Results 251 to 260 of about 333,618 (298)

OFDM Radar Range Accuracy Enhancement Using Fractional Fourier Transformation and Phase Analysis Techniques

IEEE Sensors Journal, 2020
Orthogonal Frequency Division Multiplexing (OFDM) technique is obtained significant attention in radar applications for its interference resilience property.
Jianguo Li, Sining An, Jianping An
exaly   +3 more sources

The Coordinate Transformation Method and Accuracy Analysis in GPS Measurement

Procedia Environmental Sciences, 2012
This paper introduced WGS-84 and BJ-54 coordinate transformation model and the influence comparison from geodetic elevation between seven-parameter model and three-parameter model, and finished transformation parameters calculation and accuracy analysis ...
Debao Yuan, Sheng-Yao Wang
exaly   +2 more sources

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On improving the accuracy of the Hough transform

Machine Vision and Applications, 1990
The subject of this paper is very high precision parameter estimation using the Hough transform. We identify various problems that adversely affect the accuracy of the Hough transform and propose a new, high accuracy method that consists of smoothing the Hough arrayH(ρ, θ) prior to finding its peak location and interpolating about this peak to find a ...
Wayne Niblack, Dragutin Petkovic
openaire   +1 more source

Computation of accuracy of current transformers

Electrical Engineering, 1940
WHILE the general principles of the operation of current transformers have been known for some time, and tests have provided much experimental data, the introduction of high-speed relaying, especially differential protection, required a greater knowledge of currenttransformer performance than was necessary previously. It is the purpose of this paper to
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Accuracy of the Discrete Fourier Transform and the Fast Fourier Transform

SIAM Journal on Scientific Computing, 1996
Accuracy of the discrete Fourier transform (DFT) and the fast Fourier transform (FFT) depends on the accuracy of the twiddle factors entirely. For accurate twiddle factor tables, this paper recommends to compute the sine/cosine functions with high precision arithmetic along the algorithms in terms of faster converging approximations, such as rational ...
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On the Accuracy of Fm-transform Approximation in Boundary Subintervals

2017 International Conference on High Performance Computing & Simulation (HPCS), 2017
Fm-transform approximation loses its accuracy near the boundaries of the function domain. This is because of the truncated basic functions in the first and last subintervals. In this paper, we impose some effective techniques on Fm-transform to overcome this defect. Throughout various examples, it is shown that the utilized techniques can significantly
Masoumeh Zeinali, Sedaghat Shahmorad
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Accuracy of colour transforms

SPIE Proceedings, 2006
Colour management systems need to be accurate and repeatable, particularly in graphic arts applications such as converting image data to proofing systems and to final print processes. Modelling and computation errors were analyzed for a number of characterization data sets including single press sheet measurements and reference printing conditions ...
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A software for evaluating local accuracy in the fourier transform

Mathematics and Computers in Simulation, 1980
Abstract With the evolution of computers toward ever increasing computing speed, the numerical algorithms implemented on such computers are more and more complex, and require a very great number of computations. The numerical errors inherent in floating-point arithmetic of the computer generate errors in the results which may be fairly great. In this
Bois, P., Vignes, J.
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Effects of Facial Transformations on Accuracy of Recognition

The Journal of Social Psychology, 1994
Alterations of facial features between the initial phase of a memory task and a later recognition test lower identification accuracy. The effects of leaving on, leaving off, adding, or removing targets' eyeglasses or beards on identification accuracy were examined in two experiments with American undergraduates.
openaire   +2 more sources