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第三届中国卫星导航学术年会

作者： HAN Tao1 2 LU Xiaochun1 2 ZOU Decai1 2 1.national time service center Xi’an 710600 P.R.China 2.Key Laboratory of Precision Navigation and Timing Technology Chinese Academy of Sciences Xi’an 710600 P.R.China

With the "Regulations of the School Bus Safety（draft）" issued by the State Council at the end of 2011,the management of school bus safety transportation has become a hot *** article puts forward a method of using Global Navigation Satellite System（GNSS）to monitor the school bus *** school bus transport and management system,which is real-time,accurate and efficient,will be built up by integrate satellite positioning technology,information technology,data transmission technology,electronic sensor technology,information processing technology and emergency services ***,the difference between the school bus monitoring and general vehicle monitoring is pointed ***,we find out the main reason is overload of passengers which cause the phenomenon of frequent school bus accident in ***,a School Bus Overloading Monitoring System（School-Bus-OMS）is designed to prevent the phenomenon of overload of *** that,the school bus safety monitoring system which based on GNSS and School-Bus-OMS is ***,a detailed description on the structure,function and rescuing measures of this system are given,and the corresponding mathematical models are established.

关键词： School Bus Safety GNSS Pressure Monitoring Mathematical Modeling

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基于灰色模型和ARIMA模型的钟差预测

宇航计测技术 2012年第1期32卷 26-29页

作者：宋会杰侯娟中国科学院国家授时中心西安710600 中国科学院时间频率基准重点实验室西安710600

由于多种因素的影响,原子钟运行情况十分复杂,为了有效地进行钟差预报和更好的反应原子钟的特性,提出一种基于灰色模型和ARIMA模型的组合模型来实现钟差的预报,并给出了灰色模型和ARIMA模型进行原子钟钟差预报的基本思想和预报模型。利... 详细信息

由于多种因素的影响,原子钟运行情况十分复杂,为了有效地进行钟差预报和更好的反应原子钟的特性,提出一种基于灰色模型和ARIMA模型的组合模型来实现钟差的预报,并给出了灰色模型和ARIMA模型进行原子钟钟差预报的基本思想和预报模型。利用组合模型更精确地把握钟差序列复杂细致的变化规律,从而更好的逼近钟差序列。为了验证该组合模型的可行性和有效性,利用原子钟钟差数据进行钟差预报分析,结果显示该模型具有较好的预报精度。

关键词：灰色模型 ARIMA 钟差预报

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用于GNSS基带信号分析的相干累加算法

数据采集与处理 2009年第B10期24卷 124-127页

作者：贺成艳卢晓春中国科学院国家授时中心西安710600 中国科学院精密导航定位与定时重点实验室西安710600 中国科学院研究生院北京100190

在对一般累加平均算法的原理、应用条件和误差来源等进行分析的基础上,提出了一种可以适用于更高数据速率(如500 bps)的相干累加算法,并且不需要进行导航信息的剥离。通过实验分析表明,在经过一定周期累加以后,就可以在时域观测到清晰... 详细信息

在对一般累加平均算法的原理、应用条件和误差来源等进行分析的基础上,提出了一种可以适用于更高数据速率(如500 bps)的相干累加算法,并且不需要进行导航信息的剥离。通过实验分析表明,在经过一定周期累加以后,就可以在时域观测到清晰的扩频码波形,也证明了新的累加平均算法确实可以达到提高信噪比的目的,而且比一般方法要好。

关键词：相干累加基带信号 GNSS 信噪比

A virtual reference satellite differential method for relative correction of satellite ephemeris errors

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Science China(Physics,Mechanics & Astronomy) 2010年第12期53卷 2300-2306页

作者： CAI ChengLin 1,3 , LI XiaoHui 2,3 & WU HaiTao 2,3 1 Gulin University of Electronic Technology, 541004, China 2 national time service center, Chinese Academy of Sciences, Lintong 710600, China 3 Key Laboratory of Precision Navigation and Timing Technology, national time service center, Chinese Academy of Sciences, Lintong 710600, China Gulin University of Electronic Technology Gulin China Chinese Academy of Sciences Key Laboratory of Precision Navigation and Timing Technology National Time Service Center Lintong China (GRID:grid.9227.e) (ISNI:***) Chinese Academy of Sciences National Time Service Center Lintong China (GRID:grid.9227.e) (ISNI:***) Chinese Academy of Sciences Key Laboratory of Precision Navigation and Timing Technology National Time Service Center Lintong China (GRID:grid.9227.e) (ISNI:***)

