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Management and Production Engineering (DIGEP), Politecnico di Torino, Corso Duca degli Abruzzi 24, 10129 - Torino, Italy 2Departamento de Engenharia Mecânica, Escola Politécnica (Poli), Universidade de São Paulo, Av.
Two replicas of the reference part were fabricated by stereolithography (SLA) and digital light processing (DLP) using two machines and related proprietary materials by Sharebot Company.
While some AM processes, such as fused deposition modelling (FDM), are rather simple and accessible because of the low costs of materials and equipment, others are more complex and of exclusive use of industries [3].
While some AM processes, such as fused deposition modelling (FDM), are rather simple and accessible because of the low costs of materials and equipment, others are more complex and of exclusive use of industries [3].
Kim, Accuracy of Dental Replica Models Using Photopolymer Materials in Additive Manufacturing: In Vitro Three-Dimensional Evaluation, 2019 J.

Li 1, f 1The Key Lab of National and Local United Engineering for “High-Efficiency Cutting & Tools”, Harbin Univ. of Sci. and Tech，Harbin，150080，PR China a13936161878@139.com, bzhangruiliyuanbao@163.com, cyaonancheng@163.com, daiyamaya677@163.com, eanshuo0629@163.com Keywords: Flank milling, Trajectory planning, VERICUT simulation, Impeller blades, Titanium Abstract.
Based on the properties of titanium alloy material and the external characteristics of the impeller blades, proposed control method for machining distortion of impeller blades.
Based on external features of impeller blades and the nature of titanium material itself proposed processing deformation control method of impeller blades. 2.
Journal of Mechanical Engineering. 2005,41(11):pp.134~139

Influence of Axis Configuration in 5-Axis Control Machining Center on Geometric Error of Cubic Machined Surfaces Yuno Maeda1,a*, Shigehiko Sakamoto2,b , Hideharu Kato2,c , Ryuta Sato3,d and Yukitoshi Ihara4,e 1Graduate School of Engineering, Kanazawa Institute of Technology, 3-1 Yatsukaho, Hakusan, Ishikawa 924-0838, Japan 2Department of Mechanical Engineering, Kanazawa Institute of Technology, 3-1 Yatsukaho, Hakusan, Ishikawa 924-0838, Japan 3Graduate School of Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, Aichi 464-8603, Japan 4Department of Mechanical Engineering, Osaka Institute of Technology, 5-16-1 Omiya, Asahi-ku, Osaka 535-8585, Japan ac1052097@planet.kanazawa-it.ac.jp, bsak@neptune.kanazawa-it.ac.jp, chkato@neptune.kanazawa-it.ac.jp, dryuta.sato@mae.nagoya-u.ac.jp, eyukitoshi.ihara@oit.ac.jp Keywords: 5-Axis Machining Centers, Cubic-Machining, Structure Error, Form-Shaping-Theory, Mechanical Structure Abstract.
References [1] Yukitoshi Ihara: Accuracy Test Standard for Five-Axis Machining Centers, Journal of the Japan Society of Precision Engineering, 78, 7 (2012) 581-584
[2] Katsunori Ohta, Zhi Meng Li, Masaomi Tsutsumi: Proposal of a Machining Test of Five-Axis Machining Centers Using a Truncated Square Pyramid, Key Engineering Materials, 523-524, (2012) 475-480
[3] Soichi Ibaraki, Masahiro Sawada, Atsushi Matsubara, Tetsuya Matsushita: Machining tests to identify kinematic errors on five-axis machine tools, Precision Engineering, 34, 3 (2010) 387-398
Sato: Accuracy evaluation method on the five-axis machining centers by Square 3×3 machining, Proceedings of the 18th International Conference on Precision Engineering, (2020).

Promote Training of Computer Skills with The Talent Demand Peng Xufu College of Computer Science and Technology Hubei Normal University Hubei 435002 China pengxufu@163.com Key words: Computer skills, Social demands, Talent characters, Cultivation strategies Abstract.
This course is mainly taught in science and engineering lecturing.
Computer application foundation is set up according to professional requirements and social vocational, according to the demand of the different, now it set up microcomputer system, software engineering foundation, database, network application foundation, multimedia application base, etc.
The occupation of talent mainly reflects in adaptability between professional directions and job, make the best use of material and talent, conscientious and meticulous in work and responsibility.
The programming courses which aim at cultivating ability of thinking are required courses for science and engineering students.

The impact analysis of temperature on the line shape in cantilever construction Dongming Zhang1,2,a, Chen Zhao1,2,b, Yanbin Chi1,2,c 1Resource and Environment Sciences College 2Key Laboratory for the Exploitation of Southwestern Resources and Environmental Disaster Control Engineering, Ministry of Education, Chongqing University, Chongqing 400044 a15116258@qq.com, b352545721@qq.com, c540913081@qq.com Key words: Construction Monitoring, Temperature, Line Shape, Impact Analysis.
Engineering situation The Hechuan district is segmented into three areas which are called Heyang, Dongdu and Nanping by Jialing River and Fu River.
Because structure temperature of long-span bridge was a random variable which had close relation with the geographical position, natural conditions(such as atmospheric temperature), components material, etc, it was difficult to predict the practical structure temperature which could be predicted by the construction schedule and local climate.
[4] Wei Huang: Soil Engineering and Foundation.

