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Identification of ten new Galactic HII regions

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Science china(Physics,Mechanics & Astronomy) 2010年第6期53卷 1144-1152页

作者： RUAN GuiPing 1,2.& SHI WeiBin 1,2.1 Shandong Provincial key laboratory of {2. Astronomy and Solar-Terrestrial environment,School of Space Science and Physics,Shandong University at Weihai,Weihai 2.42.9,china 2.key laboratory of {2. Astronomy,national Astronomical Observatories,Chinese Academy of Sciences,Beijing 100012.china 1. Shandong Provincial key laboratory of {2. Astronomy and Solar-Terrestrial environment School of Space Science and Physics Shandong University at Weihai Weihai 264209 China2. Key Laboratory of Optical Astronomy National Astronomical Observatories Chinese Academy of Sciences Beijing 100012 China

We discovered ten large HII regions in the Sino-German λ6 cm polarization survey of the Galactic plane. They have been identified according to their flat spectral indexes and the high ratio between the 60 μm infrared emission and the λ6 cm emission. The integrated flux densities as well as the sizes of these sources are given at 4800 MHz. Cross-identifications are made with other major radio catalogs.

关键词： radio continuum general-methods observational-HII regions

Atmospheric correction of HJ-1A/B CCD images over Chinese coastal waters using MODIS-Terra aerosol data

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Science china(Technological Sciences) 2010年第S1期53卷 191-195页

作者： TIAN LiQiao 1,LU JianZhong 1,CHEN XiaoLing 1,2.3,YU ZhiFeng 1,XIAO JingJing 1,QIU Feng 1 & ZHAO Xi 1 1 State key laboratory of Information Engineering in Surveying,Mapping and Remote Sensing,Wuhan University,Wuhan 430079,{2. 2.0} laboratory of Poyang Lake Wetland and Watershed Research,Ministry of Education,Jiangxi Normal University,Nanchang 33002.,{2. 3 The key laboratory of Poyang Lake environment and Resource Utilization,Ministry of Education,Nanchang University,Nanchang 330031,{2. 1. State key laboratory of Information Engineering in Surveying Mapping and Remote Sensing Wuhan University Wuhan 430079 China 2. key laboratory of Poyang Lake Wetland and Watershed Research Ministry of Education Jiangxi Normal University Nanchang 330022 China 3. The key laboratory of Poyang Lake {2. and Resource Utilization Ministry of Education Nanchang University Nanchang 330031 China

This paper demonstrates an atmospheric correction method to process HJ-1A/B CCD images over Chinese coastal waters with the aid of MODIS-Terra aerosol *** on the assumption of zero water-leaving radiance at the two near-infrared (NIR)bands or the shortwave infrared(SWIR)bands,the atmospheric aerosol optical depth(AOD)is firstly retrieved from MODIS-Terra with a simple extension of the NIR-SWIR combined atmospheric correction approach embedded in SeaDAS (SeaWiFS data analysis system).Then the"turbid"and"non-turbid"waters are separated by the turbid water *** probability of AOD at 551 nm band is derived based on the NIR information over"non-turbid"waters and FLAASH model is selected to do the atmospheric correction of the HJ-1A/B CCD imagery using the AOD values of highest probabilities as ***,according to the histogram of the AOD distribution at 551 nm band,the studied turbid water area is divided into several blocks and HJ-1A/B CCD imagery is corrected with the corresponding AOD values displayed with the highest frequency in each *** method has been applied to several HJ-1A/B images over Chinese coastal waters and validated by synchronous in-situ *** results have shown that this method is effective in the atmospheric correction process of HJ-1A/B CCD images for ocean color remote sensing study and application in the coastal waters.

