771results about How to "Guarantee structure" patented technology

An apparatus and method for safely cannulating a blood vessels, including but not limited retinal blood vessels, is described. In one embodiment, the apparatus can consist of a micropipette / microcannula, micromanipulator and positioner mounted to a base, which is attached to a wrist rest commonly used in eye surgery. The micropipette / microcannula is connected to tubing such that a medication may be injected through the micropipette / microcannula into the blood vessel or conversely, a small quantity of material may be removed from a blood vessel. Alternatively, a catheter, wire or stent may be placed through the micropipette / microcannula to treat or diagnose an area remote from the insertion site. The ability to cannulate a retinal blood vessel should be efficacious in the treatment of vein and artery occlusion, ocular tumors and other retinal, vascular and optic nerve disorders that would benefit from diagnosis and / or treatment. In another embodiment, a self-sealing needle is provided which allows the perforation of a blood vessel or other structure and the minimization of hemorrhaging when the needle is withdrawn from the blood vessel / structure. Another embodiment discloses an ocular implant needle.

The present invention discloses a method for analyzing structure safety, and the method uses valid vibration measurement signals to obtain mutual feedbacks for a structural model analysis and a calibrated structural model to simulate a disaster situation to obtain the critical force exertion and deformation scale of a structure. The method is applied to capture the stability index of the structure to analyze the structure safety or applied for a structure safety evaluation or a health monitoring, or even for a structure multi-hazards safety determination.

An Occluder for occluding a passage in a circulatory system comprises at least one occluding body (4), for occluding the passage, an expanding unit (1) comprising at least one fixation structure for fixing the occluding body (4, 5) within the passage, wherein at least a part of the expanding unit (1) is expanding into said fixation structure thereby expanding the occluding body and a locking unit (2, 3) for locking the expanding unit (1) in its expanded state. The expanding unit (1) comprises a first and a second end and wherein the first end is attached to a first element of the locking unit (2, 3) and the second end is attached to a second element of the locking unit (2, 3), the first and second elements of the locking unit (2, 3) being brought in locking engagement with each other when the occluding body (4, 5) is expanded, wherein the occluder further comprises a jacket (6, 7) which envelops at least a part of the expanding unit (1). This occluder ensures that no parts of the occluder can wander within the human or animal body and enhances the growth of the body tissue over the occluder.

To deal with climate change, the present invention provides an eco-engineering for systematic carbon mitigation, in particular, a comprehensive carbon management system with a group of Stabilized Functional Carbons (SFCs) to reduce the total amount of carbons in atmosphere. SFCs are sourced and manufactured from the carbon-fixed biomass by one of the seven thermo-chemical treatments or one dehydration treatment with no less than 75% carbon conversion rates of the source material. The present invention transforms the perishable biomass into SFCs, which act as a carbon sink with stability and safety for at least 40 years' storage. The primary eco-friendly carbon and non-carbon mitigation are achieved by the sourcing, manufacturing and storage of SFCs. The advanced eco-friendly carbon and non-carbon mitigation are achieved at various pollution emission sources by the resource utilization of SFCs. An annual total amount of 0.5-10 billion tons of carbon emission could be reduced globally.

The present invention relates to an explosion-proof safety structure for column shape lithium battery, particularly relates to a safe and explosion-preventing structure which prevents the battery from ignition or explosion caused by the condition of overcharging described as follows: while the lithium battery is under overcharging condition, a sudden rise of the battery internal temperature takes place and the pressure increases; at the beginning of the sudden rise of temperature, the internal resistance value of the positive temperature coefficient of resistivity board redoubles to slow down the input of current; when the temperature keeps on rising, the electrolyte starts to gasify so as to increase the internal pressure of the battery up to a level which exceeds what the breaker sheet thin portion can take, the thin portion of the breaker sheet breaks to cause an open charging circuit and the charging activity stops; however, the battery internal pressure can not be released, which once exceeds the break pressure of the safety valve, the safety valve explodes to release the pressure.

