71results about How to "Fix calculation inaccuracies" patented technology

The invention discloses an obtaining method and device of the charge state of a battery. The obtaining method comprises the steps of obtaining the work state of the battery, determining an estimation method used for estimating the charge state of the battery according to the work state of the battery and calculating the charge state values of the battery in different work states according to the estimation method. According to the obtaining method and device, the problem that calculation of the charge state of the battery is inaccurate in the prior art is solved, and the accuracy of calculating the charge state of the battery is improved.

The invention provides an all wheel individual drive electric car traction control method and device; the control method comprises the following steps: obtaining a tyre pressure parameter of each wheel, calculating a wheel diameter correction factor of each wheel according to the tyre pressure parameter of each wheel; calculating tyre wheel speed of each wheel according to the wheel diameter correction factor of each wheel; calculating the whole vehicle speed according to the tyre wheel speed of each wheel, if the electric car is under a driving condition, using the minimum value of the tyre wheel speed of each wheel to calculate the whole vehicle speed, if the electric car is in a braking condition, using the maximum value of the tyre wheel speed of each wheel to calculate the whole vehicle speed; using the tyre wheel speed of each wheel and the whole vehicle speed to calculate a slippage rate of each wheel; carrying out traction control at least according to the whole vehicle speed and / or the slippage rate of each wheel. The method can solve the problems that the slippage rate and the whole vehicle speed are inaccurate in calculation, thus realizing traction control of the whole vehicle.

The invention provides a vehicle-mounted road surface longitudinal gradient real-time identification method and device, and belongs to the technical field of vehicles. The existing problem that a gradient value cannot be calculated accurately under all working conditions is solved. The vehicle-mounted road surface longitudinal gradient real-time identification method includes the following steps that a steady-state gradient calculation module looks up a table to obtain a steady-state gradient value according to the difference between a vehicle-mounted longitudinal acceleration signal and actual acceleration; a dynamic gradient calculation module calculates a dynamic gradient value according to a vehicle-mounted longitudinal acceleration signal and the actual acceleration; a gradient correction module corrects the dynamic gradient value calculated by the dynamic calculation module according to the steady-state gradient value calculated by the steady-state gradient calculation module to obtain a corrected gradient value; according to the current working condition information transmitted by a driving condition judging module , a control module judges whether the steady-state gradient value calculated by the steady-state gradient calculation module is adopted or the corrected gradient value corrected by the gradient correction module is adopted. According to the vehicle-mounted road surface longitudinal gradient real-time identification method and device, the accuracy of calculating the gradient value under the full working conditions can be realized.

The invention relates to an optimal design method for structural parameters of cylindrical linear motors, belongs to the field of electromechanical intellectualization, and is motor parameter optical design technology. The method comprises the following steps: under the condition of meeting a structural parameter restriction range, dynamically sampling the structural parameters; analyzing thrust and undulating values of the cylindrical linear motors with different structural parameters by a finite element analysis method; taking the structural parameters as input of a neural network and the thrust and the undulating values as output of the neural network, and fitting functional relations of the structural parameters, the thrust and the undulation by the neural network; and finally optimizing the structural parameters to be optimized by combining an intelligent optimization method to obtain satisfying thrust and undulation performance in unit volume of a motor. The method is easy for engineered application, and can avoid inaccurate concentrated parameter calculation caused by complex magnetic circuits of the motor, difficult parameter optimization caused by the intercoupling of the parameters and the like. The technology can be also used for optimal design of structural parameters of motors with any structure.

The invention provides a paralleling-reactor sound-shield sound reduction measuring method and device. The method includes: measuring first sound intensity level located at the first default distance of a paralleling reactor and calculating sound power level of the paralleling reactor according to the measured first sound intensity level; mounting a sound shield on the paralleling reactor, measuring second sound intensity level at the first default distance of the sound shield and calculating sound power level according to the measured second sound intensity level; determining difference value of the calculated sound power level of the paralleling reactor and the sound power level of the sound shield to be sound reduction of the paralleling-reactor sound shield. The sound reduction is calculated through measurement of the sound intensity levels, sound intensity which is a vector and has directionality is less prone to interference of outer environment, the measured sound intensity is more accurate and reliable, and accuracy in calculation of the sound reduction is improved.

