switched to MDPI journal layout
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@@ -18,8 +18,12 @@
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Within all \docWIFI{} observations, we only consider the \docAP{}s that are permanently installed
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and can be identified by their well-known MAC address.
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Temporal and movable transmitters like smart TVs or smartphone hotspots are ignored as they might cause estimation errors.
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The \docWIFI{} quality factor from section \ref{sec:wifiQuality} was configured with
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a lower bound of \SI{-85}{\decibel m}, an upper bound of \SI{-70}{\decibel m} and a threshold of $0.25$.
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%
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Unfortunately, due to non-disclosure agreements, we are not allowed to depict the actual location
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Unfortunately, due to legal reasons, our institution does not allow depicting the actual location
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of installed transmitters within the following figures.
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@@ -157,26 +161,27 @@
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distance between estimated and real position is $\sim$\SI{8}{\meter} and the maximum $\sim$\SI{27}{\meter}.
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For \SI{68}{\percent} of all installed transmitters, the estimated floor-number matched the real location.
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\newcommand{\tablefont}{\scriptsize}
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\begin{figure}
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% cumulative error density
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\centering
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\begin{subfigure}{0.52\textwidth}
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\input{gfx2/wifi_model_error_0_95.tex}
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\end{subfigure}
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% table
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\end{subfigure}%
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\begin{subfigure}{0.47\textwidth}
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\smaller
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\centering
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\begin{tabular}{|l|c|c|c|c|}
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\hline
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& 25 \% & median & 75 \% & avg \\\hline
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\noOptEmpiric{} & \SI{2.5}{\decibel} & \SI{5.6}{\decibel} & \SI{9.3}{\decibel} & \SI{6.5}{\decibel} \\\hline
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\optParamsAllAP{} & \SI{2.0}{\decibel} & \SI{4.3}{\decibel} & \SI{7.5}{\decibel} & \SI{5.4}{\decibel} \\\hline
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\optParamsEachAP{} & \SI{1.6}{\decibel} & \SI{3.3}{\decibel} & \SI{6.2}{\decibel} & \SI{4.4}{\decibel} \\\hline
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\optParamsPosEachAP{} & \SI{1.5}{\decibel} & \SI{3.0}{\decibel} & \SI{5.5}{\decibel} & \SI{3.8}{\decibel} \\\hline
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\optPerFloor{} & \SI{0.7}{\decibel} & \SI{1.6}{\decibel} & \SI{3.3}{\decibel} & \SI{2.6}{\decibel} \\\hline
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\optPerRegion{} & \SI{0.6}{\decibel} & \SI{1.4}{\decibel} & \SI{3.1}{\decibel} & \SI{2.4}{\decibel} \\\hline
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\end{tabular}
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\vspace{9mm}
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\begin{tabular}{|l|c|c|c|c|}
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\hline
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& \tablefont 25 \% & \tablefont median & \tablefont 75 \% & \tablefont avg \\\hline
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\tablefont\noOptEmpiric{} & \tablefont\SI{2.5}{\decibel} & \tablefont\SI{5.6}{\decibel} & \tablefont\SI{9.3}{\decibel} & \tablefont\SI{6.5}{\decibel} \\\hline
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\tablefont\optParamsAllAP{} & \tablefont\SI{2.0}{\decibel} & \tablefont\SI{4.3}{\decibel} & \tablefont\SI{7.5}{\decibel} & \tablefont\SI{5.4}{\decibel} \\\hline
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\tablefont\optParamsEachAP{} & \tablefont\SI{1.6}{\decibel} & \tablefont\SI{3.3}{\decibel} & \tablefont\SI{6.2}{\decibel} & \tablefont\SI{4.4}{\decibel} \\\hline
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\tablefont\optParamsPosEachAP{} & \tablefont\SI{1.5}{\decibel} & \tablefont\SI{3.0}{\decibel} & \tablefont\SI{5.5}{\decibel} & \tablefont\SI{3.8}{\decibel} \\\hline
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\tablefont\optPerFloor{} & \tablefont\SI{0.7}{\decibel} & \tablefont\SI{1.6}{\decibel} & \tablefont\SI{3.3}{\decibel} & \tablefont\SI{2.6}{\decibel} \\\hline
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\tablefont\optPerRegion{} & \tablefont\SI{0.6}{\decibel} & \tablefont\SI{1.4}{\decibel} & \tablefont\SI{3.1}{\decibel} & \tablefont\SI{2.4}{\decibel} \\\hline
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\end{tabular}
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\vspace{8mm}
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\end{subfigure}
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\caption{
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Cumulative error distribution for all optimization strategies. The error results from the (absolute) difference
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@@ -189,6 +194,7 @@
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\begin{figure}
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\centering
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\begin{subfigure}{0.32\textwidth}
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\centering
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\input{gfx2/wifiMaxErrorNN_opt0.tex}
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@@ -261,6 +267,7 @@
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region for the optimization to converge.
