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Study on Influence Factors of Ammonia Oxidizing Bacterias Removing Nitrogen in Wastewater Shan Mingjun1, Li Yang1, Peng Wenxia1, Liu Hongyu1, Chen Xiangqian2 1School of Chemical Engineering University of Science and Technology Liaoning Anshan, China 2School of Chemical Engineering Northwest A＆F University of science and technology Yangling, China 1e-mail: shanmj@126.com2e-mail: qian329195337@sina.com Keywords：Ammonia oxidizing bacteria; coal liquifaction wastewater; nitrogen removal Abstract.The large amount of nitrogen in the water environment had casued the serious deterioration of water environmental quality.
Materials and Methods Experimental material The Coal liquifaction wastewater used in laboratory is got from a coal to oil company of Yunnan in China.
Impact of nitrogen loading on nitrogen removal rate Nitrogen, as the main material of anaerobic ammonia oxidation reaction, its concentration has large impact on nitrogen removal rate.
Zhangn, “The integration of methanogenesis with denitrification and anaerobic ammonium oxidation in an expanded granular sludge bed reactor,” Journal of Environmental Science.

China. 2 Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing, P.R.
Materials and Methods Sampling Materials were collected from the municipal WWTP in Zhuji city.
Sludge reduction by predatory activity of aquatic oligochaetes in wastewater treatment plants: science or fiction?
Technol.: a journal of the International Association on Water Pollution Research.

The role of a small amount of aluminum in the sputter target is to improve the properties of the contacts on p+ implanted material, which is achieved by a surface doping with aluminum [5].
Justice, Material Science Forum 858 (2016) 797-802
Ostling, ECS Journal of Solid State Science and Technology, 6 (4) (2017) 197-200
Murakami, Materials Science and Engineering: B, Volume 98, Issue 3 (2003) 286-293.

Norazidah1,f 1Faculty of Applied Sciences, Universiti Teknologi MARA, 40450 Shah Alam, Selangor, Malaysia 2 Faculty of Applied Sciences, Universiti Teknologi MARA Pahang, 26400 Jengka, Pahang, Malaysia asitiawe@yahoo.com, bdazhan@pahang.uitm.edu,my, csyed237@salam.uitm.edu.my, dazman615@pahang.uitm.edu.my, enhidayah_86@yahoo.com, fzie_0404@yahoo.com Keywords: Bi-2223; phase formation; superconductor; Yb-substitution Abstract.
Oxalate coprecipitation method using metal acetates and oxalic acid as starting materials was selected since it is economical and simple without pH control [5].
Khizar, Effect of rare-earth (Eu, Yb and Ag) substitutions on superconducting properties of the Bi1.7Pb0.3Sr2Ca2-xRx(R = Eu, Yb and Ag)Cu3Oy system, Journal of materials science, 34 (1999) 5833-5838

Tensile and Compressive Creep Behavior of IN718 Alloy Manufactured by Selective Laser Melting Zhen Xu1,2,3,a, Chuan Guo2,3,b, Zhenrong Yu2,3,c, Xin Li1,2,d, Xiaogang Hu2,3,e and Qiang Zhu2,3,f* 1Harbin Institute of Technology, Harbin, China 2Southern University of Science and Technology, Shenzhen, China 3Shenzhen Key Laboratory for Additive Manufacturing of High-performance Materials, China a11849535@mail.sustech.edu.cn, b11756015@mail.sustech.edu.cn, cyuzr@sustech.edu.cn, dlix@mail.sustech.edu.cn, ehuxg@sustech.edu.cn, fzhuq@sustech.edu.cn Keywords: Creep; IN718; Selective laser melting Abstract.
Guttmann: Beijing: Science Publishing.,1989. 15. ] ∆μp=PHVm, (1) where PH is the vacancy hydrostatic stress and Vm is the partial molar volume of crystal.
Chen: Chinese Journal of Rare Metals., 2 (2012). 171-177. ] ∆μvp=RTln1-Cvp1-Cv, (2) where Cvp is the vacancy concentration caused by hydrostatic stress, Cv is the vacancy equilibrium concentration under stress-free condition, R is the gas constant, and T is the absolute temperature.
Acknowledgement This work was financially supported by the National Key Research and Development Program of China (No.2017YFB0702901), Shenzhen Science and Technology Innovation Commission under project (No.JCYJ20170817111811303, KQTD20170328154443), Shenzhen Key Laboratory for Additive Manufacturing of High-performance Materials(ZDSYS201703031748354).

