39results about How to "Simple math" patented technology

The invention relates to a partial-compensation aspherical reflector surface shape detection method, which comprises the following steps of demarcating partial-compensation elements to obtain demarcated phase distribution Wb; using the demarcated phase distribution Wb, sphere theory wavefront Wq and aspherical theory wavefront Wf to obtain phase distribution Wy of digital virtual sample plates; measuring an aspherical reflector surface to be measured to obtain phase distribution Wa; and reducing the phase distribution Wy from the measured phase distribution Wa to achieve surface shape error distribution Wm of the aspherical surface. The partial-compensation aspherical reflector surface shape detection method can accurately measure optical aspherical surface shapes by using a single partial-compensation element, thereby reducing design difficulty of a compensator, simplifying structure of the compensator and being clear in physical definition, simple in data processing and arithmetical operation, simple and practical in experimental operation, low in detection cost and short in test time.

The invention relates to a method for detecting a nonzero digit compensation light-degree optical non-spherical profile. The method comprises the following steps of: calculating the value of z(x, y)-s(x, y, r), wherein z(x, y) is the rise distribution of an aspheric surface along the direction of an optical axis, and s(x, y, r) is the rise distribution of a spherical surface closest to the aspheric surface to be detected along the direction of the optical axis; converting emergent parallel light of an interferometer into standard spherical waves by utilizing a transmission ball and using the standard spherical waves as reference spherical waves; adjusting the position of the aspheric surface to be detected to ensure that the circle center of the spherical surface closest to the aspheric surface to be detected coincides with a focus point of converging the reference spherical waves; detecting phase distribution data of interference fringes formed by the optical waves reflected by the aspheric surface to be detected and the reference spherical waves by utilizing the interferometer; and rejecting the value of the z(x, y)-s(x, y, r) and an adjusting and positioning error epsilon (x, y) from the phase distribution data of the interference fringes to obtain the profile error distribution e(x, y) of the aspheric surface. The invention can realize the detection of large-caliber concave and convex light-degree aspheric surface profiles with high resolution and high precision and has the advantages of low detection cost and short detection cost.

The invention provides an Akima spline fitting based look-ahead interpolation method. The method is characterized in that the Akima spline fitting is that the parameters corresponding to each interpolation point are calculated by the centripetal parameterization method, and then the data points are fitted into a smooth Akima spline by the Akima five-point interpolation method; the look-ahead interpolation is that different values are returned for real-time interpolation by the look-ahead interpolation calculation according to the processing precision requirement, the programming speed of a numerical control system and the maximum speed information; the real-time interpolation is that the real-time feeding speed is adjusted according to the look-ahead interpolation returning value, then a structural equation is created according to the known Akima spline equation and interpolation cycle and other information, then the primary iteration value of the next interpolation method is predicated, and finally the interpolation parameters are accurately calculated by the newton iteration method. According to the method, the data points to be processed are fitted through the Akima spline, so that the actuating efficiency is increased, the smoothness is high, the fitting precision is improved while the interpolation real-time performance is ensured, the accuracy and flexibility are improved, and the actual state of a workpiece can be restored to the maximum.

The invention provides a method for pressurizing and molding a composite part by using thermal expansion of silicon rubber, which applies the relations among product thickness, process gaps and thickness of a silicon rubber layer to a molding die of the composite part, and realizes molding and curing of the composite product by heating of an autoclave and a curing furnace and expansion and pressurization of the silicon rubber. Compared with the prior art, the method is suitable for different composite parts and different die materials, simultaneously meets the technical requirements of the geometric dimension of the composite part, the porosity of a laminate part, expansion pressure of the silicon rubber and the like, simplifies arithmetical operation, and contributes to designing of various molding dies of composite laminate parts, thus has extremely practical value.

