数据库 数据库新技术 释文 inverse document frequency, IDF 反文档频率 人工智能 计算语言学 释文 inverse document frequency 逆向文档频率
- doublet flow
- doublet function
- double thread polymer
- double-time Green function
- double-time Green's function
- doublet lens
- doublet objective
- double torus
- double-track grain prices system
- double tracks sign
- double track system for electronic records and paper records
- double trailer combination vehicle
- double transformation
- double-transistor random-access memory
- double transit
- double transitive group
- double triangle lattice
- doublet structure
- double twist
- double twist of filament
- double twist of staple yarn
- double value
- double-valued function
- double valuedness
- double valued representation