Figure 7
The figure contains eight line graphs arranged in four rows and two columns. The left column represents “Week 1” and the right column represents “Week 2”. Each row corresponds to a different measurement labeled “E 1”, “E 2”, “E 3”, and “E 4”. Each plot displays two lines: a blue solid line representing “Displacement” and a red solid line representing “Temperature”. A legend appears inside each plot at the top right corner indicating these two variables. In all plots, the horizontal axis is shows the same evenly spaced values within each column. For Week 1, the axis includes “02-17”and “02-21”. For Week 2, the axis includes “06-27”, “06-29”, and “07-01”. In right column, first graph labeled “E 1 and Temperature (Week 1)” shows a dual-axis where the left vertical axis is labeled “Displacement (millimeters)” and ranges from “negative 0.014” to “negative 0.008” in increments of 0.002 units and right vertical axis is labeled “Temperature (degree Celsius)” and ranges from “15” to “20”. The blue displacement line passes near (02-17, negative 0.011) and (02-21, negative 0.012). Between these points, the line fluctuates with multiple peaks and dips within the given range. The red temperature line passes near (02-17, 18) and (02-21, 16). Between these points, the line fluctuates in a smooth cyclical pattern. A dashed vertical marker labeled “Lag:150” appears near the left side of the graph. The second graph labeled “E 2 and Temperature (Week 1)” shows a dual-axis plot where the left vertical axis is labeled “Displacement (millimeters)” and ranges from “negative 0.010” to “0.000” in increments of 0.005 units and the right vertical axis is labeled “Temperature (degree Celsius)” and ranges from “15” to “20”. The blue displacement line passes near (02-17, negative 0.005) and (02-21, negative 0.010). Between these points, the line fluctuates with multiple peaks and dips within the given range. The red temperature line passes near (02-17, 18) and (02-21, 16). Between these points, the line fluctuates in a smooth cyclical pattern. A dashed vertical marker labeled “Lag:250” appears near the left side of the graph. The third graph labeled “E 3 and Temperature (Week 1)” shows a dual-axis plot where the left vertical axis is labeled “Displacement (millimeters)” and ranges from “0.010” to “0.020” in increments of 0.010 units and the right vertical axis is labeled “Temperature (degree Celsius)” and ranges from “15” to “20”. The blue displacement line passes near (02-17, 0.015) and (02-21, 0.012). Between these points, the line fluctuates with multiple peaks and dips within the given range. The red temperature line passes near (02-17, 18) and (02-21, 16). Between these points, the line fluctuates in a smooth cyclical pattern. A dashed vertical marker labeled “Lag:250” appears near the left side of the graph. The fourth graph labeled “E 4 and Temperature (Week 1)” shows a dual-axis plot where the left vertical axis is labeled “Displacement (millimeters)” and ranges from “0.020” to “0.040” in increments of 0.010 units and the right vertical axis is labeled “Temperature (degree Celsius)” and ranges from “15” to “20”. The blue displacement line passes near (02-17, 0.035) and (02-21, 0.030). Between these points, the line fluctuates with multiple peaks and dips within the given range. The red temperature line passes near (02-17, 18) and (02-21, 16). Between these points, the line fluctuates in a smooth cyclical pattern. A dashed vertical marker labeled “Lag:1000” appears near the left side of the graph. In the left column, the first graph labeled “E 1 and Temperature (Week 2)” shows a dual-axis plot where the left vertical axis is labeled “Displacement (millimeters)” and ranges from “negative 0.018” to “negative 0.016” in increments of 0.002 units and the right vertical axis is labeled “Temperature (degree Celsius)” and ranges from “20” to “24” in increments of 2. The blue displacement line passes near (06-27, negative 0.017) and (07-01, negative 0.018). Between these points, the line fluctuates with multiple peaks and dips within the given range. The red temperature line passes near (06-27, 23) and (07-01, 22). Between these points, the line fluctuates in a smooth cyclical pattern. A dashed vertical marker labeled “Lag:150” appears near the left side of the graph. The second graph labeled “E 2 and Temperature (Week 2)” shows a dual-axis plot where the left vertical axis is labeled “Displacement (millimeters)” and ranges from “negative 0.015” to “negative 0.005” in increments of 0.005 units and the right vertical axis is labeled “Temperature (degree Celsius)” and ranges from “20” to “24” in increments of 2. The blue displacement line passes near (06-27, negative 0.005) and (07-01, negative 0.015). Between these points, the line fluctuates with multiple peaks and dips within the given range. The red temperature line passes near (06-27, 23) and (07-01, 22). Between these points, the line fluctuates in a smooth cyclical pattern. A dashed vertical marker labeled “Lag:150” appears near the left side of the graph. The third graph labeled “E 3 and Temperature (Week 2)” shows a dual-axis plot where the left vertical axis is labeled “Displacement (millimeters)” and ranges from “negative 0.010” to “0.000” in increments of 0.005 units and the right vertical axis is labeled “Temperature (degree Celsius)” and ranges from “20” to “24” in increments of 2. The blue displacement line passes near (06-27, 0.000) and (07-01, negative 0.010). Between these points, the line fluctuates with multiple peaks and dips within the given range. The red temperature line passes near (06-27, 23) and (07-01, 22). Between these points, the line fluctuates in a smooth cyclical pattern. A dashed vertical marker labeled “Lag:150” appears near the left side of the graph. The fourth graph labeled “E 4 and Temperature (Week 2)” shows a dual-axis plot where the left vertical axis is labeled “Displacement (millimeters)” and ranges from “0.030” to “0.045” in increments of 0.005 units and the right vertical axis is labeled “Temperature (degree Celsius)” and ranges from “20” to “24” in increments of 2. The blue displacement line passes near (06-27, 0.045) and (07-01, 0.032). Between these points, the line fluctuates with multiple peaks and dips within the given range. The red temperature line passes near (06-27, 23) and (07-01, 22). Between these points, the line fluctuates in a smooth cyclical pattern. A dashed vertical marker labeled “Lag:800” appears near the left side of the graph. Note: All numerical data values are approximated.Comparison of optimal temperature–displacement lag compensation for the FBG_2 monitoring system. Time-series plots for two monitoring intervals: Week 1 (FEB) and Week 2 (JUL)