查询词典 meteor stream

News: Savor the Shooting Stars -- Geminid Meteor Shower Peaks Tonight - Savor the Shooting Stars -- Geminid Meteor Shower Peaks Tonight...

新闻：品尝的流星--流星雨高峰今晚geminid -品尝的流星--流星雨高峰今晚geminid来自行星消息

An effective approach based on MTI filtering to eliminating nontransient meteor trails interference is presented using the theory of eigen subspace after analyzing the feature of the meteor trails in detail.

针对流星余迹干扰的特点，利用特征子空间理论，提出了有效消除非瞬态流星余迹干扰MTI滤波的方法。

However, the NASA Web site quotes meteor expert David Asher from the Armagh Observatory in Northern Ireland as saying that people "are probably seeing the Taurid meteor shower."

北爱尔兰阿尔马天文台的流星专家戴维·阿舍尔表示，人们看到的火球可能是金牛座流星雨，这种流星雨往往会在每年10月底到11月初这段时间里出现。

The spectrum analysis shows that ① Infrasonic waves produced by meteor are mostly very short, lasting one to five minutes;②Periods of the infrasonic waves range mostly from 40 to 408 seconds, and a few waves range from 40 to 480 seconds;③ During 7:21 p.m. to 8:41 p.m. on Nov. 17, the infrasonic waves were much denser. After 8:41 p.m., the waves become more and more sparse, all waves conform to those observed with naked eyes;④ Amplitudes of infrasonic waves from meteor differ significantly from each other (weaker ones below 5 to 10 Pa, medium ones from 10 to 20 Pa, and stronger ones from 20 to 40 Pa). Two of the strongest ones reach 75 Pa and 50 Pa respectively around 7:28 p.m. and 8:07 p.m. on Nov. 17. An explanation of above results is given.

频谱分析结果表明：①各流星产生的次声波大都很短暂，持续时间为1~5min；②流星次声波的周期大都在40~408s；③在1998年11月17日19：21-20：41期间流星次声波仍很密集，20：41后才变得越来越稀疏，恰与肉眼观测结果相符；④流星次声波的振幅彼此相差很大，较弱的在5~10Pa，中等的在10~20Pa，较强的在20~40Pa，最强的两个波在11月17日19：28和20：07前后分别达到75Pa和50Pa。

The phenomenon caused meteor particles called meteoroids, so meteor and meteoroids are two different concepts.

造成流星现象的微粒称为流星体，所以流星和流星体是两种不同的概念。

You can run across meteor scatter anytime, but the best time to try for it is during one of the yearly meteor showers that brings out stargazers.

您能跑横跨飞星消散任何时候，但最佳的时候尝试为它是在逐年流星雨的当中一个期间提出stargazers 。

Caption:: This photo is taken by a fisheye lens, captured the aurora display and a meteor. Tonight is the annual Perseid Meteor Shower, please keep an eye on the night sky!

这照片是利用鱼眼镜拍下的极光与流星照片，今天晚上也即将上演英仙座流星雨，大家要密切留意！

During the process, the product stream is subjected to an interstage distillation step, thereby removing at least a portion of the alkylate from the product stream before the product stream is introduced into a downstream reactor.

在该方法中，产物流在进料到下游反应器之前，进行级间蒸馏步骤，由此从产物流中脱除至少部分烷基化物。

Compared to wet season, arsenic is difficult to mobile in dry season. Attenuation constant in dry season is 0.3082(1/km), but it is 0.0569(1/km)in wet season. If initial concentration of As was 500μg/L without other contamination source in down stream, arsenic would deceased to 50μg/L in down stream 7.5km in dry season but 40km in down stream 40km. As is dominate species in river running throμgh mining area.

砷在枯水期较丰水期难以迁移，通过计算得到，在枯水期砷的衰减系数K值为0.3082(1/km)，而在丰水期为0.0569(1/km)；在污染口浓度达到500μg/L时，下游没有其它的砷的污染源(或会影响砷衰减的其它污染源)时，枯水期砷会在下游7.5km之后浓度降到50μg/L，而丰水期则要在下游40km之后才能降到同样的值，所以在丰水期砷污染的影响的流域更广。

An apparatus for bit stream buffering and demultiplexing for a DVD Audio decoder system uses one demultiplexer to demultiplex both audio program stream and audio still video program stream.

本发明公开一种用于DVD音频解码系统的位流缓冲和多路分用设备，其使用一个信号分离器对音频程序流和音频静止视频程序流进行多路分用。

So it was last week in Selma , alabama.

上星期在亚拉巴马州塞尔马市发生的事件也是这样一个转折点。

The group also spearheads various social programs in China.

该组织还带头参与中国的各种社会活动。