Unknown Chinese word extraction based on variety of overlapping strings

Not all languages, e.g. Chinese, have delimiters for words. To extract words from a sentence in these languages, we usually rely on a dictionary for known words. For unknown words, some approaches rely on a domain specific dictionary or a tailor-made learning data set. However, this information may not be available. Another direction is to use unsupervised methods. These methods rely on a goodness measure to evaluate how likely the words are meaningful based on a statistical argument on the give