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340results about How to "Overcoming demands" patented technology

Automated instrument for nucleic acid extraction and mass spectrum sample application

The invention discloses an automated instrument applied to nucleic acid extraction and continuous operation process of a mass spectrum sample application chip in biomass spectrometry analysis of a nucleic acid sample. The automated instrument comprises three main devices, namely, a nucleic acid extraction and purification device, a nucleic acid liquor relief distributing device and a mass spectrum chip sample application device, wherein nucleic acid in body fluid is extracted by using a magnetic bead method, a mechanical arm is utilized to complete a nucleic acid extraction action, the extracted nucleic acid is dispensed onto a sample board through a dispenser, a pipettor is used for transferring the sample board onto a chip sample application instrument, and the mass spectrum and relatedinformation of the nucleic acid are obtained through laser sampling of a mass spectrometer, so that the nucleic acid is analyzed rapidly, directly and continuously. The automated instrument is high-precision in controlling the volume of dispensed liquor, high-cleanliness in controlling the quality of the dispensed liquor and high-efficiency in meeting sample application requirements of large-batch samples; meanwhile, the samples are uniformly distributed under the control of a computer program, volume errors and possible foreign pollution caused by manual operation are avoided, and the speed and efficiency in sample application are increased at the same time.
Owner:BIOYONG TECH

Method for preparing polymeric nano-micro fiber non-woven fabric

The invention discloses a method for preparing a polymeric nano-micro fiber non-woven fabric. The method comprises the following steps of: firstly, dissolving at least one polymer in at least one solvent to prepare spinning solution; then supplying the spinning solution to a spinneret plate with a series of spinneret orifices so as to make the spinning solution extruded from the spinneret orifices of the spinneret plate to form a trickle of the spinning solution; secondly, stretching and refining the trickle of the spinning solution by utilizing at least one high-speed jet airflow, and accelerating the volatilization of the solvent to form nano-micro fiber; and finally, collecting the nano-micro fiber on a web curtain by utilizing high-speed airflow and suction airflow. The polymer is a fiber-forming polymer; the solvent can dissolve the fiber-forming polymer and has the volatility; a jet angle of the high-speed airflow is between 15 and 60 degrees, and the jet velocity is at least 50 times higher than extrusion speed of the trickle of the spinning solution; the mass concentration of the polymer in the spinning solution is between 2 and 50 percent; and the viscosity of the spinning solution at a spinning temperature is between 10 and 100, 000mP.s.
Owner:上海榕融新材料技术有限公司

Preparation method of nickel-cobalt layered bimetallic hydroxide/graphene electrocatalyst

The invention provides a preparation method of a nickel-cobalt layered bimetallic hydroxide/graphene electrocatalyst, which belongs to the technical field of electrocatalysts. The method disclosed bythe invention comprises the following steps: graphene and cobalt nitrate are uniformly dispersed in a methanol solvent by ultrasonic waves, so that an ultrasonic solution is obtained; the ultrasonic solution is added into a methanol solution of dimethylimidazole, is uniformly mixed and then is enabled to stand, and centrifuging, washing and drying are then carried out, so that a ZIF-67/graphene composite material is obtained; the ZIF-67/graphene composite material and nickel salt are mixed and dissolved in a solvent, refluxing is carried out for reaction, centrifugal separation is then carriedout, obtained precipitate is washed with absolute ethyl alcohol, and drying is carried out to obtain a NiCo LDH/G composite material with a nanoscale morphology. The method disclosed by the inventionovercomes the defects of high requirement on equipment, need for high temperature and high pressure and need for an expensive surfactant existing in conventional synthesis methods, and compared withthe prior art, the preparation method has the advantages of simple process, low cost, easy reaction process control and the like, and is suitable for industrial mass production.
Owner:GUANGXI NORMAL UNIV

Multi-micronano detector networking joint demonstration verification system based on intelligent mobile robot

