浅谈短跑运动员的放松能力

提高短跑运动员的放松能力,对运动员的技术水平和运动成绩具有重要的作用,通过文献资料的分析研究,指出动作自动化和稳定性,是短跑放松能力提高的关键因素,均衡发展机体各部位的肌肉力量,提高中枢神经系统灵活性,提高肌体的柔韧性等,是提高放松能力的有效方法,在进行短跑专项练习时,只要时刻注意体会,形成自由独特的技术结构,就能充分表现出良好竞技状态.     

监视键盘鼠标动作实现智能关机

监视键盘和鼠标的动作,当其空闲时间达到设定值时,用delphi7.0编程实现Windows2000/XP/2003及以上版本的系统自动关机,以节约用电。     

全站仪测量横断面及横断面数据的自动提取

本文针对传统测量横断面中所面临的工作效率低、工作量大等困难,提出了采用全站仪来进行横断面测量的全新方法,并结合全站仪测量横断面的特点,利用visual basic语言编制了可自动提取断面数据的程序。利用此程序可陕速获取横断面测量成果,极大提高工作效率。     

Efficient video downscaling transcoder from MPEG-2 to H.264

The new H.264 video coding standard achieves significantly higher compression performance than MPEG-2. As the MPEG-2 is popular in digital TV, DVD, etc., bandwidth or memory space can be saved by transcoding those streams into H.264 in these applications. Unfortunately, the huge complexity keeps transcoding from being widely used in practical applications. This paper proposes an efficient transcoding architecture with a smart downscaling decoder and a fast mode decision algorithm. Using the proposed architecture, huge buffering memory space is saved and the transcoding complexity is reduced. Performance of the proposed fast mode decision algorithm is validated by experiments.     

Four and twenty blackbirds: how transcoding ability mediates the relationship between visuospatial working memory and math in a language with inversion

Writing down spoken number words (transcoding) is an ability that is predictive of math performance and related to working memory ability. We analysed these relationships in a large sample of over 25,000 children, from kindergarten to the end of primary school, who solved transcoding items with a computer adaptive system. Furthermore, we investigated the nature of transcoding difficulty of over 300 two- and three-digit numbers. All data come from a Dutch sample, meaning that transcoding is complicated by decade-unit inversion: 24 is pronounced as ‘four-and-twenty’. Omission to invert the digits of a spoken number when writing it down is an inversion error: the incidence of these declined but did not disappear in later elementary school. Furthermore, transcoding ability mediated the relationship between visuospatial working memory and mathematics performance, a strong effect that declined with age. Inversion error making mediated this same relationship in an inverted U-shaped curve, peaking around grade 2 (8 years old). At the item level, structural characteristics related to inversion and irregular pronunciation of units and decades explained a large part of the variance in item difficulty. We conclude that number transcoding is an important ability to develop mathematical proficiency and discuss the implications of these findings.     

锂电池撞击自动检测机构的研究

利用光学原理,电机驱动技术、气动定位技术、机械锁和安全门防护系统测定锂电池经高空重物抛投,撞击电池的检测方法,当重锤从空中跌落到锂电池时,锂电池在受到强烈碰撞下,对电池的性能变化的测试.实验结果显示：高空重物的抛投、加速度、着力点对锂电池性能影响较大.研究表明检测机构对锂电池受到外界冲击力作用下,数据采集,性能分析,准确、真实.     

VB环境下的AutoCAD图形生成技术

介绍了利用VB语言对AutoCAD进行二次开发的特点、原理及方法,并通过实例阐述了基于VB环境下的AutoCAD图形生成技术。利用VB开发AutoCAD具有编程简易、功能强大的特点,能极大地提高设计效率,具有很高的实用价值。     

小便器尿液源头分离及其磷资源回收关键技术的研究

在研发源头尿水自动分离技术的基础上,集成了尿液磷高效回收技术. 评价了延迟时间和如厕尿量对尿水分离影响,以及尿纯度对尿液磷回收影响. 结果表明,随延迟时间增长,收集的尿纯度下降;随如厕尿量增加,尿纯度增加. 在70%~100%尿纯度下,尿液磷回收率大于96%. 可见,研发的基于尿水分离小便器的尿液磷回收技术,在回收尿液磷领域具有广阔的应用前景.     

视频资源管理系统在大学图书馆的设计与应用——以清华大学图书馆为例

视频资源管理系统是一种视频资源发布和管理平台,它直接面向广大用户提供视频资源共享服务和视频资源长期保存服务。清华大学图书馆设计并应用了视频资源管理系统,主要功能模块包括视频资源上传、元数据编目、转码、发布、保存和权限管理等。视频内容包括学生原创作品、名人名师讲座、人文课程以及图书馆原创视频等,采取分角色权限控制,分部门资源管理、特色资源独立呈现、统一保存等方式,应用以来取得良好效果。在设计和应用视频资源管理系统过程中,应对视频类多媒体资源及其元数据有清晰的认识,要充分发挥资源管理系统的优势,有效整合、发布、分享和保存珍贵视频资源。     

LonWorks网络智能节点及应用

本文介绍了LonWorks的技术特点和网络特性。及其在智能抄表系统中的应用，并给出了系统总体方案及智能终端的结构方案。