The invention provides an EGR rate calculating method and system with a low-pressure EGR system and a vehicle. The method comprises the following steps: the concentration of oxygen entering an EGR intercooler is detected; a theoretical EGR rate is obtained according to the concentration of oxygen in air, the concentration of oxygen when a normal combustion equivalence ratio is 1 and the concentration of oxygen entering the EGR intercooler; EGR rate correcting coefficients corresponding to a present temperature of air entering an engine are obtained; and a final EGR rate is obtained according to the theoretical EGR rate and the EGR rate correcting coefficients, so that an oil injecting quantity is determined according to the final EGR rate. The method can precisely control the oil injectingquantity, improves the combustion performance of the engine, and reduces the oil consumption and the emission.

The invention relates to a vehicle orientation detection method and system based on a multi-task convolutional neural network. The vehicle orientation detection method based on the multi-task convolutional neural network comprises the following steps: establishing a mature multi-stage multi-task convolutional neural network model; acquiring a real-time RGB image of a front vehicle, and inputting the real-time RGB image of the front vehicle into the multi-stage multi-task convolutional neural network model to obtain a real-time vehicle position, a real-time vehicle type, a real-time wheel position and real-time wheel and ground intersection position information of the front vehicle; optimizing the real-time wheel position and the real-time wheel and ground intersection position information,and obtaining the real-time vehicle orientation angle of the front vehicle through the real-time wheel and ground intersection position information. According to the method and system, the problems that the 3D detection frame of the preceding vehicle cannot be trained through deep learning and TTC calculation is inaccurate due to lack of preceding vehicle orientation information when the TTC is calculated by utilizing the pixel width change of the vehicle can be solved.

The invention discloses a method for computing sequence components under the frequency changing situation. The method comprises the following steps of (1) sampling the electric quantity on the secondary side of a voltage or current transformer of a protected object through a relay protection device or an automatic safety device, and using the inter-phase short-window frequency measurement algorithm to obtain the current frequency of the electric quantity, and (2) computing the positive-sequence component, the negative-sequence component and the zero-sequence component of the electric quantity according to the current frequency, obtained in the step (1), of the electric quantity. According to the computing method, the computing accuracy of the sequences during frequency changing can be improved.

The invention relates to the technical field of data processing, in particular to a shareholder penetration-based specified enterprise derivative affiliation analysis method and system, and the methodcomprises the steps: collecting and storing information data of each to-be-analyzed enterprise, and obtaining original information data which comprises shareholder information data; upwards divergingeach to-be-analyzed enterprise according to the original information data to calculate a shareholder link proportion, and determining all shareholders of each to-be-analyzed enterprise, the all shareholders including a final shareholder; retrieving an associated to-be-analyzed enterprise related to the final shareholder to generate first derivative information data related to the final shareholder; combining the first parcel information data to generate final parcel information data; the shareholder information is collected, stored and analyzed, so that the upward divergence of each to-be-analyzed enterprise is calculated, and the shareholder link proportion is calculated. Enterprises to be analyzed are subjected to final shareholder-based set division, and support is provided for enterprise association analysis.

An embodiment of the invention discloses a computing method and device of a sounding reference signal channel coefficient matrix. The method includes: acquiring an SRS (sounding reference signal) frequency-domain signal sequence which an i-th receiving antenna receives from time-frequency resources occupied by a j-th port of UE (user equipment); multiplying a conjugate of an original SRS sequence transmitted by the j-th port, by the SRS frequency-domain signal sequence to obtain a noise-containing frequency-domain channel coefficient sequence; expanding the noise-containing frequency-domain channel coefficient sequence; performing inverse discrete Fourier transform to obtain a noise-containing time-domain channel coefficient sequence; subjecting the noise-containing time-domain channel coefficient sequence to windowing and denoising; subjecting the denoised time-domain channel coefficient sequence to discrete Fourier transform to obtain a frequency-domain channel coefficient sequence; linearly combining front N values from the frequency-domain channel coefficient sequence to obtain an SRS channel coefficient of the i-th receiving antenna, corresponding to the j-th port of the UE.

