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As early as the 1970s and 1980s, the United States, Switzerland and other countries have achieved 5-7 ingot electromagnetic casting while China started late. [1-2] From the end of the 20th century, in order to grasp multi-flow technology as soon as possible in aluminum foundry industry in China, a research program of dual-ingot electromagnetic casting was carried out by North China University of Technology, Beijing University of Science and Technology and other research universities.
For the material physical parameters, see Table 1.After meshing, the model can be applied in the current load and boundary conditions, that is, current density which is determined by current value, the coil turns and its sectional area, is loaded on induction coil; define the outermost air as the far-field unit and give far-field signs so as to describe far-field dissipation of electromagnetic field.
Regardless of current direction, the magnetic field density on the remote end should be greater than that on the proximal of the same Table 1 Parameters for the computation of electromagnetic field Materials Relative Permeability Resistivity (Ω·m) ingot 1.0 2.59×10-7 casting mould 1.0 1.07×10-7 coil 1.0 1.7×10-8 shield 1000 1.0×10-6 air 1 0 far-field air 1 0 ingot.
Journal of North China University of Technology.

Project portfolio Preliminary qualification Project analysis Appraisal and check Optimized portfolio Adjustment Knowledge bank Implementation Evaluation Project portfolio completion Enterprise strategy Proper method Figure 1 Project Portfolio Selection Process Project proposal preliminary qualification There are many kinds of project proposals, such as the construction tender from construction market, own projects in construction enterprise itself, maintenance and change of construction equipment and so on. 1) After identifying the project chances, the project proposer prepare material and record the details of the project like interest and cost and so forth; 2) According to the project preliminary template and standard made by the enterprise project portfolio management office, every proposal should be check carefully under the enterprise strategy and those disqualified projects will be rejected, which will help to save
With the help of operational science and following the selection standard and indicators, a group of optimized project portfolio will be selected.
International Journal of Project Management, 28(8), 818-831
Applied Mechanics and Materials,357, (2013), 2238-2241

During this process a great amount of chemical raw materials such as: pulp, caustic soda, sulfuric acid and CS2 are needed, thus leaving a lot of wastewater which will threaten the environment with various sulfuric acid, carbon disulfide, zinc sulfate, cellulose, dissolved organic matter and so on.
Air Blow Nutrient Salt Secondary Sedimentation Tank Recycling Sludge Sludge Inflow Fig.1 Bjectification and Biochemistry of Wastewater Process Flow Diagram The Upgrading Processing of Wastewater More manpower and material resources are required in the operation management due to the implementation of biochemical system in the traditional techniques mentioned above.
References [1] Quan Yuan,Bin Sun..Journal of Filtration&Separation,2005,15(1):31-33(In Chinese) [2] Wenyi Duane,Yu Bai,Yafeng Li.Coal Mine Environmental Protection,2001,15(5):46-48(In Chinese) [3] Liang Chen,Shaoning Lin,Runa Huang,Shanghai Enviromental Sciences,1994,13(8):15-18(In Chinese)

Finite Element Analysis for 40 MN Die Forging Press Wenbin He1,2,3,a, Pan Zeng1,2,b, Feng Lin1,2,c 1Department of Mechanical Engineering, Tsinghua University, Beijing, 100084, China 2Key Laboratory for Advanced Materials Processing Technology, Ministry of Education of China, Beijing, 100084, China 3Department of Electromechanical Science and Engineering, Zhengzhou University of Light Industry, Zhengzhou, Henan, 450002, China ahwb08@mails.tsinghua.edu.cn, bzengp@mail.tsinghua.edu.cn, clinfeng@mail.tsinghua.edu.cn Keywords: Die forging press, Finite element analysis, Bumpy-ridge, Main frame winding Abstract. 40 MN multi-cored die forging press is a bi-directional loading press machine designed by Tsinghua University.
The material of the main frame and other components is chosen as Q345, the Young’s modulus, Poisson’s ratio, and yield strength are 210 GPa, 0.3, and 345 MPa, respectively.
Sun: Journal of Mechanical Engineering, Vol. 48 (2012), p. 13 [2] W.

