33results about How to "Low technical difficulty" patented technology

The invention discloses a flame surface / progress variable model-based supersonic turbulent combustion flow calculation method, and belongs to the field of computational fluid dynamics (CFD). The method comprises the steps of establishing a flame surface database; performing RANS solving by using the flame surface database; and building a compressible scale model of a progress variable source item. In view of a flame surface / progress variable turbulent combustion model with self-ignition and flameout phenomena, a novel compressible scale model with a definite physical meaning is built for the progress variable source item, so that a corrected flame surface / progress variable model can accurately describe self-ignition and flameout processes; and the high Mach number effect of flow is effectively considered, so that the simulation precision of supersonic turbulent combustion flow is greatly improved. The technology is low in realization difficulty, can be used as compressible correction, and only needs to be added as a sub-program; and an original program is slightly modified during CFD program coupling calculation.

A rectifier transformer with self-couple compensation and shielding harmonic is disclosed. The self-couple tap is led out from the secondary winding in the supply transformer, this tap divides the secondary winding into two stages: the analogous auto-transformer common winding and series winding. Both of them are coupled closely, the secondary windings of the two stages and primary winding are arranged with one center on the iron core cylinder, specially the common winding is arranged between the primary winding and series winding, its equivalence impedance value is zero. The both ends of common winding connect to the bypass of external filter capacitor inductance. The invention can take reactive compensation for inductive current at user's power frequency. Utilize the Ampere-turn balancing action of two windings divided by tap at relevant harmonic frequency to neutralize the harmonic current, thereby leads the harmonic current to return to load nearby through series winding and prevents the harmonic current from crossing the air gap into primary power network. It also prevents the harmonic magnetic flux from damaging to the transformer.

The invention discloses a compressible wall function calculation method considering a boundary layer combustion heat release effect, and belongs to the field of computational fluid mechanics. A velocity wall law and a temperature wall law under a combustion chemical reaction condition are proposed through theoretical derivation; based on this, a unified wall function calculation method capable of being compatible with compressible turbulent boundary layers with / without a chemical reaction simultaneously is established; and a detailed process coupled with a CFD program for solving is designed. The calculation method is low in technical realization difficulty and is suitable for the condition with or without the boundary layer combustion heat release effect. The numerical simulation efficiency of frictional resistance / heat flow of a flow passage in a scramjet engine can be greatly improved, so that the calculation cycle is greatly shortened.

The invention relates to a plate-fin type heat exchanger with fluid being flowing back and forth in a channel. Cold channels and hot channels inside the plate-fin type heat exchanger are arranged in a layered and crossed manner and are separated by channel clapboards, and heat transfer fins are arranged in the channels; one or more horizontal adjusting battens which are horizontally arranged are arranged in each channel of the heat exchanger to separate the channel into a plurality of horizontal flow passes in the height direction; the horizontal flow passes are connected in series end to end by vertical flow passes in each channel; fluid participating in heat exchanger flows through each horizontal flow pass and each vertical flow pass in sequence to form repeated back-and-forth flow in each channel; through setting the widths of each horizontal flow pass and each vertical flow pass in each channel, the plate-fin type heat exchanger is easy to enable the fluid in each channel to keep in a reasonable range; and even if the fluid is subjected to phase change in the heat exchanger to cause that the volume and the flow rate of an inlet are very remarkably different from those of an outlet, and the reasonable flow rate distribution can be achieved by using the plate-fin type heat exchanger. The plate-fin type heat exchanger has the advantages of easily realizing flow rate regulation and distribution of the fluid, improving the efficiency of the heat changer, saving the occupied space and remarkably lowering the manufacturing cost.

The invention provides a road congestion monitoring method based on mobile phone communication big data. The method comprises the following steps of: S1, carrying out real-time communication data processing of a mobile phone, and obtaining a 5-minute position snapshot graph of a user, S2, constructing a road network model, and mapping cellular communication base stations and roads to obtain a basestation road point matching table, S3, user path trajectory fitting and road section speed calculation, and S4, visualizing the road congestion, and monitoring the road congestion. Fitting of the cellular base station and the road is realized; based on the mobile phone communication big data and according to a kafka + hadoop + redis + spark streaming big data real-time stream processing technology, all-weather all-road-section monitoring of the road congestion condition is achieved, display and automatic early warning are carried out with the assistance of a visual interface, query and analysis of historical conditions can be achieved, and compared with a traditional manual inspection or fixed-point equipment monitoring mode, the cost and the technical implementation difficulty are greatly reduced.