The invention relates to a multi-micronano detector networking joint demonstration verification system based on an intelligent mobile robot, comprising a ground synergic control workstation, a synergic control model library, a satellite wireless communication equipment simulator, an intelligent mobile robot, a GPS (Global Positioning System) receiver, video navigation equipment and a display terminal, wherein the ground synergic control workstation controls the synergetic work and the formation transform and maintenance of the whole system; the synergic control model library provides a control algorithm and a control model for the ground synergic control workstation; the satellite wireless communication equipment simulator provides a communication link between satellites and the workstation; the intelligent mobile robot as a carrier of the GPS receiver and the satellite wireless communication equipment simulator is controlled by the control workstation to move and used for simulating the relative position change among the satellites; the GPS receiver and the video navigation equipment realize the relative navigation among the satellites; and the display terminal displays a networking joint verification result in real time. The invention can effectively decrease the test cost of a multi-micronano detector networking detection system, shortens a research and development period and has important engineering application values.
Owner:BEIHANG UNIV

Communication protocol signal identification method based on depth residual network

The invention belongs to the technical field of radio signal identification, in particular to a communication protocol signal identification method based on a depth residual network. The method comprises the following steps of: performing time-frequency analysis on a communication protocol signal in a sample library, and converting a time-frequency spectrum diagram of the signal into a gray-scaleimage; training The depth residual network model by gray-scale image. The trained depth residual network model is used to detect and identify the specific communication protocol signals trained in thetransmission process. As that depth residual network is applied to the field of communication signal identification, the invention overcomes the defect of high signal quality requirement and high prior information requirement of the traditional method, etc. At low SNR, multipath delay, When Doppler frequency offset and some features of signal are obscured by strong interference noise, Doppler frequency offset can still accurately identify the protocol type, and it does not depend on the prior information of received signal, so it can directly process the received IF signal, and has robust performance and high efficiency, which provides ideas for the subsequent research in this field, and has strong practical application value.
Owner:PLA STRATEGIC SUPPORT FORCE INFORMATION ENG UNIV PLA SSF IEU

Novel flotation column and flotation method thereof

InactiveCN104841571AAchieve static flotation separationAvoid easy cloggingFlotationPulp and paper industryAir bubble
The invention relates to a novel flotation column and a flotation method thereof. The novel flotation column comprises a column body and a stirring and foaming mineralization device. The stirring and foaming mineralization device comprises a shell and a stirring mechanism, wherein the shell with one end closed and the other end open is arranged on the outer side of the bottom of the column body and is communicated with the column body, the stirring mechanism is arranged in the shell, and the inside of the shell is communicated with air, a pulp mixing and stirring drum and a circular pulp outlet in the bottom of the column body through pipelines. The flotation method of the flotation column includes that the stirring mechanism moves to generate negative pressure, the air, the circular pulp and mixed fluids of pulp in the pulp mixing and stirring drum and chemicals are sucked into the shell, the air forms bubbles in the shell under the action of the stirring mechanism, the bubbles and hydrophobic mineral grains in the pulp collide sufficiently to form mineral laden bubbles, and the mineral laden bubbles are delivered into the column body to be subjected to static flotation separation. The novel flotation column and the flotation method thereof have the advantages that sufficient turbulent-state mineralization intensity before the bubbles enter the inside of the column body can be guaranteed, pipeline blockage can be avoided, and a good static separation environment is provided.
Owner:WUHAN INSTITUTE OF TECHNOLOGY

High-performance metal-matrix composite preparation method

The invention provides a high-performance metal-matrix composite preparation method. The method comprises steps: granular raw materials: Al, Fe, Cr, Co and Ni metal powder are acquired; under argon atmosphere protection, a high-entropy alloy powder body is prepared via a ball mill; a pure copper powder body and the high-entropy alloy powder body are weighed; the two are subjected to ball milling and mixing under the argon atmosphere protection, and composite powder is obtained; the composite powder is put in a cold pressing grinding tool, uniform pressurization is carried out, and after packing, a cold pressing green body is taken; the composite after cold pressing is put in a graphite grinding tool of an atmosphere protection sintering furnace, temperature rises to 800 DEG C, hot pressing is carried out and packing is carried out for one hour after temperature of the furnace is stable, and circulating nitrogen is provided during the whole process; and when the furnace is cooled to the room temperature, the copper-matrix composite is obtained. Compared with the prior art, by adopting the above preparation method, the high-entropy alloy and the metal matrix have good mutual dissolution and diffusion performance, the preparation process is simple, the high-entropy alloy has good hot stability, the composite has high density, the interface is good, and the mechanical performance is excellent.
Owner:XIAN TECHNOLOGICAL UNIV

