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Consistency of Tropospheric Water Vapor between Reanalyses and Himawari-8/AHI Measurements over East Asia

Advances in Atmospheric Sciences 2024年第1期41卷 19-38页

作者： di di Jun LI Yunheng XUE Min MIN Bo LI Zhenglong LI Collaborative Innovation Center on Forecast and Evaluation of Meteorological disasters Nanjing University of Information Science and TechnologyNanjing 210044China Key Laboratory for Aerosol-Cloud-Precipitation China Meteorological AdministrationSchool of Atmospheric PhysicsNanjing University of Information Science and TechnologyNanjing 210044China FYSIC National Satellite Meteorological CenterChina Meteorological AdministrationBeijing 100081China Chengdu University of Information Science and Technology Chengdu 610225China School of Atmospheric Sciences and Guangdong Province Key laboratory for Climate Change and Natural disaster Studies Sun Yat-sen University and Southern Laboratory of Ocean Science and EngineeringZhuhai 519082China Cooperative Institute for Meteorological Satellite Studies University of Wisconsin–MadisonMadison WI 53706WisconsinUSA Wuxi University Wuxi 214105China

High spatiotemporal resolution radiances from the advanced imagers onboard the new generation of geostationary weather satellites provide a unique opportunity to evaluate the abilities of various reanalysis datasets to depict multilayer tropospheric water vapor(WV),thereby enhancing our understanding of the deficiencies of WV in reanalysis *** on daily measurements from the Advanced Himawari Imager(AHI)onboard the Himawari-8 satellite in 2016,the bias features of multilayer WV from six reanalysis datasets over East Asia are thoroughly *** assessments show that wet biases exist in the upper troposphere in all six reanalysis datasets;in particular,these biases are much larger in ***,we find better depictions of WV in the middle troposphere than in the upper *** accuracy of WV in the ERA5 dataset is the highest,in terms of the bias magnitude,dispersion,and pattern *** characteristics of the WV bias over the Tibetan Plateau are significantly different from those over other parts of East *** addition,the reanalysis datasets all capture the shift of the subtropical high very well,with ERA5 performing better overall.

关键词： AHI reanalysis dataset multilayer water vapor assessment radiative transfer model

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Streamflow abrupt change and the driving factors in glacierized basins of Tarim Basin,Northwest China

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Advances in Climate Change Research 2024年第1期15卷 75-89页

作者： Cheng-De YANG Min XU Shi-Chang KANG Cong-Sheng FU Wei ZHANG di-di HU State Key Laboratory of Cryospheric Science Northwest Institute of Eco-Environment and ResourcesChinese Academy of SciencesLanzhou 730000China University of Chinese Academy of Sciences Beijing 100049China Key Laboratory of Watershed Geographic Sciences Nanjing Institute of Geography and LimnologyChinese Academy of SciencesNanjing 210000China

A climate transition towards warm-wet conditions in Northwest China has drawn much *** continuous climate change and universal glacier degradation,increasing water-related hazards and vulnerability have become one of the important problems facing the Tarim ***,the impacts of the climate transition on streamflow abrupt change and extreme hydrological events were less discussed,especially in glacial *** the present study,the discharge datasets in four glacial basins of Tarim Basin from 1979 to 2018 were constructed using the GRU-GSWAT+model *** differences in streamflow characteristics,the shift of hydrological extreme pattern,and potential changes of the controlling factors before and after the abrupt changes were *** results indicated that the abrupt change point(ACP)in streamflow occurred in 2000 in the Qarqan River Basin,2002 in the Weigan River Basin,and 1994 in the Aksu River Basin and the Yarkant River Basin.A general decrease in streamflow before the ACP has shifted to a notable upward trend in the Qarqan River Basin and the Aksu River Basin,while minor upward fluctuations were observed in other ***,the hydrological characteristics in extreme events vary dramatically before and after the ACPs,characterized by a pronouncing shift from drought-dominant pattern to wet events dominated *** driven climate factors have been altered after the ACPs with notable spatial heterogeneity,in which temperature remained as the dominant role in meltwater-dominated basins while the influence of precipitation has increased after the ACPs,whereas the sensitivity of temperature on streamflow change has been enhanced in basins dominated by precipitation such as the Qarqan River *** to the evident warming-wetting trend and glacier compensation effect,both the inter-annual and intra-annual streamflow fluctuations can be efficiently smoothed in basins with a high glacier area ratio(GAR).These findings provide a

