bluuebunny/crossref_metadata_2025 huggingface dataset:
Research on Intelligent Monitoring System of Fangcheng Port's Bulk Cargo Ship Unloader
Authors: Chen Jia Juan , Zhang Song Bo , Su Zeng Rong
Published: September 2013

To intelligently monitor port machinery state of logistics operation in western China and to meet the stringent needs for future development of Fangcheng Port‘s business, the paper studies intelligent monitoring system of Fangcheng Port’s bulk cargo ship unloader. It consists of monitoring requirements analysis, system architecture design, software function design, key technology research, etc. The monitoring functions focus on the real-time monitoring of ship unloaders’ working state, fault information management, work load query, statistical report of work load, etc. In such a monitoring system, the wireless base stations and wireless LAN technology are used to achieve the collection and transmission of real-time monitoring information. This system has been operated in 14# and 15# ship unloaders of Fangcheng Port.
A Class of Integral Inequality and Application
Authors: Wang Wu Sheng
Published: September 2013

We discuss a class of generalized retarded nonlinear integral inequalities, which not only include nonlinear compound function of unknown function but also include retarded items, and give upper bound estimation of the unknown function by integral inequality technique. This estimation can be used as tool in the study of differential equations with the initial conditions.
A Variable Weight Function Model in Geological Variables Function Research
Authors: Liu Wen Bo , Liu Lai Jun
Published: September 2013

In mineral resources prediction and other research of geological variables, stability exactness of quantitative models concern modeling conditions, geological variables from model and the status of the variable. In traditional geological modeling process, variable support is measured under some contrains weight and this kind of weight is characterized by constant coefficients. Constant weight[1] has some limitations due to structuredness and dependency of variable. For overcoming the inflexibility of constant weight, this paper proposes geological variable mathematics model basedd state variable vector. We revise existing form of state variable weight and provide logarithm state variable vector as measurement level of geological variable weight coefficients. According to 1:200000 scale geochemistry measured data from Baishan area, we calculate the samples unit connection degree based on exponent and logarithm state variable vector and compare the connection degree based on constant weight. The connection degree sorting has the similarity as a whole among them, but there is the obvious difference locally. We can conclude that geological variable weight function based on state variable vector is more flexible and fine.
The Thermal Shock Resistance of Mg-PSZ/LaPO4 Ceramics
Authors: Li Zhong Qiu , Ci Li Jie , Feng Tie Cheng , Zhang Shao Yan
Published: September 2013

The mechanical properties and thermal shock behavior of Mg-PSZ/LaPO4ceramics was investigated. The thermal shock resistance of the materials was evaluated by water quenching and a subsequent three-point bending test to determine the flexural strength degradation. Mg-PSZ/15LaPO4composite showed a higher thermal shock resistance and behaved as a typical refractory. The calculation of thermal shock resistance parameters for the composites and the monolith had indicated possible explanations for the differences in thermal shock behavior.
The Effect of Curing Conditions on Mechanical Properties and Durability of Concrete
Authors: Chen Hai Bo , Fu Yu Fang , Jia Xue Bin
Published: September 2013

Curing conditions is one of the most influential factors on mechanical properties and durability of concrete. The mechanical properties (strength and dynamic modulus of elasticity) and durability (water permeability, air permeability and coulomb electric flux) of concrete under water curing and air curing were analyzed through the tests, and the significance of the curing conditions influence on mechanical properties and durability were compared. Test results indicate that the effect of curing conditions on the durability was much large than on the mechanical properties, and strength should not be the single control indicator while considering the effect of curing, moreover the some durability indicators of concrete also should be taken into consideration, which can provide the reference for engineering application.
Experimental Study on the Effect of Cathodic Protection System for Concrete Slab Specimens with Zn-Mesh Sacrificial Anode in Marine Environment
Authors: Jeong Jin A , Jin Chung Kuk
Published: September 2013

This study is to acquire the confirmation data regarding the cathodic protection (CP) characteristics for slabs in marine bridges and piers exposed to hash seawater environments. It was possible to confirm the performance of CP only by the measurement of CP potentials for the slab specimens applied with zinc mesh sacrificial anode CP system. The CP current density for the cathodic protection (CProt) that CP started after a repair of corrosion was 2 times higher than that for the cathodic prevention (CPrev) that CP commenced from the beginning of experiment, and the most of protection current density (87.0-91.5%) flew to the closer top rebar in slab specimens. 4 hour depolarization potentials were higher in the CPrev system than in the CProt one, and it was confirmed that the CPrev has more protection effect with less protection current, comparing to the CProt. It was also confirmed that the CP of both CPrev and CProt by means of zinc mesh sacrificial anode for reinforced concrete structures were very effective corrosion protection technology in marine environment.
Experiment Study on Mechanical Properties of Shotcrete under Heat Injury Environment of High Ground Temperature Tunnel
Authors: Fan Yu , Cui Sheng Ai , Chen Tao , Zhou Zhi Hua
Published: September 2013

With the tunnel growing more long and deep,heat injury problems have become increasingly prominent.In order to analyze how would the environment of high ground temperature impact on compressive strength of shotcrete, experiment was designed to explore the compressive strength of C25 shotcrete at 28d age by simulating environmental. The test results show that: water tank and the oven can more accurately simulate the natural hot-humid and hot-dry environment; Compared to the standard curing conditions, Whether in the hot-humid environment or hot-dry environment, the compressive strength of shotcrete is decreased. Mixed with 25% fly ash can improve the compressive strength of shotcrete in hot-humid environment.
Ionic Liquid-Assisted Synthesis of Anatase Nanostructured TiO2 Aerogel Doped with Fe3+ by a Low Temperature Sol-Gel Process and its Photocatalytic Performance
Authors: Wang Ning Ning , Yu Chun Ling , Dai Hong Yi , Fu Ying Huan , Shao Guo Lin , Dong Xiao Li
Published: September 2013

