1) sky-wave propagation
天波传播
1.
When the foe implements the directed tracking jamming on the short-wave frequency hopping(FH) radio station with sky-wave propagation,the relationship of jamming ellipse won t be met with,and the new relation will be studied by jamming equation.
敌方在对进行天波传播的短波跳频电台实施引导跟踪干扰时,将不再满足干扰椭圆的关系,而需要重新通过干扰方程进行研究。
2) radio wave propagation of antenna
天线电波传播
3) sky wave propagation for low frequency
低频天波传播
4) wave propagation
波传播
1.
Study on the Characteristic of Wave Propagation and Damage in Non-Consecutive Joint Media;
非贯通节理介质波传播特性和损伤特性研究
2.
The free transverse vibration in an axially moving beam on fixed support is investigated by wave propagation.
用波传播法分析研究了两端固支轴向运动梁的横向自由振动。
3.
Based on the matrix formulation of Hamilton s principle,the basic equations with elastic wave propagation in the layered piezoelectric cylindrical bars were obtained.
基于Hamilton原理的矩阵形式,得到带压电层圆柱形杆中波传播的基本方程式;采用幂级数的不同幂次近似方法表达杆件中的位移函数;通过变分求得特征方程式;进而求得弹性简谐波在带压电层的圆柱杆件中传播时的频散关系和位移场。
5) transverse wave propagation
横波传播
1.
The influences of initial stress on the vibration and transverse wave propagation in carbon nanotubes under ultrahigh frequency (above 1THz) were investigated.
本文研究初始应力对碳纳米管在极高频率(大于1THz)下横波传播的影响。
2.
The transverse wave propagation in carbon nanotubes/polymer composites laminated structures under ultrahigh frequency(about 1THz)was studied based on the multiple-elastic-beam model.
通过多层弹性梁模型研究了碳纳米管/聚合物复合材料层合结构在高频率(1 TH z左右)下的横波传播,分析了碳纳米管的体积分数和手性对其传播的影响。
6) Wave propagation
波的传播
1.
The wave propagation phenomena of the longitudinal wave in the bars,the flexural and shear waves in the beams were also analysed.
分析了杆中的纵波、Timoshenko梁中弯曲波及剪切波的传播现象。
2.
Axisymmetric wave propagation and attenuation along viscoelastic cylind rical tube for a given boundary are investigated within the framework of linear viscoelasticity.
本文在线性粘弹性模型框架内研究了一定边界条件下无限长粘弹性圆柱管中轴对称波的传播和衰减。
3.
One_dimensional wave propagation in column under step loading and impulsive loading are analyzed with the developed finite element program.
采用基于混合物理论的多孔介质模型，给出流体饱和两相多孔介质波动问题的有限元分析方法· 采用罚方法导出的有限元动力方程，时间积分可采用显式和隐式积分两种方案· 用编制的有限元程序分析了一维柱体在跃阶载荷和脉冲载荷作用下的波传播问题，得到该两种瞬态载荷作用下固体和流体相位移、速度以及固体相有效应力和孔隙压力随时间的变化关系，并对波的传播现象进行了分析· 所得结果与理论相吻合
补充资料：低频天波传播
| 低频天波传播 low frequency，skywave propagation for 地面发射的频率为30～300千赫的无线电波，经电离层反射再回到地面的传播方式。在白天，反射区为低电离层的D层；在夜间为E层底部。传播距离可达几千千米。低频天波在授时、导航、通信、广播，以及低电离层特性研究方面都有广泛的用途。在太阳宁静期间，无论是在白天还是夜间，天波信号的幅度和相位都比较稳定。太阳耀斑爆发期间太阳辐射很强的X射线，使D层电子密度急剧增加，天波等效反射高度降低，相位急剧超前，幅度也发生变化。对于很大的耀斑，天波相位时延超前10微秒左右，耀斑结束后，天波信号逐渐恢复正常。 |
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条