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船载雷达轴系误差修正参数的标定 被引量:4
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作者 李辉芬 戴正旭 向颉 《电讯技术》 北大核心 2018年第2期157-161,共5页
船载某C频段统一测控系统(UCB)因为光轴变化,使得坞内标定的角度零值、光机偏差等轴系误差修正参数不能准确校正设备的光轴指向偏差,而以光轴为基准放球标定的光电偏差修正参数无法使用。针对这个难题,在深入分析雷达轴系误差修正原理... 船载某C频段统一测控系统(UCB)因为光轴变化,使得坞内标定的角度零值、光机偏差等轴系误差修正参数不能准确校正设备的光轴指向偏差,而以光轴为基准放球标定的光电偏差修正参数无法使用。针对这个难题,在深入分析雷达轴系误差修正原理及参数标定方法的基础上,提出了基于测星数据动态标定雷达轴系误差参数、基于脉冲雷达电轴推算UCB光电偏差参数的替代方法,给出了相关数学模型,并利用实测数据进行了验算分析。试验结果表明,替代方法标定的参数准确合理,误差修正精度高,有效提升了数据处理精度。 展开更多
关键词 船载雷达 光电偏差 光机偏差 参数标定 轴系参数
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A Parallel Platform for Web Text Mining
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作者 Ping Lu Zhenjiang Dong +4 位作者 Shengmei Luo Lixia Liu Shanshan Guan Shengyu Liu Qingcai Chen 《ZTE Communications》 2013年第3期56-61,共6页
With user-generated content, anyone can De a content creator. This phenomenon has infinitely increased the amount of information circulated online, and it is beeoming harder to efficiently obtain required information.... With user-generated content, anyone can De a content creator. This phenomenon has infinitely increased the amount of information circulated online, and it is beeoming harder to efficiently obtain required information. In this paper, we describe how natural language processing and text mining can be parallelized using Hadoop and Message Passing Interface. We propose a parallel web text mining platform that processes massive amounts data quickly and efficiently. Our web knowledge service platform is designed to collect information about the IT and telecommunications industries from the web and process this in-formation using natural language processing and data-mining techniques. 展开更多
关键词 natural language processing text mining massive data paral-lel web knowledge service
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A General Architecture Model of CPDL Interpreter
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作者 徐福培 罗驰 金亚东 《Journal of Computer Science & Technology》 SCIE EI CSCD 1995年第5期463-469,共7页
This paper puts forward'a general architecture model of CPDL Interpreter,profiles the logical structure of the modules, and analyses the burden distri-bution among the interpreter units. The work has significance ... This paper puts forward'a general architecture model of CPDL Interpreter,profiles the logical structure of the modules, and analyses the burden distri-bution among the interpreter units. The work has significance in developing practical interpreter products. 展开更多
关键词 CPDL Interpreter KU FRU RPU DM Font Render paral-lelism BANDING hinting
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