期刊文献+
共找到2篇文章
< 1 >
每页显示 20 50 100
Automatically positioning microseismic sources in mining by the stereo tomographic method using full wavefields 被引量:3
1
作者 缪华祥 姜福兴 +3 位作者 宋雪娟 宋建勇 杨淑华 焦俊如 《Applied Geophysics》 SCIE CSCD 2012年第2期168-176,234,235,共11页
For microseisimic monitoring it is difficult to determine wave modes and their propagation velocity. In this paper, we propose a new method for automatically inverting in real time the source characteristics of micros... For microseisimic monitoring it is difficult to determine wave modes and their propagation velocity. In this paper, we propose a new method for automatically inverting in real time the source characteristics of microseismic events in mine engineering without wave mode identification and velocities. Based on the wave equation in a spherical coordinate system, we derive a tomographic imaging equation and formulate a scanning parameter selection criterion by which the microseisimic event maximum energy and corresponding parameters can be determined. By determining the maximum energy positions inside a given risk district, we can indentify microseismic events inside or outside the risk districts. The synthetic and field examples demonstrate that the proposed tomographic imaging method can automatically position microseismic events by only knowing the risk district dimensions and range of velocities without identifying the wavefield modes and accurate velocities. Therefore, the new method utilizes the full wavefields to automatically monitor microseismic events. 展开更多
关键词 microseismic full wavefields wavefield mode identification tomographic image source parameters automatic positioning
下载PDF
Some Interesting Features for External Region of Spherical Symmetric Mass in New Theory of Gravitation VGM
2
作者 QIAN Shang-Wu 《Communications in Theoretical Physics》 SCIE CAS CSCD 2006年第5X期879-880,共2页
This paper briefly discusses some interesting features for the external region of the spherical symmetric mass in the new theory of gravitation VGM, i.e. the theory of gravitation by considering the vector graviton fi... This paper briefly discusses some interesting features for the external region of the spherical symmetric mass in the new theory of gravitation VGM, i.e. the theory of gravitation by considering the vector graviton field and the metric field, such as pseudo-singularity, curvature tensor, static limit, event horizon, and the radial motion of a particle. All these features are different from the corresponding features obtained from general relativity. 展开更多
关键词 pseudo-singularity curvature tensor static limit event horizon radial motion of the particle
下载PDF
上一页 1 下一页 到第
使用帮助 返回顶部