非稳态雾赋能网络中的在线任务卸载方法

为充分发掘分布在不同位置上的雾节点的计算资源,任务卸载被寄予众望。在雾计算场景下,以尽可能减少任务卸载的长期成本为目标,试图寻找一个高效的在线任务卸载方法。为此,这一问题被建模成一个随机规划问题,该问题中系统参数所对应的随机变量的期望会在未知时刻突变,系统参数相关信息只能在任务完成后的反馈中获得。基于非稳态多臂老虎机模型,提出一个高效的算法来解决这一具有挑战性的随机优化问题,给出理论分析证明该算法的渐进最优性。数值实验证明了该算法的优越性。     

Motivation counteracts fatigue-induced performance decrements in soccer passing performance

Recent theories suggest that negative effects of fatigue on performance are determined by perception of effort and motivation rather than being directly caused by reaching physiological limits. In the current experiment, the influence of motivation on fatigue-induced decrements in soccer performance was experimentally investigated. Sixty amateur soccer players performed a validated soccer-passing test before and after a fatigue protocol. Results showed that players’ motivation and performance decreased after the fatigue protocol for players in the control group. In contrast, players in the motivation group (i.e., with motivation experimentally induced after the fatigue protocol) were able to uphold their motivation and increase their performance. These results indicate that motivation plays a crucial role in performance under fatigue, as fatigue-induced decrements in soccer passing performance can be counteracted by high levels of motivation. Future research may explore the limits of this counteracting effect and extend findings to other relevant performance aspects.     

一种基于聚类的云计算任务调度算法

任务调度是云计算中的一个关键问题.针对 Min-Min 算法负载不平衡的缺点,引入 K-means 聚类,提出一种基于 K-means 聚类和 Min-Min 的云计算任务调度的新算法.该算法采用 K-means 聚类方法依据任务长度对任务聚类进行预处理,然后根据 Min-Min 算法的机制进行任务调度.仿真结果表明,该算法具有较好的负载均衡性和系统性能.     

体育院校高水平运动队成员关系对团队冲突的影响

摘要：近些年来,团队成员关系变化对团队冲突影响越来越多,相关问题也得到了学者们的热切关注。体育团队作为较为特殊的团队形式具有与常规团队区别的差异特征,团队成员关系与团队冲突的关系更加值得深入探讨。本研究目的在于：通过对团队成员关系的阐述,解释成员关系特征对团队冲突的影响,由此找到合理激发任务冲突、控制关系冲突和任务冲突向关系冲突转化的办法,为提升体育团队绩效提供支持。为此,运用文献分析法、问卷调查法、案例分析法等研究方法,以沈阳体育学院板球院队为测量对象,研究了体育院校高水平运动队成员关系对对团队冲突的影响。通过研究,结果表明：1）体育院校高水平运动团队成员关系深刻影响着团队冲突,一般说来,团队成员关系越亲密,团队冲突就越少;2）团队成员工具性关系对团队冲突没有影响;3）团队成员情感关系对冲突具有积极的影响作用,成员关系越亲密,团队冲突就越少;4）关键事件通过影响团队成员关系来深刻影响团队冲突。     

双元、悖论式领导对绩效的影响

组织发展面临的张力越来越普遍,双元领导、悖论式领导日益引起理论界关注。然而双元领导、悖论式领导与创新绩效、任务绩效之间的关系如何?两种领导行为对两种绩效的影响是否存在差异?两种领导行为对创新绩效的影响是否会受到领导者层级的影响?上述问题亟待解答。对50项研究共13 232个样本进行元分析,分析结果发现：双元领导、悖论式领导分别对创新绩效、任务绩效有正向影响;双元领导、悖论式领导对创新绩效、任务绩效的影响不存在显著差异;双元领导、悖论式领导对创新绩效的影响不受领导者层级的调节作用。研究证实了两种相近领导行为影响不存在差异,为未来研究中的变量选择提供了依据,对实践中不同层级领导力开发提供了启示。     

Effects of oncoming target velocities on rapid force production and accuracy of force production intensity and timing

The present study aimed to clarify the effects of oncoming target velocities on the ability of rapid force production and accuracy and variability of simultaneous control of both force production intensity and timing. Twenty male participants (age: 21.0 ± 1.4 years) performed rapid gripping with a handgrip dynamometer to coincide with the arrival of an oncoming target by using a horizontal electronic trackway. The oncoming target velocities were 4, 8, and 12 m · s^?1, which were randomly produced. The grip force required was 30% of the maximal voluntary contraction. Although the peak force (Pf) and rate of force development (RFD) increased with increasing target velocity, the value of the RFD to Pf ratio was constant across the 3 target velocities. The accuracy of both force production intensity and timing decreased at higher target velocities. Moreover, the intrapersonal variability in temporal parameters was lower in the fast target velocity condition, but constant variability in 3 target velocities was observed in force intensity parameters. These results suggest that oncoming target velocity does not intrinsically affect the ability for rapid force production. However, the oncoming target velocity affects accuracy and variability of force production intensity and timing during rapid force production.     

项目课程中的任务模式研究

项目课程与任务驱动式课程既相区别又相联系。按照项目大小、项目真实性、教学顺序等可将项目任务归纳为多种模式。     

网络时代的图书馆内部组织结构也需网络化

随着网络信息资源的不断开发与利用,传统图书馆的组织管理模式已不能满足读者需求,于是,一种新的网络化的组织结构模式开始产生,即在保留图书馆内部原有的职能部门基础上,建立一些跨职能部门的工作任务委员会,以更好地发挥图书馆员的潜力,提高机构总体工作质量和效率。参考文献3。     

素质教育与高校学生工作初探

高校素质教育的关键是提高大学生的自主意识。学生工作在高校全面推进素质教育中有着不可替代的重要作用。高校学生工作为适应素质教育的需要必须提高认识、转变观念、深化改革     

悬置与包容--新闻学视域内的《黄河边的中国》

固有的经验和观念一方面有助于我们观察事物,另一方面也妨碍我们接受新事实.怎样走出这种两难的困扰?本文以为"悬置"理论很值得引入新闻学范畴研究和借鉴.把各种经验和理论工具先"悬置"起来,最大限度地包容各种事实和观念,从而保持客观事实的完整性和原真性,是保证我们的思考能触摸到事实本质的关键,也是纪实风格的新闻所追求的目标.