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Introduction Polyurethanes (PUs) are a very large family of extraordinarily versatile and useful engineering materials [1].
Experimental Parts Materials and instruments.
Progress in Materials Science Vol 52(2007), p. 915 [4] D.
Lakshmi: Journal of Applied Polymer Science Vol. 53(1994), p. 31 [6] D.
Chen Journal of Polymer Science Part A: Polymer Chemstry Vol. 25(1987), p. 2543 [16] H.

Electro chemical and catalytic applications using various crystallographic forms of MnO2 over other oxides materials makes it a novel material.
Materials and Methods Synthesis of MnO2 and PANI-MnO2 Nanocomposites.
Suib, Structure, Porosity, and Redox in Porous Manganese Oxide Octahedral Layer and Molecular Sieve Materials, Journal of Materials Chemistry. 18 (2008) 1623-1631
Epstein, Polyaniline Oriented Films and Fibers, Synthetic Materials. 41 (1991) 1-2
Journal of Materials Science: Materials in Electronics, 27(7) (2016) 6816-6822.

The application of the finite element in analyzing the bubble in the ship wake ZHANG Qun ,WANG Yingmin School of Marine Science and Technology, Northwestern Polytechnical University, Xi’an China School of Marine Science and Technology, Northwestern Polytechnical University, Xi’an China beautyzqc@163.com, ywang@nwpu.edu.cn Keywords: finite element method, bubble in the ship wake, point displacement, pressure distribution Abstract: The finite element method was used to analyze the bubble in the ship wake.
The single bubble model in the ship wake was created and studied after the material property parameters of the bubble were got by the finite element computation.
Three different radiuses of bubbles in the ship wake were analyzed, and the parameters of the bubble materials were gained by ANSYS as the table-1 shows.
[J] Chinese Journal of Theoretical and Applied Mechanics,2006,38(6):749-759 [4] Guerri L, Lucca G, Prosperetti A.
[J] Chemical Engineering Science,2005,60(1):179-186 [6]Blake JR, boulton-Stone JM, Tong RP, Boundary integral methods for rising, bursting and collapsing bubbles in H Power, ed BE,[J] Applications in Fluid Mechanics, Computational Mechanics, Publications UK,1995 4:31-40 [7] Wang C, Khoo BC, Anindirect boundary element method for three-dimensional explosion bubbles [J] Journal od compute Phys,2004,194:451-480 [8] Leng HJ, Lu CJ, Study on partially cavitating flow of an axisymmetric body [J] Journal of Shang Hai Jiao Tong University ,2002,19(1):99-123

Experimental results show possibilities of polymer materials structure assessment.
Demand for nondestructive testing (NDT) of polymer composite materials have grown rapidly since their introduction.
Acknowledgments Research described in this paper was supported by the Russian Science Foundation, project no. 15–19–00096.
The methodology of determining acoustical structural noise of metal Machines, Technologies, Materials, 11 (2013) 40-43
Voronkova, Ultrasonic structural probing of products based on materials with a complex structure by analyzing the statistical characteristics of the structural noise, Russian Journal of Nondestructive Testing, (51) 6 (2015) 360–373

The simulation results demonstrate the good thermal insulation performance of the regenerated glass pumice as a new kind of external wall materials, and the feasibility of the application of this environmentally friendly material to the wall insulation system in energy conservation building is also promoted.
Introductions Regenerated glass pumice is a kind of artificial porous lightweight materials made from waste glass after series process of crushing, combustion and foaming.
Journal of Building Structures, 2004, 25(6): 93-98 [4] Zhilei Li, Gang Gan, Jingchun Tang.
Journal of Zhejiang University (Engineering Science), 2004, 38(7): 122-127 [5] Jun Zhang, Zhenli Huang, Zhi-hua Li.
Journal of Harbin Engineering University, 2009, 30(12): 1356-1365 [6] Qinyuan Zhang, Hongxing Yang.

Experimental result In order to save the time, cut the material 40Cr with carbide chip P20 by end milling, the hardness of the material is 200-220HB, without coolant.
Journal of Nanjing University of Technology(Natural Science Edition), Vol. 34(2012) No.1,pp.51-55.
Journal of East China University of Science and Technology (Natural Science Edition), Vol.32(2006) No.7, pp.860-863.
Journal of Shenyang Architectural and Civil Engineering University(Nature Science), Vol.17(2001) No.3, pp.197-199.
Journal of System Simulation, Vol.19(2007)No.24,pp.5643-5647.

In addition, this university is featured in majors of science and engineering, so the books of mathematical science and chemistry are preferred; moreover, books of language and literature are frequently borrowed, as is shown in Table 2.
According to the statistical results, of all the top 20 readers, 2 are from College of humanities and arts, 6 are from College of mechanical and power engineering, 5 are from School of electrical and information engineering, 3 are from School of metallurgy and materials engineering, 1 is from School of civil engineering and architecture, 1 is from School of petroleum engineering, 1 is from library, and 1 is from School of mathematics and science.
Table 3 Ranking of units of readers Ranking Organization Quantity of readers 1 College of mechanical and power engineering 6 2 School of electrical and information engineering 5 3 School of metallurgy and materials engineering 3 4 College of Humanities and Arts 2 5 School of civil engineering and architecture 1 5 School of petroleum engineering 1 5 Library 1 5 School of mathematics and science 1 Conclusion This study, with CQUST as an example, carries out statistical analysis of library resources in universities, and finds that the library book-borrowing is on one hand in proportion to library funding, and on the one hand related with readers’ demand.
For example, O-class and I-class books are widely borrowed by readers in school of science and technology.
Journal of Library Science in China, 2001, (1): 8-10

Synthetic resorbable materials were intended as an inexpensive substitute for natural bone.
Materials for bone tissue substitutions Various materials are used in modern dental and maxillofacial surgery for bone tissue substitution and reconstruction.
Synthetic resorbable materials were intended as an inexpensive substitute for natural bone.
The development of new medical technologies enables use of achievements in material science, biochemistry, molecular biology and genetic engineering while creating new combined synthetic materials for bone grafting (osteoplasty).
The Open Dentistry Journal 2011;(5): 96-104

Introduction WC-Co cemented carbides are materials of choice for tools and structural components by virtue of their unique combination of hardness, strength and wear resistance.
Very little prior work has addressed the microstructure of these materials [4].
Considering the microstructure of these materials will have very important impact on the final products, especially the microstructure of the substrate after the shaping process, the microstructure of these materials should be analyzed.
It also has been found that stress concentration and residual stress will be higher at the interface and can substantially reduce the load required to fracture materials [8].
MECHOLSKY, Fracture analysis of cobalt-bonded tungsten carbide composites, JOURNAL OF MATERIALS SCIENCE 25 (1990) pp4949-4956 [7] F.

Net work not only brings a strong storm of science and technology, but also refreshes people’s ability to accept new things.
“Introduction to using the Internet information to promote university students' employment.”Journal of Wuhan Polytechnic University. vol. 27，pp：115-117.
Journal ofZhenjiangCollege. vol. 21，pp：39-41.
“Theory of university students' employment network science building” Journal of henan vocational technical teachers college (vocational education edition). vol.6，pp：74-76.Jue.2008 [7] Wang Hui.
Journal ofBeijingUniversity ofPosts and Telecommunications (SocialSciences Edition). vol.12，pp：14-17.