A multi-objective optimization model multi-base multiple UAVs cooperative reonnaissance problem(M-MUCRP)is presented for multi-base multiple unmanned aerial vehicles(UAVs)cooperative reconnaissance problem,which is more suitable for military applications.

Under the condition of active and passive combined multi-base air anti-submarine, the mathematics model for target locating, according to the relationship among the positions of sonar, buoy and submarine is derived.

According to the space geometry site relationship of active sonar, target and passive buoys in combine multi-base aviation searching submarine, the target location mathematical model which related with the sound transmission time from active sonar to passive buoys is established.

In this paper the differential quadrature method was employed for the analysis of the one-dimensional nonlinear consolidation of multi-layered soil, based on the nonlinear consolidation theory proposed by Davis and Raymond, also considering the initial effective stress distribution, arbitrary boundary and loading condition.

A status control boundary value method(SCBVM) is proposed for the analysis of a laterally loaded pile in multi-layered soils.

Based on the equivalent settlements of rigid circular plate,the continuity and smooth contact conditions between subsoil surface and rigid circular plate,the dual integral equation of the interaction stresses between the rigid circular plate and multi-layered soil,was deduced after introducing Hankel transform.

Analysis of pile′s load transfer in layered soils;

An analytical solution is given to the problem of calculation of effective stress for a layered ground under one-dimensional upward seepage.

A new method of analysis on the lateral loaded pile in multi layered soil is derived.

Simulation of flight target echo for bistatic/multistatic HF ground wave radar;