不同Nb,Mo含量的Fe基微晶软磁合金磁性能的频谱特性

利用无磁场、纵向磁场和横向磁场３种热处理方式，制力求４种不同Ｎｂ、Ｍｏ含量的Ｆｅ７４．５Ｃｕ１Ｍ３Ｓｉ１２．５Ｂ９．５（Ｍ为Ｎｂ、Ｍｏ原子质量百分数之和）纳米晶试样，分别测量试样的复值磁导率｜μ｜Ｏ．３，矫顽力｜Ｈｃ｜和铁芯损耗Ｐｃｏ．２，分析试样的频谱特性和成分的影响．结果表明，不含Ｍｏ的Ｆｅ７４．５Ｃｕ１Ｎｂ３Ｓｉ１２．５Ｂ９．５合金的｜μ｜０．３随频率增加而下降的趋势最小，需含Ｍｏ的Ｆｅ７４．５Ｃｕ１Ｎｂ２Ｍｏ１Ｓｉ１２．５Ｂ９．５合金的｜μ｜Ｏ．３值最大，且｜Ｈ｜和Ｐｃｏ．２的值最小．在３种磁场热处理中，无磁场热处理后的试样的｜μ｜０．３最大，且｜Ｈｃ｜和Ｐｃｏ．２的值最小；而纵向磁场热处理后的试样的｜μ｜０３最小，且｜Ｈｃ｜和Ｐｃ０２的值最大     

中、低角区煤的X射线衍射特点初探

本文首次较为系统地研究了不同变质程度的煤，在低角区和中角区的Ｘ射线衍射特点。指出随着变质程度的提高，１６×１０－（１０）ｍ峰和（００２）峰强度逐渐增高，而γ带强度降低，低变质煤未见１６×１０－（１０）ｍ峰，高变质煤中γ带不明显；随着变质程度提高，１６×１０－（１０）ｍ峰、γ带峰、（００２）峰的晶面间距均减小，１６×１０－（１０）ｍ峰减小幅度较大，（００２）峰减小幅度较少。基于以上分析，对其形成机理进行了初步探讨。图６，参７。     

红外光谱定理分析煤中脂肪碳和芳香碳

利用FT－IR光谱分析和合适的光谱分峰程序，把煤的红外吸收光谱分解为38个Gaussian分布的峰，基于煤中芳香－CH和脂肪－CH的振动对红外光谱的吸收贡献，对我国煤化程度显著差异的18种煤的红外光谱进行研究，确定了煤中的芳香－CH和脂肪－CH含量，获得了我国煤的结构参数，实验表明煤的Har/Hal和芳香度（fa)与煤化程度的有关，碳含量85％是煤的特征值。     

鸡西煤化学结构的演化

采用Ｘ射线衍射、红外光谱等手段对鸡西煤不同煤化作用阶段煤结构演化进行了研究．Ｘ射线衍射分析显示，随着煤化程度增加，反映芳香核大小的Ｌｃ和Ｌａ都逐渐增加，而芳香层间距ｄ００２逐渐减小；红外光谱分析显示，不同变质程度煤中都含有芳烃，随着煤化程度加深，芳香核的缩合程度增加，醇、酚、羟基等侧链基团的吸收峰逐渐减弱．     

脆、韧性变形构造煤的激光Raman光谱特征及结构成分响应

对淮北煤田不同类型构造煤进行了激光Raman光谱分析,探讨了不同变形机制下构造煤结构成分的变化特征．结果表明,各类构造煤均存在两个主要的Raman振动区域（G峰和D峰）,分别位于1590．3-1600．1cm^-1和1340．3—1356．9cm^-1,脆、韧性变形构造煤随着变质和变形程度的增加,表现出明显不同的光谱特征．脆性变形构造煤,随着变质、变形程度增加,光谱特征峰明显增强,D峰峰位向低波数偏移;韧性变形构造煤（糜棱煤）的特征峰则随之减弱,D峰峰位向高波数偏移;脆韧性变形构造煤则先类似于脆性变形、而后表现为韧性变形的变化特征．进而从分子水平上,探讨了造成脆性变形与韧性变形构造煤激光Raman光谱不同变化特征的原因．     

岱河煤矿煤-天然焦结构X射线衍射特征分析

为了正确划分煤与天然焦，进行合理的储量计算，采用X射线衍射方法，对岱河煤矿煤与天然焦系列样品进行了测试，根据测试结果利用布拉格方程和谢乐公式计算了d（002）、Lc、La等煤结构参数。结果表明：①随着煤向天然焦的转变，其d（002）Lc、La等值增大；②煤与天然焦在结构参数上存在明显分界：③随着煤变质程度的增加，（002）衍射峰向高角度方向偏移，峰形由低矮变为高耸。研究结果为煤、焦分采设计及煤炭资源的合理利用提供了科学依据。     

