1) Coefficient of flood peak attenuation
洪峰衰减系数
2) peak flow attenuation
洪峰流量衰减
1.
this paper analyses the causes,rainstorm characteristics,flood process,flood feature and period and peak flow attenuation of the rainstorm happened in of August 2007 in Laohushan River of Chaoyan,liaoning Province.
分析了2007年8月发生在辽宁朝阳老虎山河的暴雨洪水的成因及暴雨特性、洪水过程、洪水特点及重现期和洪峰流量衰减原因;有益于掌握该流域暴雨及特性、洪水的形成条件及洪水特性和规律,为该小流域综合治理提供科学依据。
3) Flood peak coefficient
洪峰系数
4) attenuation coefficient
衰减系数
1.
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
2.
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
3.
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
5) decay coefficient
衰减系数
1.
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。
2.
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。
3.
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。
6) attenuation coefficient of velocity
衰减系数
1.
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。
2.
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。
补充资料：电离辐射衰减系数
电离辐射衰减系数
ionizing radiation attenuation coefficient
式中/0为没有防护层(d=0)时的电离辐射强度;I是防护层厚度为d时的电离辐射强度;刀为电离辐射衰减系数。如果d以线性厚度厘米为单位，则召以厘米一’表示。 刀是物质防护能力的度量。召值的大小取决于防护层物质的特性和电离辐射的能量。物质的月值越大，防护性能越好。物质的防护性能常用衰减倍数K表示。衰减倍数是屏蔽前的剂量D。与屏蔽后的剂量D之比，K二D0/D。将单向粒子流的辐射量减少到初始值一半时的减弱层厚度，称为半厚度，亦称半值厚度或半值层，记作心:。dlZ=住693/拜(厘米)。某些物质对早期核辐射Y射线和中子流的半厚度如表所示。 几种物质的半厚度单位:厘米卜洲扭 已知防护层厚度d和半厚度叭2，可计算其衰减倍数K: K=2脚rtllZ=2”式中n为防护层物质的半厚度数，n=d/试2。反之，为获得预定的衰减倍数K，可按公式n一InK/0.693来计算半厚度数n。根据防护层厚度斌半厚度峨:、衰减倍数K及通过防护之前的剂量D。可计算出工事内核辐射剂量D: D=几(l/酬=几K一‘ (陈冬英)dionli fushe shuaiiian xishu电离辐射衰减系数(ionizing radiationattenuation coefficient)电离辐射通过介质时强度相对变化的表征量。军事上常见的日粒子、Y光子之类的电离辐射通过物质时，它的强度近似按指数规律衰减: I=去e一召d
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