59results about How to "Uniform precision" patented technology

The invention relates to a multi-site point cloud integral orientation method based on a laser beam process block adjustment. The multi-site point cloud integral orientation method comprises the steps: 1, distributing a target in each scanning site, determining coordinates of each target center in an engineering surveying coordinate system, and forming a block; 2, performing coarse scanning on a ground feature on each scanning site, performing fine scanning on a spherical orientation target, forming an original point cloud of each scanning site, and establishing a space index of the original point cloud; 3, figuring out coordinates of the target in a scanner coordinate system of each scanning site by using a spherical fitting method; 4, making up block adjustment information; 5, firstly setting one group of error equations of laser beams for each target, if the target is a public target of N scanning sites, setting N-1 groups of constraint equations, forming an all-regional method equation by the equations, and resolving orientation parameters of all scanning sites by using a surveying adjustment summary model; 6, evaluating the point cloud orientation precision; and 7, converting point cloud coordinates of all sites into the engineering surveying coordinate system to realize multi-site point cloud integral orientation.

The invention relates to a deep sea pipeline test pipe piece line-marking device and method. The device can comprise a base, a line-marking pen rack detachably installed on the base and a line-markingpen detachably installed on the line-marking pen rack; two sliding rails which extend in the length direction and in parallel and are spaced are arranged on the base, at least two pairs of rolling bearing supports which are spaced in the length direction are arranged between the sliding rails, and a test pipe piece to be marked is supported by the rolling bearing supports and can roll; the line-marking pen rack comprises two trapezoid supports and an angle measuring arc frame, and the two trapezoid supports are correspondingly and slidably connected to the two sliding rails; the angle measuring arc frame is fixedly connected to the upper ends of the two trapezoid supports, a sliding groove with the front and the back communicating is formed in the angle measuring arc frame, wherein the sliding groove extends in the circumferential direction, at least one side face is provided with an angle mark scale ranging from 0 degree to 180 degrees, and at least one hollow pen tube capable of moving along the sliding groove is installed on the sliding groove; and the line-marking pen is movably arranged in the hollow pen tube in a friction mode. The device is simple in structure, convenient to use and high in precision.

The method makes multiple connections of data signal and pilot signal at the sending end of the communication system after mapping the coded modulation. Also the method makes the pilot signal appear at some frequency points only, and the data have no such frequency components. The circle prefix is added into each data block at the sending end, and the circle prefix is removed at the receiving endin order to eliminate interference between data blocks or between signals in frequency domain caused by time delay expand in multiple routes. Then, the channel parameter estimation at the corresponding frequency point is obtained by using the picked pilot signal in frequency domain. Base on the estimation at the said point, the channel parameter estimations for all frequency points are obtained by using the interpolation method. The invention has the advantages of simple algorithm and high accuracy for channel parameter estimation.

In order to precisely detect latent defects where a data-synchronizing signal is to be stored despite changes in the rotation of an information storage medium, a region data detection is used during a defect detection mode that is longer in the back-and-forth direction than a data-synchronizing signal used during a normal operation mode. The data detection region may be increased by the amount of change in the rotation. Thus, latent defects that may, due to a change in the rotation of the storage medium, come into agreement with the position of a data-synchronizing signal utilized during a normal mode of operation may be reliably detected, maintaining a high precision by taking a change in the rotation of the storage medium into consideration.

The invention relates to an integral orientation method of ground scanning point cloud through linear fitting. The method is characterized by comprising the following steps: (1) distributing a spherical orientation target in a measured regional network for multistation scanning to obtain scanning point cloud data; (2) connecting into lines from all scanning stations to the spherical orientation target observed on the scanning stations to form the regional network; (3) carrying out fitting on coordinates of the sphere center of the spherical orientation target in a scanner coordinate system; (4) collating run adjustment; (5) setting up a mathematical model of a single laser beam, deducing a linear fitting mathematical model of the laser beam with the same name, estimating the error in point measurement of point cloud orientation, and transforming point cloud coordinates into a coordinate system designated by engineering surveying, thereby achieving integral orientation of point cloud. According to the method, the parameter approximate value is not required to be calculated, solution parameters can be directly fitted, the formula is simple, and the more the scanning stations are, the higher the resolving precision is.

