55results about How to "Fast repeatability" patented technology

The invention discloses a distributed real-time news information acquisition system, and the architecture of the system comprises a central server, a plurality of sub-acquisition nodes and a database server, wherein each sub-acquisition node is responsible for acquiring a news page, communicating with the central server through TCP / IP (transmission control protocol / Internet protocol) and transmitting the acquired news page to the central server, and the central server is used for storing all the downloaded news pages into the databse server. The system can overcome the defects of the prior art and is mainly used for performing high-efficient and stable acquisition against the characteristics of a large amount of news data, fast updating speed and high repeatability; furthermore, the cost is low, and the deployment is easy.

The invention discloses a preparation method for a temperature sensitive response type intelligent ceramic composite membrane and a product. The product is obtained by chemical graft copolymerization of N-isopropyl acrylamide on the surface of a ceramic membrane. The invention takes the ceramic membrane as a basement membrane, takes the N-isopropyl acrylamide as a functional monomer, and adopts a method of chemical graft to prepare the temperature sensitive response type intelligent ceramic composite membrane. The prepared intelligent ceramic composite membrane can overcome the disadvantage of low mechanical strength of an intelligent membrane prepared taking an organic membrane as the basement membrane, has favorable chemical stability, long service life and the environmental sensitivity of a graft monomer, and is easy to disinfect and clean.

The invention relates to a fatigue test device of an automobile sliding column assembly and an experiment method thereof. Two ends of the sliding column assembly (2) are respectively connected onto an upper clamp (3) and a lower clamp (1). A hydraulic actuator (5) is connected with the sliding column assembly (2) through a guide device (4). When the hydraulic actuator (5) moves vertically, a spiral spring (21) and a damper of the sliding column assembly (2) can simulate the spiral spring in the automobile driving process to move vertically. A strain sensor is bonded to the outside of the spiral spring (2) of the automobile sliding column assembly to collect strain value of the spring, and a data collector collects displacement value and force value of the hydraulic actuator (5). The computer modifies value collected by the strain sensor and the data collector according to automobile sliding assembly road load spectrum collected by a road test and reproduces road test condition and environment on the fatigue test device after edition processing of the principle of sliding column assembly damage equivalence.

The invention relates to a testing device and the method for the fabric moisture-penetrability. The device is made up of the column canister, the base, the waterproof moisture film, the pressure ring and the testing board. The shallow groove is set on the base which the two ends are connected with the air inlet and the air outlet carved on the base two sides. The waterproof moisture film is the bottom of the column canister to form the saturate water vapor resource; the dry quick flowing N2 is the carrier to carry the water vapor through the fabric away. So it can measure the relative humidity of the N2 flow to get the moisture content of the fabric. The invention has the high precision and good repetition, the testing time is short and the cost is low; so the device can be used in the textile mill to control the product moisture-penetrability quality.

The invention discloses a device and a method for measuring a magnetoconstriction coefficient by using a Doppler polarizer through a sinusoidal modulation multi-beam laser heterodyne method, which belong to the technical field of micrometric displacement detection. By using the device and the method provided by the invention, the problem that the measurement precision of a conventional method for measuring the magnetoconstriction coefficient cannot meet an ultra-precise measurement requirement is solved. The method provided by the invention comprises the following steps: enabling a plane reflecting mirror and a thickness-regardless thin glass plate to be mutually parallel and equal-height, enabling a distance d between the thickness-regardless thin glass plate and the reflecting surface of the plane reflecting mirror to be 20mm, and turning on a driving power supply of a polarizer, so that the polarizer begins carrying out simple harmonic vibration; and collecting an electric signal output by a photoelectric detector through a signal processing system, processing a collected signal, obtaining a distance variable quantity between the plane reflecting mirror and the thickness-regardless thin glass plate, and obtaining the magnetoconstriction coefficient of an iron-nickel alloy sample to be measured according to the distance variable quantity. The device and the method provided by the invention are applicable to the measurement of the magnetoconstriction coefficient of a ferromagnetic body.

