微孔分子筛的合成研究

在本文中详细介绍了微孔分子筛合成方法的研究进展,微孔分子筛最初有天然发现到人工合成经过了很长时间,其合成方法有最的水热合成发展到现在有十几种合成方法。     

双氧水法合成二硫化四苄基秋兰姆

介绍了目前国内外二硫化四苄基秋兰姆的各种合成方法,并对这几种合成方法作了详细的对比,比较的结果认为用双氧水氧化法合成促进剂二硫化四甲基秋兰姆是较佳的合成方法。同时介绍了双氧水氧化法合成促进剂TBzTD的最佳工艺。     

证据合成的一般框架及高度冲突证据合成方法

针对D-S证据理论在合成高度冲突证据时会得到有悖常理的无效结果的问题,提出了有效解决冲突须同时修正证据源和合成规则的原则,并给出了证据合成的一般框架;在此框架下,提出了一种新的证据合成方法。该方法首先对证据源进行两级可靠性度量处理,然后再按照合成规则进行合成,最后采用基于Pignistic概率距离计算的权重把冲突系数分配给各焦元,实现对合成结果的合理修正。实验结果表明:该方法能有效地解决高度冲突证据的合成问题,与其他合成方法相比,该方法合成效果更好。     

合成[（C3S5）2Zn]（NBu4）2的三种方法及合成条件优化

本文介绍了合成配合物[（C3S5）2Zn]（NBu4）2的三种方法-Steimecke合成法、溶剂热合成法和冰浴合成法．对三种合成方法的优缺点做了比较和分析,并对每种方法的反应条件进行了优化．     

迷迭香酸及其衍生物的合成研究进展

迷迭香酸为具有多种生理活性的多酚酸类化合物,由于从植物材料中制备高纯度迷迭香酸的成本较高,因此迷迭香酸及其衍生物的合成受到广泛关注,综述了迷迭香酸的合成方法,包括生物酶法合成途径、化学-酶法合成途径、化学方法合成途径,以及迷迭香酸相应的酯化衍生物和酰胺衍生物的合成方法.     

星系的星族合成研究

星系的研究是当今天体物理研究的热点之一,星系合成是星系研究的重要方法之一。介绍了研究星系的星族合成方法及其应用,并概述了演化星族合成的研究状况、展望了星族合成研究的前景。     

一种新的冲突证据合成方法

该文在探讨已有冲突证据合成方法的基础上,提出了一种新的冲突证据合成方法—基于证据自冲突和证据间距离最小的证据合成方法(M-C合成方法),并通过实例说明了这一方法的优良特性.     

分子筛合成方法及应用研究

综述了分子筛合成及应用领域的研究,着重介绍了几种具有代表性的分子筛合成方法,包括水热合成、溶剂热合成、气相转移合成和干胶转化合成、离子热合成等,并叙述了分子筛在化工、生物技术、信息技术、环境保护等方面的应用。     

基于秩相关系数的证据合成方法

针对传统Dempster-Shafer证据合成方法合成冲突证据时,会出现相悖结论的问题,提出了基于秩相关系数的冲突证据合成方法。方法利用证据冲突信息,通过秩相关系数得到证据间的相关程度,通过算法步骤顺序求解证据距离以及权重系数,根据权重系数对证据进行重新概率分配后,完成证据预处理过程,最后用改进的合成规则,完成再分配证据的合成。具体的证据实证验证了算法在合成冲突证据方法具有最优结果,且和推理一致,可以很好地用于证据合成。     

多层次、多侧面的商空间合成方法研究

文章对商空间理论中的合成方法进行了扩展,提出了多层次、多侧面的商空间合成模型,讨论了模糊等价关系运算与距离空间合成和多侧面商空间合成之间的关系,并将多层次、多侧面的商空间合成模型应用于纹理图的分割。实验验证了这一方法的可行性和有效性。     

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.     

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.     

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.     

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-