Voronoi图在航迹规划中的应用

航迹规划对军用飞行器完成任务具有重要的意义。Voronoi图由于其特有的简易性,近几年来逐步应用到航迹规划中。给出利用Voronoi图进行航迹规划的方法,针对实际的战场环境以及传统Voronoi图的不足,利用改进后的Voronoi图进行航迹规划。传统的Voronoi图难以满足实际的需要,当威胁体的等级并不相同以及突发威胁体的情形下,必须进行Voronoi图的重构以及航迹的重规划,因此在威胁体的威胁等级不同的情况下介绍了如何重新构造Voronoi图的方法,指出了突发威胁体的情况如何确定该威胁体的等级。最后给出了利用Voronoi图进行航迹规划以及重规划仿真结果,验证了Voronoi图在航迹规划中的可行性。     

Magnetic and Optical Properties of the TiO2-Co-TiO2 Composite Films Grown by Magnetron Sputtering

The TiO2-Co-TiO2 sandwich films were successfully grown on glass and silicon substrata making alternate use of radio frequency reactive magnetron sputtering and direct current magnetron sputtering. The structures and properties of these films were identified with X-ray diffraction (XRD), Raman spectra and X-ray photoemission spectra (XPS). It is shown that the sandwich film consists of two anatase TiO2 films with an embedded Co nano-film. The fact that, when the Co nano-film thickens, varied red shifts appear in optical absorption spectra may well be explained by the quantum confinement and tunnel effects. As for magnetic properties, the saturation magnetization, remnant magnetic induction and coercivity vary with the thickness of the Co nano-films. Moreover, the Co nano-film has a critical thickness of about 8.6 nm, which makes the coercivity of the composite film reach the maximum of about 1413 Oe.