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第三届中国卫星导航学术年会

作者： Su Zhe*, Zhang Lixin, Qian Xiaoping, Xu Qibing, Li Yisong china Academy of space {2. (Xi’an), Xi’an 710100, china

The bispectra based pulsar integrated pulse profile recognition algo- rithm performs poorly when the pulsar signal received by spacecraft is distorted by Doppler effect. In order to improve the recognition rate, this paper proposes a novel pulsar integrated pulse profile recognition algorithm based on the bispectra-mellin （BM） transform. By combining bispectra and mellin transform together, the BM transform is independent of both translation and scale changes, and robust to Gaussian noise, which is especially suitable for pulsar signal recognition in X-ray pulsar deep space {2. system. Several experiments dealing with different pulsars have been carried out to illustrate the applicability of this algorithm, even when the signal is Doppler-distorted.

关键词： pulsar bispectra Mellin transform low-pass filtering property Doppler

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Application of Pressure Sensor in Chinese Area positioning System

Application of Pressure Sensor in Chinese Area Positioning S...

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第三届中国卫星导航学术年会

作者： Lirong Zhang 1* , Lihua Ma 1 , Xiaolan Wang 1,2., Haifu Ji 1, 2., Zhengqun Hu 1 1 National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012. china 2.Graduate University of Chinese Academy of Sciences, Beijing 100049, china

In the proof-of-concept phase of Chinese Area positioning System （CAPS）, the user receiver can calculate local altitude and further achieve three-dimensional positioning by pressure sensor which can be used to measure atmospheric pressure and temperature. Additionally, the meteorological parameters, such as atmospheric pressure, temperature and humidity, can be resorted to analyze tropospheric delay from the satellite to the user. In this work, the MS5534C barometer module is applied in CAPS. The results show that positioning and navigation with a high performance can be achieved, which can well satisfy the requirements of the common users.

关键词： Chinese Area positioning System pressure sensor altimeter troposphere effect

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自主式移动机器人分布视觉组合导航多摄像机标定方法

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吉林大学学报（工学版） 2006年第3期36卷 387-392页

作者：卢韶芳刘大维陈秉聪吉林大学通信工程学院长春130022 青岛大学车辆与交通工程研究中心山东青岛266071 吉林大学生物与农业工程学院长春130022

根据分布视觉组合导航系统利用全局视觉对移动机器人进行绝对定位的要求,针对机器人远离摄像机时定位精度明显下降的问题,提出了适用于较大场景的多摄像机参数分区标定方法。在集合的概念下描述了移动机器人的整个工作区域与各个摄像机... 详细信息

根据分布视觉组合导航系统利用全局视觉对移动机器人进行绝对定位的要求,针对机器人远离摄像机时定位精度明显下降的问题,提出了适用于较大场景的多摄像机参数分区标定方法。在集合的概念下描述了移动机器人的整个工作区域与各个摄像机的有效区域的关系,建立了基于小孔模型的空间平面到摄像机像平面的透视变换矩阵的摄像机参数标定模型。通过4部摄像机在长9.6 m,宽6.4 m的区域内进行的标定实验和误差分析表明,该方法的整体平均误差仅为7.96 mm。

关键词：自动控制技术移动机器人导航摄像机标定

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RSSI System based on Differential Barometric Altimetry:Research and Analysis

RSSI System based on Differential Barometric Altimetry:Resea...

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第三届中国卫星导航学术年会

作者： Zhengqun Hu 1* , Lirong Zhang 1 , Huli Shi 1,2., Jun Pei 1 , Xiaolan Wang 1,2.1 National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012. china 2.Graduate University of Chinese Academy of Sciences, Beijing 100049, china

In indoor positioning systems, there are a large number of objects blocking and signal interference, the multipath effect is serious, indoor environments are complicated, for the increasing demand to navigation and positioning technology today, it will be concern of indoor positioning technology to us. This paper analyzes the features of indoor navigation signals and the design of a number of typical systems with the characteristics of wireless transmission, it focuses on the distributed navigation signal strength to realize indoor positioning, to solve the complexity of the signal for navigation, this paper uses the node-type distribution of signal intensity differences in the communication process to estimate the unknown location coordinates and the position resolution. Indoor positioning technology based on RSSI in the resolution of the elevation is not very satisfactory, the differential barometric altimetry is introduced in the this paper and datum mark is applied to correct the measurement point of user in order to obtain the absolute height of user, this method overcomes the altimeter error caused by atmosphere erratic changes with time, thereby it improves the positioning accuracy of the user height. A good complementary effect will be formed for the general elevation position system.