Anatase crystalline TiO2 aeroge and TiO2 aerogel doped with Fe3+ were prepared at low temperature (60°C) using ionic liquid (IL) assisted sol-gel method. In this system, ionic liquid was not only an effective solvent but also an important template, which enhanced the polycondensation and crystallization rate, facilitated the formation of anatase crystal. Due to the effect of template, anatase crystalline TiO2 aerogel can be synthesized at the aging temperature of 60°C and drying under ambient pressure. The as-synthesized samples were characterized by X-ray power diffraction (XRD), scanning electron microscopes (SEM). The photocatalytic performance of pure TiO2 aerogel and TiO2 aerogel doped with Fe3+ aerogel was evalutaed by decolorization of reactive brilliant blue under visible light irridation. The results indicated that TiO2 aerogel doped with Fe3+ exhibited higher photocatalytic activity than pure TiO2 aerogel and Degussa P25.
Extracellular Biosynthesis of Ag Nanoparticles by Commercial Baker's Yeast
Authors: He Feng Jiao , Li Zhao Hui , Gao Feng , Yang Zhi
Published: September 2013

In this paper, we demonstrated a simple and efficient method to synthesize Ag nanoparticles (NPs) using commercial and highly active baker's yeast as a stabilizier and reducing agent, which got rid of the cumbersome steps to cultivate yeast. Ag NPs could be formed within 2 min at pH value higher than 8 when silver ion react with the yeast. The effect of pH on the extracellular synthesis of Ag NPs was investigated. The results indicated that the optimized pH value was above 8. The biosynthesized Ag NPs had absorption peaks at 413~455 nm corresponding to their surface plasmon resonance. SEM and TEM images showed that the nanoparticles were uniformly monodisperse and spherical with the size of around 5~25 nm.
Preparation of Hierarchical CuO Nanoparticles and their Photocatalytic Activity
Authors: Wang Li Min , Sun Hong Ming , Ma Zhong Chao , Wang Ao Xuan
Published: September 2013

The uniform hierarchical and microspheric copper oxide (CuO) nanostructures, which have been successfully prepared via a simple one-pot method. The detailed morphology and structure of the synthesized hierarchical and microspheric nanostructures were characterized by scanning electron microscopy (SEM) and X-ray diffraction (XRD) and UVvisible spectroscopy. The morphology of CuO particles depends on the ammonium dihydrogen phosphate (ADP) used in the synthesis, the formation mechanisms were proposed based on the experimental results. The catalytic activity of as-synthesized CuO was demonstrated by catalytic oxidation of methylene blue in the presence of hydrogen peroxide (H2O2) and CuO with hierarchical nanostructures was found to be the best catalyst.
Soft Template CTAB-Assisted Synthesis of Mesoporous Ni-B Amorphous Alloy Nanoparticles
Authors: Hou Guang Ya , Wen Qi Bin , Tang Yi Ping , Cao Hua Zhen , Zheng Guo Qu
Published: September 2013

Ni-B amorphous alloy particle is a newly promising candidate of catalyst for methanol electrooxidation in Direct Methanol Fuel Cell (DMFC). For enhancing catalytic activity and increasing surface area, mesoporous Ni-B amorphous alloy nanoparticles was manufactured by chemical reduction of NiCl2 and KBH4 via surfactant hexadecyltrimethyl ammonium bromide (CTAB) as an soft template. The effects of the CTAB content and the feeding order on the phase evolution, microstructure, and surface area of the resulting products were investigated. Phase and structure of the samples were investigated using XRD, SEM and BET. Amorphous Ni-B nanoparticles with mesoporous structure were obtained in this study. The CTAB content great impacted the mesoporous structure of the resulting products, although the obviously effect on the phase was not found. The surface area, pore volume and pore diameter of samples improved with the increase of CTAB content. Compared to nanoparticles obtained by CTAB solution added to NiCl2 solution, nanoparticles obtained by NiCl2 solution added to CTAB solution exhibited better mesoporous structure.
Synthesis and Characterization of CuO Nanorods by Hydrothermal Method
Authors: Mekla Vatcharinkorn , Tipparach Udom
Published: September 2013

This paper reports the synthesis of CuO nanorods from Copper (II) sulphate (CuSO4) aqueous solution under the hydrothermal condition variable concentration of NaOH (aq) at 160 °C for 12 h. The thin films of the nanorods on glass were prepared by dip-coating technique. The structure and chemical natures of the obtained materials were studied using powder X-ray diffraction (XRD), Scanning Electron Microscopy (SEM). The optical properties of the nanorods were also studied by UV-visible spectra. The diffraction peaks were quite identical to those of pure CuO, which can be indexed as the monoclinic structure CuO. The diameters of CuO nanorods vary from 10 nm to 100 nm and the length is about several micrometers. The top-view SEM images be seen clearly that high-density, horizontally scattered nanorod were grown on the product prepared at concentration of NaOH (aq) 10 M at 160 °C for 12 h. The spectral of UV-vis data showed the strong cut off at 336 nm.
Study on a Novel Structure of Yttrium Complex, C4H10O10Y
Authors: Liu Hai Xing , Zhang Qing Hua , Yu Zhang Xue , Fan Quan Hua , Huang Ting Ting , Zhang Xiao Ping , Xu Yang
Published: September 2013

