Results 71 to 80 of about 11,450 (279)
Revisiting EWMA in High‐Frequency‐Based Portfolio Optimization: A Comparative Assessment
Journal of Applied Econometrics, EarlyView.ABSTRACT This paper compares the statistical and economic performance of state‐of‐the‐art high‐frequency (HF) based multivariate volatility models with a simpler, widely used alternative, the Exponentially Weighted Moving Average (EWMA) filter. Using over two decades of 100 U.S.
Laura Capera Romero, Anne Opschoor
wiley +1 more source
Non-adaptive programmability of random oracle
, 2015 Random Oracles serve as an important heuristic for proving security of many popular and important cryptographic primitives. But, at the same time they are criticized due to the impossibility of practical instantiation.
Bhattacharyya, Rishiraj; id_orcid +1 more
core +1 more source
Bayesian Model Averaging in Causal Instrumental Variable Models
Journal of Applied Econometrics, EarlyView.ABSTRACT Instrumental variables are a popular tool to infer causal effects under unobserved confounding, but choosing suitable instruments is challenging in practice. We propose gIVBMA, a Bayesian model averaging procedure that addresses this challenge by averaging across different sets of instrumental variables and covariates in a structural equation ...
Gregor Steiner, Mark Steel
wiley +1 more source
Concurrent signature without random oracles
Theoretical Computer Science, 2015 zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Xiao Tan 0003 +2 more
openaire +2 more sources
Knowledge and Process Management, EarlyView.ABSTRACT Enterprise Resource Planning (ERP) systems are integrated business management tools used by organizations to manage data and processes across various functions. While financial and technical considerations remain central to ERP selection, sustainable success also depends on the system's ability to support Knowledge Management (KM).
Deniz Sadat Sebti Esmail Pour +1 more
wiley +1 more source
Magnetic Resonance in Medicine, EarlyView.ABSTRACT Purpose To propose a new method using a physics‐guided neural network for quantitative parameter mapping in balanced steady‐state free precession (bSSFP) imaging. Theory and Methods We trained physics‐guided neural networks with a multilayer perceptron using simulated bSSFP signals generated from tissue parameters (T1$$ {T}_1 $$, T2$$ {T}_2 $$,
Hye‐Ryeong Choi +2 more
wiley +1 more source
Blockchain Certificateless Encryption Mechanism Based on National Secret Algorithm [PDF]
Jisuanji kexueThe blockchain has attracted widespread attention because of its distributed,non-tamperable and inherent immutability features.However,the international cryptographic algorithm used in the blockchain has certain backdoor security risks.Based on the ...
XIANG Yanjie, HUANG Xiaofang, XIANG Kefeng, ZHENG Ji’nan
doaj +1 more source
Random Oracles and Auxiliary Input [PDF]
, 2007 We introduce a variant of the random oracle model where oracle-dependent auxiliary input is allowed. In this setting, the adversary gets an auxiliary input that can contain information about the random oracle. Using simple examples we show that this model should be preferred over the classical variant where the auxiliary input is independent of the ...
openaire +2 more sources
Quantum Depth in the Random Oracle Model
, 2022 We give a comprehensive characterization of the computational power of shallow quantum circuits combined with classical computation. Specifically, for classes of search problems, we show that the following statements hold, relative to a random oracle: (
Gheorghiu, Alexandru +11 more
core +1 more source
Connecting the distribution and diversification of marine plants
Oikos, EarlyView.Integration of the evolutionary history with distribution of extant species is necessary to explain present‐day diversity, particularly for ‘foundation' species, such as seagrasses, which create habitats of socioecological relevance. Here, we resolved if varying evolutionary history of seagrass families has imprinted the distribution ranges of extant ...
Fernando Tuya +3 more
wiley +1 more source