Results 51 to 60 of about 5,940,643 (309)
An Optimal Bifactor Approximation Algorithm for the Metric Uncapacitated Facility Location Problem [PDF]
, 2006 We consider the metric uncapacitated facility location problem(UFL). In this paper we modify the (1 + 2/e)-approximation algorithm of Chudak and Shmoys to obtain a new (1.6774,1.3738)- approximation algorithm for the UFL problem.
Byrka, Jaroslaw
core +3 more sources
Lower bounds for the approximative complexity
Theoretical Computer Science, 1986 We generalize several methods for obtaining lower bounds for the complexity of polynomials, such as those based on substitution, transcendence degree or algebraic geometric degree, to the approximate model.
openaire +2 more sources
Axioms, 2021 For L a complete co-residuated lattice and R an L-fuzzy relation, an L-fuzzy upper approximation operator based on co-implication adjoint with L is constructed and discussed.
Qiu Jin, Lingqiang Li
doaj +1 more source
Rough and T-Rough Sets Arising from Intuitionistic Fuzzy Ideals in BCK-Algebras
MathematicsThis paper presents the novel concept of rough intuitionistic fuzzy ideals within the realm of BCK-algebras and investigates their fundamental properties.
Kholood M. Alsager, Sheza M. El-Deeb
doaj +1 more source
Approximation Set of the Interval Set in Pawlak's Space
The Scientific World Journal, 2014 The interval set is a special set, which describes uncertainty of an uncertain concept or set Z with its two crisp boundaries named upper-bound set and lower-bound set.
Qinghua Zhang +3 more
doaj +1 more source
Multi-fuzzy Rough Sets based on Implicators and Continuous t-norms
Fuzzy Information and Engineering, 2017 This paper extends the study of multi-fuzzy rough sets using an implicator and a continuous t-norm and thus introduces multi-fuzzy rough sets based on fuzzy logical connectives.
Gayathri Varma, Sunil Jacob John
doaj +1 more source
Interval estimation of trigonometrical splines [PDF]
MATEC Web of Conferences, 2019 Quite often, it is necessary to quickly determine variation range of the function. If the function values are known at some points, then it is easy to construct the local spline approximation of this function and use the interval analysis rules.
Burova I.G., Ivanova E.G., Kostin V.A.
doaj +1 more source
A Lattice-Theoretic Approach to Multigranulation Approximation Space
The Scientific World Journal, 2014 In this paper, we mainly investigate the equivalence between multigranulation approximation space and single-granulation approximation space from the lattice-theoretic viewpoint.
Xiaoli He, Yanhong She
doaj +1 more source
Central Nervous System Tumors Among Infants in Canada: A Report From CYP‐C
Pediatric Blood &Cancer, EarlyView.ABSTRACT Background Central nervous system (CNS) tumors in infants are rare, pose unique clinical challenges, and lack large‐scale evidence‐based data to guide management. This study seeks to describe CNS tumors in Canadian infants and to compare their outcomes with those of older children.
Samuel Sassine +17 more
wiley +1 more source
The Best Reference Latitude for the Eddy Heat Flux Approximation in the Lower Stratosphere
Gaoyuan qixiang, 2023 Stratospheric atmosphere is jointly affected by dynamical， radiative and chemical processes.Since the 1970s， the greenhouse gas emission and ozone depletion caused by anthropogenic activities have driven significant stratospheric cooling， so the ...
Fenghua YANG, Renqiang LIU
doaj +1 more source