检索结果-南通市图书馆

Interdecadal Change of the Relationship between Early Summer Precipitation over Northeast China and Spring Land Surface Thermal Anomalies in West Asia

在线全文

学校读者我要写书评

暂无评论

Journal of Meteorological Research 2024年第4期38卷 720-732页

作者： Hongjun SUN Haishan CHEN xinguan du Yinshuo DONG Key Laboratory of Meteorological Disaster Ministry of Education(KLME)/Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters(CIC-FEMD)/Joint International Research Laboratory of Climate and Environmental Change(ILCEC)Nanjing University of Information Science&TechnologyNanjing 210044 School of Atmospheric Sciences Nanjing University of Information Science&TechnologyNanjing 210044

Recent studies have suggested a close relationship between early summer precipitation over Northeast China and spring land surface thermal anomalies in West ***,is this relationship the same over the multidecadal timescale? This study aims to identify the long-term variation in this relationship and the accompanying atmospheric circulation anomalies by using singular value decomposition,correlation analysis,and linear regression based on the ECMWF Reanalysis v5(ERA5) atmospheric data,ERA-Land reanalysis,and CN05 gridded observations during1961–2020(60 yr).It is found that an interdecadal transition of the relationship between the spring surface temperature/thermal anomalies in West Asia and early summer precipitation over Northeast China occurred around 1990,and the temperature–rainfall relationship intensified after *** on the Mann–Kendall test,the study period was divided into P1(1961–1990) and P2(1991–2020).Further analysis indicated significant differences in the corresponding atmospheric circulation before and after the interdecadal *** P2,spring land surface warming in West Asia corresponded to a significantly enhanced early summer Circumglobal Teleconnection(CGT),which in turn suppressed the Northeast China cold vortex(NECV).The changes in circulation patterns further resulted in weakened moisture transport,strengthened subsidence,reduced precipitation triggering,and eventually,weakened ***,the results suggest that the interdecadal transition of the relationship and the changes in the corresponding atmospheric circulation may be related to activities of the westerly jet *** second principal component(PC2) mode of empirical orthogonal function(EOF) of zonal wind in June over Asia demonstrated a pattern similar to that of the atmospheric circulation corresponding to land surface thermal *** addition,during P2,the PC2 mode of the westerly jet stream in June showed a strong positive correlation

关键词： land–atmosphere interaction interdecadal variation land surface surface temperature

在线全文

学校读者我要写书评

暂无评论

陆面过程与天气研究

地学前缘 2022年第5期29卷 382-400页

作者：陈海山杜新观孙悦南京信息工程大学气象灾害预报预警与评估协同创新中心/气象灾害教育部重点实验室江苏南京210044 南京信息工程大学大气科学学院江苏南京210044

陆面作为大气运动的下边界,通过动量、热量及物质交换与大气发生复杂的相互作用。陆面过程被认为是影响天气气候的关键过程之一。关于陆面过程对气候的影响已经开展了大量较为深入的研究,相比之下,针对陆面过程对天气的影响研究并没有... 详细信息

陆面作为大气运动的下边界,通过动量、热量及物质交换与大气发生复杂的相互作用。陆面过程被认为是影响天气气候的关键过程之一。关于陆面过程对气候的影响已经开展了大量较为深入的研究,相比之下,针对陆面过程对天气的影响研究并没有受到足够的重视。近年来,陆面过程与天气研究也开始受到了越来越多的关注。本文从陆面基本要素、下垫面构成、陆面诱发的局地环流3个方面,回顾了土壤湿度、地形、土地利用、山谷-平原环流等要素和过程对强对流、暴雨、台风、高温热浪等天气事件影响研究的相关进展,以期为今后的研究提供参考。需要指出,尽管此方面的研究已取得了一定进展,但关于陆面过程对天气,尤其是极端(高影响)天气的影响及机制还有待深入研究,进而从陆面过程的角度来理解重要天气形成、发生和发展的机理,从而为数值模式发展和天气预报业务提供更有力的科学支撑。

