187results about How to "Achieve continuous change" patented technology

The invention relates to a pavement structure and a testing device for bridge deck pavement bonding interface shearing-resistance characteristic, which are based on mechanics principle and indoor test, effectively simulate road surface and simulate stress conditions, can realize continuous change with 0-80 degrees of shearing angle, meet needs of different working conditions and are suitable for the design and research of the pavement structure, the indoor test and engineering test. The testing device comprises an upper part and a lower part, each part comprises a bearing board, a rolling shaft, an arc base, a semi-circular clamp, an internal collet and a clamp fixing device. The whole device also comprises an angle dial scale and an angle pointer and other attached parts which are used for indicating the size of the angle. A square testing piece is arranged in the internal collet, the semi-circular clamp and the base can rotate relatively, after the shearing angle is set, the clamp and the base are fixed by the clamp fixing device. The horizontal surface of the other side of the base is contacted with the bearing board in a rolling way by the rolling shaft, so as to lead the device loading to generate vertical displacement and to move horizontally at the same time.

The invention provides a cadmium-free core-shell quantum dot and a preparation method thereof; the cadmium-free core-shell quantum dot comprises a quantum dot core, a gradual transition layer continuously grown on the surface of the quantum dot core, and a shell layer formed on the surface of the gradual transition layer, wherein the gradual transition layer comprises core cations and core anions in the quantum dot core, and shell cations and shell anions in the shell layer; in the cadmium-free core-shell quantum dot, the concentrations of the core cations and core anions decrease gradually from inside to outside, and the concentrations of the shell cations and shell anions gradually increase from inside to outside.

The invention discloses a guided wave signal analyzing method based on time delay. The time delay and the linear superposition are carried out on the basis of multiple groups of original signals for detecting ultrasonic guided wave, and multiple groups of original signals are separated in directions and combined into two detection result curves finally. The method comprises the steps of: mounting N sensors, wherein each sensor group corresponds to one channel, the sensors are divided into an A-ring and a B-ring and respectively set in odd number and even number, and the interval between the A-ring and the B-ring is 1/4 of the wavelength of exciting signal central frequency; selecting M windowing modulation sine waves with different central frequencies and the certain periodicity as the exciting signals, wherein the M turns of exciting signals have respective central frequency and bandwidth in the frequency domain, each turn of exciting signals covers a certain frequency range, and M*N*N groups of data are obtained by exciting and changing the central frequencies for many times; and obtaining a final pipeline detection curve graph by the calculation to realize the separation in the direction of detection and the separation of symmetrical and unsymmetrical signals, which is convenient to find out defects on the pipeline.

The invention relates to a method for preparing bismuth telluride alloy membrane through a co-sputtering and sedimentation method. The invention is implemented on a magnetism control sputtering instrument, a high purity bismuth sheet is stuck on a high purity bismuth target through conducting glue, and the compound target is taken as the sputtering target material to perform co-sputtering; the single crystal silicon chip is taken as the membrane lining bottom. The invention has the technology parameters that: the bottom vacuum degree is higher than 1.0*10-3Pa, the working argon gas pressure is 0.2 to 3Pa, the target base distance is 4 to 10cm, the base sheet table is rotated for 5 to 15 circles per minute, the membrane lining bottom temperature is 100 to 300 DEG C, the sputtering power source power is 20 to 100W, and the annealing temperature is 200 to 300 DEG C. The invention has the advantages that the sedimentation membrane components can be easily adjusted by changing the size and quantity of the sticking target on the standard target material; in particular, to the sputtering compound target with larger deposited membrane component difference, and the exploration of the optimum component doping quantity, the method is simple, the feasibility is strong, the product quality is reliable, and the reproducibility is good.

