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As an important material, CoFe2O4 have been found in many applications such as data storage, permanent magnets, catalysis, ferrofluids, magnetic resonance imaging, and microwave devices because of their excellent chemical stability and mechanical hardness, wear resistance and electrical insulation, moderate saturation magnetization of about 80emu/g, high electro magnetic performance and strong magnetic properties [5–8].
These ferromagnetic nanomaterials could become the new magnetic materials with the potential application in magnetic resonance imaging, drug delivery, and high-density information storage.
Acknowledgments The work was financially supported by the National Science Foundation of China (Grant No. 20871083).
Lim: Microchemical Journal Vol. 94 (2010), p. 148 [6] H.

Finite element simulation Model situation Table 1 Material and thermal characteristic value Characteristic value Foundation Ground base specific heat (kcal/kg ℃) 0.25 0.2 specific weight (kgf/m3) 2500 1800 thermal conductivity (kcal/m hr ℃) 2.3 1.7 Convection coefficient (kcal/m2hr℃) surface 12 12 Steel template 12 - Atmospheric (℃) 20 - 91 days compressive strength (kgf/cm^2) 270 - Intensities coefficient a=4.5 b=0.95 - 91 days E (kgf/cm^2) 2.7734e+05 1.0e+04 Thermal expansion 1.0e-05 1.0e-05 μ 0.18 0.2 coefficient K=33.97 a=0.605 - The finite element analysis software Midas was used to build this model, and taking the computation precision and efficiency requirements into account, the size of both ground base and foundation is 0.8×0.4×0.6m.
Analysis and Results The mass concrete structure was poured in grading, and the concrete material age and thermal characteristic value were different in different pouring stage, so the hydration heat had to analyze according to different stages.
It is difficult to analyze the hydration heat of the mass concrete structure which is consist of different material and has different heat transfer characteristics.
Acknowledgements This research was supported by the National Natural Science Foundation of China (General Program Grant No. 51179097).
Journal of Shijiazhuang Railway Institute,1999,12(9):74-76

Working medium is a multicomponent system (accounting residual air), i.e. the reacting components have random mass (materials in the reaction chamber).
Comprehensive analysis of gas media for depositing protective diffusion coatings (in Russian), Basic Problems of Material Science.
An Engineering Journal.

Research on Diaphragm Reinforcement Design of Continuous Composite Girder Bridge with Corrugated Steel Webs Wenhu Li1, a, Dalong Ren1, 2, b and Fenghua Zhao1, c 1 Changzhou Key Lab of Structure Engineering and Material Properties, Changzhou Institute of Technology, Changzhou 213002, China 2Southeast University, Nanjing 210096, China aliwh@czu.cn, bchongrdl@163.com, czhaofh@czu.cn Keywords: bridge engineering; corrugated steel webs; diaphragm; reinforcement.
Design and application of PC composite box-girder bridge with corrugated steel webs, Applied Mechanics and Materials, 71-78 (2011) 1168-1172
Zhou, Experimental research on prestressed concrete composite box girders with corrugated steel webs, Journal of chang' an university: natural science edition, 5 (2009) 64-70

So it is necessary to use finite element means to optimize the structure, which can save more materials in the situation of ensuring sufficient strength, stiffness and stability of each elment in the structure.
The input contains structure form, lifting performance(maximum lifting moment, maximum lifting weight, etc), material, limits of state variables and geometric parameters, etc.
Acknowledgments This study was supported by National Natural Science Foundation of China (50775132) and a major research program of Shandong Province (200 890 101 043).
Cai: Structural Optimum of Main Tower-Frame of Mast Crane [J], Journal of Chongqing Jianzhu University, 1996.3

Mangrove wetland's function of purifying water has gradually declined.(3) Material Production: The material production of the estuarine wetland of Shenzhen River and Xinzhou River mainly embodied in Gei Wai fishpond depression, off-shore tidal flat, mangrove forest and the waters.
The biological, habitat and ecological system diversity of the wetland provide education and scientific research with objects, materials and test base.
Acknowledgements This work was financially supported by the 2009 Guangdong water resources science and technology plan projects Foundation (2009-07),National Natural Science Foundation of China (No. 41301285) and National Key Technology Support Program(NO.2012BAC06B03).
[5]Xiaoxing Zheng, Hao Zhang, and Rongxiang Wang: Journal of Fudan University (Natural Science), vol. 45, No.6, 2006, pp. 732-737 (in Chinese)
[10]Cunli Liu: Journal Of Nanjing Xiaozhuang University, No.6, 2009, pp.95-100 (in Chinese).

Introduction Concrete is a traditionally-used building material whose crack resistance can be improved by the addition of even relatively small amounts of different types of fibres.
These parameters characterize the tested materials in more detail and proceed from the combination of linear fracture mechanics principles and the concept of cohesive forces acting on the faces of the fictitious (effective) crack increment.
Thus the inclusion of fibres could not postpone the crack initiation in the material.
LO1408 AdMaS UP) for the analytical part of the research and with the Hertha Firnberg post-doc fellowship of the last author provided by the Austrian Science Fund (FWF) within the project No.
Hordijk, Tensile tests and fracture analysis of concrete, Journal of Structural Engineering, 112 (1986), 2462–2477

Fedyk2 1 Institute of Low Temperature and Structure Research, Polish Academy of Sciences, Okolna 2, 50-422 Wrocław, Poland 2 High Pressure Research Center, Polish Academy of Science, ul.
The influence of particle size on the optical properties of semiconducting materials is well known.
Jaccard has reported on the size-effect in semiconducting particles and also in ferroelectric materials [7].
Recently the effect of size on the luminescence of rare-earth doped nanostructured materials has been widely investigated [13,14,15,16].
Bettinelli, Journal of Materials Research Vol. 19 (2004), p. 3398 [17] J.

Experimental and Material Materials.
Gypsum plaster (GP) Type 1, coconut fiber (CF), and water hyacinth fiber (WHF) were the materials used to generate the gypsum board [1].
Krittacom, Microstructure and Mechanical Properties of Gypsum Board Produced from Water Hyacinth Fiber, Materials Science Forum, 1085, 119-126 (2022)
Suntijitto, Properties of natural fiber cement materials containing coconut coir and oil palm fiber for residential building applications, Construction and Building Materials 95, 664-669 (2015)
Sangchot, Energy balance in Al-Co open-celled foam of transpiration cooling, Applied Mechanics and Materials, 575, 41-45 (2014)

Vol. 2. 1990, Materials Park: ASM International
Materials Science and Engineering: A, 1998. 257(1): p. 100-107
Journal of Materials Processing Technology, 2005. 159(3): p. 369-376
Vol. 9. 2004, Materials Park: ASM International
Materials Science and Engineering: A, 1998. 257(1): p. 153-164