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Research on the Differences of the Pore Characteristics with Different Destroyed-Type Coals Ling ling Qi1,a, Zhao feng Wang2,b, Hong min Yang3,c 1,2,3School of Safety Science and Engineering, Henan Polytechnic University, Jiaozuo 454003, China; 1,2,3Key Laboratory of Gas Geology and Gas Control of Henan Province——State Key Laboratory Breeding Base with province-ministry co-constuct, Jiaozuo 454003, China aqll5407@163.com, bwzf3988@163.com, cyhmfs@163.com Key words: coal, pores, destroyed-type, coal and gas outburst Abstract: In order to investigate the pore characteristics of the different destroyed-types of coals and its effects of coal and gas outburst, this article studyed the low temperature nitrogen adsorption curve, specific surface area, pore volume and its distribution with the method of low-temperature nitrogen adsorption, also studed their changes with the different destroyed-type of coals, and the influences of pore shape and distribution for coal and gas outburst
With the increasing of destroyed-degree, the porosity increased, the anti-destruction capability reduced, the coal is more easily broken, then the risk of outburst is greater. 1 Introduction Coal is a solid material with abundant pores, and its pore structure characteristics are connected with occurrence state of the pore.
Journal of China Coal Society, 1987,12 (4) :51-57
Combustion Science and Technology, 2007, 13 (3):265-268

Numerical Calculation on Contact Stress Start Input force, structure parameters, material parameters and iterative precision Calculate coefficients C and D For i=0, e (0) =0, f (0) (e) =C/D, The search interval [0, 1.1] i=i+1, use the iterative method to calculate e (i+1) and f (i+1) (e) N Output e; call the program to calculate contact stress.
Cui: Design of Traction-planetary CVT (Henan science and Technology Press, Zhengzhou 1994).
Gao: Heavy Industry Science and Technology (1) (2006), p. 12.
Su: Journal of Shenyang Institule of Aeronautical Engineering (3) (2009), p. 5.

Material and methods Sample origin.
Acknowledgements This work was supported by the National Natural Science Foundation of China (No. 51104189), the 53rd China Postdoctoral Science Foundation (No. 2013M531814), and the National Basic Research Program of China (No. 2010CB630901).
DNA extraction conditions from Porphyra perforate using LiCl.Journal of Applied Phycology 7:101-107

Test Equipment Vibratory roller compaction effects basically come down to: (1) exerting impact force on the materials; (2) reducing internal friction of granules; (3) making the compaction materials easy to move by vibration.
Vibration compaction parameter selection: vibration frequency 35Hz, vibration amplitude 0.8mm, vibration time 7min, packing method : using three-layer filling materials, weight block weighs 25kg, pressure acting on the sample 13.8kPa.
While using vibration compaction method to compact the subgrade, it is necessary to control the water content of subgrade filling materials, to make sure that the water content within ± 2% of the best water content.
,Ltd and Qinghai Institute of Transportation Science.
(in Chinese) [9] Zhinong Li, and Chuangnig Jin: submitted to China Journal of Highway and Transport (2007).

Introduction Over more than half a century, diffusion studies in solids using radioactive tracers [1] have played an important role in understanding the underlying mechanism of atomic transport in solids, which is of great importance in a number of branches of materials science and engineering.
Fast Li diffusion is desirable in battery materials, i.e.
Li ionic conductors for materials of electrodes and solid electrolyte, which are under development for improving the present capability of the secondary Li ion batteries.
Experimental Materials.
Iwase: Journal of Phase Equilibria and Diffusion, Vol. 26 (2005), p. 472 [8] M.

Biomaterials are categorized into four main classes: metals and their alloys, polymers, ceramics, and natural materials [2].
Materials and Methods 2.1 Powder preparation: Fish scale (Fs) from Tilapia Oreochromis niloticus was used for this work.
Effect of strontium doping on the biocompatibility of calcium phosphate-coated titanium substrates, Journal of Applied Biomaterials & Functional Materials. (2019) 1-10.
Radical-functionalized plasma polymers: Stable biomimetic interfaces for bone implant applications, Applied Materials Today. 16 (2019) 456–473
Microstructures, hardness and bioactivity of hydroxyapatite coatings deposited by direct laser melting process, Materials Science and Engineering C. 43 (2014) 189–198.

There is a lack of information on the magnetic properties of particles of such materials as powder magnetic (modified by inclusions of magnetite and maghemite) carbon sorbents intended for water purification from various kinds of impurities and, what is especially important, allowing to perform the prompt isolation of the spent sorbent – by magnetic separation.
These data, as a rule, reflect the magnetic properties not of the particles of these components themselves, but of special samples of their material.
Acknowledgements This research was supported by the Ministry of Science and Higher Education of the Russian Federation (project 0706-2020-0024) using equipment of Core facilities centre “MEMS and electronic components” of MIET.
Ershova, Magnetic Iron-Containing Carbon Materials as Sorbents for the Removal of Pollutants from Aquatic Media (A Review), Solid Fuel Chemistry. 55 (5) (2021) 285–305
Yashin, Accounting for the influence of granule size distribution in nanocomposites, Russian Technological Journal. №2 (2020), 59-66.

One of the most important issues is the selection of materials for well casings and piping to handle brines, steams, and brine/steams mixtures.
The chemical composition and characteristics of geothermal fluids have great influence on the degradation process of the used materials.
In geothermal plants carbon steel and martensitic stainless steel are normally used for pipelines and turbine materials.
Both materials suffer from corrosion damage in the presence of condensed steam at low pH values.
Two different materials were studied: ASTM A-53 grade B, which is normally used for surface pipeline, and API-L80 carbon steel, which is used for casing pipe.

The 18 batch of Bupleurum scorzoneri folium Willd. from 5 different area(Jilin(J), Sichuan(S), Hubei(HU), Guangxi(GX) and Anhui(A) Province, China) were purchased by the local medical material company, and authenticated by Dr Hongyan Ma, Guangdong Pharmaceutical University.
Table 1 Compounds large differences in different areas of BSFW RT (min) Formula Identification Compound type 2.57 C22H22O12 Cacticin flavone 4.26 C21H20O11 Quercitrin flavone 9.20 C42H68O13 Saikosaponin a/b/d saponin 9.64 C45 H70 O16 Malonylsaikosaponin a/d saponin Acknowledgement It is a project supported by Guangdong Natural Science Foundation (No: 10451022401004962).
[6] Information on http://rcom.univie.ac.at/  [7] Hui Zou, Trevor Hastiey, Robert Tibshirani: Journal of Computational and Graphical Statistics Vol. 15 (2004), p. 1.

Sari 2, c 1Islamic Azad University, West Tehran branch, Tehran, Iran 2Plasma Physics Center, Science and Research Campus, Islamic Azad University, Tehran, Iran aramezani_a_h@yahoo.com, bhanteh2001@yahoo.com, c sari@srb.iau.ac.ir Key words: Ion Implantation, Resistivity, Conductivity, AFM Abstract.
It is not material to this simple model whether the donor or acceptor levels are close to the conduction band edge.
Journal, Oct., (2000), p.103