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Online since: August 2013
Authors: Zhen Hua Mao, Zhe Min Chen, Li Dong Wang, Bing Hui Ma
Introduction Laser induced plasma spectroscopy(LIBS) is gradually on the rise in recent years, a broad-spectrum detection technology, it is one of the atomic emission spectrometry using a focused laser pulse in the material surface,To form a local high temperature, leading to partial sample vaporized, resulting in the sample atoms or molecules in an excited state or ionized thereby plasma plume is formed on the sample surface.
Excited state atoms and ions in the plasma portion of the energy in the form of light in the relaxation processradiation, this radiation with a significant element feature information. however this characteristic lines tend to have a very narrow linewidth, and therefore need to be collected by high-resolution spectrometer, recording and analysis of radiation spectrum, in order to achievepurpose of the qualitative and quantitative analysis of the chemical elements in the solid, liquid and gas samples., the LIBS technology applications areas in addition to the traditional chemical analysis,There also includes environmental monitoring, industrial line measurement, biotechnology, heritage conservation, nuclearindustrial, deep space exploration, marine science, surface analysis, and many other areas.In this paper, a self-made high-resolution miniature fiber optical spectrometer.
Taking into account the liquid and solid materials LIBS signal is weak, it ultimately has a high sensitivity ILX554B changed detector has the following characteristics: effective pixels number 2048; pixel size of 14 um * 56 um; single 5 V power supply; ultra-high sensitivity; built-in timing generator and clock drive; built-in sample-and-hold circuit; maximum clock frequency of 2 MHz.
[2] Chenji Wu, Wang Wei, a new type of color measurement instrument [J] Journal of China Institute of Metrology, 1998,17 (2) :61-66
Online since: August 2013
Authors: Xiao Zu Su, Zhi Hua Li
Experimental Investigation on Flexural Behavior of 500MPa Reinforced Concrete Beams with and without skin reinforcement Zhihua Li 1, a,Xiaozu Su 2, b 1 Building Science and Engineering College, Yangzhou University, Yangzhou 225127, P.
There are several practical advantages to using this new high-strength material, including reduction of congestion in heavily reinforced members, improved concrete placement, savings in the cost of labor, reduction of construction time.
Experimental Program Specimen and Material Details The test series consisted of 14 simply supported concrete beams reinforced with 500MPa longitudinal steel bars.
Advanced Material Research, Vol. 168-170 (2011), p. 1518-1523
Journal of Tian Jin University, Vol. 40 (2007), p. 507-511.
Online since: October 2018
Authors: Bing Li, Chun Yuan Ma
Experimental Materials.
The powder activated carbon of 0.075 mm in size was selected as experimental material, which was washed with distilled water and then dried for 24 h at 105 °C in an oven.
Liu, Dynamic mass transfer process of activated carbon desulfurization on fixed bed, Journal of Yangzhou University (Natural Science Edition), 3 (2007) 65-68
Online since: December 2010
Authors: Guo Xiang Yang, Fa Quan Wu, Jin Yu Dong, Dong Wang
Swelling Potential Indexes of Swelling Rock in Zhangjiakou District Dong Wanga, Guoxiang Yangb, Faquan Wuc , Jinyu Dongd Chinese Academy of Sciences Key Laboratory of Geomechanics, Institute of Geology and Geophysics, Chinese Academy of Sciences Beijing ,100029,China; aeastapollo@163.com , byanggx@mail.iggcas.ac.cn , cfaquanwu@mail.iggcas.ac.cn, d 373400870@qq.com Keywords: Swelling Rock; Swelling Potential; Montmorillonite; Abstract: The indexes to determine the swelling potential of swelling rocks are still not unified.
Remote Sensing for the Earth Science, 3rd ed.
So the relationship between then is not linear; generally speaking, if the free expansibility of the material is more than 40% and the montmorillite content is more than 8~10%[[]Yong-xin QU, Zhi-lan WU, Xiao-lan XU. et.c, Study of swelling rocks in east China, Weak rocks engineer, 1991,(1-2):1~13 ].
Journal of Hydrogeology and Engineering Geology,1988,(5): 36~39 (in Chinese) ] (1991) put forward the method that to determine the swelling potential of swelling rock based on the dry saturated water-absorbing capacity. relationship between montmorillite content and the dry saturated water absorbing capacity has been determined through testing and shown in fig.3.
