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PN (proportional navigation) law is in wide use. In this paper, the traditional proportional navigation control system is analyzed, then we find that the traditional proportional navigation guidance law is sensitive to the time-to-go (i.e., time to interception) measurement, in other words, the time-to-go estimation error may cause significant degradation in the performance of the PN guidance law...
The effects of protein adsorption by adsorbents at the membrane permeate side on protein transmission through an ultrafiltration membrane are examined using a pseudo-steady state convection-diffusion model. The permeate side protein concentration gradient formed by the ultrafiltration-cum-adsorption process can enhance the total protein transmission rate considerably at low values of permeate flux...
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