To expand scanning area and attack range without changing the inner structure of intelligent warhead, a new arrangement mode of the scanner for intelligent mine is proposed. The required coordinate systems are es...To expand scanning area and attack range without changing the inner structure of intelligent warhead, a new arrangement mode of the scanner for intelligent mine is proposed. The required coordinate systems are established firstly on the basis of advanced dynamics principle. and the exterior ballistics equations are deduced. Then the equations of scanning trails are established by the method of space analytic geometry. To get the scanning trails. the differential equations are transformed into discrete simulation model using the algorithm of fourth order Runge-Kutta and then are simulated using Matlab. Compared with the scanning trails obtained by the traditional layout of scanner, the scanning trails obtained by the proposed layout of scanner has larger horizontal range of scanning circle and bigger trarget acquisition probability. Therefore, the new arrangement mode of the scanner for intelligent mine can increase attack range.展开更多
The optimum moderator geometry increases the performance of prompt gamma neutron activation analysis (PGNAA) method considerably.In this work an ^(241)Am-Be source was used in the moderator geometry for detecting buri...The optimum moderator geometry increases the performance of prompt gamma neutron activation analysis (PGNAA) method considerably.In this work an ^(241)Am-Be source was used in the moderator geometry for detecting buried landmines by PGNAA method.Experiments were done to find the best moderator geometry for the moderated ^(241)Am-Be source,by replacing the mine with a neutron detector and counting the thermal neutron flux.The flux of thermal neutrons at the place of mine was used as a determining factor to introduce the best moderator geometry.展开更多
文摘To expand scanning area and attack range without changing the inner structure of intelligent warhead, a new arrangement mode of the scanner for intelligent mine is proposed. The required coordinate systems are established firstly on the basis of advanced dynamics principle. and the exterior ballistics equations are deduced. Then the equations of scanning trails are established by the method of space analytic geometry. To get the scanning trails. the differential equations are transformed into discrete simulation model using the algorithm of fourth order Runge-Kutta and then are simulated using Matlab. Compared with the scanning trails obtained by the traditional layout of scanner, the scanning trails obtained by the proposed layout of scanner has larger horizontal range of scanning circle and bigger trarget acquisition probability. Therefore, the new arrangement mode of the scanner for intelligent mine can increase attack range.
文摘The optimum moderator geometry increases the performance of prompt gamma neutron activation analysis (PGNAA) method considerably.In this work an ^(241)Am-Be source was used in the moderator geometry for detecting buried landmines by PGNAA method.Experiments were done to find the best moderator geometry for the moderated ^(241)Am-Be source,by replacing the mine with a neutron detector and counting the thermal neutron flux.The flux of thermal neutrons at the place of mine was used as a determining factor to introduce the best moderator geometry.
