This problem is about detecting anomalous nodes in a sensor network. Using GSPBox, create a 60-node random sensor network and define a signal f on the graph as
where c = 0.1 is a constant and d (i, j) is the distance between nodes i and j (can be found
using Dijkstra’s shortest path algorithm). This signal can be thought of as temperature values
in a geographical area, since the variations in temperature values are not high if the sensors are
placed densely. Now introduce some anomaly in the graph signal by making the temperature
values zero for sensors 18 and 39.
In Problem 12 of Chapter 10, the anomaly can be detected using GFT; however, one could not
locate the anomalous nodes. Use SGWT to find the anomalous nodes from the temperature
data you created. Write down the step-by-step procedure and explain why your procedure
works.
This problem is a computer-based exercise. You may use an appropriate software such Matlab
for solving this problem. Some useful code fractions can be found at the support website:
https://complexnetworksbook.github.io
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The IP address 172.30.44.19 cannot be used on the Internet.
Answer the following statement true (T) or false (F)
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A. slacker B. hacker C. white-hat D. black-hat
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A. padding property B. size of the screen C. width of the largest view D. width property