The invention provides a tracking duration determination method and device, a storage medium and an electronic device. The method comprises the steps of determining an identifier of a first tracking object located in a target area, tracking duration of tracking the first tracking object and shooting time of the Nth frame of image in an Nth frame of image obtained by performing video monitoring on the target area; determining that a first tracking object does not exist in the target area in the M-th frame of image obtained by performing video monitoring on the target area; determining an identifier of a second tracking object appearing in the target area and the shooting time of the O-th frame image in the O-th frame image obtained by performing video monitoring on the target area; and under the condition that the first tracking object is matched with the second tracking object, determining the tracking duration for tracking the second tracking object in the O-th frame image as a second duration. According to the method and the device, the problem of inaccurate calculation of the tracking time length of the undetected object is solved, and the effect of accurately determining the tracking time length is achieved.

The invention discloses a propeller design method based on a genetic algorithm. The method comprises the following steps: firstly, presetting initial speed V0; determining value range of initial parameters of a propeller; constructing a genome population; carrying out cavitation checking on the genome population to eliminate / reform genomes not according with requirements; calculating propeller efficiency of genomes; carrying out evolution and elimination on the genome population until a preset evolution times are reached; outputting and selecting highest efficient propeller design parameters,and calculating corresponding speed; and finally, judging, according to the speed, whether optimization is continued. According to the method, an optimization design of the genetic algorithm is employed, limitation that in the prior art, mutual influences in changes among all parameters need to be considered and thus adjustment is continuously carried out for obtaining optimum propeller efficiencyis overcome, and design efficiency of the propeller is improved; and compared with a set of optimal parameters only obtained by using a graph design manner, a set of multi-solution optimization parameter schemes finally obtained by the method more facilitate selection and determination of an optimal propeller design scheme.

The invention discloses a transformer substation field operation safety early warning method, and the method comprises a data acquisition module, a data processing module and a field early warning module; the data acquisition module acquires point cloud data in a transformer substation through three-dimensional laser scanning equipment, and acquires real-time picture data in the transformer substation through digital camera equipment; the data processing module is used for processing the point cloud data and the monitoring image data respectively, comprehensively analyzing the point cloud dataand the monitoring image data and outputting the positions and behaviors of objects in the transformer substation, thereby judging whether violation contents occur or not and generating early warningin time; and the on-site early warning module receives the early warning data, generates on-site early warning and displays the on-site early warning in the three-dimensional model. The method has the characteristics of modularization, high accuracy, wide detection area, comprehensive supervision and informatization of field operation data of the transformer substation.

The invention discloses an information prediction method based on deep learning, and the method comprises the steps: obtaining LBS information; inputting the LBS information into a clustering model toobtain a first basic feature; converting the first basic feature to obtain a second basic feature; determining a plurality of target grids from the plurality of POI grids; obtaining TF-IDF features and POI category distinguishing features of a plurality of POI categories of the target grid; mapping the plurality of dotting positions to each target grid, and obtaining dotting features; clusteringthe plurality of dotting positions to obtain a plurality of resident points, mapping the plurality of resident points to a plurality of target grids, and obtaining resident point POI features; fusingthe TF-IDF feature, the POI category distinguishing feature, the dotting feature and the resident point POI feature, and obtaining a position interest point feature; and inputting the second basic features and the position interest point features into a pre-trained model to obtain an information prediction result. The invention also provides related equipment. According to the invention, the prediction accuracy of the LBS information based on the user can be improved.

The invention discloses a multi-motor integrated controller support capacitor capacity calculating method comprising the following steps: a relation between rated reactive power and frequency of a motor rated line current provided by a support capacitor is used, an expression, including support capacitor capacity as a parameter, for a voltage fluctuation peak-to-peak value [delta]U1 indicating motor frequency multiplication times is obtained; a relation between active power provided by the support capacitor and switch frequency of a multi-motor integrated controller is used, an expression, including the support capacitor capacity as a parameter, for a voltage fluctuation peak-to-peak value [delta]U2 indicating switch frequency multiplication is obtained; the support capacitor capacity is calculated based on a relation between a busbar voltage peak-to-peak value and [delta]U1 and [delta]U2 as well as a limit value of the busbar voltage peak-to-peak value. Via the method disclosed in theinvention, calculation of key parameters of the capacitor can be optimized, and negative influence exerted by capacitor parameters on a system can be lowered; requirement of a motor driving system for capacity, parasitic inductance and rated voltage of the capacitor can be calculated accurately.

