亚砜类萃取剂萃取铀(Ⅵ)的研究

研究了在稀释剂甲苯中石油亚砜（ＰＳＯ）、二正辛基亚砜（ＤＯＳＯ）、二（２－乙基己基）亚砜（ＤＥＨＳＯ）、十二烷基对甲苯基亚砜（ＤＴＳＯ）、２－乙基己基对甲苯基亚砜（ＥＨＴＳＯ）、二苯基亚砜（ＤＰＳＯ）等亚砜类化合物对铀（Ⅵ）的萃取,其萃取能力按ＰＳＯ＞ＤＯＳＯ＞ＤＥＨＳＯ＞ＤＴＳＯ＞ＥＨＴＳＯ＞ＤＰＳＯ的顺序变化．求出了萃取反应的焓变,考察了硝酸浓度、萃取剂浓度、盐析剂浓度、络合阴离子（Ｃ２Ｏ２－４）浓度、温度对萃取平衡的影响．     

二安替比林烷氧基苯基甲烷的合成及与铬(Ⅵ)显色反应的研究(英文)

合成并鉴定了５个二安替比林烷氧基苯基甲烷新试剂：二安替比林邻甲氧基苯基甲烷（ＤＡｏＭＭ）,二安替比林对甲氧基苯基甲烷（ＤＡｐＭＭ）,二安替比林邻乙氧基苯基甲烷（ＤＡｐＥＭ）,二安替比林间乙氧基苯基甲烷（ＤＡｍＥＭ）,二安替比林对乙氧基苯基甲烷（ＤＡｐＥＭ）,研究了在磷酸介质中它们与铬（Ⅵ）的显色反应,建立了５个测定铬（Ⅵ）的新方法．摩尔吸光系数在２．４×１０５Ｌ·ｍｏｌ－１·ｃｍ－１～１．６×１０６Ｌ·ｍｏｌ－１·ｃｍ－１之间,这些体系用在废水中铬的测定,结果满意     

1—苯基—3—甲基—4—（α—呋喃甲酰基）—5—吡唑酮与中性萃取剂协同萃取钇（Ⅲ）的研究

本文研究了１－苯基－３－甲基－４－（α－呋喃甲酰基）－５－吡唑酮（ＨＡ）单独萃取Ｙ（Ⅲ）及其与二苯亚砜（ＤＰＳＯ），磷酸三丁酯（ＴＢＰ）或三辛基氧膦（ＴＯＰＯ）协同萃取Ｙ（Ⅲ）的行为。确定了萃合物的组成分别为ＹＡ＿３，ＹＡ＿３·ＤＰＳＯ，ＹＡ＿３·ＴＢＰ和ＹＡ＿２（ＮＯ＿３）·２ＴＯＰＯ．算得萃取平衡常数分别为：ｌｏｇＫ＿（Ａ（ＨＡ））＝－６．８６，１ｏｇＫ＿（ＡＢ（ＨＡ＋ＤＰＳＯ））＝－３．８９，ｌｏｇＫ＿（ＡＢ（ＨＡ＋ＴＢＰ））＝－２．５３和ｌｏｇＫ＿（ＡＢ（ＨＡ＋ＴＯＰＯ））＝５．１３．     

PDS的合成及其对聚合烯耐辐射性能的影响

使用不同配比的４－（甲基丙烯酸）－２，２，６，６－四甲基哌啶醇酯和苯乙烯，改变引发剂ＡＩＢＮ的用量，合成了一系列具有不同单体配比和相对分子质量的ＴＭＰＭ和共聚物（ＰＤＳ），研究了它们对聚丙烯耐γ辐射性能的影响。当ＴＭＰＭ和Ｓｔ的质量比为２：１￣１：２，引发剂的用量占单体总质量的０．５％￣１％时，合成的ＰＤＳ作为光稳定剂添加到聚丙烯中后，聚丙烯的耐辐射性能最好。     

