Results 91 to 100 of about 28,415 (248)
Notes on the design of ailerons [PDF]
Recent data have shown that certain forms or types of ailerons that are in extensive use are in reality quite inefficient and entirely unsuited for the high speeds now realized.
Diehl, W S
core +1 more source
Machine Learning Approaches to Forecast the Realized Volatility of Crude Oil Prices
Journal of Forecasting, EarlyView.ABSTRACT This paper presents an evaluation of the accuracy of machine learning (ML) techniques in forecasting the realized volatility of West Texas Intermediate (WTI) crude oil prices. We compare several ML algorithms, including regularization, regression trees, random forests, and neural networks, to several heterogeneous autoregressive (HAR) models ...
Talha Omer +3 more
wiley +1 more source
Journal of Materials Research and TechnologyIn this study, the finite element model coupling with multiple internal-state-variable parameters was used to numerically investigate the forming and microstructure evolution of TC11 titanium alloy shafts formed by flexible skew rolling.
Pengni Feng +6 more
doaj +1 more source
The Chosen Aspects of Skew Rolling of Hollow Stepped Shafts. [PDF]
Materials (Basel), 2021 Bartnicki J, Xia Y, Shu X.
europepmc +1 more source
A Deep Learning Framework for Forecasting Medium‐Term Covariance in Multiasset Portfolios
Journal of Forecasting, EarlyView.ABSTRACT Forecasting the covariance matrix of asset returns is central to portfolio construction, risk management, and asset pricing. However, most existing models struggle at medium‐term horizons, several weeks to months, where shifting market regimes and slower dynamics prevail.
Pedro Reis, Ana Paula Serra, João Gama
wiley +1 more source
Formation mechanism and control of the spiral marks of three-roll skew-rolled hollow axles
Metalurgija, 2021 The spiral marks is one of the main surface quality defects of the three-roll skew rolled hollow axles. In order to eliminate the spiral marks, it is necessary to clarify the cause of the spiral marks on the surface of the rolled piece.
S. Zhang +3 more
doaj
The Case of Fleeting Orders and Flickering Quotes
Journal of Futures Markets, EarlyView.ABSTRACT The literature controversially discusses the ambiguous motives and driving forces behind quickly cancelled limit orders (fleeting orders), which are characteristic of high‐frequency markets. In particular, manipulative and dysfunctional characteristics are feared. We analyze top‐of‐book fleeting orders—so‐called flickering quotes—and show with
Markus Ulze +2 more
wiley +1 more source
Geological Journal, EarlyView.The current study examines the role of Fintech, wind energy, and green technology in determining environmental suitability in Germany from 2000 to 2024. The study employs time series econometric methods to estimate the QQR and QR techniques. The positive effects of wind production, FinTech, Natural Resources and green technology on environmental ...
Hind Alofaysan, Kamel Si Mohammed
wiley +1 more source
Metalurgija, 2014 The article presents results of the research concerning the physical modeling of plastic working of AZ31 magnesium alloy using two research methods. These studies were conducted using a metallurgical process simulator and torsional plastometer.
A. Gryc +4 more
doaj
Roller bearing geometry design [PDF]
A theory of kinematic stabilization of rolling cylinders is extended and applied to the design of cylindrical roller bearings. The kinematic stabilization mechanism puts a reverse skew into the rolling elements by changing the roller taper.
Pinkston, B. H. W., Savage, M.
core +1 more source