161results about How to "Overcome range" patented technology

The invention discloses a gallium nitride sensor, a preparation method and a multi-sensor system. The sensor comprises a heterostructure semiconductor substrate and a transistor which is located on the heterostructure semiconductor substrate, based on III-group nitrides and of an HEMT structure. Metal of the source electrode and metal of the drain electrode are both arranged on the portion, on the top layer of the transistor, of the semiconductor. A functionalized membrane obtained through functionalized processing is arranged on the surface of the grid electrode, and an induction area is formed in the exposed grid electrode area between the source electrode and the drain electrode. By detecting the current changes of the induction area, the concentration of to-be-detected substances making contact with the induction area is detected. By means of the scheme, the defects that in the prior art, sensitivity is low, the detection range is small and portability is poor can be overcome, and the advantages of being high in sensitivity, large in detection range and good in portability are achieved.

The invention discloses a novel rotating travelling-wave ultrasonic motor. The ultrasonic motor comprises the following main parts: two stators, a rotor, a pedestal, a friction pad, a check ring, a bearing and the like. The two stators which are in a same shape are symmetrically arranged and compact on two end faces of the rotor. Working faces of the two stators can be parallelly contacted with a surface of the rotor so that a contact surface of the stators and the rotor bears stress evenly. In a current rotating travelling-wave ultrasonic motor based on a single stator structure, radial contact between the stator and the rotor is nonuniform, a contact scope is small, and radial sliding friction losses and other defect are existed in the stator and the rotor. By using the ultrasonic motor of the invention, the above defects can be overcome. A maximum output torque and an efficiency of the rotating travelling-wave ultrasonic motor can be increased and a service life of the rotating travelling-wave ultrasonic motor can be prolonged.

The invention discloses a system and method for transmitting a terahertz radar signal based on digital pre-distortion. The system comprises a radar signal generation module, a clock control module, a digital pre-distortion module, a digital up-conversion module, a digital-to-analog conversion module, a frequency mixing module, a terahertz frequency doubling power amplification module and a radar antenna. The method comprises the steps of receiving data, updating a weight coefficient, obtaining a non-linear compensation signal, obtaining a digital up-conversion signal, obtaining a radio-frequency signal, conducting frequency doubling amplification, and transmitting a terahertz signal. By the adoption of the digital pre-distortion module, non-linear compensation is carried out on a digital baseband signal at the front end of a terahertz radar, and the performance of the terahertz radar transmission system is improved. The digital pre-distortion method is achieved by the adoption of a high-speed field programmable gate array, and the effective bandwidth and the spectral efficiency of the signals are improved.

The invention discloses a method for achieving role treading track animation by using Bezier curve. The method mainly includes: storing animation object parameters into one or more animation channels; in each animation channel, setting a series of key frames for the animation to impel the motion state of the animation in the default time; performing interpolation calculation among the animation key frames in each channel, thus enabling a role to walk along an appointed curve, and thereby forming a vivid role animation effect. The method for achieving role treading track animation by using Bezier curve can overcome the defects that the prior art is tedious in operating process, high in cost and small in application range, thus achieving the advantages of concise operating process, low cost and wide application range.

The invention discloses a three-dimensional video color calibration method based on scale invariant feature transform (SIFT) characteristics and generalized regression neural networks (GRNN), which comprises utilizing an SIFT characteristic matching extraction method to respectively extract SIFT characteristic points between viewpoint images to be calibrated and reference images, calculating matching characteristic point pairs, and obtaining color values of the characteristic point pairs; using GRNN networks and combining the color values of the matching characteristic point pairs to construct GRNN neural networks reflecting mapping relationships between the viewpoint images to be calibrated and the reference images; and inputting images to be calibrated into the constructed GRNN neutral networks to be calibrated in color and outputting images having been calibrated in color. The three-dimensional video color calibration method based on SIFT characteristics and GRNN has the advantages of being wide in application scope, simple in calculation process and high in accuracy and stability.

