α_2－K_（10）As_2W_（17）O_（61）·20H_2O的合成与表征

采用分步降解法合成了２：１７钨砷酸钾杂多配合物．用元素分析，ＶＯ２＋光度滴定、紫外光谱、红外光谱、Ｘ－射线衍射、循环伏安、热重－差热分析对标题化合物进行了表征．实验结果表明，它具有一空缺α２型Ｄａｗｓｏｎ结构及不可逆的氧化还原性．较１：１１钨砷酸钾有更强的氧化性和比２：１８钨砷酸铵杂多配合物有稍高的热稳定性．     

［P_2W_（17）（TiO_2）O_（61）］~（8－）的合成及其钨─183核

本文报导了［Ｐ２Ｗ１７（ＴｉＯ２）Ｏ６１］８－杂多阴离子钾盐的合成，通过元素分析、ＩＲ．ＵＶ及核磁共振谱等对化合物进行了表征，确认钛取代的位置是Ｄａｗｓｏｎ结构的＂极位＂上。     

Dawson结构钨钛磷杂多配合物^183WNMR谱的研究

采用立体有择方法合成了具有Ｄａｗｓｏｎ结构的２种杂多酸盐，它们分别是：ａ２－Ｋ２「Ｐ２Ｗ１７ＴｉＯ６２」．５Ｈ２Ｏ和ａ－１，２，３－Ｋ１９Ｈ２「Ｐ２Ｗ１６Ｔｉ３Ｏ６２」．２Ｈ２Ｏ；并利用化学位移顺序对所合成的杂多配合物的＾１８３ＷＮＭＲ谱予于指认，确定了合成化合物的基本结构。     

Dawson结构稀土磷钼钨杂多化合物的合成及表征

用嵌入改性法合成了１０种通式为Ｋ１５Ｈ２［Ｌｎ（Ｐ２Ｗ１６ＭｏＯ６１）２］·ｎＨ２Ｏ,Ｌｎ＝（Ｌａ、Ｃｅ、Ｐｒ、Ｎｄ、Ｓｍ、Ｅｕ、Ｇｄ、Ｔｂ、Ｄｙ、Ｙｂ）的新型稀土杂多化合物,通过元素分析、ＩＲ和ＵＶ测定,证明所合成的１０种化合物同属于Ｄａｗｓｏｎ结构,利用ＴＧ－ＤＴＡ及变温ＩＲ技术考察了该系列化合物的热稳定性．     

钨砷系列杂多蓝的研究Ⅰ——Dawson结构钨砷稀土杂多蓝

利用控制电位电解的方法合成了８种未见文报道的Ｄａｗｓｏｎ结构的钨砷稀土杂多蓝：Ｌｎ２Ｈ２Ａｓ２Ｗ１８Ｏ６２·ｘＨ２Ｏ（２ｅ杂多蓝）和Ｌｎ２Ｈ４Ａｓ２Ｗ１８Ｏ６２·ｘＨ２Ｏ（４ｅ杂多蓝）,其中Ｌｎ＝Ｌａ,Ｃｅ,Ｐｒ,Ｎｄ。通过红外光谱,紫外光谱,极谱,光电子能谱、顺磁共振,热重－差热重对其进行了表征,并进行了结构和性质的研究。结果表明,还原前后杂多酸盐的结构虽有轻微的变化,但热稳定性和在溶液中的稳定     

过渡金属取代的钨磷杂多配合物的导电性及磁性

杂多化合物具有独特的结构和优异的性能，在催化、热稳定性、抗病毒等方面有广泛用途．我们曾报道了取代型钨像杂多化合物［１］以及钨硅杂多化合物［２］的导电性和磁性，在本文研究了取代型钨磷杂多配合物的导电性和磁性．过渡金属的钨磷配合物热稳定性好，导电能力强，且具有磁交换作用，是一类新型的有实用前景的无机分子功能材料．１实验部分 所用仪器为：Ｕ．Ｓ．Ａ ＢＩＯ－ＲＡＤ ＦＩＳ－７， Ｌｅｅｍａｎ　ＩＣＰ发射光谱仪，ＣＡＨＮ—２０００磁天平（美国ＣＨＡＮ公司），ＥＲ ２００—Ｄ—ＳＲＣ １０／１２电子顺磁共振仪（…     

杂多酸荷移跃迁盐系列研究（Ⅱ）：Dawson—Wells结构杂多酸的荷移跃迁盐…

合成了三种通式为（ＥＴ）１１「Ｐ２Ｍ１８Ｏ６２」，的Ｄａｗｓｏｎ－Ｗｅｌｌｓ结构杂多荷移跃迁盐。用元素分析，ＩＲ，Ｕｖ－ｖｉｓ，＾３１Ｐ ＮＭＲ，ＥＰＲ，磁化率和电导率等物理２测试手段进行了表征和性质研究，显示具有不同的磁行为。     

Dawson结构钼钒磷杂多化合物的性质

合成了具有Ｄａｗｓｏｎ结构的钼钒磷杂多酸，并将其转变为相应的十六烷基吡啶盐，利用ＩＲ，ＣＶ，３１ＰＮＭＲ，ＵＶ等手段进行表征．讨论了钒取代后杂多化合物的结构特征．     

Dawson结构钨钛砷三元杂多酸配合物的合成与表征

首次合成了具有Dawson结构的钨钛砷三元混配杂多配合物。用元素分析和热重分析确定了杂多配合物的组成为K_8[As_2W_(17)TiO_(62)]·10H_2O。采用X—射线衍射、红外光谱、紫外光谱、循环伏安、差热等方法系统地研究了它的结构和光谱性质、氧化还原性和热稳定性,结果表明,Dawson结构钨钛砷杂多配合物较K_(10)As_2W_(17)O_(61)·20H_2O杂多配合物有强的氧化性和热稳定性性。     

Dawson结构钨砷酸电荷转移配合物的合成与性质研究

以２∶１８钨砷酸为电子受体、喹啉（Ｃ９Ｈ７Ｎ）和８－羟基喹啉（Ｃ９Ｈ７ＯＮ）为电子给体合成了两种新型电荷转移配合物（Ｃ９Ｈ７ＮＨ）６［Ａｓ２Ｗ１８Ｏ６２］·Ｃ９Ｈ７Ｎ·３Ｈ２Ｏ（１）、（Ｃ９Ｈ７ＯＮＨ）６［Ａｓ２Ｗ１８Ｏ６２］·７Ｈ２Ｏ（２）．用元素分析、红外光谱、固体电子光谱、Ｘ射线粉末衍射、电子自旋共振以及循环伏安对它们进行了表征．结果表明：配合物（１）具有光致变色性质而８－羟基喹啉配合物（２）则不具有此性质．［Ａｓ２Ｗ１８Ｏ６２］６－在非质子介质（ＤＭＦ）中经历两步单电子可逆还原和两步单电子不可逆还原．     

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