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The twisted-tape was made by polymer materials with special process and can easily be put into and removed from tubes.
Numerical simulation of slit fin cell’s flow and heat transfer, Journal of Zhejiang University (Engineering Science), 2008, 42(8): 1462-1468
Experimental and simulation analysis of heat exchange and cooling, Journal of Jiangsu University of Science and Technology (Natural Science), 2008, 22(3): 43-48
Numerical simulation of uneven entry velocity distribution gas flowing across different arrayed tube bundles, Journal of Zhejiang University (Engineering Science), 2008, 42(8): 1462-1468
Journal of Scientific Computing, 1996: 1 -15.

China 2 Electronic and Information Engineering College, Henan University of Science and Technology, Luoyang 471003, P.
China 3 Vehicle and Motive Power Engineering College, He’nan University of Science and Technology, Luoyang 471003, P.
This work was partially supported by National Natural Science Foundation of China (Grant No. 60904023).
Darouach, Robust admissibility of uncertain switched singular systems, International Journal of Control, vol. 84, pp. 1587-1600, 2011
Ou, Stabilization for a class of discrete-time switched linear singular systems, International Conference on Materials Engineering for Advanced Technologies, Singapore, vol. 480-481, pp. 1406-1411, 2011.

Introduction Engineering ceramic materials have excellent characteristics such as high strength, high hardness, low density, low expansion coefficient and abrasion resistance, corrosion resistance, thermal and chemical stability, etc, and it has become a new engineering materials widely used in aviation, petrochemical, instrumentation, machinery manufacturing industry and other new fields.
Glass ZrO2 ceramic 45 Steel Fig.1 Edge comparison diagram As can be seen, contrary to the ideal boundary of metal burr，the edge of glass，engineering ceramics and other hard brittle materials are weak step edge, or sometimes have the material stripping defects.
The results showed that: 1) Contrary to the ideal boundary of metal burr，the edge of glass，engineering ceramics and other hard brittle materials are faint of the steps, or sometimes have the material stripping defects. 2) The performance of nano- ZrO2 ceramics grinding is superior, the marks are smooth and neat, the material surface presents brittle & plastic mixed mode of material removal, but the edge area exists many micro-breakout pit. 3) The grinding wheel's vertical cutting into and cutting out the grinding edge of engineering ceramics are weak step edge.
Jilin Science & Technology Press, China, 1997
Journal of Manufacturing Engineering, Vol.103 (1989) No.1, p. 51-57.

Das, Tribology of electroless nickel coating – A review, Materials and Design 32 (2011) 1760–1775
Singh, Electroless Ni–P and Ni–P–Al2O3 nanocomposite coatings and their corrosion and wear resistance, Journal of Materials Engineering and Performance, JMEPEG (2013) 22: 176–183
Paydar, Electroless deposition of Ni–P–B4C composite coating on AZ91D magnesium alloy and investigation on its wear and corrosion resistance, Materials and Design 31 (2010) 3095–3099
Vojtěch, Properties of Hard Ni–P–Al2O3 and Ni–P–SiC Coatings on Al-Based Casting Alloys, Materials and Manufacturing Processes, 24 (2009) 754–757
[12] Chen Suiyuan, Shi Ying, Fan Hong, Liang Jing, Liu Changsheng, Sun Kai, Synthesis of Ni-P-PTFE-nano-Al2O3 composite plating coating on 45 steel by electroless plating, Journal of composite materials 46(12) (2011) 1405-1416.

