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InactiveCN107784161AThe calculation result is accurateSolve practical application engineering problemsGeometric CADDesign optimisation/simulationSecondary developmentApplication engineering

The invention discloses an analysis method of high-speed compressible supercavity flow characteristics and belongs to the field of fluid mechanical engineering. The analysis method comprises the stepsas follows: step 1, establishing a geometric model; step 2, performing mesh division on the geometric model established in step 1 and a fluid computational domain; step 3, setting boundary conditionsand a computing method; step 4, performing secondary development through CFD software to realize compressible correction of physical attributes of water; step 5, conducting numerical computation analysis on the high-speed compressible supercavity flow characteristics; step 6, performing numerical simulation analysis and comparing a numerical simulation result with an experiment result to verify accuracy and feasibility of the analysis method. The high-speed compressible supercavity flow law and mechanism can be revealed, so that a theoretical foundation is laid for structural design of underwater high-speed navigation bodies, and the actual application engineering problems of the high-speed navigation bodies can be solved.

Owner:BEIJING INSTITUTE OF TECHNOLOGYGY

A method for determining content of uranium and organic carbon in uranium-rich hydrocarbon-source rocks comprises steps as follows: firstly, hydrocarbon-source rock core samples obtained through multi-hole drilling coring is acquired in a certain area, a radioactive uranium content value and an organic carbon content value of each hydrocarbon-source rock core are measured through an experiment, logging values of a natural gamma curve and a natural gamma-spectrum curve in logging curves, as well as resistivity, compensating sonic differential time and compensating density of the depth position of each rock core are acquired, a corresponding relation between the uranium content and the natural gamma curve as well as the natural gamma-spectrum curve is established and fitted to form a function, the corresponding relation between the organic carbon content values and related logging curve values is established and fitted to form a function, and the uranium content in each depth position and the hydrocarbon-source rock organic carbon content in each depth position in a well are determined according to the fitted function. Response of the uranium-rich hydrocarbon-source rocks in logging information is sufficiently considered, various logging information is comprehensively utilized to quantify and determine the content of uranium and organic carbon in the uranium-rich hydrocarbon-source rocks, and an obtained result is more accurate.

Owner:XI'AN PETROLEUM UNIVERSITY

InactiveCN108132134AFlexibleThe calculation result is accurateAerodynamic testingAirplaneAerodynamic derivatives

The invention, which relates to the field of aircraft model identification technology, discloses an aerodynamic derivative identification method and system based on a wind tunnel free-flying test so that the flying state of the aircraft can be simulated truly and thus an accurate aerodynamic derivative is obtained. A wind tunnel free-flying test system is arranged and is used for carrying out freedom releasing testing on an aircraft model to obtain testing data; the obtained testing data are analyzed to obtain attitude and angular velocity information of the aircraft; a corresponding dynamic model is established and unknown parameters of the model are determined; according to an output error method based on a maximum likelihood method, state quantity values being corresponding attitude angle and angular velocity values as well as attitude angle and angular velocity values obtained by testing are substituted into an objective function and a derivative, iterative calculation is carried out, the objective function is optimized continuously and thus the derivative reaches a minimum value, and the unknown parameter value is determined to be an identification result. The identification process is simple; the model precision is high; and the convenience of model parameter acquisition is improved.

Owner:NANJING UNIV OF AERONAUTICS & ASTRONAUTICS

InactiveCN101220600AReliable source of parametersThe calculation result is accurateFoundation testingSpecial data processing applicationsFoundation engineeringSoil horizon

A revised equation for tangent modulus of the foundation soil of a certain soil layer is obtained by making use of load test result which is subject to hyperbolic curve fitting. The equation is as follows: EI equals to (1-Beta bpz)<2>E0/Beta or EI equals to (1-Beta Rf/pzpu)<2>E0/Beta. Next, the revised tangent modulus of each stratified soil in different depth of the soil layer is determined according to a standard penetration test or other in situ testing the test parameters of which are assumed according to linear dependence relation; finally, the results of the nonlinearity sedimentation of large-area foundation or the base are obtained according to a layerwise summation method. The method is characterized in that the invention can make analysis of the whole process of the nonlinearity sedimentation to the limit state, the calculation principle is simple, calculation parameter source is reliable, subsidiary stress is revised according to the test result of plate loading test and the calculating result is accurate; the invention can be widely used in the design of various foundation engineering with the aim of settlement control in civil engineering field.

