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Relationship between Extreme Precipitation and Temperature in Two Different Regions:The Tibetan Plateau and Middle–East China

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Journal of Meteorological Research 2019年第5期33卷 870-884页

作者： Rui WANG Tao XIAN Mengxiao WANG Fengjiao CHEN yuanjian YANG Xiangdong ZHANG Rui li Lei ZHONG Chun ZHAO Yunfei FU School of Earth and Space Sciences University of Science and Technology of ChinaHefei 230026China Anhui Meteorological Information Center Anhui Institute of Meteorological SciencesHefei230061China School of Atmospheric physics Nanjing University of Information Science&TechnologyNanjing 210044China International Arctic Research Center and Department of Atmospheric Sciences University of Alaska FairbanksAK 99775USA

The change of extreme precipitation with temperature has regional characteristics in the context of global *** this study, radiosonde data, co-located rain gauge(RG) observations, and Tropical Rainfall Measuring Mission(TRMM) precipitation radar(PR) products are used to explore the relationship between extreme precipitation intensity and near-surface temperature in Middle–East China(MEC) and the eastern Tibetan Plateau(TP) during1998–2012. The results show that extreme precipitation intensity increases with increasing temperature at an approximate Clausius–Clapeyron(C–C) rate(i.e., water vapor increases by 7% as temperature increases by 1°C based on the C–C equation) in MEC and TP, but the rate of increase is larger in TP than in MEC. This is probably because TP(MEC) is featured with deep convective(stratiform) precipitation, which releases more(less) latent heat and strengthens the convection intensity on a shorter(longer) timescale. It is also found that when temperature is higher than 25°C(15°C) in MEC(TP), the extreme precipitation intensity decreases with rise of temperature, suggesting that the precipitation intensity does not always increase with warming. In this case, the limited atmospheric humidity and precipitable water could be the primary factors for the decrease in extreme precipitation intensity at higher temperatures.

关键词： extreme precipitation Clausius–Clapeyron(C–C) rate temperature humidity precipitable water

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Land-surface processes and summer-cloud-precipitation characteristics in the Tibetan Plateau and their effects on downstream weather: a review and perspective

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National Science Review 2020年第3期7卷 500-515页

作者： Yunfei Fu Yaoming Ma Lei Zhong yuanjian Yang Xueliang Guo Chenghai Wang Xiaofeng Xu Kun Yang Xiangde Xu liping liu Guangzhou Fan Yueqing li Donghai Wang School of Earth and Space Sciences University of Science and Technology of China Key Laboratory of Tibetan Environment Changes and Land Surface Processes Institute of Tibetan Plateau ResearchChinese Academy of Sciences CAS Center for Excellence in Tibetan Plateau Earth Sciences Chinese Academy of Sciences University of Chinese Academy of Sciences CAS Center for Excellence in Comparative Planetology School of Atmospheric Physics Nanjing University of Information Science and Technology State Key Laboratory of Severe Weather Chinese Academy of Meteorological Sciences China Meteorological Administration School of Atmospheric Sciences Lanzhou University Ministry of Education Key Laboratory for Earth System Modeling Department of Earth System Science Tsinghua University Chengdu University of Information Technology Institute of Plateau Meteorology CMA School of Atmospheric Sciences Sun Yat-sen University

Correct understanding of the land-surface processes and cloud-precipitation processes in the Tibetan Plateau(TP) is an important prerequisite for the study and forecast of the downstream activities of weather systems and one of the key points for understanding the global atmospheric movement. In order to show the achievements that have been made, this paper reviews the progress on the observations for the atmospheric boundary layer, land-surface heat fluxes, cloud-precipitation distributions and vertical structures by using ground-and space-based multiplatform, multisensor instruments and the effect of the cloud system in the TP on the downstream weather. The results show that the form drag related to the topography, land–atmosphere momentum and scalar fluxes is an important part of the parameterization process. The sensible heat flux decreased especially in the central and northern TP caused by the decrease in wind speeds and the differences in the ground-air temperatures. Observations show that the cloud and precipitation over the TP have a strong diurnal variation. Studies also show the compressed-air column in the troposphere by the higher-altitude terrain of the TP makes particles inside clouds vary at a shorter distance in the vertical direction than those in the non-plateau area so that precipitation intensity over the TP is usually small with short duration, and the vertical structure of the convective precipitation over the TP is obviously different from that in other regions. In addition, the influence of the TP on severe weather downstream is preliminarily understood from the mechanism. It is necessary to use model simulations and observation techniques to reveal the difference between cloud precipitation in the TP and non-plateau areas in order to understand the cloud microphysical parameters over the TP and the processes of the land boundary layer affecting cloud, precipitation and weather in the downstream regions.

