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Numerical Simulation of the Mass Movement Process of the 2018 Sedongpu Glacial Debris Flow by Using the Fluid-Solid Coupling Method

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Journal of Earth Science 2024年第2期35卷 583-596页

作者： Xing-yu Long yu-xiang hu Bin-Rui Gan Jia-Wen Zhou State Key Laboratory of Hydraulics and Mountain River Engineering Sichuan UniversityChengdu610065China College of Water Resource and Hydropower Sichuan UniversityChengdu610065China

In the context of global warming and intensified human activities,glacier instability in plateau regions has increased,and glacier debris flows have become active,which poses a significant threat to the lives and property of people and socioeconomic *** mass movement process of glacier debris flows is extremely complex,so this paper uses the 2018 Sedongpu glacier debris flow event on the Qinghai-Tibet Plateau as an example and applies a numerical simulation method to invert the whole process of mass *** view of the interaction between phases in the process of motion,we use the fluid-solid coupling method to describe the mass *** granular-flow model and drift-flux model are employed in FLOW3D software to study the mass movement process of glacier debris flows and explore their dynamic *** results indicate that the glacier debris flow lasted for 700 s,and the movement process was roughly divided into four stages,including initiation,scraping,surging and deposition;the depositional characteristics calculated by the fluid-solid coupling model are consistent with the actual survey results and have good reliability;strong erosion occurs during the mass movement,the clear volume amplification effect,and the first wave climbs 17.8 m across the *** fluid-solid coupling method can better simulate glacier debris flows in plateau regions,which is helpful for the study of the mechanism and dynamic characteristics of such disasters.

关键词： glacial debris flow Qinghai-Tibet Plateau fluid-solid coupling FLOW3D mass movement depositional characteristics disasters engineering geology

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Silicone oil migrating into the conjunctival space and orbit after surgery for an eye-penetrating injury:A case report

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World Journal of Clinical Cases 2024年第19期12卷 3950-3955页

作者： Ben-Liang Shu Hong-yun Wu yu-xiang hu Jie Rao Bin Wei Qin-Yi huang Xiao-Rong Wu Department of Ophthalmology The First Affiliated Hospital of Nanchang UniversityNanchang 330006Jiangxi ProvinceChina Department of Ophthalmology Ganzhou People's HospitalGanzhou 341000Jiangxi ProvinceChina

BACKGROUND We report a case of eye-penetrating injury in which a massive silicone oil migration into the patient’s subconjunctival space and orbit occurred after *** SUMMARY A 30-year-old male patient sought medical attention at Ganzhou People’s Hospital after experiencing pain and vision loss in his left eye due to a nail wound on December 9,*** of penetrating injury caused by magnetic foreign body retention in the left eye and hospitalization for *** December 9,2023,pars plana vitrectomy was performed on the left eye for intraocular foreign body removal,abnormal crystal extraction,retinal *** to the discovery of retinal detachment at the posterior pole during surgery,silicone oil was injected to fill the vitreous body,following which upper conjunctival bubble-like swelling was *** orbital computed tomography(CT)review indicated migration of silicone oil to the subconjunctival space and orbit through a self-permeable *** December 18,2023,the patient sought treatment at the First Affiliated Hospital of Nanchang University,*** patient presented with a pronounced foreign body sensation following left eye *** December 20,2023,the foreign body was removed from the left eye frame and an intraocular examination was *** posterior scleral tear had closed,leading to termination of the surgical procedure following supplementary laser treatment around the *** patient reported a significant reduction in ocular surface symptoms just one day after ***,a notable decrease in the migration of silicone oil was observed in orbital CT *** The timing of silicone oil injection for an eye-penetrating injury should be carefully evaluated to avoid the possibility of silicone oil migration.

