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The system periodically evaluates the static security andtransient stability based on on-line information, which is integrated by state estimation in EMS, the real time actual network data telemetered from control substations, and the typical network operation mode data, selects the optimum generators and load to be shed, accordingly to refresh the control decision tables in two different area control substations every 5 minutes.

河南电网多区域安全稳定紧急控制在线预决策系统综合利用EMS 在线数据、安控实测数据、电网典型运行方式数据，全面定量评估电网安全稳定性（暂态功角稳定和潮流越限），优化紧急控制决策并在线刷新多个区域安全稳定控制系统策略表。

It undulates along the time axis and roughly appears in clusters periodically.

在时间轴上有起有伏，大致呈周期性聚丛活动图象。

It is a widely existent phenomenon that the working torque moment of theConform machine main shaft undulates periodically.

CONFORM机主轴工作扭矩周期性波动是一种普遍存在的现象。

During use, the composition of thinner shall be volatilized, so the reinforce of M-2012# periodically shall be necessary.

使用时由于稀释剂的成份会在使用过程中挥发掉，故应定期补充M-2012#稀释剂。

The experimental results showed that the frictional factor periodically fluctuated with the time variable, and its amplitude was obviously affected by the change of Reynolds number and pipe diameters. The amplitude and average value of frictional factor both decreased with the increase of Re number, but the bigger the tube diameter was, the larger the amplitude of frictional factor was.

经实验研究发现，试验段内的摩擦阻力系数随时间变化有明显的周期性，雷诺数增加导致摩擦阻力系数的波动幅值降低、平均值减小，管径越粗使得摩擦阻力系数边的波动幅度越大。

It has been found that the system could appear steady and maximal entanglement state periodically through modulating the squeezing coefficient, the coherent amplitude factor and the ratio of detuning to coupling constant.

发现调控光场压缩参量、相干态振幅参量及失谐量与耦合系数之比，可以得到系统稳定的最大纠缠态，且此态具有明显的周期性。

The Circulation-hydrogenation Compressor Model BLC-305/A is an important equipment with Hydrogenation devices, which is imported by Lanzhou Petrochemical Company Refinery. Due to high-speed rolling periodically, the spare parts of this compressor, to a varying extent, show a lot of signs of wear and tear. Especially, the axle sleeve of the rotor axle of the compressor is so worn to the greatest degree that its work efficiency decreases by a big margin. Machinery Factory of Lanzhou Petroleum Processing and Chemical Complex has undertaken this task to repair the rotor.

BCL—305/A型循环加氢压缩机是兰州石化炼油厂从国外引进的一台用于加氢装置的重要设备，该设备经长周期的高速运转，零部件均有不同程度的磨损，特别是压缩机转子轴上的轴套磨损程度最大，使整机效率大幅度下降，兰炼机械厂承担了这项转子修复任务。

The results show that the microscopical pore structure of the three dimensional orthogonal woven carbon fabric structure perform is composed of body-centered cubes which arranged periodically at spaces. The net structure and shape of the pores of perform are determined by the size and proration of the fasciculus diameter, which are key factors influencing the gaseous permeability and final density of composites. Once the proration of the fasciculus diameters of different directions is determined, the trend of diversification of the permeability followed by pore rate during CVI process and the density of composites are stated, and the permeability increases with the increase of the fasciculus diameter.

研究结果表明：三维正交结构炭纤维预制体的宏观孔隙结构在空间上可以看成是由呈周期性排列的体心立方&晶胞&构成； X ， Y 和 Z 3个方向纤维束直径大小及比例关系决定三维正交结构炭纤维预制体宏观孔隙网络的结构和形状，也是决定反应气体在孔隙中的比渗透率和复合材料最终致密度的重要因素；当 X ， Y 和 Z 3个方向纤维束直径的比例关系一定时，不同预制体在CVI增密过程中比渗透率随孔隙率变化的趋势相同；复合材料的最终致密度一定；比渗透率随纤维束直径增大而略有增大。

To moisten periodically with a liquid, such as melted butter or a sauce, especially while cooking.

在…上滴油脂尤指烹调时，间歇地淋上一种液体加以润湿，如溶化了的奶油或酱汁

The dischange ash device should promise refuelling piace to be lubricated periodically,and periodical cleaning because of dust damp cause breakdown of agglomeration and arch camber.

排灰装置要保证加油点定期加油，并定期清除由于粉尘潮湿引起结块和起拱的故障。

I will endeavour to find you some assistance.

我尽力帮你找人帮忙。

At first I only know bruck is the idol of American younglings, afterwards I returned back to Taiwan ,even in Beijing last year ,I saw her poster everywhere, I was so surprised at her charm.

起初我只晓得布鲁克雷德丝是美国少男少女崇拜的偶像，后来回台湾，甚至去年在北京，居然也四处看见她的海报，才惊讶她的魅力之大。