In the distillation units for producing petroleum cuts, the curves are determined in the laboratory from samples taken at regular intervals. [Pg.163]

If maintenance is performed, there are two principal maintenance strategies preventive and breakdown maintenance. These are not mutually exclusive, and may be combined even in the same piece of equipment. Take for example a private motor car. The owner performs a mixture of preventive maintenance (by adding lubricating oil, topping up the battery fluid, hydraulic fluid and coolant) with breakdown maintenance (e.g. only replacing the starter motor when it fails, rather than at regular intervals). [Pg.288]

No firm conclusion should be drawn from the above data, through the observed pattern deserves attention. The AE activity observed on the SH header can originate from the weld, but could be due to other causes, namely to the settlement of the hanger. Ultrasonic inspection of the weld at regular intervals checks whether any sizeable change in NDT response from the weld has taken place. [Pg.78]

The accredited laboratory must confirm that all the equipment used in NDT implementation is tested with regular intervals in compliance with relevant state standards. [Pg.958]

The surface tensions for solutions of organic compounds belonging to a homologous series, for example, R(CH2)nX, show certain regularities. Roughly, Traube [145] found that for each additional CH2 group, the concentration required to give a certain surface tension was reduced by a factor of 3. This rule is manifest in Fig. lll-15b the successive curves are displaced by nearly equal intervals of 0.5 on the log C scale. [Pg.90]

However, the B.E.T. and modificated B.E.T as well as isotherm of d Arcy and Watt fit the experimental data only in some range of the relative humidities up to about 80-85%. At the same time the adsorption in the interval 90-100% is of great interest for in this interval the A— B conformational transition, which is of biological importance, takes place [17], [18]. This disagreement can be the result of the fact that the adsorbed water molecules can form a regular lattice, structure of which depends on the conformation of the NA. To take into account this fact we assume that the water binding constants depend on the conformational variables of the model, i.e ... [Pg.121]

Snapshots at regular time intervals that store atomic coordi-riaies and velocities. You can play back these snapshots to inspect the simulated structures or to average values. Yon specify a Snapshot period in the Molecular Dynamics Snapshots dialog box. [Pg.80]

In practical applications, x(t) is not a continuous function, and the data to be transformed are usually discrete values obtained by sampling at intervals. Under such circumstances, I hi discrete Fourier transform (DFT) is used to obtain the frequency function. Let us. suppose that the time-dependent data values are obtained by sampling at regular intervals separated by

The value of the additional degree of freedom s can change and so the time step in real tin can fluctuate. Thus regular time intervals in the extended system correspond to a trajecto of the real system which is unevenly space in time. [Pg.401]

Averages or plotted values at regular time intervals. You specify an Average/Graph period in the Molecular Dynamics Averages dialog box. [Pg.80]

HyperChem updates the screen during a trajectory at regular intervals so you can visualize the trajectory. Since this screen update may slow down a trajectory if it occurs too frequently, you can specify the duration of the Screen Refresh period At5. The screen updates at times tg, tg + At5, tg + 2At5, etc. The Screen Refresh period is specified in the Molecular Dynamics options dialog box by U5 data steps, i.e. as a multiple of the data collection period,... [Pg.319]

These resulting polymers are solid, linear, internally cyclized, thermoplastic structures containing unreacted allylic groups spaced at regular intervals along the polymer chain. [Pg.1014]

Another simple way of comparing the shape of the isotherm on a given solid with that on a reference sample is to read olT the ordinates of the two isotherms at regular intervals of relative pressure, calculate the value / of their ratio, and plot / against p/p°. Changes in the shape of the isotherm on the given solid from that on the reference sample will show up as deviations of the /-plot from the horizontal. [Pg.100]

Volumes in mm (liquid) radii and film thicknesses in A area in m g . The remainder of the standard columns ([1] to [9]) may be built up from Tabic 3.2A an alternative table, based on regular intervals of r, may be built up from Table 3.2B. [Pg.137]

To facilitate application of the method, Dollimore and Heal gave a standard table of the relevant parameters, based on regular intervals of P extending from 100 A down to 7 A (-values were calculated with Halsey s equation (p. 89). Table 3.2B retains the essential features of their original table, but P no longer extends below 17 A (cf. p. 160) and the /-values are now based on an experimentally determined standard isotherm.(p. 93). [Pg.140]

Samples collected from the target population at regular intervals in time or space. [Pg.184]

Flow injection analysis (FIA) was developed in the mid-1970s as a highly efficient technique for the automated analyses of samples. °> Unlike the centrifugal analyzer described earlier in this chapter, in which samples are simultaneously analyzed in batches of limited size, FIA allows for the rapid, sequential analysis of an unlimited number of samples. FIA is one member of a class of techniques called continuous-flow analyzers, in which samples are introduced sequentially at regular intervals into a liquid carrier stream that transports the samples to the detector. ... [Pg.649]

Lastly, we consider a class of compounds called ladder polymers, which are made up of a double-stranded backbone that is linked at regular intervals into rings so that the schematic structure is... [Pg.337]

Evaluate ASj for ideal solutions and for athermal solutions of polymers having n values of 50, 100, and 500 by solving Eqs. (8.28) and (8.38) at regular intervals of mole fraction. Compare these calculated quantities by preparing a suitable plot of the results. [Pg.518]

A metier is an array of individual extmsion positions on one machine. The yam is collected as a package, eg, bobbin, tube, pirn, at each metier position and removed from the machine at regular intervals to maintain a constant supply of yam on each package. The package may contain 0.5—7.0 kg of yam. Bobbin yam may contain a slight twist, ie, ca 0.08 turns per cm, whereas yam taken up on tubes may have zero twist. The yam is transferred from bobbins to different packages for sale. The product may contain a twist of 0.3—8.0 turns per cm. At present, compacted yam is more popular than low twist yam. [Pg.297]

© 2019 chempedia.info