衰减

Solidification degree of PETN composite explosive would affect ultrasonic attenuation.

介绍泰安混合炸药固化程度对超声波衰减的影响。

Rate of harmonic current, output impendence of voltage source converter and control loop phase lag.

LCL滤波器由于可以兼顾低频段增益和高频段的衰减，是APF输出滤波器的较好选择，但LCL滤波器是3阶系统，增加了控制难度。

By the Laplace transform method, the decreasing rule of particle displacement of seismic wave has been resolved and so does the rule of phase velocity, particle velocity in time and frequency domain respectively.

通过拉氏变换求得地震波质点位移的衰减变化规律，并进一步得到了相速度、质点速度在时间域和频率域的变化关系。

The signal height and decay time of the transient photoconductivity as the function of the iridium dopant concentration are studied at 77K.

研究在 77K时，铱掺杂溴化银微晶瞬态光电导的信号强度和衰减时间与铱掺杂浓度间的关系。

In addition, for photodiodes passivated with thin SiO2, Photocurrent decreases slightly, however dark current increases remarkably.

实验中还发现，薄钝化的二极管的光电流衰减最小，其暗电流增加最显著。

In the work, the laser-behavior under exposure of Ar〓 laser was discussed. The kinetic process of photochemical reaction, intermediate, sensitive process of diazophthoquinon system were studied by laser fluorescence spectrum and laser induced fluorescence attenuation. The nonlinear relation between photodecomposition rate of the system and laser power and concentration of solution was investigated in detail.

论文也进行了感光组成物感激光性能的研究：利用激光荧光光谱及激光诱导荧光衰减法实现了实时探测邻叠氮萘醌型光敏剂感激光光化学过程、中间体的产生与结构以及增感作用的研究，该方法在国内外文献中未见有报道。

By experimental study of the situation with high-velocity photogram, not only the initial speed and the decline law of it have been determined, but also many problems have been solved, such as the influence of choke on initial speed, the influence of wad on flying shots, the attitude change of flying wad, the process of the wad separated from the shots, and so on.

通过高速摄影实验研究，不仅较为准确地测出了初速大小和速度衰减规律，而且弄清了不同锥度的喉缩对初速的影响、弹托对弹子飞行的影响、弹托飞行姿态的变化特点及弹托脱离弹子的过程等问题。

The transient fluorescence spectra of porphyrin polymers were studied. The fluorescence lifetimes of porphyrin polymers are picosecond level.

采用瞬态荧光光谱实验方法研究了卟啉聚合物荧光衰减的动态过程，发现卟啉聚合物具有具有皮秒级的荧光寿命。

The accuracy of the MFC was 3.8%FS, and the Rotor Flow Meter's was 2%FS. 2. The measurement of pressure was carried out by using semiconductor silicon piezometer. With the static pressure in inlet of pipeline and theoretic analysis we could get the total pressure of MPT.

3可在真空下稳定工作的新型微波源功率的测量较为方便，通过改变控制电压的大小可以调节输出功率，通过测量衰减检波器的输出电压信号可实现反射功率的测量。

Objective:To evaluate the characteristics a nd clinical ap plication of fluid attenuated inversion recovery sequences in MRI of the brain.

目的：通过对头颅液体衰减反转恢复序列的应用研究，了解其特点及临床价值。

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％。