应变栅结构参数对合金薄膜传感器应变传递的影响

应变栅作为薄膜传感器的关键组成部分,其结构参数直接影响着合金薄膜传感器中应变传递效果。基于剪滞理论研究了应变栅的结构参数对应变传递误差的影响,并推导了合金薄膜应变片的应变传递函数;采用有限元软件模拟仿真了薄膜电阻应变片应变栅栅厚在0.001～0.02 mm、栅长在20～50 mm以及栅宽在0.1～0.4 mm范围内对应变传递的影响,并对上述分析的结果进行了实验验证。结果表明：在选定的范围内,应变栅厚度越小、纵栅长度越长、纵栅宽度越窄,应变传递误差越小;各结构参数对应变传递的影响程度为：栅宽>栅长>栅厚;当栅厚为0.001 mm、栅长为3 mm、栅宽为0.1 mm时,应变传递误差最小为3.4%。     

快速热氮化改善n-MOSFET栅氧化层的加速击穿

研究不同类型、不同沟道长度的ｎ沟金属－氧化物－半导体场效应晶体管（ＭＯＳＦＥＴ）在不同栅电压下工作时栅氧化层的击穿特性。结果表明，ＭＯＳＦＥＴ栅氧化层的加速击穿起因于沟道大电流，而栅氧化层进行快速热氮化可极大地改善其栅氧化层的击穿特性。     

快速热氮化改善n—MOSFET氧化层的加速击穿

研究不同类型，不同沟道长的ｎ沟金属－氧化物－半导体场效应晶体管在不同栅电压下工作时栅氧化层的击穿特性。结果表明，ＭＯＳＦＥＴ栅氧化层的加速击穿起因于沟道大电流，而栅氧化层进行快速热氮化可极大地改善其栅氧化层的击穿特性。     

Au／MoO3和Pt／MoO3薄膜光致变色反应的研究

报道了金属Ａｕ或Ｐｔ与ＭｏＯ３薄膜形成的肖特基结对ＭｏＯ３薄膜光致变色的增幅作用。纯粹的ＭｏＯ３薄膜只对紫外光有响应，但经过阴极极化处理后，薄膜就有产生可见光变色效应。为了提高变色效率，在薄膜表面蒸镀一层金属Ａｕ（或Ｐｔ），ＭｏＯ３薄膜的紫外和可见光致变色能力都有大幅度提高。这可用金属Ａｕ或Ｐｔ与ＭｏＯ３之间形成的特殊结构－肖特基结来解释。Ｐｔ与ＭｏＯ３的Ｆｅｒｍｉ能级差大于Ａｕ与ＭｏＯ３的Ｆｅｒ     

聚酰亚胺薄膜电容栅FET湿度传感器的研制

一种聚酰胺（ＰＩ）薄膜电容栅ＦＥＴ微型湿度传感器已经初步研制成功。这是一个ｎ沟道壁强型器件，具有曲折栅结构，沟道长约１０μｍ，宽〉８０００μｍ；栅区绝缘层厚约３３０００Ａ（ＳｉＯ２＋Ｓｉ３Ｎ４）；一个ＡｕＰＩ－Ａｌ纵向湿敏电容覆植于绝缘栅上，本文叙述了该ＰＩ－ＨＵＭＦＥＴ的结构设计，工作原理和主要性能，对某些有关问题进行了初步讨论。     

难熔金属及硅化物薄膜制备技术研究

本文对难熔金属及其硅化物的形成，特性进行了研究。主要对难熔金属Ｍｏ、难熔金属硅化物ＴｉＳｉ，ＰｔＳｉ２等进行了探讨，采用溅射难熔金属，热硅化反应的手段，对解决ＶＬＳＩ工艺的某些问题，如：解决由于ＭＯＳ电路图形尺寸缩小带来的栅电阻增大的问题以及采用硅化物－阻挡层－Ａｌ多层金属布线，解决欧姆接触和铝的电迁移问题起了极好的作用。     

金属—铁电薄膜—半导体结构的电容—电压特性理论分析

用半导体理论讨论了金属－铁电薄膜－半导体（ＭＦＳ）结构的电容－电压（Ｃ－Ｖ）特性，其结果表明：在ｎ型Ｓｉ基片上，理想ＭＦＳ的Ｃ－Ｖ曲线为逆时针回滞，有载流子注入的ＭＦＳ结构的Ｃ－Ｖ曲线为顺时针回滞，这与实验结果是一致的。     

MgF_2薄膜器件的结构、导电和发光

通过蒸镀ＭｇＦ２薄膜制作了一种可均匀发射可见光的新型金属一绝缘体一金属结型发光器件。论证了它的内层结构、导电机理及其发光的物理图象：Ｓｃｈｏｔｔｋｙ热电子在Ａｕ－真空界面激发表面等离极化激元（ＳＰＰ）；Ａｕ－真空界面的ＳＰＰ通过表面粗糙度与外光子耦合。这一图象与该器件的电流－电压（Ｉ－Ｖ）、电流－温度（Ｉ－Ｔ）关系及其发射光谱的主要特征一致。     

成果推广

电阻应变式纳米膜压力传感器该产品是基于金属应变原理而制成 ,其敏感元件是金属弹性体上的多层纳米膜结构 .弹性体采用经处理的金属圆形平膜片 ,在精密抛光的膜片上制作纳米固体Ta2 O5 薄膜离层 ,然后 ,在其上再制作纳米量能的Ni-Cr薄膜功能材料 ,通过微细加工技术构成惠斯登电桥 ,电桥电阻用纳米SiO2 膜钝化保护 ,应变信号用金丝引出 .当被测压力用膜片上时 ,膜片立即产生弹性形变 ,应变电阻发生变化 ,电桥失去平衡 ,从而产生与被测压力成正比的电压信号 ,以实现对被测压力的准确测量 .该产品采用甚低能离子加速器轰击的动能转换搬迁原…     

金属薄膜裂纹扩展的分子动力学研究

研究了冲击载荷作用下金属薄膜表面裂纹扩展的微观机制,采用分子动力学方法对Cu薄膜进行模拟计算,求得冲击载荷作用下带有表面裂纹模型的系统动能、应力、应变及微观结构变化图.当系统从压应力转变为拉应力状态时,裂纹上的原子获得较大动能,裂纹尖端原子开始发生溅射,继而晶格内部出现空位.当拉应力达到364385MPa时,空位扩大形成裂尖钝劈现象,裂纹发生扩展.结果表明:在高速冲击载荷作用下,金属薄膜裂纹扩展主要原因是系统能量和应力的变化使得微裂纹尖端出现钝劈损伤.     

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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