Results 11 to 20 of about 19,221,438 (289)

Computing Gaussian quadrature rules with high relative accuracy

Numerical Algorithms, 2022
AbstractThe computation of n-point Gaussian quadrature rules for symmetric weight functions is considered in this paper. It is shown that the nodes and the weights of the Gaussian quadrature rule can be retrieved from the singular value decomposition of a bidiagonal matrix of size n/2. The proposed numerical method allows to compute the nodes with high
Laudadio T, Mastronardi N, Van Dooren P
openaire   +6 more sources

Computing the singular value decomposition with high relative accuracy [PDF]

Linear Algebra and its Applications, 1999
We analyze when it is possible to compute the singular values and singular vectors of a matrix with high relative accuracy. This means that each computed singular value is guaranteed to have some correct digits, even if the singular values have widely varying magnitudes.
Demmel, James, Gu, Ming, Eisenstat, Stanley, Slapničar, Ivan, Veselić, Krešimir, Drmač, Zlatko   +5 more
core   +4 more sources

Relative accuracy evaluation.

PLoS ONE, 2014
The quality of data plays an important role in business analysis and decision making, and data accuracy is an important aspect in data quality. Thus one necessary task for data quality management is to evaluate the accuracy of the data.
Yan Zhang, Hongzhi Wang, Zhongsheng Yang, Jianzhong Li   +3 more
doaj   +2 more sources

High accuracy proton relative stopping power measurement [PDF]

Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 2018
Proton therapy is a fast growing treatment modality for cancer and is in selected cases preferred over conventional radiotherapy with photons because of the highly conformal dose distribution that can be achieved with protons due to their steep dose gradients.
van Abbema, J. K., van Goethem, M. -J., Mulder, J., Biegun, A. K., Greuter, M. J. W., van der Schaaf, A., Brandenburg, S., van der Graaf, E. R.   +7 more
openaire   +4 more sources

High-relative-accuracy computations with Kac-Murdock-Szegö matrices and their generalizations [PDF]

Computational and Applied Mathematics
Abstract A linear-time-complexity method to obtain the bidiagonal decomposition of a generalized Kac-Murdock-Szegö matrix is presented. For convenient values of the parameters, it can be obtained with high relative accuracy and it can be also used to compute all eigenvalues, all singular values, the inverse and the solution of some linear ...
Jorge Delgado 0001, Juan Manuel Peña 0001   +1 more
openaire   +5 more sources

High-Accuracy Relative Pose Measurement of Noncooperative Objects Based on Double-Constrained Intersurface Mutual Projections

Sensors, 2022
Relative pose measurement for noncooperative objects is an important part of 3D shape recognition and motion tracking. The methods based on scanning point clouds have better environmental adaptability and stability than image-based methods.
Yu Gan, Guangmin Li, Guodong Liu, Binghui Lu   +3 more
doaj   +1 more source

RELATIVE ADJUSTMENT OF MOBILE LASER SCANNING DATA IN DIFFERENT SCENES [PDF]

ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2022
Adjustment is a final step in the post-processing of mobile laser scanning (MLS) data. This stage improves the accuracy of point cloud and trajectory registration in the global coordinate system.
M. A. Altyntsev
doaj   +1 more source

A high accuracy ultrasound distance measurement system using binary frequency shift-keyed signal and phase detection [PDF]

, 2007
A highly accurate binary frequency shift-keyed ultrasonic distance measurement system for use in air is described. This paper presents an efficient algorithm which combines both the time-of-flight method and the phase-shift method. The method used will
Longstaff, Andrew P., Aldawi, Fouad, Fletcher, Simon, Mather, Peter, Myers, Alan   +4 more
core   +4 more sources

Polynomial Total Positivity and High Relative Accuracy Through Schur Polynomials

Journal of Scientific Computing, 2023
AbstractIn this paper, Schur polynomials are used to provide a bidiagonal decomposition of polynomial collocation matrices. The symmetry of Schur polynomials is exploited to analyze the total positivity on some unbounded intervals of a relevant class of polynomial bases.
Pablo Díaz, Esmeralda Mainar, Beatriz Rubio   +2 more
openaire   +4 more sources

Performance Analysis of Relative Positioning using GPS and BDS signals [PDF]

E3S Web of Conferences, 2019
In general, the satellite signal received by GNSS receivers has errors such as satellite clock error, orbit error, ionospheric delay and tropospheric delay.
Noh Jae Hee, Lee Sun Yong, Lim Deok Won, Jo Gwang Hee, Lee Jin Hyuk, Lee Sang Jeong   +5 more
doaj   +1 more source