Dual hydration of oceanic lithosphere

<正>Water is crucial to processes of both Earth’s surface and interior, facilitating plate tectonics and making the Earth a habitable planet [1]. Seawater penetrates into oceanic lithosphere through fractures on seafloor and migrates along faults and pores. The hydration process weakens the crustal strength and alters mantle properties. Specifically, it influences seismicity by changing the pressure and friction of rocks, and triggers magma generation by lowering the mantle solidus and mant...     

MAGUS: machine learning and graph theory assisted universal structure searcherOA

Crystal structure predictions based on first-principles calculations have gained great success in materials science and solid state physics.However,the remaining challenges still limit their applications in systems with a large number of atoms,especially the complexity of conformational space and the cost of local optimizations for big systems.Here,we introduce a crystal structure prediction method,MAGUS,based on the evolutionary algorithm,which addresses the above challenges with machine learni...     

运动对Sarcopenia细胞凋亡信号通路的影响

Sarcopenia（肌肉衰减征）是在老年人群中发生率较高的一种增龄性机能退化现象,与老年人跌倒、骨折乃至残疾密切相关。大量研究表明,细胞凋亡在Sarcopenia发生中具有重要作用,尤其线粒体所介导的内在细胞凋亡信号通路更是发挥着至关重要的作用。运动作为一种应激会对骨骼肌细胞凋亡过程中的基因调控产生影响。综述了Sarcopenia相关的线粒体介导的内在细胞凋亡信号通路及运动对其的影响。     

＂Painting of Farming and Weaving＂： a Panoramic Portrayal of the Agricultural Society of Ancient China

Ancient China was an agricultural society where all capable emperors paid much attention to farming and ,weaving activities, Artistic creations depicting farming and weaving scenes can date back to the Neolithic Age. A bronze bottle from the Warring States period （475 BC - 221 BC） features hunting and planting scenes. Bronze wares of the pre-Qin period, painted relief bricks of the Han Dynasty, tomb murals of the Wei-and-Jin period and grotto paintings of the Tang and Song dynasties, all recorded farming, planting and weaving scenes of the agricultural society of ancient China. In the Southern Song Dynasty, in particular, thanks to its highly developed agriculture, a painter named Lou Shu created a piece of ink painting, entitled ＂Farming and Weaving Painting＂, reviewing agricultural skills and approaches of previous dynasties.     

登第联拾趣

通过科举考试做官、食取俸禄,几乎是封建时代读书人的惟一出路。自然登第中举后,当事人与相关人员就有很强烈的反应,这些不同情绪在对联中有一定的记录。明朝某年科考后,几个考中的试子结伴还乡,归途中兴致勃勃地凑成一联:     

一种测试不同温度下非饱和土土-水特征曲线的试验装置

研究目的：研制一种试验装置,以实现对非饱和土土-水特征曲线温度效应的有效测试。创新要点：1．研制了一种温控非饱和土三轴试验装置,包括加载系统、吸力控制系统和温度控制系统;2．利用研制的温控非饱和土三轴试验装置,对不同温度（25,40和60℃）以及不同应力（40100和200kPa）条件下的非饱和土土-水特征曲线进行了试验测定。研究方法：1．总结分析已有的温控三轴仪所采用的加热方式的优缺点,提出环向加热压力室内水体的方法;2．基于GDS非饱和土三轴仪,研制可实现温度控制功能的温控非饱和土三轴仪（图1、2）;3．开展不同温度及不同应力条件下非饱和土土水特征曲线的试验研究。重要结论：1．所研制的温控非饱和土三轴仪的实用效果得到验证;2．温度的升高将引起非饱和土持水性能的降低。     

Sands modeling constrained by high-resolution seismic data

In the phase of field evaluation, the changing of interwell reservoir may be out of control if the geological model was built only on well data due to few existing wells. The uncertainty of the interwell reservoir interpolation based only on well data can be decreased by comprehensive utilization of geological, logging and seismic data, especially by using highly relative seismic properties from 3D seismic data adjusted by well point data to restrict interpolation of geological properties. A 3D-geological model which takes the sand body as the direct modeling object was built through stacking the structure, reservoir and water/oil/gas properties together in 3D space.