种用根状茎质量对盾叶薯蓣优质高产的影响

于2002年11月在广西南丹县河池林业科学研究所浅山丘陵区的缓坡杉木林地,按照的种植方法,用1级、2级、3级和4级种用根茎进行盾叶薯蓣(Discoria zingiberensis C.H.Wright)大田种植对比试验,分别测定盾叶薯蓣栽培1年和栽培2年的产量和薯蓣皂素含量.结果显示,播种第1年栽培期盾叶薯蓣出苗率为1级种＞2级种＞3级种＞4级种,在栽培满1年后的生长期中各级别的植株苗蔓长势差别不明显;盾叶薯蓣栽培满1年时各级别种茎产量为1级种＞2级种＞3级种＞4级种,薯蓣皂素含量为2级种=3级种＞4级种＞1级种;栽培2年的产量为1级种＞2级种＞3级种＞4级种,1级种和2级种产量差异不显著,其他各级别种茎之间产量差异极显著;栽培2年后薯蓣皂素含量为4级种＞3级种＞2级种＞1级种,3级种和4级种含量较高但差异不显著,其他各级别种茎之间有效成分含量差异极显著.建议选用2年生根状茎作种时,宜选用当年新萌生形成的芽头作种.     

Dirichlet级数的系数重排

研究了Dirichlet级数在系数重排后的增长性，分别得到了有限级Dirichlet级数的准确级和无限级Dirichlet级数的(R—H)级在级数系数重排后保持不变的条件．     

右半平面上的零级Dirichlet级数

研究了右半平面上零级Dirichlet级数的对数级增长性,得到了零级Dirichlet级数系数与对数级、对数下级之间关系的充要条件.     

关于全平面上收敛的B-值Dirichlet级数的(p,q)(R)级和下(p,q)(R)级

通过把B-值Dirichlet级数的(p，g)(足)级和下(p，g)(足)级转化为Dinichlet级数的(p，g)(R)级下(p，g)(R)级进行研究，结合有关Dirichlet级数的相应结果，得出了关于B-值Dirichlet级数的(p，g)(R)级和下(p，g)(R)级的充要条件。     

零级Dirichlet级数和随机Dirichlet级数的增长性

研究了全平面上一类零级Dirichlet级数和随机Dirichlet级数的增长性,得到了零级Dirichlet级数增长性的二个定理,以及当随机变量{X-n(ω)}满足一定条件时,零级随机Dirichlet级数增长性的一个定理.     

中国的空气质量报告需尽早与世界接轨

中国的空气质量分为5级,描述级别的词语却有7个,它们是:优(一级)、良(二级)、轻微污染(三级1)、轻度污染(三级2)、中度污染(四级1)、中度重污染(四级2)与重污染(五级)。     

无穷级Dirichlet级数和随机Dirichlet级数的下级

本主要研究半平面上无穷级Dirichlet级数及随机Dirichlet级数的下级增长性，对于无穷级Dirichlet级数，研究了它在下级增长性，得到了它的系数和指数与下级之间关系的充要条件；对于无穷级随机Dirichlet级数，证明了它的下级增长性几乎必然与其在每条水平直线上的下级增长性相同。     

半平面上零级Dirichlet级数的逼近增长

主要研究半平面上的零级Dirichlet级数的增长性,当lim sup n→∞lnλ/λn=0时,零级Dirichlet级数所表示的解析函数f(s)在右半平面内处处绝对收敛。利用Dirichlet多项式去逼近零级Dirichlet级数,得到了Dirichlet级数逼近误差与Dirichlet级数增长级和型函数之间关系的充要条件。     

粗粒土的级配方程及应用

采用二次函数建立了颗粒含量P与相对粒径x自然对数的非线性关系,提出了一种可以描述连续级配粗粒土的级配方程,验证了方程的适用性。将非连续级配粗粒土级配曲线离散为局部连续级配曲线,通过坐标变换,在连续级配方程基础上构建了非连续级配粗粒土的级配方程,采用数据论证了该方程的适用性,结果表明非连续级配方程可以很好地描述复杂形态的级配曲线。基于已有试验数据对连续与非连续级配方程进行了应用分析。结果表明,非连续级配方程计算Hardin相对破碎率与实测值更为吻合。本文研究成果将有助于理解粗粒土工程特性与级配的关系。     

以不同等级粉煤灰为原料的粉煤灰地质聚合物的性能研究

探究了使用三种不同等级的粉煤灰,Ⅰ级粉煤灰、Ⅱ级粉煤灰、Ⅲ级粉煤灰,在其他试验条件相同的情况下,参考水泥胶砂的凝结时间试验、抗压和抗折试验对粉煤灰地质聚合物砂浆的工作性能、力学性能的影响,并对经济效益方面进行比较。结果表明：从凝结时间来看,Ⅰ级粉煤灰>Ⅱ级粉煤灰>Ⅲ级粉煤灰;在抗压强度、抗折强度来看,Ⅰ级粉煤灰>Ⅱ级粉煤灰>Ⅲ级粉煤灰;从经济效益方面来看,使用Ⅰ级粉煤灰的价格最高,Ⅲ级粉煤灰价格最低。     

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     

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