Owner:CHINA THREE GORGES UNIV

ActiveCN109404107AThe method is simple and feasibleThe calculation result is accurateInternal combustion piston enginesExhaust treatment electric controlTraffic volumeExhaust fumes

The invention relates to a method for estimating the carbon load of a diesel engine exhaust particle trap. The method comprises the following steps that 1) the steady-state working condition of the diesel engine is selected, and the waste gas flow of the exhaust particle trap of the diesel engine under the working condition is determined; 2) the corresponding to front-and-back pressure drop of theDPF in the idle-load and the load-limiting state under the exhaust flow is determined; 3) according to the obtained corresponding to the pressure drop value of the DPF in the idle-load and the load-limiting state under the same exhaust flow rate, and a mathematical model for calculating the carbon load of the DPF is built; 4) the actual measured DPF front-back pressure drop is substituted into the mathematical model under the exhaust flow, the carbon load value of the current DPF is calculated; and 5) the current DPF carbon load value is compared with the DPF carbon load limit value, and whether the current diesel engine exhaust particle trap state needs to be regenerated or not is judged. According to the method, the carbon loading capacity of the particle trap can be accurately estimated, the estimation result reliability is high, and the DPF can be promoted to regenerate in time.

Owner:GUANGDONG UNIV OF TECH

ActiveCN102338655AEliminate interference from contact resistanceThe calculation result is accurateLevel indicators by floatsCalculated resultElectronic control unit

The invention discloses a vehicle oil level sensor and an implementation method thereof. The vehicle oil level sensor comprises an oil tank, a slide rheostat, a first resistor, a second resistor, an ECU (electronic control unit) and an instrument, wherein the ECU comprises two analog-digital converters, a V1 sampling module, a V2 sampling module, a V1 backup module, a V2 backup module, a V1 diagnosis module, a V2 diagnosis module, two computing units, a Rm backup module, a Rm default module, a Rm diagnosis module and a filter. The invention also discloses an implementation method of the vehicle oil level sensor. By adopting the vehicle oil level sensor and the implementation method thereof provided by the invention, two voltage inputs V1 and V2 can be collected and the fuel oil volume in the oil tank can be obtained by calculation, thus interference of the contact resistance of the slide rheostat can be eliminated as much as possible and a more accurate calculated result can be obtained.

Owner:UNITED AUTOMOTIVE ELECTRONICS SYST

InactiveCN103565449AAvoid influenceThe calculation result is accurateRadiation diagnosticsX ray imageSpatial transformation

The invention discloses a spine X-ray image processing method and system. The method includes utilizing a second spine X-ray image to perform rectification on a first spine X-ray image and obtain space conversion information of the first spine X-ray image; acquiring second coordinate information of rectified predetermined points according to the space conversion information and first coordinate information at least a pair of predetermined points on the edges of a spine in the first spine X-ray image; calculating and outputting the amount of spine deformation by utilizing the second coordinate information. According to the method and device, the amount of spine deformation can be calculated automatically according to the predetermined spine X-ray images and the coordinate information of a plurality of points inside, influences on calculation results by manual operation can be reduced, and the calculation results can be more accurate.

Owner:SIEMENS AG

InactiveCN106874534APredicted Life LossThe calculation result is accurateDesign optimisation/simulationNeural learning methodsAssessment methodsThermal circuit

The invention provides an assessing method for an overload capacity of a transformer. A first model which is used for treating and acquiring a hot spot temperature of the transformer is formed in advance and a second mode which is used for treating and acquiring forecast overload time of the transformer is formed in advance. The assessing method comprises the following steps: acquiring the hot spot temperature of the transformer according to the treatment of the first model; acquiring the forecast overload time of the transformer according to the treatment of the second model; acquiring the forecast life loss of the transformer by treating according to the hot spot temperature and the forecast overload time; assessing the overload capacity of the transformer according to the forecast life loss; simultaneously executing the step S1 and step S2. The invention has the beneficial effects: various factors which influence the overload running of the transformer are collected, a thermal circuit model is established, the BP neural network training is adopted, the hot spot temperature of the transformer at present is calculated and the safety time of the overload running of the transformer is calculated, so that the life loss of the transformer can be forecast, the calculation result is more accurate and the calculation method is more reliable and has higher practical application value.

