焓衡算求精馏塔理论板数

本文用焓衡算操作线方程图解精镏塔理论板数,以七种物系为例,图解计算结果,较M—T法图解理论塔板数为少。     

多油楔轴承动态特性的有限元分析

应用有限元法，求解动压润滑轴承中二维雷诺方程，计算了具有轴向油槽的双油楔，三油楔和四油楔径向轴承的刚度和阻尼系数，求解中对雷诺方程的计算只进行一次求解，而不需要进行八次求解即可达到预定的精度，计算结果与实验结果进行了比较，两者吻合较好。     

关于Odaka方程的求解问题

Ｏｄａｋａ方程是透视投影的基本方程，是Ｋｒｕｐｐａ定理的解析表达式，它反映了三点透视投影中各参数之间的定量关系，在基础理论和实际应用方面都有重要意义．本文分析了该方程的给题条件，从数解和图解两种途径，阐述了方程的求解方法，主要解法包括几何迭代法和数学迭代法，这将为Ｏｄａｋａ方程的进一步应用奠定基础．     

施工测量中前方交会的平差及精度

在施工测量中用三方向前方交会定点中产生的示误三角形，通常用近似图解平差方法来确定点位。本文提出了严密平差图解方法来确定点位，它的精度比用近似方法高，而且计算亦很简单．一切计算工作均可在施工测量前进行． 本文还对各种近似方法与严密方法进行了比较，最后讨论了点位精度计算方法．     

圆环壳在承受轴对称载荷时的复变量方程和渐近解法

本文根据壳体理论，导出了圆环壳的Ｔｏｌｋｅ方程，再由此导出Ｅ·Ｒｅｉｓｓｎｅｒ—Ｃｌａｒｋ方程和方程。这说明了三种方程的一致性，只是所取的复交量不同，若采用其它复交量，还有其它形式的复交量方程。这些方程的误差均在壳体理论的误差范围之内。 本文研究了这些含有转向点的二阶微分方程的渐近解。着重研究了非齐次解，针对非齐次项含有奇异性及不含奇异性情况，分别导出一次渐近解及二次渐近解。指出三种方程的不同点及相同点，并通过例子说明三种方程计算结果的一致性。     

多元系相界上类Margules方程

本文在多元多相体系变通的Gibbs-Duhem方程基础上,提出相界上的类Margules方程,用解析方法替代相界上Gibbs-Duhem方程图解积分,并能克服图解积分中出现的一些固有问题。     

MATHEMATICA在弹性力学解析法中的应用

根据二维双调和方程的特点并借助于MATHEMATICA软件，得到了应力函数双调和方程的多项式解答。作为算例，对平面问题中简支梁受三次分布载荷作用时的应力进行了计算。     

一类无条件稳定的Schrodinger方程的显示拟谱方法

研究了非线性Ｓｃｈｒｏｄｉｎｇｅｒ方程的三怪显式所谱格式，利用有是延拓法讨论了收敛性及稳定性，得到了该格式是无条件稳定的，所以该格式适用于长时间的动力行为的计算，文中通过数值举例验证了格式的可信性，并对五次Ｓｃｈｒｏｄｉｎｇｅｒ方程进行了数值模拟，得到了五次方程的拟周期结构。     

一类无条件稳定的Schrdinger方程的显式拟谱方法

研究了非线性Ｓｃｈｒｏｄｉｎｇｅｒ方程的三层显式拟谱格式，利用有界延拓法讨论了收敛性及稳定性，得到了该格式是无条件稳定的，所以该格式适用于长时间的动力行为的计算．文中通过数值举例验证了格式的可信性，并对五次Ｓｃｈｒｏｄｉｎｇｅｒ方程进行了数值模拟，得到了五次方程的拟周期结构     

悬挂结构地震反应的样条有限条分析

在符拉索夫开口薄壁杆件理论平面假定的基础上，对核筒采用三次Ｂ样条有限条方法构造连续化模型，并分别计算其动、势能、针对悬挂部分，分别应用连续梁的三弯矩方程和悬吊体系理论，计算其动、热能、然后，由拉格朗日公式，得到悬挂结构体系的动力方程，并用Ｗｉｌｓｏｎ－θ法求解。最后，结合算例得到了具有实际意义的结论。     

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.     

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。     

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.     

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

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Achieving Unusual States of Matter Under High Pressure

The elongation method,originally proposed by Imamura was further developed for many years in our group.As a method towards O(N)with high efficiency and high accuracy for any dimensional systems.This treatment designed for one-dimensional(ID)polymers is now available for three-dimensional(3D)systems,but geometry optimization is now possible only for 1D-systems.As an approach toward post-Hartree-Fock,it was also extended to