Results 41 to 50 of about 4,212,997 (318)

A Dual-Staged Attention Based Conversion-Gated Long Short Term Memory for Multivariable Time Series Prediction

IEEE Access, 2022
In multivariate time series modeling, it is necessary to capture short-term mutation and long-term dependence information simultaneously. However, mechanism which can capture short-term change is difficult to be used to grasp long-term dependence ...
Shufang Feng, Yong Feng
doaj   +1 more source

Quantum Reflection of S-wave Unstable States [PDF]

AIP Conf.Proc.1030:244-249,2008, 2008
The phase time in quantum tunneling can be disentangled into a dwell time plus a term arising due to the interference of the reflected and incident waves in front of the barrier. The interference term dominates at low energies and as E --> 0, this term and hence the phase time becomes singular.
arxiv   +1 more source

Population and species neighbor identity impact trait–trait relationships and plant performance

Population Ecology, EarlyView.
We evaluated how populations and species identity influence plant performance and trait outcomes in mixtures, and assessed trait variation among populations of two forb species native to the western United States (Dieteria canescens and Heterotheca villosa) following three interaction treatments (single‐population monoculture, two‐population mixture ...
Alicia J. Foxx, Florian Fort, Andrea T. Kramer   +2 more
wiley   +1 more source

Short term vs. long term: Optimization of microswimmer navigation on different time horizons

Physical Review Research
We use reinforcement learning to find strategies that allow microswimmers in turbulence to avoid regions of large strain. This question is motivated by the hypothesis that swimming microorganisms tend to avoid such regions to minimize the risk of ...
N. Mousavi, J. Qiu, L. Zhao, B. Mehlig, K. Gustavsson   +4 more
doaj   +1 more source

Strong Maximum Principle for Multi-Term Time-Fractional Diffusion Equations and its Application to an Inverse Source Problem [PDF]

Comput. Math. Appl. 73 (2017) 96-108, 2015
In this paper, we establish a strong maximum principle for fractional diffusion equations with multiple Caputo derivatives in time, and investigate a related inverse problem of practical importance. Exploiting the solution properties and the involved multinomial Mittag-Leffler functions, we improve the weak maximum principle for the multi-term time ...
arxiv   +1 more source

Effects of chronic browsing on life‐history traits of an irruptive large herbivore population

Population Ecology, EarlyView.
This study aimed to determine the relationship between diet quality, body mass, and size (hind foot length), and female reproduction and sought to identify the mechanism by which high density under severe food limitations is maintained. Our results demonstrated that sika deer introduced to Nakanoshima Island have maintained high densities through high ...
Koichi Kaji, Kazutaka M. Takeshita, Hiroshi Takahashi, Hiromasa Igota, Mayumi Ueno, Yukiko Matsuura, Takashi Ikeda, Ryo Yoshizawa, Hino Takafumi, Tsuyoshi Yoshida   +9 more
wiley   +1 more source

Properties of terms of OEIS A342810 [PDF]

arXiv, 2021
The OEIS sequence A342810 contains the numbers that divide the smallest number that has the sum of their digits. It is proved that if a term $x$ has the form $3^m \times y$ where $m \geq 2$, then all prime factors of $y$ are prime divisors of solutions to $10^n \equiv 1 \; ( \bmod n)$.
arxiv  

Combining transient dynamics and logistic‐asymptotic growth to study the recovery of two seabird populations after rat eradication

Population Ecology, EarlyView.
This study examines the demographic dynamics of two seabird populations on Tromelin Island, 15 years after the eradication of brown rats. The results indicate that these populations are in good health and are expected to continue growing until breeding sites are saturated in about a century.
Merlène Saunier, Christophe Barbraud, Maxime Amy, Sabine Orlowski, Jean Hivert, Gabrielle Dicque, Matthieu Le Corre   +6 more
wiley   +1 more source

Time‐Dependent Impact of Sex on the Long‐Term Outcomes After Left Main Revascularization

Journal of the American Heart Association: Cardiovascular and Cerebrovascular Disease, 2022
Background There are still limited data about the differential effect of sex on long‐term outcomes after percutaneous coronary intervention (PCI) or coronary artery bypass grafting (CABG) for left main coronary artery disease.
Yong‐Hoon Yoon, Jung‐Min Ahn, Jung Bok Lee, Do‐Yoon Kang, Hanbit Park, Yeong Jin Jeong, Junghoon Lee, Ju Hyeon Kim, Yujin Yang, Junho Hyun, Pil Hyung Lee, Duk‐Woo Park, Seung‐Jung Park   +12 more
doaj   +1 more source

The unpredictably eruptive dynamics of spruce budworm populations in eastern Canada

Population Ecology, EarlyView.
We examine historical population data for spruce budworm from several locations through the period 1930–1997, and use density‐dependent recruitment curves to test whether the pattern of population growth over time is more consistent with Royama's (1984; Ecological Monographs 54:429–462) linear R(t) model of harmonic oscillation at Green River New ...
Barry J. Cooke, Jacques Régnière
wiley   +1 more source