Recent content by wh88

For this nonlinear hardening stress strain curve, how do you express strain in terms of stresses ?

I think I have got the answer using Bayes Theorem. P (rain | rain is forecast) was what's required

Unfortunately that's all the info that was supplied in the question. Mean and std dev cannot be found. 90% accuracy means the forecast is correct 90% of the time. I initially thought P(rain) would be 5/365, since the forecast should have no effect on weather. However, it seems...

Please help with this: Suppose in recent years, it has only rained an average of 5 days a year. The weather forecast, which has an accuracy of 90%, predicts rain for tomorrow. What is the probability of rain tomorrow? A: <1% B: between 5 and 15% C: between 15 and 80% D: between 80 and...

i finally got it. Thank you very much uart!

uart, the question asks us to re-arrange the open loop transfer function and sketch the root locus for the system as a varies from 0 to infinty. I doubt numerical methods are required. Its the re-arrangement that's troubling me.

Thanks for your help, uart. My understanding is that before plotting the poles and zeros on the complex plane, we have to get the open loop TF arranged in the form KF(s) if we want to find out how variation of K from 0 to infinity affects the system. So in this case, won't we have to...

sorry i made a mistake in the opening post. it should be 'variation of the parameter a'. i missed out the 'a'. to uart, i believe its -180 degs and magnitude 1

Homework Statement Re-arrange the open-loop transfer function and sketch the root locus for the system for variation of the parameter 'a' from 0 to infinity. Homework Equations G(s)H(s) = 10(s+a) / [s(s+1)(s+8)] The Attempt at a Solution my problem is that i don't know how to re-arrange...