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Online since: December 2013
Authors: Ahmad Sahrim, Sinar Arzuria Adnan, Hazizan Md Akil, Siti Nursyafiqah Samsudin, Firuz Zainuddin, M.A. Nur Azni
They are also used in non-structural applications for cushioning, packaging and insulating purposes because of their energy absorbing properties and good vibration attenuation and thermal and acoustic insulations [1].
Figure 1: Compressive strength of pure PU and Al/PU-CNTs foam sandwich.
The compressive strength shows fluctuated values (Figure 1).
References [1] Liu, Q., Subhash, G., (2004).
Enhancement in thermal and mechanical properties of polyurethane foam infused with nanoparticles. (2008) Materials Science and Engineering A, 479, 213-222
Online since: June 2004
Authors: Fabrizio Roccaforte, Lucia Calcagno, Paolo Musumeci, Francesco La Via, Sebania Libertino, Marco Mauceri, Ricardo Reitano, Alfonso Ruggiero
A set of peaks (473-479 nm) related to carbon vacancies anneals at 600 °C, a second set (470 nm) is stable up to 900 °C and a third set (L1-473 nm and L2 - 480 nm) anneals starting from 400 °C.
High-energy irradiation can be used for lifetime control in bipolar devices and ion implantation for doping [1, 2].
Results and discussion In Fig.1 is plotted the trap concentration determined by DLTS spectrum of the as irradiated sample (solid line), which shows three peaks at temperatures of 230K, 275K, 365 K and a shoulder at 430 K.
We have investigated the thermal annealing of irradiated samples in the temperature range 200- 900 °C and the DLTS spectra plotted in Fig.1 show a change in the intensity of the different levels.
References [1] D.
Online since: October 2012
Authors: Lei Yang
In 1904, German scientist Hulsmeyer was the first to try to use the electromagnetic signal to detect the underground metals[1].
Seen from the overseas engineering practice, radar detecting technology mainly applies to the following fields and exert significant functions:(1) road and bridge detecting: roadbed damage and defect detecting, airport runway detecting, the thickness of highway and tunnel lining detecting, bridge structure detecting, etc. (2) geological exploration: bedrock weathered layer, joint zone and fracture zone distribution. (3) railway detecting: roadbed stratified analysis, roadbed damage and defect detecting, retaining wall detecting, tunnel prediction in advance, tunnel lining thickness detecting, etc. (4) civil works and non-excavation detecting: foundation detecting, underground soil classification and stratified detecting, etc. (5) concrete detecting: concrete thickness detecting, impervious wall detecting, bridge tunnel detecting, pile foundation detecting, hidden object locating in the building, etc. (6) environment detecting: petroleum leakage in gas station, site selection of waste yard
References [1] Yingli LIU.
Non-destructive Testing, 2006, 28(9): 479-484
IEEE Geoscience And Remote Sensing Letters, 2007, 4(1): 88-92
Online since: October 2014
Authors: Xue Guan, Li Na Sun
In addition, traffic pollution, such as automobile exhaust gas subsidence will also be vulnerable to lead pollution [1].
References [1] Brown SL, Chaney RL, Angle JS et al.
ChemEduc, 1995, 72 (6): 479
Online since: December 2014
Authors: Xi Luo, Xi Min Sun
Journal of Finance, 2004, 59(2):479-505. ]but systemic and clear theoretical system is not given. 2.
The research process is shown in Figure 1: Fig.1: Research Process of Grounded Theory 3.
Tab 1 is as follow: Tab.1 Categories in Open Coding No.
to competitors, specifically including: iron ores (9-9-7-1),mines resources (9-12-7-4 ),etc. 6 Risk Diversification It means avoiding the risk based on investment and development in multi-channel and multi-aspect, mainly including: taking into account the multi-aspect (3-9-2-5), financing capacity (10-4-2-1),etc. 7 Economy of Scope It means decreasing the unit cost through expanding business scope, increasing product category and producing two or more kinds of production, mainly including: integration of coal and electricity (6-1-1-1),cement for building (9-7-5-2),etc. 8 Economy of Scale It means that expanding the production scale makes economic effect increasing, specifically including: external market development (5-10-6-1), financial scale (8-9-8-1 ),etc. 9 Market Force It means enterprise has dominated competitive force in market relative to competitors or counterparty, mainly including: principal market (1-8-4-7), bargaining capacity (5-7-5-1) ,etc. 10 Resources Sharing It means
and development, specifically including: setting up Longman Iron & Steel group (9-10-7-2), technology institute (11-1-1-1 ), etc. 19 Function Association It means function association in research and development, purchasing, production, logistics, marketing, management, financing and service, specifically including: logistics channel (9-11-7-3), research platform (11-7-5-1 ), etc. 20 Political Association It means the influence that comes from the claim of national policy and government policy, specifically including: setting up Shaanxi Railway Investment Group (10-1-1-1), Ministry of Railway (10-6-3-2) , etc. 3.2 Axial coding Axial coding is to establish relationships among different categories which are divided in the open coding, through the type analysis. 3.3 Selective coding Selective coding is a process about comparing the core of selective category with the other categories to checking their relationships and completing the category which conceptual development has not
Online since: December 2011
Authors: Xiang Jun Wang, Ming Hui Zhang, Xi Ming Wang
T2 could indicate the interaction between water molecules and biomass [1-2], 1-10ms for the bound water, free water for more than 10ms, and 2.2s for the distilled water [3].
