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The Initial Mesoscale Vortexes Leading to the Formation of Tropical Cyclones in the Western North Pacific

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Advances in Atmospheric Sciences 2023年第5期40卷 804-823页

作者： Shenglan wu juan FANG Shanghai Central Meteorological Observatory CMAShanghai 200030China Key Laboratory of Mesoscale Severe Weather(MOE) School of the Atmospheric SciencesNanjing University163 Xianlin RoadNanjing 210046China

A statistical analysis of the initial vortexes leading to tropical cyclone(TC)formation in the western North Pacific(WNP)is conducted with the ECMWF ERA5 reanalysis data from 1999 to *** is found that TCs in the WNP basically originate from three kinds of vortexes,i.e.,a mid-level vortex(MV),a low-level vortex(LV),and a relatively deep vortex with notable vorticity in both the lower and middle troposphere(DV).Among them,LV and DV account for 47.9%and 24.2%of tropical cyclogenesis events,respectively,while only 27.9%of TCs develop from the MV,which is much lower than that which occurs in the North Atlantic and eastern *** a difference might be ascribed to the active monsoon systems in the WNP all year *** to the nearly upright structure of mid-level convergence in the early pre-genesis stage,TC genesis efficiency is the highest in *** with MV,LV generally takes a shorter time to intensify to a TC because of the higher humidity and the stronger low-level cyclonic circulation,which is related to air-sea interaction and boundary-layer *** examination of the relationship between tropical cyclogenesis and large-scale flow patterns indicate that the TC genesis events associated with LV are primarily related to the monsoon shear line,monsoon confluence region,and monsoon gyre,while those associated with MV are frequently connected with easterly waves and wave energy dispersion of preexisting *** with other flow patterns,tropical cyclones usually form and intensify faster in the monsoon confluence region.

关键词： TC formation initial mesoscale vortexes TC genesis efficiency large-scale flow patterns

Intradural osteomas:Report of two cases

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World Journal of Clinical Cases 2021年第8期9卷 1863-1870页

作者： Li Li Guang-yu Ying Ya-juan Tang Hemmings wu Department of Neurosurgery The Second Affiliated Hospital of Zhejiang University School of MedicineHangzhou 310009Zhejiang ProvinceChina

BACKGROUND Intradural osteoma is very rarely located in the subdural or subarachnoid ***,intradural osteoma lacks specificity in clinical manifestations and imaging features and there is currently no consensus on its diagnosis method or treatment ***,the pathogenesis of osteoma without skull structure involvement remains *** SUMMARY We describe two cases of intradural osteomas located in the subdural and subarachnoid spaces,*** first case involved a 47-year-old woman who presented with a 3-year history of intermittent headache and ***,a bony hard mass was found in the left frontal area,attached to the inner surface of the dura mater and compressing the underlying arachnoid membrane and *** second case involved a 56-year-old woman who had an intracranial high-density lesion isolated under the right greater wing of the ***,an arachnoid-covered bony tumor was found in the sylvian *** pathological diagnosis for both patients was *** Surgery and pathological examination are required for diagnosis of intradural osteomas,and craniotomy is a safe and effective treatment.

关键词： Osteoma Intradural Craniotomy Pathogenesis Neural crest cell Case report

Wilson's Disease in China

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Neuroscience Bulletin 2017年第3期33卷 323-330页

作者： juan-juan Xie Zhi-Ying wu Department of Neurology and Research Center of Neurologyin the Second Affiliated Hospital and the Collaborative Innovation Center for Brain ScienceZhejiang University School of MedicineHangzhou 310009China

Wilson＇s disease（WD） is an autosomal recessive disorder of copper metabolism. Its incidence is higher in China than in western countries. ATP7 B is the causative gene and encodes a P-type ATPase, which participates in the synthesis of holoceruloplasmin and copper excretion. Disease-causing variants of ATP7 B disrupt the normal structure or function of the enzyme and cause copper deposition in multiple organs,leading to diverse clinical manifestations. Given the variety of presentations, misdiagnosis is not rare. Genetic diagnosis plays an important role and has gradually become a routine test in China. The first Chinese spectrum of disease-causing mutations of ATP7 B has been established. As a remediable hereditary disorder, most WD patients have a good prognosis with an early diagnosis and chelation treatment. However, clinical trials are relatively few in China, and most treatments are based on the experience of experts and evidences from other countries. It is necessary to study and develop appropriate regimens specific for Chinese WD patients.

