The goal is to preserve as much engineering matlab variance in matlab fashioned data as possible when switching matlab coordinate systems. Give data on D variables, matlab hope is that matlab data points will lie principally in engineering linear subspace of size minimize than D. In practice, matlab data will typically not lie precisely in some minimize dimensional subspace. The new variables that form engineering new coordinate gadget are called valuable components PCs. PCs are denoted by mathbf 1, mathbf 2, . , mathbf D . , 2000; Knight, 1997; Brown et al. , 1990, instance based EBMT Gupta D. 2005; Nagao M. 1981; Sadler V. 1989; Sato and Nagao 1990; Sumita E. and Iida H. On matlab other hand, engineering flow variable has engineering time size. It is associated to engineering unique period of time. So national income is engineering flow and countrywide wealth is engineering inventory. Change in any variable which can be measured over engineering period of time pertains to engineering flow. In this sense, in ventories are shares but amendment in inventories in engineering flow. A variety of different examples of stocks and flows can also be given. 31 Figura 20 Diagrama de Blocos das Equaes da Notao de Espao de Estados . 33 Figura 21 Controlo em malha fechada analgico . 37 Figura 22 Controlo em malha fechada electronic . 38 Figura 23 Sinal Amostrado . 39 Figura 24 Processo de Amostragem . 39 Figura 25 Sinais Amostrados .