	$t_{1}$		$t_{n}$
	$\begin{matrix} x_{1} & x_{2} & ... & x_{m} \end{matrix}$	…	$\begin{matrix} x_{1} & x_{2} & ... & x_{m} \end{matrix}$
$\begin{matrix} s_{1} \\ s_{2} \\ ⋮ \\ s_{n} \end{matrix}$	$\begin{matrix} x_{11} (t_{1}) x_{12} (t_{1}) \dots x_{1 m} (t_{1}) \\ x_{21} (t_{1}) x_{22} (t_{1}) \dots x_{3 m} (t_{1}) \\ \dots \\ x_{n 1} (t_{1}) x_{n 2} (t_{1}) \dots x_{n m} (t_{1}) \end{matrix}$	…	$\begin{matrix} x_{11} (t_{n}) x_{12} (t_{n}) \dots x_{1 m} (t_{n}) \\ x_{21} (t_{n}) x_{22} (t_{n}) \dots x_{3 m} (t_{n}) \\ \dots \\ x_{n 1} (t_{n}) x_{n 2} (t_{n}) \dots x_{n m} (t_{n}) \end{matrix}$