期刊文献+
共找到4篇文章
< 1 >
每页显示 20 50 100
一种基于集体检测理论的GPS直接位置估计实现方法 被引量:3
1
作者 陈万通 汪竹青 刘庆 《航天控制》 CSCD 北大核心 2019年第3期8-12,30,共6页
传统GPS导航定位解算方法需要事先成功捕获、跟踪并实时获取多颗卫星的伪距测量,不适用于弱信号环境下卫星信号无法捕获的场景。集体检测是一种将各卫星信号的相关能量非相干累加后依据极大似然准则进行直接位置估计的理论。本文基于A-... 传统GPS导航定位解算方法需要事先成功捕获、跟踪并实时获取多颗卫星的伪距测量,不适用于弱信号环境下卫星信号无法捕获的场景。集体检测是一种将各卫星信号的相关能量非相干累加后依据极大似然准则进行直接位置估计的理论。本文基于A-GPS提供的先验信息,提出了一种实现集体检测的具体参数估计方法和搜索策略,并基于真实GPS弱信号验证了算法的实际性能。实际试验表明,本方法与信号是否成功捕获和跟踪无关,适用于弱信号等环境下的定位解算。 展开更多
关键词 全球定位系统 集体检测 直接位置估计 弱信号
下载PDF
一种基于协同定位技术的集体检测算法
2
作者 袁凡 黄海生 李鑫 《计算机应用与软件》 北大核心 2020年第9期253-257,共5页
针对城市峡谷环境中普通接收机无法实现定位的问题,提出一种基于协同定位技术集体检测卫星的算法。用MATLAB R2016a模拟GPS L1频段的卫星信号,建立数学模型验证该算法的可行性,并分析其计算复杂度和定位精度。实验结果表明,算法复杂度... 针对城市峡谷环境中普通接收机无法实现定位的问题,提出一种基于协同定位技术集体检测卫星的算法。用MATLAB R2016a模拟GPS L1频段的卫星信号,建立数学模型验证该算法的可行性,并分析其计算复杂度和定位精度。实验结果表明,算法复杂度降低了至少90%,将城市峡谷环境中的定位精度提升至4 m以内,有效地弥补了接收机定位场景的缺陷。 展开更多
关键词 城市峡谷环境 协同定位 集体检测
下载PDF
Advances in the Detection of Mycoplasma hyopneumoniae by Polymerase Chain Reaction (PCR) Technology
3
作者 张旭 武昱孜 +5 位作者 白方方 刘茂军 冯志新 熊祺琰 张映 邵国青 《Agricultural Science & Technology》 CAS 2013年第2期215-220,261,共7页
Mycoplasma hyopneumoniae is an important pathogen causing Mycoplasmal pneumonia of swine, which generally causes secondary infections and mixed infections, thus seriously threats the development of swine industry and ... Mycoplasma hyopneumoniae is an important pathogen causing Mycoplasmal pneumonia of swine, which generally causes secondary infections and mixed infections, thus seriously threats the development of swine industry and resulting in huge economic losses. Using PCR technology has very important significance to the correct diagnosis of Mycoplasmal pneumonia at the early stage. In this paper, specific target genes of Mycoplasma hyopneumoniae, methods for clinical sample collection, key technical factors of DNA sample processing method, and the research progress, main advantages and disadvantages, and application of general PCR technology, multiple PCR technology, nested-PCR technology, real-time fluorescence quantitative PCR technology, gene chip detection technology and loop-mediated isothermal amplification in detection of Mycoplasma hyopneumoniae were summarized, which provided convenience for the effective diagnosis and prevention of Mycoplasmal pneumonia of swine. 展开更多
关键词 Mycoplasmal pneumonia of swine Mycoplasma hyopneumoniae PCR detection Clinical sample collection
下载PDF
Robust and efficient quantum private comparison of equality with collective detection over collective-noise channels 被引量:6
4
作者 HUANG Wei WEN QiaoYan +2 位作者 LIU Bin GAO Fei SUN Ying 《Science China(Physics,Mechanics & Astronomy)》 SCIE EI CAS 2013年第9期1670-1678,共9页
We present a protocol for quantum private comparison of equality(QPCE) with the help of a semi-honest third party(TP).Instead of employing the entanglement,we use single photons to achieve the comparison in this proto... We present a protocol for quantum private comparison of equality(QPCE) with the help of a semi-honest third party(TP).Instead of employing the entanglement,we use single photons to achieve the comparison in this protocol.By utilizing collective eavesdropping detection strategy,our protocol has the advantage of higher qubit efficiency and lower cost of implementation.In addition to this protocol,we further introduce three robust versions which can be immune to collective dephasing noise,collective-rotation noise and all types of unitary collective noise,respectively.Finally,we show that our protocols can be secure against the attacks from both the outside eavesdroppers and the inside participants by using the theorems on quantum operation discrimination. 展开更多
关键词 quantum private comparison of equality collective detection collective noise
原文传递
上一页 1 下一页 到第
使用帮助 返回顶部