Method for preparing environment-friendly plasticizer by recycling waste resources

The invention relates to a method for preparing an environment-friendly plasticizer by recycling waste resources. The method comprises the following steps of transferring alkali-reduction wastewater containing sodium terephthalate into an acid precipitation tank with a stirring device and adding sulfuric acid to further precipitate terephthalic acid (PTA) solids; carrying out plate-frame filtration on the mixed solution to obtain a crude PTA material; adding the recovered crude PTA material into an esterification reactor with an alcohol-water separation device, adding iso-octanol, heating and dehydrating, adding tetrabutyl titanate as a catalyst and carrying out esterification reaction; after water is no longer produced, stopping reaction and dealcoholizing to obtain a crude DOTP (Dioctyl Terephthalate) product; rectifying the prepared crude DOTP product in a packing-type rectifying tower to obtain a rectified product, adding the rectified product into a neutralization reaction kettle, adding sodium hydroxide lye, stirring and washing with alkali; standing, precipitating and discharging the aqueous solution in the lower layer, adding hot water, stirring and washing with water, standing, precipitating and discharging the moisture in the lower layer, carrying out temperature-raising dehydration, adding an inorganic filter aid and filtering to obtain the pure DOTP product. By the method, the recycling of the waste resources is achieved.
Owner:INST OF CHEM IND OF FOREST PROD CHINESE ACAD OF FORESTRY

Shape memory polymer pipeline and use of shape memory polymer pipeline as aircraft engine intake

The invention relates to a shape memory polymer pipeline and use of the shape memory polymer pipeline as an aircraft engine intake, in particular to a shape memory polymer pipeline and use thereof, which solve the problem that a structure of the conventional aircraft engine intake cannot be deformed according to requirements, so air inflow cannot be regulated and the shape of the air intake cannot be changed to cause that the through capacity of the aircraft engine intake is discordant with the requirement of an engine to influence the aerodynamics performance of an air engine. The shape memory polymer pipeline is made of a shape memory composition material, and the shape memory composition material consists of 5 to 98 volume parts of shape memory polymer materials, 2 to 95 volume parts of reinforcement phase materials and 0 to 100 volume parts of resistance heating materials; and the shape memory polymer pipeline serving as the aircraft engine intake overcomes the defect that the structure of the conventional air intake cannot be deformed according to the requirements, and regulates the air inflow and changes the shape of the air intake, so that the through capacity of the air intake is in accordance with the requirement of the engine to improve the aerodynamics performance of aircrafts.
Owner:HARBIN INST OF TECH

Radar radiation source identification method and device based on extended residual network

The invention belongs to the technical field of radar signal processing, and particularly relates to a radar radiation source identification method and device based on an extended residual network. The radar radiation source identification method comprises the steps: carrying out the time-frequency analysis of a radar signal, and converting the time domain waveform of the radar signal into a two-dimensional time-frequency image; preprocessing the time-frequency image to obtain input data of a deep learning network; and constructing an extended residual deep learning network model, and for input data, self-learning signal time-frequency image features by using the network model and carrying out classified identification. According to the radar radiation source identification method, the problems that a traditional method is sensitive to noise, low in extraction characteristic effectiveness and universality and the like are solved, and the excellent identification effect can still be kept for complex multi-class radar signals in the environment with the low signal-to-noise ratio; the radar radiation source identification method can solve the problems that a simple depth model is weakin learning ability, confusion time-frequency image similar signals and the like, and is good in confusion resistance, accurate in identification result and high in identification accuracy; and the radar radiation source identification method can be applied to radar radiation source identification of more types, and has very high adaptability and popularization.
Owner:PLA STRATEGIC SUPPORT FORCE INFORMATION ENG UNIV PLA SSF IEU

