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sc元素添加对双辊铸轧Al−Cu−li−Mg−Zr基合金热处理的影响

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Transactions of Nonferrous Metals society of China 2024年第6期34卷 1759-1773页

作者： Rostislav KRÁlÍK Barbora KŘIVsKÁ lucia BAJTOŠovÁ Mykhailo sTOlBCHENKO Mirko sCHAPER Olexandr GRYDIN Miroslav CIEslAR Department of Physics of Materials Faculty of Mathematics and PhysicsCharles UniversityKe Karlovu 512116PragueCzech Republic Department of Materials science Faculty of Mechanical EngineeringUniversity of PaderbornWarburger Straße 10033098PaderbornGermany

提出制备含sc的Al−Cu−li−Mg−Zr基合金带材的工艺方案。即先采用双辊铸轧技术制备近净形状的3 mm厚带材,再对其进行均匀化/固溶处理。研究两种Al−Cu−li−Mg−Zr基双辊铸轧合金,其中一种添加质量分数为0.17%的sc,另一种未添加sc。两种合金... 详细信息

提出制备含sc的Al−Cu−li−Mg−Zr基合金带材的工艺方案。即先采用双辊铸轧技术制备近净形状的3 mm厚带材,再对其进行均匀化/固溶处理。研究两种Al−Cu−li−Mg−Zr基双辊铸轧合金,其中一种添加质量分数为0.17%的sc,另一种未添加sc。两种合金均先在300℃下退火30 min,然后在450℃下退火30 min以及530℃下退火30 min,随后进行室温水淬。前两段退火后组织中生成了细小、弥散的Al_(3)Zr/Al_(3)(sc,Zr)颗粒。最后的退火步骤起到了均匀化/固溶处理的作用。双辊铸轧材料的细小晶粒结构使含有主要合金元素的原始颗粒在较短的退火时间内溶解。缩短保温时间可以限制表面层中li的耗尽和Al_(3)Zr/Al_(3)(sc,Zr)弥散相的明显粗化。铸态含sc材料已经具有明显细小的晶粒结构,而经均匀化/固溶处理后生成的Al_(3)(sc,Zr)弥散相抑制了晶粒在高温下发生粗化。在后续180℃下时效处理后,形成了θʹ(Al_(2)Cu)、T1(Al_(2)Culi)和s'(Al_(2)CuMg)强化相。在峰值时效状态下,屈服强度提高了200 MPa,这一数值与类似直接冷却铸造材料的相当,从而证实了所提方案的合理性。

关键词：显微组织力学性能 Al−Cu−li基合金 sc合金化双辊铸轧

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sPEED:an integrated,smartphone-operated,handheld digital PCR Device for point-of-care testing

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Microsystems & Nanoengineering 2024年第3期10卷 149-158页

作者： Haoqing Zhang Xiaocheng liu Xinlu Wang Zhiqiang Yan Ying Xu Martina Gaňová TomášŘezníček Marie Korabečná Pavel Neuzil Ministry of Education Key laboratory of Micro and Nano systems for Aerospace School of Mechanical EngineeringNorthwestern Polytechnical University127 West Youyi RoadXi’anShaanxi 710072PR China The Key laboratory of Biomedical Information Engineering of the Ministry of Education School of Life Science and TechnologyXi’an Jiaotong UniversityXi’anShaanxi 710049PR China Bioinspired Engineering and Biomechanics Center(BEBC) Xi’an Jiaotong UniversityXi’an 710049PR China school of Marine science and Technology Northwestern Polytechnical UniversityXi’anShaanxi 710072PR China Central European Institute of Technology Brno University of TechnologyPurkyňova 12361300 BrnoCzech Republic ITD Tech s.R.O Osvoboditelu100573581 BohumínCzech Republic Institute of Biology and Medical Genetics First Faculty of MedicineCharles University and General University Hospital of PragueAlbertov 412800 PragueCzech Republic

This study elaborates on the design,fabrication,and data analysis details of sPEED,a recently proposed smartphonebased digital polymerase chain reaction(dPCR)*** dPCR chips incorporate partition diameters ranging from 50μm to 5μm,and these partitions are organized into six distinct blocks to facilitate image *** to the superior thermal conductivity of si and its potential for mass production,the dPCR chips were fabricated on a si substrate.A temperature control system based on a high-power density Peltier element and a preheating/cooling PCR protocol user interface shortening the thermal cycle *** optical design employs four 470 nm light-emitting diodes as light sources,with filters and mirrors effectively managing the light emitted during *** algorithm is utilized for image processing and illumination nonuniformity correction including conversion to a monochromatic format,partition identification,skew correction,and the generation of an image correction *** validated the device using a range of deoxyribonucleic acid targets,demonstrating its potential applicability across multiple ***,we provide guidance and verification of the design and testing of the recently proposed sPEED device.

