نتایج جستجو برای: ring projection transform rpt
تعداد نتایج: 298467 فیلتر نتایج به سال:
The pulsatile motion artifacts in the radial spin-echo diffusion-weighted-imaging (rSE-DWI) are analyzed and a method to improve the image quality of the rSE-DWI using the projection data regeneration method is proposed in this work. In general, ECG-triggering is used together with the rSE-DWI in order to prevent the loss of projection data, where the amount of loss depends on the data acquisit...
The Hough transform is a projection-based transform which can be used to detect shapes in images. One of the disadvantages of the transform is its requirement for large amounts of computing power. Parallel machines have given programmers the potential for incredible computing power. To obtain maximum performance from parallel machines, parallel algorithms should be designed to reflect the archi...
Optical verification systems can make image hide in high-security phase key through the phase retrieval operation Conventionally, optical verification systems based on the joint transform correlator usually use Fourier transform. In this paper we propose the joint Fresnel transform architecture and use the methods of the projection onto constraint set and nonlinear transform to determine the p...
The 26S proteasome is a 2.5-MDa, ATP-dependent multisubunit proteolytic complex that processively destroys proteins carrying a degradation signal. The proteasomal ATPase heterohexamer is a key module of the 19S regulatory particle; it unfolds substrates and translocates them into the 20S core particle where degradation takes place. We used cryoelectron microscopy single-particle analysis to obt...
Kanade [1] proposed a heuristic for interpreting shape from contour. To apply his heuristic, skewed symmetries have to be found. In this paper, an algorithm for finding skewed symmetries in a planar point set is proposed. The method requires a simple rotation and midpoint finding, followed by a Hough transform. A variant of the Hough transform is reported. It is based on interpreting it as a ro...
INTRODUCTION Cognitive behavioral therapy (CBT) and U.S. Food and Drug Administration (FDA)-recommended pharmacologic treatments (RPTs; pregabalin, duloxetine, and milnacipran) are effective treatment options for fibromyalgia (FM) syndrome and are currently recommended by clinical guidelines. We compared the cost-utility from the healthcare and societal perspectives of CBT versus RPT (combinati...
The regulatory particle (RP) of the 26S proteasome contains a heterohexameric ring of AAA-ATPases (RPT1-6) that unfolds and inserts substrates into the core protease (CP) for degradation. Through genetic analysis of the Arabidopsis thaliana gene pair encoding RPT2, we show that this subunit plays a critical role in 26S proteasome assembly, histone dynamics, and plant development. rpt2a rpt2b do...
In shape reconstruction, the celebrated Fourier slice theorem plays an essential role. By virtue of the relation between the Radon transform, the Fourier transform and the 2-dimensional inverse Fourier transform, the shape of an object can be reconstructed from the knowledge of the object’s Radon transform. Unfortunately, a discrete implementation requires the use of interpolation techniques, s...
مقدمه : جراحی رینوپلاستی امروزه یکی از شایعترین اعمال جراحی زیبایی در ایران می باشد که در آن علاوه بر مهارتهای تکنیکی جراح، دارا بودن دانش کامل از وضعیت آناتومیکی ناحیه از اهمیت بسزایی برخوردار است. لذا مطالعه حاضر بر پایه اندازه گیری میزان nasal tip projection در بیماران متقاضی جراحی رینوپلاستی جهت دستیابی به اطلاعات آناتومیک دقیق در بیماران ایرانی طرح ریزی شده است . مواد و روشها: در این مطال...
We transform the 3D underwater positioning problem into its 2D counterpart via a projection technique that employs depth information available to underwater sensors. After showing that a non-degenerative projection preserves network localizability, we present a purely distributed localization scheme termed USP for underwater acoustic sensor networks. In USP, reference nodes are projected to the...
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