掺Sm、Pr的MnBl合金薄膜的磁性、结构和磁光性能研究

讨论了掺 Ｓｍ 、 Ｐｒ 的 Ｍｎ Ｂｉ 合金薄膜的结构、磁性和磁光性能实验表明,经过退火处理（３７５ ℃～４２５ ℃／２ ～４ｈ） ,样品形成 Ｍｎ Ｂｉ 晶体结构掺杂含量 ｘ ＝ ０ ．１ ～０ ．２５ ,样品具有较大的 Ｋｅｒｒ 角（θ Ｋｍａｘ ＝ ２ ．５７°） ,内禀矫顽力 Ｍ Ｈ Ｃ＝ １ ．５ ～５ ．６ ｋ Ｏｅ ,剩余磁化强度 Ｍｒ ＝ ３ ．０ ～５ ．６ ｋ Ｏｅ ,剩磁比ｒ ＝ ０ ．８８ ～０ ．９８磁光谱表明,随着掺杂含量的增大,样品 Ｋｅｒｒ 角的极大值向长波方向移动在变温过程中,样品的矫顽力随温度上升而增大,在薄膜（ ｄ ＜ ２５０ｎｍ ） 情况下矫顽力以形核机制为主     

7.5 mol% Nb:KTP晶体的主折射率温度系数的计算

阐述了７．５ｍｏｌ％Ｎｂ：ＫＴｉＯＰＯ４（Ｎｂ：ＫＴＰ）晶体在室温至１５０℃,波长分别为５３９．７５ｎｍ、６３２．８ｎｍ、１．０７９．５ｎｍ和１３４１．４ｎｍ下,主折射率温度系数的测量结果和计算结果,给出了计算７．５ｍｏｌ％Ｎｂ：ＫＴＰ晶体主折射率温度系数的两个表达式,分别用它们计算得该晶体的主折射率温度系数同实验测量值符合,最大偏差分别为１６．６％和１４％。通过比较ＫＴＰ和７．５％ｍｏｌ％Ｎｂ：ＫＴＰ晶体在这四个波长下主折射率温度系数可看出,两主折射率温度系数相当。     

二水甲酸钇晶体最佳相位匹配角的计算

本文给出了二水甲酸钇晶体折射率的Ｓｅｌｌｍｅｉｅｒ公式。计算了该晶体从１．０６４μｍ到０．６７４μｍ的各种基波波长的Ｉ型和Ⅱ型倍频相位匹配角以及相应的有效非线性系数，求出了最佳匹配角，描述了最佳匹配角的相对非线性系数随基波波长的变化规律。还进行了三倍频（１．０６４μｍ＋０．５３２μｍ→０．３５５μｍ）的最佳匹配角的计算。对该晶体进行了１型倍频实验，验证了相位匹配曲线，实验结果与计算结果吻合。     

CdI2与TSC加成物的合成及结构

ＣｄＩ２与ＴＳＣ在丙酮溶剂及水中形成加成物ＣｄＩ２（Ｃ４Ｈ１０Ｎ３Ｓ）２·Ｈ２Ｏ,晶体属单斜晶系,空间群为Ｐ２１／ｍ．晶胞参数为ａ＝０．７５３３（３）ｎｍ,ｂ＝１．５３５（２）ｎｍ,ｃ＝０．８４３７（２）ｎｍ,β＝９０．９１（３）°,ｖ＝０．９７６（１）ｎｍ３,Ｍｒ＝６４８．６４,Ｚ＝２,Ｄｃ＝２．２０ｇ·ｃｍ－３,μ（ＣｕＫα）＝４４．５８ｃｍ－１,Ｆ（０００）＝６０８,Ｔ＝２９７Ｋ．用１６２２个Ｉ≥３σ（Ｉ）独立衍射精修结构,最终偏差因子Ｒ＝０．０５７,晶体中存在分离的单核络合物ＣｄＩ２（Ｃ４Ｈ１０Ｎ３Ｓ）２·Ｈ２Ｏ,Ｃｄ原子呈畸变四面体配位．两个Ｃｄ－Ｉ和Ｃｄ－Ｓ键长分别为０．２７３０ｎｍ,０．２７４３ｎｍ和０．２５７５ｎｍ．     

内外螺旋三角翅片管管外冷凝传热建模与优化(Ⅱ)--数值分析与优化

为优化ＩＯＳＦ管的管外几何参数,根据所建数学物理模型,对不同换热工况和不同结构参数进行数值分析与模拟优化．研究结果表明：当管长Ｌ＝０．７ｍ、螺旋角β＝１８°、管外径Ｄｏ＝０．０１６ｍ,Ｈ＝０．００１ｍ时,φ＝７６°与Ｎ＝３２是最佳匹配参数,此时有最大平均冷凝换热系数;ＩＯＳＦ管管外螺旋角在β＜２７°的范围内,其管外传热特性与纵槽管基本相当;翅片夹角φ和螺旋槽头数Ｎ是对ＩＯＳＦ管管外冷凝换热产生主要影响的结构参数;局部冷凝换热系数沿管长跌落主要集中在开始的０．５ｍ内,因此排液盘的间距应不大于０．５ｍ,才能更有助于平均冷凝换热系数的提高     

