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Superplasticity of fine-grained mg-10Li alloy prepared by severe plastic deformation and understanding its deformation mechanisms

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journal of magnesium and Alloys 2024年第1期12卷 316-331页

作者： h.t.jeong S.W.Lee W.j.Kim Department of materials Science and Engineering Hongik UniversityMapo-guSangsu-dong 72-1Seoul 121-791Republic of Korea

the superplastic behavior and associated deformation mechanisms of a fine-grained mg-10.1 Li-0.8Al-0.6Zn alloy(LAZ1011)with a grain size of 3.2μm,primarily composed of the BCCβphase and a small amount of the hCPαphase,were examined in a temperature range of 473 K to 623 *** microstructural refinement of this alloy was achieved by employing high-ratio differential speed *** best superplasticity was achieved at 523 K and at strain rates of 10^(-4)-5×10^(-4)s^(-1),where tensile elongations of 550±600%were *** the heating and holding stage of the tensile samples prior to tensile loading,a significant increase in grain size was observed at temperatures above 573 ***,it was important to consider this effect when analyzing and understanding the superplastic deformation behavior and *** the investigated strain rate range,the superplastic flow at low strain rates was governed by lattice diffusion-controlled grain boundary sliding,while at high strain rates,lattice diffusion-controlled dislocation climb creep was the rate-controlling deformation *** was concluded that solute drag creep is unlikely to *** the late stages of deformation at 523 K,it was observed that grain boundary sliding led to the agglomeration of theαphase,resulting in significant strain *** mechanism maps were constructed forβ-mg-Li alloys in the form of 2D and 3D formats as a function of strain rate,stress,temperature,and grain size,using the constitutive equations for various deformation mechanisms derived based on the data of the current tests.

关键词： magnesium-lithium alloy Superplasticity Severe plastic deformation Grain size Grain growth

进一步改善城市网-厂-水体污水系统升级改造和运行效率的四点看法

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给水排水 2024年第4期50卷 137-144页

作者：曹业始 KROISS h van LOOSDRECht m DAIGGER G t 中持新概念环境发展宜兴有限公司宜兴214213 维也纳工业大学水质和资源管理研究所奥地利维也纳1040 代尔夫特理工大学生物技术系荷兰代尔夫特2629HZ 密歇根大学土木和环境工程系美国密歇根州48109

2022年,《深入打好城市黑臭水体治理攻坚战实施方案》发布,要求努力解决河流雨后黑臭和雨季河流断面水质下降问题,力争到2025年,进水BOD浓度高于100毫克/升的城市生活污水处理厂规模占比达90%以上,城市生活污水集中收集率达到70%以上。... 详细信息

2022年,《深入打好城市黑臭水体治理攻坚战实施方案》发布,要求努力解决河流雨后黑臭和雨季河流断面水质下降问题,力争到2025年,进水BOD浓度高于100毫克/升的城市生活污水处理厂规模占比达90%以上,城市生活污水集中收集率达到70%以上。水行业正面临着防止雨后河流返黑和改善雨季河流水质等新任务。因此,结合近年来成绩、实践和欧美的经验教训,提出和讨论了与进一步改善网-厂-水体城市污水系统升级改造及运行效率相关的四个问题:分流制管网有没有外(雨)水入侵和溢流、污水处理厂的进水浓度应多高、为什么部分污水处理厂需局部扩容、为什么污水管道中流速低于自净流速,并在此基础上,对相关工作提出了建议。

关键词：城市污水系统污水管网外水入侵雨水溢流污水浓度污水处理厂扩容水环境容量

Clinical-based phenotypes in children with pediatric post-COVID-19 condition

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World journal of Pediatrics 2024年第7期20卷 682-691页

作者： Lieke C.E.Noij jelle m.Blankestijn Coen R.Lap marlies A.van houten Giske Biesbroek Anke-hilse maitland-van der Zee mahmoud I.Abdel-Aziz johannes B.van Goudoever mattijs W.Alsem Caroline L.h.Brackel Kim j.Oostrom Simone hashimoto Suzanne W.j.terheggen-Lagro Department of Pediatric Pulmonology and Allergy Amsterdam UMCLocation AMCEmma Children’s HospitalAmsterdam University Medical CenterRoom G2-222Meibergdreef 91105AZAmsterdamThe Netherlands Department of Pulmonary medicine Amsterdam UMCAmsterdamThe Netherlands Department of Pediatrics Spaarne GasthuisHoofddorpThe Netherlands Department of Pediatrics Emma Children’s HospitalAmsterdam University Medical CenterAmsterdamThe Netherlands Department of Rehabilitation medicine Amsterdam Movement SciencesMeibergdreef 9AmsterdamThe Netherlands Department of Paediatric Pulmonology Department of PaediatricsTergooi MCHilversumThe Netherlands Department of Child and Adolescent Psychiatry and Psychosocial Care Amsterdam UMCAmsterdam Reproduction and DevelopmentAmsterdamThe Netherlands

