衰减曲线

The excitation, photoluminescence and afterglow spectra as well as the curve of afterglow decay were investigated.

测量了其激发、发射光谱及余辉衰减曲线。

Calculate the exponential decay curve of the Preventive replacement costs until they intersect the corrective replacement costs on a time basis.

计算预防更换成本的指数衰减曲线直到他们在时间基础上横断矫正更换成本。

First, with the help of I-H model and Y-T model, the luminescence decay curve of 〓 of Tm〓 was fitted, and the fitted values of corresponding energy transfer interaction parameter C〓 and energy migration interaction parameter C〓 were calculated.

首先，藉助I-H、Y-T模型拟合了Tm〓的〓的发光衰减曲线，得到了相应的能量迁移和能量传递的作用参数C〓和C〓的拟合值。

Otherwise, wide pulse and slow falling edge can cause the errors of surface recombination velocities and bulk lifetime extracted from the photoconductive decay curve.

否则脉冲光过长的脉宽和下降沿将对光电导衰减曲线中进一步分离出的表面复合速度和少子体寿命结果造成误差。

Based on the comparison of the delayed neutron counter rate of known fission rate with the delayed neutron counter rate of a burst,a method to determine burst total fission number of burst reactor was built.

用长计数器测量已知裂变率的缓发中子计数率，然后用同一探测系统测量脉冲后的缓发中子计数率，探测系统的探测效率、缓发中子份额和缓发中子先驱核半衰期等参数均不变，从而建立起利用脉冲堆脉冲后的缓发中子衰减曲线确定脉冲裂变总数的方法。

Main contents and conclusions are: 1 The ionization current was measured continuously by a charge-integration method with a computer after the introduction of radon into the chamber.

主要内容及结论：1充氡后利用计算机连续进行电离电流累积测量，得到了精细的电流随时间的变化曲线，可清楚看出氡及其子体的生成衰变造成的电离电流的生长—稳定—衰减过程，与理论计算值进行了比较，由电离电流衰减速度的变化得出氡吸附作用的影响，并测量到电离室冲洗后氡的反扩散现象；2由已知活度的标准源定出相对测量的刻度系数K值，K=24.62 Bq／pA，对同一个监测源以半年为周期进行多次测量后得出稳定性符合要求；3通过测量电离电流和气压的关系曲线以及不同气压下的饱和曲线，确定了常规的工作条件；4测量了盐酸清洗电离室内表面降低本底的效果；5不确定度分析表明相对测氡的扩展不确定度(k=2)小于5％，由本底涨落得出探测下限为0.5 Bq；6理论上对壁损失修正进行了计算，实验上保持电离室工作在饱和区的情况下，测量了不同气压下电离电流的变化，从中得出了壁损失随气压变化的规律，可以看出，电离电流的实测值和计算值随气压变化规律基本一致；当气压大于125 kPa时，端效应等其它因素造成的影响不大于2％，因而在此工作条件下，测量电离电流后通过计算修正壁损失可以实现近似的绝对测氡，提出了进一步提高绝对测量准确度的方法。

For , these poles are on the negative real axis, on both sides of , the transient is a sum of two decaying exponentials, each with its own time constant.

当 时，这些极点在负实轴上，在的两边，瞬态响应为两个不同时间常数指数衰减曲线之合。

At last, natural frequencies of practical pre-stressed composite space truss are tested with pulsatory method on construction site and its damping ratio is calculated, which gives another important data for engineering design. In addition, through the model experiment of pre-stressed rectangular square pyramid composite space truss, the correctness of characteristics of internal force and the feasibility of tension recovery method are proved.

最后，在工程施工现场用脉动法测试自振频率，并借助于振动衰减曲线和半功率点法计算出预应力组合网架——钢与混凝土的混合结构体系——的阻尼比，此又为工程设计提供了一理论依据；另外，通过正放四角锥预应力组合网架的模型试验，验证了结构内力分布特点的正确性以及张力松弛法的可行性。

Compared with the method of Lg[N00-N], the method of Lgderivative is more accurate. A simple and flexible signal source of multiple decay was designed with the linear adding of many RC charging signals. Two suits of multiple decay data which are acquired independently over a 10th order time span indicate that, the shape of the Lg derivative peak is coherent with its theoretical peak unitarily.

独立进行的两组不同的10 个时间数量级的数据都表明，复杂衰减过程的实验数据的K-Lg微分峰形曲线，与以各元件RC 值计算出的衰减寿命值和测量各单一充电过程的衰减量实验数据为参数，再由理论公式产生的曲线比较，两者在曲线整体形状上有很好的一致性。

By the contrast of the decay characteristics between the unsensitized sample and the sensitized samples, the optimum sensitizing-time on this experiment condition is 60 min.

通过未增感样品与增感样品的衰减曲线对比，得到了在此实验条件下的最佳增感时间为60min。

Lugalbanda was a god and shepherd king of Uruk where he was worshipped for over a thousand years.

Lugalbanda 是神和被崇拜了一千年多 Uruk古埃及喜克索王朝国王。

I am coming just now,' and went on perfuming himself with Hunut, then he came and sat.

我来只是现在，'歼灭战perfuming自己与胡努特，那麼，他来到和SAT 。