Owner:STATE GRID EAST INNER MONGOLIA ELECTRIC POWER CO LTD MAINTENANCE BRANCH +2

InactiveCN103778322ASure easyThe calculation result is accurateSpecial data processing applicationsPress brakeControl theory

The invention discloses a method for controlling the depth of a sliding block of an upper die of a bending machine. When the method is used, only the thickness t of a plate to be bent, elasticity modulus E, ultimate strength sigma b, a nominal opening V of a lower die, the V-shaped angle beta of a V-shaped groove of the lower die and the radius r1 of a fillet at an opening of the V-shaped groove of the lower die need to be given, and then the value of the depth h of the upper die corresponding to the bending angle alpha1 which is expected to be obtained after random resilience can be calculated directly through a formula; next, the sliding block of the upper die is pressed downwards to the position, at the depth h, of the upper die, and the bent plate is taken out. When bending is conducted according to the method, the error between the finally obtained bending angle and a target bending angle is quite small. The method is simple, effective, high in accuracy, independent of experience of workers, and broad in prospect of large-range industrial application. As a result, there is no need to rely on overseas imported equipment any more, and a large amount of capital is saved.

Owner:SOUTHEAST UNIV

InactiveCN108107319AThe calculation result is accurateThe principle is simpleFault location by conductor typesReal time acquisitionEmbedded system

The invention discloses a multi-end flexible DC power grid fault positioning method and system. The method comprises steps: positive and negative current traveling wave signals at two ends of a DC transmission line are acquired in real time; wavelet transform modulus maxima of the positive and negative current traveling waves of the DC line after fault is calculated; validity test is carried out on the wavelet transform modulus maxima data; fault electrode recognition based on a current traveling wave wavelet transform modulus maxima difference is carried out; fault line recognition based on atwo-end current traveling wave wavelet transform modulus maxima symbol difference is carried out; and an accurate fault position is solved. The simulation analysis shows that in various fault conditions, a fault electrode and a fault line can be correctly recognized, the fault position can be accurately calculated, the sensitivity is high, the reliability is high, and besides, a positioning device in a local end only needs to transmit symbol and sampling time information of the wavelet transform modulus maxima to the opposite end, and requirements on communication are not high.

Owner:SHANDONG UNIV +2

The invention relates to the technical field of sprayed coating performance and quality evaluation, and especially relates to a fractal dimension obtaining method of coating surface morphology. The method comprises the following steps of: 1) carrying out cleaning processing on a sample; 2) carrying out scanning on the sample and obtaining a coating surface three-dimensional morphology image based on peak and valley actual heights; and 3) adopting a projection covering method to calculate fractal dimensions of the coating surface morphology. According to the invention, calculation is carried out on the three-dimensional data of the coating surface morphology, omission is prevented, a more visual integral evaluation of the actual morphology of a coating is realized, and the method can better reflect the actual characteristics of the coating than a two-dimensional method.

Owner:ACADEMY OF ARMORED FORCES ENG PLA

ActiveCN106033888AThe calculation result is accurateReduce manual calculation intensityElectrical testingAc network circuit arrangementsOnline evaluationPower grid

The invention provides an online evaluation method for the safety control amount of an AC line fault based on the speed-down DC sensitivity. The method comprises the following steps that whether offline data is calculated for the first time or the operation state of an AC line is changed is determined, if YES, the offline data is updated, and otherwise, the offline data is not changed; the overload quantity of a key AC line is determined; and the speed-down DC safety control amount is calculated, and a limited AC line is determined. According to the method, a safety control measure for an N-2 fault of primary and secondary sectional lines of a DC converter station can be calculated online automatically rapidly, a calculation result is accurate, the intensity of manual calculation can be reduced greatly, the working efficiency of power-grid staff is improved, and the method is suitable for a reception-end AC system which has a problem in trend evacuation due to limitation of heat stability of near-area lines after large-capacity DC is fed in.

