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A method and results of color calibration for the Chang'e-3 terrain camera and panoramic camera

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Research in Astronomy and Astrophysics 2014年第12期14卷 1557-1566页

作者： xin ren Chun-Lai Li Jian-Jun Liu Fen-Fei Wang Jian-Feng Yang En-Hai Liu Bin Xue Ru-Jin Zhao Key Laboratory of Lunar and Deep Space Exploration National Astronomical ObservatoriesChinese Academy of Sciences Xi’an Institute of Optics and Precision Mechanics Chinese Academy of Sciences Institute of Optics and Electronics Chinese Academy of Sciences

The terrain camera （TCAM） and panoramic camera （PCAM） are two of the major scientific payloads installed on the lander and rover of the Chang＇e 3 mission re- spectively. They both use a Bayer color filter array covering CMOS sensor to capture color images of the Moon＇s surface. RGB values of the original images are related to these two kinds of cameras. There is an obvious color difference compared with human visual perception. This paper follows standards published by the International Commission on Illumination to establish a color correction model, designs the ground calibration experiment and obtains the color correction coefficient. The image qual- ity has been significantly improved and there is no obvious color difference in the corrected images. Ground experimental results show that：（1） Compared with uncor- rected images, the average color difference of TCAM is 4.30, which has been reduced by 62.1%. （2） The average color differences of the left and right cameras in PCAM are 4.14 and 4.16, which have been reduced by 68.3% and 67.6% respectively.

关键词： Moon -- methods: data analysis -- techniques: image processing

Preliminary results of FeO mapping using Imaging Interferometer data from Chang'E-1

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Chinese Science Bulletin 2011年第4期56卷 376-379页

作者： LING ZongCheng ZHANG Jiang LIU JianZhong ZHANG WenXi BIAN Wei ren xin MU LingLi LIU JianJun LI ChunLai National Astronomical Observatories Chinese Academy of Sciences Beijing 100012 China School of Space Science and Physics & Shandong Provincial Key Laboratory of Optical Astronomy and Solar-Terrestrial Environment Shandong University at Weihai Weihai 264209 China Academy of Opto -Electronics Chinese Academy of Sciences Beijing 100080 China

Information about the variability,and spatial distribution of iron abundance is important to understand lunar geological history and for future resource utilization. In this paper we present a preliminary model to produce an iron abundance map using images taken by an Imaging Interferometer on board the satellite Chang'E-1. Compared with the Clementine UVVIS images,the images from the Chang'E-1 satellite also allowed for the extraction of FeO abundance distributions on the Moon. However,the prelimi-nary model results suggest an underestimation of ～2 wt.% for the FeO content of the mare region and an overestimation of ～3 wt.% for the highland region.

关键词： FeO含量嫦娥一号干涉仪像数映射资源利用率空间分布地质历史

不同水平日语学习者对“名词+を+和语动词”搭配的认知处理过程研究——兼与日语母语者比较

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解放军外国语学院学报 2020年第5期43卷 109-117页

作者：任向欣王冲大连理工大学外国语学院辽宁大连116024

本研究利用在线词汇判断任务,探讨了中国日语学习者对"名词+を+和语动词"搭配的认知处理过程。通过与日语母语者的结果对比,发现:1)日语母语者对"汉日一致"和"日语独有"类搭配的合法性判断无明显差异,而将"汉语独有"类搭配视为无关联项... 详细信息

本研究利用在线词汇判断任务,探讨了中国日语学习者对"名词+を+和语动词"搭配的认知处理过程。通过与日语母语者的结果对比,发现:1)日语母语者对"汉日一致"和"日语独有"类搭配的合法性判断无明显差异,而将"汉语独有"类搭配视为无关联项进行加工;2)学习者高低水平组之间结果的倾向一致,两组学习者在反应时间上有差异,但在错误率上未见差异,且高水平组在判断上更趋近于母语者;3)学习者对于"汉日一致"类能更好地利用母语和二语知识进行高效准确的识别,对于"日语独有"类也能进行高效且较准确的识别,但对于"汉语独有"类无法像日语母语者一样进行准确的识别。以上结果验证了Jiang(2000)的二语词汇发展模型,以及二语搭配对高水平二语学习者来说仍然是难以习得的这一结论。