The invention discloses a method for measuring magnetostriction constant by using multi-beam laser heterodynes, which relates to a method for measuring the magnetostriction constant of a material and is used for solving the problem of low precision in a traditional method for measuring the magnetostriction constant. The measuring method disclosed by the invention comprises the following steps of: firstly, carrying out alternating-current demagnetization on a piece to be tested and fixing the piece between two fixed rods; then turning on an H0 solid laser and driving a galvanometer scanner to start working; and finally, applying monotonically-raised direct current on the piece to be tested, wherein in the process of applying the current, a signal processing system is adopted to continuously acquire an electrical signal output by a photoelectric detector, acquire a length variation delta l of the piece to be tested and acquire the magnetostriction constant alpha equal to delta l / l according to the delta l. According to the method disclosed by the invention, on the basis of a laser heterodynes technology and a Doppler effect, length information to be tested is loaded in a frequency difference of a heterodynes signal and is demodulated by the signal to simultaneously obtain a plurality of length values to be tested; and the measurement precision of the length value to be tested can be improved by weighted average processing, and further, the measurement precision of the magnetostriction constant is improved.

The invention discloses a high-throughput functional gene screening method and system for cell phenotypic image quantitative analysis, and belongs to the technical field of gene screening. The methodcomprises the steps of using a full-automatic fluorescence microscope to shoot a cell image of the phenotype to be screened and a cell image without the phenotype to be screened; respectively converting the images into a to-be-screened phenotype and a black-white binary image without the to-be-screened phenotype; then segmenting into an image containing a single phenotypic cell to be screened andan image containing a single phenotypic cell without being screened; taking the corresponding part of the image containing the single to-be-screened phenotypic cell in the cell image of the to-be-screened phenotypic cell as a positive training set, and taking the corresponding part of the image containing the single to-be-screened phenotypic cell in the cell image of the to-be-screened phenotypiccell as a negative training set to obtain a final model capable of identifying the cell phenotypic; and carrying out final model identification on the image of the knockout or overexpression cell of the to-be-screened gene to obtain the relevance between the to-be-screened gene and the phenotype. The method improves the screening efficiency and accuracy.

The invention discloses a quantitative detection method of resistance genes of intestinal bacterial antibiotics; the method comprises the steps of S1, extracting total DNA of intestinal bacteria; S2, using the total DNA of the intestinal bacteria as a template, amplifying antibiotic resistance genes and 16SrRNA gene via PCR (polymerase chain reaction), and linking the amplification products to cloning vectors, and converting host bacteria to obtain positive clones; propagating the positive clones, and extracting plasmids, measuring copy density of the plasmids, diluting at 100 gradient to obtain a standard template, and establishing a standard curve for the copy number and Ct value through fluorescent quantitative PCR; S3, subjecting the positive plasmids and samples to fluorescent quantitative PCR amplification, and calculating the copy number of antibiotic resistance genes carried in the samples to obtain relative content of the antibiotic resistance genes. The method is good in safety and environmental friendliness and low in price, has simple steps, is low in time consumption, has stable and reliable results, has good repeatability, high sensitivity and high practicality, is simple and fast, and has a promising application prospect.

The invention relates to the technical field of fluorescent sensing, and particularly discloses an organic fluorescent material, a fluorescent film and application of the fluorescent film to detectionof nerve agents. The organic fluorescent material is of a following structure (please see the specifications for the structure), a unit A is a phenanthroimidazole substitute, phenanthroimidazole or benzimidazole, a unit B is benzene or cyanophenyl, and a unit C is triphenylamine, benzotriphenylamine, carbazole or 9-phenylcarbazole. The fluorescent film provided by the invention is provided with arigid main chain, is high in conjugation degree and has the high luminous efficiency, meanwhile, local-hybrid charge transfer-state molecules can be constructed through introduction of side chain groups, and thus the organic fluorescent material achieves high-sensitivity detection on the nerve agents; and the fluorescent film has the advantages of low detection cost, high sensitivity, good repeatability, short detection time, significant fluorescence change and the like, the problems of high detection cost and long detection time of an existing nerve agent detection method are solved, and thefluorescent film has good application prospects in the field of detection of the organic phosphoric acid nerve agents.

