40results about How to "Many sampling points" patented technology

The invention relates to a six-freedom joint type coordinate measurement machine calibration method. A joint type coordinate measurement machine is used as a machine to be calibrated, metal rods with cone sockets at the two ends are used as standard length devices, the metal rods are arranged in a measurement space of the machine to be calibrated in different positions and at different postures, corresponding to each posture, a hard measuring head of the machine to be calibrated is used for collecting point coordinates in the cone sockets at the two ends of the metal rods, the length between the points in every two different cone sockets can be obtained, the lengths are used as sampling data, and the least square method is used for obtaining error parameters of the machine to be calibrated. The parameter identification precision can be further improved, and further, the integral precision of the measurement machine is improved.

The invention relates to the field of canal treatment and specifically relates to a canal water pollution superior microorganism in-situ ecological restoration method. The canal water pollution superior microorganism in-situ ecological restoration method comprises the steps of measuring parameters of a canal water environment, acquiring and detecting a water sample, acquiring a bottom mud of a canal, preparing a microorganism domestication primary liquid, preparing an enrichment culture medium, domesticating the microorganism, preparing a solid inoculant, putting the solid inoculant into the canal, and detecting whether the parameters of the water sample reach the standards within 10-30 days and 80-90 days starting from the time when the solid inoculant is put. According to the method, the construction and operation costs are low, the construction is convenient and environment-friendly, and does not affect the surrounding resident and environments, the management and the maintenance are simple, no secondary pollution is caused, the purification and restoration effects are good, the self-cleaning capacity of a canal water body is strengthened after the treatment for half a year to one year, local grasses and creatures naturally grow and propagate, an original biologic chain is restored, and the purpose of in-situ biological restoration of the water environment is fulfilled.

The invention provides a short-window power frequency component extraction algorithm used in transient saturation calculation of a current transformer. The algorithm comprises the following steps that 1. an effective order number is determined, and a sampling rate is calculated: a control system estimates an order number upper limit value Lmax according to an experience formula in the time sequence analysis, in addition, a sample matrix R is constructed according to the Lmax, the sample matrix R is subjected to SVD (singular value decomposition) to obtain a singular value Sigma i, the log koc of the singular value Sigma i is taken, and the control system judges the effective order number value p and selects the sampling rate used for calculation; 2. the fault current power frequency component is calculated: the control system forms each element of an augmented sample matrix according to a new sampling sequence xD after the frequency division, in addition, an augmented sample matrix equation and a feature equation are constructed, and the control system calculates the vibration amplitude Ai, the phase theta i, the attenuation factor alpha I and the frequency fi of each component. The algorithm provided by the invention has the advantages that non-saturation section data after transient saturation of the current transformer can be utilized in a shorter data window for fast extracting the amplitude value and the phase of the power frequency component in the fault current.

The invention discloses a panorama video octagon sampling method and apparatus. The panorama video octagon sampling method includes the steps: according to a spatial definition requirement, utilizing latitude lines to divide a spherical surface into N annular curved surfaces Oi, wherein i=0, 1, ..., N-1 and N=8K, and K is an integer; utilizing longitudes to divide the annular curved surface Oi into Ti areas, wherein one of the longitudes is a 0DEG longitude; successively marking the obtained areas as Ai, j, and j=0, 1, ..., Ti-1; calculating the average value of the obtained light in every area Ai, j on the spherical surface, and taking the average value as the sampling value Si, j of a sampling point corresponding to the area; and according to the corresponding rules, arranging the sampling values into a 14K*6K matrix. The panorama video octagon sampling method and apparatus enable distribution of the sampling points to satisfy the situation that the sampling points around the equator are more and the sampling points at two poles are very few, thus avoiding redundancy of the sampling structure so as to reduce the number of the sampling points when achieving the same spatial definition.

The invention provides a method and system for measuring alternating voltages by applying a multicycle strategy to digital-to-analogue conversion. The technology in an ADC is transferred into a DAC. According to the main principle, a cycle of step waves generated by the DAC is used for covering multiple cycles of measured sine waves. The method comprises the steps that S1, P cycles of measured sine voltage signals are equally divided into N parts, no common divisor exits between P and N except for 1, and the numerical value of step wave steps is generated; S2, the N pieces of data are input into the DAC to generate a cycle of step waves; S3, the plateau voltage value of the step waves is measured; S4, difference sampling is carried out on the two waveforms; S5, a segmented sampling mode is adopted during DFT operation, and only intermediate data of the steps is calculated. The method and system have the advantages that the measuring accuracy is improved, and measuring frequency can be extended.

The invention discloses a terminal positioning method and system based on machine learning. The terminal positioning method comprises the step of: acquiring position measurement information which corresponds to a terminal and comprises MDT data, and carrying out the feature extraction of the position measurement information to obtain position feature information; based on a preset algorithm, training to obtain a position prediction model according to the position feature information; and acquiring position measurement information of the to-be-positioned terminal, and inputting the position measurement information of the to-be-positioned terminal into the position prediction model to obtain a longitude and latitude positioning result of the to-be-positioned terminal. According to the terminal positioning method, massive user data in the current network is acquired, a position prediction model is obtained by training in a big data mode, the terminal is positioned by using the position prediction model, the positioning method is directly learned from the massive data of the current network and is used for positioning according to the data of the current network, that is to say, the model itself fully considers the wireless propagation environment and link reflection characteristics of each positioning point, and accurate positioning can be realized.

