PdH2和YH2分子结构与分子光谱

使用钯和钇原子相对论有效原子实势SDD和密度泛函理论B3LYP方法对PdH2和YH2分子结构与分子光谱进行理论研究.结果表明PdH2分子基态为角形C2v结构,基态电子态为1A1,平衡几何为RPd-H=0.169 3 nm,∠HPdH=29.3°,YH2分子基态为角形C2v结构,基态电子态为2A1,平衡几何为RY-H=0.196 2 nm,∠HYH=114.3°.同时计算给出各种稳定结构的振动频率,红外强度,拉曼活性与退极化率和偶极矩.     

SiCO体系的结构和性质研究

采用未考虑电子瞬时相关效应的Hartee-Hock(HF_法和组态相互作用法QCISD在6－311＋＋G基组下对分子体系SiCO进行了ab initio计算，得到了SICO体系的两个不同线性平衡结构，Si-CO,Si-OC和一个角形结构Si-CO，并分别计算出它们的结构，能量和力常数，线性Si-C结构为该体系的最稳定结构，线性Si-CO结构为体系的另一稳定结构，属于亚稳态，它们均属于CV构型且基电子态均为X3∑，角型Si-CO结构可能是线性稳态结构Si-CO和Si-OC结构互变时的一个中间过滤态即鞍点。     

CCCF自由基的低能电子态的从头算研究

本文通过系统的使用完全活化空间自洽场(CASSCF)和多组态二阶微扰理论(CASPT2)方法配合augcc-p VTZ基组研究了CCCF自由基及其阴阳离子的低能电子态.计算结果显示,CCCF自由基的基态X2A'的转动常数B=4 500.5 MHz,这与实验值的4 555.804 3 MHz吻合良好.垂直激发过程中,最大振子强度出现在2.893e V和4.180 e V的位置,对应的激发属性分别为X2A'→32A″和X2A'→52A'.另外分析得到CCCF自由基的基态电子态X2A'呈现弯曲结构,且其未成对的单电子出现在C3原子上,而其对应的激发态电子态12A″(12Π)则呈现线性结构,并且其对应的未成对单电子出现在C1原子上.     

PdHn+(n=1,2,3)分子离子的稳定性

采用密度泛函理论中B3LYP方法，Pd原子和H原子分别使用相对论有效原子实势SDD和6-311＋＋G^＊＊基组对PdH^＋、PdH^2＋和PdH^3＋分子离子的势能曲线与稳定性进行计算研究，结果表明PdH^＋分子离子基态电子态为X^1∑，能稳定存在，势能函数可用Murrell-Sorbie函数表达，并首次计算得到相应的力常数与光谱数据；PdH^2＋分子离子基态为X^2∑，能稳定存在，势能函数不可用Murrell-Sorbie函数表达，PdH^3＋分子离子不能稳定存在．     

D2分子X^1∑g^＋,B^1∑u^＋和C^1∏u态的势能函数

使用SAC／SAC—CI和D95＋＋＊＊、6—311＋＋g＊＊及cc—PVTZ基组,分别对D2分子的基态X^1∑6^＋、第二激发态B^1∑u^＋和第三简并激发态CI见的平衡结构和谐振频率进行优化计算．对所有计算结果进行比较,得出cc—PVTZ基组为最优基组．运用cc—PVTZ基组和SAC方法对基态X^1∑g^＋、SAC—CI方法对激发态B^1∑u^＋和C^1∏u进行单点能扫描计算,并用正规方程组拟合Murrell—Sorbie函数,得到相应电子态的势能函数解析式,由得到的势能函数计算了与X^1∑g^＋、B^1∑u^＋和C^1∏u态相对应的光谱常数,结果与实验数据较为一致．     

RuH2分子结构与分子光谱

使用钌原子相对论有效原子实势LanL2dz和密度泛函理论B3LYP方法对RuH2分子结构与分子光谱进行理论研究,结果表明RuH2分子基态为角形C2v结构,基态电子态为3A2,平衡几何为R Ru-H=0.157 4 nm,∠HRuH=74.73°,同时计算给出各种稳定结构的振动频率、红外强度、拉曼活性、退极化率和偶极矩.     