In order to solve the problems that the novel wide area differential method on the satellite clock and ephemeris relative correction (CERC) in the non-geostationary orbit satellite constellation, a virtual reference satellite (VRS) differential principle using relative correction of satellite ephemeris errors is proposed. It is referred to be as the VRS differential principle, and the elaboration is focused on the construction of pseudo-range errors of VRS. Through qualitative analysis, it can be found that the impact of the satellite’s clock and ephemeris errors on positioning can basically be removed and the users’ positioning errors are near zero. Through simulation analysis of the differential performance, it is verified that the differential method is universal in all kinds of satellite navigation systems with geostationary orbit (GEO) constellation, Medium orbit (MEO) constellation or hybrid orbit constellation, and it has insensitivity to abnormal aspects of a satellite ephemeris and clock. Moreover, the real time positioning accuracy of differential users can be maintained within several decimeters after the pseudo-range measurement noise is effectively weakened or eliminated.

关键词： wide area differential method virtual reference satellite (VRS) satellite ephemeris errors satellite clock errors constellation

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电磁实时追踪系统质控实践指南

中华放射肿瘤学杂志 2024年第2期33卷 93-102页

作者：国家癌症中心/国家肿瘤质控中心何侠不详江苏省肿瘤医院/江苏省肿瘤防治研究所/南京医科大学附属肿瘤医院放疗科南京210009

个体化、精准化放射治疗时代对肿瘤运动管理提出了更高的要求,电磁实时追踪系统即为有代表性的肿瘤运动管理技术。该技术涉及的人员、流程较多,质量控制也不同于一般的放射治疗质控实践,因此制定了本质控实践指南。本指南为开展电磁实... 详细信息

个体化、精准化放射治疗时代对肿瘤运动管理提出了更高的要求,电磁实时追踪系统即为有代表性的肿瘤运动管理技术。该技术涉及的人员、流程较多,质量控制也不同于一般的放射治疗质控实践,因此制定了本质控实践指南。本指南为开展电磁实时追踪系统的机构提供组织、人员、设备、技术流程及文档记录等方面的质量控制标准,内容涵盖系统介绍、适应证选择及患者宣教、信标转发器植入流程及质控、日检、月检和文档记录。基于本指南,可以满足电磁实时追踪系统质控实践的各项标准要求。

关键词：放射疗法电磁实时追踪运动管理立体定向放射疗法质量控制

基于EPID和MLC运行日志文件的调强放疗在线剂量验证实践指南

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中华放射肿瘤学杂志 2024年第1期33卷 1-6页

作者：国家癌症中心/国家肿瘤质控中心倪千喜不详湖南省肿瘤医院/中南大学湘雅医学院附属肿瘤医院放疗科长沙410013

在线剂量验证是确保个体化精确调强放疗得以安全有效实施的重要环节。基于模体测量的剂量验证方法一般在患者首次治疗前予以实施。该方法不能对患者所有分次治疗时的计划执行状态进行监测和评价。利用加速器运行过程中电子射野影像装置(... 详细信息

在线剂量验证是确保个体化精确调强放疗得以安全有效实施的重要环节。基于模体测量的剂量验证方法一般在患者首次治疗前予以实施。该方法不能对患者所有分次治疗时的计划执行状态进行监测和评价。利用加速器运行过程中电子射野影像装置(EPID)或者生成的多叶准直器(MLC)运行日志(log)文件获取放疗计划执行过程中的各种参数进行治疗中的患者剂量验证,可对患者所有分次治疗时的计划执行状态进行监测和评价。本指南系统介绍在线剂量验证方式的原理、方法、步骤、技术要求、结果分析与评价等内容。给采用基于EPID与MLC运行日志文件进行在线放疗剂量验证的单位及个人提供参考的指南依据,以便正确、合理使用该剂量验证方法,提升调强放疗剂量验证的效率和覆盖面,确保治疗安全和准确。

关键词：放射疗法,调强在线剂量验证 γ通过率日志文件电子射野影像装置

“快乐童年”品牌:点亮乡村儿童心灵成长之光

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社会与公益 2024年第7期 33-35页

作者： Shandong Provincial Social Organization service center 山东省社会组织服务中心

在当今社会,儿童的心理健康和生理健康成长日益受到社会各界的广泛关注。作为致力于乡村振兴的重要一环,“快乐童年”公益品牌应运而生,由山东省乡村振兴基金会倾力打造,旨在通过美育培育志愿服务,为乡村儿童提供一个充满爱与希望的成... 详细信息

