bluuebunny/crossref_metadata_2025 huggingface dataset:
Effect of Water Content on Structural and Photoelectrochemical Properties of Titania Nanotube Synthesized in Fluoride Ethylene Glycol Electrolyte
Authors: Lim Yingchin , Zainal Zulkarnain , Hussein Mohd Zobir , Tan Weetee
Published: April 2012

In this work, the effect of water content from < 1 to 100 vol% on the electrochemical anodization of titanium in ethylene glycol-based electrolyte was investigated. The samples were characterized using X-ray diffraction (XRD) and their dimensional change was monitored by field emission scanning electron microscopy (FE-SEM). It was found that the microstructure and morphology of TiO2 varies dramatically with the water content. Nanotubes become less ordered with increasing water content up to 50 vol%. At 75 vol% water, only porous structure could be observed. Most importantly, at fixed applied voltage, smoother but relatively longer tubes can be grown with lower water content. Varying water content has no effect on the crystalline phase of the resulted nanotubes. However, the intensity of anatase (101) peak increases with increasing water content, indicating better crystallinity of samples. Nanotubes obtained in 50 vol% water exhibit the highest photoresponse when tested using linear sweep photovoltammetry due to enhanced microstructure and crystallinity.
Effect of Rapid Thermal Annealing Time on the Structural and Optical Properties of Layered Structured SiOx/Au/SiOx Film
Authors: Najwa Rosli , Chan Kee Wah , Ilyani Putri Jamal , Saadah Abdul Rahman , Goh Boon Tong , Aspanut Zarina
Published: April 2012

In this work, layer structured silicon suboxide/gold/silicon suboxide (SiOx/Au/SiOx) films were prepared by using plasma enhanced chemical vapor deposition assisted with hot wire evaporation technique. Post rapid thermal annealing (RTA) process was done on the as-prepared films for 100, 500 and 700s at constant temperature of 800oC in vacuum ambient. Effects of RTA process on the structural and morphological properties of films were studied using FE-SEM, depth profiling and XRD measurement. While, surface plasmon resonance (SPR) phenomenon exhibited by Au particles was investigated via the optical absorption spectra. SPR signals can be exhibited by sample annealed for longer time duration. Individual Au islands tend to form the spherical shape as a whole. Diffusion of Au particles towards the surface of SiOx film is temperature dependent and crystallite size of Au enlarges with the rapid thermal annealing time.
Effect of Annealing temperature on the Structural and Magnetic Properties of TbxY3-xFe5O12(x = 0.0, 1.0, 2.0) Thin Films Prepared by Sol-Gel Process
Authors: Aldbea Ftema W. , Ibrahim Noor Bahyah , Abdullah Mustafa Hj. , Shaiboub Ramadan E.
Published: April 2012

Thin films nanoparticles TbxY3-xFe5O12 (x=0.0, 1.0, 2.0) were prepared by the sol-gel process followed by annealing process at various annealing temperatures of 700° C, 800° C and 900° C in air for 2 h. The results obtained from X-ray diffractometer (XRD) show that the films annealed below 900°C exhibit peaks of garnet mixed with small amounts of YFeO3 and Fe2O3. Pure garnet phase has been detected in the films annealed at 900°C. Before annealing the films show amorphous structures. The particles sizes measurement using the field emission scanning electron microscope (FE-SEM) showed that the particles sizes increased as the annealing temperature increased. The magnetic properties were measured at room temperature using the vibrating sample magnetometer (VSM). The saturation magnetization (Ms) of the films also increased with the annealing temperature. However, different behavior of coercivity (Hc) has been observed as the annealing temperature was increased.
Synthesis and Characterization of Carboxymethyl κ-Carrageenan for Dye-Sensitized Solar Cells Application
Authors: Mobarak N. N. , Ramli Nazaruddin , Ahmad Azizan
Published: April 2012

κ-Carrageenan is an anionic polymer extracted from marine red algae. In order to increase conductivity of the κ-carrageenan, carboxymethyl κ-carrageenan was synthesized by the reaction of κ-carrageenan with monochloroacetic acid. A polymer electrolyte comprising κ-carrageenan and carboxymethyl κ-carrageenan was prepared by solution-casting technique. The films were characterized by Reflection Fourier Transform Infrared spectroscopy (ATR-FTIR) to investigate the presence of the complexes. Electrochemical Impedance Spectroscopy was conducted to obtain ionic conductivity. Ionic conductivity was found to increase with the addition of carboxymethyl group on carrageenan. The conductivity achieved for κ-carrageenan and carboxymethyl κ-carrageenan were 5.34×10-7 S cm−1 and 2.02×10−4 S cm-1, respectively.
Effect of Electric Field Treatment on the Performance of Organic Salt Doped Solar Cell
Authors: Syamin Nasehah , Yap Chi Chin , Yahaya Muhammad , Salleh Muhamad Mat
Published: April 2012

