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Westward Migration of Tropical Cyclone Activity in the Western North Pacific during 1982–2020:Features and Possible Causes

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Journal of Meteorological Research 2024年第1期38卷 1-9页

作者： Jian ZHONG Huadong DU yuqin wu Yuehua PENG China Satellite Maritime Tracking and Control Department Jiangyin 2144312 College of Advanced Interdisciplinary Studies National University of Defense TechnologyChangsha 4100733 Dalian Naval Academy Dalian 1160184 Institute of Atmospheric Physics Chinese Academy of SciencesBeijing 100029

The westward migration of tropical cyclone(TC)activity has been identified in the western North Pacific(WNP),but the related features and causes remain ***,based on the best track data from China,Japan,and the US,and the NCEP–NCAR reanalysis data in 1982–2020,we investigate characteristics of the westward migration of the WNP TC activity with various metrics,and reveal possible causes for the migration of TC tracks through analyzing its seasonality and dependence on environmental *** results show that the WNP TCs show significant westward migrations in a number of metrics,including location of tracks,genesis,the first track point at which TC reaches its lifetime-maximum intensity,and the last track point in the TC *** is found that TC tracks exhibit more significant westward migrations in the easterly steering flow than in the westerly steering ***,the TC longitude shift shows notable seasonal variations,for which the TCs in the easterlies move further west than those in the westerlies during July–September,vice versa during October–*** dependence of the westward migration of TC tracks on background steering flow is associated with the different environmental *** westward shift in the westerly steering is mainly due to the reduced vertical wind shear(VWS),while the weakened zonal easterly steering and reduced VWS are both closely related to the westward migration in the easterly *** results have important implications for understanding current and future variations in TC longitude shift.

关键词： tropical cyclone westward migration steering flow vertical wind shear

A new method for the prediction of network security situations based on recurrent neural network with gated recurrent unit

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International Journal of Intelligent Computing and Cybernetics 2020年第1期13卷 25-39页

作者： Wei Feng yuqin wu Yexian Fan Department of Computer Science College of Information and Electrical EngineeringNingde Normal UniversityNingdeChina College of Information and Electrical Engineering Ningde Normal UniversityNingdeChina

Purpose-The purpose of this paper is to solve the shortage of the existing methods for the prediction of network security situations(NSS).Because the conventional methods for the prediction of NSS,such as support vector machine,particle swarm optimization,etc.,lack accuracy,robustness and efficiency,in this study,the authors propose a new method for the prediction of NSS based on recurrent neural network(RNN)with gated recurrent ***/methodology/approach-This method extracts internal and external information features from the original time-series network data for the first ***,the extracted features are applied to the deep RNN model for training and *** iteration and optimization,the accuracy of predictions of NSS will be obtained by the well-trained model,and the model is robust for the unstable network ***-Experiments on bench marked data set show that the proposed method obtains more accurate and robust prediction results than conventional *** the deep RNN models need more time consumption for training,they guarantee the accuracy and robustness of prediction in return for ***/value-In the prediction of NSS time-series data,the proposed internal and external information features are well described the original data,and the employment of deep RNN model will outperform the state-of-the-arts models.

关键词： Gated recurrent unit Internal and external information features Network security situation Recurrent neural network Time-series data processing

Composition dependence of viscosity for Al_(1-x)Mg_x(0=x=0.10) alloys

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Chinese Science Bulletin 2007年第11期52卷 1441-1445页

作者： WANG yuqing wu yuqin BIAN XiuFang Key Laboratory of Liquid Structure and Heredity of Materials Ministry of Education Shandong University Jinan 250061 China Jinan Railway Polytechnic Institute Jinan 250013 China

Viscosities of molten Al(1-x)Mgx (0≤x≤0.10) alloys have been measured in the temperature range of 973 K―1173 K by a torsional oscillation cup method. The viscosity dependence on temperature for Al(1-x)Mgx (0≤x≤0.10) melts obeys Arrhenius equation. The viscosity increases with increasing mag-nesium concentration in the investigated system. There is an important relationship between viscosity and its glass-forming ability for metallic melt.