Online since: January 2013
Authors: Guo Jing He, Jin Yi, Si Si Liu, Zhi Yong Li, Zu En Zheng
Construction Method and Numerical analysis on the bearing capacity of the large diameter and abyssal pile located in complex karst area Jin Yi1,a, Guojing He1,b, Sisi Liu 1, Zhiyong Li2 and Zuen Zheng2 1 Central South University of Forestry and Technology, Changsha 410007, Hunan , China 2Traffic Science Research Institute of Hunan Province, Changsha 410001, Hunan , China ayjcc1978@163.com; bcegjhe@hotmail.com(Corresponding author) Keywords:karst region;large diameter and abyssal pile;finite element model; construction method; Abstract.
The contact of stratigraphic unit and pile shaft unit is calculated by nonlinear three line load transfer function, take zero as the contact parameter of the karst cave, consider the compression of pile shaft only, and tip resistance is calculated by nonlinear material hardening model.
Acknowledgements The authors gratefully acknowledge the financial support provided by the Natural Science Foundation of China (No. 51108470 and No. 51178473) and the Hunan traffic science and technology projects (No. 200929).
Chinese Journal of Geotechnical Engineering, 2008,30(3):336-340
Online since: October 2012
Authors: Jin Xiang Fu, Xiang Nan Zhang, Rong Xin Zhang
Test Materials and methods sources and basic properties of the sludge.
The rate of Fe2+ This test uses Fe2+ as a mixture of Thiobacillus part of energy material, Fe2+ oxidation rate in direct response to microbial growth activity.
[2] bioleaching removal from sewage sludge in Cu, Zn, Ni [3] Zhou Lixiang, Shen Qirong, Chen Tongbin, heavy metal and nutrient elements in city sludge mainly fractions in the distribution and chemical speciation, Journal of Environmental Sciences, 2000, 20 ( 3), 269-174 [4] Huang Ming.
Online since: October 2011
Authors: Ming Jian Lu, Hai Peng Geng, Guo Hui Xu, Yu Lie
Preload relaxation is a complex phenomenon and the amount of preload relaxation is quite difficult to characterize since it must consider the materials, loading, and physical environment, etc.
On relaxing the tension, the rod stretch drops to around the nominal value, resulting in utilization of only the half yield strength of the rod material.
Acknowledgements This work is supported by the National Program on Key Basic Research Projects of China (Grant No. 2007CB707706) the National High-tech Research and Development Program of China (Grant No.2007AA050501), and China Postdoctoral Science Foundation (Grant No. 20100471612).
[6] Ali A.Alkelani,Sayed A.Nassar.Formulation of Elastic Interaction Between Bolts During the Tightening of Flat-Face Gasketed Joints,Journal of Mechanical Design,2009,131(2),021004(9 pages)
Online since: August 2013
Authors: Chyung Ay, Cheng Chang Lien, Chao Wang Young, Pao Chia Pan
Materials and Methods (I) Comparison for the Verification of CoventorWare and ANSYS with Same Model 1.
Table 1 shows material parameters used in the analysis.
Chen, Science News, 24(6) (2003), 62-69, [5] M.
Evans, Journal of Micromechanics and Microengineering. 13(2003) :S125-S130.
Online since: December 2014
Authors: Hong Hu, Da Fei Yao, Zi Jiang Yang
Through changing the material space, to promote the big change of society organization of the urban-village, then achive a proper fusion of the urban-village and city The situation and problems of Urban-village in Xiaogan area With the development of city, the cultivated land became more cherish to villagers.
Council should strengthen the management of reconstruction of "urban-villages" project, promotion of new materials, new techniques, new technologies, strengthening the technical guidance of the construction, and should have very strict quality control.
Beijing:Science press,2004
Journal of south China university of technology,2002,3
Online since: July 2019
Authors: M. Rachimoellah, Siti Zullaikah, Maria Christy P. Jessinia, Rinaldi Rinaldi, Medina Yasmin, Da Wei Wu
Rachimoellah1, Dawei Wu2 1Department of Chemical Engineering, Institut Teknologi Sepuluh Nopember (ITS), Kampus ITS Keputih Sukolilo, Surabaya 60111 Indonesia 2Marine Engineering, School of Marine Science and Technology, Newcastle University, NE1 7RU, United Kingdom *Email: szulle@chem-eng.its.ac.id, szullehakim@gmail.com Keywords: Chlorella Vulgaris, Subcritical Water, Co-solvent, Yield of Lipids.
Experimental Materials Dried microalgae (Chlorella vulgaris) was obtained from Gajah Mada University, Indonesia.
Maximum pressure and temperature allowed of the reactor material were 120 bar and 260oC, respectively.
Chinese Journal of Chemical Engineering. 26:17-30
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