High efficiency is one of the characteristics of a good solar cell. The objective of the experiment is to investigate the effect of electric field treatment on the performance of organic salt tetrabutylammonium hexafluorophosphate (TBAPF6) doped solar cell with ITO/MEHPPV:PCBM/Al structure where indium tin oxide (ITO) was used as anode, poly[2-methoxy-5-(2-ethylhexyloxy)-1,4-phenylenevinylene] (MEHPPV) as donor, (6,6)-phenyl-C61 butyric acid methyl ester (PCBM) as acceptor and aluminium (Al) as cathode. The devices were build by depositing 20 % of TBAPF6 (weight percentage with respect to MEHPPV) doped MEHPPV:PCBM thin film onto the ITO by spin coating technique, and followed by deposition of Al by using electron gun evaporation technique. The performance of the devices was analyzed through the current-voltage (I-V) curve under illumination with a solar simulator at 100 mW/cm2. Electric field treatment was given by applying different constant voltages of 6 V, 8 V and 10 V for 60 s to the devices before the I-V characterization. A device without electric field treatment was also investigated for comparison. The efficiency of the devices increased with constant voltage given and reached an optimum value at treated voltage of 8 V. The optimum device exhibited the highest efficiency of 0.16% with short circuit current density of 0.88 mA/cm2, open circuit voltage of 0.60 V and fill factor of 30%.
Surface Morphology of Metal Oxide SnO2 under Different Concentrations of Oxygen by Thermal Evaporation Method
Authors: Fatimah Hasim Siti Nuurul , Hamid Muhammad Azmi Abdul , Shamsudin Roslinda , Radiman Shahidan , Jalar Azman
Published: April 2012

SnO2 has been successfully grown on Si substrate using a thermal evaporation method, under different percentages of argon and oxygen gases. High purity Sn metal was used as reactants with deposition temperature were set at 900°C. Different oxygen concentrations range between 1.6 and 10% were used during thermal evaporation process. The as-prepared metal oxides were analyzed using SEM-EDS, XRD and UV-VIS. SnO2 nanowhiskers were obtained at lower oxygen concentrations (1.6 to 6% oxygen), while nanowires structures were formed at higher oxygen percentages. XRD results revealed SnO2 produced were highly crystalline and no other impurity phase diffraction peaks were detected. EDS analysis revealed that only Sn and O elements were present in the sample which are consistent with XRD results. UV-VIS result revealed that the optical band gap energy of the metal oxides produced have low significant effect with increasing oxygen concentration. Optical band gap energy for was within 3.3 eV, which was lower than the optical band gap energy of bulk SnO2.
Ionic Conductivity of PVDF-HFP/MG49 Based Solid Polymer Electrolyte
Authors: Ataollahi Narges , Ahmad Azizan , Hamzah H. , Rahman M.Y.A. , Nor Sabirin Mohamed
Published: April 2012

Blend-based polymer electrolytes composed of PVDF-HFP/MG-49 (70/30) and LiClO4 as lithium salt has been studied. Solution casting method was applied to prepare the polymer electrolyte. Electrochemical impedance spectroscopy (EIS) and Fourier transform infrared spectroscopy (FTIR) were used to characterize the electrolyte films. The maximum value of 2.51×10ˉ6 S cm-1 was obtained at ambient temperature for the 30 wt. % of LiClO4 and the conductivity increased to 1.10×10ˉ3 S cm-1 by increasing the temperature up to 383 K. FTIR spectra demonstrated that complexation occurred between the polymers and lithium salt.
Effects of Fe3O4 Nano Particles Addition in High Temperature Superconductor YBa2Cu3O7-δ
Authors: Abd-Ghani Siti Nurdalila , Abd-Shukor Roslan , Kong Wei
Published: April 2012