Materials and Method Acetic acid, ammonia, ferric chloride (FeCl3), and NaOH were purchased in pro analytical grade from Sigma Aldrich, and zinc acetate was purchased in pro analytical grade from Merck.
The crystal phase and morphology of the obtained materials were determined by X-ray diffraction (XRD; Rigaku SmartLab, Japan) and scanning electron microscopy (SEM; Jeol JIB-4610F, Japan).
This indicates the potential use of ZnO derived from waste materials for proper methylene blue degradation.
Bakar, “Current advancements on the fabrication, modification, and industrial application of zinc oxide as photocatalyst in the removal of organic and inorganic contaminants in aquatic systems,” Journal of Hazardous Materials, vol. 424, p. 127416, Feb. 2022, doi: 10.1016/j.jhazmat.2021.127416
Budiarso, et al., “Carbon nitride- and graphene-based materials for photocatalytic degradation of emerging water pollutant,” Materials Advances, vol. 5, p. 2668-2688, Feb. 2024, doi: 10.1039/D3MA01078C

Most of the solid materials have Acoustic emission when in plastic deformation and fracture.
But the acoustic emission signal strength of many materials is so weak that human can't hear directly.
In 1959, Spooner found that concrete materials such as before to unload and reload to historical maximum strain, basic silent emission signal, namely with the Kaiser effect.
Liu and M.X.Jin: Materials Review, Vol. 25(2014) No.
Yang: Journal of China & Foreign Highway, Vol. 1(2014) No.03. pp: 221-226.

China 3 College of Life Science, Henan University, Kaifeng, P.
Mushrooms have been used as food and food flavour materials in soups and sauces for centuries due to their unique and subtle flavour.
Materials and Methods Materials Fruit bodies of A.mellea and H.
Serotina 3.973±0.13 39.61 b A Extracted from aired-dried materials (10.0g).
Wang et al., “Study on chemical constitutes of fatty contents from Armillaria mellea (Vabelx Fr) Quel,” Journal of Henan University (Medical Science),” vol.25, no.3, pp.20- 23, 2006

In particular, the kaolin clay is used as a new raw material for synthesis of ordered mesoporous carbon (OMC) materials, which serve as electrode active materials for supercapacitors.
Sheng, Mesoporous Carbon Materials: Synthesis and Modification, Angew.
Antonietti, Hard Templates for Soft Materials: Creating Nanostructured Organic Materials, Chem.
Chao, Synthesis of SBA-15 using natural clay from low-grade potash ores of a salt lake in Qinghai, China, Proceedings of the 2015 2nd International Workshop on Materials Engineering and Computer Sciences, (2015)
Menon, Characterization of kaolin intercalates of oleochemicals derived from rubber seed (Hevea brasiliensis) and tea seed (Camelia sinensis) oils, Journal of King Saud University - Science, 25 (2013) 149-155

Acknowledgement This work was supported by national science and technology support plan of China (2011BAF15B02), Hebei provincial natural science fund project (E2012203108), colleges and universities in Hebei province science and technology research project (ZD2014034), open project of national engineering center (NECSR-201206), independent research project for youth scholars of Yanshan university (14LGA003).
References [1]Shimin XU, Dengyue SUN: Plate and Strip Production Technology and Equipment, Metallurgical Industry Press, Beijing, 2008,pp.28 [2] Zhimin ZHANG, Wei YU, Qingwu CAI: Transactions of Materials and Heat Treatment, Vol.34(3)(2013): 170-175 [3] Guo YUAN, Yi HAN, Chao WANG: Transactions of Materials and Heat Treatment, 31(12)(2010):148-152
[4] Guo YUAN, Guodong WANG, Lijun WANG: Journal of Northeastern University (Natural Science), 31(4)(2010): 527-538
[6] Fengli WAN, Mouwei LI, Shaojun ZHANG: Chinese Journal of Mechanical engineering, 39(5)(2003):111-115

Study on nitridation behavior of Mg-Ca alloy under Nitrogen Xiaoxia Yang1,a, Dunqiang Tan1,b, Dongfei Xiao1,c, Yijie Zhan1,d 1School of Materials Science and Engineering, Nanchang University,Nanchang 330031, China ayilan_2010@126.com,bcntdunqiang@yahoo.com.cn, cxiaodongfei898@tom.com,dzhanyijie666@126.com Keywords: Mg-Ca alloy; Spray deposition; Surface film; Nitridation behavior Abstract.
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