单扫描导数示波极谱法测定地塞米松

提出了测定地塞米松的单扫描二阶导数示波极谱法,在0.10 mol/L HAc-0.10 mol/LNaAc(pH4.7)的缓冲溶液中,地塞米松于-1.14 V处产生一极谱还原波,二阶导数峰电流与其浓度在4.8×10-7~6.0×10-6mol/L范围内有良好的线性关系(r=0.9993,n=8),检测限为1.0×10-7mol/L,应用该方法测定了注射液中地塞米松磷酸钠的含量,结果令人满意.     

2008年北京奥运会我国竞技游泳后备人才的培养对策

从社会学、运动训练学、体育管理学、人才学等视角,针对我国竞技游泳下滑现状和影响发展的因素,以及2008年北京奥运会我国竞技游泳后备力量的培养形式等问题,采用文献资料法、问卷调查法、走访调查法、专家咨询法,比较分析法、数理统计法以及趋势研究法等综合研究方法对我国部分地区(北京、上海、广州、辽宁等)、不同水平的游泳运动员以及他们的教练员、领队进行调查研究,全面分析我国竞技游泳的滑坡原因及存在的问题,旨在延长高水平游泳运动员的运动寿命,提出培养北京奥运会我国竞技游泳后备力量的可行性措施。     

2008-2018���ҹ�����������빫��ͼ��ݹ����о�����

��[Purpose/significance] By analyzing the research status of socialized management of public libraries in China, this paper reveals the research frontiers and development trends in this field, and provides important references for the participation of social forces in the socialized management of public libraries in China.[Method/process] The data of this paper comes from the papers on SocializedManagement of Domestic Public Libraries in CNKI.By using CiteSpace and Endnote software, the annual publication volume, journal publication volume and research hotspots in this field were visualized.[Result/conclusion] Through the research and analysis of the literature in this field, it is concluded that the research hotspots of socialized management of public libraries in China in the future include differentiated development of libraries, innovation of service mode, equalization of grassroots public libraries, and Internet + library.     

新型微带环慢波结构的研究

提出了一种新型微带慢波结构:微带环结构,对其高频特性进行了研究,采用微米量级的结构尺寸,将带宽拓展到毫米波段。通过利用电磁场仿真软件HFSS对该结构进行模拟计算,得到了各个结构参数下慢波电路的色散特性和耦合阻抗,分析了结构参数对其高频特性的影响。对微带环加杆结构的情况也进行了分析。得到对高频特性影响较大的结构参数,能够为器件的进一步研究提供指导参考。     

Factors affecting attitudes and intentions towards knowledge sharing in the Dubai Police Force

This study contributes to the limited research base on knowledge sharing in public sector organisations, specifically police forces, and organisations in the Middle East through a case study investigation into the factors that affect knowledge sharing in the Dubai Police Force. A questionnaire-based survey was conducted with staff in key departments in the Dubai Police Force. Informed by the literature and by interviews conducted in a previous phase, the core of the questionnaire was a bank of Likert-style questions covering the dependent variables intention to knowledge share, and attitude towards knowledge sharing, and the independent variables, trust, organisational structure, leadership, reward, time, and information technology. Data was analysed using structured equation modelling, in order to test the measurement model using confirmatory factor analysis, and to test the structural model. The structural model suggests a strong relationship between attitude to knowledge sharing, and intention to share knowledge. Hypotheses regarding the influence of leadership, trust, organisational structure, time, and information technology on attitude to knowledge sharing were upheld. Rewards did not to influence attitude to knowledge sharing. Recommendations are offered for practice and further research.     

评“《自然》评出的2012年五大挑战性科学实验”

逐条分析了《自然》评出的五项前沿实验:(1)寻找外星生命的"蛛丝马迹",(2)看穿手性分子的"镜像",(3)寻找额外的空间维度,(4)捕捉引力波,(5)对千克进行重新定义。得出了前两个实验是近期不可能实现的伟大理想,后三个是将物理学拉向泥潭的谬论。     

基于防撞预警功能的图像式汽车行驶记录仪的设计

本文设计了一种车载图像记录仪。采用三星S3C2410微处理器作为车载图像记录仪的硬件。本系统提出防撞预警系统纵向与侧向安全距离的数学模型,并确定了其中一些参数的取值。在微处理器的控制下,采用毫米波雷达和超声波传感器进行测距实现水平方向和垂直方向全方位的动态扫描,实时监测目标车辆与周围车辆的距离。当进入测量领域的车辆与目标车辆的距离达到设定的安全门限时,立即打开视频并进行语言报警,提醒驾驶员及时调整车辆的行进路线,进行相应的避让和其它处理。该仪器在汽车交通领域具有重要的应用价值。     

金庸小说《笑傲江湖》中语用模糊现象浅析

《笑傲江湖》的语用模糊现象可以从说话人、听话人及非对话无声语言三个角度加以分类,通过对其在文本中的显现方式和作用分析,探讨了语用模糊现象在汉语文学文本中的存在及价值,并提出语用模糊认识框架可以拓宽到无声语言层面。     

苯酚—硫酸法测定人参果中多糖含量

对人参果多糖的超声波提取工艺及其苯酚-硫酸法测定进行了研究.结果表明人参果多糖的最佳提取条件为:超声波温度40℃,作用时间20min,料液比1:30.在此条件下,用苯酚-硫酸法测得人参果多糖含量为13.897%.该方法简便、准确率高、重现性好,加标回收率为98.898%,R SD=1.27%(n=5),适用于人参果多糖的含量测定.     

提高8号煤矿许用毫秒雷管可燃气安全度方法探析

通过大量的试验和理论分析,找出了影响8号煤矿许用毫秒延期电雷管可燃气安全度的原因,并制定了提高可燃气安全的措施。