中国科学院机构知识库网格系统: 检索

Temperature-dependent photoluminescence characterization of compressively strained AlGaInAs quantum wells 期刊论文 OAI收割
Materials Research Bulletin, 2019, 卷号: 115, 页码: 196-200
作者: Y.Song; L.G.Zhang; Y.G.Zeng; Y.Y.Chen; L.Qin

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收藏 | 浏览/下载：30/0 | 提交时间：2020/08/24

Al0.07Ga0.22In0.71As quantum wells,Optical properties,Metal organic,chemical vapor deposition,Photoluminescence,Full width at half maximum,thermal-expansion,carrier localization,gaas,scattering,origin,model,shift,Materials Science

降雨季节分配改变下两共存树种的生理稳态性、化学计量扰动和形态可塑性 学位论文 OAI收割
北京: 中国科学院大学, 2015
作者: 高建国

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收藏 | 浏览/下载：21/0 | 提交时间：2018/12/23

降雨季节分配改变树干液流叶片化学计量学 N : P比气孔控制 As : Al 水力调整恢复力

凝聚-吸附去除饮用水中典型有害阴离子的应用研究 学位论文 OAI收割
博士, 北京: 中国科学院研究生院, 2015
作者: 何赞

收藏 | 浏览/下载：66/0 | 提交时间：2016/07/21

除锑，砷锑竞争吸附，除氟，混凝，吸附，铝氟络合，Sb removal, the competitive adsorption of As and Sb, fluoride removal, coagulation, adsorption, Al-F complexation

Effect of processing parameters on hot deformation behavior and microstructural evolution during hot compression of as-cast Ti60 titanium alloy 期刊论文 OAI收割
Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing, 2014, 卷号: 593, 页码: 16-23
W. W. Peng; W. D. Zeng; Q. J. Wang; Q. Y. Zhao; H. G. Yu

收藏 | 浏览/下载：20/0 | 提交时间：2014/04/18

As-cast Ti60 titanium alloy Flow softening Discontinuous yielding Microstructural evolution working ti-6al-4v temperature map imi-834 imi834

Structure and magnetic properties of (Al, Co) Co-doped ZnO thin films (EI CONFERENCE) 会议论文 OAI收割
2012 International Conference on Materials Science and Nanotechnology, ICMSN 2012, November 16, 2012 - November 18, 2012, Guangzhou, China
Cao P.; Bai Y.

收藏 | 浏览/下载：30/0 | 提交时间：2013/03/25

In this study Zn0.99Co0.01Al0.015O thin film has been prepared by sol-gel method. The structural and magnetic properties of the sample were investigated. X-ray diffraction spectroscopy analyses indicate that the Co and Al codoping can not disturb the structure of ZnO. No additional peaks are observed in the Zn0.99Co0.01Al xO and Al3+ and Co2+ substitute for Zn 2+ without changing the wurtzite structure. The resistance measurements confirm that Al ions increase the free carriers concentration. Based on the above experiments we think the ferromagnetic behavior of the sample could not originate from Co nanoclusters. The presence of free carriers and localized d spins is a prerequisite for the appearance of ferromagnetism. As the result the carriers generated by Al doping is considered a main factor to induce the ferromagnetic phenomenon. (2013) Trans Tech Publications Switzerland.

Characterization of high-temperature deformation behavior of as-cast Ti60 titanium alloy using processing map 期刊论文 OAI收割
Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing, 2013, 卷号: 571, 页码: 116-122
W. W. Peng; W. D. Zeng; Q. J. Wang; H. G. Yu

收藏 | 浏览/下载：37/0 | 提交时间：2013/12/24

As-cast Ti60 titanium alloy Constitutive relationship Processing map Hot deformation behavior hot-working microstructure evolution ti40 alloy ti-6al-4v compression workability hydrogen flow

Experimental study on formability of bulk metallic glass as mold for microstructure replication (EI CONFERENCE) 会议论文 OAI收割
作者: Liu J.; Lin J.; Huang Y.; Liu J.; Liu J.

收藏 | 浏览/下载：51/0 | 提交时间：2013/03/25

La62Al14Cu12Ni12BMG is introduced as a substitute for silicon which was widely used as mold material for nanofabrication. For the purpose of precise microstructure replication and complete filling effects of various imprint parameters including imprint temperature imprint time and compression load on formability of La 62Al14Cu12Ni12BMG are studied and discussed. Scanning electron microscope images and results of thermal analysis are used to characterize the filling effect of La62Al 14Cu12Ni12BMG. In particular correlations between time and thermodynamic properties are presented. Despite of its high viscosity at crystallization temperature and its narrow supercooled liquid region La62Al14Cu12Ni12BMG is proved to be a durable and promising material which can precisely replicate the patterns of silicon mold and then transfer its own patterns on Ce 69Al10Cu20Co1BMG and PMMA. 2012 Elsevier B.V. All rights reserved.

