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Acta Metallurgica Sinica(English Letters) 2018年第12期31卷 1361-1367页

作者： y.h.Zhu C.M.Luk Department of Industrial and Systems Engineering TheHong Kong Polytechnic UniversityHong KongChina Department of Applied Physics The Hong Kong PolytechnicUniversityHong KongChina

Electropulsing-induced phase decompositions and microstructural changes in AZO-5 thin films were studied by X-raydiffraction, scanning electron microscopy, atomic force microscopy, hall effect measurement and photoluminescence （PL）measurement techniques. It was found that the electropulsing induced phase decomposition started with spinodaldecomposition, which was accompanied by discontinuous precipitation in the AZO-5 thin films. Both circular phasedecompositions and the crystal orientation occurred. Inappropriate electropulsing might damage zones, which resulted intremendous decrease in electrical conductivity. Circular changes in both the peak position and the width of the PLwavelength were observed in the EPT AZO-5 thin films. Formation of zones favored reducing the roughness of the thinfilm.

关键词： Electropulsing Phase transformation Electrical conductivity Photoluminescence Thin-films AZO

Psychosocial determinants of irritable bowel syndrome

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World Journal of Gastroenterology 2012年第7期18卷 616-626页

作者： Teodora Surdea-Blaga Adriana Bban Dan L Dumitrascu 2nd Medical Department University of Medicine and Pharmacy IuliuHatieganuCluj-Napoca 400006Romania Department of Psychology Babes-Bolyai UniversityCluj-Napoca 400006Romania

From a pure motor disorder of the bowel,in the past few years,irritable bowel syndrome (IBS) has become a multifactorial disease that implies visceral hypersensitivity,alterations at the level of nervous and humoral communications between the enteric nervous system and the central nervous system,alteration of the gut microflora,an increased intestinal permeability and minimum intestinal *** and social factors can interfere with the communication between the central and enteric nervous systems,and there is proof that they are involved in the onset of IBS and influence the response to treatment and *** is evidence that abuse history and stressful life events are involved in the onset of functional gastrointestinal *** order to explain clustering of IBS in families,genetic factors and social learning mechanisms have been *** psychological features,such as anxiety,depression as well as the comorbid psychiatric disorders,health beliefs and coping of patients with IBS are discussed in relation to the symptoms and outcome.

关键词： Anxiety Depressive symptoms Irritablebowel syndrome Personality Psychosocial factors Sexual abuse Stressful events

A novel Mg-Gd-y-Zn-Cu-Ni alloy with excellent combination of strength and dissolution via peak-aging treatment

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Journal of Magnesium and Alloys 2023年第2期11卷 720-734页

作者： y.h.Liu Z.R.Zhang J.Wang y.Li h.X.Li L.y.Jia J.h.Wang J.S.Zhang State Key Laboratory for Advanced Metals and Materials University of Science and Technology BeijingBeijing 100083China Dekai Intelligent Casting Co. Ltd.Hebei 072750China

Inferior absolute strength and dissolution properties are the main bottlenecks for the widespread application of dissolvable magnesium alloys in complex working environments for unconventional oil and gas ***,a novel functional peak-aged Mg-9.5Gd-2.7y-0.9Zn-0.8Cu-0.4Ni(wt.%) alloy for fracturing tools is reported,and it possesses an ultimate tensile strength of 457.6 MPa,ultimate compressive strength of 620.7 MPa and dissolution rate of ~43.7 mg·cm^(-2)·h^(-1) in 3 wt.% KCl solutions at 93℃.The excellent strength of the agedalloy is primarily attributed to the combination of grain refinement,long-period stacking ordered(LPSO) strengthening,and precipitation strengthening induced by stacking fault and β’ phase,among which the precipitation strengthening is *** investigations confirm that the corrosion is triggered from the micro-galvanic coupling between the Mg matrix and the cathodic lamellar and block LPSO ***-shaped corrosion pits along with LPSO phases are subsequently formed,significantly accelerating *** β’ precipitates can effectively improve the strength without compromising the dissolution rate because of their nanoscale *** study provides an excellent material selection for dissolvable fracturing tools and presents a strategy by which a synergistic combination of strength and dissolution rate is achieved via peak-aging treatment.