The invention discloses a light weight class safe protocol certification system and method for radio frequency identification equipment. The system comprises a server end, a reader-writer end and an electronic tag, which are connected in sequence, wherein the server end is used for establishing and storing a reader-writer information table and a tag analysis information table, and establishing communication connecting with the reader-writer end to certificate the a reader-writer to be certificated; the reader-writer end is used for writing corresponding information in the reader-writer information table stored by the server end into OEM configuration data of the radio frequency module of a legitimate reader-writer, and establishing communication connecting with the server end to certificate the reader-writer to be certificated; and the electronic tag is arranged on a corresponding product for identifying the corresponding product. The light weight class safe protocol certification system and method for radio frequency identification equipment can overcome the defects of poor safety, small application range and high energy consumption in the prior art and has the advantages of good safety, wide application range and low energy consumption.

The invention discloses a cloud platform management monitoring system and method. The cloud platform management monitoring system mainly comprises a three-level firewall module used for effectively blocking cracker invasion, an information monitoring module used for intercepting pornographic pictures, and a service charging module used for detecting resource charging condition in real time and taking measures in a very short time to recover normal charging. The cloud platform management monitoring system and method can overcome the defects of small application range, poor generality, poor expansibility and the like in the prior art and has the advantages of large application range, good generality and good expansibility.

The invention discloses an object absorbing device. The object absorbing device comprises a shell with the cross section being circular, a cavity with the cross section being circular is formed in the shell, and the cavity is provided with a closed end face and an opened end face. The opened end face forms an end face for absorbing an object, the closed end face is provided with a motor, and fan blades arranged inside the cavity are connected with an output shaft of the motor. The object absorbing device is characterized in that the closed end face is in an airtight state, and the fan blades are in linear distribution along the axis of the cavity. In the working process, the shell on the circumference of the opened end face can apply absorption force on the object under the condition that the shell makes contact with or does not make contact with the object. The object absorbing device can be widely applied to absorbing and grasping objects, is suitable for the objects with large surface roughness and can also be adaptive to the object tilting condition, and the advantage of being small in energy consumption is achieved as well.

The invention discloses a noise reducing method and system, an electronic expansion valve and an air conditioner. The method comprises the steps that a primary sound source of environmental noise is collected, wherein the environmental noise comprises electronic expansion valve noise serving as a noise source and / or near-field noise of the noise source; active noise reducing processing is performed on the environmental noise on the basis of the collected primary sound source. According to the scheme of the noise reducing method and system, the electronic expansion valve and the air conditioner, the detects that in the prior art, the noise reducing effect is poor, the application range is small, and the reliability is low are overcome, and the advantages of being good in noise reducing effect, large in application range and high in reliability are achieved.

The invention relates to a preparation method of a superhydrophobic nanomaterial. The preparation method comprises steps as follows: firstly, nano silica is ultrasonically dispersed in a part of an absolute ethyl alcohol solution, then, a silane coupling agent is added to a mixed solution to be rapidly stirred for 2 h (at the water bath temperature of 60 DEG C), the mixture is aged at the room temperature for 24 h, and a solution A is obtained; secondly, the silane coupling agent is added to the remaining absolute ethyl alcohol solution to be rapidly stirred for 2 h, fumed silica is added, andthe mixture is continuously stirred for 30 min, finally, perfluorinated silane is slowly dropwise added, the mixture is stirred intensely for 5 h, and a solution B is obtained; finally, the solutionA and the solution B are mixed and stirred for 2 h, a film-forming agent is added, the mixture is continuously stirred for 2 h, and the superhydrophobic nanomaterial is obtained. The preparation method has the advantages as follows: the superhydrophobic nanomaterial has stable and durable superhydrophobic performance, is non-corrosive, free from environmental pollution, low in cost and wide in application range and adopts a simple process.

The invention relates to massive and controllable preparation field of semiconductor type single-walled carbon nanotubes, specifically to a method for directly growing the semiconductor type single-walled carbon nanotube with floating catalyst and auxiliary oxygen. The method comprises the following steps of: taking ferrocene as precursor of the catalyst, taking right amount of sulphur powder as growth promoter, and taking hydrogen as a carrier gas; simultaneously introducing a carbon source gas and small amount of oxygen to grow the single-walled carbon nanotube, and etching the small-diameter and metallic single-walled carbon nanotube in situ; and finally, obtaining a sample in which the semiconductor type single-walled carbon nanotube is dominant, wherein content of the semiconductor type single-walled carbon nanotube is 90 wt%, and diameter distribution of the semiconductor type single-walled carbon nanotube is 1.4-1.8 nm. With the method, massive and directly controlled growth ofthe semiconductor type single-walled carbon nanotube with narrower diameter distribution is realized; and the method solves the problems, such as that the separation process of the existing chemical and physical methods seriously damages the intrinsic structure of the single-walled carbon nanotube and the process is complex, and sample amount is less, diameter distribution is wider and the diameter is smaller in the direct preparation technology, and the like.