关键词： Tibetan Plateau land-surface processes cloud-precipitation characteristics downstream effects

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微波与电热板消解-ICP-OES法测定汽车涂料中的总铅含量

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浙江化工 2024年第7期55卷 50-54页

作者：万日坚卢家俊李晓增叶元坚钟俊芳广州质量监督检测研究院广东广州511447 广州市NQI-质量安全科技协同创新中心广东广州511447

分别采用微波高压密闭消解法和电热板消解法将汽车涂料中的铅消解完全,制成样品溶液后,用电感耦合等离子体发射光谱法(ICP-OES)测定样品溶液中的总铅含量。对两种消解方法的样品测定结果进行比较,微波消解法总铅含量的加标回收率为95.6%... 详细信息

分别采用微波高压密闭消解法和电热板消解法将汽车涂料中的铅消解完全,制成样品溶液后,用电感耦合等离子体发射光谱法(ICP-OES)测定样品溶液中的总铅含量。对两种消解方法的样品测定结果进行比较,微波消解法总铅含量的加标回收率为95.6%~98.1%,电热板消解法总铅含量的加标回收率为97.4%~101.2%。经验证,微波消解法具有耗时短、试剂用量少以及安全性、精确度和准确度较高等优点。

关键词：微波消解电热板消解汽车涂料总铅含量

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基于宏基因组二代测序的儿童肺炎支原体耐药基因位点分析

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中华儿科杂志 2024年第5期62卷 457-461页

作者：王潜杨菊华陈乡张远鉴朱小莹李旭芳苏军萨初然贵杨斌陆国平徐翼广州医科大学附属妇女儿童医疗中心感染性疾病科广州510623 广州微远基因科技有限公司广州510700 复旦大学附属儿科医院新生儿科上海201102 河南省儿童医院重症医学科郑州450018 赤峰市医院儿科赤峰024099 复旦大学附属儿科医院重症医学科上海201102

目的通过宏基因组二代测序(mNGS)分析肺炎支原体(MP)耐药基因位点。方法回顾性队列研究,分析2022年11月至2023年10月通过mNGS检测MP阳性的697份(686例)临床标本(包含痰液、肺泡灌洗液、血液)。根据标本送检科室分为重症监护病房(ICU)送... 详细信息

目的通过宏基因组二代测序(mNGS)分析肺炎支原体(MP)耐药基因位点。方法回顾性队列研究,分析2022年11月至2023年10月通过mNGS检测MP阳性的697份(686例)临床标本(包含痰液、肺泡灌洗液、血液)。根据标本送检科室分为重症监护病房(ICU)送检组和非ICU送检组,组间比较采用χ^(2)检验及Mann-Kendall趋势检验,分析MP耐药基因位点检出率差异及其随着时间的变化趋势。结果697份标本中ICU送检组164份、非ICU送检组533份。MP耐药基因位点检出率为44.3%(309/697),检出的MP耐药基因位点均为A2063G。697份标本中痰液、肺泡灌洗液、血液的MP耐药基因位点检出率分别为53.1%(34/64)、45.2%(263/582)、1/17。ICU送检组MP耐药基因位点检出率为50.0%(82/164),痰液、肺泡灌洗液、血液标本MP耐药基因位点检出率分别为75.0%(18/24)、48.4%(62/128)、1/5,痰液MP耐药基因位点检出率高于肺泡灌洗液(χ^(2)=5.72,P=0.017)。非ICU送检组MP耐药基因位点检出率为42.6%(227/533),痰液、肺泡灌洗液MP耐药基因位点检出率分别为40.0%(16/40)、44.3%(201/454),血液标本未检出(0/12),肺泡灌洗液与痰液检出率比较差异无统计学意义(χ^(2)=0.27,P=0.602)。2022年11月至2023年10月逐月统计总体送检标本(Z=3.99)、ICU送检组(Z=2.93)、非ICU送检组(Z=3.01)MP耐药基因位点的检出率均呈现上升趋势(均P<0.01)。与MP共同检出的细菌中肺炎链球菌检出率最高,为15.5%(108/697),共同检出的病毒中EB病毒检出率最高,为17.6%(123/697)。结论2022年11月至2023年10月MP耐药基因位点检出率呈上升趋势。ICU送检中痰液标本耐药基因位点检出率较高。MP阳性检出的耐药基因位点均为A2063G,未检出新的耐药基因位点。

