论文部分内容阅读
A Carrier Synchronization Algorithm for Autonomous Radio Receiver in Deep Space
【出 处】
：
空间科学学报
【发表日期】
：
2004年期
其他文献
Fluid flow and fluid shear stress in canaliculi induced by external mechanical loading and blood pre
现有的许多显著目标检测算法,大都依赖像素间的相互关系,而缺乏对焦点对象特征的理解.本文提出了一种无监督的显著目标自动识别算法.首先,应用具有仿生学特质的多尺度Gabor模型检测图像中的初级特征,构成显著目标的基本元素特征.在此基础上,结合显著目标的自身特性定义图像的局部特征,进一步确定感兴趣区域的位置.最后,在模糊阈值算法的基础上提出一种新的提取策略,并将其应用到由初级特征和局部特征构成的显著图上
针对碲镉汞红外焦平面需要在恒定低温条件下工作的要求,设计并实现了基于热电制冷技术的红外焦平面温控系统。该温控系统具有体积小、响应速度快、可控性好及温控精度高等特
利用平衡合金法研究Mg-Zn-Ce系富镁角在400℃时各金属间化合物的相成分、相结构及相关系.研究表明,Mg-Zn-Ce系富镁角丰在一个线性化合物T相,其化学式为(Mg1-xZnx)llCe.T相中Z
通过直流平衡磁控溅射法在NiTi形状记忆合金基底上制备纯Zr膜,并采用SEM、XRD、XPS等对Zr膜的组织结构进行研究。结果表明:Zr膜具有晶带T型结构,组织保持细小致密的纤维状特
The subcellular localization of samarium and europium, two rare-earths, increasingly used in both medical and industrial fields, has been studied in several org
A novel two-degree-of-freedom spherical ultrasonic motor using three travelling-wave type annular st
In order to promote the tolerance and controllability of the multi-degree-of-freedom (M-DOF) ultrasonic motor, a novel two-degree-of-freedom (2-DOF) spherical u
以改进液相化学法合成铁酸锌纳米磁流体来代替传统的铁氧化物磁粉,同时以D,L型丙交酯与丙氨酸为单体进行本体聚合,得到氨基酸改性聚乳酸,再以改性聚乳酸包封纳米磁流体构建磁
By examining the second leading mode (EOF2) of the summer rainfall in China during 1958-2001 and associated circulations,the authors found that this prominent m
Microstructure and microwave dielectric properties of Ba6-3xSm8+2xTi18Os4ceramics with various BaxSr
The Ba6-3xSm8+2xTi18O54 (x=2/3) microwave dielectric ceramics were prepared by traditional solid sate reaction technique.The experiment was based on the Ba6-3xS