氮化铝(AIN)薄膜的光学特性研究

研究了宽禁带Ⅲ－Ｖ族化合物半导体氮化铝（ＡＩＮ）薄膜的折射率及其热光特性,采用棱镜──薄膜耦合装置和自动温控光波导测试仪,测出不同温度下氮化铝薄膜的波导特性,利用迭代法可得到ＡＩＮ的折射率与温度变化的关系,并首次测得了ＡＩＮ薄膜的热光特性。     

氮化铝（AlN）薄膜的光学特性研究

研究了宽禁带Ⅲ－Ⅴ族化合物半导体氮化铝（Ａ１Ｎ）薄膜的折射率及其热光特性,采用棱镜－－薄膜硝装置和自动温控光波导测试仪,测出不同温度不氮化铝薄膜的波导特性,利用迭代法可得到Ａ１Ｎ的折射率与温度变化的关系,并首次没得了Ａ１Ｎ薄膜的热光特性。     

一种新型表面磁光克尔效应测量系统

研制了一种新型的科研教学两用的表面磁光克尔效应测量系统,给出了该测量系统的设计方案、结构、技术性能、实验原理及使用方法.该测量系统可用于磁光器件、磁性薄膜及不同材料多层磁性薄膜特性参数的测量.     

二氧化锡薄膜结构对光学气敏特性的影响

研究了ＳｎＯ４薄膜的光学特性及有关光学参数的推导，建立了光学气敏的数学模型。较详细地研究了不同结构的ＳｎＯ２薄膜接触还原性气体后光透射率的变化。     

测量薄膜参数的新型精密仪器PW—Ⅱ型光波导测试仪

“PW—Ⅱ型光波导测试仪”是我国首次研制成功的测量厚膜参数的新型精密仪器。文章介绍了该仪器的测量原理和结构特点。对仪器的测量精度进行了理论分析和数学推导,并采取了相应的技术措施,给出了精确的实测计算结果:薄膜折射率测量精度的绝对值≤1×10~(-4);薄膜厚度测量精度的绝对值≤1×10~(-2)μm。该仪器还可以用来精确测量薄膜的损耗,并能用于各向异性薄膜特性参数的测试与研究。     

成膜条件对TiO_2显微结构与光媒特性的影响

用有机金属化学气相沉淀(MOCVD)与溶胶 凝胶(sol gel)法制备二氧化钛薄膜·通过XRD,FE SEM,AFM以及光照TiO2薄膜来降解橙色Ⅱ溶液的方法,研究了TiO2膜的晶体结构、微观表面特性与形貌以及薄膜的光媒特性·比较了不同的TiO2薄膜形成条件对晶格特性与光媒活度的影响·结果表明,成膜温度对薄膜的微观结构及晶体学特性有很大影响;用MOCVD方法得到的TiO2膜,其光媒活度明显高于用sol gel法得到的TiO2膜·     

二氧化锡薄膜结构对光学气敏特性的影响￣①

研究了ＳｎＯ２薄膜的光学特性及有关光学参数的推导，建立了光学气敏的数学模型。较详细地研究了不同结构的ＳｎＯ２薄膜接触还原性气体后光透射率的变化，采用不同方法制备的ＳｎＯ２薄膜，由于结构不同，光透射率不一样，利用计算机对光学气敏的数学模型进行摸拟计算，其结果能很好地解释上述的现象。     

富氮SiOxNy膜的电子注入特性

通过施加直流电压于P型SiOxNy薄膜，使热电子注入到薄膜而引起薄膜电学参数的改变。测试了薄膜在电子注入前后电学参数的变化，以研究薄膜的电子注入特性，探求薄膜的抗电子注入能力与制备工艺之间的关系。结合俄歇电子能谱和红外光谱分析膜的微机结构，对薄膜的电子注入特性进行了理论分析与讨论。     

a—Si1—xNx：H光敏材料的研究

讨论了用射频辉光放电装置制备的掺氮非晶硅光敏薄膜材料的光电特性。结果表明，合理地控制氮气（Ｎ２）与硅烷（ＳｉＨ４）气体的流量比例以及其他有关的工艺参数，能够制备出暗电阻率，光、暗电导率比，光电性能稳定的ａ－Ｓｉ１－ｘＮｘ：Ｈ光敏薄膜材料。     

SmCo磁性薄膜的显微结构和高温效应

本文用透射电子显微镜(TEM)和扫描电子显微镜(SEM)研究了用双源共蒸发法制备的SmCo磁性薄膜的显微结构特征及其与成分和温度的关系,讨论了非晶态SmCo磁性薄膜的形成过程及其显微结构对薄膜磁光特性的影响.     

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