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Research and Design for High Precision Ultrasonic Distance Measurement System Hua Guo*1,a, Shengwen Yu2,b 1College of Information Science and Technology, Shandong University of Science and Technology, Qingdao, Shandong, China 2College of Geomatics, Shandong University of Science and Technology, Qingdao, Shandong, China astone_strong@163.com, bsdkdswyu@126.com Keywords: Ultrasonic; Distance measurement; Waveform rebuild; Energy attenuation Abstract.
Ultrasonic speed is affected by the environment temperature and the reflecting surface of the measured object too. the error caused by temperature have compensation algorithm can be used, more mature, will not be discussed, as measured object reflecting surface, in this article assumed to be uniform smooth surface, material and shape do not do in-depth study too.
Journal of Zhengzhou University (Engineering Science). 2006, 27(1): 86-90 [4] Zhang Ke,Liu Hai-gang,Research on a Method of Imploving Ultrasonic Ranging Precision.

Preparation and Characterization of 1-methyl-3-butyl Nitrate Peng Tian1,a*, Yanhong Kang1,a*,Zhigang Zhao2,b, Tianling Qin1,a, Bo Meng1,a, and Wenle Du1,a 1College of Chemistry and Life Science, Shenyang Normal University, Shenyang 110034, China 2Fundamental Education Division of Computer and Mathematics, Shenyang Normal University, Shenyang 110034, China aemail: tianpenglnu@sina.com, bemail: zhigangzhao@sina.com *: email: tianpenglnu@sina.com, email: kydaaaa68@126.com Keywords: BMIC-NO3 ionic liquid, sythesis, characterization, IR–spectrum Abstract: 1-methyl-3-butyl Imidazole chloride is prepared by 1–methyl imidazole and chlorinated n-butane.
Therefore it is showed that the synthetic material is BMINO3.
Acknowledgements This work was financially supported by the National Natural Science Foundation of China(21073123), National Natural Science Foundation of Liaoning Province(201102202), Education Bureau of Liaoning Province of China(LS2010153) and Natural Science Foundation of Shenyang city(F12-277-1-46).
W.John, Journal of Molecular Catalysis A:Chemical, Vol. 214 (2004) 11

In Fig. 9 are compared the Jc(B) behaviour, at 20 K, of bulk materials of different grain size.
Figure 10 - RF surface resistance of bulk MgB2 samples : #1) Small grains (<5 µm); #2) Medium grains (<40 µm); #3)Large Grains ( < 100µm) Perspective applications for bulk MgB2 The high Tc bulk superconducting materials up to now considered are the BSCCO-2212 and the melt textured YBCO-123 materials.
Conclusions The field of bulk superconducting materials has a new interesting candidate, the MgB2, to face with various applicative needs.
"High Temperature Superconductor Bulk Materials" WILEY-VCH (2006) [2] G.Giunchi, Int.
Journal of Modern Physics B17 (2003) p 453 [3] G.Giunchi,L.Malpezzi,N.Masciocchi, in press on Solid State Sciences (2006) [4] P.Piseri,A.Podestà,P.Milani,C.Orecchia,G.Giunchi , private communication (2004) [5] G.Giunchi, G.Ripamonti, T.Cavallin, E.Bassani Cryogenics 46 (2006) p 237 [6] F.Cordero, R.

Any improvement in materials and/or architecture of interconnects will make this technology more affordable and competitive.
Methods Materials.
Caboche, Journal of power sources, 193 (2009) 136–145 [9] S.
Saintier, Materials Science and Engineering: A, Volume 527, Issues 21-22, (2010), Pages 5858-5866 [11] J.
Chêne, Plastox2007, EDP Sciences, (2009) 131-145

Fiber-Strengthening Polymer Composites Reinforcement Method Fiber reinforced polymer composite materials reinforcing method is a measure which uses high strength fiber and resin paint of composite material , reinforcing the damaged components.
As to the selection of materials or construction methods, it can be divided into cement mortar smear method, embedded in epoxy mortar smear method, gouges fill method, surface spraying and playing hoop reinforcement sealing method.
Coupled with the frequent earthquakes in recent years,it becomes even more significant for the old bridge seismic strengthening .The bridge seismic reinforcement technology develops fast in recent years, especially in Japan and the United States, and meanwhile some new seismic technology in-depth studyis carried as well the new materials in the actual bridge seismic engineerings applied.
Both Bridge Coagulation Disease Special Clinic and Etiology of The Current Bridges [J].Sichuan Building Science 2006.10 (5) [9] Qing-shan Li The Bridge Strengthening Technical Approach and Design Principles [J] Science and Technology of Qinghai traffic, 2006 (6) [10] Huai-zhi Gao, Jun-jie Gong.
Civil Engineering Journal, 1996,29 (4) :3-10

Materials of coating and substrate The spray powder used in this study was Cr3C2-20(20Ni80Cr) powder supplied by Oerlikon Metco Company with particle size from 15μm to 45μm and component are 80%Cr3C2, 1.6%Ni, 4%Cr.
Size of samples Material of substrate is steel shaft 40Cr[1010] with component chemistry shown in Table 1.
Proceedings of the Estonian Academy of Sciences, 65(2), 101-106, 2016
Berndt, ASM International, Materials Park, OH, pp. 895-900, 1997
[18] Test methods for build-up thermal spraying – JIS H 8664:2004 [19] Test methods for ceramic sprayed coatings, JSA - JIS H 8666:1994 [20] Standard Test Method for Microindentation Hardness of Materials, ASTM E384 – 17: 2011

