从E—LOTOS到图形E—LOTOS的一个编辑和自动转换的编译软件

Ｅ－ＬＯＴＯＳ是形式描述技术ＬＯＴＯＳ的增强版．本文首先提出了一种Ｅ－ＬＯＴＯＳ的图形表示方法,称为图形Ｅ－ＬＯＴＯＳ（即ＧＥ－ＬＯＴＯＳ）．然后利用面向对象程序设计语言Ｊａｖａ 开发出了一个从文本Ｅ－ＬＯＴＯＳ到图形Ｅ－ＬＯＴＯＳ编辑和自动转换编译工具软件．该工具软件可以把Ｅ－ＬＯＴＯＳ以抽象层的形式体现出来．为将来的进一步研究提供了一个良好的环境     

图形LOTOS和Petri同模型在PC机上的实现

在ＰＣ机上建立了一个由ＤＯＳ系统支持的图形ＬＯＴＯＳ（ＧＬＯＴＯＳ）软件工具．用这个工具，用户可以设计，显示一个ＧＬＯＴＯＳ说明，也可以把它转换成Ｐｅｔｒｉ网．该系统分为三个模块：ＤＲＡＷ，ＲＥＣＯＶＥＲ和ＴＲＡＮＳＦＥＲ．根据ＧＬＯＴＯＳ模型，模块ＤＲＡＷ给出了一个交互式的菜单系统，用这个系统，用户可以在图形窗口的任何位置画出ＧＬＯＴＯＳ的任一成分；模块ＲＥＣＯＶＥＲ可以自动恢复以前画好的ＧＬＯＴＯＳ模型；根据Ｐｅｔｒｉ网的表示，模块ＲＥＣＯＶＥＲ提供了从ＧＬＯＴＯＳ自动转换到Ｐｅｔｒｉ网的功能．     

基本FFET的试制和性能研究

论述了铁电场效应晶体管（ＦＦＥＴ）的基本工作原理，给出了其设计方案．采用ＳＯＬ－ＧＥＬ法制备了基本的ＭＦＳ－ＦＥＴ和ＭＦＯＳ－ＦＥＴ，对其电性能进行了测试分析．测试结果表明：ＭＦＯＳ结构的ＦＦＥＴ具有极化存储特性．     

一种有效的形式描述技术:GE-LOTOS

利用面向对象程序设计语言Ｊａｖａ完善从体ＬＯＴＯＳ到ＣＥ－ＬＯＴＯＳ的工具软件,使得以抽象层形式体现出来的ＧＥ－ＬＯＴＯＳ的某一子过程或所有子过程动态展开,而且为了方便用户,满足工业界和其它领域的要求,给出了一个从ＧＥ－ＬＯＴＯＳ到Ｅ－ＬＯＴＯＳ描述的一个算法。     

三维MANDELBROT过程的SHEET-渗流条数

研究了三维ＭＡＮＤＥＬＢＲＯＴ过程的ＳＨＥＥＴ－渗流问题,证明了当Ｐ＞ＰＳ时,三维ＭＡＮＤＥＬＢＲＯＴ过程的ＳＨＥＥＴ－渗流条数是几乎处处有限的,并且给出了其上界估计．参５．     

图形LOTOS和Peteri网模型在PC机上的实现

在ＰＣ机上建立了一个由ＤＯＳ系统支持的图形ＬＯＴＯＳ（ＧＬＯＴＯＳ）软件工具，用这个工具，用户可以设计，显示一个ＧＬＯＴＯＳ说明，也可以把它转换成Ｐｅｔｒｉ网，该系统分为三个模块：ＤＲＡＷ，ＲＥＣＯＶＥＲ和ＴＲＡＮＳＦＥＲ，根据ＧＬＯＴＯＳ模型，模块ＤＲＡＷ给出了一个交互式的菜单，这个系统，用户可以在图形窗口的任何位置画出ＧＬＯＴＯＳ的任一成分；模块ＲＥＣＯＶＥＲ可以自动恢复以前画好的ＧＬＯＴＯＳ     

Oracle数据库系统中PL/SQL程序的自动生成

介绍了Ｏｒａｃｌｅ数据库系统中含ＳＥＬＥＣＴ、ＩＮＳＥＲＴ、ＵＰＤＡＴＥ和ＤＥＬＥＴＥ语句的ＰＬ／ＳＱＬ程序自动生成工具的设计与实现。分析了ＳＱＬ中ＳＥＬＥＣＴ、ＩＮＳＥＲＴ、ＵＰＤＡＴＥ和ＤＥＬＥＴＥ语句的语法结构，介绍了Ｏｒａｃｌｅ数据库中系统表ＵＳＥＲ－ＴＡＢ－ＣＯＬＵＭＮＳ的内容和结构，最后介绍了采用三遍扫描的方法实现ＰＬ／ＳＱＬ程序自动生成的过程。     

关于路由协议的一致性测试的一种形式方法

为了一致性测试Ｉｎｔｅｒｎｅｔ网上的一个标准路信息协议（ＲＩＰ协议），利用形式描述技术语言Ｅ－ＬＯＴＯＳ对其进行了描述，然后把广西描述的Ｅ－ＬＯＴＯＳ转换为ＧＥ－ＬＯＴＯＳ，并在此产生了ＴＴＣＮ测试套。     

QWF－1型汽车尾气分析仪配装自动记录仪的研制

ＱＷＦ－１型汽车尾气分析仪配装自动记录仪的研制ＤＥＶＥＬＯＰＭＥＮＴＯＮＴＨＥＡＴＴＡＣＨＥＤＡＵＴＯＭＡＴＩＣＲＥＣＯＲＤＤＩＡＬＯＦＭＯＤＥＬＱＷＦ－１ＡＵＴＯＴＡＩＬ－ＧＡＳＡＮＡＬＹＳＩＳＡＰＰＡＲＡＴＵＳＬｉＬｉａｎｇｅｒＣｈｅｎＪｉａｎｂ...     

从增强的LOTOS（E—LOTOS）说明到Petri网的转换

Ｅ－ＬＯＴＯＳ对ＬＯＴＯＳ的描述能力进行了多方面增强,Ｐｅｔｒｉ网是分析系统的有效工具,本提出一种从Ｅ－ＬＯＴＯＳ说明到Ｐｅｔｒｉ网的转网方法,并提出南非进一步考虑的问题。     

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.     

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-     

Density Functional Theory for the Response of Periodic Systems to Electric Fields Based on the Vector Potential Approach

正The electronic and nuclear(structural/vibrational)response of 1D-3D nanoscale systems to electric fields gives rise to a host of optical,mechanical,spectral,etc.properties that are of high theoretical and applied interest.Due to the computational difficulty of treating such large systems it is convenient to model them as infinite and periodic(at least,in first approximation).The fundamental theoretical/computational problem in doing so is that