关于第十六届世界杯各队横、回传球使用情况的研究

对第十六届世界杯足球赛各参赛队使用横、回传情况分析和研究,探索它在对掌握控球权、控制比赛节奏,在进攻时避开对方的紧逼围抢、吸引对方后场防守兵力、破密集防守以及在防守时延缓、瓦解对方攻势、减轻后防压力等方面所起到的作用和所具有的价值。为更好地进攻打下一定的坚实基础,为我国足球的教学训练提供一定的参考依据。     

论排球正面传球的专门化知觉及其培养策略

通过对专门知觉定义的探讨和界定，以逻辑推演的方法推导出排球正面传球的专门化知觉的定义及其组成要素，据此提出排球正面传球专门化知觉的培养策略，以期推动排球教学理论与实践的发展。     

Assessment of internal mammary artery injury after blunt chest trauma: a literature review

The occurrence, bleeding, and treatment of internal mammary artery (IMA) injury after blunt chest trauma have not been well described in the literature. We reviewed articles published from July 1977 to February 2014 describing IMA injury after blunt chest trauma in 49 patients. There was a predominant incidence in males and on the left side. Blunt trauma to the IMA can cause anterior mediastinal hematoma, hemothorax, pseudoaneurysm, arteriovenous fistula, and extra-pleural hematoma. Of the 49 patients studied, 20 underwent embolization, 22 underwent surgical operation, 4 were managed by clinical observation, and 3 had undescribed treatment. Different parts and extents of IMA injury, adjacent vein injury, as well as the integrity of the pleura determined differences in bleeding modality. Prompt diagnosis, complete hemostasis, aggressive resuscitation, and multidisciplinary teams are recommended for patients with IMA injury.     

土地流转：一个农村阶层结构再构过程

从某种意义上讲，地权变革是一个农村各阶层利益的再分配与重组过程，并不断重组着既有的社会阶层结构。近年逐渐兴盛的土地使用权流转作为一项重要的地权变’革实践也正在深刻地重构当前中国农村社会阶层结构：一些农村社会群体（成员较多）借土地流转引发的职业结构变动获得了更多的资源和机会，实现了阶层地位的上向流动；也有些农村社会群体（成员较少）则因先天不足而沦入社会底层，并进一步边缘化；还有一些成员极少的社会群体借制度性的权力和以此织就的社会网络以及区位优势，垄断和控制了更多的社区资源和机会，形成和巩固了其超社区的精英地位。土地流转已经或正在成为农民实现流动的特殊社会阶梯，其重构的农村社会阶层结构亦开始呈现日渐定型化等新的特点和趋势。     

高职院校教师“过三关”培养模式初探

高职院校人才培养目标决定了教师要“过三关”,即教学关、双师关和科研关;分析了教师“过三关”的内涵;提出了青年教师“过三关”的培养模式。     

排球上手传球之我见

本文根据排球上手传球技术动作复杂和教学难度大这一特点，进行正传教学、背传教学、侧传教学的研究。     

用计算机实现二极管包络检波的仿真实验

利用最新电子仿真软件Multisim10进行二极管包络检波虚拟实验,具有组建电路快捷、波形生动直观、实验效果理想等优点。计算机虚拟仿真作为高频电子线路实验的辅助手段,是一种很好的选择,可以加深学生对一些抽象枯燥理论的理解,从而达到提高高频电子线路课程教学质量的目的。     

论歌唱中的共鸣

共鸣在歌唱中按腔体位置可分为头腔共鸣、鼻腔共鸣、口腔共鸣和胸腔共鸣。共鸣与音高、音量、音色的关系密切,各声区中正确运用共鸣,可使音色更加优美。     

Predicting volleyball serve-reception at group level

In a group-serve-reception task, how does serve-reception become effective? We addressed “who” receives/passes the ball, what task-related variables predict action mode selection and whether the action mode selected was associated with reception efficacy. In 182 serve-receptions we tracked the ball and the receivers’ heads with two video-cameras to generate 3D world-coordinates reconstructions. We defined receivers’ reception-areas based on Voronoi diagrams (VD). Our analyses of the data showed that this approach was accurate in describing “who” receives the serve in 95.05% of the times. To predict action mode selection, we used variables related to: serve kinematics, receiver’s movement and on-court positioning, the relation between receiver and his closest partner, and interactions between receiver-ball and receiver-target. Serve’s higher initial velocities together with higher maximum height, as well as smaller longitudinal distances between receiver and target increased the chances for the use of the overhand pass. Conversely, decreasing alignment of the receiver with the ball and the target increased the chances of using the underhand-lateral pass. Finally, the use of the underhand-lateral pass was associated with lower quality receptions. Behavioural variability’s relevance for serve-reception training is discussed.     

开放大学在终身学习立交桥建设中的生态学视角

《纲要》明确提出＂要加快发展继续教育,搭建终身学习立交桥＂的战略任务,这对于开放大学的建设者无疑是一个全新的命题。本文从生态学视角描述了立交桥的架构和多元性特征,明确了开放大学在立交桥建设中的地位与作用,阐述了开放大学在终身学习立交桥建设中适应外部环境选择适宜生态位,抢抓机遇优化内部环境,整合教育资源实现与外部环境联通的建设性观点。