共查询到19条相似文献,搜索用时 62 毫秒
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干涉SAR在遥感测量中的应用 总被引:1,自引:0,他引:1
目的:论述干涉SAR技术在遥感测量中的应用,方法:在回顾干涉SAR发展历史之后,详细地说明了干涉SAR的工作原理和信号处理技术,最后讨论了干涉SAR广泛的应用现状和前景,结果:干涉SAR技术可以广泛应用于DEM测量及地球测绘的多个方面,结论:这项技术将会得到更大的发展,中国应广泛开展干涉SAR技术的应用研究。 相似文献
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干涉图条纹数据的快速自动采集 总被引:1,自引:0,他引:1
干涉图条纹的数据采集是干涉图数据处理的前提和基础,提出了一种有效的从数字化干涉图中由计算机自动采集干涉条纹数据的算法,该算法的主要特点是首先用尺度验证技术对灰值干涉图进行干涉条纹细化,然后利用细化后的二值干涉图对干涉条纹进行条纹跟踪和数据采集。 相似文献
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本文介绍了利用CCD 固体摄象传感器和386微机动态测量 F—P 多光束干涉条纹的方法,介绍了实现动态检测的原理和软件设计思想,利用此原理,提出了一种微小位移的高精度动态测量方法,采用无畸变摄象物镜和精密伺服系统,相应微小位移的测试精度可达3nm—6nm(约λ/100的数量级)。 相似文献
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怎样客观地进行干涉条纹测量并提高干涉条纹读数分辨力及读数准确度是进行一等量块检测的首要前提条件,本文介绍利用激光与数值化图像处理技术分析与解决这一问题。 相似文献
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介绍了表面粗糙度干涉图像处理和该系统以静态干涉图像处理技术对表面粗糙度检测的过程。该系统通过对一帧白光干涉图像的处理,可对Ra值≤0.2μm的多刻线样板,试件表面粗糙度绝对、非接触、快速、自动地测量;该系统通过对白光和纳光二帧干涉图象的联合处理,以白光定位、纳光定度可对沟槽深度H≤5μm的标准单位刻线深度绝对,非接触,准确地测量。 相似文献
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João Varajão 《国际生产研究杂志》2013,51(11):3342-3354
This paper proposes the joint use of the AHP (Analytic Hierarchy Process) and the ICB (IPMA Competence Baseline), as a tool for the decision-making process of selecting the most suitable managers for projects. A hierarchical structure, comprising the IPMA’s ICB 3.0 contextual, behavioural and technical competence elements, is constructed for the selection of project managers. It also describes the AHP implementation, illustrating the whole process with an example using all the 46 ICB competence elements as model criteria. This tool can be of high interest to decision-makers because it allows comparing the candidates for managing a project using a systematic and rigorous process with a rich set of proven criteria. 相似文献
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LI Yan GAO Feng Lin Ting-qi 《国际设备工程与管理》2005,10(4):208-213
1Introduction Mobilerobotsaredevelopingtowardsintellectualization,whichdependsonthedevelopmentofsensor technologytotheutmostextent.Theinformationfusiontechnologyhasovercomethedrawbackresul tingfromtheapplicationofasingletonsensor.Forthesamereason,inordertoenhancetheposition precisionofthemobilerobot,morethanonesensorisoftenneededtogenerateandmaintainarelia blestateestimation[1].Furthermore,thecomputationcomplexityofdealingwiththesensordatawil oftenbringonsignificanttimedelaysfromtheacquisition… 相似文献
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In communication channel estimation, the Least Square (LS) technique has long been a widely accepted and commonly used principle. This is because the simple calculation method is compared with other channel estimation methods. The Minimum Mean Squares Error (MMSE), which is developed later, is devised as the next step because the goal is to reduce the error rate in the communication system from the conventional LS technique which still has a higher error rate. These channel estimations are very important to modern communication systems, especially massive MIMO. Evaluating the massive MIMO channel is one of the most researched and debated topics today. This is essential in technology to overcome traditional performance barriers. The better the channel estimation, the more accurate it is. This paper investigated machine learning (ML) for channel estimation. ML channel estimations based on the Extreme Learning Machine (ELMx) group are also implemented. These estimations, known as the ELMx group, include Regularized Extreme Learning Machine (RELM) and Outlier Robust Extreme Learning Machine (ORELM). Then, it was compared with LS and MMSE. The simulation results reveal that the ELMx group outperforms LS and MMSE in channel capacity and bit error rate. Additionally, this paper has proven complexity for verified computational times. The RELM method is less time consuming and has low complexity which is suitable for future use in large MIMO systems. 相似文献
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周兆经 《中国计量学院学报》1993,(2)
本文论述了非平稳信号瞬时频率(IF)的估计方法,包括基干最小均方误差(LMS)算法或递推最小二乘(RLS)算法的自适应IF估计方法和基于信号相位多项式模型的IF估计方法。对各种估计方法的估计方差与理论方差下限进行了比较。说明了,基于互Wigner分布的估计方法所需信噪比(SNR)门限值最低。在低SNR、短信号记录的情况下,用多项式相位模型与最大似然法可以获得比较可靠的IF估计。 相似文献