关键词： ocean color remote sensing atmospheric correction turbid coastal waters HJ-1A/B MODIS

Estimation of suspended sediment concentration based on bio-optical mechanism and HJ-1 image in Chaohu Lake

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Science china Earth Sciences 2010年第S1期53卷 58-66页

作者： WANG Qiao1,2.JIN Xin2.LI YunMei2.WU ChuanQing1,Lü Heng2.WANG YanFei2.ZHANG Hong2.YIN Bin2.& ZHU Li1 1Satellite environment Center,Ministry of environmental Protection,Beijing 10002.,{2. 2.3} laboratory of Virtual Geographic environment of Education Ministry,Nanjing Normal University,Nanjing 2.0046,{2. 1. Satellite environment Center Ministry of Environmental Protection Beijing 100029 China2. Key Laboratory of Virtual Geographic Environment of Education Ministry Nanjing Normal University Nanjing 210046 China

Synchronization experiment was conducted in June,2.09 to get Inherent optical Properties(IOP) of water component in Chaohu *** bio-optical mechanism was studied combined with multispectral data of {2.al Satellite 1(CCD),and then inversion models of total suspended matter(TSM),inorganic suspended matter(ISM) and organic suspended matter(OSM) concentration were *** data indicated that:the absorption ratio of suspended particulate matter and CDOM to total were almost no change from band 1 to band 2.with about 85% and 9%,*** ratio of pure water to total increased from 0.4% to 5.6%.Water reflectance in these two bands were influenced by absorption of three kinds of components:algae particles absorption surpassed non-algal particles in band 3,and so played an important role in total absorption with about 35.7%;the proportion of pure water absorption and particles matter backscattering both were 99% in band 4,so these two components decided the main inherent optical properties in band *** models of TSM and ISM concentration inversion based on band combination(band 3 + band 4)/(band 1 + band 2. were built,while OSM concentration was estimated by band 4/(band 1 + band 2. *** by image data,RE of TSM concentration between modeled and measured was 33.4%,and RMSE was 18.68 mg/*** of ISM and OSM concentration were 39.9% and 35.2. *** inversion was more accurate when satellite-ground data were just in the same *** this situation,RE of ISM concentration dropped to 2..4%,and that of TSM and OSM reduced to 2..5% and 2..8% as well.

关键词： HJ-1 Satellite bio-optical property Chaohu Lake suspended matter

Statistical study on the relationship between halo CME and coronal dimming

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Science china(Technological Sciences) 2010年第7期53卷 2020-2024页

作者： LIU Kai1, XIA LiDong2. CHEN Yao2.& SONG HongQiang2.1 School of Earth and Space Sciences, University of Science and Technology of china, Hefei 2.002., china 2.Shandong Provincial {2. laboratory of optical Astronomy and Solar-Terrestrial environment, School of Space Science and Physics, Shandong University at Weihai, Weihai 2.42.9, china 1. School of Earth and Space Sciences University of Science and Technology of China Hefei 230026 China2. Shandong Provincial Key Laboratory of Optical Astronomy and Solar-Terrestrial Environment School of Space Science and Physics Shandong University at Weihai Weihai 264209 China

The data from SOHO/EIT and SOHO/LASCO observations are used to determine the relationship between coronal dimming and full halo CME (coronal mass ejection). The events of full halo CME examined in this study were observed by LASCO co-ronagraphs and taken from the CD AW CME catalog from 1996 to 2.08. Dimming events are identified by using difference images taken by EIT at the 195 A passband. We found strong relationship between full halo CMEs and the coronal dimming events, with up to 93.3% of the front-side halo CMEs associated with the EIT 195 A dimming events. Full halo CMEs that show no clear signatures of dimming usually have lower sky plane velocities (<700 km/s) compared to the mean velocity of CMEs associated with dimming.

关键词： Sun coronal mass ejection coronal dimming extreme-ultraviolet

Characterization and Corrosion Resistance of Laser Clad-ding Al_2._3-13%TiO_2.Coating on AZ91D Magnesium Alloy

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稀有金属材料与工程 2011年第S4期40卷 221-225页

作者： Qian Jiangang1,Zhang Jiaxiang1,2.Xu Min1,2.Li Shuqing2.1School of Chemistry and environment,Beijing University of Aeronautics and Astronautics,Beijing 100191,china2.2. key laboratory for High Energy Density Beam Processing Technology,Beijing 10002.,china Beijing Univ Aeronaut & Astronaut Sch Chem & Environm Beijing 100191 Peoples R China Natl key Lab High Energy Dens Beam Proc Technol Beijing 100024 Peoples R China

