Results 71 to 80 of about 6,804 (186)

Forecasting With Dynamic Factor Models Estimated by Partial Least Squares

Journal of Forecasting, Volume 45, Issue 6, Page 2785-2806, September 2026.
ABSTRACT Dynamic factor models (DFMs) have found great success in nowcasting and short‐term macroeconomic forecasting when incorporating large sets of predictive information. The factor loadings are typically estimated cross‐sectionally with principal component analysis (PCA) or maximum likelihood (ML), which ignore whether the factors have predictive ...
Samuel Rauhala
wiley   +1 more source

Chemometrics for mapping the spatial nitrate distribution on the leaf lamina of fenugreek grown under varying nitrogenous fertilizer doses

Open Agriculture
Excess nitrogen fertilizer use leads to vegetables with high amounts of nitrate content. Consumption of vegetables with high amounts of nitrate is carcinogenic to human beings.
Mahanti Naveen Kumar, Chakraborty Subir Kumar, Pathare Pankaj B.   +2 more
doaj   +1 more source

Hyperspectral Reflectance Imaging Technique for Visualization of Moisture Distribution in Cooked Chicken Breast

Sensors, 2013
Spectroscopy has proven to be an efficient tool for measuring the properties of meat. In this article, hyperspectral imaging (HSI) techniques are used to determine the moisture content in cooked chicken breast over the VIS/NIR (400–1,000 nm) spectral ...
Byoung-Kwan Cho, Changyeun Mo, Moon S. Kim, Hoonsoo Lee, Lalit Mohan Kandpal   +4 more
doaj   +1 more source

Quantification of Cocaine Hydrochloride in Seized Drug Samples by Infrared Spectroscopy and PLSR

Journal of the Brazilian Chemical Society, 2014
The determination of cocaine in drug samples is an important task for law enforcement agencies such as the Brazilian Federal Police (BFP). In this sense, this paper proposes a method based on infrared spectra obtained by attenuated total reflectance (ATR) and partial least squares regression (PLSR) to quantify cocaine hydrochloride in drug samples. The
Grobério, Tatiane S., Zacca, Jorge J., Talhavini, Marcio, Braga, Jez W. B.   +3 more
openaire   +3 more sources

Unleashing the power of visible‐near infrared spectroscopy: predicting Golden Delicious apple enzyme activity

Journal of the Science of Food and Agriculture, Volume 106, Issue 12, Page 7503-7511, September 2026.
Abstract BACKGROUND Enzymatic browning is a significant reaction in fruits that affects their color, appearance, and quality. The quality of apples, as a perishable product, is mainly influenced by the activity of two browning‐related enzymes, polyphenol oxidase (PPO) and peroxidase (POD), during storage.
Tarahom Mesri Gundoshmian, Mahsa Sadat Razavi, Reza Akbari, Mohammad Tahmasebi, Irene Locatelli, Silvia Grassi   +5 more
wiley   +1 more source

Transfer learning for enhancing the generality of leaf spectroscopic models in estimating crop foliar nutrients across growth stages

International Journal of Applied Earth Observations and Geoinformation
China, despite being a leading producer of potatoes, has a potato yield below the global average, primarily due to inefficient nutrient management practices. Remote sensing provides a non-invasive and large-scale approach to monitor crop nutrient status,
Yurong Huang, Wenqian Chen, Wei Tan, Yujia Deng, Cuihong Yang, Xiguang Zhu, Jian Shen, Nanfeng Liu   +7 more
doaj   +1 more source

STAID: A Self‐Refining Deep Learning Framework for Spatial Cell‐Type Deconvolution with Biologically Informed Modeling

Advanced Science, Volume 13, Issue 43, 3 August 2026.
STAID is a unified deep learning framework that couples iterative pseudo‐spot refinement with neural network training through a feedback loop and exploits gene co‐expression information to model higher‐order interactions, achieving accurate and robust cell‐type deconvolution in spatial transcriptomics.
Jixin Liu, Shuli Sun, Zhengliang Lv, Xinyu Liu, Yihua Wang, Bingqiang Liu   +5 more
wiley   +1 more source

Astrocyte reactivity modifies the effects of locus coeruleus norepinephrine‐related dysfunction on tau and its impact on cognition

Alzheimer's &Dementia, Volume 22, Issue 8, August 2026.
Abstract INTRODUCTION Animal models demonstrated that pharmacologically‐induced lesioning of the locus coeruleus (LC), the brain's primary source of norepinephrine, triggered astrocyte reactivity, exacerbating Alzheimer's disease (AD) pathology and cognitive deficits.
Prokopis C. Prokopiou, Maxime Van Egroo, Joost M. Riphagen, Marion Baillet, Nicholas J. Ashton, Shorena Janelidze, Reisa A. Sperling, Keith A. Johnson, Kaj Blennow, Oskar Hansson, Henrik Zetterberg, Heidi I. L. Jacobs   +11 more
wiley   +1 more source

Local Asymmetric Least Squares (LAsLS) for Noisy and Complex Baseline Correction

Journal of Chemometrics, Volume 40, Issue 8, August 2026.
ABSTRACT The asymmetric least squares (AsLS) method is commonly used and works well when baseline characteristics are relatively uniform, but can be less accurate for non‐uniform, complex, or noisy baselines. Here, we present local AsLS (LAsLS), a local extension of AsLS that preserves the original penalized least‐squares framework while allowing ...
Adrián Gómez‐Sánchez, Berta Torres‐Cobos, Rodrigo Rocha de Oliveira   +2 more
wiley   +1 more source

Assessment of Visible and Near-Infrared Spectroscopy in Estimation of Lead and Nickel Heavy Metals content in Soil (Case study: Rey Lands)

علوم آب و خاک, 2018
Reflectance spectroscopy is a fast and safe method to predict soil physicochemical and biological properties in low cost ways. Traditional methods to determine soil properties require spending a lot of time and money so that farmers are generally ...
R. Samiei Fard, H. Matinfar
doaj