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	Increased stress from compound drought and heat events on vegetation 期刊论文 OAI收割 SCIENCE OF THE TOTAL ENVIRONMENT, 2024, 卷号: 949, 页码: 175113 作者: Zhou, Shuang; Wu, Shaohong; Gao, Jiangbo; Liu, Lulu; Li, Delong \| 收藏 \| 浏览/下载：57/0 \| 提交时间：2024/09/19 Vegetation Compound drought and heat events Lag effects Ecosystem types Climate regions Increased stress
	High-density native-range species affects the invasive plant Chromolaena odorata more strongly than species from its invasive range 期刊论文 OAI收割 SCIENTIFIC REPORTS, 2017, 卷号: 7, 期号: x, 页码: - 作者: Zheng, Yulong; Liao, Zhiyong \| 收藏 \| 浏览/下载：55/0 \| 提交时间：2017/12/15 Increased Competitive Ability Nurse Plants Soil Biota Facilitation Communities Evolution Invader Weapons Success Stress
	Effect of thickness on the structural, electrical and optical properties of ZnO films deposited by MBE (EI CONFERENCE) 会议论文 OAI收割 2011 International Conference on Advanced Design and Manufacturing Engineering, ADME 2011, September 16, 2011 - September 18, 2011, Guangzhou, China Yang X.; Su S.; Yi X.; Mei T. 收藏 \| 浏览/下载：76/0 \| 提交时间：2013/03/25 A set of ZnO films of different thickness have been deposited on sapphire substrates using molecular beam epitaxy (MBE) by varying the growth time and the effect of film thickness on the structural electrical and optical properties have been investigated. The X-ray diffraction (XRD) results indicate that the full width at half maximum (FWHM) of the (002) diffraction peak is decreased as the film thickness increasing and the stress along c-axis is stable. Scanning electron microscope (SEM) measurement shows that the grains become more uniform as the film grows thicker and the film surface present distinct hexagon shape as the film is grown up to a thickness of 500nm. The optical absorbance Hall mobility and photoluminescence (PL) intensity are increased in accordance with the thickness of the film. (2011) Trans Tech Publications Switzerland.
	Manufacturing and testing of the line-array fiber-optic image slicer based on silicon V-grooves (EI CONFERENCE) 会议论文 OAI收割 MEMS/MOEMS Technologies and Applications III, November 12, 2007 - November 14, 2007, Beijing, China 作者: Zhu Y. 收藏 \| 浏览/下载：45/0 \| 提交时间：2013/03/25 Linear fiber-optic image slicer is used more and more in spatial exploration and imaging system. In this paper a plane arranging method of fiber-optic array based on Si-V grooves is established in order to improve the accuracy and reduce the cost of manufacturing. Firstly the Si-V groove array is micro-machined with anisotropic etching process then optical fibers are placed in the grooves orderly with plane arranging method. Secondly the end surfaces of the device are polished also the linear fiber-optic image slicer is packaged. Finally some parameters are tested including structure parameters transmittivity and vibration test. Experimental results indicate that the maximum error accumulated in 2000 periods of the Si-V grooves is 0.5 m the error of the height in Si-V grooves is less than 0.15m the roughness of the end surface is less than 0.9nm. The transmittivity of the linear fiber-optic image slicer that without optical film is 51.46% at the wavelength of 632.8nm. After random vibration experiment the ratio of the broken fiber increased by 0.1%. While the temperature reached 320C the stress of epoxy will be 130Mpa which is close to the limit resistance stress of 139Mpa some cracks appeared.
	Material properties test and numerical simulation of impact for die cast magnesium alloy (EI CONFERENCE) 会议论文 OAI收割 International Conference on Magnesium - Science, Technology and Applications, September 20, 2004 - September 24, 2004, Beijing, China Zeng X.; Wu Q.; Liyuan; Fan J. 收藏 \| 浏览/下载：86/0 \| 提交时间：2013/03/25 The poison's ratio of plane plate samples taken from AM60 magnesium alloy was tested in this paper. A number of strain controlled fatigue experiments were also carried out on MTS to investigate the stress-strain behavior under different temperature conditions. The finite element analysis software ANSYS was employed to simulate impact process of shot blasting. Results indicated that at the specific temperature condition the residual stress and plastic strain increased with impact velocity increasing. At the specific impact velocity residual stress reduced and plastic strain increased with temperature increment.