The invention discloses a method for comprehensively compensating a geomagnetic vector measurement error on basis of a linear model. The method includes the steps of S1, selecting a calibration area, setting a non-magnetic plane at the center of the calibration area, packaging a triaxial magnetic sensor and an inertial navigation system in a non-magnetic side-sided box, and placing the six-sided box on the non-magnetic plane; S2, turning the six-sided box to put it on the non-magnetic plane successively with each side as a bottom face, allowing the six-sided box to rotate around a vertical axis of the non-magnetic plane under equal angular differences for M attitudes, and recording an output value of the triaxial magnetic sensor and an output value of a three-axis gyroscope in the inertial navigation system at each attitude moment; and S3, acquiring a projection vector reference value of a geomagnetic field vector in a geographic coordinate system, and solving a system of linear equations according to the output value of the triaxial magnetic sensor and the output value of the three-axis gyroscope obtained in step S2 so as to obtain model parameters, a compensated geographic coordinate system and the geomagnetic field vector under a magnetic coordinate system. M is a natural number.

The invention discloses a wave type dynamic data reconstruction method based on a singular boundary method. A wave equation time elementary solution is directly used as a kernel function, a source point intensity factor is used for replacing a source point singular item, no numerical value integrals, no singular integrals and no mesh generation are related, the wave equation time elementary solution is directly used as the kernel function, no complex mathematical manipulation exists, and the simple and efficient characters meet the feature requirements of wave type dynamic data reconstruction for quickness, stability and precision of the data reconstruction technology. Experiment comparisons show that when the technology is used for processing the wave type dynamic data reconstruction problem, under the condition of obtaining the similar precision, generally, only about 10% of time taken by a traditional linear boundary element algorithm is consumed, and the method has the advantages that the precision is high, calculation is quick, mathematics is simple, and the procedure is simple and convenient to conduct and can be applied to the engineering technical fields such as sound wave noise reduction, sea wave energy dissipation, earthquake prediction and other wave type data reconstruction and image processing.

The invention relates to the technical field of dispensing, in particular to a camera module dispensing system based on a turntable. The system comprises an acquisition module, an object module, a target module, a calculation module, a correcting module and a dispensing module. The acquisition module is used for acquiring dispensing path information according to a preset dispensing path; the object module is used for acquiring object image coordinates of object mark points in real time; the target module is used for acquiring target image coordinates of target mark points in real time; the calculation module is used for calculating the coordinate deviation amount of the object platform coordinates and the target platform coordinates under a platform coordinate system in real time; the correcting module is used for correcting the dispensing path in real time according to the coordinate deviation amount and updating the dispensing path to obtain an updated dispensing path; and the dispensing module is used for carrying out dispensing according to the updated dispensing path information. The technical problems in the prior art that the dispensing path cannot be corrected immediately in real time when the dispensing path is changed, and the deviation of the dispensing path cannot be corrected in real time are solved.

The invention provides an electronic non-stop toll collection method capable of preventing toll evasion, which can be applied to an ETC system. The method includes the following steps of: detecting the state of a vehicle entering an ETC lane; detecting the height of the vehicle entering the ETC lane and storing the height into a memory; detecting a type of the vehicle entering the ETC lane through an on-board electronic tag detector; performing vehicle determination and decision, i.e., determining the type of the vehicle entering the ETC lane according to preset height pre-determined values of various vehicle types and a detection result of a raster detector; and comparing the vehicle type of a determined result with the vehicle type detected by the on-board electronic tag detector, and deciding an intercept signal and an intervention alerting signal based on a comparison result. The invention also relates to an electronic non-stop toll collection system capable of preventing toll evasion. The method can decide the intercept signal and the intervention alerting signal based on the comparison result of the vehicle type determined by the actual vehicle height and the vehicle type detected by the ETC system rather than only electronic tag identification, and can effectively prevent toll evasion.

The unit (10) comprises a basic frame (12) with two crosswise moving carriages (18,22) one of them (22) fitted with the work-piece holding spindle (24). The machining device (28) is located opposite at the frame (12) connected to a fast tool arrangement (36,38) assembled of two parallel positioned and alternately moving shuttles. The fast tool unit (36,38) and the work-piece holding spindle (24) are positioned in an acute angle in order to compensate a possible height deviation of the cutting blades.

