检索结果-南通市图书馆

Summer extreme precipitation patterns and synoptic-scale circulation precursors over the Tibetan Plateau

Science China Earth Sciences 2024年第5期67卷 1625-1638页

作者： Zhiyuan DING Yao HA zhong zhong College of Meteorology and Oceanography National University of Defense TechnologyChangsha 410073China Key Laboratory for Virtual Geographic Environment School of Geography ScienceNanjing Normal UniversityNanjing 210023China Jiangsu Collaborative Innovation Center for Climate Change School of Atmospheric SciencesNanjing UniversityNanjing 210023China

In the context of global warming,the extreme summer precipitation over the Tibetan Plateau(TP)has changed *** this study,the summer(June–August)extreme precipitation on the TP was classified into three spatial types by applying the K-means clustering method to the Third Pole Region long time-series high-resolution(1/30°)precipitation dataset(TPHi Pr,1979–2020).The characteristics of the circulation anomalies and precursors corresponding to the extreme precipitation on the TP in summer during 1979–2020 were *** results showed that the summer extreme precipitation of the TP can be categorized into northwestern(NW),southeastern(SE),and southern Himalayan(HS)types based on extreme precipitation *** NW and SE types are mainly influenced by anomalous signals in the mid-to-high latitude regions upstream of them,whereas the HS type is controlled by the localized subtropical anomalous *** the 8th day before the onset of the NW type,an anomalous cyclone was observed in the western Atlantic Ocean(60°W,50°N),which triggered the west-to-east quasi-latitudinal propagation of Rossby *** the onset day of the NW type,the upper troposphere showed positive-negative-positive geopotential height anomalies along the latitudinal 40°N from the Caspian Sea,the western part of Xinjiang,to the northeastern *** entered from the Arabian Sea along the southeastern edge of the anomalous cyclone on the southwestern TP and converged in the northwestern *** to the NW type,the precursors of the SE type appeared at higher latitudes and were more *** the 8th day before the onset of the SE type,an anomalous cyclone occurred near Greenland(60°W,70°N)and excited Rossby waves propagating *** the onset day of the SE type,the upper troposphere showed negative-positive-negative geopotential height anomalies across Eurasia from the Ural Mountains and the Iranian Plateau to the northern TP in the northwest-southeast directi

关键词： Tibetan Plateau Summer extreme precipitation Atmospheric circulation anomaly Precursor Teleconnection wave train

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

The Effect of Moisture in Different Altitude Layers on the Eastward Propagation of MJO

引用

Journal of Meteorological Research 2024年第3期38卷 437-452页

作者： Xiaoyu ZHU zhong zhong Yimin ZHU Yunying LI Yijia HU Yao HA College of Meteorology and Oceanography National University of Defense TechnologyChangsha410000China Key Laboratory for Virtual Geographic Environment School of Geography ScienceNanjing Normal UniversityNanjing210023China Jiangsu Collaborative Innovation Center for Climate Change School of Atmospheric SciencesNanjing UniversityNanjing210000China

In this study,driven by ERA5 reanalysis data,the Weather Research and Forecasting(WRF)version 4.0 was used to investigate the eastward propagation of the Madden-Julian oscillation(MJO)in the tropical atmosphere during December-February(DJF)of 2007/*** experiment with 11 cumulus parameterization schemes respectively shows that the Grell 3D scheme is one of several worse ones in describing MJO *** addition,still by use of the Grell 3D scheme,four nudging assimilation experiments for water vapor in all model vertical layers(Ndg_all),lower layers(Ndg_low),middle layers(Ndg_mid),and upper layers(Ndg_upp)were *** is found that when the water vapor in the model approaches to the observed value,the model performance for MJO activities is improved *** the four nudging simulations,Ndg_all certainly performs *** Ndg_mid is important for the MJO-filtered profiles related to moisture,Ndg_low and Ndg_upp exhibit superiority to Ndg_mid in simulating MJO eastward ***_low has advantages when MJO features are represented by zonal wind at 850 hPa and precipitation because the lower-level MJO-filtered moisture is conducive to the existence of lower-level condensational heating to the east of the MJO convective ***_upp performs better when describing the MJO eastward propagation features by outgoing longwave radiation(OLR)since it can capture the moisture and cloud top temperature of deep convection associated with MJO,as well as front Walker *** results suggest that the lower-level moisture is more important in regulating the MJO eastward propagation,and the observed maximum MJO-filtered moisture in the middle troposphere might be a phenomenon accompanying the MJO deep convection,but not a factor controlling its eastward propagation.

