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基于CloudSat-CALIPSO数据的黄土高原地区云特征分析

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高原气象 2024年第3期43卷 583-594页

作者：尤丹丹张淑花金存银王倩茹西安科技大学测绘科学与技术学院陕西西安710054

云是地气系统的重要组成部分,为深入分析黄土高原地区云特征,利用2007-2016年搭载首部云探测雷达云卫星(CloudSat)与云-气溶胶激光雷达和红外探测者观测卫星(The Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observation, C... 详细信息

云是地气系统的重要组成部分,为深入分析黄土高原地区云特征,利用2007-2016年搭载首部云探测雷达云卫星(CloudSat)与云-气溶胶激光雷达和红外探测者观测卫星(The Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observation, CALIPSO)资料,选取黄土高原半湿润、半干旱、干旱和寒旱四个区域,对云的宏、微观物理特征进行了分析。结果表明:(1)黄土高原各区域云出现频率年均值达到了55%以上,其中,春、夏季云出现频率最高,秋冬两季相对较低;半湿润区云出现频率高于其他区域,但其他三个区域云出现频率最高的月份均早于半湿润区。(2)各区域中单层云出现频率最高,占到总云量的60%以上,多层云中主要是双层云,约占总云量的25%。云层高度在不同区域表现为春、夏季节大于秋、冬季节,半湿润区的云层高度在四季均大于其他区域。各区域云几何厚度季节变化不显著,均在1~4 km之间,主要以薄云为主,且78.13%的云几何厚度不超过2 km。(3)各区域的云液态水含量年均值均达到了220.5 mg·m^(-3),约为冰水含量年均值的6.5倍,主要分布在8.5 km以下的高度层。随着高度的减小,液态水含量逐渐增多,其中半湿润区云液态水含量大于其他区域。各区域全年冰水含量占比较小,主要分布在16.5 km以下的高度层。(4)液滴有效半径在各区域的值主要集中在12~16μm,在半干旱区的春季出现了最大值,约为24μm;冰粒子有效半径最大值出现在半湿润区的夏季。液滴数浓度在各区域的值集中在60~80 cm^(-3),均小于冰粒子数浓度平均值,其峰值出现在各区域的夏季,冰粒子数浓度的峰值出现在半湿润和半干旱区的春季。该研究结果有助于深入认识黄土高原云的特征,为区域气候模式对黄土高原地区云特征的模拟提供一定的参考依据。

关键词：黄土高原 CloudSat-CALIPSO 云垂直结构宏微观物理特征

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电子玻璃配合料均匀度检测方法对比研究

中国建材科技 2024年第S01期33卷 120-122页

作者：樊雨实丁萍萍游丹丹青岛融合光电科技有限公司山东青岛266426

比较压片法和熔融法在检测玻璃原料配合料均匀度方面的差异。压片法具有成本效益高且无需额外添加材料的优点,因而可成为检测电子玻璃原料配合料均匀度的优化选择,通过使用X-Ray荧光光谱仪来测定配合料的均匀度,与熔融法效果基本一致。... 详细信息

比较压片法和熔融法在检测玻璃原料配合料均匀度方面的差异。压片法具有成本效益高且无需额外添加材料的优点,因而可成为检测电子玻璃原料配合料均匀度的优化选择,通过使用X-Ray荧光光谱仪来测定配合料的均匀度,与熔融法效果基本一致。通过研究可以得出结论,压片法在准确度方面同样可以满足生产需求,具有重要的应用价值。

关键词：电子玻璃配合料荧光光谱仪压片法熔融法

电子玻璃用高纯砂中的微量元素多种检测方法的对比

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中国建材科技 2024年第S01期33卷 127-129,133页

作者：丁萍萍樊雨实游丹丹青岛融合光电科技有限公司山东青岛266426

通过实验3种检测高纯砂中微量元素的方法,ICP法、熔融法及熔融法+ICP法均可作为检测高纯砂中微量元素的分析方法。通过RSD及回收率实验对比得出结论,RSDICP法详细信息