Owner:STATE GRID CORP OF CHINA +2

PendingCN107016203AThe calculation result is accurateGeometric CADDesign optimisation/simulationMesh generationPhotovoltaics

The invention discloses a photovoltaic water pump internal flow numerical simulation method. The process includes the steps that three-dimensional modeling and mesh generation are conducted in an internal calculation area of a photovoltaic water pump, a mesh file is imported into Fluent, and initial conditions and boundary conditions are set; a simulation model of a photovoltaic battery panel, a simulation model of a controller and a simulation model of a motor are built by means of Matlab/Simulink, and the rotation speed of the pump is calculated in real time; data exchange between software is achieved by combining a user-defined function (UDF) of Fluent and an M function of Simulink; the photovoltaic water pump internal flow is calculated through Fluent, and the rotation speed and inlet boundary conditions are updated in real time in the solving process according to simulation results of Simulink. The method can be used for numerical simulation of internal flow of the photovoltaic water pump according to actual operation conditions of the photovoltaic water pump, accordingly numerical calculation results are more precise, and finally correct theoretical bases can be provided for design of the photovoltaic water pump.

Owner:JIANGSU UNIV

ActiveCN104735717ARealize reasonable configurationThe calculation result is accurateWireless communicationAllocation methodCorrelation coefficient

The invention provides a cell PCI (peripheral component interconnect) allocation method and a cell PCI allocation system. The method includes: analyzing cell closeness according to neighboring measurement data and switchover data to acquire correlation coefficients of co-frequency cells, distributing cell PCI values for many times according to the correlation coefficients of the co-frequency cells, accurately calculating disturbance values, adjusting cell PCI distribution values for many times to form various different PCI planning schemes, respectively calculating a whole-network total disturbance value in each scheme, selecting an updated scheme with the lowest disturbance value to carry out convergence determination, and carrying out cell PCI allocation according to the updated cell PCI planning scheme during convergence determination, so that reasonable allocation of cell PCI values is realized.

Owner:GUANGDONG HAIGE ICREATE TECHNOLOGY CO LTD

ActiveCN107451359AThe calculation result is accurateReduce mistakesGeometric CADDesign optimisation/simulationResearch resultMatrix cracking

The invention relates to a finite element analysis method based on influences of matrix cracks for gear engagement features. The method includes the steps of obtaining basic parameters of gear pairs of a driving gear and driven gears and crack parameters of matrix crack gears; according to the basic parameters of the gear pairs, building a three-dimensional finite element model of a well functioning gear, incising a gear matrix to generate a finite element gear model containing matrix cracks; conducting mesh refinement on the crack surfaces, and creating a surface-to-surface contact unit Conta 174 and a surface-to-surface contact unit Targe 170 on the crack surfaces under the interaction among the crack surfaces; according to the crack parameters, calculating the gear engagement features and the difference between the calculation results, wherein the difference is resulted from whether or not the contact units are created on the crack surfaces. The finite element method based on the influences of the matrix cracks for the gear engagement features can make the calculation results of engagement stiffness and tooth root strain of the crack gears more accurate and is conducive to understanding of interaction between engagement features of non-penetrable matrix crack gears and crack surfaces, and the researching results can provide certain reference for gear design.

