43results about How to "Shorten the evaluation cycle" patented technology

The invention discloses a design method of bolts for engine crankshaft bushings, which relates to the technical field of an engine. The crankshaft bushing comprises a bearing seat, a bearing end cap and a bushing body, wherein the bearing end cap is buckled with the bearing seat to form a bearing hole, the bushing body is arranged in the bearing hole, and the bushing body comprises an upper bushing and a lower bushing which are in snap fit. The method comprises the following steps: S1, building a two-dimensional finite element simulation model of a crankshaft bushing; S2, carrying out two-dimensional finite element simulation calculation; S3, calculating the pretightening force Fv required for each bolt; S4, selecting bolts; S5, carrying out three-dimensional finite element simulation calculation; S6, judging the accuracy of the bolt type selection in step S4. According to the parameters of different crankshaft bushings, the design method can give the size of bolts as a reference and shorten the design and evaluation cycle, and has strong practicability.

The invention discloses a magnetic resonance imaging simulating method for irrelevant movement in a myocardial microcirculation perfusion voxel, and belongs to the field of magnetic resonance imaging computer simulating. The method solves the problems that an in vivo experiment qualitative evaluation method cannot precisely quantize the detection effect, and a traditional simulating experiment quantitative evaluation method is large in evaluation difficulty, high in evaluation cost and long in evaluation period. The simulating method comprises the steps that firstly, a network avoidance algorithm, a boundary avoidance algorithm and a fluid branch constraint algorithm are utilized for building a virtual myocardial microcirculation network model; secondly, a blood perfusion model in a blood vessel and a water molecule diffusion movement model outside the blood vessel are built; thirdly, on the basis of the diffusion magnetic resonance imaging principle, an IVIM MRI mechanism is simulated, and a magnetic resonance fading signal is generated; fourthly, nonlinear fitting is performed on the fading signal, and the simulating detection result of the myocardial microcirculation perfusion model is obtained. The method can provide the reliable simulation quantitative evaluation conclusion.

The invention discloses a risk assessment method and device for an electro-thermal coupled multi-energy flow system, and the method comprises the steps: establishing a stochastic model of the operation of the electro-thermal coupled multi-energy flow system, generating sn stochastic scenes of the electro-thermal coupled multi-energy flow system according to the stochastic model, and simultaneouslyestablishing constraint conditions and a cost function of the electro-thermal coupled multi-energy flow system, taking the cost function as a target function, wherein the constraint conditions include a heat network flow constraint condition, so that the coupling relation between the active power of the heat network and the active power of the grid can be established. Therefore, the minimum valueof the target function of the electro-thermal coupled multi-energy flow system under the sn stochastic scenes can be calculated through the electro-thermal coupling constraint condition of the electro-thermal coupled multi-energy flow system, and the risk value of the electro-thermal coupled multi-energy flow system is determined according to the minimum value of the target function correspondingto the sn stochastic scenes, thereby enabling the solved risk value of the electro-thermal coupled multi-energy flow system to be more accurate.

The invention discloses an artificial neural network-based LRU Cache prefetching mechanism performance gain assessment method. The method comprises the following steps of: selecting a neural network training parameter to fit an access stack distance distribution before the import of a prefetching mechanism and a Cache access missing frequency after the import of the prefetching mechanism, so as toconstruct a neural network model; calculating a target stack distance distribution of target programs; importing the calculated target stack distance distribution into the constructed neural model soas to predict Cache access missing frequencies of different target programs under the current prefetching mechanism; and calculating a Cache access missing frequency before the import of the prefetching mechanism by utilizing the stack distance distribution, and comparing the predicted Cache access missing frequencies under the current prefetching mechanism with the Cache access missing frequencybefore the import of the prefetching mechanism so as to assess performance gain of the prefetching mechanism. According to the method, the speed of predicting the performance gains of Cache prefetching mechanisms can be greatly enhanced.

