34 results about "Overlap coefficient" patented technology

The invention relates to a laser micromachining process and in particular relates to a laser-water jet composite micromachining process and device. The composite micromachining process comprises the following steps of: positioning water jet at the back of a laser beam, leaning the water jet, and simultaneously acting the water jet on the surface of a material, wherein the parameter of a water jet offset distance is as follows: the water jet offset distance, namely the range of the distance between a laser beam action point and post-positioned water jet erosion point, is 0.4-0.8mm; the focal plane position (fpp) parameter of the laser beam is minus 0.6mm-0mm; the energy parameter of laser pulse is 0.3mJ-0.6mJ; the overlap coefficient of mobile laser pulse is 99.3%-99.9%; and the pressure of water jet is 5MPa-20Mpa, and the erosion angle of the water jet is 30-60 degrees. The device provided by the invention is composed of a base body consisting of a horizontal guide rail and a vertical guide rail, a horizontal slide plate, a vertical slide plate, a rotary adjusting support, a water jet unit and a laser cutting unit. According to the invention, the laser heating and softening temperature is far less than the melting or gasifying temperature, the heat influence on a material machining zone is reduced, and high-efficiency, stable and near-nondestructive precise machining is realized.

Disclosed herein is a method for recognizing a parking space line marking for a vehicle, including: detecting, by a processor, a plurality of parking spaces from a portion of a parking space line marking in an image; calculating, by the processor, an overlap coefficient representing a degree of overlapping between the detected parking spaces; selecting, by the processor, a parking space having a largest brightness coefficient as a final parking space by determining overlap when the overlap coefficient has a predetermined magnitude and comparing the brightness degrees of the overlapped parking spaces.

The invention discloses a method and a device for emitting and receiving symmetrically-distributed light beams of laser radar. A system adopts the method for independently emitting and receiving the light beams with a plurality of wavelengths, thereby eliminating an effect on a measurement result caused by different divergent angles and refractive indexes of the laser beams with the different wavelengths, independently realizing the calculation of the overlap coefficient of the system under the different laser wavelengths, developing the real coaxiality or completely parallel optical axes of receiving and emitting optical systems, ensuring data comparability and providing the method for the further development and practical application of the laser radar. The independent emission of the light beams with the different laser wavelengths in the system can be debugged under a visible software interface, so that an ordinary operator can finish the operation and maintenance of the system without the help of a precise measuring instrument or special technical personnel.

The invention provides a UE cell overlapping coverage condition detection method and system. A measurement report of UE and cell sites occupied by the UE is obtained, distance between the UE and the cell sites occupied by the UE is calculated, the longitudes and latitudes of the cell sites occupied by the UE are obtained, according to the longitudes and latitudes of the cell sites occupied by the UE, the measurement report of the UE and the cell sites occupied by the UE and the distance between the UE and the cell sites occupied by the UE, the longitude and latitude of the UE are calculated, then a UE cell overlapping coefficient is calculated, and a UE cell overlapping coverage condition detection result is obtained. In the whole process, according to big data mining of the measurement report of the UE and the cell sites occupied by the UE, and based on the distance between the UE and the cell sites occupied by the UE, and geographical location information of the longitude and latitude of the UE and the longitudes and latitudes of the cell sites occupied by the UE, a UE cell overlap coefficient is calculated, and simple and accurate detection of the UE cell overlapping coverage condition is realized.

The invention relates to an abnormal water detection method based on immune negative selection, which comprises the following steps: 1) carrying out real-time monitoring with zebra fish as an object of biological monitoring; 2) carrying out real-time detection and tracking of the zebra fish through a multi-target tracking algorithm based on particle filtering, thereby obtaining a zebra fish tracking video sequence; and 3) analyzing and detecting water data, which comprises the following steps: 3.1) producing a large amount of novel data through high-frequency variation of a self-set and simultaneously carrying out low-frequency variation of the self-set; 3.2) producing a maturity detector through a detector generating algorithm based on negative selection; 3.3) judging whether the detector set is mature through combination of expectation coverage and overlapping coefficient calculation (W); and 3.4) carrying out online detection of real-time water data with the maturity detector and finally carrying out online detection of the abnormal water. The invention does not need a large amount of abnormal data, thereby reducing the detection cost and improving the real-time detection.

