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This collection represents the results of engineering research in materials science and materials processing technologies for modern mechanical engineering and construction which were virtually presented during the ICMEMSCE2021 held on December 6-7, 2021.
The conference aims to bring together researchers, scientists, engineers, and scholar students to exchange and share their experiences, new ideas, and research results about all aspects of materials science in education, and discuss the practical challenges encountered and the solutions adopted.

Analyzing the Implement of Whirling Clarification Technique in Wastewater Treatment Tong Zhengong1,a 1 School of Civil Engineering of East China Jiaotong University , Nanchang , China a E-mail：zzggtt@126.com Key Words: coagulation, micro-whirling reactor, whirling clarification tank Abstract: The Micro-Whirling Coagulation process whose core is the Micro-whirling reactor is the key to the Whirling Clarification technique.
By theoretical analysis and a large number of engineering practice shows that, in the aspect of Coagulation process the use of patented product designed of East China Jiaotong University---- Vortex reactor(Patent Number: CN00249081), can greatly improve the efficiency of the coagulation tank, to improve water quality, The purpose of to conserving energy, the provincial drug, and reducing operating costs.
Engineering application Engineering background After the treatment of sewage by chemical or biological in a workshop of Baosteel, First class pollutants has reached the discharge standard, to save water, the company's decision to carry out the production and reuse of sewage.
[J].Water & Wastewater Engineering, 2004, Vol.30 (6): 19 ~ 21 [2] Tong ZhenGong, Fang YongZhong, Hu FengPing .
Water Supply Engineering (4th version) [M].

A Simplified Calculation Method for Spatial Effect In Large-Long-Deep Foundation Pit and its Analysis Mingfeng Leia, Limin Pengb, Chenghua Shic, Yunliang Zhangd and Wenhua Lie School of Civil Engineering and Architecture,Central South University,Changsha 410075,China amingfenglei@yahoo.com.cn, blmpeng@csu.edu.cn,ccsusch@163.com, dzhangyunliang88@126.com,eLiwenhua78326@163.com Keywords: Large-Long-Deep Foundation Pit; Spatial Effects; Simplified Calculation; Soil Plasticity Upper Bound Theory; Associated Flow Rule; Equivalent Internal Friction Angle; Limit Equilibrium Analysis Method Abstract.
Amount of engineering practice indicates that the earth pressure and displacement on central wall are bigger than them on a certain range of end wall in deep foundation pit, which illustrate that the notable spatial effect exists on the end wall, and the development of earth pressure and displacement are inhabited.
l The main influence range of spatial effect lies on two ends in foundation pit, approximately 1/4 of foundation pit length, furthermore, the more notable, the nearer the ends, in that, during practice designing, support structure can be weaker at the ends for saving engineering investment.。
So, in order to full use the spatial effect and saving the engineering investment, it required to select irrespective short excavating boundary during design and construction process.
Hou: Foundation Pit Engineering Manus(BI Press, CHN 1997).

Comparision Between UTM and GRAUSS KRUEGER Projection in NIGERIA Rail Project Li-xin Jin 1, a, Lian-jun Wang 1,b and Song-lin Yang 1,c 1 School of Civil Engineering Beijing Jiaotong University, Beijing 100044, China atyyjlx@vip.sina.com, bljwang@bjtu.edu.cn, cslyang@bjtu.edu.cn; Keywords: Projection Deformation, Coordinates System, Universal Transverse Mercator projection, Nigeria railway.
This is a disadvantage in the use of UTM for large scale engineering project such rail route.
Figure 1: Map of Nigeria and Neighboring African Countries Aim and Objectives The aim of the study is compare the general projection characteristics of UTM and G-K in order to establish their deformation behaviors, which could assist engineers and surveyors in choice of map projection method for large scale and engineering applications.
When adopting the UTM projection coordinates system, due to its bigger projection deformation, it can not satisfy the requirements of survey maps and the engineering setting-out, thus UTM is not good for the reconnaissance, design and construction under the precision requirements of large scale topographic map.
Gauss Krueger Projection should be used by engineers for the mapping and setting-out of large scale engineering project due to its less deformation errors in comparison with UTM.

