نتایج جستجو برای: روش qr

تعداد نتایج: 374094  

2009
Judith Redi Hantao Liu Hani Alers Rodolfo Zunino Ingrid Heynderickx

The Single Stimulus (SS) method is often chosen to collect subjective data testing no-reference objective metrics, as it is straightforward to implement and well standardized. At the same time, it exhibits some drawbacks; spread between different assessors is relatively large, and the measured ratings depend on the quality range spanned by the test samples, hence the results from different expe...

2013
Kwon-Jae Park Jong Soo Woo Jung Hoon Yi Jong Yoon Park

BACKGROUND Mitral valve repair for posterior mitral leaflet (PML) prolapse has been considered to be a standard treatment because of its high success rate and high level of patient satisfaction. The aim of this study was to evaluate the clinical results of two different techniques of PML prolapse, quadrangular resection (QR) and chordal replacement (CR). MATERIALS AND METHODS The subjects con...

2016
M. Mary Shanthi Rani

The art of information hiding has become an important issue in the recent years as security of information has become a big concern in this internet era. Cryptography and Steganography play major role for secured data transfer. Steganography stands for concealed writing; it hides the message inside a cover medium. Cryptography conceals the content of a message by encryption. QR (Quick Response)...

2010
J. Michael Gaziano Anthony H. Cincotta Christopher M. O'Connor Michael Ezrokhi Dean Rutty Z.J. Ma Richard E. Scranton

OBJECTIVE Quick-release bromocriptine (bromocriptine-QR), a D2 dopamine receptor agonist, is indicated as a treatment for type 2 diabetes. The Cycloset Safety Trial, a 52-week, randomized, double-blind, multicenter trial, evaluated the overall safety and cardiovascular safety of this novel therapy for type 2 diabetes. RESEARCH DESIGN AND METHODS A total of 3,095 patients with type 2 diabetes ...

Journal: :J. Parallel Distrib. Comput. 2015
Mathieu Faverge Julien Herrmann Julien Langou Bradley R. Lowery Yves Robert Jack J. Dongarra

This paper introduces hybrid LU–QR algorithms for solving dense linear systems of the form Ax = b. Throughout a matrix factorization, these algorithms dynamically alternate LU with local pivoting and QR elimination steps based upon some robustness criterion. LU elimination steps can be very efficiently parallelized, and are twice as cheap in terms of floating-point operations, as QR steps. Howe...

2015
Lakshmi Sundararajan Megan L Norris Erik A Lundquist

The Q neuroblasts in Caenorhabditis elegans display left-right asymmetry in their migration, with QR and descendants on the right migrating anteriorly, and QL and descendants on the left migrating posteriorly. Initial QR and QL migration is controlled by the transmembrane receptors UNC-40/DCC, PTP-3/LAR, and the Fat-like cadherin CDH-4. After initial migration, QL responds to an EGL-20/Wnt sign...

2009
Chien-Hung Pan

In multiple-input multiple-output (MIMO) channel (H) communication, when channel status information (CSI) is known to the receiver but not to the transmitter, the precoding technique can achieve a highly reliable communication link, when the receiver informs an optimal precoding matrix index to the transmitter based on current CSI. To select an optimal precoding matrix (F), the maximum capacity...

Journal: :CoRR 2014
Yong Li Qianbin Chen Hongqing Liu Trieu-Kien Truong

In this paper, the performance of quadratic residue (QR) codes of lengths within 100 is given and analyzed when the hard decoding, soft decoding, and linear programming decoding algorithms are utilized. We develop a simple method to estimate the soft decoding performance, which avoids extensive simulations. Also, a simulation-based algorithm is proposed to obtain the maximum likelihood decoding...

Journal: :Journal of Chemical Theory and Computation 2021

We describe the implementation of a Monte Carlo basin hopping (BH) global optimization procedure for prediction molecular crystal structures. The BH method is combined with quasi-random (QR) structure generation in hybrid prediction, QR-BH, which combines low-discrepancy sampling provided by QR sequences efficiency at locating low energy Through tests on set single-component crystals and co-cry...

Journal: :SIAM J. Matrix Analysis Applications 2006
Roden J. A. David David S. Watkins

We present an efficient implementation of the multi-shift QR algorithm for computing the eigenvalues of a unitary matrix. The algorithm can perform QR iterations of arbitrary degree, it is conceptually simple, and it is backward stable.

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