Synthesis, characterization, and luminescent properties of a red-emitting Europium complex (EI CONFERENCE) 会议论文 OAI收割
1st International Conference on Energy and Environmental Protection, ICEEP 2012, June 23, 2012 - June 24, 2012, Hohhot, China
作者: Li B.; Zhang L.; Zhang L.; Li B.; Li B.

收藏 | 浏览/下载：78/0 | 提交时间：2013/03/25

a fluorine functionalized 1 10-phenanthroline ligand 3-ethyl-2-(2- fluorophenyl) imidazo[4 5-f]1 10-phenanthroline(EFPIP) and the corresponding red-emitting Eu(III) complex Eu(DBM)3(EFPIP) (DBM = dibenzoylmethanate) was synthesized and the photophysical properties and electroluminescent(EL) performances were researched. When Eu(DBM) 3(EFPIP) was used as emitting material in organic devices the maximum efficiency and luminance of red emission achieved from the EL device with the configuration of ITO/m-MTDATA (30 nm)/NPB (20 nm)/x wt% Eu(DBM) 3(EFPIP) doped in CBP (30 nm)/Bphen (20 nm)/Alq3 (20 nm)/LiF (0.8 nm)/Al were 3.6 cd/A and 563 cd/m2 respectively. Compared with the previously reported devices based on methyl or chlorine substitute Eu(III) complexes the EL performances of the device using Eu(DBM)3(EFPIP) as an emitter was significantly enhanced due to the introduction of fluorine. (2012) Trans Tech Publications Switzerland.

Control of N/N2 species ratio in NO plasma for p-type doping of ZnO (EI CONFERENCE) 会议论文 OAI收割
作者: Chen X.; Liu L.; Liu L.; Li B.; Li B.

收藏 | 浏览/下载：21/0 | 提交时间：2013/03/25

Nitrogen-doped ZnO thin films were grown on c-plane sapphire (Al 2O3) substrates via plasma-assisted molecular beam epitaxy using plasma activated nitric oxide (NO) as the oxygen source and dopant. X-ray diffraction measurements indicate that a small NO flux benefits the crystal quality of the thin films. Hall effect measurements indicate that the electron density of the ZnO films decreases gradually with decreasing NO flux and the conduction reverses to p-type at a certain flux. Optical emission spectra indicate that the N atom content in the NO plasma increases with decreasing NO flux and the origin of this is discussed. X-ray photoelectron spectroscopy measurements demonstrate that the number of N atom occupied O sites in the ZnO lattice increases correspondingly. 2011 American Institute of Physics.

Multi-focus image fusion algorithm based on adaptive PCNN and wavelet transform (EI CONFERENCE) 会议论文 OAI收割
International Symposium on Photoelectronic Detection and Imaging 2011: Advances in Imaging Detectors and Applications, May 24, 2011 - May 26, 2011, Beijing, China
Wu Z.-G.; Wang M.-J.; Han G.-L.

收藏 | 浏览/下载：77/0 | 提交时间：2013/03/25

Being an efficient method of information fusion image fusion has been used in many fields such as machine vision medical diagnosis military applications and remote sensing.In this paper Pulse Coupled Neural Network (PCNN) is introduced in this research field for its interesting properties in image processing including segmentation target recognition et al. and a novel algorithm based on PCNN and Wavelet Transform for Multi-focus image fusion is proposed. First the two original images are decomposed by wavelet transform. Then based on the PCNN a fusion rule in the Wavelet domain is given. This algorithm uses the wavelet coefficient in each frequency domain as the linking strength so that its value can be chosen adaptively. Wavelet coefficients map to the range of image gray-scale. The output threshold function attenuates to minimum gray over time. Then all pixels of image get the ignition. So the output of PCNN in each iteration time is ignition wavelet coefficients of threshold strength in different time. At this moment the sequences of ignition of wavelet coefficients represent ignition timing of each neuron. The ignition timing of PCNN in each neuron is mapped to corresponding image gray-scale range which is a picture of ignition timing mapping. Then it can judge the targets in the neuron are obvious features or not obvious. The fusion coefficients are decided by the compare-selection operator with the firing time gradient maps and the fusion image is reconstructed by wavelet inverse transform. Furthermore by this algorithm the threshold adjusting constant is estimated by appointed iteration number. Furthermore In order to sufficient reflect order of the firing time the threshold adjusting constant is estimated by appointed iteration number. So after the iteration achieved each of the wavelet coefficient is activated. In order to verify the effectiveness of proposed rules the experiments upon Multi-focus image are done. Moreover comparative results of evaluating fusion quality are listed. The experimental results show that the method can effectively enhance the edge details and improve the spatial resolution of the image. 2011 SPIE.