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Radiometric cross-calibration of the CBERS-02.CCD camera with the TERRA MODIS

Science china(Technological Sciences) 2005年第S2期48卷 44-60页

作者： LI Xiaoying1,2.3, GU Xingfa1,3,4, MIN Xiangjun5, YU Tao1,3, FU Qiaoyan5, ZHANG Yong1,2.3 & LI Xiaowen1,3 1. State Key Laboratory of Remote Sensing Science, Jointly Sponsored by the Institute of Remote Sensing Applications of Chinese Academy of Sciences and Beijing Normal University, Beijing 100101, china 2. Graduate University of Chinese Academy of Sciences, Beijing 100039, china 3. The {2. for National Spaceborne Demonstration, Beijing 100101, china 4. Institut National de la Recherche Agronomique, Climat Sol Environnement, 84914 Avignon, France 5. china {2. for Resource Satellite Data and Application, Beijing 100830, china 1. State Key Laboratory of Remote Sensing Science Jointly Sponsored by the Institute of Remote Sensing Applications of Chinese Academy of Sciences and Beijing Normal University 100101 Beijing China 2. Graduate University of Chinese Academy of Sciences 100039 Beijing China 3. The center for National Spaceborne Demonstration 100101 Beijing China 4. Institut National de la Recherche Agronomique Climat Sol Environnement 84914 Avignon France 5. china center for Resource Satellite Data and Application 100830 Beijing China

For the application of the CCD camera, the most important payload on CBERS-02. the key is to provide long-term stable radiometric calibration coefficients. Although the vicarious calibration had been proved successful, it had its limitations such as test site requirement and unsuitable for historical data. Cross-calibration is one of the alternative methods, but it needs synchro surface spectrum to achieve spectral band matching factors. Our effort is to probe the influences on these factors. Simulations with a lot of surface spectrum showed that the factors changed with the viewing geometry, atmospheric condition and surface targets. However, simulating with the same viewing geometry and atmospheric condition, the spectral band matching factors of the same or similar surface targets’ spectrum acquired from different dates and different places would like to be consistent to each other within 1%―5%. Thus, the synchro measurement data can be substituted by the same or similar target from other source. Based on this method, using the MODIS as the reference, the cross-calibration was performed for CCD camera. The research demonstrated that the traditional method with single calibration site was inappropriate for CCD camera, since the offsets for its four spectral bands were not zeros. With four calibration sites, these offsets were obtained. And the camera was detected to degrade with dates based on four times of cross-calibrations.

关键词： CBERS-02 CCD camera cross-calibration the spectral band matching factors.

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Emulsive properties of nanometer TiO_2.ultrafine powder in oil-water system

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Chinese Science Bulletin 1997年第21期42卷 1847-1848页

作者： WANG BaohuiDepartment of Petrochemical Engineering and center of analysis and Testing, Daqing Petroleum Institute, Anda 151400,{2. Department of Petrochemical Engineering and center of analysis and Testing Daqing Petroleum Institute Anda China

INVESTIGAORS recognized the role of finely divided insoluble solid particles in stabilizing oil-water emulsions in the 192.s. The work has been extensively done since the 1980s. Butthe studies only focused on particles with the parameter up to micrometer size rather than thoseof nanometer size. In this letter, emulsive properties, including the type, ability and mecha-

关键词： TiO Emulsive properties of nanometer TiO2.ultrafine powder in oil-water system

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Biological networks to the analysis of microarray data

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Progress in Natural Science:Materials International 2006年第12期16卷 1242-1251页

作者： FANG Zhuo~1, LUO Qingming~1**, ZHANG Guoqing~1 and LI Yixue~2.*(1. Hubei Bioinformatics and Molecular Imaging Key Laboratory,Huazhong University of Science and Technology, Wuhan 430074, china 2. Shanghai center for Bioinformation and Technology, Shanghai 2.02.5, china) [a]Hubei Bioinformatics and Molecular Imaging Key Laboratory Huazhong University of Science and Technology Wuhan China [b]Shanghai center for Bioinformation and Technology Shanghai China

Microarray technology, which permits rapid and large-scale screening for patterns of gene expressions, usually generates a large amount of data. How to mine the biological meanings under these data is one of the main challenges in bioinformatics. Compared to the pure mathematical techniques, those methods incorporated with some prior biological knowledge generally bring better interpretations. Recently, a new analysis, in which the knowledge of biological networks such as metabolic network and protein interaction network is introduced, is widely applied to microarray data analysis. The microarray data analysis based on biological networks contains two main research aspects: identification of active components in biological networks and assessment of gene sets significance. In this paper, we briefly review the progress of these two categories of analyses, especially some representative methods.

关键词： biological networks microarray data analysis subnetwork gene set.

