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Evaluation of TIGGE Daily Accumulated Precipitation Forecasts over the Qu River Basin, China

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Journal of Meteorological Research 2019年第4期33卷 747-764页

作者： Li LIU Chao GAO Qian ZHU yue-ping XU Institute of Hydrology and Water Resources College of Civil Engineering and ArchitectureZhejiang UniversityHangzhou 310058 School of Civil Engineering Southeast UniversityNanjing 210096

Quantitative precipitation forecasts(QPFs)provided by three operational global ensemble prediction systems(EPSs)from the THORPEX(The Observing System Research and Predictability Experiment)Interactive Grand Global Ensemble(TIGGE)archive were evaluated over the Qu River basin,China during the plum rain and typhoon seasons of 2009–*** post-processing methods,the ensemble model output statistics based on censored shifted gamma distribution(CSGD-EMOS)and quantile mapping(QM),were used to reduce bias and to improve the *** results were evaluated by using three incremental precipitation thresholds and multiple verification *** is demonstrated that QPFs from NCEP and ECMWF presented similarly skillful forecasts,although the ECMWF QPFs performed more satisfactorily in the typhoon season and the NCEP QPFs were better in the plum rain *** of the verification metrics showed evident seasonal discriminations,with more satisfactory behavior in the plum rain *** precipitation tended to be overestimated,but heavier precipitation was always *** post-processed QPFs showed a significant improvement from the raw forecasts and the effects of post-processing varied with the lead time,precipitation threshold,and *** was better corrected at longer lead times and higher ***-EMOS was more effective for probabilistic metrics and the root-mean-square *** had a greater effect on removing bias according to bias and categorical metrics,but was unable to warrant *** general,raw forecasts can provide acceptable QPFs eight days in *** post-processing,the useful forecasts can be significantly extended beyond 10 days,showing promising prospects for flood forecasting.

关键词： TIGGE quantitative precipitation forecasts quantile mapping censored shifted gamma distribution

Estimation of future water resources of Xiangjiang River Basin with VIC model under multiple climate scenarios

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Water Science and Engineering 2017年第2期10卷 87-96页

作者： Guo-qing Wang Jian-yun Zhang yue-ping Xu Zhen-xin Bao Xin-yue Yang State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering Nanjing Hydraulic Research Institute Research Center for Climate Change Ministry of Water Resources Institute of Hydrology and Water Resources Civil EngineeringZhejiang University College of Hydrology and Water Resources Hohai University

Variation trends of water resources in the Xiangjiang River Basin over the coming decades have been investigated using the variable infiltration capacity(VIC) model and 14 general circulation models'(GCMs') projections under the representative concentration pathway(RCP4.5) scenario. Results show that the Xiangjiang River Basin will probably experience temperature rises during the period from 2021 to2050, with precipitation decrease in the 2020 s and increase in the 2030 s. The VIC model performs well for monthly discharge simulations with better performance for hydrometric stations on the main stream of the Xiangjiang River than for tributary catchments. The simulated annual discharges are significantly correlated to the recorded annual discharges for all the eight selected target stations. The Xiangjiang River Basin may experience water shortages induced by climate change. Annual water resources of the Xiangjiang River Basin over the period from 2021 to 2050 are projected to decrease by 2.76% on average within the range from-7.81% to 7.40%. It is essential to consider the potential impact of climate change on water resources in future planning for sustainable utilization of water resources.

关键词： Water resources Climate change VIC model Xiangjiang River Basin Climate scenarios Hydrological modeling

浅埋偏压黄土双连拱隧道-边坡地震响应特性研究

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公路 2024年第5期69卷 457-465页

作者：张建郭子润李超杰岳建平陈星宇保利长大工程有限公司广州市511431 兰州交通大学土木工程学院兰州市730070

结合实际工程,在模型试验结果和数值模拟结果验证合理的基础上,以地震作用下浅埋偏压黄土双连拱隧道坡—隧系统动力响应特性作为主要研究目标,选取波形为EL波模拟地震作用,建立有限元三维模型,分析了隧道修建前后坡体动力响应差异和不... 详细信息

结合实际工程,在模型试验结果和数值模拟结果验证合理的基础上,以地震作用下浅埋偏压黄土双连拱隧道坡—隧系统动力响应特性作为主要研究目标,选取波形为EL波模拟地震作用,建立有限元三维模型,分析了隧道修建前后坡体动力响应差异和不同地震动强度下坡隧系统的动力响应规律。结果表明:边坡加速度放大系数在陡坡段呈现出明显的非线性变化趋势,隧道修建完成后,地震动在陡坡段引起较大响应,而在缓坡段出现一定的加速度饱和现象;隧道的存在对附近围岩有加固效应,而对坡面有一定的劣化效应;地震动引起台阶状护坡交界处以及距坡脚2/3处附近产生较大的剪应变,且这种响应规律随着地震动强度的增加而显著;地震动强度增加时,岩土—结构相互作用增强,浅埋侧隧道拱顶和右拱腰受力更为不利;0.1~6.25 Hz(低频波)的能量占比测点变化规律与加速度沿测点变化规律一致,是引起土体响应和破坏的主要因素;随着高程增加,陡坡段低频波能量占比高,在缓坡段有减小趋势,而高频波变化趋势与低频波变化趋势相反。本研究对黄土地区软弱围岩的双连拱隧道及边坡抗震设计具有一定的借鉴意义。

