A recent Design Idea presents a circuit to measure an airflow rate up to 2000 fpm using two transistors in a Darlington configuration. One transistor works as a self-heated thermal sensor and the ...

Physics and Python stuff. Most of the videos here are either adapted from class lectures or solving physics problems. I really like to use numerical calculations without all the fancy programming ...

This paper proposes some tests for parameter constancy in linear regressions. The tests use weighted empirical distribution functions of estimated residuals and are asymptotically distribution free.

Linear relationships are common in statistics, economics, and everyday life. They are often contrasted with nonlinear relationships, where variables relate in more complex or curved ways.

To minimize the error, we need to minimize the Linear Regression Cost Function. Lesser the cost function, better the learning, more accurate will be the predictions.

That is the the basic form of linear regression by hand. Note that there ARE other ways to do this - more complicated ways (assuming different types of distributions for the data).

Lon-Mu Liu, USE OF LINEAR TRANSFER FUNCTION ANALYSIS IN ECONOMETRIC TIME SERIES MODELLING, Statistica Sinica, Vol. 1, No. 2 (July 1991), pp. 503-525 ...