陕南地区中煤阶煤分子结构演化特征

为研究陕南地区中煤阶煤结构中官能团的变化,以北秦岭商洛煤产地和上扬子镇巴煤产地的8个中等变质程度煤样为研究对象,采用X射线衍射和傅里叶红外光谱对煤结构进行表征,结合分峰拟合来获取官能团的相对含量及结构参数。结果表明：随着镜质体反射率增大,芳环层面网间距逐渐减小,堆砌度与延展度逐渐增大,芳香度在反射率为1.30%时出现拐点;中煤阶煤芳香结构中苯环取代方式以三取代和二取代为主,随着变质程度的增高,苯环二取代的比例升高,脂肪族结构逐渐脱落导致相对比例降低,含氧官能团的吸收峰强度逐渐减弱,其中在反射率为1.3%时羰基相对含量最低;自缔合羟基、醚氧羟基和环羟基的相对含量均呈先减小后增大的趋势,煤分子结构中链状结构的环化使环状羟基相对含量在反射率为1.30%后增大,环化作用增强导致甲基含量减少,分子结构空间排列紧密,自缔合羟基相对含量增加;红外结构参数芳碳率、芳香性、芳香环缩聚程度和CH₂/CH₃等随反射率的增大而增大,成熟度的变化与醚氧或酚羟基的转化相关。总体上芳香结构相对含量增大,脂族结构减少,缩聚程度增加,生烃潜力随反射率增大,反映煤结构的生烃潜力...     

煤官能团对煤自燃倾向性的影响

为防治矿井自然发火,剖析煤的自燃倾向性,利用交叉温度点法和红外光谱图分峰拟合分析煤自燃倾向性和官能团内在的联系;通过气相色谱-程序升温、红外光谱等实验,得出当煤自燃综合判定指数I数值越大时,煤自燃倾向性越小;煤中芳香烃-C=C-官能团含量增加,含氧官能团-COOH、-OH含量减少时,煤变质程度在加深,煤的自燃倾向性能力减弱。     

关于定常Stokes绕流的悖论

证明了定常Ｓｔｏｋｅｓ绕流ｖ≡０，即Ｓｔｏｋｅｓ悖论，如果相应的Ｄｉｒｉｃｈｌｅｔ积分有限，或者，当｜ｘ｜→∞时，｜ｖ（ｘ）｜＝Ｏ（ｌｎα｜ｘ｜）（α≥０，ｎ＝２），｜ｖ（ｘ）｜＝Ｏ（｜ｘ｜２－ｎ）（ｎ＞２）．     

3－羟基－2－丁酮、二丙酮醇在几种溶剂中的红外光谱研究

本文测定了３－羟基－２．丁酮（ａｃｅｔｏｉｎ）、二丙酮醇（ＤＡ）在四氯化碳、正庚烷、苯和１，２－二氯乙烷等中的红外光谱（３８００—３１００ｃｍ￣（－１））．根据谱峰的强度和峰位的变化，证实了ａｃｅｔｏｉｎ在溶液中能形成较稳定的五元环分子内缔合体，二丙酮醇可形成六元环分子内缔合体．另外，对甲醇、正了醇与ａｃｅｔｏｉｎ在四氯化碳中相互作用的红外光谱也进行了研究，结果表明，ａｃｅｔｏｉｎ分子中羰基和羟基的相互作用，使得自由基的吸收峰移向低频（△γ＝２０ｃｍ￣（－１）），同时羰基醇中羰基接受质子的能力亦被增强．     

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.     

An Analysis of Catherine＇s Character——Wuthering Heights

Wuthering Heights, Emily Bronte＇s only novel, was published in December of 1847 under the pseudonym Ellis Bell. The book did not gain immediate success, but it is now thought one of the finest novels in the English language. Catherine is the key character of this masterpiece, because everybody and everything center on her though she had a short life. We can understand this masterpiece better if we know Catherine well.     

Lower Paleozoic oil relationships within Williston Basin, Canada

The Williston Basin is a significant petroleum province, containing oil production zones that include the Middle Cambrian to Lower Ordovician, Upper Ordovician, Middle Devonian, Upper Devonian and Mississippian and within the Jurassic and Cretaceous. The oils of the Williston Basin exhibit a wide range of geochemical characteristics defined as "oil families", although the geochemical signature of the Cambrian Deadwood Formation and Lower Ordovician Winnipeg reservoired oils does not match any "oil family". Despite their close stratigraphic proximity, it is evident that the oils of the Lower Palaeozoic within the Williston Basin are distinct. This suggests the presence of a new "oil family" within the Williston Basin. Diagnostic geochemical signatures occur in the gasoline range chromatograms, within saturate fraction gas chromatograms and biomarker fingerprints. However, some of the established criteria and cross-plots that are currently used to segregate oils into distinct genetic families within the basin do not always meet with success, particularly when applied to the Lower Palaeozoic oils of the Deadwood and Winnipeg Formation.     

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