نتایج جستجو برای: pagat polymer

تعداد نتایج: 93037  

2012
N. Gopishankar S. Vivekanandhan A. Jirasek S. S. Kale G. K. Rath Sanjay Thulkar R. K. Bisht

Gel dosimetry is a promising technique for the implementation of 3D dose verification within the radiation therapy clinic, since it is the only methodology which provides comprehensive 3D dose measurement of conformal treatments such as Intensity Modulated Radiation Therapy (IMRT), Stereotactic radiosurgery (SRS) and Stereotactic Radiotherapy (SRT), and volumetric arc therapies (VMAT). In polym...

2013
S. Khoei J. V. Trapp C. M. Langton

In this work we use a 3D quantitative CT imaging ultrasound system to characterise polymer gel dosimeters. The system comprises of two identical 5 MHz 128 element phasedarray ultrasound transducers co-axially aligned and submerged in water as a coupling agent. Rotational and translational movement of the gel dosimeter sample between the transducers were performed using a robotic arm. Ultrasound...

پایان نامه :دانشگاه آزاد اسلامی - دانشگاه آزاد اسلامی واحد تهران مرکزی - دانشکده علوم پایه 1390

abstract in this study, we synthesized a novel template polymer by using methacrylic acid (mma) as functional monomer, ethylene glycol dimethacrylate(egdma) as cross linker, 2,2-azobisisobutyronitrile (aibn) as initiator and olanzapine as targeted molecule in the presence of chloroform and acetonitrile as solvent. the products have been characterized and confirmed by (chn)elemental analysis,...

Journal: :Complex Systems 1991
Wray L. Buntine Andreas S. Weigend

Connectionist feed-forward networks, t rained with backpropagat ion, can be used both for nonlinear regression and for (discrete one-of-C ) classification. This paper presents approximate Bayesian meth ods to statistical components of back-propagat ion: choosing a cost funct ion and penalty term (interpreted as a form of prior probability), pruning insignifican t weights, est imat ing the uncer...

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