By considering the solid as a liquid with finite liquid fraction, the solid and liquid can be formulated as a one domain problem using the same governing equations, as follows[5]: (1) (2) (3) where is the density, the velocity vector, the pressure, the dynamic viscosity and is the thermal conductivity of the medium in the pipe, means the momentum sink in the mushy zone of the flow , and denotes the enthalpy of the material.
The enthalpy for the solidification problem can be described as: (4) where is the latent heat of the material, the reference enthalpy, means the liquid fraction.
The momentum sink due to the reduced porosity in the mushy zone are follows: (6) where is a small number to prevent division by zero, is the solid velocity due to the pulling of the solidified material out of the domain, and is the mushy zone constant.
Journal of Nuclear Science and Technology, 23(11), pp. 979-991, 1986

Materials with steeper slopes generally exhibit higher wear rates, while materials with shallower slopes indicate lower wear rates.
Materials for Biomedical Engineering Elsevier Inc., (2019) 273-308
Zafar, Wear behavior of various dental restorative materials, Materials Technology. 34 (2019) 25–31
Bouzidi, Recent Advances in Ceramic Materials for Dentistry, in Advanced Ceramic Materials, Ed.
Hashim, The Effect of Additives on Denture Base Resin Properties, Al-Nahrain Journal of Science. 20 (2017) 44–50

Application of Computer Integrated Process System in the Pulp and Paper Industry Zhongjun Xiao School of Electrical and Information Engineering, Shaanxi University of Science & Technology, Xi’an Shaanxi 710021, China xiaodongjun08@sina.com Keywords: Pulp and paper, Computer integrated process system (CIPS), Process control system(PCS), SIMATIC PCS7.
The whole pulp and papermaking process flow can be described as that the wheat straw, cotton stalks, bulrush and other papermaking materials are prepared through the dry and wet process, and are digested in the digestion section mixing with digestion liquors (black liquor and white liquor) under high temperature, and produce coarse pulps through the digestion reaction, and through washing and filtering, the black liquors, residues and coarse fibers could be removed from the coarse pulps which could be turned into accepted pulps, and the accepted pulps are sent to the whitening section and turned into paper pulps through CEH three-section continual whitening, and the pulps from the washing, filtering and whitening workshop mix with other pulps according to certain proportion, and mix with fillings, gluing materials, coloring matters and other accretions, the mixed pulps could be formed, and the mixed pulps are put into the pulp pool, and diluted as the paper pulp with regulated concentration
The keystone of ERP of the papermaking corporation is the logistic management, and the raw materials, finished product quality and quality traceability should fulfill very high management requirements, and the system should follow from the finished goods to semi finished articles and to material suppliers, so the ERP system must effectively help the corporation to follow the quality responsibility, and offer strong quality management and following function, and allow the corporation to follow the quality from the finished goods to raw materials.
Conclusions At present, many problems such as numerous corporate quantity, small scale, deficient raw materials, large resource and energy consumption, lower production efficiency and serious pollution still exist in Chinese pulp and papermaking industry, and the key reason is that the technologies (including the industrial technology and the equipment automatization technology) are lagged.
Journal of Northeastern University.

The special fillers, which can be metal, metal oxide or non-metal oxide materials, are added in the metal bond material.
Acknowledgment This project is supported by National Science Foundation of China (50705028, 51175166).
Shin: International Journal of Machine Tools & Manufacture, Vol. 42/7 (2002), p. 825–835 [8] H.W.
Yao: Advanced Materials Research, Vol. 135 (2010), p. 398-403 [9] B.H.
Fan: Advanced Materials Research, Vol. 325 (2011), p. 183-188 [10] Genichi Taguchi: Taguchi Method-Research and Development (ASI Press, Amercia 1992) [11] P.J.

China 2 School of Materials Science and Engineering, Xi'an Jiaotong University, No.28 Xianning West Road, Xi'an, Shaanxi Province 710049,P.
Introduction Copper and copper alloy is widely used as structural materials with the characteristic of high strength, good toughness, easy processing and strong corrosion resistance.
The material model of H62 is the Eq. 2 to Eq. 6 and material properties are shown in table 2.
The re-crystallization process is completed and the grains present the tiny acicular distribution at point 2 where the materials is flowed upward and the inverted extrusion is conducted from this position, the deformation is acutely and the temperature is high.
(4) The microstructure prediction of the extruded part is conducted utilizing the established material models.

Underwater Welding of Duplex Stainless Steel Jerzy Labanowskia, Dariusz Fydrych, Grzegorz Rogalski, Krzysztof Samson Gdańsk University of Technology, Faculty of Mechanical Engineering, Department of Materials and Welding Engineering, 11/12 Narutowicza, 80-233 Gdańsk, Poland a jlabanow@pg.gda.pl Keywords: duplex stainless steel, underwater welding Abstract.
Chemical compositions of used materials, wt % Material C Si Mn Cr Ni Mo UR45N+ 0.017 0.4 1.5 21.9 5.7 3.0 A5.9-06 0.02 0.46 1.6 23.0 8.6 3.1 Welding was performed on a small depth of 0.5 m, hence the influence of increased pressure on the welding process can be omitted.
In the base material of duplex steel average ferrite content was 47%.
Advances in Materials Science, Vol. 8, 3 (17), 2008, p. 11-22
Welding Journal, Vol. 88, February 2009, p. 21-28.