理学 降维 释 dimensionality reduction 降维 模式识别和机器学习领域中的降维就是指采用某种映射方法，将原高维空间中的数据点映射到低维度的空间中。
数据库 数据库新技术 释文 dimensionality reduction 降维
- bounded error probabilistic polynomial time class BPP
- bounded error quantum polynomial time
- bounded error quantum polynomial time class BQP
- bounded estimator method
- bounded existential quantifier
- bounded field
- bounded figure
- bounded filtration
- bounded formula
- bounded from above
- bounded from below
- bounded from zero
- bounded function
- bounded functional
- bounded graded object
- bounded group
- bounded heuristic method
- bounded holomorphic differential
- bounded homogeneous domain
- bounded index
- bounded-input bounded-output
- bounded input bounded output stability
- bounded input-bounded output stability
- bounded invertible operator
- bounded lag