基于动态规划的企业投资决策模型

为了保证企业投资决策最优的投资效果,企业应把投资决策过程分为多个阶段.建立了以获得利润最大化,同时把投资总风险控制在可承受范围内为目标的基本动态规划模型.该模型把一个多阶段的投资问题转化为多个单阶段的问题,从而求解整个投资阶段的最优决策问题就转化成求解一系列单个投资阶段中的最优问题.     

铁路运输企业固定资产投资方向控制模型

根据铁路运输企业固定资产投资与运输能力和安全的基本关系,建立铁路运输企业固定资产投资方向控制模型,并用广西沿海铁路公司生产经营的实际数据对模型进行检测。结果模型能够正确把握铁路运输企业的固定资产投资比例,计算得到的结果与广西沿海铁路公司运输安全生产的实际情况基本相符合。     

浅谈工程项目的投资控制

工程项目的投资控制与企业效益息息相关，是工程造价的重要组成部分。本文从工程建设项目全过程的各个阶段对投资控制进行了分析，以供参考。     

企业投资循环内部控制机制研究

设计了企业投资循环内部控制机制,明确了企业投资应当保证达到的目标以及投资循环内部控制流程．提出8个投资循环内部控制的关键控制点,为企业规范投资行为、监控投资过程、实现投资利润的最大化提供理论参考借鉴．     

分阶段投资在风险投资行业中的应用

创业企业的发展具有很高的不确定性，为了控制风险，风险投资家在对创业企业的投资中往往采取分阶段投资的策略。文中通过构建一个两阶段投资模型，比较分阶段投资与一次性投资对于企业激励作用的影响。     

资产投资的多目标规划模型

给了出一个控制投资风险，进行组合投资的双目标规划模型及求其非劣解和最终解的方法。     

试论会计内部控制

本文结合对当前企业内部会计控制的现状分析。从货币资金、实物资产、对外投资．工程项目、成本费用控制五个方面具体控制探讨了企业内部会计控制的基本内容，同时，对科学完善的企业内部会计控制的构建模式和运行机制进行了初步分析和探讨，明确了内部会计控制作为企业内部控制体系的重要组成部分，是防止企业内部的错误与舞弊行为，确保会计信息的真实可靠所必须遵循的重要制度。     

基本建设投资控制的对策

增加项目前期工作深度，提高设计工作质量，强化投资成本意识，建立和完善企业责任制，这篇文章提出了几条基本建设投资控制的对策。     

国际投资基本格局及其形成的理论分析

国际投资基本格局及其形成的理论分析①陈协旺国外直接投资或国际投资，无论是采取创办企业的形式或控制企业的形式，无论是以取得技术为目的，或是以转让技术为目的，直接投资都可以使某些国家通过本国的企业对接受国的经济施加影响。因此，在６０年代和７０年代直接投资...     

城镇建设用地控制模型研究--以重庆市为例

分析了城镇建设用地扩展的内在机理，提出城镇人口增长和固定资产投资是拉动城镇建设用地需求的两大因素-据此对城镇建设用地控制指标体系建设进行了探索性研究，构建了建设用地控制模型，提出了重庆市土地利用总体规划修编城镇建设用地控制目标．     

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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