概念

外延

内涵

辨识属性集

1

$x_1$

$\left\{\langle 0.0,1.0\rangle ,\langle 0.9,0.0\rangle ,\langle 0.5,0.4\rangle ,\langle 0.7,0.2\rangle ,\langle 0.9,0.1\rangle \right\}$

$a_2$

2

$x_2$

$\left\{\langle 1.0,0.0\rangle ,\langle 0.7,0.2\rangle ,\langle 0.6,0.3\rangle ,\langle 0.9,0.1\rangle ,\langle 0.7,0.2\rangle \right\}$

$\begin{array}{l}\left(a_1\vee a_3\vee a_4\right)\wedge \\ \left(a_2\vee a_3\vee a_4\vee a_5\right)\end{array}$

3

$x_1,x_2$

$\left\{\langle 0.0,1.0\rangle ,\langle 0.7,0.2\rangle ,\langle 0.5,0.4\rangle ,\langle 0.7,0.2\rangle ,\langle 0.7,0.2\rangle \right\}$

$a_2\vee a_4\vee a_5$

4

$x_2,x_3$

$\left\{\langle 1.0,0.0\rangle ,\langle 0.2,0.8\rangle ,\langle 0.5,0.4\rangle ,\langle 0.5,0.4\rangle ,\langle 0.7,0.2\rangle \right\}$

$a_1$

5

$x_2,x_5$

$\left\{\langle 0.5,0.5\rangle ,\langle 0.5,0.5\rangle ,\langle 0.3,0.6\rangle ,\langle 0.5,0.4\rangle ,\langle 0.7,0.2\rangle \right\}$

6

$x_1,x_2,x_3$

$\left\{\langle 0.0,1.0\rangle ,\langle 0.5,0.5\rangle ,\langle 0.5,0.4\rangle ,\langle 0.5,0.4\rangle ,\langle 0.7,0.2\rangle \right\}$

$a_3$

7

$x_1,x_2,x_5$

$\left\{\langle 0.0,1.0\rangle ,\langle 0.5,0.5\rangle ,\langle 0.3,0.6\rangle ,\langle 0.5,0.4\rangle ,\langle 0.7,0.2\rangle \right\}$

$a_2\vee a_5$

8

$x_2,x_3,x_5$

$\left\{\langle 0.5,0.5\rangle ,\langle 0.2,0.8\rangle ,\langle 0.3,0.6\rangle ,\langle 0.5,0.4\rangle ,\langle 0.7,0.2\rangle \right\}$

$a_1$

9

U

$\left\{\langle 0.0,1.0\rangle ,\langle 0.2,0.8\rangle ,\langle 0.3,0.6\rangle ,\langle 0.5,0.4\rangle ,\langle 0.7,0.2\rangle \right\}$

无

10

$\varnothing$

$\left\{\langle 1.0,0.0\rangle ,\langle 1.0,0.0\rangle ,\langle 1.0,0.0\rangle ,\langle 1.0,0.0\rangle ,\langle 1.0,0.0\rangle \right\}$

$a_2\vee a_3\vee a_4$

总结

$\left\{a_1,a_2,a_3\right\}$