终端区航空器的飞行密度和复杂度较高,此管制区域的处理能力是制约航空体系效率的瓶颈,对进场航空器管制效率进行量化研究,有助于提高管制工作处理能力和质量。首先,提出以区域导航(RNAV,regional area navigation)标准仪表进场程序的...终端区航空器的飞行密度和复杂度较高,此管制区域的处理能力是制约航空体系效率的瓶颈,对进场航空器管制效率进行量化研究,有助于提高管制工作处理能力和质量。首先,提出以区域导航(RNAV,regional area navigation)标准仪表进场程序的标称里程为计算基准量化进场管制效率,通过随机搜索聚类算法的结果得到航空器使用的RNAV标准仪表进场程序,选用在北京首都国际机场着陆的航空器为分析对象,计算航空器的进场管制效率,结合航迹讨论不同RNAV标准仪表进场程序下航空器的运行方式及特点。其次,对进场管制效率的影响因素进行分析,并采用灰色关联分析法量化各影响因素的影响程度与权重,结果显示:雷达引导度和航行三要素改变次数对进场管制效率具有显著影响,飞行流量和RNAV标准仪表进场程序的标称里程对进场管制效率的影响相对较小。继而,从影响因素角度出发评估整体进场管制效率,得到更为全面客观的整体进场管制效率。最后,尝试从RNAV进场程序路径以及优良管制行为模式两方面寻求进场管制效率的提升途径和方法。展开更多
To increase accuracy of navigation parameters,a perspective measuring complex with intellectual components is developed.Conception of synthesis optimal structure of the measuring complex is realized basing on a select...To increase accuracy of navigation parameters,a perspective measuring complex with intellectual components is developed.Conception of synthesis optimal structure of the measuring complex is realized basing on a selective method using principles of the functional systems.Selection of measured information is finished by original numeric criterion of observation level of state vector components.Prediction is realized by algorithm of self-organization that makes synthesis of the optimal complication.Therefore mechanism of self-regulation is realized and accuracy of the selective navigation complex is increased.展开更多
The technical progress and the globalization accelerate rapidly the development of new disciplines and sub-disciplines. Consequently, new and specific terminology is necessary. In addition, the interdisciplinarity con...The technical progress and the globalization accelerate rapidly the development of new disciplines and sub-disciplines. Consequently, new and specific terminology is necessary. In addition, the interdisciplinarity contributes as well to the development of communication problems between non-professionals and experts of a special domain or between experts of different domains--as well at international level. Usually, technical terms are defined differently according to their domains. Therefore, a new terminological approach will avoid semantic vagueness as synonymy, antonymy, risk of confusion, hypernymy-hyponymy relations and polysemy, homonymy, etc.. For example, the terms ＂localization＂ and ＂positioning＂ are prototypes for this semantic vagueness. The objective of the iglos （＂intelligent glossary＂） terminology work of the Institute of Traffic Safety and Automation Engineering of the Technische Universigit Braunschweig is to clarify the multilingual and multidisciplinary misunderstanding between special languages of different domains by standardizing the definitions of technical terms. The focus of this paper lies on semantic problems of English navigation terminology in railway traffic domain and the clarification of the semantic vagueness between its terms with a modeling process and a linguistic method with different criteria. Finally, the result of these approaches should be a consistent navigation terminology in the railway domain.展开更多
