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Assessing the Applicability of Multi-Source Precipitation Products over the Chinese Mainland and Its Seven Regions

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Journal of Tropical Meteorology 2024年第3期30卷 275-288页

作者： TIAN Wei wu yun-long LIN Chen ZHANG Jing-guo LIM KAM SIAN Kenny Thiam Choy School of Computer and Software Nanjing University of Information Science&TechnologyNanjing 210044 China School of Atmospheric Science and Remote Sensing Wuxi UniversityWuxiJiangsu 214105 China

Satellite-based and reanalysis precipitation products provide valuable information for various ***,their performance varies widely across regions due to different data sources and production *** paper evaluated the daily performance of four precipitation products(MSWEP,ERA5,PERSIANN,and TRMM)for seven regions of the Chinese mainland,using observations from 2462 ground stations across the country as a *** used four statistical and four classification indicators to describe their spatial and temporal accuracy,and capability to detect precipitation events while analyzing their *** results show that according to the precipitation char-acteristics and accuracy of different types of precipitation products over the Chinese mainland,MSWEP was the most suitable product over the Chinese mainland,having the lowest root mean square error and mean absolute error,along with the highest coefficient of *** was followed by TRMM and ERA5,whereas PERSIANN lagged behind in terms of *** terms of different regions,MSWEP still performed well,especially in North China and East *** accuracy of the four precipitation products was relatively low in the summer months,and they all overestimated in the northwest *** other months,MSWEP and TRMM were better than PERSIANN and *** four precipitation products had good detection performance over the Chinese mainland,with probability of detection above ***,with the increase of precipitation threshold,the detection capability of the four products decreased,and MSWEP and ERA5 had good detection capability for moderate ***’s detection capability for heavy rain and rainstorms was better than that of the other three products,and PERSIANN’s detection capability for moderate rain,heavy rain and rainstorms was relatively poor,with a large deviation.

关键词： precipitation product MSWEP TRMM ERA5 PERSIANN

Sex-dependent alterations in extracellular vesicles linking chronic spinal cord injury to brain neuroinflammation and neurodegeneration

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Neural Regeneration Research 2025年第2期20卷 483-484页

作者： yun Li Junfang wu Department of Anesthesiology&Shock Trauma and Anesthesiology Research(STAR)CenterUniversity of Maryland School of MedicineBaltimoreMDUSA

Traumatic spinal cord injury(SCI)is a devastating exogenous injury with long-lasting consequences and a leading cause of death and disability *** in assistive technology,rehabilitative interventions,and the ability to identify and intervene in secondary conditions have significantly increased the long-term survival rate of SCI patients,with some people even living well into their seventh or eighth *** survival changes have led neurotrauma researchers to examine how SCI interacts with brain *** health and epidemiological data showed that patients with long-term SCI can have a lower life expectancy and quality of life,along with a higher risk of comorbidities and complications.

关键词： alterations inflammation injury

采用长短时记忆网络训练的卫星重力数据粗差探测方法与应用

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地震地质 2021年第5期43卷 1326-1338页

作者：杨玉吴云龙姚运生单维锋防灾科技学院三河065201 中国地震局地震研究所中国地震局地震大地测量重点实验室武汉430071

粗差探测是卫星重力数据预处理环节的关键步骤。针对海量观测数据如卫星重力梯度数据,原有的粗差探测方法存在时间消耗长、准确率较低等不足。文中基于长短时记忆(LSTM)网络方法,提出了可用于重力梯度数据粗差探测的机器学习方法,实现... 详细信息

粗差探测是卫星重力数据预处理环节的关键步骤。针对海量观测数据如卫星重力梯度数据,原有的粗差探测方法存在时间消耗长、准确率较低等不足。文中基于长短时记忆(LSTM)网络方法,提出了可用于重力梯度数据粗差探测的机器学习方法,实现了对长时间序列观测数据的粗差识别问题,避免了粗差对观测数据的影响。计算结果显示,LSTM训练模型的预测精度达99.4%,在预测过程中,扩大训练数据量或增加LSTM神经元的个数都可提高预测效果,且损失函数、学习率、迭代次数等是影响预测效果的主要模型参数。训练模型识别粗差实验结果表明:LSTM模型能够很好地应用于卫星重力梯度测量观测数据的粗差探测。

关键词：卫星重力梯度粗差探测长短时记忆网络模型参数

Risk factors for nonclosure of defunctioning stoma and stoma-related complications among low rectal cancer patients after sphincter-preserving surgery

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Chronic Diseases and Translational Medicine 2020年第3期6卷 188-197页

