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	Long-Term Dynamics of Sandy Vegetation and Land in North China 期刊论文 OAI收割 REMOTE SENSING, 2023, 卷号: 15, 期号: 19, 页码: 4803 作者: Wang, Zhaosheng \| 收藏 \| 浏览/下载：19/0 \| 提交时间：2023/11/06 sandy land large-scale remote sensing monitoring classification of sand position stability North China
	Diversity of vegetation composition enhances ecosystem stability along elevational gradients in the Taihang Mountains, China 期刊论文 OAI收割 ECOLOGICAL INDICATORS, 2019, 卷号: 104, 页码: 594-603 作者: Geng, Shoubao; Shi, Peili; Song, Minghua; Zong, Ning; Zu, Jiaxing \| 收藏 \| 浏览/下载：71/0 \| 提交时间：2019/09/24 Ecosystem stability Climate anomaly Diversity of vegetation composition Diversity-stability hypothesis Large spatial scale The Taihang Mountains
	Diversity of vegetation composition enhances ecosystem stability along elevational gradients in the Taihang Mountains, China 期刊论文 OAI收割 ECOLOGICAL INDICATORS, 2019, 卷号: 104, 页码: 594-603 作者: Geng, Shoubao; Shi, Peili; Song, Minghua; Zong, Ning; Zu, Jiaxing \| 收藏 \| 浏览/下载：20/0 \| 提交时间：2019/09/24 Ecosystem stability Climate anomaly Diversity of vegetation composition Diversity-stability hypothesis Large spatial scale The Taihang Mountains
	Diversity of vegetation composition enhances ecosystem stability along elevational gradients in the Taihang Mountains, China 期刊论文 OAI收割 ECOLOGICAL INDICATORS, 2019, 卷号: 104, 页码: 594-603 作者: Geng, Shoubao; Shi, Peili; Song, Minghua; Zong, Ning; Zu, Jiaxing \| 收藏 \| 浏览/下载：11/0 \| 提交时间：2019/09/24 Ecosystem stability Climate anomaly Diversity of vegetation composition Diversity-stability hypothesis Large spatial scale The Taihang Mountains
	Deep-seated large-scale toppling failure in metamorphic rocks: a case study of the Erguxi slope in southwest China 期刊论文 OAI收割 Journal of Mountain Science, 2016, 卷号: 13, 期号: 12, 页码: 2094-2110 作者: LIU Ming; LIU Fang-zhou; HUANG Run-qiu; PEI Xiang-jun 收藏 \| 浏览/下载：263/0 \| 提交时间：2016/11/30 Deep-seated slope deformation Large-scale toppling Slope stability Metamorphic rock
	Large-scale stabilization control of input-constrained quadrotor 期刊论文 OAI收割 International Journal of Advanced Robotic Systems, 2016, 卷号: 13, 期号: 5, 页码: 1-10 作者: Jiang J(姜军); Yang LY(杨丽英); Gu F(谷丰); He YQ(何玉庆); Han JD(韩建达) 收藏 \| 浏览/下载：25/0 \| 提交时间：2016/11/14 Quadrotor control input constraint large-scale stability control-Lyapunov function
	Manufacture of 1.2m reaction bonded silicon carbide mirror blank CFID (EI CONFERENCE) 会议论文 OAI收割 5th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Large Mirrors and Telescopes, April 26, 2010 - April 29, 2010, Dalian, China 作者: Zhang G.; Zhang G.; Zhang G. 收藏 \| 浏览/下载：30/0 \| 提交时间：2013/03/25 Silicon carbide (SiC) is a new type candidate material for large-scale lightweight space mirror. Its low thermal distortion high stiffness fine optical quality and dimensional stability make SiC an ideal material for large space born telescope. Since ten years Changchun institute optics fine mechanics and physics (CIOMP) has developed reaction bonded SiC (RB-SiC) technology for space application and can fabricate RB-SiC mirror with scale less than 1.0 meter for telescope. The green body is prepared with gel-casting method which is an attractive new ceramic forming process for making high-quality complex-shaped ceramic parts. And then unmolding drying binder burning out reacting bonded the RB-SiC can be obtained. But with the development of space-born or ground telescope the scale of primary mirror has exceeded 1.0 meter. So CIOMP has developed an assembly technique which called novel reaction-formed joint technology for larger RB-SiC mirror blank. The steps include joining of green bodies with mixture comprised of SiC particles and phenolic resin etc firing machining and sintering. Joining the 1.2 meter RB-SiC mirror blank by the novel reaction-formed joint technology. And testing the welding layer's performance the results show that the thickness of 54-77m the microstructure and thermal property can be comparable to the substrate and the mechanical property are excellent in bending strength of 307MPa. 2010 Copyright SPIE - The International Society for Optical Engineering.
	Fabrication technique of large-scale lightweight SiC space mirror (EI CONFERENCE) 会议论文 OAI收割 3rd International Symposium on Advanced Optical Manufacturing and Testing Technologies, AOMATT 2007: Large Mirrors and Telescopes, July 8, 2007 - July 12, 2007, Chengdu, China 作者: Zhang G.; Zhang G.; Zhang G. 收藏 \| 浏览/下载：20/0 \| 提交时间：2013/03/25 Silicon carbide (SiC) is a new type candidate material for large-scale lightweight space mirror. Its low thermal distortion high stiffness high optical quality and its dimensional stability are better than other traditional optical substrate materials such as ULE Zerodure Beryllium (Be) and so on. In this paper the lightweight silicon carbide space mirror blank was fabricated by reaction sintering. As a space born mirror material silicon carbide must be an optical grade ceramic. So we prepared the silicon carbide green body with gel-casting method. Then some carbon materials were supplemented into the green body which will bring reaction-sintering with silicon in a vacuum furnace during 1500-1600C ultimately the reaction bonded silicon carbide was made. The diameter of SiC space mirror blank we have made is 680mm. If expanding the size of the vacuum furnace bigger mirror blank can be obtained. The test results show that the mechanical and thermal properties of RB-SiC are excellent with bending strength of 350MPa fracture toughness of 4.1 MPa·m1/2 and coefficient of thermal expansion(CET) of 2.6710-6/K. The surface roughness(RMS) could be better than 3nm.
	若干流体力学问题的数学性质研究学位论文 OAI收割博士后, 北京: 中国科学院力学研究所, 2002 作者: 李明军收藏 \| 浏览/下载：1550/105 \| 提交时间：2009/04/13 湍流大小尺度（LSS）方程组相似的相互作用结构抛物化稳定性方程组变步长摄动有限差分格式 large-small scale (LSS) equations of turbulence the similar structure the parabolized stability equations (PSE) non-uniform scale perturbation finite difference scheme