前后的

This thesis is focused on the study of contingency screening method of power system. The main work fulfilled is as follows. 1 Various performance indexes which represent severity degree of contingencies are proposed and analyzed. These indexes are gotten system state before and after contingency clearing obtained by the means of time domain simulation. They can be computed conveniently and immediately and can meet the need of online transient stability analysis.

论文针对电力系统的暂态稳定事故扫描的方法展开研究，主要完成的工作如下： 1提出并分析了能够表征事故严重程度的各种性能指标，这些指标利用时域仿真工具获得事故清除前后的系统状态计算得到，计算方便快捷，可用于事故的快速筛选和排序。

The electromagnetic structure of voltage transformer,including the turns of secondary winding,the wire cross sections of primary and secondary windings,is optimized with the methods based on the finite analysis theory. The comparison between voltage transformers with and without optimization shows the magnetic field distribution is more reasonable in optimized voltage transformer,which enhances its magnetic field and reduces its size.

应用ANSYS有限元分析中的优化设计技术，对电压互感器的电磁结构(二次绕组匝数及一、二次绕组导线的截面积)进行优化，通过比较优化前后的结果，可以看出优化后电压互感器内部磁场分布更为合理，线圈中磁场的增强有助于进一步减小铁心的体积。

The surface and cross section of uncoated and coated Polyvinyl acetals were analyzed by microscope and SEM, results showed that, the contact angle of the coated fiber decreased in most of the areas of the fibers, the chitosan film on the fibers was thin and uniform. At the same time, there was no residual material in the coating process and the whole process was environmentally friendly.

结果表明，该方法切实可行，通过显微镜和SEM照片对涂覆壳聚糖前后的维纶纤维进行微观分析，发现在化学纤维表面形成的壳聚糖膜薄而均匀，同时增加了化学纤维的表面粗糙度，涂覆效果较好；通过接触角的变化说明纤维的亲水性得到改善；该方法还具有无残留物和对环境友好的优点。

Methods Sixty seven patients with gastric diseases were verifed by pathology and fibro gastroscopy or clinic following up were given abdominal plain CT and contrasted SCT scans.

回顾分析有明确病理与临床诊断的 67例胃部疾病患者的腹部CT平扫与SCT增强扫描时的表现，根据胃部病变增强扫描前后的CT值来评价各种疾病的CT增强情况。

In the paper, we built an ontology on fire apparatus domain, and finished an experiment about the semantic matching for the ontology. According to the result we compared precise degree of the original algorithms with the improved.

本文构建了一个消防装置领域的本体，对该构建好的的本体进行了语义匹配的模拟实验，并对算法进行了改进前后的对比。

The author of Germany before and after the Franco-Prussian War as a background, shaped Heslin this both the suppression of the people's tyrant is a tyrant loyal servant of the image of a profound reflection of the German Empire, the feudal class society, class conflict, social contradictions, biting satire of the German society to the existence of various defects.

作者以普法战争前后的德国作为背景，塑造了赫斯林这个既是镇压人民的暴君又是暴君忠实的奴仆的形象，深刻地反映了德意志帝国封建等级社会的阶级矛盾、社会矛盾，辛辣地讽刺了德国社会存在的种种弊病。

Take an overall view of the Opium War, it is the beginning of China's modern diplomacy, the signs that Chinese feudal society urned into the semi-colonial and semi-feudal society step by step.

本文主要从耆英在鸦片战争前后的禁烟运动、奉天口岸的防堵活动、鸦片战争中耆英的羁縻外交、耆英在广州的外交活动进行全面论述分析，以期对耆英在鸦片战争时期的外交活动有一个整体而全面的认识。

The inscription"776—1896",like the drawing as a whole:the Olympic stadium in a newly designed horseshoe shape,the Acropolis,the girl personifying the goddess Athena and presenting the crown of wild olive intended for the victor,mark the bond between the Games of Antiquity and the first Games of the modern era.

有关第一届奥运会举办前后的故事有很多，其中比较著名的是，由于在是否举行奥运会的问题上与王室意见不一致，希腊首相被迫辞职。第一届奥运会沿袭了古奥运会的体制，没有设集体项目，也没有女运动员的参与。

In the analysis, macroscopic continuous supposition of the traditional continuous medium model is overcome; it is studied and compared the change in the displacement field of the shope during slip before and after being strengthened by the gravel piles, as well as the effects of different pile diameter, space and length of the gravel piles.

该方法克服了传统的连续介质力学模型的宏观连续性假设，对比研究了碎石桩加固前后的土坡在滑动时位移场的变化，以及不同桩径、不同间距、不同桩长对土坡的加固效果。

This paper focused on the noise analysis of hydraulic axial piston pump and the contrast experiment before and after the improved design.

本次设计的主要内容有两个部分：液压轴向柱塞泵的噪声分析和结构的改进，着重于对液压轴向柱塞泵的噪声在改进前后的对比分析。

For a big chunk of credit-card losses; the number of filings (and thus charge-off rates) would be rising again, whether

年美国个人破产法的一个改动使得破产登记急速下降，而后引起了信用卡大规模的亏损。

Eph. 4:23 And that you be renewed in the spirit of your mind

弗四23 而在你们心思的灵里得以更新