A control method for panoramically aerial camera photographing signals belongs to the aerial camera measuring and imaging technology control field. According to velocity-height ratio, index overlapping coefficient, target slant angle and roll angle of an airplane at the current moment, a cameral controller figures out the scanning initial position, the scanning beginning position, the scanning ending position, the photographing time t photographing and the photographing period T of a lens cone which serve as working parameters to be sent into a lens cone system. The lens cone system controls timing sequence sending position / speed signals and photographing pulse signals at the scanning initial position according to photographing signals. Finally, after receiving the position / speed signals and the photographing pulse signals sent by the lens cone system, a reflector conducts image motion compensation, a focusing system automatically focus, and a roll system conducts roll compensation; therefore, all systems finish the consistency of the functional timing sequence in the he photographing time and the requirement of the camera meeting the index overlapping coefficient is guaranteed.

The invention belongs to the technical field of metal laminated plate laser cladding preparation, and relates to a method for preparing a wave-shaped junction surface metal laminated plate through laser cladding. The method comprises the following steps: placing a metallic matrix on a workbench of a laser machine, irradiating the surface of the metallic matrix through laser beams, and irradiating and heating the metallic matrix through laser beams with the laser power of 550-640w and the scanning speed of 300-500 mm / min; conveying cladding powder at the powder feeding speed of 1.5-2.5 g / min coaxially and synchronously under the protection of inert atmosphere to enable partial surfaces of the cladding powder and the metallic matrix to be melted to generate a molten pool, and cladding in the scanning direction through laser beams so as to form a single-track cladding layer; continuously scanning through moving an overlapping distance with the overlapping coefficient of 0.3-0.4 in the overlapping direction perpendicular to the scanning direction so as to form a double-track cladding layer, and repeatedly scanning, so as to form a wave-shaped junction surface metal laminated plate on the surface of the metallic matrix. The yield strength and ductility of the laminated plate provided by the invention reach the standard of a stainless steel laminated plate.

The invention relates to a bi-directional gear motor; a transmission gear inside the outside shell of the motor is a pair of meshed driving and driven gears, and a main shaft of the driving gear and an auxiliary shaft of the driven gear are arranged. The motor is characterized in that the transmission gear has the following standards: the pressure angle is 22.5 degrees, the central distance is 31.3mm, the modulus is 2.75 and the number of gears is 11. The motor reduces the overlap coefficients of gears, automatically adjusts the radial gap of gears and the gap at the meshing line of gears; reduces the radial size, improves the working press and mechanical efficiency, and promotes the high-temperature starting performance, lowers the production cost and improves the economic benefit by optimizing the general structure comprising a shaft sleeve, a sealing ring, etc.

The invention discloses a preparing method of a gear for a fuel delivery pump, which comprises the following steps that a gear blank is molded by casting, and the gear blank comprises the following chemical components by weight percent: 2.85 to 3.25% of C, 1.2 to 1.5% of Si, 0.8 to 1.2% of Mn, 0.6 to 0.8% of P, 0.05 to 0.07 of S, 0.24 to 0.35% of Cr and 0.7 to 0.9% of Cu; the temperature of the gear blank which is molded by casting is lowered to 300 DEG C, then the gear blank is heated to 650 to 760 DEG C, and the temperature is kept for 3 to 5 hours; furnace cooling is performed, so that the temperature of the gear blank is lowered to 300 DEG C, and the temperature is kept for 4 hours; then the gear blank is heated to 650 to 760 DEG C, and the temperature is kept for 17 hours; and finally, the gear blank is cooled to 450 DEG C at a cooling rate of 50 DEG C / hour and then cooled to 140 DEG C at a cooling rate of 20 DEG C / hour. The preparing method has the advantages of no axial component in the process of engagement, large overlap coefficient, good use performance, low noise, strong bearing capacity, smooth transmission, high efficiency and large bending resistant strength.

The invention relates to a method for updating a media program. The method comprises: a resource server establishes class groups correspondingly according to different classes of program resources; a client collects watching log information of a user's video, carries out pretreatment and analyzes the processed log information to obtain user preference information, uploads the user preference information to a system server, and the system server makes recommendation to the user based on the preference information to enable the user to join in a corresponding class group; the system server establishes an association class group according to class group matching degrees of a plurality of users; and according to the plurality of class groups of the users, program resource interface updating of associated user clients is carried out according to a descending order of overlap coefficients. According to the method, association established between users with the same preference information is at the equal level; the server can integrate information updating of all users; and the pertinency is high.

