Results 31 to 40 of about 357,436 (278)

Counting lattice points and o-minimal structures [PDF]

open access: yes, 2013
Let $\Lambda$ be a lattice in $\R^n$, and let $Z\subseteq \R^{m+n}$ be a definable family in an o-minimal structure over $\R$. We give sharp estimates for the number of lattice points in the fibers $Z_T={x\in \R^n: (T,x)\in Z}$.
Ambrosio   +36 more
core   +1 more source

Projection Measurement of the Maximally Entangled N-Photon State for a Demonstration of N-Photon de Broglie Wavelength

open access: yes, 2005
We construct a projection measurement process for the maximally entangled N-photon state (the NOON-state) with only linear optical elements and photodetectors.
Guo, G. C., Ou, Z. Y., Sun, F. W.
core   +1 more source

Orthogonal Matrix Retrieval in Cryo-Electron Microscopy

open access: yes, 2015
In single particle reconstruction (SPR) from cryo-electron microscopy (cryo-EM), the 3D structure of a molecule needs to be determined from its 2D projection images taken at unknown viewing directions.
Bhamre, Tejal, Singer, Amit, Zhang, Teng
core   +1 more source

Orthogonal Spatial Domain Subspace Projection Based Time-Varying Channel Estimation

open access: yesIEEE Access, 2020
Time-varying channel estimation is a well-known challenge for the wireless communications in the high mobility environments. In this paper, we propose a basis expansion model (BEM) based channel estimation algorithm utilizing orthogonal spatial domain ...
Rong Zeng, Qiang Huang, Hao Wang
doaj   +1 more source

A new result on recovery sparse signals using orthogonal matching pursuit

open access: yesStatistical Theory and Related Fields, 2022
Orthogonal matching pursuit (OMP) algorithm is a classical greedy algorithm widely used in compressed sensing. In this paper, by exploiting the Wielandt inequality and some properties of orthogonal projection matrix, we obtained a new number of ...
Xueping Chen   +2 more
doaj   +1 more source

Solution to the Mean King's problem with mutually unbiased bases for arbitrary levels [PDF]

open access: yes, 2006
The Mean King's problem with mutually unbiased bases is reconsidered for arbitrary d-level systems. Hayashi, Horibe and Hashimoto [Phys. Rev. A 71, 052331 (2005)] related the problem to the existence of a maximal set of d-1 mutually orthogonal Latin ...
A. S. Holevo   +10 more
core   +3 more sources

Network divergence analysis identifies adaptive gene modules and two orthogonal vulnerability axes in pancreatic cancer

open access: yesMolecular Oncology, EarlyView.
Tumors contain diverse cellular states whose behavior is shaped by context‐dependent gene coordination. By comparing gene–gene relationships across biological contexts, we identify adaptive transcriptional modules that reorganize into distinct vulnerability axes.
Brian Nelson   +9 more
wiley   +1 more source

Legendre polynomial order selection in projection pursuit density estimation

open access: yesLietuvos Matematikos Rinkinys, 2013
Projection pursuit method and its application to probability density estimation is discussed. Method proposed by J.H. Friedman, based on projection density estimation using orthogonal Legendre polynomials, is analysed.
Mindaugas Kavaliauskas
doaj   +1 more source

The orthogonal projection on slice functions on the quaternionic sphere

open access: yes, 2015
We study the $L^p$ norm of the orthogonal projection from the space of quaternion valued $L^2$ functions to the closed subspace of slice $L^2$ functions.Comment: 6 ...
Arcozzi, Nicola, Sarfatti, Giulia
core   +1 more source

Evaluation of in vitro toxicity of common phytochemicals included in weight loss supplements using 1H NMR spectroscopy

open access: yesFEBS Open Bio, EarlyView.
We investigated the toxicity of 12 active compounds commonly found in herbal weight loss supplements (WLS) using human liver and colon cell models. Epigallocatechin‐3‐gallate was the only compound showing significant toxicity. Metabolic profiling revealed protein degradation, disrupted energy and lipid metabolism suggesting that the inclusion of EGCG ...
Emily C. Davies   +3 more
wiley   +1 more source

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