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The material of workpiece is P20 steel mold (32 HRC).
National natural science foundation of mutual funds projects（U12012081） References [1] V Pateloup, E Duc, P Ray.
Effects of process parameters on material side flow during hard turning[J].
International Journal of Machine Tools & Manufacture,1999,39: 17–30
Chinese Journal of Aeronautics ,2009,22 (6): 677-684 [7] Douglas C, Montgomery.

After the 3D models are built, by the optimized process of material and mapping they can simulate the visual effects in real world.
Material is to create an optical effect on the surface so that the models can show different texture and colors when coloring on it.
The implementation of interactive virtual assembly system It is a complicated system engineering to implement interactive virtual assembly, which comes down to many science fields and key techniques.
[7] Liu C, Fu Y L, The design and implementation of virtual hand grasp behavior process in virtual assembly, Journal of Harbin Institute of Technology. 17. 4 (2010) 527-530
[9] Wang Q H, Li J R, Gong H Q, A CAD-linked virtual assembly environment, International Journal of Production Research. 44.3 (2006) 467-486

Degradation of Surface Modified β-TCP/PLLA Porous Scaffold in Vitro ZHANG Yun a, YIN Guangfu b, WANG Yuehua c, YANG Weizhong d, Kang Yunqinge College of Materials Science and Engineering, Sichuan University, 610064, PR China a email: scuzy@163.com, bemail: nic0700@scu.edu.cn,e yunqingkang@163.com Keywords: β-tricalcium phosphate, poly L lactic acid, composite scaffolds, degradation Abstract: Degradation of surface modified β-tricalcium phosphate (β-TCP) and poly L lactic acid (PLLA) composite scaffolds were investigated in vitro.
The simulated experiments in vitro prior to experiments in vivo can help purposefully design the material characteristics and improve material preparation process.
Materials and Methods Materials PLLA (η=7g/ml MW=6.17×10 5), β-TCP powders (the medium particle size d50=0.5−2µm) was self-prepared according to our previous publication [4].
References [1] Zhou DL, Yang WZ and Yin GF: J Mater Sci Tech, Vol.20 (3) (2004), p. 248 [2]Li Y, Zhang Y and Yin GF: J Functional Materials, Vol.36 (2). (2005), p. 298 [3] Li XX and Yan YH, Ceramic, 2(2003), p.27 [4] Zhang Y, Yin GF and Zhu SF: Current Applied physics, Vol.5 (2005), p.531
[6] Zhang L, Jin AM and Li J: Chinese Journal of Clinical Rehabilitation, Vol.20 (2002), p.3016.

Materials and Methods The materials used in this investigation are the following: · Isotactic polypropylene, iPP Marlex HGX -030SP; homopolymer was purchased from MARLEX Saudia Arabia.
Donnet, Elaboration and characterisation of new mesoporous materials from diatomite and charcoal, Microporous and Mesoporous Materials. 107 (2008) 219–226
Fazli, A study on the kinetics and thermal properties of polystyrene/diatomite nanocomposites prepared via in situ ATRP, Journal of Thermoplastic Composite Materials. 33 (2020) 180–197
Liang, Melt Rheology during Extrusion of Polypropylene Composites Filled with Diatomite Particles, Journal of Thermoplastic Composite Materials. 23 (2010) 265–276
Ponçot, Study of Na-Montmorillonite–Polyamide Fiber/Polypropylene Hybrid Composite Prepared by Reactive Melt Mixing, International Journal of Polymer Science. 2017 (2017) 1–12

It has focus a high degree of material civilization and become a compound social and economic ecosystem.
The outside walls of buildings made of high-tech materials are covered with lights or shiners, which boasts the dazzling night view.
In the recent phase from 1956 till now, a variety of new disciplines have been integrated into urban studies, such as management science, environmental science, biology, ecology, chemistry, physiology, information science, apply physics, hazards studies, and so on.
Introduction to Sciences of Human Settlements [M].
JOURNAL OF BEIJING CITY UNIVERSITY, 2007(5)

Influence of temperature upon the texture evolution and mechanical behaviour of Zircaloy-4 Peter Honniball1, a, Michael Preuss1,b João Quinta da Fonseca1,c 1Materials Science Centre, School of Materials, The University of Manchester, Manchester, M13 9PL, UK apeter.honniball@postgrad.manchester.ac.uk, bmichael.preuss@manchester.ac.uk, cjoao.fonseca@manchester.ac.uk Keywords: Zircaloy-4, deformation, twinning, CPFEM.
Gray, Influence of Temperature and Strain-Rate on Slip and Twinning Behavior of Zr, Metallurgical and Materials Transactions a-Physical Metallurgy and Materials Science, 26 (1995) 2665-2675
Withers, Evolution of intergranular stresses during in situ straining of IF steel with different grain sizes, Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing, 437 (2006) 26-32
Mahajan, Deformation Twinning, Progress in Materials Science, 39 (1995) 1-157
Misra, Quantitative analysis of deformation twinning in zirconium, International Journal of Plasticity, 25 (2009) 454-472.

The characteristics of materials used in the calculation are given in Table 1.
Stiffness is the ability to resist deformation of materials.
Thermal conductivity, λ, known as the coefficient of heat conductivity, is an important characteristics of the materials.
Acknowledgements This research is supported by the National Science and Technology Major Project of China (No. 2011ZX02702-003), the Chinese National Natural Science Foundation (50977056) and the Program of Science and Technology Commission of Shanghai Municipality (11DZ2290203).
Journal Of Functional Materials. 42(2011)1836-1839 [6] YANG Shi-min, TAO Wen-quan，Heat Transfer, forth ed, Higher Education Press, China,2006

The paper presents research of the possibility of using potassium carbonate and bicarbonate as inhibitors in the compositions of aqueous fire-extinguishing substances for the elimination of fires associated with the burning of solid and liquid combustible materials.
Modern science considers the process of burning hydrocarbons as a complex of chemical chain reactions.
Eastern-European Journal of Enterprise Technologies. 5(1 (119) (2022) 53–61
In Materials Science Forum. 1038 (2021) 514–523
Zhartovskyi, Use of polyhexamethyleneguanidine salts in compositions of aqueous fire-extinguishing agents for fire protection of objects made of cellulose-containing materials.

Tin bronze composite materials have the largest coefficient of friction to mohurs, with an average of 0.105.
Fig.6 shows the wear of titanium alloy substrates and different reinforced Teflon materials on moths.
Review of the biocompatibility of micro-arc oxidation coated titanium alloys, Materials & Design, 2015,Vol. 85(11):p640-652 [2] Qingbiao Li, Wenbin Yang, et.al.
International Journal of Refractory Metals and Hard Materials, 76(2018):p204-213 [5] Xiaojia Yang, Cuiwei Du, Hongxia Wan, et.al.
Applied Surface Science, 458(2018):p198-209

Introduction Titanium alloy materials with high specific strength, good corrosion resistance are widely used in industrial fields, but as the typical difficult-to-cut material it also has the characteristics of small thermal conductivity, high temperature, tool wear will adversely affect the surface quality [1-4].The change of chip morphology and surface quality is caused by the change of cutting environment caused by the tool wear [5].
The experimental materials are TC4, cutting tool is φ20mm ball-end milling cutter with indexable two teeth is made by DIJET company, uncoated.
Science China Technological Sciences. 54 (2011) 490-501
International Journal of Machine Tools & Manufacture 89 (2015) 110–123
Journal of Manufacturing Process. 14 (2012)257-268