The invention discloses a gear pump with an asymmetric combined curved surface tooth form. The gear pump comprises a hollow pump body; a driving gear and a driven gear which are meshed mutually are arranged in the pump body; a tooth surface on one side where the driving gear and the driven gear are contacted and stressed is a working surface, and the tooth surface on the other side is a non-working surface; a pressure angle of the working surface is 20.5 to 22.8 degrees; the gear pump is characterized in that: a pressure angle of the non-working surface is 14 to 19 degrees; and the non-working surface is formed through smooth transition of an evolvent curved surface and a circular arc camber. The gear pump has large single pump output, a large overlap coefficient, small noise, low gear collapsing probability, and transmits stably, and the chamber sweeping phenomenon is avoided.

A receiving apparatus and receiving method employ a digital multi-carrier transmission technique utilizing a real coefficient wavelet filter bank in digital demodulation. The receiving apparatus may include a memory configured to store received waveform data corresponding to 2K symbols or more and a wavelet transformer configured to perform a wavelet transform based on the received waveform data stored in the memory, where K is an overlapping coefficient of a wavelet filter bank utilizing extended lapped transform (ELT).

The invention discloses a multichannel electromyographic signal processing method based on noise-assisted multivariate empirical mode decomposition. The method comprises the following steps: synchronously collecting exciting bioelectric signals generated by motor nerves at muscle groups when multiple muscle groups generate movement of a limb, obtaining a multichannel electromyographic signal (MEMG), constructing a multichannel white noise sequence having the same data length as an input signal by means of the properties of EMD, EEMD and MEMD structures, superposing the multichannel white noise sequence with a picked up MEMG signal, mapping data into a multi-dimensional vector space through a low-difference Hammersley sequence, and then adaptively decomposing the data into a plurality of intrinsic mode functions in a multi-variable condition based on the empirical mode decomposition. With respect to mode queue, the mode queue of the MEMD and the NA-MEMD are higher than that of the EEMD, however the improvement effects of the NA-MEMD and the MEMD to the mode queue are close on the whole; and with respect to mode aliasing, the frequency overlapping coefficient of the NA-MEMD is smaller than that of the MEMD, and the frequency overlapping coefficient of the MEMD is smaller than that of the EMD.

The present invention relates to a double helix angle helical gear meshing pair, which relates to a non-backlash or backlash adjustable precision gear meshing pair widely used in each field of the industry. The left tooth surface and the right tooth surface of a gear are respectively helical gear tooth surfaces with different helix angles, the helix angles of the left gear tooth surface and the right gear tooth surface of the gear are different, which form certain tapered angles along a gear axle line, the relative positions of mutually meshed gears are adjusted along the axle line to adjust the meshing backlash, and the precision transmission is realized. The double helix angle helical gear is formed through processing twice, thus the tooth thickness becomes thin, a tooth space becomes wide, the manufacturability is good, because the tooth surface of the helical gear is meshed, the present invention has the advantage of helical gear meshing transmission, large overlap coefficient, and high carrying capacity, thus being suitable for the high-speed input in the precision transmission.

The invention relates to a process of marking a bar code by using laser and discloses a laser coding process of a high-reflection material. In the laser coding process, in a first making layer, a group of high-power and low frequency laser beams with high marking speed are used for drawing back the overlapping coefficient of laser spots and enabling the spots to be arrayed close to a tangential spot circle; by evaporating a plurality of pits on the surface of the high-reflection material, a diffuse surface consisting of a plurality of spots is formed on the surface of the high-reflection material; and in a second marking layer, high-frequency and power laser beams with low marking speed are used, so that the overlapping coefficient of the spots of the high-reflection material in the unit area is increased, the action time of laser is prolonged, the surface of the high-reflection material is oxidized to generate metal oxides, the surface color of an oxidizing layer is deepened and the color of the part which is not oxidized is shallow and the surface of material is divided into two varied reflective surfaces with different colors. The invention solves the phenomenon that the laser marked bar code of the high-reflection material cannot be read and greatly improves the reading rate and the reading efficiency for marking bar codes on the metal.