Owner:NORTHEASTERN UNIV

InactiveCN105136250AEliminate interference from contact resistanceThe calculation result is accurateLevel indicators by floatsFuel oilFuel tank

The invention discloses an oil level detection device and detection method for a fuel oil tank. The oil level detection device for the fuel oil tank comprises the fuel oil tank, a slide rheostat, a first resistor, a second resistor, an ECU and a meter; a floater floats on the surface of fuel oil in the fuel oil tank and is connected with a slide sheet of the slide rheostat, one end of the slide rheostat is connected with voltage V through the first resistor connected in series, the slide sheet of the slide rheostat is grounded through a second resistor connected in parallel, the end, connected with the first resistor in series, of the slide rheostat is connected to the ECU and outputs the voltage V1, the other end of the slide rheostat is connected to the ECU and outputs the voltage V2, and the meter is connected to the output end of the ECU. According to an oil level sensor used for a car and the implementation method thereof, two ways of the voltage V1 and V2 are collected and input, the fuel oil capacity in the fuel oil tank is obtained through calculation, the interference of contact resistance of the slide rheostat is eliminated, and the more accurate calculation result can be obtained.

Owner:SUZHOU TAFU ELECTRONICS TECH CO LTD

ActiveCN110108864AThe calculation result is accurateEfficient calculation methodAnalysing solids using sonic/ultrasonic/infrasonic wavesMaterial testing goodsElastic modulusPrestressed concrete beam

The present invention belongs to the technical field of non-destructive testing of concrete beams, and discloses a non-destructive testing system and method for pre-stressed concrete beams. The non-destructive testing system comprises: a pre-stress acquisition module, a strength detecting module, an anti-seepage detecting module, a main control module, a crack resistance testing module, and a pre-stress simulation module, a data storage module, and a display module. The method is characterized in that: identification and intelligent analysis are performed on the strength of the concrete through the strength detecting module, and the strength of the concrete structure can be accurately determined; and the pre-stressed tendon and the concrete unit are separately established by the pre-stresssimulation module, so that only specifying the pre-stressing force, the cross section area, the linear expansion coefficient and the elasticity modulus of the pre-stressed tendon can calculate the cooling value applied to the pre-stressed tendon. According to the method provided by the present invention, the actual effect of the pre-stressed tendon is considered, and the pre-stressing effect canbe effectively simulated; and in the complex pre-stressed concrete structure, only the cooling value of the pre-stressed tendon needs to be calculated, and the calculation result is accurate and the calculation method is efficient.

Owner:HUNAN CITY UNIV

ActiveCN105243728AThe calculation result is accurateReduce algorithm difficultyPaper-money testing devicesEngineeringFrequency characteristic

The invention discloses a method and system for calculating the thickness of paper money. The method includes the following steps that: the height position of an induction sheet of a sensor and a frequency characteristic value corresponding to the height position are obtained, and a reference data table is established according to a corresponding relationship between the height position and the frequency characteristic value; a frequency characteristic value when no paper money exists is obtained, so that the height position of the induction sheet in a no-paper money state can be obtained; a frequency characteristic value when paper money passes is obtained, so that the height position of the induction sheet when the paper money passes can be obtained; and the thickness of the paper money can be calculated according to the height position of the induction sheet in the no-paper money state and the height position of the induction sheet when the paper money passes. According to the method and system of the invention, the reference data table is established according to the corresponding relationship between the height position and the frequency characteristic value; the height position of the induction sheet in the no-paper money state and the height position of the induction sheet when the paper money passes can be obtained through searching the table; and therefore, the thickness of the paper money can be calculated. The method and system have the advantages of more accurate calculation result, low algorithm difficulty and short computing time.

Owner:SHENZHEN YIHUA COMP +2

ActiveCN102779363AHigh degree of automationThe calculation result is accurateTicket-issuing apparatusGeographic information systemEngineering

The invention discloses a method for calculating road bridge cost. The method includes: capturing a vehicle running track through a global positioning system (GPS) vehicle-mounted terminal; combining a geographic information system (GIS) map and the vehicle running track and judging if a vehicle passes through a toll station, on yes judgment, executing next step, otherwise returning to last step; combining the GIS map to obtain a toll station charging standard; and calculating the road bridge cost in real time. The invention further discloses a system for calculating the road bridge cost. The system comprises the GPS vehicle-mounted terminal, a data processing module and a GIS. By recording the running track on the GIS map and analyzing road bridge toll stations passed by the vehicle on the GIS map by combining the GIS map, the road bridge cost is calculated automatically. The automation is high, calculating results are precise, and the system can provide real-time road bridge cost for vehicle owners. The method and the system for calculating the road bridge cost are convenient and accurate and can be widely applied to daily life.

