Get to the bottom of the two different serial listViterbi algorithms (1994 and 2001)

[cdawei]

Understand the details of the two versions of serial list Viterbi algorithms:

• Sequentially finding the N-best list in hidden Markov models
• List Viterbi decoding algorithms with applications

[cdawei]

Try to understand why current approach does not work well on all datasets.

[cdawei]

Resolved in 6267133