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Online since: July 2011
Authors: Jean Pierre Raskin, Thomas Pardoen, Benoit Olbrechts, Bertrand Rue, Denis Flandre
Routes Towards Novel Active Pressure Sensors in SOI Technology Benoit Olbrechts1,3, a, Bertrand Rue1, 3, Thomas Pardoen2, 3, Denis Flandre1, 3 and Jean-Pierre Raskin1, 3 1 Institute of Information and Communication Technologies, Electronics and Applied Mathematics (ICTEAM) 2 Institute of Mechanics, Materials and Civil Engineering (iMMC) 3 Research Center in Micro and Nanoscopic Materials and Electronic Devices (CeRMiN) Université catholique de Louvain, Louvain-la-Neuve, BELGIUM abenoit.olbrechts@uclouvain.be Key words: Thin multilayered dielectric membranes, residual stress, finite elements modeling, piezoresistance, piezoMOS effect, MEMS, smart sensors.
Material physical parameters.
Material constants *measured at UCL, **from [15], ***from [16], in italic, adjusted values according to simulation results.
Materials Stress (MPa) Young’s Mod.
[15] Information on http://www.memsnet.org/material/ [16] Information on http://web.mit.edu/6.777/www/matprops/pecvd_sio2.htm and /apcvd_sio2.htm
Online since: August 2014
Authors: Zhi Long Chen, Hao Cai, Qi Lin Feng, Dong Jun Guo, Yin Ma
For example, Fig. 3 can be used to determine the minimum distance between the salt caverns, to find safe places for people to stay, and to identify proper areas for storing flammable and explosive materials.
Ahn: Journal of hazardous materials, Vol. 97(1) (2003), p. 31
Chamberlain: Chemical engineering research & design, Vol. 65(4) (1987), p. 299
Pietersen: Journal of Hazardous Materials,Vol. 20 (1988), p. 85
Wang: Advanced Materials Research, Vol. 396 (2012), p. 66
Online since: September 2013
Authors: Claudio Chesi, Chiara Tardini, Maria A. Parisi
Seismic vulnerability indicators for timber roof structures, Procs., 9th US National and 10th Canadian Conference on Earthquake Engineering, Vol. 1: 157, Toronto, July 25-29, 2010
Mechanics of plain and retrofitted traditional timber connections, ASCE, Journal of Structural Engineering, 126:12, (2000), pp 1395-1403
Seismic Behavior and Retrofitting of Joints in Traditional Timber Roof Structures, Soil Dynamics and Earthquake Engineering, 22: (2002), pp 1183-1191
Seismic strengthening of traditional carpentry joints, Procs.14th World Conference of Earthquake Engineering, Vol. 1: 05-04-0051,(2008)
Tardini The Role of Timber Roof Structures in the Seismic Response of Traditional Buildings, paper 2394, Proceedings of the 15th World conference on Earthquake Engineering, Lisbon, 2012
Online since: June 2015
Authors: Salman Safavi, S. Mohyeddin Bateni, Tong Ren Xu
Mohyeddin BATENI3,b and Tongren XU1,c* 1State Key Laboratory of Remote Sensing Science, School of Geography, Beijing Normal University, Beijing 100875, China 2Department of Civil Engineering, Islamic Azad University, Malard Branch, Tehran, Iran 3Department of Civil and Environmental Enginering and Water Resources Research Center, University of Hawaii at Manoa, Honolulu, USA asalman_safavi@iaumalard.ac.ir, b smbateni@hawaii.edu, cxutr@bnu.edu.cn (corresponding author) Keywords: Solid waste; Principal component analysis; Artificial neural network.
PCA has been used widely in many environmental engineering problems such as operation of wastewater treatment plants [8], air pollution modeling [9], and surface water quality modeling [10].
In this study, a feed-forward multi-layer perceptron ANN is used due to its common application in engineering problems [13, 14].
Acknowledgements This work was funded by the Water Resource Research Center (WRRC) and College of Engineering at the University of Hawaii at Manoa.
Theisen, Solid Waste Engineering Principles and Management, 1st edition, McGraw Hill, Tokyo, 1977
Online since: April 2020
Authors: Nurul Fitriyah, Ten Her Hong, Ha Thai Duy, Juinn Wei Mi, Yen Fu Hsiao, Jenh Yih Juang
In contrast, the materials with superconducting behavior tend to exhibit perfect diamagnetism, which the total magnetic field almost close to zero.
Conductive materials were used for preparing the electrical contact measurement.
Somehow, those conductive materials have a higher conductivity than films itself.
Empirical Selection Rule of Substrate Materials for Iron Chalcogenide Superconducting Thin Films.
La, In-situ spectroscopic studies and interfacial engineering on FeSe/oxide heterostructures: Insights on the interfacial superconductivity, Chin.
Online since: July 2011
Authors: Xiu Neng Li, Xiao Hua Sun, Sheng Gang Zhou, Shuang Hou, Tian You Peng, Xing Zhong Zhao
The dielectric and tunable properties of graded Fe doped PST thin films fabricated by sol-gel method Xiaohua Sun1,2 a, Xiuneng Li1, Shenggang Zhou1, Shuang Hou1, Tianyou Peng2, Xing-zhong Zhao2 1 School of Mechanical and Material Engineering, China Three Gorges University, Yichang 443002, China. 2 School of Physics, College of Chemistry and Molecular Science, Wuhan University, Wuhan 430072, China.