Al_（13）中性正负离子团簇的理论研究

采用第一性原理的全势能线性Muffin-Tin轨道组合分子动力学方法对Al13,Al13＋,Al13-团簇进行了理论计算。得到了Al13,Al13＋,Al13-团簇的基态结构及其一系列的亚稳态结构。Al13和Al13-的基态结构是略有畸变的二十面体,而Al13＋的基态结构是Al13的一个亚稳态结构。发现Al13-基态结构的态密度与试验的结果符合的很好。对这些结构的能量,键长和最高占据态与最低占据态的能量间隔做了讨论。     

CH+,NH+和OH+自由基离子基态与低激发态结构与性质

用密度泛函理论在B3LYP/aug-cc-pVTZ理论水平上计算研究CH ,NH 和OH 自由基离子基态与低激发态的结构与势能函数,导出了分子的光谱数据.结果表明,CH ,NH 和OH 自由基离子基态分别为X1Σ,X2Σ和X3Σ,基态与低激发态的势能函数均可用Murrell-Sorbie函数来表达.CH 自由基离子低激发态a3Σ和5Σ,NH 自由基离子低激发态a4Σ,OH 自由基离子低激发态a1Σ和5Σ的绝热激发能分别为0.909,7.758,0.207,3.104和5.527 eV.     

H2分子X^1Σg^＋，B^1Σu^＋和C^1Πu态的势能函数

使用SAC／SAC—CI方法，利用D95＋＋^＊＊、6—311＋＋g^＊＊以及cc—PVTZ等基组，对H2分子的基态X^1Σg^＋、第二激发态B^1Σu^＋及第三简并激发态C^1Πu的平衡结构和谐振频率进行了优化计算。通过对三个基组的计算结果的比较，得出了cc—PVTZ基组为三个基组中的最优基组的结论；使用cc—PVTZ基组，利用SAC的GSUM（Group Sum of Operators）方法对基态X^1Σg^＋、SAC—CI的GSUM方法对激发态B^1Σu^＋和C^1Πu进行单点能扫描计算，用正规方程组拟合Murrell—Sorbie函数，得到了相应电子态的完整势能函数；从得到的势能函数计算了与基态X^1Σg^＋、第二激发态B^1Σu^＋和第三简并激发态C^1Πu相对应的光谱常数（Be，αe，ωe和ωeχe），结果与实验数据基本一致。     

ReB2电子结构性质的第一性原理计算

利用全势线性缀加平面波方法计算ReB2的体模量、价电荷态密度、电子能带结构和电子态密度.计算发现当取B’0=4时,局域密度近似（LDA）考虑自旋轨道耦合（SOC）得到的体模量为360 GPa,与实验值吻合的很好.电子能带结构表明ReB2具有特殊的金属特性,LDA＋ SOC计算结果发现几乎所有能带沿L-H-A方向发生分裂.价电荷态密度和电子态密度结果表明Re-d和B-p态之间存在强的杂化,形成Re-B共价键,这类共价键是ReB2具有高硬度的主要原因.     

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.     

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.     

A computer generator for randomly layered structures

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

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.     

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.     

海南岛地体及其毗邻陆缘晚中生代—新生代古地磁研究和构造演化

本文叙述了对海南岛及其毗邻大陆边缘白垩纪到第四纪地层岩石进行古地磁研究的全部工作过程。通过分析岩石中剩余磁矢量的磁偏角及磁倾角的变化,提出海南岛白垩纪以来经历的构造演化模式如下:早期伴随顺时针旋转而向南迁移,后期伴随逆时针转动并向北运移。联系该地区及邻区的地质、地球物理资料,对海南岛上述的构造地体运动提出以下认识:北部湾内早期有一拉张作用,主要是该作用使湾内地壳显著伸长减薄,形成北部湾盆地。从而导致了海南岛的早期构造运动,而海南岛后期的构造运动则主要是受南海海底扩张的影响。海南地体运动规律的阐明对于了解北部湾油气盆地的形成演化有重要的理论和实际意义。     

Jane Eyre——A Feminist In The 19th Century

In the 19th century the society was controlled by men, and women were just appendants of them, they had not any rights and freedom. But Jane was an exception, she showed some characteristics of early feminist. Jane showed her characteristics of feminism in three aspects: rebellion, equality, and independence. These characteristics were helpful to her success, and feminism is the only way out for women of that time.     

《Chinese Science Bulletin》SUBJECT INDEX TO VOLUME 59(2014)

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