| 1. | Effects of infrasound on biological characteristics of osteoblast - like cells
次声波对成骨样细胞生物学特性的影响 |
| 2. | Using the infrasound method to predict the initial time and scale of the earthquake is effective
利用次声波异常信号预测发震时间及震级是十分有效的。 |
| 3. | An infrasound detecting software was developed in visual c + + . it is a real - time infrasonic data acquisition and analysis program of 3 - point array
最后用visualc开发一套次声波探测系统软件，实现3点阵次声信号的实时数据采集和分析。 |
| 4. | The wave length of infra - sound is quite long : typical infra - sound from the eye of a typhoon has a 4 to 8 second cycle 0 . 25 to 0 . 125 hz , meaning that its wavelength is a few kilo - metres long
次声波的波长很长，例如台台风眼所产生的次声振动周期约秒0 . 250 . 125赫兹，波长便可达数公里。 |
| 5. | At present time , the infrasound method stays the stage of using recorders to record the infrasound wave continuously for 24 hours . automatically data acquisition and computerized analysis is not available
目前次声波采用记录仪连续24小时观测记录其波形，还未实现数据的自动采集，所以无法利用计算机对信号进行分析处理。 |
| 6. | Firstly , a system was developed in functions to collect infrasound data , to transform analog voltage signal from detector into discrete signal by a / d card and to process the data by using methods of digital signal process
首先设计一套数据采集系统，次声波信号通过传感器被转换成模拟电压信号，通过a d板将其转换为离散的数字序列，输入计算机。利用数字信号处理的原理和方法对异常次声信号进行分析处理。 |
| 7. | One of the interesting properties of infra - sound is that it can travel a long distance in the air without much decay . this enables continuous monitoring of the atmosphere on a large scale . when combined with other remote sensing data , it can provide additional information regarding the atmospheric structure
次声波的特点是衰减小，可作长距离传播，因此能够对大气进行大范围连续不断的监察，当结合其他的遥感资料一起使用，更可提供额外的关于大气结构的数据。 |
| 8. | The program includes the infrasonic signal data acquisition of three channels , 3 - d dynamic spectrum analysis , correlation analysis of 3 channel infrasonic signals , the calculation of wave direction , the wave speed , the spectrum analysis at any length and a real - time infrasonic gravity wave pressure - time ( p - t ) curve
本程序支持3路次声波传感器信号的数据采集、动态谱分析及次声信号的相关分析、能计算波源的方位角、波速以及任意时间段的谱分析，并实时给出次声重力波的压力?时间曲线(即p ? t曲线) 。 |
| 9. | Hi this thesis , the technique of detector array is used to obtain the location of anomalous infrasound , it is the basic of the study of prediction of earthquake . to derive useful information by using spectrum analysis on infrasonic signal . then combing with other methods a forecast could be made
本课题主要是利用数字技术，采用用传感器阵列计算异常次声波波源的方位，这是今后预测震中位置研究的前提；并对次声信号进行频谱分析，提取有用的关于临震次声方面的信息，再结合其他的预报方法，作出准确的地震预报。 |