The effects of nano particles Fe3O4 addition on the superconducting and transport properties of YBa2Cu3O7-δ (YBCO) were studied. YBa2Cu3O7-δ superconductor powders were prepared by using high purity oxide powders via solid state reaction method. Nano Fe3O4 with 0.01 – 0.05 wt.% with average size 28 nm was added into YBCO. The transition temperatures (Tc) of the samples were measured by using four point probe method. The critical current (Ic) of the samples has been determined by using the 1 μV/cm criterion from 30 – 77 K. Sample with 0.02 wt.% nano Fe3O4 showed the highest Tc at 87 K. It is interesting to note the same sample also exhibited the highest Jc at 77 K up to 1683 mA/cm2. Nano Fe3O4 has acted as effective flux pinning centers in YBCO. A small amount of nano particles Fe3O4 addition has successfully improved the superconducting and transport properties of YBCO. The excessive addition of nano Fe3O4 (> 0.02 wt.%) suppressed the Tc and Jc. Overall, Jc decreases with increasing temperature (30 – 77 K) as a consequence of thermally activated flux creep. Magnetic impurities normally suppress superconductivity. However, by adding magnetic nano particles, current carrying capacity of superconductors YBCO was enhanced significantly.
Effect of (La0.67Ca0.33MnO3)x (x = 0.0 – 0.6) Addition in YBa2Cu3O7-δ System on the Structure and Transport Properties
Authors: Fadilah B.N. , Halim S.A. , Hashim M.
Published: April 2012

The effect of LCMO addition in YBCO system to investigate changes in structure and transport properties is reported. Samples with addition of (La0.67Ca0.33MnO3)x (LCMO) (x=0.0-0.6) in YBa2Cu3O7-δ(YBCO) superconducting system were prepared via solid state reaction. The effect of magneto resistive components on the superconducting properties of YBCO was investigated through X-Ray diffraction (XRD), resistance-temperature (R-T) measurement, and Scanning Electron Microscope (SEM). XRD analysis showed the addition of LCMO (0.2 wt% - 0.6 wt%) formed four new phases. The crystal system still orthorhombic with space group Pmmm after addition 0.2 wt% and 0.4 wt% of LCMO but the crystal system was changed to tetragonal and space group P4/mmm when addition with 0.6 wt% of LCMO. The temperature dependent of electrical resistance showed the samples were metallic above the transition temperature even though after addition. TheTc(onset)superconducting transition temperature decreased from 84 K to 66 K while theTc (offset)decreased from 72°C to 54°C. This suppression was due to the magnetic behaviour of the LCMO. The average grain size decreased when addition with LCMO were increased.
Effect of Salt Concentration and Humidity on the Ionic Conductivity of Poly(Vinylidene Fluoride–Hexafluoropropylene) (PVdF-HFP)
Authors: Alias Ahmad Nazib , Kudin Tengku Ishak Tengku , Zabidi Zubainun Mohamed , Harun Mohamad Kamal , Yahya M.Z.A.
Published: April 2012

Polymer electrolytes consist of poly(vinylidene fluoride –hexafluoropropylene) (PVDF-HFP) and lithium trifluoromethanesulfonate, LiTf (LiCF3SO3) were prepared by dissolving in dimethylformamide (DMF) using solution casting method and further dried in vacuum oven. The conductivity of each sample was investigated using electrochemical impedance spectroscopy (EIS) method. The samples were measured in two different environments viz. in humidity chamber (40% RH; 27°C) and at ambient condition (~60% RH; 27°C). The maximum conductivity obtained for the samples in humidity chamber was 8.05 × 10-5 S/cm with addition of 35 wt% of LiTf. Meanwhile, the highest conducting samples (with addition of 45 wt% of LiTf) exhibited the ambient condition temperature of 1.11 ×10-4 S/cm. Further increased salt concentration from the optimize concentration values has reduced the conductivity of the polymer electrolyte. Dielectric permittivity studies revealed that samples showed the non-Debye behaviors
Structural Study of Antimony Borate Glass System Doped with Transition Metal Ions Using Infrared and Raman Spectroscopy
Authors: Yew Eeu Tien , Hua Wan Ming , Wong Poh Sum , Mat Jan Nur Amanina , Ibrahim Zuhairi , Hussin Rosli
Published: April 2012

A series of Antimony Borate glass samples were investigated to determine the structural feature. The glass samples from the series of xSb2O3:(1-x)B2O3 with composition of 20≤x≤60 mol% and 0.6 Sb2O3:0.4B2O3:y with y is 0.01 mol% of Nb2O5, CuO, ZnO system have been prepared using melt-quenching technique. The structural properties of Sb2O3 host and the introduction of dopents onto the host sample has been investigated using Infrared and RAMAN Spectroscopy. The result of IR and Raman Spectroscopy revealed that the network structure of the studied glasses is mainly based on BO3 and BO4 units placed in different structural groups, the BO3 units being dominant. IR spectra obtained shows conversion of BO3 to BO4 units upon the introduction of Sb2O3 commonly known as boron anomaly effect. The glass network can be modified with the presence of Sb2O3 and activator ions. The significant behavior in Raman Spectra indicates the presence of boroxol groups consisting of pure BO3 groups and mixed BO3-BO4 structural units. This study shows that the vibrational spectroscopy (Infrared and Raman) provide useful method, and inter-complementary information about the structural properties of antimony modified borate glasses.
A Model for Enhanced Up-Conversion Luminescence in Erbium-Doped Tellurite Glass Containing Silver Nanoparticles
Authors: Ghoshal Sib Krishna , Sahar M. Rahim , Dousti M. Reza , Arifin Ramli , Rohani M. Supar , Hamzah Khaidzirh
Published: April 2012

