本文在采用双通道相位偏置天线(Displaced Phase Center Antenna,DPCA)的基础上,将DPCA中每一个通道的天线进行子图像划分,再结合两个通道所得的子图像作幅值对消,实现杂波抑制与运动目标的检测。该方法在运动目标具有方位向速度或距离...本文在采用双通道相位偏置天线(Displaced Phase Center Antenna,DPCA)的基础上,将DPCA中每一个通道的天线进行子图像划分,再结合两个通道所得的子图像作幅值对消,实现杂波抑制与运动目标的检测。该方法在运动目标具有方位向速度或距离向加速度时可获得比传统DPCA更好的检测效果,并通过剪切平均的方法实现运动目标的聚焦。本文首先介绍了DPCA与单通道中子图像对消的基本原理;其次,提出了将DPCA与子图像对消相结合的运动目标检测新方法,并通过剪切平均的方法聚焦运动目标;最后,本文给出了运用该方法的具体步骤,并通过仿真实验验证了本方法的有效性。展开更多
Glass films of B2O3-SiO2 and RO-B2O3-SiO2 (RO: CaO, MgO, ZnO) system wereprepared by sol-gel process.X-ray diffraction of gels was examided. Ralation oftransmissivity of films to RH,H2O/Si(OC2H5)4(mol), content of B2O...Glass films of B2O3-SiO2 and RO-B2O3-SiO2 (RO: CaO, MgO, ZnO) system wereprepared by sol-gel process.X-ray diffraction of gels was examided. Ralation oftransmissivity of films to RH,H2O/Si(OC2H5)4(mol), content of B2O3 was measured.Ralation between gelling time and H2O/Si (OC2H5)4(mol) was investigated.IR spectra ofgel and glass of 10B2O3.90SiO2 and 5MgO.10B2O3.80SiO2 system were also measured. Transformation from gel into glass was verified.This work provides a now refereace forpreparation of glass films of boric-silicate by sol-gel process.展开更多
文摘本文在采用双通道相位偏置天线(Displaced Phase Center Antenna,DPCA)的基础上,将DPCA中每一个通道的天线进行子图像划分,再结合两个通道所得的子图像作幅值对消,实现杂波抑制与运动目标的检测。该方法在运动目标具有方位向速度或距离向加速度时可获得比传统DPCA更好的检测效果,并通过剪切平均的方法实现运动目标的聚焦。本文首先介绍了DPCA与单通道中子图像对消的基本原理;其次,提出了将DPCA与子图像对消相结合的运动目标检测新方法,并通过剪切平均的方法聚焦运动目标;最后,本文给出了运用该方法的具体步骤,并通过仿真实验验证了本方法的有效性。
文摘Glass films of B2O3-SiO2 and RO-B2O3-SiO2 (RO: CaO, MgO, ZnO) system wereprepared by sol-gel process.X-ray diffraction of gels was examided. Ralation oftransmissivity of films to RH,H2O/Si(OC2H5)4(mol), content of B2O3 was measured.Ralation between gelling time and H2O/Si (OC2H5)4(mol) was investigated.IR spectra ofgel and glass of 10B2O3.90SiO2 and 5MgO.10B2O3.80SiO2 system were also measured. Transformation from gel into glass was verified.This work provides a now refereace forpreparation of glass films of boric-silicate by sol-gel process.