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基于ERA5海洋再分析资料的卫星热红外辐射定标方法精度评估

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遥感学报 2023年第5期27卷 1150-1165页

作者：薛亚楠马灵玲王宁李坤王新鸿韩启金钱永刚李大成中国科学院空天信息创新研究院中国科学院定量遥感信息技术重点实验室北京100094 中国科学院大学光电学院北京100049 中国资源卫星应用中心北京100094 太原理工大学太原030024

卫星红外载荷辐射定标是定量化应用的重要前提,选择合适的辐射定标参考是实现卫星传感器高频次、高精度定标,进而维持全生命周期观测稳定性的保障。再分析资料能够提供全球覆盖、一定空间和时间分辨率的地表及大气数据,已在气候应用中... 详细信息

卫星红外载荷辐射定标是定量化应用的重要前提,选择合适的辐射定标参考是实现卫星传感器高频次、高精度定标,进而维持全生命周期观测稳定性的保障。再分析资料能够提供全球覆盖、一定空间和时间分辨率的地表及大气数据,已在气候应用中展现了重要价值,其作为辐射定标参考的适用性值得研究。本文以欧洲中期天气预报中心ERA5再分析资料为研究对象,首先利用Argo浮标观测海表温度(SST)和Terra-MODIS L2级SST日产品,对ERA5数据集的海洋表皮温度参数(SSTskin)进行验证;其次利用MODIS观测星上亮温值,对使用ERA5 SSTskin和大气廓线数据模拟得到星上亮温值进行验证。结果表明,ERA5 SSTskin与Argo SST的平均偏差在-0.31 K以内,与MODIS SST产品的平均偏差在-0.38 K以内,且与Argo SST的偏差在时间和空间上更为稳定;辐射传输计算结果显示,与星上观测亮温的平均偏差也在-0.38 K以内,且偏差随时间和纬度变化波动较小。最后,本文还探究了风速、大气水汽柱总量、海浪平均高度等气象影响因素与海表温度偏差和星上亮温偏差的相关性,整体看来,在6—16 m/s中等风速,低于7.0 g/cm2水汽柱总量以及0.6—3 m海浪平均高度的条件下,海表温度偏差以及星上亮温偏差较低。研究结果可为再分析资料用于不依赖实测数据的卫星红外载荷绝对辐射定标提供有效支撑。

关键词：再分析资料海表面温度星上亮温辐射定标参考

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新媒体时代谈话类节目主持人身份建构

鞍山师范学院学报 2022年第1期24卷 61-64页

作者：李大成李冬香本溪开放大学辽宁本溪117100 徐州工程学院江苏徐州221018

新媒体时代谈话类节目侧重人际互动,主持人的言语表达与情感流露是决定整个节目成败的关键因素。以网络视频中主持人话语为语料,以陈新仁提出的身份建构理论为框架,分析主持人构建的身份类型,并找出相关身份之间的冲突及相应的话语策略。

关键词：新媒体谈话类节目主持人身份建构身份冲突话语策略

The synthesis,structure and property study of copper（Ⅱ）-[15]-metallacrown-5 lanthanide complexes derived from glycine hydroxamic acid

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The synthesis,structure and property study of copper（Ⅱ）-[...

中国化学会第九届全国无机化学学术会议

作者： Yanxia Meng Hua Yang dacheng li Jianmin Dou Shandong Provincial Key Laboratory of Chemical Energy Storage and Novel Cell Technology School of Chemistry and Chemical EngineeringLiaocheng University

Considerable effort have been dedicate to the formation and performance of metallcrowns（MCs）due to their interesting properties,such as catalytic activity,luminescence,magnetism,recognition of cation,anions and *** hydroxamic acid as ditopic ligand functions with metal ions to form two five-membered fused chelate *** far,only the copper[15]-metallacrown-5 gadolinium and europium complexes from glycine hydroximate ligand have been reported.[1,2]Based on the specific LnⅢ ions possessing a large magnetic moment and a large magnetoanisotropy,two lanthanide-containing copper[15]-metallacrown-5 DyⅢ[15-MCCu Ⅱ（N）（S）-phe HA-5]and HoⅢ[15-MCCu Ⅱ（N）（S）-phe HA-5]behaved single molecule magnet（SMM）behavior.[4]Herein,we used a similar method to synthesize a family of copper[15]-metallacrown-5 lanthanide（Ln=La,Pr,Nd,Sm,Tb,Dy,Ho）*** molecular structure and two-dimensional network structure of[Sm Cu5（Glyha）5（NO3）2（H2O）6]（NO3）·5H2O（1）as shown in fig.1 and *** the structure,five glycine hydroximates（glyha2-）and five copper（Ⅱ）ions form the nearly planar[15]-metallacrown-5 ring with Cu–N–O–Cu linkages formed by the five copper（Ⅱ）ions,the nitrogen and oxygen atoms of the five glycine hydroximate *** ring cavity encapsulates a lanthanide（Ⅲ）***,we are investigating their magnetic properties and luminescence,and the structure-magnetic effect will be discussed in the approaching work.