在当今社会,儿童的心理健康和生理健康成长日益受到社会各界的广泛关注。作为致力于乡村振兴的重要一环,“快乐童年”公益品牌应运而生,由山东省乡村振兴基金会倾力打造,旨在通过美育培育志愿服务,为乡村儿童提供一个充满爱与希望的成长环境。该品牌不仅聚焦于儿童的艺术素养提升,更关注他们心灵世界的滋养和身体健康的促进,以“为小”为服务宗旨,致力于满足乡村儿童多样化的成长需求。

关键词：乡村振兴乡村儿童生理健康心灵成长志愿服务成长需求心理健康素养提升

A study on volunteer augmentation navigation technology

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Science China(Physics,Mechanics & Astronomy) 2011年第6期54卷 1029-1034页

作者： WU HaiTao 1,2,LU XiaoChun 1,2,ZOU DeCai 1,2 & HAN Tao 1,2 1.national time service center,Chinese Academy of Sciences,Xi’an 710600,China 2 Key Laboratory of Precision Navigation and Timing Technology,Chinese Academy of Sciences,Xi’an 710600,China Chinese Academy of Sciences National Time Service Center Xi’an China (GRID:grid.9227.e) (ISNI:***) Chinese Academy of Sciences Key Laboratory of Precision Navigation and Timing Technology Xi’an China (GRID:grid.9227.e) (ISNI:***)

Navigation augmentation technology is one of the most common methods to increase the continuity,reliability and integrity of the global satellite navigation *** concept of volunteer augmentation navigation (VNA) is proposed and the elements and topological structure of VNA are also analyzed in this *** study focuses on the neural network model that volunteers and ordinary users use modern communication information network to exchange self-organizing *** neural cell model of Volunteer Augmentation Navigation using shared information is *** interactive general relative positioning is *** basic theories and methods of volunteer augmentation navigation are formed on the basis of the above-mentioned *** study of realization mechanism of volunteer augmentation technology helps to form a relatively integral architecture of volunteer augmentation navigation.A user self-service satellite navigation augmentation which combines information exchange and navigation services may strengthen the continuity,reliability and integrity of the navigation *** volunteer augmentation navigation theory proposed in this paper improves the traditional satellite navigation application model and expands the connotation and denotation of satellite navigation augmentation methods.

关键词： volunteer augmentation navigation self-organizing information exchange interactive general relative positioning

Astronomical function and date of the Taosi observatory

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Science China(Physics,Mechanics & Astronomy) 2009年第1期52卷 151-158页

作者： WU JiaBi1, CHEN MeiDong2 & LIU CiYuan3 1.national Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, China 2 Institute for the History of Natural Science, Chinese Academy of Sciences, Beijing 100010, China 3 national time service center, Chinese Academy of Sciences, Xi’an 710600, China national Astronomical Observatories Chinese Academy of Sciences Beijing China Institute for the History of Natural Science Chinese Academy of Sciences Beijing China national time service center Chinese Academy of Sciences Xi’an China

The Taosi site in Xiangfen County,Shanxi Province,may be the capital of the King Yao. Archeologists recently discovered a large semi-circular stamped-earth platform, II FJT1,which has a clear and definite pounded-earth central core together with a curved wall perforated by twelve gaps. The platform is said to be an ancient observatory used to determine the seasons by watching the sunrise. Each feature of II FJT1 was precisely measured and the data are reproduced in this paper. An astronomical analysis of slots E2 and E12 was carried out using the azimuths of the slots' centerlines and the vertical angle of the mountain ridge opposite, above which the sun rises. The results show that at present the sun is close to the two slots but does not exactly enter them at summer and winter solstice sunrise. Using 14C analysis archeologists dated the site to about 2100 BC. Because of the secular change in the obliquity of the ecliptic,at that date on the summer solstice the half-risen sun would have appeared inside slot E12 just to the right of the centerline,and on the winter solstice the sun would have been exactly on the centerline of slot E2. This result provides compelling proof that II FJT1 is an ancient observatory.

关键词： astro-archeology astro-chronology Taosi culture ancient observatory time service