The invention relates to the technical field of battery management systems, in particular to an active equalization control method and system for the lithium ion battery. The lithium ion battery is provided with a plurality of single batteries which are connected in series, and the active equalization control method comprises the following steps: S1, estimating the initial value of the residual electric quantity of the lithium ion battery, and obtaining the estimated value of the residual electric quantity of the lithium ion battery and the voltage detection value of the lithium ion battery inreal time; S2, according to the estimated value of the residual electric quantity of the lithium ion battery and the voltage detection value of the lithium ion battery, respectively calculating the average value of the residual electric quantity of the lithium ion battery and the average value of the voltage of the lithium ion battery; S3, according to the average value of the residual electric quantity and the average value of the voltage, judging the single batteries needing to be equalized; and S4, equalizing the single batteries needing to be equalized. The method has the beneficial effects that the precision and reliability of the equalization system can be improved, the use efficiency of the battery is improved, the service life of the battery is prolonged, the control method is simple, the requirement on the controller is reduced, and the system reliability is improved.

An image reading apparatus sets an irradiation region below a fixed reading glass when light guide members diffuse light of LEDs upward so that the irradiation region corresponding to a significantly sagged portion in a main scanning direction is wider than that corresponding to portions on both sides of the significantly sagged portion, and sets a light intensity of a plurality of LEDs corresponding to the significantly sagged portion in the main scanning direction to be larger than that of a plurality of LEDs corresponding to the portions on both sides of the significantly sagged portion. Therefore, the degradation of the illuminance corresponding to the significantly sagged portion due to the pressed fixed reading glass can be prevented, and the entire document can be read with uniform reading precision.

The invention provides a low-intermodulation compatible type connection radio frequency socket and plug. The socket comprises an outer socket conductor, an inner jack conductor, a socket insulating support, an end face reed and a radial reed. The outer socket conductor is internally provided with an annular groove matched with and coupled to an outer plug conductor. The inner side of the annular groove is the front-segment tongue diameter, and the end face of the annular groove is a mechanical benchmark face. The front-segment tongue diameter and the mechanical benchmark face are designed to be of an integrated structure. The inner plug conductor in the plug is internally provided with an annular groove matched with and coupled to the outer socket conductor and an unlocking sleeve. The inner side of the annular groove is matched with the outer side of a socket-shaped groove in the radial direction, the satisfactory axial matching length is set, and the bottom of the annular groove is the mechanical benchmark face. According to the low-intermodulation compatible type connection radio frequency socket and plug, improvement is conducted on the mechanical benchmark face and electrical benchmark face separating design and contact outer conductor slotting design in the prior art, continuity of full-spectrum characteristic impedance and electric connectivity of a contact port are guaranteed, intermodulation interference and reflection coefficients are further lowered, and wider working bands and excellent return losses are achieved.

An object is to charge resin into cavities in accordance with molding conditions individually set for the cavities by controlling valve gates disposed within a mold apparatus or a mold support apparatus by use of a controller, to produce individual molded products under optimal molding conditions, to produce molded products having no variation in molding accuracy and quality, and to lower the cost of the mold apparatus. For such a purpose, an injection molding machine includes a plurality of cavities formed in a mold apparatus; resin passages for charging resin into the cavities; a plurality of selection means respectively disposed in the resin passages corresponding to the cavities and adapted to selectively open and close the corresponding resin passages; and a controller for controlling the selection means.

The invention belongs to the technical field of radiation dose calculation, and relates to a Monte Carlo dose calculating method, a Monte Carlo dose calculating device and a storage medium. The methodcomprises the following steps: (1) preprocessing: inputting a patient image, sketching information, a field size, an illumination direction and a source parameter; (2) processing a model: reconstructing the patient image, reconstructing the two-dimensional patient image into a three-dimensional model, and gridding the three-dimensional model; (3) simulating particle input: calling a Monte Carlo database, and simulating particle transport by using the Monte Carlo particle transport principle to obtain a dose distribution and a standard deviation distribution; and (4) outputting the obtained simulation result. The resolution and the precision are balanced, the precision is improved by reducing a certain resolution to make the precision of an interested region uniform; and the calculating speed is large, and the total precision can be easily evaluated.

The invention discloses a binocular visual sense based intelligent obstacle avoidance algorithm. The algorithm comprises the following steps that S1) a route is planned according to a destination of arobot, left and right cameras of a binocular camera are calibrated, and plane equations of the ground in coordinates of the left and right cameras are calculated respectively; S2) the binocular camera collects an image in front of the robot, and the image is de-noised; and S3) distortion and polar lines in the two images collected by the left and right cameras of the binocular camera are corrected, distortion is eliminated, matching points are limited in one straight line, and finally, a parallax image is obtained by matching. The algorithm satisfies the requirement for detecting barriers correctly in high precision, the requirement of real-time detection can be met, the accuracy and instantaneity are both taken into consideration, and the robot achieves a good obstacle avoidance effect.

