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UIDB/00481/2020 & UIDP/00481/2020) and CICECO Aveiro Institute of Materials (FCT Ref.
Xie, 4D Printing: History and Recent Progress, Chinese Journal of Polymer Science 36 (2018) 563–575. https://doi.org/10.1007/s10118-018-2089-8
Proust, Interrelations between Printing Patterns and Residual Stress in Fused Deposition Modelling for the 4D Printing of Acrylonitrile Butadiene Styrene and Wood–Plastic Composites, Journal of Manufacturing and Materials Processing 8 (2024). https://doi.org/10.3390/jmmp8020077
Norouzi, 4D printing self-morphing structures, Materials 12 (2019). https://doi.org/10.3390/ma12081353
Proust, Interrelations between Printing Patterns and Residual Stress in Fused Deposition Modelling for the 4D Printing of Acrylonitrile Butadiene Styrene and Wood–Plastic Composites, Journal of Manufacturing and Materials Processing 8 (2024). https://doi.org/10.3390/jmmp8020077

Electrodischarge machining (EDM) methods can only be used with conductive materials; however, upon addition of conductive components into the structure of ceramic materials, their discharge machining becomes possible.
These positive results suggest that acoustic monitoring of EDM and ceramic materials may provide some important information about the state of the EDM process, which may prove to be essential for control of more complex machining procedures of conductive ceramic materials.
Experimental Studies of the Vibroacoustic Process During Electrodischarge Machining of Ceramic Materials Two types of ceramic materials based on aluminum oxide were used in the experiment.
Conclusion The EDM process of conductive ceramic materials using a wire electrode is associated with multiple contacts of electrodes, which cannot be identified quickly enough by modern control systems due to the specifics of ceramic materials.
Journal of Friction and Wear. 35 No. 5 (2014) 389-395

Due to esthetics and ease of manipulation, acrylic resins are widely used as denture base materials.
In contrast to esthetic properties, these materials also present some disadvantages.
The mechanical properties of the acrylic resins used Material Young’s modulus [MPa] Tensile Strength [MPa] Elongation [%] Triplex 3048 65.67 4.97 Superacryl 5333 64.77 11.9 Although these materials have comparative tensile strength, the Triplex material has a much lower elongation capacity than Superacryl resin, this being one of the resons that these materials were used in the presented study.
Curently, the selection of dental materials is made particularly in terms of manufacturing technology and aesthetic criteria.
Journal of Dental Sciences, 2012; 7: 289-295; [2] Y.

Image color from red to blue indicates the material permittivity increasing, the red for the maximum permittivity, and blue for the minimum permittivity.
Acknowledgements This work was financially supported by the Science & Technology Research & Development Projects in Hebei Province (12212001) and Natural Science Foundation of China (61102096).
Zhu: Journal of Tianjin University, Vol. 36 (2003) No.3, p. 307 (In Chinese) [3] L.F.
Qi: Journal of Beijing Institute of Machinery Industry, Vol. 21 (2006) No.2, p. 28 (In Chinese) [6] Y.
Hua: The 6th International Conference on Measurement and Control of Granular Materials, (Tokyo, Japan, 2003), Vol. 1, p.309

Study on the Microstructures and Properties of the Lead-free Easy-cutting BiAl-brass Li Lei1,a , Chen Yuqi2,b, Li Qiang3,c and Huang Guojie4,d 1School of Materials Science and Engineering, Henan Poytechnic University, Jiaozuo, 454000, China 2State Key Laboratory for Fabrication and Processing of Nonferrous Metals, Beijing General Research Institute for Nonferrous Metals, Beijing 100088, China aleili8@gmail.com, bchyuqipy@163.com,cliqiang@hpu.edu.cn,dhuangguojie@grinm.com Keywords: lead-free brass, easy-cutting, hot-working property, machinability Abstract.
Acknowledgements The authors are grateful for support from Key Research Project of Henan, Science and Technology Department of China (No. 092102210368) and Natural Science Research Grant of Henan Education Department of China (No. 2008A460009) and Funds of Introduction of Talents of Henan Polytechnic University (No.
Ryan, F.B.Taylor: Journal of the American Water Works Association Vol.75 (1983), p.92
Yoshikawa: Journal of the Japan Research Institute for Advanced Copper-Base Material and Technologies Vol. 41, (2002) p.97

