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Research on Grouping Management and Control Model of Constellation in Global Navigation System

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Research on Grouping Management and Control Model of Constel...

第三届中国卫星导航学术年会

作者： XianqingYi 1 *, QiangwenYang 2., Kai Yu 1 , ShuTang 1 , YaohongZhang 1 , and XueShaLuo 1 1 science and technology on {2. Systems Engineering laboratory, School 5, national University of Defense technology, Changsha, china 2.6} Satellite Navigation Engineering center, Beijing, china

In order to realize flexible configuration, high transmission, integrated management, structure invulnerability and convenient expand of constellation in COMPASS, model of grouping management and control is presented in this paper. Based on this model of grouping management, the master station is taken as the manager of a group, and the satellite that have the best connection relation with to the manager is taken as the header of a group, the other satellites are taken as group members in COMPASS system. This best connection relation is integration of many factors such as the short link distance, the long connection time, the base connection obliquity etc. Firstly, the topology and its evolvement of constellation of COMPASS system are analyzed. Then the model of grouping management and control is defined and the process of grouping management and control is analyzed. Finally, the predominance of grouping management and control during the construct, run and upgrade of COMPASS system is analyzed and summarized, and the construct advices about COMPASS system are given.

关键词： Constellation Grouping Mode Management and Control Grouping Predominance

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大数据与量子计算

science Bulletin 2015年第Z1期 499-508页

作者：王书浩龙桂鲁清华大学物理系低维量子物理国家重点实验室量子物质科学协同创新中心清华大学信息科学技术国家实验室(筹)

大数据技术的迅猛发展对计算效率提出了更高的要求.由于量子系统的独特性质,量子计算具有经典计算不具有的量子超并行计算能力,能够对某些重要的经典算法进行加速.人们发现,除了大数分解算法,量子计算的更多用途是对量子体系的仿真计算... 详细信息

大数据技术的迅猛发展对计算效率提出了更高的要求.由于量子系统的独特性质,量子计算具有经典计算不具有的量子超并行计算能力,能够对某些重要的经典算法进行加速.人们发现,除了大数分解算法,量子计算的更多用途是对量子体系的仿真计算和在数据分析领域的应用.近年来,大数据和量子计算开始融合.虽然实际使用的量子计算机尚未建成,量子计算在大数据的应用在理论上已经取得了一些重要的进展.实验上也有了一些发展.本文首先介绍量子计算的基本原理和Grover量子算法.随后以量子机器学习作为切入点,介绍了量子计算在数据挖掘领域的应用.

关键词：大数据量子计算量子机器学习量子信息处理

Shadow Suppression Based on Adaptive Gaussian Mixture Model

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Shadow Suppression Based on Adaptive Gaussian Mixture Model

2.12.national Conference on information {2. and Computer science

作者： Yun Liu Institute of information Qingdao University of science & {2. Qingdao china Wen Zhao Institute of information Qingdao University of science & {2. Qingdao china

According to the HSV color space characteristics,changes the modeling space in the process of Gaussian mixture model,based on the setting of each component,deals with shadow casted by using the Gaussian mixture model algorithm detecting the moving *** operators are used to compensate edge detail information and to remove the ***,using the similarity of gray density,texture value and the gradient value,a good result can be *** experimental result showed that this method can effectively solve the shadow and have good real-time performance and robustness.

关键词： HSV color space Gaussian mixture model morphological shadow image gradient

A Novel Grouping Aggregation Algorithm for Online Analytical Processing

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A Novel Grouping Aggregation Algorithm for Online Analytical...

2.12.national Conference on information {2. and Computer science

作者： WEI CHEN 1,2.1) College of information science and Engineering,Yanshan University,Qinhuangdao,{2. 2. The Key laboratory for Computer Virtual technology and System Integration of HeBei Province,Qinhuangdao,{2. YONGSHAN LIU 1,2.1) College of information science and Engineering,Yanshan University,Qinhuangdao,{2. 2. The Key laboratory for Computer Virtual technology and System Integration of HeBei Province,Qinhuangdao,{2. NING WANG 1,2.1) College of information science and Engineering,Yanshan University,Qinhuangdao,{2. 2. The Key laboratory for Computer Virtual technology and System Integration of HeBei Province,Qinhuangdao,{2.

As regard to improve the efficiency of grouping aggregation calculation,the data is compressed by using binary encoding,and the dimension hierarchical grouping attribute set encodings of each dimension table are calculated by using the dimension hierarchy *** different encodings are put into temporary table to be sorted and grouped,and the grouping sequence numbers of fact table records which satisfy the query conditions are ***,the buffer is located by the grouping sequence number and the grouping aggregation calculation is *** analysis and experimental results show that the proposed algorithm can significantly improve the efficiency of grouping aggregation calculation.

