packaging waste

2-DE,CDFI,PW and CDPI in diagnosis of hepatocellular carcinoma;

2-DE、CDFI、PW和CDPI诊断原发性肝癌

By introducing PW method into modern advanced optical design software, it can automatically change glass according to the designer s needs to meet the requirements of rational distribution of primary aberrations in the entire optical system.

运用PW法来更换 光学系统中的玻璃材料使初级像差减小或按要求重新分布像差是可行的。

The PW-SiO_2 catalysts were prepared respectively by impregnation and sol-gel method and then were app.

采用浸渍和溶胶—凝胶法分别制备了PW-SiO_2催化剂，并将其用于模拟汽油和FCC汽油的烷基化反应，考察了制备方法、载体类型、活化温度对催化剂催化活性的影响。