The invention discloses a color moire elimination method and device. The method comprises the following steps: acquiring an original image; calculating a brightness component and three color components of the original image; obtaining a frequency spectrum overlapping coefficient of the brightness component and each color component in the three color components; according to the frequency spectrumoverlapping coefficient, obtaining a weight coefficient corresponding to each color component in the three color components, and the weight coefficient being larger than 0 and smaller than or equal to1; and obtaining output values of four color channels according to the brightness component, the three color components and the weight coefficients of the three color components.

The invention provides an automobile transmission which is transmitted by an arc cylindrical gear pair, belonging to the mechanical transmission technical field. The automobile transmission comprises a shell, a first shaft, a second shaft and a middle shaft which are arranged in the shell, and gears arranged on the shafts. The invention is characterized in that: the automobile transmission adopts the arc cylindrical gears with a tooth trace being an arc line, a tooth profile being an involute curve or an arc, and equal width of circumferential tooth space at reference circles of the gears. The automobile transmission has the advantages of scientific and reasonable structure, simpleness and compactness, easy production-manufacturing, low installation requirement and high transmission efficiency. Motion transmission is carried out through the arc cylindrical gear pair, speed variation is realized through the gear ratio of a driving arc cylindrical gear and a driven arc cylindrical gear, and a driven shaft outputs velocity, so that the aim of non axial transmission force component when the gears are meshed, large overlap coefficient, good teeth contact strength, smooth transmission and low noise can be achieved. The automobile transmission by using the arc cylindrical gears has higher transmission efficiency, longer service life and lower transmission noise.

The invention discloses a preparation method of a gear for a corrosion-resistant oil transfer pump. The preparation method comprises the following operation steps: 1), forming a gear blank by casting, wherein the gear blank comprises the following chemical components in percentage by weight: 2.85-3.25% of C, 1.2-1.5% of Si, 0.8-1.2% of Mn, 0.6-0.8% of P, 0.05-0.07% of S, 0.24-0.35% of Cr and 0.7-0.9% of Cu; reducing the temperature of the gear blank formed by casting to 300 DEG C and then heating up the gear blank to 650-760 DEG C and keeping the temperature for 3-5 hours; and cooling the gear blank to 300 DEG C in a furnace and keeping the temperature for 4 hours, and then heating up the gear blank to 650-760 DEG C and keeping the heat for 17 hours, cooling the re-heated gear blank to 450 DEG C at a rate of 50 DEG C / hour and then cooling the cooled gear blank to 140 DEG C at a rate of 20 DEG C / hour. In an engagement process, the preparation method disclosed by the invention has no axial component force, a large overlap coefficient, good corrosion resistance, a low noise, high bearing capacity, stable transmission, high efficiency and high bending strength.

Disclosed herein is a method for recognizing a parking space line marking for a vehicle, including: detecting, by a processor, a plurality of parking spaces from a portion of a parking space line marking in an image; calculating, by the processor, an overlap coefficient representing a degree of overlapping between the detected parking spaces; selecting, by the processor, a parking space having a largest brightness coefficient as a final parking space by determining overlap when the overlap coefficient has a predetermined magnitude and comparing the brightness degrees of the overlapped parking spaces.

The invention discloses a method and a device for emitting and receiving symmetrically-distributed light beams of laser radar. A system adopts the method for independently emitting and receiving the light beams with a plurality of wavelengths, thereby eliminating an effect on a measurement result caused by different divergent angles and refractive indexes of the laser beams with the different wavelengths, independently realizing the calculation of the overlap coefficient of the system under the different laser wavelengths, developing the real coaxiality or completely parallel optical axes of receiving and emitting optical systems, ensuring data comparability and providing the method for the further development and practical application of the laser radar. The independent emission of the light beams with the different laser wavelengths in the system can be debugged under a visible software interface, so that an ordinary operator can finish the operation and maintenance of the system without the help of a precise measuring instrument or special technical personnel.

