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	Development trend and prospect of solid phase extraction technology 期刊论文 OAI收割 CHINESE JOURNAL OF CHEMICAL ENGINEERING, 2022, 卷号: 42, 页码: 245-255 作者: Zhang, Chao; Xing, Huifang; Yang, Liangrong; Fei, Pengfei; Liu, Huizhou \| 收藏 \| 浏览/下载：26/0 \| 提交时间：2022/06/15 Solid phase extraction Papers output scale Quality of research Novel technology
	Analyzing the Research Evolution in Response to COVID-19 期刊论文 OAI收割 ISPRS INTERNATIONAL JOURNAL OF GEO-INFORMATION, 2021, 卷号: 10, 期号: 4, 页码: 24 作者: Li, Weirong; Sun, Kai; Zhu, Yunqiang \| 收藏 \| 浏览/下载：55/0 \| 提交时间：2021/06/10 COVID-19 papers research evolution correlation text mining
	Analyzing the Research Evolution in Response to COVID-19 期刊论文 OAI收割 ISPRS INTERNATIONAL JOURNAL OF GEO-INFORMATION, 2021, 卷号: 10, 期号: 4, 页码: 24 作者: Li, Weirong; Sun, Kai; Zhu, Yunqiang; Song, Jia; Yang, Jie \| 收藏 \| 浏览/下载：10/0 \| 提交时间：2021/06/10 COVID-19 papers research evolution correlation text mining
	Identification and Analysis of Innovation Value Stages in Research Fronts and Follow-up Studies 会议论文 OAI收割 Atlanta，USA, 2019-10-17 作者: Zhang D(张迪); Leng FH(冷伏海) \| 收藏 \| 浏览/下载：39/0 \| 提交时间：2019/11/13 Research Fronts Innovative Value Stage Tracking Citing Papers Author's Follow-up Research Paper
	从SCI论文统计分析看肉苁蓉研究水平及发展/Analysis of the Research and Development of Cistanche from Statistical Results of SCI Papers[J] 期刊论文 OAI收割科技广场, 2014, 卷号: 6, 页码: 103-107 作者: 刘渠华; 李宏建; 李文芯; Liu Quhua; Li Hongjian \| 收藏 \| 浏览/下载：25/0 \| 提交时间：2017/12/29 Sci 科研评价论文收录统计分析肉苁蓉 Sci Research And Evaluation Papers Included Statistical Analysis Cistanche
	IESRL： An information extraction system for research level 期刊论文 OAI收割 Chinese Journal of Library and Information Science, 2013, 卷号: 6, 期号: 4, 页码: 16-27 作者: LENG Fuhai 收藏 \| 浏览/下载：45/0 \| 提交时间：2014/02/26 Research papers Information extraction Semantic labeling Regular expression Conditional random fields Research level
	Research on the close noise field of the piezoelectric pump (EI CONFERENCE) 会议论文 OAI收割 2006 IEEE International Conference on Mechatronics and Automation, ICMA 2006, June 25, 2006 - June 28, 2006, Luoyang, China Jizhuang L.; Jianhui Z.; Shouyin W.; Qixiao X.; Desheng L. 收藏 \| 浏览/下载：54/0 \| 提交时间：2013/03/25 Restraining the noise meanwhile improving the dynamic characteristics of the driving power of piezoelectric pump effectively are the final purposes of doing research on the reciprocating and flexural vibration of the piezoelectric vibrator. However among many papers regarding piezoelectric pump there are very few papers about the research on the noise of piezoelectric pump. This is far less than the research on the application of the piezoelectric pump in other fields. In this paper the research on the flexural vibration deformation and vibration radiation noise of the piezoelectric vibrator are carried out. Firstly the vibration equations of the piezoelectric vibrator are built and flexural vibration deformation function is deduced. Then the simplified vibration model of the piezoelectric vibrator is introduced by using vibration theories of micro-area piston. Furthermore theoretical calculation equations of sound pressure in close noise field and noise contribution equation of fluid in pump are deduced. Finally a comparison is made between the theoretical calculation value and experimental value and the contribution quantities of the piezoelectric vibrator and fluid in pump are obtained respectively under different frequencies. The consequence approves that the theory introduced by this research is true. 2006 IEEE.