期刊文献+
共找到5篇文章
< 1 >
每页显示 20 50 100
Impacts of artificial dams on terrestrial water storage changes and the Earth's elastic load response during 1950-2016: A case study of medium and large reservoirs in Chinese mainland
1
作者 linsong wang Mingtao Zhu +2 位作者 Yulong Zhong Jianwei Sun Zhenran Peng 《Geodesy and Geodynamics》 EI CSCD 2024年第3期252-263,共12页
The construction of dams for intercepting and storing water has altered surface water distributions, landsea water exchanges, and the load response of the solid Earth. The lack of accurate estimation of reservoir prop... The construction of dams for intercepting and storing water has altered surface water distributions, landsea water exchanges, and the load response of the solid Earth. The lack of accurate estimation of reservoir properties through the land surface and hydrological models can lead to water storage simulation and extraction errors. This impact is particularly evident in many artificial reservoirs in China. The study aims to comprehensively assess the spatiotemporal distribution and trends of water storage in medium and large reservoirs(MLRs) in Chinese mainland during 1950-2016, and to investigate the gravity,displacement, and strain effects induced by the reservoir mass concentration using the load elasticity theory. In addition, the impoundment contributions of MLRs to the relative sea level changes were assessed using a sea-level equation. The results show impoundment increases in the MLRs during1950-2016, particularly in the Yangtze River(Changjiang) and southern basins, causing significant elastic load effects in the surrounding areas of the reservoirs and increasing the relative sea level in China's offshore. However, long-term groundwater estimation trends are overestimated and underestimated in the Yangtze River and southwestern basins, respectively, due to the neglect of the MLRs impacts or the uncertainty of the hydrological model's output(e.g., soil moisture, etc.). The construction of MLRs may reduce the water mass input from land to the ocean, thus slowing global sea level rise. The results of the impact of human activities on the regional water cycle provide important references and data support for improving the integration of hydrological models, evaluating Earth's viscoelastic responses under longterm reservoir storage, enhancing in-situ and satellite geodetic measurements, and identifying the main factors driving sea level changes. 展开更多
关键词 Man-made dams Terrestrial water storage Elastic load response Sea level changes Chinese mainland
下载PDF
The activity and kinetic properties of cellulases in substrates containing metal ions and acid radicals 被引量:2
2
作者 Ge wang Xiaowen Zhang +3 位作者 Li wang Keke wang Fanglin Peng linsong wang 《Advances in Biological Chemistry》 2012年第4期390-395,共6页
The effects of various metal ions (Na+, K+, Ca2+, Mg2+, Al3+, Co2+) and anions (Cl–, SO2-4 and CH3COO–) on two cellulases were investigated. Fitting of the data to Michaelis-Menten kinetics showed that Al3+ noncom-p... The effects of various metal ions (Na+, K+, Ca2+, Mg2+, Al3+, Co2+) and anions (Cl–, SO2-4 and CH3COO–) on two cellulases were investigated. Fitting of the data to Michaelis-Menten kinetics showed that Al3+ noncom-petitively inhibited cellulase (Km = 22.68 g/L;Vmax = 0.269 mg/min at 5.0 mmol/L AlCl3) and Mg2+ competitively inhibited cellulase (Km = 50.0 g/L;Vmax = 0.434 mg/min at 10.0 mmol/L MgCl2) Different metal ions increased or decreased inhibition of cellulase activity slightly below 1 mmol/L and strongly over 10 mmol/L. The results indicated that filter paper activeity (FPA) was suitable for analysis of enzymatic saccharification with various lignocellulosic substrates whereas crude cellulase was suitable for applications in the biomass industry. Some metal ions were proved to inhibit cellulase reversibly. 展开更多
关键词 CELLULASE ENZYME Activity ENZYME DEACTIVATION Kinetics Parameters Metal Ions ANIONS
下载PDF
DRM范式错误记忆的通道效应
3
作者 毛伟宾 王林松 《心理学进展》 2011年第2期77-82,共6页
Deese-Roediger-McDermott(DRM)范式错误记忆通道效应的研究发轫于对错误记忆产生机制的研究。1998年,Smith和Hunt首次研究并提出了DRM范式的错误记忆通道效应问题,即在视觉测验条件下,听觉学习转为视觉学习后会导致更低的错误再认或错... Deese-Roediger-McDermott(DRM)范式错误记忆通道效应的研究发轫于对错误记忆产生机制的研究。1998年,Smith和Hunt首次研究并提出了DRM范式的错误记忆通道效应问题,即在视觉测验条件下,听觉学习转为视觉学习后会导致更低的错误再认或错误回忆,从此引发了一系列关于错误记忆通道效应的实证研究。研究者从编码与提取两个角度阐释了DRM范式错误记忆通道效应的产生机制,并分析了年龄、编码方式和注意水平等因素在错误记忆通道效应中的作用。最后指出未来研究可以从其他研究范式以及脑生理机制的角度去进一步探讨错误记忆的通道效应。 展开更多
关键词 错误记忆 DRM范式 通道效应 视觉通道 听觉通道
下载PDF
Harnessing perennial and indeterminant growth habits for ratoon cotton(Gossypium spp.)cropping
4
作者 Xin Zhang Xiangjun Kong +4 位作者 Ruiyang Zhou Zhiyong Zhang Jinbao Zhang linsong wang Qinglian wang 《Ecosystem Health and Sustainability》 SCIE 2020年第1期354-366,353,共14页
Ratoon is the stub or root of a perennial plant that is commonly retained after harvest to produce a following crop.This paper presents a review of ratoon cotton in relation to a broader framework that has been examin... Ratoon is the stub or root of a perennial plant that is commonly retained after harvest to produce a following crop.This paper presents a review of ratoon cotton in relation to a broader framework that has been examining perennialization of agriculture for the benefit of ecology and economy.Cotton is botanically indeterminate,but has been treated as an annual after domestication,yet the habit of perenniality is retained and the plants begin to resprout after the first harvest.In some cropping systems,this tendency is exploited using the“ratooning”practice(i.e.growing one or more crops on the rootstock of the first).Ratooning has declined for various reasons such as an increase in the prevalence of pests and diseases and overwintering risk.However,ratooning has many benefits such as no annual tillage before sowing,a well-established root system,and high yield.The three methods of ratooning offer flexibility to balance the environmental and economic benefits in agriculture.The greatest environmental benefits arise from perennial ratoon cropping of semi-wild cotton,and the greatest economic benefit is obtained from biannually cropping modern annual cultivars.However,an optimum solution would be provided by perennial cropping annual cultivars.To realize both environmental and economic benefits,research is needed in the following main areas:preventing the buildup of pests and diseases,breeding the most suitable cotton cultivars for ratooning,and developing light and simplified cultivation(LSC)systems for ratoon cultivation. 展开更多
关键词 COTTON PERENNIAL indeterminant RATOON stub TROPICS
原文传递
On multivariable Zassenhaus formula
5
作者 linsong wang Yun GAO Naihuan JING 《Frontiers of Mathematics in China》 SCIE CSCD 2019年第2期421-433,共13页
We give a recursive algorithm to compute the multivariable Zassenhaus formula e^X1+X2+…+Xn=e^X1eX2…e^Xn∏∞k=2e^Wk and derive an effective recursion formula of Wk.
关键词 Baker-Campbell-Hausdorff FORMULA Zassenhaus FORMULA
原文传递
上一页 1 下一页 到第
使用帮助 返回顶部