A system and method for constructing and using modular building blocks. The blocks may include two walls, a course, end conditions, a reinforcing assembly, and vertical and lateral retaining members. The walls may include lateral supports disposed lengthwise on a top and a bottom surface. Lateral retainer members may be disposed into the lateral supports. The walls may also include channels extending from the top surface to the bottom surface. Vertical retainer members may be disposed into the channels. The course may be disposed between and coupled to the walls and characterized by one or more turns. The reinforcing assembly may be set inside the walls and the course. The reinforcing assembly may include wire mesh portions disposed to form interlocks, where the interlocks provide structural support for the channels. The modular building blocks may be coupled together with structurally complimentary end conditions.

The invention discloses a preparation method of a high-thermal conductivity graphene-Sn-Ag composite brazing filler metal, ad relates to a preparation method of a high-thermal conductivity composite brazing filler metal. The preparation method has the following purposes: the problem of graphene floating and agglomeration in the preparation and application process of the composite brazing filler metal is solved by reducing a greater density difference between graphene and an Sn-Ag brazing filler metal matrix through plating a metal on the graphene; meanwhile, the graphene is dispersed more uniformly in the brazing filler metal matrix; and the reliability of sealing and brazing is improved by improving the heat conductivity of the composite brazing filler metal through adding the graphene. The method comprises the following steps: (1) the metal is plated on the graphene; and (2) the ball milling, the mixing and the medium-temperature smelting are performed for the metal-plated graphene and the Sn-Ag brazing filler metal to obtain the high-thermal conductivity composite brazing filler metal. The prepared composite brazing filler metal is high in thermal conductivity, has a higher wettability compared with a traditional Sn-Ag brazing filler metal, and is a composite brazing filler metal accordant with the present development tendency of an electronic industry as a connecting material of traditional large-scale integrated circuits.

The invention relates to an exposed slope ecological restoration construction method using fermented sludge as a medium. The exposed slope ecological restoration construction method comprises the steps of: paving ecological rods on a slope surface of a slope in a contour manner and fixing the ecological rods through anchor rods; after the pavement of the ecological rods, performing bidirectional geogrid pavement to enable the bidirectional geogrid to cover the slope surface of the whole slope, and fixing the bidirectional geogrid on the slope surface of the slope through the anchor rods; spraying an underlying substrate on the slope surface where the ecological rods and the bidirectional geogrid are paved to enable the underlying substrate to cover the whole slope surface and the outer surfaces of the bidirectional geogrid and the ecological rods; after the underlying substrate is basically solidified, spraying a seed layer to enable the seed layer to cover the whole underlying substrate. The provided method achieves very obvious water and soil conservation effects and remarkable ecological fixation function on the slope, simple construction process, easy implementation, high efficiency and good effects, is suitable for large-area application, and has an obvious effect of optimizing the ecological environment and long-term significance.

The invention discloses a method for identifying the aging degree of a silicon rubber composite insulator. The method comprises the following steps: determining the states of umbrella skirt test samples of the silicon rubber composite insulator by taking the operating age limit as reference, and selecting a sample area of each state to obtain an average-value test sample of each state; sampling and cutting into slices; performing microscopic infrared scanning on the slices by taking silicon methyl 1296 cm<-1> as a calibrated peak to obtain microscopic infrared micro-area scanning images of the slices with different age limits; calculating the ageing depth H value from the microscopic infrared micro-area scanning images, fitting the relationship between the H value of the samples with different age limits and time to obtain an ageing model; quantitatively identifying the ageing degree of an unknown sample according to the ageing model. According to the method, the ageing degree of the silicon rubber composite insulator can be quantitatively analyzed by a microscopic infrared Mapping scanning technology; the change of the silicon rubber composite insulator from the surface to the center along with ageing can be observed; the visualization degree is high.

The invention discloses a seismic signal restoration algorithm based on tensor nuclear norm regularization. The method comprises the following steps: S1, constructing an objective function based on Hankel tensor nuclear norm regularization; and S2, solving the objective function by using an ADMM algorithm. According to characteristics of correlation, redundancy and low rank of the pre-stack seismic signal, the invention provides a Hankel tensor nuclear norm regularization method to reconstruct missing seismic data. With a HTR-SVD decomposition method, a Hankel matrix construction mode is applied to a tensor nuclear norm, so that the correlation of a tensor data block is increased, the low-rank performance of the tensor data block is improved, and a problem that a pre-stack seismic signal can not be restored because of lack of a tangent plane is solved; and thus work area data selected randomly can be processed by the method, so that the the robustness and adaptability of processing themissing seismic data are improved. While filling of missing data is carried out, noises in signals are suppressed, so that the signal to noise ratio of the signals is increased.

