrolyzed into 1,4-benzenediol (HQ) under the catalysis of alkaline phosphatase in an aqueous solution, 1,4-benzenediol can react with subsequently added 3-(2-aminoethylamino)propyltrimethoxysilane (DAMO) to generate silicon nanoparticles (SiNPs) capable of emitting green fluorescence. The higher the activity of alkaline phosphatase in the system is, the more the generated fluorescent silicon nanoparticles are, and the higher the fluorescence intensity is. Quantitative analysis and detection of the activity of alkaline phosphatase are carried out according to the fluorescence intensity change of the detection solution. Compared with the prior art, the method has the advantages that required reagents and medicines are simple and easy to obtain, the operation is convenient, quick and accurate, and a sensitive and reliable method is provided for quantitative detection of the activity of alkaline phosphatase in a clinical sample. According to the fluorescence detection method, the detection limit is 0.1mU / mL, and the fluorescence detection method has the advantages of high sensitivity, high selectivity, wide linear range and the like.
Owner:CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
A small quick plug-in greenhouse
InactiveCN105432375BPlay a thermal insulation effectReduce typesClimate change adaptationGreenhouse cultivationGreenhouseEngineering
The invention relates to the technical field of agricultural facilities and discloses a small greenhouse fast to insert and install. The small greenhouse comprises a roof frame, stand columns and a base. The base comprises a plurality of straight sleeves, three-way sleeves and house corner sleeves. Three ports of each house corner sleeve are perpendicular to one another. The straight sleeves are connected in series through the three-way sleeves to form the side edges of the base. The adjacent side edges are connected through the house corner sleeves to form a quadrangle frame of the base. The lengths of the opposite side edges of the quadrangle frame of the base are equal. The stand columns are inserted and connected to the upper ports of the three-way sleeves and the upper ports of the house corner sleeves. A roof frame cover is arranged at the top ends of the stand columns. Coverage grids are installed on the outer surface of the roof frame and between the adjacent stand columns. The temporary greenhouse can be set up fast at low cost, the greenhouse is flexible to use due to the size and the height, the installing mode is simple, and the needs for material storage space are small.
Owner:CHINA AGRI UNIV
Reinforced grouting sleeve dissipative element
The invention discloses a reinforced grouting sleeve dissipative element. The dissipative element consists of an inner tube and an outer tube which are coaxially lapped; a cavity is formed between the inner tube and the outer tube, a cement mantle is formed in the cavity, and stirrups are arranged in a grouting cavity. Friction force of contact surface between the expanding cement mantle and the tube is increased by chemical prestress of expanding cement grout; the stirrups can restrain expansion of cracks and prevent the expanding cement grout from cracking so as to improve bearing capacity and hysteretic energy dissipation properties of the dissipative element. The dissipative element can be taken as a common support to bear axial load in a normal service status, and the dissipative element consumes and absorbs seismic energy by relative slip of the inner tube and the outer tube under the action of seismic load. The dissipative element has the advantages of low requirement for machining accuracy, steel saving and low cost. Only the grouting sleeve dissipative element needs to be replaced if the grouting sleeve dissipative element is damaged and disabled in a seismic hazard, which is very convenient.
Owner:TONGJI UNIV
Reversible terrain boundary modeling method applied to hydraulic river model test
PendingCN111611701ATerrain Boundary ReversibleImprove reliabilityDesign optimisation/simulationSpecial data processing applicationsClassical mechanicsEngineering
The invention discloses a reversible terrain boundary modeling method applied to a hydraulic river model test. The method comprises the following steps: (1) according to topographic drawings of different design schemes, analyzing scheme topographic data one by one according to a principle from bottom to top and from outside to inside, and planning modeling control sections of the schemes accordingto a principle from bottom to top and from outside to inside to complete modeling drawings; (2) according to the modeling control sections of all the schemes, extracting modeling control elevation data one by one; (3) drawing a molding lofting section according to the extracted molding control elevation data; and (4) according to the modeling drawing and the modeling lofting section plate, according to the principle of from bottom to top and from outside to inside, conducting lofting and concrete pouring construction forming of all the schemes in sequence, all the schemes are separated through diaphragms, after concrete is solidified, disassembling and assembling can be conducted, and the reversible terrain boundary is obtained. The invention is short in manufacturing period, easy to operate, free of special technical requirements and capable of being widely applied and popularized.
Owner:ZHEJIANG INST OF HYDRAULICS & ESTUARY
Determination method for β-lactam antibiotic residues in milk
InactiveCN101706440BReduce dosageReduce harmMaterial analysis by observing effect on chemical indicatorChemical reactionLow speed
The invention provides a method for detecting β-lactam antibiotic residues in milk. The residues of β-lactam antibiotics in milk are detected by three steps of centrifugation, chemical reaction of β-lactam antibiotics and heavy metals, and UV spectrophotometry. The damage is small; the detection speed is fast, and the entire operation process can be completed within 30 minutes; no need to purchase expensive antibiotic detection instruments, only a low-speed centrifuge and a UV spectrophotometer can be used to complete the detection.
Owner:KUNMING UNIV OF SCI & TECH
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