关键词：连拱隧道黄土边坡动力响应特征偏压特征小波包分析

嗜水气单胞菌RPA-LFD快速检测方法的建立

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水生生物学报 2024年第5期48卷 849-858页

作者：王姝然徐嘉楠范厚勇郑跃平周天琦张也许丹上海海洋大学上海201306 上海海洋大学国家水生动物病原库上海201306 上海海洋大学农业农村部淡水水产种质资源重点实验室上海201306 上海市水生野生动植物保护研究中心上海200092

文章旨在建立一种针对嗜水气单胞菌的敏感性高、特异性强的快速临床诊断方法。研究根据嗜水气单胞菌促旋酶B亚单位(gyrase subunit B,gyrB)基因的保守序列,设计特异性重组酶聚合酶扩增技术(RPA)扩增引物,通过结合琼脂糖凝胶电泳(AGE)和... 详细信息

文章旨在建立一种针对嗜水气单胞菌的敏感性高、特异性强的快速临床诊断方法。研究根据嗜水气单胞菌促旋酶B亚单位(gyrase subunit B,gyrB)基因的保守序列,设计特异性重组酶聚合酶扩增技术(RPA)扩增引物,通过结合琼脂糖凝胶电泳(AGE)和侧流层析试纸条(LFD)的方法进行反应条件的优化、特异性及灵敏度检测。实验结果表明,所建立的嗜水气单胞菌RPA-LFD快速检测方法可在38℃最适温度下30min内无干扰地检测到嗜水气单胞菌,对嗜水气单胞菌纯培养物和基因组DNA的最小检出限为10^(3)cfu/mL和100 pg/μL。利用建立的RPA-LFD与普通PCR同时检测杂交鲟鱼处理临床样品的结果表明,两种方法的结果一致。综上所述,通过对RPA反应条件的探索和优化,成功建立了嗜水气单胞菌快速检测方法。该方法操作简便,反应迅速,与普通PCR相比,不需要昂贵的仪器,为未来嗜水气单胞菌细菌性疾病的早期诊断提供了更有效的技术支持。

关键词：快速检测重组酶聚合酶扩增技术侧向流动试纸条嗜水气单胞菌

术前放松训练结合精细化护理对行阻生智齿拔除术患者手术质量的影响

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中西医结合护理（中英文） 2024年第7期10卷 81-83页

作者：戴诗辰刘静文岳萍南京医科大学附属口腔医院南苑江苏南京211500

目的分析术前放松训练结合精细化护理对行阻生智齿拔除术患者手术质量及恢复情况的影响。方法纳入2023年2~7月于南京医科大学附属口腔医院南苑行阻生智齿拔除术的80例患者为研究对象,使用简单随机法将其分别纳入观察组和对照组,各40例。... 详细信息

目的分析术前放松训练结合精细化护理对行阻生智齿拔除术患者手术质量及恢复情况的影响。方法纳入2023年2~7月于南京医科大学附属口腔医院南苑行阻生智齿拔除术的80例患者为研究对象,使用简单随机法将其分别纳入观察组和对照组,各40例。2组均接受常规护理及术前放松训练,观察组加用精细化护理。对比2组的手术时间、术后疼痛、面部肿胀程度、焦虑、恐惧及生活质量。结果观察组的手术时间较对照组更短(P<0.05)。术后6 h、12 h、18 h及24 h,2组的视觉模拟评分法(VAS)评分均较术前1 d提高(P均<0.05);观察组均较同期对照组更低(P均<0.05)。术后12 h、18 h及24 h,2组的面部肿胀程度均较术后6 h更严重(P均<0.05);观察组的面部肿胀程度均轻于同期对照组(P均<0.05)。术后7 d,2组的牙科焦虑量表(DAS)和牙科畏惧调查量表(DFS)评分均较术前1 h下降,智齿拔除术后症状严重度量表(PoSSe)评分均较术前1 h提高(P均<0.05);观察组在术后7 d的DAS、DFS和PoSSe评分均较对照组更低(P均<0.05)。结论在术前放松训练的基础上联合精细化护理,可明显缩短行阻生智齿拔除术患者的手术时间,减轻其术后疼痛及面部肿胀,并促进其心理状态和生活质量的改善。

关键词：阻生智齿放松训练精细化护理手术质量术后恢复

Kinetics of Nitrogen Diffusion in Granular Manganese

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Journal of Iron and Steel Research International 2008年第1期15卷 85-88页

作者： ZHANG Jin-zhu XU Chu-shao ZHAO yue-ping College of Material Science and Metallurgy Engineering Guizhou University Guiyang 550003 Guizhou. China College of Material Science and Engineering Chongqing University Chongqing 400044 China

The kinetics and the influence of time on granular manganese nitriding were studied by means of a vacuum resistance furnace,X-ray diffraction technique,and LECO TC-436 oxygen/nitrogen *** longer the nitriding time,the more the nitrogen *** for a trace of oxide MnO that developed,the metal manganese could thoroughly be nitrided to form Mn4N and a little ζ-phase（the stoichiometric components as Mn2N）with the nitriding time lasting.A kinetic model is developed to reveal the nitriding situation and agrees well with the experimental results.

