As an indispensable part of </span><span style="font-family:Verdana;">global</span><span style="font-family:Verdana;"> satellite navigation system, the frequency band of DME...As an indispensable part of </span><span style="font-family:Verdana;">global</span><span style="font-family:Verdana;"> satellite navigation system, the frequency band of DME will overlap with that of the navigation signal, which will cause the signal from the DME platform to be accepted by the Global Navigation Satellite System receiver and form interference. Therefore, it is of great significance to study an effective algorithm to suppress DME pulse interference. This paper has the following research on this problem. In this paper, wavelet packet transform is used to solve for the suppression of </span><span style="font-family:Verdana;">DME</span><span style="font-family:Verdana;"> pulse interference method, wavelet packet analysis belongs to the linear time-frequency analysis method, it has good time-frequency localization characteristics and the signal adaptive ability, due to the function of wavelet packet and parameter selection of DME will affect the ability of interference suppression, combining with the theory of wavelet </span><span style="font-family:Verdana;">threshold</span><span style="font-family:Verdana;">, function type and decomposition series are discussed to prove the validity of the selected parameters on the pulse interference suppression</span></span></span><span style="font-family:Verdana;"><span style="font-family:Verdana;"><span style="font-family:Verdana;">.展开更多
目的了解近10年国际灾害护理的研究概况及发展趋势,为我国灾害护理学科发展提供借鉴。方法筛选web of science核心合集数据库2010年1月-2020年12月disaster nursing主题的文献,采用CiteSpaceⅢ绘制国际灾害护理研究领域的科学知识图谱...目的了解近10年国际灾害护理的研究概况及发展趋势,为我国灾害护理学科发展提供借鉴。方法筛选web of science核心合集数据库2010年1月-2020年12月disaster nursing主题的文献,采用CiteSpaceⅢ绘制国际灾害护理研究领域的科学知识图谱。结果共检索到3474篇相关文献,美国研究机构发文量居第1位,“disaster”(1086次)为高频关键词,具体内容为灾害救援、灾害护理学教育、灾后影响以及灾害护理能力培训等方面。结论国际灾害护理研究发展迅速,还需加强多学科跨国合作,推进灾害护理学的横向与纵向发展。展开更多
文摘As an indispensable part of </span><span style="font-family:Verdana;">global</span><span style="font-family:Verdana;"> satellite navigation system, the frequency band of DME will overlap with that of the navigation signal, which will cause the signal from the DME platform to be accepted by the Global Navigation Satellite System receiver and form interference. Therefore, it is of great significance to study an effective algorithm to suppress DME pulse interference. This paper has the following research on this problem. In this paper, wavelet packet transform is used to solve for the suppression of </span><span style="font-family:Verdana;">DME</span><span style="font-family:Verdana;"> pulse interference method, wavelet packet analysis belongs to the linear time-frequency analysis method, it has good time-frequency localization characteristics and the signal adaptive ability, due to the function of wavelet packet and parameter selection of DME will affect the ability of interference suppression, combining with the theory of wavelet </span><span style="font-family:Verdana;">threshold</span><span style="font-family:Verdana;">, function type and decomposition series are discussed to prove the validity of the selected parameters on the pulse interference suppression</span></span></span><span style="font-family:Verdana;"><span style="font-family:Verdana;"><span style="font-family:Verdana;">.
文摘目的了解近10年国际灾害护理的研究概况及发展趋势,为我国灾害护理学科发展提供借鉴。方法筛选web of science核心合集数据库2010年1月-2020年12月disaster nursing主题的文献,采用CiteSpaceⅢ绘制国际灾害护理研究领域的科学知识图谱。结果共检索到3474篇相关文献,美国研究机构发文量居第1位,“disaster”(1086次)为高频关键词,具体内容为灾害救援、灾害护理学教育、灾后影响以及灾害护理能力培训等方面。结论国际灾害护理研究发展迅速,还需加强多学科跨国合作,推进灾害护理学的横向与纵向发展。