A novel zinc(Ⅱ) complex, Zn(IBT) 2 (1, HIBT=5-(4-((1H-imidazol-1-yl)methyl)phenyl)-2H-tetrazole) has been synthesized w......

We report a simple Nd:YAG laser that emits radially polarized beam with helical wavefront. The laser cavity consists of ......

The EGR (exhaust gas recirculation) technique can greatly reduce the NOx emission of diesel engines, especially when an ......

A novel ellipsoidal helical antenna is proposed and studied in this letter. As a special in-stance,the hemispherical hel......

为探究吕家坨井田地质构造格局,根据钻孔勘探资料,采用分形理论和趋势面分析方法,研究了井田7......

目的 研究宫颈癌术后螺旋断层放疗(helical tomotherapy,HT)与常规静态调强放疗(IMRT)的剂量学特点.方法 采用10例宫颈癌术后患者C......