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According to [8], welding is a joining process producing coalescence of materials by heating them to the welding temperature, with or without the application of pressure or by the application of pressure alone, and with or without the use of filler metal.
Pearson correlation analysis was employed to investigate the relationships between human engineering factors and safety performance.
International Journal of Innovative Technology and Exploring Engineering 8(6), (2019) P 711-716 [7] OGP Human factors engineering in projects Report No. 454.
Journal of Construction Engineering and Management, 121, 166–171. doi.org/10.1061/(ASCE)0733-9364, (1995) 121:2(166)
Architectural Engineering and design management journal, 4(3-4):221-238. (2008).

The Study of Safety Management in Constructional Engineering Rongjie Zhu1,a, Ying Peng2,b, Yuishui Chen3,c 1,2,3college of architecture and environment, Sichuan University, Chengdu, Sichuan, China a349187531@qq.com, b363418071@qq.com, c493548911@qq.com Key words: Safety management; Constructional engineering; Construction enterprises Abstract.
This thesis analyzes these major safety problems in constructional engineering management and gives effective measures that should be adopted in constructional engineering management in order to avoid accidents in building projects by improving the safety management level of constructional engineering.
Unqualified Building Materials and Machineries.
Materials are the material condition of construction.
Secondly, the information of materials should be mastered and the best should be picked out to stock.

Experiments of Laser Surface Engineering for the Green Remanufacturing of Railway Coupler C.Y.
To the E class steel, typical coupler metal, the related laser process variables and materials were test and optimized.
Mukherjee: Journal of Materials Science Vol. 33 (1998) p. 1287 [5] F.
Key Engineering Materials Vol. 218-220 (2002) p. 187 [6] D.
Singh: Journal of Materials Science Vol. 33 (1998) p. 3677 50µm

Application Progress and Vision of Biocereamics Utilized in Bone Tissue Engineering Liu Yi a BME College, Tianjin Medical University, Tianjin, China a Pisces_cream@163.com; Anjian630712@sina.com Key words: Bioceramic, Bone tissue engineering, HA, CPC, BG, application Abstract: From human bones to animal bones, from stainless steel to plastic, researchers have tried numerous types of materials to apply in the bone replacement for human-beings.
But deal to their limitation on fatigue, stability, mechanical strength and many other properties, almost all those past materials were superseded by bioceramics today, which perform not only those advantages possessed by the old materials, but also hydrophilic, biocompatibility, thus ensured them a promising future in the region of bone tissue engineering.
Good biocompatibility of bioceramic materials made them perfect artificial synthesize scaffold material for bone tissue engineering.
Table 2: Compression Resistance of PHBV, PHBV/BG,PAM-PHBV/BG [13] Scaffold Pure PHBV PHBV/BG PAM-PHBV/BG Compressive Strength/MPa 0.59±0.16 1.39±0.01 0.91±0.37 Maximum Bearing Capacity /N 37.34±9.89 88.17±0.96 57.94±23.66 Vision Now, more and more attention have been paid on the development of bone tissue engineering scaffold materials and successes were achieved in various materials.
Biomedical Engineering Vol. 19 (2007), p. 281 [5] T.

Decoration engineering as an important force in building industry, it has been plagued by low levels of technology management, engineering and serious waste problem over years, how to optimize the process to achieve value added decoration has become an urgent problem.
Construction phase construction plan is to continue to improve and strive to the best total cost of inputs complete layer content. 4 Decoration Engineering Value Optimization System Index (1) direct value indicators of decoration engineering Direct index of the decoration project including labor, materials, machinery, etc., according to the characteristics of the decoration engineering, artificial and materials is the most important.
Decorative materials and complex, the quality and the grade difference, decoration engineering materials and to receive the objective influence of owner, therefore, adornment material is relatively difficult to control.
Architectural decoration project cost of raw materials occupies most of engineering cost, on the material analysis can from cost of raw materials, the material is common, project material processability, etc were analyzed
Reference [1]Jia xiaohui.Research on Design and Application of Decoration Engineering Based on Value Engineering[D].Chongqing University,2010