The roller type linear slide rail consists of mainly slide rail, block body, roller module, circulating module, end cap and other parts combined together. The present invention features the circulating module comprising two semi-circulating modules combined in special angle, the semi-circulating module comprising two U-shaped semi-circulating sheets combined together, the semi-circulating sheet comprising integrally formed turning block, support strip and reflux semi pipe, and two rows of roller modules in X-shaped cross turning and rolling in the turning part. Therefore, the present invention may be assembled without need of more fittings and in short time, and has easy forming process and low cost.

The invention relates to an extreme ultraviolet-ray space remote communication system. The extreme ultraviolet-ray space remote communication system comprises an extreme ultraviolet pulse generation modulator, an extreme ultraviolet collimator, an extreme ultraviolet focuser and an extreme ultraviolet detection demodulator; the extreme ultraviolet pulse generation modulator is arranged on the focal point of the extreme collimator and used for modulating a to-be-transmitted digital signal, and the signal is output in an extreme pulse signal form; the modulated extreme pulse signal is transmitted in an orientation manner after being collimated by the extreme ultraviolet collimator; the extreme ultraviolet focuser is used for receiving the extreme ultraviolet pulse signal and focusing the extreme ultraviolet pulse signal, and the extreme ultraviolet detection demodulator which is arranged on the focal point of the extreme ultraviolet focuser is used for demodulating the extreme ultraviolet pulse signal to obtain the to-be-transmitted digital signal.

The invention provides a reinforced concrete member service life prediction method based on chloride ion concentration monitoring, and the method comprises the following steps: obtaining chloride ionconcentrations monitored by a chloride ion concentration sensor with a preset burying depth in a measured reinforced concrete member at different monitoring times, and obtaining chloride ion concentration time series data; based on the obtained chloride ion concentration time series data, calculating the critical service life of the measured reinforced concrete member by utilizing a Fick second law; and obtaining the service life of the tested reinforced concrete member, and obtaining the remaining service life of the tested reinforced concrete member based on the obtained critical service life and the obtained service life. The invention aims to overcome the defects of the existing reinforced concrete member service life prediction method based on chloride ion concentration monitoring.

The invention discloses a method and system for detecting the concentration of optical-fiber methane gas on the basis of oblique-wave modulation. The method comprises the following steps of: with oblique-wave modulation signals as driving current of a light source, respectively obtaining a relation of change of the wavelength and the intensity of light signals emitted from the light source with the modulation signals; according to the beer-lambert law, obtaining light-intensity signals after absorption of the methane gas; carrying out differential processing on the light-intensity signals, thus obtaining processed signals; judging a time point t1 when the wavelength of the light source starts entering a methane-gas absorption line and a time point t2 when the wavelength of the light source is completely equal to the central wavelength of the absorption line; carrying out integration in the range of t1 to t2 on the integrated signals; and obtaining the concentration of the methane gas. The method and system disclosed by the invention have the beneficial effects that the signal algorithm analysis only relates to wavelength modulation and differential demodulation, so that the complex algorithms such as Fourier transformation and harmonic analysis are avoided, the signal processing time is saved and the response speed of detection is improved.

The invention discloses auxiliary equipment for installation of an air conditioner outdoor unit. The auxiliary equipment comprises an erector shell, wherein an adjusting space with openings in three sides is formed in the erector shell; a supporting plate is arranged at one side of the erector shell; two clamping mechanisms are installed at the bottom of the supporting plate; and two clamping mechanisms are installed on the side face of the supporting plate. The auxiliary equipment is an auxiliary tool in the installation process of the air conditioner outdoor unit, an air conditioner copper pipe can be straightened, attached to an outer wall and corrected, follow-up installation of an air conditioner outdoor unit body is facilitated, the auxiliary equipment is of a pure mechanical structure and is manually controlled, the overall structure is very stable, adjustment of the air conditioner copper pipe is controlled by workers, and the effect is high; and the outdoor air conditioner copper pipe can be adjusted only by being fixed to a window and being operated indoors, the auxiliary equipment is very safe, the copper pipe can be intermittently straightened, attached and knocked to be corrected only by rotating a handle, it is guaranteed that the air conditioner copper pipe is accurately adjusted, meanwhile, operation is very simple, and the use technology difficulty is low.