关键词：粘质铝镁合金性质构成

First-principles study of multiple-site substitutions of alloying elements in Ni-based single crystal superalloys

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Science China(Technological Sciences) 2021年第6期64卷 1276-1284页

作者： SUN JunXi DU Wan XIAO Bin wu yuqin LIU Yi ZHANG TongYi State Key Laboratory of Advanced Special Steel Shanghai UniversityShanghai 200444China Materials Genome Institute Shanghai UniversityShanghai 200444China

The development of Ni-based single crystal superalloys relies heavily on the composition design with the addition of critical alloying elements,e.g.,Re and *** the role of alloying effects require to know the configurations of the alloying element distribution betweenγ-Ni andγ′-Ni3Al phases and among various non-equivalent *** work employed firstprinciples density functional theory calculations to study the preference of phase and site occupancy of 11 alloying elements including Al and transition metal elements:3d (Ti,Cr,Co,Ni),4d (Mo,Ru),and 5d (Hf,Ta,W,Re) in Ni and *** calculated the substitution energies of 1298 triple-site doping configurations including 286 Ni Ni Ni site doping of Ni,726 Al Ni Ni site doping,and 286 Ni Ni Ni site doping of Ni3Al with alloying elements Ni,Co,Ru,Cr,Re,Mo,W,Al,Ti,Ta,and *** the dual-site and triple-site doping of Ni and Ni3Al,all studied alloying elements preferred to occupy Ni phase rather than Ni3Al *** found that the most stable defect complexes often contained the favorable substitutions of Al,Ti,Ta,and Hf for the Ni sites that stabilized the alloying elements doping at the other one or two nearest neighbor *** co-substitutions of various alloying elements at multiple sites are critical to understanding the strengthening mechanism of alloying elements in Ni-based single crystal superalloys.

关键词： Ni-based single crystal superalloy first-principles density functional theory calculations phase and site occupancy substitution energy alloy design

Retinol is involved in the intestinal regeneration and strengthens the intestinal barrier during refeeding in broiler chickens

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Journal of Integrative Agriculture 2024年第11期23卷 3843-3859页

作者： Youli Wang Huajin Zhou Jing Chen yuqin wu Yuming Guo Bo Wang Jianmin Yuan Key Laboratory of Qinghai Tibetan Plateau Animal Genetic Resource Reservation and Utilization Ministry of Education/Key Laboratory of Sichuan Province for Qinghai Tibetan Plateau Animal Genetic Resource Reservation and ExploitationCollege of Animal Science and Veterinary MedicineSouthwest Minzu UniversityChengdu 610041China State Key Laboratory of Animal Nutrition College of Animal Science and TechnologyChina Agricultural UniversityBeijing 100193China Sichuan New Hope Liuhe Technology Innovation Co.Ltd. Chengdu 610100China

Fasting is typically used before feeding metabolizable energy assessment in *** studies have shown that fasting cause atrophy of the intestinal *** fasting affects intestinal permeability during refeeding by altering barrier function and nutrient absorption is of ***,23-d-old broilers were randomly assigned to 5 treatments,fasted for 0,12,24,36,and 48 h,respectively,and then refed for 2 d,to study the impact of different duration of fasting on the intestinal regeneration and barrier function during *** showed that the intestinal morphology in fasted birds was recovered in 2 d of refeeding at *** fasting durations increased,enterocytes per intestinal villus were linearly and quadratically increased(both P<0.05),whereas goblet cells per intestinal villus was linearly decreased(both P<0.05).Besides,the mRNA level of lysozyme was linearly decreased as fasting durations increased during refeeding(both P<0.05),while quadratically increased mucin 2 was observed only after 1 d of refeeding(P<0.05).Linear increase effects were observed for claudin 2 and zonula occludens-1with increased fasting durations after 1 d of refeeding(all P<0.05),and linear and quadratical effects were observed for claudin 2 at 2 d of refeeding(both P<0.05).Besides,we found that intestinal permeability to creatinine,4 and 70 kD dextran were linearly and quadratically decreased with increased fasting durations at 6 h and 1 d of refeeding(all P<0.05).Furthermore,jejunum proteomic from birds refed for 6 h showed that birds fasted for 36 h showed increased antimicrobial peptides and upregulated retinol metabolism when compared to the nonfasted birds(P<0.05).Further study showed that retinyl ester catabolism was inhibited during fasting and enhanced during *** of intestinal organoid culture showed that retinol benefits the cell proliferation and enterocyte *** conclusion,the intestinal permeability to small and large molecule