关键词：肺炎,支原体宏基因组二代测序儿童肺炎支原体耐药基因位点

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经皮肾镜取石术分期治疗结石性脓肾临床效果的Meta分析

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现代泌尿外科杂志 2024年第1期29卷 29-36页

作者：杨斌耿尔康万川平牛愿坚李玉志刘建和昆明医科大学第二附属医院泌尿外科云南昆明650106

目的本研究旨在评价Ⅰ期经皮肾镜取石术(PCNL)和Ⅰ期经皮肾穿刺造瘘术(PCN)、Ⅱ期PCNL治疗结石性脓肾患者的临床疗效,以确定此类患者最佳手术方案的选择。方法全面检索PubMed、Cochrane library、Web of Science和EMBASE数据库以及中国... 详细信息

目的本研究旨在评价Ⅰ期经皮肾镜取石术(PCNL)和Ⅰ期经皮肾穿刺造瘘术(PCN)、Ⅱ期PCNL治疗结石性脓肾患者的临床疗效,以确定此类患者最佳手术方案的选择。方法全面检索PubMed、Cochrane library、Web of Science和EMBASE数据库以及中国知网、万方、维普数据库,于2012年1月—2022年10月发表的有关于结石性脓肾研究的文章,并根据纳入和排除标准选择文献。在检索数据并评价文献质量后,采用Review Manager software(RevMan 5.4.3,Cochrane协作网,Oxford,UK)进行Meta分析。结果本文从105项研究中选择了11项共688例患者。其中347例接受Ⅰ期PCNL治疗,341例患者接受Ⅰ期PCN及Ⅱ期PCNL治疗(以下简称Ⅱ期PCNL)。Meta分析结果显示:Ⅰ期PCNL和Ⅱ期PCNL在结石清除率(P=0.95)、手术时间(P=0.48)、术后感染性休克(P=0.36)、肾周积液感染(P=0.27)方面差异无统计学意义;Ⅰ期和Ⅱ期PCNL在术后发热(P=0.03)、留置肾造瘘管时间(P<0.01)、住院费用(P<0.01)、住院时间(P<0.01)、术后住院时间(P=0.02)方面差异有统计学意义。对于结石性脓肾患者的治疗,以上2种方案在结石清除率、手术时间、术后发生肾周积液感染及感染性休克的发生方面类似。虽然Ⅰ期PCNL术后发热的患者更多,但是住院费用更低,留置肾造瘘管时间、总住院时间、术后住院时间更短。结论Ⅰ期PCNL治疗肾及输尿管上段结石合并脓肾是经济、安全、有效的,在临床实践中具备一定的推广价值。

关键词：泌尿系结石结石性脓肾经皮肾镜取石术经皮肾穿刺造瘘术荟萃分析 Ⅰ期手术分期手术

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一种5G网络协同通信自适应中继选择方案

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邮电设计技术 2024年第1期 74-78页

作者：孙磊丁茂尹以雁幸锋李治文张婧郭建军刘芫健中国移动通信集团云南有限公司云南昆明650228 南京邮电大学电子与光学工程学院、柔性电子学院江苏南京210023

针对协作通信网的中继选择问题,提出了一种基于贝叶斯推理的自适应中继选择方案。该方案拓展地运用了放大转发协议的原理,准确地分析了中继节点后验概率,并以此选取最优的中继节点进行信息传输。实验仿真结果表明,该方案在信噪比恒定的... 详细信息

针对协作通信网的中继选择问题,提出了一种基于贝叶斯推理的自适应中继选择方案。该方案拓展地运用了放大转发协议的原理,准确地分析了中继节点后验概率,并以此选取最优的中继节点进行信息传输。实验仿真结果表明,该方案在信噪比恒定的情况下,显著地提高了网络性能。

关键词：协作网络 5G 放大转发中继选择贝叶斯推理

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Agricultural Ecological Capital: Factor Structure,Value Assessment and Accumulation Mechanism

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Meteorological and Environmental Research 2017年第6期8卷 1-5,14页

作者： li Pingheng Yan lidong Zhu Xiaorong Deng yuanjian School of Business Administration Zhongnan University of Economics and Law Business School Wuhan Institute of Design and Sciences