Stress Calculation For a Double Layer Shaft In Special Strata Yang Zhou1, a, Guoqing Zhou2,b 1 State Key Laboratory for Geomechanics and Deep Underground Engineering , China University of Mining & Technology, Xuzhou, Jiangsu, 221008, China 2 School of Architecture & Civil Engineering, China University of Mining & Technology, Xuzhou, Jiangsu, 221008, China atod2006@126.com, bgqz@cumt.edu.cn Keywords: special strata; double layer shaft; elastic analysis Abstract：A stress calculation method has been established for the double layer shaft in special strata.
For the shaft material, the specific gravity is 0.024MN/m3; the elastic modulus is 30000MPa, and the possion’s ratio is 0.21.
From the engineering perspective, although the outer layer of the double layer shaft is in a bad safety state, the plastic interlayer can still proof the water when the outer layer ruptured, and the inner layer of the double layer shaft is in a good safety state, it can still bear the external loads at this time, therefore the application of this double layer shaft is advantageous for the safety production of the mine, and the outer layer of the shaft is the fragile part that needs to be repaired primarily, which is different from the single layer shaft.

Comparative Analysis of the Measurement Methods of Bound Water Content in Municipal Sewage Sludge Weijun Zhang 1, a , Kechun Sun1,b 1 the Department of Civil Engineering, Luoyang Institute of Science and Technology, Luoyang, China ajgzwj@126.com, bskchun@163.com Keywords: Bound Water Content, Sludge, Measurement Methods.
Φw=[(ρs-ρwh∞)/( ρsl-ρwh0)-1] ρw/ρs (1) ρs Sludge sample density; ρw The density of water; ρsl Sludge solids particle density; h0 samples initial height; h∞ The height of the samples balance; The key to this method is to determine h∞.
Centrifugal sedimentation method, at high rotating speed, has some limitations for a viscoelastic material, such as activated sludge.
(In Chinese) [5] Masakatsu, H., Sludge Treatment Engineering, (1990).
Journal of Chemical Engineering of Japan, (1992), 25(1): p. 100-103

Axial behavior of concrete-filled double skin steel tubular stub columns filled with demolished concrete lump Yanze Wang1 , Baishou Li 1,a,﹡ 1Structural engineering disciplines of Yanbian University in Yanji, Jilin ,133002,China absli@ybu.edu.cn; ﹡Corresponding author Keywords: thin-walled CFDST; demolished concrete; bearing capacity Abstract.
In the middle or a quarter of specimen local curve developed fast.They often play a key role to the destruction of the specimen.
DBJ13-51-2003 adopt a unified theory, the whole of the concrete-filled steel tube act as a a kind of new material, at the same time, considering the interaction of steel tube and concrete, calculation of axial pressure bearing capacity match the test results most.
Vol. 47(2009), p.669 [3] Zhao XL, Tong LW, Wang XY: Engineering Structures .
Vol.66(2010), p.542 [5] Wu B, Liu QX, Liu W, Xu Z:Earthquake Resistant Engineering and Retrofitting.

Virtual Design and Structural Optimization of Dry Twin Screw Vacuum Pump with a New Rotor Profile Shiwei Zhang1,a , Zhijun Zhang1,b and Chenghai Xu1,c 1 School of Mechanical Engineering & Automation, Northeastern University, Shenyang Liaoning, China, 110004 a shwzhang@mail.neu.edu.cn, bzhjzhang@mail.neu.edu.cn, cxch1940@126.com Keywords: Screw vacuum pump, Rotor profile, Solidworks, Structure optimization, Virtual design Abstract.
The application of the dry twin screw vacuum pump is not only in the high and new technology fields of space simulation, semiconductor processing, advanced scientific instruments, but also in the chemical, food, medicine, material, biology and many other industry areas requiring clean vacuum [2].
The design and manufacture of the screw rotor profile are the key technologies, which directly influence the working performance and manufacture cost of the screw pumps [3].
The whole virtual design processes of the screw vacuum pumps, including three-dimensional modeling, product assembling, motion simulation, interference checking and structural optimization, are completed by means of the Solidworks engineering software.
Virtual Deign and Structural Optimization Based on the above profile equations, the virtual design for the screw rotor and a twin screw vacuum pump with a pumping speed 100 m3/h is completed by means of the Solidworks engineering software.

Analysis of Automatic Welding Finned Tube Hydraulic System Based on Automation Studio Yue Hua Suna ,Hong Tao Li, Chun Sheng Liu Department of Mechanical Engineering, Heilongjiang Institute of Science and Technology, No.1, Tangchang Street, Songbei District, Harbin, 150027, China asunyuehualyb@163.com Keywords: Automation Studio.
Software description Automation Studio is a kind of software which have the function of design and dynamic simulation.It is to meet the needs of industrial automation built up, especially to complete engineering training and testing requirements. working unit of software reflects the current common usage in industry.The function of the Automation Studio simulation software which has become an effective automated simulation tool.
Host function Finned tube,which is a kind of resistance welding the fins (heat sink) on the isometric soldered together in new and efficient seamless heat exchanger, this exchanger endure high pressure, high thermal efficiency, compact and beautiful appearance.Finned tubes used in automatic welding machine automatic welding fins, and its action mainly by stepping on the material and pipe welding of two parts, one feeding the machine moves by step guide on the machine the size of the extension unit and push the slide(pull) acting hydraulic cylinder of the intermittent movement to achieve.Procedures by the hydraulic drive shown in Fig.1 [1,2].
Acknowledgements Science and Technology Research Project of Heilongjiang Province Office of Education (11533058); This project is one of the key projects for science and technology research of Ministry of Education(206045, YJSCX2005—190HLJ).
References [1] Xiaozhong Chen MECHANICAL ENGINEERING & AUTOMATION(In Chinese),2008(10),p.87 [2] Huanjun Zhao.