53results about How to "Meet precise needs" patented technology

The invention discloses a turbofan engine self-adaptive component level simulation model construction method, which comprises the following steps: step A, obtaining parameters of each working sectionof a turbofan engine, establishing a nonlinear component level dynamic universal model of the turbofan engine in a state above a slow train; step B, designing a volume tracking filter and estimating an unmeasurable performance feature parameter of an air channel component of the turbofan engine in the nonlinear component level dynamic universal model obtained in the step 1, wherein the air channelcomponent comprises a fan, a gas compressor, a high pressure turbine and a low pressure turbine; step C, using the performance feature parameter estimated in the step B to automatically update the flow and efficiency characteristic diagram of the air channel component, using the adjusted air channel component characteristic parameters for calculation of component aerothermodynamic parameters, andestablishing a self-adaptive component level simulation model in a state above the slow train. The turbofan engine self-adaptive component level simulation model construction method in the inventionsignificantly improves the precision of the nonlinear component level engine individual model in the state above the slow train.

A method for construct adaptive component level simulation model of variable cycle engine Based on the general nonlinear component-level dynamic model of variable cycle engines, an adaptive extended Kalman filter is proposed, After estimating the unmeasurable performance characteristic parameters of variable cycle engine components, The flow rate and efficiency charts of the components are updatedautomatically by using the estimated characteristic parameters, and the adjusted characteristic parameters of the components are used to calculate the aerodynamic and thermodynamic parameters of thecomponents, and the adaptive component-level simulation model of the variable cycle engine is established for the conditions above the slow state. The invention has strong adaptability to model mismatch caused by engine individual difference and performance degeneration, The accuracy of the nonlinear individual model of variable cycle engine is improved significantly, and the manual adjustment ofthe characteristics of engine air circuit components by experience is reduced, which leads to the enormous workload caused by model matching, and provides the model basis for the control and health management theory of variable cycle engine.

The invention provides a method and device for generating a simulation clock. By rotating a second hand picture for a first preset angle every first preset time, rotating a minute hand picture for a second preset angle every second preset time, rotating a hour hand picture for a third preset angle every third preset time, overlying the current second hand picture, minute hand picture and hour hand picture with a background base plate picture of the clock every shortest preset time and expressing the current time by using a combined picture obtained by overlying, the simulation clock is successfully realized by using 4 pictures, the resource consumption is lowered, and meanwhile the running speed of the simulation clock is increased.

The invention relates to an LED light source stability detector based on PLC control, which comprises a box body, a silicon photoelectric sensor, a conditioning circuit, a power source, an A/D converter, a connecting cable, a D/A converter, a PLC, seven segments of nixie tubes, a driving circuit and an LED light source, wherein the silicon photoelectric sensor is arranged on the box body, the silicon photoelectric sensor is connected with the conditioning circuit via conductors, the conditioning circuit is connected with the A/D converter, the electric current of the LED is regulated via detecting and analyzing the change of illumination intensity so as to realize the stability of illumination intensity, and the effectiveness of the experimental result is intuitively analyzed and judged and can be directly fed back and controlled via saving and displaying the experimental result. The invention can display the intensity change of the light source in a graphical form, and carries out real-time operation according to the change of illumination intensity, and the device has simple structure and is easy to control.

The invention discloses a method for drilling a high-precision large-aperture hole in a printed board. When the diameter of the large-aperture hole is larger than and equal to 3.0 millimeters and is smaller than and equal to 6.5 millimeters, a straight drilling method is adopted. When the diameter of the large-aperture hole is larger than 6.5 millimeters, a counterbore drilling method is adopted. The straight drilling method includes the steps of firstly drilling three first pilot holes on three 120-degree-angle radiuses of the large-aperture hole to be drilled, and then drilling the large-aperture hole with the required diameter by using a drill bit with the center of the large-aperture hole to be drilled as the circle center, wherein the centers of the three first pilot holes coincide with the midpoints of the radiuses where the three first pilot holes are located on respectively. The counterbore drilling method includes the steps of firstly drilling a second pilot hole in the center of the large-aperture hole to be drilled, then drilling a plurality of counterbores between the periphery of the large-aperture hole to be drilled and the second pilot hole, and finally obtaining the large-aperture hole. According to the method for drilling the high-precision large-aperture hole in the printed board, the different drilling methods are adopted according to the aperture range of the large-aperture hole to be drilled, so the drilling accuracy is greatly improved, the requirements of the printed boards for the drilling accuracy are met, and the quality of the printed boards is promoted.

