2，6-双（3，5-二甲基吡唑基）吡啶稀土配合物的合成与荧光性质

在乙醇和水溶液中分别合成了Eu^3＋、Tb^2＋与2，6-双（3，5-二甲基吡唑基）吡啶的两种配合物，并时其进行了紫外光谱、荧光光谱等测试．结果表明，生成的配合物具有较好的荧光特性，在相同溶剂条件下，Eu^3＋配合物的荧光性能比Tb^3＋配合物的强．Eu^3＋、Tb^3＋配合物在乙醇中的荧光强度都比在水中的好．     

N，N，N-三（2-甲基苯并咪唑）胺及其稀土配合物的合成与荧光性质研究

为了考察三脚架配体及其稀土配合物的配住形式和性质，从而为进一步研究其荧光性质、生物活性提供依据，以氨三乙酸为母体合成了N，N，N-三（2-甲基苯并咪唑）胺及其稀土配合物（La^3＋，Sm^3＋，Y^3＋,Tb^3＋,Ce^3＋，Eu^3＋）．通过红外、核磁共振、差热-热重、紫外及荧光等分析手段研究了配体及其配合物的结构关系和荧光性质．研究表明。谊类配体是较好的主体分子。能够与稀土离子发生配位，形成配合物，配合物内界的NO3^-以双齿形式与中心离子配位；配合物热稳定性好，具有较好的荧光性质，特别是Tb^3＋配合物是高效的稀土有机发光配合物，可用于荧光材料的研究．     

铕-钆-聚N-乙烯基乙酰胺共发光体系的光学性能

在乙醇溶液中合成了掺杂Gd^2 的铕-聚N-乙烯基乙酰胺(PNVA)的配合物．测定并研究了配合物的红外光谱、紫外光谱和荧光光谱．结果表明：配合物的最佳激发波长为262nm；在此波长激发下配合物发出较强的荧光，不发光的Gd^3 离子对Eu^3 离子的发光有一定的增强作用，而不发光稀土Gd件离子对Eu^3 离子的发射峰位影响不大.     

二苯并四氧二氮环醚及其稀土配合物合成与荧光性质研究

合成了二十员大环双氮杂冠醚：2，3，l6，l7—二苯—l，8，ll，18—四氧—5，14—二氮杂环二十烷及其7个与稀土硝酸盐(RE^3 ＝La^3 ，Sm^3 ，Eu^3 ，Gd^3 ，Tb^3 ，Dy^3 。Yb^3 )所形成的1：2(M：L)型固体配合物，并经过红外光谱、元素分析、摩尔电导及热分析等方法对配合物进行了表征．结果表明，配位是通过配体中的C—O-C进行的，而Ar—O-C未参与配位，同时含2分子配位水．对Sm(Ⅲ)，Eu(Ⅲ)，Tb(Ⅲ)，Dy(Ⅲ)的配合物进行了荧光光谱测定，所有配合物均有较强的荧光强度，其中Tb(Ⅲ)的配合物荧光强度最高，表明该新双氮杂冠醚配体三重态的能量与Tb(Ⅲ)的振动能级最为匹配．     

SrBPO5中铕和铽的发光

利用Eu^3 和Tb^3 的电子组态具有共轭性的原理，在空气中合成了SrBPO5:Eu,Tb荧光体系，研究了其光谱特征，发现Eu^3 和Eu^2 共存于该体系中，且Eu^2 的发光强度随Tb^3 离子浓度的增大而增强。     

纳米稀土(Eu~(3+),Tb~(3+))三元配合物的制备和荧光性质

为了探索形貌和尺寸对配合物荧光性质的影响,以聚（乙烯基吡咯烷酮）为表面活性剂,制备了两种纳米稀土三元配合物[Eu（BA）3phen和Tb（acac）3phen]．采用元素分析、透射电镜、红外吸收光谱、紫外-可见吸收光谱、X射线粉末衍射及X射线光电子能谱对所制备的纳米配合物进行表征．结果表明,所制备的配合物为纳米颗粒,聚（乙烯基吡咯烷酮）的存在能有效地抑制配合物团聚而形成大的颗粒．对纳米稀土配合物的荧光性质研究发现,在紫外光激发下,这两种纳米配合物能分别发射Eu^3＋和Tb^3＋离子的特征荧光,而且纳米配合物的荧光性能优于相应的普通配合物．     

苯甲酸稀土甲基亚砜配合物的合成与光致发光

以苯甲酸为第一配体，甲基亚砜为第二配体，合成稀土苯甲酸的二元，三元配合物．室温下测定荧光，结果表明铕，铽的二元、三元固体配合物均有强荧光，铕的三元配合物的荧光可比强度是Eu2O3的120倍，铽的三元配合物的荧光可比强度是Tb4O7中Tb^3 的4422倍．     

三足配体及其稀土配合物的合成与荧光性质研究

合成了以N为中心的三足体配体1，1′，1“-Z(N-乙基苯胺甲酰基)三甲基胺及其稀土苦味酸盐配合物，对配合物进行了红外、元素分析和摩尔电导分析，配体与苦味酸铕形成配合物的荧光光谱表现出Eu^3 的特征光谱．     

可见光激发铽配合物的荧光光谱

用波长为532nm的可见激光对铽离子（Tb^3 )的3种不同配合物的荧光光谱进行了实验研究。分析了讨论了它们的荧光谱线特性、配体对荧光谱线的影响以及上转换荧光形成的机制。     

1,4-双（3,5-二甲基-吡唑）屈嗪合成及表征——兼论稀土Eu^3＋、Tb^3＋配合物液体荧光性质

该文以1,4-双肼屈嗪和乙酰丙酮为原料分别采用微波、常规法经过环合化反应合成了一种新的双吡唑配体：1,4-双（3,5-二甲基-吡唑）屈嗪,其中微波法产率为59%,常规法产率为63%.通过红外光谱、核磁共振谱和质谱对其结构进行了表征,并对稀土离子Eu^3＋、Tb^3＋配合物在不同有机溶剂中的荧光光谱进行了测定和对比.     

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.     

Design and analysis of generic LBS application developing platform

Location based services is promising due to its novel working style and contents.A software platform is proposed to provide application programs of typical location based services and support new applications developing efficiently. The analysis shows that this scheme is easy implemented, low cost and adapt to all kinds of mobile nework system.     

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