GM（1，1）模型参数估计的新方法

针对ＧＭ（１，１）模型预测估计值稳定性差等问题，从灰色建模基本要求出发，给出了一种新的ＧＭ（１，１）模型参数估计方法。与原方法相比，新方法参数估计值稳定性强，误差小，达到了理想的预测效果。     

引入二阶导数的梯度法

对最优化方法中的梯度算法进行了改进，当ｅ＾２ｆ／ｅｘ＾２≠０时，将二阶导数与梯度方向相结合，构造出一种新的下降方向ｄ＝「１＋δ／（ｅ＾２ｆ／ｅｘ＾２）」（ｅｆ／ｅｘ），其中δ＝１或－１，用新的下降方向设计了一种算法，使梯度法得到改进，新的算法比梯度法的收敛速度快，而且比牛顿法计算量小。     

关于一类半线性椭圆型方程的爆破解

提供一种新的方法研究问题（１）解的存在性，在此对ｋ（ｘ）的限制要比已有文献弱。     

一种新的奇阶幻方的公式构造法

用公式的方法构造了一种新的奇阶幻方，并且给出了构造２ｎ＋１阶幻方（ｎ〉１）的严密证明，最后给出了９阶幻方的实例。     

关于一半半线性椭圆型方程的爆破解

提供一种新的方法研究问题（１）解的存在性，在此对ｋ（ｘ）ｘ的限制要比已有文献弱。     

关于“多级火箭的优化理论 ”

１新的ＶＮ表达式的又一个应用１．１过去的ＶＮ表示式设有一图１所示的多级火箭，Ｗｉ为该火箭第ｉ级的喷气速度，Ｍ（１）ｉ为第ｉ子火箭在第ｉ级点火时的质量，Ｍ（２）ｉ为第ｉ子火箭在第ｉ级关机时的质量，Ｇ为该火箭的有效载荷，ｒｉ为质量比ｒｉ＝Ｍ（１）ｉＭ（２...     

完全多部图满足全色数猜想的一种新的证明方法

Ｂｅｈｚａｄ〔１〕和Ｖｉｚｉｎｇ〔２〕独立提出了全色数精想：对任意图Ｇ，有ｘＴ（Ｇ）≤Δ（Ｇ）＋２。本文的主要结果如下：（１）用一种新的方法证明了完全多部图满足全色猜想（２）证明了点数不大于１０的图满足全色数猜想。     

一致分子格及其性质

对分子格Ｌ上的自映射ｆ：Ｌ→Ｌ，提出了一种新的映射道ｆ－１：Ｌ→Ｌ，其中，对任意Ｌ中的元ａ，ｆ－１（ａ）＝∨｛ｂ∈Ｍ（Ｌ）｜ａ∧ｆ（ｂ）≠０｝．借助于此，引入了分子格上的一种对称的一致结构，证明了一个拓扑分子格（Ｌ，η）可一致化当且仅当它是全正则分子格．     

1—（4—磺基苯）—3—（2—噻唑）—三氮烯新显色剂的合成及应用

用一种新的三氮烯类显色剂，１－（４－磺基苯）－３－（２－噻唑）－三氮烯（ＳＰＴＴ）的合成方法，探讨试剂的分析性能，着重研究了试剂与钯（Ⅱ）的显色反应条件。     

渤海海域海冰严重灾害的灰色预测

根据１９６０－１９９５年间渤海海域的海冰灾害的实际观测资料，建立了信息ＧＭ（１，１）模型，并在此基础上又分别对ＧＭ（１，１）灰色预测模型提出新的改进型预测模型，并运用改进型的预测模型对渤海海域的海冰严重灾害进行预测，据预测未来可能发生的两次海冰严重灾害为２００３年和２０１１年。     

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.     

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     

An affordable accurate evaluation of the binding conformations predicted by molecular docking studies in bio-system

Franck-Condon factors bridge the gap between theoretical modeling and experimental observations for molecular electronic spectroscopy and electron transfer.Under the displaced harmonic oscillator approximation,multidimensional Franck-Condon factors are decomposed into a product of many one-dimensional(1D)Franck-Condon(FC)factors,and each 1D-FC factor is associated with one Huang-Rhys factor that determines the leading contribution of     

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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