关键词： Abrupt change Streamflow Hybrid model Tarim Basin Glacier

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Quantitative Applications of Weather Satellite Data for Nowcasting:Progress and Challenges

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Journal of Meteorological Research 2024年第3期38卷 399-413页

作者： Jun LI Jing ZHENG Bo LI Min MIN Yanan LIU Chian-Yi LIU Zhenglong LI WPaul MENZEL Timothy J.SCHMIT John L.CINTINEO Scott LINDSTROM Scott BACHMEIER Yunheng XUE Yayu MA di di Han LIN Innovation Centre for Fengyun Meteorological Satellite(FYSIC) National Satellite Meteorological CentreChina Meteorological AdministrationBeijing100081China School of Atmospheric Sciences and Guangdong Province Key Laboratory for Climate Change and Natural disaster Studies Sun Yat-sen University and Southern Laboratory of Ocean Science and EngineeringZhuhai519082China Key Laboratory of Geographic Information Science(Ministry of Education) East China Normal UniversityShanghai200241China Research Center for Environmental Changes Academia SinicaTaipei11529China Cooperative Institute for Meteorological Satellite Studies University of Wisconsin-MadisonMadisonWI53706USA Sensors and Calibration Branch STAR/NESDISMadisonWI53706USA Wuxi University Wuxi214105China School of Computer Science Chengdu University of Information TechnologyChengdu610225China Collaborative Innovation Center on Forecast and Evaluation of Meteorological disasters Nanjing University of Information Science&TechnologyNanjing210044China Key Laboratory of Spatial Data Mining and Information Sharing of Ministry of Education National and Local Joint Engineering Research Center of Satellite Geospatial Information TechnologyFuzhou UniversityFuzhou350108China

Monitoring and predicting highly localized weather events over a very short-term period,typically ranging from minutes to a few hours,are very important for decision makers and public *** these events usually relies on radar observations through monitoring and *** advanced high-resolution imaging and sounding observations from weather satellites,nowcasting can be enhanced by combining radar,satellite,and other data,while quantitative applications of those data for nowcasting are advanced through using machine learning *** applications include monitoring the location,impact area,intensity,water vapor,atmospheric instability,precipitation,physical properties,and optical properties of the severe storm at different stages(pre-convection,initiation,development,and decaying),identification of storm types(wind,snow,hail,etc.),and predicting the occurrence and evolution of the *** observations can provide information on the environmental characteristics in the preconvection stage and are very useful for situational awareness and storm *** paper provides an overview of recent progress on quantitative applications of satellite data in nowcasting and its challenges,and future perspectives are also addressed and discussed.

关键词： weather satellite quantitative applications nowcasting pre-convection

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New Fusion Approach of Spatial and Channel Attention for Semantic Segmentation of Very High Spatial Resolution Remote Sensing Images

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Open Journal of Applied Sciences 2024年第2期14卷 288-319页

作者： Armand Kodjo Atiampo Gokou Hervé Fabrice diédié Unité de Recherche et d’Expertise du Numerique (UREN) Université Virtuelle de Céte d’Ivoire Abidjan Ivory Coast Laboratoire de Mathématiques et Informatique Université Peleforo Gon Coulibaly Korhogo Ivory Coast

The semantic segmentation of very high spatial resolution remote sensing images is difficult due to the complexity of interpreting the interactions between the objects in the scene. Indeed, effective segmentation requires considering spatial local context and long-term dependencies. To address this problem, the proposed approach is inspired by the MAC-UNet network which is an extension of U-Net, densely connected combined with channel attention. The advantages of this solution are as follows: 4) The new model introduces a new attention called propagate attention to build an attention-based encoder. 2) The fusion of multi-scale information is achieved by a weighted linear combination of the attentions whose coefficients are learned during the training phase. 3) Introducing in the decoder, the Spatial-Channel-Global-Local block which is an attention layer that uniquely combines channel attention and spatial attention locally and globally. The performances of the model are evaluated on 2 datasets WHDLD and DLRSD and show results of mean intersection over union (mIoU) index in progress between 1.54% and 10.47% for DLRSD and between 1.04% and 4.37% for WHDLD compared with the most efficient algorithms with attention mechanisms like MAU-Net and transformers like TMNet.

