Как выбрать гостиницу для кошек
14 декабря, 2021
Сегодня каждый, кто собирается в отпуск и не знает, с кем оставить своего котика или кошку, может во[...]
Mathematical Background
Even though this book deals with experimental measurements, it is necessary to consider some mathematical questions. First, it is essential to examine briefly the methods used for theoretical analysis of dynamic systems so that the significance of test results will be appreciated. It is also necessary to study Fourier analysis and related topics as a background for later discussions on data analysis. The treatments in this chapter are not complete mathematical developments, but are condensations that should be useful as a review for the reader.