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Simulation of Flow Field and Temperature Tield in the Process of Filling and Solidification for K424 Alloy Thin-walled Casting Xin Wang 1,a, Zhijun Zhang 2,b 1Academy of Human Sports Science in Shenyang Physical Education Institute, Liaoning Shenyang, China,110102; 2Institute of Mechanical Engineering and Automation in Northeastern University, Liaoning Shenyang, China, 110004; ashin_wang@163.com, b working_zhang@163.com Key words: K424 alloy; thin-section casting; flow field simulation; temperature field simulation Abstract: In order to improve the utilization of K424 alloy, Z-Cast analysis software is used to get three-dimensional flow field and temperature coupling simulation in the process of K424 alloy castings filling, by considering the effection of pouring temperature, casting speed, shell thermal conductivity and temperature on the morphology of filling.
In the process of filling the mold, the molten metal stop flow when filling calculated to 53% ,and the time is0.718s;After the improvement of process program , the flowing front has arched shape only in the beginning moment of filling, then showed a steady advance form, and the temperature gradient is small, the total filling time is 0.863s.Can be seen from the figure of simulation results, the casting process has great impact on the flowing property of the alloy when the shell material is definite.

On Campus Communication - Take South China University of Technology for Example Ju Xue College of Civil Engineering and Architecture, China Three Gorges University, Yichang, Hubei, 443002, China zcxju@126.com Key words: campus space, significance of education, public open space, communication space.
The Significance of Communication Space on Education Campus not only functions as a place of studying, living and growing, but also plays an important role in spiritual level for students as a teaching material [3].

From the network point of view, as of September 30, 2010, in addition to the head office in Shenzhen, Ping An Bank has seven branches, the number of SDB’s outlets which were established through regulatory approval is 303, concentrated in three regions such as the Yangtze River Delta, Pearl River Delta and the Bohai Sea, once the acquisition is successful, Ping An Bank will save a lot of manpower and material resources, rapidly achieve a national network layout.
In the personnel area, it can absorb two key management skills, integrate a variety of research and developed department, achieve win-win goal.
Value Engineering, 2009, (09)

Introduction Sliding-trust bearing is one of the key structures of ship propulsion shafting system.
Fig.4 Effect of axial load on radiated sound power Fig.5 Effect of structural damping on radiated sound power The effect of structural damping on the noise radiation level of the bearing housing Increasing the damping ratio of the structural material is a simple and effective damping measure.
Harbin: Harbin Engineering University, 2008.

Error Analysis of Ladder Shaft Turning and the Research of NC Compensation Jian Li a, Yongchang Luo b and Xiaofan Nie c Dept of mechanical engineering, Guangxi University of Technology, Liuzhou, Guangxi, China agxlzlj@tom.com,blyc5689018@tom.com,cnxf19840419@foxmail.com Keywords: Ladder Shaft; Turning; Error Analysis; NC Compensation.
Preliminary design finishing, roughing depth of cut ap is 0.5mm and 3mm, the radial cutting force is calculated as follows: Fp——Radial cutting force; CFp——Coefficient of depends on the factor of workplace material and cutting condition ; xFp, yFp, nFp——Index of depth of cut , feed and cutting speed; KFp——Correction factor of the product; Under processing conditions, identify the factors and index value: CFp=1100,xFp=0.9,yFp=0.75,nFp=0,KFp=1 Calculation of the radial cutting forces with the change of knife back asp to change.
The spring in the shaft at both ends of the specific operation to add the following: In step two end shaft length were drawn four lines are 10mm, line for the end of a circular quadrant position endpoint key points, then add the spring element and spring element real constant, COMBIN14 by spring element 8 on the painting lines and merge model mesh nodes.

Research on Drive-part Control Strategy under the Influence of Environmental Temperature Xu-xiao Hu1,a ,Xin-rong Xu1,b ,Gang Chen1,c ,Han-tao Chen1,d 1Zhejiang Sci-Tech University,Hangzhou,310018 , China; 2 Zhejiang Sci-Tech University,Hangzhou,310018 , China; 3ZhejiangSci-TechUniversity,Hangzhou,310018 , China; 4Zhejiang Sci-Tech University,Hangzhou,310018，China; aemail: Huxuxiao@zju.edu.cn; bemail: 980058563@qq.com; cemail :465735896@qq.com Key words： Drive part；Environmental temperature ；Mathematic model；H-infinity controller Abstract： In order to reduce the influence of environmental temperature changes, the drive part mixed control strategy of PI and H-infinity based on output feedback is presented in this paper.
This text propose a modeling method in theory at the foundation of experiment, Compensation strategy research carried out for changes in ambient temperature on the basis of this model. 1．Mathematical model of nanoscale drive components Fig. 1 is a structural sketch map of drive part based on hot displacement of plasmodium, the material of the plasmodium is the steel No. 45, the size is 35 mm * 35 mm * 35mm.
Chinese Journal of Mechanical Engineering.2003: 79-83 [2] Li Yang, Li Shumin.Output Feedback H_∞ Control Based on LMI and Its Simulation[J].

Small oblique angle technique for principal-strain separation in luminescent photoelastic coating Shiqun Hua 1, a and Ying Luo 2,b 1 Faculty of Science, Jiangsu University, Zhenjiang, Jiangsu 212013, China 2 School of Civil Engineering and Mechanics, Jiangsu University, Zhenjiang, Jiangsu 212013, China ahsqhmxb@ujs.edu.cn, bluoying@ujs.edu.cn Key words: photoelastic coating, strain separation, luminescence coating Abstract.
The theoretical center principal strains, ε1=267.5 με and ε2=-447.6 με based on disk material elasticity modulus of 72.4 GPa and Poisson ratio of 0.33.

Inhibition Performance of Arachis Hypogaea Extracts on 316L Steel in HCl Solution Muyiwa Fajobi1,a and Roland Tolulope Loto1,b* 1Department of Mechanical Engineering, Covenant University, Ota, Ogun State, Nigeria a*muyiwa.fajobi@covenantuniversity.edu.ng, btolulope.loto@covenantuniversity.edu.ng Keywords: 316L steel; corrosion; H2SO4; HCl Abstract.
Most petrochemical industries prefer replacement of failed carbon steel equipment with another carbon steel material from time to time but this is not encouraging because of the cost implication.
Razali, Musa Sapientum (Banana) peels as green corrosion inhibitor for mild steel, Key Eng Mater. 797 (2019) 230-239

Zhang 3 1 Department of Precision and Micro-system Engineering, Delft University of Technology, Mekelweg 2, 2628 CD Delft, the Netherlands 2 Delft Institute of Microelectronics and Submicron Technology/HiTeC, Delft University of Technology, Mekelweg 4, 2628 CD Delft, the Netherlands. 3 Strategy and Business Development of NXP Semiconductors, Eindhoven, the Netherlands.
One key to miniaturization developed in the past was the use of unpackaged, bare dies.
However, the thin film differs from bulk material.

Xu 1 1 College of Mechanical Engineering, Taiyuan University of Technology Taiyuan, Shanxi, 030024, China a yanglv789@263.net, b zmandong@sohu.com, cyagang1@163.com Keywords: Electroplating, CBN, Planting CBN abrasives, Thermal diffusion Abstract.
CBN Planting Experiment Planting CBN abrasives is a key technology that can be classified as external and internal CBN abrasive planting methods.
CBN abrasives are plated chemically with material with magnetic conductivity (Such as nickel alloy) and then magnetized.