The invention relates to a deep-sea pipe test pipe scribing device and method. The device comprises a base, a scribing pen holder detachably mounted on the base and a scribing pen detachably mounted on the scribing pen holder. The base is provided with two spaced sliding rails extending in parallel along the length direction. At least two pairs of rolling bearing supports spaced apart in the length direction are disposed between the sliding rails. A test pipe to be scribed is supported by the rolling bearing supports and can roll. The scribing pen holder comprises two A-shaped supports and a cross beam. The two A-shaped supports can be slidingly connected to the two sliding rails. The cross beam is fixedly connected to the upper ends of the two A-shaped supports and is detachably providedwith at least one hollow stylus tube. The scribing pen is movably and frictionally arranged in the hollow stylus tube. The device has a simple structure, realizes a low preparation cost, is easy to use and has the high test pipe axial line and circumferential line drawing precision.

Can shells are produced with tooling installed on a mechanical press, and the tooling includes an upper retainer supporting a blank and draw die enclosing an outer pressure sleeve and an inner pressure sleeve surrounding a die center punch, all having pistons. An air chamber is connected by air spring passages to the inner pressure sleeve piston, and the outer pressure sleeve receives the same air as the air chamber or lower pressure air. The die center punch has an insert which initiates the drawing of a cup, and the inner pressure sleeve and die center punch have contoured surfaces which mate with opposing surfaces on a die core ring to form and clamp the chuckwall of the shell during downstroke of the press. A panel punch has peripheral surfaces which form the panel wall and countersink of the shell during upstroke of the press.

The invention provides a network social system and a network social method based on active broadcast pushing. The network social system comprises a selection module, an information pushing module andan information display module, wherein the selection module is used for selecting a reception user group according to user features by a transmission user; the information pushing module is used for receiving a selection result of the selection module, and pushing corresponding target information according to the reception user group selected by means of the selection module; and the information display module is used for receiving the target information pushed by means of the information pushing module, and displaying the target information to the reception user group. The network social system and the network social method provided by the invention select the reception user group according to the user features, actively push broadcasts, transmit the target information to an arbitrary user group, and solve the problem of social difficulty of one user socializing with many unfamiliar groups.

The invention relates to the field of copper electrode machining, in particular to a mirror surface chromium copper computer numerical control (CNC) machining process applied to hemispheroid or semi-ellipsoid machining. The mirror surface chromium copper CNC machining process comprises the steps: S1, a blank is clamped on a spindle of a CNC machine tool; and S2, the spindle is started to drive theblank to rotate, a cutter is selected to cut the blank, thus the blank forms a base and a machining part, the machining part is in a hemispheroid or semi-ellipsoid mirror surface profile, the machining part extends out of a main surface of the base, the axis of the machining part coincides with the axis of the spindle, and the cutter conducts one-time feed along the set route. The cutter conductsmachining along the set route, by cooperating with rotation movement of the spindle, the blank can be very smoothly machined into the mirror surface hemispheroid or semi-ellipsoid profile through one-time feed, step-shaped cutter marks caused by multiple engage and retract actions during traditional processing are avoided, further polishing is not needed, and accuracy is uniform.

The invention provides an airport pavement disease and foreign matter detection method based on fusion of multiple convolutional neural networks. The method comprises the steps of collecting airport pavement disease and foreign matter images; constructing an airport pavement disease foreign matter database for training a neural network; building a target detection algorithm YOLOv3 and a Mask R-CNN (Convolutional Neural Network); the hyper-parameters of the convolutional neural network are adjusted until convergence and an error loss value meet requirements, the network weight parameters at the moment are stored, and training of the YOLOv3 and Mask R-CNN convolutional neural networks is completed; the trained YOLOv3 and Mask R-CNN convolutional neural networks are fused, and an intelligent segmentation model of the airport pavement disease and foreign matter pixel level is constructed; inputting a test image into the stored model, and outputting a segmentation result of the diseases and the foreign matters of the airport pavement; and carrying out statistics on pixels of the image corresponding to the mask of the segmentation result, and outputting semantic information of airport pavement diseases and foreign matters. The method has better robustness and generalization ability, and can improve the segmentation precision and efficiency of airport pavement disease foreign matters.

