On the detection of the bursting events with the VITA technique.
On the detection of the bursting events with the VITA technique.
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关于使用 VITA 技术检测突发事件。
DOI：
10.1299/kikaib.52.3224
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发表时间：
1987
期刊：
影响因子：
--
通讯作者：
Shigeo Nishi
中科院分区：
文献类型：
--
作者：
H. Osaka;S. Mochizuki;Shigeo Nishi
对目前广泛应用于爆破现象检测的VITA技术的检测判据进行了实测研究。用三种VITA技术得到了u-、v-和uv-模式的平均破裂频率和条件平均值，它们与检测时速度的增加或减少有关，但与速度斜率准则无关。发现最可能的阈值K约为0.8 ~ 1.2，无量纲化平均时间T*在20 ~ 24之间存在一个合适的范围。对于N=90以上的大量事件，平均爆发频率几乎是恒定的。与其他研究人员的结果相比，本研究用VITA技术得到的K、T*和N的最可能值是合理的。
Measurements have been made to study the detection criterion the VITA technique which was widely utilized for detecting the bursting phenomena. The mean bursting frequency and the conditional averages of u-, v- and uv- patterns were obtained from three kinds of VITA techniques, associated with an increase or a decrease in velocity at the detection time, but not with the velocity slope criterion. It was found that the most probable threshold value K was about 0.8 to 1.2, and that an appropriate range of the non-dimensionalized averaging time T* existed between 20 and 24. For a large number of events beyond N=90, the mean bursting frequency was almost constant. Compared with the results of other researchers, the present one obtained from the VITA technique with the most probable values for K, T*, and N was found to be reasonable.