图 书 馆
形态学习作为原则性论证Morphological Learning as Principled Argument |
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| 课程网址: | http://videolectures.net/pcw06_johnsen_mlpa/ |
| 主讲教师: | Lars G Johnsen |
| 开课单位: | 卑尔根大学 |
| 开课时间: | 2007-02-25 |
| 课程语种: | 英语 |
| 中文简介: |  |
| 课程简介: | We develop a morphological learner that evaluates evidence supporting specific claims that a string of letters is a distributional meaningful unit. The distributional evidence is evaluated by selectional properties of morphs, while evidence towards meaning is modelled by looking at the relationship between stems and words. To assess a proposed affix, it gets a probability measure of meaning by comparing all the possible stems the affix occur with to the particular subset that also occur as words. Since for a stem to be a word counts as evidence towards its meaning, the ratio formed by taking stems that are words to the whole set of possible stems for an affix gives a predictive probability measure for the affix that measures the chance that it has combined with a meaningful stem. This measure, taken in conjunction with the selectional statistics of stems and affixes, provides a basis for deciding on the best morphological structure for a given word. The results for English show a combined precision and recall of 45. |
| 关 键 词: | 计算机科学; 自然语言处理; 关系建模 |
| 课程来源: | 视频讲座网 |
| 最后编审: | 2020-06-01：wuyq |
| 阅读次数: | 27 |