查询词典 stationary

Periodic fluid pulsation in aeroplane hydraulic piping could induce fluid-construction vibration and lead to fatigue damage. It is impossible to find the error sensor's optimization location because of the pressure standing wave, and the pulsation attenuation effect is not perfect when adopting pulsation attenuation at single point. For this reason, a distributed active control method of fluid pulsation was presented. To avoid stationary point in all aviation states, several fluid pulsation actuators and error pressure sensors were placed along the piping. The second fluid pulsation produced by actuators can counteract the primary pulsation brought by aviation piston pump and make the mean pulsation of whole piping minimum when adopting adaptive feed- forward control and the filtered-X least mean square algorithm.

针对飞机液压能源管路系统中的周期性流体脉动诱发流固耦合振动，导致管路疲劳损伤的问题，针对管路中存在压力驻波特性，在采用单点消振时寻找误差传感器最佳布局位置困难而引起脉动抑制效果不理想的缺点，提出了一种分布式流体脉动主动控制方法，即沿管路不同位置布置多个主动消振阀和误差压力传感器，在任意飞行阶段，避开压力驻波点，以误差压力传感器的脉动测量值为控制目标，采用一种针对周期脉动主动控制的自适应前馈控制法和多通道自适应滤波－X LMS算法，调整控制器参数，使主动消振器产生的次级脉动与管路中的初始脉动相互抵消，达到整个管路中的平均流体脉动最小的效果。

Unlike most of the existing schemes, this paper presented a novel quasi direct power control method for PWM rectifier in stationary frame based on instantaneous power theory.

通过分析电压型PWM整流器的瞬时功率，在两相静止坐标系下提出一种新型的准直接功率控制策略。

Secondly, the stationary responses of non-linear systems with unilateral constraints are studied by using the quasi-conservative averaging method.

基于非光滑线性系统研究的基础上，借助一种非光滑变换，引进狄拉克函数，把随机单边约束非线性系统转化为光滑随机非线性系统，进而运用拟保守平均方法得到转换的光滑随机系统的平稳响应。

Even for speech signals, their behavior is not static; at best they can be considered quasi-stationary.

按照音频在计算机内部表示形式的不同，音频可以分为自然音频和合成音频两类。

The distribution of the grain edge lengths maintains self-similarity in the period of quasi-stationary grain growth.

不同时刻的晶粒长大仿真数据表明，在准稳态晶粒长大阶段晶粒棱长的分布具有自相似性。

The corresponding grain size distribution curve is very similar with those of available theoretical quasi-stationary grain size distributions in literature.

将该函数与Liu等提出的2种三维准稳态晶粒尺寸分布函数进行的对比表明：此3种函数的解析表达形式有所不同，但其曲线图在一定条件下相互吻合。

Due to competing steering directions, LINFA remained quasi-stationary in the past 24 hours.

由於净驶流力度不高，莲花於过去 24 小时移动缓慢。

In Chapter 5 and 6, a suite of calculation method of branch model and their parameters, which can fully consider the effects of various spatial harmonics, is worked out. In the last chapter, the calculation method of the asynchronous starting characteristics of the new type machines at quasi-stationary state have been discussed in details.

第四章则针对变极凸极同步电机的特点，通过对其气隙磁场谐波性质及其作用的分析，得出了若干具有理论和实用价值的结论，在此基础上，第五、六两章则提出并建立了一套能够充分考虑各种性质空间谐波影响的支路模型及其参数计算方法。

Based on general ground observation data and NCEP data, the atmospheric circulation and the structure of Dian-Qian Quasi-stationary Front during Jan. 2001 are studied.

利用地面常规观测资料和NCEP/NCAR再分析资料，分析2001年1月的滇黔准静止锋在演变过程中的温湿结构和大气环流特征。

HAGIBIS remained quasi-stationary in the past 24 hours.

海贝思于过去24小时徘徊在南海中部，几乎停留不动。

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