关键词： Wilson’s Disease Copper Epidemiology Pathogenesis Management

Flame-retardant and Self-healing Biomass Aerogels Based on Electrostatic Assembly

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Chinese Journal of Polymer Science 2020年第12期38卷 1294-1304页

作者： Ji-yu Yang yu Xia Jin Zhao Long-Fei Yi Yong-Jiao Song Hong wu Shao-yun Guo Li-juan Zhao Jin-Rong wu College of Chemistry and Materials Science Sichuan Normal UniversityChengdu 610066China State Key Laboratory ofPolymer Materials Engineering Polymer Research InstituteSichuan UniversityChengdu 610065China State Key Laboratory ofPolymer Materials Engineering Collegeof Polymer Science and EngineeringSichuan UniversityChengdu 610065China

It remains a significant challenge to fabricate self-healing aerogels with excellent flame ***,we develop a class of biomass aerogels by electrostatically assembling chitosan(CS),phytic acid(PA),and itaconic acid(IA).The electrostatic interaction between CS and IA is weak and dynamic,so freeze-drying the solution of CS and IA enables the formation of continuous aerogel skeleton with self-healing ability and re-programmability;in comparison,the electrostatic interaction between CS and PA is strong and less dynamic,and thus mixing PA with CS in aqueous solution leads to fine precipitates of high flame retardancy due to the synergistic phosphorus-nitrogen *** the continuous skeleton and the fine precipitates results in self-healing aerogles with UL-4 V-0 rating of flame retardancy aerogels and autoextinguishable ***,the aerogels after burning in flame for 30 s form a skin-core structure,and the carbonized skin protects the integrity of the aerogels and the self-healing ability of the internal ***,this work provides a facile strategy to develop multifunctional aerogels which hold great promise for advanced applications.

关键词： Chitosan Flame retardancy Electrostatic interactions Biomass aerogel Self-healing

Hot-cracking susceptibility and shear fracture behavior of dissimilar Ti6Al4V/AA6060 alloys in pulsed Nd:YAG laser welding

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Chinese Journal of Aeronautics 2021年第4期34卷 375-386页

作者： Xin XUE Xinyong wu juan LIAO School of Mechanical Engineering and Automation Fuzhou UniversityFuzhou 350116China Fujian Nebula Electronics Co. Ltd.Fuzhou 350015China

Laser welding of dissimilar titanium/aluminum alloys has been employed at an increasing rate,particularly in the aerospace industry,owing to its advantages in terms of current design flexibility and fuel/cost *** major problem with dissimilar Ti/Al welds arises from the difference in the thermal expansion and contraction of the two metals,which leads to hot-cracking susceptibility and the mitigation of the mechanical property after *** the present study,pulsed Nd:YAG laser welding of Ti6 Al4 V and AA6060 has been ***-cracking susceptibility in the heat affected zone and the shear fracture behavior of the lap joints were investigated through microstructural characterization and mechanical *** results indicate that the hot cracking tendency can be reduced by increasing the pulse peak power(7.5–8.5 kW)and the laser point diameter(0.8–1.0 mm)with specific pulse duration and *** alternative control strategy for less hot cracks in the Ti/Al lap joint can be to increase the weld width and decrease the cooling rate during *** shear fracture of the Ti/Al lap joint is likely to occur along the lower side path of the weld interface with decreasing weld surface collapsed amount and increasing aluminum base metal melt depth.

关键词： Aluminum alloy Hot-cracking susceptibility Pulsed Nd:YAG laser welding Shear fracture behavior Titanium alloy

均质黏土中桩靴基础贯入阻力系数Nc的解析解

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A one-way coupled atmospheric-hydrological modeling system with combination of high-resolution and ensemble precipitation forecasting

工程力学 2025年第1期42卷 233-240页

作者：李大勇王召龙吴宇旗中国石油大学(华东)储运与建筑工程学院山东青岛266580

自升式平台的桩靴基础需逐级预压入海床一定深度，使其承载力满足承受上部平台自重荷载及所受到的海洋环境荷载的要求。随着压入深度的增加，土体将绕过桩靴基础侧面逐渐回流至基础顶部。桩靴基础在不同压入深度处，土体的回流模式不同... 详细信息

自升式平台的桩靴基础需逐级预压入海床一定深度，使其承载力满足承受上部平台自重荷载及所受到的海洋环境荷载的要求。随着压入深度的增加，土体将绕过桩靴基础侧面逐渐回流至基础顶部。桩靴基础在不同压入深度处，土体的回流模式不同，导致基础的贯入阻力发生变化。考虑完全回流和不回流两种极端情况下的土体破坏模式，利用特征线法推导了桩靴基础贯入阻力系数Nc，采用有限元极限分析法验证了计算模型的合理性。与已发表的文献中的离心机试验数据和数值模拟结果进行对比研究，验证了所提的理论方法的准确性。研究表明：光滑基底底部形成两个左右对称的弹性楔体，随着桩靴基础基底剪应力的增加，弹性楔体体积逐渐减小，当基底剪应力达到土体抗剪强度时，弹性楔体消失。贯入阻力系数Nc随着桩靴基础基底剪应力的增加呈线性增加，土体不回流情况下的贯入阻力系数比完全回流情况下的贯入阻力系数低约20%。

关键词：桩靴基础贯入阻力系数解析解均质黏土破坏模式

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Frontiers of Earth Science 2016年第3期10卷 432-443页

作者： Zhiyong wu juan wu Guihua LU College of Hydrology and Water Resources Hohai University Nanjing 210098 China Bureau of Hydrology Information Center of Taihu Basin Authority Shanghai 200434 China