Mawby1 1School of Engineering / 2Department of Physics, University of Warwick, Coventry, CV4 7AL, UK 3Catalan Institute of Nanoscience and Nanotechnology (ICN2), CSIC and the Barcelona Institute of Science and Technology, Campus UAB, Bellaterra, 08193 Barcelona, Spain a L.Woodend@warwick.ac.uk, b P.M.Gammon@warwick.ac.uk Keywords: Silicon Carbide, MOSFET, Cryogenic, Characterisation.
Chen et al., “Cryogenic Characterization of Commercial SiC Power MOSFETs”, Materials Science Forum, Vols. 821-823, pp. 777-780, 2015
Gammon et al., “The Cryogenic Testing and Characterisation of SiC Diodes", Vols. 778-780, Materials Science Forum, pp. 863-866, 2014
Potbhare et al., “Numerical and experimental characterization of 4H-silicon carbide lateral metal-oxide-semiconductor field-effect transistor”, Journal of Applied Physics 100, 4, 2006 [10] N.

The processing parameters and material properties used in present numerical simulation are list in Table 1.
Table 1 Parameters and material properties used in numerical simulation Aluminum alloy grade 3003 Pouring temperature Tin [K] 1023 Liquidus temperature Tl [K] 927 Pouring temperature Tout [K] 1003 Solidus temperature Ts [K] 916 Diameter of throttle bore D0 [mm] 1.8 Density (927K) ρ [kg.m-3] 2350 Diameter of inner gate Din [mm] 4.5 Specific heat Cp [J.kg -1.K -1] 1090 Diameter of mold D [mm] 32.5 Thermal conductivity λ [W.m-1.K -1] 95 Casting speed Vc [mm.s -1] 2.0, 2.2, 2.5 Laminar viscosity, µ [Kg m-1s-1 ] 0.0013 Constant A [W/m2 ] 3.0×106 Latent heat ∆Hm [kJ.kg -1] 386 Constant B [W/m 2.5 ] 1.44×10 7 Shrinkage of solidification α 6.5% Gravitational acceleration g [ms-2 ] 9.8 Height from throttle bore to liquid surface in inside ladle ∆H [mm] 200 Effective heat transfer coefficient in second cooling zone h [W/m 2K] 600 Results and Discussion The flow field of the melt in the liquid pool of the solidification zone at different casting
Acknowledgement Financial supports from Natural Science Foundation of China (Granted No. 50575076) and Program for New Century Excellent Talents in University are gratefully acknowledgement.
Yu, Chinese Science Bulletin Vol. 43 No. 11 (1998), p. 911 [3] W.W.
Leo, Journal of Materials Science 2004, Vol. 39 No.16-17 (2004), p. 5607 [5] S.

A negative feature of these materials is the small or even non-existent ductility at room temperatures [1,2].
Acknowledgements This work was financially supported by the National Natural Science Foundations of China under Grant No. 50361002, Guangxi Univeristy Key Program for Science and Technology under Grant No. 2003ZD04 and the Natural Science Foundations of Guangxi under Grant No. 0480004.
Zecca: Nuclear Instruments and Methods Section B Vol. 194 (2002), p.519 [17] W.Deng, J.T.Guo, R.S.Brusa, G.P.Karwasz, A.Zecca: Materials Letters Vol. 59 (2005): p.3389 [18] V.
Zecca: Journal of Alloys and Compounds Vol. 421 (2006), p.228

The single teaching mode, simple accumulation of teaching materials, low intelligence, small amount of visiting volume, and low usage rate, etc, make the main problems in teaching.
Thus the teacher should not only supply teaching materials, but also organize and guide carefully each teaching step, including creating learning situation on line , guiding learning strategy, interaction and feedback.
Application of web data mining technology in online education Nowadays Web Data Mining Technology has been widely used in various fields such as business affairs, medicine science, the Science and Engineering etc.
With the help of these data, the system will automatically make comprehensive analysis and decide whether the teaching materials, the depth and scope are suitable, whether the teaching medium is suitable to the teaching materials and teaching objects, whether the teaching hour is proper and whether the teaching strategy is proper.
Conclusion The famous educator Blum’s learning theory goes like this: “Almost all the students can finish work or reach the learning goals as long as the teachers provide the students with appropriate materials, moderate help and sufficient time in teaching at the same time.”

Agriculture wastes-- wheat straw is used as raw material to take place of cotton and wood pulp in this research.
Currently wood pulp and cotton pulp are mainly raw materials used to produce microcrystalline cellulose.
In this research, wheat straw is used as raw material with its abundance and cheapness.
Experimental Materials.
Journal of Shandong University (In Chinese), 2006, 44(8), 860-864 [2] Meiyun Zhang, Yongjian Xu and Wenjuan Pu.