关键词： indoor positioning signal strength signal difference differential barometric altimetry

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导航系统在治疗股骨头坏死髓芯减压术中的开发与验证

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上海交通大学学报 2008年第12期42卷 1962-1965页

作者：李智攀张建国王成焘刘志宏杨庆铭上海交通大学机械与动力工程学院上海200240 上海交通大学医学院附属瑞金医院骨科上海200025

针对治疗股骨头坏死髓芯减压术中要求手术切口小且只暴露出大转子部位的问题,设计了一种基于点和面特征相结合的方法.该方法将配准过程分为两步实现,即点对点配准和ICP配准,提高了配准精度.在基于VTK平台环境下,开发了手术导航软件,并... 详细信息

针对治疗股骨头坏死髓芯减压术中要求手术切口小且只暴露出大转子部位的问题,设计了一种基于点和面特征相结合的方法.该方法将配准过程分为两步实现,即点对点配准和ICP配准,提高了配准精度.在基于VTK平台环境下,开发了手术导航软件,并使用一根股骨进行了模型实验.结果表明,目标配准误差为2.137 mm,能够满足手术对精度的要求.

关键词：手术导航光学定位系统三维重建股骨头坏死髓芯减压术配准

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Assessing CBOC Signal Quality using Scatterplot

Assessing CBOC Signal Quality using Scatterplot

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第三届中国卫星导航学术年会

作者： GUO Yuanyuan, WANG Gang china Academy of space {2.(Xi’an) NO.150 Weiqu West Street, Chang’an District, Xi’an, Shaanxi, 710100, china

The Interplex modulation is particularly suitable for satellite navigation system. But the constant envelope of the signal will be destroyed by the limited bandwidth of navigation system, then distorted by the non-linearity of HPA and filtering of post HPA filter, in the end introducing range error. This paper introduces the simulation model of the navigation satellite transmission channel. By simulation in MATLAB, we assess the impact of transmission channel on CBOC Interplex and CBOC signal adopting the evaluation methods and parameters of scatterplot. The so-called CBOC scatterplot is obtained with the data channel as I component and the pilot channel as Q component, and then compared with the CBOC Interplex scatterplot. We can describe the quality and distribution of CBOC signal directly using this technique.

关键词： constant envelope scatterplot CBOC signal

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IONOSPHERIC EFFECTS ON GPS navigation IN LOW-LATITUDE AREA

IONOSPHERIC EFFECTS ON GPS NAVIGATION IN LOW-LATITUDE AREA

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第一届交通运输工程国际学术会议

作者： GAO Shan1, 2.and CHEN Wu2.1School of Civil Engineering, Southwest Jiaotong University, Chengdu, Sichuan, china, 610031 2.ept. of Land Surveying and Geo-Informatics, The Hong Kong Polytechnic University, Hong Kong

Ionospheric effects are the major constraints for GPS navigation. Especially, at low latitude, ionospheric delay varies greatly both in space and time. Even for short baselines, ionospheric effects cannot be cancelled out with double difference algorithm. Strong ionospheric disturbances are also observed in the region. In this paper, ionospheric behavior in Hong Kong is investigated by using a dense reference network. The effects of ionospheric disturbances on GPS receiver, such as loss of lock, gross error and measurement noise are studied.

关键词： GPS navigation ionospheric delay loss of lock cycle slip

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Study on Pseudorange Consistency for RDSS/RNSS Joint Simulation

Study on Pseudorange Consistency for RDSS/RNSS Joint Simulat...

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第三届中国卫星导航学术年会

作者： Jianwei Zhan, Haibo Tong, Hai Sha, Guozhu Zhang, Gang Ou Satellite navigation Research and Development Center, National University of Defense technology, Changsha, {2.

