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Introduction Positrons are a unique tool for studying defects in materials.
When positrons are injected into solid materials they rapidly lose energy in ionizing collisions.
For most materials this is of around several hundred ps.
Vallery, Positron Annihilation as a Method to Characterize Porous Materials, Annual Rev.
Materials Res. 36 (2006) 49-79

This problem can be addressed through the techniques of homogenization of materials with periodic microstructure that have been developed in the last two decades.
In the homogenization procedure the unit cell is associated with a material point of the equivalent homogenized medium.
[4] Suquet P., Analyse limite et homogeneisation, Comptes Rendus de l’Academie des Sciences—Series IIB—Mechanics, 296, 1983, 1355–1358
[6] de Buhan P., de Felice G., A homogenisation approach to the ultimate strength of brick masonry, Journal of the Mechanics and Physics of Solids, 45, 1997, 1085–1104
[8] Lourenço P.B., Rots J., A multi-surface interface model for the analysis of masonry structures, Journal of Engineering Mechanics ASCE, 123, 1997, 660–668

Materials and preparation of samples For the production of test bodies, the composition of quartz sand and FBCFA was used as a source of siliceous materials, while 20 percent of weight of sand was replaced by FBCFA.
Basic chemical composition of the raw materials is displayed in Table 1.
Acknowledgement This was financially supported by the Czech Science Foundation within project No.
FAST-S-17-3874: “Unique analytical methods for assessing the relationship between properties and structure of building materials based on alternative raw materials“.
Cement-brick waste blends, In Journal of Thermal Analysis and Calorimetry (2004) 75: 197

In this event, proper coupling agent is extremely important to improve the clinical performance of resin-based composite restorative materials.
Nevertheless, many other classes of materials, including titanates and zirconium compounds, have been used for promoting adhesion.
Accordingly, promising results can be obtained with the application of titanates in dental restorative materials.
As stated in our pervious work [5], titanated Ti-based fillers can be a useful reinforcement of dental composite for resin materials.
However, titanate couplers can effectively be used to coat the inorganic fillers of dental materials to improve their dispersion and bonding with the resin matrix.

Multimedia teaching method is remarkable for its rich teaching content , vigorous style.it enhanced teaching standard by pictures and texts, sound and body, vividness and directness ,science and accuracy.
Here, what need special pointed out and special advocates is that teachers should be more aimed at the actual needs of the teaching content, teaching materials of specific characteristics and students' practical psychology then design psychological health education software themselves.
In learning, memory and other issues’ study, the use of computer multimedia teaching techniques, showing a vivid picture with image and sound, overcoming the a single, rigid, distortion of the experimental materials limitation, guarantee the best experimental techniques for the further study of real life events and other psychological processes of learning and memory beyond the dull boring characters the of artificial designed words and table.
[2] Jiao Yu: On the Conjunction between Multimedia Teaching and Mental Health Education in College Students, Changchun Education College Journal ,2007,(4).

Hence, the new model could predict the homogenization extent of alloying elements in materials after homogenization.
Acknowledgement This study was financially supported by the National Natural Science Foundation of China (item number: 51005198).
Mathematical modeling of solute segregation in solidifying materials, Int.
PENG: Journal of Wuhan University of Technology-Mater.

Pigment Printing of Natural Dye from Red Mangrove Bark on Silk Fabrics Monthon Nakpathom1, a, Buppha Somboon1, b and Nootsara Narumol1, c 1National Metal and Materials Technology Center, National Science and Technology Development Agency, Klong 1, Klong Luang, Pathumthani 12120, Thailand amonthonn@mtec.or.th, bbupphas@mtec.or.th, cnootsaran@mtec.or.th Keywords: pigment printing, natural dye, red mangrove, silk Abstract.
Experimental Materials.
Nassar: The Journal of The Textile Institute Vol. 100 (2009), p. 486

Such as Mexico the rock surface natural impermeable to water the United States set; using chemical materials to increase the efficiency of water treatment in water.
With the development of society, the progress of science and technology, people gradually realizes the rainwater reuse can improve the natural water cycle, also construction operation pressure to improve the city's ecological environment of city flood disaster, alleviate the impact load of sewage treatment plants , because of excessive exploitation of groundwater caused by control the city ground down trend, to prevent seawater intrusion underground aquifer[3].
It is first chooses the permeable pavement materials and drainage ditch, rain water into river or water storage facilities, and the drainage ditch is arranged on the pebbles, contamination of surface runoff in the leaves and large particles were preliminary removal.3)We set the pervious pipe water catchment facilities in green space.
References [1] DENG Feng,CHENG Wei,Analysis of Percipitation Treatment by Wetland and Reuse in Small Residential Region, Journal of Nanjing Architectural and Civil Engineering Institute[J],2002.3：28-32 [2]Fakt,IRCSA/Europe,l0th Internatonal Conference on Rainwater Catchment Systems [M].Mannheim(Germany),MargrafVarlag,2001.3:297 [3] AnayaMG.TovarJS,Different soil treatments for harvesting water for radish production in the Mexicovalley[M],Pro.

Materials and Methods Materials.
Acknowledgements This work was financially supported by the China Natural Science Foundation (31271819).
The Journal of Pathology, (2008), 214: 149–160.

Research on Heritage Values of Industrial Buildings of Xi’an in the First Five-year Plan Period (1953-1957) Yi Xiao 1, 2,a * , Yunying Ren 1,b ,Shuhu Liu 1,3,c 1School of Architecture, Xi’an University of Architecture & Technology, Xi'an, China, 710055 2 School of Architecture, Henan University of Science & Technology, Luoyang, China, 471023 3 College of Architecture, Fuzhou University, Fuzhou, China, 350108 axyhaust@163.com, brenyunying@126.com, c lsh1200@qq.com Keywords: industrial building; the First Five-year Plan Period; heritage value Abstract.
The Xi'an modern industrial building reflects the industrial building development of Chinese interior general cities in modern times, meanwhile it is an important chain link in the history of Chinese architecture and the material testimony of Xi'an modern architecture development, so research on it has great value and significance [4].The Xi’an industrial building, as an indispensable part of Chinese industrial heritage and an organic composition of Xi’an modern city's appearance, its historical and cultural value has been realized by people, and research on it becomes more and more deeply.
Therefore, these industrial buildings are the material testimony of history influenced by multi-culture.
Finally, the material and structure or special construction method of some industrial buildings may have the technological research value in architectural history.
Journal of Southeast University (English Edition).