The invention discloses a machining center knife magazine manipulator reliability testing method based on an onsite load characteristic. The method comprises the three steps of onsite data acquisition, a data processing process and laboratory reliability testing. The data processing process comprises the following six steps of calculation of average knife switching frequency alpha of a knife magazine manipulator and an average fault interval knife switching frequency MTBFn in an actual condition, establishment of a statistical distribution model of a cutterhead/cutter chamber insertion total weight Mi, determination of an average knife insertion number V(Zj) during each weight grade reliability test of a cutterhead/cutter chamber, establishment of a knife insertion distribution model of the cutterhead/cutter chamber at each weight grade, calculation of parameters of counterweight blocks selected for the tests and calculation of the knife switching frequency of each counterweight block during the tests. Through performing a laboratory reliability test on the machining center knife magazine manipulator by use of the method, the method can effectively shorten the assessment period of the knife magazine manipulator and improve the assessment precision.

The invention provides a population attraction estimation method and device, equipment and a readable medium. The method comprises the following steps: obtaining the influx quantity of the resident population during a preset time period in a target area based on the number of resident mobile equipment in the target area; and estimating the population attraction index of the target area based on the influx quantity of the resident population during the preset time period in each of referenced areas and the influx quantity of the resident population during the preset time period in the target area. The technical proposal of the invention makes up for the shortage of the prior art and is to realize estimation of the population attraction index of the target area based on the number of the resident mobile equipment in the target area. In comparison with the prior art, estimation of the population attraction index is realized only by detecting and analyzing data without manual collection of data, so as to relatively reduce the operation cost, dramatically decrease estimation cycle and effectively improve estimation efficiency for population attraction.

The invention provides a cylindrical array wave force amplitude fluctuation characteristic, step length and envelope line obtaining method. The method includes: establishing a coordinate system for acylinder array consisting of limited bottom-supported cylinders arranged in a straight line, and determining relevant parameters; analyzing the interference effect of diffracted waves of any cylinderand upstream and downstream cylinders thereof based on a long cancellation theory, obtaining a description model of a wave incident angle equal to zero and unequal to zero fluctuation spacing, the fluctuation spacing and an expression of peak and valley point horizontal coordinates, and determining a calculation step length of a wave force amplitude curve and a peak and valley point vertical coordinate; And connecting the peak/valley points to obtain an upper/lower envelope line of the wave force curve in the non-capture region. The invention further provides a method for establishing the waveforce amplitude curve fluctuation interval description model based on the diffraction theory. It is proved that the fluctuation interval is only related to the total number of cylinders in the cylinder array, the cylinder number for marking the cylinder position and the wave incident angle, the workload can be reduced on the premise that the precision is guaranteed, and the design and evaluationperiod is shortened.

The invention provides a description model of fluctuation intervals of wave force amplitudes of a cylindrical array in a non-capture area, comprising the following steps: listing the velocity potential of water wave diffraction near any cylinder, the diffraction coefficient being determined by a linear equation set; Solving the linear equation set by adopting a Claimer rule to obtain a target square matrix determinant; Ignoring the quantity slowly changing along with the wave number in the square expression of the determinant model to obtain a target expression; Solving a first derivative of the expression and enabling the first derivative to be equal to zero to obtain a transcendental equation; And deducing a fluctuation interval expression of any cylindrical wave force amplitude curve byusing a transcendental equation, and performing synthesizing to obtain a description model of the non-capture region. The method has the advantages that the fluctuation interval of the wave force amplitude curve in the non-capture area is not changed along with the change of the dimensionless wave number and is only related to the total number of cylinders in the cylinder array, the number of thecolumns marking the positions of the cylinders and the wave incident angle, and accurate prediction can be realized by the aid of a formula provided by the invention.

The invention provides a method for determining a calculation step length and an envelope line of a cylindrical array wave force amplitude curve. The method includes: establishing a coordinate systemfor a cylinder array consisting of limited bottom-supported cylinders and arranged in a straight line, and determining relevant parameters; analyzing the interference effect of diffraction waves of any cylinder and upstream and downstream cylinders thereof on the basis of a constructive cancellation theory, obtaining a description model of a wave incident angle equal to zero and unequal to zero fluctuation spacing, the fluctuation spacing and an expression of peak point and valley point horizontal coordinates, and then determining a calculation step length of each area and peak point and valley point vertical coordinates; And connecting the peak points/valley points to obtain upper/lower envelope lines of the wave force curve in the non-capture area. It is proved that the fluctuation interval is only related to the total number of cylinders in the cylinder array, the cylinder number for marking the cylinder position and the wave incident angle, the workload can be reduced on the premise that the precision is guaranteed, and the design and evaluation period is shortened.