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\begin{figure}
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\centering
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\begin{subfigure}{0.49\textwidth}
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\input{gfx2/wifi_model_error_num_fingerprints_method_5_0_90.tex}
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\end{subfigure}
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@@ -414,6 +421,7 @@
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\end{figure}
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\begin{figure}
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\centering
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% error gfx
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\begin{subfigure}{0.52\textwidth}
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\centering
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@@ -427,19 +435,19 @@
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%4.30191 6.91534 14.0746 11.948
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%4.26189 6.35975 11.5646 10.7466
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\begin{subfigure}{0.47\textwidth}
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\smaller
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\footnotesize
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\centering
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\begin{tabular}{|l|c|c|c|c|}
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\hline
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& \SI{25}{\percent} & median & \SI{75}{\percent} & avg \\\hline
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\noOptEmpiric{} & \SI{6.0}{\meter} & \SI{9.2}{\meter} & \SI{14.4}{\meter} & \SI{11.9}{\meter} \\\hline
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\optParamsAllAP{} & \SI{6.5}{\meter} & \SI{9.0}{\meter} & \SI{12.8}{\meter} & \SI{12.0}{\meter} \\\hline
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\optParamsEachAP{} & \SI{6.8}{\meter} & \SI{9.8}{\meter} & \SI{13.8}{\meter} & \SI{13.0}{\meter} \\\hline
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\optParamsPosEachAP{} & \SI{5.4}{\meter} & \SI{8.6}{\meter} & \SI{14.8}{\meter} & \SI{12.0}{\meter} \\\hline
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\optPerFloor{} & \SI{4.3}{\meter} & \SI{6.9}{\meter} & \SI{14.0}{\meter} & \SI{11.9}{\meter} \\\hline
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\optPerRegion{} & \SI{4.2}{\meter} & \SI{6.5}{\meter} & \SI{11.6}{\meter} & \SI{10.7}{\meter} \\\hline
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& \tablefont\SI{25}{\percent} & \tablefont median & \tablefont\SI{75}{\percent} & \tablefont avg \\\hline
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\tablefont\noOptEmpiric{} & \tablefont\SI{6.0}{\meter} & \tablefont\SI{9.2}{\meter} & \tablefont\SI{14.4}{\meter} & \tablefont\SI{11.9}{\meter} \\\hline
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\tablefont\optParamsAllAP{} & \tablefont\SI{6.5}{\meter} & \tablefont\SI{9.0}{\meter} & \tablefont\SI{12.8}{\meter} & \tablefont\SI{12.0}{\meter} \\\hline
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\tablefont\optParamsEachAP{} & \tablefont\SI{6.8}{\meter} & \tablefont\SI{9.8}{\meter} & \tablefont\SI{13.8}{\meter} & \tablefont\SI{13.0}{\meter} \\\hline
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\tablefont\optParamsPosEachAP{} & \tablefont\SI{5.4}{\meter} & \tablefont\SI{8.6}{\meter} & \tablefont\SI{14.8}{\meter} & \tablefont\SI{12.0}{\meter} \\\hline
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\tablefont\optPerFloor{} & \tablefont\SI{4.3}{\meter} & \tablefont\SI{6.9}{\meter} & \tablefont\SI{14.0}{\meter} & \tablefont\SI{11.9}{\meter} \\\hline
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\tablefont\optPerRegion{} & \tablefont\SI{4.2}{\meter} & \tablefont\SI{6.5}{\meter} & \tablefont\SI{11.6}{\meter} & \tablefont\SI{10.7}{\meter} \\\hline
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\end{tabular}
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\vspace{9mm}
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\vspace{7mm}
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\end{subfigure}
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\caption {
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Cumulative error distribution between walked ground truth and \docWIFI{}-only location estimation using \refeq{eq:bestWiFiPos}.
