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Comprehensive Assessment of Water Inrush Risk in Deep Mining of Beiminghe Iron Mine Changhong Li1,2,a, Lixin Zhang2,3,b 1Key Laboratory of the Ministry of Education of China for High-efficient Mining and Safety of Metal Mines, University of Science and Technology Beijing, Beijing 100083, China 2School of Civil and Environment Engineering, University of Science and Technology Beijing, Beijing 100083, China 3Anhui Development Mining Co., Ltd, Hanxing Metallurgical Mine Administration, Anhui Liuan 237462, China alch@ustb.edu.cn, bzlxandzy@126.com Key words: Deep mining, Water inrush, Comprehensive evaluation.
These water inrush factors relate to complex geological problems of hydro-geology, engineering geology, mining conditions and rock mechanics etc.
(2) Water-storage of water-bearing layer Water-storage of water-bearing layer is material basis of water inrush scope, which determines the scope of water damage and the extent of threat to mines after water inrush.
Filling material was constantly taken away.
[7] State Bureau of Technical Supervision: Geological Instruction of Hydrogeology and Engineering Geology of Mine (GB12719–1991), Standards Press of China, (1991) , in Chinese

Progress in adjustment of ionic liquids acidity based on the alkylation Wenlin Zhang1, a, Wei Du1, b, Xiaowen Wang1, c, Nan Meng2, d Yongjun Shao3, e, Chunli Li 1, f 1School of Chemical Engineering, Hebei University of Technology, Tianjin, 300130 2School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072 3Tianjin Plate Technology & Development Co.
Wasserscheid et al. [1] have synthesized and characterized the hydrogensulfate and tetrakis (hydrogensulfato) borate ionic liquids which are halogen-free, available from cheap raw materials and easy to prepare.
Operational simplicity, small amount of usage, high activity and acidity, reusability and selectivity are the key features of this methodology.
-Chim.Sin., Vol. 22 (2006), p.230 [32] Shaohua Bao, Nangnang Quang, et al: Chemical Engineering.

Introduction With the development of light wood frame construction in china, a large number of dimension lumbers were used, the grading and the design values of dimension lumber become the key issues.
For the advantages of full scale specimen test, it replaced the clear wood test to obtaining design specifications in the application of engineering gradually in Japan, Europe etc.
The higher MOE always contribute to a relative higher bending strength in the application and design of actual engineering, but the bending strength is not necessarily proportional to MOE [2].
Materials and Methods Specimens.26 dimension lumbers with different types and sizes of knots as the main defects of Larix gmelinii were selected.
J. 51(1) : 43-50, 2000 [3] Borg Madsen, “Structural behavior of timber”, Timber Engineering LTD. 1992, pp307-338 [4] Riberholt H. and Madsen P.H., “Strength of Timber structures, measured variation of the cross sectional strength of structural lumber”, Report R 114, Struct.

Pagliaro4 1Center for Advanced Diffusion-Wave and Photoacoustic Technologies (CADIPT), University of Toronto, Toronto, M5S 3G8, Canada 2School of Optoelectronic Science and Engineering, University of Electronic Science and Technology of China, Chengdu, 610054, China 3Diffusion-Wave Diagnostic Technologies, Toronto, M1M 2V3, Canada 4Advanced Processing Equipment Technology (APET) Co., Ltd, 20-15, Sukwoo-Dong, Hwaseong-City, Gyunggi-Do, 463-802, Korea aemail of corresponding author: mandelis@mie.utoronto.ca Keywords: heterodyne lock-in carrierography, surface recombination velocity, quantitative imaging, HF etching, Si wafers Abstract.
Lock-in carrierography (LIC) [1], an InGaAs-camera-based quantitative dynamic photoluminescence (PL) imaging methodology, has been demonstrated to be capable of all-optical and noncontact evaluation of minority carrier effective lifetime [2,3], I-V characteristics [4-6], solar-cell efficiency [4,6], diffusivity/mobility [7-10], diffusion length [7], and surface recombination velocities (SRV) [10,11] of various electronic materials and devices.
The key variables being evaluated were the wet processing equipment & methods, and the dissolved oxygen (DO) of the de-ionized (DI) water.
Future study in HeLIC imaging of dynamic SRV evolution can be made in at least three fronts: (1) by implementing higher-power lasers, the imaged area can be extended from the present 5×4 cm2 area to the entire wafer in order to achieve truly global real-time characterization; (2) the 1-D assumption (no lateral carrier diffusion) used in the current model was supported by the spread and homogenized laser beams used in the experiments (very large size compared to the carrier diffusion length), however, the carrier density were not strictly 1-D due to inhomogeneous carrier transport and recombination properties indicated by the image contrast of all the quantitative images shown in this paper, so more rigorous theoretical treatment needs to be incorporated [18,19] or developed; and (3) imaging time can be further reduced by introducing waveform engineering [20] such as frequency chirping in order to be able to better accommodate the requirement for industrial fast in-line quality control.
Acknowledgments The authors are grateful to the Natural Sciences and Engineering Research Council of Canada (NSERC) for a Discovery grant, to the Canada Foundation for Innovation (CFI) for equipment grants, to the Canada Research Chairs Program, and to the Lawrence Semiconductor Research Laboratory for their wafer donation.

