变截面构件惯性矩的计算与应用

本文以三点符合于实际截面变化的任意ｍ次抛物线代替两点符合的整次幂抛物线，来描述变截面构件惯性矩的变化规律。并依据判别式导出直接求解幂指数的高精度近似公式，对解决实际计算的疑难，克服传统方法存在的较大误差，推广采用多系数折算惯性矩分析变截面结构的强度和刚度，提供了便利。     

浅谈外币报表折算差额

本文主要讨论了外币报表折算差额的性质、外币报表折算差额的确认及目前国际上对外币报表折算差额处理和揭示的几种方法 ,并介绍了我国对外币报表折算差额的处理趋势。     

仁怀市耕地占补平衡按等级折算研究

耕地占补平衡是实现耕地保护的重要手段。补充耕地缺乏质量衡量标准和检验机制,使得补充耕地质量难以保证,不能实现真正意义上的占补平衡。以贵州省仁怀市为研究对象,根据仁怀市农用地分等定级研究成果,建立农用地利用等指数与标准粮食产量之间的数学模型,求算仁怀市耕地等级折算系数,为仁怀市实现耕地占补的数量、质量综合平衡提供参考依据。     

吐温定子感应电动机的工形等效电路

从等效旋转概念出发，先导出吐温定子感应电动机的基本方程，然后进行频率折算和绕组折算，最后导出吐温定子感应时机的工形等效电路。     

组合梁振动分析的折算系数法

采用折算系数法,建立了组合梁振动的运动微分方程,并对其振动特性进行了分析。     

冰期水面蒸发折算系数及D20水面蒸发器注水深度探讨

通过对兰村水文站某一冰期水面蒸发实验和非冰期E601和D20蒸发器的水面蒸发发对比观测资料的分析，得出了冰期用E601半深、冰期与非冰期用D20注水深50mm蒸发器观测的蒸发量与E601型蒸发器量相关关系密切，折算九比较稳定的初步结论。     

拉力作用下十字形板——球节点的受力分析

本文对以十字形板与焊接空心球相连的网架节点用有限元的方法进行了受力分析与试验研究,摸清了球面及十字形板内的应力分布规律。分析指出,影响球面应力大小的决定因素是板宽及球厚,板厚及球的直径对球面应力的影响很小。     

微积分法计算抽油井井底压力

针对传统的测量抽油井井底压力方法的局限性，在用回声仪测液面折算压力的基础上，考虑了气体在油水中相溶解性和油气水中相容解性和油气水的压缩性，采用与管柱中的流体分布相吻合的n段法计算模式，以及Gilbert相关模型和Podio相关模型，应用微积分方法计算油井的井底压力，实例计算结果表明：该方法计算的抽油井井底压力与压力计实测值误差较小。     

火电厂脱硫烟气连续排放监测系统的应用与维护

本文根据张家口发电厂脱硫烟气监测系统的实际运行和维护情况,简单介绍了烟气监测系统的组成及工作原理,重点阐述了如何将系统采集的数据折算成符合当前环保标准要求的报送数据和系统日常维护的注意事项。     

煤矿井下轨道运输系统优化

本文对煤矿井下轨道运输系统参数优化问题进行了讨论。文中采用计算机模拟与迭代搜索相结合的方法,以运输系统折算费用最小为目标,建立了经济数学模型,用以选择最优运输方案.     

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-