Search results

Experimental Investigation on the Accumulator Liquid Distribution of Mechanically Pumped Cooling System LIU Jie, HE Yunfeng , ZHOU Enze, and ZHAO Wenjun Institute of Environmental and Municipal Engineering, QingDao Technological University ，China lujor@163.com Keywords: Thermal control ; accumulator; mechanically pumped; experiment; two-phase Abstract.
In this approach, a mechanical pump rather than capillary structure circulates the two-phase liquid to remove heat from the hot engineering or scientific equipment, and then to reject it at an external radiator.
The schematic diagram is described in Fig. 1,In this approach, a mechanical pump, rather than capillary pump, circulates the two-phase liquid to remove heat from the hot engineering or scientific equipment, and then release it from the condensers.
Moreover, the accumulator control plays a key role to the set point controlling.
Birur: NASA thermal control technologies for robotic spacecraft, Applied Thermal Engineering 23 (2003) 1055–1065

Tool tip FRF (frequency response function) is the key input information for cutting dynamics and chatter stability analyses.
Although indirect FRF measurement methods are applied in various engineering applications [8], they have not been applied in machine tool dynamics analyses.
Journal of Materials Processing Technology 209, 5766–5776
Inman, 2001 Engineering Vibration, Prentice-Hall
Altintas, 2004, Multi Frequency Solution of Chatter Stability for Low Immersion Milling, Journal of Manufacturing Science and Engineering, 126:459-466.

Key words: Submerged membrane bioreactor; Aeration conditions; Flow field; Numerical simulation Abstract.
With aeration intensity increases, the membrane surface local gas holdup gradually increased, and expand the scope and more evenly distributed, which means that the membrane surface bubbles evenly distributed, is conducive to the membrane surface contaminants off, and the membrane surface mixed materials.
Simulation on flow pattern of gas-liquid two phase flow in Airlift Reactor[J].Chinese Journal of Environmental Engineering 2012,12(3)1-4
Journal of Engineering Thermophysics, 34(2013)501-504
[16]Lin Zonghu, Li Yongguang, Gas-liquid two phase flow vortex loss characteristics and the engineering application, third ed.

Elaboration of Sol-Gel Derived Hydroxyapatite / Yttria Stabilized Zirconia Composite Coatings Obtained for Biomedical Application Sahar Salehi a, Mohammadhossein Fathi b Biomaterials Group, Department of Materials Engineering, Isfahan University of Technology, Isfahan, 84156-83111, Iran a salehi@ma.iut.ac.ir, bfathi@cc.iut.ac.ir Key words: Hydroxyapatite, Zirconia, Sol-Gel, Nanocomposite, Yttria, Nanostructured coatings.
Introduction Hydroxyapatite has been used as a bone replacement material in restorative dental and orthopedic implants.
Zirconia (ZrO2), having the attributes of high strength and stress-induced phase transformation toughening, has been used to strengthen the brittle materials such as HA [3].
Materials and methods Sample preparation.

Selection of Construction Parameters in Heading Pre-reinforcement Working Method for Liuyang River Tunnel on Wuhan-Guangzhou High-Speed Railway Zhimin Xiang1,2，Renai Yuan3 and Taiyue Qi4 1 School of Civil Engineering, Central South University, Changsha, Hunan, 410083; 2 China Railway & Airport Construction Group Corporation, Beijing, 100093; 3 China Railway First Group Co., Ltd., Xi'an, Shaanxi, 710054; 4 Southwest Jiaotong University, Chengdu, Sichuan, 610031; Keywords: weak wall rock tunnel; fiberglass rockbolt; sensitivity analysis; heading pre-reinforcement method; Abstract: The Liuyang River Tunnel on Wuhan-Guangzhou High-Speed Railway goes through the bottom of Liuyang River, the geological condition of which wall rock is not suitable for the construction.
The test adopts the small strain test rig in State Key Laboratory of Coal Resources and Safe Mining in China University of Mining and Technology
Similar material (1) Similar material of wall rock Table 5 Physical and mechanical parameters of wall rock in river bottom section Wall rock C (MPa) φ （º） E (MPa) Poisson’s ratio μ Compressive strength（MPa） Volume/weight ratio (KN/m3) Ⅴ 0.04～0.15 20～27 27.5～50 0.35～0.45 9.77 17～20 It is available to fix the following physical and mechanical parameters of the model’s wall rock based on the similarity theory: Table 6 Physical and mechanical parameters of the model’s wall rock Wall rock C (MPa) φ （º） E (MPa) Poisson’s ratio μ Compressive strength（MPa） Volume/weight ratio (KN/m3) Ⅴ 0.0013～0.005 20～27 27.5～50 0.35～0.45 0.2 17～20 Similar material includes sand, lime and gypsum, which weight proportions are as follows: Sand: lime: gypsum = 6:1:1 (2) Similar material of sprayed concrete and the second lining Table 7 Model material proportion parameters Water/concrete ratio Modulus of elasticity Sprayed concrete 1：1.15 0.672 Molded concrete 1：1.4 0.93 The first lining
In order to simulate the advanced pre-reinforcement of core rock, it is necessary to increase stratum parameters appropriately within a certain scope around the excavation contour while laying the model, and the proportion of similar material of wall rock within the scope is as follows: sand: lime: gypsum = 3: 0.3 :0.7
Vertical distance: 12m per ring, lap joint of 6m; reinforcement density is 4m2 per piece; outer inserting angle is 1 ° ~ 3 °, the water-cement ratio of grouting material of cement slurry is 1:1 (weight ratio),and the grouting pressure is 0.5 ~ 1.0MPa .

