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Influence of Rotation Speed on Cooling Uniformity of Seamless Pipe for Quenching Guoyong Liu1, a, Dongmei Zhu1,b , Shaojun Zhang1,c , Shushan Hu2,d and Mouwei Li1,e 1 School of Mechanical Engineering, University of Science and Technology Beijing, No.30 Xueyuan Road, Haidian District, Beijing, China 100083 2 Department of Transportation, Ordos College of Inner Mongolia University, Inner Mongolia, China, 017000 3List all distinct addresses in the same way a gy_liu666@163.com, bzsdmm@163.com, csjzhang2004@yahoo.com.cn, d hushushan1@163.com, e limow@me.ustb.edu.cn Keywords: Seamless steel pipe, Quenching; Temperature field, Cooling uniformity, Numerical simulation.
In order to obtain accurate simulation results, the physical properties of material (29CrMo44V) with temperature changes are considered in the finite element method of the steel temperature.
JOURNAL OF TIANJIN UNIVERSITY OF TECHNOLOGY, Vol.22(2006) No.6, p.28.
Journal of University of Science and Technology Beijing, Vol.32 (2006) No.1, p.123.

However, comparing with explored extra-low and ultra-low permeability reservoirs, hydrocarbon accumulation mechanism of tight oil reservoir is more complicated, pore throat is more subtle, reservoir property is worse and interstitial material is greater[2], thus it’s more difficult to explore and develop them.
Journal of Xi'an Shiyou University (Natural Science Edition), 2007,02:96-99+178-179
Journal of Xi'an Shiyou University (Natural Science Edition), 2013,03:59-62+69+3.

For example, the event “delayed arrival of construction material” can cause a delay in execution.
Events can affect activities, material or work resources, lags, and calendars in project execution process.
Risk assessment and allocation in the UAE construction industry, International Journal of Project Management, 26 (2008) 431-438
Mulholland, J.C., Risk Assessment in Construction Schedules, Journal of Construction Engineering and Management, Vol. 125, No. 1, (1999) 8-15
An Uncertainty Importance Measure of Activities in PERT Networks, International Journal of Production Research, 1964 (12): p. 460-470

Materials and Methods The aim of this research is to develop a digital model that optimizes the selection of transport type for individual dimension stone blocks within a quarry, taking into account technical, economic, and environmental factors.
Foster, Real-time dispatching modelling for trucks with different capacities in open pit mines, Archives of Mining Sciences 57 (2012) 39–52
Journal of Surface Mining, Reclam. and Envir. 16 (2002) 59–76
Kyrylenko, Substantiation of the wheel loader employment at dimension stone quarries in Ukraine, Italian journal of eng. geology and envir. 2 (2017) 57–62
Makhno, Justification of transport operations in the conditions of a dimension stone quarry, Scientific and Technical Journal "Geoengineering" 5 (2021) 14–24

Freudenthal suggests that the Weibull distribution might be appropriate when the material parameter (here the fatigue life) is subject to poor quality control and the lognormal distribution might be appropriate when the material parameter is subject to good quality control [9].
Journal of applied physics.
International Journal of Fracture.Vol.14(1978), p.327
Extreme values and related models with applications in engineering and science.
Journal of Structural Division, ASCE.

Today, materials with high thermal hardness, high tensile strength, and sufficient thermal conductivity such as powder metallurgy (PM) high-speed steels are more frequently used.
These developments pose challenges to fine machining operations and require further investigation of the process and the cutting materials [2].
DeVor: Mechanistic model for the reaming process with emphasis on process faults, International Journal of Machine Tools and Manufacture, 46 (2006), 836-846
DeVor: The effects of process faults and misalignment on the cutting force system and hole quality in reaming, International Journal of Machine Tools and Manufacture, 46 (2006), 1281-1290
In Journal of Manufacturing Science and Engineering 123 (2001), 387

