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It was envisaged that requisite technologies exist which includes composite materials, advanced Wankel IC engines, the electronics revolution in terms of size/cost/capability of sensors/control systems/computing, the GPS system, the emerging global satellite-based personal communications systems, computational fluid mechanics and flow control.
Ultra lightweight structures are proposed for PAVs using aluminum, composite and hybrid materials.
And Material Vol. 225 (2012) 18-25
The Aeronautical Journal of the Royal Aeronautical Society, 125-130, 1993
And Budiyono, A., International J. of Aeronautical & Space Sciences Vol. 10(2) (2009)

Separation and Recovery of Copper(Ⅱ),Nickel(Ⅱ) from Simulated Plating Wastewater by Solvent Extraction Using Lix984* LI Li-qing1,2 and ZHONG-Hong1 1.School of Chemistry and Chemical Engineering, Central South University,Changsha,China 2.Faculty of Material and Chemical Engineering, Jiangxi University of Science and Technology, GanZhou 34100, China E-mail: zhonghongcsu@163.com Keywords：Separation and Recovery；Cu2+；Ni2+；Solvent Extraction；Lix984 Abstract.
“Recovery of high purity precious metals from printed circuit boards,” Journal of Hazardous Materials, vol. 164, 2009,pp.1152-1158
“Separation and recovery of materials from scrap printed circuit boards,” Resour.
“Co-extraction and selective stripping of copper(Ⅱ) and molybdenum(Ⅵ) using LIX 622,” Chemical Engineering Journal.
“Extraction and separation of Co(Ⅱ) and Ni(Ⅱ) from acidic sulfate solutions using Aliquat 336,” Journal of Hazardous Materials, vol. 173, 2010,pp. 223-229

Many compounds are usually sensitive to heat such as high vacuum oils, vegetable oils, pharmaceuticals, and cosmetics, so conventional distillations cannot be used with these materials [13].
This approach is usually considered as one of the most economically feasible methods separating and purifying thermally unstable materials, especially for substances with high molecular mass, high viscosity, and high melting point [15].
Materials and Methods Materials.
Aroma extract dilution analysis of aged Cheddar cheese, Journal of Food Science. 60 (1995) 212-220
Heat and mass transfer in the evaporating film of a molecular evaporator, Chemical Engineering Journal. 85 (2002) 225-234

Hebei Academic Journal, 2011, 31 (1). ( In Chinese) [2] Degui Zhao.
Journal of Mountain Science, 2005, 23 (5): P431-436. ( In Chinese) [5] Xiaozhe Wang.
Shanxi Architecture, 2009, 35 (5). ( In Chinese) [7] Application materials for 2012 United Nations habitat award.
Suzhou University of Science and Technology: 2013. ( In Chinese) [12] Tonggong Zhang.
Graduate School of Chinese Academy of Social Sciences: 2012. ( In Chinese) [13] Xi Ding.

Materials and methods The study area Site description The research region is located in the central parts of the Sichuan Basin.
Parent material The research area presents a variety of parent materials including alluvial sediment, Guanghan Clay, Chengdu Clay, Jiaguan, Chengqiangyan and Penglaizhen.
Effects of parent material and landuse pattern on soil available Mn and Zn There were significant differences for soil available Mn contents from all kinds of parent materials (P=0.004), but not for Zn (P=0.163).
Geostatistical modeling of uncertainty in soil science.
Journal of Hazardous Materials 2009; 164: 1185–1190

Experiment Material and Process Experimental Material.
So the critical speeds in different working conditions and materials are different.
Acknowledgments This work is supported by the National Natural Science Foundation of China (Grant No.51105172 & 51405195), Shandong National Natural Science (ZR2015EL028) and Shandong Scientific Research Foundation for Excellent Young Scientists (No.
Journal of Engineering Design, 2004, 11(1): 31-36
Reviews on Advanced Material Science, 2012, 30 (2): 184-188

The modified materials were characterized by X-ray diffraction (XRD), transmission electron micrographs (TEM), nitrogen adsorption.
The modified materials were sulfated by incipient wetness impregnation method.
Scanning electron microscopy (SEM) images were achieved by S-4300 (Hitachi, Japan) to observe the overall morphology of the resulting materials.
The XRD pattern is similar to those pure siliceous SBA-15 materials.
Nair:Microporous and Mesoporous Materials Vol.33(1999), p.1-48 [6] N.Lohitharn, E.Lotero and J.

Because the 4.6 billion years earth is the source of all life, stratigraphy, rock and its weathered material soil are dominated by geological systems and geological environment, therefore, really known and protected Geological Heritage is protected natural environment, other ecological diversity, ecological structure and ecological environment are also protected.
Jiang, Current status and expectation for the protection of the geological heritage in China, Journal of East China Institute of Technology, Jiangxi Province, 2011.
Forth, physical heritage include the habitat with significance on the protection of biodiversity, including the habitat of those endangered species of outstanding universal value from the prospective of science and protection.
(3)Popular science: Exactly, the primary reason to protect the geological relics is the value in geological research.
(in chinese) ,[]Y.H.Guo,P.S.Niu.On the construction and administration of natural protective areas of geology remains.Journal of Shijiazhang University,Hebei Province,1999.

Introduction Due the introduction of several new materials in clean rooms, the monitoring of trace metallic contamination is a real and present need.
Materials & methods The full experimental procedure was carried out in a class 1 clean room.
The two ways of contamination lead to different states of the contamination in terms of oxidation (ionic vs. metal forms), distribution at microscopic scale (homogeneous vs. aggregate), chemical bounds involved between contaminants and materials (Si and droplet mixture) explaining likely the differences of the collection between metal and ionic form of contamination.
Kim and al., Cleaning Efficiencies of Various Chemical Solutions for Noble Metals such as Cu, Ag and Au on Si wafers Surface, Journal of the Electrochemical Society, 146 (1999) 4281-4289 [2] G.
Tardif, Contribution for the optimization of VPD technique, Materials Science & Engineering B, 102 (2003) 213-217

Experimental Materials.
Wollastonite belongs to inorganic materials and PP is organic materials, so they have bad compatibility.
Materials Science and Engineering A, 2009, 501: 94-98
Construction and Building Materials, 2009,23:1168-1177
Materials and Design, 2007, 28:2063-2070