Background Pediatric post coronavirus disease 2019(COVID-19)condition(PPCC)is a heterogeneous syndrome,which can significantly affect the daily lives of *** study aimed to identify clinically meaningful phenotypes in children with PPCC,to better characterize and treat this *** Participants were children with physician-diagnosed PPCC,referred to the academic hospital Amsterdam UmC in the Netherlands between November 2021 and march *** factors and information on post-COVID symptoms,comorbidities,and impact on daily life were *** clusters were identified using an unsupervised and unbiased approach for mixed data *** Analysis of 111 patients(aged 3–18 years)revealed three distinct clusters within *** 1(n=62,median age=15 years)predominantly consisted of girls(74.2%).these patients suffered relatively more from exercise intolerance,dyspnea,and smell *** 2(n=33,median age=13 years)contained patients with an even gender distribution(51.5%girls).they suffered from relatively more sleep problems,memory loss,gastrointestinal symptoms,and *** 3(n=16,median age=11 years)had a higher proportion of boys(75.0%),suffered relatively more from fever,had significantly fewer symptoms(median of 5 symptoms compared to 8 and 10 for clusters 1 and 2 respectively),and experienced a lower impact on daily *** this study identified three distinct clinical PPCC phenotypes,with variations in sex,age,symptom patterns,and impact on daily *** findings highlight the need for further research to understand the potentially diverse underlying mechanisms contributing to post-COVID symptoms in children.

关键词： Adolescents Clusters Long COVID Pediatric Phenotypes Post-COVID syndrome

Positive health:An integrated quantitative approach in patients with chronic gastrointestinal and hepato-pancreatico-biliary disorders

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World journal of Gastroenterology 2024年第28期30卷 3418-3427页

作者： Anja h W m Lemlijn-Slenter Karolina AP Wijnands Gijs van der hamsvoort Luuk P van Iperen Nico Wolter Angelique E de Rijk Ad Am masclee Department of Social medicine Faculty of HealthMedicine and Life sciencesCare and Public Health Research Institute Maastricht UniversityMaastricht 6200 MDLimburgNetherlands Division of Gastroenterology and hepatology Department of Internal MedicineSchool of Nutrition and Translational Research in MetabolismMaastricht 6200 MDLimburgNetherlands Social medical Affairs Employee Insurance Agency(UWV)Heerlen 6400 ACLimburgNetherlands Department of Research Academic Knowledge Center Work and Health South-East Netherlands(AKAG-ZON)Heerlen 6400 ACLimburgNetherlands

BACKGROUND the concept of positive health(Ph)supports an integrated approach for patients by taking into account six dimensions of *** approach is especially relevant for patients with chronic *** gastrointestinal and hepatopancreatico-biliary(GI-hPB)disorders are among the top-6 of the most prevalent chronically affected organ *** impact of chronic GI-hPB disorders on individuals may be disproportionally high because:(1)the affected organ system frequently contributes to a malnourished state;and(2)persons with chronic GIhPB disorders are often younger than persons with chronic diseases in other organ *** to describe and quantify the dimensions of Ph in patients with chronic GI-hPB *** Prospective,observational questionnaire study performed between 2019 and 2021 in 235 patients with a chronic GIhPB disorder attending the Outpatient Department of the maastricht University medical *** questionnaires and data from patient files were used to quantify the six dimensions of *** consistency was tested with mcDonald’s ***-order Pearson correlations and t-tests were used to assess associations and differences.A P valuethe GI-hPB patients scored significantly worse in all dimensions of Ph compared to control data or norm scores from the general *** quality of life,participation and daily functioning,GI-hPB patients scored in the same range as patients with chronic disorders in other organ systems,but depressive symptoms(in 35%)and malnutrition(in 45%)were more frequent in patients with chronic GI-hPB *** scores between the six dimensions were only very weak to weak,forcing us to quantify each domain *** All six dimensions of Ph are impaired in the GI-hPB *** and depressive symptoms are more prevalent compared to patients with chronic disorders in other organ systems.