关键词： Silicone oils Migration Vitrectomy Eye injuries Penetrating Case report

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针灸治疗纤维肌痛:证据图

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World Journal of Acupuncture-Moxibustion 2024年第1期34卷 31-39页

作者：施兰君胡晓艺田紫煜修文萃焦睿珉胡翔昱岗卫娟景向红中国中医科学院针灸研究所北京100700

Objective:The body of research on acupuncture as a treatment strategy for fibromyalgia(FM)is steadily *** evidence map identifies,describes,and summarizes the current status of studies conducted to evaluate the efficacy of acupuncture for FM,identify research gaps,and provide information that could guide the design of future ***:Seven electronic databases–Cochrane Library,PubMed,Embase,China Biomedical Literature Database,VIP,Wanfang Database,and Chinese National Knowledge Infrastructure–were searched for relevant articles on acupuncture for *** search period was from the dates of inception of the databases to December 19,*** clinical studies and systematic reviews on the use of acupuncture-related modalities for the treatment of FM were *** basic information,quality assessments,and evidence maps of the included studies are presented as charts and bubble *** quality assessment tools used for evaluating the different types of studies included in the present study were Cochrane Collaboration’s tool,Canadian Institute of Health Economics quality appraisal tool,and A MeaSurement Tool to Assess systematic Reviews ***:Fifty studies were included in this *** these,39(78.00%)were randomized controlled trials(RCTs),6(12.0%)were case series,and 5(10.0%)were systematic *** included studies focused on manual acupuncture and conventional treatment in the treatment and control groups,*** outcomes analyzed in the RCTs included pain(94.9%),sleep quality(46.2%),depression(46.2%),physical function(46.2%),stiffness(35.9%),well-being(35.9%),work status(35.9%),anxiety(33.3%),fatigue(33.3%),quality of life(17.9%),and overall effective rate(10.3%).The methodological quality of most of the studies was low or critically low regardless of the study *** most studies,the therapeutic effect of acupuncture was significantly superior to that of the comparator.

关键词： Acupuncture Fibromyalgia Evidence map

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Preface to the special issue on advanced preparation of tungsten-related materials and their applications

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Tungsten 2020年第4期2卷 335-336页

作者： yu‑xiang hu Lian‑Zhou Wang School of Chemical Engineering and Australian Institute Bioengineering and Nanotechnology Nanomaterials CentreThe University of QueenslandBrisbaneQLD 4072Australia

Tungsten and related metals,including cobalt,molybdenum,vanadium,as well as their compounds,were an important group of materials to the sustainable development of our *** materials hold the key on various devices,much effort has been devoted to designing a large library of advanced tungsten-related metals and compounds to improve the devices performance,including fusion reactors and energy storage and conversion(ESC)devices.

关键词： metals preparation devoted

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An analysis of F-doping in Li-rich cathodes

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Rare Metals 2022年第6期41卷 1771-1796页

作者： Trent Seaby Tong-En Lin yu-xiang hu Qing-Hong yuan Lian-Zhou Wang Nanomaterials Centre School of Chemical Engineering and Australian Instiutle for Bioengineering and Nanotec hnologyThe University of QucenslandBrisbane QLD 4072Australia Key Laboratory of Advanced Functional Materials Education Ministry of China.Faculty of Materials and ManufacturingBeijing University of TechnologyBeijing 100124 China Centrefor Theoretical and Computational MolecularScience Australian Institute for Bioengineering and Nanotechnology The University of QueenslandBrisbane QLD 4072Australia

Li-rich materials,due to their high capacity(>250 mAh·g^(-1)),have recently been considered as an alternative to the current generation of cathode materials for Li-ion batteries(LIBs).However,their inferior cycling stability limits their practical *** is a common technique to solve this ***,anion doping remains relatively ***(F)is one of the most effective anion dopants owning to the improved capacity,cycling stability,and rate performance in *** explanations and experimental results,however,vary significantly from study to ***,we find that bulk F-doping significantly improves both rate performance and cycling stability,likely driven by charge compensation and greater ***,bulk F-doping occasionally improves capacity via enhanced activation and occasionally decreases capacity by preventing activation from *** F-doping has similar effects to bulk F-doping on capacity and stability,while significantly hindering the rate ***,the improvements in surface-doped materials do not appear to be a result of specific surface modification,and instead can be ascribed to the effect of fluorine on the near-surface bulk *** understanding of fluo-rine's influence on activation,in particular,is required to unlock the full potential of synergistic cation/anion co-doping.

