中国科学院机构知识库网格系统: 检索

Changes of Light Components and Impacts on Interannual Variations of Photosynthesis in China Over 2000-2017 by Using a Two-Leaf Light Use Efficiency Model 期刊论文 OAI收割
JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES, 2020, 卷号: 125, 期号: 12, 页码: 18
作者: Yan, H.; Wang, S. Q.; Wang, J. B.; Shugart, H. H.

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收藏 | 浏览/下载：30/0 | 提交时间：2021/03/15

light components gross primary production light use efficiency big‐ leaf model two‐ leaf model

Effects of Light Component and Water Stress on Photosynthesis of Amazon Rainforests During the 2015/2016 El Nino Drought 期刊论文 OAI收割
JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES, 2019, 卷号: 124, 期号: 6, 页码: 1574-1590
作者: Yan, Hao; Wang, Shao-qiang; Huete, Alfredo; Shugart, Herman H.

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收藏 | 浏览/下载：79/0 | 提交时间：2019/09/24

Amazon rainforests 2015 2016 El Nino light components diffuse fraction canopy light use efficiency photosynthesis

Simulating the spatial resolution of the framing camera 会议论文 OAI收割
3rd international symposium on monitoring, early warning, removal technology of space targets and debris, the 4th international conference on frontiers in optical imaging technology and applications, and the 2nd international symposium on photoelectric defense technologies, beijing and changchun, china, 2016-07-22
作者: Bai, Xiaohong; Zhu, Bingli; Xu, Peng; Wang, Bo; Gou, Yongsheng

收藏 | 浏览/下载：43/0 | 提交时间：2017/01/04

Cameras Computer simulation Finite element method Fluorescence Image resolution Image storage tubes Imaging techniques Light emission Monte Carlo methods Plates (structural components) Space debris

Biomass allocation patterns of alpine grassland species and functional groups along a precipitation gradient on the Northern Tibetan Plateau SCI/SSCI论文 OAI收割
2013
Wu J. S.; Shen Z. X.; Zhang X. Z.; Shi P. L.

收藏 | 浏览/下载：31/0 | 提交时间：2014/12/24

Biomass fractions Complementary response Functional components Functional groups Changtang Plateau china grasslands inner-mongolia climate-change plants root allometry traits light plasticity ratios

Stray light analysis of solar photoelectric detection system on space target (EI CONFERENCE) 会议论文 OAI收割
2012 International Conference on Intelligent System and Applied Material, GSAM 2012, January 13, 2012 - January 15, 2012, Taiyuan, Shanxi, China
Li L.-Y.; Wang Y.-F.; San X.-G.

收藏 | 浏览/下载：143/0 | 提交时间：2013/03/25

Most conventional spacious solar photoelectric detection systems suffer from unexpected stray light. This paper demonstrates the effects on photoelectric detection system bring out by stray light. On this foundation build up evaluation index of stray light system to search the reasonable programme to eliminating stray light. A detailed telescope system geometry model was created and scatter models were create for telescope and enclosure components. By the means of designing the structure of main baffle baffle vane and the coating technology. In order to verify the prosperity of structure that designed we utilizes software to analysis opto-mechanical model. we utilizes software to analysis opto-mechanical model. The simulations show that point source transmittance of the system is thus reduced by up to two orders of magnitude between 10-8 and 10-10. Meanwhile the experiment obtains clean detection data which satisfies the system requirements. Stray light has been suppressed effectually and so measurement precision was improved from detection graphics. (2012) Trans Tech Publications.

Structure optimization of strap-down inertial navigation system support (EI CONFERENCE) 会议论文 OAI收割
2011 2nd International Conference on Mechanic Automation and Control Engineering, MACE 2011, July 15, 2011 - July 17, 2011, Inner Mongolia, China
作者: Wang J.; Sun H.; Sun H.