The invention relates to a carbon ceramic braking pad for a high-speed train and a preparation method of the carbon ceramic braking pad. The carbon ceramic braking pad is made of carbon ceramic composite material; the carbon ceramic composite material comprises the following components in percentage by mass: 16-30 percent of carbon fibers, 20-36 percent of pyrolytic carbon, 28-46 percent of silicon carbide, 6-12 percent of molybdenum disilicide and 2-6 percent of simple substance silicon; the density of the carbon ceramic composite material is 1.8-2.4g / cm<3>; the carbon fibers are uniformly distributed in the carbon ceramic composite material in a three-dimensional network structure. According to the invention, after the high-temperature heat treatment is performed on a carbon fiber felt with the density of 0.20-0.65g / cm<3>, the pyrolytic carbon is generated in the carbon fiber felt through the thermal-gradient chemical vapor deposition carburizing treatment, then the catalytic graphitization treatment, non-immersion type melting infiltration and assembly are performed, so that the carbon ceramic braking pad for the high-speed train is obtained.The carbon ceramic braking pad is simple in preparation technology, moderate in friction coefficient, good in abrasion performance, stable in braking and strong in environmental suitability and can meet braking requirements of the high-speed train with the speed of 200Km / h.

The invention discloses composite high-strength lead-free brazing filler metal for electronic packaging and a preparation method thereof. The composite high-strength lead-free brazing filler metal comprises graphene and lead-free brazing filler metal. The preparation method includes the steps of firstly, dispersing the graphene and lead-free brazing filler metal powder in ethyl alcohol under the ultrasonic action, and subjecting the ethyl alcohol solution with the graphene and the lead-free brazing filler metal powder to ball milling mixing; secondly, performing vacuum drying to obtain mixed powder of the graphene and the lead-free brazing filler metal powder; thirdly, placing the mixed powder of the graphene and the lead-free brazing filler metal powder into a mould to be squeezed to form a precast block, placing the precast block along with the mould in a vacuum furnace to sinter for 3 hours at the temperature of 180 DEG C, and demoulding to obtain the composite high-strength lead-free brazing filler metal. The composite high-strength lead-free brazing filler metal for electronic packaging and the preparation method thereof have the advantage that the problem that a lead-free brazing filler metal welding spot of an existing electronic product needs to bear high strength under working is solved.

The invention discloses a lightweight calcium hexaluminate-magnesia alumina spinel composite microporous refractory aggregate for lightweight refractory castables and a preparation method thereof. The lightweight calcium hexaluminate-magnesia alumina spinel composite microporous refractory aggregate is obtained by taking 3 to 7 weight percent of lime, 12 to 18 weight percent of magnesite and 75 to 85 weight percent of industrial aluminum hydroxide as initiative materials, adding a binding agent in an amount which is 3 to 6 percent of the total weight of the initial materials, performing wet co-grinding and machine molding, drying a green body and then calcining the green body, and crushing a product obtained after calcination. The lightweight microporous aggregate has the advantages of high stability in reducing atmosphere and alkaline environment, excellent thermal shock resistance and thermal insulation property and the like, so that the service life of the material is prolonged andthe loss of energy consumption is reduced.

The invention relates to a preparation of cyclodextrin bonded stationary phase, in particular to a method which prepares bonding-typed cyclodextrin stationary phase by adopting click chemistry reaction; the preparation method comprises two steps: an azid group or alkyne group is led in the surface of silica gel by a silane coupling agent to prepare azide group silica gel derivatives or alkyne group silica gel derivatives; a 1, 3-ring addition reaction of the azid group and the alkyne group which is also the click chemistry is then carried out for 24-72 hours under the temperature of 20-80 DEG C; the cyclodextrin where the alkyne group or azid group is decorated is bonded onto the surface of the silica gel. The bonding reaction provided by the invention has high selectivity, can excellently keeps the structure of the cyclodextrin, and has simple preparation method and wide applicable range; the prepared cyclodextrin bonded stationary phase has high surface bonding quantity, which is suitable for being used for high-effect liquid phase chromatography separation material and is especially applicable for separating strong polar compounds under the mode of hydrophilic liquid phase chromatography.