关键词： Madden-Julian oscillation(MJO) nudging technique Weather Research and Forecasting(WRF)model vertical moisture structure

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Chiral multiple-resonance thermally activated delayed fluorescence materials based on chiral spiro-axis skeleton for efficient circularly polarized electroluminescence

引用

Science China Chemistry 2024年第7期67卷 2257-2264页

作者： Shi-Quan Song Xiao Han zhong-zhong Huo Ching-Fai Yip Xian-Fang Hong Meng-Ning Ding You-Xuan Zheng State Key Laboratory of Coordination Chemistry Jiangsu Key Laboratory of Advanced Organic MaterialsSchool of Chemistry and Chemical EngineeringNanjing UniversityNanjing 210023China Key Laboratory of Mesoscopic Chemistry of Ministry of Education School of Chemistry and Chemical EngineeringNanjing UniversityNanjing 210023China

Chiral luminescence materials have potential applications in the field of three-dimensional displays due to their circularly polarized luminescence(CPL)***,the further development of circularly polarized organic light-emitting diodes(CP-OLEDs)needs to meet the requirements of high efficiency,high color purity,low cost,and high dissymmetry factor(gPLor gEL),chiral multiple resonance thermally activated delayed fluorescence(MR-TADF)materials are considered as candidates in these ***,based on a pair of chiral spirofluorene precursors,two pairs of high-performance chiral MR-TADF emitters((R/S)-p-Spiro-DtBuCzB and(R/S)-m-Spiro-DtBuCzB)are developed,which exhibit strong emissions peaking at 491 and 502 nm in toluene with full-width at half-maximum values of 25 and 33 nm,*** addition,small singlet–triplet energy gaps of 0.15 and 0.10 eV with high absolute photoluminescence efficiencies of 95.0%and 96.7%are observed for p-Spiro-DtBuCzB and m-Spiro-DtBuCzB molecules,*** based on p-Spiro-DtBuCzB and m-Spiro-DtBuCzB display high maximum external quantum efficiencies of 29.6%and 33.8%,*** importantly,CP-OLEDs present symmetric circularly polarized electroluminescence spectra with|gEL|factors of 3.36×10^(-4)and 7.66×10^(-4)for devices based on(R/S)-p-Spiro-DtBuCzB and(R/S)-m-Spiro-DtBuCzB enantiomers,respectively.

关键词： chiral spiro-axis skeleton-based material multiple resonance thermally activated delayed fluorescence circularly polarized electroluminescence dissymmetry factor external quantum efficiency

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Study on psychological resilience and associated influencing factors in lung cancer patients with bone metastases

引用

World Journal of Psychiatry 2024年第9期14卷 1326-1334页

作者： Chao-Fan Guo Li-Li Wu zhong-zhong Peng Hua-Long Lin Jie-Ni Feng Department of Orthopedics The Third Affiliated Hospital of Wenzhou Medical UniversityWenzhou 325200Zhejiang ProvinceChina Department of Medical Oncology The Third Affiliated Hospital of Wenzhou Medical UniversityWenzhou 325200Zhejiang ProvinceChina Department of Medical Oncology Ningbo Hangzhou Bay HospitalNingbo 315336Zhejiang ProvinceChina

