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Spatio-Temporal Characteristics of Heavy Precipitation Forecasts from ECMWF in Eastern China

Journal of Tropical Meteorology 2024年第1期30卷 29-41页

作者：徐同谭燕顾问 Shanghai Typhoon Institute and Key Laboratory of Numerical Modeling for Tropical Cyclone of China Meteorological AdministrationShanghai 200030 China State Key Laboratory of Severe Weather Chinese Academy of Meteorological SciencesBeijing 100080 China Shanghai Ecological Forecasting and Remote Sensing Center Shanghai 200030 China

This study examines the spatio-temporal characteristics of heavy precipitation forecasts in eastern China from the European Centre for Medium-Range Weather Forecasts(ECMWF) using the time-domain version of the Method for Object-based Diagnostic Evaluation(MODE-TD). A total of 23 heavy rainfall cases occurring between 2018 and 2021 are selected for analysis. Using Typhoon “Rumbia” as a case study, the paper illustrates how the MODE-TD method assesses the overall simulation capability of models for the life history of precipitation systems. The results of multiple tests with different parameter configurations reveal that the model underestimates the number of objects’ forecasted precipitation tracks, particularly at smaller radii. Additionally, the analysis based on centroid offset and area ratio tests for different classified precipitation objects indicates that the model performs better in predicting large-area, fast-moving, and longlifespan precipitation objects. Conversely, it tends to have less accurate predictions for small-area, slow-moving, and shortlifespan precipitation objects. In terms of temporal characteristics, the model overestimates the forecasted movement speed for precipitation objects with small-area, slow movement, or both long and short lifespans while underestimating it for precipitation with fast movement. In terms of temporal characteristics, the model tends to overestimate the forecasted movement speed for precipitation objects with small-area, slow movement, or both long and short lifespans while underestimating it for precipitation with fast movement. Overall, the model provides more accurate predictions for the duration and dissipation of precipitation objects with large-area or long-lifespan(such as typhoon precipitation) while having large prediction errors for precipitation objects with small-area or short-lifespan. Furthermore, the model’s simulation results regarding the generation of precipitation objects show that it performs relatively well in simulating the generation of large-

关键词： MODE-TD ECMWF heavy precipitation Eastern China

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环化核苷酸合成酶-干扰素刺激因子信号通路在呼吸系统疾病中的研究进展

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中华结核和呼吸杂志 2024年第3期47卷 252-258页

作者：钱军航叶亮谭焰南京医科大学附属南京医院(南京市第一医院)呼吸与危重症医学科南京210006

环化核苷酸合成酶(cGAS)是一种DNA感受器,通过环鸟苷酸-腺苷酸(cGAMP)将信号传递给干扰素刺激因子(STING),诱导下游通路产生一系列免疫及炎症反应。近年的研究表明,cGAS-STING信号通路在肺部感染性疾病、肺癌、特发性肺纤维化、慢性阻... 详细信息

环化核苷酸合成酶(cGAS)是一种DNA感受器,通过环鸟苷酸-腺苷酸(cGAMP)将信号传递给干扰素刺激因子(STING),诱导下游通路产生一系列免疫及炎症反应。近年的研究表明,cGAS-STING信号通路在肺部感染性疾病、肺癌、特发性肺纤维化、慢性阻塞性肺疾病、支气管哮喘和急性肺损伤等多种呼吸系统疾病的发生发展中发挥重要作用,为呼吸系统疾病的诊断和治疗提供了新的靶点。本文综述了cGAS-STING信号通路及其在呼吸系统疾病研究中的最新进展。

关键词：特发性肺纤维化呼吸系统疾病肺部感染性疾病慢性阻塞性肺疾病支气管哮喘刺激因子信号通路环鸟苷酸

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Preparation and Microscopic Characterization of Asphalt Modified by Ethylene Metal-free Phthalocyanine-dispersed Graphene

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Journal of Wuhan University of Technology(Materials Science) 2022年第1期37卷 66-75页