The invention discloses a catalyst for removing nitrogen oxide and organic pollutant discharged in burning, comprising carbon nanotube and alumina as the carrier and manganese oxide as the active ingredient, the active ingredient in the catalyst accounts for 1 to 10% of the total catalyst mass. The catalyst is prepared by a solvent-thermal method. In the inventive catalyst, CNTs and Al2O3 are simultaneously used as the carrier for the first time, thus the catalyst has big specific surface area and high mechanical strength, at the same tine the temperature of the selective catalytic reaction is reduced, 94.2% of chlorobenzene removing ratio can be obtained at the temperature of 150 DEG C, 88.8% of NOx removing ratio is obtained at the temperature of 200 DEG C. The catalyst can be used for removing the nitrogen oxide (NOx)and dioxin organic pollutant discharged in the high-temperature process in the fire coal power plant, metallurgy industry, garbage burning and the like.

A wind turbine system is disclosed, such wind turbine includes a wind turbine generator, a plurality of turbine blades radially extended from the generator and a wind-catching unit is provided for circularly sheltering the generator, wherein the wind-catching unit comprises a plurality of wind suction channels completely covering four sides and arranged in a side by side manner. Each of the wind suction channels has a wind inlet for sucking wind from outside, a wind outlet towards the generator blades, and a gradually reduced cavity communicating the wind inlet and wind outlet so as to generate a turbulent pressure between the wind inlet and wind outlet in such a manner that when wind from a direction is caught by the respective wind suction channel, the caught wind will be compressed through the gradually reduced cavity so as to effectively blow out from the wind outlet to rotate the generator.

A process for preparing high-dispersity flaky magnesium hydroxide from inorganic magnesium salt includes liquid-phase preciptiation of inorganic magnesium salt and inorganic alkali or sulfur hydride at 25-90 deg.C, adding water-soluble flocculant to obtain irregularly coagulated magnesium hydroxide, and hydrothermal modifying in the modifier solution at 100-250 deg.C. The product has features of high purity (97%), high dispersity, and low cost.

The invention discloses a construction support and method for an overhead large-span heavy-duty cross beam. The construction support comprises a lower bracket supporting structure, an upper bracket supporting structure located above the lower bracket supporting structure, and a middle supporting structure with the bottom supported on the lower bracket supporting structure. The top face of the upper bracket supporting structure is flush with the top face of the middle supporting structure, and the upper bracket supporting structure and the middle supporting structure form a temporary supporting platform for supporting the cross beam to be constructed. A load bearing structure is erected on the temporary supporting platform. The construction method comprises the steps that firstly, the lower bracket supporting structure is installed; secondly, the upper bracket supporting structure and the middle supporting structure are installed; thirdly, the load bearing structure is erected; fourthly, the support is prepressed; fifthly, the upper cross beam is constructed; and sixthly, the support is removed. According to the construction support and method, design is reasonable, construction is easy and convenient, the using effect is good, and the problems that as for an existing floor steel pipe supporting system, cost is high, the erection process is complex, the construction period is long, the construction risk is high, the requirement for supporting stability is high, and the construction progress of the upper cross beam is affected can be effectively solved.

The invention provides a biodegradable algae liquid plastic film, which is characterized by comprising the following components in parts by weight: 100 parts of algae extract, 2-10 parts of polyacrylate alginate jelly resin, 50-70 parts of lignosulfonate, 10-20 parts of humic acid, 20-30 parts of molasses or biochemical fulvate or a mixture of molasses and biochemical fulvate at a weight ratio of 1: 2, 10-20 parts of carboxymethyl cellulose and 300-500 parts of water. In addition, the invention also provides a preparation method of the algae liquid plastic film.