Banding can lead to undesirable variations in mechanical properties as evidenced by an increase in crack propagation parallel to the rolling direction in plate products [3] and the fact that heat treating of material with banded microstructures can result in internal stresses and distortion due to differences in volume change between adjacent microstructural bands [4].
Long time heat treatments are not economical [3] and often materials with microstructures which mask composition gradients by creating microstructures that appear uniform exhibit properties unacceptable for the intended application.
Krauss, Steels Processing, Structure, and Performance, ASM Int., Materials Park, OH, (2008) 169-176
Sietsma, “Application of a Three-Dimensional Microstructure Evolution Model to Identify Key Process Settings for the Production of Dual-Phase Steels,” Metall. and Mat.
Brechet, “Recrystallization and Texture in a Ferritic Stainless Steel: an EBSD Study,” Advanced Engineering Materials, 5 (2003) 570–574.

Effect of Heat Setting Methods on Structures and Properties of High Strength Polyvinyl Alcohol Fibre Yin Zhua, Jiongxin Zhaob* State Key Laboratory for Modification of Chemical Fibres and Polymer Materials, College of Material Science and Engineering, Donghua University, Shanghai 201620, China ashamofeizhu@163.com, bzjxin@dhu.edu.cn Keywords: Polyvinyl alcohol, Fibre, Heat setting, Constant tension, Tensile strength.
Introduction Polyvinyl alcohol (PVA) fibre is one of the most important synthetic fibres with excellent properties and wide range of applications [1,2], it is also an environmental friendly plastic material due to its biodegradability [3,4].
Experimental Materials. (1) Polyvinyl alcohol (PVA-124), degree of polymerization and degree of hydrolysis of PVA-124 are 2400 and 98.5%, produced by Kuraray Co., Ltd. (2) Dmethyl sulfoxide (DMSO), water content≤0.2%; Ethyl alcohol, water content≤0.1%; Methyl alcohol, water content≤0.1%, produced by Sinopharm Chemical Reagent Co., Ltd.
Lavin, Properties of poly(vinyl alcohol) fiber reinforced high-performance organic aggregate cementitious material: Converting brittle to plastic, Constr.

Monitoring the Effective Ambient and Sky Temperature Based on Infrared Sensor for Advanced Thermal Calculations Richard Slávik1,a, Miroslav Čekon1,b, 1Brno University of Technology, Faculty of Civil Engineering, AdMaS centre Veveří 331/95, 602 00, Brno, Czech Republic aslavik.r@fce.vutbr.cz, bcekon.m@fce.vutbr.cz, Keywords: IR sensor, Infrared Thermometer, Pyrgeometer, Longwave radiation Abstract.
[W/m2] (2) [-] (3) However, the conformity of equivalent sky temperatures calculated by different correlations has limited applicability and the variable factors for the estimation of key boundary conditions play a determining role.
LO1408 "AdMaS UP – Advanced Materials, Structures and Technologies", supported by Ministry of Education, Youth and Sports under the "National Sustainability Program I".
Climate data processing for needs of energy analysis Advanced Materials Research, 2014, Vol. 1041, pp. 129-134 [8] Berger X, Cubizolles B, Donet I.
Juráš, "Obtainable Method of Measuring the Solar Radiant Flux Based on Silicone Photodiode Element", Applied Mechanics and Materials, Vol. 824, pp. 477-484, 2016

Study of Frost Resistance on Air-Entrained Concrete in Sulfated Medium Ge Yong 1, a , Yuan Jie 1, b , Wen-Cui Yang 1, c and Bao-Sheng Zhang 1 1 School of Material Science and Engineering, Harbin Institute of Technology, Harbin, China a geyong@hit.edu.cn, byuanjie@hit.edu.cn, ckeriy@126.com Keywords: Air-entrained concrete; Sodium sulfate; Freeze-thaw cycles; Scaling; dynamic elastic modulus Abstract.
Experimental Procedure Material and Mix Proportions A Grade 32.5 ordinary Portland cement according Chinese standard GB175-1999 and Grade І fly ash are used.
Acknowledgments This work is part of a western key project financially supported by Ministry of Communication of the People's Republic of China (No. 200331882008).
Fig. 7 Deterioration of concrete in sodium sulfate solution References [1] Lulu Basheer, Joerg Kropp, David J, Cleland: Assessment of the durability of concrete from its permeation properties: a review, Construction and Building Materials, 15 (2001), pp. 93-103
[2] Michel Pigeon, Jacques Marchand, Richard Pleau: Frost resistant concrete, Construction and Building Materials, Vol.10, No.5, 1996, pp. 339-348

Introduction Transparent conducting oxides (TCOs) are semiconductor materials possessing high electrical conductivity combined with high optical transparency in the visible light.
TCOs are the most important functional materials used in many applications as examples of transparent electrodes for optoelectronic devices [1] and transparent electronics for thin-film field-effect transistors [2].
It is currently used as the industrial standard material for optoelectronic devices.
Khlayboonme and W.Thowladda, Comparative study of non-annealing and annealing on properties of ITO deposited by RF magnetron sputtering, Key Engineering Materials. 659 (2015) 615-619