BACKGROUND Evaluating the psychological resilience of lung cancer(LC)patients helps understand their mental state and guides future ***,there is limited research on the psychological resilience of LC patients with bone *** To explore the psychological resilience of LC patients with bone metastases and identify factors that may influence psychological *** LC patients with bone metastases who met the inclusion criteria were screened from those admitted to the Third Affiliated Hospital of Wenzhou Medical *** psychological scores of the enrolled patients were *** were then grouped based on the mean psychological score:Those with scores lower than the mean value were placed in the low-score group and those with scores equal to or greater than the mean value was placed in the high-score *** baseline data(age,gender,education level,marital status,residence,monthly income,and religious beliefs),along with self-efficacy and medical coping mode scores,were *** This study included 142 LC patients with bone metastases admitted to our hospital from June 2022 to December 2023,with an average psychological resilience score of 63.24±9.96 *** grouping,the low-score group consisted of 69 patients,including 42 males and 27 females,with an average age of 67.38±9.55 *** high-score group consisted of 73 patients,including 49 males and 24 females,with a mean age of 61.97±5.00 years.χ2 analysis revealed significant differences between the two groups in education level(χ2=6.604,P=0.037),residence(χ2=12.950,P=0.002),monthly income(χ2=9.375,P=0.009),and medical coping modes(χ2=19.150,P=0.000).Independent sample t-test showed that the high-score group had significantly higher self-efficacy scores(t=3.383,P=0.001)and lower age than the low-score group(t=4.256,P<0.001).Furthermore,multivariate logistic regression hazard analysis confirmed that self-efficacy is an independent protective factor for psy

关键词： Lung cancer Bone metastases Psychological resilience Influencing factors Clinical evaluation

来源：

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

The association and underlying mechanism of the digit ratio(2D:4D)in hypospadias

引用

Asian Journal of Andrology 2024年第4期26卷 356-365页

作者： Yu Ding Zu-Quan Chen Wen-Feng Pan Hao-Jie Chen Min Wu Yi-Qing Lyu Hua Xie Yi-Chen Huang zhong-zhong Chen Fang Chen Department of Urology Shanghai Children’s HospitalSchool of MedicineShanghai Jiao Tong UniversityShanghai 200062China Urogenital Development Research Center Shanghai Children’s HospitalSchool of MedicineShanghai Jiao Tong UniversityShanghai 200062China Clinical Research Center for Hypospadias Pediatric CollegeShanghai Jiao Tong University School of MedicineShanghai 200062China.

The second-to-fourth digit(2D:4D)ratio is thought to be associated with prenatal androgen ***,the relationship between the 2D:4D ratio and hypospadias is poorly understood,and its molecular mechanism is not *** this study,by analyzing the hand digit length of 142 boys with hypospadias(23 distal,68 middle,and 51 proximal)and 196 controls enrolled in Shanghai Children’s Hospital(Shanghai,China)from December 2020 to December 2021,we found that the 2D:4D ratio was significantly increased in boys with hypospadias(P<0.001)and it was positively correlated with the severity of the *** was further verified by the comparison of control mice and prenatal low testosterone mice model obtained by knocking out the risk gene(dynein axonemal heavy chain 8[DNAH8])associated with ***,the discrepancy was mainly caused by a shift in *** characterization of a mouse model validated that low testosterone levels during pregnancy can impair the growth and development of *** mechanistic explorations revealed that during the androgen-sensitive window,the downregulation of the androgen receptor(AR)caused by low testosterone levels,as well as the suppressed expression of chondrocyte proliferation-related genes such as Wnt family member 5a(Wnt5a),Wnt5b,Smad family member 2(Smad2),and Smad3;mitochondrial function-related genes in cartilage such as AMP-activated protein kinase(AMPK)and nuclear respiratory factor 1(Nrf-1);and vascular development-related genes such as myosin light chain(MLC),notch receptor 3(Notch3),and sphingosine kinase 1(Sphk1),are responsible for the limitation of 4D growth,which results in a higher 2D:4D ratio in boys with hypospadias via decreased endochondral *** study indicates that the ratio of 2D:4D is a risk marker of hypospadias and provides a potential molecular mechanism.

关键词： androgen receptor digit ratio(2D:4D) endochondral ossification hypospadias testosterone level

来源：

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

市场情绪与基金投资策略:迎合还是修正?