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Use-wear analysis confirms the use of Palaeolithic bone tools by the Lingjing Xuchang early human

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Chinese Science Bulletin 2010年第21期55卷 2282-2289页

作者： LI ZhanYang 1,4 & SHEN Chen 2.3,4 1 Henan Provincial Institute of Cultural Relics and Archaeology,Zhengzhou 450000,china 2.The Joint Laboratory of Human Evolution and Archaeometry,Chinese Academy of Sciences,Beijing 100044,china 3 The Royal Ontario Museum,Toronto ON M5S2.6,Canada 4 Oriental Archaeology Research {2. of Shandong University,Jinan 2.0100,china Henan Provincial Institute of Cultural Relics and Archaeology Zhengzhou 450000 China Oriental Archaeology Research center of Shandong University Jinan 250100 China The Joint Laboratory of Human Evolution and Archaeometry Chinese Academy of Sciences Beijing 100044 China The Royal Ontario Museum Toronto ON M5S2C6 Canada

During 2.07-2.08 excavations at the Lingjing site near Xuchang,Henan Province,dated back to around 100-80 ka ago,a large quantity of mammalian fossil remains were recovered along with a remarkable cluster of Early Modern Human(EMH) skull fragments in *** some of those animal bones were probably modified into tools.A use-wear analysis was carried out to examine the functions of modified bone *** results suggest that Lingjing bone tools were used for drilling,penetrating,and scraping animal substances,and that some might have been hafted during the *** study confirms that early existence ofintentionally-modified bone tools at human occupations of the early Late Pleistocene in northern *** discovery suggests making and use of bone tools were inevitably a part of early human behaviors and cultural development,as such of stone tools.

关键词：早期人类磨损分析旧石器时代工具许昌哺乳动物化石现代人类动物骨头

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Thermodynamic analysis of the Preparation Process of EB-PVD SiC Coating

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Journal of Wuhan University of Technology(Materials Science) 2009年第3期24卷 363-366页

作者：易剑 School of Mechatronics Engineering Taizhou University Laser Processing center Tianjin Polytechnic University center for Composite Materials Harbin Institute of Technology

The process of preparing SiC coating by electron beam-physical vapor deposition （EB-PVD） was discussed from viewpoint of thermodynamis. Results show that within the temperature range of 2.700-3 300 K, the ratio of SiC in the SiC coating doesn＇t change much and keeps around 0.7. Purity of the as-deposited SiC coating is not high. To improve the purity of the SiC coating, the SiC ingot is required to not be, necessary in full density but be fine-grained.

关键词： thermodynamics SiC coating EB-PVD ratio of SiC purity

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Solar release time of solar energetic particles and associated acceleration source in corona

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Chinese Science Bulletin 2008年第2期53卷 161-168页

作者： LE GuiMing1,2.3,4, TANG YuHua1 & HAN YanBen4 1 Department of Astronomy, Nanjing University, Nanjing 2.0093, china 2.Key Laboratory of Radiometric Calibration and Validation for Environmental Satellites, china Meteorological Administration, Beijing 100081, china 3 National center for Space Weather, china Meteorological Administration, Beijing 100081, china 4 National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012. china Department of Astronomy Nanjing University Nanjing China Key Laboratory of Radiometric Calibration and Validation for Environmental Satellites China Meteorological Administration Beijing China National center for Space Weather China Meteorological Administration Beijing China National Astronomical Observatories Chinese Academy of Sciences Beijing China

Solar energetic particles (SEPs) are accelerated in corona at an early phase of solar energetic particle events (SEPE). The acceleration mechanism of SEPs in corona can only be inferred from an analysis of multi-band observational data, as the observation of SEPs is usually made around 1AU. In this context, people have investigated spectrums, charge state, solar release time (SRT), and multi-band data of SEPEs, in an attempt to judge the acceleration mechanism of SEPs. The SRT computation of SEPs is an important and commonly used approach to study the acceleration mechanism of SEPs in corona. This paper reviews some important findings concerning the SRT computation of SEPs, and analyzes different merits of each approach for such calculation, based on a range of SEPE case studies. This paper also analyzes and discusses both possible and actual acceleration mechanisms of a number of SEPEs, by calculating the SRT of the SEPEs. Finally, the paper summarizes the possible problems in studying an acceleration mechanism of SEPEs inferred from the SRT of SEP.