An Al2.3-13%TiO2.(AT-13) ceramic coating was prepared on an AZ91D Mg alloy substrate by the laser plasma hybrid spraying technique.X-ray diffraction (XRD) and scanning electron microscopy (SEM) were used to identify the phases and to study the morphology,*** adhesion strength and the metallographic structure of the coating were measured by using a tensile testing machine and an optical microscope (OM),*** microhardness was measured using a micro Vickers hardness *** results show that after laser remelting,metallurgic bonding occurred at the interface between the Al transition layer and the *** adhesion strength of the coating increased from 17.01 to 2..47 *** coating became *** metastable γ-Al2.3 phase in the coating without laser remelting transformed completely into the stable α-Al2.3 *** microhardness was improved from HV0.052.0 to HV0.0542. and the time of salt spraying increased from 2.8 to 336h.

关键词： laser plasma hybrid spraying Mg alloy corrosion resistance

Generation of surface electrons in femtosecond laser-solid interactions

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Science china(Physics,Mechanics & Astronomy) 2006年第3期49卷 335-340页

作者： XU Miaohua1, LI Yutong1, YUAN Xiaohui1,2. ZHENG Zhiyuan1, LIANG Wenxi1, YU Quanzhi1, ZHANG Yi1, WANG Zhaohua1, WEI Zhiyi1 & ZHANG Jie1 1. key laboratory of {2. Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100080, china 2. State key laboratory of Transient Optics Technology, Chinese Academy of Sciences, Xi’an 710068, china key laboratory of {2. Physics Institute of Physics Chinese Academy of Sciences Beijing 100080 China State key laboratory of Transient Optics Technology Chinese Academy of Sciences Xi’an 710068 China

The characteristics of hot electrons produced by p-polarized femtosecond laser-solid interactions are studied. The experimental results show that the outgoing electrons are mainly emitted in three directions: along the target surface, the normal direction and the laser backward direction. The electrons flowing along the target surface are due to the confinement of the electrostatic field and the surface magnetic field, while the electrons in the normal direction due to the resonant absorption.

关键词： hot electrons,surface magnetic field,femtosecond laser pulses

HCWCI/Carbon Steel Bimetal Liner by Liquid-Liquid Compound Lost Foam Casting

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Journal of Iron and Steel Research International 2012年第10期19卷 13-19页

作者： XIAO Xiao-feng1,2. YE Sheng-ping2. YIN Wei-xin3, XUE Qiong4 (1. School of Mechanical Engineering and Automation, Wuhan Textile University, Wuhan 430073, Hubei, china 2. State key {2. of Material Processing and Die and Mould Technology, Huazhong University of Science and Technology, Wuhan 430074, Hubei, china 3. Wuhan Zhike Abrasive-Resistant Material Science and Technology Development Co Ltd, Wuhan 430073, Hubei, china 4. College of Science, Wuhan University of Technology, Wuhan 430079, Hubei, china) [a] School of Mechanical Engineering and Automation Wuhan Textile University Wuhan 430073 Hubei China [b] State key laboratory of Material Processing and Die and Mould Technology Huazhong University of Science and Technology Wuhan 430074 Hubei China [c] Wuhan Zhike Abrasive-Resistant Material Science and Technology Development Co Ltd Wuhan 430073 Hubei China [d] College of Science Wuhan University of Technology Wuhan 430079 Hubei China

Impact, friction and corrosion from the grinding balls and the grinding medium during the mineral processing result in liner breakage. Liner, made from Hadfield steel or alloyed steel, could not have served in wet grinding environment for more than ten months. Composite liner, made from HCWCI (high Cr white cast iron) and carbon steel, has been developed successfully with liquid-liquid composing process based on LFC (lost foam casting). The microstructure of composite was analyzed with optical microscope, SEM (scanning electron microscope)/EDX energy-dispersive X-ray and XRD (X-ray diffraction). According to micrograph, the combination region of two metals was staggered like dogtooth, no mixtures occurred between two liquid metals, and its interface presented excellent metallurgical bonding state. The results of mechanical property test show that, the hardness of HRC, the fracture toughness, and the bending strength are more than 61, 16.5 J/cm2.and 1 600 MPa, respectively. Comparison between liners made from bimetal composite and alloyed steel has also been investigated in industrial hematite ball mill. The results of eight months test in wet grinding environment prove that the service life of bimetal composite liner is three times as long as that of one made from alloyed steel.

