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Chinese Academy of Sciences Institutional Repositories Grid
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Distribution, pollution, and ecological risks of rare earth elements in soil of the northeastern Qinghai-Tibet Plateau 期刊论文  OAI收割
HUMAN AND ECOLOGICAL RISK ASSESSMENT, 2019, 卷号: 25, 期号: 7, 页码: 1816-1831
作者:  
Wu, J;  Lu, J;  Li, LM;  Min, XY;  Zhang, ZH
  |  收藏  |  浏览/下载:35/0  |  提交时间:2020/07/08
Development and Application of Transposable Element-Based Chromosomal Markers for the St Genome in Triticeae 期刊论文  OAI收割
CYTOGENETIC AND GENOME RESEARCH, 2019, 卷号: 159, 期号: 4
作者:  
Liu, Ruijuan;  Yu, Feng
  |  收藏  |  浏览/下载:17/0  |  提交时间:2020/11/25
Analysis of the elemental composition of Tang Sancai from the four major kilns in China using EDXRF 期刊论文  OAI收割
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS, 2014, 卷号: 319, 页码: 95-99
作者:  
Ma B(马波);  Liu L(刘珑);  Feng SL(冯松林);  Xu Q(徐清);  冯向前;Ma, B
收藏  |  浏览/下载:38/0  |  提交时间:2016/04/08
新疆柴窝堡地区沉积物元素地球化学特征及其环境意义[J] 期刊论文  OAI收割
自然资源学报, 2013, 卷号: 7, 页码: 1221-1231
作者:  
马龙;  吴敬禄;  吉力力·阿不都外力;  中国科学院新疆生态与地理研究所荒漠与绿洲生态国家重点实验室;  中国科学院南京地理与湖泊研究所湖泊与环境国家重点实验室
  |  收藏  |  浏览/下载:43/0  |  提交时间:2017/12/29
Random noise filtering technology of piezoelectricity gyro (EI CONFERENCE) 会议论文  OAI收割
2010 International Conference on Computer, Mechatronics, Control and Electronic Engineering, CMCE 2010, August 24, 2010 - August 26, 2010, Changchun, China
Qingjun L.; Yongming Y.
收藏  |  浏览/下载:34/0  |  提交时间:2013/03/25
Inertia sensing elements are usually adopted as the sensors of velocity stabilization loop in airborne photoelectric equipments  therefore we need to adopt filtering processing to reduce influence to control system. In this paper  which are constituted stabilized control system  we analyze the characteristic of noise gyro drift  that purpose is reducing the influence of the movement of carrier to visual axis of photoelectric probing system. But gyro  and utilize Kalman filtering technology to conduct filtering processing to output signal of gyro  especially the piezoelectricity gyro generates drift  this method can reduce output noise effectively. The simulation results show that the proposed filtering processing method can improve the low velocity characteristic. 2010 IEEE.  which is the main error source of photoelectric stabilized control system  
Theoretical analysis of 980nm high power Vertical External-cavity Surface-emitting Semiconductor Laser (VECSEL) (EI CONFERENCE) 会议论文  OAI收割
ICO20: Lasers and Laser Technologies, August 21, 2005 - August 26, 2005, Changchun, China
作者:  
Wang L.-J.;  Wang L.-J.;  Ning Y.-Q.;  Qin L.
收藏  |  浏览/下载:23/0  |  提交时间:2013/03/25
By using bottom-emitting structure  we will develop laser diode (LD) pumped 980 nm VECSEL with active region of InGaAs/GaAsP/AlGaAs system. Because the thickness of barrier layer and absorption layer exceed that of quantum well  single well approximation model (KP method) can be used to calculate the band structure of VECSEL. The Schrodinger equation of finite deep potential well can be adopted to calculate the energy level structures of electron  heavy and light holes. According to the transition selection rule  we theoretically obtained the emitting wavelength of VECSEL and calculated quasi-Femi energy of valence band and conduction band based on the analysis of energy level structure of electron and holes. By analyzing the gain of strained quantum wells  we calculated the gain of VECSEL using transition matrix elements of electron  heavy and light holes. We give out the threshold gain  output power and other characteristic parameters. We will study the configuration of VECSEL and pumping scheme. We designed external cavity mirror  active region and bottom-emitting structure. A LD-pumped vertical external cavity surface-emitting laser whose output power is greater than 1.0 W can be predicted.