Researchers at Tsinghua University introduced a new concept called ϵ-controllability and its testing method for datatic control (i.e., data-driven control) systems, overcoming the challenge of controllability test for datatic systems caused by spatial discontinuity of their system description.

A new study presents a breakthrough in energy storage by introducing vanadium doping to lithium-rich layered oxides. This modification significantly enhances oxygen redox reversibility, improving voltage stability and boosting initial Coulombic efficiency to 91.6%. The vanadium-doped material addresses key issues in lithium-ion batteries, such as low efficiency and rapid voltage decay, making it a promising solution for next-generation battery technologies. These advancements offer a clear pathway for overcoming existing challenges in high-energy storage systems, particularly in applications like electric vehicles and renewable energy storage.

An advanced aqueous battery design incorporating photothermal technology enables rapid self-heating, making it well-suited for low-temperature environments. The battery uses photothermal current collectors to convert sunlight into heat, which is efficiently distributed throughout the system by high-conductivity suspension electrodes. This design mitigates common cold-climate challenges such as electrolyte freezing and slow ion transfer, ensuring stable performance in sub-zero conditions.

Due to the absence of structural defects such as grain boundaries and dislocations in bulk metallic glasses (BMGs), they exhibit outstanding mechanical properties. However, this also poses challenges for their machining. Although numerous studies have explored the impact of cutting parameters on their machining characteristics, there is a scarcity of research that investigates the influence of tool corner radius on cutting characteristics through examining chip geometrical characteristics. It is essential to fill this research gap.

In this work, advanced dense boron-containing α/β-Si₃N₄/Si monoliths were prepared by high pressure-high temperature technique using polymer-derived amorphous SiBN powders as raw materials. The following scientific issues were mainly studied:

（1）The crystallization behavior and phase transformation of the polymer-derived amorphous samples were studied in the temperature range from 1400 ^oC to 1800 ^oC. The results demonstrate that the incorporation of boron in the Si₃N₄ matrix suppresses phase transformation from α-Si₃N₄ to β-Si₃N₄.

（2）The mechanical properties of the as-prepared samples were measured and the maximum hardness and fracture toughness of boron-rich SiBN samples reaches up to 14.8 GPa and 7.96 MPa·m^1/2, respectively. The hardness of the obtained boron-rich SiBN samples is stable at 300 ^oC.

（3）The oxidation behavior of the samples prepared at 1400 ^oC and 1600 ^oC was investigated at 1400 ^oC for 50 h. The results show that the incorporation of boron significantly improves the oxidation resistance of the samples due to the formation of borosilicate/cristobalite.

Nervonic acid (NA) is an important long-chain monounsaturated fatty acid found in the nervous tissue of mammals. It has recently garnered research attention due to its therapeutic potential in treating psychiatric and neurodegenerative disorders in a paper published in hLife, a team from Qingdao Institute of Bioenergy and Bioprocess Technology (QIBEBT), the Chinese Academy of Sciences and China Academy of Chinese Medical Sciences present evidence that NA is a promising candidate for drug therapy in addressing stroke and associated post-stroke depression (PSD)-like behaviors.