作者： Lin Zhang Wei Zheng Jian Cui yun-long wu Tian-Lei Xu Hai-Zeng Zhang Department of Colorectal Surgery State Key Lab of Molecular OncologyNational Cancer Center/National Clinical Research Center for Cancer/Cancer HospitalChinese Academy of Medical SciencesPeking Union Medical CollegeBeijing 100021China

Background::Defunctioning stoma is widely used to reduce anastomotic complications in rectal cancer ***,the complications of stoma and stoma reversal surgery should not be ***,in some patients,stoma reversal ***,we investigated the complications of defunctioning stoma surgery and subsequent reversal surgery and identify risk factors associated with the failure of getting stoma ***::In total,154 patients who simultaneously underwent low anterior resection and defunctioning stoma were *** were divided into two groups according to whether their stoma got reversed or *** reasons that patients received defunctioning stoma and experienced stoma-related complications and the risk factors for failing to get stoma reversed were ***::The mean follow-up time was 47.54(range 4.0-164.0)*** follow-up,19.5%of the patients suffered stoma-related long-term *** 79(51.3%)patients had their stomas *** morbidity of complications after reversal surgery was 45.6%,and these mainly consisted of incision-related *** analyses showed that pre-treatment comorbidity(HR=3.17,95%CI 1.27-7.96,P=0.014),postoperative TNM stage(HR=2.55,95%CI 1.05-6.18,P=0.038),neoadjuvant therapy(HR=2.75,95%CI 1.07-7.05,P=0.036),anastomosis-related complications(HR=4.52,95%CI 1.81-11.29,P=0.001),and disease recurrence(HR=24.83,95%CI 2.90-213.06,P=0.003)were significant independent risk factors for a defunctioning stoma to be ***::Defunctioning stoma is an effective method to reduce symptomatic anastomotic leakage,but the stoma itself and its reversal procedure are associated with high morbidity of complications,and many defunctioning stomas eventually become ***,surgeons should carefully assess preoperatively and perform defunctioning stomas in very high risk *** addition,doctors should perform stoma reversal surgery more actively to p

关键词： Rectal cancer Low anterior resection Anastomotic complications Defunctioning stoma Stoma reversal surgery

Multi-UAV surveillance implementation under hierarchical dynamic task scheduling architecture

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Journal of Central South University 2020年第9期27卷 2614-2627页

作者： wu Wen-di wu yun-long LI Jing-hua REN Xiao-guang SHI Dian-xi TANG Yu-hua State Key Laboratory of High Performance Computing(HPCL) College of ComputerNational University of Defense TechnologyChangsha 410073China Artificial Intelligence Research Center(AIRC) National Innovation Institute of Defense Technology(NIIDT)Beijing 100071China Tianjin Artificial Intelligence Innovation Center(TAIIC) Tianjin 300457China

In this paper,we consider a multi-UAV surveillance scenario where a team of unmanned aerial vehicles(UAVs)synchronously covers an area for monitoring the ground *** this scenario,we adopt the leader-follower control mode and propose a modified Lyapunov guidance vector field(LGVF)approach for improving the precision of surveillance trajectory ***,in order to adopt to poor communication conditions,we propose a prediction-based synchronization method for keeping the formation ***,in order to adapt the multi-UAV system to dynamic and uncertain environment,this paper proposes a hierarchical dynamic task scheduling *** this architecture,we firstly classify all the algorithms that perform tasks according to their functions,and then modularize the algorithms based on plugin ***,integrating the behavior model and plugin technique,this paper designs a three-layer control flow,which can efficiently achieve dynamic task *** order to verify the effectiveness of our architecture,we consider a multi-UAV traffic monitoring scenario and design several cases to demonstrate the online adjustment from three levels,respectively.

关键词： prediction-based synchronization dynamic task scheduling hierarchical software architecture

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基于压缩感知的激光干扰图像尺度分析

发光学报 2013年第8期34卷 1096-1101页

作者：吴云龙孙晓泉徐银脉冲功率激光技术国家重点实验室安徽合肥230037

利用激光干扰CCD成像侦察系统可以使其降低或失去侦察能力,客观、准确、定量地评估干扰的效果是干扰技术研究的重要环节。本文以现有的背景杂波量化尺度为基础,结合激光干扰图像对CCD成像系统目标检测性能的影响,提出了基于压缩感知的... 详细信息

利用激光干扰CCD成像侦察系统可以使其降低或失去侦察能力,客观、准确、定量地评估干扰的效果是干扰技术研究的重要环节。本文以现有的背景杂波量化尺度为基础,结合激光干扰图像对CCD成像系统目标检测性能的影响,提出了基于压缩感知的图像尺度,并将该尺度运用于基于机器视觉的激光干扰CCD效果评估。激光视场内干扰实验及数值计算表明:该方法能够利用压缩感知理论的特点,较好地实现了对激光干扰CCD成像检测系统效果的定量评估,从而验证了该尺度的有效性。