Owner:广州亿程交通信息有限公司

InactiveCN107761307ASave electricityThe calculation result is accurateControl devices for washing apparatusTextiles and paperProcess engineeringElectricity

The invention discloses an electricity use control and monitoring method of a washing machine. The electricity use control and monitoring method comprises the following steps of executing a washing program by the washing machine, and detecting a clothing load amount m; after the washing machine finishes washing, obtaining the working time t1 of a motor; calculating the electricity consumption of the washing machine by the washing machine according to a formula of that W is equal to tha sum of the Wmotor and W0, wherein Wmotor is equal to k*P1*t1; k is a correction coefficient; k is in direct proportion to m; P1 is the rated power of the motor; W0 is the preset value of an electric component of the washing machine. According to the monitoring, by the electricity use control and monitoring method, of the electricity consumption of the washing machine, the monitoring is carried out mainly aiming at the electricity consumption of the main working device-motor in a washing process; by combining the characteristic of the washing process of the washing machine, a formula of calculating the electricity consumption of the motor is given out; in consideration of a main factor influencing theworking of the motor, the formula is corrected, so as to obtain a more accurate calculation result; therefore, an electricity consumption calculation method of the electricity use control and monitoring method is more accurate for the calculation result of the electricity consumption of the motor and the calculation of the electricity consumption of the washing machine is fundamentally ensured tobe in an error-tolerant range.

Owner:江苏小沐科技有限公司

InactiveCN106059585AThe output is safeThe calculation result is accurateAnalogue-digital convertersComputer science

The invention discloses a data sampling method. The data sampling method includes the following steps that: S1, data are sampled through a sensor, so that sampling data can be obtained; S2, the sampling data are sent to a first processing unit, so that the first processing unit can carry out calculation to obtain a first result, at the same time, the sampling data is sent to a second processing unit, so that the second processing unit can carry out calculation to obtain a second result, the first processing unit and the second processing unit carry out the same calculation processing on the sampling data; and S3, whether the first result and the second result are identical is verified, if the first result and the second result are identical, the first result is correctly outputted to a communication bus. The invention also discloses a corresponding sampling system. The sampling system comprises a sensor, an A/D conversion unit and a calibration output module which are connected with one another sequentially. The data sampling method and the sampling system of the invention can verify results, automatically identify wrong data and ensure the safety and correctness of output data. The data sampling method and the sampling system of the invention have the advantages of multi-redundancy performance, high stability, flexibility in expansion, convenience and high integration.

Owner:ZHUZHOU CSR TIMES ELECTRIC CO LTD

PendingCN111309025AFast operationThe calculation result is accuratePosition/course control in two dimensionsAcoustic wave reradiationData transmissionObstacle avoidance

The invention relates to a method for measuring the moving speed of a dynamic obstacle by a mobile robot in an unknown environment. A computer and a mobile robot system controlled by a single-chip microcomputer are used. An ultrasonic generator of the mobile robot system emits multiple groups of pairwise continuous ultrasonic waves to the same obstacle in front at a certain frequency and speed; the time of the ultrasonic wave from emission to reception is obtained through two echo signals in each group, and a distance between an obstacle and the mobile robot and the moving speed and directionof the obstacle in the echo information time are calculated; pairwise information fusion calculation is carried out on the multiple groups of information; the moving speed and direction of the dynamicobstacle are accurately calculated; the mobile robot system transmits the obtained information and calculation data to a computer for data filtering, analysis and calculation; finally, a more accurate measurement result is obtained and fed back to the mobile robot system, so that the purpose of autonomous obstacle avoidance moving control is achieved. The method is high in calculation speed, accurate in result, low in system manufacturing cost and convenient to apply and popularize.

