Science Letters: A current-differential-based method for improving dynamic characteristics of electromagnetic actuators

ontrol method is applied to a real gravure system which verifies the control performance.     

Characterization of a-Si:H/SiN multilayer waveguide polarization using an optical pumping application—LED

This paper describes the fabrication of a waveguide and the analysis of its polarization characteristics by applying light-emitting diode （LED） pumping lights to its surface. By using double tubed coaxial line （DTCL） microwave plasma chemical vapor deposition （MPCVD） equipment, an a-Si：H/SiN multilayer waveguide was fabricated whose thickness could be controlled at nanometer order. The main structural material of the waveguide sample consisted of a combination of layers of amorphous silicon hydrogen and silicon nitrate. Once the sample was ready, another major objective of the experiment was to analyze the polarization characteristics of the fabricated waveguide. The idea of the experiment was to analyze how the waveguide reacts when three types of LED （blue, yellow, and red） are radiated onto its surface. The results showed that the fabrication of the a-Si：H/SiN sample is successful. Most effective transmission results, which accord with the polarization characteristics analysis, were obtained.     

Java中重载和重写的动态绑定研究

从基类和派生类的关系出发,阐述了基类与派生类之间的转换关系,从而引出基类与派生类调用重写和重载方法时的动态绑定问题,结合Java的具体实例对基类与派生类的继承及其对接口的实现,对重载和重写的动态绑定进行详细阐述。     

基于JSP的可视化动态表单引擎设计

长期的实践发现,一般的需求变动都是对表单和相应数据库表的修改。以某中小企业创新平台为基础,提出在应用系统中的可视化Web表单管理的功能,企业维护人员即可通过后台方便地对表单和数据库表进行新建、修改、查找、删除的操作,实现维护方便,成本低以及业务需求响应迅速等特点。     

对VB数组大量数据初始化的方法及注意事项

VB数组在定义时没有提供数据初始化功能,这一点与C语言有较大差异。介绍了利用VB的ARRAY函数对大量数据初始化的处理方法。     

基于优先级的动态分层应用层多播模型

应用层多播(ALM)作为IP多播的替代在互联网中得到广泛的应用。提出一个新的基于优先级的动态分层应用层多播模型CDMP(The Classified Dynamic Model Based on the Priority in Application-Level Multicast),模型通过对不同性质的结点的分层来搭建整个架构,通过分域将性质接近的结点放在一起以保证数据传输的效率和数据共享的公正性,并且减少了结点寻找路由的代价,加快了当结点失败时的路由修复速度。通过分析和仿真实验证明,CDMP协议具有良好的上述性质。     

朝鲜语紧急呼叫号码的语音识别系统研究

朝鲜语是我国目前适用范围较为广泛、使用人12＇较多的一种少数民族语言。朝鲜语紧急呼叫号码的语音识别软件,采用语音命令来呼叫号码,能够准确识别拨叫号码,在特定场合可以起到至关重要的作用。将语音控制指令范围设定为报警求助、火警等词汇的识别中,实现了朝鲜语紧急呼叫号码语音识别系统的软件算法部分。通过对信号处理的每个步骤和朝鲜语数字连读问题进行深入分析及研究,选择DTW（动态时间弯曲）算法作为该软件的核心算法。Matlab实验结果表明,采用的语音识别过程及算法可以准确地对录制的朝鲜语紧急呼叫号码进行识别。     

全球植被碳储量的时空格局动态

植被碳储量对生态系统碳平衡具有重要调节作用,对植被碳储量进行模拟并分析其对气候变化的响应是全球陆地生态系统碳循环和气候变化研究的重要内容.基于全球植被动态模型模拟的全球植被碳储量,分析植被碳储量在1901年-2000年间的时空变化趋势,及其与气温和降水的时空关系.将LPJ-DGVM (Lund-Potsdam-Jena Dynamic Global Vegetation Model)模型对植被碳储量的模拟结果与国际上被广泛接受的其他研究结果进行了对比后得出,该模型对植被碳储量具有较好的模拟能力.对植被碳储量的模拟结果表明:全球过去100年的植被碳储量在整体上呈增加趋势,增加率为0.0016kgC/(m2·a),通过分段线性回归方法得出植被碳储量时间变化趋势存在显著的转折点,20世纪50年代初以前,植被碳储量具有下降趋势,线性斜率为-0.0014kgC/(m2·a),之后植被碳储量呈现显著的增加趋势,增加率为0.0055kgC/(m2·a),是整体增加率的3倍多,因此整体增加率显著低估了近半个世纪以来植被碳储量的实际增加率.在空间栅格尺度上的分析表明,植被碳储量对气候变化的响应具有很大的区域差异,在不同地区,温度和降水的变化对植被碳储量的变化趋势贡献不同,并与各地区植物生长所受的环境条件约束的状况有关.研究结论进一步说明LPJ能够较好的模拟植物生长与气候之间的相关关系、揭示植被碳储量变化规律和特征,另外为了更好地研究气候变化对植被碳储量的影响,下一步需要对LPJ进行改进,增强其对人类活动如土地利用变化和农业灌溉行为等的模拟能力.     

The effects of training on performance and performance-related states in individual elite athletes: A dynamic approach

Abstract

There are difficulties undertaking controlled training studies with elite athletes. Thus, data from non-elite performers are often presented in scientific journals and subsequently used to guide general training principles. This information may not be transferable or specific enough to inform training practices in an individual elite athlete. However, the nature of athletic participation at elite levels provides the opportunity to collect training data, performance-related variables, and performance data of elite athletes over long periods. In this paper, we describe how dynamic linear models provide an opportunity to use these data to inform training. Data from an elite female triathlete collected over a 111-day training period were used to model the relationship between training and self-reported fatigue. The dynamic linear model analysis showed the independent effects of the three modes of triathlon training on fatigue, how these can change across time, and the possible influence of other unmeasured variables. This paper shows the potential for the use of dynamic linear models as an aid to planning training in elite athletes.     

高中体育课动态分层选项教学的有效性与可行性分析

运用文献、问卷调查、专家访谈、教学实践等方法从理论依据、学科特点、教学效果等方面分析论证了实施动态分层选项教学的有效性与可行性。并提出了教学方法、层次划分、课程考核等高中体育课动态分层次教学模式构建的方案及实施策略。