引用

管理科学学报 2024年第3期27卷 112-132页

作者：王健易尚昆蒋忠中秦绪伟东北大学工商管理学院沈阳110167 东北大学行为与服务运作管理研究所沈阳110167

基金投资策略选择是学术界、监管者和市场参与者共同关注的焦点.本文根据行为资产定价理论将基金投资策略量化为组合收益的市场情绪敏感度,首次在微观层面对其按照市场状态分类界定为迎合情绪策略与修正情绪策略,通过理论模型和实证检... 详细信息

基金投资策略选择是学术界、监管者和市场参与者共同关注的焦点.本文根据行为资产定价理论将基金投资策略量化为组合收益的市场情绪敏感度,首次在微观层面对其按照市场状态分类界定为迎合情绪策略与修正情绪策略,通过理论模型和实证检验探究基金的投资策略选择对其流量、风险和经理努力程度产生的系统影响,从行为委托代理视角剖析基金业绩的影响机制.研究发现:基金采取迎合策略时,对投资者特别是个体投资者更有吸引力,但会对投资者利益造成隐性侵害,表现为基金未来的风险增大、收益降低,且基金经理在无需付出更多努力的情况下可获得更高报酬.进一步分析表明,基金经理为取悦投资者的消极放任行为是其业绩表现不佳的重要原因;基金采取修正策略时,产生的系列影响则完全相反.本研究为中小投资者的投资实践、基金治理与监管,及解释基金市场异象提供了新的思路与启示.

关键词：市场情绪基金投资策略行为资产定价行为委托代理

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

超高层建筑设计的几个新趋势——以深圳为例

引用

华中建筑 2024年第6期42卷 64-70页

作者：钟中刘邓远深圳大学建筑与城市规划学院

超高层建筑从萌芽诞生到发展至今已100多年,已在不同程度影响着人们的生活。该文基于深圳市近年30个超高层建筑案例,梳理超高层建筑设计呈现出新趋势的契机和在整体规划和建筑设计层面上的特点,分析归纳出超高层建筑设计城市枢纽化、垂... 详细信息

超高层建筑从萌芽诞生到发展至今已100多年,已在不同程度影响着人们的生活。该文基于深圳市近年30个超高层建筑案例,梳理超高层建筑设计呈现出新趋势的契机和在整体规划和建筑设计层面上的特点,分析归纳出超高层建筑设计城市枢纽化、垂直城市化、空间开放化、功能复合化和结构表皮一体化的五个趋势,以期为今后的超高层建筑设计提供一些方向和策略。

关键词：深圳高密度城市超高层建筑案例研究新趋势

来源：

维普期刊数据库

同方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

文化综合体全时开放的公共空间设计研究——以深圳为例

引用

住区 2024年第3期 29-38页

作者：钟中杨晓莹深圳大学建筑与城市规划学院

全时开放公共空间设计是影响文化综合体公共空间层次和市民行为活动的重要因素,注重其设计质量对于城市公共空间和市民日常活动都具有重要意义。本文从公共活动的相关理论出发,探讨深圳文化综合体全时开放的公共空间承载市民活动的机制... 详细信息

全时开放公共空间设计是影响文化综合体公共空间层次和市民行为活动的重要因素,注重其设计质量对于城市公共空间和市民日常活动都具有重要意义。本文从公共活动的相关理论出发,探讨深圳文化综合体全时开放的公共空间承载市民活动的机制。从激活市民日常公共活动的角度,综合深圳市具有代表性的案例与实践,解析新趋势下文化综合体全时开放公共空间的具体设计方法,反思设计结果,提出了边界消隐、连接加强、尺度适宜、功能复合、流线立体、激发活力的设计策略。

关键词：市民日常活动激发活力文化综合体全时开放公共空间设计研究

来源：

维普期刊数据库博看期刊

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

超临界二氧化碳流量测量方法研究

引用

中国测试 2024年第1期50卷 62-68页

作者：罗凡蒋岳峰甘蓉雷励赵宇轩钟忠中国测试技术研究院四川成都610021 中国计量科学研究院北京100029 核工业西南物理研究院四川成都610225

在临界点附近的超临界流体,操作温度或操作压力的微小变化,都会引起超临界流体密度的很大变化,因此,尚无能够满足实时、准确、可溯源要求的超临界流体流量测量方法及仪表。该文首先分析超临界二氧化碳在拟临界温度区域的物理特性;然后... 详细信息