关键词： correction smart testing

Is It about a Bicycle? A Posthumanist Perspective on the Role of Women’s Bicycles in WWII Resistance Movements

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sociology study 2024年第4期14卷 198-211页

作者： Zuzana Križalkovičová Academy of Fine Arts Vienna Austria

Drawing upon Donna Haraway’s cyborg theory,this paper argues that the bicycle can be conceived as a cyborg extension of body and identity which transcended its mechanical essence to become an integral co-partner for women involved in resistance activities in *** specifically,the study explores how women used cycling during World War Ⅱ not only for mobility but as a profound expression of courage,endurance and solidarity which enabled them to overcome physical and symbolic barriers under totalitarian *** bicycle emerges not only as a central co-agent but also actively co-creates the situations in which it emerges as a transformative *** acted as a catalyst for personal and collective empowerment,fostering new subjectivities while transcending physical and social *** study sparks multidimensional discourse on how technological tools can co-create our societies and identities,offering insights into how bicycles can drive socio-political change,promote emancipation and foster inclusivity.

关键词： bicycle female involvement in World WarⅡresistance movements cyborg theory

Changes in the adult sex ratio of six duck species breeding populations over two decades

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Avian Research 2024年第2期15卷 202-210页

作者： Monika Homolkova Petr Musil Diego Pavon-Jordan Dorota Gajdosova Zuzana Musilova sarka Neuzilova Jan Zouhar Department of Ecology Faculty of Environmental SciencesCzech University of Life Sciences PragueKamýcka 129CZ-16521Prague–SuchdolCzech Republic Department of Terrestrial Ecology Norwegian Institute for Nature Research(NINA)PO Box 5685 TorgardenTrondheimN-7485Norway Department of Econometrics Faculty of Informatics and StatisticsUniversity of Economicsnam.W.Churchilla 4CZ-13067Prague 3Czech Republic

Despite all efforts,long-term changes in the adult sex ratios of breeding duck populations are still unclear;this uncertainty is especially true for male-bias populations,which are often under the scrutiny of researchers lacking convenient results for the active protection of endangered *** with male-bias populations are usually strongly affected by a decline in population size that leads to a higher extinction *** this study,we examined our long-term data of the abundance of breeding populations in six duck species(Mallard Anas platyrhynchos,Gadwall Mareca strepera,Red-crested Pochard Netta rufina,Common Pochard Aythya ferina,Tufted Duck Aythya fuligula,and Common Goldeneye Bucephala clangula)from fishponds in south Bohemia,Czechia,between 2004 and *** evidence was used to assess long-term changes in the adult sex ratio in these breeding populations and investigate the possible effects of the NAO index(North Atlantic Oscillation index)on them,indicating climate conditions in *** determined a long-term decrease of the proportion of females in the breeding season in two of the six examined species:Common Pochard and Red-crested Pochard,which is driven by the long-term increase in the number of males in contrast to the decreasing or stable number of females likely caused by different migration behaviours between females and *** the case of Common Pochard,in breeding populations,we estimated 60-65%of males in the early 2000s rising to 75-80%in the early ***,we establish no significant effects linked to climate conditions of the previous winter in these species as a crucial cause of the changes of the proportion of females in the breeding population.

关键词： Adult sex ratio Breeding population Population dynamics Red-listed species Waterfowl Winter weather conditions

Anisotropy effect on strengths of metamorphic rocks

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Journal of Rock Mechanics and Geotechnical Engineering 2018年第1期10卷 164-175页

作者： Ahmet ?zbek Murat Gül Ergun Karacan ovünc Alca Department of Geological Engineering Kahramanmaras Sutcu Imam UniversityAvsar CampusKahramanmarasTurkey Department of Geological Engineering Mugla Sltkl Kocman UniversityMuglaTurkey

This paper aims to study the effect of anisotropy on strengths of several metamorphic rocks of southern(Cine) submassif of Menderes metamorphic massif in southwest Turkey. Four different metamorphic rocks including foliated phyllite, schist, gneiss and marble(calcschist) were selected and *** surveys were made along lines for each rock and evaluated with DIPs program. l-type schmidt hammer was applied in the directions parallel and perpendicular to foliation during the field study. several hand samples and rock blocks were collected during the field study for measurements of dry and saturated densities, dry and saturated unit weights and porosity, and for petrographic analysis and strength determination in laboratory. l-and N-type schmidt hammers were applied in the directions perpendicular(anisotropy angle of 0°) and parallel(anisotropy angle of 90) to the foliation on selected blocks of phyllite, schist, gneiss and marble(calcschist). The phyllite and schist have higher porosity and lower density values than the other rocks. However, coarse crystalline gneiss and marble(calcschist) have higher rebound values and strengths, and they are classified as strong-very strong rocks. Generally, the rebound values in the direction perpendicular to the foliation are slightly higher than that in the direction parallel to foliation. Rebound values of N-type schmidt hammer are higher than the l-type values except for phyllite. sometimes, the rebound values of laboratory and field applications gave different results. This may result from variable local conditions such as minerals differentiation,discontinuities, water content, weathering degree and thickness of foliated structure.