The invention discloses an electrical phasor measuring method and device adapting to a frequency conversion process. The method comprises the steps: (1) a protective apparatus acquires secondary side voltages and currents of a voltage transformer and / or a current transformer by means of a fixed sampling frequency, and detects the voltage and current signal frequency fe through a frequency measurement algorithm; (2) the length N of a data window is determined according to the sampling frequency and the current voltage and current frequency, and new N data values are obtained in the current data window through an interpolation method, wherein the time interval of every two adjacent data points in the new N data values is shown in the description; and (3) phasor calculation is conducted on the N data values through a phasor algorithm, and then the phasors of voltages and currents are obtained. The invention also provides a device utilizing the above method. The electrical phasor measuring method and device help to solve the problem of great phasor calculation errors when the electrical signal frequency significantly deviates from a rated frequency value.

The invention discloses self-service plastic bottle exchange currency fund recovery equipment. The equipment comprises an equipment shell. The top or the upper portion of the recovery equipment is provided with a plastic bottle input port and the plastic bottle input port is connected to a bottle inlet channel. The side surface of the lower portion of the bottle inlet channel is provided with a counting identification system. The lower portion of the counting identification system is provided with a first storage box body. The internal portion of the box body of the first storage box is provided with a first compression device. A first obstruction door is arranged between the counting identification area of a plastic bottle and the first storage box body. The lower portion of the first storage box body is provided with a second storage box body. A second obstruction door is arranged between the first storage box body and the second storage box body. In the prior art, plastic bottle quantity calculation is not accurate. In the invention, the above problem is solved, the plastic bottles can be rapidly used to exchange a currency fund and enthusiasm for recycling the plastic bottles is actively mobilized so as to realize convenient and fast palm operation. The size of the equipment is small, recovery efficiency is high and cost is saved.

The invention discloses an aircraft combined navigation method and device. The method comprises: reading a measurement quantity and an input quantity at a current flight moment from an onboard measurement element in a period dt, and carrying out recording; acquiring a state quantity and an input quantity which are recorded by an aircraft at a previous flight moment; according to the state quantity and the input quantity which are recorded at the previous flight moment and a process model, determining a predicted state quantity of the aircraft at the current moment; according to the predicted state quantity, the input quantity at the current moment and a measurement model, determining a predicted measurement quantity of the aircraft at the current moment; according to the predicted measurement quantity, the read measurement quantity at the current flight moment, process noise and measurement noise, carrying out data processing, and according to a result of the data processing and the predicted state quantity, determining a state quantity of the aircraft at the current flight moment, and carrying out recording. According to the scheme, accurate calculation on a flight state of the aircraft is implemented.

The invention provides a visual accurate target tracking system and method.The visual accurate target tracking system comprises a video data unit, a target detection unit, a distance calculation unit, a motion trend calculation unit and a judgment unit, and the distance calculation unit comprises a first position information operation module, a second position information operation module, and a distance comprehensive operation module which solves the problem of inaccurate visual target tracking calculation through a mode of jointly calculating distance calculation and a motion trend track so that accuracy of target tracking is improved. The distance calculation unit can quickly and accurately calculate the distance between the two targets. The method comprises the following steps: acquiring a plurality of original targets and a plurality of tracking targets, and calculating distances between the original targets and the tracking targets to obtain a plurality of tracking distances; and presetting a tracking distance threshold value, and judging whether the original target and the tracking target are the same target according to the tracking distance and the tracking distance threshold value or according to the motion trend track of the original target.