关键词： Positive health Chronic gut disorders Gastrointestinal disorders hepato-pancreatico-biliary disorders Integrated care

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腹壁子宫内膜异位mRI表现

国际医学放射学杂志 2010年第4期 400-400页

作者： m.P.h.Busard V.mijatovic C.van Kuijk P.G.A.hompes j.h.t.m.van waesberghe 郭丽君 Department of Radiology Endometriosis Center VUMCVU Medical CenterDe Boelelaan 11171081 HV AmsterdamThe Netherlands

目的腹壁子宫内膜异位简称AWE,指子宫内膜组织异位于腹膜以外腹壁,因其征象与很多疾病类似,故诊断较困难,本研究目的在于描述AWE mRI表现。方法收集10例AWE病人共12个病

关键词：子宫内膜异位腹壁 AWE mRI

Supramolecular Polymerization of hydrogen-Bonded trimers in Bulk and Aqueous medium

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CCS Chemistry 2024年第6期6卷 1458-1465页

作者： Freek V.de Graaf Stef A.h.jansen Sandra m.C.Schoenmakers Bas van Genabeek marle E.j.Vleugels Bart W.L.van den Bersselaar E.W.meijer Ghislaine vantomme Institute for Complex molecular Systems Laboratory of Macromolecular and Organic ChemistryEindhoven University of Technology5600 MBEindhoven School of Chemistry and RNA Institute University of New South WalesSydneyNew South Wales 2052

Synthetic molecules that form functional noncovalent assemblies in water have received much attention for their potential applications as *** this work,we introduce a novel water-compatible monomer based on the phthalhydrazide moiety that assembles into hydrogen-bonded trimeric *** bulk,the material exhibits a cylindrical nanostructure in the liquid-crystalline phase at elevated temperatures,morphologically distinct from the crystalline lamellar *** water,these molecules effectively form cylinders in a one-dimensional fashion,yielding fibrous *** formation of these supramolecular polymers follows a cooperative mechanism,as evidenced by denaturation *** trimerized pattern represents a new category of aqueous su pramolecular polymers with future prospects for functional complex molecular systems.

关键词： noncovalent chemistry supramolecular polymers hydrogen bonding cooperativity nanostructure

Impact of device resistances in the performance of graphene‑based terahertz photodetectors

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Frontiers of Optoelectronics 2024年第2期17卷 87-97页

作者： O.Castelló Sofía m.López Baptista K.Watanabe t.taniguchi E.Diez j.E.Velázquez-Pérez Y.m.meziani j.m.Caridad j.A.Delgado-Notario Department of Applied Physics University of Salamanca37008 SalamancaSpain Unidad de Excelencia en Luz y materia Estructurada(LUmES) University of Salamanca37008 SalamancaSpain Research Center for Electronic and Optical materials National Institute for Materials Science1-1 NamikiTsukuba 305-0044Japan Research Center for materials Nanoarchitectonics National Institute for Materials Science1-1 NamikiTsukuba 305-0044Japan Nanotechnology Group USAL-NanolabUniversity of Salamanca37008 SalamancaSpain

In recent years,graphene field-effect-transistors(GFEts)have demonstrated an outstanding potential for terahertz(thz)photodetection due to their fast response and *** features are essential to enable emerging thz applications,including 6G wireless communications,quantum information,bioimaging and ***,the overall performance of these photodetectors may be utterly compromised by the impact of internal resistances presented in the device,so-called access or parasitic *** this work,we provide a detailed study of the influence of internal device resistances in the photoresponse of high-mobility dual-gate GFEt *** dual-gate architectures allow us to fine tune(decrease)the internal resistance of the device by an order of magnitude and consequently demonstrate an improved responsivity and noise-equivalent-power values of the photodetector,*** results can be well understood by a series resistance model,as shown by the excellent agreement found between the experimental data and theoretical *** findings are therefore relevant to understand and improve the overall performance of existing high-mobility graphene photodetectors.

关键词： Graphene thz Photodetector Field-effect transistor Plasmonic

the CCD instrument background of the SmILE SXI

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Earth and Planetary Physics 2024年第1期8卷 15-24页

作者： m.W.j.hubbard O.hetherington D.j.hall t.W.Buggey S.Parsons t.Arnold A.holland C.Pagani S.Sembay Centre for Electronic Imaging The Open UniversityMilton KeynesMK76AAUK X-ray and Observational Astronomy Group Department of Physics&AstronomyUniversity of LeicesterLE17RHUK

the ESA and CAS SmILE mission orbit is highly elliptical and will pass through multiple radiation *** Soft X-ray Imager(SXI)instrument aboard has a radiation shutter door designed to close when the surrounding radiation flux is *** shutter door will close when passing below an altitude threshold to protect against trapped particles in the Earth’s van Allen ***,two radiation environments can be approximated based on the shutter door position:open and *** instrument background for the CCDs(Charge-Coupled Devices)that form the focal plane array of the SXI were evaluated for the two *** to the correlation of the space environment with the solar cycle,the solar minima and maxima,the background was also evaluated at these two *** results demonstrated that the highest instrument background will occur during solar minima due to the main contributing source being Galactic Cosmic Rays(GCRs).It was also found that the open background was highest for solar minima and that the closed background was highest during solar *** is due to the radiation shutter door acting as a scattering centre and the changes in the energy flux distribution of the GCRs between the two solar extremes.