The Y complex C4H10O10Y has been synthesized from a hydrothermal reaction and the crystal structure has been determined by means of single-crystal X-ray diffraction. The Y atom is coordinated by nine O atoms. The molecular structure stabilized by the O-H…O hydrogen-bonding interactions.
Research on the Si-Ti High Temperature Oxidation-Resistant Coatings for Tantalum Alloys
Authors: Song Pei Pei , Le Jun , Ye Feng , Sheng Xiao Cheng , Zhang Xiao Wei
Published: September 2013

Si-Ti coatings were prepared on the surface of T-222 alloy by fused slurry method at different temperatures (1425-1500°C). Microstructure and composition of the coatings were characterized and analysed through scanning electron microscopy (SEM), X-ray diffraction analysis (XRD), energy dispersive X-ray spectrometry (EDS) respectively. The coating fabricated at 1450°C exhibited excellent structure compatible with high temperature oxidation resistance. Its surface is relatively smooth with few holes and cracks and the main phase on the surface is (Ti, Ta)Si that possesses outstanding corrosion resistance. Moreover, the cross-sectional structure of the coating is smooth and compact which can effectively prevent O2 from permeation. The isothermal oxidation behaviors in pure O2 atmosphere at 1500°C for 2h finally demonstrate that the optimum coating temperature is 1450°C.
Synthesis and Characterization of SiC Nanoparticles with Lamellar Structures from Taixi Coal
Authors: He Kang Li , Liu Ning , Zheng Rui Yuan , Liu Wang Yi , Li Bing , Wang Ze Yong
Published: September 2013

A simple and cost effective method was reported for the synthesis of β-SiC nanoparticles with differernt morphologies using Taixi coal as carbon source and Fe (NO3)3·9H2O, Co (NO3)2·6H2O and NiCO3·2Ni (OH)2·4H2O as additives, respectively. The structures and morphologies were characterized by XRD, FTIR, BET and SEM. The results show that SiC nanoparticles with lamellar structures were successfully synthesized at 1450 °C with NiCO3·2Ni (OH)2·4H2O as an additive which are very scarce to our knowledge. whats more, the formation mechanism of lamellar structures SiC nanoparticles were also discussed.
Preparation of Titania Nanowire Arrays by Sol-Template Method
Authors: Li Ming Li , Yu Qiong , Qian Kun Ming , Hao Jie , Zhou Yu Song
Published: September 2013

The template method combined with sol-dipping deposition or sol-electrophoresis was used to prepare titania (TiO2) nanowires with shape of rod or string of beads. The SEM was used to characterize the surface and cross section of the TiO2nanowire arrays. With parallel orientation, the nanowires were uniformly distributed.
Effect of Different Particle Size of Nano-Zinc Oxide on the Surface Binding Energy in Polyimide/Zinc Oxide Composites
Authors: Lin Jia Qi , Lin Hui , Yang Wen Long , Li Xiao Kang , Liu Ying , Xie Zhi Bin , Zhang Pa Nan
Published: September 2013

The surface binding energy between the polyimide(PI) and zinc oxide (ZnO) have been simulated using the molecular dynamics theory.The PI / ZnO model has been established by using Forcite program package of Materials Studio software.The total atoms number about 300 million, the radius of the nano-ZnO cluster model have five groups are respectively 0.5 nm, 1 nm, 1.5 nm, 2 nm, 2.5 nm.The effect of different particle size of nano-ZnO on surface binding energy in PI / ZnO composites was investigated. The relationship between the surface binding energy of PI / ZnO composites and the nano-Zno radius, the maximum of surface binding energy were obtained. The computed results show that the intermolecular bonds between nano-ZnO and PI are mainly van der waals bonds.And the surface atomic number of nano-ZnO increases along with the increasing of nano-ZnO radius, indicating that the increasing of contact surface between the nano-ZnO and PI, which lead to the surface binding energy increases, the total energy lower and the system more stable.
Effects of Conductive Properties with Conductive Particles Blended in Conductive Silicon Rubber
Authors: Li Bin , Zhang Yue Xian
Published: September 2013

This study outlines the influencing factors of the conductive properties for carbon black filled conductive silicone rubber. The conductive silicone rubber has been prepared. Researched on composite materials' conductive properties with different biomass and variety means by adding different conductive properties of carbon black and nanomodified materials. The results show that the combination of carbon black can improve the conductive properties of the composite material. Silica added can affect the conductive properties. Modified the materials appropriately can effectively improve the electrical properties of the material.
Preparation and Characterization of a Novel Polyurethane Solid-Solid Phase Change Materials
Authors: Wang Gui Fang , Li Dong Ying , Pei Guang Ling
Published: September 2013

A novel solid-solid phase change materials was synthesized by the two-step condensation reaction of polyethylene glycol (PEG1000), neopentyl glycol (NPG) and 4, 4-diphenylmethane diisocyanate (MDI). Polyethylene glycol (PEG1000) was used as soft segment and 4, 4-diphenylmethane diisocyanate (MDI) as hard segment. The composition, structure and phase change properties were characterized by Fourier transform infrared spectroscopy (FT-IR), differential scanning calorimetry (DSC), thermogravimetric analyzer (TGA), polarization optical microscopy (POM) respectively. The results indicated that the PCM appeared typical solid-solid phase transition property and the phase change enthalpy and phase transition temperature reached to 120.45 J/g and 37.32°C, respectively.
Preparation and Properties of Photochromic Microspheres
Authors: Li Dong Ying , Wang Gui Fang , Pei Guang Ling
Published: September 2013

