中文摘要：

对加权射影空间CP（Q）进行了加权blowup，分析了blowup后的toric结构和orbifold结构，以及所有twistedsector的变化。用组合论的方法计算了blowup前后每个twistedsector的奇异上同调，并且分析了其陈一阮上同调群的变化。

英文摘要：

The weighted projective space CP^n（Q） is blown up, and the toric structure and orbifold structure of the blowup is analyzed. The singular cohomology of each twisted sector is claculated by com-binatorics. The difference between the Chen - Ruan cohomology group of CP^n（Q） and ones of its blowup is also analyzed.