Coupled hydrological and atmospheric model- ing is an effective tool for providing advanced flood forecasting. However, the uncertainties in precipitation forecasts are still considerable. To address uncertainties, a one-way coupled atmospheric-hydrological modeling sys- tem, with a combination of high-resolution and ensemble precipitation forecasting, has been developed. It consists of three high-resolution single models and four sets of ensemble forecasts from the THORPEX Interactive Grande Global Ensemble database. The former provides higher forecasting accuracy, while the latter provides the range of forecasts. The combined precipitation forecasting was then implemented to drive the Chinese National Flood Forecasting System in the 2007 and 2008 Huai River flood hindcast analysis. The encouraging results demonstrated that the system can clearly give a set of forecasting hydrographs for a flood event and has a promising relative stability in discharge peaks and timing for warning purposes. It not only gives a deterministic prediction, but also generates probability forecasts. Even though the signal was not persistent until four days before the peak discharge was observed in the 2007 flood event, the visualization based on threshold exceedance provided clear and concise essential warning information at an early stage. Forecasters could better prepare for the possibility of a flood at an early stage, and then issue an actual warning if the signal strengthened. This process may provide decision support for civil protection authorities. In future studies, different weather forecasts will be assigned various weight coefficients to represent the covariance of predictors and the extremes of distributions.

关键词： one-way coupled hydrological and atmo- spheric modeling flood forecast high-resolution precipita-tion forecasting ensemble prediction

Enteromorpha prolifera polysaccharide-Fe(Ⅲ) complex promotes intestinal development as a new iron supplement

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Science China Life Sciences 2025年第1期 219-231页

作者： Yingying Feng yuying wu Jialu Wang Zhenglin Dong Qian yu Shuangshuang Xia Chunxue Liu Haihua Wang Xin wu Tianjin Institute of Industrial Biotechnology Chinese Academy of Sciences CAS Key Laboratory of Agro-ecological Processes in Subtropical Region Institute of Subtropical AgricultureChinese Academy of Sciences ANYOU Biotechnology Group Co.Ltd Qingdao Seawin Biotech Group Co. LTD

Iron is a crucial micronutrient, and its deficiency can have detrimental effects on the health of infants. Dietary polysaccharide-iron(Ⅲ) complexes(PICs) are promising for addressing iron deficiency due to their minimal adverse reactions and high iron absorption rate. This study aimed to investigate the effects of dietary Enteromorpha prolifera polysaccharide-Fe(Ⅲ) complex(EP-Fe) on newborns, using 3-day weaned piglets as the iron-deficiency model. Results showed that EP-Fe improved iron levels and promoted intestinal development in piglets. Transcriptome sequencing revealed that EP-Fe increased the survival of intestinal epithelial cells under hypoxia by upregulating the expression of genes that promote the development of the vascular system. Additionally, EP-Fe enhanced the mucosal barrier functions by inhibiting myosin light chain kinase(MLCK)/phosphorylated myosin light chain(p-MLC) signaling pathway to increase the expression of intestinal tight junction proteins. Furthermore, the 16S r RNA gene sequencing of gut microbiota showed that EP-Fe promoted the enrichment of Bacteroides＿fragilis and other gut microbes that can metabolize carbohydrates. In conclusion, EP-Fe is an effective iron supplement for newborns, and it can be developed as a comprehensive nutritional supplement.

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The mechanical and water absorption properties of carbon fiber buoyancy materials under hydrostatic pressure

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Science China Technological Sciences 2025年第1期 251-265页

作者： Fanglin CONG Zihan LI Guocai yu Yang JIN Zixu ZHU Linzhi wu College of Aerospace and Civil Engineering Harbin Engineering University Key Laboratory of Advanced Ship Materials and Mechanics Harbin Engineering University Department of Basic Courses Naval University of Engineering

Buoyancy material technology is of paramount importance for the development of marine engineering. In this study,a novel carbon fiber buoyancy material(CFBM) is designed and prepared by utilizing composite circular tubes with light weight and high strength. To reveal the failure mechanism under hydrostatic pressure, a finite element model(FEM) based on the three-dimensional Hashin and Yeh failure criterion is developed and validated experimentally. Both the simulated and experimental results indicate that the hydrostatic strength of the CFBM is mainly determined by the buckling of carbon fiber tubes located at the edges of the CFBM. Parametric analysis is conducted to investigate the effect of the number of unit-cells,length, and wall thickness of carbon fiber tubes on the mechanical properties of the CFBM. In addition, a 60-day water absorption test of the CFBM at 12.5 MPa is conducted to characterize its durability. Experimental results indicate that the maximum water absorption rate of the CFBM is 0.59% and the hydrostatic strength is reduced by only 7.97% during the 60-day test period. Finally, the designed CFBM is used at the water depth of 1000 m as buoyancy material. Compared with traditional buoyancy materials, the proposed CFBM has significant advantages in both hydrostatic strength and density. This work has broad engineering application prospects and is of high significance for promoting the implementation of carbon fiber composites in the ocean engineering field.

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