作者：黄刚 HUANG Hao ZHANG Xia HE Junxi ZHOU Chao tan yan FENG Manman LüChuncheng National and Local Joint Engineering Laboratory of Traffic Civil Engineering Materials Chongqing Jiaotong UniversityChongqing 400074China Xinjiang Transportation Planning SurveyDesign and Research Institute Co.LtdWulumuqi 830006China China Merchants Chongqing Testing Center for Highway Engineering Co. LtdChongqing 400074China

Graphene-modified asphalt(GMA)for road application was prepared via using metal-free phthalocyanine-dispersed to modify an SK-70#base asphalt with graphene.The preparation parameters are as follows:the content of graphene is 0.26%based on the mass percentage of absolute ethanol,the content of nonmetal phthalocyanine is 190%based on the mass percentage of graphene,and then the GMA is prepared via unique high-speed shearing with continuing to ventilate nitrogen,which can prevent the aging of modified asphalt in the high-speed shearing process,and effectively evaluate the modifier.The penetration,softening point,force ductility,and fracture energy of GMA were significantly improved based on the base asphalt.Thus,the incorporation of graphene could enhance the base asphalt’s high-and low-temperature stability.The modification mechanism was researched via metallographic microscopy,computed tomography(CT),Fourier transform infrared spectroscopy(FTIR),and atomic force microscopy(AFM).Adsorption and physical dispersion of the asphaltenes and resins in the phthalocyanine-graphene system were confirmed.

关键词： ethylene metal-free phthalocyanine GMA performance dispersion and adsorption asphaltene resin

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Preparation and Characterization of Glass-Ceramic Basalt Fiber

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Journal of Harbin Institute of Technology(New Series) 2022年第6期29卷 27-33页

作者： Lida Luo tan yan Jin Liu Linfeng Ding Qingwei Wang Wan Jiang State Key Laboratories for Modification of Chemical Fiber and Polymer Materials Donghua UniversityShanghai 201620China Engineering Research Center of Advanced Glass Manufacturing Technology Ministry of EducationDonghua UniversityShanghai 201620China Institute of Functional Materials Donghua UniversityShanghai 201620China

Basalt fiber(BF)is widely applied in the construction industry to improve the mechanical properties of construction materials.Recent studies show that BF has the potential to further enhance its performance via a crystallization approach.In this work,the glass-ceramic basalt fibers(GCBFs)were prepared through nucleation and crystallization treatments according to the crystallization kinetics calculations.Results from XRD and SEM show that GCBFs have main crystalline phases of Diopside and Augite reach crystallinity of around 46%±10%.In particular,the GCBFs sample with the largest mean crystal size maintains the lowest tensile strength of~197 MPa(compared with the pristine BFs of~737 MPa).Moreover,the weight loss and ion dissolution of GCBFs were explored in seawater environments and it was investigated that,GCBFs have better anti-seawater corrosion than the pristine BFs and have the potential to apply in the marine industry.

关键词： glass-ceramic basalt fiber tensile strength crystallization seawater environment

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无需精确初始误差的纯反馈系统实用预设时间保性能控制设计

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系统科学与数学 2024年第1期44卷 45-59页

作者：谭燕吴刘仓昆明理工大学理学院云南650500

暂态行为、稳态精度、调节时间和收敛速率是评价控制系统闭环性能的四个关键指标.文章针对非匹配的不确定纯反馈非线性系统,提出了一种同时满足以上四个指标的跟踪控制设计方案.该方案通过设定性能函数来保证系统输出信号始终保持在由... 详细信息

暂态行为、稳态精度、调节时间和收敛速率是评价控制系统闭环性能的四个关键指标.文章针对非匹配的不确定纯反馈非线性系统,提出了一种同时满足以上四个指标的跟踪控制设计方案.该方案通过设定性能函数来保证系统输出信号始终保持在由该函数边界形成的包络范围内.同时,在一种新颖的误差转换机制控制下,闭环系统的稳态精度和调节时间可以被预先设定.文章使用神经网络来逼近完全未知的非线性函数,其中神经网络的权值可以通过自适应律在线更新.另外,文章在自适应律中加入σ-修正项以避免估计参数发生漂移现象.最后,仿真结果验证了所提控制方法的有效性和在控制性能上的优越性.

