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Introduction Gold, silver, or pure titanium are the traditional materials used for the crown and bridge frames of dental restorations.
Due to the favourable transmission of light, the high abrasion resistance, the chemical resistance, the biocompatibility, and the pleasant contact feeling of the polished surfaces, the ceramic materials are perfectly suitable for dental restorations [1].
The bio-ceramic materials used for dental restorations can basically be divided into two categories, namely the aluminium oxide (Al2O3) and zirconium oxide (ZrO2).
Two types of tool materials, namely cubic boron nitride (CBN) and diamond were selected and studied.
Liu, A Finishing Model of Spherical Grinding Tools for Automated Surface Finishing Systems, The International Journal for Manufacturing Science & Production, Vol. 1 (1) (1997), p.17

However, driven by the economic benefit, increasing homebuyers ineligible to purchase EAH provide fake materials to acquire EAH, which makes EAH system deviate from its original aim.
After over ten years’ development, many problems surfaced in the EAH system such as ‘high sales and leasing rate’ of EAH, fraudulent purchase of EAH through providing fake materials etc.
Driven by the economic benefit, more and more ineligible applicants for the EAH use various powers and relations or provide fake materials to grab EAH and make huge profits, which causes the fraudulent purchase of EAH ceaseless and full of tricks.
The Ministry of Housing and Urban-Rural Construction (MHURC) announced “ Notice on related issues of strengthening the management of economically affordable housing ” and pointed out fraudulent homebuyers who provide fake materials must return the EAH immediately.
Journal of Public Management,2006,3(1):86-90 [7] Shaorong Sun, Yue Jiao and Chunxia Liu.

Acknowledgements The authors acknowledge the supports of staff of the department of statistics and mathematical sciences, Kwara State University.
Obalalu, Thermal Radiation and Convective Heating on Hydro magnetic Boundary Layer Flow of Nanofluid past a Permeable Stretching Surface, International Journal of Applied Mathematics & Statistical Sciences. (2019)
Turkyilmazoglu, Thermal radiation effects on the time-dependent MHD permeable flow having variable viscosity, International Journal of Thermal Sciences. 50 (2011) 88-96
El-Shaer, Radiative effects on magnetohydrodynamic natural convection flows saturated in porous media, Journal of Magnetism Magnetic Materials. 237 (2001) 327-341
Adebayo, Heat transfer in an unsteady vertical porous channel with injection/su ction in the presence of heat generation, Journal of Taibah University for Science. 14 (2020) 541-548

Study on treatment of dyeing wastewater by Fe0-H2O2 system Shanhong Lan1,a, Chuanlu Wang2,b, Jiahao Sun2,c, Heng Zhang2,3d 1College of Chemwastry and Environmental Engineering,Dongguan University of Technology, Dongguan, Guangdong; 2College of Chemical Engineering, Qingdao University of Science & Technology, Qingdao; 3Key lab of pulp and paper science & technology of minwastry of education, Jinan, shandong Province, China; alllssshhhh@126.com, b329101300@qq.com, c1836354@qq.com, dhgzhang@sina.com, Keywords: Printing and dyeing wastewater; Fe0-H2O2 system; advanced treatment; CODCr removal efficiency; Abstract.
Materials and methods The experimental water.
Acknowledgements This work was financially supported by the Industry-university-research Cooperation Project of Guangdong Minwastry of Education (2012B091100496), Dongguan Municipal Science and Technology Plan Project (2011108102005), Qingdao Municipal Science and Technology Plan Project (12-1-4-3-(28)-jch) and the Open Fund of Key Lab of Pulp and Paper Science&Technology of Minwastry of Education(08031337).
Chiou: Journal of Hazardous Materials.

Stranghoener, Fatigue strength of welded ultra high strength steels improved by high frequency hammer peening, Procedia Materials Science, 3 (2014) 71–76
Bracarense, Characterization of the mechanical properties and structural integrity of T-welded connections repaired by grinding and wet welding, Materials Science and Engineering A., 599 (2014) 105–115
Hernández, Combination of grinding and wet welding to repair localized cracking in T-welded connections, Materials Science Forum, (2014) 51–58
[15] ASTM, Standard practice for presentation of constant amplitude fatigue test results for metallic materials, (2018)
Ersoy, Recent trends and development of underwater welding, International Journal of Engineering Science and Application, 4 (2020)

They are used mainly to improve performance of final product like the workability, adhesion, tensile strength and many other properties of cement materials.
They combine several advantages compared to conventional materials like pure epoxy or self-leveling cementitious screeds.
TA01011034 „Development of the possibilities of the secondary raw materials usage as filler for the progressive multi-layer flooring and coating systems“ and project "SUPMAT - Promotion of further education of research workers from advanced building material center".
Polymers in cementitious materials.
Journal of Wuhan University of Technology-Mater.

The resulting material showed a high activity of degradation of methyl orange in the presence of H2O2 and UV light irradiation.
Many researches focused on the improvement and innovation of the POM anion embedding methods for the preparation of novel materials of LDHs.
Min: Chemical Journal of High School Vol. 16 (1995), p. 512 [7] T.J.
Pinnavaia: Microporous Materials Vol. 4 (1995), p. 21 [9] K.
Hu et al.: Microporous and Mesoporous Materials Vol. 56 (2002), p. 153.

The bearing capacity decreases continuously along with the deterioration of material property under the action of external effects.
It is one of the most important contemporary civil engineering materials.
Concrete is a multi-phase and composite materials consist of cement, aggregate and sand.
The principle of of analysis According to Lemaitre Theory[4], the strain of damage material owing to the stress is equal to the strain of undamaged material owing to the effective stress.
Journal of Hefei University of Technology,2005,28(3):308-310 [6] SL／T191-96，Design code for hydraulic concrete structures

It is also verified through the trial-cut with model material on a five-axis machine tool.
Fig. 10 (b) shows the multi-axis machining of model material.
Schmid: Manufacturing Processes for Engineering Materials, Pearson Education, New Jersey (2003)
Lee: ASME Transaction, Journal of manufacturing Science and Engineering Vol. 119 (1997), p. 393
She: International Journal of Advanced Manufacturing Technology Vol. 13 (1997), p. 658

In research area, calcite cementation predominantly formed during late diagenesis, In the acidic water for under the action of carbonate cementation, provides Ca2+, Mg2+ and HCO3- etc material base，Carbonate cementation content prong to accumulating at the top or bottom of neighboring mudstone and sandstone producing “calcite top” and “calcite bottom”.
Calcareous cement in the study area is presented mainly as intergranular cement, replacement mineral and filling material of secondary pore .
What’s more, clay matrix also transformed towards authigenetic kaolinite, which supplies Ca2+, Mg2+, HCO3- and other material basis for the formation of carbonate cementation and calcareous interbeds.
[3] Haifeng Zou, Fuhong Gao, Xuechun Xu, et.al: Journal of Jilin University(Earth Science Edition) Vol.32 (1):34-38
[4] Fanhao Gong, Zhidong Bao, Hancheng Ji, et.al: Journal of Jilin University(Earth Science Edition) vol.41(3):639-646.