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Novel Design Solutions for fishing reel Mechanisms

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Chinese Journal of Mechanical Engineering 2015年第4期28卷 726-736页

作者： LOVASZ Erwin-Christian MODLEr Karl-Heinz NEUMANN rudolf GrUESCU Corina Mihaela PErJU Dan CIUPE Valentin MANIU Inocentiu Department of Mechatronics University Politehnica Timisoara institut für festkrpermechanik Technische Universitt Dresden

Currently, there are various reels on the market regarding the type of mechanism, which achieves the winding and unwinding of the line. The designers have the purpose of obtaining a linear transmission function, by means of a simple and small-sized mechanism. However, the present solutions are not satisfactory because of large deviations from linearity of the transmission function and complexity of mechanical schema. A novel solution for the reel spool mechanism is proposed. Its kinematic schema and synthesis method are described. The kinematic schema of the chosen mechanism is based on a noncircular gear in series with a scotch-yoke mechanism. The yoke is driven by a stud fixed on the driving noncircular gear. The drawbacks of other models regarding the effects occurring at the ends of the spool are eliminated through achieving an appropriate transmission function of the spool. The linear function approximation with curved end-arches appropriately computed to ensure mathematical continuity is very good. The experimental results on the mechanism model validate the theoretical approach. The developed mechanism solution is recorded under a reel spool mechanism patent.

关键词： reel mechanism noncircular gears analysis synthesis transmission function

Entropy dominated behaviors of confined polymer-nanoparticle composites

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Chinese Physics B 2012年第11期21卷 513-517页

作者：曹学正 Merlitz Holger Sommer Jens-Uwe 吴晨旭 Department of Physics and ITPA Xiamen University leibniz-institut fr Polymerforschung dresden

Stretched polymers will lose their possible configurations if they are mixed with nanoparticles or touch a hard wall, which leads to a strong depletion attraction responsible for the enrichment of nanoparticles near substrates. Moreover, it is found that there exists a sacrifice mechanism in confined pure polymer samples or polymer-nanoparticle mixtures, that part of the polymers, in order to reach a minimum free energy for the total system, are adsorbed on hard walls even though they lose their conformation. The current study provides a simple yet effective approach for the design of thin polymer composites.

关键词： conformation entropy nanoparticle depletion attraction thin polymer layer

Aggregation of fullerene (C_(60)) nanoparticle:A molecular-dynamic study

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Chinese Physics B 2014年第4期23卷 659-662页

作者：何素贞 Merlitz Holger 吴晨旭 Department of Electronic Engineering Putian University Department of Physics and ITPA Xiamen University leibniz-institut fr Polymerforschung dresden 01069 dresden

We present the results of molecular dynamics simulations of net positively charged fullerene nanoparticles in salt- free and salt-added solution. The aggregation of fullerene （C60）-like nanoparticle and counterion are studied in detail as a function of temperatures and a finite salt concentration. Our simulations show that the strong conformation changes as temperature changes. The net positively-charged nanoparticles do not repel each other but are condensed under proper temperatures. If salts are added, the aggregated nanoparticles will be disaggregated due to the Debye screening effect.

关键词： nanoparticle molecular dynamics simulation aggregation counterion release

Microstructural Evolution and Mechanical Behaviour of Metastable Cu-Zr-Co Alloys

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Journal of Materials Science & Technology 2014年第6期30卷 584-589页

作者： S.Pauly K.Kosiba P.Gargarella B.Escher K.K.Song G.Wang U.Kühn J.Eckert IfW dresden Institut für Komplexe Materialien HelmholtzstraBe 20D-01069 Dresden Germany Laboratory for Microstructures Shanghai University TU dresden Institut für WerkstoffwissenschaftD-01062 Dresden Germany

Three different Cu-Zr-Co alloys, namely Cu40Zr37.5Co22.5, Cu42.5Zr45Co12.5 and Cu49Zr49Co2, were obtained by rapid cooling. The microstructure and phase formation of as-cast rods with diameters of 2 mm are compared with those of the respective ingots. An increasing Co content stabilises the B2 CuZr phase and leads to the precipitation of a ternary Cu-Zr-Co phase. The variation of the cooling rate affects the size of the B2 dendrites as well as the volume fraction and the morphology of the interdendritic phases. The mechanical properties were determined in compression and all alloys show a certain plastic deformability despite the presence of several binary and ternary intermetallic phases. The deformation mechanisms are discussed on the basis of the microstructures and the constituent phases.