The invention discloses a high-strength bolt hollow hub node, comprising a hollow hub, the hollow hub is provided with connecting holes for connecting high-strength bolts, and the outer side of the hollow hub is sequentially connected with threadless nuts and connecting bolts through the high-strength bolts. The inner side of the hollow hub is provided with gaskets and nuts for fixing the high-strength bolts, the fastening screws are provided on the non-threaded nuts, and the fastening screws are provided on the high-strength bolts. The chute, the connecting plate is fixedly connected with a rod. The node of the invention can realize the assembled construction of a single-layer reticulated shell, eliminates on-site welding, reduces the heat influence of welding, improves construction accuracy, saves construction time, and can effectively prevent the phenomenon of "false tightening" of bolts, ensuring that the stiffness and bearing capacity of nodes are beneficial Popularization and application of long-span spatial structures.

The invention discloses an injection molding machine, comprising a servo-controlled system, wherein the servo-controlled system comprises a control valve, an oil tank, an oil outlet pipe, an oil return pipe, a fixed displacement pump and a hydraulic cylinder as the power of the injection molding machine, the oil outlet pipe and the oil return pipe are connected with the control valve and the oil tank and are arranged between the control valve and the oil tank, front and rear cavities separated by a piston are arranged in the hydraulic cylinder, the two cavities are respectively connected with the control valve, the fixed displacement pump is arranged on the oil outlet pipe, the servo-controlled system further comprises a servo motor, a rotary encoder, a servo drive controller and a pressure sensor, the servo motor is connected with the fixed displacement pump in a transmission way; the rotary encoder is arranged on the servo motor, and the output signals are input to the servo drive controller; the pressure sensor is arranged on the oil outlet pipe, and the output signals are input to the servo drive controller, and the servo drive controller is electrically connected with the servo motor. The injection molding machine has the following advantages: 1, good energy-saving performance; 2, quick respond speed; 3, high repeat precision; and 4, prolonged service life of the hydraulic system.

A method for manufacturing a selective emitter structure with low surface concentration and a soft doped zone includes the steps that (1) the surface of a substrate to be prepared is corroded and cleaned, and the surface of the substrate is completely dried after cleaning; (2) the clean substrate prepared in the step (1) is soaked in a solution with high oxidability to carry out wet chemical oxidation on the surface of a silicon wafer, and then the surface of the substrate is completely dried; (3) a microcosmic salt aqueous solution of 0.5-20% is deposited on the surface of the substrate in a spin coating and spraying mode, and then the surface of the substrate is dried; (4) phosphorus ink or silicon ink is deposited on an electrode area on the surface of the substrate coated with a phosphorus source in the step (3) in a screen printing mode, and then the surface of the substrate is dried; (5) the temperature of a diffusion furnace rises, nitrogen is introduced into a diffusion quartz tube, when the temperature reaches 780-890 DEG C, the clean substrate prepared in the step (4) is placed into a constant-temperature area of the diffusion quartz tube, a fire door of the diffusion furnace is sealed, and after the temperature of the diffusion furnace is stable, oxygen is introduced into the diffusion quartz tube; (6) the substrate is taken out and cooled after the diffusion process is over.

The invention provides a method for measuring Young modulus through Doppler vibrating mirror sinusoidal modulation of multi-beam laser heterodyne second harmonic and relates to a method for measuring Young modulus. The method is provided for solving the problem that when the existing laser heterodyne measurement method is adopted to measure the Young modulus, the collected laser difference frequency signals and the operation speed of signal processing are not ideal. In the method, a metal wire to be tested is hung on a fixed support to ensure that the metal wire is perpendicular to the reflecting surface of a plane mirror, a laser is opened while the vibrating mirror begins performing simple harmonic vibration; a signal processing system collects the signal output by a photoelectric detector to obtain the distance parameter of a thin glass plate and the plane mirror, the weight of weights is increased, the distance parameter of the thin glass plate and the plane mirror is obtained again, the extension length is obtained according to the obtained two distance parameters; and the Young modulus of the metal wire is obtained. The method has outstanding advantages that the collected laser difference frequency signals have high quality and the operation speed of signal processing is high.

The invention provides a glass reinforced plastic and a glass reinforced plastic swallow tail made of the glass reinforced plastic. The glass reinforced plastic is prepared from epoxy resin, carbon fiber, glass fiber, basalt fiber, metal powder, a plasticizer, a curing agent, a flame retardant, a tackifier and a filler. Through reasonable proportioning of the specific raw materials, the tensile strength of the glass reinforced plastic can be increased to be 550 to 600 MPa from 370 to 500 MPa at present, so that the bending parts of the swallow tail made of the glass reinforced plastic are effectively prevented from being cracked, and the safety of the swallow tail in the braking process is guaranteed; the glass reinforced plastic swallow tail provided by the invention also has excellent corrosion resistance and high-temperature resistance, so that the surface treatment working procedure of the swallow tail can be cancelled in the actual production of brake linings, the production efficiency can be improved, the application environment of the brake linings can also be broadened, and the service life is prolonged.