关键词： instrument background X-ray astronomy space radiation

Ground-based and additional science support for SmILE

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Earth and Planetary Physics 2024年第1期8卷 275-298页

作者： j.A.Carter m.Dunlop C.Forsyth K.Oksavik E.Donovon A.Kavanagh S.E.milan t.Sergienko R.C.Fear D.G.Sibeck m.Connors t.Yeoman X.tan m.G.G.t.taylor K.mcWilliams j.Gjerloev R.Barnes D.D.Billet G.Chisham A.Dimmock m.P.Freeman D.-S.han m.D.hartinger S.-Y.W.hsieh Z.-j.hu m.K.james L.juusola K.Kauristie E.A.Kronberg m.Lester j.manuel j.matzka I.mcCrea Y.miyoshi j.Rae L.Ren F.Sigernes E.Spanswick K.Sterne A.Steuwer t.Sun m.-t.Walach B.Walsh C.Wang j.Weygand j.Wild j.Yan j.Zhang Q.-h.Zhang Planetary Sciences Group School of Physics and AstronomyUniversity of LeicesterUniversity RoadLeicesterLE17RHUK Rutherford Appleton Laboratory Space Science Technology Facilities CouncilOxfordshireUK School of Space and Environment Beihang UniversityBeijing 100191China Key Laboratory of Space Environment monitoring and Information Processing Ministry of Industry and Information TechnologyBeijing 100017China Department of Space and Climate Physics UCLMullard Space Science LaboratoryHolmbury St.MaryDorkingSurreyRH56NTUK Birkeland Centre for Space Science Department of Physics and Technology.University of BergenBergenNorway Department of Physics and Astronomy University of Calgary2500 University DriveCalgaryAlbertaCanada T2N 1N4 British Antarctic Survey CambridgeUK Swedish Institute of Space Physics KirunaSweden West highfield Campus University of SouthamptonUniversity RoadSO171BJUK Goddard Space Flight Center NASAGreenbeltMarylandUSA Athabasca University AthabascaCanada EStEC European Space AgencyNetherlands University of Saskatchewan SaskatoonCanada the johns hopkins University Applied Physics Laboratory LaurelMarylandUSA Swedish Institude of Space Physics UppsalaSE 75121Sweden tongji University Shanghai 200092China Center for Space Plasma Physics Space Science Institute4765 Walnut Street Suite BBoulderColorado80301USA Polar Research Institute of China Shanghai 200136China Finnish meteorological Institute(FmI) Finland Department of Earth and Environmental Sciences(Geophysics) Ludwig Maximilian University of Munich(LMU)MunichTheresienstr.41MunichD-80333Germany Canadian Space Agency MontrealCanada GFZ German Research Centre for Geosciences PotsdamGermany Nagoya University Institute for Space Earth Environment ResearchCenter for Integrated Data ScienceNagoyaAichiJP 464-8601 Northumbria University Newcastle upon TyneTyne and WearUK NE18ST National Space Science Center Chinese Academy SciencesBeijing 100190China Arctic Geophysics University Centre in Svalbard

the joint European Space Agency and Chinese Academy of Sciences Solar wind magnetosphere Ionosphere Link Explorer(SmILE)mission will explore global dynamics of the magnetosphere under varying solar wind and interplanetary magnetic field conditions,and simultaneously monitor the auroral response of the Northern hemisphere *** these large-scale responses with medium and fine-scale measurements at a variety of cadences by additional ground-based and space-based instruments will enable a much greater scientific impact beyond the original goals of the SmILE ***,we describe current community efforts to prepare for SmILE,and the benefits and context various experiments that have explicitly expressed support for SmILE can offer.A dedicated group of international scientists representing many different experiment types and geographical locations,the Ground-based and Additional Science Working Group,is facilitating these *** include constructing an online SmILE Data Fusion Facility,the discussion of particular or special modes for experiments such as coherent and incoherent scatter radar,and the consideration of particular observing strategies and spacecraft *** anticipate growing interest and community engagement with the SmILE mission,and we welcome novel ideas and insights from the solar-terrestrial community.

关键词： magnetosphere ionosphere magnetosphere-ionosphere coupling ground-based experimentation SmILE conjunctions missions