中国科学院机构知识库网格系统: 检索

Spatial, Temporal and Genetic Dynamics Characteristics of Influenza B Viruses in China, 1973-2018 期刊论文 OAI收割
VIROLOGICA SINICA, 2019, 页码: 7
作者: Li, Xiaowen; Chan, Karen Kie Yan; Xu, Bo; Lu, Ming; Xu, Bing

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收藏 | 浏览/下载：26/0 | 提交时间：2020/05/19

Influenza B viruses Effective population size Phylogeographic Spatial dispersion Mainland China

Controllable synthesis of SiO2 nanoparticles: effects of ammonia and tetraethyl orthosilicate concentration 期刊论文 OAI收割
MICRO & NANO LETTERS, 2016, 卷号: 11, 期号: 12, 页码: 885-889
作者: Yan, Y (Yan, Yue); Fu, J (Fu, Jie); Xu, L (Xu, Ling); Wang, TF (Wang, Tianfu); Lu, XY (Lu, Xiuyang)

收藏 | 浏览/下载：35/0 | 提交时间：2017/02/14

silicon compounds nanoparticles nanofabrication ammonia organic compounds particle size controllable synthesis ammonia-tetraethyl orthosilicate concentration effects drug carriers drug delivery systems Stober method dynamic light scattering scanning electron microscopy nanoparticle size dispersion SiO2 NH3

Photoluminescence and cathodoluminescence properties of Li+ doped Gd1.88Eu0.12O3 期刊论文 OAI收割
journal of the ceramic society of japan, 2015, 卷号: 123, 期号: 1442, 页码: 989-994
作者: Kang, Yipu; Shimokawa, Yohei; Ishihara, Yasutaka; Tsuji, Hitoshi; Hashimoto, Shinobu

收藏 | 浏览/下载：23/0 | 提交时间：2016/12/01

Gd2O3:Eu3+:Li+ Photoluminescence Cathodoluminescence Dispersion property Crystallite size Specific surface area

Regeneration and Enhanced Catalytic Activity of Pt/C Electrocatalysts 期刊论文 OAI收割
acs catalysis, 2015, 卷号: 5, 期号: 1, 页码: 233-240
作者: Ruan,Mingbo; Sun,Xiujuan; Zhang,Yuwei; Xu,Weilin

收藏 | 浏览/下载：21/0 | 提交时间：2016/05/03

PLATINUM NANOPARTICLES OXYGEN REDUCTION FUEL-CELL OXIDATION REDISPERSION PERFORMANCE DISPERSION ALUMINA GOLD SIZE

Effect of multicomponent dust grains in a cold quantum dusty plasma 期刊论文 OAI收割
Chinese Physics B, 2012, 卷号: 21, 期号: 5
作者: Yang XF(杨秀峰); Wang SJ(王善进); Chen JM(陈建敏); Shi YR(石玉仁); Lin MM(林麦麦)

收藏 | 浏览/下载：18/0 | 提交时间：2016/04/07

quantum dusty plasma dispersion relation dust size distribution

Evaluation of the operating range for ground-based infrared imaging tracking system (EI CONFERENCE) 会议论文 OAI收割
International Symposium on Photoelectronic Detection and Imaging 2011: Advances in Infrared Imaging and Applications, May 24, 2011 - May 24, 2011, Beijing, China
作者: Zhang Z.-D.

收藏 | 浏览/下载：47/0 | 提交时间：2013/03/25

Ground-based infrared imaging tracking system (GIITS) is of great importance for aerial target warning and guard. The operating range is one of the key performance specifications on the other which should be calculated calculate the radiation power received on the detector in order to analysis whether the output signal meets the detection requirements or not analyzed and studied during the whole GIITS design process. The operating range is mostly influenced by a few factors without considering the effect of the background radiation. By improving of the traditional method including atmospheric attenuation a new operating range calculation model of the GIITS was established based on two requirements. One is that the image size of observed target should meet the requirement of the processor signal extraction. The number of the pixel occupied by target image should be more than 9. The other is that the signal noise ratio (SNR) of the GIITS should not be less than 5 to meet the requirements of the target detection probability and spatial frequency. The SNR calculation equation in form of energy is deduced and the radiation characteristic of the observed target and background are analyzed. When evaluate the operating range of the GIITS using the new method the performance of GIITS and feature of target and background. This paper firstly makes analysis and summarization on the definite localizations of the traditional operating range equation of the GIITS. The localizations are mainly in two aspects. On one hand we should successively calculate two operating range values according to two requirements mentioned above and choose the minimum value as the analytic result. In the end the dispersion of the image and the effect of image dispersion are not considered in the traditional method an evaluation of operating range for fighter aircraft is accomplished as an example. The influence factors in every aspect on operating range were explored by the calculated result. The new operating range calculation model provides the theoretical basis for the design and applications as well as the comprehensive evaluation of a GIITS. 2011 Copyright Society of Photo-Optical Instrumentation Engineers (SPIE).