The invention discloses a wireless intelligent video surveillance system based warning method. The wireless intelligent video surveillance system based warning method comprises the steps of adopting the wireless intelligent video surveillance system to selectively conduct anti-theft detection, abandoned object detection, intrusion detection, personal attach suffering detection, crowding degree detection, event counting, flame detection and smoke detection on an object to be monitored. By means of the wireless intelligent video surveillance system based warning method, the defects of complicated structure, small application range, high cost and the like in the prior art can be overcome so as to achieve the advantages of simple structure, large applications range and low cost.

The invention discloses a self-powered agricultural comprehensive information intelligent monitoring system. The self-powered agricultural comprehensive information intelligent monitoring system comprises a hollow cone steel pipe, a data collecting unit, a data transmission unit, a power supply unit and a data center, wherein the data collecting unit, the data transmission unit and the power supply unit are fixed and connected through the hollow cone steel pipe respectively, and the data center is used for processing and displaying the collected data of the data collecting unit; the data collecting unit and the data transmission unit are sequentially connected with the data center, and the power supply unit is respectively connected with the data collecting unit, the data transmission unit and the data center. The self-powered agricultural comprehensive information intelligent monitoring system can overcome the defects that the data transmission amount is small and the application range is small in the prior art, and has the advantages of being large in data transmission amount and wide in application range.

A device for measuring strap down inertia of gyroscope in small volume and open ring optical fiber type consists of three open ring optical fiber gyroscopes, accelerometer, signal collection module, data processing module, data transmission interface and mechanical framework .It is featured as forming mechanical framework by T form structure and base plate, setting X-axis gyroscope on base plate and setting Y-axis gyroscope and Z-axis gyroscope on T form structure, setting accelerometer on said framework and setting signal collection and data processing modules on T form structure .

The invention discloses an anti-condensation control method and an anti-condensation control device for a combined air conditioner, and the combined air conditioner. The method comprises the following steps: acquiring the wet-bulb temperature of an environment where the combined air conditioner is located under a refrigeration mode of the combined air conditioner; determining whether the wet-bulb temperature is lower than or equal to a preset dew-point temperature; and adjusting the opening degrees of an air valve and / or a water valve of the combined air conditioner when the wet-bulb temperature is lower than or equal to the dew-point temperature, so as to enable the current wet-bulb temperature of the environment after the adjustment to be higher than the dew-point temperature, and realize anti-condensation control for the combined air conditioner. The scheme of the invention is capable of overcoming the defects of high energy consumption, small application range, high possibility of environment pollution, and the like in the prior art, and realizing the beneficial effects of low energy consumption, large application range and low possibility of environment pollution.

The invention discloses a method for detecting a trace amount of oxytetracycline by utilizing a CdTe quantum dot fluorescent probe. According to the invention, CdTe quantum dots are taken as the fluorescent probe, and oxytetracycline and CdTe quantum dots are utilized to be combined to form a new composite system through electrostatic interaction to cause the quenching of fluorescent light of CdTe quantum dots, so that a method for detecting the trace amount of oxytetracycline is established. A favorable linear relation is formed by the quenching amount of fluorescent light of CdTe quantum dots and the concentration of gibberellin within the concentration range of 8*10<-9>-2*10<-7> mol / L, and the detection limit of the method is 2.72*10<-10> mol / L. According to the invention, defects of low sensitivity, long reaction time, poor stability and narrow application range during detecting in the prior art are overcome, the sensitivity and selectivity are better improved, and the detection to the low-concentration oxytetracycline is more convenient and faster.