关键词： Spatial-Channel Attention Super-Token Segmentation Self-Attention Vision Transformer

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The Anticancer Potential of Quassinoids-A Mini-Review

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Engineering 2024年第7期38卷 27-38页

作者： Cai Lu Si-Nan Lu di di Wei-Wei Tao Lu Fan Jin-Ao Duan Ming Zhao Chun-Tao Che Jiangsu Collaborative Innovation Center of Chinese Medicinal Resource Industrialization Nanjing University of Chinese MedicineNanjing 210023China National and Local Collaborative Engineering Center of Chinese Medicinal Resource Industrialization and Formulae Innovative Medicine Nanjing University of Chinese MedicineNanjing 210023China School of Chinese Medicine&School of Integrated Chinese and Western Medicine Nanjing University of Chinese MedicineNanjing 210023China School of Medicine&Holistic Integrative Medicine Nanjing University of Chinese MedicineNanjing 210023China Department of Pharmaceutical Sciences College of PharmacyUniversity of Illinois ChicagoChicagoIL 60612USA

The anticancer potential of quassinoids has attracted a great deal of attention for decades,and scientific data revealing their possible applications in cancer management are continuously increasing in the *** from the potent cytotoxic and antitumor properties of these degraded triterpenes,several quassinoids have exhibited synergistic effects with anticancer *** article provides an overview of the potential anticancer properties of quassinoids,including their cytotoxic and antitumor activities,mechanisms of action,safety evaluation,and potential benefits in combination with anticancer drugs.

关键词： Quassinoid Anticancer potential Antiproliferative mechanism Safety evaluation Synergistical combination with anticancer drugs

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Hexavalent Chromium Cr (VI) Removal from Water by Mango Kernel Powder

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Journal of Materials Science and Chemical Engineering 2024年第1期12卷 84-103页

作者： Amadou Sarr Gning Cheikh Gaye Antoine Blaise Kama Pape Abdoulaye diaw diène diégane Thiare Modou Fall Laboratoire de Chimie Physique Organique et d’Analyses Environnementales (LCPOAE) Université Cheikh Anta Diop Dakar Sénégal Equipe Chimie des Matériaux Inorganique et Organique (ECMIO) Université Alioune Diop Bambey Sénégal Equipe des Matériaux Electrochimie et Photochimie Analytiques (EMEPA) Université Alioune Diop Bambey Sénégal Laboratoire de Photochimie et d’Analyse (LPA) Université Cheikh Anta Diop Dakar Sénégal

Metal trace elements (MTE) are among the most harmful micropollutants of natural waters. Eliminating them helps improve the quality and safety of drinking water and protect human health. In this work, we used mango kernel powder (MKP) as bioadsorbent material for removal of Cr (VI) from water. Uv-visible spectroscopy was used to monitor and quantify Cr (VI) during processing using the Beer-Lambert formula. Some parameters such as pH, mango powder, mass and contact time were optimized to determine adsorption capacity and chromium removal rate. Adsorption kinetics, equilibrium, isotherms and thermodynamic parameters such as ΔG˚, ΔH˚, and ΔS˚, as well as FTIR were studied to better understand the Cr (VI) removal process by MKP. The adsorption capacity reached 94.87 mg/g, for an optimal contact time of 30 min at 298 K. The obtained results are in accordance with a pseudo-second order Freundlich adsorption isotherm model. Finally FTIR was used to monitor the evolution of absorption bands, while Scanning Electron Microscopy (SEM) and Energy dispersive X-ray Spectroscopy (EDS) were used to evaluate surface properties and morphology of the adsorbent.