The invention belongs to the technical field of shock isolation in structural engineering, and discloses a sliding material friction performance evaluating method for bridge and building shock isolation devices. The method comprises the following steps: S1, getting the initial parameters of an evaluated material; S2, detecting the vertical pressure performance of the evaluated material; S3, detecting the maximum horizontal friction under a non-seismic condition; S4, carrying out friction characteristic test; and S5, carrying out long-range friction test. Vertical pressure test is added before friction test, and whether the pressure capacity of the evaluated material meets the design requirement is judged first, so that the evaluation period is shortened effectively, and the detection efficiency is improved. The influence of pressure capacity, movement rate and temperature on the friction coefficient is considered, and the stability of the long-range friction coefficient is monitored. Based on the detection results, the friction performance of the evaluated material can be evaluated more comprehensively. A scientific and reliable way of evaluation is provided for the development and type selection of sliding materials for bridge and building shock isolation devices.

The invention discloses a project workload assessment method and device, and relates to the field of artificial intelligence. A specific embodiment of the method comprises the steps of obtaining a to-be-evaluated project according to a project workload evaluation request, identifying a business demand corresponding to the to-be-evaluated project, and obtaining one or more business functions contained in the to-be-evaluated project; classifying the one or more service functions, and determining existing service functions and newly added service functions in the one or more service functions; based on a machine learning algorithm, calculating the workload of the existing business function, and evaluating the workload of the newly added business function according to the business function evaluation template; and determining the workload of the to-be-evaluated project according to the workload of the existing business function and the workload of the newly added business function. According to the embodiment, the workload evaluation efficiency can be improved, the workload evaluation period can be shortened, the waste of human resources can be reduced, and the accuracy of workload evaluation can be improved due to the application of a machine learning algorithm.

The invention provides a method and a system for evaluating the high-voltage ride through capability of a wind turbine generator variable pitch system. The method comprises the following steps: carrying out data auditing on the voltage endurance capability of related components in the variable pitch system, judging whether the working time of the related components is not less than threshold timeunder the condition that the voltage endurance capability is not less than the threshold voltage, if so, carrying out the next step, and if not, judging that the evaluation is unqualified, and terminating the evaluation; performing interactive signal checking on the variable pitch system under the condition that the voltage is not less than the threshold voltage, judging whether a normal interactive signal can be generated or not, if so, performing the next step, and if not, determining that the evaluation is unqualified and terminating the evaluation; performing a high-voltage ride through performance platform test on the variable pitch system, judging whether feathering or abnormal working conditions occur in the test process, if so, evaluating to be unqualified, and if not, evaluating to be qualified. According to the method, the high-voltage ride through capability of the wind turbine generator pitch system is comprehensively evaluated through data auditing and factory testing, manpower and material resources are saved, the evaluation period is shortened, and the evaluation result is good in credibility.

The invention provides a charging gun wire connection part strength evaluation method, which comprises the following steps: constructing an implicit static analysis model of a charging gun wire connection part without a gun wire through simulation software, calculating a deformation result of a contact area of a bolt head and a pile body under the condition of applying a bolt pre-tightening force, and extracting a deformed bolt grid model; constructing an explicit dynamics analysis model of a charging gun wire connection part including the gun wire through simulation software, deleting a bolt structure, and importing the deformed bolt grid model; moving the imported deformed bolt grid model by a preset distance along the direction opposite to the pre-tightening force direction of the bolt so as to start assembly; applying forced displacement to the imported deformed bolt grid model, and simulating application of pre-tightening force, so that a bolt connecting hoop clamps the gun wire into a clamping groove in the pile body shell; and performing deflection operation on the end part of the gun wire by taking the charging gun wire connection part as a deflection center, and performing strength evaluation according to a strain result of the charging gun wire connection part.

