Lab Windows/CVI在电能质量检测中的应用

主要介绍了电能对电力系统的影响和谐波参数的计算方法，其中包括应用快速傅立叶变换求取基波和谐波的幅值、相位，利用相关方法求取信号的相位差等，最后介绍了虚拟电能分析仪的系统设计，包括硬件接口电路设计及虚拟仪器用户界面设计。     

Effects of test media on different EFL test-takers in writing scores and in the cognitive writing process

The effects of computer and paper test media on EFL test-takers with different computer familiarity in writing scores and in the cognitive writing process have been comprehensively explored from the learners’ aspect as well as on the basis of related theories and practice. The results indicate significant differences in test scores among the test-takers who are less familiar with computers, showing that the computer test medium has greatly impacted this group of test-takers’ writing scores. From the perspective of the cognitive process, they are not significantly different in such stages as ‘goal-setting’, ‘generating ideas’ and ‘reviewing’, while their ‘organising ideas’ and ‘translating’ stages were greatly different, owing mainly to the nature of the test medium itself.     

一体化电子式电流电压互感器研究

A high-performance current and voltage measurement system has been developed in power system.The system is composed of two parts:one current measurement element and one voltage measurement element.A Rogowski coil and a capacitive voltage divider are used respectively for the line current and voltage measurements.Active electronic components are used to modulate signal,and power supply for these components is drawn from power line via an auxiliary current transformer,Measurement signal is transmitted y optical fibers,which is resistant to electromagnetic induction and noise,With careful design and the use of digital signal processing technology,the whole system can meet 0.5% accuracy for metering and provides large dynamic range coupled with good accuracy for protective relaying use.     

情境·渗透·体验——师范院校德育柔性化管理的实践探索

德育柔性化管理作为德育改革的崭新成果，注重现代师表形象的塑造，提倡青年学生的自我实践强调三位一体的德育合力构建。德育柔性化管理是在研究人的心理和行为规律基础上，依据共同的价值观和文化精神氛围而实施的人性化德育管理，旨在学生个人需要满足与学校和谐秩序之间建立一种平衡机制，将组织意志变为个人的自觉行动。     

生活就是学习

算来,我从事远程教育工作已超过十年,从当初的高速、高品质电视画面的多点同步教学,到如今的网际网络上的异步学习,学习者的主导性增加许多。即使没有老师,学习者只要动机够强肯努力,他还是能从网络上获得许多学习资源和协助的。     

基于泄漏约束的DF-GSC语音增强

为了改善广义旁瓣抵消(GSC)语音增强方法的性能,提出了一种带有泄漏约束的判决反馈旁瓣抵消(LCDF-GSC)方法.采用DF-GSC方法以解决GSC对波达方向敏感的问题,在代价函数中引入泄漏因子,以此改善语音失真的问题,而这种问题是由于噪声参考信号中含有语音成份造成的.试验结果表明,尽管经过LCDF-GSC处理后的语音信号信噪比要略低于DF-GSC,IS测度表明这时前者的语音信号失真度要小于后者.MOS分也表明LCDF-GSC方法要优于DF-GSC和单通道Weiner滤波算法.     

鲫鱼肌肉细胞核糖体酸性蛋白的分离与纯化

本文报导了一种分离纯化鲫鱼肌肉细胞核糖体酸性蛋白质的方法,并测得其亚基分子量约为12.400道尔顿。为今后的序列测定提供了基础。     

例说巧用童谣教英语

童谣是一种符合儿童年龄特点的说唱形式。在小学英语教学中利用生动有趣、琅琅上口的童谣辅助教学,能够有效地优化课堂教学效果,增强学生的语用能力,培养和发展孩子们的创造性学习能力。     

基于技术地图的产业重点集群预测研究*--以福建省软件产业为例

收集了2001-2013年福建省软件产业的专利信息,构建集群预测模型。运用线性回归、因子分析、主成分分析的方法分析了产业集群中技术与市场之间的关系,并根据分析结果形成技术地图。结果表明:福建省软件产业集群中各项技术之间相互影响,最终在技术上形成以数字通信为主,视像通信、电话通信为辅,产品功能上信息内容处理与信息传输处理并重的产业发展趋势。