As a kind of important new capital form,agricultural ecological capital plays a decisive role in guaranteeing healthy development of agricultural ecological economy. Therefore scientific understanding agricultural ecological capital is favorable for developing agricultural ecological economy,while clarifying factor structure,value assessment and accumulation mechanism of agricultural ecological capital is important content of understanding agricultural ecological capital. In this paper,factor structure of agricultural ecological capital is firstly elaborated,and it is thought that agricultural ecological capital is the unity of agricultural ecological environment,agricultural ecological resource and agricultural ecological system. Then agricultural ecological capital value is assessed according to use value method and non use value method,thereby realizing quantification of agricultural ecological capital. After agricultural ecological capital passes through value assessment,the value is more clear,which creates condition for agricultural ecological capital accumulation. Finally accumulation mechanism of agricultural ecological capital is analyzed. Accumulation channel of agricultural ecological capital is explored from natural and human factors,and it is found that agricultural ecological capital accumulates in the forms of agricultural ecological restoration and agricultural ecological compensation.

关键词： Agricultural ecological capital Factor Value Accumulation

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Bronchoscopic transparenchymal nodule access in the diagnosis and management of pulmonary nodules

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Chinese Medical Journal 2023年第13期136卷 1615-1617页

作者： Quncheng Zhang Xuan Wu Huizhen Yang Ya Sun Ziqi Wang li Yang Nan Wei Yihua Zhang yuanjian Yang Xingru Zhao Felix JF Herth Xiaoju Zhang Department of Respiratory and Critical Care Medicine Zhengzhou University People’s HospitalHenan Provincial People’s HospitalZhengzhouHenan 450003China Xinxiang Medical University XinxiangHenan 453003China Department of Pneumology and Respiratory Care Medicine Thoraxklinik and Translational Lung Research CenterUniversity of HeidelbergHeidelberg D-69126Germany

To the Editor:Transthoracic needle aspiration(TTNA)and bronchoscopy have been the preferred methods for the sampling of pulmonary nodules suspected of lung ***,despite having a higher diagnostic accuracy,TTNA has been associated with a high rate of ***,conventional bronchoscopy with a low rate of pneumothorax has exhibited a low diagnostic yield for peripheral pulmonary nodules,particularly for nodules<2 cm in size or those without a bronchus leading directly to ***,Herth et al[1]developed a novel bronchoscopy technique called bronchoscopic transparenchymal nodule access(BTPNA)under the guidance of Archimedes Virtual Bronchoscopic Navigation(VBN)System for the purpose of accessing pulmonary nodules using a transparenchymal approach without relying on the airway to approach the ***,we systematically reviewed evidence regarding BTPNA to provide general guidance on the safe implementation and development of this novel approach.

关键词： diagnosis needle trans

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Simulation and Analysis of Millimeter-Wave Propagation Characteristics in Complex Office Environment

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Journal of Computer and Communications 2015年第3期3卷 56-60页

作者： Yong li Pengfei Wang Feng Chen Guanyun Wang yuanjian liu Zhongxing limited Corporation of Telecommunications Shenzhen China College of Electronic Science and Engineering Nanjing University of Posts & Telecommunications Nanjing China

The several gigabit rate and license-free spectrum resources of 7 GHz bandwidth can be provided by the 60 GHz short-range communication technology, therefore it becomes one of the most promising alternative technologies in the wireless communication. In this paper, the millimeter wave propagation characteristics in the complex office environment are studied by the SBR/Image method. Firstly, under the complex office environment, the propagation characteristics including received power, the arrival angle and the probability distribution of the arrival angle are studied without regard roughness and oxygen absorption loss. Then, the RMS delay spreads in 60 GHz, 2.4 GHz and 5 GHz wireless LAN signals are simulated and compared.

关键词： Millimeter Wave Received Power Arrival Angle RMS Delay Spread

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Simulations of Viscous Flow Fields of ASTM Assembly and the Effective Average Velocities of Flow Tubes

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材料热处理学报 2004年第5期25卷 522-526页

作者： liUYang ZHANGWei-min CHENNai-lu WANGMing-hua lilin-lin yuanjian SchoolofMaterialSci＆Eng ShanghaiJiaoTongUniversityShanghai200030China

With the finite element analysis of viscous quenchant flow fields of the ASTM assembly, the effective average velocities of flow tubes are introduced in this paper. And through the results of experiments, the influenc... 详细信息

关键词： ASTM FEM 计算机模拟冷却曲线流量计管

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