The invention discloses a combined optimization problem processing method and a combined optimization problem processing device. The method for processing the combinatorial optimization problem comprises the following steps of: when a calculation termination condition is not met, respectively providing initial solutions corresponding to calculation tasks for a plurality of calculation units; receiving solutions obtained by executing the calculation task by a plurality of calculation units according to the initial solutions; clustering on the solutions, and obtaining a clustered solution cluster; and determining a final solution from the clustered solution cluster after determining that a calculation termination condition is satisfied. According to the combined optimization problem processing method provided by the embodiment of the invention, the same combined optimization problem can be searched in parallel by utilizing a plurality of search strategies, and the solving advantages of different search strategies for a certain type of problem are fully exerted, so that a better solution can be quickly obtained.

The invention discloses a generator stator ground fault positioning method. The method comprises the following steps: reading a generator terminal three-phase voltage vector from a fault recorder; calculating a zero-sequence voltage vector of the generator; determining a fault phase; calculating the advance angle of the zero-sequence voltage vector advance fault phase voltage vector of the generator; calculating a feature vector angle of the generator; when the advance angle is smaller than the feature vector angle, the ground fault occurs outside the generator; when the advance angle is equalto the feature vector angle, the ground fault occurs at the machine end; and when the advance angle is larger than the feature vector angle, the ground fault is located in the generator, and the ratio of the number of windings from the ground fault to the generator end to the number of windings from a generator neutral point can be calculated. The method has the advantages that the ground transition resistance does not need to be measured when the method is used for positioning the generator stator ground fault; according to the method, little fault information is needed for positioning the generator stator ground fault, the calculation process is simple, the calculation amount is small, and the method is easy to use on site.

The invention discloses a lamp panel punching die of an automobile headlamp. The punching die further comprises a supporting plate, a left punch needle assembly, a right punch needle assembly and an automatic driving device, wherein the supporting plate is arranged in the middle of the upper end of an upper die plate; the left punch needle assembly and the right punch needle assembly are both movably arranged on the upper die plate, the left punch needle assembly comprises a hitting rod and a left punch needle which are connected with each other, the right punch needle assembly comprises a hitting rod and a right punch needle which are connected with each other, and the left punch needle and the right punch needle are located at the left side and the right side of the supporting plate respectively; and the automatic driving device is arranged on the upper die plate and used for driving the left punch needle assembly and the right punch needle assembly to punch holes in a workpiece on the supporting plate. According to the lamp panel punching die of the automobile headlamp, under the driving of the automatic driving device, the left punch needle assembly and the right punch needle assembly are driven to punch holes in the workpiece on the supporting plate, a manual punching mode is replaced, time and labor are saved, and the working efficiency of the punching die is improved.

The invention provides a method, device and system for calculating the session duration. By acquiring a target session, the behavior object of the last web page access behavior in the target session is determined, and the duration of the target session is determined according to the terminal behavior object. It can be seen that the behavior object of the last web page visit behavior affects the duration of the target session. For example, if the behavior object of the last web page visit behavior is the behavior object that generates page view data, the page view time of the last web page visit behavior is determined and the page view time is calculated into the session duration. When the behavior object of the last page visit behavior is the behavior object that does not generate page view data, the duration of the target session is determined to be the start time of the last page visit behavior-the starting time of the initial web page accessing behavior, so that there is no need toobtain the page browsing time of the last web page accessing behavior, and the problem of inaccurate calculation of the session duration caused by a single session duration calculation method in the prior art is solved.

The invention provides a method and a device for determining a user perception rate, relates to the technical field of communication, and solves the problem of inaccurate calculation of the user perception rate. The method comprises the following steps: acquiring service data of a base station in a preset time period, wherein the preset time period comprises at least one time slot, the service data comprises a data packet of each service request in the at least one service request, and the data packet of each service request is transmitted through the at least one time slot; determining the transmission duration of the service data, wherein the transmission duration comprises the actual duration occupied by the data packet of each service request during the transmission of the last time slot; and determining the user perception rate of the base station in the preset time period according to the transmission duration of the service data and the total data volume of the service data.

