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050 100 150 200 250 300 350 400
2
4
6
8
10
12
14
16
18
20
22 Plot of temperature (C) versus time (days)
t (days)
T (C)
6
7
8
9
10
0 6 12 18 24
0 5 10 15 20 25
6.5
7
7.5
8
8.5
9
9.5
Time vs. pH
Time (hours)
pH
0
100
200
300
400
060 120 180 240 300 360
0100 200 300 400
100
150
200
250
300
350
400
-1 -0.5 0 0.5 1
-1
-0.5
0
0.5
1
24
-0.7
0
0.7
2 4
©
00.1 0.2 0.3 0.4 0.5 0.6 0.7
-2
0
2(a) f(t) versus time (s)
010 20 30 40 50
-1
0
1(b) Real component versus frequency
010 20 30 40 50
-1
0
1x 10-15 (c) Imaginary component versus frequency
frequency (Hz)
010 20 30 40 50
0
0.05
0.1
0.15
0.2
0.25
Power spectrum
Frequency (Hz)
©
0 1 2 3 4 5 6
0
2
4(a) f(t) versus time (s)
00.5 11.5 22.5 3
-0.5
0
0.5 (b) Real component versus frequency
00.5 11.5 22.5 3
-0.5
0
0.5 (c) Imaginary component versus frequency
frequency (Hz)
0 2 4 6 8
0
0.5
1(a) f(t) versus time (s)
0 2 4 6 8
-0.4
-0.2
0(b) Real component versus frequency
0 2 4 6 8
-1
0
1(c) Imaginary component versus frequency
frequency (Hz)
0 0.1 0.2 0.3 0.4 0.5 0.6 0.7
-2
0
2(a) f(t) vs. t
010 20 30 40 50
-1
0
1(b) Real component vs. frequency
010 20 30 40 50
-1
0
1x 10-15 (c) Imaginary component vs. frequency
010 20 30 40 50
0
0.2
0.4 (d) Power vs. frequency
©
0 0.05 0.1 0.15 0.2 0.25 0.3 0.35 0.4 0.45 0.5
-10
0
10 (a) f(t) versus time (s)
010 20 30 40 50 60 70
-1
0
1(b) Real component versus frequency
010 20 30 40 50 60 70
-0.5
0
0.5 (b) Imaginary component versus frequency
frequency (Hz)
©
010 20 30 40 50 60 70
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
Power spectrum
Frequency (Hz)
