The scope of shooting range scatter should be considered in the guidance process of wire-guided torpedo to ensure it entering into the area,where torpedo can implement effective homing to target.Based on the needs for the simulation of operation platform,operational effectiveness evaluation for equipment,and development of weapon operational method,this paper analyses the reasons why the scatter of wire-guided torpedo happens with a consideration of different control and guidance modes.The position scatter can be divided into the shooting range scatter and the ship scatter and the former is primary.Therefore,some mathematical models in three aspects of shooting range scatter are established,and the error scopes of range,horizon and depth are calculated.According to the above results,it is concluded that the scope of position scatter in the guidance process of wire-guided torpedo is a flat elliptical sphere.

The problem of radar-ESM tracks correlation is precondition in the research of integrated data processing for asynchronous sensors.The method of χ2 distribution is which we always selected beforetime,but we would find the demerits such as much computational work and complicated determination of the threshold when we used it.In this article,it puts forward a algorithm of double-threshold tracks correlation based on normal distribution correlation discriminant function,using quantiles of normal distribution to determine the threshold and avoiding complicated determination in χ2 distribution.The simulation results validate the rough set and random set of decision-making rules and show the feasibility of the algorithm.

由于诸多因素的影响,导致了低频无线电导航系统的定位误差和GPS卫星导航系统的定位误差之间存在较大的差距,拟采用径向基函数(RBF)网络来预测电波传播误差,以期达到修正现有低频无线电导航系统定位误差的目的,从而进一步提高低频无线电导航定位的精度。

The data processing method of warship observation orientation based on polynomial segment fitting, and the sequences of observation orientation were processed in segment. The fitting polynomial was used to measure orientation sequence approximately so that the command control center didn’t need to store a lot of data and the storage of command control center was improved. The simulation proved that the error of this method is less than other methods.

Nowadays it has become clear that neither the United States nor the international community will adopt a sole-means satellite navigation system. Therefore, when we use the RDSS, we must continue to research the LORAN-C which can be uniquely suited to complement RDSS and develop the potential of integrated navigation of RDSS/LORAN-C. This paper gives three different modes of integrated navigation of RDSS/LORAN-C and the simple performance comparison among these modes.

In campus accounting system based on identity certification, it is very important to confirm the identity of users and prevent IP address embezzlement. Taking identity certification system of campus network for example, this article describes the theory and implement in detail.