通过实验3种检测高纯砂中微量元素的方法,ICP法、熔融法及熔融法+ICP法均可作为检测高纯砂中微量元素的分析方法。通过RSD及回收率实验对比得出结论,RSDICP法

关键词：高纯砂 ICP法熔融法微量元素

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电子玻璃中氧化硼滴定方法的研究

中国建材科技 2024年第S01期33卷 123-126页

作者：游丹丹樊雨实丁萍萍青岛融合光电科技有限公司山东青岛266426

本文研究探索了一种准确、可靠的滴定方法来测定样品中的氧化硼含量的方法,验证了滴定方法的准确性和可靠性,解决了滴定过程中指示剂显色不明显以及变色范围单一的缺点。样品经前处理完成获得含氧化硼组分的溶液,用全自动电位滴定仪经... 详细信息

本文研究探索了一种准确、可靠的滴定方法来测定样品中的氧化硼含量的方法,验证了滴定方法的准确性和可靠性,解决了滴定过程中指示剂显色不明显以及变色范围单一的缺点。样品经前处理完成获得含氧化硼组分的溶液,用全自动电位滴定仪经氢氧化钠标准滴定溶液滴定,得出pH和电势的变化走势,利用pH曲线导数的最大点求得氧化硼含量。用该方法测定标准物质1,标准物质2,测定结果与标准值吻合,且进行7次重复性实验得出硼含量的相对偏差为0.13%-0.39%。该方法简便、快捷,适用于不同硼含量玻璃的快速、准确检测。

关键词：玻璃氧化硼全自动电位滴定仪

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显示器用电子玻璃的检测与制样方法研究

玻璃搪瓷与眼镜 2024年第6期52卷 34-37,33页

作者：樊雨实丁萍萍游丹丹青岛融合光电科技有限公司青岛266426

使用X-Ray荧光光谱仪检测显示用电子玻璃配合料的准确度、重复性和均匀度,比较压片法和熔融法制样对检测数据的影响。结果显示,压片法具有成本效益高且无需额外添加材料的优点,可成为检测显示用电子玻璃原料配合料均匀度的优先选择,其... 详细信息

使用X-Ray荧光光谱仪检测显示用电子玻璃配合料的准确度、重复性和均匀度,比较压片法和熔融法制样对检测数据的影响。结果显示,压片法具有成本效益高且无需额外添加材料的优点,可成为检测显示用电子玻璃原料配合料均匀度的优先选择,其配合料的均匀度与熔融法基本一致,准确度可以满足生产需求,具有应用价值。

关键词：显示电子玻璃配合料荧光光谱仪压片法熔融法

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Analysis of spatial distribution characteristics and driving factors of ethnicminority villages in China using geospatial technology and statistical models

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Journal of Mountain Science 2024年第8期21卷 2770-2789页

作者： SHAO dandan ZOH Kyungjin Interdisciplinary Program in Landscape Architecture Graduate School of Environmental StudiesSeoul National UniversitySeoul 08826Korea Graduate School of Environmental Studies Seoul National UniversitySeoul 08826Korea

This study aims to reveal the spatial structural characteristics of 1,652 Ethnic-Minority Villages(EMV)in China and to analyze the mechanisms driving their spatial *** are a special type of settlement space that preserve a large number of historical traces of the ethnic culture of ancient *** are important carriers of China’s excellent traditional culture and are key to the implementation of rural revitalization *** this study,1652 EMV in China were selected as the research *** Nearest Neighbor Index,kernel density,and spatial autocorrelation index were employed to reveal the spatial structural characteristics of minority *** network models,spatial lag models,and geographical detectors were used to analyze the formation mechanism of spatial heterogeneity in *** results indicate that:(1)EMV exhibit significant spatial differentiation characterized by“single-core with multiple surrounding sub-centers,”“polarization between east and west,”“decreasing quantity from southwest to east coast to northeast to northwest,”and“large dispersion with small agglomeration.”(2)EMV are mainly distributed in areas rich in intangible cultural heritage,with high vegetation coverage and low altitude,far from central cities,and having limited arable land and an underdeveloped economy and transportation,particularly in shaded or riverbank areas.(3)Distance from the nearest river(X3),distance from central cities(X8),national intangible cultural heritage(X9),and NDVI(X10)were the main driving factors affecting the spatial distribution of EMV,whereas elevation(X1)and GDP(X5)had the weakest *** EMV are a relatively unique territorial spatial unit,the identification of their spatial heterogeneity characteristics not only deepens the research content of settlement geography,but also involves the assessment,protection,and development of Minority Villages,which is of great significance for the inheritance and utilization of excellent