关键词：日语学习者名词+を+和语动词搭配在线词汇判断任务启动效应

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管道凸起激波/湍流边界层干扰的数值模拟

应用力学学报 2008年第1期25卷 1-5页

作者：任鑫高歌北京航空航天大学北京100083

采用基于部分平均的湍流方程组,模拟了管道凸起流动中两种不同强度的激波-湍流边界层干扰现象,对流场的时均参数与实验值进行了比较,计算得到的壁面压力分布、摩阻系数分布、边界层厚度和速度型与实验值比较吻合很好。结果表明基于部分... 详细信息

采用基于部分平均的湍流方程组,模拟了管道凸起流动中两种不同强度的激波-湍流边界层干扰现象,对流场的时均参数与实验值进行了比较,计算得到的壁面压力分布、摩阻系数分布、边界层厚度和速度型与实验值比较吻合很好。结果表明基于部分平均的湍流方程组既能够准确模拟小分离的激波/湍流边界层干扰流动又能够准确模拟大分离的激波/湍流边界层干扰流动,较好地预测了典型的λ激波结构。

关键词：可压缩流体湍流激波/湍流边界层干扰基于部分平均的湍流方程组

使用GAO-YONG湍流方程组对扩压器流动的计算

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北京航空航天大学学报 2006年第1期32卷 36-39页

作者：任鑫高歌北京航空航天大学航空发动机气动热力重点实验室北京100083

采用基于同位网格的SIMPLE方法求解GAO-YONG不可压湍流方程组,对二维扩压器流动进行了数值模拟.通过界面速度动量插值法解决了压力锯齿波问题,并且采用了正交贴体网格和二阶QUICK格式离散对流项以提高计算精度.与实验结果以及BL(Baldw-L... 详细信息

采用基于同位网格的SIMPLE方法求解GAO-YONG不可压湍流方程组,对二维扩压器流动进行了数值模拟.通过界面速度动量插值法解决了压力锯齿波问题,并且采用了正交贴体网格和二阶QUICK格式离散对流项以提高计算精度.与实验结果以及BL(Baldw-Lo-max)模型计算结果的比较表明,不需要任何经验系数及壁面函数的GAO-YONG不可压湍流模型方程组能够对有压力梯度的湍流流动做出很好的预测.计算发现,在机械能方程中引入平均流压力梯度的作用,对GAO-YONG湍流方程组正确模拟逆压力梯度流动起到了关键作用.

关键词：数值模拟湍流 GAO-YONG湍流方程组扩压器

使用GAO-YONG湍流方程组对顶盖驱动方腔流的计算

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北京航空航天大学学报 2005年第2期31卷 138-141页

作者：任鑫高歌北京航空航天大学能源与动力工程学院北京100083

运用SIMPLER方法、QUICK格式及交错网格技术求解GAO YONG湍流方程组 ,对二维顶盖驱动方腔流进行数值模拟 ,得到方腔内的涡量分布和方腔中心水平剖线上的速度变化曲线 ,并与DNS(DirectlyNumericalSimulation)结果进行定性对比 ,有较好的... 详细信息

运用SIMPLER方法、QUICK格式及交错网格技术求解GAO YONG湍流方程组 ,对二维顶盖驱动方腔流进行数值模拟 ,得到方腔内的涡量分布和方腔中心水平剖线上的速度变化曲线 ,并与DNS(DirectlyNumericalSimulation)结果进行定性对比 ,有较好的一致性 .结果表明 ,GAO YONG湍流方程组中与湍流多尺度现象相对应的机械能方程对此湍流方程组能够合理地模拟出顶盖驱动方腔流中复杂的湍流粘性分布以及湍流能量逆转现象起到了关键作用 .研究进一步证明了GAO YONG湍流方程组能够得到复杂流动的真实粘性场 .