The invention discloses a silver oxide nano particle / molybdenum sulfide nanosheet heterostructure ultrasonic near infrared catalyst and a preparation method thereof. The silver oxide nano particle / molybdenum sulfide nanosheet heterostructure ultrasonic near infrared catalyst and the preparation method thereof have the advantages that the prepared catalyst uses piezoelectric material molybdenum sulfide as the matrix, the surface of the matrix is loaded with silver oxide nano particles with high catalytic activity and a near infrared photocatalysis effect, the catalyst has the properties of the excellent infrared photocatalyst silver oxide nanoparticles and molybdenum sulfide nanosheets and the piezoelectric effect of the molybdenum sulfide nanosheets under ultrasonic action, carrier separation is benefited, and the generated carrier promotes the photocatalytic activity of the silver oxide; the silver oxide nano particle / molybdenum sulfide nanosheet heterostructure is prepared by the reaction of the hydrothermal precipitation method, and the preparation method is simple in synthesizing process and equipment, simple to operate, low in production cost, high in efficiency, short in reaction period, good in repeatability and promising in industrial application prospect.

The invention discloses a detection system and method of the steel bar tension force of the vertical prestress of a web of a concrete box girder bridge. The system comprises steel stranded wires, a bellows, an anchorage, an anchor backing plate, a non-tension-end anchor backing plate, and a non-tension-end anchorage, the steel stranded wires are sleeved by the bellows, the bellows is located between the anchor backing plate and the non-tension-end anchor backing plate, one ends of the steel stranded wires penetrate through the anchor backing plate and the anchorage, the anchorage and the anchor backing plate maintain contact, the other ends of the steel stranded wires penetrate through the non-tension-end anchor backing plate and the non-tension-end anchorage and are anchored in the web of the concrete box girder bridge, the non-tension-end anchoring plate, the non-tension-end anchorage, the bellows and the anchor backing plate are anchored in the web of the concrete box girder bridge, the anchorage is provided with an acceleration sensor and a vibration exciter, and the acceleration sensor is connected with a computer. According to the system and method, the problem of failure due to over-high prestress loss is thoroughly solved, the failure of a concrete structure of the prestress steel stranded wires can be effectively prevented, and the structural stability and reliability can be improved.

The invention provides an environment-friendly water-based transparent primer. The primer is prepared from, by weight, 25-45% of fluorine-carbon modified acrylic emulsion, 15-25% of styrene-acrylic emulsion, 0.3-0.5% of wetting dispersant, 10-15% of talcum powder, 5-10% of water-based zinc stearate powder, 4-10% of a film forming auxiliary agent, 0.2-0.6% of thickener, 1-3% of an antifreezing agent, 0.3-0.6% of anticorrosion bactericide, 0.3-0.5% of a antifoaming agent, 0.3-0.5% of a flatting agent, 0.2-0.6% of a PH adjusting agent and 4-16% of water. The environment-friendly water-based transparent primer is good in color, transparency and glossiness and low in cost; a paint film of a product is short in drying time, good in transparency, high in glossiness and excellent in mechanical property; the invention further provides a preparation method of the transparent primer, the preparation method is simple in process, easy to operate and good in repeatability, and the product is short in production cycle, high in production efficiency and quite suitable for industrialized production.

The invention discloses a low-platinum composite material based on tungsten oxide / graphene aerogel and a preparation method and application thereof. The preparation method comprises the steps: synthesizing tungsten oxide / graphene hydrogel through a simple and easy one-step hydrothermal gel forming method, and obtaining the tungsten oxide / graphene aerogel after freeze drying; according to the method, uniformly dispersed tungsten oxide nanowires and graphene aerogel with a hierarchical pore structure are combined to form an electrocatalyst composite substrate with the hierarchical pore structure, the electrocatalyst composite substrate serving as a carrier can further improve the stability of the catalyst, low-content platinum is loaded finally, the reaction process is simple, reaction steps are few, the reaction period is short and repeatability is good; the prepared tungsten oxide / graphene aerogel-based low-platinum composite material is high in unit mass activity in an electro-catalytic reaction, has high catalytic stability and fast mass transfer characteristics, and can be widely applied to electro-catalysis, electrochemical sensing or water pollutant treatment materials.

