迈克尔逊干涉仪的调正和使用

迈克尔逊干涉仪是1881年迈克尔逊为了研究“以太”是否存在而设计的仪器.它也是现在常用的分振幅法产生双光束以实现光的干涉的仪器之一,在近代物理和近代计量技术中迈克尔逊千涉仪也有着极重要的作用. 一、实验目的: 1、了解迈克尔逊干涉仪作为双光束干涉的特点,学习并初步掌握调整和使用迈克尔逊干涉仪的方法.     

检验空间各向同性的新方法

Mansouri-Sexl和Robertson的检验理论以及经典以太论,都是由光速c各向异性的光程差推导出待测的相位差,推倒中又都用了光波的波长λ和频率ν均不随方向变化的前提条件,从而与c=λν相矛盾。用接收器相对优越坐标系绝对速度的Doppler效应的观点替代光程差的观点,可使检验理论自洽,并预期可观测效应为各方向反射回来的光波呈现频率的各向异性。在此基础上,提出了一种检验空间各向同性的新方法——抗共模干扰激光拍频法。用它检验光速各向同性的精度△c/c优于1×10^-18,它比传统的Michelson-Morley干涉仪法和目前的基于稳频技术的激光拍频法精度高于1000倍以上。     

脉冲星是中子星还是奇异星

1900年，开尔文在一篇著名演讲中提出，物理学“晴空万里”，但只是有“两朵乌云”，其中一朵是“能量均分定理运用于黑体辐射时失效”，另一朵是“以太漂移测量的零结果”，对它们的研究，分别导致了本世纪两个最伟大的基本理论（量子论和相对论的出现。     

带均值漂移的HEGY检验及其实证研究

研究了含多个均值漂移的HEGY检验.通过模拟实验,发现如果没有正确选择HEGY检验所含有的均值漂移个数,那么检验结果将会产生偏差.用不含均值漂移、含一个均值漂移和含两个均值漂移的HEGY模型研究了广东月度工业总产值周期性变化问题,结果表明,1991年至2003年间广东工业生产存在两个季节性均值漂移,仅含有一个非季节单位根.因此,选择含两个均值漂移的HEGY模型更适合本问题的研究.     

滚转角测量方法的研究

采用直角坐标系统的机床或测量机共有２１项结构误差，其中１８项误差可以用现成的干涉仪测量，另外３项滚转角误差没有现成的仪器测量。提出了一种动态测量滚转角误差的方法，基于偏振面旋转角的测量，用半波片作传感元件，自动读出法给出测量结果。文中介绍了３个关键的问题：法拉第盒的设计、反馈方法消除旋光漂移以及进一步提高分辨率的方法。实验结果表明，这种方法具有良好的线性，分辨率为０．１″，漂移量为０．１５（″）／ｈ。     

含方差扩大的一般均值漂移模型的Score检验统计量

该文研究了含方差扩大的一般均值漂移模型中漂移量的存在性检验问题.利用Score函数和Fisher信息阵,获得了检验的Score统计量.     

NaI（T1）γ能谱分析中谱漂移的分时动态修正方法

作者为解决NaI(T1)γ谱仪在测量过程中谱漂移对解谱的影响，提出了一种软件分时动态谱漂移修正方法，并用3组份点源进行了检验．结果表明，修正启用神经网络方法解谱的误差由4．6％减少到3．0％．     

峰检验及在中国人均GDP分布中的应用

讨论了4种单变量密度函数的峰数检验，应用于中国人均GDP年度数据相关序列的分布检验，·发现一个带漂移项的随机游走过程．这为检验地方政府GDP统计数据的真实性提供一种新方法．     

光速问题综合分析

本文针对光速不变假设面临的问题,提出对光速问题进行重新考查。依据真空不空的观点提出了"类以太假说",以基本力分析为基础,探讨了类以太的作用特点与运动特性,论述了类以太对光速的作用影响,解释了历史上的光速实验,探讨了光速可变与超光速的检验方向,提出了相应的实验方法。希望以此促进光速问题的研究与解决,推动对相对论的再认识与再考查。     

以太坊,发展前景广阔

<正>近期有报道称,在2017年俄罗斯圣彼得堡国际经济论坛上,普京总统会见了以太坊创始人维塔利克·巴特林,并对他与俄本土公司合作在当地部署区块链技术的计划表示出极大支持。报道指出,这次俄最高领导人会见以太币创始人,对整个虚拟货币领域有着重要意义。这使得以太币以及其所依赖的平台以太坊受到广泛关注和重视。以太坊由巴特林在2013年创立。正是凭借设计发展以太坊的突出成就,巴特林击败Facebook创始人马克·扎克伯格等人,获得了2014年IT软件类     

Markedness and its Interpretation in Language Use

Language markedness is a common phenomenon in languages, and is reflected from hearing, vision and sense, i.e. the variation in the three aspects such as phonology, morphology and semantics. This paper focuses on the interpretation of markedness in language use following the three perspectives, i.e. pragmatic interpretation, psychological interpretation and cognitive interpretation, with an aim to define the function of markedness.     

