电力系统厂站及调度自动化浅谈

随着我国市场经济发展与技术的进步，推动了电力系统趋向自动化的发展。该文通过对电力系统,1＂I-站自动化以及调度自动化的分析，探讨了电力系统自动化的发展方向。     

中美图书馆自动化系统比较分析

本文论述了中美两国图书馆自动化的发展和现状，重点列举了两国具有代表性的图书馆自动化系统，比较分析两国在这一领域的差距，对我国图书馆自动化建设问题提出了一些意见．     

浅析火灾自动报警系统于智能建筑中的应用

一、智能建筑概念和火灾自动报警系统 智能化建筑的发展历史较短，有关智能建筑的系统描述很多，目前尚无统一的概念。一般认为，智能建筑以建筑为平台，兼备通信、办公、建筑设备自动化，集成系统结构、服务、管理及它们之间的最优化组合，创造一个高效、舒适、便利的生活或生产环境。智能化建筑应当具有四大主要特征，既建筑物自动化（BA）、通信自动化（CA）、办公自动化（OA）、布线综合化。智能建筑的核心是建筑物自动化、通信自动化、办公自动化的系统集成。     

软件自动化测试的设计与实施

本文首先介绍了软件自动化测试的发展趋势与自动化测试的优点，其次详细论述了自动化测试的脚本技术及其特点，通过对自动化测试脚本的分析与应用，举例脚本设计框架中基于数据驱动的GUI功能测试模型，最后说明了自动化测试实施时所要考虑的几个因素。     

数字环境下国内图书馆自动化管理系统的选择

数字环境下图书馆对自动化管理系统的选择应从基本需求以及系统的基本功能特征等方面考虑，对其性能、功能，检索等方面进行比较，从而选择合理且符合本馆特色的自动化管理系统。     

浅谈变电站自动化系统存在的几个问题

变电站自动化系统在110KV～35KV变电站的广泛应用，对供电公司各级变电站实现保护监控系统升级换代、提高变电站的自动化程度、实现调度自动化和抄表自动化、建设无人值班变电站和减人增效等方面发挥了积极的作用。在实际运行中，变电站自动化系统也出现了一些问题，有些问题已经影     

浅谈电网工程中调度自动化的应用和发展

随着经济的发展，社会不断的进步，电力行业成了经济发展的标兵。电网调度自动化系统起到了决定性的作用，而可靠的自动化设备是调度自动化的基础，它的发展变化也是我们研究的话题。     

浅析仪表自动化工程的质量控制

本文以仪表自动化工程为论述对象，以仪表自动化工程中的质量控制为主题展开，在简要介绍仪表自动化的概念与定位，并对当前仪表自动化工程中存在的问题进行分析后，提出应当从元件生产和项目施工两个方面，对仪表自动化工程进行质量控制。     

配电自动化

首先阐述了配电自动化的基本概念,分析了我国配电网的现状,指出在近期配电网的建设和改造过程中,应同时做好配电自动化的规划,认为配电自动化主要包括变电站自动化和馈线自动化,并分别介绍其内容和基本功能,最后就配电自动化提出几点建议。     

谈现代配电自动化面临的问题及发展

本文主要介绍了国内外配电自动化发展概况，在电力市场环境下配电系统综合自动化的要求，即要面对的问题。以及新时期配电自动化的发展趋势。     

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