关键词： Ethnic-Minority Villages Spatial structure Settlement geography Neural network model Spatial econometric model GeoDetector

Effects of baffle position in serpentine flow channel on the performance of proton exchange membrane fuel cells

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Chinese Journal of Chemical Engineering 2024年第5期69卷 250-262页

作者： Guodong Xia Xiaoya Zhang dandan Ma MOE Key Laboratory of Enhanced Heat Transfer and Energy Conservation Beijing Key Laboratory of Heat Transfer and Energy ConversionBeijing University of TechnologyBeijing 100124China

This study used a three-dimensional numerical model of a proton exchange membrane fuel cell with five types of channels:a smooth channel(Case 1);eight rectangular baffles were arranged in the upstream(Case 2),midstream(Case 3),downstream(Case 4),and the entire cathode flow channel(Case 5)to study the effects of baffle position on mass transport,power density,net power,***,the effects of back pressure and humidity on the voltage were *** showed that compared to smooth channels,the oxygen and water transport facilitation at the diffusion layer-channel interface were added 11.53%-20.60%and 7.81%-9.80%at 1.68 A·cm^(-2)by adding *** closer the baffles were to upstream,the higher the total oxygen flux,but the lower the flux uniformity the worse the water *** oxygen flux of upstream baffles was 8.14%higher than that of downstream baffles,but oxygen flux uniformity decreased by 18.96%at 1.68 A·cm^(-2).The order of water removal and voltage improvement was Case 4>Case 5>Case 3>Case 2>Case *** power of Case 4 was 9.87%higher than that of the smooth *** the Case 4,when the cell worked under low back pressure or high humidity,the voltage increments were *** potential increment for the back pressure of 0 atm was 0.9%higher than that of 2 atm(1 atm=101.325 kPa).The potential increment for the humidity of 100%was 7.89%higher than that of 50%.

关键词： Proton exchange membrane fuel cell Baffle position Mass transfer Net power Uniformity Voltage increment

Formation of Superthin Galaxies in IllustrisTNG

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Research in Astronomy and Astrophysics 2024年第7期24卷 235-248页

作者： Jianhong Hu dandan Xu Cheng Li Department of Astronomy Tsinghua UniversityBeijing 100084China

Superthin galaxies are observed to have stellar disks with extremely small minor-to-major axis *** this work,we investigate the formation of superthin galaxies in the TNG100 *** trace the merger history and investigate the evolution of galaxy properties of a selected sample of superthin galaxies and a control sample of galaxies that share the same joint probability distribution in the stellar-mass and color *** making comparisons between the two galaxy samples,we find that present-day superthin galaxies had similar morphologies as the control sample counterparts at higher redshifts,but have developed extended flat“superthin”morphologies since z~*** this latter evolution stage,superthin galaxies undergo an overwhelmingly higher frequency of prograde mergers(with orbit-spin angleθ_(orb)≤40°).Accordingly the spins of their dark matter halos have grown significantly and become noticeably higher than those of their normal disk *** further results in the buildup of their stellar disks at larger distances much beyond the regimes of normal disk *** also discuss the formation scenario of those superthin galaxies that live in larger dark matter halos as satellite galaxies therein.

关键词： Galaxies formation-Galaxies evolution-Galaxies interactions-Galaxies star formation

Integrated Substrate Gap Waveguides for Millimeter-Wave Antennas（Invited talk）

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Integrated Substrate Gap Waveguides for Millimeter-Wave Ante...