Monodisperse porous polystyrene microspheres were prepared with the mixed solution of ethanol and water as dispersion medium and poly (vinylpyrrolidone) was used as dispersant. The even size of microspheres prepared at optimal process was about 1μm. Photochromic microspheres were obtained using polystyrene microspheres to absorb the photochromic materials. The effect of dispersion medium on the microspheres morphology was investigated. The adsorption parameters affecting microspheres adsorption quantity, such as the concentration of spiropyran solution and adsorption temperature, were studied in detail. Furthermore, photochromic properties of the microspheres were analyzed and PVA as coating was used to increase the fatigue resistance of photochromic microcapsules. The photochromic microspheres obtained could rapid reversibly change color under UV or sun light at room temperature and common pressure.
Spin State and Magnetic Properties of Nd1-xSrxCoO3 (0.1≤x≤0.5)
Authors: Yang Yi Yun
Published: September 2013

In this paper, the rare earth cobaltite Nd1-xSrxCoO3 (0.1≤x≤0.5) samples were prepared using conventional solid state reaction method. Magnetization and spin state of cobalt of sample were systematically investigated. The experimental result suggests that magnetization and the Curie temperature increase sharply with increasing Sr content. The Curie-Weiss fit shows that most of the Co3+ ions are in the intermediate spin state and the Co4+ ions are in low spin for x=0.5. Furthermore, our study confirms that spin-state transition take place in Nd1-xSrxCoO3.
Preparation of Novel Liquid Crystal Material with Trifluoromethyl Substitutent
Authors: Zhang Yong Ming , Wang Yi Wei , Zhang Mei , Liu Jian Fang , Si Jie , Dang Dan Dan
Published: September 2013

The liquid crystal material with trifluoromethyl substitutent is a very important liquid crystal monomer to combine mixture in the application of display area. In this paper, a kind of liquid crystal material with trifluoromethyl substitutent was synthesized by traditional method of Sonogashira coupling reaction, the reaction mechanism and reaction conditions were then obtained. In addition, the synthesized compound was characterized by FT-IR and1H-NMR to confirm the consistent structure with target compound.
Low Cycle Fatigue Study of 63Sn-37Pb Solder under Torsional Cyclic Loading
Authors: Guo Hong Qiang
Published: September 2013

In this paper, the torsional fatigue tests under angle control at the constant strain rate of 5×10-3/s were conducted on 63Sn–37Pb solder over a range of . The relationship of stress and strain for the 63Sn–37Pb solder was investigated. The number of cycle with loading decrease of 25% was thought as the fatigue lifetime. The parameters of Coffin-Manson equation were determined based on the experimental data.
Synthesis and Photochromism of Bis(thien-2-yl)Cyclopentene Derivatives
Authors: Zhao Sheng Min , An Wei Wei , Zhang Heng , Zhang Wen Guan
Published: September 2013

Bis (thien-2-yl) cyclopentene derivatives have been synthesized in the two routes. Upon irradiation with 313 and 405 nm light, the absorption spectrum of compound 3O and 4O did not change and clear isosbestic points appeared. These results suggest that the compounds do not decompose during the irradiation and are suitable as switches
Process Analysis of Rb+ and Cs+ Adsorption from Salt Lake Brine by Ammonium Molybdophosphate Composite Material
Authors: Yang Wei Jun , Liu Shi Ming , Li Yong Jin , Huang Yun Jing , Luo Xi Sheng
Published: September 2013

In this paper ammonium molybdophosphate (AMP) and ammonium molybdophosphate-zirconium phosphate-silica (AMP-ZrP-SiO2) were prepared as trace Rb+and Cs+adsorbents. The two showed good adsorption performance for trace Rb+and Cs+when dealing with the salt lake brine. AMP-ZrP-SiO2has better hydraulics performance, and is more suitable for column adsorption. The adsorption mechanism, enthalpies (ΔH0), Gibbs free energies (ΔG0), and activation energies (Ea) of Rb+and Cs+from salt lake brine by the two adsorbents were investigated. The results show that the adsorption processes of Rb+and Cs+on AMP and AMP-ZrP-SiO2are spontaneous and endothermic. The adsorption order of various ions on the two adsorbents is Cs+>Rb+>K+>Mg2+>Na+>Li+by comparing their Gibbs free energies. Through the analysis of activation energies indicates that AMP-ZrP-SiO2is more efficient than AMP in the enrichment process of trace Rb+and Cs+.
CO2 Solubility and Physical Properties of Two Containing Fluorine Functional Ionic Liquids
Authors: Fan Li Hua , Liang Ying Hua , Li Yu Hong
Published: September 2013

Two containing fluorine functional ionic liquids (ILs) (1-aminoethyl-3-methyl imidazolium trifluoroacetic acid salt ([aemim] [CF3COO]) and 1-aminoethyl-3-methyl imidazolium trifluoromethane sulfonic acid salt ([aemim] [TfO])) were synthesized and the samples were characterized by means of FTIR, 1HNMR respectively. The densities, viscosities, and electrical conductivities of the two samples were measured over the temperature range T = (303.15-333.15) K at atmospheric pressure. The solubility of CO2 in the two samples were investigated at temperature from 303.15 to 333.15 K and pressure from 0 to 7.14 MPa. Results showed that the maximum solubility of CO2 in [aemim] [TfO] was 0.759 (mole fraction) at 7.01 MPa and 323.15K, and the which of [aemim] [CF3COO] was 0.646 at 6.49 MPa and 313.15 K. The influence of the temperature and CO2 partial pressure on the process of CO2 absorption was discussed. The CO2 solubilities in different ILs were also compared. The Henry's constants and infinite dilution partial molar volumes for the ILs+ CO2 systems were obtained.
Initial Surface Reactions Mechanisms of Atomic Layer Deposition TiO2 Using Ti(OCH3)4 and H2O as Precursors
Authors: Zhou Guang Fen , Ren Jie , Zhang Shao Wen
Published: September 2013