The invention provides a method and a system for performing group division on netizens based on historical behaviors and interestingness. The method comprises the following steps: selecting netizens,and extracting a first information publishing / forwarding record and a second information publishing / forwarding record corresponding to the netizens; determining an overlapping coefficient, a first influence coefficient and a second influence coefficient of the first interest point and the second interest point according to a relationship between the first information publishing / forwarding record and the second information publishing / forwarding record; determining a relationship strength coefficient between the first netizen and the second netizen according to the first influence coefficient, the second influence coefficient and the coincidence coefficient; and dividing the netizen pairs of which the relationship strength coefficients exceed a set threshold value into the same group. According to the scheme, netizens in the same group can have a relatively strong influence relationship with one another, and an accurate team division basis is provided for subsequent disambiguation processing between different group viewpoints.

The invention provides a UE cell overlapping coverage condition detection method and system. A measurement report of UE and cell sites occupied by the UE is obtained, distance between the UE and the cell sites occupied by the UE is calculated, the longitudes and latitudes of the cell sites occupied by the UE are obtained, according to the longitudes and latitudes of the cell sites occupied by the UE, the measurement report of the UE and the cell sites occupied by the UE and the distance between the UE and the cell sites occupied by the UE, the longitude and latitude of the UE are calculated, then a UE cell overlapping coefficient is calculated, and a UE cell overlapping coverage condition detection result is obtained. In the whole process, according to big data mining of the measurement report of the UE and the cell sites occupied by the UE, and based on the distance between the UE and the cell sites occupied by the UE, and geographical location information of the longitude and latitude of the UE and the longitudes and latitudes of the cell sites occupied by the UE, a UE cell overlap coefficient is calculated, and simple and accurate detection of the UE cell overlapping coverage condition is realized.

The invention discloses a crankshaft timing gear manufacturing method. The crankshaft timing gear manufacturing method comprises the following steps: (1) selecting a forge piece made from 20 CrMnTi, placing the forge piece into a normalizing furnace, controlling the temperature in a range of 900-930 DEG C and controlling heating time to be 3h; (2) selecting a numerically controlled lathe and a cemented carbide cutter; (3) using the numerically controlled lathe and the cemented carbide cutter to perform gear finish turning, wherein the other large end f is turned to be 40+0.050mm, the small end 8 is turned to be 19.7+0.030mm, the outer diameter h is turned phi 175.60-0.02mm, and a groove j and an inner hole e are turned to be phi 24.8+0.020mm. The crankshaft timing gear manufacturing method is free of axial component force in the meshing process, large in overlap coefficient, good in using performance, small in noise, strong in bearing capacity, stable in transmission, high in efficiency and large in bending resistance.

The invention discloses an antenna downtilt angle adjustment method and device based on an LTE network, which are used to solve the problem of resource waste caused by manual intervention and inaccurate data in the existing antenna adjustment technology. It is unreasonable and cannot guarantee the reliability of the wireless transmission of the system. The method includes: calculating the weak coverage coefficient and overlapping coverage coefficient of each cell through the simulation results of the propagation model, and screening out problem cells according to the weak coverage coefficient and overlapping coverage coefficient of each cell, and finally according to the problem cell The priority of each cell, and the coverage area of ​​each cell, adjust the antenna downtilt angle for each problem cell in turn. In this way, manual intervention is reduced, which saves resources, and the obtained data is calculated by simulation rather than empirical values, which simplifies the optimization process and improves the optimization efficiency. At the same time, the accuracy of the antenna downtilt angle is improved to ensure reliable transmission. sex.

The invention discloses a high-pressure gear oil pump which comprises a pump body, two end covers, a driving gear shaft and a driven gear shaft. The two end covers are arranged at the two ends of the pump body correspondingly. The driving gear shaft and the driven gear shaft are arranged in the pump body. The driving gear shaft is provided with a driving gear, the driven gear shaft is provided with a driven gear, and the driving gear and the driven gear are in engaged transmission. According to the gear parameters of the driving gear and the driven gear, the pressure angle is 28 degrees, the center distance is 33 mm, the modulus is 3.25, and the number of teeth is 10. The gears of the parameters are adopted, and therefore the overlap coefficient of the gears can be effectively reduced, the radial clearance of the gears and the clearance at the engaging lines of the gears are automatically adjusted, and the oil trap volume is reduced; the sliding coefficient and contact stress of gear faces are reduced, leakage of engaging points is reduced, the axial size of the gear oil pump is reduced, and therefore the service life of the gears is prolonged, and the volume efficiency of the gear oil pump is improved; and the work reliability of the gear oil pump is effectively improved, the service life of the gear oil pump is effectively prolonged, the production cost is reduced, and economic benefits are improved.

