β i t

t = 1

00:00~03:00

t = 2

03:00~06.00

t = 3

06:00~09:00

t = 4

09:00~12:00

t = 5

12:00~15.00

t = 6

15:00~18:00

t = 7

18:00~21:00

t = 8

21:00~24:00

i = 1

7000

5800

4100

3800

3400

3500

3850

6200

i = 2

15800

13800

11000

8600

8500

9200

11000

15700

i = 3

16800

14300

6300

4800

4500

5000

9000

16000