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航天器测试软件系统应具备的主要功能
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作者 叶伟明 《航天器工程》 2001年第4期29-32,共4页
为适应不同用途航天器的需求,缩短制造周期,提高可重用性,降低成本,保证可靠性,降低甚至消除错误率,完善的测控设备的应用软件系统一般须具备以下总体功能及特性:(1)多进程多平台分布式运行;(2)多平台多操作系统可移植性;(3)高度可配置... 为适应不同用途航天器的需求,缩短制造周期,提高可重用性,降低成本,保证可靠性,降低甚至消除错误率,完善的测控设备的应用软件系统一般须具备以下总体功能及特性:(1)多进程多平台分布式运行;(2)多平台多操作系统可移植性;(3)高度可配置功能模块;(4)功能的可扩展性,可重用性;(5)完备的测试控制语言;(6)归档储存及回放运行;(7)单一集中多用途数据库;(8)方便易学的人机接口。就以上8个方面进行研究和讨论。 展开更多
关键词 航天器测试 测试软件 系统功能 归档储存 分布式运行 人机接口
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A content aware chunking scheme for data de-duplication in archival storage systems
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作者 Nie Xuejun Qin Leihua Zhou Jingli 《High Technology Letters》 EI CAS 2012年第1期45-50,共6页
Based on variable sized chunking, this paper proposes a content aware chunking scheme, called CAC, that does not assume fully random file contents, but tonsiders the characteristics of the file types. CAC uses a candi... Based on variable sized chunking, this paper proposes a content aware chunking scheme, called CAC, that does not assume fully random file contents, but tonsiders the characteristics of the file types. CAC uses a candidate anchor histogram and the file-type specific knowledge to refine how anchors are determined when performing de- duplication of file data and enforces the selected average chunk size. CAC yields more chunks being found which in turn produces smaller average chtmks and a better reduction in data. We present a detailed evaluation of CAC and the experimental results show that this scheme can improve the compression ratio chunking for file types whose bytes are not randomly distributed (from 11.3% to 16.7% according to different datasets), and improve the write throughput on average by 9.7%. 展开更多
关键词 data de-duplicate content aware chunking (CAC) candidate anchor histogram (CAH)
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