نتایج جستجو برای: نویزهای ccd
تعداد نتایج: 9225 فیلتر نتایج به سال:
OBJECTIVE To compare the detection of microcalcifications on mammograms of an anthropomorphic breast phantom acquired by a direct digital flat-panel detector mammography system (FPM) versus a stereotactic breast biopsy system utilizing CCD (charge-coupled device) technology with either a 1024 or 512 acquisition matrix (1024 CCD and 512 CCD). MATERIALS AND METHODS Randomly distributed silica b...
OBJECTIVES To compare the usefulness of a CCD camera with infrared illumination (IR-CCD camera) over Frenzel glasses (F Glasses) for the observation of spontaneous nystagmus, the incidence and direction of nystagmus, and the frequency, amplitude and slow phase of spontaneous nystagmus. METHODS One hundred vertiginous patients, fifty-three females and forty-seven males participated in this stu...
We introduce an excited state theory for the optimized orbital coupled cluster doubles ~OO-CCD! and valence optimized orbital coupled cluster doubles ~VOO-CCD! models. The equations for transition energies are derived using a similarity transformed Hamiltonian. The effects of orbital relaxation are discussed. We present results for several single-reference molecules (H2O, CH2O, C2H4O, C2H4, BeO...
Cleidocranial dysplasia (CCD) is an autosomal dominant, generalized skeletal dysplasia in humans that has been mapped to the short arm of chromosome 6. We report linkage of a CCD mutation to 6p21 in a large family and exclude the bone morphogenetic protein 6 gene (BMP6) as a candidate for the disease by cytogenetic localization and genetic recombination. CCD was linked with a maximal two-point ...
We discuss diagrammatic modifications to the coupled cluster doubles (CCD) equations, wherein different groups of terms out of rings, ladders, crossed-rings, and mosaics can be removed to form approximations to the coupled cluster method, of interest due to their similarity with various types of random phase approximations. The finite uniform electron gas (UEG) is benchmarked for 14- and 54-ele...
Changes in transcript abundance relating to colony collapse disorder in honey bees (Apis mellifera).
Colony collapse disorder (CCD) is a mysterious disappearance of honey bees that has beset beekeepers in the United States since late 2006. Pathogens and other environmental stresses, including pesticides, have been linked to CCD, but a causal relationship has not yet been demonstrated. Because the gut acts as a primary interface between the honey bee and its environment as a site of entry for p...
We investigated the effects of chronic compression (CCD) of the L3 and L4 dorsal root ganglion (DRG) on pain behavior in the mouse and on the electrophysiological properties of the small-diameter neuronal cell bodies in the intact ganglion. CCD is a model of human radicular pain produced by intraforaminal stenosis and other disorders affecting the DRG, spinal nerve, or root. On days 1, 3, 5, an...
BACKGROUND Over the last two winters, there have been large-scale, unexplained losses of managed honey bee (Apis mellifera L.) colonies in the United States. In the absence of a known cause, this syndrome was named Colony Collapse Disorder (CCD) because the main trait was a rapid loss of adult worker bees. We initiated a descriptive epizootiological study in order to better characterize CCD and...
When solving the control co-design (CCD) problem using simultaneous strategy in a deterministic manner, uncertainty stemming from stochastic design variables is ignored, and might have negative influence on performance of dynamic system. In attempting to overcome undesirable effect uncertainty, this research investigates reliability-based (RB-CCD) presents single-loop framework for RB-CCD based...
در سالهای اخیر ارسال اطلاعات مخابراتی سرعت بالا از طریق کانال انتقال قدرت (Power Line Communication) بیشتر مورد توجه محققین در عرصه مخابرات قرار گرفتهاست. در این مقاله یک الگوریتم مناسب برای تخمین کانال PLC با استفاده از مالتیپلکس تقسیم فرکانسی متعامد (Orthogonal Frequency Division Multiplexing)ارائه شدهاست. کانال PLC با ویژگیهای فیدینگ چندمسیره و فرکانسگزین تحتتأثیر نویزهای ضربهای بود...
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