Introduction Tourism resource is the material basis and prerequisite of tourism industry whose survival and development rely on tourism resources, and geological landscape is a special kind of natural tourism resources.
After applied to tourism resources investigation, remote sensing technology can not only save manpower, material resources and financial resources, improve the speed and quality of investigation, but also can strengthen macro grasp of regional natural resources and understanding of its formation.
The number of researchers with background of computer science, information science, tourism management, mathematics is increasing besides the researchers with geological background.
Laura: Environmental Management Vol. 5 (2004), p. 748 [3] Tim Bahaire and Martin Elliott-White: Journal of Sustainable Tourism Vol. 2 (1992), p. 159 [4] P.W.
(In Chinese) [11] Yibin Zhang and Jiahui Qu: Remote Sensing Technology and Application, Vol.1 (1997), p.76 (In Chinese) [12] Baohua Huang, Fusheng Guo and Yongbiao Jiang: Journal of Mountain Science Vol.4 (2010), p.201 (In Chinese) [13] Yongbiao Jiang, Fusheng Guo and Zhonghua Hu: A Study on the Features of Danxia Landform and Its Landscape Types in Xinjiang Basin Vol.4 (2010), p.43 (In Chinese)

As the soil exists widely and has a certain degree of mechanical strength, it was used widely as building material, foundation and ambient medium in the engineering construction[1].
Materials and Methods Test Soil.
Acknowledgment The study was financially supported by the National Natural Science Foundation Project of P.R.
China (No. 51308256) and the Transportation Science and Technology Planning Project of Jilin Province in P.R.
Lu, Problems on the research of shear strength of clayey soils, China Civil Engineering Journal, 32(1999) 3-9

So along the river the shallow groundwater recharge the river. 2 Materials and Methods 24 groundwater samples were collected from different aquifers in June 2012 to determine the hydrogen and oxygen stable isotopes and carry out the water quality analysis.
When the organic materials and desulfurization microbial are coexist [20], the anaerobic degradation will be carry out: SO42-+2C+2H2O→H2S+2 HCO3-.
[5] Duan Yi, Wu Yingzhong, Zhao Yang, Cao Xixi, Carbon and Hydrogen Isotopic Compositional Features of Hydrocarbon Gases Generated by Different Coal-forming Materials, NATURAL GAS GEOSCIENCE.26(2015)2365-2371
[6] Duan Yi, Duan Mingchen, Wu Yingzhong, Yao Jingli, Luo Anxiang, Deng Xiuqin, Qi Yalin, Impact of Formation Environment of Coal-Forming Material on Hydrogen and Carbon Isotopic Compositions of Thermogenic Coalbed Gas: Thermal Simulation of Herbaceous Marsh Peats Formed under Different Climatic Environments, Earth Science.42(2017)1541-1548
[12] Zhao Fenghua, Cheng Chen, Fan Lijun, Guo Hong, Gu Shaoshun, Comparison of measuring methods of niteogen isotope composition in coals, Journal of Mining Science and Technology. 3(2018) 99-105

E-commerce includes a series of trade activities from the purchasing of raw material, the exhibiting of products, the ordering and storing of products and electronic paying and so on[5].
Journal of Intellectual Capital,vol.5, no.2, pp.326-336, 2004 [2]Armour, Georgina.
International Journal of Advanced Manufacturing Technology, vol.26, no.1, pp.169-182, 2005
Journal of Information Science,vol.27, no.3, pp.180-185, 2001
International Journal of General Systems,vol.32, no.3, pp.251-270, 2003

The surface and the block are forced to be an object, and then they are divided into several sub-domains with different material types.
Acknowledgements This work was supported by the Key Projects of National Natural Science Foundation of China (Grant NO. 40930635, 51179062).
Chinese Journal of Rock Mechanics and Engineering.
Chinese Journal of Geotechnical Engineering.
Chinese Journal of Geotechnical Engineering, Vol 33(7) (2011), p. 996-1006