The preliminary results about anomalous fading of fine-grained polymineral IRSL signal Chinese loess during the Last Glacial Period are reported.
对洛川末次冰期的黄土细颗粒混合矿物红外释光(IRSL)信号异常衰减行为的初步研究结果表明:1)预加热只能部分消除异常衰减对等效剂量测定的影响,不能完全消除这种影响,IRSL异常衰减过程也许存在着热效应和非热效应两种组分;2)对16个已知年龄的马兰黄土(15～70ka)样品细颗粒混合矿物天然IRSL信号的ED值与期望ED值的比较初步显示,马兰黄土细颗粒混合矿物IRSL信号异常衰减不断发生,导致混合矿物IRSL的年龄测定值可能被低估达20%以上。
The relation of directions of phase constant and attenuation constant in conductive media;
导电介质中电磁波相移常数与振幅衰减常数的方向关系
The electric properties of coaxial cable, such as its characteristic impedance, screening attenuation, attenuation constant, and loss of echo wave, are related to the physical mechanism of the skim effective resistance, electromagnetic field, distribution par.
同轴电缆的特性阻抗、屏蔽衰减、衰减常数、回波损耗等电气性能 ,涉及到趋肤效应、电磁场、分布参数等物理机制。
By the experiments,factors that effect decay of residual chlorine that happens in bulk water are analyzed and observed that the bulk decay constant changes associated with the water temperature,initial chlorine concentration,and total organic carbon.
通过观察发现,主体水余氯衰减常数(k_b)随温度(θ)、初始氯质量浓度(C_0)以及有机物质量浓度(TDC)而有显著变化。
In this paper laser excited(excitation at 266nm) fluorescence decay constants of YAP:Ce scintillation crystals with different sizes and various Ce~(3+)dopant concentrations were measured.
用波长为266nm的激光激发不同尺寸、不同掺Ce3+浓度的YAP:Ce闪烁晶体,测量其光致激光荧光衰减常数,测量结果表明:YAP:Ce闪烁晶体的光致荧光衰减常数约为18。
The characteristic impedance,acoustic theory,absorption coefficient and decay constant of the sound absorption functional rubber were introduced,and their research progress and applications were investigated.
介绍了吸声功能橡胶的特性阻抗、吸声原理、吸声系数和衰减常数,以及吸声功能橡胶的研究现状和应用,并展望了其发展方向。
Analysis of attenuation coefficient and cutoff character in waveguide by finite difference method;
波导截止特性和衰减常数的有限差分分析
We compared the theoretical attenuation coefficients of THz radiations with different incident frequencies in hollow circular waveguides with a bore diameter of 2mm with different metallic coating films of Au,Pb and Ni,and,for a given incident frequency,calculated the relationships between attenuation coefficients of the dominant mode TE11 and the bore diameters of hollow wav.
比较了在内直径为2mm的空芯圆波导中分别镀金、铅、镍不同金属时不同入射频率的太赫兹波的理论衰减常数,计算了镀不同金属而入射波波长一定的情况下波导中主模即最低模TE11模的衰减常数随波导内直径的变化情况。
This paper describes the application of finite difference method and Fortran program to obtaining the cutoff frequency and attenuation coefficient in isosceles right triangular waveguide and pentagonal waveguide.
用有限差分法计算等腰直角三角形波导和五边形波导的截止频率和衰减常数,用Fortran进行编程,计算结果与参考值非常吻合。
Methods of measurement of attenuation constant for radio-frequency cables
GB/T4098.4-1983射频电缆衰减常数测量方法
The effect of passive decay rate constant? gain coefficient and space surround constant were analyzed.
分析衰减常数、益系数和空间常数对图像增强处理的影响。
Test methods for communication cable--Attenuation coefficient test--Open and short circuit method
GB/T5441.7-1985通信电缆试验方法衰减常数试验开短路法
Test methods for communication cable--Test for frequency characteristic of attenuation coefficient of coaxial pair--Comparison method
GB/T5441.8-1985通信电缆试验方法同轴对衰减常数频率特性试验比较法
This paper determines the propagation constant and the increase of attenuation, due to curvature of the axis of Bragg fibers.
本文从传输损耗的角度出发,导出了Bragg光纤的相位常数及衰减常数的公式。
Point and spot lighting usually have attenuation coefficients.
点光源、光灯通常具有衰减系数。
Radioactive decay of the nuclides in the process of the gravitational constant decrease
核素在引力常数减小过程中的放射性衰变
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
average logarithmic energy decrement
平均对数能量衰减率
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
Clinical Analysis of 257 Cases of Chronic Heart Failure with Preserved and Deteriorated Ejection Fraction;
左室射血分数正常及减损的慢性心力衰竭257例临床分析
Handheld microphones usually have their low frequencies intentionally rolled-off.
手持话筒通常有意的做低频衰减。
Decay Estimate for 2-D Steady Euler Equations
二维定常Euler方程组解的衰减性估计
To decrease gradually in size, amount, intensity, or degree; decline.
衰落体积、数量、密度或程度的逐渐减小；衰退
Store spot lighting attenuation function in a texture.
将聚光灯的衰减函数存在到纹理内。
The stress-relaxation modulus is a continuous, decreasing function.
应力松驰量为连续衰减的函数。
The frictional dissipation will introduce an exponential decay.
摩擦耗散可导致指数式的衰减。