Fanning

For example, the many deepwater fields located in the Gulf of Mexico are of Tertiary age and are comprised of complex sand bodies which were deposited in a deepwater turbidite sequence. The BP Prudhoe Bay sandstone reservoir in Alaska is of Triassic/ Cretaceous age and was deposited by a large shallow water fluvial-alluvial fan delta system. The Saudi Arabian Ghawar limestone reservoir is of Jurassic age and was deposited in a warm, shallow marine sea. Although these reservoirs were deposited in very different depositional environments they all contain producible accumulations of hydrocarbons, though the fraction of recoverable oil varies. In fact, these three fields are some of the largest in the world, containing over 12 billion barrels of oil each ... 

In traditional Fan-Beam CT the radiation emitted from the X-ray tube is collimated to a planar fan, and so most of the intensity is wasted in the collimator blades (Fig. 2a). Cone-Beam CT, where the X-rays not only diverge in the horizontal, but also in the vertical direction, allows to use nearly the whole emitted beam-profile and so makes best use of the available LINAC photon flux (Fig. 2b). So fast scanning of the samples three-dimensional structure is possible. For Cone-Beam 3D-reconstruction special algorithms, taking in consideration the vertical beam divergence of the rays, were developed. 

Typical tomographic 2D-reconstruction, like the filtered backprojection teelinique in Fan-Beam geometry, are based on the Radon transform and the Fourier slice theorem [6]. 

The GAMMASCAN 1500 HR is a combined system for two-dimensional (2D-CT) and three-dimensional (3D-CT) computed tomography, as well as digital radiography (DR). The system is equipped with two separate detector systems for the fan-beam and cone-beam CT. The sire of the objects is limited to a height of four meters, maximum diameters of 1.5 meters and a weight of up to 15 tons. The turntable which carries the test samples can be moved along and across the beam direction ( X- and Y- direction). The radiation source and the detector systems can be moved in Z- direction, both, simultaneously and independently. 

A second turntable with a higher maximum speed can carry objects with a size up to 300 mm in diameter and a weight up to 250 kg. This turntable can be fixed both, at the front-side and at the back-side of the main turntable. In this manner the operator can make use of the full length of the radiation fan also in the case of small objects. 

Objects which are not covered completely by the fan-beam, which is defined by the linear detector array and the source can be inspected in a special mode. In this case the usable width of the fan is doubled, by placing the turning centre of the object onto the two edges oft the fan. 

Moffat T P, Fan FRF and Bard A 1991 Electrochemical and scanning tunneling microscopic study of dealloying of CUjAu J. Electrochem. Soc. 138 3224... 

Bard A J and Fan F F 1993 Applications in electrochemistry Scanning Tunneiiing Microscopy and Spectroscopy ed D A Bonnell (Weinheim VCFI) oh 9... 

Bard A J, Fan F F, Pierce D T, Unwin P R, Wipf D O and Zhou F 1991 Chemicai imaging of surfaces with the scanning eiectrochemicai microscope Science 254 68... 

Bard A J, Fan F-R F, Kwak J and Lev O 1989 Soanning eleotroohemioal miorosoopy—introduotion and prinoiples Anal. Chem. 61 132... 

Liu FI Y, Fan F-R F, Lin C Wand Bard A J 1986 Soanning eleotroohemioal and tunnelling ultramioroeleotrode miorosoope for high-resolution examination of eleotrode surfaoes in solution J. Am. Chem. See. 108 3838... 

Bard A J, Fan F-R F and Mirkin M V 1994 Soanning eleotroohemioal miorosoopy Electroanalytical Chemistry yo 18, ed A J Bard (New York Dekker)... 

Wang L S, Cheng H S and Fan J 1995 Photoeieotron spectroscopy of size-selected transition metal clusters Kc , n = 3-24 J. Chem. Phys. 102 9480... 

Next day, hang the paper from the edge of the fume-cupboard window in the full draught of the fan to dry, and immediately mark the position of the solvent front. 

Burning clothing. Prevent the person from running and fanning the flames. Make the victim he down on the floor, or throw him (her) down if necessary, and wrap the fireproof blanket firmly around the ignited clothes until the fire is extinguished. 

Amides are the least reactive caiboxyhc acid deiivative and the only nucleophilic acyl substitution reaction they undeigo is hydrolysis Amides are fanly stable m water but the amide bond is cleaved on heating m the presence of strong acids 01 bases Nomi nally this cleavage produces an amine and a caiboxyhc acid... 

Fan spray atomizers Fansteel process Faradaic current... 

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