Groundwater is one of the important components in the hydrological cycle of the basin. Its dynamic change is of great value for understanding the hydrological regulation mechanism, the cycle of material elements and ecosystem service function of terrestrial ecosystem. Covered with subtropical monsoon evergreen broad-leaved forest and its transitional vegetation types, Dinghushan National Nature Reserve has been well protected since the 1950s. Dinghushan Forest Ecosystem Research Station set up four groundwater level observation wells downstream of the complete catchment area of Dinghushan Nature Reserve according to the observation specifications and quality control requirements of terrestrial ecosystem water environment, so as to carry out long-term standardized positioning observation of the depth of groundwater level. This dataset collates the long-term monitoring data of four groundwater level observation wells from 2002 to 2020. It is aimed to provide basic data support for the study of groundwater response process, the evaluation of hydrological service function of forest ecosystem and the sustainable management of forest resources under the background of global climate change.
In recent years, it has been a hot spot to use flow control technology to generate control capability similar to mechanical rudder. Taking the flying wing configuration as the research object, based on CFD and low speed wind tunnel test, the circulation control of airfoil and wing based on Coanda effect is studied, and the parameter influence law and control effect are given. The results show that: when the rear edge of the wing is opened with the corresponding slot, the control capability of the upper-surface blowing is similar to that of the mechanical rudder; the control capacity of pitch and roll is increased with the decreasing of jet height and the increasing of air pressure ratio, the pitching and rolling capacity increases first and then decreases; the control effect of circular Coanda surface is better than elliptical Coanda surface; the pitching and rolling control effect of the optimized circulation-control scheme in Ma=0.2 is not lower than that of the mechanical rudder, the corresponding flow flux is about 0.05~0.07 kg/s.
The organisation of a cell’s interior, the cytoskeleton and organelles, is fundamental for every cell’s functionality. However, unlike most differentiated cells, our knowledge about the contribution of the sub-cellular architecture to embryonic development and pluripotency remains scarce. Using advanced live imaging, we discovered polarised non-centrosomal microtubules as central player for the pluripotent state of the in vivo early mammalian embryo and induced pluripotent stem cells (iPSCs). Each cell contains an apical pole highly enriched with CAMSAP3-nucleated microtubules, growing in a longitudinal direction towards the base of PSCs. These non-centrosomal microtubules initiate an asymmetry of metabolites and organelles, including mitochondria. We further establish their rearrangement upon differentiation in a germ layer-specific manner. Dissecting how intrinsic cellular regulation contributes to pluripotency will lead a revolutionary era of regenerative and reproductive medicine.
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