نتایج جستجو برای: 261 and 226
تعداد نتایج: 16829260 فیلتر نتایج به سال:
The existence of memory hierarchies are one of the most fundamental differences between the “classical” von Neumann model of computation and modern hardware. Therefore algorithms that take memory hierarchies into account have been intensively studied in recent years. This paper surveys basic algorithmic techniques for taking memory hierarchies into account and gives pointers to more detailed ov...
The photodissociation dynamics of state selected OD radicals has been examined at 243 and 226 nm using velocity map imaging to probe the angle–speed distributions of the D(S) and O(P2) products. Both experiment and complementary first principle calculations demonstrate that photodissociation occurs by promotion of OD from high vibrational levels of the ground X P state to the repulsive 1 S stat...
The photochemistry and dynamics of small C6H6–O2 clusters were studied in a supersonic expansion using 226 nm laser excitation and multiphoton ionization probes. We were able to detect a strong signal due to O(P2) when mixed clusters were present in the expansion but no O atom fragments could be observed in the absence of benzene in the expansion mixture. Photofragmentation of O2 in the unique ...
Components of an Ultrasound Quality Assurance Program 257 Quality Assurance and Preventive Maintenance 257 Tissue-Mimicking Phantoms 257 Tissue Properties Represented in Phantoms 257 Typical Quality Assurance Phantom Design 257 Cautions About Phantom Desiccation 258 Basic Quality Control Tests 259 Visual Inspection 259 Transducer Choice 259 System Sensitivity 260 Photography and Gray-Scale Hard...
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