An effective route to improve the catalytic performance of SAPO-34 in the methanol-to-olefin reaction by simple oxalic acid treatment was investigated.The sampl
Objective:Caudal epidural analgesia has become very common analgesic technique in paediatric surgery.Adding tramadol to bupivacaine for caudal injection prolong
2001 年第17卷第4期摘要PERCENTAGE POINTS AND POWER OF A K-S TYPE TEST FOR LINEARTIYIN AUTOREGRESSIVE TIME SERIES CHEN GENMAI, CHEN MIN, WU GUOFUThe empirical upp