Therefore, we invite three experts (marked by 1, 2, and 3) to make assessment on safety of five enterprises

and then reorganize enterprises who have poor safety according to evaluation result [16, 17]. Through amounts of deep survey and analysis, we identified seven safety assessment indexes of dangerous goods transport enterprise as listed below: safety peptide production awareness and safe performance skills (b1) of workers, management system of enterprise (b2), safety and operation of facilities (b3), pretransport security check (b4), management and control during transport (b5), prevention measures against damage during transportation of dangerous goods (b6), and mechanism of emergency rescue in safety accident (b7). Step 1. Collect data for above indexes from five enterprises which is going to be assessed. Then make linear transformation on original data, using min-max standardized method, and ensure they are within interval [0,10]. Other indexes, which involve economy, society, and politics and are hard to quantify, come from related professional experts. Those experts rate on satisfaction of indexes according to comprehensive experience and research and the final satisfaction rate within [0,10]. Step 2. Identify dynamic indexes and transform to static ones. Because (b1) varies with education

degree and work experience, (b6) changes from different goods types and transport route, and (b7) also varies by severity degree of accident, while the left four indexes (b2, b3, b4, b5) are of long-time stability. Now we can easily draw that b1, b6, b7 are dynamic

indexes and b2, b3, b4, b5 are static indexes. Take expert 1, for example, to make a brief description of handling dynamic index statically. Firstly, experts will inspect and analyse dynamic indexes in dangerous goods transport enterprises and rate the satisfaction. Then we get the table of dynamic indexes evaluation of the dangerous goods transport enterprises when K = 1 (see Table 1). Table 1 Dynamic index evaluation of the dangerous goods transport enterprises when K = 1. Because the attributes of dynamic index are time-varying, Entinostat the values marked by experts also change at the same time. So we can get Table 2 when K = 2. Table 2 Dynamic index evaluation of the dangerous goods transport enterprises when K = 2. To simplify example, we consider that the attributes weight of indexes is already known as u 1 = 0.2,0.1,0.2,0.1,0.1,0.1,0.2 in this paper. Then we can get Table 3 according to formula (3). Table 3 Dynamic index evaluation after static treatment. Step 3. According to the results we got from Steps 1 and 2, and combining with rating of static indexes marked by expert 1, we can get security evaluation value of each index of dangerous goods transport enterprises in Table 4.