全球导航卫星系统(Global Navigation Satellite System,GNSS)时间传递技术以其低成本、高精度、广覆盖范围等特点,广泛应用到高精度时频领域。传统卫星共视技术利用全球卫星导航时间比对标准(Common GNSS Generic Time Transfer Standa...全球导航卫星系统(Global Navigation Satellite System,GNSS)时间传递技术以其低成本、高精度、广覆盖范围等特点,广泛应用到高精度时频领域。传统卫星共视技术利用全球卫星导航时间比对标准(Common GNSS Generic Time Transfer Standard,CGGTTS)共视文件实现事后高精度时间传递,很难实现实时时间传递。为满足数字换流站、电力物联网、移动通信等对实时、高精度时间传递的需求,研究了基于北斗三号全球卫星导航定位系统(BDS-3)伪距观测数据的实时卫星共视技术,开展了短基线和西安-三亚长基线北斗实时卫星共视时间传递实验来评估实时共视时间传递性能。实验结果表明北斗实时卫星共视时间传递精度优于1 ns,可为时频系统、数字换流站等应用领域提供纳秒级时间同步和纳秒级时间溯源服务。展开更多
文摘终端区航空器的飞行密度和复杂度较高,此管制区域的处理能力是制约航空体系效率的瓶颈,对进场航空器管制效率进行量化研究,有助于提高管制工作处理能力和质量。首先,提出以区域导航(RNAV,regional area navigation)标准仪表进场程序的标称里程为计算基准量化进场管制效率,通过随机搜索聚类算法的结果得到航空器使用的RNAV标准仪表进场程序,选用在北京首都国际机场着陆的航空器为分析对象,计算航空器的进场管制效率,结合航迹讨论不同RNAV标准仪表进场程序下航空器的运行方式及特点。其次,对进场管制效率的影响因素进行分析,并采用灰色关联分析法量化各影响因素的影响程度与权重,结果显示:雷达引导度和航行三要素改变次数对进场管制效率具有显著影响,飞行流量和RNAV标准仪表进场程序的标称里程对进场管制效率的影响相对较小。继而,从影响因素角度出发评估整体进场管制效率,得到更为全面客观的整体进场管制效率。最后,尝试从RNAV进场程序路径以及优良管制行为模式两方面寻求进场管制效率的提升途径和方法。
文摘To increase accuracy of navigation parameters,a perspective measuring complex with intellectual components is developed.Conception of synthesis optimal structure of the measuring complex is realized basing on a selective method using principles of the functional systems.Selection of measured information is finished by original numeric criterion of observation level of state vector components.Prediction is realized by algorithm of self-organization that makes synthesis of the optimal complication.Therefore mechanism of self-regulation is realized and accuracy of the selective navigation complex is increased.
文摘The technical progress and the globalization accelerate rapidly the development of new disciplines and sub-disciplines. Consequently, new and specific terminology is necessary. In addition, the interdisciplinarity contributes as well to the development of communication problems between non-professionals and experts of a special domain or between experts of different domains--as well at international level. Usually, technical terms are defined differently according to their domains. Therefore, a new terminological approach will avoid semantic vagueness as synonymy, antonymy, risk of confusion, hypernymy-hyponymy relations and polysemy, homonymy, etc.. For example, the terms ＂localization＂ and ＂positioning＂ are prototypes for this semantic vagueness. The objective of the iglos （＂intelligent glossary＂） terminology work of the Institute of Traffic Safety and Automation Engineering of the Technische Universigit Braunschweig is to clarify the multilingual and multidisciplinary misunderstanding between special languages of different domains by standardizing the definitions of technical terms. The focus of this paper lies on semantic problems of English navigation terminology in railway traffic domain and the clarification of the semantic vagueness between its terms with a modeling process and a linguistic method with different criteria. Finally, the result of these approaches should be a consistent navigation terminology in the railway domain.
文摘全球导航卫星系统(Global Navigation Satellite System,GNSS)时间传递技术以其低成本、高精度、广覆盖范围等特点,广泛应用到高精度时频领域。传统卫星共视技术利用全球卫星导航时间比对标准(Common GNSS Generic Time Transfer Standard,CGGTTS)共视文件实现事后高精度时间传递,很难实现实时时间传递。为满足数字换流站、电力物联网、移动通信等对实时、高精度时间传递的需求,研究了基于北斗三号全球卫星导航定位系统(BDS-3)伪距观测数据的实时卫星共视技术,开展了短基线和西安-三亚长基线北斗实时卫星共视时间传递实验来评估实时共视时间传递性能。实验结果表明北斗实时卫星共视时间传递精度优于1 ns,可为时频系统、数字换流站等应用领域提供纳秒级时间同步和纳秒级时间溯源服务。