Method and device for forming micro-texture in composite mode on inner surface of cylinder sleeve through laser

The invention provides a method for forming micro-texture in a composite mode on the inner surface of a cylinder sleeve through laser. The method comprises the following steps: step (1), a femtosecond laser device is used for processing a needed microcosmic shape on the inner surface of the cylinder sleeve; and step (2), a nanosecond laser device is used for strengthening the area of the microcosmic shape processed in the step (1) through laser shock waves. Under the condition of dry friction, micro-concave surface texture can be used as a storage device for storing wear particles to reduce abrasive wear and furrows on the friction surface, and therefore the wear rate is lowered. The laser shock waves can eliminate residual tension after the micro-texture is formed on the inner surface of the cylinder sleeve, and therefore deep residual compressive stress is formed, grain refinement is enabled to be more uniform, the hardness, the abrasive resistance and the anti-fatigue performance of the cylinder sleeve are improved, and the service life of the cylinder sleeve is prolonged. The invention further provides a device for forming the micro-texture in the composite mode on the inner surface of the cylinder sleeve through the laser at the same time.
Owner:WENZHOU UNIVERSITY +1

Energy balance-based control method of main steam pressure of supercritical CFB (circulating fluidized bed) boiler

An energy balance-based control method of main steam pressure of a supercritical CFB (circulating fluidized bed) boiler includes the steps: S1, after a main steam pressure deviation signal P<T>-P<TS> of a unit is regulated by a PID (proportion integration differentiation) regulator, a signal A is output; S2: a steam turbine demanded heat signal is acquired through a steam turbine energy demand model; S3, a heat signal provided by boiler energy is acquired through an instant carbon mechanism model; S4, subtracting the steam turbine demanded heat signal E<R> by the heat signal E provided by boiler energy is performed, regulating is performed with the PID regulator, and a signal C is output; S5, after subjected to time differentiation, the steam turbine demanded heat signal E<R> is multiplied by a proportional gain k so as to obtain an output signal B, and a sum of the signals B, A and C is output to a boiler master controller; S6, coal feed is regulated according to master control output of a boiler so as to control the main steam pressure. The method has the advantages that regulating quality of the unit can be improved, stability of a main steam pressure control system of the supercritical CFB boiler is improved and ability to respond to load response of the unit is satisfied.
Owner:TSINGHUA UNIV

26-pair PCR primer for mitochondrion sequencing and parting method based on the primer

The invention relates to a detection method of nucleic acid, particularly discloses a whole base sequence typing of mitochondria and a determination method thereof, specifically 26 pairs of PCR primer for mitochondria sequencing and a typing method based on the primers. The 26 pairs of PCR primer which are adopted by the invention cover the total length of mitochondria genome, wherein, primer 15-1, 15-2, 15-3, 24-1 and 24-2 are designed renewedly based on Chinese population and has the pertinence of the typing of Chinese population. The amplified fragment which corresponds to the primer 24-1 is the minimum and equals to 420bp. The amplified fragment which corresponds to the primer 22 is the maximum and equals to 1162bp. The dimensions of all PCR fragments are moderate and favorable for PCR amplification. The 26 pairs of PCR primer of the invention is utilized in the laboratory of applicant for investigating the community information of Chinese nation, and the whole sequence information of Chinese population is submitted to GENEBANK databases. The result shows that the invention can be definitely applied in the field of individual recognitions, paternity testing and gene diagnosis of the field of forensic medicine, anthropology, genetics and disease.
Owner:XI AN JIAOTONG UNIV

Plane two-degree-of-freedom seven-rod closed chain type reach stacker for containers

