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One of the greatest emergency situations that can occur in road tunnels is represented by fire, involving all conditions relating to the nature and density of combustible materials existing, smoke, toxic gases and the combustion debris from firefighting and action in order to minimize the negative consequences of it.
Conclusions The article reveales the importance of using sprinklers, without the effects of a fire event occuring in a road tunnel would be more severe for users, material and environment.
Subhajit, Impact of tunnels in environment, in International Journal of Engineering Trends and Technology (IJETT) Volume 4, Issue 8 (2013) 2-3
Fleischmann, Calibrating a FDS simulation of goods vehicle fire growth in a tunnel using the Runehemar fire experiment, Journal of Fire Protection Engineering.
Lea, Fires in tunnels, The Royal Society Mathematical, Physical & Engineering Sciences. 12 (2009) 7-8

The structures and morphology of materials were analyzed by XRD and SEM respectively.
Perovskite-type materials promote the electron excitation from the valence band to the conduction band and have an electron deficiency or hole in the valence band, which generates electron/hole pairs and bring about redox reactions.
Some perovskite materials behaved good photocatalytic activity in dye waste treatment[4-6].
Parida, ,Chemical Engineering Journal.
Y 1aterials Engineering（ICMEN2014on Materials

The synthesis of porous materials has always been challenging.
Put foam materials into PdCl2 solution at 37℃, and take out after 5 min.
Journal of Materials Science &Engineering, Vol.22 (2004), p.452
Progress in Materials Science, Vol.46 (2001), p.559
Microporous and Mesoporous Materials, Vol.48 (2001), p.255

Multi-parameters Water Quality Model Uncertainty Analysis Yan Li1, 2, a, Ziming Wang3, b, Longjiang Zhang2, c and Deguan Wang4 1College of Mechanics and Materials, Hohai University, Nanjing, Jiangsu, 210098, China 2 Nanjing Institute of Environment Sciences, MEP, Nanjing, Jiangsu, 210042, China 3Zhejiang institute of Hydraulics & Estuary, Hangzhou, Zhejiang, 310020, China 4College of Environmental Science and Engineering, Hohai University, Nanjing, Jiangsu, 210098, China aliyan_hhu@163.com, bwangziming1301@126.com, czlj@nies.org Keywords: Multi-parameters Water Quality Model, Uncertainty, Sensitivity, GLUE Abstract.
Freer: Journal of Hydrology Vol.249 (2001), p.11 [7] L.
Viviani: Journal of Hydrology Vol.393 (2010), p.186 [11] H.T.
Beven: Journal of Hydrology Vol.332 (2007), p.316 [12] Deguan Wang: Computational Hydraulics Theory and Application (Science Press Publications, Beijing 2011) (in Chinese) [13] R.B.
Jensen: Journal of Hydrology Vol.357 (2008), p.421 [17] S.

China 2University of Science and Technology Beijing, P.R.
After the consultation of materials and the guidance of experts, this thesis gives full scores to all the two-level indices and all the one-level indices without two-level indices.
Ma: Journal of Safety Science and Technology Vol. 1 (2012), p.133-138 [3] Y.
Deng: China Safety Science Journal Vol. 1 (2006), p.31-33 [5] X.
Guo: Chinese Journal of Management Science Vol. 3 (2006), p.65-69 [6] Z.

Introduction With the development of new-type wall materials, the application of gypsum-based composites is more and more extensive.
Experiments Raw materials, shape technology and equipment.
Firstly, gypsum cementation materials have comparatively obvious air-hardening characteristic.
Gypsum based materials plays the sulphate activator to slag.
Acknowledgements This work is supported by the National Natural Science Foundation of China under Grant No. 50972051 and Natural Science Foundation of Shandong Province under Grant No.

Henan University of Science and Technology, 2, Henan Engineering Research Center for Wear Resistance Materials, Luoyang, 471003, China aljwzq@163.com, bjiayouyanhua@126.com, czgs-2000@163.com Keywords: hydrothermal synthesis, synthesis technology, nanometer molybdenum trioxide, morphology microstructure Abstract.
Introduction Not only molybdenum trioxide(MoO3) is the main prodromal material of preparing molybdenum and its alloy material, but also it has special purposes in many functional materials, for example, synthetic sensor, catalyst, ionic conductors and potential battery electrodes, etc, because of its characteristic of electrochromics, photochromics, photo catalytic degradation and gas sensitivity[1-3].
With the development of modern science and technology, traditional molybdenum trioxide particles are so coarse that it will not be able to meet the requirements of preparing high quality molybdenum alloy material.
Rare Metal Materials and Engineering, 2005,34(5):837-848
Journal of Functional Materials, 2006(3):434-436.

Research on wear performance of nano-additives Cr-Mo-Cu alloy cast iron Chaohui WANG1,2,a, Zhuanfang ZHANG3, You WANG2,*, Xiaohua GU1, Shengxiao LI1 1 School of Materials Science and Engineering, Qiqihar University, Qiqihar 161006, PR China 2 Laboratory of Nano Surface Engineering, Department of Materials Science, Harbin Institute of Technology, Harbin 150001, PR China 3 Analysis and test center, Qiqihar University, Qiqihar 161006, PR China wch800209@126.com (*Corresponding author.
Address: Laboratory of nano surface engineering, Department of Materials Science, Harbin Institute of Technology, Harbin 150001, PR China.)
Materials properties.
The substrate material was considered to bilinear hardening materials comprising of elastic modulus and tangent modulus.
Schijve, Fatigue of structures and materials, Kluwer Academic Publishers. 2001

Overall, the HC Type-B demonstrated the best mechanical and tribological performance among other studied materials and is therefore selected for further research.
Bone and Joint Journal. 1, 74 (1992) 9-17
Composites Part A: Applied Science and Manufacturing. 115 (2018) 123-133
Key Engineering Materials. 775 (2018) 109-114
Journal of the Mechanical Behaviour of Biomedical Materials. 95 (2019) 196-204.

Introduction Starch is considered to be the one of most promising materials due to its good properties such as abundant, inexpensive, renewable, and biodegradability.
The γ-ray is a kind of high-energy electromagnetic wave, and it can be used for the degradation, graft, polymerization and crosslinking of polymeric materials.
For example, there is no need to add the initiator or catalyst, the reaction can be carried out at room temperature or even at low temperature, and it can be used for synthesizing or preparing the high-performance specialty materials which is difficult to obtain by using the conventional method.
Miao: Food Science Vol. 28(2007), p. 363
Liu: International Journal of Biological Macromolecules Vol. 47(2010), p. 218 [8] J.