The invention discloses a vehicle transmission system anti-theft control method and device, equipment and a storage medium. The method comprises the steps that after a vehicle is powered on, obtaining an anti-theft algorithm, and the anti-theft algorithm carries verification information; performing I-level anti-theft verification according to verification information carried by the anti-theft algorithm; if verification is passed, performing gear shifting according to the gear shifting instruction of the driver in the vehicle; and when an intelligent driving instruction is received, performing II-level anti-theft verification, and a gear shifting instruction of a driver in the vehicle is not responded. By means of the method, two-stage transmission system theft prevention under the two working conditions of manned driving and unmanned driving can be achieved, the two-stage transmission system theft prevention system is provided with an in-vehicle anti-theft alarm system and an out-vehicle anti-theft alarm system and has the vehicle end network connection function, a vehicle owner can directly intervene in operation gear shifting through a mobile phone end, and the vehicle is prevented from being stolen. Technical implementation difficulty can be reduced while the requirements of vehicle anti-theft laws and regulations are met, the driving safety coefficient is increased, the whole vehicle anti-theft effect is remarkable, the whole vehicle anti-theft process is simplified, and cost is greatly reduced.

The present disclosure relates to an eyedrop applicable to limbal stem cell deficiency and a preparation method, wherein each liter of the eyedrop includes the following components: 1 to 40 mg of human adipose-derived stem cell exosomes, excipients: 0.5 to 2 g of sodium hyaluronate, 0.5 to 3 g of vitamin B6 and 0.05 to 0.3 g of benzalkonium chloride, and the balance of medical normal saline, a pH of the eyedrop is 6.5 to 7.5; and the eyedrop of the present disclosure is effective in treating limbal stem cell deficiency.

The invention aims to provide a method and equipment for determining an evaluation score of an audio and video call. The method comprises the following steps: acquiring numerical information corresponding to one or more predetermined call parameter types of a first user in a target audio and video call; for each predetermined call parameter type, according to an interval distribution model corresponding to the predetermined call parameter type, determining a distribution interval corresponding to the numerical information corresponding to the predetermined call parameter type in the interval distribution model, determining the score information corresponding to the distribution interval as the score information corresponding to the predetermined call parameter type in the target audio and video call; and determining evaluation score information of the first user in the target audio and video call according to the score information corresponding to each predetermined call parameter type in the target audio and video call. Hardware investment and manpower investment required by the method are extremely low, the technical implementation difficulty is low, and the method has high operability in industrial practice.

The invention discloses a high signal-to-noise ratio terahertz device based on optical ruler sensing and a signal sampling method. In the high signal-to-noise ratio terahertz device, an optical fiberfemtosecond laser is connected with a THz emitter through a THz emitter tail fiber, and is connected with a delay line inlet optical fiber flange coupler through an optical fiber jumper; a delay lineoutlet optical fiber flange coupler is connected with a THz receiver through a THz receiver tail fiber; a high-speed data acquisition card is respectively connected with an optical ruler controller, acontrol computer and the THz receiver through data lead wires; the optical ruler controller is a controller for performing sensing control and position display on an optical ruler; and the high-speeddata acquisition card adopts a high-speed multi-path synchronous acquisition data card and is used for acquiring output signals of the THz receiver and acquiring output signals of the optical ruler controller at the same time. The high signal-to-noise ratio terahertz device has the advantages of rapidness, effectiveness, high flexibility, low technical implementation difficulty, excellent workingperformance and the like, and the performance index of the THz spectrometer can be greatly improved.

The invention discloses a synonym mining method and device, a storage medium and computer equipment, and relates to the field of big data analysis. The method comprises the steps of obtaining a targetstatement, searching the target statement for through a full-text search engine, obtaining a first similar statement of the target statement, and the target statement and the first similar statementcomprise at least one same word; creating a similar sentence pair according to the target sentence and the first similar sentence; performing similarity scoring on the similar sentence pairs, obtaining synonym sentence pairs according to the similarity scores, and performing word alignment extraction on the synonym sentence pairs to obtain synonym pairs; and inputting the synonym pairs and the target statement into the full-text search engine for iterative search and iterative extraction to obtain a plurality of synonym sentence pairs and a plurality of synonym pairs. According to the method,the mining quantity and mining quality of synonyms and synonym sentences can be remarkably improved, and the synonym mining limitation and technical implementation difficulty are reduced.

