Results 81 to 90 of about 458,924 (217)
Parametric Time‐Variation in the Unconditional Volatility: Estimation and Inference
Journal of Time Series Analysis, EarlyView.ABSTRACT We propose modeling time‐variation in the unconditional volatility by augmenting the standard GARCH model by a deterministic time‐varying intercept. The model, called the additive time‐varying (ATV‐)GARCH model, can be interpreted as a reduced form of a model including covariates and can be derived from a multiplicative decomposition of ...
Niklas Ahlgren +2 more
wiley +1 more source
Causal Networks and Nonmonotonic Temporal Reasoning
, 1996 We show that the theory of causation that makes use of causal networks is intimately related to nonmonotonic temporal reasoning. Applying the theory of causal networks in a logical context yields a new approach to nonmonotonic temporal reasoning that can
Peter Grünwald
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Mathematical Finance, EarlyView.ABSTRACT We study a dynamic portfolio optimization problem under the mean–variance–variance (M‐V‐V) criterion proposed by Maccheroni et al. It is an analogue of the Arrow–Pratt approximation to the well‐known smooth ambiguity model. Under the standard Black–Scholes framework, we derive fully explicit equilibrium investment strategies in which a DM's ...
David Landriault, Bin Li, Yuanyuan Zhang
wiley +1 more source
Argumentation for Propositional Logic and Nonmonotonic Reasoning
, 2013 Argumentation has played a significant role in understanding and unifying under a common framework different forms of defeasible reasoning in AI.
Kakas A. +4 more
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Nonmonotonic Reasoning in FLORA-2 [PDF]
, 2005 FLORA-2 is an advanced knowledge representation system that integrates F-logic, HiLog, and Transaction Logic. In this paper we give an overview of the theoretical foundations of the system and of some of the aspects of nonmonotonic reasoning in FLORA-2.
openaire +2 more sources
Reasoning about minimal knowledge in nonmonotonic modal logics
, 1999 We study the problem of embedding Halpern and Moses's modal logic of minimal knowledge states into two families of modal formalism for nonmonotonic reasoning, McDermott and Doyle's nonmonotonic modal logics and ground nonmonotonic modal logics. First, we
ROSATI, Riccardo
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Extending Prolog with nonmonotonic reasoning
The Journal of Logic Programming, 1996 Summary: Nonmonotonic reasoning has been developed to capture common sense inferences. This paper considers nonmonotonic reasoning in logic programs with negation, specifically its implementation using Prolog and its integration with Prolog execution. Even within logic programming frameworks, a variety of inferencing methods, model-theoretic semantics,
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Geophysical Research Letters, Volume 53, Issue 21, 16 November 2026.Abstract Understanding transport of anomalous colloids and contaminants requires partition of polydisperse colloids at the pore scale. Using a high‐resolution dual‐mode microscopy system, we directly visualize cross‐sectional concentration profiles. Furthermore, we identify a previously overlooked phenomenon: the occurrence of persistent transverse ...
Zirong Liu +8 more
wiley +1 more source
17O Quadrupole Coupling Constants in Water
Magnetic Resonance in Chemistry, Volume 64, Issue 11, Page 907-916, November 2026.In water clusters, first‐nearest‐neighbor interactions (1A and 1D) provide the largest contribution and are well captured by an additive donor–acceptor scheme, with improved accuracy upon inclusion of hydrogen bond distance dependence. Second nearest neighbor (D and A*) effects introduce smaller but systematic negative corrections, restoring near ...
Nabeeha Haque +2 more
wiley +1 more source
Nonmonotonic Reasoning - Computational Perspective
, 1997 Introduction Nonmonotonic logics were introduced in the late 70s as knowledge representation formalisms. Default logic [Rei80], circumscription [McC80], autoepistemic logic [Moo85, Lev90] and logic programming with negation [ABW88, GL88, Apt90] turned ...
Victor W. Marek +1 more
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