Low temperature and low toxicity synthesis of highly luminescent CdSe/CdS core-shell nanocrystals in a two-phase system 期刊论文 OAI收割
crystengcomm, 2011, 卷号: 13, 期号: 16, 页码: 5243-5249
Ma XB; Nie W; Pan DC; Ji XL; Wang C; Zhang WJ

收藏 | 浏览/下载：28/0 | 提交时间：2012/06/11

CDS NANOCRYSTALS CORE/SHELL NANOCRYSTALS QUANTUM DOTS SEMICONDUCTOR NANOCRYSTALS SIZE DISPERSION NANOPARTICLES PARTICLES CLUSTER GROWTH PHOTOACTIVATION

The role of silver species on Ag/Al2O3 catalysts for the selective catalytic oxidation of ammonia to nitrogen 期刊论文 OAI收割
JOURNAL OF CATALYSIS, 2009, 卷号: 261, 期号: 1, 页码: 101-109
作者: Zhang, Li; Zhang, Changbin; He, Hong

收藏 | 浏览/下载：21/0 | 提交时间：2015/08/07

Selective catalytic oxidation NH3 Ag State Dispersion Particle size

Oxide coatings on Y(3)Al(5)O(12): Tb(3+) particles 期刊论文 OAI收割
JOURNAL OF LUMINESCENCE, 2008, 卷号: 128, 期号: 11, 页码: 1803-1808
作者: Li, Xiu-Juan; Liu, Zhong-Shi; Zeng, Zheng-Zhi; Jing, Xi-Ping

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收藏 | 浏览/下载：20/0 | 提交时间：2019/04/09

Coating y(3)Al(5)o(12): Tb(3+) Phosphor Particle Size Dispersion

Design of dual-FOV refractive/diffractive LWIR optical system (EI CONFERENCE) 会议论文 OAI收割
3rd International Symposium on Advanced Optical Manufacturing and Testing Technologies, AOMATT 2007: Advanced Optical Manufacturing Technologies, July 8, 2007 - July 12, 2007, Chengdu, China
作者: Wang L.-J.; Zhang J.-P.; Wang L.-J.; Zhang X.; Zhang X.

收藏 | 浏览/下载：32/0 | 提交时间：2013/03/25

An infrared-optical zoom system using binary element is proposed in this paper. The two main advantages of the zoom system introducing here are: bigger F-number and lower cost. The primary optical properties are: F/#=1 Second Others zoom ratio =1:4 binary element is used to correct the chromatical aberration by taking the advantage of negative dispersion characteristics and the cost of the system is lower than that of conventional ones with Zinc Selenide (Znse) material at the same level. In the binary element is rotational symmetric with one step which is easy to fabricate in order to balance 5th spherical aberration and dual field are 26.6 and 5.6respectively. Wider field of view is used for search and the smaller one is used for imaging details. This system uses un-cooled infrared detector with 320240 pixels and 45m pixel size. The F-number matches the sensitivity range of the detector array. Three aspects are considered during design process to make the system more satisfactory and more achievable. First 5th coma aberration and 5th astigmatic aberration the manner of zoom is accomplished by exchanging tow lenses into the smaller field of view system layout. The lens exchange manner faces the requirement of simple system structure and good image quality in both focal points. It can also make the system more feasible in the alignment process than mechanical-zooming manner and optical-zooming manner high-order asphere surfaces with 2th order to 10 th order are also hired in the system. Asphere surface is useful in compressing the system and improving optical system transmittance. This kind asphere surface is on industrial level featuring low cost and easy to fabricate. It is shown that good image quality can achieved by implementing five Germanium lenses and the transmittance of system is 72%. All aberrations are diffraction-limited both spherical aberration and astigmatic aberration are corrected. When the field of view(FOV) is 26.6 and the focal length is 152mm MTF at Nyquist frequency(11lp/mm) is great than 0.7. The spherical aberration is -0.0073. The coma aberration is 0.0978 and the astigmatic aberration is -0.013. When the field of view(FOV) is 5.6 and the focal length is 38mm MTF at Nyquist frequency is great than 0.8 with spherical aberration -0.0046 the coma aberration 0.055 and astigmatic aberration 0.034.