Results 91 to 100 of about 452,503 (268)

Chlorophyll-A Time Series Study on a Saline Mediterranean Lagoon: The Mar Menor Case

Engineering Proceedings
The Mar Menor, Europe’s largest saline lagoon, has experienced significant eutrophication. The concentration of chlorophyll-a (Chl-a) in the water is used as a critical indicator of this eutrophication process and can alert us to possible ecosystemic ...
Arnau Garcá-i-Cucó, José Gellida-Bayarri, Beatriz Chafer-Dolz, Juan-Carlos Cano, José M. Cecilia   +4 more
doaj   +1 more source

Pricing stock options under stochastic volatility and interest rates with efficient method of moments estimation [PDF]

While the stochastic volatility (SV) generalization has been shown to improve the explanatory power over the Black-Scholes model, empirical implications of SV models on option pricing have not yet been adequately tested.
Jiang, George J., Sluis, Pieter J. van der   +1 more
core   +1 more source

Fractional cointegrating regressions in the presence of linear time trends [PDF]

, 1998
We consider regressions of nonstationary fractionally integrated variables dominated by linear time trends. The regression errors are short memory, long memory or even nonstationary, and hence allow for a very flexible cointegration model.
Hassler, Uwe, Marmol, Francesc
core   +1 more source

Multifunctional Bio‐Based Packaging for Perishable Foods: Structural Design, Scalable Fabrication, and Versatile Applications

Advanced Materials, EarlyView.
An overview of design principles and scalable fabrication strategies for multifunctional bio‐based packaging. Radiative cooling films, modified‐atmosphere films/membranes, active antimicrobial/antioxidant platforms, intelligent optical/electrochemical labels, and superhydrophobic surfaces are co‐engineered from material chemistry to mesoscale structure
Lei Zhang, Jiaqi Zhang, Mei Cui, Wei Qi, Renliang Huang, Rongxin Su, Kai Zhang   +6 more
wiley   +1 more source

Why Machine Learning Models Systematically Underestimate Extreme Values II: How to Fix It with LatentNN

The Open Journal of Astrophysics
Attenuation bias---the systematic underestimation of regression coefficients due to measurement errors in input variables---affects astronomical data-driven models.
Yuan-Sen Ting
doaj   +1 more source

"Moment-Based Estimation of Smooth Transition Regression Models with Endogenous Variables" [PDF]

Nonlinear regression models have been widely used in practice for a variety of time series and cross-section datasets. For purposes of analyzing univariate and multivariate time series data, in particular, Smooth Transition Regression (STR) models have ...
Marcelo C. Medeiros, Michael McAleer, Waldyr Dutra Areosa   +2 more
core  

Data‐Driven Discovery of Quaternary Ammonium Interlayers for Efficient and Thermally Stable Perovskite Solar Cells

Advanced Materials, EarlyView.
An active learning framework, grounded in independently generated in‐house experimental data, enables reliable discovery of high‐performance interfacial materials for perovskite solar cells. Iterative model refinement autonomously converges toward structurally robust quaternary ammonium architectures, establishing a new design principle for interfacial
Jongbeom Kim, Yang Jeong Park, Chaehoon Jeon, Nahye Shin, Jaewang Park, Seungun Lee, Jino Im, Sungroh Yoon, Sang Il Seok   +8 more
wiley   +1 more source

A Comparative Study of Neural Network Models for China’s Soybean Futures Price Forecasting

Agriculture
Accurate prediction of soybean futures prices is crucial for agricultural risk management and market decision-making. This study systematically evaluated nine state-of-the-art deep learning models—iTransformer, TFT, TCN, TimesNet, PatchTST, TiDE, TSMixer,
Xin Dai, Li Chen, Ying Hou, Xiaohan Ning, Wenqiang Zhao, Yunpeng Cui, Juan Liu, Mo Wang   +7 more
doaj   +1 more source

Anthropometric multicompartmental model to predict body composition In Brazilian girls

BMC Sports Science, Medicine and Rehabilitation, 2017
Background Anthropometric models remain appropriate alternatives to estimate body composition of peripubertal populations. However, these traditional models do not consider other body components that undergo major changes during peripubertal growth spurt,
Dalmo Machado, Analiza Silva, Luis Gobbo, Paula Elias, Francisco J. A. de Paula, Nilo Ramos   +5 more
doaj   +1 more source

Resistance to Overdoping Allows Over 2000 S cm−1 Conductivity in P(g3BTTT) With Anion‐Exchange Doping

Advanced Materials, EarlyView.
Anion‐exchange doping of conjugated polymers is an effective way to achieve high conductivities. Here, we report over 2000 S cm−1 electrical conductivity for doped P(g3BTTT). In addition, we show that P(g3BTTT) sustains exceptionally high doping levels without any drop in the charge mobility.
Basil Hunger, Maximilian M. Horn, Eva Röck, Diego Rosas Villalva, Lize Bynens, Jochen Vanderspikken, Christina Kousseff, Silène Gobeil, Olivier Bardagot, Nesibe Akmanşen‐Kalayci, Sarah H. Tolbert, Iain McCulloch, Wouter Maes, Demetra Tsokkou, Natalie Banerji   +14 more
wiley   +1 more source