关键词：自适应控制径向基神经网络纯反馈系统非线性系统

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风险叠加背景下我国粮食安全面临的挑战及对策

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华南农业大学学报（社会科学版） 2024年第2期23卷 1-9页

作者：谭砚文杨世龙华南农业大学经济管理学院广东广州510642

受地缘冲突、极端气候、贸易保护主义日益盛行等因素影响,全球粮食市场不稳定性显著增强。一方面,印度等主要粮食出口国陆续实施粮食出口限制政策以保障本国粮食安全;另一方面,厄尔尼诺现象下极端天气频发,叠加地缘政治经济冲突,引发新... 详细信息

受地缘冲突、极端气候、贸易保护主义日益盛行等因素影响,全球粮食市场不稳定性显著增强。一方面,印度等主要粮食出口国陆续实施粮食出口限制政策以保障本国粮食安全;另一方面,厄尔尼诺现象下极端天气频发,叠加地缘政治经济冲突,引发新一轮国际粮价大幅上涨,冲击我国粮食进口国际供应链。为保障我国的粮食安全,应进一步优化饲料粮生产结构,有效降低粮食产后损失率,积极参与全球粮食安全治理,推动中国粮企布局全球粮食产业链供应链,并加大期货市场风险防范力度。

关键词：粮食安全国际供应链生产结构风险防范

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Layer by Layer Self-assembly Fiber-based Flexible Electrochemical Transistor

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Journal of Wuhan University of Technology(Materials Science) 2024年第4期39卷 937-944页

作者：谭艳 HAO Panpan HE yang ZHU Rufeng 王跃丹 School of Biomedical Engineering Hubei University of MedicineShiyan 442000China Key Laboratory of Textile Fiber and Products Ministry of EducationWuhan Textile UniversityWuhan 430200China

Poly(3,4-ethylenedioxyethiophene)-polystyrene sulfonic acid(PEDOT:PSS)/polyallyl dimethyl ammonium chloride modified reduced graphene oxide(PDDA-rGO)was layer by layer self-assembled on the cotton fiber.The surface morphology and electric property was investigated.The results confirmed the dense membrane of PEDOT:PSS and the lamellar structure of PDDA-rGO on the fibers.It has excellent electrical conductivity and mechanical properties.The fiber based electrochemical transistor(FECTs)prepared by the composite conductive fiber has a maximum output current of 8.7 mA,a transconductance peak of 10 mS,an on time of 1.37 s,an off time of 1.6 s and excellent switching stability.Most importantly,the devices by layer by layer self-assembly technology opens a path for the true integration of organic electronics with traditional textile technologies and materials,laying the foundation for their later widespread application.

关键词： layer by layer self-assembly fiber based organic electrochemical transistor reduced graphene oxide PEDOT:PSS

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无机增殖剂对PE/ECC力学、抗氯离子渗透及自愈合性能的影响

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复合材料学报 2024年第2期41卷 937-951页

作者：谭燕龙雄余江滔赵犇湖北工业大学土木建筑与环境学院武汉430068 同济大学土木工程学院上海200092

为研究无机增殖剂(CCCA)对聚乙烯(PE)纤维增强高延性水泥基复合材料(ECC)力学、抗氯离子渗透及自愈合性能的影响,以PE/ECC为对照组,分别掺入不同质量分数的CCCA(2wt%、4wt%、6wt%、8wt%、10wt%),通过抗压、抗折、抗拉、电通量法及预加... 详细信息