The invention discloses a method for separating extracellular microcapsules from cells, tissue culture supernatant or body fluid, a specialized separating reagent, a kit and application. The method comprises the steps of alienating extracellular microcapsules in cells, tissue culture supernatant or body fluid from a water solution by virtue of a polyethylene glycol (PEG) solution, and concentrating and collecting the settle extracellular microcapsules by virtue of a low-speed centrifugation method. By virtue of the method, 1000mL or above specimens can be processed in each time; compared with ultracentrifugation and chromatography methods, the method has the advantages that the operation is simple, the elapsed time is short, large-sized instruments and equipment are not required, and the repeatability is good; and the problem that the extracellular microcapsules are difficult to separate is solved, and the scientific research and the clinical application of the extracellular microcapsules are promoted.

The invention discloses a detecting system of prestressed steel strand anchorage cable tensioning force. The detecting system comprises steel strands, a rock body, a supporting plate, an anchorage device, and an anchorage body, wherein drill holes are formed in the rock body; the anchorage body which is fixedly connected with the rock body is arranged at the bottom of each of the drill holes; one end of each steel strand is anchored in the anchorage body at the bottom of each of the drill holes through the corresponding drill hole; the other end of each steel strand penetrates through the supporting plate and the anchorage device; the supporting plate is arranged at the orifices of the drill holes, and is anchored in the rock body; the anchorage device is kept in contact with the supporting plate; an acceleration sensor and a hammer vibrator are arranged on the anchorage device; and the acceleration sensor is connected with a computer. The detecting system disclosed by the invention has the advantages of being simple in structure, low in detection cost, and safe and reliable to use; and the detecting system not only can meet the requirement for large-area detection, but also can be adapted to the detection of effective tensioning force of various fasteners consisting of steel strands, anchorage devices matched with the steel strands, and the like. The invention further discloses a detecting method of prestressed steel strand anchorage cable tensioning force.

The invention relates to an oil-electric hybrid hot-chamber die casting machine injection system, which comprises a melting pot sleeve, an injection rod, a servomotor controller and a hydraulic pressurizer, a servomotor drives the injection rod in order to control the injection speed in the process of injection, and the hydraulic pressurizer cooperates with the servomotor controller to drive the injection rod in order to control rapid pressurization in the process of injection. The injection speed is controlled by the servomotor, the servomotor controls multi-stage slow speed, uniform acceleration, multi-stage high speed, speed reduction and braking in the process of injection, and can realize the multi-stage stepless regulation of the injection speed, consequently, the flashless function of die casting is realized, and high-quality net-shaped products can be shaped. Meanwhile, a hydraulic system is utilized to carry out pressurization, pressurization is independently controlled, which can help to shorten the pressurization time, consequently, a large motor does not need to be adopted in order to achieve high increased pressure, and thereby the cost is reduced.

The invention relates to a measuring device and a measuring method for measuring a coefficient of metal linear expansion by Doppler vibration lens sine modulation multi-beam laser heterodyning secondary harmonics, and relates to a measuring device and a measuring method for measuring the coefficient of metal linear expansion. The measuring device and the method aim to solve the problem that the quality of collected laser difference frequency signals and the computing speed of signal processing are nonideal in the process of measuring the coefficients of metal linear expansion by the conventional laser heterodyning measuring method. The measuring device comprises the following steps of: making a reflective surface of a second planar reflector parallel to a thin glass plate mutually; heating a metal rod to be measured uniformly, and opening an H0 solid laser simultaneously; and collecting the temperature inside an electrothermal furnace to acquire temperature variable quantity, collecting electric signals outputted by a photoelectric detector continuously by a signal processing system to acquire distance variable quantity between the second planar reflector and the thin glass plate,and acquiring the coefficient of metal linear expansion. The measuring device and the measuring method have the advantages of high quality of the collected laser difference frequency signals and highcomputing speed of the signal processing.

