能实现垂直缠绕攀爬的蛇形机器人

垂直缠绕攀爬的蛇形机器人是基于模块化的P_R(pitch_roll)关节,以串行总线舵机作为关节驱动装置,其控制系统采用协调级和执行级配合的二级结构,以空间三连杆组成的蠕动爬行作为基本步态,实现了蛇形机器人具有垂直缠绕攀爬的功能。     

Twenty years of research on total quality management in Higher Education: A systematic literature review

Faced with intensified global education competition, universities and other Higher Education institutions are implementing Total Quality Management (TQM) to keep rivals at bay. Meanwhile, research interest in TQM in Higher Education is growing. This paper reviews the achievements and limitations of extant research on TQM in Higher Education, and discusses directions for future research. The paper finds that extant research focuses on (1) teaching and learning but neglects research and industry engagement; (2) an isolated factor (e.g., teacher) but neglects other factors (e.g., facilities); (3) the Higher Education sector in advanced countries but neglects the Higher Education sector in developing countries; and (4) TQM as a phenomenon but neglects theory development and integration. Future research needs to address these limitations, adopt a more holistic perspective, and take a more inclusive and comprehensive approach to TQM in the Higher Education sector.     

欧洲阅读联盟(EURead)推广阅读活动与启示

[目的/意义]欧洲阅读联盟是欧洲社会力量开展阅读活动的母平台，联盟成员所开展的阅读活动既有差异，也有共性，社会影响力大。通过对欧洲阅读联盟成员所办阅读活动及其规律的分析，可为我国公共图书馆主导与开展阅读活动提供借鉴。[方法/过程]概述欧洲阅读联盟，对其成员类型进行解析，并对每一成员的阅读项目进行共性分析，凝练出阅读活动的经验及规律。[结果/结论]我国应建立多级阅读推广力量，建立政府购买阅读服务长效机制，开放图书馆的阅读活动空间，提升阅读活动频率，开发多样化、差异化的阅读活动。     

二次曲线拟合算法的统计性能分析与改进

传统的二次曲线拟合使用标准特征值分析算法。通过统计分析技术 ,可知该技术在拟合数字二次曲线时 ,存在估计偏差大、均方误差大的缺点。其产生原因是数据噪声的有色性和自相关函数矩阵的条件数过大 ,因此白化数据噪声和正则化变换是提高曲线拟合的有效措施。这从理论上有力地支持了Hartley提出的正则化算法。通过理论分析和计算机仿真实验 ,表明了降维EVD技术固有地同时具备噪声预白化功能和数据正则化功能 ,因此它能给出均方误差相当小的无偏估计。由于它无须进行预白化变换或正则化变换 ,并把最优化过程的维数从 6降为 2 ,所以它还具有计算快速、实现简单方便的优点。