The article based on the analysis of the work principle of the torpedo magnetic fuse, according to the specific circumstances of the received signal of the torpedo magnetic fuse, proposed to use the two electrodes direct opening mode magnetic field source to simulate the warship magnetic field signal of the torpedo explosive induce magnetic fuse action. The Simulating calculation shows that the magnetic field of the magnetic bait has good simulation effect; it can effectively induce the torpedo magnetic fuse.

The reasonable definitions of samples and their feature weights in weighted fuzzy clustering algorithm based on the thought of normalization and each computational formula are presented. Banding together with computational formulas of samples and their feature weights which derived in weighted FCM, we can get the regions of sample’s weight parameter() and sample feature’s weight parameter(). Then divide the regions into intervals, point out the clustering situations in different intervals and how changing of and affect the clustering result and the choice of feature.Try to explore the relationship between weightd parameter(、) and fuzzy constant(m). Finally, test result demonstrates the validity of the regions of parameter and its partition.

This paper is based on Point-electrode model of electric field of steady current in sea, and regards the seawater as lining,uniformity and apiece-direction congenialitily half-infinity conductor space. Founding on the comparability of steady current field and static current field,the paper calculates the distribution of circle-electrode's electric potential of the steady current in the three-layers medium(air-sea water-seabed) by image method and gets the expession. Thus the paper takes the model of the circle-electrode's electric field of steady current of in the sea .

Based on the steady current field model of the point electrode in the three-layers media (air-seawater-seabed), the calculation model of the magnetic field generated by the current in the seawater or air was derived and validated, and the model was spread out to the distributing of magnetic field in the insulation semi-space of the n-layers media. Any point value of the magnetic field in the seawater and air can be calculated based on formulas. The results of the calculation indicated that the magnetic field generated by the point electrode in the seawater and air has obvious distribution character.

This paper introduces a novel GA-based algorithm for location of moving time-harmonic magnetic dipole. Based on the function of propagation of underwater electromagnetic wave, the new location method with the amplitude of the electromagnetic wave picked out from receiving signals is proposed. According to the overall search ability of the genetic algorithm, the passive location of the radiant point about the time-harmonic dipole was achieved by the using of characteristic quantity of the amplitude. The result of the simulation validated that: within the underwater measurement distance, higher precision of passive location can be achieved by using the method based on genetic algorithm.