关键词： Li-rich materials Fluorine dopingi Normalization analysis Electrochemical performance

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A virtual service placement approach based on improved quantum genetic algorithm

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Frontiers of Information Technology & Electronic Engineering 2016年第7期17卷 661-671页

作者： Gang XIONG yu-xiang hu Le TIAN Ju-long LAN Jun-fei LI Qiao ZHOU National Digital Switching System Engineering&Technological Research Center Zhengzhou 450002China Department of Mathematics and Computer Science University of AntwerpAntwerp 2020Belgium

Despite the critical role that middleboxes play in introducing new network functionality,management and innovation of them are still severe challenges for network operators,since traditional middleboxes based on hardware lack service flexibility and ***,though new networking technologies,such as network function virtualization(NFV) and softwaredefined networking(SDN),are considered as very promising drivers to design cost-efficient middlebox service architectures,how to guarantee transmission efficiency has drawn little attention under the condition of adding virtual service process for ***,we focus on the service deployment problem to reduce the transport delay in the network with a combination of NFV and ***,a framework is designed for service placement decision,and an integer linear programming model is proposed to resolve the service placement and minimize the network transport *** a heuristic solution is designed based on the improved quantum genetic *** results show that our proposed method can calculate automatically the optimal placement *** scheme can achieve lower overall transport delay for a network compared with other schemes and reduce 30% of the average traffic transport delay compared with the random placement scheme.

关键词： Software-defined networking(SDN) Network function virtualization Quantum genetic algorithm Middlebox

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Behavior of liquid passing through deadman:influence of slag/iron ratio and unburned pulverized coal

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Journal of Iron and Steel Research International 2021年第9期28卷 1095-1104页

作者： Lei Zhang Jian-liang Zhang xiang-yu hu Zheng-jian Liu Heng-bao Ma Ke-xin Jiao School of Metallurgical and Ecological Engineering University of Science and Technology BeijingBeijing 100083China State Key Laboratory of Advanced Metallurgy University of Science and Technology BeijingBeijing 100083China

The ability of a blast furnace hearth liquid(iron and slag)passing through deadman characterizes the activity of the blast furnace *** explore the influence of various factors on the static holdup rate of liquid in the process of passing through the deadman,a physical transport model of liquid passing through the deadman was firstly ***,a self-designed experimental device was used to simulate the process,and the influences of slag/iron ratios(250–450 kg/t)and unburned coal content(0%–9%)on the static holdup rate were *** experimental results indicate that with the slag/iron ratio increasing,the behavior of liquid passing through the coke packed bed gets much more difficult,and the static holdup rate *** the content of unburned pulverized coal(UPC)increases,the static holdup rate decreases first and then *** is caused by the dual effects of *** the one hand,UPC can promote the carburizing reaction of unsaturated molten iron,thereby improving the fluidity of molten iron and reducing the static holdup *** the other hand,when the content of UPC rises to a certain level,it will be regarded as a kind of solid particle which will increase the liquid viscosity,causing an increase in the static holdup ***,the liquid and coke will present interfacial chemical reactions when the liquid flows through the coke packed *** the Si-containing iron droplets at the slag–coke interface,generated by the reaction of SiO_(2)with C in the coke,can improve the interface wettability by reducing the interface wetting angle and increase the basicity of slag by consuming SiO_(2),thus improving the fluidity of the liquid and reducing the static holdup rate.

关键词： Blast furnace Hearth Liquid holdup Slag/iron ratio Unburned pulverized coal

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The role of tungsten-related elements for improving the electrochemical performances of cathode materials in lithium ion batteries

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Tungsten 2021年第3期3卷 245-259页

作者： Yong-Qi Sun Weng Fu yu-xiang hu James Vaughan Lian-Zhou Wang Nanomaterials Centre School of Chemical Engineering and Australian Institute for Bioengineering and NanotechnologyThe University of QueenslandBrisbaneQLD 4072Australia School of Chemical Engineering The University of QueenslandBrisbaneQLD 4072Australia

