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Yan Gong, Xinghua Xie and Jingkai Liu
As a new type of unconventional natural gas resource, shale gas plays a vital role in energy supply. In order to deeply understand the shale fracture seepage characteristics, filled and unfilled fracture seepage tests were carried out on shale samples wi...
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Suliman Alshammari, Abdullh Jabr, Saad Jaddua and Abdulhakim Alabadusalam
A compact microwave ECR ion source with low operating power was tested and commissioned for the ion injector line in the multipurpose low-energy ELASR storage ring facility at King Abdulaziz City for Science and Technology (KACST) in Riyadh. The compact ...
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Junhong Qian, Xiaoyan Wu, Hewei Liu, Xiubao Hua, Ye Tao and Rongzhu Zhang
In order to further explore the technical difficulties involved in orienting the sparse-aperture imaging system towards practical applications, this paper proposes an optical?mechanical structure design scheme and performance simulation, as well as actua...
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Alessandra Budillon and Gilda Schirinzi
Structural health monitoring and damage detection tools are extremely important topics nowadays with the civil infrastructure aging and deteriorating problems observed in urban areas. These tasks can be done by visual inspection and by using traditional ...
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T. Xu, Y. Lu, G. He and X. Yang
Advanced applications require transmit-array lenses featuring low profiles, covering 360° phase modulation, and, potentially, polarization conversion. Subwavelength metamaterial elements with multilayers manipulate electromagnetic waves with predesigned ...
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Soo-Jin Kang, Sung-Woo Park, Hye-Yoon Choi, Gu-Hyun Ryu, Jong-Pil Kim, Sung-Hoon Jung, Se-Young Kim, Hyon-Ik Lee and Hyun-Ung Oh
This paper presents the effectiveness of the thermo-mechanical design of a high-speed digital receiver unit (HSDRU) developed for spaceborne synthetic aperture radar applications. The main features of HSDRU?s thermo-mechanical design include the thermal ...
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Seong-Cheol Kwon, Ji-Hae Son, Sung-Chan Song, Jin-Han Park, Kyung-Rae Koo and Hyun-Ung Oh
The Small SAR Technology Experimental Project (S-STEP) mission aims to develop a new (space-based 80 kg-class active X-band synthetic aperture radar (SAR)) satellite with a main imaging mode of 1 m resolution stripmap. In the S-STEP mission, to achieve t...
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Hongwei Deng, Guanglin Tian, Songtao Yu, Zhen Jiang, Zhiming Zhong and Yanan Zhang
Micro-pore structure has a decisive effect on the physical and mechanical properties of porous materials. To further improve the composition of rock-like materials, the internal relationship between microscopic characteristics (porosity, pore size distri...
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Yang Wang, Zhiyuan Gu, Xiangyue Meng, Lei Zhang and Yuegang Fu
Combining the requirements of spectrometers for unmanned aerial vehicle platforms, a miniaturized airborne wide-angle push-broom imaging spectrometer with an Offner configuration is designed. The system comprises an objective lens and an Offner-type spec...
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Zhen Liu, Pang-Wei Liu, Elias Massoud, Tom G Farr, Paul Lundgren and James S. Famiglietti
The San Joaquin Valley and Tulare basins in California?s Central Valley have intensive agricultural activity and groundwater demand that has caused significant subsidence and depletion of water resources in the past. We measured groundwater pumping-induc...
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