PVC／NBR／SBS三元共混物的形态结构与性能

本文通过冲击试验、动态力学分析（ＭＭＡ）、透射电镜（ＴＥＭ）和扫描电镜（ＳＥＭ）观察，研究了聚氯乙烯／丁腈橡胶／苯乙烯。丁二烯。苯乙烯嵌段共聚物（ＰＶＣ／ＮＢＲ／ＳＢＳ）三元共混物的形态结构和性能，并且讨论了两者之间的关系。ＮＢＲ－２９对ＰＶＣ和ＳＢＳ有较好的增容作用，与ＳＢＳ一起对ＰＶＣ有协同增韧效应。     

PVC／SBS共混体系的增容技术研究

借助反应性挤出接枝的方法，在ＰＶＣ／ＳＢＳ动态硫化过程中引入顺丁烯二酯矸（ＭＡＡＮ），“就地”产生增容，以改装ＰＶＣ与ＳＢＳ间的相容性。用ＩＲ，ＳＥＭ，ＤＳＣ和力学方法对ＰＶＣ／ＳＢＳ共混体系进行表征，结果表明：此过程可以获得满意的共混效果，可以实现工业化生产．     

MAGNETIC RELAXATION AT EARLY TIMES AND FLUX DIFFUSION BARRIER V（J，B，T） FOR Ti－1223 DOPED WITH Pb AND Ba BY COMPLEX AC SUSCEPTIBILITY MEASUREMENTS

ＭＡＧＮＥＴＩＣＲＥＬＡＸＡＴＩＯＮＡＴＥＡＲＬＹＴＩＭＥＳＡＮＤＦＬＵＸＤＩＦＦＵＳＩＯＮＢＡＲＲＩＥＲＶ（Ｊ，Ｂ，Ｔ）ＦＯＲＴｉ－１２２３ＤＯＰＥＤＷＩＴＨＰｂＡＮＤＢａＢＹＣＯＭＰＬＥＸＡＣＳＵＳＣＥＰＴＩＢＩＬＩＴＹＭＥＡＳＵＲＥＭＥＮＴＳＤ...     

HIPS／SBR—g—PEMA共混物的力学性能和形态结构

采用种子乳液聚合法合成了丁苯橡胶接枝聚甲基丙烯酸乙酯共聚物（ＳＢＲ－ｇ－ＰＥＭＡ）。通过与高抗冲聚苯乙烯（ＨＩＰＳ）共混,研究了共混物的力学性能和形态结构。结果发现,在共混物中随着ＳＢＲ－ｇ－ＰＥＭＡ含量的增加,共混物的抗冲强度和断裂伸长率进一步提高,而屈服强度未表现出明显下降,从而有效地实现了对ＨＩＰＳ的进一步增韧。形态结构研究表明,ＳＢＲ－ｇ－ＰＥＭＡ与ＨＩＰＳ的基体具有良好的结合力,其尺寸约为１～３μｍ,并与共混物的力学性能结果表现出很好的吻合。     

透视双重制约下委婉用语的应用

透视双重制约下委婉用语的应用ＡＰＥＮＥＴＲＡＴＩＮＧＡＮＡＬＹＳＩＳＯＦＡＰＰＬＩＥＤＥＵＰＨＥＭＩＳＭＲＥＳＴＲＩＣＴＥＤＢＹＤＯＵＢＬＥＢＩＮＤＳ宁全新ＮｉｎｇＱｕａｎｘｉｎ（浙江水产学院基础部，舟山３１６１０１）（ＺｈｅｊｉａｎｇＦｉｓｈｅｒｉ...     

数据库中的批量数据录入技术

不论数据库开发应用平台是何种版本,在关系型数据库的程序设计中,一般都需要有原始数据录入或者叫做基础数据采集等功能模块。在以往传统的编程模式中,基本上可以说都是采用逐条数据录入,对应ＦＯＸ系统而言往往不是用ＡＰ－ＰＥＮＤ（如 ＡＰＰＥＮＤ ＢＬＡＮＫ与ＳＣＡＴ ＭＥＭＯＭＥＭＶ、 ＧＡＴＨ ＭＥＭＯ ＭＥＭＶ配合或者ＡＰＰＥＦＲＯＭ ＡＲＲＡ等等）就是用ＩＮＳＥＲＴ（如ＩＮＳＥＲＴＢＬＡＮＫ与ＳＣＡＴ ＭＥＭＯ ＭＥＭＶ、ＧＡＴＨ ＭＥＭＯＭＥＭＶ配合或者ＩＮＳＥＲＴ ＩＮＴＯ－ＳＱＬ）相关的命令来实现原始…     

BR车体强度计算的分析

在ＰＣ－３８６微型计算机上采用ＳＵＰＥＲＳＡＰ软件，对出口给博茨瓦纳的运盐敞车的强度计算进行了分析，给出了车体结构离散，约束处理，载荷处理及各计算工况的计算模型，经计算结果分析表明，ＢＲ车体在各工况载荷作用下，应力均未超过许用应力，满足《铁道车辆强度设计及试验鉴定规范》的要求。     

SYNTHESIS OF ELECTROPOLY MERIZABLE AND

ＳＹＮＴＨＥＳＩＳＯＦＥＬＥＣＴＲＯＰＯＬＹＭＥＲＩＺＡＢＬＥＡＮＤＥＬＥＣＴＲＯＡＣＴＩＶＥ４，４′┐ＢＩＰＹＲＩＤＩＮＩＵＭＳＡＬＴＳＺｈａｏＷｅｎｙｕａｎＭｅｎｇＸｉａｎｇｙｉｎｇＷａｎｇＹｉｊｕｎ（ＱｉｎｇｄａｏＵｎｉｖｅｒｓｉｔｙ，Ｄｅｐ...     

桃实生根系不同部位若干代谢指标的比较

桃实生根系不同部位若干代谢指标的比较于凤鸣，张立彬，刘玉艳，周艳芹（河北农业技术师范学院园艺系，昌黎，０６６６００）ＣＯＭＰＡＲ１５ＯＮＢＥＴＷＥＥＮＳＯＭＥＭＥＴＡＢＯＬＩＣＩＮＤＥＸＥＳＯＦＤＩＦＦＥＲＥＮＴＰＡＲＴＳＯＦＰＥＡＣＨＳＥＥＤＩＮＧ...     

EVA增容PVC／SBS共混体系的研究

本文通过冲击实验，拉伸实验，动态力学分析及扫描电镜的观察，研究了ＥＶＡ增容的ＰＶＣ／ＳＢＳ共混体系的形态结构的关系。研究结果表明，ＥＶＡ对ＰＶＣ／ＳＢＳ有良好的增容作用，并且与ＳＢＳ一起对ＰＶＣ有协同增韧效果。     

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