The invention discloses a method for machining a golden finger. The golden finger is manufactured in the mode that CCD locating and laser cutting are combined. The laser is stable in spots and adjustable in size. Therefore, the size of spots of the laser can be adjusted according to requirements to meet the requirement for accuracy of the golden finger, loss, caused by continuous conducting of the machining process, of the laser can not be generated, the size of the spots can not be changed, and the accuracy of the golden finger can be stable. Besides, through CCD locating, a laser device can be accurately controlled to cut according to graphs of the golden finger of a machining file, a laser cutting route is prevented from offsetting, and therefore the yield of golden finger products is improved.

The invention discloses a convolutional neural network reasoning accelerator and an acceleration method, and belongs to the field of hardware implementation of an artificial intelligence algorithm. Aiming at the problems of high power consumption, poor configurability, low calculation precision and the like in the prior art, the invention provides the convolutional neural network reasoning accelerator and an acceleration method. The accelerator comprises a main control module and an address generation module. The system comprises an SRAM storage module, a data input module, a calculation engine module and a result output module, wherein parallel computing units in the computing engine module are arranged independently; on the basis of limited computing resources and storage resources, theperformance advantage of high parallelism is achieved, the parallel computing units have fixed-point interception and turn-off functions, the parallelism and the computing precision of the acceleratorare improved, and the use power consumption is reduced.

The invention discloses a high-stability short-radius deflecting drilling tool which comprises a drill bit, a guide short section and a self-resetting flexible drilling rod, a driving connector is arranged at the tail end of the self-resetting flexible drilling rod, and the self-resetting flexible drilling rod is driven by a rotary driving power device through the driving connector so as to obtain rotary drilling power of short-radius rotary directional drilling. The front end of the self-resetting flexible drill rod is fixedly connected with the rear end of the guiding short section, the self-resetting flexible drill rod can transmit bit pressure and torque to the guiding short section in a steerable mode, and a drill bit is fixedly arranged at the front end of the guiding short section. According to the device, rigid transmission of bit pressure torque can be achieved, meanwhile, high-flexibility bending can be easily achieved, and a guiding tool can achieve guiding with extremely low guiding force; the engineering feasibility and practical value of the short-radius directional drilling technology on thin layer development, remaining oil potential tapping, multi-layer oil and gas commingling production, coal bed gas development and other kinds of mineral development are improved.

The invention relates to the technical field of nuclear fuel storage equipment, in particular to a spent fuel storage grillwork square tube welding tool. According to the technical scheme, the spent fuel storage grillwork square tube welding tool comprises an outer clamping mechanism and a lining mechanism. The outer clamping mechanism comprises a clamping base provided with a fixing groove, wherein an opening of the fixing groove is detachably connected with pressing plates. The lining mechanism comprises a plurality of short base plates, a long base plate and a driving mandrel, wherein the short base plates and the long base plate are evenly distributed in the circumferential direction of the driving mandrel, the long base plate is driven to extend in the length direction of the mandrel,and the plurality of sets of short base plates are arranged in the length direction of the driving mandrel. Four driving assemblies are evenly distributed on the circumference of the driving mandreland used for driving the base plates to move in the radial direction of the driving mandrel. Dimension precision control and welding process deformation control of welded square pipes can be achieved,the technical problem that the positioning precision and welding deformation are difficult to control in the manufacturing process of the thin-wall long and thin square pipes is solved, and the manufacturing precision of the square pipes can be guaranteed.

The invention discloses a novel magnetic Hall liquid level sensor. The sensor comprises a shell body and a PCB which is arranged in the shell body and matched with the shell body, wherein a floater is arranged on the shell of the shell body, and a magnet is arranged in the floater; the sensor further comprises a control module, and the control module comprises an MCU, an A/D conversion module, a D/A conversion module, a temperature detection module used for temperature detection and a signal output interface module, wherein the A/D conversion module, the D/A conversion module, the temperature detection module and the signal output interface module are connected with the MCU separately; a plurality of Hall elements are arranged on the PCB in the lengthwise direction in sequence, an output pin of each Hall element is connected with a resistor R, and the resistors R are connected with each another in series in sequence. The sensor has the advantages of high resolution and high precision, and can completely meet the demands of a customer for the precision of the liquid level sensor; output liquid level signals vary linearly, and data processing is easy; the signal number can be cut according to different lengths, so that the efficiency of post data reduction is greatly improved.

