Pitches determination

Force due to roll and pitch determined as the square root of the sum of squares plus force due to heave. 

With the honeycomb system, the catalyst pitch determines the solids handling capabilities. Pitch is the distance from centerline to centerline of one gas path in the honeycomb and typically varies from 2 to 9 mm with higher pitches being used for heavier dust applications. Typical FCC SCR catalyst would have approximately a 5 mm pitch. The following causes can lead to catalyst deactivation ... 

Although the cross section of the self- wiping profile is not affected by the pitch, this is not true for the free volume of a screw channel. The larger the screw pitch, the greater the free volume in the screw channel. The screw pitch determines the fill of the screw channel (Fig. 12.14). 

Since a-Si H has a high resistivity, the Al electrode array pitch determines the resolution for this device. One pixel area is 23.5 X 13.5 pm. The associated Al electrode is 20.5 X11 pm. Therefore the ratio between Al electrode area and one pixel area is as high as 0.73. 

The classic work on pitch detection is that of Hess [202] who gives a thorough overview of all the PDA techniques just mentioned. With PDAs, the basic techniques only go so far and an important component of the algorithm is the use of many heuristic or empirically determined factors. Bagshaw [28] conducted an objective test on 6 popular techniques and claims that the time domain super resolution pitch determination algorithm [309] is the best. Other well known pitch-... 

Hess, W. Pitch Determination of Speech Signals. Springer-Verlag, 1983. 

Medan, Y, Yair, E., and Chazan, D. Super resolution pitch determination of speech signals. Proceedings of the IEEE Transactions in Signal Processing 39 (1991), 40 8. 

Beam collimation and table movement together (i.e. pitch) determine the volume of tissue irradiated per gantry rotation, whereas section collimation determines the minimal slice (also known as section) thickness that can be reconstructed from an examination s raw data. That is, the narrowest selected reconstructed slice thickness available will equal the selected size of the detector elements (Dalrymple et al. 2005). Section collimation may also be referred to as (effective) detector (row) thickness. The term detector configuration merely couples together the value selected for the section collimation with the number of detector elements. For example 4 x 1.25 refers to a four- channel scanner acquiring four channels of data 1.25 mm thick. Similarly, 16 x 0.625 refers to 16 channels of data 0.625 mm thick obtained on a 16-channel scanner. From this information and the equation for pitch, it can be seen that detector configuration is numerically equal to the beam collimation (Rydberg et al. 2003 Saini 2004). 

X-ray and neutron scattering are suited to determine the size and anisometry of micelles. This gives useful information because there is an influence of these properties on the magnitude of the phase chirality of lyotropics. If the pitch of chiral phases is in the range of a few pm or below, it can be measured by means of laser light diffraction. Cano preparations have not been used for pitch determination. 

The conditions of pyrolysis either as low or high temperature carbonization, and the type of coal, determine the composition of Hquids produced, known as tars. Humic coals give greater yields of phenol (qv) [108-95-2] (up to 50%), whereas hydrogen-rich coals give more hydrocarbons (qv). The whole tar and distillation fractions are used as fuels and as sources of phenols, or as an additive ia carbonized briquettes. Pitch can be used as a biader for briquettes, for electrode carbon after coking, or for blending with road asphalt (qv). 

The retention of fillers in the sheet during the forming process is important. Both hydrodynamic mechanisms and colloidal or coflocculation phenomena are significant in determining filler retention (7). Polymeric retention aids are used to bridge between filler particles and fibers. Talc is sometimes used with mechanical pulp furnishes in order to reduce the deposition of pitch-like materials onto paper machinery. 

Time must be allowed for the degasifter to be effective, and the treated melt should be tested with a so-called pitch test to determine the condition of the melt. 

Air-Flow Control Process operating reqmrements and weather conditions are considered in determining the method of controlling air flow. The most common methods include simple on-off control, on-off step control (in the case of multiple-driver units), two-speed-motor control, variable-speed drivers, controllable fan pitch, manually or automatically adjustable louvers, and air recirculation. 

The ratio between the input-to-output shaft speeds is determined either by the ratio of the two pitch diameters or the ratio between the number of teeth ... 

Knowing the helix pitch, it is possible to determine an approximate value for the radius of the helix in the B form from the inclination of the... 

It has been established that, when mesophase pitch is carbonized, the morphology of the pitch is the primary factor [20] in determining the microstructure of the resulting graphitic material. This may be attributed to the stacking behavior of mesophase molecules (quite similar to the planar stacking in turbostratic graphite), which may be visualized as shown in Fig. 5. 

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