The invention discloses a nozzle liquid mist distribution adjustable rocket engine jet faceplate and a design method. The nozzle liquid mist distribution adjustable rocket engine jet faceplate comprises a gas collecting cavity base, a gas collecting cavity middle plate, a gas collecting cavity rear plate, a fuel cavity top cover, a fire transferring tube and a plurality of double-swirl nozzles, wherein a gas collecting cavity is divided into two oxygen cavities; a fuel cavity is formed between the fuel cavity top cover and the gas collecting cavity rear plate; the plurality of double-swirl nozzles are uniformly distributed along the circumference of the fire transferring tube; each double-swirl nozzle comprises a nozzle inner core, a nozzle inner layer and a nozzle outer layer; an inner mixing cavity is formed between the nozzle inner core and the nozzle inner layer; an outer mixing cavity is formed between the nozzle inner layer and the nozzle outer layer; the nozzle inner core is provided with a fuel jet hole; inner swirl holes are uniformly distributed on a nozzle middle layer along the circumference; and the nozzle outer layer is provided with a large through hole, an outer swirl hole and a jet hole; and the swirl direction of the outer swirl hole is opposite to the swirl direction of the inner swirl holes. The flow ratio of inner swirling eddy to outer swirling eddy can beadjusted by controlling the jet pressure drop of the inner swirl hole and the outer swirl hole, so that liquid mist of different distribution patterns is formed.

The invention relates to a fractional-order KiBaM electrochemical and fractional-order equivalent circuit comprehensive characteristic battery model and a parameter identification method thereof. A model is modeled by a fractional calculus principle so as to be provided with more degree of freedom and more flexibility and innovation. The introduction of the fractional order provides many new phenomena and rules and achieves superiority that cannot be achieved by a conventional integer-order battery model. The KiBaM electrochemical model and the equivalent circuit model are both generalized to the fractional order. Model parameters and orders at different SOC positions are identified on the basis of the least square method. Thus, a variable-order fractional-order battery model based on SOC is obtained so as to realize the advantage complementation of the battery KiBaM electrochemical model and the second-order RC equivalent circuit model. The nonlinear capacity effect and the running time and the output I-V external characteristics of the battery can be described simultaneously, the comprehensive simulation of the internal characteristics and the external characteristics of the power battery is achieved, and a high application value is achieved.

The invention discloses a high-accuracy broadband continuous adjustable real-time time delay line circuit, adopts a method of combining an active coarse adjustment time delay line with a passive fine adjustment time delay line and improves a bandwidth and a time delay range of the time delay line circuit. The active coarse adjustment time delay line comprises an active voltage control time delay unit and a path selection amplifier. The passive fine adjustment time delay line is formed by cascading a plurality of inductor and variable capacitor pairs, by changing a voltage control variable capacitance value, delay time of the fine adjustment time delay line is changed, and the delay time can make up resolution of coarse adjustment time delay, thereby implementing the delay time continuous change of a real-time time delay line. The real-time time delay line carries out time delay accurate control on active time delay units by a time delay calibration loop, so that time delay is not influenced by changes of the outside environment. The circuit has the advantages of high time delay resolution, wide time delay range, high anti-interference capacity, broadband, high integration, low cost and easiness for integration.

The invention discloses a transonic wind tunnel test supporting device, an installation method and application thereof, and aims to solve the problems that the test result is partially distorted, certain potential risk is present and the accuracy of test data is influenced when an aircraft carries out wind tunnel test by adopting an existing concave bent supporting mechanism. In the device, the existing concave bent supporting structure is improved, so that the test result is more accurate; meanwhile, the bearing mode is changed into tension-compression bearing, so that the longitudinal bearing area, rigidity and strength are improved, and model vibration in test is reduced. Under the coordination of a linear supporting rod and a wind tunnel curved knife, the device can realize continuous variable attack angle test, the attack angle variation range is enlarged, and the test efficiency is greatly improved. The device is reasonable in design and simple in structure, can effectively improve the accuracy of data and the efficiency of test and reduce vibration in test, and has a good application prospect.

The invention provides a forming method capable of customizing strength of ultrahigh-strength steel hot-stamped parts. The total electric energy input to steel plates by resistance heating is constant, different cross-sectional area portions are different in input energy in unit cross-sectional area, and heating temperatures are different, so that different strength is obtained. When the input energy in unit cross-sectional area is 825jmm<-2>, steel plates can be heated to a complete austenitizing temperature within 3s, and tensile strength of the steel plates after hot forming reaches above 1600MPa; when the input energy in unit cross-sectional area is lower than 688jmm<-2>, the heating temperature of the steel plates can be lower than the austenitizing temperature, and the tensile strength of the steel plates after hot forming is 600-700MPa. The cross-sectional areas and the sizes of the steel plates are designed according to strength requirements of different portions of components, hot-formed structural parts obtained after hot stamping have optimal strength and plasticity matching, overall weight of original parts is reduced, side-impact deformation resistance of automobiles is improved, and collision energy can be absorbed well.