Moreover, the processing temperature is lower in lead-based materials compared to (Ba1-xSrx)TiO3 (BST).
Furthermore, it has been identified to improve the loss of these materials is acceptor doping.
Experimental The precursor solutions of Fe doped PST were synthesized according to the formula (Pb0.3Sr0.7)(Ti1-xFex)O3 by sol-gel method, where x=0, 1%, 2%, 4% and 6%, using lead acetate tri-hydrate Pb(CH3COO)2·3H2O, strontium acetate semi-hydrate Sr(CH3COO)2·1/2H2O, ferric nitrate Fe(NO3)3·9H2O and titanium butoxide Ti(OC4H9)4 as the starting materials.
The microstructure is one of the key parameters determining the dielectric properties.
Online since: May 2011
Authors: Jun Jie Fan
A Case Study on the Design of Green Building in Expo 2010 Shanghai Junjie Fan School of Civil Engineering and Architecture, Ningbo Institute of Technology, Zhejiang University, Ningbo City, Zhejiang Province, China 315100 fanjaser@gmail.com Key words: Expo 2010 Shanghai, Green Building, Case, Idea, Technology Abstract.
The material is made of desert sand which taken from the northwest of China, with a special technology of adhesive repression.
The project of Eco-house in Shanghai, making use of 150,000 old bricks removed from the old Shikumen, is designed from the aspects of wind, light, green land, and waste, etc. to emphasize the combination of construction materials, technical equipment and the construction shape, getting them perfect in one set of integration design.
Particularly some production process of green materials and technologies itself is high energy consumption, and high pollution, For example, some cases of green building adopted a series of inappropriate ways and means, just for a partial target, but it is damaging the core value of ecological energy.
The first consideration of green building should be the building itself, through a rational design and spatial layout to save water, land, energy, materials and reduce pollution.
Online since: January 2013
Authors: Bei Gang Li, Jing Mi, Chen Wang
Fly ash (FA) is a solid waste material from coal-fired powder stations.
Materials and Methods Materials and preparation of adsorption Fly ash (FA) was collected from electric power plant in the Inner Mongolia Autonomous Region, China.
Their effects on material preparation are shown in Fig.1and Fig.2 in this study.
[3] Mingjin Chu, Huizhong Xu, Zhilin Jia, Yun Fan and Jiangping Xu, Microwave-Assisted Zeolite Hydrothermal Synthesis from Coal Fly Ash and its Application, Applied Mechanics and Materials, Vol.178-181 (2012) 380-384
McKay, Sorption of dye from aqueous solution by peat, Chemical Engineering Journal, 70 (1998) 115-124
Online since: March 2006
Authors: M. El-Hofy
These materials are found wide applications in the field of electronics as a voltage surge protectors in electric circuits.
Although several metal oxides are used as additives to ZnO the most widely used system for varistors manufacturing is based on the ternary ZnO-Bi2O3-Sb2O3 where B2O3 plays the essential role to impart non-linear behavior to the material [1, 2, 3].
Really the exact nature of these roles is hard to assess because it depends on many industrial operations during fabrication of the ceramic; the purity of the raw materials, homogeneity, pressing operation, sintering and thermal regime.
Sirikulrat: Materials Letters Vol. 59 (2005), p. 283 [14] M.
Mazurik: Key Engineering Materials Vol.132- 136(1997), p. 1289
Online since: July 2015
Authors: La Mei Guo, Qiang Li, Wan Zhen Huang, Chao Ling
Slashing and Weaving Properties of Twisted Carbon Fiber Yarns Qiang LI a, La Mei GUO b*, Wan Zhen HUANG c and Chao LING d Key Laboratory of Textile Science & Technology, Ministry of Education College of Textile, Donghua University, Shanghai 201620, China alllq1006@163.com;b lmguo@dhu.edu.cn; czjyhwz_1314@126.com;ddhulc2140002@126.com; Keywords: carbon fiber yarns; slashing properties; desizing; weaving properties; Abstract.
Introduction Carbon fiber reinforced polymer composites have been widely used in aerospace, marine, and automobile industries during the past few decades(since1960) due to their good engineering properties such as high specific strength and stiffness, lower density, high fatigue endurance, high damping, and low thermal coefficient (in the fiber direction)[1].
As a result, various compounds are selected as sizing agent, depending on the matrix resin, which is generally made of epoxy resin, phenol resin polyimide, etc [5,6,7] However, as reinforcements for manufacturing high performance composite materials, it is difficult for carbon fibers to spin into yarns because their high modulus of elasticity and low elongation at break [8].
Experimental Procedure Materials and sample preparation.
TABLE 1 THE BASIC PROPERTIES OF CARBON YARNS Yarn types Yarn materials Twisted way Number of yarn Yarn twist Yarn twist [ twist /m] linear density [tex] Staple yarns PAN-based carbon fiber Ring twisting method 2 strands Z twist*S twist 230*180 97 Table 1 shows the basic properties of carbon fiber yarns, and these PAN-based carbon fibers can be spun into yarns by ring twisting method and the yarns can be woven into a fabric theoretically.
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