LAGRANGE力学中的时空分立变换

讨论Lagrange力学中的时间反演、空间反射及其复合变换.给出Euler-Lagrange算子的时空分立变换性质,指出等效的Lagrange函数的时空分立变换性质可能不同.     

关于时空相对性的一种新认识

根据波速的普适不变性和等效Galileo迭加性,提出了基于源和接收者相对运动的Galileo-SR变换,据此导出了基于有限光速的Galileo时空相对性关系.提出了基于推迟效应的推迟相对性概念.导出了基于Galileo-RET变换的推迟Doppler频移和推迟时空相对性结论.在Galileo-SR变换和Galileo-RET变换的框架内,时间与空间独立、闭环运动中时空守恒、Newton力学无须改变仍适用于相对运动的惯性系.Micheiso-Morleyn实验、Fizeau实验、光行差、横向Doppler频移实验、运动粒子寿命实验的结论可以得到解释.狭义相对论是以有限光速对轨道运动进行观测角[0,2π)均匀分布的统计观测的理论,其时间延缓和横向Doppler频移结论适用于对轨道运动的横向观测.     

广义时空变换理论

以复四元数为时空代数，建立了一个广义时空变换理论．这个理论的主要部分包括广义场，时空变换和运动理论．作为狭义相对论的发展，理论中的变换适合任意的运动，从而可以构成相对论物理学的更为完整的理论基础．     

基于电磁信号的相对论时空测量

对高速运动物体的时空测量,只有洛仑兹变换是不够的,必须涉及信号传递.基于电磁信号,对相对论时空测量进行了研究,得出时空测量的基本公式.并就一些实际问题进行了讨论.     

在空间分立点加时间周期信号控制时空混沌

以一维非线性漂移波方程为模型,讨论了其时空混沌运动的控制,研究表明,通过在空间分立点加上自然频率的时间周期信号,可以控制时空混沌运动,这种方法较之在连续空间加周期信号的方法,在有些系统中,实验上更容易实现。     

一种启迪思维、拓广思路的物理学方法：—标度分析与变换

物质世界时空结构上的自相似性（即无穷嵌套现象）证实了自界的许多性质及其部分运动规律只取决于于物质世界自身结构的拓扑性质，而与空间绝对大小无关，因此可利用对已有的“大（或小）物理世界”的认识和物理空间基准量（特征量）选择的自由来预测并进而发现未知的 “小（或大）物理世界”的运动规律，这一过程称之为标度分析与变换，利用对事物某一标度层次上的认识和具有启迪思维和拓广思路的标度分析与变换方法可以去把握事物各个标度层次上的运动特性。     

基于Radon变换的运动模糊图像参数估计

通过对运动模糊图像进行分析,提出了对运动模糊图像两个重要参数:运动模糊角度和模糊长度估计的一种新的方法.基于频域特性利用Radon变换对模糊图像的模糊方向进行估计的改进,又根据Radon变换的性质,将投影理论引入到运动模糊长度的估计中.仿真实验证明了其估计结果的正确性且表明,该方法简单可行,较之先前提出的许多复杂的方法,该方法具有较高的精度.     

五体船运动非线性特性检验方法

采用替代数据法研究了五体船在随机海浪中运动响应系统性质的判别问题. 针对3种侧体排水量比例的五体船型在不同海况、浪向下的运动响应时历，运用改进傅里叶变换算法生成替代数据，计算检验统计量的判别指标，在显著水平为005下，对五体船运动响应系统性质进行了判别. 结果表明：五体船在随机海浪中的运动响应表现为线性系统特征，前后侧体的增加未改变五体船运动响应系统的性质，替代数据检验法能够准确合理地判定五体船运动响应系统的特性.     

自旋与相对论协变性——关于自旋本质的讨论

本文论证了:自旋是场的一种相对论效应,并具有时空的几何特性的品格,无论对于经典场和量子场都是这样,所以,自旋的值完全取决于时空的变换性质,但另一方面,自旋与其它时空力学量相对易,又似乎显示它的内禀性质。因此,自旋乃是具有独特品格的时空量。本文指出,对于自旋本质的进一步探讨,应结合微观粒子的结构和广延性进行。     

电磁作用的相对性

通过Minkowski时空中四维力的坐标变化变换关系导出三维力的相对论变换关系,并以此为基础分析讨论了运动电荷受力的具体特性,得出运动电荷受力规律具有相对性,进一步揭示出电与磁的相对性及内在统一性。     

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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