نتایج جستجو برای: measurement matrix

تعداد نتایج: 792923  

Journal: :IEICE Electronic Express 2011
Guan Gui Abolfazl Mehbodniya Qun Wan Fumiyuki Adachi

Orthogonal matching pursuit (OMP) algorithm with random measurement matrix (RMM), often selects an incorrect variable due to the induced coherent interference between the columns of RMM. In this paper, we propose a sensing measurement matrix (SMM)-OMP which mitigates the coherent interference and thus improves the successful recovery probability of signal. It is shown that the SMM-OMP selects a...

2010
Sina Jafarpour Robert E. Schapire Volkan Cevher

We introduce the MUSE Algorithm and prove that for any ksparse vector α∗, any measurement matrix Φ, and any noise vector ε, given f = Φα∗ + ε, the proposed algorithm finds a k-sparse vector α̂ such that ∥Φα̂−f∥∞ ≤ ∥ε∥∞+O ( 1 √ k ) . The proposed algorithm is based on reformulating the sparse approximation problem as a zero-sum game over a properly chosen new space. If the projection matrix satisf...

Journal: :Journal of the Optical Society of America. A, Optics, image science, and vision 2007
Yingsong Hu Jiangtao Xi Joe Chicharo Zongkai Yang

We present an algorithm for estimating the color demixing matrix based on the color fringe patterns captured from the reference plane or the surface of the object. The advantage of this algorithm is that it is a blind approach to calculating the demixing matrix in the sense that no extra images are required for color calibration before performing profile measurement. Simulation and experimental...

2010
Yipeng Liu Qun Wan Fei Wen Jia Xu Yingning Peng

Compressive sensing (CS) is a technique for estimating a sparse signal from the random measurements and the measurement matrix. Traditional sparse signal recovery methods have seriously degeneration with the measurement matrix uncertainty (MMU). Here the MMU is modeled as a bounded additive error. An anti-uncertainty constraint in the form of a mixed 2  and 1  norm is deduced from the sparse ...

One of unsolved problems in quantum measurement theory is to characterize coexistence of quantum effects. In this paper, applying positive operator matrix theory, we give a mathematical characterization of the witness set of coexistence of quantum effects and obtain a series of properties of coexistence. We also devote to characterizing bijective morphisms on quantum effects leaving the witness...

Journal: :Automatica 1996
Jacob van der Woude

A selection of these reports is available in PostScript form at the Faculty's anonymous ftp-Abstract Structured transfer matrix systems are linear systems given by transfer matrices of which the innnite pole order of each nonzero entry is known, while the associated innnite gains are unknown and assumed mutually independent. In this paper necessary and suucient conditions are derived for the ge...

Journal: :Physical review letters 2012
C D Herold V D Vaidya X Li S L Rolston J V Porto M S Safronova

We present a method for accurate determination of atomic transition matrix elements at the 10(-3) level. Measurements of the ac Stark (light) shift around "magic-zero" wavelengths, where the light shift vanishes, provide precise constraints on the matrix elements. We make the first measurement of the 5s - 6p matrix elements in rubidium by measuring the light shift around the 421 and 423 nm zero...

Journal: :Applied optics 1984
K J Voss E S Fry

The normalized light scattering polarization matrix has been measured for ocean water using an electrooptic light scattering polarimeter. Measurements were done on samples from the Atlantic and Pacific Oceans and the Gulf of Mexico. The polarization effects in the matrices were found to have, in general, a form which is similar to polarization effects in the Rayleigh scattering approximation; f...

Journal: :Physical review letters 2015
M Hettrich T Ruster H Kaufmann C F Roos C T Schmiegelow F Schmidt-Kaler U G Poschinger

We demonstrate a method to determine dipole matrix elements by comparing measurements of dispersive and absorptive light ion interactions. We measure the matrix element pertaining to the Ca II H line, i.e., the 4(2)S(1/2)↔4(2)P(1/2) transition of (40)Ca(+), for which we find the value 2.8928(43) ea(0). Moreover, the method allows us to deduce the lifetime of the 4(2)P(1/2) state to be 6.904(26)...

Journal: :iran agricultural research 2012
b. ghahraman s. omidi a. khoshnood yazdi

measurement of soil saturated hydraulic conductivity, ks, is normally affected by flow patterns such as macro pore; however, most current techniques do  not differentiate flow types, causing major problems in describing water and chemical flows within the soil matrix. this study compares eight models for scaling ks and predicted matrix and macro pore ks, using a database composed of 50 datasets...

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