The invention provides a description model of a cylindrical array wave force amplitude fluctuation interval based on construction and destruction. Analyzing the wave path difference of two paths of diffraction generated when incident waves are transmitted to any cylinder and diffraction generated when incident waves are transmitted to an array farthest-end cylinder at the upstream or downstream ofthe cylinder based on a wave construction and destruction interference theory, so as to obtain a preliminary fluctuation interval expression; And then, analyzing the comprehensive effect of diffraction waves of cylinders at upstream and downstream of the cylinder, correcting an initial fluctuation interval expression, and performing synthesizing to obtain a final expression and a description model of the fluctuation interval of the wave force amplitude curve of any cylinder. The fluctuation interval of the wave force amplitude curve in the non-capture area is not changed along with the changeof the dimensionless wave number and is only related to the total number of cylinders in the cylinder array, the number of the columns marking the positions of the cylinders and the wave incident angle, and accurate prediction can be realized by the aid of a formula provided by the invention.

The invention provides a method for determining a calculation step length of a cylindrical array wave force curve based on construction and destruction. The method comprises the following steps: establishing a cylindrical array coordinate system consisting of limited identical bottom-supported cylinders and arranged in a straight line, and determining related parameters; analyzing conditions of left-turn diffracted waves and right-turn diffracted waves of cylinders when the wave incident angle is equal to zero and not equal to zero, and obtaining a final expression of a wave force curve of anycylinder in the non-capture area to describe a model; And determining the calculation step length of each region on the basis of the calculation step length. According to the prediction formula, theworkload can be reduced on the premise that the precision is ensured; According to the calculation step length determination method, an accurate wave force curve can be obtained on the premise that unnecessary calculation time is not blindly increased.

The invention discloses a method for evaluating filamentous corrosion resistance of an aluminum wheel finish turning surface, and belongs to the technical field of automobile surface protection. The method comprises the following steps: 1) carrying out a stone impact test; 2) performing a neutral salt spray test; 3) measuring the expanding width K1 of the finish turning surface of the aluminum wheel for the first time; 4) performing a copper accelerated acetate mist test; 5) measuring the expanding width K2 of the finish turning surface of the aluminum wheel for the second time. Through the evaluation method designed by the invention and in combination with after-sales exploration, when the thickness of a paint film on the edge of the finish turning surface of the aluminum wheel is more than or equal to 30 microns, the expansion widths K1 and K2 of the finish turning surface of the aluminum wheel obtained by the evaluation method designed by the invention are less than or equal to 1.5mm, and the filiform corrosion phenomenon of the finish turning surface of the aluminum wheel is not found after sales; therefore, the evaluation method designed by the invention has good guidance suggestions for the production and after-sales service of the aluminum wheel.

The invention relates to a battery module health state assessment method and device, electronic equipment and a medium. The assessment method comprises the following steps: acquiring capacity attenuation characteristic curves of different groups of battery cell modules in corresponding capacity intervals; determining capacity attenuation rates corresponding to the different groups of battery cell modules according to the capacity attenuation characteristic curves corresponding to the different groups of battery cell modules; obtaining a capacity attenuation characteristic curve of the battery module corresponding to the battery cell module with the fastest capacity attenuation rate; and determining the health state of the battery module according to the capacity attenuation characteristic curve of the battery module. The evaluation efficiency of the health state of the battery module is improved.

The invention relates to the technical field of batteries, and discloses a method for evaluating the mechanical property of a lithium battery foil, which comprises the following steps: providing a battery cell group comprising a plurality of battery cells, a pole piece of each battery cell comprises a to-be-evaluated foil and an active material coating layer coated on the surface of the to-be-evaluated foil, and the outer surface of the active material coating layer is also coated with a thermal expansion material coating layer; the battery cell group is baked within a preset temperature range, and the baking temperatures of the battery cells are different, so that the thermal expansion material coating layers of the battery cells are expanded to different states; and obtaining the pole piece state of each battery cell, and evaluating the mechanical property of the to-be-evaluated foil according to the pole piece state. According to the embodiment of the invention, not only is the actual use scene of the foil simulated, so that the actual test requirement can be met, but also the baking process is adopted to replace the conventional charging and discharging process, the pole piece state under different expansion rates can be obtained in a short time, the evaluation period is greatly shortened, and the occupation of test resources is reduced.