The invention discloses an adjustable jitter measurement circuit based on a self-reference signal; an output end of a single-period collecting module is electrically connected with input ends of a first alternative data selector MUX1 and a second first alternative data selector MUX2; the output end of the first alternative data selector MUX1 is electrically connected with an input end of a first oscillating loop; the second alternative data selector MUX2 is electrically connected with the input end of a second oscillating loop; the output ends of the first oscillating loop and the second oscillating loop are both electrically connected with the input ends of phase discriminator; the output end of the phase discriminator is electrically connected with a reset signal generating module; and a counter is electrically connected with the second oscillating loop. The adjustable jitter measurement circuit based on self-reference signal, overcoming the disadvantages of low measurement accuracy, difficult correction, limited measurement scope, low resolution and low measurement speed in the prior art, has advantages of high measurement accuracy, convenient correction, wide measurement scope, high resolution and high measurement speed.

The invention discloses a plant essential oil chitosan nano microcapsule. The plant essential oil chitosan nano microcapsule comprises a wall material and a core material, wherein the wall material isprepared from chitosan and a cross-linking agent in an acetic acid water solution or an ionic liquid water solution through cross linking; the core material is prepared from plant essential oil and mannose erythritol ester. The plant essential oil chitosan nano microcapsule disclosed by the invention has better encapsulation efficiency and better particle diameter, the destruction to active components of essential oil can be reduced, the volatility of the essential oil is effectively reduced, the photo-thermal stability of the essential oil is increased, and the effect acting time of the essential oil is prolonged; liquid essential oil is stored in a solid form while the essential oil is not destroyed; a preparation process is safe, non-toxic and green; the application range of the plantessential oil is greatly expanded.

The invention discloses a bed-parallel drilling slot pressure relief permeability increase method which includes the steps: (1) performing construction on bed-parallel gas extraction drilling by the aid of a high-pressure hydraulic slotting device to form a drilled hole according to bed-parallel gas extraction drilling design requirements; (2) leading high-pressure water into the high-pressure hydraulic slotting device without withdrawing a drill to rotatably and circumferentially cut coal to form a disc-shaped slot; (3) withdrawing the drill after the disc-shaped slot is formed, and radiallycutting the coal without rotating a drill bit and a drill rod to form a radial slot; (4) repeating the step (2) and the step (3), and forming a plurality of disc-shaped slots and a plurality of radialslots in the same drilled hole; (5) repeating the step (1) to the step (4), and performing drilling and slotting on the other bed-parallel drilled holes. According to the method, horizontal and vertical stress of a coal layer is reduced, drilling gas extraction concentration and flow is improved, the bed-parallel drilling number of a working surface is decreased, and the method is simple and convenient to operate.

The invention belongs to the mobile communication technological field and discloses an array antenna-based target signal source detection method. The method includes the following steps that: the number and orientations of target signal sources are judged preliminarily though a beamforming technology, and an antenna coverage area is divided into a plurality of cells according to received signal power obtained in a beam rotation process; a beam is made to sequentially direct to the plurality of cells, and the spatial spectrum of signals in each of the cells is obtained through an MUSIC algorithm, and the number and orientations of target signal sources in each of the cells are determined; and the calculation results of the plurality of cells are summarized, and the exact number and preciseorientations of the target signal sources are obtained after comprehensive processing is carried out. With the array antenna-based target signal source detection method of the invention adopted, the problems of low spatial resolution and many limitations in application of target signal source orientation estimation in the prior art can be solved; and spatial resolution can be improved, and the number of signal sources that can be detected is not affected by the number of array antenna array elements.

The invention discloses an industrial robot clamp and further discloses an industrial robot adopting the industrial robot clamp as a tail end actuating mechanism. The industrial robot clamp comprisesa clamping part. The clamping part is in a ring shape and is formed by oppositely closing two semi-ring-shaped clamping arms; the industrial robot clamp further comprises a driving part for driving the clamping part to be opened and closed; a plurality of sliding cavities are circumferentially and evenly distributed in the clamping arm, and the bottoms of the sliding cavities are located on the inner circumferential wall of the clamping part and are made of elastic materials; and pistons capable of sliding in the radial direction of the clamping part are transversely arranged in the sliding cavities, each piston and the bottom of the corresponding sliding cavity form an airbag with airtightness, and the airbags are filled with air, and electromagnets are arranged in the pistons. The limitation that the clamping range of an existing industrial robot clamp is limited, and the existing industrial robot clamp has special purposes is overcome, the clamping range is wide, and applicability is high.

