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Ray-space数据片内和片间相关性压缩分析
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作者 邵枫 蒋刚毅 +1 位作者 郁梅 陈偕雄 《光电工程》 EI CAS CSCD 北大核心 2006年第2期85-89,共5页
Ray-space数据特征分析表明,其片内和片间均存在很大相关性,并且其数据有明显的方向性特征。通过最优宏块分割、不同精度的块匹配和多参考片预测结果分析,讨论了适合Ray-space数据特点的片内和片间预测技术。与传统的只利用片内相关性... Ray-space数据特征分析表明,其片内和片间均存在很大相关性,并且其数据有明显的方向性特征。通过最优宏块分割、不同精度的块匹配和多参考片预测结果分析,讨论了适合Ray-space数据特点的片内和片间预测技术。与传统的只利用片内相关性的压缩技术相比,利用上述两类相关性,并结合Ray-space数据方向性特征,能进一步提高编码压缩效率。在获得相同重建图像质量下,可使基于H.264的Ray-space压缩方法比基于H.263的方法在码率上节省50%,比JPEG的方法节省75%左右。 展开更多
关键词 rayspace 片内相关 片间相关 编码效率
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The HEPD particle detector of the CSES satellite mission for investigating seismo-associated perturbations of the Van Allen belts 被引量:6
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作者 AMBROSI Giovanni BARTOCCI Simona +39 位作者 BASARA Laurent BATTISTON Roberto BURGER William J. CARFORA Luca CASTELLINI Guido CIPOLLONE Piero CONTI Livio CONTIN Andrea DE DONATO Cinzia DE SANTIS Cristian FOLLEGA Francesco M. GUANDALINI Cristina IONICA Maria IUPPA Roberto LAURENTI Giuliano LAZZIZZERA Ignazio LOLLI Mauro MANEA Christian MARCELLI Laura MASCIANTONIO Giuseppe MERGE Matteo OSTERIA Giuseppe PACINI Lorenzo PALMA Francesco PALMONARI Federico PANICO Beatrice PATRIZII Laura PERFETTO Francesco PICOZZA Piergiorgio POZZATO Michele PUEL Matteo RASHEVSKAYA Irina RICCI Ester RICCI Marco RICCIARINI Sergio Bruno SCOTTI Valentina SOTGIU Alessando SPARVOLI Roberta SPATARO Bruno VITALE Vincenzo 《Science China(Technological Sciences)》 SCIE EI CAS CSCD 2018年第5期643-652,共10页
CSES(China Seismo-Electromagnetic Satellite) is a mission developed by CNSA(Chinese National Space Administration) and ASI(Italian Space Agency), to investigate the near-Earth electromagnetic, plasma and particle envi... CSES(China Seismo-Electromagnetic Satellite) is a mission developed by CNSA(Chinese National Space Administration) and ASI(Italian Space Agency), to investigate the near-Earth electromagnetic, plasma and particle environment, for studying the seismo-associated disturbances in the ionosphere-magnetosphere transition zone. The anthropogenic and electromagnetic noise,as well as the natural non-seismic electromagnetic emissions is mainly due to tropospheric activity. In particular, the mission aims to confirming the existence of possible temporal correlations between the occurrence of earthquakes for medium and strong magnitude and the observation in space of electromagnetic perturbations, plasma variations and precipitation of bursts with highenergy charged particles from the inner Van Allen belt. In this framework, the high energy particle detector(HEPD) of the CSES mission has been developed by the Italian LIMADOU Collaboration. HEPD is an advanced detector based on a tower of scintillators and a silicon tracker that provides good energy and angular resolution and a wide angular acceptance, for electrons of 3–100 Me V, protons of 30–200 Me V and light nuclei up to the oxygen. CSES satellite has been launched on February 2^(nd), 2018 from the Jiuquan Satellite Launch Center(China). 展开更多
关键词 earthquake seismic-precursors particle detector Van Allen belts magnetosphere ionosphere space weather cosmic rays
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