Table.1 The stratum sequence and characteristics in Jiwa area geological time mapping units code Main lithology and ore characteristics Ge Sy Ce Gr Fm Mem Cenozoic Quaternary Holocene Qhf swamps deposits: silt and clay Qhesl slope sediments: gravel, silt and clay Qhal alluvial materials: sand, gravel and clay Late Pleistocene Qp3pal fluvial and alluvial materials: sand, gravel , clay and clay layer Middle Pleistocene Qp2gl glacial drift: sand, gravel , clay Neogene Pliocene Epoch Wuyu Gr upper E2WY gray mid-thick multelements calc-conglomerate, gray mid-thick sandstone, feldspathic sandstones, blue-gray medium mud-siltstone lower thick grey–fuchsia conglomerate, fine-feldspars quartz sandstone, thick brick red, thick sandy and muddy stone, with acidic volcano Lava Paleogene Oligocene E3r upper E3r grey-red medium grained feldspars quartz sandstone, thin feldspars quartz sandstone and grey-green muddy siltstone, medium grained sandstone with muddy-conglomerate, siltstone,
Based on all the data, made a summary of geological characteristics which including regional geological fault conditions, ore type, mineral formation, material composition, different element associations, wall rock alteration characteristics, e.g.
Geological Science and Technology Information, Vol.21, (2002)., p. 55-61 (In Chinese) [3] Jianya Yuan, Shenghua Cao, Xiaochuan Luo g, etc.
Journal of DongHua Polytechnic, (2006), p. 177-181(In Chinese) [11] Xinwei Hu, Runze Ma, Xiaofeng Tao, etc.
JOURNAL OF CHENDU UNIVERSITY OF TECHNOLOGY (Science &Technology Edition), Vol. 34 (2007), p.15-22 (In Chinese) [12] Yuanyi Zhao, Liang Song, Xingtao Fan, etc.

(https://www.sciencedirect.com/science/article/pii/S1755008423000030) [2] The World Bank.
International Journal of Green Energy 13, 352-365
Evolution of microgrids with converter-interfaced generations: Challenges and opportunities, International Journal of Electrical Power & Energy Systems, 109: 160-186, https://www.sciencedirect.com/science/article/pii/S0142061518332745,[11] Shahgholian G. (2021) A brief review on microgrids: Operation, applications, modeling, and control.
Energy and material recovery potential from municipal solid wastes (MSW) in Nigeria: Challenges and opportunities.
International Journal of Energy and Environmental Engineering. 3:7 http://www.joiurnal.ijeee.com/content/3/1/7 [21] Olabi A.

Introduction Zinc oxide (ZnO) is an important industry material and applied in plastic, rubber, sensor and the luminescent display device, etc.
ZnO materials prepared by the different methods have the different generated mechanism and the different final product performance.
Zinc acetate (Zn(CH3COO)2·2H2O, Shanghai qingxi), methanol (CH3OH, Shanghai No.1 Reagent Factory), aluminum nitrate 9-hydrate (Al(NO3)3·9H2O, Tianjin Fengchuan Chemical Reagent), ethanol (CH3CH2OH, AR, Shanghai jiuyi), indium chloride (InCl3, Aladdin Reagent) were used as starting materials.
Acknowledgments These researches have been supported by the National Natural Science Foundation of China (No. 61066003), the Natural Science Foundation of Jiangxi Province, China (No. 2009GZW0013, 2010GQW0039), the JiangXi Province Key Technology R&D Program, China (No. 2010BGA01100), and the Education Bureau of Jiangxi Province, China (No.
Chen: Journal of Physical Chemistry C Vol. 111 (2007) p.13398-13403 [10] J.

As a matter of fact, it also has many harmful characters as fuel oil based on many studies on different pyrolysis materials, including unpleasant odor, high water content, complex constituents and chemical instability, and so on.
Materials and methods Characters of sewage sludge The non-digested sludge after mechanical dewatering was collected at a wastewater treatment plant in Tangshan, Hebei Province, China.
The organic composition of pyrolysis oil can not be obtained with GC-MS for a mount of solid particles and other materials harmful to GC column.
Ma..Journal of Environmental Sciences-China, Vol. 18 (2006), p. 1094 [2] J.
Progress in Energy and Combustion Science, Vol. 25 (1999), p. 55 [3] W.