关键词： Dissolvable magnesium alloy Peak-aging treatment Mechanical properties Micro-galvanic corrosion

MEChANICAL BEhAVIOR OF FCC CRySTAL SIMULATED By 3-D DISCRETE DISLOCATION DyNAMICS

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Acta Metallurgica Sinica(English Letters) 2008年第2期21卷 94-102页

作者： y.yu X.X. Pan y.h. Rong School of Materials Science and Engineering Shanghai Jiaotong University Shanghai 200030 China Institute of Structural Mechanics China Academy of Engineering Physics Mianyang 621900 ChinaManuscript received 31 May 2007

To simulate the mechanical behavior of the FCC crystal with the lower Peierls stress, the stiff property and physical meaning of the differential equation group consisting of dislocation evolution and mechanical state was investigated based on the 3-D discrete dislocation dynamics; the results indicate that the differential equation group is serious stiff, namely the external stress changes more quickly than dislocation evolution. Using the established numerical algorithm, the mechanical behavior of FCC crystal was simulated with the dislocations located in the parallel slip planes, and the effect of strain rate on the dislocation configuration and mechanical behavior, and the sat- uration process of mobile dislocation were discussed. The simulation results indicate that the numerical algorithm can efficiently simulate the dislocation dipole and the low strain rate loading.

关键词： FCC crystal Mechanical behavior Dislocation dynamics Nu-merical simulation

The Adjustment Analysis Method of the Active Surface Antenna Based on Convolutional Neural Network

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Research in Astronomy and Astrophysics 2024年第6期24卷 294-306页

作者： you ban Shang Shi Na Wang Qian Xu Shufei Feng School of Mechanical Engineering Xinjiang UniversityUrumqi 830017China Xinjiang Astronomical Observatory Chinese Academy of SciencesUrumqi 830011China School of Mechanical Engineering Dongguan University of TechnologyDongguan 523808China

Active surface technique is one of the key technologies to ensure the reflector accuracy of the millimeter/submillimeter wave large reflector *** antenna is complex,large-scale,and high-precision equipment,and its active surfaces are affected by various factors that are difficult to comprehensively deal *** this paper,based on the advantage of the deep learning method that can be improved through data learning,we propose the active adjustment value analysis method of large reflector antenna based on deep *** method constructs a neural network model for antenna active adjustment analysis in view of the fact that a large reflector antenna consists of multiple panels spliced *** on the constraint that a single actuator has to support multiple panels(usually 4),an autonomously learned neural network emphasis layer module is designed to enhance the adaptability of the active adjustment neural network *** classical 8-meter antenna is used as a case study,the actuators have a mean adjustment error of 0.00252 mm,and the corresponding antenna surface error is0.00523 *** active adjustment result shows the effectiveness of the method in this paper.

关键词： techniques:radar astronomy telescopes methods:analytical methods:numerical

Evaluating urban development and socio-economic disparity in India through nighttime light data

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Journal of Geographical Sciences 2024年第12期34卷 2440-2456页

作者： yU Jingtong LIU Lingcen ban yifang ZhANG Qian College of Land Science and Technology China Agricultural UniversityBeijing 100083China Division of Geoinformatics KTH Royal Institute of TechnologyStockholm 10044Sweden

Balanced development and the reduction of inequality are central objectives of the United Nations Sustainable Development Goals(SDGs).This study explores the use of Nighttime Light(NTL)brightness and the Nighttime Light Development Index(NLDI)as indicators of socioeconomic development in urban centers,focusing on six Indian *** examines the correlation between these indices and socioeconomic inequality across affluent neighborhoods,urban slums,downtown areas,and general urban areas in 2015,2018,and *** results reveal that lighting brightness in affluent areas can be lower than that in bustling downtowns,due to factors such as lower residential *** challenges the conventional assumption that higher NTL necessarily indicates greater *** study further confirmed significant developmental disparities between well-lit downtowns and poorly illuminated peripheral slum areas,as reflected by lower NLDI ***,the results uncover a phenomenon termed“same value but different spectrum”based on a careful examination of NLDI values of urban centers and their corresponding *** suggests that NLDI alone may not fully capture the complexity of urban development,and that underlying development trajectories,along with on-the-ground realities,must be further *** findings emphasize the importance of applying NLDI for urban internal *** addition,the study highlights the necessity for nuanced urban planning and targeted policy interventions specifically tailored to the unique conditions of different urban areas.

关键词： socio-economic inequality Nighttime Light Development Index(NLDI) regional disparity Indian cities

Sediment Dynamics Subject to Sea Level Rise in the yangtze River Estuary

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Journal of Ocean University of China 2024年第6期23卷 1572-1582页

作者： ChEN Wei ban haoyang MAO Chenhao LIANG huidi JIANG Mingtao School of Marine Engineering Equipment Zhejiang Ocean UniversityZhoushan 316022China Key Laboratory of Ocean Space Resource Management Technology MNRHangzhou 310012China Second Institute of Oceanography MNRHangzhou 310012China School of Mechanics and Engineering Science Shanghai UniversityShanghai 200444China Marine Ecological Restoration and Smart Ocean Engineering Research Center of hebei Province Qinhuangdao 066000China

