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机场目标可见性性能建模与分析
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作者 王志巍 《实验室研究与探索》 CAS 北大核心 2023年第9期78-82,145,共6页
机场场面目标的可见性是塔台管制员监视和指挥机场场面活动的基础,是机场塔台选址和建设的首要参考指标。在描述机场目标可见性基础上,明确可见性概念,提出目标可见性评估过程;借鉴光电成像技术,建立机场目标可见性模型,包括目标鉴别方... 机场场面目标的可见性是塔台管制员监视和指挥机场场面活动的基础,是机场塔台选址和建设的首要参考指标。在描述机场目标可见性基础上,明确可见性概念,提出目标可见性评估过程;借鉴光电成像技术,建立机场目标可见性模型,包括目标鉴别方法、目标任务性能、人眼对比度阈值函数、大气调制传递函数等。以国内某新建机场为例,对提出的数学模型进行了仿真计算,并以此为基础设计了机场现场目标可见性测验方法,由15名管制员进行测验。结果证明,测验与模型仿真在目标可见性趋势上是一致的。表明仿真模型具有一定的参考意义,可作为机场目标可见性的定性参考。 展开更多
关键词 机场 塔台选址 目标可见性 光电成像
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MFV-Class: a multi-faceted visualization tool of object classes
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作者 张志猛 潘云鹤 庄越挺 《Journal of Zhejiang University Science》 EI CSCD 2004年第11期1374-1381,共8页
Classes are key software components in an object-oriented software system. In many industrial OO software systems, there are some classes that have complicated structure and relationships. So in the processes of softw... Classes are key software components in an object-oriented software system. In many industrial OO software systems, there are some classes that have complicated structure and relationships. So in the processes of software maintenance, testing, software reengineering, software reuse and software restructure, it is a challenge for software engineers to understand these classes thoroughly. This paper proposes a class comprehension model based on constructivist learning theory, and implements a software visualization tool (MFV-Class) to help in the comprehension of a class. The tool provides multiple views of class to uncover manifold facets of class contents. It enables visualizing three object-oriented metrics of classes to help users focus on the understanding process. A case study was conducted to evaluate our approach and the toolkit. 展开更多
关键词 Program comprehension Reverse engineering Software visualization Object-oriented software metrics Program analysis
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