Search results

However, trial machining of new materials, often is not able to refer on existing data and skills.
In this paper, based on neural networks corresponding model of relationship between the laser machining parameters and surface quality was investigated and applied to predict the better combination of laser cutting design parameters for achieving optimum roughness. 1 Simulated Annealing and Neural Network The quality of laser cutting metal sheet has been affected by many factors including the laser properties, focusing lens properties, mechanical control systems, process materials and process parameters [4-6].
[3] ZHANG Yi,LONG Hui,LI LI-jun.Test Study on Improving precision of Laser Cutting.Journal of Hunan University(Natural Science Edition),Vol.28,No.3(2001),p.37~40
[4] Li Xiang-you,Zeng Xiao-yan.Kery Roughness and quality control of laser Precision cutting.CHINESE JOURNAL OF LASER.Vol.29,No.2(2002),p.174~179

buffer spacer layer substrate n+ heavily doped donor layer GATE SOURCE DRAIN 2DEG E normal Fig. 1 Block diagram of HEMT structure Heterostructure-based devices consist of very thin layers of different semiconductor materials.
A heavily doped donor layer is made of a semiconductor material with large bandgap, while unintentionally doped buffer layer is made of a semiconductor material with smaller bandgap.
Lukić, Bulletin Vinča Institute of Nuclear Sciences, (In Serbian), Vol. 8 (2003), p. 70
Singh, Journal of Applied Physics, Vol. 85 (1999), p. 587
Garcia, Journal of Crystal Growth, Vol. 201/202 (1999), pp. 296

Colorimetric Study on Silk Dyeing with the Extracted Dye from Longan Leaves Using Pre-Mordanting Technique: A research on Effect of Mordant Concentration Rattanaphol Mongkholrattanasit1,a, Kongkiat Maha-in1,b, Charoon Klaichoi1,c, Wiphawan Pimklang1, Panida Buathong1, Wancheng Sittikijyothin2,d, Nattadon Rungruangkitkrai *3,e 1Department of Textile Chemistry Technology, Faculty of Industrial Textiles and Fashion Design, Rajamangala University of Technology Phra Nakhon, Bangkok 10300, Thailand 2Department of Chemical Engineering, Faculty of Engineering, Burapha University, Chonburi, 20131,Thailand 3Eco-Textile Research Unit, Department of Textile Science, Faculty of Agro-Industry, Kasetsart University, Bangkok.10900, Thailand arattanaphol.m@rmutp.ac.th, bkongkiat.m@rmutp.ac.th, cjaroon.k@rmutp.ac.th, dwancheng@buu.ac.th, e*nattadon.r@ku.ac.th Keywords: Natural dye, Dyeing, Silk, Longan leaves, Mordant Abstract: Natural dye extracted from longan leaves was applied
An aspect of the return to use natural dyes is the search for novel natural dyes from various plant materials.
Experimental Materials A commercially produced plain-weave silk fabric was scoured with an aqueous nonionic surfactant solution at a temperature of 50°C for 30 minutes, thoroughly rinsed and air dried at room temperature.
Osman: Research Journal of Textile and Apparel, Vol. 13 (1) (2009), p. 34-45
Lee: Journal of the Korean Society of Clothing and Textiles, Vol. 30 (12) (2006), p. 1708-1713.

In the last years, ultrasound was studied for the extraction of metals from a large variety of materials, and several advantages have been recognized deriving from its application: ultrasound-assisted leaching permits a major release of metals in a shorter time, lower acids consumption and lower temperature of processing.
Swamy, K.L.Narayana, Ultrasonically assisted leaching - Advances in Sonochemistry, ed. by Elsevier Science B.V., (2001) 141-179
, Journal of cleaner production 14 (2006) 1158-1167
Hirajima, Ammoniacal thiosulphate leaching of gold ore, The European Journal of Mineral Processing and Environmental Protection 3 (2003) 344-352
[16] Harunobu Arima, Toyohisa Fujita, and Wan-Tai Yen, Gold Cementation from Ammonium Thiosulfate Solution by Zinc, Copper and Aluminium Powders, Materials Transactions 43 (2002) 485-493.

Development of Microemulsion of phytosteryl glycoside in DMSO and Tween20 for increase antiamoebic activity Chanyapat Sangsuwon1,a and Weena Jirujchariyakul2,b 1Department of Science and Technology, Suansunandha Rajabhat University, Bangkok Thailand. 2Department of Pharmacognocy, Faculty of Pharmacy, Mahidol University, Bangkok,Thailand.
Experimental Materials and Methods Phytochemistry The dried crude methanol of P. pellucida 15g mixed by si gel (63-200 µm, Merck 7734), that was prepared as dried granules and chromatographed on the si gel column (i.d.6 cm, length 50 cm).
Journal of Ethnopharmacology, 91, 215–218, (2004)
Applied and Mechanics and Materials, 709, 417-421, (2015)
Journal of Nanostructure in Chemistry, 3:59, (2013).

