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概要分析Web2.0技术的概念及原理,研究Web2.0技术应用网络教学平台成功的案例,从中总结网络教学平台的先进技术和经验。通过电大网络教学平台和4A网络教学平台的比较研究,提出基于Web2.0技术的改进和设计方案,通过系统相关测试验证采用新技术的网络教学平台更能吸引学生群体自主学习。 相似文献
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Web2.0是几年来网络中最为热门的一个话题之一,它的到来改变了人们的生活方式、思维方式,使网络成为了生活中必不可少的内容,因此了解Web2.0的概念、技术、发展历程及现状、给人们带来的影响和发展趋势就显得尤为重要。 相似文献
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于文汀 《中国新技术新产品》2009,(17):255-255
本文从图书馆2.0的发展背景入手分析了图书馆2.0的基本理念及其主要技术支撑,同时简要探讨了图书馆2.0对馆员的技术素养要求。 相似文献
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张树新 《中国新技术新产品》2011,(7):246-246
本文介绍了高职图书馆应用Web2.0技术的意义。通过探讨Web2.0技术在高职图书馆应用的可行性,最后阐述了高职图书馆应用Web2.0技术提高服务的举措。 相似文献
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数据采集与实时处理技术广泛应用于雷达、通信、遥测遥感、海洋监测等领域,主要介绍一种基于DSP和USB2.0技术的双通道数据采集与实时处理系统设计方案,该方案采用TMS320C6713B作为核心处理芯片,CY7C68013为USB2.0接口芯片,给出了多通道采集系统的硬件设计及软件编程方法。 相似文献
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用紫外荧光发射谱较系统地研究了纳米非晶氮化硅块体(粒径~10nm)的能态结构,观察到三个发射带,它们分别对应2.0、2.8和3.2eV.随热处理温度升高,峰高增大,低真空下1000℃退火又出现一个新峰,对应3.0eV.分析表明,2.0和3.2eV 发射峰与纳米非晶氮化硅高比例界面中 Si 悬键形成受主型和施主型局域态能级有关.能级2.0eV 和3.2eV 分别对应导带电子与受主型缺陷局域态空穴复合及施主型缺陷局域态电子及价带空穴复合,只有在高温(1000℃)退火才出现的3.0eV 发射带与O-Si-N 生成新的缺陷局域态有关. 相似文献
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杨文刚 《中国新技术新产品》2008,(15):198-198
本文由Web2.0时代的一些新思想、新理念、新技术为着眼点,来分析在Web2.0时代应该如何利用先进的技术来进行图书馆的信息化建设,并以新潮的思想引导图书馆员树立交互性式的服务理念,最大程度的利用网络资源和人力资源服务于图书馆2.0的建设之中。 相似文献
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A method is proposed for estimating the parameters of a mixture of exponential and Weibull distributions for which the accuracy of preliminary estimates obtained by graphical analysis is refined in accordance with the criterion of maximum likelihood. The efficiency of the proposed method is supported by the results of statistical modeling. 相似文献
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An approximate analytical expression is derived for the velocity of the front of the wave of change of boiling modes on a
rod and on a plate. The impact of the Thomson effect and of the heater orientation in the gravity field is included. Adequate
agreement is demonstrated between the derived relations and experimental data. 相似文献
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Liebert A Wabnitz H Grosenick D Möller M Macdonald R Rinneberg H 《Applied optics》2003,42(28):5785-5792
A novel method for the determination of the optical properties of tissue from time-domain measurements is presented. The data analysis is based on the evaluation of the first moment and the second centralized moment, i.e., the mean time of flight and the variance of the measured distribution of times of flight (DTOF) of photons injected by short (picosecond) laser pulses. Analytical expressions are derived for calculation of absorption and of reduced scattering coefficients from these moments by application of diffusion theory for infinite and semi-infinite homogeneous media. The proposed method was tested on experimental data obtained with phantoms, and results for absorption and reduced scattering coefficients obtained by the proposed method are compared with those obtained by fitting of the same data with analytical solutions of the diffusion equation. Furthermore, the accuracy of the moment analysis was investigated for a range of integration limits of the DTOF. The moment analysis may serve as a comparatively fast method for evaluating optical properties with sufficient accuracy and can be used, e.g., for on-line monitoring of optical properties of biological tissue. 相似文献
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水三相点是开尔文热力学温度的唯一基准点,也是ITS-90国际温标重要的定义固定点。因此,水三相点不确定度分析对整个温标的建立、温度量值传递起着至关重要的作用。近3年来,中国计量科学研究院研制出一系列高质量的水三相点容器,加强了水三相点的研究,为不确定度的分析提供了更为可靠的实验依据。同时,不确定度的分析也是客观评价新研制容器性能的一个重要指标。因此,根据实验结果对新研制容器所复现的水三相点进行了不确定度评定。评定结果表明,其扩展不确定度为0.16mK(k=2.69,P=0.99)。 相似文献
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Conventional methods for summation of direct measurement errors are considered. Conditions under which these methods provide consistent results are stated. It is proposed to utilize for characteristic of the total error, its interval estimator or the half-sum of the value obtained by adding up its arithmetic and geometric random errors.Translated from Izmeritel'naya Tekhnika, No. 4, pp. 10–12, April, 1995. 相似文献