衰减

In the three dimensional seismic survey research process to HuoJitu well field in DaLiuta coal mine, it used weakness before superimposes、three dimensional after superimposes weakness followed with noises and other technics to dispose with the primary earthquake section planes, which enhancing three dimensional earthquake data body signal-to-noise ratio.

在对大柳塔煤矿活鸡兔井田进行三维地震勘探研究过程中，对原始地震剖面采用叠前面波衰减、三维叠后随机噪音衰减等新技术加以处理，提高地震三维数据体的信噪比。

The exponential regularity of the shock wave attenuation coefficient versus the charge diameter in PMMA was obtained by fitting experimental data.

利用锰铜压阻传感器法测量了某聚奥传爆药在不同直径下的小尺寸装药爆轰输出冲击波经不同厚度有机玻璃隔板衰减后的冲击波压力，通过对实验数据进行拟合，得到了有机玻璃介质中冲击波衰减系数与装药直径的指数型关系。

When the digitalsignal carries on the long distance transmission, the high frequencycomponent weaken increases along with the distance increases, theelectric cable median line also advances to the betweenelectromagnetic radiation along with the frequency intensifies, thusthe clipped wave transmitting range and the transmission quality,simultaneously in the channel often also exists separates the directcurrent electric capacity and the coupling transformer, they cannottransmit the direct component and have a bigger weaken to the lowfrequency component, therefore high frequency and low frequency arepartial regarding the common channel is limited.

当数字信号进行长距离传输时，高频分量的衰减随距离的增大而增大，电缆中线对之间的电磁辐射也随着频率的增高而加剧，从而限制信号的传输距离和传输质量，同时信道中往往还存在隔直流电容和耦合变压器，他们不能传输直流分量及对低频分量有较大的衰减，因此对于一般信道高频和低频部分均是受限的。

Though the decay of weighted wavelet coefficient is the same as the common wavelet, the computable complication is observably reduced.

表明了加权小波系数的衰减性与一般正交小波的系数衰减性相同，但计算复杂度更低。

Compared with the common wavelet by the Fourier transform, the decay of weighted wavelet coefficient is faster than that of the common wavelet. Furthermore, the method is simple and easily applied. Its computational complexity is greatly reduced.

与采用常见的Fourier变换得到的正交小波相比，加权小波系数的衰减性比正交小波的系数衰减性快，而且计算过程简单，复杂度低，易于应用。

This paper presents a new chlorine decay model adaptable to the real multi-source network, using Epanet-msx simulation module, comparing the differences in the concentration of chlorine caused by using the same or different chlorine decay rate coefficient of the treated water from different water plants, and then taking the discrepancy of the chlorine decay rate coefficient into consideration will be able to reflect residual chlorine concentration and changes in the network more realistically.

通过建立符合实际工况的多水源余氯衰减模型，运用Epanet-msx水质模块进行模拟运算，对比不同水厂余氯衰减系数同一化处理和差异化处理对管网余氯浓度造成的差别，可以看出差异化处理将能更真实地反应管网中余氯浓度的分布和变化情况。

Finally, the temperature field variations of two kinds of frame structures with the height and the time are calculated, in which the time step, the frill calculation time, the fire growth coefficient t and the fire decay coefficient t are selected respectively as 1s, 50min, l50s and 600s, and the fire experiences all the fire period including the growth, the flashover, the full development and the decay stages.

随后，取时间步长为1s，计算时间为50min，分别计算了两种围护结构内部温度场随时间和位置的变化规律。计算时，火灾增长时间t为150s，衰减时间t为600s，所选取的火灾为经历了生长阶段、轰然阶段、充分发展阶段和衰减阶段的全过程燃烧。

Further picosecond PL studies on dendronized PFs show that the fluorene-based emission in dilute solution follows a single exponential decay, whereas those in thin film decayed in a multi-phase manner and the lifetime prolongs with the generation of dendronization. These observations are discussed in terms of dispersive transport happening between adjacent chains in film. The dispersive relaxation can be controlled by site isolation of bulky dendrons. Our results prove that dendronization is highly effective in controlling the inter-chain interactions of fluorene-based polymers.

不同代数树枝化聚芴的时间分辨荧光动力学研究结果表明，溶液状态下的发光为单指数衰减行为，而薄膜状态下的发光为多指数衰减行为，且其发光寿命随树枝化代数增加而增长，表明树枝化基团抑制了邻近的聚芴分子之间能量传递所致的激发态能量耗散。

Fluorination modification and electret properties were studied on the cellular polypropylene films modified by gaseous fluorine, by attenuated total reflection infrared analysis and the measurings of open-circuit thermally stimulated discharge current and in situ TSD charge and isothermal charge decay.

通过衰减全反射(Attenuated Total Reflection， ATR)红外光谱分析与开路热刺激放电（Thermally Stimulated Discharge， TSD）电流、原位实时电荷TSD和电荷等温衰减的测量，本文研究了氟气对孔洞聚丙烯膜的氟化改性及氟化改性对其驻极性能的影响。

As soon as you start changing the power section of an amp to acomodate lower wattages you have changed the tone especially when that requires new transformers and every consequence that comes with it.

我不是很明白，是说一旦当需要用到新的变压器来改变电源以适合更小的瓦数，会彻底改变AMP的音色？难道说的是功率衰减？那岂不是功率衰减也不靠谱？ N多专业词汇，看了头晕。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。