高斯束谐振系统对遗迹高频引力波方向的选择效应

高斯束谐振系统为早期宇宙遗留的随机高频引力波的探测开启了一个非常重要的窗口．本文指出,当入射引力波的传播方向与高斯束不同时,高斯束谐振系统产生的一阶扰动光子流将降低几个数量级,即高斯束谐振系统只对沿某一特定方向传播的高频引力波产生响应．因此,高斯束谐振系统对高频引力波的传播方向具有良好的选择效应．     

高斯束谐振系统对引力波频率的选择效应

高斯束谐振系统对同频率的高频遗迹引力波具有很好的谐振性,这为高频遗迹引力波的探测开启了一个窗口.笔者指出,当入射引力波和高斯束不同频率时,高斯束谐振系统产生的一阶扰动光子流没有观测效应.     

高斯束谐振系统对引力波频率的选择效应

高斯束谐振系统对同频率的高频遗迹引力波具有很好的谐振性,这为高频遗迹引力波的探测开启了一个窗口.笔者指出,当入射引力波和高斯束不同频率时,高斯束谐振系统产生的一阶扰动光子流没有观测效应.     

引力波和电磁场作用中扰动光子流的接收面

根据弯曲时空中的电动力学,引力波和电磁场相互作用时将产生扰动电磁场.在特定的电磁系统中,即一个在静磁场中传播的高斯光束,如果入射引力波和高斯光束同频并且沿着高斯光束的对称轴Z方向传播,则高斯光束将和产生的扰动电磁场发生最佳同步谐振,导致沿高斯光束电场方向仅仅存在扰动光子流,即扰动电磁能流.详细计算和分析了扰动光子流的一些典型空间分布,找到了一个扰动光子流可能的最佳接收面.计算表明,它接收到的扰动光子流可望达到104s-1量级.这对高频引力波的探测将提供一个新的理论依据.     

高频引力波的电磁响应

综述了可能存在的高频引力波源，列举了高频引力波电磁响应的几种具体形式，重点介绍了高频电磁波束对引力波的电磁响应及使用该方法探测高频引力波的现实性．     

静磁场中引力子转化成光子的概率研究

运用费曼微扰方法计算了由超导墙和分形膜组成的电磁谐振系统中引力子转化成光子的转化概率。理论推导表明,当超强激光产生的高频引力波(high-frequency gravitational waves, HFGW)通过耦合开放腔时,在一段持续的时间内将产生扰动光子流(perturbative photon flux, PPF)。通过引入相关实验参数以及运用转化表达式,针对吉赫兹频带的高频遗迹引力波(high-frequency relic gravitational waves, HFRGWS),计算了在1 s的持续时间内,在耦合开放腔中产生的扰动光子流（～1011）,这些光子流通过分型膜传输,光子流的产生直接证明了引力子的存在。同时,也对超高强度激光作为引力子产生源作了简短的评论。     

高频引力波的电磁响应

综述了可能存在的高频引力波源,列举了高频引力波电磁响应的几种具体形式,重点介绍了高频电磁波束对引力波的电磁响应及使用该方法探测高频引力波的现实性.     

引力波与电磁场的相互作用

J.M.Charap,M.J.Dnff曾经研究场——米尔斯场中的引力效应,本文从弯曲时空的电磁场方程出发,给出了一个自对偶解,说明在引力波作用下重直于引力波传播方向的电场分量将受到引力波的调制,调制度由引力波的振幅决定,并且将绕引力波传播方向偏转,偏转角由时空弯曲性质决定。两个行于引力波传播方向的电场分量则不受影响。磁场也有类似变化。     

引力波及探测雏议

本文扼要论述引力波及其产生的机理，对当代引力波的探测进行简要评述，指出引力波探测的前景和引力波研究的重要意义。     

彗—木相撞辐射引力波的估算

选用一合理的模型，估算了１９９４年７月发生的彗（ＳＬ９）—木相撞辐射引力波的强度和功率．所得结果表明引力辐射强度远低于目前引力波检测装置所达到的灵敏度．计算过程与所得结果富有启发性     

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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