计算投资内含报酬率的试差方法

投资的内含报酬率是长期投资决策的重要依据．章给出了计算内含报酬率的试差方法，科学、新颖、简便、实用，是计算投资内含报酬率的较好方法．     

关于用逐次测试法求内含报酬率的改进设想

针对管理会计教材中用逐次测试法求内含报酬率时在方法上的许多不足之处，提出了改进措施，给出了统一的求解逼近公式，并建立了衡量逼近精度的误差控制表达式．用改进的方法求内含报酬率，操作简便，收敛加快．     

内含报酬率计算与应用问题研究

内含报酬率指标有其优缺点,针对目前常用的图解法和逐步测试逼近法的缺陷,设计出进的“图示与代数公式法”。利用高等数学的基本原理,给出一个项目同时出现两个及两个以上内含报酬率的严谨的求解方法,通过对内含报酬率指标和净现值指标进行对比分析,解决二者之间可能出现的矛盾。     

内含报酬率法的运用

分析了内含报酬率法运用过程中的有关问题，并提出了修正内含报酬率法的一种方法和求解内含报酬率的一种新数值方法。     

求解内含报酬率的数值方法

介绍了求解内含报酬率的常用方法，提出了求解内含报酬率的一种新方法－－逐步副近法，并通过计算机语言编辑实现了逐步副近法运算，很好地解决了求解内含报酬率的方法问题。     

内含报酬率的实质及应用

指出了净现值法的局限性、对内含报酬率进行剖析并给出了严格定义，阐明其经济意义及评价标准。指出只有对投资规模同现金流量一起考虑时，内含报酬率才有意义。只有投资项目是纯投资时，内含报酬率才唯一确定。这样在进行动态投资的分析中才能作出合理可行的决策。     

应用切线迭代法求内含报酬率的方法

给出了玫个用牛顿切线法求解内含报酬率的新方法，与求ＩＲＲ的其它解法相比，该方法显示出操作简捷、收敛加快的特点。     

谈净现值法和内含报酬率法的冲突与一致

本文通过实例与图示对净现值法和内含报酬率法进行了分析与比较,为科学地运用这两种方法评价不同情况下的投资方案提出一种思路。     

试论内含报酬率的计算方法

分析了现行内含报酬率计算方法存在的不足，并提出了新的计算方法．     

λ──矩阵等价标准形的数值解法

首先给出了３、４阶方阵Ａ的特征矩阵λＡＥ－Ａ的等价标准形的数值解法，其次借助于复合矩阵该划了λ－ａ在Ｄｋ（Ａ（λ））中的指数，从而给出了一般情况下Ａ（λ）的等价标准形的数值解法框架．     

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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