关键词：压缩感知激光干扰机器视觉评估

THE INVESTIGATION OF PREPARATION AND THERMOLYSIS PROCESS OF HOLMIUM NITRATE HYDRATES

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Chinese Science Bulletin 1989年第16期34卷 1407-1408页

作者：高胜利姜相武丁云龙 Department of Chemistry Northwest University Xi'an

Holmium nitrate n-hydrates were prepared by the procedure referred to in Ref.[1]. The faint yellow n-hydrates （n=6, 5, 3） crystallized were dried in a desiccator over sulfuric acid of 48, 60 and 98% in concentration respectively. Ho2O3 contents were respectively 76.43 （76. 42）,79.58 （79.60）and 86.66 （86.66）（%）, and hydration numbers, 6.00±0,01, 4.99±0.01 and 3.00±0.01 measured by EDTA titration. M. P. （℃） were 57--58, 73--

关键词： nitrate titration hydration dried yellow crystallized slower heating referred 月卜

双因素横向竞争下的生鲜农产品发散型供应链博弈模型

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运筹与管理 2016年第5期25卷 102-109页

作者：冯颖吴茜余云龙中国矿业大学管理学院江苏徐州221116

研究由一个生产商和两个零售商构成的生鲜农产品发散型供应链,其中,生产商为Stackelberg博弈的主导者,负责提供物流服务,而零售商均为跟随者且存在横向竞争,其终端市场需求受零售价格和物流服务水平双因素的影响。针对零售商之间存在Ber... 详细信息

研究由一个生产商和两个零售商构成的生鲜农产品发散型供应链,其中,生产商为Stackelberg博弈的主导者,负责提供物流服务,而零售商均为跟随者且存在横向竞争,其终端市场需求受零售价格和物流服务水平双因素的影响。针对零售商之间存在Bertrand和Stackelberg两种博弈的情形,分别建立了SSB和SSS博弈模型。研究表明:(1)若生产商提供异质物流服务,SSS中强势零售商的最优物流服务水平低于SSB中该零售商的相应值,而弱势零售商的最优物流服务水平则高于SSB中该零售商的相应值。(2)若生产商提供同质物流服务,SSS中最优物流服务水平低于SSB模型中的相应值。(3)SSB模型中,生产商倾向于提供同质物流服务;SSS模型中,生产商则倾向于提供异质物流服务。最后给出算例验证了上述结论,并进一步在特定情形下,对各模型中系统成员的价格决策和利润进行了深入的比较分析。

关键词：供应链管理决策分析 Bertrand博弈 Stackelberg博弈生鲜农产品

基于Forward-Modeling方法的黑河流域水储量变化特征研究

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地球物理学报 2015年第10期58卷 3507-3516页

作者：吴云龙李辉邹正波康开轩刘子维中国地震局地震研究所(地震大地测量重点实验室) 武汉430071 中国地震局地壳应力研究所武汉科技创新基地武汉430071

黑河流域陆地水储量变化对流域下游等周边区域水资源的合理利用以及经济和社会发展等有着重要的意义.本文利用2003年1月至2013年12月的GRACE RL05数据反演了黑河流域陆地水储量长时间序列的变化,并针对重力场模型和数据处理中产生的信... 详细信息

黑河流域陆地水储量变化对流域下游等周边区域水资源的合理利用以及经济和社会发展等有着重要的意义.本文利用2003年1月至2013年12月的GRACE RL05数据反演了黑河流域陆地水储量长时间序列的变化,并针对重力场模型和数据处理中产生的信号泄漏问题,采用Forward-Modeling方法进行了改正并恢复泄漏信号;将GRACE获得的泄漏信号恢复前后的黑河流域水储量变化结果与全球水文模型GLDAS和CPC进行比较分析,结果表明泄漏信号改正后的结果与水文模型结果的时间序列相关性均有明显提高,从其空间分布结果可以看出Forward-Modeling方法有效地恢复初始信号、增强被湮没的信号,泄漏信号误差减小;通过分析黑河流域水储量变化的长时间序列结果,发现其具有明显的阶段性变化特征,即2003—2006年呈明显下降趋势,约为-0.86cm·a-1,在2007—2010年趋于平衡状态,而2011—2013年则呈现缓慢上升趋势约为0.14cm·a-1;联合GRACE数据和GLDAS数据反演了黑河流域地下水储量变化,并与全球降雨数据GPCC进行了比较分析,两者相关性可达到0.88以上.

关键词： GRACE 黑河流域水储量变化 Forward-Modeling方法水文模型