关键词： OLAP grouping aggregation sequence number

Photorefractive Effect in a CdS Nanoparticlessensitized Polymer Composite

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Journal of Wuhan University of technology(Materials science) 2007年第4期22卷 638-642页

作者：丁莉芸姜德生 Key laboratory of Fiber Optic Sensing technology and {2. Processing(Ministry of Education) Wuhan University of Technology

The photorefractive （PR） performance of an organic/inorganic hybrid polymer composite sensitized by CdS nanoparticles, combining poly（N-vinylcarbazole）（PVK）, the second-order optically nonlinear chromophore 1-n-butoxy-2.methyl-（4-p-nitropheylazo）benzene （BMNPAB） and 9-ethylcarbazole （ECZ） was studied. It was confirmed that the CdS colloidal particles had a nanoscale size and quantum confinement effect adopting transmission electron microscopy and UV-Vis absorption spectroscopy. The addition of CdS nanoparticles as a photosensitizer in PVK will be significant enhancement of photoconductivity because of the high photocharge generation quantum efficiency and high charge transport to conducting polymer. The polymer composite film exhibited PR effect with a method of two-beam coupling experiment. And an asymmetric two. beam coupling gain of 45.8 cm^-1 without applied electric filed is obtained at 632.8 nm wavelength.

关键词： photorefi-active polymer PVK/CdS nanocomposite photoconductivity two-beam coupling

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Efficient generation of two-dimensional cluster states in a cavity QED

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Chinese Physics B 2013年第4期22卷 124-127页

作者：张刚周建薛正远 Machinery and Electronics Engineering Institute West Anhui University Anhui Xinhua University laboratory of quantum {2. technology and School of Physics and Telecommunication Engineering South China Normal University

We propose a scheme to achieve a kind of nontrivial multipartite pair-wise controlled phase operation in a cavity QED setup. The operation implemented is of geometrical nature and is not sensitive to the thermal state of the cavity. In particular, we have managed to avoid the conventional dispersive coupling so that high speed gate operation is achieved which is very important in view of decoherence. We show that this multipartite pair-wise controlled phase operation makes the generation of two-dimensional cluster states very efficient.

关键词： controlled phase gate cluster state cavity QED

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Conditions on converting coherence into entanglement

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Chinese Physics B 2017年第8期26卷 46-49页

作者：杨连武夏云杰 Shandong Provincial Key laboratory of Laser Polarization and information {2. Department of PhysicsQufu Normal University Department of Physics and information Engineering Jining University

The present studies show that any nonzero amount of coherence of a system can be converted into entanglement between the system and an incoherent ancillary system via incoherent operations. According to this conclusion, we study the process of converting coherence into entanglement via a unitary operation where the initial ancillary system is of different quantum state. We find that some other conditions should be satisfied in converting coherence into entanglement. We also study the conditions of coherence consumption of converting coherence into entanglement.

关键词： coherence entanglement conditions

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The Analysis of Two-level quantum System States and Control in the Bloch Ball

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The Analysis of Two-level Quantum System States and Control ...

第二十七届中国控制会议

作者： Cong Shuang Department of Automation,University of science and technology of{2.,Key laboratory of quantum information,Chinese Academy of sciences,Hefei 2.002.,P.R.china

The Bloch vector,or vector of coherence,provides a geometric description of the state and density matrix of two-state quantum ***,the Bloch vector may be viewed as the adjoint representation of an su（2. object in an so（3） *** pure and mixed states details concerning the geometry of the Bloch ball for a qubit are investigated. The system controls with two and three magnetic fields to closed and open system are analyzed in the Bloch ball.

关键词： Pure state Density matrix The Bloch sphere The Bloch ball quantum system control

Efficient DPCA SAR imaging with fast iterative spectrum reconstruction method

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science china({2. sciences) 2012年第8期55卷 1838-1851页

作者： FANG Jian1,ZENG JinShan1,XU ZongBen1&ZHAO Yao2.1M inistry of Education Key Lab for Intelligent Networks and Network Security Xi'an Jiaotong University,Xi'an 710049,china 2. ational Key laboratory of {2. and technology on Microwave Imaging&Institute of Electronics,Chinese Academy of {2.s,Beijing 100049,china 1. Ministry of Education Key Lab for Intelligent Networks and Network Security Xi’an Jiaotong University Xi’an 710049 China2. National Key Laboratory of Science and Technology on Microwave Imaging & Institute of Electronics Chinese Academy of Sciences Beijing 100049 China

The displaced phase center antenna(DPCA)technique is an effective strategy to achieve wide-swath synthetic aperture radar(SAR)imaging with high azimuth ***,traditionally,it requires strict limitation of the pulse repetition frequency(PRF)to avoid non-uniform ***,any deviation could bring serious ambiguity if the data are directly processed using a matched *** break this limitation,a recently proposed spectrum reconstruction method is capable of recovering the true spectrum from the nonuniform ***,the performance is sensitive to the selection of the *** regularization based imaging may provide a way to overcome this *** existing time-domain method,however,requires a large-scale observation matrix to be built,which brings a high computational *** this paper,we propose a frequency domain method,called the iterative spectrum reconstruction method,through integration of the sparse regularization technique with spectrum analysis of the DPCA *** approximately expressing the observation in the frequency domain,which is realized via a series of decoupled linear operations,the method performs SAR imaging which is then not directly based on the observation matrix,which reduces the computational cost from O(N2.to O(N log N)(where N is the number of range cells),and is therefore more efficient than the time domain *** sparse regularization scheme,realized via a fast thresholding iteration,has been adopted in this method,which brings the robustness of the imaging process to the PRF *** provide a series of simulations and ground based experiments to demonstrate the high efficiency and robustness of the *** simulations show that the new method is almost as fast as the traditional mono-channel algorithm,and works well almost independently of the PRF ***,the suggested method can be accepted as a practical and efficient wide-swath SAR imaging technique.

关键词： displaced phase center antenna sparse regularization iterative thresholding spectrum reconstruction