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| 1 | Improving plasticity of the Zr46Cu46Al8 bulk metallic glass via thermal rejuvenation显示文摘In this paper,effects of cryogenic thermal cycling on deformation behavior and thermal stability of the Zr_(46)Cu_(46)Al_8bulk metallic glass(BMG)were studied.The results show that with the increase of the number of cryogenic thermal cycles(CTC),thermal stability remains almost unchanged,while the plasticity is increased,indicating that the cryogenic thermal cyclic treatment is an effective way to improve plasticity of metallic glasses without distinctly deteriorating thermal stability.Our analysis suggests that the increase in the defect density resulted from the cryogenic thermal treatments are responsible for the plasticity increment.Variation of yield strength can be well interpreted from microstructural percolation which affected by both density and characteristic volume of the defect sites. | Wenli Song Xiaohe Meng Yuan Wu Di Cao Hui Wang Xiongjun Liu Xianzhen Wang Zhaoping Lu | 2018 | Science Bulletin2018，63，13： | 9 |
| 2 | Effects of freezing intensity on soil solution nitrogen and microbial biomass nitrogen in an alpine grassland ecosystem on the Tibetan Plateau,China显示文摘The change of freeze-thaw pattern of the Tibetan Plateau under climate warming is bound to have a profound impact on the soil process of alpine grassland ecosystem;however,the research on the impact of the freeze-thaw action on nitrogen processes of the alpine grassland ecosystem on the Tibetan Plateau has not yet attracted much attention.In this study,the impact of the freezing strength on the soil nitrogen components of alpine grassland on the Tibetan Plateau was studied through laboratory freeze-thaw simulation experiments.The 0–10 cm topsoil was collected from the alpine marsh meadow and alpine meadow in the permafrost region of Beilu River.In the experiment,the soil samples were cultivated at –10°C,–7°C,–5°C,–3°C and –1°C,respectively for three days and then thawed at 2°C for one day.The results showed that after the freeze-thaw process,the soil microbial biomass nitrogen significantly decreased while the dissolved organic nitrogen and inorganic nitrogen significantly increased.When the freezing temperature was below –7°C,there was no significant difference between the content of nitrogen components,which implied a change of each nitrogen component might have a response threshold toward the freezing temperature.As the freeze-thaw process can lead to the risk of nitrogen loss in the alpine grassland ecosystem,more attention should be paid to the response of the soil nitrogen cycle of alpine grasslands on the Tibetan Plateau to the freeze-thaw process. | YANG Zhaoping GAO Jixi YANG Meng SUN Zhizhong | 2016 | Journal of Arid Land2016，8，5： | 5 |
| 3 | In-situ stress, pore pressure and stress-dependent permeability in the Southern Qinshui Basin显示文摘 | Zhaoping Meng Jincai Zhang Rui Wang | 2010 | International Journal of Rock Mechanics and Mining Sciences2010，，1： | 2 |
| 4 | In-situ stress, pore pressure, and stress-dependent permeability in the southern Qinshui basin显示文摘 | MENG Zhaoping ZHANG Jincai WANG R | 2011 | International Journal of Rock Mechanics & Mining Sciences2011，48，： | 1 |
| 5 | In-situ stress, pore pressure, and stress-dependent permeability in the Southern Qinshui Basin显示文摘 | Meng Zhaoping Zhang Jineai Wang Rui | 2011 | International Journal of Rock Mechanics & Mining Sciences2011，，48： | 1 |
| 6 | A geological assessment method of floor water inrush risk and its application显示文摘 | Zhaoping Meng Guoqing Li Xiaotong Xie | 2012 | Engineering Geology2012，，： | 1 |
| 7 | Experimental research on the permeability of high-rank coal under a varying stress and its influencing factors显示文摘 | Zhaoping Meng Guoqing Li | 2013 | Engineering Geology2013，，： | 1 |
| 8 | Preparation and performance analysis of inorganic polymer floeeulant PZFSiC 显示文摘 | Can Li Meng Zhaoping Pan Jienan | 2004 | Journal of China University of Mining and Technology : English Edtion2004，14，2： | 1 |
| 9 | In-situ stress,pore pressure,and stress-dependent permeability in the southern Qinshui Basin显示文摘 | Meng Zhaoping Zhang Jincai Wang Rui | 2011 | International Journal of Rock Mechanics & Mining Sciences2011，48，： | 1 |
