because of fresh 
websites led by 
the area, which 
quick response 
their technical 
VALUATION 
among so many 
t basic selection 
1e characters of 
ata; 
ion; 
he following 10 
s the evaluation 
in this paper. 
ss 
le.com/ 
com/ 
'ar.com/ 
ibc.com/ 
acm. | 
.com/ 
itu.com/ 
om/ 
.com/ 
m/ditu/ 
  
  
  
  
  
  
  
jsites 
index system 
atically so as to 
ding factors with 
ry factors should 
be ignored properly. A tri-grade evaluation index 
system was established to assign value and compute. 
The first-grade indexes contained four aspects as 
followed: map data, interface interaction, response 
and influence, also every index could be refined in 
Table 2. 
  
1* -grade index & 
weight weight 
2nd -grade index & excellent | good | middle | Qualified Unqualified 
  
Accuracy (0.25) 
  
Authority (0.20) 
  
Map data (0.30) | variety (0.15) 
  
integrity (0.10) 
  
date (0.30) 
  
color (0.15) 
  
interface design 
(0.15) 
  
Function and function rich (0.20) 
  
  
  
  
interaction Function accessibility 
(0.20) (0.20) 
Friendly 
interaction(0.30) 
load (0.20) 
Response (0.30) tile load (0.40) 
  
search (0.40) 
  
page view (0.30) 
  
Influence (0.20) average time on site 
(0.20) 
  
Cite (0.30) 
  
API (0.20) 
  
  
  
  
  
  
  
  
  
Table 2. Comprehensive evaluation index system 
32 The mathematical model of fuzzy 
comprehensive evaluation 
Fuzzy Comprehensive evaluation method is a good 
Way to solve the problem of which evaluating indexes 
are difficult to quantify and evaluating factors bear the 
fuzzy quality. For some simple issues, a reasonable 
result can be got with the first-grade comprehensive 
evaluation. But many more factors must be considered 
in some complicated issues, the weight of every factor 
may be very tiny, and for this reason some 
information will lost which leads to the invalidation of 
the model. The multiple-grades comprehensive 
421 
evaluation model and the improved generalized fuzzy 
operator were used in this paper. 
3.2.1 Evaluation indexes: An evaluation factors set 
could be got from the evaluation index system as 
shown in equation 1 
U = (U,,U,,U,,U,} (D 
where U represented all the sets of the 2nd evaluation 
factors. 
The subset of U, (i = 1,2,3,4) is 
U,= Un Un Un Ua Uis} @) 
where U, represented the 2nd set of evaluation 
factors.