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．     

LiH+和LiH-势能函数与光谱参数的理论计算

用密度泛函理论B3LYP方法和6-311 G**基函数对LiH 和LiH-分子离子进行理论计算研究.结果表明,这两个分子离子的基态均为X2∑,其势能函数可以用Murrll-Sorbie来表达.通过势能函数参数得到分子离子的光谱数据.     

LiH,BeH和BH基态分子结构与势能函数

用高级电子相关偶合簇方法CCSD(T)和aug-cc-pVTZ基函数计算研究了LiH,BeH和BH基态的结构与势能函数,导出了分子的光谱数据.结果表明,LiH,BeH和BH分子基态分别为X1Σ+,X2Σ+和X1Σ+,基态势能函数均可用Murrell-Sorbie function来表达.     

RuB分子和RuB+分子离子基态结构与性质研究

在Ru原子相对论有效原子实势和Lanl2dz基函数近似下,使用密度泛函理论B3LYP方法和B原子6-311G**基函数分别对RuB分子和RuB 分子离子进行几何优化,得到基态电子状态分别为X2Σ和X3Σ,基态势能函数可用Murrell-Sorbie函数表达,并计算得到相应的力常数与光谱数据以及RuB分子的垂直电离势.     

MgHn+(n=0,1)分子及分子离子的结构与性质研究

使用高水平从头算CCSD(T)方法和aug-cc-pVTZ基函数分别对MgH分子和MgH 分子离子进行几何优化计算,得到基态电子状态分别为X2Σ和X1Σ,基态势能函数可用Murrell-Sorbie函数表达,并计算得到相应的力常数与光谱数据以及MgH分子的垂直电离势.     

电荷对FeHn±(n=0,1,2)分子离子的势能函数和能级的影响

用密度泛函B3lyp/6-311++g(d,p)方法对FeHn±(n=0,1,2)分子离子进行理论研究.结果表明:FeH,FeH+,FeH-均能稳定存在,FeH2+和FeH2-有亚稳定态存在,其基态电子态分别是: 4Δ(FeH),5∑(FeH+),5∑(FeH-),4∑(FeH2+)和6∑(FeH2-),FeH2+和FeH2-的势能函数呈明显的‘火山态'型,导出了相应的分子离子的解析势能函数、光谱数据和力常数,比较了四参数、八参数Murrell-Sorbie势和Zhu-Wang势对不稳定分子势能函数的拟合情况,指出了用八参数Murrell-Sorbie势对‘火山态'型势能函数的拟合也是合适的;同时讨论了电荷对势能函数和能级的影响.     

B_2基态分子结构及势能函数研究

利用密度泛函理论B3LYP方法,分别选用D95*、3-21+G、6-31G*、6-31+G*、6-311G*、6-311+G*、cc-PVDZ和cc-PVTZ等基组对B2基态分子进行结构优化.选用最佳组合B3LYP/cc-PVTZ研究了B2基态分子结构和势能函数,导出离解能、力常数(f2,f3,f4)和光谱常数(ωe,Be,αe,ωeχe).结果表明:计算出的离解能和光谱常数与实验值吻合较好;基态分子的势能函数可用Murrell-Sorbie正确表示.     

BN和AlN分子基态与低激发态的势能函数与热力学性质

用密度泛函理论B3LYP方法和6-311+G*基函数计算研究BN和AlN分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,BN和AlN分子基态均为X3Σ,基态与低激发态的势能函数均可用Murrell-Sorbie函数来表达.BN分子低激发态a1Σ的绝热激发能为78.85 kJ·mol-1,AlN分子低激发态a1Σ的绝热激发能为111.27 kJ·mol-1.计算固体BN和AlN的平衡能量E和熵S时,近似以气体分子的电子能和振动能代替固体分子的平衡能量E,用电子熵和振动熵代替固体分子的熵.在此近似下,计算得到BN和AlN基态与低激发态固态分子温度与平衡压力的关系式.     

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.     

电荷对VFn±（n=0,1,2）双原子分子离子光谱与分析势能函数的影响

用密度泛函B3LYP/6-311++g(d,p)方法对VFn±(n=0,1,2)分子离子的势能函数及光谱常数进行了分析,结果表明它们都能稳定存在,其基态电子态分别为5Π(VF),4Σ(VF+),4Σ(VF-),3Σ(VF2+),5Σ(VF2-),其中2价离子的势能函数曲线明显呈"火山口"型,属于亚稳态分子离子,用8参数Murrell-Sorbie势拟合2价亚稳态双原子分子离子势能函数得到的拟合曲线与势能扫描点符合得非常好,而4参数Murrell-Sorbie势对2价离子的拟合与势能扫描点有较大的差距.     

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.     

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.     

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.     

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.     

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.     

橡胶颗粒沥青混合料低温抗裂性试验研究

以AC-13级配为基础,将橡胶颗粒代替部分集料掺入混合料中,以低温弯曲试验为评价方法对不同橡胶颗粒掺量下沥青混合料的低温抗裂性进行研究,并引入应变能密度值对混合料的低温抗裂性进行综合评价.试验结果表明:橡胶颗粒沥青混合料试件的破坏微应变均超过2 300,满足冬寒区的技术指标;无论是否掺加橡胶颗粒,随着温度的下降,沥青混合料破坏时的最大弯拉强度增大,弯拉应变降低,劲度模量增大;弯曲应变能密度在胶粒掺量为1%左右时具有较大的弯曲应变能密度值,此时橡胶颗粒沥青混合料具有较好的低温抗裂性.     

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。     

Quantitative trait loci （QTLs） for quality traits related to protein and starch in wheat

Quality traits in wheat （Triticum aestirum L.） were studied by quantitative trait locus （QTL） analysis in a recombinant inbred line （RIL） population, a set of 131 lines derived from Chuan 35050 × Shannong 483 cross （ChSh）. Grains from RILs were assayed for 21 quality traits related to protein and starch. A total of 35 putative QTLs for 19 traits with a single QTL explaining 7.99-40.52% of phenotypic variations were detected on 10 chromosomes, 1D, 2A, 2D, 3B, 3D, 5A, 6A, 6B, 6D, and 7B. The additive effects of 30 QTLs were positive, contributed by Chuan 35050, the remaining 5 QTLs were negative with the additive effect contributed by Shannong 483. For protein traits, 15 QTLs were obtained and most of them were located on chromosomes 1 D, 3B and 6D, while 20 QTLs for starch traits were detected and most of them were located on chromosomes 3D, 6B and 7B. Only 7 QTLs for protein and starch traits were co-located in three regions on chromosomes 1D, 2A and 2D. These protein and starch trait QTLs showed a distinct distribution pattern in certain regions and chromosomes. Twenty-two QTLs were clustered in 6 regions of 5 chromosomes. Two QTL clusters for protein traits were located on chromosomes 1D and 3B, respectively, three clusters for starch traits on chromosomes 3D, 6B and 7B, and one cluster including protein and starch traits on chromosome 1D.     

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.