顺式(QuinH)_4[Mo_2O_4(NCS)_6]的晶体和分子结构

在不同的温度条件下，我们制得了（ＱｕｉｎＨ）_４［Ｍｏ_２Ｏ_４（ＮＣＳ）_６］的同分异构体（Ⅰ）和（Ⅱ）（此中，（Ｑｕｉｎ）＝喹啉（Ｃ９Ｈ７Ｎ））．（Ⅰ）属单斜晶系，空间群Ｐ２１／ｂ；晶胞参数，ａ＝１０．９９１（１１）Ａ°，ｂ＝２１．３７０（８）Ａ，ｃ＝２０．４３４（６）Ａ°，γ＝９０．０１（５）°；Ｍｒ＝１１２５．０，ｄｍ＝１．５６ｇ／ｃｍ３，Ｚ＝４（ｄｃａｌｃ＝１．５５７ｇ／ｃｍ３）．（Ⅱ）属单斜晶系，空间群Ｐ２１／ｂ，晶胞参数：ａ＝１０．１９Ａ°，ｂ＝１５．２４Ａ°，Ｃ＝１６．３６Ａ°，γ＝１１１．５°Ｍｒ＝１１２５．０，ｄｍ＝１．６０５ｇ／ｃｍ３，Ｚ＝２（ｄｃａｌｃ＝１．５８０ｇ／ｃｍ３）．用ＭｏＫａ射线在Ｅｎｒａｆ　Ｎｏｎｉｕｓ　 ＣＡＤ－４四园衍射仪收集晶体（Ⅰ）的衍射数据．通过三维Ｐａｔｔｅｒｓｏｎ函数和Ｆｏｕｒｉｅｒ函数合成方法，确定了（Ⅰ）的晶体和分子结构．最后，根据 Ⅰ＞３σ（Ⅰ）的２９５６个独立衍射点的强度数据，用最小二乘法把结构精修到Ｒ＝０．０５７．（Ⅰ）的阴离子［ＭＯ２Ｏ４（ＮＣＳ）６］４－是双氧桥双核结构，由共棱（Ｏｂ－Ｏｂ）的一对扭曲八面体组成．分子具有接近Ｃ２Ｖ的对称性．Ｑｕｉｎ?     

POM: TNP混合晶体的结构

３－甲基－４－硝基吡啶－１－氧（ＰＯＭ）与２，４，６－三硝基苯酚（ＴＮＰ）的混合晶体从三氯甲烷溶液中生长获得，组成为１∶１，熔点８５℃．采用Ｘ射线衍射法测定ＰＯＭ∶ＴＮＰ混合晶体结构，属单斜晶系，空间群：ｐｎ，ａ＝０．６２４６（４）ｎｍ，ｂ＝１．６０５８（６）ｎｍ，ｃ＝１．５２２８（３）ｎｍ，β＝９５．６２（３）°，Ｖ＝１．５２０（２）ｎｍ３，Ｚ＝４，Ｄｃ＝１．６７ｇ／ｃｍ３，λ（ＭｏＫα）＝０．０７１０６９ｎｍ，μ＝１．４０ｃｍ－１，Ｆ（０００）＝７８４，Ｒ＝０．０５９．结果表明，该晶体中两个不同分子之间存在一个氢键     

N-(4-硝基苯)-(L)-脯氨醇的晶体结构

Ｎ－（４－硝基苯）－（Ｌ）－脯氨醇晶体属单斜晶系，空间群为Ｐ２１，单胞参数为：ａ＝０．５２４３（１）ｎｍ，ｂ＝１．４８６０（６）ｎｍ，ｃ＝０．７１６６（１）ｎｍ，β＝１０５．１６（１）°ｖ＝０．５３８８４（ｎｍ）～３，Ｚ＝２，Ｄｃ＝１．３７０ｇ·ｃｍ～（－３），Ｆ（０００）＝２３６，μ＝０．９ｃｍ～（－１）在ＡＦＣ—５Ｒ四圆衍射仪上用ＭｏＫα射线，收集了０＜２θ＜５５．ｌ°的独立衍射点１４５７个．晶体结构 利用Ｍｕｌｔａｎ程序找出大多数非氢原子的初始坐标．后由差值Ｆｏｕｒｉｅｒ合成找出其它非氢原子坐 标．经全矩阵最小二乘精修，最终偏离因子为Ｒ＝０．０６０，Ｒｗ＝０．０５６．     

Tb（Ⅲ）配合物[Tb（C18H20N2O4）（NO3）3]的合成和晶体结构

合成了配合物［Ｔｂ（Ｃ１８Ｈ２０Ｎ２Ｏ４）（ＮＯ３）３］,配体为２羟基３甲氧基苯甲醛与乙二胺缩合而成的双希夫碱．配合物晶体为单斜晶系,空间群Ｐ２１／ｎ,ａ＝１４１８６（３）ｎｍ,ｂ＝１１８４８（２）ｎｍ,ｃ＝１４６２６（３）ｎｍ,β＝１０４３５（３）°,Ｖ＝２３８２（１）ｎｍ３,Ｄｘ＝１８７２ｇ／ｃｍ３,Ｚ＝４,μ＝３０７５５ｍｍ－１,Ｆ（０００）＝１３２０,Ｒ＝００４７,Ｒｗ＝００５６．Ｔｂ（Ⅲ）的配位数为１０,配位几何构型为双帽四方反棱柱．所有配位原子都是氧原子．对该配合物进行了差热热重分析．     

KTN的核磁共振研究

研究了掺Ｎｂ浓度为０．１５的ＫＴＮ晶体中＾１８１Ｔａ和＾９３Ｎｂ的核磁共振信号的线宽和（积分）强度对温度的依赖性。通过两种核的信息分析，我们观察到在１２０Ｋ－２３０Ｋ之间晶体发生二次相变，而且发现两种核的共振线的展宽起源是不同的。我们也把＾１８１Ｔａ的信号与两种标定纯的ＫＴａＯ３晶体的相应信号作了比较，发现“消除”效应都存在。     

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