地震计

There are many noise sources in measuring the seismometer transfer function, the main noise sources are investigated. The method of cross-special analysis is presented, flow process diagram of computing is given, the algorithms are discussed in detail, such as low-pass digital filter, computing of seismometer transfer function initial values, time domain convolution, bilinear transformation, estimation of power spectrum and cross-spectrum, window functions and preprocessing of measuring data etc.

在地震计传递函数测试过程中的存在多中噪声，本文分析了主要的噪声来源；介绍了用互谱分析方法测试地震计频率特性的基本原理和方法；给出采用该方法确定地震计传递函数的算法流程图；并对计算过程中采用的低通滤波器、地震计传递函数的初值确定方法、卷积运算方法、自谱和互谱估计、采用的窗函数和测试数据的预处理进行了详细讨论。

The accurate measurement of seismometer transfer function is important to interpret and use of seis...

数字地震观测系统中地震计传递函数的测定对于观测数据在地震学中的解释和应用是非常重要的。

The accurate measurement of seismometer transfer function is important to interpret and use of seismographic observation data.

数字地震观测系统中地震计传递函数的测定对于观测数据在地震学中的解释和应用是非常重要的。

The method of the damping and frequency of seismometer is obtained in time domain is introduced, with the method, some application examples of FBS-3A seismometer are given.

本文也介绍了在时域确定地震计的阻尼常数和自振周期的原理和方法，给出了具体在FBS-3A地震计上的应用实例。

A similar development in the USA is termed triaxial seismometer.

美国研制的与此相似的地震计称为三位地震计。

The measurement of seismometer transfer function is implemented mainly in the low-frequency part, and transfer function in the high-frequency part is obtained with analysis and calculation.

本文对宽频带地震计的频率特性测试是在地震计的低频段进行，对于地震计高频段的频率特性采用理论分析计算获得。

With the time passing by and the environment changing, the characteristics of the components in a seismometer may change a little to some extent. To realize this kind of change and take steps to control or adjust it is helpful to improve the reliability of the sensor′s output.

随着时间的推移和环境条件的缓慢变化，地震计各部件的性能参数会有所改变，及时了解这种变化并加以控制和调整，有助于提高地震计输出结果的可信度。

A seismometer is a seismograph whose physical constants are so well known.

地震计是一种地震仪器，其物理常数是已知的。

A number of recent seismological instruments (e.g., STS-2 and Trillium seismometers) use Galperin sensor configuration.

现在很多地震学仪器（比如， STS-2地震计和 Trillium 地震计）都用 Galperin 传感器装置。

By taking into account the various degrees of freedom of the seismic sensors, it has been shown that the seismometers are not only translational sensors but also rotational ones with a sensitivity that depends on the installation.

由于地震传感器有不同的自由度，所以地震计不只是平动传感器，也是一个灵敏度与装置有关的旋转传感器。

Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.

在对危险的南部地区访问时，他斥责什叶派民兵领导人对中央集权的挑衅行为。

In fact,I've got him on the satellite mobile right now.

实际上 我们已接通卫星可视电话了