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We take raw materials, fuel and power purchase prices as substitution variable.
Journal of Hebei University of Economics and Business. 2010, 2:74-79
Regional Science and Urban Economics. 1996, 26:77-104
International Regional Science Review. 2003, 26:244-268
Journal of Econometrics. 2001, 105:59-83.

Due to multinational management and lack of material, there is less analysis of characteristics of the Heilong (Amur) Basin hydrology & water resources.
The river basin is divided into five areas according to the natural conditions and materials of control station, and adopts the control station method and the water balance method to calculate the surface water quantity.
Heilongjiang Water College Journal, 2005,32 (4) :104-106
Geographical Journal ,1999,54:1-10
Harbin: Heilongjiang Science and Technology Press, 1991.

In addition, a continuing need for the operation of a watercraft, the high level of materials consumption required for the design of a catcher, and the complexity of equipment affect the cost of produced gas.
Fixed pipelines with a closed end – heat conduit 3 to deliver a heat carrier, which is lined with heat-insulating material, and a gas pipeline to remove gas 4 are laid from coastland along the productive section of a bottom gas hydrate deposit.
Eastern-European Journal of Enterprise Technologies, 5(6 (89)), 48–55. doi:10.15587/1729-4061.2017.112313 [6] Saik, P.B. (2016).
International Journal of Engineering Research in Africa, (35), 77-88. doi:10.4028/www.scientific.net/JERA.35.77 [8] Shnyukov, Ye.F. & Ziborov, A.P. (2004).
Kiev: Department of Marine Geology and Sedimentary Ore-Formation under the National Academy of Sciences of Ukraine

Journal Citation (to be inserted by the publisher) Copyright by Trans Tech Publications The roles of specific residues on ERK2 for nuclear translocation in response to nerve growth factors in PC12 cells Seunghee Yoon 1, 3 , Rony Seger2, Eui-Ju Choi3 , and Young Sook Yoo 1,* 1 Bioanalysis and Biotransformation Research Center, Korea Institute of Science and Technology, P.O.
Box 131, Cheongryang, Seoul 130-650, Korea, seung0464@yahoo.co.kr 2 Department of Biological Regulation, Weizmann Institute of Science, Rehovot 76100, Israel, rony.seger@weizmann.ac.il 3 Graduate School of Biotechnology, Korea University, Seoul 136-701, Korea, ejchoi@korea.ac.kr 1,*Bioanalysis and Biotransformation Research Center, Korea Institute of Science and Technology, P.O.
Materials and Methods Materials: PC12 cells were obtained from the ATCC.
B, Cells lysates were prepared, as described under Materials and Methods section and analyzed with anti-diphosphorylated-ERK or anti-GFP antibodies.
Acknowledgments This work was supported by a grant from the International Cooperation Research Program (Grant number: 2U02840) and Systems Biology Research Program (Grant number: 2N26170) of the Ministry of Science and Technology.

Materials and Methods Research Objects.
Gulemova, Bioplastics as Replacement of Standard Polymer materials, in Materials and methods of innovative scientific and practical research and development.
Popov, Biodegradable Composite Polymer Materials, in Biotechnology: State and prospects of development materials of the IX international congress, Moscow, Russia, 2017, pp. 50-51
Willett, Mechanical Properties of LDPE/Granular Starch Composites, Journal of Applied Polymer Science. 54(11) (1994) 1685-1695. https://doi.org/10.1002/app.1994.070541112 [10] S.
Sokolov., Recycling and Recycling of Polymer Materials, Publishing house Tamb. gos. tech., Tambov, 2005

Use of materials with an adapted thermal expansion coefficient.
Due to the iron-nickel materials the alloys ideally have similar thermal expansion characteristics.
Furthermore the deformation characteristics, which are facilitated by the thermoplastic materials, are to be examined.
In addition the authors would like to thank the Auerhammer, Aue firm for providing the materials.
Nendel, CAPAAL and CAPET – new materials of high-strength, high-stiff hybrid laminates.

Materials and Methods Elemental copper powder (particle size: 200 microns), ternary Ti3AlC2 (particle size: 350 microns) and graphene (particle size: 5-10 microns) were used as the starting material and a compositional ratio of Cu-10 vol% Ti3AlC2-0.3 wt% Gr was taken.
Hardened Stainless steel discs (Material: EN-31 Steel with hardness of 60HRC) were used and the cylindrical samples were used as pins.
Archakov, Synthesis, structure and mechanical properties of bulk “copper-graphene” composites, Reviews on Advanced Materials Science, 57(2018), pp 151-157
[8] Jian Wang, Li-na Guo, Wan-ming Lin, Jin Chen, Shuai Zhang, Shao-da Chen, Tian-tian Zhen, Yu-yang Zhang, The effects of graphene content on the corrosion resistance, and electrical, thermal and mechanical properties of graphene/ copper composites, New Carbon Materials, (34)2019, pp161-169
[12] Huang Xiao Chen, Feng Yi, Qian Gang, Zhao Hao, Song Zhao Kun, Zhang Jing Cheng, Zhang Xue Bin, Arc corrosion behavior of Cu-Ti3AlC2 composites in air atmosphere, Science China Technological Sciences, 61(2018), pp551–557

The corresponding experiments were performed at the materials science synchrotron beamline EDDI [21] in the energy dispersive diffraction mode.
Starting point is the fundamental equation of XSA for quasi-isotropic materials in its depth-dependent form.
Diffraction Analysis of the Microstructure of Materials, Springer, Berlin, 2003, pp. 473 – 503
Science Forum 524-525 (2006), 37-42
Wagener, The materials science synchrotron beamline EDDI for energy-dispersive diffraction analysis, Nucl.

Introduction Recent development of construction materials has been focused on "eco-building materials".
In reality, this means the use of technologies with the lowest possible energy intensity, renewable raw materials, recycled and recyclable materials, the use of local resources and industrial waste materials.
Research teams keep looking for new ways of the utilization of these waste materials in various areas of construction materials.
When natural materials are completely and/or partially replaced with waste materials in the construction material segment, it brings savings for landfilling of these waste materials, protection of raw material resources and the environment and, ultimately, price decrease in comparison with the price of products based on natural raw materials.
Mec, Thermal insulation Alkali-Activated materials with lightweight aggregate, Advanced Materials Research vol. 897 (2014) 65-68

Research on Personalized Courseware Recommendation System of Rural Distance Learning Based on Combination Recommendation Technology Jianxin Guo 1,2,a, Jichun Zhao 1,2, b 1 Institute of Information on Science and Technology of Agriculture, Beijing Academy of agriculture and forestry Sciences, Beijing, China, 100097; 2 The Research Center of Beijing Engineering technology for Rural Remote Information Services, Beijing, China, 100097 aguojx@agri.ac.cn, bzhaojc@agri.ac.cn Keywords: Distance learning; personalized learning; combination recommendation; interest model Abstract.
Acknowledgements This work was financially supported by the 2012 ladder plan of Beijing Municipal Committee of Science and Technology ( No.
Journal of Software, 2002, 13(10): 1952-1960.
Research on Learning materials Personalized Recommendation based on combination recommended technology.
Journal of Shijiazhuang Institute of Railway Technology, 2008, 7(2): 43-48.