The invention relates to a plane two-degree-of-freedom seven-rod closed chain type reach stacker for containers. The plane two-degree-of-freedom seven-rod closed chain type reach stacker for the containers comprises a suspension arm and a suspension lifting and telescoping mechanism, wherein the suspension arm comprises a rotating arm and a telescopic arm; the rotating arm is hinged to the rear part of a frame; the telescopic arm is mounted on the rotating arm through a sliding pair; a clamping device is arranged at the front end of the suspension arm; the suspension arm lifting and telescoping mechanism comprises five-rod linkage mechanisms which are symmetrically arranged on the two sides of the suspension arm; each five-rod linkage mechanism comprises a front rocker, a front connecting rod, a rear connecting rod and a rear rocker; the front rockers and the rear rockers are hinged to the front part and the middle part of the frame respectively; the hinged points between the front connecting rods and the rear connecting rods are arranged on the telescopic arm. Ascending, telescoping and descending of the crane are realized under the drive of the five-rod linkage mechanisms. The plane two-degree-of-freedom seven-rod closed chain type reach stacker for the containers has the advantages of small movement inertia, flexible track output, high precision, high rigidity, excellent dynamic performance, high reliability and the like.
Owner:QINZHOU UNIV

Integrally-formed shoulder tab mould

InactiveCN104005183ASolving technical problems with high operational requirementsWay to overcomeWork-feeding meansEngineering
An integrally-formed shoulder tab mould is formed by a base plate, a cover plate, a clamping plate and a fixing piece; one side of the base plate is hinged to the cover plate which comprises the same structure with the base plate and the cover plate and the base plate are in mirror symmetry; the base plate is formed by a base plate positioning plate, a base plate backing plate, a base plate cover plate, a left base plate clamping plate and a right base plate clamping plate; the base plate backing plate is composited between the base plate positioning plate and the base plate cover plate; a base plate seam through groove which is adaptive to a shoulder tab in shape is formed in the middle of the base plate positioning plate; a base plate cover plate through groove is formed at a base plate cover plate position which is corresponding to the base plate seam through groove; the left base plate clamping plate and the right base plate clamping plate are arranged in a base plate clamping plate through groove in an embedded mode, wherein the base plate clamping plate through groove is formed between the base plate positioning plate and the base plate cover plate. According to the integrally-formed shoulder tab mould, the base plate, the cover plate, the clamping plate and the fixing piece are matched with each other and accordingly the integral forming is achieved and the technical problems that the machining mode is complicated, the positioning is inconvenient, and the requirements for the operation level of workers are high in the process of shoulder tab manufacture are fundamentally solved.
Owner:TIANJIN SANDA CLOTHING

Two-position three-way electromagnetic reversing valve for deep-sea collection

A two-position three-way electromagnetic reversing valve for deep-sea collection comprises an end cap, a valve body, a left valve seat, a double-end conical valve core, a right valve seat, an electromagnet and the like. Openings A, B and C are formed in the valve body, the end cap, the valve body and the electromagnet are sequentially connected, the left valve seat, the double-end conical valve core and the right valve seat are sequentially disposed inside the valve body from left to right, a conical valve hole is arranged in each of the left valve seat and the right valve seat, an annular groove is formed in each lateral cylindrical face, multiple uniformly-distributed connecting holes are formed in each annular groove and communicated with the conical valve holes inside the respective valve seats, a connecting groove on the double-end conical valve core communicates a left-side inner cavity between the left valve seat and the double-end conical valve core with a right-side inner cavity between the double-end conical valve core and the right valve seat, the double-end conical valve core is connected with an armature pushing rod penetrating the right valve seat, horizontal moving of the double-end conical valve core is realized by controlling a coil to be powered on and off, the opening A and the opening B are externally connected with deep-sea high pressure, the opening A is externally connected with a water incoming one-way valve, and the opening C is communicated with low pressure.
Owner:BEIJING UNIV OF TECH

