Big Chemical Encyclopedia

Chemical substances, components, reactions, process design ...

Articles Figures Tables About

Time delayed values

The simplest settler model is that in which it is assumed that each phase flows through the settler in uniform plug flow, with no mixing and constant velocity, with the effect that the concentrations leaving the settler, X and Y , are simply the time delayed values of the exit mixer concentrations, Xmn and Ymn- In this the magnitude of the time delay is thus simply the time required for the phase to pass through the appropriate settler volume. [Pg.186]

It is more reliable to calculate the time-delays between the IP-packets during open session between AC and VC. In this case after session closing we will get two arrays of time-delays values time-delays between AC and VC (Mi) in forward direction and time-delays between VC and AC (M2) in back direction. Thus VC can receive the information about AC address or the address of the last intermediate computer. If the attack is carried out with direct connection to VC (Figure 1) then the values of time delays between the packets which goes from AC to VC will be approximately equal to the values of time delays between the packets that goes from VC to AC. [Pg.196]

To determine time dependent behaviours of the specimen up to 25 measurements in series with different time delays are possible. To prevent mistakes in application many help comments appear when inputs are necessary or differences between the calibration and the measurement are detected. All calibration conditions, a description for the specimen and results can be printed or saved by the hard disk. To reduce the input expenditure, the last configuration is made to current values when the program is stopped ore leave. [Pg.869]

The Smith predictor is a model-based control strategy that involves a more complicated block diagram than that for a conventional feedback controller, although a PID controller is still central to the control strategy (see Fig. 8-37). The key concept is based on better coordination of the timing of manipulated variable action. The loop configuration takes into account the facd that the current controlled variable measurement is not a result of the current manipulated variable action, but the value taken 0 time units earlier. Time-delay compensation can yield excellent performance however, if the process model parameters change (especially the time delay), the Smith predictor performance will deteriorate and is not recommended unless other precautions are taken. [Pg.733]

It is necessary to add a small leading edge spike filter to the current sensing output. To keep the time delay to a reasonable value, I will use a 1K ohm resistor and a 470 pF capacitor. [Pg.127]

TIME DELAY ELEMENTS (INTEGER VALUE) N=IFIX (DELAY/CINT)... [Pg.454]

The dead time function is also called the time delay, transport lag, translated, or time shift function (Fig. 2.3). It is defined such that an original function f(t) is "shifted" in time to, and no matter what f(t) is, its value is set to zero for t < to- This time delay function can be written as ... [Pg.15]

The idea of a root locus plot is simple—if we have a computer. We pick one design parameter, say, the proportional gain Kc, and write a small program to calculate the roots of the characteristic polynomial for each chosen value of as in 0, 1, 2, 3,., 100,..., etc. The results (the values of the roots) can be tabulated or better yet, plotted on the complex plane. Even though the idea of plotting a root locus sounds so simple, it is one of the most powerful techniques in controller design and analysis when there is no time delay. [Pg.133]

Many compounds are capable of absorbing uv radiation and subsequently emitting radiation of a longer wavelength, either instantly (fluorescence) or after a time delay (phosphorescence). Usually, the fraction of the absorbed energy that is re-emitted is quite low, but for a few compounds values of 0.1-1 are obtained, and such compounds... [Pg.62]

When experimental E(tr) data are known, the time delay r is the value of tr when E(tr) - 0. The moments also are obtained from the data. Then values of the other parameters, n and 0, can be deduced from the given equations. Some numerical examples are tabulated. [Pg.564]

To show how the objective function is computed, consider the sequence x = (3, 1, 2). The job completion times, tardiness values, and delay costs for this sequence are shown in Table 10.2A. [Pg.391]


See other pages where Time delayed values is mentioned: [Pg.116]    [Pg.234]    [Pg.116]    [Pg.234]    [Pg.822]    [Pg.270]    [Pg.507]    [Pg.834]    [Pg.836]    [Pg.63]    [Pg.91]    [Pg.83]    [Pg.138]    [Pg.87]    [Pg.139]    [Pg.400]    [Pg.289]    [Pg.45]    [Pg.581]    [Pg.362]    [Pg.149]    [Pg.152]    [Pg.560]    [Pg.172]    [Pg.54]    [Pg.54]    [Pg.142]    [Pg.144]    [Pg.201]    [Pg.258]    [Pg.108]    [Pg.427]    [Pg.51]    [Pg.172]    [Pg.126]    [Pg.178]    [Pg.127]    [Pg.288]   
See also in sourсe #XX -- [ Pg.144 ]




SEARCH



Time value

© 2024 chempedia.info