关键词：陆面过程天气研究进展

在线全文

学校读者我要写书评

暂无评论

影响中国大陆热带气旋路径分类及其特征研究

气象科学 2019年第3期39卷 304-311页

作者：叶家成杜新观余锦华南京信息工程大学大气科学学院

热带气旋(TC)是影响中国的重要天气系统,对TC路径分类有助于认识热带气旋的活动特征。本文采用中国气象局热带气旋资料中心提供的1949至2016年6—11月最佳TC路径资料,选取TC质心、生命史、转向、强度等特征参数,利用K-means聚类方法将... 详细信息

热带气旋(TC)是影响中国的重要天气系统,对TC路径分类有助于认识热带气旋的活动特征。本文采用中国气象局热带气旋资料中心提供的1949至2016年6—11月最佳TC路径资料,选取TC质心、生命史、转向、强度等特征参数,利用K-means聚类方法将影响中国大陆的热带气旋分为4类。对4类路径进行比对分析后发现各类TC的走向、生命史、活动季节、登陆概率及区域等特征差异显著,TC单体强度和生命史在强厄尔尼诺发展年也有不同程度的增强。在年代际变化上,1998年以来,尽管各类TC频数变化趋势不同,但各类TC单体能量耗散指数均有不同程度的增长趋势,这可能与近年来强厄尔尼诺发展有关。

关键词：热带气旋路径分类类型特征气候趋势

在线全文

学校读者我要写书评

暂无评论

长江三角洲地区昼夜降水变化及其差异

科技通报 2023年第3期39卷 23-31,66页

作者：孙善磊杜新观张艺方周舒佳周洋毕早莹南京信息工程大学气象灾害预报预警与评估协同创新中心/气象灾害教育部重点实验室/大气科学学院南京210044 金坛区气象局江苏金坛213200

厘清长江三角洲(长三角)地区昼夜降水变化规律有助于加深当地降水特征、过程和机制的理解。基于长三角地区202个气象站1973—2017年昼夜降水资料,详细分析了该地区昼夜降水时空变化特征。结果表明:(1)年尺度上,日总、白昼、夜间降水均... 详细信息

厘清长江三角洲(长三角)地区昼夜降水变化规律有助于加深当地降水特征、过程和机制的理解。基于长三角地区202个气象站1973—2017年昼夜降水资料,详细分析了该地区昼夜降水时空变化特征。结果表明:(1)年尺度上,日总、白昼、夜间降水均表现为由南向北递减;降水昼夜差异区域性特征明显,南部白昼降水显著多于夜间降水,而北部情况相反,且昼夜差异较大地区多对应复杂下垫面。降水昼夜差具有明显的季节性差异,春、夏季明显,其中以夏季最大。(2)整体而言,年和各季节(除春季)的日总、白昼、夜间降水均呈不同程度增加趋势,以夏季增加最为明显。年、秋和冬季的日总降水变化由夜间降水主导,春、夏季则由白昼降水主导。(3)夏季极端降水大值区位于浙江东南沿海和安徽西南部山区,且长江以北(南)的极端降水以夜间(白昼)降水为主导。夏季极端降水以增加趋势为主,其中长三角南部和北部的极端降水变化分别由白昼和夜间降水主导。

关键词：昼夜降水线性趋势极端降水时空变化长江三角洲地区

A novel,rapid strategy to form dendritomas from human dendritic cells and hepatocellular carcinoma cell line HCCLM3 cells using mature dendritic cells derived from human peripheral blood CD14+monocytes within 48 hours of in vitro culture

