国家预印本平台

针对现有能见度仪测量误差显著、环境扰动敏感、校准方法复杂的问题，设计了一种轻量化、低成本且集成校准一体式与窗口污染在线监测功能的高精度前向散射式能见度仪。该仪器同步采集风速、降水量、相对湿度和温度等气象参数，通过多元线性回归模型动态补偿反演能见度值。室外长期实验结果表明，该样机与Vaisala?PWD50能见度仪15 min相对误差在10~2 000 m、2 000~10 000 m和10 000~25 000 m区间分别小于±5%、±10%和±15%，环境补偿后整体误差降低约32%，决定系数（R2）由0.977 8提升至0.990 1。验证了该能见度仪在多变气象条件下具有良好的稳定性和测量精度，能够满足自动气象站、海上平台及交通安全监测等场景的高精度应用需求。

慕课平台既是海量教学数据和课程的网络载体，也是AI辅助教学功能落地的最佳试验场和集中表现平台。在教育部提出"101计划"，课程-课程群-学科知识图谱和大语言模型应用于教学以来，以此为核心的慕课平台发展日新月异。本文对国内外具有代表性的7个慕课平台的AI辅助教学功能进行了梳理与对比，归纳为AI智能体、AI课程、AI工具箱、AI学情管理4个核心功能，分别总结了其应用模式；最后分析了AI在教学应用中教育管理层、教师、学生以及慕课平台研发企业四个主体所面临的问题和未来发展趋势。本文旨在为教育工作者和平台研发人员提供关于人工智能赋能教学平台的设计与应用参考。

团队智力是团队成员通过协作、沟通与知识共享，共同应对复杂任务或解决问题的团队水平一般认知能力；其本质在于超越个体局限，实现群体层面的认知协同与效能提升。然而，当前该领域研究仍面临概念与测量双重挑战：概念上，多学科视角并存导致概念界定不一，共享心智模型、交互记忆系统与互动团队认知等理论缺乏整合框架；测量方法上，评估型范式擅整体效能衡量却弱于机制揭示，诊断型范式强于过程解析但生态效度不足。本研究系统梳理团队智力的概念演进，阐释其形成机制的主要理论模型，并对比评估型与诊断型测量范式。在此基础上，提出未来应推动测量范式整合、构建多模态动态评估体系，并加强人智协同团队研究，以拓展团队智力的理论边界与应用前景。

Isochronous mass spectrometry (IMS) conducted with a heavy-ion storage ring has been proven to be a powerful tool for precision mass measurements of short-lived nuclei in the past decades. However, the achieved mass precision in the IMS experiments strongly depends on the efficiency of the detector. This leads to a poorer mass resolving power for light nuclei with smaller proton numbers. To overcome this limitation, we developed a dual-microchannel plate (MCP) time-of-flight (TOF) detector capable of collecting secondary electrons (SEs) emitted in both forward and backward directions when ions pass through a thin carbon foil. Meanwhile, the time resolution was improved by increasing the electric field strength E, in which the homogeneity was also optimized through varying the potential of equalizing ring. From offline tests with an α-source, a total detection efficiency of 94% and a best time resolution of 29.62 ± 0.80 ps at E = 300 V/mm were achieved. These results show a substantial efficiency gain for light ions and meet the stringent timing performance required for Bρ-defined IMS at HIAF-SRing.

The reaction mechanisms of weakly bound projectiles remain a central challenge in nuclear reactions. In this study, the production cross sections of 128,126I, 127,126Te, 126,125,124gSb, and 125,123mSn from the 7Li + 124Sn system were analyzed using the statistical model codes PACE4 and EMPIRE-3.2.3 with Generalized Superfluid, Enhanced Generalized Superfluid, and Hartree–Fock level densities. A comparison with experimental data shows contributions from both complete and incomplete fusion. For the xn channels, EMPIRE predictions with the Generalized Superfluid Model showed the closest agreement with the measured values, while pxn and αxn channels exceeded theoretical estimates, indicating the dominant role of incomplete fusion in Te and Sb production. Neutron transfer processes are also significant in the formation of 125,123mSn, with yields within a factor of 1–1.5 of EM-HF predictions. The isomeric cross-section ratios of 125m,gSn are sensitive to the spins of the populated states. These findings highlight the combined roles of complete fusion, incomplete fusion, and transfer processes, emphasizing the need for models incorporating breakup-fusion dynamics.