The application discloses an EOS-ELM-based piezoelectric driving positioning platform modeling method and system, and an EOS-ELM-based piezoelectric driving positioning platform control method. According to the application, by taking the current desired output displacement, a plurality of previous output displacements and an input driving voltage as the input values of a model, and taking the input driving voltage value of a piezoelectric driver at the current moment as an output value of the model, a hysteretic nonlinear multi-value mapping problem is solved, and a complicated model inversion process can be avoided; secondly, the weights and the threshold values between a hidden layer and an input layer are given randomly, and a conventional neural network can be transformed into a linear equation model, so that the training time of the model is shortened greatly; thirdly, an infinite differentiable function is used as a hidden layer activation function, so that an excellent training effect can be realized; additionally, just by adopting a recursive least square method, the parameter online adaptive updating can be realized, and the applicability of the model is improved; furthermore, by integrating a plurality of weak learning machines, the precision and the stability of the model can be improved.

The invention relates to an image reconstruction method and system of a medical CT machine based on Compton back scattering scanning. The method comprises the following steps: receiving back scatteredlight of X-rays emitted by an X-ray source on one side of a measured target after the X-rays pass through the measured target by a detector on the same side; performing calibration calculation basedon a Compton backscattering differential cross section algorithm to obtain a calibration coefficient; calculating to obtain a linear weakening coefficient by combining a direct proportion relation between the linear weakening coefficient and the measured target electron density; and then determining a depth correction factor by taking a transmission measurement result of the X-ray passing throughthe other side of the measured target as a reference so as to perform depth correction on the linear weakening coefficient, and reconstructing a distribution image of the linear weakening coefficientbased on coordinates after depth correction so as to realize image reconstruction. The method is based on the Compton back scattering scanning principle, scattering correction and various artifact correction are not needed, the requirement for application conditions such as environment equipment is low, mathematical calculation is simple, scanning imaging is rapid, the image quality is good, and the fidelity is high.

The application discloses an FReOS-ELM-based piezoelectric actuation type FTS modeling method and system and control method and system. According to the application, a current expected output displacement value, a plurality of previous output displacement values, and input driving voltages are used as input values of a model and an input driving voltage value of a piezoelectric ceramic actuator component at a current time is used as an output value of the model, so that a hysteresis nonlinear multi-value mapping problem is solved and a tedious model inversion process is avoided. Besides, the model is converted into a linear equation model, so that the training time of the model is shortened greatly. And the precision is improved by using an infinitely differentiable function as a hidden-layer activation function. Moreover, on the basis of the regularization idea, a proportional parameter of a risk is introduced to avoid ill-conditioned matrix generation, so that the training stability and generalization performance of the model are improved substantially; and because of introduction of a forgetting factor for online adaptive parameter updating, the operation becomes convenient, the computing loading and information overloading phenomena are avoided and the adaptability of the model is enhanced.

The present invention discloses a design method of a concrete block cooling system based on a fast and accurate numerical reconstruction technology, which takes the water pipe cooling effect in the concrete block as a negative heat source of the system, and takes the influence of cement hydration heat into account. The method comprises: configuring a plurality of test points inside and at the boundary of the inspected concrete block to obtain temperature values of the test points; establishing the equivalent control equation for the heat conduction problem, and obtaining a plurality of local low-order matrices according to the radial basis function collocation method; calculating shape parameters of the radial basis function by using the multi-scale algorithm; using the matrix sparse algorithm to construct the equation required by calculating the temperature field; calculating the temperature value of any inner point at any time; and determining the rationality of the cooling system scheme according to the maximum temperature difference between the inside and outside of the inspected structure. The method of the present invention is simple and efficient, and has the characteristicsof high precision, fast calculation, simple mathematics and a simple procedure; and the method conforms to the characteristic requirements of a fast, stable and accurate data reconstruction technology which is required in the design of the concrete block cooling system.