Review of Technical State Assessment for Substructure of Existing Bridge with Mid-small Span Zhiwei Huanga, Qiao Huang*b and Yuan Renc Southeast University, Nanjing, 210096, China azwhuang@sohu.com, bqhuanghit@126.com, cmagren@126.com Key words: Bridge; Substructure; Technical State; Assessment; Mid-Small Span; Uncertain Analytical Hierarchy Process Method; Fuzzy Comprehensive Assessment; Uncertainty Evaluation Method.
The developmental trends of the assessment on substructure are, 1) the uncertainty evaluation methods, such as uncertain analytical hierarchy process method and fuzzy comprehensive assessment theory, will be the core of new assessing systems; 2) researching on the method, equipment and instruments of testing and inspection that can be scientifically and efficiently inspect the underwater or underground indices, and establishing uniform evaluation indices and assessment criteria based on engineering data, engineering experiences and experts’ knowledge; 3) establishing aging models of materials on the basis of influence factors and defect mechanisms are deeply studied; 4) instituting bridge assessment code with uniform evaluating indices, flexible evaluating frame and solid foundation of theoretic, to instruct the technical assessment on structure of the existing mid-small span bridge.
Bowman: Civil Engineering and Environmental Systems Vol. 8 (1991), p. 49

Grain structures The basic classification of material structures is into polycrystalline and single crystalline materials.
Materials.
Table 3 shows the materials, dimensions and geometry.
Vollertsen: Production Engineering - Research and Development 2/4 (2008) 377-383
Hirt: Key Engineering Materials, 344 (2007), 791-798

Sulak: Chemical Engineering Journal, Vol.148 (2009), p. 480- 487 [3] K.G.Sreejalekshmi, K.Anoop Krishnan and T.S.Anirudhan: Journal of Hazardous Materials, Vol.161(2009),p.1506-1513 [4] Mehmet Emin Argun and Sukru Dursun: Bioresource Technology, Vol. 99( 2008), p. 2516-2527 [5] David William O’Connell, Colin Birkinshaw and Thomas Francis O’Dwyer: Bioresource Technology, Vol. 99(2008), p.6709-6724 [6] Pratik M.
Anastassakis:.Journal of Hazardous Materials, Vol.139( 2007), p. 447-452 [8]Yin Ping, Xu Qiang and Qu Rongjun: Journal of Hazardous Materials, Vol. 169(2009), p. 228-232 [9] Emmanuel I.
-Chin Tseng: Journal of Hazardous Materials, Vol. 154( 2008), p.366-372 [14] O.
Suptil: Chemical Engineering Journal, Vol. 106(2005), p.153-161 [15] N.
Ballester: Journal of Hazardous Materials, Vol. 178(2010), p.243-248

Chakraborty3,c, Gautam Majumdar4,d 1Department of Mechanical Engineering, Dr.
Journal of Applied Engineering Research. 10:62 (2015) 128- 132
Journal of Engineering Research in Africa. 22 (2016) 184-190
Journal of Engineering Research in Africa. 23 (2016) 181-187
Journal of Engineering Research in Africa. 27 (2016) 158-166

Du, The development of magnetic materials, Physics 29(6) (2000) 323-332
Watanabe, High-water content phantoms using AC magnetic field for local hyperthermia, Heat Transfer Engineering 28(12) (2007) 1017-1022
Li, Microstructure and magnetic properties of nanosized CoFe2O4 particles, Journal of Magnetic Materials and Devices 37(1) (2006) 23-25
Yu, Effect of Mn and Cu substitution on the properties of MgZn ferrite material, Journal of Magnetic Materials and Devices 44(4) (2013) 64-66
Dai, Zinc doped cobalt ferrite: from hard magnetic to soft magnetic, Journal of Functional Materials 44(03) (2013) 345-348

Series: Materials Science and Engineering, vol. 849, no. 2020, pp. 1-9. https://doi.org/10.1088/1757-899X/849/1/012027, 2020
Tripura, "Predicting and evaluating the engineering properties of stabilized fiber-reinforced rammed earth block," Construction and Building Materials, vol. 262, no. 2020, p. 120845. https://doi.org/10.1016/j.conbuildmat.2020.120845, 2020
Kenia, "Performance evaluation of human hair fiber reinforcement on lime or cement stabilized clayey sand," Key Engineering Material, vol. 668, no. 2016, pp. 207-217. https://doi.org/10.4028/www.scientific.net/KEM.668.207, 2016
Engineering and Technology, vol. 7, no. 3.12, pp. 201-204, 2018
Materials Engineering, vol. 8, no. 5, pp. 101-108. https://doi.org/10.5923/j.ijme.20180805.04, 2018