量纲分析原理在物理学中的应用

量纲分析法是研究物理问题的重要方法之一,文章在阐述量纲分析的基本理论Ⅱ定理的基础上,把量纲概念与矢量空间联系起来,提出用矩阵进行量纲分析的方法,并应用该定理半定量地分析了部分实际物理问题.     

量纲分析在基础物理学中的应用

量纲分析法是研究物理问题的重要方法之一.本文在阐述量纲分析的基本理论∏定理的基础上,运用量纲分析解决具体的物理问题,并举出一些实例进行了论证.     

量纲分析法求解复摆和扭摆的振动周期

通过对量纲概念及量纲分析基本理论的分析讨论,用实例解释了在求解振动周期中的量纲分析应用.用量纲法分析振动的周期,只要选择主定参量,而对物理过程几乎不需再作分析.     

基于量纲分析的测试计量仪器创新设计

概念设计是产品创新的核心,在测试计量仪器的概念设计中,借助量纲分析法,对物理量进行分类,并建立了量纲表,借鉴系统论和进化设计思想建立了基于量纲分析的产品创新设计模型,通过挖掘具有物理参数遗传特性的量纲序列构建有效设计资源链,在多领域知识空间进行寻优以实现向领域解的进化,将为计算机辅助计量测试仪器的创新设计提供支持.     

量纲分析及其在物理实验中的应用

基于对量纲基本概念和量纲分析法基本原理的分析，探讨了量纲分析在物理实验中的应用。在物理实验教学中，采用物理量的量纲表示可以方便单住换算，利用量纲基本规则可判断物理公式的正确性，通过量纲的分析可使寻找物理量间复杂关系或规律变得简单。     

一例电学问题的量纲分析技巧

应用量纲分析方法对一个典型的电学问题进行研究,通过扩展空间基本量纲,我们得到比一般量纲分析更确定的结果。这种方法具有一般性,在量纲分析中被广泛地运用。     

量纲分析应用性研究

在量纲概念及量纲分析理论基础上,结合实例对量纲分析在定性地表示物理量与基本量之间的关系、有效地进行单位换算和物理公式检查、方程的正确性判断及物理规律推知等方面进行了应用性研究.提出量纲分析的简单应用和复杂应用,指出了应用的普遍性、简单性及不完全确定性.     

量纲分析中的矩阵法在热力学量中的应用

本文是把量纲分析中的矩阵方法用来变换热力学量的量纲和单位。     

量纲理论在粒子冲击钻井系统粒子分离效率研究中的应用

通过量纲分析对粒子冲击钻井分离系统实验台所得到的实验数据进行处理分析,结果发现钢质粒子损失率随着泥浆流量、黏度以及钢质粒子所占比例的增大而增大。量纲模型中表征几何特征、工作状态、泥浆流体特征以及流量等参数是主要影响因素。根据分析本文还提出了适用于多种泥浆工况下钢质粒子损失率的经验公式。     

量纲分析原理及应用

量纲分析法是物理学、数学中建立数学模型的重要方法之一。在物理学中它不但可以用来检验物理关系的正确性,而且还能进行单位换算和推导一些公式及设计实验时做相似模拟的基础。本文讨论了量纲分析的理论基础及方法,并示范推导一些重要的公式和其它一些重要的应用方面。     

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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