The invention relates to a working face hydraulic support multi-dimensional positioning system and method. The working face hydraulic support multi-dimensional positioning system comprises an inertial navigation module, a chute acceleration sensor, a stroke sensor, a hydraulic support acceleration sensor, a monitoring substation and a main control module. The inertial navigation module is used for monitoring the position of a machine head of a scraper conveyor; the chute acceleration sensor is used for monitoring the displacement of a chute relative to the machine head so as to determine the position of the chute; the stroke sensor is used for determining the position of a base of the hydraulic support according to the position of the chute; the hydraulic support acceleration sensor is used for monitoring the spatial orientation and posture of the hydraulic support; the monitoring substation is used for monitoring numerical values of the stroke sensor and the hydraulic support acceleration sensor and transmitting the numerical values to the main control module; and the main control module is used for positioning the scraper conveyor and the hydraulic support according to the data of the monitoring substation. The working face hydraulic support multi-dimensional positioning system and method is simple and easy to implement, has high accuracy and is not influenced by illumination and coal dust.

The invention provides a method for pressurizing and molding a composite part by using thermal expansion of silicon rubber, which applies the relations among product thickness, process gaps and thickness of a silicon rubber layer to a molding die of the composite part, and realizes molding and curing of the composite product by heating of an autoclave and a curing furnace and expansion and pressurization of the silicon rubber. Compared with the prior art, the method is suitable for different composite parts and different die materials, simultaneously meets the technical requirements of the geometric dimension of the composite part, the porosity of a laminate part, expansion pressure of the silicon rubber and the like, simplifies arithmetical operation, and contributes to designing of various molding dies of composite laminate parts, thus has extremely practical value.

The invention discloses a sponge city optimal layout and comprehensive benefit evaluation method, relates to the technical field of environmental engineering, and aims to solve the problems of relatively outstanding planning efficiency, poor planning accuracy and large planning effect error in existing sponge city planning. Decision variables selected by the project scientifically and reliably includea green roof area, a permeable pavement area, a concave green land area, a bioretention pond area, a grassed swale area and a rainwater garden area respectively; and the objective functions comprise an LID facility total construction cost function, a rainwater annual comprehensive runoff coefficient function and an LID system comprehensive pollutant control rate function. A decision maker can select decision schemes under different target preferences by comprehensively considering factors such as cost, water quantity and water quality according to main problems and contradictions in a transformation area, and a decision thought is provided for constructing various LID facilities according to local conditions.

The invention discloses a wave type dynamic data reconstruction method based on a singular boundary method. A wave equation time elementary solution is directly used as a kernel function, a source point intensity factor is used for replacing a source point singular item, no numerical value integrals, no singular integrals and no mesh generation are related, the wave equation time elementary solution is directly used as the kernel function, no complex mathematical manipulation exists, and the simple and efficient characters meet the feature requirements of wave type dynamic data reconstruction for quickness, stability and precision of the data reconstruction technology. Experiment comparisons show that when the technology is used for processing the wave type dynamic data reconstruction problem, under the condition of obtaining the similar precision, generally, only about 10% of time taken by a traditional linear boundary element algorithm is consumed, and the method has the advantages that the precision is high, calculation is quick, mathematics is simple, and the procedure is simple and convenient to conduct and can be applied to the engineering technical fields such as sound wave noise reduction, sea wave energy dissipation, earthquake prediction and other wave type data reconstruction and image processing.

The invention discloses a method and a device of applying a dial pad and a terminal, and belongs to the technical field of man-machine interaction. The method comprises the steps of displaying a dialing interface which includes the dial pad and a display region, wherein the dial pad comprises multiple keys; obtaining an input character sequence based on operating signals corresponding to the keys;identifying a mathematical formula which corresponds to the input character sequence; calculating the calculation result of the mathematical formula; and displaying a calculation result in the display region. According to the embodiment, the function of the dial pad is extended, the dial pad is enabled to have functions of a calculator and can carry out simple arithmetical operations, and the utilization rate of the dial pad is increased.