As the satellite navigation system BD-2.comes to be more and more sophisticated, the RDSS/RNSS dual-mode user receiver covering two work modes of RDSS and RNSS are developing rapidly. It is demanded to simulate the satellite signals in different conditions to test the behaviors of the dual-mode user receiver. RDSS is an active positioning system. Otherwise, RNSS is a passive positioning system, without transmitting signals. The key point in developing a RDSS/RNSS dual-mode signal simulator is how to guarantee the synchronization of these two different kinds of systems. A signal simulation method adapted to RDSS and RNSS is proposed here;the formulae for the Doppler frequency shift are derived, which have solved the pseudorange consistency problem of RDSS and RNSS signal in the same GEO. The experiment results validate the algorithms developed here. The results in practical use show that the RDSS/RNSS dual-mode signal simulator developed here is meeting all the test requirements.

关键词： RDSS multi-mode simulation ephemeris GEO Doppler frequency shift simulator

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The effects of promethazine on the analgesia,hypnosis,amnesia and therapeutic index of isoflurane treated mice

The effects of promethazine on the analgesia,hypnosis,amnesi...

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全国第一次麻醉药理学术会议暨中国药理学会麻醉药理专业委员会筹备会

作者： Su-pei Song~1 Liu-qing Hu~1 Ti-jun Dai~2.(1.Institute of Anesthesiology,2.Jiangsu Province Key laboratory of Anesthesiology,Xuzhou Medical College,Xuzhou,PRchina)

The present study was designed to investigate the effects of promethazine on the analgesia, hypnosis,amnesia and therapeutic index of *** study promethazine on the analgesic effect of isoflurane with hot-plate test and writhing *** studying the effect of promethazine on the sleeping time of isoflurane,we use the righting reflex *** established the mouse model of the effect of promethazine on the amnesia of isoflurane by Morris water *** method provided the statistics for the ED、LD in *** result of hot-plate test and writhing test indicated that promethazine could enhance the analgesic effect of isoflurane(Pspace exploration tests and directional navigation tests(P0.05).These results suggested that Promethazine could not only reinforce the effect of isoflurance on analgesia、hypnosis and amnesia,but also boost the therapeutic index of isoflurance.

关键词： Promethazine Isoflurane Analgesia Hypnosis Amnesia Therapeutic index Anesthesia

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自适应TSKF的空间电推进机动目标跟踪

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哈尔滨工业大学学报 2018年第4期50卷 36-40页

作者：任家栋曾庆双朱虹哈尔滨工业大学航天学院哈尔滨150001 空间智能控制技术上海市重点实验室(上海航天控制技术研究所) 上海201109

非合作机动目标跟踪是地球静止轨道卫星进行状态监测、维修维护等复杂航天任务的前提.出于推进效率考虑,下一代高轨卫星将优选全电推进配置,但电推进的连续小推力机动特性致使基于CW方程的经典非合作目标跟踪算法期望有偏,两段状态估计... 详细信息

非合作机动目标跟踪是地球静止轨道卫星进行状态监测、维修维护等复杂航天任务的前提.出于推进效率考虑,下一代高轨卫星将优选全电推进配置,但电推进的连续小推力机动特性致使基于CW方程的经典非合作目标跟踪算法期望有偏,两段状态估计法在稳态估计性能与机动跟踪响应间存在矛盾.为了解决电推进下对机动目标的快速跟踪估计问题,采用滤波误差理论对经典算法性能衰减因素进行分析,得到机动加速度至滤波新息的转移矩阵演变特性,进而提出一种自适应变维两段状态估计法.改进方法基于目标机动检测信息修正偏差滤波器的观测阵以匹配上述演变特性,使其在目标非机动区间性能与经典相对导航跟踪算法等效,在机动区间性能与两段状态估计算法等效,同时具备更快的跟踪响应特性.仿真结果表明,本算法对非合作目标的稳态跟踪性能与传统经典算法一致,跟踪响应速度提升4~5倍,是对空间非合作机动目标连续小推力机动下跟踪问题的有益探索.

关键词：地球静止轨道电推进两段状态估计自适应机动目标

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