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Chinese Physics b 2011年第11期20卷 167-175页

作者： Cs.Mészáros a.bálint Szent István University Department of Physics and Process Control Szent István University Department of Chemistry and Biochemistry

The basic partial differential equations relevant for convection-diffusion and convection-diffusion-wave phenomena arc presented and solved analytically by using the MAPLE symbolic computer algebra system. The possible general nonlinear character of the constitutive equation of the convection-discussion process is replaced by a direct posteriori stochastic refinement of its solution represented for Dirichlet-type boundary conditions. A thermodynamic analysis is performed for connecting the relaxation time constants and Jacobi-determinants of deformations at transient transport processes. Finally, a new procedure for general description of coupled transport processes on the basis of the formalism originally developed for convection-free phenomena is presented by matrix analysis methods in the Fourier space.

关键词： convection binary mixtures relaxation time matrix polynomials

Suitability of lost cores in rheocasting process

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中国有色金属学会会刊：英文版 2010年第S3期20卷 948-953页

作者： H.MICHELS M.büNCK a.büHRIG-POLACZEK Giesserei-Institut RWTH Aachen Intzestraeβ5Aachen 52072Germany

When treated in pressure die casting processes the semi-solid aluminum alloys demand resilient cores which can bear the stress occurring during filling and the final pressure *** design of permanent cores is highly restricted in order to maintain *** cores provide the possibility of complex,undercut geometrical shapes which is mandatory for a variety of casting ***,eligible materials which show appropriate resilience and proper decomposition properties at the same time,and in the upper echelon of cost-effectiveness,are seldom *** the semi-solid process suited between HPDC and GDC regarding the core stress,several common and economically efficient lost core systems could be used.A selection of potentially suitable materials was identified and *** range of testing comprises widespread sand core-systems(amin-pur-coldbox and CO2-water-glass) as well as materials less commonly used,namely salt,plastic and *** types of conditioning are applied to enhance the surface *** mechanical properties of the sand cores are enhanced by different heat treatment methods during *** cores are tested producing a research component cast on a HPDC machine with semi-solid A356 slurry fabricated in the cooling channel *** cast component was analyzed regarding shape stability,core removability and surface as well as the structure *** results show the importance of the surface conditioning for the sand-cores while salt and zinc produce good parts comparable to the reference steel core quality.

关键词： aluminum semi-solid rheocasting cooling channel lost core sand salt zinc plastic

Iron regulatory protein 1: the deadly switch of ferroptosis

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Neural Regeneration Research 2024年第3期19卷 477-478页

作者： Daniel a.bórquez Pamela J.Urrutia Center for biomedical Research Faculty of MedicineUniversidad Diego PortalesSantiagoChile Institute of Nutrition&Food Technology(INTA) Universidad de ChileSantiagoChile Geroscience Center for brain Health and Metabolism SantiagoChile

Ferroptosis,an iron-dependent cell death:Ferroptosis is a type of regulated necrosis,characterized by redox-active iron accumulation and increased free radical production derived by Fenton chemistry,that triggers oxidation of polyunsaturated fatty acids in phospholipids,loss of cellular membranes integrity,and leakage of intracellular contents.

关键词： integrity switch Iron

Investigation of Geology and Hydro-geophysical Features Using Electromagnetic and Vertical Sounding Methods for Abu Zabad Area,Western Kordofan State,Sudan

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Journal of Environmental & Earth Sciences 2020年第1期2卷 1-6页

作者： Elhag a.b Musa M.A. Department of Civil Engineering College of EngineeringKing Khalid UniversityAbhaSaudi Arabiaon leave from Kordofan UniversitySudan Department of Geology College of Science and Information TechnologyNyala UniversityNyalaSudan

The geology and hydro-geophysical features can aid in identifying borehole *** study aims to investigate groundwater aquifers and best location of boreholes in the crystalline basement area of Abu Zabad near El Obeid Southwest,*** study area is underlain by two aquifers formations from Preca.brian *** oldest units of basement complex of area under investigation consist of metamorphic rocks including gneiss,schist,and *** geophysical methods electromagnetic(EM)and vertical electrical sounding(VES)surveys showed that best aquifers yield for construction of boreholes are in weathering and fractures *** EM results revealed that structural features are significant for groundwater potential and interpretation of the VES data also revealed four geo-electric layers,but generally two distinct lithologic layers,which include Superficial deposit and bedrock-basement *** curves generated from the data revealed H curve and HK curve,and thickness of these layers varies from 15 m to 50 m in the *** aquifer thickness range from 20 m to 30 *** study concludes that these techniques are suitable for identifying borehole location in the basement rock in Abu Zabad Area Sudan.

