SUN, Yan-min, Zhengzhou Normal University, Zhengzhou 450044, China, China

• Journal of Progressive Research in Mathematics Vol 15 No 1: JPRM - Articles
  Spatial Distribution Characteristics and Evolution Pattern of Air Quality in Henan Province
  Abstract  PDF
• Journal of Progressive Research in Mathematics Vol 15 No 2: JPRM - Articles
  Correlation Analysis of Main Pollutant Concentration-A Case Study of Zhengzhou
  Abstract  PDF