Results 31 to 40 of about 4,609,055 (154)

Interlacing inequalities for totally nonnegative matrices [PDF]

, 2002
Suppose λ1⩾⋯⩾λn⩾0 are the eigenvalues of an n×n totally nonnegative matrix, and λ̃1⩾⋯⩾λ̃k are the eigenvalues of a k×k principal submatrix. A short proof is given of the interlacing inequalities:λi⩾λ̃i⩾λi+n−k,i=1,…,k.It is shown that if k=1,2,n−2,n−1, λi
Li, Chi-Kwong, Li, CK, Chi-Kwong Li, Mathias, Roy, Roy Mathias   +4 more
core   +1 more source

Multiobjective Simulation–Optimization of Crop Allocation and Water Resources in Canal Command Areas Using Genetic Algorithms

Irrigation and Drainage, EarlyView.
ABSTRACT This study develops an integrated simulation–optimization framework for sustainable crop allocation and water resource management in the Bargarh Canal Command (BCC), eastern India. Efficient irrigation allocation remains a critical challenge due to competing demands, groundwater–surface water interactions and environmental constraints ...
Priyanka Mohapatra, J. C. Paul, Sushree Sangita Dash   +2 more
wiley   +1 more source

Minimal positive realizations of transfer functions with nonnegative multiple poles [PDF]

, 2005
This note concerns a particular case of the minimality problem in positive system theory. A standard result in linear system theory states that any nth-order rational transfer function of a discrete time-invariant linear single-input-single-output (SISO)
Matolcsi, Máté, Nagy, B.
core   +1 more source

Using Distribution Regression Difference‐in‐Differences to Evaluate the Effects of a Minimum Wage Introduction on the Distributions of Wages, Earnings, and Working Hours

Journal of Applied Econometrics, EarlyView.
ABSTRACT We estimate the causal effects of the introduction of the minimum wage in Germany on the distributions of hourly wages, monthly earnings, and hours worked, combining rich large‐scale data sources. We compare linear and non‐linear versions of distribution regression difference‐in‐differences (DR‐DiD) and also estimate bivariate DR‐DiD.
Martin Biewen, Bernd Fitzenberger, Marian Rümmele   +2 more
wiley   +1 more source

Relationship Between Mean Kärger Model Water Exchange Rate and Intercellular Water Transition Rate

Magnetic Resonance in Medicine, EarlyView.
ABSTRACT Purpose To derive a quantitative relationship between the mean Kärger model (KM) water exchange rate and the mean intercellular water transition rate applicable to brain and other complex biological tissues. Theory and Methods The mean KM water exchange rate applies to any KM, accommodates an arbitrary number of compartments, and can be ...
Jens H. Jensen, Hunter G. Moss, Thorsten Feiweier, Andreana Benitez   +3 more
wiley   +1 more source

Richardson method and totally nonnegative linear systems [PDF]

, 2010
We show that modified Richardson method converges for any nonsingular totally nonnegative stochastic matrix for any choice of the parameter between 0 and 2.
J.M. Carnicer, Carnicer, J.M., J.M. Peña, Delgado, J., Peña, J.M., J. Delgado   +5 more
core   +1 more source

A Case Study to Monitor Parallel‐Connected Ni–Cd Batteries on EMU Trains Through Compositional Data Control Charts

Quality and Reliability Engineering International, EarlyView.
ABSTRACT Electric multiple unit (EMU) trains, widely used in modern railway transportation, use Nickel–Cadmium (Ni–Cd) batteries to power auxiliary systems on board, including lighting, ventilation, control electronics, and emergency systems. These batteries are often connected in parallel to ensure a wider power supply range for electrical loads that ...
Christian Capezza, Guido Cesaro, Antonio Lepore, Biagio Palumbo, Emanuele Rossi   +4 more
wiley   +1 more source

Spectroscopic Analysis of Hydration Structures in PEG‐ and PMPC‐Containing Hydrogels by Pressure‐Controlled ATR‐IR Combined With Multivariate Curve Resolution

Surface and Interface Analysis, EarlyView.
ABSTRACT Hydration structures govern the properties and functions of hydrogels, yet selectively measuring hydration water in the presence of abundant bulk water remains analytically challenging. Here we applied pressure‐controlled attenuated total reflection infrared spectroscopy (ATR‐IR) combined with multivariate curve resolution (MCR) analysis, a ...
Shoichi Maeda, Shunta Chikami, Glenn Villena Latag, Ryuya Gotanda, Masaki Kamiya, Koji Miyamoto, Chia‐Ying Chiang, Tomohiro Hayashi   +7 more
wiley   +1 more source

Graph‐Laplacian modeling of spatiotemporal effects for house price estimation

Real Estate Economics, EarlyView.
Abstract Many variables involve the modeling of spatial effects, and their dynamics over time. This article presents a linear model in which spatiotemporal random effects are modeled by graph‐Laplacians. A graph‐Laplacian flexibly encodes adjacency in both space and time, in our case not depending on unknown parameters. The graph‐Laplacian can be input
Willem P Sijp, Marc K. Francke
wiley   +1 more source

Totally nonnegative Grassmannians, Grassmann necklaces, and quiver Grassmannians

, 2023
Postnikov constructed a cellular decomposition of the totally nonnegative Grassmannians. The poset of cells can be described (in particular) via Grassmann necklaces.
Putz A., Lanini M., Feigin E.
core   +1 more source