The invention provides a reagent kit capable of simultaneously detecting virulent viruses and bacteria and a detecting method. The reagent kit is mainly in accordance with 4 pathogenic microorganismsof ebola viruses, Sinkiang hemorrhagic fever viruses, Brucella and anthrax bacillus. The reagent kit comprises a specific primer probe combination for detecting the ebola viruses, the Sinkiang hemorrhagic fever viruses, the Brucella and the anthrax bacillus, a micro-fluidic solid-phase PCR chip on which a specificity probe is fixed, and an RNase-resistant high-stability positive quality control product consisting of virus-like particles containing viral nucleic acid and thalli containing plasmid carrying the specificity nucleic acid. According to the reagent kit, simultaneous detection of theebola viruses, the Sinkiang hemorrhagic fever viruses, the Brucella and the anthrax bacillus can be realized, and the reagent kit has the advantages of being high in detection flux, high in sensitivity, high in specificity, good in repeatability, short in detection time, low in detection cost, low in operation technique requirements, not liable to pollute and the like, and has great application prospects in the field of quick simultaneous detection of various pathogenic microorganisms.

The invention discloses a device and a method for measuring a Young modulus by means of linear frequency modulation multi-beam laser heterodynes second harmonics, belongs to the field of optics and aims to solve the problems of large error and poor measuring accuracy in the conventional method for measuring the Young modulus. Linear polarized light emitted by a linear frequency modulation laser obliquely enters a thin glass plate at an incident angle theta0; a light beam transmitted by the thin glass plate enters a first plane mirror, and is reflected and transmitted repeatedly between the thin glass plate and the first plane mirror which are parallel to each other to obtain multiple beams of light; the light beams repeatedly reflected and transmitted between the thin glass plate and the first plane mirror are converged onto the light-sensitive surface of a photoelectric detector together with reflected light on the front surface of the thin glass plate through a converging lens; the photoelectric detector outputs an electric signal to a signal processing system; the signal processing system is used for processing data in order to obtain the distances between the thin glass plate and the first plane mirror before and after the length change of a metal wire. The device and the method are suitable for measuring the Young modulus.

The invention belongs to the field of photocatalysts, and relates to a cadmium sulfide nanorod / cuprous sulfide nanoshell heterostructure photocatalyst as well as a preparation method and application thereof. According to the cadmium sulfide nanorod / cuprous sulfide nanoshell heterostructure wide-spectrum (visible and near-infrared) photocatalyst prepared by the invention, cadmium sulfide nanorods are taken as a matrix, and a cuprous sulfide nanoshell layer with a near-infrared absorption effect grows on the surface in situ through cation exchange reaction. On one hand, the cadmium sulfide nanorods as a high-catalytic-activity visible-light-driven photocatalyst and the near-infrared light response property of cuprous sulfide are combined. On the other hand, the cuprous sulfide and cadmium sulfide are tightly combined to form a heterojunction, so that carrier separation is facilitated, and the photocatalytic hydrogen production performance is improved. The cadmium sulfide nanorod / cuprous sulfide nanoshell heterostructure is prepared by adopting a cation exchange reaction, the synthesis process and equipment are simple, the operation process is simple, the production cost is low, the efficiency is high, the reaction period is short, the repeatability is good, and the industrial application prospect is wide.

The invention discloses a modular disinfection and epidemic prevention channel capable of being repeatedly utilized and designed. The modular disinfection and epidemic prevention channel comprises a channel body and partitions; the channel body comprises two parallel channel walls and a movable top face; the channel walls are fixedly installed on the ground; the two sides of the movable top face are fixedly installed at the tops of the channel walls; the movable top face comprises a first plate body, a second plate body and a rotating shaft; the first plate body is hinged to the second plate body; the rotating shaft penetrates through the first plate body and the second plate body; the three partitions which are arranged in parallel are arranged between the two channel walls and divide the channel body into a spraying disinfection room and a pre-examination room; a spraying device is arranged in the spraying disinfection room; and a body temperature detection camera is arranged in the pre-examination room. Compared with the prior art, the channel is convenient to quickly build and reuse and is provided with an adjustable herringbone top face structure, the distance between the two channel walls of the epidemic prevention channel can be flexibly adjusted, and garbage and sewage are not easy to accumulate.