关键词： Hydroximic acid Metallacrown Magnetic property Luminescence

Synthesis and Crystal Structure of a 12-azaMetallacrown-4 Mn-Tm complex

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Synthesis and Crystal Structure of a 12-azaMetallacrown-4 Mn...

2018年中西部地区无机化学化工学术研讨会

作者： Zhi liu Hua Yang dacheng li Jianmin Dou Shandong Provincial Key Laboratory of Chemical Energy Storage and Novel Cell Technology School of Chemistry and Chemical Engineering Liaocheng University

Azametallacrowns（azaMCs）, a branch of Metallacrowns（MCs）, with the structural feature showing M-N-N repeat units in the ring, also have attrated considerable attention due to their fascinating properties, such as, magnetic, catalysis and bioactivity.[1,2] The syntheses of azaMC usually involved hydrazine, pyrazole and triazole ligands. However, the structural types displayed obvious difference. Based on the previous work,[3] herein, we prepared a 3 d-4 f azaMC through the reaction of 3-（2-oxyphenyl）-5-（pyrazine-1-yl）-1,2,4-triazole ligand（H2 hppt）, Mn（OAc）2·4 H2 O and Tm（NO3）3·6 H2 O with the molecular fomula [Mn2 Tm2（hppt）4（OH）2（OAc）2（DMF）（H2 O）]（Fig. 1）. The complex presents Mn-N-N-Tm-N-N and Mn-O-Tm-O double linkages with the N-N bridge supplied by triazole and O atom provied by OH-or OAc-. The homometallic ions are locate in the opposite possitions and display similar coordinated configuration with Mn ions having six coordination distored octahedral geometry and Tm ions possessing eight coordination distored aquare-antiprismatic geometry. Interesting, the OAc-groups adopt the rare μ3: η2: η1 mode with syn-anti and anti-anti coordination conformations. The cooresponding properties are carried out.

关键词： triazole ligand 3d-4f heterometallic azaMetallacrown,structure and synthesis

The Structure and Magnetic Property of a Mn6 Complex

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The Structure and Magnetic Property of a Mn6 Complex

中国化学会第八届全国配位化学会议

作者： Wei Yang Hua Yang dacheng li Jianmin Dou School of Chemistry and Chemical Engineering and Shandong Provincal Key Laboratory of Chemical Energy Storage and Novel Cell Technology Liaocheng University Institute of BioPharmaccutical Research Liaocheng University

The field of single-molecule magnets(SMMs) have been attempted to probe by chemists for their potential application in high-density data storage,quantum computation and spintronics,[1,2]since the first SMM was reported in 1993.[3]Manganese ion usually has various valence states and six coordination Jahn-Teller effect in *** analysis of magnetic data of such complexes reveals antiferromagnetic,ferromagnetic,SMMs or single-chain magnetic(SCMs) behavior.[4,5]Herein,we successfully synthesized a Mn complex and explored its magnetic properties in *** complex 1 crystallizes in the monoclinic space group P2(l)/c(***).The structure unit is a six nuclear cluster containing four L ligands,six Mn ions,three MeOand one μ-O,one μ-*** Mn ions are further linked together by one μ-O and one μ-*** studies of magnetic property reveal dominant antiferromagnetic *** drop of X T value at 16 K is likely caused by ZFS,Zeeman effect and/or intermolecular interaction.

关键词： Phenolic pyrazoles ligand Multimanganese Structure Magnetic Properties

二维水动力模型在无资料河段水位流量关系分析中的应用

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水力发电 2022年第4期48卷 17-23页

作者：宋雄李大成马黎赵乔中国电建集团贵阳勘测设计研究院有限公司贵州贵阳550081

无论是工程设计还是水文监测,河道设计断面水位流量关系的拟定都十分重要。目前,主要通过低中高水流量监测,结合设计断面大断面测量成果进行拟定。对于一些工程,特别是海外工程,设计河段可能没有任何水文监测资料,同时难以调查到历史洪... 详细信息

无论是工程设计还是水文监测,河道设计断面水位流量关系的拟定都十分重要。目前,主要通过低中高水流量监测,结合设计断面大断面测量成果进行拟定。对于一些工程,特别是海外工程,设计河段可能没有任何水文监测资料,同时难以调查到历史洪水,但工程前期方案设计时,需要尽可能准确地拟定出设计断面的水位流量关系。为此,尝试采用二维水动力学模型分析计算设计断面的水位流量关系,并与传统一维水动力模型计算成果进行了对比。结果表明,二维水动力模型对于水力特征较为复杂的河道更具适应性。

关键词：水位流量关系二维水动力模型复杂水力特征无资料河段分析应用卢阿拉巴河

Synthesis and Structure of a coordination polymer from 15-Metallacrown-5 units and ClO4- linkers

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Synthesis and Structure of a coordination polymer from 15-Me...

