文学 计算语言学 释 text data mining 文本数据挖掘 从大规模真实文本数据中发现或推出新的信息，找出文本数据集合的模型，发现文本数据中所隐含的趋势，从文本数据的噪声中分离出有用的信号。
数据库 特种数据库 释文 text data mining 文本数据挖掘
- ultraviolet-visible spectrophoto meter
- ultraviolet-visible spectrophotometer
- ultraviolet visible spectrophotometry
- ultraviolet-visible spectrophotometry
- ultraviolet warning device
- ultra-voilet photography
- ultraweak
- ultraweak operator topology
- ultraweak topology
- ultra-white
- ultra wide angle lens
- ultra-wideband
- ultra wideband antennas
- ultra-wideband antennas
- ultra wideband communications
- ultra wide band positioning technology
- ultra-wideband radar signal
- ultra-wideband, UWB
- ultra wideband wireless systems
- ultra-wideband wireless systems
- ultrocold neutron
- Ulugata Hydro-Junction
- Ulugh
- Ulugh Beg
- Ulugh Beg Observatory