Purification of Quartz Via Low-Temperature Microwave Chlorinated Calcination Combined with Acid Leaching and its Mechanism

Silicon - As an indispensable raw material for the semiconductor industry, high-purity quartz has great economic and strategic value. Since aluminum (Al) is a common impurity existing in quartz,...     

高动态环境下的傅里叶梅林变换视觉SLAM算法

针对视觉即时定位与地图构建(SLAM)中的静态假设限制其在动态现实环境中应用的问题，提出了一种在高动态环境下基于傅里叶梅林变换的视觉SLAM算法。首先，采用傅里叶梅林算法配准以补偿相机运动，应用帧间差分算法获取运动掩膜。同时利用短时密集连接网络进行语义分割确定潜在运动物体掩膜。结合运动掩膜与物体掩膜，获得最终的物体运动区域，剔除该区域的特征点。最后，依据稳定的静态特征点跟踪优化，提升位姿精度。实验结果表明，本算法的绝对轨迹误差与相对位姿误差相比于ORB-SLAM2减少了95%以上，相比于DS-SLAM减少了30%以上，验证其在复杂动态场景下具有良好的定位精度与鲁棒性，有效降低运动模糊与光照变化对运动检测的影响，同时，克服了传统动态SLAM难以检测非先验运动对象的弊端。     

Single-Crystal Nanowire Cesium Tin Triiodide Perovskite Solar Cell

This work reports for the first time a highly efficient single-crystal cesium tin triiodide (CsSnI₃) perovskite nanowire solar cell. With a perfect lattice structure, low carrier trap density (≈5 × 10¹⁰ cm⁻³), long carrier lifetime (46.7 ns), and excellent carrier mobility (>600 cm² V⁻¹ s⁻¹), single-crystal CsSnI₃ perovskite nanowires enable a very attractive feature for flexible perovskite photovoltaics to power active micro-scale electronic devices. Using CsSnI₃ single-crystal nanowire in conjunction with highly conductive wide bandgap semiconductors as front-surface-field layers, an unprecedented efficiency of 11.7% under AM 1.5G illumination is achieved. This work demonstrates the feasibility of all-inorganic tin-based perovskite solar cells via crystallinity and device-structure improvement for the high-performance, and thus paves the way for the energy supply to flexible wearable devices in the future.     

Enhancing stability and bioavailability of sulforaphene in radish seed extracts using nanoemulsion made with high oleic sunflower oil

Food Science and Biotechnology - The effect of nanoemulsions on the stability and bioavailability of sulforaphene (SFEN) in radish seed extract (RSE) was investigated. Four types of oil were used...     

Synergistic Effects of Phase Transition and Electron-Spin Regulation on the Electrocatalysis Performance of Ternary Nitride

Transition metal nitrides (TMNs) have great potential use in energy storage and conversion owing to tunable electronic and bonding characteristics. Novel iron rich nitrides nanoparticles anchored on the N-doped porous carbon, named as (Co_xFe_1–x)₃N@NPC (0 ≤ x < 0.5) are designed here. The synergistic effects of phase transition and electron-spin regulation on oxygen electrocatalysis are testified. A core–shell structure of (Co_xFe_1–x)₃N with high dispersibility is induced by an intermediate phase transition process, which significantly suppresses coarsening of the metallic nitrides. The Co incorporation regulates d-band electrons spin polarization. The t_2g⁵e_g¹ of Fe^II with the ideal e_g electron filling boosts intrinsic activity. (Co_0.17Fe_0.83)₃N@NPC with optimal cobalt content holds electronic configuration with moderate e_g electron filling (t_2g⁵e_g¹), which balances the adsorption of *O₂ and the hydrogenation of *OH, improving bifunctional catalytic performances. Both liquid and solid-state zinc–air batteries assembled based (Co_0.17Fe_0.83)₃N@NPC cathodes substantially deliver higher peak power density and remarkable energy density.