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The Thermal Stability of Bi-Pb-Sn-Cd Heat Transfer Fluid Xiao-min CHENG1,a, Jun MA1,b, Jian-yuan YE1,c and Xian-jie YANG2,d 1School of Materials Science and Engineering, Wuhan University of technology, China 2Guangdong five-star solar co., LTD achengxm@whut.edu.cn, bmjcy@whut.edu.cn, cyejianyuan@whut.edu.cn, dghyg8667777@126.com Keywords: Bi-Pb-Sn-Cd, low-melting-point alloy, heat transfer medium, thermal stability.
There has been systematic and extensive research on the alloy used for solar heat storage materials at home and abroad,and has made certain achievements [2-6].
Mei, Properties of cast aluminum alloys as thermal storage materials, Cast Met. 4 (1990) 203-206
Lu, Thermal stability and liquid corrosion of eutectic alloy Al-Mg-Zn as latent heat storage materials, Materials for Mechanical Engineering. 30 (2006), 11-18
Bi-Pb-Sn-Cd fusible alloy design and performance study, Development and Application of Materials. 20 (2005) 1-8

Introduction Fancy yarn refers to the process in spinning and manufacturing line, using special materials, special equipment, or special technology, processing of the fiber or yarn, and has a special structure and appearance effect of the yarn.
The results of fancy yarns application did not come up to expectations, but mathematically, there are finite supplies of basic raw materials in the country, theoretically, there are very limited resources to provide and guide enterprises and designers.
Thirdly, due to lack of professional designers, and knowledge of equipment, materials and technology and as well as not having compete grasp of the influence many style elements, performance and application have greatly limited the fancy sweater.
Experimental materials：3 materials in different proportion: #1dyed fancy yarn of shorter proportion and equal circulation (4~5cm); #2longer proportion and equal circulation (12~17cm); and #3 a combination of #1 and #2 plus non equidistant dyed fancy yarn (4~5:30~33cm), as shown in table 1.
[2] Shumei Jiang, in：the Unity of art and techniques of the fancy yarn in textile design,edited by Shanghai Wool & Jute Journal Vol.1(2004),in press

In addition, SF can induce close packing of materials, reduced bleeding and reduced pore size as well as generate more nucleation sites to accelerate hydration reactions because of its significant quantity of active silica and high specific surface area (typical size of 0.1-0.2 µm) [2].
Experimental Program Materials, Mixture Proportion, and Specimen Preparation.
The materials used for preparation of AC were sand, portland cement, SF, GGBFS, lime, gypsum, aluminum powder, and water.
Effect of fly ash and silica fume on the sorptivity of concrete, International Journal of Engineering Science and Technology, 2012, 4 (9), pp. 4238-4246
Journal of Materials Processing Technology, Vol. 209, No. 2, pp. 767-773.

By modeling the underlying mechanics, thermodynamics, or material science of the system, this approach provides an accurate and interpretable framework for predicting failures.
Monno, A review of prognostics and health management of machine tools, The International Journal of Advanced Manufacturing Technology, vol. 110, no. 5-6, pp. 1417-1438, 2020. https://doi.org/10.1007/s00170-020-05202-3 [4] M.
Kamaruddin, Preventive maintenance (PM) planning: a review, Journal of Quality in Maintenance Engineering, vol. 23, pp. 114-143, 2017
Zerhouni, Data-driven prognostic method based on Bayesian approaches for direct remaining useful life prediction, Journal of Intelligent Manufacturing, vol. 27, pp. 1037-1048, 2014
Schapire, A Decision-Theoretic Generalization of On-Line Learning and an Application to Boosting, Journal of Computer and System Sciences, 55 (1) (1997) 119–139.

