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Online since: January 2012
Authors: Yi He, Xiao Mei Dong, Chen Hui Zheng
Study on Concrete's Temperature Control Measures for Inverted-Siphons in Wenxian-Boai.section Yi He1, Xiao-mei Dong1, Chen-hui ZHENG2 1Luoyang institute of science & technology , Luoyang.China 2The 4th Engineering Co Ltd.
Through establishing models with the thermal and mechanical properties and taking the calculation method in simulating the non-steady temperature field and stress field of limited units, detailed numerical simulation method is carried out to calculate the construction process of concrete, environmental conditions, surface heating methods, concrete material changes and some other factors.
Concrete is a kind of hot material, shortly after pouring, the temperature of the concrete would rise under the reaction of the cement hydration.
With the advent of cold weather, the tensile stress of the 3 # feature points changes slightly, but it would not exceed the immediate tensile strength. 6 Conclusion a, According to the simulation results, the use of foam insulation board posted outside the template and multi-deck insulation materials with a reasonable construction process, the engineers will be able to reduce the possibility of cracking of the construction in spring and autumn.
Journal of Hehai University, 2002, 30(5): 12-16(in Chinese)
Online since: July 2014
Authors: Sen Liu, Jun Ming Zhao, Mao Dong Li, Bo Yang, Ying Tong Chen, Si Xue Guo, Zhi Ping Zhu
Diagnostic analysis of boiler make-up water treatment system in Taishan power plant Junming Zhao1,a, Sen Liu2,b,Maodong Li1,c,Bo Yang1,d,Yingtong Chen1,e, Sixue Guo1,f, Zhiping Zhu2,g 1Guangzhou Special Pressure Equipment Inspection and Research Institute, China Guangdong 2Changsha University of Science & Technology, China Changsha aemail:broodzjm@126.com,bemail:282000517@qq.com,cemail:md92791@21cn.com, demail:272818102@qq.com,eemail:332034523@qq.com,femail:71456341@qq.com, gemail:13808475420@163.com Keywords: Boiler make-up water; Pretreatment system; Desalination system; Corrosion Abstract.
The technical parameters: ①capacity: 200t/h; ②filter speed: 8.14m/h. ③backwashing intensity: 10 L/s.m2; ④the backwashing air consumption: 0.6-1.2 m3 / m2·min (air scrubbing intensity: 10-20 L/s.m2); ⑤head loss: the early 0.3 m, the final is not more than 1.5 ~ 2.0 m; ⑥The suspended solids content of effluent: ≤1 mg/L; ⑦porcelain sand for filter material: 0.5 ~ 1.2 mm, the bottom are big size pebbles, the upper is double filter material; ⑧equipment weight (including the filter material) : about 81 t; weight of equipment operation: about 287 t[1].
Problems and analysis of pretreatment system.①Make-up water is clear and stable, it is not mixed with flocculants and coagulant except sodium hypochlorite solution to sterilize, it does not have the problems of alum flowers floating and gathering occurred in inclined tube sedimentation tank and it also does not need to adjust the dosage of coagulate regularly when the seasons change. ②Air scrubbing gravity filter runs as the mode of being backflushed periodical, generally speaking, it is backwashed once a week and 200 tons of water is consumed each time, the filter doesn’t need air scrubbing for the reason that the differential pressure of filter material in backwashing doesn’t meet the design value. ③The pretreatment process can save medicine and water, which is operated economically and easy to be maintained .
Screening of advanced produced water treatment technologies: overview and testing results[J].IDA Journal of Desalination and Water Reuse, 2013, 5(2): 75-82
Online since: August 2014
Authors: Hui Yu Huang, Yang Hong
Table 1 Blunt standard of carbide tools Workpiece Material Processing Properties Blunt Standard Carbon Steel, Alloy Steel Rough turning Precision turning 1.0-1.4 0.4-0.6 Grey Cast Iron, Malleable Cast Iron Rough turning Semi finish turning 0.8-1.0 0.6-0.8 Heat Resistant Steel, Stainless Steel Rough turning, Precision turning 1.0 In this experiment, we choose 45 steel rods as cutting workpiece, processing method for semi finish machining, tool for YT14 cemented carbide cutting tool.
Turning Lathe: CA-6140 Workpiece Material: 45 Steel Rods (Size: φ90*500mm, Hardness: HB200 ) Tool Blade: YT14 indexable carbide insert Sensor: Piezoelectric acoustic emission sensor Amplifier: PxPA31 Amplifier (Magnification: 100 times) CCD: Measurement Precision can reach 0.01mm Experimental scheme.