| 10 | Experimental research on the permeability of high-rank coal under a varying stress and its influencing factors显示文摘 | Meng Zhaoping Li Guoqing | 2013 | Engineering Geology2013，162，： | 1 |
| 11 | Experimental research on the permeability of high-rank coal under a varying stress and its influencing factors显示文摘 | Zhaoping Meng Guoqing Li | 2013 | Engineering Geology2013，，： | 1 |
| 12 | Laboratory investigation of coal sample permeability under the coupled effect of temperature and stress显示文摘The stress and temperature sensitivities of coal reservoirs are critical geological factors affectingcoalbed methane(CBM)well exploitation;in particular it is important to reduce or eliminate their influence on coal reservoir permeability.To investigate coal permeability behavior at various effective stresses and temperatures,CH4 permeability tests were conducted on raw coal samples under a varying effective stress of 2.0-8.0 MPa under five different temperatures(25℃-65℃)in the laboratory.The results show that the permeability of the coal samples exponentially decreases with increasing effective stress or temperature,which indicates obvious stress and temperature sensitivity.Through a dimension-less treatment of coal permeability,effective stress,and temperature,a new stress sensitivity index S and tempera-ture index ST are proposed to evaluate coal stress and temperature sensitivity evaluation parameters.These new parameters exhibit integrality and uniqueness,and,in combination with stress sensitivity coefficient αk,tempe-rature sensitivity coefficient αT,and the permeability damage rate PDR,the sensitivities of coal permeability to stress and temperature are evaluated.The results indicate that coal sample stress sensitivity decreases with increasing effective stress,while it first decreases and then increases with increasing temperature.Additionally,coal sample temperature sensitivity shows a downward trend when temperature increases and fluctuates when effective stress increases.Finally,a coupled coal permeability model considering the impacts of effective stress and temperature is established,and the main factors affecting coal reservoir permeability and their control mechanism are explored.These results can provide some theoretical guidance for the further development of deep CBM. | Yina YU Zhaoping MENG Jiangjiang LI Yixin LU Caixia GAO | 2022 | Frontiers of Earth Science2022，16，4： | 1 |
| 13 | Influence of sedimentary environments on mechanical properties of classic rocks显示文摘 | MENG Zhaoping ZHANG Jincai | 2006 | Environmental Geology2006，51，： | 1 |
| 14 | In-situ stress,pore pres-sure,and stress-dependent permeability in the Southern QinshuiBasin显示文摘 | Meng Zhaoping Zhang Jincai Wang Rui | 2001 | International Journal of Rock Mechanics&Mining Sci-ences2001，48，： | 1 |
| 15 | Experimental research on the permeability of high-rank coal under varying stress and its influencing factors显示文摘 | Meng Zhaoping Li Guoqing | 2013 | Engineering Geology2013，162，： | 1 |
| 16 | In-situ stress,pore pressure and stress-dependent permeability in the Southern Qinshui Basin显示文摘 | Meng Zhaoping Zhang Jincai Wang Rui | 2011 | International Journal of Rock Mechanics & Mining Sciences2011，48，1： | 1 |
| 17 | Influence of Lithological Characters of Coal Bearing Formation on the Coal Roof Stability显示文摘 | Meng Zhaoping Peng Suping Li Guoqing | 2003 | Journal of China University of Mining & Technology2003，13，1： | 1 |
| 18 | Experimental research on thepermeability of high-rank coal under varying stress and itsinfluencing factors 显示文摘 | MENG Zhaoping LI Guoqing | 2013 | Engineering Geology2013，162，10： | 1 |
| 19 | Experimental research on the permea- bility of high-rank coal under varying stress and its influencing fac- tors显示文摘 | Meng Zhaoping Li Guoqing | 2013 | Engineering Geology2013，162，： | 1 |
| 20 | In-situ stress, pore pressure and stress-dependent permeability in the Southern Qinshui Basin显示文摘 | Zhaoping Meng Jincai Zhang Rui Wang | 2010 | International Journal of Rock Mechanics and Mining Sciences2010，，1： | 1 |
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