Study on the Characteristics of the Rolling Motion of Small Boats in Irregular Seas by Forecasting

Abstract

Compared with other kind of ships ， small fishing boats tend to roll by relatively small wave ． Especially ， rolling motion with sudden change is very dangerous for crew working on the deck ． Therefore estimation for rolling motion is very i皿 portant ． However ， it is dangerous to predict rolling motlon recklessly without consideration for limitation of prediction models ． In many cases ， the prediction model for ship motiens in irregular seas is based upon probabilis −

Video analysis of fish schooling behavior in finite space using a mathematical model

“…The validity of this mathematical model was verified by analyzing time-series data using two methods: power spectrum analysis and fractal dimension analysis (Ueno et al, 2000). Defined as a random force, F ri is the residual force that cannot be attributed to any other forces; its power spectrum should lack periodicity.…”