查询词典 attenuation

The Site Attenuation of an ideal OATS is the standard [FCC OST-55, 1977][ANCI C63.4, 1991] to be followed by any practical OATS or test chamber. An ideal OATS is the half space above a perfect conducting ground plane that extended to infinity.

用来测试电子资讯类产品之电磁辐射强度，以作为判定是否符合法规限定之安全辐射强度上限，因此理想开放测试场地就是实际测试场地必需在容许误差内达成的标准。

In this transmission system, Only EDFA was used to compensated the fiber attenuation and without FEC.

详细分析了CFBG反射谱、时延和带宽的非理想特性对40Gb/s不同码型传输系统产生的影响。

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。

Variations of attenuation coefficients with rain rate for MP and LP model are compared under Mie theory and Rayleigh approximation. The approach to the solution of the Fourier integral in closed form is adopted for pulse propagation through rain medium .

在此基础上应用傅立叶时域积分近似解的方法研究了毫米波段脉冲波通过雨介质时，脉冲畸变随频率、降雨率、传播距离及脉冲宽度变化的关系。

It solves the problem that how to calculate diffusion coefficient D when the fluorescence have significant linear attenuation which is often observed in FRAP experi- ments.

本文提出了一种切实可行的计算膜脂流动性的方法，给出了详细的实施步骤、计算方法及结果，并解决了在荧光存在明显线性衰减这一常见情况下的扩散系数D 的计算问题。

The calculation results showed that microwave attenuation can be reduced by additives of capturing free electron and reducing quantity of aluminium.

另外，羽烟中的自由电子和气体密度的涨落也能引起微波信号相位与幅度的快速涨落，这就是通常

Moreover, using two-dimension model, the vibration attenuation law of free field in thick-layered soft soil is analyzed, and the soil scopes requiring consider by various limit criterions is obtained for building.

利用二维模型分析了厚层软土情况地铁环境振动的自由场衰减规律，得出建筑在不同振动限值标准情况下需要考虑振动影响的范围。

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。

Simulative experiments were done and it was found in a certain range of mass thickness, the attenuation rule of X-ray was like that of the single energy gamma ray.

将它用作物质的透射模拟实验，发现在一定厚度范围内，它与某单能光子的强度减弱规律相同而等效。

As a result, there is less attenuation of the gamma rays from the fission products.

这样一来，从裂变产物中发射出来的γ射线的减弱就要少一些。

So it was last week in Selma , alabama.

上星期在亚拉巴马州塞尔马市发生的事件也是这样一个转折点。

The group also spearheads various social programs in China.

该组织还带头参与中国的各种社会活动。