给出了典型的试验曲线，并分析了“瓦”状塞式喷管的高度特性和底部二次流对性能的影响情况。
The typical experimental curves are showed. The altitude characteristic and the effect of base bleed on aerospike nozzles are analyzed too.
在详细分析一种典型的闭环衰减曲线法的基础上，提出将摄动法用于系统特性发生变化时的参数确定中。
On the basis of analyzing a typical closed-loop damping curve method, this paper proposes a perturbation method used to determine the parameters of a system when its behavior changes continuously.
然后对无锡地区近年来的负荷特性进行了分析，主要对不同年份负荷率、峰谷差、典型行业的日负荷曲线数据进行分析，从中找出无锡地区负荷及负荷特性的特点。
Then it analyses the load characteristics of Wuxi, mainly on load-rate of years and typical daily load data or curves so that we can find the main specialty of the local load.
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