在线全文

学校读者我要写书评

暂无评论

World Journal of Gastroenterology 2004年第24期10卷 3564-3568页

作者： xinguan Ji-RunPeng LanYuan HuiWang Yu-HuaWei Xi-ShengLeng CenterofHepatobiliarySurgery PekingUniversityPeople'sHospital11SouthXizhimenStreetBeijing100044China MedicalandPharmaceuticalAnalysisCenter PekingUniversity38XueyuanStreetBeijing100083China DepartmentofHematology PekingUniversityPeople'sHospital11SouthXizhimenStreetBeijing100044China CenterofHepatobiliarySurgery PekingUniversityPeople'sHospital11SouthXizhimenStreetBeijing100044China

AIM: Dendritomas formed by fusing cancer cells to dendritic cells have already been applied to clinical treatment trial of several types of cancers. Dendritic cells for the fusion in most trials and experiments were from blood monocytes in standard 7-d protocol culture, which requires 5-7 d of culture with granulocyte-macrophage-colony-stimulating factor (GM-CSF) and interleukin-4 (IL-4), followed by 2-3 d of activation with a combination of proinflammatory mediators such as tumor necrosis factorα (TNFα), interleukin-1β (IL-1β), interleukin-6 (IL-6) and prostaglandin E2 (PGE2).One study showed that mature monocyte-derived dendritic cells could be obtained within 48 h of in vitro culture with the same protocol as standard 7-d culture and referred to as FastDCs. Here we aimed to fuse human hepatocellular carcinoma cell line HCCLM3 cells with mature monocytederived dendritic cells within 48 h of in vitro culture (FastDC).METHODS: HCCLM3 cells were cultured in RPMI 1640 with 150 mL/L fetal calf serum (FCS). CD14+monocytes from healthy human peripheral blood were purified with MACS CD14 isolation kit and cultured in six-well plates in fresh complete DC medium containing RPMI-1640, 20 mL/L heat inactivated human AB serum, 2 mmol/1 L-glutamine,100 μg/mL gentamicin, 1000 U/mL GM-CSF and 500 U/mL IL-4 for 24 h, then proinflammatory mediators such as TNFα(1000 U/mL), IL-1β (10 ng/mL), IL-6 (10 ng/mL) and PGE2(1 μg/mL) were supplemented for another 24 h, and thus mature FastDCs were generated. HCCLM3 cells and FastDCs were labeled with red fluorescent dye PKH26-GL and green fluorescent dye PKH67-GL respectively. After the red fluorescent-stained HCCLM3 cells were irradiated with 50 Gy, FastDCs and irradiated HCCLM3 cells were fused in 500 mL/1 polyethylene glycol(PEG)+100 mL/L dimethyl sulfoxide (DMSO) to generate novel dendritornas. The FastDCs and novel dendritomas were immunostained with antiCD80, anti-CD86, anti-CD83, anti-HLA-DR mAbs and analyzed by fluorescence-activated

关键词：树状细胞肝细胞癌癌细胞系统 HCCLM3细胞外周血细胞 CD14+ 单核细胞试管培养肿瘤

Analysis of the Chemical Constituents of the Essential Oil from Anli Pear

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Agricultural Sciences in China 2004年第4期3卷 316-320页

作者： xinguan LIUChang-jiang HOUDong-yan XULin DepartmentofChemistry AnshanNormalUniversityAnshan114005P.R.China CollegeofFoodScience ShenyangAgriculturalUniversityShenyang110161P.R.China

The essential oil of the whole fruit and the peel of Anli pear (Pyrus Ussriensis Maxim.)grown in the western region of Liaoning Province was extracted through the hydrodistillationmethod, and was investigated by gas chromatography-mass spectrometry (GC-MS) *** yields of the essential oils of Anli pear whole fruit and the peel were 0.073 and0.36%, respectively. The identification of the volatile compounds was conducted throughthe commercial National Institute of Science and Technology (NIST) and Wiley massspectral search program, confirmed by comparing the retention indices with standardvalues of authentic samples. A total of 7 and 16 components were identified from theessential oils of the peel and the whole fruit, respectively. The predominant constituentof the two kinds of essential oils was butylated hydroxytoluene, which is a typicalantioxidant.