The invention discloses a guidepost navigation method and system based on shutter glasses. The method comprises the following steps: acquiring a visible light signal emitted from an LED (Light Emitting Diode) road indicator, wherein the visible light signal comprises multiple pieces of different navigation information; according to indication information corresponding to the current position of avehicle in a navigation path, determining at least one piece of navigation information from the multiple pieces of different navigation information as current navigation information; and taking the current navigation information as display information of the shutter glasses. According to the guidepost navigation method and system based on the shutter glasses, useful navigation information can be obtained in time, unnecessary navigation information is filtered, and therefore, navigation information obtained by the user is more accurate.

The invention relates to a universal-type centralized management platform with high fault tolerance, and the management platform comprises centralized control platform hardware equipment and a built-in centralized control platform operating system. The management platform is characterized in that the centralized control platform operating system is provided with virtual software; the virtual software is used for virtual configuration of a plurality of virtual machines, and each virtual machine is provided with a virtual machine operating system to form a multi-virtual-machine structure; each virtual machine is corresponding to one type of PLC SCADA software, and a PLC SCADA project is imported through the PLC SCADA software, thereby forming independent virtual machine management structures; each virtual machine management structure is nested in the centralized control platform operating system, and independently exists and works in the centralized control platform hardware equipment and the built-in centralized control platform operating system; each virtual machine management structure is compatible with various types of advanced operating systems, thereby forming the universal-type centralized management platform with high fault tolerance. The platform is simple in structure, is convenient to set, use and maintain, and is low in cost.

The invention discloses a method for processing ophthalmic OCT images, which includes: selecting the common part OCT image of any group of ophthalmic OCT images as a standard ophthalmic OCT image, and combining the remaining at least one group of common part OCT images of ophthalmic OCT images and The standard ophthalmic OCT images are matched one by one to obtain the corresponding rotation and translation; according to the optical path difference of the spatial position corresponding to the OCT image of each eye part of each group of ophthalmic OCT images, they are spliced ​​into a deep The deep first OCT image; the first OCT image is processed to obtain the second OCT image; keep the standard ophthalmic OCT image still, and select the corresponding part of the second OCT image from the OCT image of other human eye parts, according to the OCT of each part The optical path difference of the corresponding spatial position of the image is spliced ​​to obtain an ophthalmic OCT image containing multiple human eye parts. The method reduces the complexity of ophthalmic OCT equipment and saves cost.

An auxiliary equipment for installation of an air conditioner external unit according to the present invention comprises an installer shell, an adjustment space with openings on three sides is provided inside the installer shell, a support plate is provided on one side of the installer shell, and a support plate is installed at the bottom of the support plate Two clamping mechanisms, two clamping mechanisms are installed on the side of the support plate, the invention is an auxiliary tool in the installation process of the air conditioner external unit, which can straighten the copper pipe of the air conditioner, stick to the outer wall and correct it, It is convenient for the follow-up installation of the main body of the air conditioner, and the invention is a purely mechanical structure, which is carried out by manual control. The overall structure is very stable. The adjustment of the copper pipe of the air conditioner is controlled by the worker, and the effect is high. The invention only needs to be fixed on the window. It is very safe to adjust the copper pipe of the outdoor air conditioner indoors, and only need to turn the handle to intermittently straighten the copper pipe and tap the correction steps to ensure that the copper pipe of the air conditioner is adjusted accurately. The operation is also very simple, and the technical difficulty is relatively low.

The invention discloses millimeter wave cell radiation experimental apparatus assembled with a planar choke ring. The millimeter wave cell radiation experimental apparatus comprises a radiator, a plane bracket and a cell sample; the radiator consists of a solid-state source and an aperture antenna and is located below the plane bracket; the cell sample is placed on the plane bracket and is coaxially arranged with the radiator in the vertical direction; the millimeter wave cell radiation experimental apparatus further comprises the planar choke ring, a lifting sliding saddle, a high-precision three-dimensional sliding table and an industrial microscope; the planar choke ring is fixed to the lower surface of the plane bracket and is located between the radiator and the cell sample; the plane bracket is installed on the lifting saddle; the high-precision three-dimensional sliding table bears the radiator; the industrial microscope is arranged on the uppermost portion of the apparatus; the planar choke ring includes two layers of metal plates; and an upper elliptical hole and a lower elliptical hole are formed in the center of the upper metal plate and the center of the lower metal plate respectively to form a stepped structure. The planar choke ring of the millimeter wave cell radiation experimental apparatus can effectively reduce radiation nonuniformity of a cell experiment and improve radiation efficiency, and has good adaptability to mechanical manufacturing tolerance, installation deviation, frequency drift and electromagnetic parameters of the cell sample.