关键词： broiler chicken fasting intestinal barrier intestinal permeability retinol

2021年漾濞M_(S)6.4地震前重力段差指标量分析及场源特征反演

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地震研究 2025年第1期48卷 22-31页

作者：郑秋月黄江培吴宇琴陈政宇刘东王青华云南省地震局云南昆明650224

基于2016-2021年云南地区流动重力重复观测资料,利用流动重力段差变化可视化方法及重力场变化显著性程度指标量G和C值研究了2021年漾濞M_(S)6.4地震前的重力变化,并反演了其与地震孕育相关的场源分布特征,开展了对研究区重力变化及场源... 详细信息

基于2016-2021年云南地区流动重力重复观测资料,利用流动重力段差变化可视化方法及重力场变化显著性程度指标量G和C值研究了2021年漾濞M_(S)6.4地震前的重力变化,并反演了其与地震孕育相关的场源分布特征,开展了对研究区重力变化及场源特征的定性和定量研究。结果表明:①段差表示法的大小和方向对地下物质的运移方向有一定的指示意义,震前重力指标量呈显著上升,震后又迅速回落,重力变化指标量G和C值可作为评价测网区域重力变化显著性程度的定量依据;②反演得到的重力变化场源位置主要集中在红河断裂带北段至滇西北一带,且表现出与维西-乔后断裂及红河断裂带走向较为一致的分布特征,这可能与地震前中上地壳的深部物质运移相关。

关键词：重力段差定量分析重力变化指数场源反演漾濞M_(S)6.4地震

Insights into the proteomic profile of newly harvested corn and metagenomic analysis of the broiler intestinal microbiota

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Journal of Animal Science and Biotechnology 2022年第3期13卷 787-801页

作者： Dafei Yin Youli Wang Liqun Wang yuqin wu Xiaoyi Bian Samuel E.Aggrey Jianmin Yuan College of Animal Husbandry and Veterinary Medicine Shenyang Agricultural UniversityShenyang 110866China State Key Laboratory of Animal Nutrition College of Animal Science and TechnologyChina Agricultural University100193 BeijingChina NutriGenomics Laboratory Department of Poultry ScienceUniversity of GeorgiaAthensGA 30602USA

Background:The use of newly harvested corn in feed causes wet droppings in broilers and increased feed cost which was termed as“new season grain problem”.The present study was conducted to evaluate the proteomic profile of newly harvested corn and the subsequent influence on intestinal microbiol community for broiler ***:Newly harvested corn stored for either half a month(HM)or two months(TM)was used,and the pasting properties,total soluble sugars,and proteomic analysis technology was used to explore the influence of storage on natural aging corn ***,seventy-two 7-day-old Ross 308 male broiler chicken were fed with different stored *** metabolizable energy(AME),digesta viscosity,intestinal morphology and microbiota were examined to explore the influence of feed corn storage on broiler ***:Pasting properties in the TM corn exhibited decreased viscoelastic *** studies found a total of 26 proteins that were differentially expressed between the two treatment *** involved in starch and polysaccharides biosynthesis were upregulated in TM compared with *** fed on TM diet had higher relative energy utilization compared to the HM *** increased corn storage,the relative digesta viscosity decreased significantly(P≤0.05).The total number of goblet cells and lymphocytes was lower in chickens fed the TM *** microbiota data showed that the TM chickens had decreased abundance of diarrheal bacteria such as Hungatella hathewayi and Bacteroides fragilis,and increased butyrate-producing bacteria such as Alistipes compared to the HM ***:Storage of newly harvested corn induced the synthetic reaction of large molecules and changed the solubility of starch and protein with increasing soluble sugars and decreasing pasting properties that may improve the fermentation of intestinal microbiota,improve the energy utilization and protect gut health without the risk of diarrhe