有机过氧化物与药物体系引发烯类聚合反应的热效应

研究了有机过氧化物（ＢＰＯ）分别与含叔胺基结构的药物（如利福中，奋乃静，水杨酸毒扁豆碱，硝酸毛果芸香碱）组成的引发体系，在４０℃的温度下引发甲基丙烯酸β羟乙酯（ＨＥＭＡ）聚合的放热过程，并与纯ＢＰＯ、ＢＰＯ－ＤＭＴ体系引发ＨＥＭＡ聚合的放热过程比较．实验表明：（１）有机过氧化物与药物引发体系的引发机理与氧化还原引发体系的引发机理相似，其引发活性比ＢＰＯ－ＤＭＴ体系的低．（２）有机过氧化物与药物引发体系，能在４０℃温度下引发ＨＥＭＡ聚合成型，聚合过程放热较为平稳     

有机过氧化物与药物体系引发烯烃聚合反应与热效应

研究了有机过氧化物（ＢＰＯ）分别与含叔胺基结构的药物（如利福中，奋乃静，水杨酸毒扁豆碱，硝酸毛果芸香碱）组成的引发体系，在４０℃的温度下引发甲基丙烯酸β羟乙酯（ＨＥＭＡ）聚合的放热过程，并与纯ＢＰＯ、ＢＰＯ－ＤＭＴ体系引发ＨＥＭＡ聚合的放热过程比较。实验表明：（１）有机过氧化物与药物引发体系的引发机理与氧化还原引发体系的引发机理相似，其引发活性比ＢＰＯ－ＤＭＴ体系的低。（２）有机过氧化物与药物引发     

环状碘鎓盐光引发体系的研究

合成了３种环状碘鎓盐，表征了它们的紫外吸收光谱特征，研究了碘盐－酮－胺三元引发体系引发丙烯酸？－羟乙酯（ＨＥＡ）－三羟甲基丙烷三丙烯酸酯（ＴＭＰＴＡ）的自由基聚合，结果表明，向酮－胺体系中加入环状碘盐可大大加快聚合速度。根据实验结果，推出了光引发机理。     

THE CURRENT DENSITY DEPENDENCE OF ACTIVATION ENERGY IN HIGH－Tc SUPERCONDUCTOR HgBa_2Ca_2Cu_3O_（8＋x） IN LOW CURRENT DENSITY

ＴＨＥＣＵＲＲＥＮＴＤＥＮＳＩＴＹＤＥＰＥＮＤＥＮＣＥＯＦＡＣＴＩＶＡＴＩＯＮＥＮＥＲＧＹＩＮＨＩＧＨ－ＴｃＳＵＰＥＲＣＯＮＤＵＣＴＯＲＨｇＢａ_２Ｃａ_２Ｃｕ_３Ｏ_（８＋ｘ）ＩＮＬＯＷＣＵＲＲＥＮＴＤＥＮＳＩＴＹＴＨＥＣＵＲＲＥＮＴＤＥＮＳＩＴＹＤＥ...     

N-(对苯氧基苯基)-甲基丙烯酰胺引发丙烯腈光聚合研究

合成了功能性弹体Ｎ－（对苯氧基苯基）－甲基丙烯酰胺（ＭＡＰＯＡ）及其聚合物（Ｐ（ＭＡＰＯＡ）。研究了ＭＡＰＯＡ引发丙烯腈（ＡＮ）的光聚合行为;测得的光滞的动力学和活化能分别为Ｒp([MAPOA]^0.38[AN]^0.78和Ｅa=24.2kJ/mol;通过对ＭＡＰＯＡ引发丙烯腈光聚合产物的荧光分析发现,ＭＡＰＯＡ不仅参与光引发而且还参与聚合反应,其自身进入到聚合物链中,对ＭＡＰＯＡ及其聚合物的荧光光光谱研究表明,ＭＡＰＯＡ引发丙烯腈光聚合是通过光诱导电荷转移产生自由基引发的机制进行的。     

环状碘Weng盐光引发体系的研究

合成了３种环状碘Ｗｅｎｇ盐，表征了它们的紫外吸收光谱特征，研究了碘Ｗｅｎｇ盐－铜－胺三元引发体系引发丙烯酸β－羟乙酯（ＨＥＡ）－三羟甲基丙烷三丙烯酸酯（ＴＭＰＴＡ）的自由基聚合，结果表明，向酮－胺体系中加入环状碘Ｗｅｎｇ盐可以大大加快聚合速度，根据实验结果，推出了光引发机理。     

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.     