The invention relates to an electric locomotive roof assembly and welding tool, which comprises an integral frame, a gantry and a cylinder, wherein the integral frame consists of a reinforcing ribbed plate, a main beam, an edge beam, a bottom plate and a side wall board; the side wall board and the bottom plate form an inclination angle; a sliding track for mounting the gantry is arranged outside the side wall board; the gantry is provided with a movable cylinder fixing frame and is used for eliminating welding gap between an aluminum plate and the frame to guarantee welding quality; and the effect of reducing welding deformation is reduced by forming rigid fixing force for the aluminum plate and the frame. Side wall pressing cantilevers are uniformly distributed outside the edge beam; and the reinforcing ribbed plate is provided with a positioner connecting pipe. The interference between a product and the tool is eliminated in a movable pressing and fixed pressing combined mode, so that all products can be welded on the tool at one time. The working efficiency is increased. All positioning devices are used for quick and accurate positioning. The stability of the tool is effectively guaranteed, and the product quality requirements are met.

An improved structure for a USB flash drive includes an accommodating base, a circuit board, a sliding seat, a sliding key and a frame body. The circuit board having a connecting terminal on one end thereof and a fingerprint recognizer thereon is inserted into a bottom of the sliding seat for exposing the fingerprint recognizer to a surface of the sliding seat. When in operation, the sliding key is pushed forward to expose the fingerprint recognizer, and further forward movement of the sliding key will cause the sliding seat to move forward to expose the connecting terminal from the accommodating base. When not in operation, the sliding key is pulled rearward to cover the fingerprint recognizer. Further rearward movement of the sliding key will cause the sliding seat to move rearward to retract the connecting terminal in the accommodating base.

The invention relates to preparation of cyclodextrin bonded stationary phase, in particular to a method for preparing cyclodextrin bonded stationary phase by taking click chemistry as bonding reaction process. The preparation method comprises two steps: firstly introducing triazo- or alkynyl onto the surface of silica gel by silane coupling agent to prepare triazo-silica gel derivative or alkynyl silica gel derivative, then carrying out 1,3-cycloaddition reaction on triazo- and alkynyl, namely, click chemistry, in aqueous solution at 20-80 DEG C for 24-72 hours, and binding cyclodextrin decorated with alkynyl or triazo- onto the surface of silica gel. The bonding reaction provided in the invention has high selectivity, can maintain cyclodextrin structure well, so that the preparation method is simple and broad in application range, the surface binding amount of the prepared cyclodextrin bonded stationary phase is high, is suitable to be as high performance liquid chromatography separation material, and especially suitable for separating strongly polar compound in hydrophilic liquid chromatography mode.

The invention discloses a cladding light filtering device for a high-power fiber laser. The device comprises one or more sections of double-cladding optical fibers. The double-cladding optical fibers can partially strip a protection layer and an external cladding in the laser output direction from the small stripping area to the large stripping area at intervals to enable an internal cladding to be exposed, the exposed internal cladding is coated with filtering materials, and the light filtering device is fixed to a heat dissipation metal material or a water cooling plate. According to the cladding light filtering device, the damage to an optical fiber structure is small, light filtering is even, the phenomenon that the temperature of some filtering points is excessively high in the non-even filtering process is avoided, and system stability is improved.

The invention discloses a preparation method of the acellular dried active amnion, comprising the following steps: (1) material processing: taking a human placenta which passes the detection of pathogen and obtained from a full term cesarean section, washing the human placenta with aseptic normal saline, removing blood components from the human placenta, blunt dissecting the amnion from the human placenta perfectly, striking off matrix components from the amnion substrate with a cell curet; (2) repeatly freezing and thawing; (3) washing; (4) freeze drying; and (5) disinfecting and sterilizing with gamma-ray. The method adopts the combination of repeat freeze-thaw method and using decontaminating agent to remove amnion cells, overcomes the defects of bad effects of removing cells by using freeze-thaw method alone, removes amnion cells effectively, keeps the integrity of collagen structure and basement membrane in tissue well, and keeps good mechanical property and no cytotoxicity.

