在体育教学中如何创编与运用体育游戏

体育游戏具有复杂、灵活、多变的特点,在体育教学中运用体育游戏,可培养学生的综合能力,使学生反应敏捷,观察判断准确,想象丰富,能培养学生创造能力,满足其身心发展的需要。本文从教育学和体育学的角度,系统阐述了体育游戏的创编原则、作用和运用方法。对体育教师在教学中如何创编与运用体育游戏、提高教学质量,有一定的指导意义。     

EEG-correlated fMRI of P3b component in P300 waves

Electroencephalography-correlated functional magnetic resonance imaging （EEG/fMRI） can be used to identify blood oxygen level-dependent （BOLD） signal changes associated with both physiological and pathological EEG events. Here, we implemented continuous and simultaneous EEG/fMRI to identify BOLD signal changes related to P3b component of P300, and 64 channels of EEG were recorded in II subjects during Landot Ring task inside a 1.5 T functional magnet resonance （MR） scanner using an MR-compatible EEG recording system. Functional scanning by echoplanar imaging covered almost the entire cerebrum every 2 s, leaving gaps of 2 s without scanning. Off-line MRI artifact subtraction software was applied to obtain continuous EEG data. Additionally, a P300 wave matched filter was constructed to inspect P300 wave occurrence following every target stimulus, target stimuli inspected to induce P300 were detected and their MRI scan number were then used as input for an event-related fMRI analysis. Finally MRI statistical parametric maps were constructed and corrected for multiple comparisons. By random effect group analysis, activations were detected in the right superior parietal lobule and bilaterally in inferior parietal lobule（p〈0.001, uncorrected）. The results demonstrated the upper regions were sources of P3b component and involved in target detection in memory comparison task.     

高职院校体育教学模式研究

高职院校体育教学模式应根据高职院校体育教学特点来构建,依据这一指导思想构建的"尝试-引导-练习-评价"体育教学模式,具有创新性、可行性、操作性、优效性等特点.     

P2P模式探讨与应用研究

随着协同、即时概念及应用的推广,P2P（Peer to Peer）技术日趋成熟,通过这种技术,我们有了解决经典C／S中固有难题的新的途径.本文对这一技术进行了探讨,并针对一个实际项目中的文件更新问题做出了相应的研究,P2P技术可以获得更快的更新速度和服务质量．     

Tachykinins in regulation of gastric motility and secretion

The tachykinins constitute a family of neuropeptides with a common C-terminal amino acid sequence. The best known tachykinin is substance P. Tachykinins are found in the nerve plexuses and nerve fibers in the stomach of all species examined. The circular muscle layer is densely innervated, whereas the longitudinal layer and the mucosa are less intensively innervated. Tachykinins are also found in a significant number of afferent neurons with cell bodies in the dorsal root ganglia. Release of tachykinin can be demonstrated in response to both electrical stimulation of the vagus nerves and application of capsaicin. In the stomach all three known tachykinin receptors seem to be present. Although species variations exist, NK-2 receptors are generally present on the musculature, NK-1 receptors on both neurons and muscles, and NK-3 receptors on neurons only. Tachykinins stimulate motility in all parts of the stomach, but tachykinins also appear to inhibit motility in certain situations. Also, motility initiated centrally, mediated through the vagus nerves, is influenced by tachykinins. The precise role of tachykinin in the various motor programs in the stomach is not clear. Gastric acid secretion is influenced by tachykinins in several species. Tachykinins do not seem to act as neurotransmitters directly on parietal cells, but may have a modulatory function. The importance of tachykinins for the regulation of pepsinogen and hormone secretion from the stomach remains unclear. Received 24 August 1999; received after revision 1 December 1999; accepted 3 December 1999     

苦参与环丙沙星合用对铜绿假单胞菌生物膜的影响

采用体外复制铜绿假单胞菌生物膜模型,研究了苦参水煎液与环丙沙星联合应用对铜绿假单胞菌生物膜的影响及协同杀菌效果,结果显示,1/16、1/4最小抑菌浓度(Minimal Inhibitory Concentration MIC)的苦参水煎液可显著增加1/41、/2 MIC的环丙沙星对铜绿假单胞菌生物膜的抑菌活性,两药合用具有明显的协同作用.     

基于DALI总线的HV9910高亮度LED驱动电路的设计

本文设计了一种基于DALI总线的高效LED照明驱动电路。该驱动电路采用Supertex公司的HV9910通用高亮度LED驱动器,采用飞利浦半导体器件P87LPC760微控器的DALI数字式可寻址照明接口从机单元。实现数字化LED照明系统的驱动和亮度调节,通过DALI接口还可以利用计算机编程、遥控(如利用WLAN、红外遥控等)等方式实现照明效果控制,整个驱动电路设计结构紧凑,可以安装于灯座中。     

基于DirectShow的广域网P2P视频会话系统

介绍了基于COM的DirectShow多媒体应用程序开发技术的基本概念、体系结构和通用实现模式.围绕该技术,介绍了可以在Internet中使用的基于DirectShow的点对点视频会话系统,描述了该系统的功能设计、体系结构和具体实现,阐述了系统实现中的关键技术和难点,包括系统核心数据结构、视频数据包的分割与组装、如何跨越局域网进行数据传输,以及如何维护动态的在线用户列表.该系统在实际使用中效果良好.     

我校大学体育课程的现状及改革构想

针对我校大学体育课程的现状,依据教育部新《纲要》精神,结合当今大学体育教育思想和教学改革方向,提出课程改革的构想:转变课程指导思想;调整课程设置、扩展教学内容;改革教学模式;加强师资建设、改善体育设施。