The invention provides a harmonic quality monitor point address selecting method for a special photovoltaic line of a power system. The method comprises the steps of calculating total harmonic distortion of each photovoltaic power access point according to a photovoltaic power capacitance parameter of the special photovoltaic line, an access position parameter and an average harmonic current parameter; and determining the position of a harmonic quality monitor point address according to the total harmonic distortion, so as to rapidly and effectively locate harmonic quality weak points in a special feeder line in a certain photovoltaic access manner. The method provided by the invention is simple and fast, prevents complex harmonic load flow calculation, and is convenient for workers without professional power system knowledge to operate and implement.

The invention relates to a method and system for measuring terrain parameters of a legged robot, comprising: calculating the unit vector of the foot end position of the supporting leg of the legged robot; calculating the normal vector of the earth relative to the world coordinate system according to the unit vector; The normal vector of the coordinate system calculates the terrain parameters. The measurement method of the present invention can calculate the terrain parameters of the terrain, including the roll angle and the attitude angle of the pitch angle, only by using the sensor information necessary for the motion control of the legged robot, which can meet the requirements of the motion control of the legged robot, and is simple and easy ,High precision.

The invention relates to the technical field of measuring devices, in particular to a measuring device and a measuring method for the diameter of a circle passing through the center of a cutter roller blade surface, which includes a part to be measured and a measuring substrate. Sliding on the measuring board is provided with an up and down sliding measuring board, sliding up and down the measuring board is provided with a left sliding measuring board and a right sliding measuring board, the lower side sliding of the up and down sliding measuring board is provided with a middle sliding measuring board, and the middle sliding measuring board passes through The middle angle sensor is rotatably connected with the main auxiliary measuring rod, and the bottom of the main auxiliary measuring rod has a middle main measuring head and a middle auxiliary measuring head; the left sliding measuring board or the right sliding measuring board slides along the left and right direction to set a side measuring board, The side measuring plate is rotatably connected with a secondary auxiliary measuring rod through a side angle sensor, and the bottom of the secondary auxiliary measuring rod has a side main measuring head and a side auxiliary measuring head. The present invention has high measurement accuracy and low cost.

The invention provides an electronic non-stop toll collection method capable of preventing toll evasion, which can be applied to an ETC system. The method includes the following steps of: detecting the state of a vehicle entering an ETC lane; detecting the height of the vehicle entering the ETC lane and storing the height into a memory; detecting a type of the vehicle entering the ETC lane through an on-board electronic tag detector; performing vehicle determination and decision, i.e., determining the type of the vehicle entering the ETC lane according to preset height pre-determined values of various vehicle types and a detection result of a raster detector; and comparing the vehicle type of a determined result with the vehicle type detected by the on-board electronic tag detector, and deciding an intercept signal and an intervention alerting signal based on a comparison result. The invention also relates to an electronic non-stop toll collection system capable of preventing toll evasion. The method can decide the intercept signal and the intervention alerting signal based on the comparison result of the vehicle type determined by the actual vehicle height and the vehicle type detected by the ETC system rather than only electronic tag identification, and can effectively prevent toll evasion.

The method for detecting the dispersion uniformity of additives in lead-acid battery negative lead paste, including the following steps: sample preparation; sample test: using thermogravimetric-differential scanning calorimetry (TG / DSC) synchronous thermal analyzer to detect the prepared samples respectively The DSC curve of the additive; the determination of the exothermic peak of the additive: through the DSC test of the additive, the DSC test of the blank control experiment of the positive raw board, the DSC test of the secondary heating of the negative raw board lead paste and the TG / DSC test, the obtained DSC curve and the measured The DSC curve of the negative raw board lead paste is compared and analyzed to determine the exothermic peak of the additive; the determined exothermic peak of the additive is normalized and integrated using the same integral curve to obtain the heat release of the additive in the lead paste per unit weight; Use mathematical tools to calculate the standard deviation S and dispersion R, and finally obtain the uniformity H of the lead paste additive; determine the best paste process. The invention can quickly and accurately measure the dispersion uniformity of the additive in the lead paste.