关键词： Rock anisotropy Field survey schmidt hammer rebound values southwest Turkey

Neuroprotective agents effective against radiation damage of central nervous system

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Neural Regeneration Research 2022年第9期17卷 1885-1892页

作者： Mária lalkovičová laboratory of Radiation Biology Joint Institute for Nuclear ResearchDubnaRussia slovak Academy of sciences Institute of Experimental PhysicsKošiceSlovakia

Ionizing radiation caused by medical treatments,nuclear events or even space flights can irreversibly damage structure and function of brain *** can result in serious brain damage,with memory and behavior disorders,or even fatal oncologic or neurodegenerative *** used treatments and drugs are mostly targeting biochemical processes of cell apoptosis,radiation toxicity,neuroinflammation,and conditions such as cognitive-behavioral disturbances or others that result from the radiation *** most drugs,the side effects and potential toxicity are also to be ***,many agents have not been approved for clinical use *** this review,we focus on the latest and most effective agents that have been used in animal and also in the human research,and clinical *** could have the potential therapeutical use in cases of radiation damage of central nervous system,and also in prevention considering their radioprotecting effect of nervous tissue.

关键词： antioxidants biomedical neuroprotectants central nervous system ionizing radiation neuroprotection radiation injury radiomitigators radioprotectants radioprotection therapeutics

Predicting the output error of the suboptimal state estimator to improve the performance of the MPC-based artificial pancreas

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Control Theory and Technology 2023年第4期21卷 541-554页

作者： Martin Dodek Eva Miklovičová Institute of Robotics and Cybernetics Faculty of Electrical Engineering and Information TechnologySlovak University of Technology in BratislavaIlkovičova 3Bratislava81219Slovakia

The error of single step-ahead output prediction is the information traditionally used to correct the state estimate while exploiting the new measurement of the system ***,its dynamics and statistical properties can be further studied and exploited in other *** is known that in the case of suboptimal state estimation,this output prediction error forms a correlated sequence,hence it can be effectively predicted in real *** a suboptimal scenario is typical in applications where the process noise model is not known or it is ***,the paper deals with the problems of analytical and empirical modeling,identification,and prediction of the output error of the suboptimal state estimator for the sake of improving the output prediction accuracy and ultimately the performance of the model predictive *** improvements are validated on an empirical model of type 1 diabetes within an in-silico experiment focused on glycemia prediction and implementation of the MPC-based artificial pancreas.

关键词： suboptimal state estimation Prediction Autoregressive model Moving average model Model predictive control Diabetes mellitus Artificial pancreas

super d-antimagic labelings of Disconnected Plane Graphs

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Acta Mathematica sinica,English series 2010年第12期26卷 2283-2294页

作者： Martin BAA Mirka MIllER Oudone PHANAlAsY Andrea sEMANIov-FEovKov Department of Applied Mathematics Technical University school of Electrical Engineering and Computer science The University of Newcastle Department of Mathematics University of West Bohemia Department of Computer science King's College London Department of Mathematics National University of Laos

This paper deals with the problem of labeling the vertices, edges and faces of a plane graph in such a way that the label of a face and the labels of the vertices and edges surrounding that face add up to a weight of that face, and the weights of all s-sided faces constitute an arithmetic progression of difference d, for each s that appears in the graph. The paper examines the existence of such labelings for disjoint union of plane graphs.

关键词： Plane graph d-antimagic labeling super d-antimagic labeling disjoint union of graphs

Adsorption of Naphthol Green B on unburned carbon：2-and3-parameter linear and non-linear equilibrium modelling

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Chinese Journal of Chemical Engineering 2017年第1期25卷 37-44页

作者： lucie Bartoňová lucie Ruppenthalová Michal Ritz VsB-Technical University of Ostrava Faculty of Metallurgy and Material Engineering Department of Chemistry Tr. 17. listopadu 15 708 33 Ostrava Poruba Czech Republic VsB-Technical University of Ostrava Sustainable Development of Centre ENET Tr. 17. listopadu 15 708 33 Ostrava Poruba Czech Republic VsR-Technical University of Ostrava Regional Materials Science and Technology Centre Tr. 17. listopadu 15 708 33 Ostrava Poruba. Czech Republic Institute of Geonics of the CAs Studentskd 1768 708 000strava Poruba Czech Republic

The study deals with adsorption of Naphthol Green B on two unburned carbons and the parent coal,from which the UCs have been created in a fluidised-bed power *** attention has been paid to the adsorption equilibrium modelling:experimental data has been analysed using 2-parameter(langmuir,Freundlich) and3-parameter(Redlich-Peterson) isotherms — both linear and non-linear regressions have been used for the estimation of the isotherm *** the case of both UCs,the langmuir isotherm model provides the worst fit,whereas 2-parameter Freundlich and 3-parameter Redlich-Peterson models are both good,from which 3-parameter Redlich-Peterson isotherm provides slightly better results(despite the penalty used for the higher number of parameters).In the case of both UCs,the linear regression of Freundlich and Redlich-Peterson models provides good results(comparable with non-linear regressions).Unlike both UCs,the best fit of the experimental data from the adsorption on the coal has been achieved by the langmuir isotherm *** results based on the Freundlich or Redlich-Peterson model were(in this case) somewhat worse.

关键词： Adsorption Unburned carbon Naphthol Green B Isotherms Non-linear modelling Redlich-Peterson model