Results 51 to 60 of about 2,178,860 (334)

Biermann interpolation of Birkhoff type

Journal of Numerical Analysis and Approximation Theory, 2005
If \(P_{0},P_{1},...,P_{r}\) and \(Q_{0},Q_{1},...,Q_{r}\) are Birkhoff univariate projectors which form the chains\[P_{0}\le P_{1}\le\dots\le P_{r},\quad Q_{0}\le Q_{1}\le\dots\le Q_{r},\]we can define the Biermann operator of Birkhoff type\[B_{r}^{B ...
Marius Birou
doaj   +2 more sources

Frequency Response Based Curve Fitting Approximation of Fractional–Order PID Controllers

International Journal of Applied Mathematics and Computer Science, 2019
Fractional-order PID (FOPID) controllers have been used extensively in many control applications to achieve robust control performance. To implement these controllers, curve fitting approximation techniques are widely employed to obtain integer-order ...
Bingi Kishore, Ibrahim Rosdiazli, Karsiti Mohd Noh, Hassam Sabo Miya, Harindran Vivekananda Rajah   +4 more
doaj   +1 more source

Loop Corrections in Non-Linear Cosmological Perturbation Theory [PDF]

, 1995
Using a diagrammatic approach to Eulerian perturbation theory, we analytically calculate the variance and skewness of the density and velocity divergence induced by gravitational evolution from Gaussian initial conditions, including corrections *beyond ...
Frieman, Joshua, Scoccimarro, Roman
core   +2 more sources

Mapping the evolution of mitochondrial complex I through structural variation

FEBS Letters, EarlyView.
Respiratory complex I (CI) is crucial for bioenergetic metabolism in many prokaryotes and eukaryotes. It is composed of a conserved set of core subunits and additional accessory subunits that vary depending on the organism. Here, we categorize CI subunits from available structures to map the evolution of CI across eukaryotes. Respiratory complex I (CI)
Dong‐Woo Shin, Tingting Chen, James A. Letts   +2 more
wiley   +1 more source

The approximation of Laplace-Stieltjes transforms with finite order

Journal of Inequalities and Applications, 2017
In this paper, we study the irregular growth of an entire function defined by the Laplace-Stieltjes transform of finite order convergent in the whole complex plane and obtain some results about λ-lower type.
Hong Yan Xu, San Yan Liu
doaj   +1 more source

Numerical Approximation of Fractional-Order Volterra Integrodifferential Equation

Journal of Function Spaces, 2020
Laplace transform is a powerful tool for solving differential and integrodifferential equations in engineering sciences. The use of Laplace transform for the solution of differential or integrodifferential equations sometimes leads to the solutions in ...
Xiaoli Qiang, Kamran, Abid Mahboob, Yu-Ming Chu   +3 more
doaj   +1 more source

Higher-order properties of approximate estimators [PDF]

Journal of Econometrics, 2013
Many modern estimation methods in econometrics approximate an objective function, for instance, through simulation or discretization. These approximations typically affect both bias and variance of the resulting estimator. We first provide a higher-order expansion of such "approximate" estimators that takes into account the errors due to the use of ...
Kristensen, Dennis, Salanie, Bernard
openaire   +8 more sources

In situ molecular organization and heterogeneity of the Legionella Dot/Icm T4SS

FEBS Letters, EarlyView.
We present a nearly complete in situ model of the Legionella Dot/Icm type IV secretion system, revealing its central secretion channel and identifying new components. Using cryo‐electron tomography with AI‐based modeling, our work highlights the structure, variability, and mechanism of this complex nanomachine, advancing understanding of bacterial ...
Przemysław Dutka, Yuxi Liu, Stefano Maggi, Debnath Ghosal, Jue Wang, Prashant P. Damke, Stephen D. Carter, Wei Zhao, Sukhithasri Vijayrajratnam, Joseph P. Vogel, Carrie L. Shaffer, Grant J. Jensen   +11 more
wiley   +1 more source

Approximation of Fractional Order PI^λD^μ-Controller Transfer Function Using Chain Fractions

Energies, 2022
The approximation of a fractional order PIλDμ-controller transfer function using a chain fraction theory is considered. Analytical expressions for the approximation of s±α components of the transfer functions of PIλDμ-controllers were obtained through ...
Yaroslav Marushchak, Damian Mazur, Bogdan Kwiatkowski, Bohdan Kopchak, Tadeusz Kwater, Maciej Koryl   +5 more
doaj   +1 more source

Dynamical Spin Squeezing via Higher Order Trotter-Suzuki Approximation

, 2014
Here we provide a scheme of transforming the one-axis twisting Hamiltonian into the two-axis twisting one based on high order Trotter-Suzuki Approximation. Compared with the paper [Y. C. Liu et al., Phys. Rev. Lett.
Guo, Guang-Can, Zhang, Ji-Ying, Zhou, Xiang-Fa, Zhou, Zheng-Wei   +3 more
core   +1 more source