The invention discloses an adaptive continuously-adjustable cavitation device structure. The adaptive continuously-adjustable cavitation device structure comprises a benchmark chassis, a rotatable telescopic assembly and a drive mechanism assembly which are connected with one another, wherein the benchmark chassis and the rotatable telescopic assembly rotate under the power drive action of a servomotor, and the diameter of an outer edge formed by multiple layers of sector part groups in rotating is continuously adjustable along with rotation changes of the servo motor. In the variable speed sailing process of an underwater sailing body, the adaptive continuously-adjustable cavitation device structure provides power through the drive mechanism assembly to drive the multiple layers of sector part groups of the rotatable telescopic assembly to synchronously expand outward or contract inward, and adjusts the drive mechanism assembly according to change situation feedback of hydrokinetic parameters of an external flow field of the sailing body so as to realize adaptive change of the diameter of a cavitation device, thereby completing control for the size and the form of vacuoles, decreasing the wetting area of the underwater sailing body and reducing pressure difference resistance additionally caused to the utmost, greatly reducing frictional resistance and total resistance, and greatly improving the maximum speed and sailing distance of the sailing body.

The invention relates to a tooth surface distortion compensation method during worm wheel grinding of an axial modified helical gear. The method solves the problem of tooth surface distortion when worm wheel grinding is conducted on a helical gear with axial modification, calculates the additional motion quantity of a grinding wheel during worm wheel dressing according to the warp quantum of a tooth surface on the basis of building a tooth surface warp quantum calculation model during worm wheel grinding of the axial modified helical gear, overlays additional motion on conventional worm wheeldressing motion to change a pressure angle of left and right tooth surfaces of the grinding wheel, and compensates tooth surface distortion by continuously changing the pressure angle in a width direction of the grinding wheel aiming at a continuous change trend of a profile pressure angle of a gear end section during tooth surface distortion, thereby improving the accuracy of worm wheel grindingof the axial modified helical gear.

The invention discloses a display screen, a display device and a display method and belongs to the technical field of display. The display screen comprises a display panel and a dyed liquid crystal box that is positioned no one side of the display panel, and the dyed liquid crystal box is used for controlling an emerging direction of light passing through the dyed liquid crystal box under the action of an electric field. The problem that the display device of the related art has low peep-proof sensitivity is solved, the peep-proof sensitivity of the display device of the invention is improved, and the display screen is used for the display device.

The invention provides a phase mask plate of an integer-order vortex beam with a fractional-order vortex profile. A generated novel vortex beam simultaneously has the topological charge of the integer-order vortex and the light intensity profile of the fractional-order vortex. The phase mask plate generates a vortex beam by inputting the phase mask plate into a reflection type spatial light modulator, wherein the transmission rate function expression of the phase mask plate is a formula which is as shown in the specification, wherein A (x, y) is an amplitude modulation function and is used forchanging the profile of the incident coherent light field so as to improve the quality of the vortex beam and avoid the interference of a phase modulation signal and an amplitude modulation signal; ang (.) is an angle-solving function of an imaginary number; rem (.) is a complementary function; m is the topological charge value of the beam, and n is a phase step factor, wherein n is greater thanm; the phase step can be compressed by changing the value of n, so that the required phase step size is generated; theta is the polar angle of a polar coordinate system; and 2 <pi>x/d is a blazed grating item, and is used for generating a blazed grating with a period of d, so that the energy is concentrated in +1 stage diffraction.