Provided is a method for manufacturing a radial iron core cake. The method includes the steps of cut sheet arranging, centrifugal sheet arraying and circle-narrowing forming. Magnetic conduction silicon steel sheets with different sheet widths are arrayed on a plate surface of a bearing plate in a radial mode, the bearing plate is rotated at a high speed so that all the sheets can be thrown to the outer edge of the plate surface under the action of centrifugal force to form a neat and loosely-arrayed sheet circle, an outer circle and partition plates are removed, a steel wire rope ring is fastened and a prefabricated insulating fixed ring is sleeved with the fastened steel wire rope ring after a central circle fixing pipe and a ground lead are inserted, the steel wire rope ring and the central circle fixing pipe are detached, and then the perfect-circle radial iron core cake is formed. According to the method, all the sheets are synchronously gathered towards the central circle fixing pipe under the action of constant-pressure even tightening force so as to be tightly extruded towards one another within the set circumferential range, and therefore the sheet overlapping coefficient and effective cross section filling rate are greatly increased. The practical test shows that electromagnetic noise caused by vibration among the sheets can not occur even when an electric reactor product formed by the iron core cake is influenced by electromagnetic force in an alternating magnetic field.

The invention relates to the technical field of gears, in particular to a transmission gear. In the transmission, gears are generally adopted as a transmission part. The gear transmission is precise and high in efficiency. A spiral bevel gear transmission is often used in aerospace and transportation industries. The spiral bevel gear transmission has high transmission coefficient, large arc overlap coefficient, and smooth and steady transmission. Adopting the spiral bevel gear for transmission requires the cooperation of each part. The others parts of the spiral bevel gear transmission includea main shaft, a fixed cone lower lining plate, a fixed cone upper lining plate, an upper frame, a pressing sleeve, a buffer sound-proof layer, and a damping and cooling layer, wherein the fixed conelower lining plate is arranged on the outer side of the main shaft; the fixed cone upper lining plate is arranged on the top portion of the fixed cone lower lining plate; the upper frame is arranged on the top portion of the fixed cone upper lining plate; the pressing sleeve is arranged on the top portion of the upper frame; the buffer sound-proof layer is arranged on the outer side of the inner wall of the main shaft; and the damping and cooling layer is arranged on the outer side of the buffer sound-proof layer.

The invention discloses a gear pump with an asymmetric combined curved surface tooth form. The gear pump comprises a hollow pump body; a driving gear and a driven gear which are meshed mutually are arranged in the pump body; a tooth surface on one side where the driving gear and the driven gear are contacted and stressed is a working surface, and the tooth surface on the other side is a non-working surface; a pressure angle of the working surface is 20.5 to 22.8 degrees; the gear pump is characterized in that: a pressure angle of the non-working surface is 14 to 19 degrees; and the non-working surface is formed through smooth transition of an evolvent curved surface and a circular arc camber. The gear pump has large single pump output, a large overlap coefficient, small noise, low gear collapsing probability, and transmits stably, and the chamber sweeping phenomenon is avoided.

The invention provides a novel granulation machine. The novel granulation machine comprises a first gear, a second gear, a first bearing, a second bearing, a feeding hole, a discharge hole, a machine head, a main shaft, a nut, a main shaft thread lower cover and a bearing seat. The main shaft thread lower cover is installed at the upper end of the bearing seat. The main shaft is installed on the main shaft thread lower cover through the first bearing. The first gear is connected with the periphery of the main shaft in a sleeved mode, the second gear is connected with the first gear in a tooth mode, the second gear is installed on a granulation machine body through the second bearing, and the feeding hole and the discharge hole are formed in the upper end of the machine head. According to the novel granulation machine, the spiral bevel gear transmission is used. Due to the fact that the spiral bevel gear transmission has the advantages that the effect is high, the transmission ratio is stable, the arc overlap coefficient is big, the carrying capacity is high, the transmission is stable, the work is reliable, the structure is compact, the energy and materials are saved, the space is saved, the wear can be resisted, the service life is long, the noise is low, and the transmission pair of transmission pieces needed in transmitting equal torque saves the most space, and therefore the production stability and product quality are improved greatly.