Features of Women's language

Language is a means of verbal communication. People use language to communicate with each other. In the society, no two speakers are exactly alike in the way of speaking. Some differences are due to age, gender, statue and personality. Above all, gender is one of the obvious reasons. The writer of this paper tries to describe the features of women＇s language from these perspectives： pronunciation, intonation, diction, subjects, grammar and discourse. From the discussion of the features of women＇s language, more attention should be paid to language use in social context. What＇s more, the linguistic phenomena in a speaking community can be understood more thoroughly.     

低渗透非均质砂岩油藏启动压力梯度研究

理论推导与室内实验相结合,建立了低渗透非均质砂岩油藏启动压力梯度确定方法。首先借助油藏流场与电场相似的原理,推导了非均质砂岩油藏启动压力梯度计算公式。其次基于稳定流实验方法,建立了非均质砂岩油藏启动压力梯度测试方法。结果表明:低渗透非均质砂岩油藏的启动压力梯度确定遵循两个等效原则。平面非均质油藏的启动压力梯度等于各级渗透率段的启动压力梯度关于长度的加权平均;纵向非均质油藏的启动压力梯度等于各渗透率层的启动压力梯度关于渗透率与渗流面积乘积的加权平均。研究成果可用于有效指导低渗透非均质砂岩油藏的合理井距确定,促进该类油藏的高效开发。     

On Tragic Consciousness In The Works By Ernest Hemingway

As an American modern novelist who were famous in the literary world, Hemingway was not a person who always followed the trend but a sharp observer. At the same time, he was a tragedy maestro, he paid great attention on existence, fate and end-result. The dramatis personae's tragedy of his works was an extreme limit by all means tragedy on the meaning of fearless challenge that failed. The beauty of tragedy was not produced on the destruction of life, but now this kind of value was in the impact activity. They performed for the reader about the tragedy on challenging for the limit and the death.     

Achieving Unusual States of Matter Under High Pressure

正The periodicity of the elements and the non-reactivity of the inner-shell electrons are two related principles of chemistry,rooted in the atomic shell structure.Within compounds,Group I elements,for example,invariably assume the+1 oxidation state,and their chemical properties differ completely from those of the p-block elements.These general rules govern our understanding of chemical structures and reactions.Using first principles calcula-     

Exchange-Correlation and Electronic Excitation Energies from Pairing Matrix Fluctuations

We have developed an adiabatic connection to formulate the ground-state exchange-correlation energy in terms of pairing matrix linear fluctuations.This formulation of the exchange-correlation energy opens a new channel for density functional approximations based on the many-body perturbation theory.We illustrate the potential of such approaches with an approximation based on the particle-particle Random Phase Approximation(pp-RPA).This re-     

Density Functional Theory for the Response of Periodic Systems to Electric Fields Based on the Vector Potential Approach

正The electronic and nuclear(structural/vibrational)response of 1D-3D nanoscale systems to electric fields gives rise to a host of optical,mechanical,spectral,etc.properties that are of high theoretical and applied interest.Due to the computational difficulty of treating such large systems it is convenient to model them as infinite and periodic(at least,in first approximation).The fundamental theoretical/computational problem in doing so is that     

On the Thermodynamic Limit for Responses to Static Electromagnetic Fields

For molecular systems,the quantum-mechanical treatment of their responses to static electromagnetic fields usually employs a scalar-potential treatment of the electric field and a vector-potential treatment of the magnetic field.Although the potential for each field separately is associated with the choice of an(unphysical)origin,the precise choice of the origin for the electrostatic field has little consequences for the results.This is different for the     

Call for Papers

<正>"The Journal of Shanghai Normal University:Mathematics"is published by Shanghai Normal University as regular issues of The Journal of Shanghai Normal University each year from 2014 in English.The editors-in-chief of the issues are professors Yuhao Cong and Maoan Han.The Journal of Shanghai Normal University was started in 1958 with     

Journal of Donghua University ( English Edition) Contents of Volume 31

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