Difference between revisions of "ISSS608 2016-17 T3 Assign LIU XINTIAN Questions & Solutions"
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Revision as of 22:06, 7 July 2017
VAST Challenge 2017 - Mini Challenge 2
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Question 1
Characterize the sensors’ performance and operation. Are they all working properly at all times? Can you detect any unexpected behaviours of the sensors through analysing the readings they capture?
Checking monitors working improperly
The line chart on the right shows the reading of four chemicals changed by day in the same hour in three months. Each line represents a sensor. In this way, we can find that there are some missing values at 0:00am in the beginning of these three months. This means all the sensors are not working properly at these specific times. The table below shows the missing value of each sensor, which means they are not working at 0:00am on these days or the sensors may be in maintenance period or some other conditions that cannot work. (work = “Y”, Not work = “N”)
| Date\Sensor !! 1 !! 2 !! 3 !! 4 !! 5 !! 6 !! 7 !! 8 !! 9 | |||||||||
| Apr 2nd | N | N | N | N | N | N | N | N | N |
| Apr 6th | N | N | N | N | N | N | N | N | N |
| Aug 2th | N | N | Y | N | N | N | N | N | N |
| Aug 4th | N | N | N | N | N | N | N | N | N |
| Aug 7th | N | N | N | N | N | N | N | N | N |
| Dec 2th | N | N | N | N | N | N | N | N | N |
| Dec 7th | N | N | N | N | N | Y | Y | Y | N |