关键词： Electromagnetic and geoelectric survey Aquifer units and groundwater potential

Analysis of Wire Vibration in Wire Electric Discharge Machining Process

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仪器仪表学报 2013年第S1期34卷 208-213页

作者： Andhare a.b Jithin E.V. Department of Mechanical Engineering Visvesvaraya National Institute of Technology

Wire electric discharge machining(WEDM)process is used for precision *** accuracy of machining is function of various parameters like current,voltage,wire speed,gap between wire and work piece,wire oscillation,work material,wire material,*** the process parameters are selected,it is important that the wire vibrations are less to obtain a good surface *** to the importance of wire vibration in obtaining the surface finish,it is necessary to study the wire *** paper discusses different models of wire vibration presented in the literature and simulates a closed form solution of wire vibration using *** transverse vibration of wire is analysed as forced vibration of moving wire with excitation due to the sparks during *** resulting partial differential equation is solved by using finite difference method and vibration is also simulated in the finite element package‘ANSYS’.The wire behaviour is investigated under different operating conditions and results of the two methods are

关键词： Wire Vibration Wire Electric Discharge Machining Finite Difference Method Finite Element Method

Iron,the endolysosomal system and neuroinflammation:a matter of balance

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Neural Regeneration Research 2022年第5期17卷 1003-1004页

作者： Daniel a.bórquez Pamela J.Urrutia Marco T.Núñez Center for biomedical Research Faculty of MedicineUniversidad Diego PortalesSantiagoChile Department of biology Faculty of SciencesUniversidad de ChileSantiagoChile

Iron accumulation and neuroinflammation are cardinal features of many neurodegenerative diseases(Urrutia et al.,2021).However,the hierarchy in the pathogenic mechanisms and the molecular connections between these proc... 详细信息

关键词： Iron system showing

Simulation of cooling channel rheocasting process of A356 aluminum alloy using three-phase volume averaging model

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中国有色金属学会会刊:英文版 2005年第2期15卷 389-394页

作者： T.Wang b.Pustal M.Abondano T.Grimmig a.bührig-Polaczek M.Wu A.Ludwig Foundry Institute Aachen University of TechnologyAachenD-52072Germany Department of Metallurgy University of LeobenLeobenA-8700Austria Research Center of Foundry Engineering Dalian University of TechnologyDalian 116024China

The cooling channel process is a rehocasting method by which the prematerial with globular microstructure can be produced to fit the thixocasting process.A three-phase model based on volume averaging approach is proposed to simulate the cooling channel process of A356 Aluminum *** three phases are liquid,solid and air respectively and treated as separated and interacting continua,sharing a single pressure *** mass,momentum,enthalpy transport equations for each phase are *** developed model can predict the evolution of liquid,solid and air fraction as well as the distribution of grain density and grain *** effect of pouring temperature on the grain density,grain size and solid fraction is analyzed in detail.

关键词： A356 alloy modeling cooling channel three-phase semi-solid

Simulation of automobile fuel consumption and emissions for various driver's manual shifting habits

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Journal of Central South University 2014年第3期21卷 1058-1066页

作者： b.Mashadi Y.Amiri-rad A.Afkar M.Mahmoodi-kaleybar School of Automotive Engineering Iran University of Science & Technology Department of Mechanical Engineering Parand Branch Islamic Azad University

The effects of different habits of the drivers on gear shifting strategies for manual powertrain were investigated. For the realization of simulation, the shifting habits of the drivers were conducted in the Advisor software to investigate and compare the emission rates. Simulation was developed based on the optimal gear shifting strategy and criteria and was validated both in fuel economy and emissions by analyzing the results in the various driving cycle and driving styles. To explore an optimal gear shifting strategy with best fuel economy and lowest emission for a manual transmission, a strategy was designed with a highest possible gear criterion as long as the torque requirement can be satisfied. based on two different criteria, namely the engine working conditions and the driver's intention, the governing parameters in decision making for gear shifting of manual transmission in conventional engine were discussed. It is also shown that the optimum gear shifting strategy is based on that both the engine state and the driver's intention eliminates unnecessary shiftings that are present when the intention is overlooked. The optimum shifting habit and the best driving cycle in terms of minimum emissions and fuel consumption were proposed.

关键词： gear shifting strategies driving cycle driver model Advisor

Neuroinflammation revisited through the microglial lens

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Neural Regeneration Research 2025年第7期20卷 1989-1990页

作者： Renato Socodato João b.Relvas Institute of Research and Innovation in Health(i3S)and Institute for Molecular and Cell biology(IbMC) University of PortoPortoPortugal Department of biomedicine Faculty of Medicine of the University of Porto(FMUP)PortoPortugal

Neuroimmunology is emerging as a pivotal field,shedding light on the intricate dialogues between the central nervous system(CNS)and the immune *** exploration is particularly significant in understanding microglia,the CNS’s innate immune cells,beyond the conventional conflation of“neuroinflammation”and“microglial activation.”This conflation has clouded the true complexity of these processes,potentially stalling scientific progress and the development of new *** challenge the long-standing perspectives that have oversimplified these interactions,advocating for a deeper exploration of the dynamic relationship between neuroinflammation and microglial *** dissecting specific molecular pathways,we aim to illuminate their elaborate roles in neuroinflammatory responses,especially in the context of Alzheimer’s disease(AD).Here,neuroinflammation is not merely a passive observer or a direct antagonist but a complex agent in the disease’s *** article calls for a significant paradigm shift towards an integrative,multi-omics approach to *** such a comprehensive framework is crucial for advancing our understanding of neuroinflammatory conditions and paving the way for targeted therapeutic strategies for brain diseases.

关键词： inflammation simplified activation