Lithium ion batteries using Ni-Co-Mn ternary oxide materials(NCMs)and Ni-Co-Al materials(NCAs)as the cathode materials are dominantly employed to power the electric vehicles(EVs).Increasing the driving range of EVs necessitates an increase of Ni content to improve the energy densities,which,however,degrades the cycle *** we review the doping/coating of tungsten and related elements to improve the electrochemical performance of these cathodes especially the cycle *** selection of tungsten and related elements is based on their special properties including the high valence state,strong bonding with oxygen and the large ionic *** improvement of cycle stability mainly results from two features:(1)the enhancement of bulk structure stability upon doping(Mo,W,Ta,Nb)and(2)the resistance of side reactions of electrode/electrolyte by the surficial layer induced by direct coating(V,W,Nb)or bulk *** the recent high Ni materials,the formation of Ni2+and its migration to the Li layer induced by these doped/coated tungsten-related elements,and the presence of spinel or rock-salt phase before cycling contributes to improving the cycle *** key challenges are the selection of an optimized additive concentration and the fundamental understanding of the reaction mechanism,which will provide insightful guidance for maximizing the electrochemical performance of the state-of-the-art lithium-ion batteries at minimal additional process costs.

关键词： Nickel-cobalt-manganese oxide cathodes Electrochemical performances Tungsten and related elements Doping/coating

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Interregional Value-Added Tax in the Era of E-Commerce: Tax Policy Design Based on Big Data from Online Retailing

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Journal of Social Computing 2024年第1期5卷 46-57页

作者： yu Chen Luwei xiang hu Yang School of Public Finance and Taxation Central University of Finance and EconomicsBeijing 100008China School of Management and Economics The Chinese University of Hong KongShenzhen 518172China School of Information Central University of Finance and EconomicsBeijing 100008China

The value-added tax(VAT)in China is levied and allocated based on the origin *** the background of the increasing substitution of online retail for traditional offline retail,this mechanism will exacerbate the disparity of regional tax revenue,and intensify tax competition among local ***,reconsidering the allocation mechanism of value-added tax in China can be an important policy decision,and it is influenced by various economic and social ***,we utilize large-scale retail transaction data from an e-commerce platform to measure regional disparities in retail and consumption among different regions and then reveals present tax policy results in revenue imbalance in different ***,we establish a model based on game theory to illustrate how the origin principle leads to fierce tax competition among ***,by establishing and solving tax allocation models between local governments and the central government,this study simulates and calculates the degree of revenue imbalance under different scenarios and attempts to propose policy *** results indicate that implementing the destination principle will reduce regional tax ***,adjusting the allocation ratio between the central government and local governments based on city levels is advantageous for further reducing regional tax revenue disparities.

关键词： value-added tax e-commerce destination principle origin principle

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Near real-time gravitational wave data analysis of the massive black hole binary with TianQin

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Science China(Physics,Mechanics & Astronomy) 2024年第7期67卷 175-186页

作者： Hong-yu Chen xiang-yu Lyu En-Kun Li Yi-Ming hu MOE Key Laboratory of TianQin Mission TianQin Research Center for Gravitational Physics&School of Physics and AstronomyFrontiers Science Center for TianQinGravitational Wave Research Center of CNSASun Yat-sen University(Zhuhai Campus)Zhuhai 519082China

Space-borne gravitational wave(GW)detectors can detect the merger of massive black *** early warning and localization of GW events before merging can be used to inform electromagnetic telescopes and conduct multimessenger ***,this requires real-time data transmission and analysis *** geocentric orbit of the space-borne GW detector Tian Qin makes it possible to conduct real-time data *** this study,we develop a search and localization pipeline for massive black hole binaries(MBHBs)with Tian Qin under both regular and real-time data transmission *** demonstrate that,with real-time data transmission,MBHBs can be accurately localized on the *** the approaching merger,each analysis can be finished in only 40 *** an MBHB system at a distance of 1 Gpc,if we receive data every hour,then we can pinpoint its location to within less than 1 deg^(2)on the final day before the merger.

关键词： gravitational wave detectors and experiments black holes data analysis algorithms and implementation data management

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