Results 21 to 30 of about 76,024 (266)

Pushing aggregate constraints by divide-and-approximate [PDF]

open access: yesProceedings 19th International Conference on Data Engineering (Cat. No.03CH37405), 2004
Iceberg-cube mining is to compute the GROUP BY partitions, for all GROUP BY dimension lists, that satisfy a given aggregate constraint. Previous works have pushed anti-monotone constraints into iceberg-cube mining. However, many useful constraints are not anti-monotone.
Wang, Ke   +4 more
openaire   +3 more sources

Constrained spectral clustering via multi–layer graph embeddings on a grassmann manifold

open access: yesInternational Journal of Applied Mathematics and Computer Science, 2019
We present two algorithms in which constrained spectral clustering is implemented as unconstrained spectral clustering on a multi-layer graph where constraints are represented as graph layers.
Trokicić Aleksandar   +1 more
doaj   +1 more source

Reliability-Based Design Optimization of Structures Using Complex-Step Approximation with Sensitivity Analysis

open access: yesApplied Sciences, 2021
Structural optimization aims to achieve a structural design that provides the best performance while satisfying the given design constraints. When uncertainties in design and conditions are taken into account, reliability-based design optimization (RBDO)
Junho Chun
doaj   +1 more source

Connected bin packing problem on traceable graphs [PDF]

open access: yesIranian Journal of Numerical Analysis and Optimization, 2022
We consider a new extension of the bin packing problem in which a set of connectivity constraints should be satisfied. An undirected graph with a weight function on the nodes is given.
A. Nejoomi, A. Dolati
doaj   +1 more source

关于有固定工件和序约束的单机最小化最大流程排序问题的注记(A short note on the approximability of the single machine scheduling problem to minimize makespan with fixed jobs and precedence constraints)

open access: yesZhejiang Daxue xuebao. Lixue ban, 2008
The single machine scheduling problem to minimize makespan with fixed jobs and precedence constraints is considered. There are some fixed jobs which are already fixed in the schedule.
YANGAi-feng(杨爱峰)   +1 more
doaj   +1 more source

Fuzzy-approximation-based prescribed performance control of air-breathing hypersonic vehicles with input constraints

open access: yesScience Progress, 2020
In this article, aiming at the longitudinal dynamics model of air-breathing hypersonic vehicles, a fuzzy-approximation-based prescribed performance control scheme with input constraints is proposed.
Xingge Li   +3 more
doaj   +1 more source

Medical Image Denoising Based on Biquadratic Polynomial With Minimum Error Constraints and Low-Rank Approximation

open access: yesIEEE Access, 2020
To improve the visual quality of noisy medical images acquired by low radiation dose imaging, medical image denoising is highly desirable for clinical disease diagnosis.
Linlin Ji, Qiang Guo, Mingli Zhang
doaj   +1 more source

Approximation with interpolatory constraints [PDF]

open access: yesProceedings of the American Mathematical Society, 2001
Given a triangular array of points on [ − 1 , 1 ] [-1,1] satisfying certain minimal separation conditions, a classical theorem of Szabados asserts the existence of polynomial operators that provide interpolation at these points as well as a near-optimal degree of approximation for arbitrary ...
Mhaskar, H. N.   +3 more
openaire   +2 more sources

𝐿¹-approximation with constraints [PDF]

open access: yesTransactions of the American Mathematical Society, 1990
In this paper we study problems of best L 1 {L^1}
Allan Pinkus, Hans Strauss
openaire   +1 more source

Diophantine approximation with constraints

open access: yesActa Arithmetica, 2023
Following Schmidt, Thurnheer and Bugeaud-Kristensen, we study how Dirichlet's theorem on linear forms needs to be modified when one requires that the vectors of coefficients of the linear forms make a bounded acute angle with respect to a fixed proper non-zero subspace $V$ of $\mathbb{R}^n$.
Champagne, Jérémy, Roy, Damien
openaire   +2 more sources

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