P 1=(0.20，0. 15，0. 10，0.30，0.25)
P2=(0.25，0.20，0. 15，0. 10，0.30)
P3=(0.30，0.25，0.20，0. 15，0. 10)
P4=(0. 15，0. 10，0.30，0.25，0.20)
P5=(0. 10，0.30，0.25，0.20，0. 15)
Taking the unit with i=20 and j=28 in the universe U={uij), it is known that the salinity of this unit is good, so it is better to set its evaluation set as possible.
B=(0.65，0.25，0. 10)
According to Table 7- 1, 2, 3, the unit factor evaluation matrix R with i=20 and j=28 can be obtained.
Tectonic system and gold mineralization dynamics in northwest Jiaodong
Calculate Bi = PIR (I = 1, 2, 3, 4, 5) and get:
B 1=(0.53，0.30，0. 17)
B2=(0.54，0.30，0. 16)
B3=(0.575，0.275，0. 15)
B4=(0.52，0.325，0. 155)
B5=(0.535，0.30，0. 165)
In order to measure the proximity between evaluation sets B and Bi by proximity, the proximity formula is used.
Tectonic system and gold mineralization dynamics in northwest Jiaodong
The proximity of b and Bi is obtained as follows
(B 1，B)= 1/2[0.530+( 1-0. 170)]= 0.680
(B2，B)= 1/2[0.540+( 1-0. 160)]= 0.690
(B3 B)= 1/2[0.575+( 1-0. 150)]= 0.7 13
(B4，B)= 1/2[0.520+( 1-0. 155)]= 0.683
(B5，B)= 1/2[0.535+( 1-0. 165)]= 0.685
Therefore, the most reasonable weight setting is as follows.
P3=(0.30，0.25，0.20，0. 15，0. 10)
It can be seen from the weight distribution map that the most important controlling factor for mineralization is F, followed by Q, T, E and L in turn. This is consistent with the understanding obtained from the actual geological survey, which shows that the analysis conclusion of fuzzy mathematical model is reliable.