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1550nm技术的不断进步,光设备的不断成熟和商用化。推动了数字电视整体平移和快速发展。本文介绍了遵义市从2003年开始建设数字电视传输自愈环,在探索中创新,不断优化技术方案,确保高质量既经济又安全的传输。 相似文献
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We present here the results of observation of very high energy(VHE) gamma-ray emission from Crab Pulsar with the Beijing Atmospheric Cerenkov Telescopes, named ACT2 and ACT3, during the 1995-1996 season. The data are based on 168 h (ACT2) and 125 h (ACT3) of exposure over the period of observation in tracking mode. After converting the event time to the solar barycentre, the data have been searched for evidence of pulsed emission at 33 ms period of Crab Pulsar. We found no steady emission of VHE Gamma-ray with 33 ms period at the time scale of month or nights. But there are two evidences of sporadic emission over an hour duration with the same period as the one at radio wave band. 相似文献
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本文结合遵义市数字电视传输自愈环建设,浅谈对数字电视技术指标内涵认识的不断深化及其在工程实践中运用。 相似文献
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