A reactivity control rod adapted to be used in a reactor core of a fast reactor and disposed at a substantially central portion of the reactor core for controlling a reactivity therein. The reactivity control rod includes a wrapper tube surrounded by a plurality of fuel rods in a reactor core, and a plurality of neutron absorber rods arranged in the wrapper tube. At least one of the plurality of neutron absorber rods includes a cladding tube and a mixture filled in the cladding tube. The mixture is composed of a neutron absorber that absorbs a neutron and a neutron moderator that moderates the neutron.

The invention provides an underwater image restoration method based on a fusion countermeasure network, wherein the clear underwater image data set is taken as a real clear underwater image. Taking the turbidity underwater image data set as a real turbidity underwater image; Obtaining a transmittance map of the real turbidity region underwater image through a dark channel prior algorithm, and obtaining depth information of the real turbidity region underwater image through the transmittance map; A multi-layer countermeasure neural network model is constructed, the real turbidity underwater image, its depth information and the real clear underwater image are inputted into the network model, and the real turbidity underwater image is converted into a synthesized clear underwater image through training and iterative feedback. In addition, the restored underwater image is compared with other methods, which provides a basis for the further study of underwater vision task.

A screw includes a head, and a shank connected to the head. The shank includes a lower threaded section that is formed with a first thread, and an upper threaded section that is disposed adjacent to the head, and that is formed with a second thread. The second thread is in a reversed orientation relative to the first thread. The shank further includes an unthreaded section that is disposed between the upper threaded section and the lower threaded section, and that is formed with at least one pair of diametrically disposed fins, and a tip that tapers from the lower threaded section. The fins are disposed proximate to the lower threaded section and distal from the upper threaded section.

The invention relates to a method for preparing modified loess with high adsorption performance. The method comprises the following steps of: (1) after stirring loess, distilled water and acrylic acid uniformly under room temperature, dropwise adding a NaOH solution with neutralization being 40-90% for neutralization to obtain a neutralization solution; (2) then adding hydroxyethyl methacrylate to the neutralization solution and stirring the materials uniformly to obtain mixed liquor; and (3) adding a crosslinking agent glycidyl methacrylate to the mixed liquor, heating the materials to 40-90 DEG C after introducing inert gases, finally adding an initiator ammonium persulfate, stirring the materials for 20-120 minutes when raising the temperature to 50-95 DEG C, thus generating a composite, and washing and drying the composite to a constant weight, thus obtaining the loess-based polymer composite adsorbent. The method has the following advantages that the natural loess is used as the raw material and is modified by acrylic acid and hydroxyethyl methacrylate to obtain the loess-based polymer composite adsorbent; and the loess-based polymer composite adsorbent is applied to treatment of wastewater containing heavy metal ions and dyes and has the characteristics of strong absorbability and large adsorption capacity.

The invention discloses a clapper-type double-magnetic circuit magnetic latching relay. The clapper-type double-magnetic circuit magnetic latching relay comprises a magnetic circuit part, wherein the magnetic circuit part comprises an iron core, an armature, a yoke, magnetic steel, a magnetism-conductive piece and a coil. The yoke comprises a pole surface part, a magnetism-conductive part and a connecting part; the iron core is installed in a coil hole; a pole surface is arranged at the upper end of the ion core, and the lower end of the iron core is connected with the connecting part of the yoke; the magnetism-conductive piece is opposite to the magnetism-conductive part of the yoke, and certain gaps are formed between the bottom of the magnetism-conductive piece and the connecting part of the yoke; the magnetic steel is arranged between the magnetism-conductive piece and the magnetism-conductive part of the yoke; the armature is arranged on the top of the magnetism-conductive piece, the two ends of the armature are opposite to the pole surface of the iron core and the pole surface of the yoke respectively to ensure that when the armature rotates, and the two ends of the armature can be switched alternatively between the part close to the pole surface of the iron core and the part close to the pole surface of the yoke. Due to the arrangement of a double-magnetic circuit structure, the setting state and the reset state of the magnetic circuits are almost symmetric under the condition that the magnetic circuits are not symmetric, and accordingly the balancing-type magnetic circuit structure of the magnetic latching relay is achieved.