Results 21 to 30 of about 5,657,828 (286)

Using Sigmoid Growth Models to Simulate Greenhouse Tomato Growth and Development

open access: yesHorticulturae, 2022
Mathematical modeling has been used to describe the characteristics of crop growth. Establishing a growth model can help to better understand the responses of crops to their environment and improve the efficiency of agricultural production.
Shih-Lun Fang   +6 more
doaj   +1 more source

On quasilinear elliptic problems with finite or infinite potential wells

open access: yesOpen Mathematics, 2021
We consider quasilinear elliptic problems of the form −div(ϕ(∣∇u∣)∇u)+V(x)ϕ(∣u∣)u=f(u),u∈W1,Φ(RN),-{\rm{div}}\hspace{0.33em}(\phi \left(| \nabla u| )\nabla u)+V\left(x)\phi \left(| u| )u=f\left(u),\hspace{1.0em}u\in {W}^{1,\Phi }\left({{\mathbb{R}}}^{N}),
Liu Shibo
doaj   +1 more source

Infinite-randomness quantum Ising critical fixed points [PDF]

open access: yes, 1999
We examine the ground state of the random quantum Ising model in a transverse field using a generalization of the Ma-Dasgupta-Hu renormalization group (RG) scheme.
Fisher, Daniel S.   +3 more
core   +2 more sources

Critical points and resonance of hyperplane arrangements [PDF]

open access: yes, 2009
If F is a master function corresponding to a hyperplane arrangement A and a collection of weights y, we investigate the relationship between the critical set of F, the variety defined by the vanishing of the one-form w = d log F, and the resonance of y ...
A. Varchenko   +31 more
core   +5 more sources

Comparative analysis of limit standards for contaminants in edible vegetable oils between domestic and international regulations

open access: yesZhongguo shipin weisheng zazhi
This paper conducts a comprehensive comparison and analysis of domestic and international standards pertaining to high-risk contaminants in edible vegetable oils, including solvent residues, polycyclic aromatic hydrocarbons, mycotoxins, heavy metals, 3 ...
GAO Yuan   +6 more
doaj   +1 more source

Existence of Nontrivial Solutions for Sixth-Order Differential Equations

open access: yesMathematics, 2021
We show the existence of at least one nontrivial solution for a nonlinear sixth-order ordinary differential equation is investigated. Our approach is based on critical point theory.
Gabriele Bonanno   +2 more
doaj   +1 more source

Critical Points Extraction from Building Façades by Analyzing Gradient Structure Tensor

open access: yesRemote Sensing, 2021
This paper proposes a building façade contouring method from LiDAR (Light Detection and Ranging) scans and photogrammetric point clouds. To this end, we calculate the confidence property at multiple scales for an individual point cloud to measure the ...
Dong Chen   +6 more
doaj   +1 more source

Non-equilibrium conductivity at quantum critical points [PDF]

open access: yes, 2013
Quantum criticality provides an important route to revealing universal non-equilibrium behaviour. A canonical example of a quantum critical point is the Bose-Hubbard model, which we study under the application of an electric field.
Berridge, A. M., Green, A. G.
core   +2 more sources

Qualitative Analysis of the Dynamics of a Two-Component Chiral Cosmological Model

open access: yesUniverse, 2020
We present a qualitative analysis of chiral cosmological model (CCM) dynamics with two scalar fields in the spatially flat Friedman–Robertson–Walker Universe.
Viktor Zhuravlev, Sergey Chervon
doaj   +1 more source

Sets of Fractional Operators and Numerical Estimation of the Order of Convergence of a Family of Fractional Fixed-Point Methods

open access: yesFractal and Fractional, 2021
Considering the large number of fractional operators that exist, and since it does not seem that their number will stop increasing soon at the time of writing this paper, it is presented for the first time, as far as the authors know, a simple and ...
A. Torres-Hernandez, F. Brambila-Paz
doaj   +1 more source

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