Results 21 to 30 of about 21,684,555 (310)

An Assessment of the Spatial Diversification of Agriculture in the Conditions of the Circular Economy in European Union Countries

open access: yesAgriculture, 2023
The level of agricultural development in European Union countries is characterized by great diversity. This is due to differences in natural conditions, the type of agricultural production, agrarian fragmentation, and the level of economic development ...
Renata Matysik-Pejas   +6 more
doaj   +1 more source

Boundedness control sets for linear systems on Lie groups

open access: yesOpen Mathematics, 2018
Let Σ be a linear system on a connected Lie group G and assume that the reachable set 𝓐 from the identity element e ∈ G is open. In this paper, we give an algebraic condition to warrant the boundedness of the existent control set with a nonempty interior
Ayala Víctor, Todco María Torreblanca
doaj   +1 more source

Developing a New Storage Format and a Warp-Based SpMV Kernel for Configuration Interaction Sparse Matrices on the GPU

open access: yesComputation, 2018
Sparse matrix-vector multiplication (SpMV) can be used to solve diverse-scaled linear systems and eigenvalue problems that exist in numerous, and varying scientific applications.
Mohammed Mahmoud   +2 more
doaj   +1 more source

Sampled-Data Cooperative Control of Multi-agent Systems:From Linear System to Nonlinear System

open access: yesNantong Daxue xuebao. Ziran kexue ban, 2020
Multi-agent system has become the research focus of artificial intelligence with the intersection and development of multiple disciplines. The sampled-data cooperative control of multi-agent system is regarded as the common solution to the engineering ...
CAO Kecai; GU Juping; HUA Liang; ZHAO Fengshen; ZHOU Baijun
doaj   +1 more source

An Elastic-Window-Based Method for the Underdetermined Problem in Linear Spectral Unmixing to Enhance the Spatial Resolution of the Normalized Difference Vegetation Index Time Series

open access: yesApplied Sciences, 2023
Inverting land cover reflectance or derived indices from low-spatial-resolution images to refine the spatial resolution of this data is cost-effective for land surface monitoring applications that face technical or budget limitations. Based on the linear
Boyu Liu, Yushuo Zhang
doaj   +1 more source

Linear Filters and Non-Linear Systems

open access: yesJournal of the Royal Statistical Society Series B: Statistical Methodology, 1992
SUMMARY It has been asserted in the literature that the low pass filtering of time series data may lead to erroneous results when calculating attractor dimensions. Here we prove that finite order, non-recursive filters do not have this effect. In fact, a generic, finite order, non-recursive filter leaves invariant all the quantities that
Broomhead, D. S.   +2 more
openaire   +2 more sources

Application of fractional-order nonlinear equations in coordinated control of multi-agent systems

open access: yesNonlinear Engineering, 2023
In order to solve the coordinated operation of voltage and frequency of microgrids and achieve effective distribution of output power, we propose the application of fractional-order nonlinear equations in coordination.
Jia Xiaojian   +5 more
doaj   +1 more source

Transformations of the matrices of linear systems to their canonical form with desired eigenvalues [PDF]

open access: yesBulletin of the Polish Academy of Sciences: Technical Sciences, 2023
A new approach to the transformations of the matrices of linear continuous-time systems to their canonical forms with desired eigenvalues is proposed.
Tadeusz Kaczorek
doaj   +1 more source

Hamiltonian and Variational Linear Distributed Systems [PDF]

open access: yes, 2002
We use the formalism of bilinear- and quadratic differential forms in order to study Hamiltonian and variational linear distributed systems. It was shown in [1] that a system described by ordinary linear constant-coefficient differential equations is ...
Rapisarda, P.   +7 more
core   +3 more sources

Singularity Excitations and Initial Value Problem in Continuous LTI Systems

open access: yesIEEE Access, 2020
A modern challenge in electrical engineering education is to keep the math at a sufficient level, with a goal to find an optimal balance between calculus competence and operative skills needed for real-life technical applications. It is not uncommon that
Milan M. Ponjavic, Tomislav B. Sekara
doaj   +1 more source

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