Search results

Recent Trends in Nitrogen Cooling Modelling of Extrusion Dies Riccardo Pelaccia1,a*, Marco Negozio2,b, Sara Di Donato2,c, Lorenzo Donati2,d, Barbara Reggiani1,3,e 1DISMI Department of Sciences and Methods for Engineering, University of Modena and Reggio Emilia, Via Amendola 2, 42122, Reggio Emilia, Italy 2DIN Department of Industrial Engineering, University of Bologna, Viale Risorgimento 2, 40136, Bologna, Italy 3INTERMECH, University of Modena and Reggio Emilia, Italy a*riccardo.pelaccia@unimore.it, bmarco.negozio2@unibo.it, csara.didonato2@unibo.it, dl.donati@unibo.it, ebarbara.reggiani@unimore.it Keywords: Liquid Nitrogen, Cooling Channels; Extrusion Dies, Topological Optimization.
The use of a 3D model of the cooling channel (approach ②) can be taken into account when the extrusion process is replaced with thermal boundary conditions where the material flow is in contact with the tooling set (feeder, portholes, bearings…).
Indeed, the cooling path must be designed to further reduce the temperature in the hottest surfaces and, to a lesser extent in the other areas, so that the thermal gradient on the die walls caused by the material flow must be well modelled.
Pizzarelli, Effectiveness of Spalart–Allmaras Turbulence Model in Analysis of Curved Cooling Channels, AIAA Journal 51(9) (2013) 2158-2167.

It is related to the security and smoothness of important equipment, works and bureau departments have putted a lot of manpower, material and financial resources on the maintenance of turnout.
Acknowledgements This work was financially supported by the National natural science Foundation (51008256) and.
National youth natural science Foundation (51078320).
Journal of Southwest Jiaotong University. 2010（1）：28-33 :In Chinese

Acknowledgements This work was financially supported by the Advance Research Fund of Key Laboratory of Science and Technology for National Defence (9140C900401130C90001).
References [1] Yao Yiping, Zhang Yingxing, Parallel Processing-based Analysis and Simulation Solutions, Journal of System Simulation, Vol.20 No.24(2008): p.6617-6622 [2] Yao Yiping: User Materials of Military High-performance Simulation Computer Systems (Press of National Defense University, Changsha 2011) [3] Gang Liu, Yiping Yao, Buquan Liu.

Table 2 Materials’ Properties [33] Elastic Modulus (GPa) (N/m2) Specimen Poisson’s Ratio Density (kg/m3) Concrete 30.5 E09 all 0.2 2500 Steel 210.0 E09 all 0.30 7800 (a) Compressive hardening-CDP Model (b) Tension stiffening-CDP Model (c) Plastic model-reinforcement bar Fig. 9 Properties of materials in CDP and plastic model [43] (a) Compression (b) Tension Fig. 10 Damage parameters for the CDP model [43] 5.4 Material properties The concrete was modeled using concrete damage plasticity (CDP) available in ABAQUS, which can be used for both static and dynamic analyses and in all types of elements.
The input data for the CDP and plastic model in ABAQUS in the form of the stress-strain curve for tensile or compressive behavior of concrete and reinforcement bar in different specimens is displayed in Fig. 9 and the relevant elastic material properties of specimens are shown in Table 2.
National Institute of Building Sciences, Washington (DC)
National Institute of Building Sciences.
ACI Structural Journal; 106(5):600-607

Moreover, the extension space of green wedge is provided between the finger-like elongation axis of the star-shaped radial city and the length of contact interface between the city plate and base material are increased to facilitate the exchange of internal and external environments, as shown in figure 3.
Changsha: Changsha University of Science and Technology, 2005,in Chinese [2] Yongtao Li:Theory and method for traffic system layout of small town[D]．Xi’an: Chang'an University, 2004,in Chinese [3] Zhi Feng:Urban Traffic Geography[M]．Beijing: People’s Press, 1990
Beijing: Beijing University of Technology 2006[7] ,in Chinese [8] Minliu and Guojun Hu:Research on Layout of Expressway Adaptive to Urban Configuration[J]．Jiangsu Urban Planning,2008,3:8-13[8] [9] Yanguang Chen an Kun Huang:Journal of Xinyang Normal University,2002,15(1):62-67 [10] Research on the Relationship between Road Network and Regional Economical Development Based on Fractal Theory [D].
Guangzhou: Jiangxi University of Science and Technology, 2009, in Chinese

Introduction In several fields of material sciences, cellular structures (ranging from solid foams to polycrystals) have been the subject of much interest in recent years.
Acknowledgements The financial support of the Hungarian Academy of Sciences (under contract OTKA T030521) is gratefully acknowledged.
Rassat: Toroidal and Spherical Fullerene-like Molecules with Only Pentagonal and Heptagonal Faces, International Journal of Quantum Chemistry, Vol. 84 (2001) p. 136-139

Comet assay determine DNA damage baseline level of Mollusca hemolymph cells in Poyang Lake and surrounding waters XU Liang，ZHOU Kan，ZHOU Chunhua, OUYANG Shan, WU Xiaoping1 College of Life Sciences and Food Engineering; Nanchang University; Nanchang , 330031.
Materials and methods We collected dominant mollusc species of each site in withered and plentiful water period, and ensured samples of each species with similar size.
Journal of Marine Systems, 72: 320-331

Materials and Research Methods During the study, the authors analyzed cases of patients during the ambulatory treatment in city policlinics and in the traumatological policlinic.
The search for publications in Russian in peer-reviewed journals was carried out on the electronic basis RISC (Russian Science Citation Index) and the scientific electronic library eLIBRARY.RU.

Journal Citation (to be inserted by the publisher) Copyright by Trans Tech Publications Toxicity Screening Tests for Wastewater Treatment Plants - I Jin-Hwa Park1 and Yong Woo YI2 1 Korea Institute of Environmental Science and Technology 613-2, Bulgeang-Dong Eunpyeong-Gu, Seoul, Korea, sunflower@kiest.org 2 Center for Optic Technology, Jeonnam Provincial College, Damyang-Eup, Jeonnam, Korea, ywyi@namdo.ac.kr Keywords: Toxicity Screening Test, Wastewater, ETr and RET, Activated Sludge, Trickling Filter.
Samples include domestic sewage, primary settled sewage with or without industrial wastewater, Straus wastewater, Hospital wastewater, Home Life domestic wastewater, various types of dyes and other materials used at Straus Knitting Mills, and TF biomass.

Miseki, Heterogeneous photocatalyst materials for water splitting.
Sorrell, Photo-electrochemical hydrogen generation from water using solar energy- materials-related aspects.
Jaramillo, Modeling practical performance limits of photoelectrochemical water splitting based on the current state of materials research.
Gong, Controllable fabrication of nanostructured materials for photoelectrochemical water splitting via atomic layer deposition.
Ramakrishna, Review of one-dimensional and two-dimensional nanostructured materials for hydrogen generation.