The invention discloses a fracturing type rock tensile strength test apparatus and method. A test object is a cylindrical soil or soft rock test sample. The fracturing type rock tensile strength testapparatus comprises a mechanical structure and a control apparatus; the test sample is installed between a passive fracturing rod and an initiative fracturing rod which are vertically arranged, and the test sample is centered by virtue of an adjusting centering frame and fit to the passive fracturing rod; the initiative fracturing rod is propelled along a horizontal direction so as to fracture thetest sample; the propelling rate of the initiative fracturing rod is controlled by a rate controller of the control apparatus; a data acquisition module acquires and stores the pressure and displacement data and display the data on a display screen in a graphic manner in real time; and after the test is ended, a data analysis module calculates a tensile strength value. The fracturing type rock tensile strength test apparatus is light and compact in structure; the test needs no additional component, and the system error is small; the test sample is convenient to install, the operation is simple, and the test efficiency is high; and the test sample is vertically arranged and is firm without slippage, the test sample position is stipulated by adopting the centering frame, the generation of deviatoric stress is avoided, the uniformity of the test sample destruction effect is ensured, and the test result is accurate and reliable.

The invention provides a multi-modal composite coding image retrieval method and system, and the method comprises the steps: obtaining to-be-retrieved information, and judging the data type of the to-be-retrieved information; selecting the coarse-grained retrieval or fine-grained retrieval according to the data type of the to-be-retrieved information, wherein the fine-grained retrieval comprises the steps that when the input to-be-retrieved information comprises image description data and text description data at the same time, the two features are fused to obtain composite features, and then data retrieval is conducted through the composite features. According to the method, coarse-grained retrieval or fine-grained retrieval can be selected according to the data type, the composite features can be obtained by fusing the two features, and then data retrieval of fine-grained retrieval is carried out through the composite features; according to the method, the database construction efficiency can be improved, the flexibility of a retrieval mode is improved, the retrieval difficulty is reduced, and a solution which is uniform in precision and generalization performance and more flexible in switching between fuzzy retrieval and accurate retrieval is provided for image retrieval.

The invention discloses a rock-soil parameter random field inversion method. The method comprises the following steps: analyzing conventional statistical characteristics, spatial correlation structures and spatial correlation functions of rock-soil parameters; according to the precision requirement of geotechnical engineering reliability analysis, determining the calculation range of the spatial correlation of the geotechnical parameters; constructing a spatial correlation matrix B according to the calculation range of the spatial correlation and the grid size of the engineering analysis numerical model; solving a coefficient vector c according to the spatial correlation matrix B; utilizing a pseudo-random program to assign an initial random value to each grid of the engineering analysis numerical model, and generating an initial random field; depending on basic inversion equations, performing cyclic operation on each grid in sequence; generating parametric random fields, wherein the basic inversion equation is shown in the specification; wherein x (p, q) = m (p, q) + sigma(p, q) cTu, in the formula, x (p, q) is a parameter random value of any grid (p, q), m (p, q) is a mean valueat the grid (p, q), sigma(p, q) is a standard deviation at the grid (p, q), c is a coefficient vector, and u is an initial random vector which is generated based on an initial random field and influences parameter value at (p,q).

The invention provides a base station frequency regulation method and device. The method includes the steps of obtaining an original local frequency, regulating the original local frequency to obtain a target local frequency, obtaining a digital intermediate frequency according to the target local frequency, a cell center frequency and a fixed intermediate frequency, and regulating a base station frequency according to the target local frequency and the digital intermediate frequency. According to the technical scheme, the system performance is improved, the achievement cost is reduced, the base station frequency is not limited by the frequency accuracy of a local oscillator chip, and configuration methods and configuration accuracy of the base station frequency are unified.

The invention discloses a dynamic weight-based A star algorithm improvement method, system and device, and a medium. The method comprises the steps of obtaining environment information collected in a flight process of an unmanned aerial vehicle; improving an evaluation function of an A star algorithm; designing a dynamic weight generator, and generating a heuristic weight of the current node in real time according to the environment information; when the unmanned aerial vehicle is close to the starting point, the proportion of h (n) is large; when the unmanned aerial vehicle continuously approaches the target, the weight of g (n) is gradually increased; wherein h (n) is the estimated cost of moving from the specified position to the terminal point, and g (n) is the moving cost of moving from the starting point to the specified grid. According to the method, in the process that the unmanned aerial vehicle carries out path finding on the target point, the dynamic heuristic weight adjusted in real time is added into the path evaluation function of the A star algorithm, and unification of path finding accuracy and efficiency is achieved. The method can be widely applied to the technical field of unmanned aerial vehicle obstacle avoidance and path planning.

The invention discloses an image target detection method, and belongs to the technical field of computers. The method comprises the steps of obtaining a to-be-processed target image; inputting the target image into a convolutional neural network model, and extracting at most five feature maps; outputting a prediction box corresponding to each of the at most five feature maps based on the convolutional neural network model; and performing target identification on all the prediction frames through a detection module to obtain the identification result of the target image, wherein the detection module comprises a residual block and a detection convolution layer which are connected in sequence. The invention further discloses an image target detection device, a storage medium and a sewage pipeline detection device. According to the method, accurate image recognition and detection can be performed under the condition of strictly limiting the system memory and the calculation cost.

