衰减的

Objective To investigate the value and clinical application of lowfield intensity MRI with fluidattenuated inversionrecovery sequency in fossa cranialis posterior disease.

目的：探讨低场MRI液体衰减反转恢复（fluid attenuated inversion recovery，FLAIR）序列在后颅窝病变的应用价值。

In almost every case output shrank for the first two or three years of the process.

在这个过程的头两三年，几乎所有国家都经历了产出衰减。

What really is important are propagation delay, delay skew and attenuation.

实际上重要的是传输延迟、延迟偏移和衰减。

This article is a review of different methods for attenuation correction in SPECT.

综述了常见的SPECT衰减校正方法，包括前、后校正法，本征法和迭代法。

Furthermore, the parameters of the pulse stacker, such as attenuation and time delay, etc, were worked out.

在此基础上，计算获得了脉冲堆积器的衰减系数、延时等控制参数。

Fig. 3 The condition of signal attenuation of sulfa

图3 连续进样后磺胺类药物的信号衰减情况

The modulated signals are added up in a summator 120 to form a real signal, which is filtered by a RF filter 122 for attenuating out-of-band noise and spurious interference.

在加法器120中将调制的信号相加形成实信号，该信号通过RF滤波器122滤波，以衰减带外噪声和伪干扰。

This software is programmed using VB for the analysis of industrial superheated steam in the pipeline transmission of useful energy attenuation.

本软件采用VB编程，用于分析工业上过热蒸汽在管道传输过程中的有用能衰减。

Measure character: Frequency limits: CH1:dResolution of C ～ 225MHz frequency: 10 / second time-interval resolution : N/A measures speed: Can amount to 200 times measure / the second mixes in limits of the voltage on GPIB sensitivity : DC ～ 100MHz: 200MHz of ～ of 5Vac+dc 100MHz of 20mVrms ～±: 225MHz of ～ of 5Vac+dc 200MHz of 30mVrms ～±: Input of 5Vac+dc of 40mVrms ～± adjusts:(CH1 chooses) impedance, coupling: 1M Ω or 50 Ω, ac or Dc are low connect filter: 100kHz, but switch attenuation:× 1 or reference of × 10 exterior time base inputs: 1, 5, 10MHz sparks: CH1, to rising / drop the edge sparks, the percentage that uses signal n or absolutely voltage install n, setting sensitivity mixes to low, medium or tall gate start: Automatic, the hand is moved (setting gate time or resolution digit); Exterior, defer interface: Standard GP-IB(IEEE 488.1 and 488.2), take; of SCPI compatible language to say RS-232 power source only: 10 ％ of 100-120VAC ±, 50, 60 or 10 ％ of 400Hz ± 10 ％ of 220-240VAC ±, 50 or 10 ％ of 60Hz ± are suttle: 3kg dimension: 348.3mm of × of 212.6 × 88.5H

测量特征：频率规模：CH1：dc～225MHz 频率分辨率：10位/秒时候距离分辨率：N/A 测量速度：可达200次测量/秒在GPIB上电压规模和灵敏度： DC～100MHz： 20mVrms～±5Vac+dc 100MHz～200MHz：30mVrms～±5Vac+dc 200MHz～225MHz：40mVrms～±5Vac+dc 输入调节：(CH1选择)阻抗，耦合： 1MΩ或50Ω，ac或dc 低通滤波器： 100kHz，可切换衰减：×1或×10 外部时基参考输入： 1，5，10MHz 触发： CH1，对回升/回升沿触发，用信号电平的百分数或相对电压设置电平，设置灵敏度至低、中或高闸门和启动：主动，手动(设置闸门时候或分辨率位数)；外部，延迟接口：尺度GP-IB(IEEE 488.1和488.2)，带SCPI兼容说话；只讲RS-232 电源：100-120VAC±10％，50，60或400Hz±10％ 220-240VAC±10％，50或60Hz±10％净重：3kg 尺寸：212.6×88.5×348.3mm

Methods: The heart model and 69 testee were examined by taking both supine and prone positions and the data were dealed with statistics.

①观察断层床对放射源的衰减情况；②分别采用仰卧位和俯卧位显像对心肌模型及69例受检者进行观察，并进行统计学处理及诊断效能评价。

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％。