The invention discloses an uplink power control calculation method and device, relates to the field of wireless communication, and is used for uplink power control calculation. The uplink power control calculation method comprises the steps that network equipment acquires base station receiving antenna diversity gain, base station transmitting antenna beamforming gain, terminal receiving antenna diversity gain and terminal transmitting antenna beamforming gain; the network equipment calculates an uplink and downlink antenna system gain difference delta G according to the base station receivingantenna diversity gain, the base station transmitting antenna beamforming gain, the terminal receiving antenna diversity gain and the terminal transmitting antenna beamforming gain; the network device sends the uplink and downlink antenna system gain difference delta G to the terminal device; the terminal equipment receives the uplink and downlink antenna system gain difference delta G sent by the network equipment; and the terminal equipment calculates uplink power control according to the uplink and downlink antenna system gain difference delta G. The embodiment of the invention is appliedto uplink power control calculation.

The invention relates to the field of financial platform risk analysis, in particular to an equity financing platform risk judgment method and system, and the method comprises the steps: setting a risk index system for judging an equity financing platform, a risk item, and a risk judgment standard corresponding to the risk item; analyzing the stock equity financing platform needing risk judgment to obtain a first index corresponding to the risk item, judging whether the first index hits the risk judgment standard or not, and setting a risk mark for the first index according to the judgment; setting a risk model formula, and calculating the risk marking line according to the risk model formula to obtain a marking result; formulating a risk level model according to the risk index system, comparing a marking result with the risk level model, and outputting an actual risk level. The risk index system composed of the risk item risk judgment standard and the risk marks well solves the problem that risk judgment of an existing stock equity financing platform is unreliable and incomplete, and the comprehensive and targeted technical effect is achieved.

The invention relates to the technical field of engines, and provides a high-pressure oil pump top dead center position self-learning method and a rail pressure control method. The method comprises the following steps: executing the following self-learning process: setting an initial oil pump top dead center position at a first position corresponding to a set angle before a theoretical bottom dead center; reducing the oil pump top dead center position from the first position, so that the pressure regulating valve moves towards the oil pump bottom dead center direction in the opening duration until the rail pressure corresponding to the high-pressure oil way is equal to the pressure in the low-pressure oil way, and the oil pump top dead center position at the moment is recorded as the oil pump bottom dead center position; and the recorded oil pump bottom dead center position and the angle corresponding to the oil pumping stroke are added, and the final oil pump top dead center position is obtained. According to the method, the more accurate oil pump top dead center position can be obtained, and more accurate rail pressure control can be achieved conveniently.

The invention discloses an oil leakage preventive type roots flowmeter. The oil leakage preventive type roots flowmeter comprises a casing, a rotor, a rubber sleeve, a propping ring, a valve and a torsion spring, wherein a gland is arranged on the left side of the casing, the rotor is arranged in the gland in a penetration manner, the outer side of the rotor is rotationally connected with the gland through a bearing, an oil leakage preventive assembly is arranged on the outer side of the rotor in a sleeving manner and on the right side of the bearing and comprises the rubber sleeve and the propping ring, the propping ring is arranged on the inner side of the rubber sleeve, the right side of the propping ring is fixedly connected with the gland, and the inner edge part of the left side of the rubber sleeve is connected with the inner edge part of the right side of the bearing. The left end part of the propping ring is propped against the inner end part of the rubber sleeve, so that thelower end of the left side of the rubber sleeve is propped against the inner edge part of the right side of the bearing, the upper end part of the propping ring is propped against the side wall of therubber sleeve, the outer side of the rubber sleeve is enabled to be tightly attached to the gland, so that a path of lubricating oil leaking into the casing is closed, leakage of the lubricating oilis prevented effectively, and service life of the oil leakage preventive type roots flowmeter is prolonged.

The invention discloses a method for determining the popularization conversion rate, a server and a computer readable storage medium. The method comprises the steps of when a mobile terminal scans a two-dimensional code provided by a preset location, obtaining first user information corresponding to the mobile terminal according to the two-dimensional code; matching the first user information withsecond user information obtained by the mobile terminal through scanning a two-dimensional code provided by a different channel; and determining the popularization conversion rate of the channel according to a matching result. Different two-dimensional codes can be displayed to the users for scanning in different channels, and the users are enabled to scan the two-dimensional code at the preset location so as to calculate the popularization conversion rate, thereby solving a problem of inaccurate information calculation of the popularization conversion rate at present.