Results 191 to 200 of about 81,328 (284)

Coherent Forecasting of Realized Volatility

Journal of Forecasting, EarlyView.
ABSTRACT The QLIKE loss function is the stylized favorite of the literature on volatility forecasting when it comes to out‐of‐sample evaluation and the state of the art model for realized volatility (RV) forecasting is the HAR model, which minimizes the squared error loss for in‐sample estimation of the parameters.
Marius Puke, Karsten Schweikert
wiley   +1 more source

Severe cytomegalovirus encephalitis in an immunocompetent man: a case report. [PDF]

BJR Case Rep
Chait F, Bahlouli N, Sqalli Houssaini A, Lahlou I, Edderai M, El Fenni J.   +5 more
europepmc   +1 more source

Electricity Price Prediction Using Multikernel Gaussian Process Regression Combined With Kernel‐Based Support Vector Regression

Journal of Forecasting, EarlyView.
ABSTRACT This paper presents a new hybrid model for predicting German electricity prices. The algorithm is based on a combination of Gaussian process regression (GPR) and support vector regression (SVR). Although GPR is a competent model for learning stochastic patterns within data and for interpolation, its performance for out‐of‐sample data is not ...
Abhinav Das, Stephan Schlüter, Lorenz Schneider   +2 more
wiley   +1 more source

Diagnostic Challenges in Intracranial Rosai-Dorfman Disease: Differentiating It From Meningiomas Using Imaging. [PDF]

Cureus
Mourad JF, Bryniarski M.
europepmc   +1 more source

Why Do Hedgers Hedge? The Role of Ambiguity

Journal of Futures Markets, EarlyView.
ABSTRACT This paper investigates whether ambiguity influences hedging behavior in commodity futures markets. Using high‐frequency crude oil futures data, distinct measures of risk and ambiguity are linked to weekly hedging positions from the Commodity Futures Trading Commission (CFTC).
Fiona Höllmann
wiley   +1 more source

Minimizing Movements for the Generalized Power Mean Curvature Flow. [PDF]

Milan J Math
Bellettini G, Kholmatov SY.
europepmc   +1 more source

Late summer plateau pika spatial habitat use revealed by high‐resolution wildlife tracking and unmanned aerial vehicle data on the Qinghai‐Tibet Plateau

Grassland Research, EarlyView.
Tiny “ecosystem engineers,” plateau pikas range across 1600 m², about two basketball courts, mixing soil and nutrients that sustain Tibet's fragile grasslands. Custom‐made trackers and drone imagery show dawn‐to‐dusk surface foraging and nested‐scale patch choices, offering fresh guidance for wildlife‐friendly grazing management.
Dan Li, Johannes M. H. Knops, Li Li
wiley   +1 more source

Mirror Descent and Exponentiated Gradient Algorithms Using Trace-Form Entropies. [PDF]

Entropy (Basel)
Cichocki A, Tanaka T, Nielsen F, Cruces S.   +3 more
europepmc   +1 more source

How (not) to Cage an Electron: The Perfluoro Cage Effect as an Extrinsic Molecular Property

Helvetica Chimica Acta, EarlyView.
A rigorous definition within Kohn–Sham density functional theory is presented for the notion of an caged electron inside perfluorinated fullerenes as radical anions. ABSTRACT The notion of a (molecular) electron cage was coined for the unique hosting capacity of perfluorocubane, suggesting the “encapsulation of an electron” within the highly symmetric ...
Andreas Riedmiller, Christian Mück‐Lichtenfeld, Johannes Neugebauer   +2 more
wiley   +1 more source

Cerebral Amyloid Angiopathy With Progressive Cortical Superficial Siderosis and Convexity Subarachnoid Hemorrhage in an Apolipoprotein E (APOE) ε2/ε2 Homozygous Patient: A Case Report and Literature Review. [PDF]

Cureus
Hayashi M, Ikeda M, Kobayashi K.
europepmc   +1 more source