نتایج جستجو برای: hdr

تعداد نتایج: 2738  

ارژنگ شاهور سعید حمیدی, عبدالرضا سلیمانیان غلامرضا رئیس علی, مصطفی غفوری معصومه دهقانی مقدم کوروش اربابی

اتاقک‌های یونش چاهکدار مرتبط با هوای آزاد در مراکز پرتو درمانی برای اندازه‌گیری شدت چشمه‌های براکی تراپی به کار می‌روند. در این کار پژوهشی با استفاده از کد مونت کارلوی MCNP-4C، اتاقک یونش چاهکدار مدل HDR-33004 شبیه‌سازی شده است. پاسخ اتاقک (جریان الکتریکی) شبیه‌سازی شده برای مکانهای مختلف چشمه در طول محور مرکزی اتاقک، رفتار مشابهی با نتایج حاصل از اندازه‌گیری‌ داشت و مکان مرجع اندازه‌گیری در ات...

Journal: :Journal of Experimental & Clinical Cancer Research : CR 2009
Gustavo A Viani Gustavo B Manta Eduardo J Stefano Ligia I de Fendi

BACKGROUND The literature supporting high-dose rate brachytherapy (HDR) in the treatment of cervical carcinoma derives primarily from retrospective series. However, controversy still persists regarding the efficacy and safety of HDR brachytherapy compared to low-dose rate (LDR) brachytherapy, in particular, due to inadequate tumor coverage for stage III patients. Whether LDR or HDR brachytherap...

2007
Nicolas Menzel Michael Guthe

In theory HDR photography generated from exposure sequences is limited to pictures of still scenes preferably taken with the camera mounted on a tripod. Current state-of-the-art HDR imaging software relaxes this limitation by aligning the pictures with affine transformations. However, two pictures cannot be aligned with a single affine transformation if objects in the scene move or the position...

2016
Orazio Gallo Pradeep Sen

High-dynamic-range (HDR) images can be created with standard camera hardware by capturing and combining multiple pictures, each sampling a different segment of the irradiance distribution of a scene. This seemingly straightforward process involves several important steps, which will be the focus of this chapter. We start by examining the problem of selecting the set of exposures that properly m...

2011
Martin Cadík Tunç Ozan Aydin Karol Myszkowski Hans-Peter Seidel

In this paper we propose a new dataset for evaluation of image/video quality metrics with emphasis on applications in computer graphics. The proposed dataset includes LDR-LDR, HDR-HDR, and HDR-LDR reference-test video pairs with various types of distortions. We also present an example evaluation of recent image and video quality metrics that were applied in the field of computer graphics. In th...

Journal: :International journal of recent technology and engineering 2021

In this digital world, everything including documents, notes is kept in form. The requirement of converting these documents into processed information demand. This process called as Handwritten digit recognition (HDR). scan document and classified to identify the hand written words text so that it can be used keep format means computerized font everybody read properly. paper, discussed classifi...

Journal: :The British journal of nutrition 2016
Qing Ye Xin Hong Zhiyong Wang Huafeng Yang Xupeng Chen Hairong Zhou Chenchen Wang Yichao Lai Liuyuan Sun Fei Xu

We evaluated the reproducibility and validity of an FFQ used in a Chinese community-based nutrition and health survey. A total of ninety-nine males and 104 females aged 31-80 years completed four three consecutive 24-h dietary recalls (24-HDR, served as a reference method, one three consecutive 24-HDR for each season) and two FFQ (FFQ1 and FFQ2) over a 1-year interval. The reproducibility of th...

Journal: :Biochemistry 2007
Nils Hamann Gerd J Mander Jacob E Shokes Robert A Scott Marina Bennati Reiner Hedderich

Heterodisulfide reductase (HDR) of methanogenic archaea with its active-site [4Fe-4S] cluster catalyzes the reversible reduction of the heterodisulfide (CoM-S-S-CoB) of the methanogenic coenzyme M (CoM-SH) and coenzyme B (CoB-SH). CoM-HDR, a mechanistic-based paramagnetic intermediate generated upon half-reaction of the oxidized enzyme with CoM-SH, is a novel type of [4Fe-4S]3+ cluster with CoM...

Journal: :NeuroImage 2004
Seniha Inan Teresa Mitchell Allen Song Joshua Bizzell Aysenil Belger

We examined the effects of stimulus repetition upon the evoked hemodynamic response (HDR) in auditory and visual cortices measured by magnetic resonance imaging in two experiments. Experiment 1 focused on the effects of the interval duration between two identical stimuli on HDR. Pure auditory tones (1000 Hz) of 100-ms duration were presented singly or in pairs with intrapair intervals (IPIs: on...

2010
Feng Lu Xiangyang Ji Qionghai Dai Guihua Er

In traditional 3D model reconstruction, the texture information is captured in a certain dynamic range, which is usually insufficient for rendering under new environmental light. This paper proposes a novel approach for multi-view stereo (MVS) reconstruction of models with high dynamic range (HDR) texture. In the proposed approach, multi-view images are firstly taken with different exposure tim...

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