The initial surface reaction mechanisms of atomic layer depositionTiO2using Ti (OCH3)4and H2O as the precursors are investigated by density functional theory. The ALD process is divided into two half-reactions, i.e., Ti (OCH3)4and H2O half-reactions. The adsorption of Ti (OCH3)4on OH/Si (100)2×1 surface is exothermic. However, the overall reaction of Ti (OCH3)4is endothermic. In addition, H2O half-reactions are endothermic and thermodynamically unfavorable.
Influence Nitriding in the Electrolytic Plasma on the Tribological Properties of Low-Alloy 40Cr Steel
Authors: Skakov Mazhyn , Sapatayev Yerzhan , Scheffler Michael
Published: September 2013

This paper presents the results of research influence nitriding in electrolytic plasma on the tribological properties of low-alloy 40Cr steel. It is shown that the process of electrolytic plasma nitriding can significantly increase the wear resistance of the samples 40Cr steel. Found that after nitriding component adhesive wear mechanism is changed to abrasion.
Preparation and Research on Anticorrosion Zinc-Rich Coating of Hydraulic Metal Structure
Authors: Liu Lei , Wang Zai Qin , Chen Liang , Li Zhen
Published: September 2013

The types and addition dose of zinc in the zinc-rich coating have a significant impact on the character of coating. Two types of the zinc powders and the amount of zinc were researched in this paper. It reveals that flaky zinc coating is better than the spherical zinc coating on corrosion performance, and the performance of the coating will be the best only when the solid content of zinc is reasonable. The results also show that optimal solid content of flaky zinc are 62.5%, 60% and 60.5% in the inorganic zinc-rich coating, epoxy zinc-rich coating and vinyl resin zinc-rich coating, respectively.
Semiconducting Behavior of Non-Solid Electrochemical State of Carbon Steel in Electrolyte Solution
Authors: Liu Wei Dong , Xiao Yi , Gu Jian Feng , Zhong Qi Jun , Yu Li Bin , Zhong Qing Dong
Published: September 2013

In this paper, the semiconducting behavior of non-solid electrochemical state of carbon steel in acid, base and salt solutions was studied by utilizing potential-capacitance and Mott-Schottky analysis. It was pointed out that the capacitance variation of space charge layer of non-solid electrochemical state of carbon steel in different solution was different. The non-solid electrochemical state showed p-type semiconducting behavior in 5 sulfuric acid and 5 % sodium sulfate solution. However, it showed n-type semiconducting behavior in 5 % sodium hydroxide, suggesting that the space charge layer of non-solid electrochemical state of the carbon steel in different electrolytes might be asymmetric.
Research on Application Performance of Surface Anti-Corrosion Technology of Corrugated Steel Beam Guardrails
Authors: Peng Lei , Guo Dong Hua , Liu Heng Quan
Published: September 2013

The hot-dip galvanized and hot dip aluminized are widely used surface anti-corrosion technologies in steel beam guardrails region all over the world. Both of coating can not only play the role of landscaping, but also can protect the base metal from being eroded, and greatly extending the life of the guardrails. The appearance quality, process characteristics, corrosion resistance and cost of the two anti-corrosion coating are described in this paper. By analyzing both the similarities and differences between the two anti-corrosion technologies and their application advantages, we hope to provide some references on choosing the surface anti-corrosion technology.
Design and Implement an iOS-Based M-Learning Platform for University Students
Authors: Liang Hui , Shi Min Yong
Published: September 2013

With the rapid development of computer and the mobile communication technology, the use of mobile phone technologies in education is getting more attention nowadays, which makes people gain learning environment and resources anytime and anywhere. We made a research of the theory of M-Learning based on smart mobile phone, and then built an iOS-based M-Learning platform including education platform module, learning resource library, management module, as well as end-user client implemented and deployed on iPhone.
Bending Response of Exponentially Graded Plates by a Meshless Method
Authors: Chen Ying Tao , Xiang Song
Published: September 2013

In the present paper, the higher order shear deformation theories of Touratier and Karama and meshless global collocation method based on the inverse multiquadric radial basis function are used to analyze the bending response of the exponentially graded plates. The material properties of the plates vary exponentially in the thickness direction. The present results are compared with three-dimensional elasticity solutions.
Microstructures and Properties of AISI 304L Stainless Steel Irradiated by High-Current Pulsed Electron Beam
Authors: Zhang Zai Qiang , Yang Sheng Zhi , Li Yan , Wang Xiao Tong , Hou Xiu Li , Lv Yi Ping , Guan Qing Feng
Published: September 2013

