变化系数

Apart from these, another conclusion was drown by the author that the increase of surface energy due to the deformation after the adhesion shearing at the asperities and the viscoelasticity of polymer films is the main reason why the friction coefficients of polymer films vary with the sliding speed.

还有一条重要研究结果是，作者认为，由于聚合物薄膜受摩擦作用而发生变形以及由于聚合物的粘弹性造成变形回复的滞后而造成聚合物表面能的增大，是聚合物摩擦副的摩擦系数随相对滑动速度的变化而变化的根本内因。

The scale-value, which is converted from the bore-hole strain, by nse of the observed values in tidal frequency band of the bore-hole strain and the elastic coefficients of the bore-hole corescan can be used for coverting non-tidal variation of the bore-hole strain into variation of the non-tidal stress of the same stratum.

顾梦林 ，杨毅，骆鸣津利用钻孔应变观测值中潮汐频段部分和钻孔岩芯的弹性系数，将钻孔应变换算为地层应力的格值，用此格值可将钻孔应变的非潮汐变化换算成该地地层的非潮汐应力变化。

The annually released amount of N, P, and K in dead roots and fallen needles was 5.41-36.5 kg/hm2, 2.86-25.77 kg/hm2, 3.1-15.73 kg/hm2 and 11.51-28.02 kg/hm2, 13.99-33.23 kg/hm2, 6.84-14.35 kg/hm2. The contents of N, P, and K in decomposing branch appeared the quadratic curve with time.

枯枝中N、P、K含量随分解时间的变化呈二次抛物线的变化趋势，分解一年后，N、P、K含量分别为0.2756%、0.0665%、0.0586%，生物分解系数分别为1.8229、2.8812、6.8379。

The inconsistency ofchanging trend of the breakdown potential with NDE implied that NDE of aluminum was probably caused by low valence Al+ chemical reaction in solution.

不同阴离子使铝的负差数效应系数变化趋势和孔蚀活化电位变化趋势的不一致性说明铝电极的负差数效应现象是中间产物的低价离子在溶液中的化学反应造成的。

The results show that:(1)the low-noise source-follower circuit can be effectively used to measure the output of PVDF thin film;(2)the piezoelectric coefficient D33 of the PVDF is very sensitive on temperatures;(3)the value of D33 intensively fluctuate in initial loading stage,this means that a pre-load is needed in practice application to keep a constant piezoelectric coefficient D33 of the PVDF;(4)when the compressive load is imposed on the surface of the PVDF along a incline direction,D33 value is obvious changed with changing incline angle,and(5)the frequency bandwidth of the PVDF thin film is very wide,it is more suitable to measure strike or impact loading at various loading conditions.

结果表明：(1)低噪声源跟随电路可有效测量PVDF 薄膜输出；(2)PVDF压电薄膜的压电系数D33对温度很敏感；(3)D33值在加载初始阶段波动很大，所以实际应用中应给PVDF提供一个预压载荷，以确保有一恒定的压电系数D33；(4)当压载荷沿倾斜方向作用在PVDF 表面时，由于有剪切力作用，D33 值会随着倾斜角的变化发生显著改变；(5)PVDF 薄膜具有很宽的频响，更适用于测定不同载荷条件下的侵彻或冲击等动态载荷。

It will obtain the relationship between sound-absorbing coefficient and the effective parameters, and draw the relationship figures with MatLab.

用Matlab程序实现吸声系数、反射系数与各个参量变化关系的模拟，绘制关系曲线。

Due to different properties of the signal and noise in wave-let coefficient modulus under different scale of wavelet transformation, we can extract the edge characteristic through detecting the local maximum of the wavelet transformation coefficient modulus.

基于信号与噪声在不同尺度下小波系数模的变化特征，可以通过检测小波变换系数模局部极大值来提取图像的边缘特征。

Aformula which describes the transient process from beginning traveling waveto steadytraveling wave was deduced and the concept of initial traveling wave stagefirst was defined and its duration was given. It leads to a conclusion that reflectionfactor is a time dependent function, and variation range and reflection factor atdifferent stage were presented .Based on unified traveling wave theory andtransmission line model of reflective terminal with energy storage element , powerpolarity of initial traveling wave was analysed with both physical and mathematicalmethod.

通过理论推导得出从初始行波到稳态行波过渡过程的数学公式，统一了不同阶段的故障分量信号；定义了初始行波的概念，并指出了其持续时间的影响因素，针对末端含有储能元件系统，从物理和数学两方面剖析了初始行波的功率极性；通过分析提出反射系数是时变函数，给出了在不同暂态阶段行波反射系数的变化范围。

As same as the above-mentioned reason, because theconditions at the inside straight boundary of the binarycomposite material can not be easily satisfied, here, anelastic circular inclusion with large radius is used to replacethe upper half space of the binary composite material, so the〓mary binary composite mater ial problem can be changed〓the scattering problem of a circular elastic inclusion andto the scattering problem of a circular eastic inclusion and〓circular cavity in an infinite space to the steady incident〓wave.

与前面两个问题的理由一样，同样，由于问题中双质复合材料的内部直边界上的边界条件不易解析满足，为此，本文采用了一个半径很大的弹性实夹杂来代替问题中双质复合材料的上半空间部分，而将原来的双质复合材料问题转化成了无限大空间中一圆形弹性夹杂和一圆孔对稳态P波的共同散射问题，根据该问题的特点写出了弹性夹杂内外波场中波函数的一般形式解，利用该问题中夹杂和圆孔处的位移和应力的连续条件，并采用复数傅立叶级数展开技术将其化为一个仅包含问题波函数中未知系数的无穷线性代数方程组，在满足一定计算精度的前提下，通过有限项截断进行近似求解，进而讨论了双质复合材料中圆孔边界处的动应力集中系数随不同入射角、圆孔的不同位置、以及入射波的不同无量纲波数的变化和分布情况。

The internal friction angle and the cohesion of the bank soil will greatly decrease after long soil soaking during the flood period, which results in a decrease of the stability coefficient.

洪水长期浸泡后，河岸土壤的内摩擦角和内聚力有较大幅度的减小，河岸稳定系数减小；对于粘土岸滩，洪水迅速上涨期间，水压力对河岸的稳定性是有利的，而洪水骤降时，河岸崩塌的几率增大；对于非粘土岸滩，洪水缓慢上涨期间，河岸稳定性变化不大，而洪水缓慢下降后，岸滩稳定系数减小。

But we don't care about Battlegrounds.

但我们并不在乎沙场中的显露。

Ah! don't mention it, the butcher's shop is a horror.

啊！不用提了。提到肉，真是糟透了。