关键词： Bulk metallic glasses Microstructural evolution Mechanical behaviour

In vitro response of Human Mesenchymal Stromal Cells to Titanium Coated Peek films and Their Suitability for Magnetic resonance Imaging

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Journal of Materials Science & Technology 2015年第5期31卷 427-436页

作者： Cindy Elschner Carolin Noack Carolin PreilBler Andreas Krause Ulrich Scheler Ute Hempel leibniz-institut fr Polymerforschung dresden e.V. Hohe Str.601069 DresdenGermany CrTD/DfG-Center for regenerative Therapies dresden Fetscherstr.10501307 DresdenGermany institut fr Physiologische Chemie Technische Universitt DresdenFiedlerstr.4201307 DresdenGermany NaMlab gGmbH Nthnitzer Str.6401187 DresdenGermany

Medical imaging is an important tool for the post-operative checkup of an accurate position of an implant as well as for monitoring the integration in the adjacent tissue that may influence the success of a medical ***,the possibility to use imaging methods is associated with the implant material and all the established metallic materials for surgery do not show a proper 'imaging compatibility'.The present study is a combined investigation of the in vitro response to human mesenchymal stromal cells（hMSC） and magnetic resonance imaging（MrI） compatibility of the potential material combination polyetheretherketone/titanium（PEEK/Ti） for medical *** of the advantageous imaging properties and the mechanical and chemical stability,PEEK becomes more and more an alternative to common metallic implant materials like titanium or ***,PEEK is a bioinert material having a limited ability for direct bone *** to its excellent biocompatibility,Ti was chosen as coating material to enhance the cellular *** result is a combination with advantageous properties:the magnetic susceptibility and elastic modulus close to bone,corrosion resistance and mechanical flexibility of PEEK and the excellent biocompatibility of *** appearance of metal-related artifact was discussed in electrical resistivity and magnetic ***,two titanium coatings have been investigated:a complete coating and a structured surface avoiding surface *** determine the in vitro biocompatibility,the cell responses were assessed in terms of the overall morphology of the hMSC and their cell area distribution,proliferation,osteogenic differentiation and mineral *** cellular stress was evaluated by the prostaglandin *** bonded materials both produced no disturbing artifacts in magnetic resonance *** to the pure PEEK material,the titanium coated specimens showed an enhanced biocompatibilit

关键词： Polyetheretherketone Titanium coating Biocompatibi

Static and dynamic properties of grafted ring polymer: Molecular dynamics simulation

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Chinese Physics B 2013年第1期22卷 403-410页

作者：何素贞候格苏婵菲吴晨旭 Department of Physics and ITPA Xiamen University Department of Electronic Engineering Putian University leibniz-institut fürPolymerforschung dresden

The static and dynamic properties of a system of end-grafted flexible ring polymer chains grafted to a flat substrate and exposed to a good solvent are studied by using a molecular dynamics method. The monomers are described by a coarse-grained bead-spring model. Varying the grafting density p and the degree of polymerization or chain length N, we obtain the density profiles of monomers, study the structural properties of the chain （radius of gyration, bond orientational parameters, etc.）, and also present the dynamic characteristics such as chain energy and bond force. Compared with a linear polymer brush, the ring polymer brush exhibits different static and dynamic properties for moderate or short chain length, while it behaves like linear polymer brush in the regime of long chain length.

关键词： ring polymer molecular dynamics scaling

resilience in supply systems -What the food industry can learn from energy sector

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Journal of Safety Science and resilience 2022年第1期3卷 39-47页

作者： fabian Ossevorth Paul Seidel Sebastian Krahmer Joachim Seifert Peter Schegner Peter Lochmann Lukas Oehm Marc Mauermann Technische Universität dresden Professur für ElektroenergieversorgungDresden 01069Germany Technische Universität dresden Professur für Gebäudeenergietechnik und WärmeversorgungDresden 01069Germany Technische Universität dresden Professur für Verarbeitungsmaschinen/VerarbeitungstechnikDresden 01069Germany fraunhofer-institut for Process Engineering and Packaging IVV Division Processing Technology Dresden01069Germany

