衰减的

objective: to evaluate the value of fluid-attenuated inversion-recovery sequences in cerebral tumor with low field strength mri.

目的 评价液体衰减反转恢复序列在低场mr中对脑肿瘤的应用价值。

A compact and excellent band pass filter with 1.8 GHz center frequency and 250 MHz band pass was designed,which had one attenuation-pole on the high and low stop band respectively.The dimension of the filter was 2.0 mm×1.2 mm×0.9 mm,fitting for ...

实现了一个中心频率在1.8 GHz，带宽为250 MHz，且在高低禁带端各有一个衰减极点的优良小型化带通滤波器，其外形尺寸为2.0 mm×1.2 mm×0.9 mm，满足0805型号封装要求。

Besides,this subject introduce the part of LNA .the filter with low frequenc.the part of fixt decline and so on.

本课题还介绍了在射频前端中级联电路之前的LNA单元和固定衰减切换单元以及低通滤波器！

Most researchers focused on similar studies and got measured data through free decay oscillation tests before.

在以往少数垂荡板的试验研究中，人们主要采用自由衰减试验来获得所需数据，然后再进行分析。

This research was conducted to use Gamma ray attenuation method to measure sediment concentration and to use water level change rate to determine flow rate.

本研究利用γ射线衰减原理测量含沙量、采用水位随时间的变化测定流量。

Meanwhile, the newly real particles decay, giving off light, X-rays and gamma rays.

同时新生的真实粒子衰减，发出光、X射线和伽马射线。

Theoretical analysis and experimental results show that the fundamental suppression ratio is more than 94dB and the harmonic attenuation ratio is no more than 5%.

理论分析和实验表明，电路的基波抑制度可达94dB以上，谐波衰减率不大于5%。

You have have the same amount of headroom.

这里为什么不用推子而要用单独的衰减器？

The results show that, the RF decreases with the increase of gas holdup.

理论研究结果表明，随着持气率的增加，共振频率减小；当持气率较小时，共振频率衰减较快。

We also find that the temperature dependence of those interlayercouplingsare considerably enhanced with the decrease of the Hubbard interaction.

我们还发现当Hubbard互作用减弱时，双线性和双二次耦合强度随温度升高的衰减会显著增强。

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％。