衰减器

A non-linear mathematical model is presented herein to describe the dynamic performance of the governing system for station, and furthermore, the additional index to evaluate the governing performance of the pump-turbine is put forward, that is that the selection of the governor parameters must promote the quick attenuation of the fluctuation of the water level in the surge tank.

文中提出了描述抽水蓄能电站调节动态特性的非线性数学模型，提出了衡量水轮机调节性能质量的附加指标－调速器参数的选择应促使调压室水位波动的快速衰减。

By setting up the mathematical models of the regulating objects （combusting heat transfer, heat utilization and storage, superheater and main steam pipe line）, by combining heat transfer function of regulating system and by selecting method of setting PID accoding to set attenuation index object, the corrections among PID and pulverized coal＇s caloric values are found. Now the PID can be set according to caloric values of the pulverized coal burned in the unit and the automatic control can be put into operation.

通过建立调节对象四个环节（燃烧传热过程、热量的利用和储存过程、过热器、主蒸汽管道）的数学模型，结合调节系统的传递函数，选用按给定衰减指数设定PID参数的方法，找出PID参数与煤粉热值的关系式，最终达到在机组燃烧不同热值的煤粉时可依据该方法设定不同的PID参数、并都能投自动的目的，从而有利于提高机组的稳定性，并可节约煤粉。

Note: The position of these ground locators can be adjusted later to tweak the falloff of the shadow attenuation.

注意：那些地面上的定位器的位置能稍后时被调整去配合阴影衰减的散开。

And Pharaoh spoke to Joseph, saying, Your father and your brothers have come to you.

47：5 法老对约瑟说，你父亲和你弟兄们到你这里来了。

Additionally, the approximate flattening of surface strip using lines linking midpoints on perpendicular lines between geodesic curves and the unconditional extreme value method are discussed.

提出了用测地线方程、曲面上两点间短程线来计算膜结构曲面测地线的方法，同时，采用测地线间垂线的中点连线和用无约束极值法进行空间条状曲面近似展开的分析。