The Long-Term Dynamics in Crude Oil Prices Baoming Qiao1, a, Si Zhang1,b and Hao Jin 1,2,c 1School of Science, Xi’an University of Science and Technology, Xi’an, Shaanxi, 710054, China 2Postdoctoral, Xi’an University of Science and Technology, Xi’an, Shaanxi, 710054, China aqiaobm@xust.edu.cn, bzhangsi_2004@126.com, cjinhao_2004@126.com Keywords: Crude oil prices, Skewness, Volatility, Jump-diffusion, Markov Chain Monte Carlo.
Almost all manufactured goods rely on oil at some stage in their production – whether for energy, transportation or raw materials.
Mandelbrot, New methods in statistical economics, Journal of Political Economy 61 (1963) 421–40
Chen, Empirical performance of alternative pricing models, Journal of Finance 52 (1997) 2003–49
Bengtsson, Jump spillover in international equity markets, Journal of Financial Econometrics 4 (2006) 167–03.

Experimental Materials.
Advances in colloid and interface science.
Surface Science Vol.552 (2004) L53–L57 [3] Milton J.
Journal of Dispersion Science and Technology, Vol. 30 (2009)p. 61-64 [5] Lijuan Han, Zhongbing ye, Hong Chen, et al.
Journal of Surfactants and Detergents, Vol. 12 (2009)p. 185-190 [6] Shanfa Tang, Hai Tian, Quan Yue, et al..Journal of Oil and Gas Technology, Vol. 30 (2008)p. 313-317 [7] Shanfa Tang, Quan Yue, Ruidong Wu, et al.

The application of Q690D for drilling equipment not only improve the strength grade of equipment materials, but also help to optimize the design of components and ensure service safety.
Test Methods and Materials According to ASTM A751-14a standard, ARL4460 direct-reading spectrometer and TC600 oxygen-nitrogen analyzer were used to detect the chemical composition of material.
The carbon content of material is low, and the welding crack sensitivity index of them is lower than 0.20, especially for Q690D2 and Q690D3 materials, which are in ultra-low carbon level.Q690D low alloy high strength steel improves the strength, toughness and service properties of steel materials by optimizing C content, adding a little Mn, Cr, Ni, Mo and microalloyed elements Nb, V, Ti.
Acknowledgements Science and Technology Research Projects of CNPC (No. 2019B-4014, 2018E-2101) and National Major Science and Technology Project (No. 2017ZX05009-003) sponsor this work.
Journal of iron and steel research. 2013, 2, 25(2): 48-53

Table 2 Comparison of different impermeable materials materials Polyethylene Teflon (PTFE) High-density polyethylene geomembrane（HDPE） Cost per m2(yuan) 7-12 18-24 15-22 characteristics Tarpaulins impermeable membrane is easy to decompose in the sun Heavy, inconvenient transportation The most common impermeable material.
high chemical stability , good chemical resistance to more than 80 kinds of strong acid and alkali materials ,such as asphalt, oil and tar , high and low temperature materials, acid , alkali , salt and other corrosive media.
Materials of HDPE impermeable membrane are non-toxic and environmental friendly .
（1）high-density polyethylene (HDPE) is initially identified as the main impermeable material.It has high cost-effective,high chemical stability , good chemical resistance to more than 80 kinds of strong acid and alkali materials ,and also has moderate cost.It is able to meet the requirements of the sewage seepage pits
Journal of Chongqing University of Science and Technology(Natural Sciences Edition，2012，14（2）:123-125

Technical Analysis Materials Selection.
The information about materials selection, materials performance, materials cost and application range was in shown Table 1.
Materials Desing strategy: Effects of H2S/CO2 Corrosion on Materials Selection.
Journal of Materials Science, (2013) 48: 3708
Offshore oil Equipment and Materials.

They are unclean raw materials, loose control of mixture proportion and unreasonable construction site management.
The two main problems about quality of raw materials were found as follows.
The effect of raw materials.SMA has high requirements on raw materials.
Strictly control the quality of raw materials.
Journal of China & Foreign Highway, Vol. 4 (2006), p. 54-57.