拓扑指数mN与无机氢化物pKa1的关系

受Randic分子连接性拓扑指数的启发,构建了电负性拓扑指数mN.用其0,1阶指数0N和1N,与P区无机氢化物的pKa1值关联,拟合成2个回归方程,其相关系数与相关指数分别为0.995 4和0.995 4.结构选择性达到惟一性表征.预测取得了较好的结果.     

无机含氧酸强度的估算

提出了三个元素键参数拓扑指数：N=1／[n＋n^1/2]^-1、DR=1／[Dr＋m]、He=1／[（1＋n/m）R^1/2ξ]^-1。将包括主族和过渡金属元素在内的34种单中心无机含氧酸的Pk1实验值与其N、DR、He相关联，应用最小二乘法进行线性回归，拟合得：pK1=4．837—3．33N＋30．922DR＋2．604He（R=0．985s=0．889F=323．8P=0．000 n=34），与其他的拓扑指数相比，元素键参数拓扑指数能用于预测过渡金属元素的含氧酸强度，计算精度高。     

价电子轨道平均能量连接性指数mB及对无机氢化物酸性的预测

对Randic分子连接性拓扑指数mX的概念"点价"δi进行改造,构建了一种新的分子连接性拓扑指数,即价电子轨道平均能量连接性指数mB.用mB的0,1阶指数0B,1B与周期表中P区无机氢化物的pKa1关联,拟合成2个线性方程,其相关系数与相关指数分别为0.994 2和0.994 6,拓扑指数的结构选择性满足唯一性表征.预测取得了较好的结果.     

拓扑指数mZ与无机氢化物pKa1的关系

受Randic分子连接性拓扑指数的启发，构建了拓扑指数^mZ。用其1阶(^1Z)指数，1阶指数和元素电负性差的平方(XA-XH)^2与13种p区无机氢化物的pKa1值关联．拟合成2个回归方程，其相关系数与相关指数分别为0．9938和0．9961，结构选择性达到唯一性表征，预测取得了较好的结果。     

价电子轨道能量拓扑指数mE及其对P区氢化物酸性的预测

受Randic分子连接性拓扑指数mX的启发,构建了一种价电子轨道能量拓扑指数mE.利用其0阶(0E)和1阶(1E)指数,与13种p区无机氢化物的pKa1关联,拟合成2个线性回归方程.拓扑指数的结构选择性达到唯一性表征,相关系(指)数为0.9942(0.9949).预测取得了令人满意的结果.     

无机氢化物pKa1与拓扑指数mU的关系

受Randic分子连接性拓扑指数的启发，构建了拓扑指数^mU．用其0，1阶指数^0U，^0U和^1U,^0U和杨频教授的ρ值与P区无机氢化物的pKα1值关联，拟合成3个回归方程，其相关系数与相关指数分别为0．9932，0．9943和0.9963,预测取得了较好的结果。     

用于镧系元素理化性质相关性研究的新的键参数拓扑指数

根据镧系元素的原子序数Z、价电子数N、离子半径r提出了一个新的键参数拓扑指数HZ,并将HZ、镧系元素相对分子质量Mr共同与其11种理化性质进行关联,其结果显示了满意的线性相关性.     

食品香味物质分子连接性拓扑指数mP与性质的定量关系

在分子支化度拓扑指数的基础上,定义了一个新的拓扑指数^mP,用其0、1阶拓扑指数⁰P、¹P分别与食品香味物质酯、酮的色谱保留值、香气阈值相关联,建立了食品香味物质酯、酮拓扑指数^mP与色谱保留时间、阈值之间的关系模型,两模型的相关系数（r）分别为0.998、0.975,标准偏差（S）分别为0.020、0.183。通过"留一法"交互检验证明,所建模型具有良好的稳定性和预测能力。     

价轨道能量差连接性指数m~F与无机氢化物pKa_1的关系

该文运用徐光宪院士的 E_i=n_i+0.4L 公式,对 Randic 分子连接性拓扑指数 ~mX 的核心概念“点价”δ_i进行改造,构建了一种新的价轨道能量差连接性指数~mF,用其0,1阶指数~0F、~1F 与 p 区无机氢化物的 pKa_1,值关联,拟合成2个线性方程。其相关系数与相关指数分别为0.9934与0.9940,拓扑指数的结构选择性满足唯一性表征,预测取得了较好的结果。     

链烷烃标准熵定量构效关系的研究

基于核磁共振现象定义了一个新的拓扑指数1R,研究了链烷烃的标准熵与1R及碳原子得到数N的相关性.对比发现,157个链烷烃标准熵的计算值与实验值非常吻合,分析得到的方程可用于链烷烃标准熵的估算与预测.     

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.     

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.     

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.