为研究无机增殖剂(CCCA)对聚乙烯(PE)纤维增强高延性水泥基复合材料(ECC)力学、抗氯离子渗透及自愈合性能的影响,以PE/ECC为对照组,分别掺入不同质量分数的CCCA(2wt%、4wt%、6wt%、8wt%、10wt%),通过抗压、抗折、抗拉、电通量法及预加应变损伤法对PE/ECC力学、抗氯离子渗透及自愈合性能进行研究,并利用XRD、SEM-EDS对其自愈合产物进行物相成分、微观形貌及元素组成分析。结果表明:随着CCCA掺量的增加,PE/ECC力学和抗氯离子渗透性能呈先增后减趋势,当CCCA掺量为4wt%时,CCCA对PE/ECC力学和抗氯离子渗透性能整体提升最为明显,抗压、抗折、极限抗拉强度分别提升了55.5%、10.8%、79.4%,极限拉应变变化不大,电通量下降了38.6%。自愈合试验表明,掺入CCCA后,PE/ECC抗拉强度和应变能的恢复率有明显提升,自愈合性能得到了增强。当预损伤应变为0.5%时,掺CCCA的PE/ECC试件抗拉强度和应变能在养护84天后均高于原始基体,较原始基体分别提高10.41%和2.83%。未掺CCCA的PE/ECC试件在3种应变损伤下的抗拉强度和应变能均低于原始基体。XRD和SEMEDS结果显示,掺CCCA的PE/ECC水化产物中CaCO_(3)、水化硅酸钙(C-S-H)、钙矾石(AFt)衍射峰值强度有所增长,自愈合产物主要是C-S-H晶体,且掺CCCA的PE/ECC中分布更密集。

关键词：无机增殖剂水泥基复合材料抗氯离子渗透性能自愈合微观形貌

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The prognostic impact of traditional Chinese medicine monomers on tumor-associated macrophages in non-small cell lung cancer

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Chinese Journal of Natural Medicines 2019年第10期17卷 729-737页

作者： WAN Liang-Qin tan yan JIANG Miao HUA Qian School of Acupuncture-Moxibustion and Tuina Beijing University of Chinese MedicineBeijing 100029China Dongzhimen Hospital Beijing University of Chinese MedicineBeijing 100029China

Non-small cell lung cancer(NSCLC) accounts for 80%-85% of all lung malignancies and good diagnosis and prognosis of NSCLC are critical to the increase of its survival rate. Tumor-associated macrophages(TAM) abundantly present in numerous cancer types, and the role of TAMs in tumor biology and their prognostic value in cancer become major topics of interest. After various stimulations in the tumor microenvironment, TAMs develop into a M1(tumor-inhibitory) phenotype or M2(tumor-promoting) phenotype. Recent studies show that traditional Chinese medicine(TCM) monomers have markedly inhibitory actions for NSCLC through M1/M2 modulation. Due to the TCM monomers mainly covered five categories, i.e. terpenoids, flavonoids, polysaccharides, natural polyphenols, and alkaloids. Thus, we will discuss the regulation of TCM monomers on TAM involve in these five parts in this review. In addition, the potential role of TAMs as therapeutic targets will be discussed.

关键词： Lung cancer Tumor microenvironment Tumor-associated macrophages Traditional Chinese medicine (TCM) monomer Immunotherapy

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磁敏感加权成像在脑胶质瘤中的应用进展

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磁共振成像 2024年第6期15卷 133-137页

作者：于旭东谭艳山西医科大学医学影像学院太原030001 山西医科大学第一医院影像科太原030001

脑胶质瘤是中枢神经系统最常见的恶性肿瘤,其鉴别诊断、术前病理分级、基因分型、术前规划、术后疗效评估对实施个体化治疗具有重要意义。磁敏感加权成像(susceptibility weighted imaging,SWI)是利用不同组织间磁敏感差异成像的技术,... 详细信息

脑胶质瘤是中枢神经系统最常见的恶性肿瘤,其鉴别诊断、术前病理分级、基因分型、术前规划、术后疗效评估对实施个体化治疗具有重要意义。磁敏感加权成像(susceptibility weighted imaging,SWI)是利用不同组织间磁敏感差异成像的技术,能够清楚显示脑胶质瘤内引流静脉及出血产物。本综述介绍了SWI的基本技术原理,以及SWI在脑胶质瘤的诊断、治疗和影像组学方面的应用和研究进展,将为脑胶质瘤的诊断、治疗以及预后评估等提供更多的参考依据。

关键词：脑胶质瘤磁敏感加权成像磁共振成像影像组学肿瘤内磁敏感信号

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