No abstract

The computer simulation has become an important means to study fire broke out and its law of development today. Fire Dynamics Simulator is three-dimensional computational fluid dynamics software based on LES. And it is widely used in the field of fire science. However, it is rarely used in the study of forest fires. Through the study of tree morphological parameters,combined with the modeling features of the pre and post-processing graphical software PyroSIM, this article explored a tree modeling method for FDS.

The fault injection technology is an important aspect in testability verification, because the actual fault injection in equipment can damage itself, so using circuit simulation fault injection method to instead. Research on the simulation method that based on PSPICE, using VC++ software to design a simulated fault injection system, its structure and function to achieve workflow introduced. Finally, taking a circuit for example uses the system to fault injection and analysis to prove the availability and correctness of the system.

. Fire-control radar network can not only improve the tracking accuracy of the system, but also can take some peculiar mode of networking against enemy reconnaissance aircraft. As opposed to the real test, simulation has a huge advantage in terms of the timeliness and the economy. In this paper, build a netted fire-control radar counter-surveillance network simulation system, and study the main features and workflow of the fusion control center and dispatch center, some key issues are discussed, such as map load and online estimated probability of intercept.

A range profile synthetic algorithm of the stepped-frequency chirp train waveform is designed to obtain HRRP (High Resolution Range Profile) in this paper. Based on waveform model, grating lobes restraining method is proposed with the help of autocorrelation function. Due to the matched filter operation, image energy spill over the close range bins, which causes “ghost images”. Set parameters of inner pulse bandwidth, stepped frequency and chirp compression envelop sampling frequency properly, and then carry the synthetic algorithm, the “ghost images” are restrained. All of the results are validated by simulation.