Characterization of Ordovician carbonate reservoirs, southeastern Saskatchewan, Canada

The discovery of the prolific Ordovician Red River reservoirs in 1995 in southeastern Saskatchewan was the catalyst for extensive exploration activity which resulted in the discovery of more than 15 new Red River pools. The best yields of Red River production to date have been from dolomite reservoirs. Understanding the processes of dolomitization is, therefore, crucial for the prediction of the connectivity, spatial distribution and heterogeneity of dolomite reservoirs.The Red River reservoirs in the Midale area consist of 3～4 thin dolomitized zones, with a total thickness of about 20 m, which occur at the top of the Yeoman Formation. Two types of replacement dolomite were recognized in the Red River reservoir: dolomitized burrow infills and dolomitized host matrix. The spatial distribution of dolomite suggests that burrowing organisms played an important role in facilitating the fluid flow in the backfilled sediments. This resulted in penecontemporaneous dolomitization of burrow infills by normal seawater. The dolomite in the host matrix is interpreted as having occurred at shallow burial by evaporitic seawater during precipitation of Lake Almar anhydrite that immediately overlies the Yeoman Formation. However, the low δ18O values of dolomited burrow infills (-5.9‰～ -7.8‰, PDB) and matrix dolomites (-6.6‰～ -8.1‰, avg. -7.4‰ PDB) compared to the estimated values for the late Ordovician marine dolomite could be attributed to modification and alteration of dolomite at higher temperatures during deeper burial, which could also be responsible for its 87Sr/86Sr ratios (0.7084～0.7088) that are higher than suggested for the late Ordovician seawaters (0.7078～0.7080). The trace amounts of saddle dolomite cement in the Red River carbonates are probably related to "cannibalization" of earlier replacement dolomite during the chemical compaction.     

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.     

A computer generator for randomly layered structures

AcomputergeneratorforrandomlylayeredstructuresYUJia shun1,2,HEZhen hua2(1.TheInstituteofGeologicalandNuclearSciences,NewZealand;2.StateKeyLaboratoryofOilandGasReservoirGeologyandExploitation,ChengduUniversityofTechnology,China)Abstract:Analgorithmisintrod…     

An Index mechanism for multi-scale view in spatial databases

There are numerous geometric objects stored in the spatial databases. An importance function in a spatial database is that users can browse the geometric objects as a map efficiently. Thus the spatial database should display the geometric objects users concern about swiftly onto the display window. This process includes two operations:retrieve data from database and then draw them onto screen. Accordingly, to improve the efficiency, we should try to reduce time of both retrieving object and displaying them. The former can be achieved with the aid of spatial index such as R-tree, the latter require to simplify the objects. Simplification means that objects are shown with sufficient but not with unnecessary detail which depend on the scale of browse. So the major problem is how to retrieve data at different detail level efficiently. This paper introduces the implementation of a multi-scale index in the spatial database SISP (Spatial Information Shared Platform) which is generalized from R-tree. The difference between the generalization and the R-tree lies on two facets: One is that every node and geometric object in the generalization is assigned with a importance value which denote the importance of them, and every vertex in the objects are assigned with a importance value,too. The importance value can be use to decide which data should be retrieve from disk in a query. The other difference is that geometric objects in the generalization are divided into one or more sub-blocks, and vertexes are total ordered by their importance value. With the help of the generalized R-tree, one can easily retrieve data at different detail levels.Some experiments are performed on real-life data to evaluate the performance of solutions that separately use normal spatial index and multi-scale spatial index. The results show that the solution using multi-scale index in SISP is satisfying.     

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