关键词：数值模拟湍流 GAO-YONG湍流方程组顶盖驱动方腔流

Preliminary results of TiO_2 mapping using Imaging Interferometer data from Chang'E-1

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Chinese Science Bulletin 2011年第20期56卷 2082-2087页

作者： LING ZongCheng ZHANG Jiang LIU JianZhong ZHANG WenXi ZHANG GuangLiang LIU Bin ren xin MU LingLi LIU JianJun LI ChunLai National Astronomical Observatories Chinese Academy of SciencesBeijing 100012China School of Space Science and Physics & Shandong Provincial Key Laboratory of Optical Astronomy & Solar-Terrestrial Environment Shandong University at WeihaiWeihai 264209China Academy of Opto-Electronics Chinese Academy of SciencesBeijing 100080China

The distribution of titanium abundance on the lunar surface is important knowledge for lunar geologic studies and future resource *** this paper,we develop a preliminary model based on"ground truths"from Apollo and Luna sample-return sites to produce a titanium abundance map from Chang’E-1 Imaging Interferometer(IIM) *** derived TiO2 abundances are validated with Clementine UVVIS results in several regions,including lunar highlands neighboring the Apollo 16 landing site,and high-Ti and low-Ti maria near the standard site of Mare Serenitatis(MS2) .The validation results show that TiO2 abundances modeled with Chang’E-1 IIM data are overestimated for highlands(～0.7 wt.%) and low-Ti maria(～1.5 wt.%) and underestimated for high-Ti maria(～0.8 wt.%).

关键词：二氧化钛干涉仪嫦娥一号成像映射月球表面资源利用率玛丽亚

Static globularization and grain morphology evolution ofαandβphases during annealing of hot-rolled TC21 titanium alloy

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Transactions of Nonferrous Metals Society of China 2021年第9期31卷 2664-2676页

作者： Ke WANG Ming-yu WU Zhao ren Yu ZHANG ren-long xin Qing LIU International Joint Laboratory for Light Alloys(MOE) College of Materials Science and EngineeringChongqing UniversityChongqing 400044China

A lamellar-structure TC21 titanium alloy was hot-rolled and subsequently annealed at 820,880 and 940℃ for 1 and 6 h,and the effects of annealing parameters on static globularization and morphology evolution of bothαandβphases were *** results show thatαglobularization process is sluggish due to the limited boundary splitting at 820℃.With increasing temperature to 880℃,the accelerated boundary splitting and termination migration promote theα*** 820 and 880℃,the static recovery(SRV)and recrystallization(SRX)induce the grain refinement of interlamellarβ***,the excessively high temperature of 940℃ results in the coarsening ofαgrains due to the assistance of Ostwald ripening,and produces coarseβgrains mainly due to the absence of SRX in interlamellarβ***,880℃ is an appropriate annealing temperature to produce a homogeneous microstructure in which globularizedαand refinedβgrains distribute homogeneously.

关键词： TC21 titanium alloy αglobularization recrystallization grain refinement

Observations and interpretations of geomorphologic features in the Tianwen-1 landing area on Mars by using orbital imagery data

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Earth and Planetary Physics 2023年第3期7卷 331-346页

作者： Hai Huang xing Wang Yuan Chen Qing Zhang FeiYue Zhao xin ren xingGuo Zeng Wei Yan WangLi Chen Bin Liu DaWei Liu LianBo Fu JianJun Liu Key Laboratory of Lunar and Deep Space Exploration National Astronomical ObservatoriesChinese Academy of SciencesBeijing 100101China School of Astronomy and Space Science University of Chinese Academy of SciencesBeijing 100049China

China’s first Mars exploration mission,Tianwen-1,successfully landed in southern Utopia Planitia on Mars on May 15,*** work presents a detailed investigation of the geologic context of the landing area surface for this mission based on orbital remotesensing *** constructed a geomorphologic map for the Tianwen-1 landing *** of our detailed geomorphologic map show several major landforms within the landing area,including rampart craters,mesas,troughs,cones,and *** of materials on the landing area surface indicates that most of the landing area is covered by Martian *** aeolian ridges are widely distributed within the landing area,indicating the surface contexts were(and still are)modified by regional *** addition,a crater counting analysis indicates the landing area has an absolute model age of~3.3 Ga and that a later resurfacing event occurred at~1.6 ***,we outline four formational scenarios to test the formation mechanisms for the geomorphologic features on the landing area *** most likely interpretation to explain the existence of the observed surface features can be summarized as follows:A thermal influence may have played an important role in the formation of the surface geomorphologic features;thus,igneous-related processes may have occurred in the landing *** ice may also have been involved in the construction of the primordial surface *** resurfacing events and aeolian processes buried and modified the primordial surface.

关键词： Mars Utopia Planitia Tianwen-1 geomorphologic features water ice heat source