Results 11 to 20 of about 19,008,149 (295)

Converting monospecific into mixed forests: stakeholders' views on ecosystem services in the Black Forest Region

Ecology and Society, 2021
Converting monospecific into mixed forests can increase forests' resilience against climate change-related extreme events such as droughts and storms. This insight is especially true when the tree species help each other, such as the fir in low mountain ...
Iulia Almeida, Christine Rösch, Somidh Saha   +2 more
doaj   +1 more source

Two types of weight-dependent walks with a trap in weighted scale-free treelike networks

Scientific Reports, 2018
In this paper, we present the weighted scale-free treelike networks controlled by the weight factor r and the parameter m. Based on the network structure, we study two types of weight-dependent walks with a highest-degree trap.
Meifeng Dai, Yue Zong, Jiaojiao He, Xiaoqian Wang, Yu Sun, Weiyi Su   +5 more
doaj   +1 more source

Existence and blow-up of solutions in Hénon-type heat equation with exponential nonlinearity

Advances in Nonlinear Analysis, 2023
In the present article, we are concerned with the following problem: vt=Δv+∣x∣βev,x∈RN,t>0,v(x,0)=v0(x),x∈RN,\left\{\phantom{\rule[-1.25em]{}{0ex}}\begin{array}{ll}{v}_{t}=\Delta v+| x{| }^{\beta }{e}^{v},\hspace{1.0em}& x\in {{\mathbb{R}}}^{N},\hspace{0.
Gao Dongmei, Wang Jun, Wang Xuan
doaj   +1 more source

Plant species richness increases with light availability, but not variability, in temperate forests understorey

BMC Ecology, 2020
Background Temperate forest understorey vegetation poses an excellent study system to investigate whether increases in resource availability lead to an increase in plant species richness.
Carsten F. Dormann, Maurizio Bagnara, Steffen Boch, Judith Hinderling, Andrea Janeiro-Otero, Deborah Schäfer, Peter Schall, Florian Hartig   +7 more
doaj   +1 more source

Multi-dimensional Sources Apportionment of PM2.5 in Zhongyuan Urban Agglomeration Based on the CAMx Mode

Aerosol and Air Quality Research, 2022
Based on the comprehensive air quality model with extensions (CAMx), the quantitative simulation was conducted on the transport impact of PM2.5 between Zhongyuan Urban Agglomeration and surrounding cities in 2017, and the contribution of 5 major emission
Jinyu He, Wenbo Xue, Li Yan, Xurong Shi, Yanchao Wang, Yu Lei, Yixuan Zheng, Yu Zhang   +7 more
doaj   +1 more source

The software for simulating the operation of the spherical nuclear reactor [PDF]

ITM Web of Conferences
The paper presents simulation of the processes of starting, operating and stopping a spherical nuclear reactor. A software package was developed. This makes it possible to visualize reactor’s dynamics and evaluate its characteristics. Mathematical models
Zaronov Danila, Provorny Ivan, Chumakov Ivan, Pokushko Mariia, Karaseva Margarita   +4 more
doaj   +1 more source

Using random forests to forecast daily extreme sea level occurrences at the Baltic Coast [PDF]

Natural Hazards and Earth System Sciences
We have designed a machine learning method to predict the occurrence of daily extreme sea level at the Baltic Sea coast with lead times of a few days. The method is based on a random forest classifier. It uses spatially resolved fields of daily sea level
K. Bellinghausen, B. Hünicke, E. Zorita
doaj   +1 more source

Existence of normalized solutions for the coupled elliptic system with quadratic nonlinearity

Advanced Nonlinear Studies, 2022
In the present paper, we study the existence of the normalized solutions for the following coupled elliptic system with quadratic nonlinearity −Δu−λ1u=μ1∣u∣u+βuvinRN,−Δv−λ2v=μ2∣v∣v+β2u2inRN,\left\{\begin{array}{ll}-\Delta u-{\lambda }_{1}u={\mu }_{1}| u|
Wang Jun, Wang Xuan, Wei Song
doaj   +1 more source

Drone Swarm Energy Management

Journal of Optimization, Differential Equations and Their Applications
This note presents an analytical framework for decision-making in drone swarm systems operating under uncertainty, based on the integration of Partially Observable Markov Decision Processes (POMDP) with Deep Deterministic Policy Gradient (DDPG ...
M. Z. Zgurovsky, P. O. Kasyanov, L. S. Paliichuk   +2 more
doaj   +1 more source

Modeling of well performance during oil reservoir development on the elastic-water-drive mode using regression analysis

Georesursy
One of the important tasks of analyzing oil field development is predicting well performance. For this purpose, displacement characteristics are often used, which represent the dependence of some indicators on others. To determine the parameters of these
I. V. Afanaskin, S. G. Volpin, V. A. Yudin, P. V. Kryganov, A. A. Glushakov   +4 more
doaj   +1 more source