Analysis on the Mechanical Properties of Connections on Cold-Formed Square Steel Column and Beam Yong Yaoa , Yun-peng Chub School of Civil Engineering and Architecture, Southwest University of Science and Technology, Mian yang, Sichuan 621010; China ayy001221@163.com , bchuyunpeng@swust.edu.cn Keyword: Cold-Formed Square Steel Tubular; Welded Beam-Column Joint; Bearing Capacity; Ductility; Stiffness Abstract.
Material parameters and element of finite element analysis The steel type is Q235B, yield strength is 235MPa,Tensile strength is 380Mpa, assuming the materials are ideal elastic plasticity two line model, yield criterion and the hardening comply with the Von-Mises yield criterion and Bilinear-Kinemat (BKIN), Considering large deformation and large strain.
From the Fig 3 we can see: (1) under the static loading, all the joints experienced the elastic stage and elastic-plastic stage; because of material strengthened, the carrying capacity of component is improved, but the capacity increased obviously lagging deformation growth, and the QJ joint into plastic early, joint of GQJ has longer yield platform and better ductility than QJ.(2) As the increasing of axial compression ratio, the bearing capacity and stiffness of both two kinds of joints have been decreasing; under the same axial compression ratio, yield load and ultimate load of GQJ is 50% larger than QJ.(3) Under the same axial compression ratio, the initial stiffness of GQJ is larger than QJ, and the axial compression ratio has greater effect on the rate of stiffness degradation on QJ than GQJ.
Acknowledgements Supported by National High Technology Research and Development Program of China(863 Program), No. (2009AA032304) References [1] ZHOU Xuhong, SHI Yu and ZHOU Tianhua.Cold-formed Steel Framing System of Low-rise Residential Building Journal of Architecture and Civil Engineering, Vol. 22, (2005) No. 2, pp. 1-14
Journal of Architecture and Civil Engineering, Vol. 25, (2008) No. 4, pp. 6-12

References [1] V S Warke, G Tryggvason, M M Makhlouf: Journal of Materials Processing Technology.
Vol. 89 (2011), p. 280 [4] Liu H, Xie M Z, Li K, et al: Chinese Journal of Computational Mechanics.
Vol.27 (2007), p. 100 [6] Sun H, Mo X F, Zheng R X: Materials Science and Technology.

Eq.3 show that Hamaker constant only depends on the refractive index of the material.
If the material of disk and head has a low refractive index or a similar refractive index, it can reduce the van der Waals force between head and disk.
Acknowledgement This study is part of project 51275124 supported by National Natural Science Foundation of China.
Journal of Tribology, 2008,130(1): 8-10
Journal of Tribology, 1995, 117(1): 36-46

Introduction In this paper according to the material properties of structural steel and concrete under high temperature, the bonding strength changing laws with different temperature and its formula of the profiled steel sheet-concrete are deduced, and obtained the bonding stress-slip relationship, so as to established a nonlinear finite element method of analyzing the steel concrete composite slab fire properties.
Temperature distribution is unrelated to stress levels , whereby the temperature analysis will not consider the influence which component deformation, cracking, stress and strain level and other factors impact on the thermal parameters of materials and components thermal conduction. 4.
Material stress-strain line is a nonlinear elastic relationship.
Acknowledgements The Project was supported by Shandong Provincial Natural Science Foundation of China(Grant No.
J07YA09-1) References [1] Youlin Xu：Deformed bars—Experimental study of concrete on bond properties，PhD thesis , Tsinghua University，Beijing(1990) [2] Ye Sun：The Shear Behavior of a Composite Floor Slab with Modified Steel Sheeting Profile．Helsinki University of the Technology，Espoo.1998 [3] Hong Li,Weishan Jiang：Experimental study on steel and concrete bond constitutive relation, Journal of Northwestern Institute of Architectural Engineering，No．3，1995 [4] Inspection report：Bearing steel plate。

Effect of CuO Nanoparticles on the Cell Membrane Permeability of A549 and Its Exclusion Xiaoyan Xie a, Lili Xu b, Dongmei Gao c * Key Laboratory of Marine Environment & Ecology, Ministry of Education College of Environmental Science and Engineering, Ocean University of China Qingdao, China axxyxiexiaoyan@163.com, bxulili251143@126.com, cgaodongmei2002@yahoo.com.cn Keywords: CuO nanoparticles; A549; Cell membrane permeability; Exclusion Abstract.
Materials and Methods CuO NPs were purchased from Beijing Nachen S&T Ltd., China.
Materials Letters 58, 3324-3327
Journal of Nanoscience and Nanotechnology 10, 8638–8645