Regarding china , if the concerned departments could provide a little practical support to sun wei , offer a little care and gentilesse , enable mass production of the monitoring instruments developed by sun wei , establish a network of monitoring stations in earthquake frequent occurring cities and regions , train specialized monitoring staff , then the earthquake accurate prediction success rate surely will be significantly improved 就我国而言，如果有关部门能给孙威一点儿实际支持，给一点关爱与温柔，使其研发的监测仪大量生产，在地震多发的城市和地区建立监测台网，培训监测专业人员，地震预报准确率必将有更大的提高。
In a short time , as we know , it is very difficult to acquire great advances in research field of predicting earthquake , however , major earthquake frequently occurs in the world and cause a great deal of economic losses and people ' s death . therefore , it is easy to understand that government and society especially pay attention to seismic early warning system which is considered as affective measure of mitigating disaster caused by earthquake 在地震预报这个世界性的科学难题在短期内很难得到突破性的进展而地震又在不断的造成巨大的经济损失和人员伤亡的背景下，基于实时强震观测台网、具有智能应急控制功能的各种重大工程与城市的地震预警系统日益引起政府和人们的广泛关注。
Through the studies on three kinds of examples of chinese successful predictions since the haicheng earthquake , and based on analysis of the complication of precursory phenomena , this paper puts forward that prediction ideas of “ the dominant factors and the subsidiary factors ” for medium term - short impending earthquake predictions can be adopted at present , that is the prediction ways of relying mainly on seismicity while making abnormal precursory phenomena subsidiary 通过海城地震以来我国地震预报成功的三种类型实例的研究和基于前兆现象复杂性的分析，提出了现阶段中期短临预报可采用“一主二辅”的预报思路，即以地震活动为主，前兆异常现象为辅的预报途径。
In engineering project , no matter the vibratory and malfunction inspection of large water wheel generate electricity set and precise machine tool , or engineering project structure vibratory analysis and mode test , earthquake forecast and geologic reconnoitering , all need to use the ulf absolute vibratory transducer to scale and analyze the signal caused when running 在工程上,无论是大型水轮发电机组、精密机床的振动监测和故障诊断,还是工程结构振动分析和模态试验、地震预报与地质勘探,均需要能够检测超低频绝对振动信号的传感器来测量分析它们运行过程中产生的超低频振动信号。
By using the projective covering method and projective covering probability , fractal and multifractal dimensions of different types of landform sueface above are computed . results show that all the studied landform surface are not simple fractals , but multi - range scaling fractals , and the fractal dimensions increase with the landform type from basin to mid - low mountain and high mountain . nevertheless , different type landscapes perform different dq - q curve shapes . which the dq value has the widest range in the high mountain type , the second one is the mid - low mountain type , and then the basin type 对不同时段地震形变场图象多重分形特征的研究表明，震源区及近震源区强震前垂直形变图象都出现信息维降低，多重分形谱曲线dq变陡，值域范围变宽的特征，说明在强震前地壳垂直形变出现了局部化、不均匀性增强的行为，这些对地震预报都有重要的实际意义。
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。
At the present time earthquake forecast focus on various phenomena of earthquake such as seismic - electricity , geo - stress , electromagnetic wave , etc . earthquake forecast based on anomalous infrasound is one of important methods because of the good corresponding relationship between the anomalous infrasound and earthquake 短临地震预报是世界性难题，由于对地震机理知之甚少，所以目前的地震预报着重于研究与地震有关的各种现象，诸如地应力、地电脉冲、电磁波、测震等等。由于次声波异常与大地震有很好的对应关系，所以它是重要的临震预报方法之一。
Abstract : through the studies on three kinds of examples of chinese successful predictions since the haicheng earthquake , and based on analysis of the complication of precursory phenomena , this paper puts forward that prediction ideas of “ the dominant factors and the subsidiary factors ” for medium term - short impending earthquake predictions can be adopted at present , that is the prediction ways of relying mainly on seismicity while making abnormal precursory phenomena subsidiary 文摘:通过海城地震以来我国地震预报成功的三种类型实例的研究和基于前兆现象复杂性的分析，提出了现阶段中期短临预报可采用“一主二辅”的预报思路，即以地震活动为主，前兆异常现象为辅的预报途径。