关键词： Anli pear Essential oil Hydrodistillation GC/MS

A Selective‑Response Hypersensitive Bio‑Inspired Strain Sensor Enabled by Hysteresis Effect and Parallel Through‑Slits Structures

在线全文

学校读者我要写书评

暂无评论

Nano-Micro Letters 2024年第2期16卷 139-153页

作者： Qun Wang Zhongwen Yao Changchao Zhang Honglie Song Hanliang Ding Bo Li Shichao Niu xinguan Huang Chuanhai Chen Zhiwu Han Luquan Ren Key Laboratory of Bionic Engineering(Ministry of Education) Jilin UniversityChangchunJilin 130022People’s Republic of China Liaoning Academy of Materials LiaoningShenyang 110167People’s Republic of China Key Laboratory of CNC Equipment Reliability(Ministry of Education) Jilin UniversityChangchunJilin 130022People’s Republic of China

Flexible strain sensors are promising in sensing minuscule mechanical signals,and thereby widely used in various advanced ***,the effective integration of hypersensitivity and highly selective response into one flexible strain sensor remains a huge ***,inspired by the hysteresis strategy of the scorpion slit receptor,a bio-inspired flexible strain sensor(BFSS)with parallel through-slit arrays is designed and ***,BFSS consists of conductive monolayer graphene and viscoelastic styrene–isoprene–styrene block *** the synergistic effect of the bio-inspired slit structures and flexible viscoelastic materials,BFSS can achieve both hypersensitivity and highly selective frequency ***,the BFSS exhibits a high gage factor of 657.36,and a precise identification of vibration frequencies at a resolution of 0.2 Hz through undergoing different morphological changes to high-frequency vibration and low-frequency ***,the BFSS possesses a wide frequency detection range(103 Hz)and stable durability(1000 cycles).It can sense and recognize vibration signals with different characteristics,including the frequency,amplitude,and *** work,which turns the hysteresis effect into a"treasure,"can provide new design ideas for sensors for potential applications including human–computer interaction and health monitoring of mechanical equipment.

关键词： Bio-inspired strain sensors Hysteresis effect Hypersensitivity Selective frequency response Health monitoring applications

Choix Goncourt China 2022 Winner Announced in Beijing

在线全文

学校读者我要写书评

暂无评论

China Book International 2023年第3期 73-73页

作者： Guo xinguan 不详

On the afternoon of March 28th,the award ceremony of Choix Goncourt China 2022 was held at the residence of the French Ambassador in *** year's winner is the French novel Live Fast,which had already won the Prix Gonco... 详细信息

关键词： China. court French

EGFR突变与ALK重排型肺癌的影像组学研究进展

维普期刊数据库博看期刊评论

在线全文

学校读者我要写书评

暂无评论

国际医学放射学杂志 2018年第4期41卷 431-435页

作者：杨新官关玉宝广州医科大学附属第一医院放射科广州510120 桂林医学院附属医院放射科

肺癌的治疗进入到针对表皮生长因子(EGFR)基因突变、间变性淋巴瘤激酶(ALK)基因重排等驱动基因的个体化分子靶向"精准"治疗的时代。影像组学在预测肺癌EGFR突变、ALK重排具有一定的价值。阐述有关EGFR突变和ALK重排肺癌靶向治疗的相关知... 详细信息

肺癌的治疗进入到针对表皮生长因子(EGFR)基因突变、间变性淋巴瘤激酶(ALK)基因重排等驱动基因的个体化分子靶向"精准"治疗的时代。影像组学在预测肺癌EGFR突变、ALK重排具有一定的价值。阐述有关EGFR突变和ALK重排肺癌靶向治疗的相关知识,对肺癌上述2种基因有关的影像组学表型特征的研究进展予以综述。

关键词：肺癌 EGFR突变 ALK重排影像组学