Problems and Suggestions of Chinese Highway Bridge Seismic Design Xiuyun Gao1,a, Shaoyi Zhang2,b 1School of Transportation Science and Engineering, Harbin Institute of Technology, Harbin, China, 150090 2School of Civil Engineering, Northeast Forestry University, Harbin, China, 150040 a gaoxiuyun2008@163.com, bzhang_shaoyi@163.com Key words: Highway Bridge; Seismic Design; Problems Analysis; Suggestions Abstract: The seismic design of Chinese Highway Bridge changed from single standard of fortification and one-step design performed nearly two decades to two-level fortification and two-stage design with the introduction of the new codes in 2008 and 2011.
The impact of the improvement will gradually be reflected in actual engineering construction and earthquake relief works.
[4] JTJ 004-89, Code for highway engineering seismic design.
Introduction to engineering fluctuations theory.
Japanese consortium Engineering Research Center, 1992.

Experimental Study on Performance of a Cross-flow Dehumidifier Runping Niu1, a, Jingdong Chen1, b 1School of Environment and Energy Engineering, Beijing University of Civil Engineering and Architecture, Beijing 100044, China aniurunping@bucea.edu.cn, btrain2010@163.com Key words: cross-flow dehumidifier; experiment; performance Abstract—Experiment was carried out to test heat and mass transfer performance of cross-flow dehumidifier using metal packing.
Journal of Solar Energy Engineering-Transactions of the ASME, 1998,120(4):289~297
Journal of Solar Energy Engineering Transactions of the ASME,1999,121(3):162~170
Joural of Engineering Thermophysics, 2004,25(4):546~549.
Journal of Solar Energy Engineering,1998,(110):98~101

Orlando: Engineering Structures, Vol. 23 (2001), p.979
Blazik-Borowa: Archives of Civil Engineering, Vol. 53 (2007), p.225
Liu: Engineering Mechanics, Vol. 16 (1997), p.49
Lu: Engineering Journal of Wuhan University, Vol. 40(s) (2007), p.414
Yang: submitted to Probabilistic Engineering Mechanics (2012), under review

Journal of Geotechnical and Geo-environmental Engineering, 1999,121(5): 364-372
Chinese Journal of Geotechnical Engineering, 2007, 29(8): 1260-1263
Chinese Journal of Rock Mechanics and Engineering, 2005, 24(10): 1778-1782
Chinese Journal of Geotechnical Engineering. 2009, 31(1): 72-76
Chinese Journal of Geotechnical Engineering, 2012, 34(1): 130-138

Coelho1,4,f 1 CEMDRX, Department of Physics, University of Coimbra, 3004-516 Coimbra, Portugal 2 School of Mechanical, Industrial and Aeronautical Engineering, University of the Witwatersrand, Johannesburg 2050, South Africa 3 Department of Mechanical Engineering, Faculty of Engineering, University of Porto, R.
The specimens were tested in a twin disc machine available at CETRIB-INEGI laboratory of the Faculty of Engineering of the University of Porto [6].
The rail was kindly supplied by REFER through the Civil Engineering Department of the Faculty of Engineering of the University of Porto.
Zhu, Investigation on the damage mechanism and prevention of heavy-haul railway rail, Engineering Failure Analysis. 35 (2013) 206-218

Application of Concrete Filled Steel Tubular Supports In the Shaft Station Hao Xie1, a *, Fengyin Zhang1, b, He Guo1, c and Baosen Zhang1, d 1School of Mechanics & Civil Engineering, China University of Mining & Technology, Beijing, Beijing, 100083, China aqq970227116@163.com, bzhangfengyin@163.com, c1033432321@qq.com, d785918403@qq.com Keywords: Concrete-filled steel tubular supports, Shaft station, Anchor net spray, Surrounding rock grouting.
The Engineering Background The buried depth of Lu Cun coal mine -270m level shaft station is 610m, its design length is 400m and servicing time is 30 years.
According to engineering analogy method, main body of supports uses 20＃seamless steel tube.
Chinese Journal of rock mechanics and Engineering, 2005, 24(16):2803-2813
Chinese Journal of rock mechanics and Engineering, 2010, 29(1):2604-2609