基于SecondLife的虚拟图书馆学习环境的设计与实现

本文探索了基于SecondLife的虚拟图书馆学习环境的构建.利用相关建模工具和Lindin脚本语言,实现了虚拟图书馆的搭建和学习环境的构建,试图从另一个侧面发掘图书馆的教育价值,探索一种新的学习环境.     

小睿美术发展记录(三)

儿子喜欢折纸飞机,我虽买折纸书给他,但他看不懂,按书上的方法老折不出来,于是就求我教他。我回答他说：“不要看着书折,你自己爱怎么折就怎么折,这样才有意思。”他听了后开始尝试自己“制造”飞机。[编者按]     

让心灵轻舞飞扬——浅谈音乐在高中语文教学中的运用

“音乐当使人类的精神爆发出火花”，德国著名音乐家贝多芬如是说。这决不是夸大其词，当你了解到贝多芬在耳聋之后还创作出《命运交响曲》的时候，当你听说他耳聋之后在台上指挥乐队演奏，观众掌声如雷，让贝多芬不得不一次又一次谢幕的时候，你被他的伟大的命运征服的同时，也会对这句话有所体会的。     

我笨故我在

记得夏目漱石先生曾经这样说过:人生二十而知有生的利益;二十五而知有明之处必有暗;至于三十岁的今日,更知明多之处暗也多,欢浓之时愁也重。一晃便走过了三十年人生。三十而立,是一座横亘在我面前的山峰,上面空旷辽阔,树木苍翠,云雾缭绕,霞光四射,那一种辉煌,那一     

Effective dielectric constant model of electromagnetic backscattering from stratified air–sea surface film–sea water medium

Studies of surface film medium on the sea surface are carried out in this paper for developing the technology to automatically detect and classify sea surface films, and an effective dielectric constant model of electromagnetic backscattering from a stratified air–ocean interface. Numerical results of the new model show the characteristics of effective dielectric constants for the air–sea surface film–sea water medium as follows. The effective dielectric constants decrease with increasing relative dielectric constants of the sea surface films. The effective dielectric constants decrease in horizontal polarization(abbr. HH polarization) and increase in VV vertical polarization(abbr. VV polarization) with increasing radar incident angle. Effective dielectric constants vary with relative sea surface film thickness as a cosinusoidal function of sea surface film thickness. Effective dielectric constant of VV polarization is larger than that of HH polarization. Two potential applications are found with our model, i.e., the retrieval of dielectric constants from the sea surface film, and the film thickness retrieval with our model. Our model has a highly significant influence on improving the technology related to the remote sensing of sea surface films.     

Detection of meso-micro scale surface features based on microcanonical multifractal formalism

Synthetic aperture radar(SAR) is an effective tool to analyze the features of the ocean. In this paper, the microcanonical multifractal formalism is used to analyze SAR images to obtain meso-micro scale surface features. We use the Sobel operator to calculate the gradient of each point in the image, then operate continuous variable scale wavelet transform on this gradient matrix. The relationship between the wavelet coefficient and scale is built by linear regression. This relationship decides the singular exponents of every point in the image which contain local and global features. The manifolds in the ocean can be revealed by analyzing these exponents. The most singular manifold, which is related to the streamlines in the SAR images, can be obtained with a suitable threshold of the singular exponents. Experiments verify that application of the microcanonical multifractal formalism to SAR image analysis is effective for detecting the meso-micro scale surface information.     

下棋给我带来了快乐

我的童年生活充满了欢乐。和小伙伴起做游戏是快乐的，做家务得到家长的夸奖是快乐的，看书沉迷于其中也是快乐的。而最能带给我快乐的事情却是和小伙伴下棋。     

我国高等教育大众化过程中的公平问题探析

高等教育公平问题是现代社会的焦点问题之一.本文提出了高等教育公平内涵的界定,分析了高等教育不公平现象产生的原因,并对促进高等教育公平应采取的措施做了进一步的探索.     

隧道二次衬砌监测的非线性回归分析研究

隧道二次衬砌性能劣化是影响隧道健康运营的主要病害,利用光纤通信技术对二次衬砌进行结构安全性分析,是保证隧道工程健康运营的重要手段。以埋入式光纤Bragg光栅应变传感器对田心隧道二次衬砌监测的实际数据为依据,选择最佳的典型函数模型对隧道的监测数据进行非线性回归分析,得出能够反映应变发展变化趋势的回归曲线,预测支护结构(监测点)的应变趋势,判断支护效果,对隧道支护结构当前的和最终的稳定性进行分析,从而实现对隧道结构部的稳定性判断。     

基于光纤Bragg光栅的量测锚头压力研究

锚头的受力情况对整个锚杆的安全性有着重要影响。为了实时反映锚头的受力状态,将2只光纤Bragg光栅沿45°粘贴在轮辐式结构锚头的两根对称辐条中点处表面上,形成轮辐式测力传感结构,辐条在压力作用下产生剪切变形,引起辐条表面的光纤Bragg光栅中心波长移位。通过对光纤Bragg光栅中心波长移位的测量,实现在锚头处锚杆轴向拉力的在线监测。锚头压力实验表明:光栅1的测力灵敏度为108.8pm/kN,线性度为0.042%FS;光栅2的测力灵敏度为115pm/kN,线性度为0.023%FS。