电力行业上市公司财务预警Logit模型实证研究

运用因子分析方法,得到反映上市公司经营状况的综合指标,以此为变量建立Logit财务预警模型。模型及参数均通过Wald检验,预报准确率令人满意,对证券投资及企业经营活动监控具有指导意义。     

基于因子分析和SVM模型的化学制品行业财务预警研究

针对化学制品行业财务预警研究,运用变异系数、相关系数剔除含有重复信息的财务指标,运用因子分析法进行降维处理,得到反映财务状况的盈利和偿债两个主因子,降低指标的复杂性。在简化的指标体系中,建立基于支持向量机的财务分类预警模型,为企业财务管理以及股市投资者提供相关参考。     

基于主成分分析和粗径向基神经网络的财务预警模型研究

将主成分分析和径向基函数神经网络结合,以粗糙集作为预处理器进行指标约简,并以传统财务指标为基础,引入反映企业现实财务状况的现金流量指标,通过主成分分析提取指标和降维,利用径向基函数神经网络作为判别企业财务状态的工具,构建上市公司财务危机预警的RPR模型,实证研究结果证明了该模型具有较高的建模精度和泛化能力。     

我国上市公司财务困境预警指标的检验及选取

为使上市公司财务困境预警指标选取的更科学、合理,利用Kolmogorov-Smirnov检验、Q-Q概率图对初选的28个财务指标正态分布进行检验,确定了后续指标选取方法,即用Wilcoxon非参数检验法对财务指标均值差异进行检验,用Spearman双尾t检验进行非参数相关分析,选取通过显著性检验的、指标间Spearman系数较小的财务指标作为输入变量.     

因子分析在股票论证中的应用

利用SAS软件,对深市537支股票2005年第一季度的八个财务指标进行了因子分析.将八个财务指标浓缩为三个因子,利用主成分法并作方差最大旋转,计算出了因子得分.根据得分多少,对各上市公司的股票作出了综合评价.     

基于多元Logistic回归模型的我国上市房地产企业预警

目前,许多房地产企业面临着融资、再筹资难等问题,企业倍受资金链压力,有的甚至陷入财务困境.采用主成分分析和Logistic多元回归相结合的方法,构建财务危机预警模型.借助SPSS19.0经济统计软件,对财务指标数据进行分析,并检验模型.以期为房地产公司提供财务风险预警的有效方法.     

装备制造企业财务风险预警模型的研究

选取3家装备制造业上市公司,使用功效系数法对其2010～2012年的财务指标进行预警模型研究。模型选择可反映装备制造企业经营情况的15个指标,采用Delphi法确定预警指标权重,分析各指标的特点,建立隶属度函数,并算出隶属度。通过模型的建立计算装备制造企业财务风险预警评价指标值,判别企业相应的财务风险评价级别,对企业账务风险进行警情分析。     

基于PCA-Logit模型的无车承运人风险预警

为了评估无车承运人承运经营的风险,提高风险预警的准确性,提出了PCA-Logit无车承运人风险预警模型.根据无车承运人经营过程中风险的主要来源,构建了包含26项指标的风险预警指标体系,在对指标体系进行主成分分析(PCA)的基础上,通过Logit风险预警模型计算无车承运人的风险概率.选取15家无车承运人企业进行案例分析,提取了累计方差贡献率达91.03%的8个主成分,根据因子载荷矩阵值得出8个主成分的表达式,采用最大似然估计法对Logit风险预警模型进行参数标定,并计算得到15家无车承运人企业的风险预警值.结果表明:无车承运人企业的风险概率与企业的管理水平、运输市场的市场竞争强度、托运人及实际承运人谈判价格的优势和托运货物的属性等因素具有较强的相关性.     

基于主成分分析的上市公司财务危机预警模型研究

建立了主成分分析预警模型,该模型可以用来对企业财务困境进行预测.经实证研究得出,该模型对检验样本的预测正确率为70%,说明主成分分析方法对上市公司的财务危机具有较好的预测效果.     

基于Logistic回归模型的IT企业财务危机预警的实证研究

以我国信息技术上市的ST公司和非ST公司作为研究样本,运用因子分析以及Logistic回归分析的方法,综合传统的财务指标和现金流信息指标构建适合IT企业的财务危机预测模型.并对模型的预测效果进行回判,验证了该模型对IT行业具有很好的预警效果.     

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     

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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Brief Introduction to “Journal of Jilin University( Science Edition) ”

<正>"Journal of Jilin University(Science Edition)"is a comprehensive academic journal in the fields of science sponsored by Jilin University and administrated by the Ministry of Education of the Peoples Republic of China.The journal started publication in 1955.The original name at starting publication was"Journal of Natural Science of Northeast People University",which was changed into"Acta Scientiarum Naturalium Universitatis Jilinensis"in 1958 owing to the name change of the university.The present journal name has