Application of Fisher method to discriminating earthquakes and explosions using criterion m b/M S

Abstract

We try to give a quantitative and global discrimination function by studying mb/Ms data using Fisher method that is a kind of pattern recognition methods. The reliability of the function is also analyzed. The results show that this criterion works well and has a global feature, which can be used as first-level filtering criterions in event identification. The quantitative and linear discrimination function makes it possible to identify events automatically and achieve the goal to react the events quickly and effectively. Abstract Collection of Nuclear Inspection Technique (1). Beijing: Seismic Data and Information Center, State Seismological Bureau, 40.ACTA SEISMOLOGICA SINICA Vol. 18Criterion mdMs provides a comparison between two different parameters from one record of one event, which roughly ignores the effect of propagation medium features, but mainly display the character of hypocenter. Criterion mdMs is simple and practical, which can be used for preliminary event identification. In the paper, we have studied the discrimination efficiency of this criterion for the purpose to provide a reference for selecting the first-level filtering criterion for event identification.

A study on solution properties of poly(N,N‐diethylacrylamide‐co‐acrylic acid)

“…PDEA was synthesized according to the procedure described in Ref. 24. A solution of 1.27 g (0.01 mol) DEA dissolved in 1.5 mL methanol was stirred with 8 mg (0.0488 mmol) AIBN under nitrogen atmosphere at 60°C.…”

“…PDEA was synthesized according to the procedure described in Ref. 24. A solution of 1.27 g (0.01 mol) DEA dissolved in 1.5 mL methanol was stirred with 8 mg (0.0488 mmol) AIBN under nitrogen atmosphere at 60 C. Stirring was discontinued after 30 min, heating was continued for 6 h. The polymer was cooled to room temperature and then dissolved in 5 mL acetone and precipitated from 80 mL hexane.…”

Characteristics of dust acoustic waves in dissipative dusty plasma in the presence of trapped electrons

“…The characteristics of nonlinear electrostatic waves, especially in dusty plasma in different conditions, have been of great interest and also well explored by the research community worldwide during the last few decades [1][2][3][4][5][6][7][8][9][10]. It is well known that, as and when the dissipative term comes into a balanced condition with the nonlinear and dispersive term in nonlinear wave propagation in a plasma medium, one encounters the shock wave phenomenon or otherwise the solitary wave phenomenon [11][12][13][14]. The kinematic viscosity, ion-neutral collisions, dust-neutral collisions etc, which are basically wave damping factors, are the cause of dissipation, which results in the formation of shock waves in plasma.…”