Jackson, etal: Materials Evaluation, Vol. 53(1995) NO. 2, p. 1052-1058
Arrazola: CIRP Journal of Manufacturing Science and Technology Vol. 1 (2008), p. 97–102
Online since: August 2009
Authors: Ying Xiang Liu, Jun Kao Liu, Wei Shan Chen, Sheng Jun Shi
Duralumin alloy (ρ=2810 kg/m3, E=7.2×1010 N/m2, σ=0.33) is the selected material of horn.
Steel (ρ=7800 kg/m3, E=2.06×1011 N/m2, σ=0.3) is the selected material of rear cap and flange bolt.
The PZT ceramics material is PZT-41.
Acknowledgements This project is supported by the National Natural Science Foundation of China (No. 50875057).
Zhao: Journal of Vibration, Measurement & Diagnosis Vol. 24 (2004), p. 1-5 (in Chinese) [3] LI Hua-feng, GU Cheng-lin: Proceedings of the CSEE Vol. 22 (2002), p. 67-70 [4] T.
Online since: February 2011
Authors: Nu Wen Xu, Chu Nan Tang, Chun Sha, Ru Lin Zhang
Rock or rockmass is an obvious heterogeneity material and how to characterize the feature is of significance for the engineering.
In RFPA2D code, m is defined as the homogeneity index of the material.
A larger value of m implies a more heterogeneous material and vice versa.
Acknowledgements Financial supports from the National Natural Science Foundation of China (Grant Nos. 10672028, 50820125405, and 40638040) and National Basic Research Program of China (973 Program, Grant No. 2007CB209400) are greatly appreciated.
Mech.Eng Vol. 29-5(2010), p. 915–925(in Chinese) [5] J.M.Duncan: Journal of Geotech.
Online since: January 2005
Authors: Wan Qi Jie, Guang Yu Yang, Qi Tang Hao
Polmear: Materials Science and Technology Vol. 10 No. 1 (1994), p. 1~16
[3] XIAO Xiao-ling, LUO Chengping, LIU Jiangwen, et al: The Chinese Journal of Nonferrous Metals Vol.13 No.1 (2003), p.15-20
[6] Makar G L, Kruger J: International Materials Reviews, Vol. 38 No.3 (1993), p. 138~153
Online since: July 2004
Authors: L.M. Socolovsky, O.E. Agüero, I.L. Torriani
Journal Citation (to be inserted by the publisher) Copyright by Trans Tech Publications Crystallite size and strain study of a nanostructured Fe-Cu alloy from diffraction profile analysis O.
X-ray diffraction peak profile analysis is a powerful tool for the characterization of microstructures in crystalline materials.
Diffraction peaks broaden when crystallites are small or the material contains lattice defects.
The blend was loaded under Ar atmosphere into stainless steel vials previously coated with the material to be ground.
Acknowledgements Support from brazilian agencies CNPq and FAPESP, and Energy Science and Engineering Laboratory (Kyoto University) is acknowledged.
Online since: October 2011
Authors: Marcelo Henrique Prado da Silva, Luis Henrique Leme Louro, Felipe Nobre Moura, Luciano Andrade Gobbo
Therefore, controlled Zn release by an implant material can promote bone formation around the implant and accelerate recovery of the patient [7].
Material and Methods The method consists of coating pure niobium and titanium plates in an aqueous solution rich in (PO43-) and calcium (Ca2+) ions.
Journal of Inorganic Biochemistry 1995;58:49-58
Materials Science and Engineering C 2007; 27: 394-401
Online since: March 2014
Authors: Irza Sukmana, Siti Amirah Ishak
The development of biomaterial science and tissue engineering fields open a great demand for the replacement of damaged tissue and organ in this growing population [2].
Materials and Methods Chemicals and fibrin gel preparation.
Pozzo, Fibrin Clot Structure and Mechanics Associated with Specific Oxidation of Methionine Residues in Fibrinogen, Biophysical Journal. 103 (2012) 2399-2407
Shen, Fabrication and physical and biological properties of fibrin gel derived from human plasma, Biomedical Materials. 3 (2008) 1-9
Online since: December 2013
Authors: J.M. Rohani, H. Mihanzadeh, Milad Hatami, Mohammadreza Haghighi, Seyed Mojib Zahraee
Indeed, simulation can be applied to analyze how manufacturing systems performance is influenced by different factors such as layout structure, number of resources are used in material handling, resource functioning policies and usage of various kinds of material handling systems.
For production of industrial paints at first, raw material is moved from the inventory part and resin is added to the calderon and then carried to the mixer by jack pallets.
If the product does not meet the standards it is mixed again and other necessary material are added to the paint.
Journal of Management Science, 19(6)
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