The invention discloses a driving behavior analysis method, apparatus and system. The method comprises the steps of obtaining driving behavior data of a vehicle in a preset first duration and drivingmileage of the vehicle in the first duration; processing the driving behavior data in the first duration to obtain an occurrence frequency of each driving behavior in preset mileage; and inputting theobtained occurrence frequency of each driving behavior in the preset mileage to a trained driving behavior analysis model, calculating a collision occurrence probability of the vehicle by adopting adriving behavior analysis model and performing output, wherein input parameters of the driving behavior analysis model include the driving behaviors, each driving behavior has a first mapping relationship with the collision occurrence probability of the vehicle, and the corresponding weight, in the first mapping relationship, of each driving behavior in the driving behavior analysis model is obtained by training. By adopting the scheme, the driving behavior analysis accuracy and the driving safety can be improved.

The embodiment of the invention provides a data query filter method and a corresponding device, which relates to the field of data query and can provide a precise number of business records or simultaneously display context information of a line when data information of the line which is matched with input characters is displayed for further meeting user requirements. The business-based query filter method comprises the following steps: receiving a request for querying business data, wherein the query request contains a preset pipeline filter keywords, and the preset pipeline filter keywords can indicate and display the number of business data records to be queried; using the business data to be queried to format a display template which is preset, wherein one piece of the business data is used for formatting the display template which is preset once; and making statistics on the number of times of formatting the display template which is preset and outputting the number of times. The embodiment of the invention is applied to data query of equipment.

The invention discloses a nut machining method. The nut machining method includes the steps of providing a nut, wherein the nut is provided with an inner surface extending along a direction, and the inner surface is provided with a flat portion and a threaded portion; grinding the flat portion by a flat grinder; grinding the threaded portion by a forming grinder; rotating a super polishing part along the direction to extend into the inner side of the nut so as to grind the threaded portion. The nut machining method can enable the machined threaded portion to be higher in precision.

The invention discloses a bearing series connection device and an application method. The bearing series connection device comprises a base; a mandrel mounting hole is arranged on the base; a mandrelis arranged on the base; the bottom end of the mandrel is inserted into the mandrel mounting hole; a pump shaft fit cavity matched with a pump shaft is arranged in the mandrel; a first shoulder is arranged on the periphery of the lower part of the mandrel; the lower end surface of the first shoulder is attached to the upper end surface of the base; a cushion block is arranged above the first shoulder; the cushion block is arranged on the mandrel above the first shoulder in a sleeving mode; a spring is arranged between the cushion block and the first shoulder; a clamp is arranged outside the cushion block in a sleeving mode and fixed on the base; a locking mechanism for fixing an outer ring of a lowermost bearing is arranged among the base, the clamp and the cushion block; a first bearing is firstly assembled, and the outer ring of the first bearing is fixed and then connected with other bearings in series; the use is simple; when the bearings are connected in series, the outer ring ofthe lowermost bearing is not staggered; and the serial assembly of two or more bearings is realized, and the assembly quality is good.

The invention discloses a topdressing-type eucalyptus special fertilizer and a preparation method thereof. The special fertilizer contains the following effective components, and the a mass ratio of Nto P2O5 to K2O to Cao to MgO to Cu to Zn to Fe to Mn to B to humic acid to chitosan oligosaccharide to 5-aminolevulinic acid to beauveria bassiana to bacillus thuringiensis to a binder is (8-20):(5-10):(7-12):(0-25):(0-3):(0-0.2):(0-0.2):(0-0.1):(0-1):(0-0.3):(1-8):(0-0.5):(0-1):(0-2):(0-2):(2-10). According to the special fertilizer for the eucalyptus, the ratio of nutrients of nitrogen, phosphorus, potassium and the like required by growth of the eucalyptus is scientifically calculated according to the nutrient absorption distribution characteristic of the eucalyptus, and then scientific proportioning of the nutrients of nitrogen, phosphorus, potassium and the like is carried out by taking fertilizer supply rates of various soil and utilizing rates of various fertilizer nutrients as important factors, so that the provided eucalyptus special fertilizer can comprehensively meet accurate requirements of a large amount of nutrients in growth and develop of the eucalyptus in all stages,cost of the fertilizer is reduced, the utilization rate is improved, and then the yield and quality of the eucalyptus are improved.

