Friday, November 15, 2013

principles of communications, 2013/2014, end of week #5 to L16

This week, control theory and optimization...

Some minor inaccuracies in slides have been corrected in the online copies linked from the course materials page...[or will be as soon as I can get powerpoint with the right fonts:) - the key error is in the calculation of the steady state error of the proportional controller - for some reason, there's a subtraction of the two terms for U(s) where it should be +
(KUs + Rc) / (s(s+K)
I think {need to check this:) it kind of makes sense (if the completion rate increases, the admission rate should increase....)

then when we take the limit of s(U(s), as s->0, we'll get Us + Rc/K
so ess (error in steady state) is Us - (Us + Rc/K) which gives us -Rc/K
(i.e. the answer is right, but the system response wasn't...will check and correct soon...

again, to note, the chapter on control theory in Keshav's book is very clear if you want alternative source + some nice example problems.

1 comment:

nice junjun said...

One of its best-selling product gucci replica handbags " No. 5 perfume " , the EU Scientific Committee on Consumer Safety recommended a ban on the sale , because the tree moss fragrance contains ingredients . Tree moss is a natural extract, but with pollen , as it could lead to a 1% -3% of people are allergic , but it itself is harmless. replica gucci handbags Paris Fashion Week debut of new models of volcanic ash T stage catwalk on March 8 , the models show Chanel 2011-2012 autumn and winter clothing at the Paris Exhibition . The same day, Chanel Paris Fashion Week debut in autumn and winter .
The organizers will live and stones covered with volcanic ash , smoke in the audience of the world shrouded atmosphere. 14, accompanied by the roar of the machine , more than 30,000 pieces of counterfeit "LV", Louis vuitton replica handbags and other brands are now being destroyed on the spot in the ancient streets of Yantai Development Zone . These bags bags cases from 2011 Yantai Municipal Public Security Bureau cracked selling , brand trademark infringement , involving the value of 7.4 billion, is the largest country involved in the value of similar cases . Active in Japan and South Korea , specializing in manufacturing and selling fake brand-name bags gang was destroyed. China duty-free imports from a limited liability company in Belgium luxury brand " Chanel " nail polish , because the detection of benzene have been notified . It is understood that the volatile benzene , long-term contact with the skin or by inhalation into the body , would infringe the human nervous system. A current batch of wash water have been destroyed.