衰减

Position parameters were obtained from the simulation with the model of towed array.Based on the theory of radiated noise forming, the launch noise was simulated according to test condition in Laboratory,and the result showed the launch impulsion noise obeyed SαS distribution. The simulated noise attenuating in deep sea was analyzed with a sound loss translation model.Minimum variance distortionless response,spatially smoothed MVDR, and beam-space multiple signal classification algorithm were adopted to process the signal, hence the source level, the frequency structure and the location of the launch noise were achieved.

基于试验的实际情况，根据潜艇拖曳阵模型，仿真生成了各水听器阵元与本艇的位置关系；根据噪声源理论模型分析产生雷弹发射模拟噪声，利用SαS分布模拟武器发射冲击噪声，仿真分析模拟噪声在海洋环境中的传播衰减，对阵元信号分别利用最小方差无畸变响应法（MVDR 、空间平滑MVDR以及适应子带的波束域多重信号分类算法进行信号处理，得到发射噪声的声源级、频谱结构和方位。

The profiles and decay lengths of energy or particle flow can be estimated from plasma temperature and density. Edge plasma behaviors between limiter and divertor configuration are compared.

比较了在孔栏位形和偏滤器位形下边缘等离子体特性的差异，特别是两种位形下边缘温度和密度衰减长度的变化。

And alarmist politicians and doomster academics may, in pointing to the state of decay, miss a nation's continuing strengths and attractions, which have to be weighed against its problems and worries.

而杞人忧天的政客和末日论的学者们则可能在指出衰减状态的同时也遗漏了国家持续的国力和吸引力，这些都应该与面临的问题和担忧受到同等重视。

The up-regulation of 〓 receptor may be an important factor in AIM seen in long-term treatment of parkinsons disease with 〓-dopa; and the deterioration of response to DA-agonists may be associated with the down-regulation of 〓 receptor.

长期应用1—dopa等药物治疗帕金森病过程中伴发的AIM，〓受体的上调可能是一个重要因素，药效衰减与〓受体下调密切相关。

In the case of double line spectrum, modulation ratio changes as a periodic function of light-path difference with the period of λ〓/△λ.

在有一定宽度的谱线情况下，调制比随光程差的增加而衰减，因而存在一个最大光程差λ〓/△λ。

ABSTRACT Objective: To discuss the performance of Magnetic Resonance with FLAIR Pulse Sequence and the T2WI Weighting Image in the patients with acute cerebral infarction, and analyze the sensitivity of MRI with double sequence in the acute cerebral infarction.

目的：探讨急性脑梗塞在磁共振液体衰减翻转回复序列与常规SE序列T2WI加权像上的表现，并对比分析双序列在急性脑梗塞MR诊断的敏感性。

The seeds could not be stored for a long time and the number of germination was 50% or so when seeds were cold stored . We can infer through analyzing the inheritance of some character of Gerbera jamesonii that the expression of red flower color of hybrids somewhat trended to that of female parents , plant height、flower diameter and flower doubleness had a declined tendency .

通过对杂交组合F1代的部分性状遗传变异情况分析可知：非洲菊舌状花瓣的红色具有偏母性遗传的倾向；单瓣性具有一定的遗传优势，重瓣型不具有遗传优势；杂交F1代的株高和花径呈趋小性衰减的趋势。

The decline of foam stability of draft beer has become the key factor influencing beer quality.

纯生啤酒的泡沫稳定性衰减问题已成为其质量保证的难题。

The invention enables the dual module and dual standby mobile terminal to continue the present calling by switching to another network when TDCDMA network signal diminishes.

本发明使得双模终端在TDCDMA网络信号衰减的情况下，可切换到另一网络继续当前的呼叫。

The influence of the sand and dust storm for different water contents on Γ is studied.

对毫米波在沙尘暴中的衰减和双频互相关函数进行了研究。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。