关键词： Broilers Corn Metagenome Proteome Storage

Removal of trace Cr(VI) from water using chitosan-iron nanowires in porous anodic alumina

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Science China Chemistry 2016年第4期59卷 383-386页

作者： Li Sun Zhigang Yuan Wenbang Gong Zili Xu Jijun Lu Qinghua Zou yuqin wu Gongbing Su Huafang Wang School of Mechanical Engineering and Automation Wuhan Textile University

Chitosan-iron nanowires in porous anodic alumina （PAA） have been successfully prepared under ambient conditions as an ad- sorbent. The adsorbent was characterized by scanning electron microscopy, X-ray photoelectron spectroscopy and N2-BET surface area. The results showed that PAA can disperse and protect Fe0 nanorods from oxidation. The adsorption characteris- tics of trace Cr（VI） onto adsorbent have been examined at different initial Cr（VI） concentrations with pH 5. Batch adsorption studies show that the removal percentage of adsorbent for the removal of trace Cr（VI） is strongly dependent on the initial Cr（VI） concentrations. Langmuir and Freundlich isotherm models were used to analyze the experiment data. The adsorption of trace Cr（VI） by adsorbent is well modeled by the Langmuir isotherm and the maximum adsorption capacity of Cr（VI） is calcu- lated as 123.95 mg/g which is very closed to the experiment results. Intraparticle diffusion study shows that the intraparticle diffusion of adsorbent is not the sole rate-controlling step. The negative value of Gibbs free energy change,△G0, indicated that the process of Cr（VI） onto adsorbent was spontaneous. This work has demonstrated that chitosan-iron nanowires in porous anodic alumina as an adsorbent has promising potential for heavy metal removal at trace level.

关键词： chitosan-iron nanowires isotherms Cr(VI) thermodynamics adsorption kinetics

Alcoholic Liver Disease in China:A Disease Influenced by Complex Social Factors That Should Not Be Neglected

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Journal of Clinical and Translational Hepatology 2024年第7期12卷 677-684页

作者： Xiaofeng Feng Nafei Huang yuqin wu Fei Gao Xiaomei Chen Chenyi Zhang Bing Zhang Tao Sun The Second Clinical Medical College of Zhejiang Chinese Medical University HangzhouZhejiangChina The Second Affiliated Hospital of Zhejiang Chinese Medical University HangzhouZhejiangChina Hangzhou First People’s Hospital HangzhouZhejiangChina

Alcoholic liver disease(ALD)encompasses liver damage caused by chronic,excessive alcohol *** manifests initially as marked hepatocellular steatosis and can progress to steatohepatitis,liver fibrosis,and *** China’s rapid economic growth,coupled with a complex social background and the influence of a deleterious wine culture,the number of patients with ALD in China has increased significantly;the disease has become a social and health problem that cannot be *** this review,we briefly described the social factors affecting ALD in China and elaborated on differences between alcoholic and other liver diseases in terms of complications(e.g.,cirrhosis,upper gastrointestinal bleeding,hepatic encephalopathy,hepatocellular carcinoma,addiction,and other extrahepatic diseases).We also emphasized that ALD was more dangerous and difficult to treat than other liver diseases due to its complications,and that precise and effective treatment measures were *** addition,we considered new ideas and treatment methods that may be generated in the future.

关键词： Alcoholic liver disease Wine culture Complication Epidemiology Treatment strategies Comparison