关键词： Adsorption Chromium Mango Kernel Powder Spectroscopy Analysis Water Treatment

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单因素结合Box-Benhnken响应曲面法优化载青蒿素聚乳酸-羟基乙酸共聚物纳米粒制备工艺

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天然产物研究与开发 2024年第9期36卷 1592-1599,1572页

作者：胡迪迪薛昊金旭东李宛俞徐湘迪陈靖扬州大学医学院(转化医学研究院) 扬州225001 深圳大学医学部生物医学工程学院深圳518000 江苏省中西医结合老年病防治重点实验室扬州225001

本研究优化包载青蒿素(artemisinin,ART)聚乳酸-羟基乙酸共聚物(poly(lactic-co-glycolic acid),PLGA)纳米粒(PLGA-ART-NPs)的最优工艺。首先采用乳化-溶剂法制备纳米粒,以单因素实验确定乳化剂种类(聚乙烯醇、吐温80、泊洛沙姆)、乳化... 详细信息

本研究优化包载青蒿素(artemisinin,ART)聚乳酸-羟基乙酸共聚物(poly(lactic-co-glycolic acid),PLGA)纳米粒(PLGA-ART-NPs)的最优工艺。首先采用乳化-溶剂法制备纳米粒,以单因素实验确定乳化剂种类(聚乙烯醇、吐温80、泊洛沙姆)、乳化剂浓度、水-油两相比例及载体-药物比例对粒径、载药量、包封率的影响;以载药量为评价指标,通过Box-Benhnken响应面法,进一步优化PLGA-ART-NPs制备工艺。结果表明聚乙烯醇乳化效果最好,以乳化剂浓度、水-油两相比例、载体-药物比例为影响因素,最优处方确定为:乳化剂浓度为0.017 g/mL,水-油两相比例为18∶1(V/V),载体-药物比例为10∶1(W/W)。以最优处方制备的纳米粒载药量为(4.43±0.22)%,zeta电位为-28.28±2.17 mV,表明本文优化后的处方工艺条件稳定,重复性良好,可行性高,制得的纳米溶液稳定性良好。

关键词：聚乳酸-羟基乙酸共聚物青蒿素纳米粒响应曲面法单因素分析乳化-溶剂挥发法

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玉米对氮素形态的反应及机制研究进展

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植物营养与肥料学报 2024年第5期30卷 1020-1031页

作者：张迪迪陈哲刘金华杨靖民吉林农业大学资源与环境学院/农业资源与环境国家级教学示范中心/秸秆综合利用与黑土地保护教育部重点实验室/吉林省商品粮基地土壤资源可持续利用重点实验室吉林长春138110

【目的】硝态氮(NO_(3)^(−)-N)和铵态氮(NH_(4)^(+)-N)是植物从土壤中吸收的两种主要无机氮形态。玉米属于典型的旱地作物,通常认为NO_(3)^(−)-N是其主要的氮素吸收形态。然而,也有研究表明,与供应NO_(3)^(−)-N相比,供应NH_(4)^(+)-N更... 详细信息