在临界点附近的超临界流体,操作温度或操作压力的微小变化,都会引起超临界流体密度的很大变化,因此,尚无能够满足实时、准确、可溯源要求的超临界流体流量测量方法及仪表。该文首先分析超临界二氧化碳在拟临界温度区域的物理特性;然后分别研究科里奥利质量流量计和差压流量计的超临界流体测量特点,确定流量测量所需的工况条件;最后提出一种以科里奥利质量流量计对差压流量计进行动态密度修正,从而提高超临界流体质量流量测量精度的流量计组合方法。验证实验中,该文以质量法液体流量标准装置对上述两种流量计进行校准,再基于雷诺数近似原理采用质量法气体流量标准装置进行模拟测试,评估动态响应能力及两种被测介质之间的测量误差。实验结果表明:该流量计组合方法具备超临界二氧化碳流量测量的能力,可实现以科里奥利质量流量计作为工作级标准的超临界二氧化碳量值溯源。

关键词：超临界二氧化碳科里奥利质量流量计差压式流量计

来源：

维普期刊数据库博看期刊

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

两种重要经济石斑鱼肠道微生物群落结构及代谢功能的比较分析

引用

海洋与湖沼 2024年第1期55卷 253-264页

作者：杜倩平谢广婷钟仲轩张明清吴锦辉舒琥广州大学生命科学学院广东广州510006 中山大学生命科学学院广东广州510275 广东省农业技术推广中心广东惠州516081

为揭示虎龙杂交斑(Epinephelus fuscoguttatus♀×***♂)和斜带石斑鱼(Epinephelus coioides)肠道微生物群落的结构及功能差异,利用16S rDNA高通量测序技术对其肠道微生物群落进行分析。结果表明:(1)虎龙杂交斑肠道微生物群落以变形菌门... 详细信息

为揭示虎龙杂交斑(Epinephelus fuscoguttatus♀×***♂)和斜带石斑鱼(Epinephelus coioides)肠道微生物群落的结构及功能差异,利用16S rDNA高通量测序技术对其肠道微生物群落进行分析。结果表明:(1)虎龙杂交斑肠道微生物群落以变形菌门(Proteobacteria)、厚壁菌门(Firmicutes)和放线菌门(Actinobacteria)为主,斜带石斑鱼中以变形菌门、梭杆菌门(Fusobacteria)和厚壁菌门为主。(2)在属水平,虎龙杂交斑和斜带石斑鱼肠道中均含有高丰度的弧菌属(Vibrio)。鲸杆菌属(Cetobacterium)、发光杆菌属(Photobacterium)和丙酸菌属(Propionigenium)是斜带石斑鱼肠道中的标志微生物,而虎龙杂交斑肠道中的标志微生物为棒状杆菌属1(Corynebacterium 1)、变形杆菌属(Proteus)、葡萄球菌属(Staphylococcus)和类香菌属(Myroides)。(3)网络分析显示,变形菌门在两种石斑鱼肠道中均占主导地位。(4)功能预测表明,虎龙杂交斑肠道微生物群落中抗坏血酸与糖醛酸代谢、植物-病原体相互作用和胰岛素信号通路显著高于斜带石斑鱼,斜带石斑鱼肠道微生物群落的功能在万古霉素类抗生素和链霉素生物合成、亚油酸代谢、双酚降解以及类黄酮生物合成的相关途径中显著富集。研究结果有望加深对石斑鱼肠道微生物群落的认识,为选择合适的石斑鱼养殖品种,提高石斑鱼养殖产业的经济效益提供科学参考。

关键词：虎龙杂交斑(Epinephelus fuscoguttatus♀×E.lanceolatus♂) 斜带石斑鱼(Epinephelus coioides) 肠道微生物物种特异性代谢功能

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：