衰减的

Two useful formulae for calculating the attenuation constant of conductor loss for TEm0 and TE0n modes of the rectangular waveguide are derived, and the loss characteristic in the rectangular waveguide is analyzed and computed.

根据横向谐振原理和微扰理论，本文提出了一种分析非理想波导损耗特性的新方法，推导出了一组计算矩形波导TEmO和TEOn模导体损耗的衰减常数公式，并分析计算了矩形波导的损耗特性。

Temperature is key factor for natural attenuation of nitrobenzene. The present study investigated the nitrobenzene of natural attenuation and nitrobenzene of bio-argumentation at 4℃and 20℃.

利用人工配制的2种不同浓度（1000和100μg·kg-1）的硝基苯污染底泥，研究了4℃和20℃ 2种温度条件下硝基苯的自然衰减和生物强化降解情况。

In the external mode, an analog input voltage controls the attenuation, with a scale factor of 25 dB per volt input.

在外部模式，类似的输入电压控制的衰减，其规模因素二五分贝每伏的投入。

Fourthly, a detailed process to design and optimize a variable optical attenuator was researched.

然后是详细的介绍了一种非对称的Y分支型光衰减器的设计优化过程。

Optical attenuator is an important optical passive component, wide used in optical communication, especially in All Optical Networks.

光衰减器是一种广泛应用的重要的光通信无源器件，尤其是在全光网络中有着重要的应用。

The attenuator is based on that low microwave surface resistance and excellent laser response characteristics of YBCO film.

该衰减器的实质是利用忆钡铜氧高温超导薄膜极低的微波表面电阻和卓越的激光响应特性。

This is realized by employing a variable optical attenuator at the lambda laser source of optical channel having the impairment.

这一步是在减损的光信道的λ激光光源上，采用可变光衰减器实现的。

Methods 16 patients who were diagnosed as myasthenia gravis with initial head and neck symptoms were determined by a pure tone audiometer and acoustic immitance measurement and then the acoustic reflex was reexamined 30 min after injection of Neostigminum sulfate 0.5～1?

对以头颈部和五官症状为首发症状而到我科初诊的16例重症肌无力患者进行纯音测听和声导抗检测，并在肌肉注射甲基硫酸新斯的明0.5～1.0？mg，30？min后复查声反射。检测用0.5、1.0、2.0和4.0？kHz的纯音作同侧和对侧刺激，比较用药前后有无声反射及其阈值、振幅变化、有无衰减等。

The analysis of the continuous property of raw silk size Setting the decaying rate^and the quasi-cycle value T in the model of the silk size autocorrelation coefficient, building the time series of a single cocoon reeling silk size with autoregressive model, then by combining k such time series according to different phrase, obtained time series of the raw silk size, and finally count up the silk size deviation of the time series.

k粒缀生丝纤度连续性特征解析设定生丝纤度自相关系数模型中衰减率A与拟似周期T的值，用自回归预测模型生成一粒缨生丝纤度时间序列，然后将k个这样的序列以不同位相并合得到卜粒缥生丝纤度序列，统计该序列的生丝纤度偏差。

The average propagation velocity of the laser-induced shock wave in aluminum is 6.38×10 3m/s.

激光引发的冲击波峰值压力在铝中的衰减规律是指数型的。

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％。