Results 41 to 50 of about 307,424 (289)

Systems of quadratic forms II

open access: yesRocky Mountain Journal of Mathematics, 1984
[For part I see Bull. Soc. Math. Fr., Suppl., Mèm. 59, 115-123 (1979; Zbl 0407.10017).] Ein System von r quadratischen Formen in n Variablen über einem Körper F wird als quadratische Abbildung \(q: V\to W\) aufgefaßt, wobei \(\dim_ F V=n\), \(\dim_ F W=r\) ist.
openaire   +3 more sources

A method for computing quadratic Brunovsky forms

open access: yes, 2005
In this paper, for continuous, linearly-controllable quadratic control systems with a single input, an explicit, constructive method is proposed for studying their Brunovsky forms, initially studied in [W. Kang and A. J.
Jin, Wen-Long
core   +3 more sources

Detection of LFM Radar Signals and Chirp Rate Estimation Based on Time-Frequency Rate Distribution

open access: yesSensors, 2021
Linear frequency-modulated (LFM) signals are the most significant example of waveform used in low probability of intercept (LPI) radars, synthetic aperture radars and modern communication systems.
Ewa Swiercz   +2 more
doaj   +1 more source

Hermitian Forms and Systems of Quadratic Forms

open access: yesDocumenta Mathematica, 2018
We associate to every symmetric (antisymmetric) Hermitian form a system of quadratic forms over the base field which determines its isotropy and metabolicity behaviour. It is shown that two even Hermitian forms are isometric if and only if their associated systems are equivalent.
openaire   +2 more sources

Parameterization of Some Control Problems by Linear Systems

open access: yesИзвестия Иркутского государственного университета: Серия "Математика", 2019
In the framework of control parameterization methods a number of optimization problems of linear phase systems with quadratic and bilinear functionals is considered.
V.A. Srochko, E.V. Aksenyushkina
doaj   +1 more source

Sequence determinants of RNA G‐quadruplex unfolding by Arg‐rich regions

open access: yesFEBS Letters, EarlyView.
We show that Arg‐rich peptides selectively unfold RNA G‐quadruplexes, but not RNA stem‐loops or DNA/RNA duplexes. This length‐dependent activity is inhibited by acidic residues and is conserved among SR and SR‐related proteins (SRSF1, SRSF3, SRSF9, U1‐70K, and U2AF1).
Naiduwadura Ivon Upekala De Silva   +10 more
wiley   +1 more source

A quadratic approximation of AC power flows in transformed polar coordinates

open access: yese-Prime: Advances in Electrical Engineering, Electronics and Energy
A mathematical model is the backbone of any computer-aided simulation. In electrical power systems, the well-known AC power flow equations provide the foundation for deriving various mathematical models.
Wilson González-Vanegas   +1 more
doaj   +1 more source

Weyl's inequality and systems of forms

open access: yes, 2014
By providing a variant of Weyl's inequality for general systems of forms we establish the Hardy-Littlewood asymptotic formula for the density of integer zeros of systems of quadratic or cubics forms under weaker rank conditions than previously known.
Dietmann, Rainer
core   +1 more source

LDAcoop: Integrating non‐linear population dynamics into the analysis of clonogenic growth in vitro

open access: yesMolecular Oncology, EarlyView.
Limiting dilution assays (LDAs) quantify clonogenic growth by seeding serial dilutions of cells and scoring wells for colony formation. The fraction of negative wells is plotted against cells seeded and analyzed using the non‐linear modeling of LDAcoop.
Nikko Brix   +13 more
wiley   +1 more source

On solutions of certain compatible systems of quadratic trinomial Partial differential-difference equations

open access: yesМатематичні Студії
This paper has involved the use of a variety of variations of the Fermat-type equation $f^n(z)+g^n(z)=1$, where $n(\geq 2)\in\mathbb{N}$. Many researchers have demonstrated a keen interest to investigate the Fermat-type equations for entire and ...
R. Mandal, R. Biswas
doaj   +1 more source

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