5篇
您的检索式：作者名="Jinxun Liu"
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| 1 | Atomistic theory of ostwald ripening and disintegration of supported metal particles under reaction conditions 显示文摘 | Ouyang Runhai Liu Jinxun Li Weixue | 2013 | J Am Chem Soc2013，135，5： | 1 |
| 2 | The calculation of relative permeability from displacement experiments by pore scale network model,fluid flow and transport in porous media显示文摘 | Liu Qingjie Wang Jinxun | 2001 | Mathematical and Numerical Treatment Contemporary Mathematics2001，295，： | 1 |
| 3 | Nitrogen controls on ecosystem carbon sequestration: A model implemen- tation and application to Saskatchewan, Canada显示文摘 | LIU Jinxun PRICE D T CHEN Jing M | 2005 | Ecological Modelling2005，186，2： | 1 |
| 4 | Active forest management accelerates carbon storage in plantation forests in Lishui,southern China显示文摘Background:China has committed to achieving peak CO_(2)emissions before 2030 and carbon neutrality before 2060;therefore,accelerated efforts are needed to better understand carbon accounting in industry and energy fields as well as terrestrial ecosystems.The carbon sink capacity of plantation forests contributes to the mitigation of climate change.Plantation forests throughout the world are intensively managed,and there is an urgent need to evaluate the effects of such management on long-term carbon dynamics.Methods:We assessed the carbon cycling patterns of ecosystems characterized by three typical plantation species(Chinese fir(Cunninghamia lanceolata(Lamb.)Hook.),oak(Cyclobalanopsis glauca(Thunb.)Oerst.),and pine(Pinus massoniana Lamb.))in Lishui,southern China,by using an integrated biosphere simulator(IBIS)tuned with localized parameters.Then,we used the state-and-transition simulation model(STSM)to study the effects of active forest management(AFM)on carbon storage by combining forest disturbance history and carbon cycle regimes.Results:1)The carbon stock of the oak plantation was lower at an early age(<50 years)but higher at an advanced age(>50 years)than that of the Chinese fir and pine plantations.2)The carbon densities of the pine and Chinese fir plantations peaked at 70 years(223.36 Mg⋅ha^(‒1))and 64 years(232.04 Mg⋅ha^(‒1)),respectively,while the carbon density in the oak plantation continued increasing(>100 years).3)From 1989 to 2019,the total carbon pools of the three plantation ecosystems followed an upward trend(an annual increase of 0.16–0.22 Tg C),with the largest proportional increase in the aboveground biomass carbon pool.4)AFM increased the recovery of carbon storage after 1996 and 2009 in the pine and Chinese fir plantations,respectively,but did not result in higher growth in the oak plantation.5)The proposed harvest planning is reasonable and conducive to maximizing the carbon sequestration capacity of the forest.Conclusions:This study provides an example of a carbon cycle coupling model that is potentially suitable for simulating China's plantation forest ecosystems and supporting carbon accounting to monitor peak CO_(2)emissions and reach carbon neutrality. | Jiaojiao Diao Jinxun Liu Zhiliang Zhu Xinyuan Wei Mingshi Li | 2022 | Forest Ecosystems2022，9，1： | 1 |
| 5 | Dynamic evolution in mechanical characteristics of complex supporting structures during large section tunnel construction显示文摘The shallow tunnelling method(STM)often uses temporary supports to divide large section tunnels into several closed or semiclosed sections so as to share the upper load.The complex support system composed of primary and temporary supports can ensure safety during tunnel construction.Based on the large section tunnel of Beijing Subway Line 12,the mechanical characteristics of support system by the double-side-drift method(DSDM)during excavation and demolition were analyzed through numerical simulation and monitoring.The study showed that the middle cave excavation was the most critical stage of the DSDM,during which the load on the supporting structure increased significantly.The temporary vertical support bore most of the new load during middle cave excavation.During the demolition stage,the load was redistributed,which caused arch settlement and section convergence.The removal of the temporary vertical support exerted the greatest impact in this process.The lateral temporary inverted arch changed from axial compression to axial tension after the middle and lower caves were excavated.Based on the mechanical characteristics of the support system,some engineering suggestions were proposed for large section tunnel construction.These research results can provide reference for the design and construction of similar large section tunnels. | Hua Jiang Jianhua Mu Jinxun Zhang Yusheng Jiang Chongyang Liu Xiaoyan Zhang | 2022 | Deep Underground Science and Engineering2022，1，2： | 0 |
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