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@@ -470,6 +478,7 @@
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% -------------------------------- plots indicating walk issues -------------------------------- %
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\begin{figure}
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\centering
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\input{gfx2/wifiMultimodality.tex}
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\caption{
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\docWIFI{}-only location probability for three distinct scans where
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@@ -652,6 +661,7 @@
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keep the pedestrian's heading until the signal quality reached sane levels again.
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\begin{figure}
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\centering
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\begin{subfigure}{0.49\textwidth}
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\input{gfx2/overall-system-error.tex}
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\end{subfigure}
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@@ -669,16 +679,16 @@
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\begin{tabular}{|l|c|c|c|c|c|}
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\hline
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& \SI{25}{\percent} & median & \SI{75}{\percent} & avg & stuck \\\hline
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\noOptEmpiric{} & \SI{2.6}{\meter} & \SI{5.1}{\meter} & \SI{11.2}{\meter} & \SI{9.0}{\meter} & \SI{22}{\percent} \\\hline
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\optParamsAllAP{} & \SI{2.9}{\meter} & \SI{6.0}{\meter} & \SI{12.4}{\meter} & \SI{10.7}{\meter} & \SI{15}{\percent} \\\hline
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\optParamsEachAP{} & \SI{1.9}{\meter} & \SI{4.0}{\meter} & \SI{7.9}{\meter} & \SI{5.8}{\meter} & \SI{5}{\percent} \\\hline
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\optParamsPosEachAP{} & \SI{1.9}{\meter} & \SI{3.9}{\meter} & \SI{7.1}{\meter} & \SI{5.6}{\meter} & \SI{5}{\percent} \\\hline
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\optPerFloor{} & \SI{1.6}{\meter} & \SI{3.2}{\meter} & \SI{6.1}{\meter} & \SI{4.8}{\meter} & \SI{4}{\percent} \\\hline
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\optPerRegion{} & \SI{1.6}{\meter} & \SI{3.3}{\meter} & \SI{6.5}{\meter} & \SI{5.0}{\meter} & \SI{4}{\percent} \\\hline
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& \tablefont\SI{25}{\percent} & \tablefont median & \tablefont\SI{75}{\percent} & \tablefont avg & \tablefont stuck \\\hline
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\tablefont\noOptEmpiric{} & \tablefont\SI{2.6}{\meter} & \tablefont\SI{5.1}{\meter} & \tablefont\SI{11.2}{\meter} & \tablefont\SI{9.0}{\meter} & \tablefont\SI{22}{\percent} \\\hline
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\tablefont\optParamsAllAP{} & \tablefont\SI{2.9}{\meter} & \tablefont\SI{6.0}{\meter} & \tablefont\SI{12.4}{\meter} & \tablefont\SI{10.7}{\meter} & \tablefont\SI{15}{\percent} \\\hline
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\tablefont\optParamsEachAP{} & \tablefont\SI{1.9}{\meter} & \tablefont\SI{4.0}{\meter} & \tablefont\SI{7.9}{\meter} & \tablefont\SI{5.8}{\meter} & \tablefont\SI{5}{\percent} \\\hline
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\tablefont\optParamsPosEachAP{} & \tablefont\SI{1.9}{\meter} & \tablefont\SI{3.9}{\meter} & \tablefont\SI{7.1}{\meter} & \tablefont\SI{5.6}{\meter} & \tablefont\SI{5}{\percent} \\\hline
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\tablefont\optPerFloor{} & \tablefont\SI{1.6}{\meter} & \tablefont\SI{3.2}{\meter} & \tablefont\SI{6.1}{\meter} & \tablefont\SI{4.8}{\meter} & \tablefont\SI{4}{\percent} \\\hline
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\tablefont\optPerRegion{} & \tablefont\SI{1.6}{\meter} & \tablefont\SI{3.3}{\meter} & \tablefont\SI{6.5}{\meter} & \tablefont\SI{5.0}{\meter} & \tablefont\SI{4}{\percent} \\\hline
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\end{tabular}
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\setlength{\tabcolsep}{1.0em} % reset the horizontal padding
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\vspace{11.5mm}
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\vspace{9.0mm}
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\end{subfigure}
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%
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\caption{
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