The invention discloses a vector matrix arithmetic unit in a memristor memory and an arithmetic method. The vector matrix arithmetic unit comprises an input splitting unit, decimal multiplication units and an external accumulation unit; multiple decimal multiplication units are arranged, and each decimal multiplication unit comprises a memristor array; the decimal multiplication units are connected in parallel; the output terminal of the input splitting unit is connected with the input terminal of each decimal multiplication unit, and the output terminal of each decimal multiplication unit isconnected with the input terminal of the external accumulation unit. By splitting the input floating-point number vector and the floating-point number in the floating-point number matrix bit by bit, high-precision mapping of the floating-point number is realized, vector-matrix operation of the floating-point number can be executed on the premise of no precision loss, the influence of the non-idealeffect of the memristor on a calculation result is effectively reduced, and high-precision calculation of the floating-point number is realized. In addition, due to the adoption of a decimal mappingmode, the number of required devices is small, and the area overhead of the circuit is also small.

The present invention relates to a device for rapidly converting a low-flow, highly compressed digital audio-visual stream from a receiver installed in the user's home into another digital audio-visual stream, according to a new and unknown method, The stream is less compressed, but fully applicable in the audio receiver that plays it. The invention is especially suitable for application in open receivers and modules compatible with DVB-CI standards.

The invention discloses a method for applying weather radar standard format base data to a geographic information system, and relates to an information system, in particular to an information system combining a geographic information system (GIS) and the weather radar standard format base data. According to the method, a national geographic information public service platform is used; administrative division data in a sky map and data information of villages and towns, administrative villages and natural villages in Yunnan digital villages are used as data sources; longitude and latitude dot matrix data are read in a C # development environment, drawing of a geographic information layer is realized by adopting an equidistant cylindrical projection mode, and superposition control of a transparent layer and basic functions of a geographic information system are completed by adopting a control combination and control technology. The method does not need to install any control, is convenient to use, accurate in map data and free of display deviation, can be matched with meteorological products, and can meet the practical requirements of the meteorological industry for geographic information.

The invention belongs to the technical field of filter apparatuses and particularly relates to a filter for filtering liquid. The filter comprises a discharging part, a locking fastener, a sealing ring, a filtering net and a feeding part, wherein the discharging part is fixedly connected with the feeding part through the locking fastener; the sealing ring and the filtering net are sequentially arranged between the discharging part and the feeding part; the filtering net is in close contact with the sealing ring, and by virtue of the locking fastener, the close sealing is achieved. The filter formed by means of assembling simple components is simple in structure, easy to wash and dismantle, low in production cost and filtrate loss, high in filtering precision, long in service life and the like; more importantly, the filter also comprises a connecting part, and multiple structures can be additionally arranged to meet the requirements of users on precision.

The invention discloses a segmented-absorption fully-degradable coated tobacco rod fertilizer. The rod fertilizer is sequentially divided into an early-stage fertilizer, a middle-stage fertilizer and a later-stage fertilizer from outside to inside, a first full-degradable material coating is arranged outside the early-stage fertilizer, a second full-degradable material coating is arranged between the early-stage fertilizer and the middle-stage fertilizer, and a third full-degradable material coating is arranged between the middle-stage fertilizer and the later-stage fertilizer; the disintegration time of the first full-degradable material coating is 1-2 days after planting, the disintegration time of the second degradable coating material is 25-30 days after planting, and the disintegration time of the third degradable coating material is 55-60 days after planting. All the degradable material coatings are completely degraded into CO2 and H2O after being disintegrated for 1-2 months. According to the method, base fertilizer, primary topdressing and secondary topdressing in a traditional fertilization mode are separated by adopting different full-degradable material coatings, and the early-stage fertilizer, the middle-stage fertilizer and the later-stage fertilizer are gradually dissolved and absorbed after application, so that the precise requirements of tobacco on the fertilizer in each growth stage are met.