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| 1 | 4.1 Ga old detrital zircon in western Tibet of China显示文摘4.1 Ga old detrital zircon was found by SHRIMP U-Pb dating for quartz schist from Buring County in western Tibet, Southwest China. This is the oldest zircon U-Pb age found in China so far. The detrital zircon is a zircon of magmatic origin because its Th/ U ratios are 0.76 to 0.86. Two dates older than 4.0 Ga were measured only in one grain. U-Pb ages of 35 measured spots in 24 zircons can be subdivided into 6 groups, corresponding to at least 6 episodes of magmatic activity in the target area. The present results provide an important geochronological constraint on the geological evolution of Qinghai-Tibet Plateau. | DUO Ji WEN ChunQi GUO JianCi FAN XiaoPing LI XiaoWen | 2007 | Chinese Science Bulletin2007，52，1： | 11 |
| 2 | ANALYTICAL SOLUTION OF FILLING AND EXHAUSTING PROCESS IN PNEUMATIC SYSTEM显示文摘在一个灵魂系统充满和令人疲乏不堪的进程涉及许多因素,并且许多部分微分方程的数字解决方案总是在那些进程的学习被改编,它被证明了麻烦、不太直觉。基于无损失的试管模型和平均磨擦试管,模型被使用液体分别地发现的分析解决方案捕捞理论,并且他们适合试验性的结果很好。研究工作显示出那:液体网理论能被用来解决充满和灵魂系统的令人疲乏不堪的过程的分析答案,并且无损失的试管模型的结果接近平均磨擦模型的,因此自从它更简单,无损失的试管模型被推荐,并且充满时间和令人疲乏不堪的时间之间的差别被起始、最后的压力,容器的体积和试管的节区域决定,并且与试管的长度没关系。 | JIN Yingzi YANG Qingjun WANG Zuwen ZHANG Jianci | 2006 | Chinese Journal of Mechanical Engineering2006，19，1： | 2 |
| 3 | Improving suction performance of centrifugal pumps by using jetting device显示文摘 | CUI Baoling ZHU Zuchao ZHANG Jianci | | 0，，5： | 1 |
| 4 | Detrital Zircon of 4100 Ma in Quartzite in Burang,Tibet显示文摘A detrital zircon aged 4.1 Ga is discovered by the SHRIMP U-Pb method in a quartzite in Burang County, western Tibet. This is presently the oldest single-grain detrital zircon in China. The Th-U ratios of the two testing points of the >4.0 Ga zircon are between 0.76 and 0.86, indicating their magmatic origin. This discovery has offered an important age for investigating the geological evolution of the Qinghai-Tibet Plateau. | DUO Ji WEN Chunqi FAN Xiaoping GUO Jianci NI Zhiyao LI Xiaowen SHI Yuruo WEN Quan | 2006 | Acta Geologica Sinica(English Edition)2006，80，6： | 0 |
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