【目的】硝态氮(NO_(3)^(−)-N)和铵态氮(NH_(4)^(+)-N)是植物从土壤中吸收的两种主要无机氮形态。玉米属于典型的旱地作物,通常认为NO_(3)^(−)-N是其主要的氮素吸收形态。然而,也有研究表明,与供应NO_(3)^(−)-N相比,供应NH_(4)^(+)-N更有利于玉米的生长。因此,目前为止对于玉米氮源偏好并无一致的结论。本文总结了不同环境下玉米的氮源偏好表现,以及其控制NO_(3)^(−)-N和NH_(4)^(+)-N吸收的基因家族。阐明玉米根系发育、碳氮代谢、光合作用、矿质元素吸收和抗逆性等生理过程对两种氮素形态的响应,以期为玉米的氮素高效利用与氮肥优化管理提供指导。【主要进展】玉米氮源偏好受外界环境的影响,土壤pH被认为是主要的影响因素之一。玉米在酸性环境下喜NO_(3)^(−)-N,碱性环境下更喜NH_(4)^(+)-N。相比单一氮素形态,适宜的铵硝配比更有利于玉米氮素的吸收和产量的提高。在玉米基因组中,负责编码高亲和力硝酸盐转运系统基因NRT2有4个,低亲和力硝酸盐转运系统基因NPF有79个,高亲和力铵盐转运系统基因AMT有8个,低亲和力铵盐转运系统基因AMF1有两个。NO_(3)^(−)-N和NH_(4)^(+)-N不仅作为养分资源,同时作为信号因子参与调控玉米的根系发育、碳氮代谢、光合作用、矿质元素吸收及抗逆性。【展望】为进一步提高玉米氮肥利用效率,明确氮素形态影响玉米生长发育和生理过程的机制,需要在以下几方面重点展开研究:深入挖掘玉米吸收、转运NO_(3)^(−)-N和NH_(4)^(+)-N的分子机制;探索NH_(4)^(+)-N与NO_(3)^(−)-N混合施用促进玉米生长的机理;开展氮素形态对玉米生长及产量影响的大田验证试验。

关键词：玉米铵态氮硝态氮生长发育产量生理过程

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蒲风诗歌大众化的“口语”实践

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岭南文史 2024年第4期 89-95页

作者：张荻荻中山大学马克思主义学院

在20世纪二三十年代的左翼文化运动中,广东文化界人才辈出。其中,粤籍诗人蒲风以口语化的新诗创作实践推动了革命文艺大众化发展。一方面,他充分挖掘口语真实、亲切、灵动的特征,运用人民群众日常生活中的言语创作出许多通俗易懂的诗作... 详细信息

在20世纪二三十年代的左翼文化运动中,广东文化界人才辈出。其中,粤籍诗人蒲风以口语化的新诗创作实践推动了革命文艺大众化发展。一方面,他充分挖掘口语真实、亲切、灵动的特征,运用人民群众日常生活中的言语创作出许多通俗易懂的诗作,并积极对新诗中的方言、声音元素开展探索;另一方面,他还尝试从民间传统中汲取养分,如在诗中融入叙事手法,丰富了新诗的表现形式。蒲风以口语为主的大众化诗学实践,不仅为红色文艺巩固意识形态领导权、构建有效话语体系、增强传播力影响力提供了宝贵经验,同时也有助于重新审视社会主义文艺人民性的本质特征,对新时代红色文艺坚守初心、服务于民提供了有益的借鉴。

关键词：文艺大众化蒲风新诗口语

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以诗意为旨归——论作为诗人的汪曾祺

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海南师范大学学报（社会科学版） 2024年第1期37卷 74-83页

作者：张荻荻中山大学马克思主义学院广东广州510275

诗在汪曾祺的艺术生命中占据着重要位置。在自述中,汪曾祺的文学创作是从诗歌起步的。20世纪40年代,汪曾祺的新诗创作多种风格并存,除了自称“有点朦胧”、多受象征主义影响的现代主义风格外,还有平实通俗的现实主义风格,以及重抒情的... 详细信息

诗在汪曾祺的艺术生命中占据着重要位置。在自述中,汪曾祺的文学创作是从诗歌起步的。20世纪40年代,汪曾祺的新诗创作多种风格并存,除了自称“有点朦胧”、多受象征主义影响的现代主义风格外,还有平实通俗的现实主义风格,以及重抒情的浪漫主义风格。这些诗融入了汪曾祺个体化和私密化的生命体验,展现了被小说、散文盛名所遮蔽的诗情和才气,同时富有试验特征的“少作”也为他走向成熟奠定了基础。此外,诗歌之于汪曾祺,不只是意味着文学生涯的起点,更重要的是感受和思考的起点,他不仅将诗意视作贯穿一生的追求,并且将诗歌的理念和技巧融入小说创作,使小说呈现出“向诗倾斜”的特征,积极推动了小说体式的多元化发展。

关键词：汪曾祺诗人新诗创作诗化小说

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