Literature Review In recent years, the development of biodegradable hydrogels for tissue engineering has advanced significantly, with a focus on both natural and synthetic materials.
However, these materials can degrade quickly and lack mechanical strength, often requiring modification or blending with synthetic polymers to improve their stability and functionality in tissue engineering applications [6].
"Poly (Vinyl Alcohol) Hydrogels: The Old and New Functional Materials".
Journal of Materials Science: Materials in Medicine, vol. 18, no. 10, 2007, pp. 1961-1968. https://doi.org/10.1007/s10856-007-3072-1
Journal of Materials Science: Materials in Medicine, vol. 6, no. 2, 1995, pp. 71-75. https://doi.org/10.1007/BF00120410

Silt and Clay with Low Liquid Limits as Fill Materials for High-Speed Railway Embankments in China JIANBO Fei1,a, CHANGSUO Yang 2,b, YUXIN Jie3,c and XUETAO Wang1,d* 1Underground Polis Academy, Shenzhen University, Shenzhen, China 2China Railway Economic and Planning Research Institute, Beijing, China 3State Key Laboratory of Hydroscience and Engineering, Tsinghua University, Beijing, China afeijianbo@szu.edu.cn, bycs1097@163.com, cjieyx@tsinghua.edu.cn, dxuetao.wang@szu.edu.cn Keywords: railway; fill material; embankment; silt; clay; low liquid limits Abstract.
As a further step, it is crucial to make suggestions on optimization-related fill material provisions in railway standards so as to improve the engineering economy.
DIN 18196(2006): Earthworks and foundations - Soil classification for civil engineering purposes.
Giacchino, in: Proceedings of the international conference on soil mechanics and geotechnical engineering, Blkama Publisher, Vol. 3 (2001), p. 2195–2198 [10] L.
Russell, in: Proceedings of a three day conference on advances in geotechnical engineering, London, UK, (2004), p. 29–31 [12] Q.

Based on massive quantities of exploration materials, this study analyzed engineering features, distribution status, and the feasibility of silty clay to be used as the bearing layer of the pile in Layer ④2 .
The engineering features of soft soil have long been the major subject in the research of geotechnical engineering.
Features of Soft Soil Foundation in Jiaxing City Overview of Engineering Geology.
Engineering Features of Foundation Soil Mass.
Evaluation of Engineering Features of Layer ④2 Based on relevant exploration materials, the principle bearing layers of piles in Jiaxing City include: Layer ④1(clay), Layer ④2(silt layer), Layer ⑥(clay), Layer ⑦(sandy silt, silty sand), Layer ⑨(clay), and Layer ⑩(sandy silt).

Engineering project risk Engineering activity is one of the most basic social activity way, is in the human society and the development of material basis.
Engineering is the creation[1].
Engineering project risk explain structure model III.
Engineering project risk ISM model analysis From Fig.2 shows the hierarchical structure model can see engineering project risk factors and their mutual relationship.
Engineering project risk has obvious hierarchy, surface risk including material risk (S2) and schedule risk (S6) direct risk factors.

Research on Material Selection Standard of Graded Crushed Stone Base Course for Municipal Road Kai Liu1,2,a, Fang Wang3,b, Weihua Zhang2, Yuanrong Wang4 1Civil Engineering Center for Post-doctoral Studies, Hefei University of Technology, Hefei, Anhui, 230009, China 2School of Transportation Engineering, Hefei University of Technology, Hefei 230009, Anhui, China 3School of Civil Engineering, Anhui University of Architecture, Hefei 230601, Anhui, China 4Hefei Key Project Construction Administration, Hefei 230001, Anhui, China aronaldo_1@163.com, bwf7110807@163.com Keywords: municipal road, material, material selection standard, graded crushed stone Abstract.
The research results promote the popularization and application of graded crushed stone base course on municipal road engineering in Anhui province.
While the related specifications at home and abroad have given certain requirements about technical indexes of raw materials, the requirements are selected according to the average level of various materials’ properties.
Crushing value is tested according to crushing value test of coarse aggregate (T0316-2005) in test methods of aggregate for highway engineering (JTG E42-2005).
These materials can be used for various grades of municipal roads.