AISI 304L austenite stainless steel was irradiated by a high-current pulsed electron beam (HCPEB) source in different process. The microstructures were investigated in detail by electron microscopy. The changes of hardness and corrosion resistance induced by irradiation were also tested. The relationship between corrosion resistance and the microstructures has been explored. The experimental results demonstrate the potential of proper HCPEB processing for improving the hardness and corrosion resistance of metallic materials.
Optical Characterization of Novel Crystal Na5Bi (WO4)2(MoO4)2 :Yb3+
Authors: Zhang Jun , Chen Zhen Qiang , Wang Chun Hao , Li An Ming , Yin Hao , LI Zhen
Published: September 2013

The compound-anion polycrystalline material Yb3+:Na5Bi (WO4)2(MoO4)2 was synthesized by flux method. Many characterization of XRD, DSC-TG, absorption spectrum and emission spectrum were studied. The result is shown that the new crystal belongs to Tetragonal, and space group is I41/a (88). Its melting point is 619 °C and the absorption band, emission band, center emission wavelength are about 83 nm, 50 nm, 1006 nm respectively.
ZnS-Intercalated Montmorillonite: A Low Cost Potentiometric Sensor
Authors: Udkhao Siriphorn , Wongchaisuwat Atchana , Meesuk Ladda
Published: September 2013

ZnS is well known for its potential uses, both in crystal form and powder, as optoelectronic devices and as a phosphor. In this work, we prepared ZnS-intercalated montmorillonite by the insitu solid-solid reaction between Zn (II)-montmorillonite and sodium sulfide. A potentiometric electrode was constructed from a mixture of ZnS-intercalated montmorillonite, artificial graphite, polytetrafluoroethylene (PTFE) and carboxymethylcellulose (CMC) in an appropriate ratio. The electrode was used to determine S2- in aqueous solution, graphs of log [S2-] vs. measured voltage gave linear relation up to 3rd order of ion concentrations. It can be said that, this is the first time that ZnS-intercalated montmorillonite is used to construct a potentiometric electrode. Apart from a good precision, the electrode is good for its selectivity, durability and low cost.
Microstructure Evolution of 2024 Aluminum Alloys Subjected to Thermal Cycling in Simulated LEO Space Environment
Authors: Liu Shi Chao , Cai Jie , Ji Le , Zhang Zai Qiang , Hou Xiu Li , Lv Yi Ping , Guan Qing Feng
Published: September 2013

The microstructures and properties of 2024 aeronautical aluminum alloy subjected to thermal cycling were investigated in simulated Low Earth Orbit space environment. The experimental results demonstrate that the microhardness of aluminum alloys changed with the increasing of thermal cycles. The results of X-ray diffraction (XRD) and transmission electron microscopy (TEM) show that the property changes of the 2024 aluminum alloys during the thermal cycling period are closely related to the microstructural evolution. The relationship between the microstructural evolution and the thermal fatigue was also discussed.
Data Mining of Nicotine Demethylase Genes in Modern Tobacoo
Authors: Lian Jie , Wang De Ji , Xie Jun Ming
Published: September 2013

The predominant pyridine alkaloid in modern tobacco (Nicotiana tabacum) is Nicotine. However, with the existence of a class of Nicotine demethylases, a large proportion of Nicotine will be converted into Nornicotine during leaf senescence. Identification of Nicotine demethylases in modern tobacco is important, since Nornicotine will be nitrosated into N'-nitrosonornicotine (NNN), which exhibit carcinogenic properties in laboratory animals and is harmful for human heath. Although many efforts have been performed to identified, no comprehensive analysis was carried out for the subfamily of Nicotine demethylases. In this work, we performed a phylogenetic and comparative analysis for Nicotine demethylases with their highly homologs. A single and conserved mutation of W->C will prohibit the activity of Nicotine demethylases. Thus, the proportion of Nornicotine could be dramatically decreased if all Nicotine demethylase were single mutated by transgenic manipulation. Our results provide an insightful and solid foundation for further experimental design.
Structure of Composite Biocompatible Titania Coatings Modified with Hydroxyapatite Nanoparticles
Authors: Fomin Aleksandr Aleksandrovich , Rodionov Igor Vladimirovich , Steinhauer Aleksey Borisovich , Fomina Marina Alekseevna , Zakharevich Andrey Mikhailovich , Skaptsov Aleksandr Aleksandrovich , Petrova Natalia Vladimirovna
Published: September 2013

The article describes prospective composite biocompatible titania coatings modified with hydroxyapatite nanoparticles and obtained on intraosseous implants fabricated from commercially pure titanium. Consistency changes of morphological characteristics and crystalline structure, mechanical properties and biocompatibility of experimental titanium implant coatings obtained by the combination of oxidation and surface modification with hydroxyapatite during induction heat treatment are defined.
Synthesis and Characterization of Zinc Oxide Nanowires Grown Hydrothermally on Glass Substrate
Authors: Mejía-García Concepción , Díaz-Valdéz Elvia , Ayala-Torres M.A. , Romero-Labias J. , de La Cruz-Vicencio M.G. , Paniagua-Mercado Ana María , Andraca-Adame J.A. , Subramaniam V. , Romero-Ibarra J.
Published: September 2013

We report the synthesis of ZnO nanowires grown on glass using a two-step process: (a) preparation of the seed layer, and (b) growth of the nanostructures. First step:solutions of zinc acetate dehydrate and 1-propanol of 10 mM concentrationwere spin coated on glass at 2000 rpm for 58 s. A seed layer was obtained after three layers of spin coating. Second step: vertical ZnO nanowires were grown by dipping the substrate in a 25 mMequimolarsolution of zinc nitrate hexahydrate and hexamethylenetetramine. Subsequently, films were thermally treated with a commercial microwave oven at different power settings (350 and 700 W) for 5, 20 and 35 min. The ZnO nanowires obtained were characterized optical and morphologically. Scanning electron microscopy analysis showed that the size of ZnO nanowires was less than 50 nm in diameter and around 500 nm in length. XRD patterns revealed that when low power in the microwave oven was utilized, the presence of Zn (OH)2 on the films is observed. The ZnO nanowires bandgap energy was obtained from optical transmission spectra.
Fabrication, Characterization and Drug Release Property of Protein Encapsulated Emulsion Electrospun Nanofibers
Authors: Tian Ling Ling , Xin Ding
Published: September 2013