A tenon mortise cutter for solid wood furniture includes a work piece positioning device and an eccentric cutting device. The work piece positioning device includes a work piece fixing mechanism, a tenon mortise length setting mechanism, and a tenon mortise center positioning mechanism. The eccentric cutting device includes a tenon mortise thickness and cutting mode setting mechanism, a caving machine fixing mechanism, and a rotation shaft sleeve. The work piece positioning device and the eccentric cutting device are connected together through the rotation shaft sleeve to work together, and then cutting and machining of a tenon and a mortise can be finished through linear motion and rotation motion.

The invention relates to the communication field and discloses a channel equalization method and communication equipment. The method comprises steps: a receiver receives information of modulation factors, wherein the modulation factors comprise pilot modulation factors and data modulation factors; the receiver receives communication signals, wherein the communication signals comprise pilot signals and data signals; the receiver acquires initial channel state information of the channel where the communication signals pass according to the received pilot signals, the known pilot transmission signals and the pilot modulation factors; the receiver adjusts the initial channel state information according to the data modulation factors and the pilot modulation factors to obtain each piece of final channel state information of the channel; and the receiver carries out channel equalization on the received data signals according to each piece of final channel state information and carries out demodulation and recovery to obtain the transmission signals of the data signals. when the technical scheme is applied, accuracy of channel equalization can be improved, and the data communication effects are improved.

The invention belongs to the technical field of engineering, hydrology and environmental geophysical exploration, and discloses a contact type induced polarization method finite element numerical simulation method, which comprises the processes of any shape lossy medium region subdivision, finite element method numerical equation solution and contact type polarizability calculation. The method solves the problem of a traditional arbitrary-shape lossy medium contact type induced polarization method finite element numerical simulation calculation method, and is simple in algorithm structure, simple and convenient in implementation process, reasonable in design and stable and reliable in calculation result; the method can be widely applied to the numerical simulation calculation of the exploration polarizability of the lossy medium in any shape through the charging method in the fields of engineering, hydrology and environmental geophysical exploration, and provides method support for numerical simulation, inversion, explanation and the like of engineering, hydrology and environmental geophysical exploration based on a complex lossy medium power supply.

The invention discloses a bare tobacco seed sower. The front end of the cylinder body is in the shape of an arc cone and is provided with a circular hole (9) with a diameter of 1.6mm-1.7mm. The push needle (6) is arranged on the cylinder. In the body, the front end of the push needle (6) is inserted into the circular small hole (9), and the push needle (6) is provided with a diameter of 0.9 mm-0.8 cm away from the front end. 1.1 mm small hole (8), the rear end of the cylinder is equipped with a cover plate, the rear end of the push needle (6) passes through the cover plate and is provided with a pressing plate, in the A spring (4) is installed between the cover plate and the pressing plate, and a limiter (7) is installed on the push pin on the other side of the cover plate. When the pressing plate is pressed, the The seed loading hole (8) at the front end of the push needle (6) can extend out of the circular hole (9) at the front end of the cylinder; a switch door (1) is provided on the cylinder. The invention relates to a naked tobacco seed planter which can precisely control the seeding quantity in the process of using the bare tobacco seeds to raise seedlings by floating.

Can shells are produced with tooling installed on a single action mechanical press, and the tooling includes an upper retainer supporting a blank and draw die enclosing an outer pressure sleeve and an inner pressure sleeve surrounding a die center punch, all having air actuated pistons. The die center piston has an air reservoir connected by air passages which form air springs for the inner pressure sleeve, and the outer pressure sleeve receives the same controllable air as the reservoir or low pressure plant air supply. The inner pressure sleeve has a projecting nose portion which initiates the drawing of a cup and has contoured surfaces which mate with corresponding surfaces on a die core ring to form and clamp the chuckwall of the shell during downstroke of the press. A lower panel punch forms the center panel, panel wall and countersink of the shell during upstroke of the press.

The invention relates to an automatic assembly device for an optical lens. The automatic assembly device comprises a first transmission unit (1), a second transmission unit (2), a reclaiming unit (3)and a lifting unit (4), wherein the second transmission unit (2) is arranged above the first transmission unit (1), and perpendicular to the first transmission unit (1); the reclaiming unit (3) is arranged on the second transmission unit (2); and the lifting unit (4) is arranged along the transmission direction of the first transmission unit (1). Through adoption of the automatic assembly device for the optical lens, the assembly efficiency of the optical lens can be improved greatly.