关键词：阳光释放时间加速度电晕太阳耀斑

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Kalman filtering for time-delayed linear systems

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Science in china(Series F) 2006年第4期49卷 461-470页

作者： LU Xiao1,2.& WANG Wei1 1. Research center of Information and Control, Dalian University of Technology, Dalian 11602., china 2. Shenzhen Graduate School, Harbin Institute of Technology, Shenzhen 518055, china 1. Research center of Information and Control Dalian University of Technology Dalian 116024 China 2. Shenzhen Graduate School Harbin Institute of Technology Shenzhen 518055 China

This paper is to study the linear minimum variance estimation for discretetime systems. A simple approach to the problem is presented by developing re-organized innovation analysis for the systems with instantaneous and double time-delayed measurements. It is shown that the derived estimator involves solving three different standard Kalman filtering with the same dimension as the original system. The obtained results form the basis for solving some complicated problems such as H, fixed-lag smoothing, preview control, H, filtering and control with time delays.

关键词： discrete-time systems delayed measurements innovation analysis Riccati equations.

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Pathways of birnessite formation in alkali medium

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Science china Earth Sciences 2005年第9期48卷 1438-1451页

作者： FENG Xionghan1, TAN Wenfeng1, LIU Fan1, HUANG Qiaoyun1 & LIU Xiangwen2.1. College of Resources and Environment, Huazhong Agricultural University, Wuhan 430070, china 2. Testing center, china University of Geosciences, Wuhan 430074, china 1. College of Resources and Environment Huazhong Agricultural University 430070 Wuhan China 2. Testing center China University of Geosciences 430074 Wuhan China

Birnessite is a common weathering and oxidation product of manganese-bearing rocks. An O2.oxidation procedure of Mn(OH)2.in the alkali medium has been used to synthesize birnessite. Fast and powder X-ray diffraction (XRD), transmission electron microscopy (TEM), electron diffraction (ED), energy dispersed X-ray analysis (EDAX), infrared spectroscopy (IR) techniques and chemical composition analysis, Eh-pH equilibrium diagram approaches were employed to investigate the reaction process and pathways of birnessite formation. Results showed that the process of the birnessite formation could be divided into four stages: (1) forma- tion stage for hausmannite and feitknechtite, (2. stage of transformation of hausmannite and feitknechtite to buserite, (3) buserite crystal growing stage, and (4) stage of conversion of buser- ite into birnessite. Mn(OH)2.was mainly present as amorphous state only for a short initial time of oxidation reaction. In the oxidation process, buserite formed following two pathways by recrys- tallization after dissolution of the intermediates, and the transformations of the minerals de- pended on the Eh determined by the dissolved O2.concentration on their surfaces. The results are fundamental in further exploration on the mechanism of birnessite formation in the alkali medium. A great practical significance would also be expected with respect to the areas of mate- rial sciences.

关键词： birnessite, pathway of formation, reaction process, Eh-pH diagram, hausmannite, feitknechtite.

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Electronic Structure Calculation for Co_6(μ_6-C)(μ_3-S)_2.CO)_(12. Cluster

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Chinese Chemical Letters 1997年第4期8卷 351-352页

作者： Wen LI Ye LIU Yuan Qi YIN( Lanzhou Institute of Chemical Physics, Academia Sinica)(Research center of analysis and {2., Fudan University, Shanghai 2.0433) ACAD SINICA LANZHOU INST CHEM PHYSLANZHOUPEOPLES R CHINA FUDAN UNIV RES CTR ANAL & MEASUREMENTSHANGHAI 200433PEOPLES R CHINA

The electronic Structure ofCo6(μ_6-C)(μ_3-S)_2.CO)_(12. molecule has been calculated by DV-Xα method. The results show that the reaction mechanism of CS_2.and Co2.CO)8 in synthsis seems only to undergo the additive and decarbonyl processes. The other result worthy of being mentioned is the calculated atonmic charges that are Co0.3+,S1.2.+,μ6-Cl. 16-,C0.06- and O0.2.-.S atom has not only the positive charge but also four times as much as that of Co atom. This is not in accordance with the electronegativihes of 1.7 and 2.5 respectively for Co and S atom

关键词： Co CO Cluster

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Similar component analysis

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Progress in Natural Science:Materials International 2006年第12期16卷 1343-1347页

作者： ZHANG Hong~1**, WANG Xin~1, LI Junwei~2.and CAO Xianguang~1(1. Image center, Astronautics School, BeiHang University, Beijing 100083, china 2. The 2.7th Institute of the Second Academy of china Aerospace Science Industry Corporation, Beijing 100854, china) [a]Image center Astronautics School BeiHang University Beijing China [b]The 2.7th Institute of the Second Academy of china Aerospace Science Industry Corporation Beijing China

A new unsupervised feature extraction method called similar component analysis (SCA) is proposed in this paper. SCA method has a self-aggregation property that the data objects will move towards each other to form clusters through SCA theoretically, which can reveal the inherent pattern of similarity hidden in the dataset. The inputs of SCA are just the pairwise similarities of the dataset, which makes it easier for time series analysis due to the variable length of the time series. Our experimental results on many problems have verified the effectiveness of SCA on some engineering application.

关键词： clustering feature extraction similar component.

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