Emulsion electrospinning is a novel and straightforward tequnique to fabricate core-shell structured nanofibers on the basis of conventional electrospinning method. In this paper, the emulsion electrospunnanofibers were electrospun, and further characterized by scanning electron microscopy (SEM), Laser confocal scanning microscopy (LCSM) and water contact angle. The drug release property of emulsion electrospunnaofibers up to 28 days were recorded and analyzed. The biocompatibility of the emulsion electrospunnanofibers were evaluated and confirmed by MTS assay.
Feasibility Study on Applying a Single Loop-Based Vehicle Detector
Authors: Park Kyung Won , Lim Sung Han
Published: September 2013

This study is intended to evaluate the feasibility of introducing a single loop-based vehicle detector in preparation for installing the device for permanent traffic volume counts by segment. Existing AVC comprises two loop sensors and one piezo sensor which are costly for installation. Should the vehicle classifications be similar within the section, reliable traffic data collection would be possible using a single-loop alone, which needs to be evaluated. For this, traffic volume and vehicle classifications collected by two AVCs within a section were analyzed with cost-benefit analysis for analyzing the feasibility of applying a single loop-based vehicle detector . As a result of comparing and analyzing the vehicle type ratio in 36 sections where two AVCs are installed respectively, 90% of the total showed the error rate 15% or less, and according to T-test and correlation analysis result, no statistical significance between two locations in vehicle type ratio was found. According to economical feasibility analysis, B/C 12.19, NPV 474.0 bil and IRR 196%. Thus, collection of vehicle type ratio from one AVC in the section and installation of a singl loop-based vehicle detector in a single section would produce more efficient and cost effective count. Further study on cost and benefit through more intensive statistical analysis would be necessary in the coming days.
Effect of Increasing Rudder Deflection on Rudder Inflow for LNG Vessel in Shallow Water
Authors: Priyanto Agoes , Maimun Adi , Ahmed Y.M. , Mohamed Y.
Published: September 2013

This paper presents the rudder inflow including fully non-uniform wake on a deep drafted LNG vessel in shallow water. The Ansys Fluent v.6.2 software was used to solve Reynold Average Navier-Stokes (RANS) equations, and Icem CFD as a mesh generator. The modeling was conducted based on the B 5-88 type propeller, with a diameter (D) of 7.7 meters. The propeller was meshed using tetra unstructured mesh in a flow field based on 3-Dimension incompressible Navier-stokes solver. It was found in the propeller-to-rudder interaction that there was a slight drop of pressure at rudder leading edge of 00 rudder angle of attack (AoA). However, the dropped pressure was observed on its leading edge as the rudder angle of attack was increased to-70. The effect of increasing rudder deflection was generated by the flow around it and inflows moved over the rudder. This deflection effect continued to X/D=0.4; afterwards, a zero velocity appeared because of the flow encountered by the stagnation region.
Design and Simulation of Servo System of Based on Kalman Filter
Authors: Tao Min , Wang Xin Rong , Zhang Gui Ping
Published: September 2013

In order to enhance metrical precision of radar on the vessel, Kalman filter based on Singer model is designed to filter angle-error signals in servo system of the radar in this paper. Precision of angle-error signal in the servo system is a key factor influencing precision of tracking and control. But it inevitably corrupted by external disturbances and internal noise during transmission and detection. Kalman filter, which is a kind of linear minimum variance estimation, can estimate state vector at any time when a parameter variable changing with time (state vector) and a linear model (system model) are provided. Therefore, its extremely suitable for filtering the angle-error signals in servo system. Experiments on practical signal show that Kalman filter can reduce noise of the angle-error signals effectively and hence enhancing metrical precision of the radar.
Finite Element Analysis and Experiment Research on Machine Tool Cutting Force Error
Authors: Zhang Xin , Ding Xiao Rui , Yang Hong Tao , Xia Qiu
Published: September 2013

Cutting force is the major factor which causes machine tool geometric error, for the sake of finding the relationship between cutting force and the machine tool geometric error, this paper established a model to simulate and analysis, Mastered the situation of stress distribution of various points on the machine and the regularity of internal stress and strain distribution; designed experiments for the precise measurement, and obtained the actual data of machine geometric error. the data matches the results of the simulative analysis. the results has a certain referential value to optimize the design of machine tool, the geometric error modeling and make the realization of software compensation, etc.
Design of Pitch Curve of Internal-Curved Planet Gear Pump Strain in Type N-G-W Based on Three-Order Ellipse
Authors: Wang Chao , Luan Zhen Hui , Gao Wei Peng
Published: September 2013

In N-G-W type non-circular planetary gear strain, the planetary gear is meshed both with the center wheel and the inner gear ring. The parameters which the design of the planetary wheel system required can be received according to the three-order elliptic equation which consist of continuous smooth closed curves as the pitch curve equation of the center wheel, and on the basis of planetary gear teeths relation, the closed condition of the pitch curve and the teeth uniformly distributed in the curve. This paper studied the design process of the pitch curve on an N-G-W type internal-curve planet gear pump by a practical example.
Exploration of Specialty Talents Training Program for Measuring and Control Technology and Instrumentation with the Core Features of Detection Technology
Authors: Yu Yang , Sang Hai Feng , Jia Dan Ping
Published: September 2013

