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Zhijun Guo, Yiqing Qiu, Xianghai Yan, Jiajia Wang, Shengjie Si, Fugui Guo and Fu Zhang
We explore the mechanism and law of reducing the resistance of soil cutting tools by achieving the self-excited vibration mode through the modification of the soil-engaging surface spectrum. Around the fundamental resonance point of the soil, and superim...
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Alessio Nicosia, Francesco Giuseppe Carollo and Vito Ferro
Flow resistance in gravel-bed channels is not only affected by the shape and size of the roughness elements, but also by their arrangement on the channel bed surface (position to flow streamlines, spacing between elements, and their protrusion from the c...
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Zhenhua Ren, Hui Wang, Lizheng Fang, Peng Ding and Xiantao Zeng
Stainless steel has the characteristics of oxidation resistance, high temperature resistance, corrosion resistance, high strength, and high yield ratio. The use of stainless steel bars can extend the life of a structure, reduce later maintenance costs, a...
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Cunfei Ma, Xianxu Fang, Xiaonan Ma, Xiantai Liu, Bingkun Xu and Xinmin Ge
By combining thermal simulation experiments with core data, thin sections, scanning electron microscopy (SEM), source rock, and high-pressure mercury and gas adsorption analysis, this paper evaluates the properties and models of shale reservoirs in the u...
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Baojie Xu, Hualei Zhang, Jiadi Yin and Yonglin Xue
Although permeation grouting technology has been widely used in engineering practice, there has not been sufficient research on how the distribution of pore sizes in porous media affects the diffusion of grout. In this study, based on the fractal theory ...
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Zhengbing Chen, Jianyin Zhou and Qianhai Chen
The roughness coefficient is a comprehensive parameter reflecting river resistance, which is widely used in the planning and design of river regulation and flood control projects. In recent years, as the upstream water conservancy and hydro-power project...
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D. D. L. Chung
This is the first review of conductive electrets (unpoled carbons and metals), which provide a new avenue for low-power electronics. The electret provides low DC voltage (µV) while allowing low DC current (µA) to pass through. Ohm?s Law is obeyed. The vo...
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Shiyi Zhang, Yingfang Fan and Surendra P. Shah
To improve the ability of concrete structures to resist freeze-thaw damage in cold environments, explore the effect and mechanism of nano-metakaolin (NMK) on frost resistance of concrete. And make up for the deficiencies in the mechanical properties and ...
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Yan Chen, Liyuan Chen and Wuli Chu
According to the discontinuous structural characteristics of a gas turbine, by considering the contact thermal resistance of the rough surface, a contact thermal resistance measurement experiment was conducted in this study. The main objectives of this w...
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An Zhu, Haiping Ai and Li Chen
In order to prevent joints from being damaged by impact force in a space robot capturing satellite, a spring-damper device (SDD) is added between the joint motor and manipulator. The device can not only absorb and attrition impact energy, but also limit ...
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