effective attenuation coefficient

According to the transmission of laser beam in seawater, a method of deducing the effective attenuation coefficient ( k eff ) of the transmission from the backscatter waveform of laser beam has been introduced to discuss the k eff of different experiments.

依据机载蓝绿激光脉冲的传输过程，分析了激光束向下传输时返回的后向散射波形，采用从返回信号中提取出海水的有效衰减系数ｋｅｆｆ的方法，并利用测深系统海上实验采集的数据，获得了后向散射波形的有效衰减系数的估算值，并对结果进行了讨论。

Based on the analysis and processing of the test data obtained from the airborne underwater target detection by lidar in China and with Monte Carlo simulation, the effects of the effective attenuation coefficient, atmosphere conditions, wind speed, seawater turbidity, sloping of the underwater target on the airborne oceanic lidar system are studied.

通过对机载激光水下目标探测试验数据的分析和处理，并辅之以必要的蒙特卡罗模拟实验，就有效衰减系数、大气、风速、海水分层、目标倾斜等因素对雷达系统性能的影响进行了研究，总结出适合工程设计使用的近似估算公式和曲线，阐述了试验中出现的异常现象，并给出了合理的解释，还提出了一些需要进一步深入研究的关键问题。

Measuring the ultrasonic attenuation coefficient of flyash scale in the transport pipeline;

输灰管灰垢声衰减系数的测定

Experimental study on integrated attenuation coefficient of organic contaminant (COD_(Cr)) in upper reaches of Hanjiang River;

汉江上游有机污染物COD_(Cr)综合衰减系数的试验确定

Experimental research on attenuation coefficient model of low-frequency wave in oil layer;

低频波在油层中衰减系数预测模型的实验研究

Based on the 2nd Lyapunov method,a notion of decay coefficient was introduced.

基于Lyapunov第二方法引入衰减系数的概念,在此基础上给出保证单个系统稳定的最小网络通讯间隔以及保证多系统同时稳定时网络通讯间隔应满足的条件。

In this paper flight decay coefficient and ballistic limit of several type fragment in common use are computed and analyzed,and affection of fragment shape to velocity decay coefficient and ballistic limit is also analyzed.

文中计算比较了几种常用典型破片的飞行衰减特性及极限贯穿速度;对破片形状对速度衰减系数及弹道极限速度的影响进行了分析;提出了在战斗部结构设计时,选择破片形状应遵循的原则。

The decay coefficient is introduced into showing dispersion of the copper bar.

考虑到样品(铜棒)散热,引进衰减系数,描述温度幅度随频率及传播距离的变化关系。

The experimental results show that a) the attenuation coefficient of velocity is constant and the air drag coefficient is a linear function of initial velocity.

结果表明:(1)破片长距离(120m)飞行时的衰减系数为常数,阻力系数与破片初速成线性关系;(2)在爆轰驱动下,直径为6。

The experimental results show that:(1) for ideal spheres,the attenuation coefficient of velocity is constant,the air drag coefficient is slightly affected by the initial velocity and is a linear function of initial velocity,and(2) for real fragments formed by a warhead,the flight performances are different from ideal spheres,the air drag coefficient is affected by th.

实验结果表明:(1)对于理想球形钨合金破片,在同一初始速度条件下,衰减系数为常数,空气阻力系数与初始速度有关,两者成线性关系;(2)对于经历爆轰驱动的球形钨合金破片,由于有轻微的质量损失和变形,速度衰减规律与理想球形钨合金破片有明显的区别,空气阻力系数与飞行速度有关,两者成线性关系。

The damping rule of vibration along railway is obtained and calculation is made for damping coefficient(0.

通过实测,对这种振波的过程曲线特征进行了描述和分析,指出这种振波的振动频率,幅度范围及振动过程中的脉冲特征;并对振波在硬塑土层中的衰减特征,衰减系数等进行了论述。

The experimental results indicated that the liquid surface wave amplitude declined exponentially with the spreading distance and the damping coefficient,which varied lineally with frequency,has dispersive characteristics.

实验结果表明,液体表面波的振幅随传播距离的增大而按指数型规律减小,并具有明显的色散效应,衰减系数液体表面波的随频率线性增大。

Although calculated wave heights in terms of Binham fluid model theory were smaller compared with the measured characteristic value,the damping coefficients with both kinds of heights were of same order.

结果表明,计算波高小于实测值,但二者的衰减系数为同一量级。

pair production attenuation coefficient

电子对生成衰减系数

pair attenuation coefficient

正负电子对衰减系数

Point and spot lighting usually have attenuation coefficients.

点光源、光灯通常具有衰减系数。

The attenuation coefficient decreases with increasing of frequency and the gas density.

衰减系数随频率增加而减小,并且随密度增加而减小.

Investigation into the Influence of Time Delay of Indoor Fan on the Degradation Coefficient(C_d) of Air Conditioner

室内风机延时对空调衰减系数C_d影响的研究

STUDY ON ATTENUATION COEFFICIENT OF CODA WAVES FOR TWO M_S5.0 EARTHQUAKES IN NORTHERN TIANSHAN MOUNTAIN,XINJIANG

新疆北天山2次5级地震的尾波衰减系数研究

A Method of Calculating the Coefficient of Atmospheric Average Attenuation for Certain Spectral Waveband

一种计算某一波段大气平均衰减系数的方法

Measurement of the attenuation coefficient of surface acoustic wave by means of the light diffraction

衍射法测量低频液体表面波的衰减系数

Power Attenuation of Plasma Antenna Excited by Surface Wave

表面波等离子体天线的能量衰减系数研究

Some Reasonable Converted Formulas of The Often-used One of Coaxial Cable's Attenuation Quotient in Engineering Designs

对同轴电缆衰减系数工程上常用公式的改进

Distribution of beam attenuation coefficient in Taiwan Strait in August 1997～1999

台湾海峡1997年8月至1999年8月份海水光学衰减系数的分布特征

Research of Measurement of the Total Attenuation Coefficient of Biological Tissue with Optical Coherence Tomography;

基于光学相干层析成像技术的生物组织总衰减系数测量研究

Natural Desorption Rate and Attenuation Coefficient of Coal Seam Gas and its Significance

煤层瓦斯初始自然解吸速率和衰减系数及其意义

Seasonal characteristics of the diffuse attenuation coefficient of Meiliang Bay waters and its primary contributors

太湖梅梁湾漫衰减系数季节性差异及其主导因素

Characteristics of the Diffuse Attenuation Coefficient and Its Impact on Aquatic Ecology Environment

太湖水体漫衰减系数特征及其对水生态环境影响分析

Optical properties and remote sensing retrieval model of diffuse attenuation coefficient of Taihu Lake water body

太湖水体漫射衰减系数的光学特性及其遥感反演模型

Application of Digital Attenuator in Radar DAGC

数控衰减器在雷达DAGC系统中的应用

Exponential Decay of Thermoelastic Plate with Variable Coefficients and Dynamic Boundary

具有动态边界的变系数热弹性板的指数衰减性