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Intorduction Multiferroic materials (coexistence of ferroelectricity, ferromagnetism, and ferroelastics) are the most attractive research objects due to the potential application at spintronic devices and novel storage media [1-4].
Our results suggest that phase boundaries in BFO-based materials are worthy of further pursuit to explore the enhanced multiferroic properties and possible multifunctional applications.
Acknowledgements We acknowledge the financial support from the National Science Foundation of China (NSFC) (51172110), the National Science Foundation of Jiangsu Province (BK2010525), the Science Foundation of Nanjing University of Posts and Telecommunications (NY208025, NY208026).
Scott, et al, Multiferroic and magnetoelectric materials, Nature. 442 (2006) 759-765
Holcomb, et al, Controlling magnetism with multiferroics, Materials Today. 10 [10] (2007) 16-23

Materials and Methods Tested chemical.
Journal of Agro-Environment Science in Chinese, Vol. 27 (2008), P. 407-413 [2] P.
Asian Journal of Ecotoxicology, Vol. 2 (2007), P. 243-251 [7] Q.X.
Journal of Agricultural and Food Chemistry, Vol. 38 (2002), 138-141
Soil Science Society of America Journal, Vol. 58 (1994), 1632-1638 [15] M.C.

Borek, Hot-rolling of advanced high-manganese C-Mn-Si-Al steels, Materials Science Forum 706/709 (2012) 2053-2058
Borek, Hot-Working Behaviour of Advanced High-Manganese C-Mn-Si-Al Steels, Materials Science Forum 654-656 (2010) 266-269
Chin, New trends in advanced high strength steel developments for automotive application, Materials Science Forum 638-642 (2010) 136-141
Mazanec, Properties of high manganese Fe-Mn-Al-C alloys, Archives of Materials Science 28 (1-4) (2007) 90-94
Padmanabhan, Tensile deformation-induced martensitic transformation in AISI 304LN austenitic stainless steel, Journal of Materials Science Letters 13 (1994) 389-392

The paper shows that due to the progress of science and technology, housing industrialization has led to the development of steel structure housing, and vice versa the development of steel structure housing has promoted the housing industrialization.
As a branch of buildings, steel structure housing is boned as steel beam and steel column from factory production, along with the new light, insulation, heat insulation and high strength of wall materials as retaining structure[2,3].
The wall material can be used in energy saving and environmental protection which attributes to green building and renewable recycling material.
The figure shows that under the factory production the garbage will be reduced by 83%, material loss reduced by 60%, recyclable materials accounting for more than 66%, saving energy more than 50%, error rate reduced to 0.01%, the exterior wall leakage rate less than 0.01%, precision bias less than 0.1% in mm.
[5] G.S.Wu,L.HUA,and J.XU,in:Application and development of light steel structure housing system,Journal of Shanghai Institute of Technology(Natural Science ), 04(2003)

Nanotechnology is helpful for utilizing water resources, energy conservation and raw materials.
This reduces the number of raw materials required for synthesis and promotes green technology.
Materials and Methods 2.1.
I. and Priyanka Jangid, “Applications of nanomaterials in wastewater treatment,” Materials Today: Proceedings journal, pp. 1–5, 2021
Gorjanc, “Novel green in situ synthesis of zno nanoparticles on cotton using pomegranate peel extract,” Materials, vol. 14, no. 16, 2021, doi: 10.3390/ma14164472

Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 233 (2019) 3487-3511
Journal of Mechanical Science and Technology 32 (2018) 5421-5432
Applied Mechanics and Materials 162 (2012) 403-412
International journal of mechanical sciences 43 (2001) 1711-1730
Journal of materials processing technology 155 (2004) 1383-1389

Advanced Materials, 21 (2009) 4565-4583
Materials Science and Engineering: B, 213 (2016) 12-40
Computational materials science, 82 (2014) 159-164
Computational Materials Science, 49 (2010) 450-456
Materials Today: Proceedings, 3 (2016) 1820-1827

Ma, Friction stir welding and processing, Materials science and engineering: R: reports 50, 1-2 (2005) 1-78
Journal of Materials Research 34, 1 (2019) 78-96
F. dos Santos, Keyhole closure using friction spot welding in aluminum alloy 6061–T6, Journal of Materials Processing Technology, 237 (2016) 12-18
In Trans Tech Publications, Materials Science Forum 765 (2013) 776-780
Strohaecker, The influence of refill FSSW parameters on the microstructure and shear strength of 5042 aluminium welds, Journal of materials processing technology 213, 6 (2013) 997-1005

As part of the functioning of this project, the scintillation properties of lead tungstate were revealed, thanks to the joint work of scientists in the field of materials science, technologists and physicists specializing in high energy physics.
Journal of Modern Physics A. 29(19) (2014) 144-149
IOP Conference Series: Materials Science and Engineering 905 (2020) 012008
Materials of the IV All-Russian Scientific Bergman Conference with International Participation.
IOP Conference Series: Materials Science and Engineering 905 (2020) 012009

It demonstrates that using the decoding algorithm can improve the utilization rate of materials and make programming efficient and easy.
The optimal circular-pipes packing can save material, speed up the production efficiency, improve the material utilization and cut the cost greatly.
For example, the genetic algorithm for one-dimensional packing, the automatic layout algorithm for two-dimensional irregular parts, and related research on circular-pipes packing, Although each condition has its own characteristic and has different constraints in packing process, the common goal is to achieve the most reasonable packing plan to make the materials waste the lest.
References [1] Zhixin Jia: Journal of Computer-Aided Design & Computer Graphics, 2004, 16(7), p. 890-895 (in Chinese)
[6] Yongfu Lei, Jinghai Gong: Sichuan Building Science, 2007, 33 (6), p. 237-239(in Chinese)