用JAVA/CORBA构筑新型的企业分布开放系统

ＪＡＶＡ的可下载对象功能和它与ＷＷＷ浏览器的紧密结合,使ＪＡＶＡ成为开发基于Ｉｎｔｅｒｎｅｔ和ＷＥＢ的分布式应用的理想媒体,但由于ＪＡＶＡ缺乏Ｃｌｉｅｎｔ／Ｓｅｒｖｅｒ（客户／服务器）模型,必须通过增加一个分布对象基础结构来弥补,ＯＭＧ（对象管理组）的ＣＯＲＢＡ解决了ＪＡＶＡ在Ｃｌｉｅｎｔ／Ｓｅｒｖｅｒ的缺陷,通过ＪＡＶＡ和ＣＯＲＢＡ的结合,可以构筑新型的企业分布开放系统。     

使用Java/CORBA构造分布式应用

ａｖａ语言、ＷＷＷ和ＣＯＲＢＡ为开发分布式应用提供了强大能力。提出了一种ＷＷＷ可下载的Ｊａｖａａｐｐｌｅｔｓ客户软件的开发方法,它使用ＣＯＲＢＡ与远程服务器软件进行高效率交互,并协调和控制对共享资源的访问。     

INTERNET的基本服务

Ｉｎｔｅｒｎｅｔ的服务包括两类：一类是传统的基本的信息应用服务功能，包括Ｅ－ｍａｉｌ、Ｔｅｌｎｅ土、ＦＩＰ；另一类是信息查询服务，如交互式信息服务软件ＷＷＷ、Ｇｏｐｈｅｒ，目录服务软件、ＷＨＯＩＳ、ＮＥＴＰＩＮＤ和Ｘ。５００，索引服务软件Ａｒｃｈｉｅ、Ｖｅｒｏｎｉｃａ、Ｊｕｇｈｅａｄ和ＷＡＩＳ等。在所有这些软件中又以ＷＷＷ浏览器最受欢迎，最为流行。ＷＷＷ我们已在上一节作了介绍。下面我们着重介绍一下Ｉｎｔｅｒｎｅｔ的传统的基本信息应用服务。 电子邮件 Ｅ－Ｍａｉｌ 电子邮件Ｅ－ｍａｉｌ和远程登录Ｔｅ…     

一种新型的程序设计语言——JAVA语言

ＪＡＶＡ语言是由ＳＵＮ公司设计的一种面向对象的新型程序设计语言。ＪＡＶＡ可用来开发能够在Ｉｎｔｅｒｎｅｔ上传输并可在网络任何一处运行的应用程序。文中主要介绍ＪＡＶＡ语言的主要特点及其应用，并简要介绍用ＪＡＶＡ语言进行编程的方法     

JAVA与C混合编程问题探讨

讨论了如何利用本地方和动态链接函数库实现ＪＡＶＡ与Ｃ的混合编程的方法,同时指出了ＪＡＶＡ和Ｃ之间的参数传递关系。     

JAVA语言实现对象关系数据库的方法

ＪＡＶＡ语言的产生以及ＪＡＶＡ虚拟机的跨平台性为开发新的对象数据提供了方便,提出了一种按照Ａｔｋｉｎｓｏｎ正交持久化理论持久化对象,按照ＡｓｓｏｃｉａｔｉｏｎＡｌｇｅｂｒａ中关联逄子计算关联集来访问持久对象集的对象关系数据库的管理与方法。     

渗透蒸发膜的研制：聚丙烯酸与聚乙烯醇等共混及其缩醛化

以乙醇水溶液为分离对象，研究了聚丙烯酸（ＰＡＡ）与聚酰胺羧或聚乙烯醇（ＰＶＡ）共混膜的渗透蒸发分离性能，以及均相，非均相缩醛反应对ＰＶＡ膜分离因素α和渗透通量Ｊ的影响。实验发现，戊二醛交联ＰＶＡ膜的α提高 到４９．５（乙醇含水Ｃ１＝１０％，温度为５５℃）；增加非均相缩甲醛反应时间，ＰＶＡ／ＰＡＡ共混膜的α先下降而后趋于不变，同时Ｊ存在一最大值。     

JD病毒基因组片段的克隆和序列分析

扩增并克隆了ＪＤ病毒的ｇａｇ 基因片段（位于３００ｎｔ～５６４ｎｔ,编码基质蛋白ＭＡ）和ｐｏｌ基因片段（位于３４６７ｎｔ～３６９１ｎｔ,编码反转录酶ＲＴ）,测定其序列并同ＢＩＶ、ＢＦＶ 和ＢＬＶ 的相应基因进行比较．所建立的方法能够特异性扩增ＪＤＶ序列,适用于ＪＤＶ的检测     

JDBC连接数据库

介绍了ＷＷＷ连接数据库的方法,讨论了ＪＤＢＣ原理和结构,并给出了用ＪＤＢＣ连接数据库的应用实例。     

数据库访问技术研究

研究用ＪＡＶＡ程序、用ＲｅｃｏｒｄＳｅｔ功能访问数据库的有关技术问题。     

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-