The invention discloses a voltage sag source identification method. The method comprises the following steps: acquiring original voltage sag waveform data; processing the original voltage sag waveformdata to obtain a voltage sag waveform data queue; and inputting the voltage sag waveform data queue into a neural network model for judgment to obtain an identification result of the original voltagesag waveform data. In the embodiment of the invention, the specific fault type of the voltage sag source can be quickly and accurately identified, and an important basis is provided for formulating avoltage sag treatment scheme and dividing responsibilities of voltage sag events.

The invention discloses a method for comprehensively compensating a geomagnetic vector measurement error on basis of a linear model. The method includes the steps of S1, selecting a calibration area, setting a non-magnetic plane at the center of the calibration area, packaging a triaxial magnetic sensor and an inertial navigation system in a non-magnetic side-sided box, and placing the six-sided box on the non-magnetic plane; S2, turning the six-sided box to put it on the non-magnetic plane successively with each side as a bottom face, allowing the six-sided box to rotate around a vertical axis of the non-magnetic plane under equal angular differences for M attitudes, and recording an output value of the triaxial magnetic sensor and an output value of a three-axis gyroscope in the inertial navigation system at each attitude moment; and S3, acquiring a projection vector reference value of a geomagnetic field vector in a geographic coordinate system, and solving a system of linear equations according to the output value of the triaxial magnetic sensor and the output value of the three-axis gyroscope obtained in step S2 so as to obtain model parameters, a compensated geographic coordinate system and the geomagnetic field vector under a magnetic coordinate system. M is a natural number.

The invention relates to the technical field of measuring devices, in particular to a device and method for measuring the diameter of a center-passing circle on the blade surface of a cutter roller; and the device comprises a to-be-measured part and a measuring substrate, a left-right sliding measuring plate is slidingly arranged on the measuring substrate, and an up-down sliding measuring plate is slidingly arranged on the left-right sliding measuring plate. The up-down sliding measuring plate is slidably provided with a left side sliding measuring plate and a right side sliding measuring plate, the lower side of the up-down sliding measuring plate is slidably provided with a middle sliding measuring plate, the middle sliding measuring plate is rotatably connected with a main auxiliary measuring rod through a middle angle sensor, and the bottom of the main auxiliary measuring rod is provided with a middle main measuring head and a middle auxiliary measuring head; a side edge measuringplate is arranged on the left side sliding measuring plate or the right side sliding measuring plate in a sliding mode in the left-right direction, the side edge measuring plate is rotationally connected with a secondary auxiliary measuring rod through a side edge angle sensor, a side edge main measuring head and a side edge auxiliary measuring head are arranged at the bottom of the secondary auxiliary measuring rod. The device is high in measuring precision and low in cost.

The invention belongs to the technical field of machining measurement, and in particular relates to a step depth measurement tool, which includes a measurement base, a first support, a second support, a measurement plate, a measurement head, a displacement sensor, a signal conditioner and a computer. The first support and The measurement base is slidingly connected, the second bracket is slidingly connected with the first bracket, the sliding direction of the second bracket is perpendicular to the sliding direction of the first bracket, one end of the measuring board is slidingly connected with the second bracket, and the sliding direction of the measuring board is perpendicular to the sliding direction of the first bracket. The sliding directions of the two brackets are perpendicular to each other, the measuring head is slidingly set at the other end of the measuring plate, the sliding direction of the measuring head is the same as that of the second bracket, and the measuring head slides close to or away from the measuring base, and the displacement sensor is fixedly arranged on the measuring base On the head; the signal conditioner is used to receive the signal transmitted by the displacement sensor, and to amplify and filter the signal, and the signal conditioner is electrically connected to the computer through the data processor.

Disclosed are an ignition system and a method for operating an ignition system for an internal combustion engine, said ignition system comprising a primary voltage generator and a step-up converter for generating an ignition spark. According to the invention, a voltage required for the ignition spark is determined, whereupon a switch-on time of the step-up converter is modified in relation to a switch-off time of the primary voltage generator.