The embodiment of the invention discloses a vehicle route planning method and device, an electronic device and a readable storage medium. At least one embodiment of the route planning method comprisesthe steps: receiving a request comprising site information, and determining a planning path according to a site; sampling in the planning path to obtain sampling points; determining a first samplingpoint corresponding to the current position of the vehicle and a second sampling point corresponding to the station in the sampling points; and filtering out the passing stations in the stations according to the first sampling point and the second sampling point, and determining a driving route according to the current position of the vehicle and the remaining stations. According to the scheme provided by the invention, the stations through which the autonomous vehicle passes can be filtered out, so that the driving route can be determined according to the current position of the autonomous vehicle and the remaining stations, and the driving route only comprises the stations through which the autonomous vehicle does not pass.

The invention discloses a panoramic video hexagonal sampling method and apparatus. The method comprises the following steps: dividing a spherical surface into N=6 annular curved surfaces by using latitude lines with equal intervals, making the annular curved surfaces as Oi in sequence, i = 0, and 1 ,... N-1, observing from the angle of the centre of sphere, and arranging the Oi from top to bottom; uniformly dividing the annular curved surface Oi into Ti areas by using meridians with equal intervals; calculating an average value of light within each area on the spherical surface to serve as a sampling value of a sampling point corresponding to the area; and arranging the sampling values in a matrix. By adoption of the sampling method, the redundancy of the sampling structure is avoided, and under the condition of realizing the same spatial resolution, the number of the sampling points is reduced, and the data size after sampling is reduced.

The invention discloses a soil pollution detection method. The soil pollution detection method specifically comprises: the step 1, performing soil sampling; the step 2, drying the soil sample collected in the step 1 to remove moisture, adding acid, and oscillating and heating; and the step 3, detecting the soil sample treated in the step 2. According to the soil pollution detection method, the sampling points are hexagonal sampling points, the sampling points are rich, it is guaranteed that soil components in the test area are detected accurately, the steps are simple, the used raw materials are cheap and easy to obtain, and manpower and material resources are saved.

The invention discloses a vehicle-mounted bridgehead bumping detection and analysis system and method. The method is used for detecting and analyzing the bumping condition of a bridgehead, and comprises the steps that S1, after an industrial personal computer installed in a detection vehicle starts a collection mode, pile number information of a photoelectric encoder installed on the rear wheel ofthe detection vehicle is initialized, and the photoelectric encoder, a line scanning camera installed on the rear portion of the roof of the detection vehicle, an inertial navigation system installedon an industrial personal computer and a GPS system installed on the roof of the detection vehicle are driven respectively. According to the vehicle-mounted bridgehead bumping detection and analysissystem and method, bridgehead bumping detection can be efficiently and automatically achieved, the bridgehead bumping calculation model is further established according to the longitudinal section profile curve generated according to the detection data, and the bridgehead bumping severity degree of the bridge can be quantitatively described.

The invention discloses a sampling and water pumping device with a water stop structure for hydrogeological drilling and a method, relates to the technical field of hydrogeological equipment, and aims to solve the technical problems that the sampling and water pumping device is inconvenient to set the distance from the bottom to an upper water layer to sample different water layers and sample different positions one by one, the operation is troublesome, and the sampling time is long. The lower end of an upper connecting flange is provided with an extraction balance weight component, the lower end of the extraction balance weight component is provided with three water pumping and sampling components, the number of the water pumping and sampling components is three, the lower end of the middle of a connecting conduction piece is provided with a height adjusting assembly in a threaded mode, and the upper end of the height adjusting assembly is in threaded connection with the inner side of an extraction connecting assembly; the water pumping and sampling assembly is arranged at the lower end of the extending and folding assembly, the height can be limited, the water pumping and sampling assembly serves as a balance weight, the water bottom can be sampled, three points underwater can be sampled at the same time, and one-time operation is simple and convenient.

The invention provides a panoramic video minimum deformation degree mapping method, which comprises the following steps of: according to a spatial definition requirement, dividing a spherical surface into 30n annular curved surfaces by using equally spaced latitude lines, and sequentially recording the annular curved surfaces as Ai, i = 0, 1,..., 30n-1; uniformly dividing the annular curved surface Ai into Mi areas by using equally spaced longitude lines, and calculating an average value of light rays in each area on the annular curved surface Ai as a sampling value of a sampling point corresponding to the area; and rearranging the sampling points into a rectangle according to a certain rule. According to the panoramic video minimum deformation degree mapping method provided by the invention, the sampling points can be uniformly sampled on the spherical surface as far as possible, the characteristics that the number of sampling points near the equator is large and the number of sampling points on two poles is small are kept, the inconsistency of rearranged image contents is reduced, and under the condition of achieving the same spatial definition, the problem of non-uniform sampling density is solved, and the compression efficiency is improved.

The invention discloses a melon and fruit food internal and external synchronous sampling detection device, which comprises a support mounting shell, clamping skin sampling mechanisms and an internal sampling mechanism, the clamping skin sampling mechanisms are movably arranged on the two sides of the support mounting shell, the middle part of the internal sampling mechanism is arranged in the support mounting shell and penetrates through the support mounting shell, and the clamping skin sampling mechanisms are meshed with the internal sampling mechanism. The device has the beneficial effects that the melon and fruit can be conveniently clamped and fixed, three-position sampling can be performed on the melon and fruit at the same time, the number of sampling points is large, the detection effect is improved, the structural design is ingenious, operation is convenient, internal and external synchronous sampling can be performed on the melon and fruit through simple operation, the sampling speed and the sampling point are improved, the accuracy of detection data is further improved, and when the sampling pipe and the sampling piece are both detachable, sampling and detection are facilitated at the same time, and the detection speed is further improved.