Results 121 to 130 of about 51,215 (304)
Perturbation Methods for Saddle Point Computation [PDF]
, 1994 A general class of iterative methods for saddle point seeking is developed. The directions used are subgradients evaluated at perturbed points. Convergence of the methods is proved and alternative strategies for implementation are discussed.
Andrzej Ruszczynski, Markku Kallio
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Constraint preconditioners for solving singular saddle point problems [PDF]
, 2013 We study constraint preconditioners for solving singular saddle point problems. We analyze properties of the preconditioned matrices, in particular their eigenvalue distributions, and prove that for solving singular saddle point problems by ...
Zhang, Naimin, Shen, Pan
core +1 more source
Research on Diaphragm Pump Fault Diagnosis Method Based on Res‐DCB‐Net
Asia-Pacific Journal of Chemical Engineering, EarlyView.ABSTRACT Nonstationary pressure pulsation signals of diaphragm pumps contain strong background noise and coupled characteristics. This makes it challenging to extract incipient fault features and to decouple faults with similar physical mechanisms. To address these limitations, this paper proposes a spatiotemporal fault diagnosis model named Res‐DCB ...
Jiahui Wang +7 more
wiley +1 more source
Evaluation of ST preconditioners for saddle point problems [PDF]
, 2011 The general block ST decomposition of the saddle point problem is used as a preconditioner to transform the saddle point problem into an equivalent symmetric and positive definite system. Such a decomposition is called a block ST preconditioner.
Yuan, Jin Yun +9 more
core +1 more source
Advanced Physics Research, EarlyView.A physics‐grounded framework based on decoherence timescales (τ_dec vs τ_func), Markovian validity, and falsifiability criteria is applied across molecular systems to distinguish where quantum effects are necessary, marginal, or irrelevant. The analysis integrates quantum chemistry, biological quantum mechanisms, and quantum computing under a unified ...
Sarfaraz K. Niazi
wiley +1 more source
Valley polarization of graphene via the saddle point
npj Computational MaterialsGraphene, and other members of the monolayer Xene family, represent an ideal materials platform for “valleytronics”, the control of valley localized charge excitations.
Deepika Gill +4 more
doaj +1 more source
The Anatomical Record, EarlyView.Abstract The upper carbonate concretion levels of the Romualdo Formation (Aptian, Brazil) have yielded several theropod dinosaur remains, including spinosaurids and the coelurosaurs Santanaraptor placidus and Mirischia asymmetrica, the phylogenetic affinities of which are controversial.
Rafael Delcourt +4 more
wiley +1 more source
Time-scale separation at saddle point (A) and saddle node bifurcation (B-C). [PDF]
, 2012 (A) A time-scale separation between the stable and unstable manifolds of the saddle point enhances its temporary attractivity. Trajectories (grey curves) converge to the unstable manifold (red dashed line) in the fast time-scale before sliding to a ...
Laura Trotta (177193) +2 more
core +1 more source
The Anatomical Record, EarlyView.Abstract The Late Triassic–Early Jurassic fissures of the Bristol Channel area (southwest England and south Wales) are renowned for their diverse vertebrate faunas. These assemblages have yielded an array of predominantly small‐bodied forms that are crucial to our understanding of the early evolution of several major tetrapod clades.
Ewan H. Bodenham +4 more
wiley +1 more source
Preconditioning of Saddle Point Systems [PDF]
, 2000 The solution of the original system, the use of the null space transformation and the use of the range space transformation are considered. Computational experiments are given.
Lukšan, Ladislav
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