The invention discloses a system and an array for tracking solar energy linearly. In the invention, various solar energy optical mirrors of which the focuses are in a straight line are adopted. In a solar energy tracking process, the solar energy optical mirrors move on an axis of a straight focus line instead of an axis of the bottom line of the conventional solar energy optical mirror, and the focus line is kept still all the time or at rest relative to the ground. In the invention, the structural design that the focus line does not move is adopted, so a heat tube can be applied in heat transfer of the system; and meanwhile, other heavy solar energy-using equipment, such as solar energy photovoltaic generating equipment, a stirling generator and other kinds of large equipment, can be arranged on the focus line, so the solar energy tracing and utilization can be realized by a small drive force. The invention provides an array structure of the system to facilitate massive solar energy utilization, particularly the application of the solar energy in aspects of solar energy thermal power generation, solar energy heating, solar energy cooking, solar energy refrigeration and the like.

A bismuth sodium titanate thin film series has a formula of (1-X)(Bi0.5Na0.5)TiO3+XMTiO3, where x=0-0.6 and M is chosen from Ba, Pb, Sr and Ca, and is prepared by metal-organic solution depositing method. Its advantages are proper electric conductivity in ferroelectric region, wide sinter temp range, and high storage and thermoelectric properties.

The invention relates to a polyimide resin-based structure wave-absorbing material reinforced by nickel cobaltate-silicon carbide fiber multi-scale reinforcement and a preparation method thereof; the preparation method comprises: adding degummed dried silicon carbide fiber cloth in solution A to carry out hydrothermal reaction, taking out the silicon carbide fiber cloth after reacting, and annealing to obtain nickel cobaltate-silicon carbide fiber multi-scale reinforcement, wherein the solution A is made by adding cobalt nitrate, nickel nitrate and urea in water and stirring well; brushing polyamide acid solution evenly to the outer surface of the nickel cobaltate-silicon carbide fiber multi-scale reinforcement, and stacking neatly to obtain a preform; subjecting the preform to a multiple repeat process of vacuumizing, pressure holding, and relief, and performing mold pressing to obtain the polyimide resin-based structure wave-absorbing material reinforced by nickel cobaltate-silicon carbide fiber multi-scale reinforcement. Nickel cobaltate is grown on the surface of silicon carbide fiber, interfacial polarizing capacity and electrical conductivity of the composite are improved, and good wave-absorbing performance and mechanical properties are achieved.

The invention discloses a steel arch rib outer wrapped concrete construction method for a steel trussed arch bridge and relates to the technical field of building construction of steel trussed arch bridges. The construction method includes the steps that each steel arch rib section to be poured with concrete is provided with a hanging bracket system and a bottom formwork; after installation is finished, bottom board reinforcing steel bars are tied; each hanging bracket system is used for erecting a construction support and an operation platform, web reinforcing steel bars and a web formwork of a first ring construction section are installed, and the outer wrapped concrete is poured to the first ring construction section; after the concrete is poured, an inner cavity support and a platform are erected, a high construction support and an operation platform are connected, reinforcing steel bars and a formwork of a second ring construction section are installed, and the outer wrapped concrete is poured to the second ring construction section; and after the concrete is poured, outer wrapped concrete construction of the next steel arch rib section is started, and the operation is repeated till the concrete is poured to all the steel arch rib sections. By the adoption of the method, the construction difficulty is lowered, the application range is wide, construction efficiency is effectively improved, construction safety is guaranteed, and adaptability and economical efficiency are high.

The invention relates to a two-step latent fingerprint manifesting method based on nano-particles. The two-step latent fingerprint manifesting method based on nano-particles includes that firstly, combining zinc oxide or aluminum oxide nano-particles with micro substances at the fingerprint surface through a physical or chemical method to realize high-sensitivity fingerprint manifesting; secondly, using organic fluorescent dye coloring agent to adsorb the manifested fingerprint so as to realize the high-contrast fluorescence characteristic manifesting of the fingerprint. The two-step latent fingerprint manifesting method based on nano-particles has advantages of high sensitivity, strong associativity, background reflection interference resistance, multi-waveband fluorescence emitting and the like, and both the manifesting rate and sensitivity are higher than those of a powder manifesting method and a 502 glue fuming method.