关键词： granular manganese kinetics nitridation~ nitride

Turbulence Intensity and Turbulent Kinetic Energy Parameters over a Heterogeneous Terrain of Loess Plateau

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Advances in Atmospheric Sciences 2015年第9期32卷 1291-1302页

作者： yue ping ZHANG Qiang WANG Runyuan LI Yaohui WANG Sheng Key Laboratory of Arid Climatic Change and Reducing Deserter of Gansu Province Institute of Arid MeteorologyChina Meteorological Administration

A deep understanding of turbulence structure is important for investigating the characteristics of the atmospheric boundary layer,especially over heterogeneous *** the present study,turbulence intensity and turbulent kinetic energy（TKE）parameters are analyzed for different conditions with respect to stability,wind direction and wind speed over a valley region of the Loess Plateau of China during December 2003 and January *** purpose of the study is to examine whether the observed turbulence intensity and TKE parameters satisfy Monin–Obukhov similarity theory（MOST）,and analyze the wind shear effect on,and thermal buoyancy function of,the TKE,despite the terrain *** results demonstrate that the normalized intensity of turbulence follows MOST for all stability in the horizontal and vertical directions,as well as the normalized TKE in the horizontal *** shear effect of the wind speed in the Loess Plateau region is strong in winter and could enhance turbulence for all stability *** daytime,the buoyancy and shear effect together constitute the generation of TKE under unstable *** night,the contribution of buoyancy to TKE is relatively small,and mechanical shearing is the main production form of turbulence.

关键词： heterogeneous terrain turbulence intensity turbulent kinetic energy Monin–Obukhov similarity function

A Delayed HIV Infection Model with the Homeostatic Proliferation of CD4^(+)T Cells

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Acta Mathematicae Applicatae Sinica 2022年第2期38卷 441-462页

作者： Qiang-hui XU Ji-cai HUANG yue-ping DONG Yasuhiro TAKEUCHI School of Mathematics and Statistics and Hubei Key Laboratory of Mathematical Sciences Central China Normal UniversityWuhan 430079China College of Science and Engineering Aoyama Gakuin UniversityKanagawa 252-5258Japan

In this paper,we investigate a delayed HIV infection model that considers the homeostatic prolif-eration of CD4^(+)T *** existence and stability of uninfected equilibrium and infected equilibria(smaller and larger ones)are studied by analyzing the characteristic equation of the *** intracellular delay does not affect the stability of uninfected equilibrium,but it can change the stability of larger positive equilibrium and Hopf bifurcation appears inducing stable limit ***,direction and stability of Hopf bifur-cation are well investigated by using the central manifold theorem and the normal form *** numerical simulation results show that the stability region of larger positive equilibrium becomes smaller as the increase of time ***,when the maximum homeostatic growth rate is very small,the larger positive equilibrium is always *** the contrary,when the rate of supply of T cells is very small,the larger positive equilibrium is always unstable.

关键词： HIV infection and persistence T cell homeostatic proliferation delayed model dynamics analysis Hopf bifurcation

AMPD和AMPK在脂质代谢中作用的研究进展

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饲料研究 2024年第3期47卷 154-158页

作者：时文悦李少琦薛福婷王秀文吴琛杨月萍宋元达山东理工大学农业工程与食品科学学院山东淄博255000

一磷酸腺苷脱氨酶(AMPD)和一磷酸腺苷激活蛋白激酶(AMPK)都是依赖一磷酸腺苷(AMP)调控能量代谢的关键酶,在细胞代谢中起重要作用。文章介绍AMPD和AMPK对脂质代谢相关酶活性的影响以及由胰岛素信号分子引起的相互调控作用,分析二者在三... 详细信息

一磷酸腺苷脱氨酶(AMPD)和一磷酸腺苷激活蛋白激酶(AMPK)都是依赖一磷酸腺苷(AMP)调控能量代谢的关键酶,在细胞代谢中起重要作用。文章介绍AMPD和AMPK对脂质代谢相关酶活性的影响以及由胰岛素信号分子引起的相互调控作用,分析二者在三羧酸循环以及脂质代谢等相关途径中协同调控细胞能量代谢和脂质合成的机制,综述AMPD和AMPK在动物生产中应用的研究成果,总结AMPD和AMPK及其相互作用对脂质代谢相关机制的影响。一方面通过研究脂质代谢途径更全面地了解动物生产;另一方面通过进一步解析脂质的合成途径,了解产油微生物的脂质积累机制,为提高产油微生物脂质产量、生产适口性饲料以及提高动物福利提供参考。

关键词： AMPD AMPK 脂质代谢