查询词典 attenuation

The heavier the ablation is, the faster attenuation the ablating acoustic spectrum has.

烧蚀程度越大，与烧蚀相关的烧蚀声峰衰减越强烈，烧蚀声峰的上升时间约为400 μs。

All the compressed centrums depicted even lower attenuation with papery cortical bone and notable sparse trabeculae;Where as,the fracture line was not found in all compressed centrums.

对X线诊断、临床证实的30例绝经后脊柱原发性骨质疏松患者椎体压缩的CT表现进行回顾性分析。

All the compressed centrums depicted even lower attenuation with papery cortical bone and notable sparse trabeculae;Where as,the fracture line was not found in all compressed centrums.

结果：81个椎体表现为压缩变形，其中凹陷形48个，楔形27个，扁平形5个，椎体内骨折线不明显，骨密度均匀减低，骨皮质变薄，骨小梁稀疏。

can be drawn by analyzing the experiment data:(1) With modeling indoor garbage column leaching test, the results indicated that the dynamic change of the pollution components of leachate display complex fluctuate attenuation; During the course of initial stages and middle stages, the garbage was decompounded quickly and gave out the quality concentration of pollutant maximally to the environments and the harm was also the most serious.

通过对试验数据进行整理分析，得出了如下结论：(1)通过室内垃圾柱淋滤模拟试验，结果表明淋滤液中污染组分的动态变化呈复杂的波动衰减；垃圾在填埋过程中，初期和中期降解速度很快，向环境中释放的污染物质量浓度最大，对环境造成的危害也最为严重。

Calculations of diffracted attenuation are important for acoustic design of railway noise barriers.

铁路声屏障绕射衰减计算是声屏障声学设计的重要内容。

The combination of the effects of signal attenuation and impedance discontinuities on a communications link is called insertion loss.

结合在通讯链结上的讯号衰减和阻抗不连续的效应被称为插入损失。

In this dissertation, the theories and practical achievements of this field were summarized, ruls about dissemination and attenuation in soils of vibration are discoursed.

本文对该领域近年来的研究成果进行了综述，论述了振动在土中的传播及衰减规律。

The causative agent of the disease is an Corona virus, infectious bronchitis virus IBV）, classified as Corona .Present vaccines for IB are all modified live viruses derived either by sequential passage embrocated chicken eggs. As Immunogenicity of IBV is usually correlated with its virulence, almost all modified live IB vaccines remained insufficient attenuation and have shown a variety of side effects including spread of vaccine virus to no vaccinates, occurrence of long term "carrier" birds, and increasing virulence during in vivo passage.

目前国内外预防本病所用的疫苗大多数是弱毒疫苗，但现用弱毒疫苗都存在以下缺点：（1）与IBV强毒一样，其弱毒疫苗株也能引起潜伏感染，潜伏感染的鸡将终生带毒；（2）疫苗病毒可以由接种鸡传染给非接种鸡，在鸡群之间传播过程中毒力会返强，从而成为新的感染源；（3）传染性支气管炎病毒极易发生变异，且易成为病毒重组的供体和受体，给使用IB传统疫苗预防和根除IB带来极大的困难。

Seismic exploration ; data acquisition ; high resolution ; frequency spectrum ; wave filter ; absorption ; attenuation ; equilibrating filter

地震勘探；数据采集；高分辨率；频谱；滤波器；吸收；衰减；均衡滤波器

Besides various interferences, the wave front diffusion, the ground absorption and the attenuation are all the causes of a weak seismic reflection and, plus the complicated superficial geologic setting and the reservoir bed features of low amplitude, low porosity and low permeability of the compacted thin detrital rock in HJQ, the conventional seismic amplitude fidelities do not meet the criteria of the seismic inversion.

除各种干扰外，地震波传播过程中的波前扩散、大地吸收、衰减等使地震反射能量变弱，加之杭锦旗地区复杂的表层地质条件和低幅、低孔、低渗致密性薄层碎屑岩的储层特点，使常规保幅地震资料离地震反演的要求还有差距，并且反演技术本身不具备噪音识别功能，包含噪音的反演必然会影响地质效果。

So it was last week in Selma , alabama.

上星期在亚拉巴马州塞尔马市发生的事件也是这样一个转折点。

The group also spearheads various social programs in China.

该组织还带头参与中国的各种社会活动。