Disturbance attenuation factor

If local containment is applied to the worst-case disturbance, the new worst-case disturbance can be assumed to be bounded by startup to maximum flow, giving Lcnet —. 01 M This disturbance may be in either the acid or the alkali direction, so 6c e, is reduced to. 00025 N. This corresponds to a required disturbance attenuation of. 025. The residence time has been doubled and the achievable attenuation decreases by a factor of 2" compared to the table above. The rigorous bound suggests that one tank might be just adequate (.017 versus. 025), while the heuristic estimate indicates that two tanks would be required. The two-tank system has an estimated attenuation of. 004 compared to a requirement of. 025 and should be able to deliver the required performance despite the titration curve variability. 

The frequency correlation lowers environmental disturbances. The correlation provides an output proportional to the content of Aa at the reference signal fundamental frequency, the phase conelation gives the sign of Aa. Where the stress gradients are very steep in materials of high thermal conductivity being loaded at low frequencies, the SPATE signals are attenuated and a correction factor has to be introduced to take into account this effect. 

ABSTRACT In this study the disturbance factor in the general Hoek-Brown (HB) criterion is considered to be a gradually-attenuated variable from the excavation surface to the deep surrounding rocks. The elasto-plastic analytical solution is formulated for an axisymmetrical cavern model in which there exist a supported pressure at the wall of tunnel and a far-field pressure at infinity. The presented analytical model can well reflect the disturbance of the HB rock mass triggered by drilling and blasting excavation. 

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