The invention discloses a flame surface / progress variable model-based supersonic turbulent combustion flow calculation method, and belongs to the field of computational fluid dynamics (CFD). The method comprises the steps of establishing a flame surface database; performing RANS solving by using the flame surface database; and building a compressible scale model of a progress variable source item. In view of a flame surface / progress variable turbulent combustion model with self-ignition and flameout phenomena, a novel compressible scale model with a definite physical meaning is built for the progress variable source item, so that a corrected flame surface / progress variable model can accurately describe self-ignition and flameout processes; and the high Mach number effect of flow is effectively considered, so that the simulation precision of supersonic turbulent combustion flow is greatly improved. The technology is low in realization difficulty, can be used as compressible correction, and only needs to be added as a sub-program; and an original program is slightly modified during CFD program coupling calculation.

The invention discloses an optical fiber methane gas concentration detection method and system based on ramp wave modulation, which includes: using a ramp wave modulation signal as the driving current of a light source, respectively obtaining the relationship between the wavelength and intensity of the optical signal emitted by the light source and the modulation signal; According to Beer-Lambert's law, the light intensity signal after methane gas absorption is obtained; the light intensity signal is differentially processed to obtain the processed signal; the time point t1 and the light source wavelength at which the light source wavelength begins to enter the methane gas absorption line are judged The time point t2 is completely equal to the center wavelength of the absorption line; the differentiated signal is integrated from time t1 to time t2; the concentration of methane gas is obtained. The invention has beneficial effects: only wavelength modulation and differential demodulation are involved in signal algorithm analysis, avoiding the use of complex algorithms such as Fourier transform and harmonic analysis, saving signal processing time, and improving detection response speed.

The invention discloses a safety identification system for standardizing driving behaviors. A camera is fixed in a leg space of a driver in front of a driving seat, the acquisition direction of the camera faces a pedal area, the camera outputs an image signal to an image processor, and an image processor is connected with an ECU (Electronic Control Unit) and is communicated with the ECU. Accordingto the method, the requirement of laws and regulations for shoe wearing of a driver is converted into a controllable and implementable technical method, the investment cost is low, the technical implementation difficulty is low, the implementability is high, and the social benefits are high.

The invention provides a multi-aircraft configuration terminal capable of being quickly accessed to a Big Dipper constellation phased-array inter-satellite link, which aims to provide a configuration terminal of small implementation technical difficulty and capable of being quickly accessed to multiple aircrafts. According to the technical scheme of the invention, an intermediate-frequency signals is sent to a dispreading unit by a signal channel unit. After the dispreading processing step, two parallel signals are respectively sent to a signal detection unit and a demodulation processing unit. The signal detection unit obtains a synchronization pulse signal consistent with a forward transmit signal of a Big Dipper II type constellation phased-array inter-satellite link in timing sequence. The demodulation processing unit outputs demodulated data and then sends the demodulated data to an information processing unit so as to distinguish a plurality of aircraft targets from each other. According to the synchronization pulse signal and the identification location information of the aircrafts, a signal generating unit generates an intermediate-frequency signal consistent with a returning reception signal of the Big Dipper II type constellation phased-array inter-satellite link in timing sequence and then sends the intermediate-frequency signal to the signal channel unit. In this way, the intermediate-frequency signal is converted into a radio frequency signal. The communication link between Big Dipper II type constellations is established.

The invention discloses a reverberation circuit, a control method of the reverberation circuit, a chip adopting the reverberation circuit and a device adopting the chip. The reverberation circuit is asimpler reverberation circuit, and the high-quality reverberation effect of adjustable reverberation orders and reverberation depth can be realized.

Provided in the present invention is a solid-surface reflector for microwave reflection, the reflector comprising: a reflective surface provided on a panel in the front of the solid-surface reflector; a first grating exhibiting a supporting structure that projects from one side of the reflective surface and separates the reflective surface to form at least one grating unit; and at least one actuator fixed onto the first grating to control the geometry of the reflective surface. The invention can adjust and control the profile accuracy of the reflective surface by using the described technical solution. On the basis of the existing molding process and processing accuracy, and by combining the described technical solution, the invention can improve the profile accuracy of the reflective surface of the solid-face reflector. Meanwhile, the invention can save manufacturing costs, and reduce process complexity and technical implementation difficulty.