An embodiment of the invention relates to the technical field of livestock and poultry breeding, and provides a disinfecting sprayer for epidemic prevention. The disinfecting sprayer comprises a flowguide cover, a fan, a liquid conveying tube and a nozzle; the flow guide cover comprises an air inlet end and an air outlet end; the sectional area of the air inlet end is larger than that of the airoutlet end; the fan is mounted at the air inlet end, and the nozzle is mounted at the air outlet end; the fan is used for blowing the external air into the flow guide cover to form a positive pressuredifference in the flow guide cover; the liquid conveying tube is used for conveying external disinfectant to the nozzle, and the disinfectant is sprayed out along with the air sprayed by the nozzle to form a disinfecting spray. The disinfecting sprayer for epidemic prevention provided by the invention has the advantages that atomization and spraying are integrated, the defects of small spraying range and low automation degree of manually-carried spraying devices are overcome, and the manpower is saved; no high-power water pump boosting is needed; the disinfecting sprayer is simple in structure, low in cost and energy consumption, concise, efficient, convenient to use, high in universality, capable of being applied to breeding organizations with various scales, high in adaptability, and favorable for popularization and application.

The invention discloses a peak voltage digital display meter and relates to a measuring apparatus for a voltage pulse peak value. The peak voltage digital display meter mainly consists of an automatic range switching circuit, a peak voltage collecting and retaining circuit, an A / D (Analog-to-Digital) conversion circuit and a main control circuit, wherein the automatic range switching circuit mainly consists of a CD4052 double four-in-one multi-path switch I, a CD4052 double four-in-one multi-path switch II, an OP07 operational amplifier and a divider resistor; the peak voltage collecting and retaining circuit mainly consists of an LF398 sampling holder and an LM311 voltage comparator; the A / D conversion circuit is provided with a 12-bit AD574 chip; the main control circuit comprises an input keyboard, a master processing chip and a display output module; the master processing chip is provided with an 89C52 single chip computer; and the display output module comprises a digital display circuit and a digital display tube. The measuring range of the total peak voltage of the peak voltage digital display meter is 1 mv-1000 V, and the measuring accuracy is high.

The invention provides a two-step phase extraction method and a system based on inclined phase shift error correction and a storage medium. The method comprises the following steps of collecting two random interference diagrams; through high pass filtering, removing the background light intensity of the two random interference diagrams; carrying out normalization processing on the two filtered random interference diagrams and removing the modulation amplitude disturbances of the two random interference diagrams; for the two random interference diagrams after the normalization processing, through a nonlinear error minimization, solving a random inclination phase shift error parameter between the two random interference diagrams; and based on the random inclination phase shift error parameter between the two random interference diagrams, extracting a phase. In the invention, during a phase shift interference measurement phase extraction process, influences of a random inclination phase shift error caused by external environment vibration, the background light intensity caused by air disturbance and an unstable light source, the modulation amplitude disturbance and the like are overcome. Besides, by using the method of the invention, the two interference diagrams only need to be collected, a phase extraction speed is fast and precision is high.

The invention provides an average angle of attack adjustment mechanism of a continuous transonic wind tunnel airfoil profile dynamic experiment. A first oscillating shaft is located at one end of a wind tunnel rotating window, and a second oscillating shaft and a third oscillating shaft are located at the other end of the wind tunnel rotating window. An average angle of attack adjustment disk is located on the second oscillating shaft, and an oscillating shaft adjustment disk is located on the third oscillating shaft. The average angle of attack adjustment mechanism provided by the invention overcomes the errors of an indirect adjustment mode of the traditional mechanism in machining and assembly processes, and the verticality of the axis of the oscillating shaft and a side wall of a windtunnel, a gap between the oscillating shaft and a rotating window through hole and the jump between an end face of a rotating shaft and the rotating window can be controlled more accurately in the installation of the oscillating shaft, thereby effectively reducing the friction loss of the oscillating shaft and improving the duality of the airfoil profile dynamic experiment; and the average angle of attack is adjusted by rotating the relative position of a flange plate of the average angle of attack, and the problems of small adjustment range of the traditional mechanism and few coverage angleswithin the adjustment range are overcome.