Eleven instrumentations professional was integrated to measuring & control technology and instrumentation specialties in 1998, and its professional connotation is widely. During the elite education transformation to mass education, how to change education idea and cultivating talents are the most important. Discipline superiority had been fully utilized to outstanding "pipeline inner detection technology "and "visual inspection technology" characteristic and the detection technology was used as the core features. A series of reforms has been processing from course system refined to the specialty profession construction and students' practical ability training in order to form the professional characteristics.
Seepage Stability Analysis for Surrounding Rock Mass of Diversion Tunnel by FEM
Authors: Xu Yun Feng , Shen Zhen Zhong , Shao Chao Xin
Published: September 2013

Based on the actual conditions of the project and related experience, the seepage model of diversion tunnel and its surrounding rock mass was built to analyze its seepage stability. The seepage field was calculated by using finite element method (FEM) and cut-off negative pressure method. Two typical cross-sections and working conditions were chosen to evaluate the seepage stability of the surrounding rock mass. According to the results, the seepage gradient is larger when one tunnel is filled with water while the other is empty. The maximum seepage gradient is less than the allowable seepage gradient, so the surrounding rock mass of the diversion tunnel can meet the demand of seepage stability.
The Temperature Field Distribution in Thermal Recovery and the Study on Residual Oil Distribution Laws
Authors: Li Bo , Zhang Hao , Liu Anan , Wei Hua Bin , Du Xue , Zhang Liang
Published: September 2013

Western Bei II Area in Saertu Oilfield, Daqing Oilfield is the test area. It has now entered an exploitation phase of extra high water cut stage. Under the circumstance of a long time of development and complex conditions of well history in this area, it has experienced water flooding, polymer flooding and thermal recovery. Based on basic geological characteristics in the test area, this study establishes three-dimensional geological static models and conducts the fine reservoir numerical simulation of the test area. In addition, it summarizes the temperature field distribution features before and after the thermal recovery as well as causes and distribution laws of the residual oil, which provides a reliable basis for development, deployment and measures to adjust in the next step in oilfields.
The Types of Sedimentary Facies and Rock Characteristics of Xujiaweizi Fault Depression in Songliao Basin
Authors: Liu Cheng Zhi , Du Xue , Zhou Xiao , Li Bo , Liu Xi
Published: September 2013

In the Shahezi Formation of Xujiaweizi fault depression in the Songliao Basin mainly tow sedimentary system is developed: the Xudong gentle slope belt and Xuxi fault zone systems. However, this area is little studied as there have been only limited efforts in exploration. Based on the latest drilling, outcrop data, description of core observation and laboratory microscope identification, it has been concluded that four mainly sedimentary facies are developed in this area: braided river delta, fan delta, lacustrine facies and sublacustrine fan. The subaqueous distribute channel is the main type of the fan delta front while the braided channel is the main type of the braided river delta. A number of clastic, sandstone and mudstone are developed in these two types of sedimentary facies. We can use it to make further study of dividing into micro-facies.
Analysis and Research of Luo River Inverted Siphon Structure
Authors: Ji Dong Yu
Published: September 2013

This paper adopts general finite element software to analyse Luo River bridge-type inverted siphon structure, researching variation law of the inverted siphons stress and displacement in construction process and operational process. Research results further verified rationality and security of the design scheme, which provides reliable reference for construction and operational of inverted siphon structure.
An Inproved GA and its Application to DRP
Authors: Wang De Ji , Lian Jie , Xie Jun Ming
Published: September 2013

To avoid local convergence and slow convergence of GA, SVM was used to get the fitness function in this paper and Statistical Learning Theory was used to guide the optimization process. Then, the improved GA was applied to Optimizing Cigarette Logistic Distribution Routing Problem, and the result proved that the algorithm was efficient in convergence.
Fault Location Based on Artificial Bee Colony Algorithm for Distribution Network with Distributed Generators
Authors: Zeng Hong Mei , Peng Min Fang , Zhu Liang , Che Hong Wei , Du Xin , Yi Zhi Peng , He Jian Biao
Published: September 2013

The access of distributed generators makes distribution network change into a multi-source network with two-way flowing trend and so accurate fault location is becoming more complicated. This paper proposes a new method which applies an artificial bee colony algorithm (ABC) for fault location of distribution network with distributed generators. To reveal the validity of the ABC algorithm, sample distribution systems are examined with different test cases, which includes single fault, multiple fault, information distortion and loss. The outcomes verify that utilizing artificial bee colony algorithm to solving the fault location problem of distribution network including distributed generators has good fault tolerance and stability. Besides, the algorithm possesses a competitive advantage of simple parameters setting.
T-S Fuzzy Model Establishment and Control of Discrete Chaotic System
Authors: Yang Zhi Hong
Published: September 2013

The problem of fuzzy sliding mode control of discrete chaotic system is studied. Discrete chaotic system is described based on T-S fuzzy models, and the system is translated into local linear model by fuzzy method. On the basis of Lyapunov stability theorem and approaching law method, a novel sliding mode controller is designed in the paper. The controller insures the stability of global fuzzy model. The controlled certain and uncertain Henon systems are simulated with Matlab, and the numerical results demonstrate the validity and robustness of the control scheme.