In this study,a two-dimensional hydrodynamic and sediment transport model is established to quantify the influences of sea level rise on sediment transport in the yangtze River Estuary(yRE).After validation,the model was employed to investigate the sediment transport and seabed evolution under four different scenarios of sea level rise,specifically,0,0.5,1 and 1.5 *** results reveal that there exists a‘transition point(TP)'of SSC in each main channel of *** of the transition point,the suspended sediment concentration(SSC)increases along with the rise in sea level,while downstream of the transition point,SSC decreases as sea level ***,there are also transition points for topography *** maximum scouring rate upstream of the transition points exceeds 4.32% for a 1.5 m rise in sea level,while the maximum deposition rate downstream of the transition points is 2.48%.The sediment fluxes from upstream to downstream in the branches of yRE are enhanced by the rise in sea *** direction of sediment flux in the North Branch reverses downstream as sea level *** sediment flux from the North Channel towards downstream increases significantly,while there is no significant change in sediment flux for South *** deposition in the North Passage is also accelerated by sea level *** addition,the sediment flux from yRE to northern Jiangsu and hangzhou Bay is also weakened by the rise in sea level.

关键词： sea level rise sediment transport erosion and deposition sediment flux

Plastic deformation behavior of Mg97Zn1y2 extruded alloys

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Transactions of Nonferrous Metals Society of China 2010年第7期20卷 1259-1268页

作者： K.hAGIhARA A.KINOShITA y.SUGINO M.yAMASAKI y.KAWAMURA h.y.yASUDA y.UMAKOShI Division of Materials and Manufacturing Science Graduate School of EngineeringOsaka University2-1Yamada-okaSuitaOsaka 565-0871Japan Department of Materials Science Kumamoto University2-39-1KurokamiKumamoto 860-8555Japan National Institute for Materials Science 1-2-1SengenTsukubaIbaraki 305-0047Japan

The mechanical properties of the Mg97Znly2 extruded alloy containing the long-period stacking ordered phase, the so-called LPSO-phase, with a volume fraction of 24%-25%, were examined by compression tests and cyclic tension-compression deformation tests. The plastic behavior of the extruded alloys with compositions of Mg99.2Zn0.2y0.6 and Mg89Zn4y7 （molar fraction, %）, which were almost the same compositions of Mg matrix phase and LPSO phase in Mg97Zn1y2 Mg/LPSO two-phase alloy, respectively, were also prepared. By comparing their mechanical properties, the strengthening mechanisms operating in the Mg97Zn1 y2 extruded alloy were discussed. Existence of the LPSO-phase strongly enhanced the refinement of Mg matrix grain size during extrusion, which led to a large increment of the strength of alloy. In addition, the LPSO-phases, which were aligned along the extrusion direction in Mg97Zn1y2 extruded alloy, acted as hardening phases, just like reinforced fibers.

关键词： plastic deformation yield stress LPSO-phase dislocation twinning

RESEARCh ON REFRACTORy SUPERALLOyS IN ThE hTM 21 PROJECT

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Acta Metallurgica Sinica(English Letters) 2005年第1期18卷 74-80页

作者： y. yamabe-Mitarai h. harada high-Temperature Materials Group National Institute for Materials Science Sengen 1-2-1 Tsukuba Ibaraki 305-0047 JapanHigh-Temperature Materials Group National Institute for Materials Science Sengen 1-2-1 Tsukuba Ibaraki 305-0047 Japan

It was proposed that a new class of alloys based on platinum group metals (PGMs) were called refractory superalloys. These refractory superalloys have an fcc and L12 coherent two-phase structure (similar to that of Ni-based superalloys), high melting temperatures and good potential as structural materials used at temperatures up to 1800 ℃. Our recent results on the microstruc-ture evolution, deformation and fracture behavior of some of these refracotry superalloys, especial Ir- and Rh-base refractory superalloys were reported.

关键词： platinum group metals refractory superalloy microstructure deformation behavior

On M-theory on real toric fibrations

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Communications in Theoretical Physics 2021年第8期73卷 67-74页

作者： A Belhaj h Belmahi M Benali S-E Ennadifi y hassouni y Sekhmani Equipe des Sciences de la matière et du rayonnement ESMaRDépartement de Physique Facultédes SciencesUniversitéMohammed V de RabatMorocco LhEP-MS Département de PhysiqueFaculte des SciencesUniversitéMohammed V de RabatMorocco

Borrowing ideas from elliptic complex geometry, we approach M-theory compactifications on real fibrations. Precisely, we explore real toric equations rather than complex ones exploited in F-theory and related dual models. These geometries have been built by moving real toric manifolds over real bases. Using topological changing behaviors, we unveil certain data associated with gauge sectors relying on affine lie symmetries.

关键词： real fibrations M-theory toric real manifolds affine lie symmetries