解表类中草药中微量元素的主成分分析

通过SPSS13.0软件对解表类中草药中的微量元素进行主成分分析,得到了解表类中草药微量元素间的相关矩阵、特征值及方差贡献率,并对中草药的质量做了综合评价,这为中草药的研究提供了一定的理论依据,可以帮助我们更好的研究分析中草药中微量元素的作用,同时对解表类中草药的质量优劣作出科学的评价.     

11种中药中微量元素的主成分分析

应用化学计量学方法,计算了11种中草药中微量元素之间的相关矩阵、载荷矩阵及各因子的综合得分,其中各微量元素的因子得分和主成分分析可以用于这11种中药药材的综合质量评价,为中药药理研究提供了一定的理论依据.     

治疗胆结石类中草药中微量元素的主成分分析

通过SPSS13.0软件对中草药中的微量元素进行主成分分析,获得微量元素之间的一些内在关系.通过主成分分析可以评价中草药的质量优劣,找到微量元素与人体健康的联系,从而为中草药的机理研究提供一定的理论基础.     

五味中草药中微量元素的综合评价

对五味中草药中微量元素进行分析,通过主成分分析的方法对中草药中微量元素进行综合评价,通过因子分析微量元素K、Ca、Mg、Cu、Zn、Fe、Mn等7种元素的功效,结果表明:这些元素与中药的药理作用有相关性.     

十二种花类药材中八种微量元素的主成分和因子分析

应用化学计量学方法研究了十二种花类药材中所含微量元素之间的关系,结果表明应用四个主成分可以合理解释微量元素之间的相关关系; 主成分分析和因子得分可以用于十二种不同花类药材质量的综合评价,为花类药材的合理利用提供了可靠依据.     

青海6种主要农产品中微量元素的特征分析

采用主成分分析法,对青海省海东地区6种主要农产品中10种矿物元素含量与产品品质之间的关系进行综合评价。通过该法对微量元素的含量数据进行降维处理,并利用SPSS 19.0软件进行计算,提取特征值大于1.2的成分为主成分,其结果显示前3个主成分的累计方差贡献率达到86.15%,即保留了全部原始数据86.15%的信息,基本能反映总体情况。主成分综合得分反映出微量元素在6种农产品中的总体含量水平,其顺序由高到低依次为:春小麦蚕豆玉米青稞豌豆油菜籽,进而体现了微量元素在几种农产品中的分布特征。分析结果表明主成分分析和因子得分可以用于农产品质量的综合评价,为农产品生产、品质评价及相关研究提供数据支撑和科学依据。     

治疗高血压病中草药中微量元素的主成分分析

采用主成分分析法对7种治疗高血压的中草药中的微量元素进行分析,获得治疗高血压的中草药中微量元素之间的相关关系,并对这7种中草药进行了综合排名,得到了7种中草药的质量优劣,分析总结出了微量元素的作用,研究对治疗高血压中草药的研发提供一定的理论依据。     

粉煤灰品质主成分分析综合评价

为解决目前粉煤灰单因子评价方法不能全面综合反映粉煤灰品质的弊端,采用主成分分析方法,建立用于评价大掺量粉煤灰混凝土中粉煤灰品质性能的综合评价法.研究结果表明:利用R软件强大的统计功能,运用主成分分析原理,可以将粉煤灰样本的大量性能表征指标构造成少数的几个变量,并通过计算各样本的主成分值,以各主成分的贡献率为权重值,得出各粉煤灰样本的综合得分,通过最终的主成分综合得分来划分粉煤灰质量等级,实现对粉煤灰品质进行快捷、客观的综合评价.     

11个不同产地枸杞子中微量元素和黄酮的主成分分析

利用主成分分析对11个不同产地枸杞子中的5种微量元素和黄酮含量进行分析,找到微量元素和黄酮的含量与枸杞子质量优劣的相关关系,得到不同产地的枸杞子质量优劣的综合排名.然后利用聚类分析对11种不同产地枸杞子进行聚类,结果恰好与主成分分析结果一致,说明主成分分析法所建的枸杞质量优劣评价模型稳定可靠,可以为枸杞子质量优劣评价研究提供一定帮助.     

组合模型在酿酒葡萄品质综合评价中的应用

利用主成分分析法、综合评价法、加权灰色关联度分析和TOPSIS方法,针对27个酿酒葡萄样品建立组合模型,对酿酒葡萄的品质进行综合评价,得到样品2、9和23质量很好,样品7、11、12和18质量很差,其它样品质量在二级与三级范围内。     

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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