电离层

At the first step, time-frequency distribution (spectrogram or pseudo Wigner-Ville distribution) of the time-varying signal is adopted and a peak-tracking scheme is designed to obtain a coarse ionosperic modulation estimation from the time-frequency distribution.

在第一步校正中，首先分析这种时变信号的时频分布，并设计了一种谱峰追踪方法从时频分布中获得粗糙的电离层频率调制估计。

Firstly, we simulate the influence of pump waves on two-stream instability occurred at heights of equatorial ionospheric E region. The simulation results show that pump waves can control the two-stream instability, that's to say, pump radio can stabilized or unstabilized this instability.

首先，模拟了加热泵波对赤道电离层E区双流不稳定性的影响，模拟结果定性地表明，在一定条件下，加热泵波对发生在该区域的双流不稳定性有很好的致稳或不稳作用。

The: effect of time derivative on the electric field and density cavitons which is often absent in many other references is considered in this paper.

这种密度扰动，在电离层中可以激发起各种等离子体波，研究这种相互作用及各种等离子体波，对探测涂有各种雷达波吸收材料的隐身飞行体有着重要的意义。

It was studied with the aid of a one-dimensional time-dependent ionospheric model self-consistently in the continuity,momentum and energy equations.

通常将地球电离层划分为三个区域，最低的称为D层，依次是E层和F层。

Adopting a new self-consistent method, we calculate the energy levels and wave functions of symmetric double-square-quantum-well structures where the electronic density and the depletion lengths in the modulation-doped regions are determined self-consistently according to the properties of the materials and the growth conditions.

采用一种新的自洽方法计算了对称双量子阱的能级和波函数，其中电子密度、调制掺杂区电离层的厚度等参数是根据材料的性质、生长条件等自洽确定的。

It is shown that seismic activities can arouse the earth-ionosphere cavity resonance anomalies from the observation for many years.

多年来的观测研究表明，地震活动可能引发地球-电离层空腔共振异常。

Then it can obviously reduce the frequency and the need of the real time computation of the main station, and the telecommunication between the main station and tracking stations as comparison with the tradition WADGPS.

该系统的特点是降低数据通讯链工作频度和实时性的要求，并通过增设区域性差分基准站来计算卫星相对钟误差和电离层改正，以减少主控站的计算工作量。

The thermosphere and ionosphere are the primary regions of near space satellite in orbit, as well as the important area where space weather affects human activity so much.

地球热层和电离层是近地卫星运行的主要场所，也是空间天气对人类活动影响的重要区域。

The broken hulls of UNSC ships made a bone-yard of the thermosphere.

被击毁的UNSC飞船的船体形成了残骸环绕的热电离层。

On the other hand, data analysis reveals that the ionosphere and its background thermosphere undergo numerous kinds of variations, i.e. the diurnal, day-to-day, semiannual and annual variations.

在另外一方面，大量的研究工作表明，在电离层及其背景大气中广泛存在着各种时间尺度的变化行为，例如典型的周日变化、逐日变化、准27天变化、半年变化、周年变化、准两年变化以及随太阳活动周期的11年、甚至更长周期的变化等等。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。