Plane two-degree-of-freedom seven-rod servo drive reach stacker for containers

The invention relates to a plane two-degree-of-freedom seven-rod servo drive reach stacker for containers. The plane two-degree-of-freedom seven-rod servo drive reach stacker for the containers comprises a suspension arm, a suspension arm lifting mechanism and a suspension arm telescoping mechanism, wherein the lower end of a rotating arm of the suspension arm is hinged to the middle of a frame; a telescopic arm of the suspension arm is mounted on the rotating arm in a sliding manner; the suspension arm lifting mechanism comprises a lifting rocker and a lifting connecting rod; the lower end of the lifting rocker is hinged to the front part of the frame; the upper end of the lifting connecting rod is hinged to the rotating arm; the lifting rocker is hinged to the other two ends of the lifting connecting rod; the suspension arm telescoping mechanism comprises a telescopic rocker and a telescopic connecting rod; the lower end of the telescopic rocker is hinged to the rear part of the frame; the front end of the telescopic connecting rod is hinged to the telescopic arm; the telescopic rocker is hinged to the other two ends of the telescopic connecting rod. The plane two-degree-of-freedom seven-rod servo drive reach stacker for the containers realizes clamping, lifting and carrying operation of the containers under the combined drive of the suspension arm lifting mechanism and the suspension arm telescopic mechanism, and has the advantages of small movement inertia, flexible track output, high precision and the like.
Owner:QINZHOU UNIV

Hot stamping bake toughening steel based on carbon partitioning principle and processing method thereof

ActiveCN104195455AImprove performanceLoose timing for allotment transfersHot stampingChemical composition
The invention relates to the field of metallurgical materials, also belongs to the field of advanced high-strength steel for cars and particularly provides hot stamping bake toughening steel based on a carbon partitioning principle and a processing method thereof. The hot stamping bake toughening steel comprises the following chemical components in percentage by mass: 0.2-0.5% of C, 0.25-1.5% of Mn, 0.2-0.6% of Cr, 0.2-1.0% of Mo, 0.1-0.8% of Ni, 0.2-1.2% of Si, 0.2-0.5% of Al, 0.002-0.004% of B, 0.02-0.03% of Ti, 0.5-1.5% of Cu, less than 0.01% of S and less than 0.01% of P. The processing method comprises the following steps: heating a steel plate until complete austenitizing, then immediately transferring onto a hot stamping apparatus, stamping, performing intra-mold pressure-maintained quenching, demolding, and cooling in air to room temperature, wherein the structure is martensite+unstable residual austenite; and performing baking treatment in a car body baking temperature range, and ensuring that carbon partitioning is performed to stabilize the residual austenite, thus finally obtaining a multiphase structure of the stable martensite and residual austenite, wherein the comprehensive property is consistent with that of traditional Q&P steel. According to the invention, on the basis of keeping the advantages of the Q&P steel, the disadvantages of the Q&P steel such as need of an independent isothermal partitioning apparatus and requirement for high transfer speed are overcome.
Owner:INST OF METAL RESEARCH - CHINESE ACAD OF SCI

Rapid molding method of sodium silicate sand mould

The invention discloses a rapid molding method of a sodium silicate sand mould and belongs to the field of rapid casting. The rapid molding method comprises the following steps: (1), establishing a three-dimensional entity model of a sodium silicate sand mould to be molded, taking the Z axis as the molding direction, and setting molding layer thickness; (2), first, paving one layer of molding sand material, and then spraying an adhesive so as to form the current layer of outline pattern, wherein the adhesive is a mixed solution of sodium silicate and polyvinyl alcohol; (3), carrying out microwave heating on the current layer of outline pattern, and forming the current layer of sand mould outline; (4), stopping microwave heating, and lowering the work table for a height of one layer thickness along the Z axis; and (5), repeating steps (2-4) until the sodium silicate sand mould is molded. The method meets the high requirement of sodium silicate sand hardened through microwave heating on the mould, solves the problems that the surface of the sodium silicate sand mould becomes powdery due to overheating and easily absorbs moisture, and further overcomes the poor feasibility, difficult molding sand storage and difficult molding sand recycling defects of the existing micro-injection bonding sodium silicate sand rapid molding technology.
Owner:HUAZHONG UNIV OF SCI & TECH
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