迈克尔逊干涉测薄膜厚度

利用迈克尔逊干涉原理测量薄膜厚度的方法,以测量PE保鲜膜和透明塑料膜为例,采用白光干涉产生的彩色条纹来精确测量薄膜的厚度,通过采集干涉产生的实验数据,计算出薄膜的厚度,这是一种实用有效的方法.此方法的测量范围为1μm～1cm,测量精度为0.1μmn.     

气溶胶吸收系数光热干涉法研究

基于偏振光的琼斯矢量表达式和偏振器件的琼斯矩阵表示法,对偏振干涉测量系统中偏振态的变化进行了理论分析与推导计算,为光热干涉测量实验提供理论支持。并对测量的干涉信号进行了调试,获得了相对较好的李萨如圆,验证了之前的理论推导及测量实验。     

基于调频连续波的地基干涉合成孔径雷达微形变监测实验平台

地基干涉合成孔径雷达具有测量精度高、测量距离远、全天候等特点,适用于大坝、桥梁的微形变监测。该文搭建了基于调频连续波的干涉合成孔径雷达系统实验平台,通过干涉测量原理构建模型分析回波信号,改进成像及形变监测算法,提高系统监测能力。搭建滑坡位移形变模型,验证系统设计和形变测量方法,实验测量结果与实际移动值相差0.11 mm,误差在规定范围内,满足系统性能要求。     

基于图像处理技术的可视化干涉条纹处理计数系统

为了解决传统实验与测量应用中,由测量人员肉眼观察并记录干涉条纹变化信息过程中存在的易出错、效率低、劳动强度大等问题,采用计算机图像处理技术提供一种便捷高效的解决方案,通过图像采集与处理,设计干涉条纹处理计数系统。该系统选用CMOS摄像头实时采集干涉条纹图样,运用VC++6.0编写图像处理程序对干涉条纹图样优化处理,最终实现自动计数。经验证,干涉条纹计数系统计数准确、性能稳定、效率高,可减轻劳动强度、提高测量精度、满足应用需求。     

双超声波干涉偏移法测量流体流速

介绍了一种基于两个波源的双超声波干涉偏移法测量流体流速。推导了利用介质流动造成的偏移效应来测量流体速度的近似公式,利用超声波信号干涉的方程揭示出了流体的流速与超声波信号干涉强度之间的关系,并结合计算机模拟和分析了这种关系,获得了曲线的线性近似的适用范围,利用CASSY Lab系统平台对气体流速进行了测量和验证,分析了实验误差。实验证明利用双超声波干涉偏移法测量流体流速的结果与现有的风速仪测量的值基本吻合,平均相对误差为5.5%。     

对压电陶瓷微振动干涉测量装置的研究

采用激光干涉的方法,对压电陶瓷的压电特性进行观察和测量．主要是对压电陶瓷的振动幅度和驱动信号周期进行测量计算．采用单片机编程计时计数,计算驱动时间t和干涉条纹移动数目m,再编程算法求出压电陶瓷位移,最后将测量计算值送数码管显示．     

二元频谱干涉测距方法及其统计误差分析

讨论了二元频谱干涉的测距方法,分析了二元频谱干涉测距方法的统计误差,通过对比得出了二元频谱干涉测距方法的测量精度高于一元频谱干涉测距方法测量精度的结论,为频谱干涉类无线电定位,无线电测距及激光测距等精密仪器的方案设计提供了一定的理论依据。     

“光的干涉”解析

1光的双缝干涉 例1 如图1所示,在双缝干涉实验中,S1和S2为双缝,P是光屏上的一点,已知P点与S1和S2距离之差为2．1×10^-6m,今分别用A、B2种单色光在空气中做双缝干涉实验,问P点是亮纹还是暗纹？     

用劈尖干涉测定液体折射率

依据等厚干涉原理 ,介绍用劈形薄膜表面上所产生的干涉现象即劈尖干涉测定液体折射率的方法 ,并给出测量结果 .     

迈克尔逊干涉实验中一个现象的分析

笔者在用激光光源做迈克尔逊干涉实验时，除了得到教材中应有的干涉图样外，还发现了一个在其对面的、在实验测量时不动的图形。本文对这一现象进行了分析和探讨。     

汉字倒说

汉字的六书,《说文》对“转注”一类,语焉不详。后世学者提及转注,也仅限于许慎所举出的例字。《汉字例说》一文,作者从转注的角度综合考虑,对部分现代常用字作了分析,跟传统的解释有所不同。希望能抛砖引玉,互相切磋,以推进学术研究。     

卡思卡特城堡

It is worthy of noting that, whilst Crookston Castle witnessed the earlier and happier portion of Mary's variegated life,     

不同的吃喝玩乐

一、吃和喝吃苹果 eat an apple, 吃药 take medicine,吃糖 have some sweets,吃饭 have one's meals,吃馆子 dine out,吃惊 be surprised/     

漏洞百出的教育

Many college freshmen arrive woefully unprepared to do college work, and as disadvantaged populations continue to grow, the share of the American work force that has made it through college is expected to plummet. Many experts blame that educational failure not just on high schools but also on colleges. School & College, a special report by The Chronicle, looks at efforts to fix the system. What reforms would better prepare students for college? What should schools and colleges be doing differently? How should state and federal officials help?     

钱生钱!

我们绝大部分人都同意一件事情——我们喜欢金钱。但是你对金钱的喜欢之情足够到让你创立一份事业么?.财富通常被人忽视,主要在于人们不能真正了     

只要努力,不要后悔

There are numbers of crossroads on our long and unpredictable life journey where we totally have no idea about which direction to choose. No matter what our decision is, we should not turn back, but face the music and go ahead instead. I am this kind of girl who always does try without regretting, one example is how I dealt with my love.     

Inequalities for inscribed simplexes

The problem on the geometrc inequalities involving an n-dimensional simplex and its inscribed simplex is studied. Aninequality is established, which reveals that the difference between the squared circumradius of the n-dimensional simplex andthe squared distance between its circumcenter and barycenter times the squared circumradius of its inscribed simplex is not lessthan the 2(n-1)th power of n times its squared inradius, and is equal to when the simplex is regular and its inscribed siplex is atangent point one. Deduction from this inequality reaches a generalization of n-dimensional Euler inequality indicating that thecircumradius of the simplex is not less than the n-fold inradius. Another inequality is derived to present the relationship betweenthe circumradius of the n-dimensional simplex and the circumradius and inradius of its pedal simplex.     

浅谈移民问题

Migration occurs behind a variety of reasons and has a great effect on the whole world. People may migrate in order to improve their economic situation, or in order to escape civil strife, persecution, and environmental disasters. The impact of migration is complex, bringing both benefits anddisadvantages. This paper briefly talks about the causes of migration, the allocation of benefits, and the ways in which individual countries and the international community deal with this important subject.     

微薄的薪水,高尚的情操

现在,我们可以没有面包,没有钱,没有房子,没有车子……但我们唯独不能丢失的是高尚的情操,笃定的信念,还有,满满的希望!     

Virtual reality approach for 3D large model browsing on web site

Using virtual reality for interactive design gives a designer an intuitive vision of a design and allows the designer to achieve a viable, optimal solution in a timely manner. The article discusses the process of making the Virtual Reality System of the Humble Administrator＇s Garden. Translating building data to the Virtual Reality Modeling Language （VRML） is by far unsatisfactory. This creates a challenge for computer designers to do optimization to meet requirements. Five different approaches to optimize models have been presented in this paper. The other methods are to optimize VRML and to reduce the file size. This is done by keeping polygon counts to a minimum and by applying such techniques as object culling and level-ofdetail switching.