The invention discloses a gas storage gas-oil interaction region well productivity predicating method and device, wherein the method comprises the following steps that a function relationship between the gas reservoir net oil cutting quantity and the pressure is determined, and a study object well in a gas-oil interaction region in the gas storage rebuilding operation process is determined according to the function relationship; the gas reservoir development data or well test data of the study object well is processed, a binomial productivity equation of a gas well is obtained, and the influence factor of the gas-oil interaction displacement productivity reduction is determined; according to the influence factors of the gas-oil interaction displacement productivity reduction, the seepage experiment of the gas storage building process is designed, and the gas phase permeability change condition of each cycle period in the gas storage design service life is tested; the binomial productivity equation of the gas well is amended by seepage experiment results, and the productivity, deducting the seepage capability due to the gas-oil interaction displacement in the gas storage operation process, of the study object well is obtained. The method and the device have the advantage that the well productivity predicating accuracy of the oil cutting gas reservoir reconstruction gas storage can be improved.

The invention discloses a memristor with continuous variable conductivity and a preparation method and application thereof in the field of the micro-electronic technique. The memristor is specificallyformed in a manner that an active electrode and an inert electrode are formed on the surface of a two-dimensional atomic crystalline material at an interval, wherein the two-dimensional atomic crystalline material is a monocrystal two-dimensional atomic crystalline material with the semiconductor characteristics. A semi-insulating atomic-level smooth surface is provided with the migration of themetal cations of the active electrode in an electric field, thereby enabling the metal cations to migrate to form a conductive fine wire so as to achieve the continuous variable of the conductivity ofthe memristor. The method is simple, economical and feasible. The memristor can be applied to the simulation of the learning and memorizing behaviors of a fruit fly.

The invention relates to a detection method for the capture capability of photoelectric tracking equipment to a target with low contrast. The method comprises the following steps of: mounting a target on a focal plane of a collimation objective between a target integrating sphere and a background integrating sphere; adjusting the light flux of an external light source entering the background integrating sphere until a radiance value measured by a spectrum radiance meter reaches set background brightness; adjusting the light flux of the external light source entering the target integrating sphere until a radiance value measured by a spectrum radiance meter reaches set target brightness; and aligning an optical system of the photoelectric tracking equipment to be detected with the collimation objective and continuously changing target and background contrast until a target with the minimum contrast can be captured by the photoelectric tracking equipment. By the invention, the radiance of the target integrating sphere can be continuously changed to obtain different kinds of target and background contrast. The invention provides an optical measurable accurate reference for detecting the capture capability of the photoelectric tracking equipment to a target with low contrast.

The invention relates to a switch-controllable and magnetic field strength-adjustable permanent magnet device which comprises a movable magnet, fixed magnets, pole shoes and a magnet yoke. The fixed magnets are parallelly disposed on the single side or on two sides of the movable magnet to form a magnet component. The magnet component is serially connected with the magnet yoke. The pole shoes are disposed at the top of the magnet component. An air gap is formed between the two pole shoes. The magnetization directions and positions of the fixed magnets keep unchanged, and the movable magnet can rotate around a rotary shaft. Compared with the prior art, the switch-controllable and magnetic field strength-adjustable permanent magnet device is wide in application range, green and energy saving, safe and reliable, small in product size, and the like.

The invention discloses an annular hollow offset-focus laser cladding device, and relates to the technical field of laser processing. The annular hollow offset-focus laser cladding device comprises a shell, a conical reflector, an annular off-axis parabolic focus lens, a nozzle and a powder spraying pipe, the top of the shell is provided with a light inlet, the conical reflector is arranged in the shell, and the conical reflector is arranged facing the light inlet; the annular off-axis parabolic focus lens and the conical reflector are oppositely and coaxially arranged; and the nozzle is installed below the conical reflector, the lower end of the nozzle is connected with the powder spraying pipe, the powder spraying pipe is coaxial with annular hollow offset-focus light formed after reflection of the annular off-axis parabolic focus lens, and a collimation protection gas sleeve is arranged on the periphery of the powder spraying pipe. The annular off-axis parabolic focus lens is used for horizontally shifting the focusing focus of the maternal parabola. According to the annular hollow offset-focus laser cladding device, the homogenization of the energy density of an annular light spot is realized, the coupling effect of a laser beam and powder is improved, the utilization rate of the metal powder is improved, and the cladding quality and appearance are improved.