查询词典 anomalous propagation

Combined with numerical simulation, characteristics of wave propagation on a slope and a platform and wave forms are discussed, and the maximum wave pressure, acting position and the maximum wave forces are systematically analyzed. Compar...更多ison of wave forces on a vertical wall with different slopes is made, and a conversion relation is given.

本文在水槽中进行平底、1：5、1：10、1：15、1：20、1：25建筑物前几种不同坡度的规则波模型试验，与数值计算相结合，讨论了波浪在斜坡及平台上传播的特性和波浪形态，对直墙上最大波压强及其作用位置以及最大总压力进行了系统的分析，进行了不同斜坡直墙波浪力的比较，给出了它们之间的转化关系。

A feed forward neural network trained with the back-propagation learning algorithm is used to cl...

研究的目的是将图像处理技术集成到传统的船舶导航设备中。

The transition from opacity to transparency of overdense plasma layers for the propagation of high-intensity laser pulses of circular polarization is investigated theoretically and by simulation.

在圆偏振高强度激光脉冲的传播过程中，对稠密等离子体层从不透明向透明的转变从理论上和以模拟的方法进行了研究。

It is shown that the M×N ChG beams in turbulent undergo three stages of evolution with increasing propagation distance,and turbulence accelerates the evolution of three stages.The turbulence results in a spreading and degradation of the maximum intensity in the far field.But β-parameter decreases with increasing beam numbers M,separate distances xd and beam parameter δ.And there exists optimal values of xd and δ,and SR of the corresponding M×N ChG beams reaches its maximum.

研究表明：在湍流大气中，双曲余弦高斯列阵光束的传输将经历三个阶段的变化，并且湍流使得光束传输经历三阶段的进程加快；湍流导致双曲余弦高斯列阵光束扩展、最大峰值光强下降，但是，β参量随光束数目M、相邻子光束间距xd和光束参量δ的增加而减少，即光束扩展受湍流的影响减小；并且，存在最佳xd和δ值使得Strehl比取得极大值。

During the 1950's and 1960's, the propagation of Buddhism in United States was characterized by its combination with counter-culture movements, triggered by the artists of the Beat Generation.

20世纪50、60年代佛教，尤其是禅宗思想在美国传播和发展与反文化运动结合在一起，其始作俑者是&垮掉的一代&。

The concept, propagation properties, production and applications of the Bessel beams are systematically reviewed and studied.

系统、全面地研究了贝塞尔光束的概念、传输性质、产生方。。。

In the time domain, generation and propagation of aerodynamic noise are simulated using the two-step method and CAA respectively .

在时域内分别采用&两步法&及计算气动声学方法对气动噪声的产生及传播进行了数值模拟。

This artificially induced plasma depletion can then be used to investigate other space phenomena, such as the growth of the plasma instabilities or the modification of radio propagation paths. The 47 second OMS burn of July 29, 1985, produced the largest and most long-lived ionospheric hole to date, dumping some 830 kg of exhaust into the ionosphere at sunset. A 6 second, 68 km OMS release above Connecticut in August 1985, produced an airglow which covered over 400,000 square km.

这一人工诱导离子损耗之后能够被用于研究其他的太空现象，比如离子不稳定性的增长或者无线电传播通道的改变。1985年7月29日47秒的轨道操纵系统的燃烧产生了迄今为止最大和最长期的电离层空洞，将大约830公斤的废气在日落时倾倒入电离层。1985年8月康涅迪格上空6秒种、68公里的轨道操纵系统的排放产生了覆盖40万平方公里的气辉。

In section one, by using FICE scheme and TIME-GCM, a model of trace gases and OH airglow affected by gravity wave is set up, then the propagation of nonlinear gravity wave and the effect on trace gases and OH airglow are analyzed. The result shows gravity wave excited by tropospause forcing can propagate stably to the mesosphere through the stratosphere so that energy and momentum can be transferred from one region to another. In this process, gravity wave undergoes growth, overturning, convection and breaking. And the no-isothermal structure can accelerate the breaking of gravity wave in mesospause, and the breaking of gravity wave is an important source of convection and small-scale waves.

在第一部分的工作中，利用全隐欧拉格式和全球热层-电离层-中间层-电动力学环流耦合模式，对重力波的非线性传播及其在传播过程中对中高层大气中氧族和氢族成分和与之密切相关的OH气辉辐射的影响进行了数值模拟，结果表明，从对流层向上传播的重力波经历了产生、发展、饱和、对流产生直至破碎的非线性演化，大气的非等温结构加速了重力波在中层顶区的破碎，重力波的非线性传播是小尺度对流和湍流产生的一个重要的源。

Gravity wave and ozone are two interesting topics in the middle and upper atmosphere. In this dissertation, they are studied by numerical simulation and instrument development respectively.In section one, by using FICE scheme and TIME-GCM, a model of trace gases and OH airglow affected by gravity wave is set up, then the propagation of nonlinear gravity wave and the effect on trace gases and OH airglow are analyzed. The result shows gravity wave excited by tropospause forcing can propagate stably to the mesosphere through the stratosphere so that energy and momentum can be transferred from one region to another. In this process, gravity wave undergoes growth, overturning, convection and breaking. And the no-isothermal structure can accelerate the breaking of gravity wave in mesospause, and the breaking of gravity wave is an important source of convection and small-scale waves.

中文题名气辉的非线性重力波研究及臭氧总量探测仪的研制副题名外文题名 The study of airglow by nonlinear gravity wave and the development of the total ozone spectrometer 论文作者王咏梅导师刘振兴王英鉴学科专业空间物理学研究领域\研究方向学位级别博士学位授予单位中国科学院空间科学与应用研究中心学位授予日期2003 论文页码总数88页关键词臭氧气辉重力波馆藏号BSLW /2003 /P421 /7 重力波和臭氧是中高层大气中研究的两大热门课题，本文分别从理论模式和仪器研制两方面对它们进行了研究。

A carrier gas such as nitrogen is directed through line 20 and valve 22 to connect with line 26 and mix with the gas sample.

如氮气之类的载体通过管线20和阀22引入，与管线26相通，与气体样品混合。

But for the most part, knaves and parasites had the command of his fortune

然而支配他的家产的大多是恶棍和寄生虫。