一种可重复使用的腿式着陆缓冲装置

本发明涉及一种可重复使用的腿式着陆缓冲装置，足垫与支腿主支柱通过球铰连接头相连，球铰与足垫之间设有金属橡胶块；内、外套筒之间设有单向阻尼器和长弹簧，单向阻尼器在压缩过程没有阻尼，拉伸过程有阻尼，长弹簧压缩可以将冲击动能储存，达到最大压缩量之后单向阻尼器工作，弹簧缓慢恢复原长使得着陆腿姿态恢复；载荷箱通过CR型钢丝绳减震器与上、下框架连接，通过GS型钢丝绳减震器与外筒连接，外筒通过可调阻尼器和短弹簧与内筒连接。本发明形成多重隔冲机制，提高了隔冲效率，并且可以重复使用，适用于地球、月球、火星以及小行星等行星的着陆及探测活动中

用于生命之树重建的数据集

由中国科学院计算机网络信息中心、中国科学院植物研究所、深圳市中国科学院仙湖植物园"三方两地"共同合作研究建设的"达尔文树"——分子数据分析应用环境(DarwinTree——Molecular Data Analysis and Application Environment),从中国陆地植物发育系统框架的研究出发,逐步推动解决生命之树构建过程中存在的技术难题,探索利用基因和基因组信息构建生命之树的策略和方法,研究和开发DNA序列信息自动采集和生命之树自动生成技术(Automatic Reconstruction of The Tree of Life),建立生命之树信息平台及其利用体系,为最终在我国建立具有国际影响的,能很好地兼容物种分类、地理分布、形态性状、化石信息以及DNA信息的物种库(Species Bank)创造条件。DarwinTree旨在为科研人员提供数据和分析并举的工作平台,该平台将承担数据汇集和面向实际科研工作应用的双重作用。本文发布的数据集包括:(1)DarwinTree基础数据集:来自国际公共序列数据的标记处理得到的分子标记数据及其与任意阶元物种分类名称对应的统计数据集;(2)DarwinTree自测序数据集:面向中国陆地植物研究的补充测序序列数据;(3)DarwinTree中国维管植物进化数据集:已构建的中国维管植物属系统发育树的数据(Generic tree of Chinese vascular plants)

Prediction of Energy Resolution in the JUNO Experiment

International audienceThis paper presents the energy resolution study in the JUNO experiment, incorporating the latest knowledge acquired during the detector construction phase. The determination of neutrino mass ordering in JUNO requires an exceptional energy resolution better than 3% at 1 MeV. To achieve this ambitious goal, significant efforts have been undertaken in the design and production of the key components of the JUNO detector. Various factors affecting the detection of inverse beta decay signals have an impact on the energy resolution, extending beyond the statistical fluctuations of the detected number of photons, such as the properties of liquid scintillator, performance of photomultiplier tubes, and the energy reconstruction algorithm. To account for these effects, a full JUNO simulation and reconstruction approach is employed. This enables the modeling of all relevant effects and the evaluation of associated inputs to accurately estimate the energy resolution. The study reveals an energy resolution of 2.95% at 1 MeV. Furthermore, the study assesses the contribution of major effects to the overall energy resolution budget. This analysis serves as a reference for interpreting future measurements of energy resolution during JUNO data taking. Moreover, it provides a guideline in comprehending the energy resolution characteristics of liquid scintillator-based detectors