Results and discussion Fig1 FTIR spectra of untreated (a) and esterified (b) wood From figure 1, the original 2924 cm-1, 1423 cm-1, 1372 cm-1, 898 cm-1 absorption peaks were all the characteristic peaks of the cellulose[14]. 3342cm-1 was lignin’s OH stretching vibration, and 1734 cm-1, 1591 cm -1,1506 cm-1 were the C = O absorption peaks of hemicellulose and lignin [15].
References [1]H.
Holzforschung, 1994, 48(6):474–479 [6]Giana Almeida, Stephane Gagne, Roger E.
Carbohydrate Polymers, 2008, 71: 1-8
Online since: June 2014
Authors: Yasuhiro Aruga, Katsushi Matsumoto, Yuki Koshino, Hisao Shishido, Shoichi Hirosawa
The chemical compositions of the three alloys are shown in Table 1.
Table 1 Chemical compositions of the investigated alloys.
As previously reported by the present author[1], three exothermic peaks responsible for the formation of cluster(2), β” and β’ were observed about 343, 533 and 573K, on the other hand another exothermic peak at ~323K responsible for the formation of cluster(1) disappears because cluster(1) was already formed during natural aging for 1.8ks.
Conclusions 1.
References [1] S.Hirosawa, T.Sato: Materials Science Forum, 475-479(2005), 357-360
Online since: January 2014
Authors: Crislene Rodrigues da Silva Morais, Alexsandra Cristina Chaves, Adrianne T. Barros, Luciano L. Trajano, M.A.F. Souza, Francisco Ferreira Dantas Filho
Figure 1: TG curves of the blends and bio-oil and diesel oil in the ratio of 10 º C min-1 in a synthetic air atmosphere.
Table 1.
Bio-oil/diesel blends TG [ºC] TG [ºC] DTG peak Temperature [ºC] Weight loss [%] Diesel puro 339-534 456,01 100 B2 341-542 463,8 100 B5 343-554 479,61 100 B10 347-562 498,35 100 B20 353-565 522,06 100 B50 360-562 537,57 100 B100 440-573 551,63 100 Data of Table 1 shows a temperature stability of 30 °C, weight loss of 8.14% attributed to water loss in the sample and decomposition of organic matter present in fuels.
Blendas blends DE/kJ mol-1 A/s-1 DH¹/kJ mol-1 -DS¹/J mol-1 K-1 DG¹/kJ mol-1 B0 46.29 1,016 52.35 252.2 236.24 B2 48.47 1,015 54.60 252.3 240.53 B5 51.00 1,008 57.25 252.6 247.40 B10 57.54 1,020 63.95 252.7 258.91 B20 59.12 0,94 65.73 253.6 267.40 B50 91.78 0,88 98.52 254.3 304.69 B100 154.37 0,87 161.23 254.5 371.14 DE = activation energy, A = frequency factor; DH = enthalpy change, D S = entropy change, DG = free-energy change.
References [1] G.W.
Online since: September 2013
Authors: Ying Gang Jiang, Jian Hua Sui, Chu Chu Zhao
At present, the sum of the recovery angle in the warp and across warp is commonly seen as the index of the WFEWR. 1.2 The Problem and Improvement Program 1.2.1 Manual Cutting’s Objective Error.
The experimental fabrics’ specification is shown as the Table 1.
The 1#, 2# samples are made from the same machine with the same organization on both sides, among which the 1# is plain woven and 2# is 4/4 twill woven.
Table 1 Specification of the Fabric Samples Sample warp weft Warp density /cm-1 Weft density/cm-1 Fabric weaves 1# 97.2dtex Cotton 97.2dtex Cotton 57 42 Plain 2# 97.2dtex Cotton 97.2dtex Cotton 57 42 4/4 twill 3# 83.3dtex PFY 83.3dtex PFY 96 52 5-end satin 4# 83.3dtex PFY 83.3dtex PFY 96 52 8-end satin 3 Results and Discussion 3.1 Compare of the Test Results of Different Sample Numbers.
Table 4 Values of α and β of the Samples on Both Sides Sample 1# 2# 3# 4# α/º 109 156 323 283 β/º 112 165 473 479 β:α 1.03 1.06 1.46 1.70 4 Conclusions The test of WFEWR calls for the exact samples’ cutting, so it’s better to cut mechanically and uniformly.
Online since: April 2007
Authors: Jing Feng Li, Yan Dong, Bo Ping Zhang, Ya Ru Zhang
Microstructure and Dielectric Properties of LiTiNiO Thin Films Yan Dong1, Bo-Ping Zhang1* , Ya-ru Zhang 1 and Jing-Feng Li2 1 School of Materials Science and Engineering, University of Science and Technology Beijing, 100083, P.R.
Fig. 1 XRD patterns of LiTiNiO thin film annealed at different temperatures for 1 h (a) and at 600°C for different times (b).
References [1] J.B.
Vol. 89 (2002), pp. 217601-1
Forum Vols. 475-479 (2005), pp.1595
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