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171results about How to "Eliminate inaccuracies" patented technology

Statistically based estimate of embedded software execution time

A statistical approach to estimating software execution times is implemented by preparing a model of a target processing device, correlating the software to be estimated to benchmark programs used in the preparation of the model, and then applying the software to be estimated to the model. The model is developed by determining the actual execution times of the benchmark programs, determining a number of virtual instructions in the benchmark programs and determining a predictor equation that correlates the virtual instructions to the actual execution time. The predictor equation is determined by a linear regression technique that includes a correlation analysis of the virtual instructions, removal of highly correlated instructions, and a combination of stepwise linear regression and multiple linear regression to determine the predictor equation.
Owner:CADENCE DESIGN SYST INC

Optical fiber refractive index and temperature sensor and measurement method thereof

The invention discloses an optical fiber refractive index and temperature sensor and a measurement method thereof. The optical fiber refractive index and temperature sensor comprises a broadband light source (1), an optical fiber sensing head (2), a spectrometer (3) and a computer (4), wherein the broadband light source (1) is connected to a first input port of the optical fiber sensing head (2) through an optical fiber; a first output port of the optical fiber sensing head (2) is connected with the spectrometer through an optical fiber. According to the measurement method, two light beams split in a Mach-Zehnder interferometer interfere with each other, the movements of the valley value wavelength and the Bragg wavelength of an interference fringe change with the refractive index or the temperature of a material to be measured where the optical fiber sensing head is positioned, the movement ranges of the valley value wavelength and the Bragg wavelength of the interference fringe are measured through the spectrometer, and the refractive index and the temperature of the material to be measured are obtained through calculation of the computer. The optical fiber refractive index and temperature sensor is capable of measuring the refractive index and the temperature in high-precision and real-time ways at the same time and is simple in structure and convenient to operate.
Owner:SOUTH CHINA NORMAL UNIVERSITY

Fault diagnosis method by combining correlation analysis and data fusion

The invention discloses a fault diagnosis method by combining correlation analysis and data fusion, and is used for solving the technical problem of low fault diagnosis result precision of the existing fault diagnosis method. The fault diagnosis method has the technical scheme that equipment information from different measuring sources is extracted; multi-source information and same-source information corresponding to the existing fault mode are subjected to correlation analysis; the obtained correlation degree is used as a correlation coefficient between the existing fault mode and the multi-source data measured in a fault to be diagnosed; the information of a plurality of sources is synthesized by a data fusion method; the reliability, belonging to the existing fault mode, of the fault to be diagnosed is calculated; the fault mode corresponding to the maximum reliability is selected from the reliability. The method of replacing the correlation coefficient in the multi-source data fusion process by the grey correlation degree between the single physical quantity in the process of the fault to be diagnosed and the same physical quantity in the existing fault type is adopted, so that the single physical quantity and the multi-information fusion processes are effectively linked, and the precision of the fault diagnosis result is improved.
Owner:NORTHWESTERN POLYTECHNICAL UNIV +1

Arrangement for Weighing Transport Vehicle Load

A method for weighing a payload of a transport vehicle, a transport vehicle and a bogie structure. Vertical loads exerted on wheel suspension of the transport vehicle are measured with sensors and the measurement data is conveyed to a calculating unit of weighing. Further, on a side surface of a horizontal arm belonging to the bogie structure there is arranged a sensor for measuring the vertical load exerted on the horizontal arm.
Owner:SANDVIK MINING & CONSTR OY

Method for correcting hole sites on basis of framework scanning measurement

ActiveCN103895877AEliminate inaccuraciesSolve the problem of unpredictable marginsAircraft assemblyPoint cloudComputer science
The invention provides a method for correcting hole sites on the basis of framework scanning measurement. The method for correcting the hole sites includes computing rotation matrixes and translation vectors according to actual point cloud data and theoretical models of frameworks; correcting theoretical hole sites on the frameworks by the aid of the rotation matrixes and the translation vectors to obtain corrected hole sites; determining boundary lines of the various corrected hole sites; utilizing distances from the centers of the corrected hole sites to the boundary lines as corrected hole drilling edge distances. The method has the advantages that the problem of difficulty in measuring edge distances of closed structures can be solved; integral procedures are implemented on the basis of digitalization, accordingly, manual measurement can be omitted, and technological processes can be simplified; the problem of hole site inaccuracy due to the fact that hole sites are manually corrected after involution is performed by the aid of an existing method can be solved, and the automatic hole drilling precision can be guaranteed; the hole sites are firstly corrected before the hole drilling edge distances are determined, and the corrected hole sites can be acquired, so that hole site inaccuracy due to deformation, positioning and coordination can be eliminated, and the automatic hole drilling precision can be guaranteed.
Owner:ZHEJIANG UNIV

Multi-source modeling and collaborative analysis method for electricity stealing behavior

ActiveCN104331846AImprove the accuracy of electricity consumption monitoringReduce the false detection rate of stealing electricityData processing applicationsElectricityElectric power system
The invention discloses a multi-source modeling and collaborative analysis method for electricity stealing behavior. The multi-source modeling and collaborative analysis method for the electricity stealing behavior includes steps that 1, acquiring data; 2, pre-processing the data; 3, dividing the pre-processed data, and using the divided data as different types of historical consumption behavior of a user; 4, acquiring the current historical data of the user; 5, monitoring the abnormal electricity consumption based on the historical electricity consumption data of the user; 6, collaboratively monitoring the abnormal electricity consumption based on the historical water consumption data of the user; 7, collaboratively monitoring the abnormal electricity consumption based on the historical fuel gas consumption data of the user; 8, collaboratively monitoring the abnormal electricity consumption based on the historical communication consumption data of the user; 9, calculating the comprehensive abnormal electricity consumption monitoring value and judging suspicious users. The multi-source modeling and collaborative analysis method for the electricity stealing behavior is capable of monitoring the electricity stealing behavior of the user at the power supply end, improving the electricity consumption monitoring precision, duly feeding back the possible electricity stealing behavior and lowering the false electricity stealing behavior detecting rate so as to guarantee the normal running of the electric system.
Owner:STATE GRID CORP OF CHINA +2
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