1Factor analysis on coal mine submerged in water breaking in north shore of Xiaolangdi Reservior Sluice241-243
3Geographical, meteorological phenomena and the mankind activities factors of controlling high fluorine content in groundwater in Yongcheng mining area 248-250
5Basic standard of control surveying and management information system for its positive results of Wenxian county256-258
9Analysis of orthogonal subspace of incomplete controlled space of linear system and its vivid presentation of low dimension271-274
