Carbide Identification in Different Regions of a Thin Metal Film Covering on an HPHT As-Grown Diamond Single Crystal from Ni-Mn-C System

Diamond single crystals were synthesized in the presence of NI-Mn catalyst under high temperature and high pressure(HPHT).A thin metal film covering on as-grown diamond formed during diamond growth was examined using transmission electron microscopy.It was shown that phase compositions of the region near the as-grown diamond are different form those of other regions in the film.     

一种新型GNSS/MEMS紧组合导航系统设计

针对探空火箭在高动态与非线性环境下高精度导航问题,基于DSP6747+FPGA双核构架,设计了一种低成本的新型GNSS/MEMS一体化紧组合导航系统。同时,在直接法滤波的基础上采用了改进的自适应渐消扩展卡尔曼粒子滤波(PF-AFEKF)算法,解决了粒子退化问题并充分利用了当前观测信息以及自适应权重因子抑制了滤波发散,实现了高动态、非线性状态下的GNSS/MEMS深度信息融合。最后,进行了地面跑车试验,试验结果证明了所设计的低成本GNSS/MEMS紧组合导航系统具有较高的导航精度,容错能力强。