Owner:UNIV OF SHANGHAI FOR SCI & TECH

InactiveCN106022573AEliminate subjective factorsThe calculation result is accurateResourcesMultiple dimensionEnvironment of Albania

The present invention provides a multi-dimensional hotel scoring method, which includes the steps of obtaining multi-dimensional data of the hotel, performing score calculations for the hotel to be evaluated in the dimensions of facilities, location, price, sound insulation, and catering, and obtaining the scores under each dimension. And the steps of calculating the comprehensive score of the hotel through the scores of each dimension. From the point of view of guest concerns, the present invention provides a standardized scoring method for comprehensive evaluation combined with guest concern elements, not only examining the hotel's own software and hardware conditions, but also examining various conditions of the hotel's environment, and the evaluation factors are comprehensive , and the evaluation method is relatively objective.

Owner:南京世途猫信息技术有限公司

InactiveCN103364595AThe calculation result is accurateThe calculation process is simpleScanning probe microscopyCalculated resultChemistry

The invention discloses a method for representing the phase separation degree of polymer solar cell photosensitive layers. The method comprises the first step of respectively representing the photosensitive layers of a plurality of polymer solar cell samples prepared under different conditions through an AFM to obtain photosensitive layer AFM phase diagrams, the second step of selecting an interest region with a certain size from the phase diagrams respectively, the third step of blackening and whitening the interest regions to convert a donor D and a receptor A inside each interest region into a black phase and a white phase, and the fourth step of calculating the lengths of the contacted boundaries of the donors and the receptors inside the blackened and whitened interest regions respectively and quantitatively analyzing and comparing the phase separation degree of the photosensitive layers of the polymer solar cell samples according to the calculated result. The calculating method is simple, the calculated result is reliable, and the study on factors influencing the phase separation of the photosensitive layers, optimization on D/A two-phase separation scale and improvement on the performance of a cell are facilitated.

Owner:INST OF SEMICONDUCTORS - CHINESE ACAD OF SCI

InactiveCN103536302AThe calculation result is accurateImprove comparabilityRadiation diagnosticsDensity distributionTomography

The invention discloses a three-dimensional dose distribution difference analyzing method and system based on a TPS. The method includes performing computerized tomography on a human body, obtaining a computerized tomography image of the human body, and further acquiring human body three-dimensional density distribution information; computing and acquiring simulated three-dimensional dose distribution information according to virtual radiation parameters and preset dose values; controlling a medical accelerator to perform irradiation experiments to acquire measured radiation field flux information, and computing to acquire measured three-dimensional dose distribution information; comparing the simulated three-dimensional dose distribution information and the measured three-dimensional dose distribution information, marking spatial locations that difference values are larger than preset thresholds, and further producing a difference statistical table. The problems that a used uniform phantom is different with a realistic human body in density distribution are solved effectively, and computing results are more accurate; spatial locations with high difference degree are marked, the difference statistical table is produced, and accordingly researchers can grasp specific situations more intuitively and easily; the three-dimensional dose distribution difference analyzing method is widely applicable to the field of radiotherapy.

Owner:CANCER CENT OF GUANGZHOU MEDICAL UNIV

InactiveCN104331535AThe calculation result is accurateLow insertion lossSpecial data processing applicationsPhysicsDielectric substrate

The invention discloses a V waveband microstrip probe type waveguide microstrip switching circuit. The circuit comprises a rectangular waveguide (1), a dielectric substrate (2), a microstrip probe (3), a quarter impedance conversion line (4) and a 50 ohm microstrip transmission line (5), wherein the microstrip probe (3), the quarter impedance conversion line (4) and the 50 ohm microstrip transmission line (5) are arranged on the dielectric substrate (2), the bottom surface of the dielectric substrate (2) is welded on the rectangular waveguide (1), the thickness of the dielectric substrate (2) is 5 mil, and the bottom surface on the dielectric substrate (2), on which the microstrip probe (3) is, is made of an insulated material. According to the design of the switching circuit, non-dominant mode model radiation of a microwave signal in transmission in the rectangular waveguide is fully taken into account, and the switching circuit also combines the latest three-dimensional electromagnetic field simulation software, so that the computing result is more precise, and the manufacture of circuit boards can be better instructed.

