This appears to be a paper written for satisfying a CS Master's degree requirement. If you are looking for a survey on this topic, this is probably a better starting point: https://arxiv.org/abs/1504.00616
I personally hate non-dated preprints or technical reports. Only way to guess is to use max(date(ppaper) for paper in references), which may or may not be close the the actual date of writing.
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[ 5.0 ms ] story [ 57.9 ms ] threadThis was most likely done to satisfy that requirement to earn a MS "along the way" to a PhD.
"Submitted for the fulfillment of requirement of a Scholarly Paper for Master of Science without thesis option."
I personally hate non-dated preprints or technical reports. Only way to guess is to use max(date(ppaper) for paper in references), which may or may not be close the the actual date of writing.