I.Introduction Magnetic probes has gained widespread interest across several disciplines such as chemistry, life sciences and biomedicine due to its excellent magnetic control properties, and can be used in magnetic separation[1], molecular imaging[2], intracellular hyperthermia[3] as well as drug delivery system[4].
II.Materials and Methods A Reagents and Instruments All chemicals were analytical reagent grade without further purification.
III.Results and Discussions A Morphology and diameter of dextran coated SPIO Fig. 1 (A) TEM image of dextran coated SPIO and (B) statistical diameter distribution by Micrograph Fig. 1 (A) shows that the morphology of the most of the SPIO was nearly spherical, and dispersed well in water; the diameter of dextran coated SPIO was around 8-10nm, and the superparamagnetic behavior of the materials can be attributed to such a small size.
Pellegrino, “From iron oxide nanoparticles towards advanced iron-based inorganic materials designed for biomedical applications,” Pharmacol.
Xu, “Efficient Synthesis of α-D-Glucose-1-Phosphate by Maltodextrin Phosphorylase Immobilized on Amino-functionalized Magnetic Nanoparticles,” Chinese Journal of Catalysis, vol.31, no.9, pp. 1227-1232, October 2010

Mizuno, "Development of mass measurement devices for zero-gravity experiments", Applied Mechanics and Materials, (in print)
Miki, “Balance for measuring mass under microgravity conditions”, AIAA Journal, Vol.39, No.3, pp.455-457, 2001
Fujii, “Reconsideration of body mass measurement on the International Space Station and beyond”, Key Engineering Materials, Vols. 381-382, pp 461-464, 2008
Shimada, "Mass Measurement in Space, 1964-2010", Applied Mechanics and Materials, (in print)
Fujii, "Issues with body mass measurement on the International Space Station (ISS)", Applied Mechanics and Materials, (in print).

Study on safety assessment methods of the penstock of the High head hydropower station using the China standard GB/T 19624-2004 Xiaogang Zhu1, a, and Binlong Lei2,b 1School of Materials Science and Engineering, Southwest Jiaotong University, China, 610031 2School of Materials Science and Engineering, Southwest Jiaotong University, China, 610031 agangxiaozhu20055286@yahoo.cn, blbl-22110@163.com Keywords: finite element analysis, ultrasonic flaw detection, planar defect, general assessment Abstract.
Table 1 Geometrical dimension and material characteristics of penstock Inner diameter D/mm Thickness of the penstock t/mm Yang’s modulus E/MPa Poisson’s ratio ν Biggest pressure designed P max /MPa 1200 34 2.0×105 0.3 13.7 Fig.1 Finite element model of penstock Fig.2 Stress-strain curve of Q345 steel 1.2 Results and discussion According to Fig.3, Fig.4, Fig.5 and Fig.6, with the increase of the pressure, the plastic strain of the center of the pipe close becomes larger.
characterization (1)1# defect is characterized as the longitudinal semi-elliptical surface crack: 2c=18 mm，a=9 mm; (2)2# defect is characterized as the longitudinal semi-elliptical surface crack: 2c=28 mm，a=14 mm; (3)3# defect is characterized as the longitudinal semi-elliptical surface crack: 2c=30 mm，a=14 mm; (4)4# defect is characterized as the longitudinal semi-elliptical surface crack: 2c=25 mm，a=12 mm; (5)5# defect is characterized as the longitudinal elliptical internal crack: 2c=1 mm，2a=1 mm,p1=13mm [2,5]. 3.4 Stress calculation The primary film stress of the longitudinal crack in the circumferential weld joints is evaluated as =1.79=216.4Mpa.The primary film stress of the longitudinal crack in the longitudinal weld joints is evaluated as=1.3529=327Mpa.Because the thickness of the penstock is smaller, the primary bending stress is evaluated as =0.The secondary film stress is evaluated as =0.6=228MPa；The secondary bending stress is evaluated as =0[2]. 3.5 Determination of material
The fracture toughness of the material is evaluated as =.The fracture toughness of the material used as assessment is evaluated as =2273.8. 3.6 Calculation of and The andparameters are evaluated as follows [2，5]: =（） (4) =（） (5) Table 6 Values of and Specimen Number 1 2 3 4 5 /(N.mm-1.5) 772.3 979.2 1024 1396 262.6 /(N.mm-1.5) 813.7 1031 1079 973 183 3.7 Calculation of The parameter of the surface crack in the cylinder is evaluated as follows [2]: =（） (6) (7) The parameter of the elliptical internal crack in the cylinder is evaluated as [2]: (8) Where；.
International Journal of Pressure Vessels and Piping82, 2005:787-796

Introduction Nanotubular materials have been the topic of current research interest for their potential applications in various fields such as catalysis, integrated circuits, biosensors, photovoltaic devices, etc. [1-5].
Controlled dimensionality and size of these tubular carbon materials have also been regarded as significant factors that lead to certain unexpected properties, for example, isotropic or anisotropic behavior and region-dependent surface reactivity.
Infrared analysis generally finds encounters associated with carbon materials, yet this technique is useful for studying the nature of oxygen surface groups.
Dekker, Logic Circuits with Carbon Nanotube Transistors, Science 294 (2001) 1317-1320
Bharadwaj, Comparative study of carbon nanotube dispersion using surfactants; Journal of Colloid and Interface Science 328 (2008) 421–428