关键词： composite liner bimetal liquid-liquid compound composite interface lost foam casting high Cr white cast iron

Synthesis,characterization,structures and magnetic property of chiral oxalate-bridged dicopper(Ⅱ) complexes

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Science china Chemistry 2010年第6期53卷 1255-1260页

作者： WU Ling1,WANG Jun2.ZHU CaiFei1,LIN YiJi1,CHEN LeiQi1,FAN Jun2.& ZHANG Hui1 1State key laboratory of Physical Chemistry of Solid Surfaces Department of Chemistry,College of Chemistry and Chemical Engineering,Xiamen University,Xiamen 361005,{2. 2.chool of Chemistry and environment,South china Normal University,Guangzhou 510006,{2. 1. State key laboratory of Physical Chemistry of Solid Surfaces Department of Chemistry College of Chemistry and Chemical Engineering Xiamen University Xiamen 361005 China2. School of Chemistry and Environment South China Normal University Guangzhou 510006 China

The oxalato-bridged dicopper(II) complexes [Cu2.μ-ox)(LRR)2.H2.)2.ClO4)2. (1),[Cu2.μ-ox)(LRR)2.CH3COCH3)2.ClO4)2.(1a),[Cu2.μ-ox)(LSS)2.H2.)2.ClO4)2. (2. and [Cu2.μ-ox)(LRR)(LSS)2.CH3COCH3)2.ClO4)2. (3) [LRR = (8R,10R)-(-)-[4,5]-pineno2.2.-bipyridine,LSS = (8S,10S)-(+)-[4,5]-pineno-2.2.-bipyridine;ox2. oxalate] were first prepared.A possible mechanism for the formation of the chial dicopper(II) complexes was *** on elemental analysis,conductance measurement,UV-Vis spectra,CD spectra and X-ray single-crystal diffraction,the oxalato-bridged structures of 1 and 2.were deduced to adopt two Cu(II) ions and the bridged oxalate lying in the nearly same *** crystal structures of 1a and 3 reveal that the coordination geometry around each Cu(II) ion is an elongated and distorted octahedron and two axial solvent molecules and two perchlorate ions are anti to each other respectively in both binuclear *** solution CD spectra of 1 and 2.in the visible d-d range show very weak Cotton effects with peaks at 588 and 779 nm,which are approximately of mirror image,suggesting the optical activities may be derived from the vicinal effects of the chiragenic centers at the pinene group of LRR and LSS,*** 1 has been characterized by variable-temperature magnetic susceptibility and the data was least-square fitted to the Blenaey-Bowers *** exchange integral J was found to be -338.41(4) cm-1,indicating a strong antiferromagnetic interaction between two copper(II) ions.

关键词： dicopper(II) complex chiral bipyridine μ-oxalate bridge crystal structure CD spectroscopy magnetic property

The application of hyperspectral remote sensing to coast environment investigation

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Acta Oceanologica Sinica 2009年第2期28卷 1-13页

作者： ZHANG Liang ZHANG Bin CHEN Zhengchao ZHENG Lanfen TONG Qingxi State key laboratory of Remote Sensing Science Institute of Remote Sensing Applications Chinese Academy of Science Beijing 100101 China Naval Institute of Hydrographic Surveying and Charting Tianjin 300061 China Center for Earth Observation and Digital Earth Chinese Academy of Science Beijing 100190 China

Requirements for monitoring the coastal zone environment are first summarized. Then the appli- cation of hyperspectral remote sensing to coast environment investigation is introduced, such as the classification of coast beaches and bottom matter, {2. recognition, mine detection, oil spill identification and ocean color remote sensing. Finally, what is needed to follow on in application of hyperspectral remote sensing to coast environment is recommended.

关键词： hyperspectral remote sensing coastal zone ocean color remote sensing