学生乒乓选手如何打好11分制比赛

分析了乒乓球采用11分制后对比赛的影响,提出了学生乒乓球选手如何打好11分制比赛,为乒乓球教学和训练提供一些参考.     

对速度素质敏感期11岁男生身体素质灰色关联分析

运用灰色系统理论中的关联度分析法,对速度素质发展敏感期11岁儿童少年男生的速度素质与力量素质、耐力素质、爆发力素质、灵敏素质和柔韧素质的相互关系进行了系统的分析研究.经分析,身体素质各个代表因素对速度素质的代表指标50 m跑的影响程度大小依次为:行进间30 m跑＞100 m跑＞50 m×8往返跑＞立定跳远＞纵跳摸高＞10 s立卧撑＞抛实心球＞立位体前屈.为提高速度素质提出合理建议.旨在全面提高身体素质同时重点提高速度素质.     

基于ZigBee的智能家居体验中心系统组网方案

根据智能家居的功能特点和发展趋势,结合物联网专业学生对智能家居获取感性认识的需要,提出基于Zig Bee的智能家居体验中心系统(简称智能家居系统)网络组网方案。本方案将ARM技术和Zig Bee无线网络技术相结合,以ARM11处理器S3C6410芯片为核心搭建系统网关控制平台,硬件采用"核心板十扩展板"层次模块化设计,软件开发嵌入式WINCE6.0操作系统;家庭内部局域网利用Zig Bee技术实现,Zig Bee网络节点设备采用TI公司CC2530芯片。本方案通过嵌入式开发技术,实现了对智能家居系统的集中管理和远程控制,体现了智能家居系统智能化、网络化的发展趋势,具有良好的通用性和可扩展性。借助于该系统物联网专业能够完成一系列的教学活动。     

Policy entrepreneurship in the co-evolution of institutions, preferences, and technology: Comparing the diffusion of totally chlorine free pulp bleaching technologies in the US and Sweden

This paper uses the concept of policy entrepreneurship to explain the social processes underlying sustainable technical change in the pulp and paper industry in the 1990s. It presents a detailed case study on the differences in the transition to and diffusion of totally chlorine free (TCF) pulp bleaching methods in Sweden and the USA. This change was sustained in the former, while it was almost absent in the latter. The paper studies the causes for this difference. It looks at the complex coevolution of technology, institutions, and consumer preferences that has taken place in both countries and draws conclusions on how transitions to sustainable paths in production and consumption may be supported by economic and social policy.     

三元能量在针刺临床中应用初探

元极学、针灸学均与传统经络理论有渊源关系，将三元能量应用于针刺临床中，能否提高疗效？实践证明，单用针刺，患者往往只出现一条经脉感传，疗效不太好，而将三元能量应有和于针刺临床中，往往只刺一个疗位，患者可出现数条甚至全身经络感传，疗效大大增加，很快即能痊愈。     

Survivor: The role of innovation in firms’ survival

This paper explores the relationship between innovation and the survival probability of manufacturing firms in the Netherlands, conditional on firm age and size. The empirical analysis combines firm level data on innovation, derived from the second Community Innovation Survey, and on the date of exit, from the Business Register of all firms active in the Netherlands. To estimate the survival probability of a firm we use a non-parametric approach, based on the calculation of Transition Probability Matrices over different time periods. The results show that innovation has a positive and significant effect on the probability of firms’ survival. This effect increases over time and is conditional on firm age and size; we observe that small and young firms are the most exposed to the risk of exit, as found in earlier studies, but also those that most benefit of innovation to survive in the market, especially in the longer term.     

中国松科植物种子油中脂肪酸成分与分布

This paper deals with the constituents of fatty acids from the seed oils of Pinaceae in China, including 30 species belonging to 8 genera.  Discovered are three characteristic fatty acids, i.e. Cis-5,9-octadecadienoic acid, Cis-5,9,12-octadecatrienoic acid and Cis-5, 11, 14-eicosatrienoic acid. Based on the data obtained, the distribution of the three characteristic fatty acids in Pinaceae of China is also discussed.     

浅析室内生态环境

析现代居室空气污染物质的来源、品种及对人体的危害，在此基础上提出治理污染的措施。     

中国远征军第十一集团军在滇西抗战中的重要作用和贡献

中国远征军第十一集团军是我国抗战时期一支功勋卓著的部队。1942年5月中国远征军入缅抗战失利,日军从地面和空中同时向我西南重镇保山发动袭击。危急时刻,第十一集团军受命奔赴前线组织抵抗,并在此后全力承担怒江防线的守卫和滇西大反攻的主要作战任务,前后历时两年零八个月之久,为夺取这场著名反帝爱国战争的胜利,作出了巨大贡献。     

基于单片机的大棚温湿度控制系统设计

针对目前温湿度控制现状,设计了一种大棚温湿度控制系统,给出了系统的硬件电路、软件设计思路.该系统以单片机AT89C52为控制中心,采用SHT71为温湿度检测元件,实时监控温湿度的变化.单片机与智能传感器相连,采集并处理传感器的测量数据;通过LCD12864实时显示温湿度的数值;当温度超出允许范围时,电机开始启动来调节温度,从而实现对整个温湿度控制系统的管理.这种温湿度控制系统具有传感精度高、易于管理等优点.