Drastic events such as pandemics,earthquakes or other disasters not only threaten the immediate living conditions of people but also indirect circumstances such as energy supply,infrastructure and food *** ensure that damage and failures in these areas do not lead to a disaster,special requirements are placed on this critical *** this context resilience,which is defined as the resistance of a system to external effects,is required.A field that is indeed part of the critical infrastructure,but which has not been considered as intensively as the energy sector,is food *** investigation focuses on how fundamental principles of thermodynamics,system theory and reliability theory can be applied to the modelling of food production processes to obtain a measure of *** known state and process variables from thermodynamics and electrical power engineering,analogous variables are derived for the food *** variables serve as an evaluation standard for a quality measure𝑄.In addi-tion to system-theoretical considerations,it is investigated how existing evaluation criteria of power engineering,such as System Average Interruption Duration Index(SAIDI)and Customer Average Interruption Duration Index(CAIDI),can be transferred to food ***:The investigation focuses on how fundamental principles of thermodynamics,system theory and reliability theory can be applied to the modelling of food production processes to obtain a measure of *** known state and process variables from thermodynamics and electrical power engineering,analogous variables are derived for the food ***:Drastic events such as pandemics,earthquakes or other disasters not only threaten the immediate living conditions of people but also indirect circumstances such as energy supply,infrastructure and food *** ensure that damage and failures in these areas do not lead to a disaster,special requirements are placed on t

关键词： resilience food industry Energy Sector System Theory

Characterization and mode of action analysis of black soldier fly(Hermetia illucens)larva-derived hemocytes

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Insect Science 2022年第4期29卷 1071-1095页

作者： Yvette M.von Bredow Ariane Müller Philipp f.Popp Denis Iliasov Christoph-rüdiger von Bredow Justus-Liebig-Universität Gießen Institut für Allgemeine Zoologie und EntwicklungsbiologieZelluläre Erkennungs-und AbwehrprozesseGießenGermany Technische Universität dresden Fakultät BiologieInstitut für ZoologieDresdenGermany Technische Universität dresden Fakultät BiologieInstitut für MikrobiologieDresdenGermany Present address:Philipp f.Popp Institute for Biology-Bacterial PhysiologyHumboldt-Universität zu BerlinBerlinGermany

With the growing importance of the black soldier fly(Hermetia illucens)for both sustainable food production and waste management as well as for science,a great demand of understanding its immune system ***,we present the first description of the circulating larval hemocytes with special emphasis on uptake of microorganisms and distinguishing hemocyte *** histological,zymographic,and cytometric methods and with a set of hemocyte binding lectins and antibodies,the hemocytes of *** are identified as plasmatocytes,crystal cells,and putative *** hemocyte counts(THC)are determined,and methods for THC determination are *** 1100 hemocytes per microliter hemolymph are present in naive animals,while hemocyte density decreases dramatically shortly after wounding,indicating a role of hemocytes in response to wounding(and immune response in general).The determination of the relative abundance of each hemocyte type(differential hemocyte count,DHC)revealed that plasmatocytes are highly abundant,whereas prohemocytes and crystal cells make up only a small percentage of the circulating *** are not only the most abundant but also the professional phagocytes in *** rapidly engulf and take up bacteria both in vivo and in vitro,indicating a very potent cellular defense against invading *** bioparticles such as yeasts are also removed from circulation by phagocytosis,but slower than *** is the first analysis of the potent cellular immune response in the black soldier fly,and a first toolbox that helps to identify hemocyte(types)is presented.

关键词： black soldier fly(Hermetia ilucens) cellular immunity crystal cell hemocyte types immunity of economically imporant insects microbe phagoeytosis plasmatocyte

Superconvergence of a Galerkin fEM for Higher-Order Elements in Convection-Diffusion Problems

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Numerical Mathematics(Theory,Methods and Applications) 2014年第3期7卷 356-373页

作者： Sebastian franz H.-G.roos institut für Numerische Mathematik Technische Universit¨at Dresden01062 DresdenGermany

In this paper we present a first supercloseness analysis for higher-order Galerkin fEM applied to a singularly perturbed convection-diffusion *** a solution decomposition and a special representation of our finite element space,we are able to prove a supercloseness property of p+1/4 in the energy norm where the polynomial order p≥3 is odd.

关键词： Singular perturbation layer-adapted meshes superconvergence postprocessing