Owner:HUADONG PHOTOELECTRIC TECHN INST OF ANHUI PROVINCE

InactiveCN110647212AThe calculation result is accurateDigital data processing detailsInput/output processes for data processingEngineeringMechanical engineering

The invention discloses a method and device for determining a folding angle, electronic equipment and a storage medium. The method comprises the steps that a first included angle, detected by a firstacceleration sensor, between a first display screen and a horizontal line and a second included angle, detected by a second acceleration sensor, between a second display screen and the horizontal linein the same direction are acquired; and calculating and determining the folding angle of the folding screen based on the first included angle and the second included angle. According to the invention, the first included angle between the first display screen and the horizontal line detected by the first acceleration sensor is obtained; the second included angle between the second display screen and the horizontal line in the same direction is detected by the second acceleration sensor; therefore, the folding angle of the folding screen can be finally calculated and determined based on the angle relation between the first included angle and the second included angle, the method has the advantages of being free of external environment interference and rapid and accurate in calculation result, and the problem that in the prior art, the calculation result of the folding angle is inaccurate due to external interference is solved.

Owner:HUAQIN TECH CO LTD

InactiveCN105186440AThe calculation result is accurateEmergency protective arrangements for automatic disconnectionPower gridModel parameters

The invention discloses a relaying protection fixed value setting method based on an electromechanical transient method. The relaying protection fixed value setting method comprises the following steps: (1) acquiring data from a relaying protection setting software database and establishing positive-sequence, negative-sequence and zero-sequence algebraic equations of a power network; (2) combining electromechanical transient model parameters and solving simultaneous algebraic equation and a nonlinear equation by using an electromechanical transient simulation method to obtain dynamic process data of each status variable of a system in a fault process and after faults disappear; and (3) calculating a relaying protection fixed value according to the dynamic process information of each status variable in the step (2). With the adoption of the relaying protection fixed value setting method, the accuracy of a short-circuit calculation result can be improved, so that the accuracy of the fixed value calculation in a protection fixed value setting process is improved.

Owner:NR ELECTRIC CO LTD

ActiveCN105277212AThe calculation result is accurateWide applicabilityNavigation by speed/acceleration measurementsDynamic couplingMoment of inertia

The present invention provides a second-order dynamic disturbance torque compensation method of a triaxial inertial stabilization platform system, the method comprises the following steps: 1, measuring or calculating rotational inertia of the triaxial inertial stabilization platform system; 2, measuring to obtain internal relative rotation angle and angular velocity of the triaxial inertial stabilization platform system, and rotational speed of platform body relative to the inertial system; 3, calculating platform body synthetic second-order dynamic disturbance torque of the triaxial inertial stabilization platform system; and 4, converting to calculate motor torque of a motor for disturbance torque compensation, and achieving disturbance torque compensation by the motor torque; the second-order dynamic disturbance torque calculating method is clearly shown by the method, compensation is achieved according to the calculated results, suppression of dynamic coupling errors the presence of angular motion of a vector can be facilitated, and the using accuracy of the triaxial inertial stabilization platform system can be improved.

Owner:BEIJING INST OF AEROSPACE CONTROL DEVICES

ActiveCN105090084AThe calculation result is accurateAccurate monitoringPump controlNon-positive displacement fluid enginesDatabase serverPersonal computer

The invention provides a draught fan online monitoring system and method. The system comprises a temperature sensor, a negative pressure sensor, an electric power meter device, an industrial personal computer, a displayer and a database server. The temperature sensor and the negative pressure sensor are arranged on an inlet of a draught fan. Measured data can be used for calculating energy consumption of the draught fan. The energy consumption of the inlet condition of the draught fan is considered more accurately compared with the prior art. When the system is used for energy consumption measurement before and after energy-saving transformation and energy-saving condition calculation, calculation results are more accurate. The industrial personal computer and the displayer are adopted for centralized processing and monitoring of the data, the draught fan can be accurately monitored in real time, and therefore on the basis that the accurate data can be acquired, an operator can find and process deviation correspondingly in time when actual data deviate greatly.

Owner:SHANGHAI BAOSTEEL ENERGY TECH

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