中国科学院机构知识库网格系统: 检索

The stability analysis of weak structural planes based on multi-frequency ultrasonic imaging characteristics during rock and soil physical model tests 期刊论文 OAI收割
ENVIRONMENTAL EARTH SCIENCES, 2021, 卷号: 80, 期号: 23, 页码: 12
作者: Zou, Xianjian; Chen, Bingrui; Song, Huan; Ma, Zhimin; Chen, Shuangyuan

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收藏 | 浏览/下载：82/0 | 提交时间：2022/01/05

Ultrasonic imaging Weak structural plane Stability analysis Morphological characteristics Physical model test

Numerical Investigation of a Hydrosplitting Fracture and Weak Plane Interaction Using Discrete Element Modeling 期刊论文 OAI收割
WATER, 2020, 卷号: 12, 期号: 2, 页码: 23
作者: Liu, Shuaiqi; Ma, Fengshan; Zhao, Haijun; Guo, Jie; Duan, Xueliang

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收藏 | 浏览/下载：40/0 | 提交时间：2020/05/18

bonded-particle model (BPM) fluid-mechanical coupling weak plane in situ stress ratio maximum principal stress

Research on the collapse pressure of an elliptical wellbore considering the effect of weak planes 期刊论文 OAI收割
ENERGY SOURCES PART A-RECOVERY UTILIZATION AND ENVIRONMENTAL EFFECTS, 2019, 页码: 1-17
作者: Chen, Yulin; Liu, Zhou; Zhang, Xu; He, Shiming; Ma, Dexin

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收藏 | 浏览/下载：40/0 | 提交时间：2019/10/17

Elliptical wellbore weak plane collapse pressure wellbore stability drilling

Research on the collapse pressure of an elliptical wellbore considering the effect of weak planes 期刊论文 OAI收割
ENERGY SOURCES PART A-RECOVERY UTILIZATION AND ENVIRONMENTAL EFFECTS, 2019, 期号: -, 页码: 43847
作者: Chen, Yulin; Liu, Zhou; Zhang, Xu; He, Shiming; Ma, Dexin

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收藏 | 浏览/下载：30/0 | 提交时间：2020/04/08

Elliptical wellbore weak plane collapse pressure wellbore stability drilling

The Plane Wave Methods Combined with Local Spectral Finite Elements for the Wave Propagation in Anisotropic Media 期刊论文 OAI收割
ADVANCES IN APPLIED MATHEMATICS AND MECHANICS, 2018, 卷号: 10, 期号: 5, 页码: 1126-1157
作者: Yuan, Long; Hu, Qiya

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收藏 | 浏览/下载：30/0 | 提交时间：2019/03/05

Electromagnetic wave plane wave least-squares ultra weak variational formulation anisotropic media plane-wave basis error estimates

Numerical modeling of rockburst near fault zones in deep tunnels 期刊论文 OAI收割
TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY, 2018, 卷号: 80, 期号: -, 页码: 164-180
作者: Manouchehrian, Amin; Cai, Ming

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收藏 | 浏览/下载：13/0 | 提交时间：2020/04/08

Numerical simulation Tunnel Weak plane Loading system stiffness Rockburst Case study

Influence of weak planes on rockburst occurrence 会议论文 OAI收割
McGill Univ, Montreal, CANADA, AUG 13-19, 2016
作者: Manouchehrian, Amin; Cai, Ming

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收藏 | 浏览/下载：30/0 | 提交时间：2018/06/05

Numerical simulation excavation heterogeneity weak plane rockburst

Experimental Investigation of the Mechanical Behavior of Bedded Rocks and Its Implication for High Sidewall Caverns 期刊论文 OAI收割
ROCK MECHANICS AND ROCK ENGINEERING, 2016, 卷号: 49, 期号: 9, 页码: 3643-3669
作者: Xu, Ding-Ping; Zhou, Yang-Yi; Feng, Xia-Ting; Fan, Qi-Xiang

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收藏 | 浏览/下载：23/0 | 提交时间：2018/06/05

Bedded rock Anisotropy Weak plane Tensile strain Confining pressure unloading test Cyclic test True triaxial test Wudongde underground caverns Bedding plane

Advanced astigmatism-corrected tandem Wadsworth mounting for small-scale spectral broadband imaging spectrometer (EI CONFERENCE) 会议论文 OAI收割
作者: Lin G.-Y.

收藏 | 浏览/下载：35/0 | 提交时间：2013/03/25

Tandem gratings of double-dispersion mount make it possible to design an imaging spectrometer for the weak light observation with high spatial resolution high spectral resolution and high optical transmission efficiency. The traditional tandem Wadsworth mounting is originally designed to match the coaxial telescope and large-scale imaging spectrometer. When it is used to connect the off-axis telescope such as off-axis parabolic mirror it presents lower imaging quality than to connect the coaxial telescope. It may also introduce interference among the detector and the optical elements as it is applied to the short focal length and small-scale spectrometer in a close volume by satellite. An advanced tandem Wadsworth mounting has been investigated to deal with the situation. The Wadsworth astigmatism-corrected mounting condition for which is expressed as the distance between the second concave grating and the imaging plane is calculated. Then the optimum arrangement for the first plane grating and the second concave grating which make the anterior Wadsworth condition fulfilling each wavelength is analyzed by the geometric and first order differential calculation. These two arrangements comprise the advanced Wadsworth mounting condition. The spectral resolution has also been calculated by these conditions. An example designed by the optimum theory proves that the advanced tandem Wadsworth mounting performs excellently in spectral broadband. 2012 Optical Society of America.

Study on spectrograph for ionosphere: A broadband imaging instrument prototype for far-ultraviolet (EI CONFERENCE) 会议论文 OAI收割
International Symposium on Photoelectronic Detection and Imaging 2011: Space Exploration Technologies and Applications, May 24, 2011 - May 26, 2011, Beijing, China
作者: Wang S.-R.; Lin G.-Y.; Yu L.

收藏 | 浏览/下载：35/0 | 提交时间：2013/03/25

Current research on space-based exploration for the ionosphere needs more advanced technologies. Because the spectral signals in the ionosphere distributing basically in the far-ultraviolet waveband are very weak. Usual spectrometer structures and detectors such as CCD can't receive enough information. Based on this principle of atmospheric sounding the imaging spectrometer prototype for ionosphere detection application was designed to solve the problem. This prototype consists of the telescope and the imaging spectrometer. The simple structure and small number of mirrors can help higher transmission efficiency be achieved and weak signals detection be implemented. The telescope is an off-axis parabolic mirror and the spectrometer is a modified Czerny-Turner spectral imaging system. Modified Czerny-Turner spectrometer contains a spherical mirror a fixed plane grating and a toroidal mirror. By adjusting the incident angle to the collimating mirror and using toroidal mirror coma and astigmatism were corrected well. We also optimize distances between the grating to the focusing mirror and the focusing mirror to the image plane to improve disadvantages of traditional Czerny-Turner structure. Designed results demonstrate that aberrations are substantially corrected and high image quality can be obtained in broad waveband. The photon counting Wedge-Strip-Anode detector with micro-channel planes as the receiving plane is accepted for the instrument prototype. The other photon counting 2-D detector responding well for weak light such as Cross-Delay line detector and MAMA detector can also be used for detection. The calibration and performances testing system is made of a vacuum system a deuterium lamp a monochrometer and the instrument prototype. Results obtained from the experiment show that the spectral resolution is 2.4 nm and the spatial resolution is 80 m. The other calibration experiments are running. The technology of the spectrometer prototype is important for the research and applications of ionosphere remote sensing. 2011 SPIE.