扩展

On this basis a design scheme of the database for SCADA based on the component object model is presented, in which the content and background of IEC 61970 standard is introduced first, then some different component model are assayed , then a design scheme of the database for SCADA based on the component object model is presented, the foreground application of SCADA is connected with the database by components.The new model have some advantages: system have disrelation with develop language ,the peculiarity of COM make the system fit in with different apply program developed with different language;(2) the system can be modified and upgraded easily by means of upgrading the component modules;(3) the system can be enlarged easily by means of adding the new component modules without quiet amendment in old system.

为此，本文介绍了一种基于组件对象模型的SCADA数据库系统设计方案，文中首先介绍了IEC61970标准的内容及产生背景，分析了几种不同的组件模型，在此基础上，提出了一种基于COM组件技术的SCADA数据库设计及访问模式，在此模式下根据SCADA数据库不同的功用划分了不同的组件模块，利用组件连接数据库与SCADA前台应用，基于组件技术的SCADA数据库设计有以下一些特点：(1)与语言无关性，COM的特性决定了此系统上可以应用不同语言开发的应用程序；(2)系统易修改及维护，用户可以通过更新组件模块的方式修改及维护系统；(3)系统易扩展新的功能，用户可以通过开发新的组件方式将新的应用与原系统结合，而不用对原系统做很大的修改。

After the initiation of crack, the crack propagating of alloys with 0.5%Ce addition is accelerated evidently because of the appearance of needle rear earth rich phases which dissever the matrix and lead to the decrease of mechanical properties and thermal fatigue resistance.

加入0.5%Ce的合金在裂纹形成后期扩展速度明显加快，这是因为合金中出现针状富稀土相，这种针状相割裂了基体，使得合金力学性能降低、热疲劳抗力下降。

But, in such a spatially extended dissipative system with strong nonlinearity, the discharge behaviors are more complicated than that has been reported..

但是在这样一个具有强烈非线性的空间扩展耗散型放电系统中，放电行为是非常复杂的，有许多方面仍然处于研究讨论之中。

It is a mistake to think that that little room has elastic walls and can distend to any extent .

如果认为那小房间的墙壁有伸缩性，可以任意扩展，那就大错特错了。

This represents the pressure at which the lung begins to stiffen and over distend during inflation.

这显示的是肺在不扩张的状态下积聚在通道的压力；上拐点是肺活量与气道压力突然停止上升所产生的压力，这显示的是肺在扩展状态下变硬和扩张的压力。

As the mass emerging of new words, the disyllabic word-formation methods had added more forms, all these led to the change of the basic features of vocabulary.

但是在新词的产生上，单词的这些发展己经不是词汇变化的主流形式，新词的产生己经让位于通过词形扩展的方式形成的双音词。

The requirement of control system specification constantly and diversely changes which results in the problem that the control software is hard to program and test. In order to deal with the problem, the theory of control system design based a high level extended Petri net is discussed in this paper.

为了解决现代控制系统的规模越来越大，柔性要求越来越高，所导致的控制软件的编制和调试越来越难的问题，本文主要探讨了基于一种高级扩展Petri网的控制系统设计理论。

In this paper, crossover operator and diversity control factor are introduced to keep the harmony between attraction and expand.

该文采用多样性控制与交叉操作，使粒子群在细化搜索与扩展新区之间进行协调，提出了协调粒子群优化算法HPSO。

He divi 6 ded the whole country into six circuits and appointed justices to each.

亨利二世大大加强了王家法院，扩展了其司法工作的职权范围。

But where there are no parts, neither extension, shape, nor divisibility is possible.

但是也可能存在没有部分，扩展，形状，可分割性的事物。

As she looked at Warrington's manly face, and dark, melancholy eyes, she had settled in her mind that he must have been the victim of an unhappy attachment.

每逢看到沃林顿那刚毅的脸，那乌黑、忧郁的眼睛，她便会相信，他一定作过不幸的爱情的受害者。

Maybe they'll disappear into a pothole.

也许他们将在壶穴里消失