收藏 | 浏览/下载：31/0 | 提交时间：2013/03/25

In order to meet the requirement of inertial navigation components and minimizing the system's weight and topological optimization was conducted. Then topological optimization and size optimization were conducted under conditions of random vibration and impact. Firstly according to the dynamic characteristics of missile and requirement of inertial navigation system the structure of inertial navigation support was designed according to types of missile connection and space arrangement of electronic components the method of transforming multi-loading cases to multi-loading constraints was used to optimizing the size of the support under conditions of random vibration and impact. Comparing to the original support structures RMS accelerations in installed points reduced by 25.2% under random vibration the weight of optimal structures reduced by 28.1% the structures also met the requirement of inertial navigation system under condition of impact. The support structure shows improvements in both dynamic characteristic and light weight comparing with the original one. 2011 IEEE.

Non-linear compensation algorithm of LOS locating in aerial remote sensor (EI CONFERENCE) 会议论文 OAI收割
2011 International Conference on Electronic and Mechanical Engineering and Information Technology, EMEIT 2011, August 12, 2011 - August 14, 2011, Harbin, China
作者: Li J.; Li Y.; Li Y.; Li Y.; Li Y.

收藏 | 浏览/下载：34/0 | 提交时间：2013/03/25

A non-linear light-of-sight(LOS) locating compensation algorithm for certain aerial remote sensor is presented in this paper. The LOS locating system is composed of two main components which are an inertial reference frame to provide coarse LOS locating and a 2-axis Fast Steering Mirror to remove the frame's residual error. The azimuth and elevation of LOS are both affected by the FSM two-degree-of-freedom rotation which should be dealt with to raise the accuracy of LOS location. This paper extrapolates LOS locating algorithm of FSM by coordinate transformation and gives corresponding deviation analysis for different LOS poiting angles. It is found that the angle deviation grows rapidly with range of FSM's travel enlarging so the deviation must be eliminated. Through the data analysis for deviation a non-linear compensation algorithm is proved effective to reduce the error of LOS significantly. Taking LOS changing in [-3 deg 3 deg] as an example two analytic expressions are given and the LOS locating accuracy rises by 34 times compared with non-linear compensation unused and the cross coupling of LOS loating is 0.08%. 2011 IEEE.

Micro assembled fourier transform spectrometer (EI CONFERENCE) 会议论文 OAI收割
4th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test and Measurement Technology and Equipment, November 19, 2008 - November 21, 2008, Chengdu, China
作者: Liang J.-Q.; Zhang J.; Zhang J.; Zhang J.; Wang B.

收藏 | 浏览/下载：29/0 | 提交时间：2013/03/25

With the trend of minimization of Fourier transform spectrometer (FTS) which is particularly pronounced in many applications a model of a micro FTS with no moving parts is proposed and analyzed. During analyzng the gradients which mainly introduce phase error are accounted. Based on these assumptions and the improved Mertz phase correcting method the spectrum of signal is simulated with real extended light source. The resolution can be up to 3.43nm@800nm with high signal-to-noise ratio (SNR) limiting resolving ability 6.8dB. In addition the fabrication method of components are illuminated and demonstrated which can not only make it bear some advantages over conventional micro dispersive spectrometers but also afford some new concepts on the design of spectrometers with improved performance. 2009 SPIE.

On-chip phase shift refractometer via microfluidic liquid grating 会议论文 OAI收割
TRANSDUCERS 2009 - 15th International Conference on Solid-State Sensors, Actuators and Microsystems, Denver, CO, United states, June 21, 2009 - June 25, 2009
作者: Li ZG; Liu B; Zhang JB; Li ZH(李战华); Liu AQ

收藏 | 浏览/下载：20/0 | 提交时间：2017/07/14

Laser light beams Microfluidic chip Multi-channel Multichannel mircofluidic chip On chips Optical components Soft lithography Transmission phase

Effect of immersion in various media on the sorption, solubility, elution of unreacted monomers, and flexural properties of two model dental composite compositions 期刊论文 OAI收割
journal of materials science-materials in medicine, 2008, 卷号: 19, 期号: 6, 页码: 2477-2483
Zhang YJ; Xu JW

收藏 | 浏览/下载：169/24 | 提交时间：2010/04/14

CHROMATOGRAPHY MASS-SPECTROMETRY RESIN COMPOSITES WATER SORPTION HYGROSCOPIC EXPANSION RESTORATIVE MATERIALS SIMULATING FLUIDS RESIDUAL MONOMERS HPLC ANALYSIS COMPONENTS LIGHT