The possible importance of CSO for the sulfate layer of the stratosphere An operational semantics for CSO CSO-based feature selection and parameter optimization for support vector machine Anti-parallel PI PIN attenuator structure with improved CSO performance Possible importance of CSO for sulfate layer of stratosphere YSO, LSO, CSO and LGSO. A study of energy resolution and nonproportionality Spectroscopic Observations of Comet C/1999 H1 (Lee) with the SEST, JCMT, CSO, IRAM, and NanÇay Radio Telescopes Hybrid Optimization in Big Data: Error Detection and Data Repairing by Big Data Cleaning Using CSO-GSA Linking Documents to Encyclopedic Knowledge Wikify!: linking documents to encyclopedic knowledge