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- ground wave attenuation 地波衰减因子
- Influence of Acoustic Wave Attenuation on the Properties of Fiber AOTF[J]. 引用该论文 厉群;刘小明;李佟;金韬;周炳琨.
- The simulation of bistatic/multistatic HF ground wave radar echo is analyzed. 摘要分析了双／多基地高频地波雷达回波信号的仿真过程。
- The millimeter wave attenuation of expanded graphite is a comprehensive actions of scattering and absorption. 膨胀石墨蠕虫对毫米波的衰减为散射和吸收作用的综合结果。
- Wave attenuation properties of rectangular pontoon breakwater were analyzed with eigen-function expansion. 利用特征函数法对矩形浮箱式防浪堤的消浪性能进行分析。
- In this method, Stoneley wave attenuation from AC log is divided into two parts: attenuation through porous media and percolation attenuation through pore-fluid. 该方法把由声波测井数据得到的斯通利波衰减分为介质内衰减和孔隙流体渗流衰减两部分。
- Attenuation factor of ground wave propagation across the rough sea 随机粗糙海面上地波传播衰减因子
- A three dimension polarization filtering algorithm is put forward to suppress th e skywave interference in HF ground wave radar. 以高频地波雷达为背景，提出了三维极化滤波方法，此方法能够滤除二维极化滤波不能抑制的干扰，扩大极化滤波的干扰抑制范围。
- An ocean echo signal simulation system for verification and calibration of FMICW high frequency ground wave radar is presented in this paper. 该文给出一种调频中断连续波(FMICW)高频地波海况监测雷达的仿真模拟检验系统。
- Ultrasonic wave attenuation measure is an important method of researching the energy absorptance of rock. It relates with the variation of rock microcrack and is one of subjects to be researched continuously in rock area . 声波衰减是研究岩石能量吸收性质的主要方法，它与岩石内部微裂纹及其变化有着密切联系，是岩石领域需要深入研究的课题之一。
- SDA is especially meaningful because it is the first event to awards honors to dramas from all three ground wave stations. 除了韩国三大电视台的综合选送作品外，我们也非常注重颁奖典礼的公正性。
- It is also shown that there is a minimum shothole depth for given conditions including thickness and lithology of shot layer, low end frequency of effective signal, and wave attenuation steepness in time domain. 结果表明 ,对给定的激发层厚度、岩性、有效信号低端频率和波的时域衰减陡度 ,存在一个最小井深 Hmin。
- The paper introduces the method of the HF ground wave radar to pick-up the usable information, gives the detailed scheme to obtain the simulant echo. 文章首先分析了雷达回波信号中有用信息提取方式，给出了模拟回波信号的实现方案；
- Fourier-transform-infrared(FTIR) and millimeter wave(MMW) are applied to study the ele- ctromagnetic waves attenuation by the aqueous foams. 摘要 采用傅里叶变换红外透射光谱法和毫米波反射截面及透射率法，研究了水基泡沫的电磁波衰减性能。
- In this paper, signal preprocessing for bearing determination of ocean surface radial current mapping by HF ground wave radar based on MUSIC is investigated. 阐述从高频地波雷达海洋回波反演海洋表面流中,使用MUSIC算法提取径向流方位必须的信号预处理。
- The thicker the shell of a warhead, the larger the attenuation exponential, and more promptly the peak pressure of explosive air shock wave attenuates with the distance. 结果表明，爆炸空气冲击波峰值随距离的衰减指数与壳体厚度近似成线性关系。
- The fox went to ground under a rocky escarpment. 狐狸钻进了石崖下面的洞里。
- However, radio waves attenuate as they move out from the transmitting antenna. 然而，无线电波随者从传送的天线向外移动而衰减。
- It is one of the key techniques how to correct the additional second-phase factors (ASF) which indicate the affection of land on the speed of ground wave for developing the accuracies of timing and navigation of Loran-C signal in long-wave. 如何修正用以表征陆地对罗兰C信号电波(地波)传播速度影响的附加二次相位因子(ASF),是提高长波无线电导航定位和高精度授时的关键技术之一。
- In this paper,nuclear explosion X ray spectra,initial parameters of the pulse stress waves in aluminium exposed to the X rays and stress wave attenuation along the thickness are estimated by using some simple analytical models. 并以简化模型估算了核爆X射线谱的特征、X光辐照铝靶产生的脉冲应力波的初始参数及其沿铝靶厚度的衰减特性