中国化学会第八届全国配位化学会议

作者： Heng Xu Hua Yang dacheng li Jianmin Dou Shandong Provincial Key Laboratory of Chemical Energy Storage and Novel Cell Technology School of Chemistry and Chemical Engineering Liaocheng University Institute of BioPharmaceutical Research Liaocheng University

Considerable effort has been devoted to the studies of Metallacrowns(MCs) due to their aesthetically fascinating molecular architectures and diverse non-trivial properties,such as molecular magnets catalysts,sensors,and recognition agents for cations,anions or molecules[1,2].Hydroximic acid ligands with multidonors are the better candidates to prepare the *** is easy for them to coordinate and bridge homo/heterometallic ions to form unexpected complexes with charming structures and interesting ***,we designed the reaction of 2-picolinehydroxamic acid(picHa) with Cu(ClO)·6 H O and Er(ClO)·6 H O.A new heterometallic 3 d-4 f coordination complex {[Er(CH O) Cu(picHA)(ClO)]·(ClO)} was *** asymmetric unit is shown in *** Metallacrown core exhibits a 15-MC-5 structural type and was constructed by five Cu ions and five doubly deprotonated hydroximate *** Er ion is encapsulated in the cavity,achieving the recognition of the *** Cu is five-coordinated,tetragonal pyramid configuration with the equatorial plane coordination atoms from two deprotonated hydroximate ligands and the axial positions occupied by N atoms from py *** ion is seven-coordinated pentagonal bipyramid configuration with the planar coordination atoms from Metallacrown ring five O *** Metallacrown as "second-building blocks" are further linked by the coordinated ClOto form a 2-D coordination polymer(Fig.2)

关键词： 2-Picolinehydroxamic Acid 3d-4f Metallacrown Structure Coordination Polymer

铁水联运车船直取模式下陆域轨道与栈桥轨道“十字”转车盘连接技术研究

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铁道货运 2023年第6期41卷 32-36页

作者：李兵余永金李大成中铁武汉勘察设计院有限公司铁道与公路处湖北武汉430074 中国铁路设计集团有限公司线路站场枢纽设计研究院天津300308

铁水联运中陆域轨道与栈桥轨道的转向连接,传统上是采用曲线连接方式,水中桥墩过多占用河道和宝贵的岸线资源,引起通航和防洪问题。“十字”轨道转车盘是一种新型的铁路轨道转向设备,通过该项设备可以在小空间范围内实现铁路车辆的转向... 详细信息

铁水联运中陆域轨道与栈桥轨道的转向连接,传统上是采用曲线连接方式,水中桥墩过多占用河道和宝贵的岸线资源,引起通航和防洪问题。“十字”轨道转车盘是一种新型的铁路轨道转向设备,通过该项设备可以在小空间范围内实现铁路车辆的转向,且转向效率高,经济性好,节能环保,特别适用于铁水联运车船直取模式下陆域轨道与栈桥轨道的转向连接。通过这种新型转向设备可以避免铁路对河道和岸线资源的占用,降低工程造价,减少施工和建设难度,对铁水联运车船直取模式的发展具有很好的推动作用。

关键词： “十字”轨道转车盘转向设备铁水联运车船直取曲线连接

Synthesis,Structure and Magnetic Properties of a Cage-like Cu6Gd6 Compound

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Synthesis,Structure and Magnetic Properties of a Cage-like C...

中国化学会第八届全国配位化学会议

作者： Bingbing Guo Hua Yang dacheng li Jianmin Dou Shandong Provincial Key Laboratory of Chemical Energy Storage and Novel Cell Technology School of Chemistry and Chemical Engineering Liaocheng University Institute of BioPharmaceutical Research Liaocheng University

The lanthanide-based SMMs are attracting the growing attentions due to the intrinsic strong spin-orbital coupling and magnetic anisotropy of lanthanide(Ⅲ) ions[1].Their promising high anisotropic energy barrier(U) for the magnetization reversal and the blocking temperature(T)play a key role in their potential application in the high-density information storage[2].Based on these considerations,we designed the reaction of 2-hydroxy-3-carboxy-5-chlorobenzaldehyde oxime(H hccbdo) with gadolinium nitrate and copper acetate and obtained a novel dodecanuclear 3 d-4 f complex[Cu Gd(Hhccbdo)(hccbdo)(DMF)(H O)].The coplanar four Gd ions are ligated with carboxyl groups of ligands and form a 16-MC-4 cyclic structure with[Gd-O-C-O]repeating *** 16-MC-4 rings assembled into a rare cage-like *** copper ions are located the outside of the cage(Fig.1).Magnetic susceptibility reveals the ferromagnetic coupling between the metal ions of complex(Fig.2 a),and further AC magnetic data indicates the slow magnetic relaxation,a typical of single-molecule magnets behavior(Fig.2 b).

关键词： 2-Hydroxy-3-Carboxy-5-Chloro-Benzaldehyde Oxime 3d-4f Complex Slow Magnetic Relaxation