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97results about How to "The calculation result is accurate" patented technology

Method for determining content of uranium and organic carbon in uranium-rich hydrocarbon-source rocks

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

Aerodynamic derivative identification method and system based on wind tunnel free-flying test

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

Method for estimating carbon load of diesel engine exhaust particle trap

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

Assessing method for overload capacity of transformer

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

Finite element analysis method based on influences of matrix cracks for gear engagement features

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

Non-destructive testing system and method for pre-stressed concrete beams

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

Method and system for calculating thickness of paper money

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

Electricity use control and monitoring method of washing machine

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

Data sampling method and sampling system

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

Method for measuring moving speed of dynamic obstacle by mobile robot in unknown environment

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

Method for representing phase separation degree of polymer solar cell photosensitive layers

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

Three-dimensional dose distribution difference analyzing method and system based on TPS

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

Folding angle determination method and device, electronic equipment and storage medium

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
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