Nanoparticles (NPs) size dependent enhancement of the infrared-to-visible frequency up-conversion (UC) and absorption coefficient in silver NPs embedded Er3+ doped tellurite glasses on pumping with the 976 nm radiation are investigated. Rate equations are derived by developing a comprehensive 4-level model in integrating the effects of quantum confinement and local field of silver NPs. Considering the spherical NPs size distribution as Gaussian, an analytical expression for the luminescence intensity and absorption coefficient are obtained for the first time. An enhancement in UC emission intensity of the green bands (2H11/2→4I15/2 and 4S3/2→4I15/2) and red band (4F9/2→4I15/2) emission of Er3+ ion at temperature 250 K and at optimized Er3+ concentration 1.0 mol% is observed up to few times in the presence of silver NPs. Furthermore, the green emission shows larger enhancement than the red emission. The observed of Er3+ luminescence is mainly attributed to the local field effects namely the surface plasmon resonance of silver NPs that causes an intensified electromagnetic field around NPs, resulting in enhanced optical transitions of Er3+ ions in the vicinity. The model is quite general and can be applied to other rare earth doped glasses containing metallic NPs. Our results on NPs size dependent emission intensity and absorption coefficient are in conformity with other findings. The present systematic study provides useful information for further development of UC lasers and sensors.
Structural and Electrical Transport Properties of La0.67Ba0.33Mn1-yTiyO3 Ceramics
Authors: Zalita Zainuddin , Halim Shaari Abdul
Published: April 2012

The structural and electrical transport properties of La0.67Ba0.33Mn1-yTiyO3 manganite, with y = 0.00, 0.05, 0.10, 0.15, 0.20, 0.40 and 0.60, prepared using the solid state reaction technique have been investigated. The X-ray diffraction spectra of the Ti substituted samples showed the formation of single phase compound with Pm3m cubic structure except for the y = 0.60 sample, which showed La2Ti2O7 phase formation. Lattice parameter increased with Ti content and then decreased at y = 0.60. Resistivity versus temperature study showed that only samples with y = 0.05 and 0.10 exhibited both metallic and semiconductor-like behaviour with the metal-insulator transition temperature, Tp of 167 K and 43 K, respectively. At higher Ti concentration the samples only showed the semiconducting behaviour. At T < Tp the resistivity curves followed the ρ = ρo1 + ρ1T2 relation and for T > Tp, the curves can be fitted with the nearest neighbour hopping (NNH), variable range hopping (VRH) or/and the small polaron hopping (SPH) models.
Influence of Substrate Temperature on the Characteristics of Zinc Oxide Thin Films Deposited by Magnetron Sputtering
Authors: Gu J.H. , Zhong Z.Y. , He X. , Hou J. , Yang C.Y.
Published: April 2012

Zinc oxide (ZnO) thin films were deposited by RF magnetron sputtering on glass substrates employing a sintered ceramic target and pure argon gas. The influence of substrate temperature on microstructure and optical characteristics of the deposited films were investigated by X-ray diffractometer (XRD) and spectrophotometer. The results demonstrate that all the ZnO films have preferred orientation along (002) direction. The substrate temperature significantly affects the crystalline quality and optical characteristics of the ZnO thin films. With the increase of substrate temperature, the mean grain size, lattice spacing and optical bandgap of the films increase, the dislocation density and micro strain decrease, and the average transmitance in the wavelength range of the visible spectrum also increases.
The Research on the Relationship between Cauchy Integral Theorem and Complex Function Integral in Mechanics of Materials
Authors: Sun Xing Rong
Published: April 2012

This paper is the Cauchy integral theorem and integral of complex function carried out a comparative analysis, summarized in the Cauchy integral theorem and Cauchy integral formula, higher-order derivative formula, residue theorem and the relationship between the derivations to be proved, the formula can be used in these areas, such as mechanics of materials.
Cauchy Integral Formula on the Integration Path C on Singularity in Mechanics of Materials
Authors: Cao Xue Feng
Published: April 2012

This paper is a combination of conditions and the knowledge of singular integrals, the integrand function analysis of the deformation, the singularity in the integral for a class on the path integral come up with a complex new formula for the solution,the formula can be used in these areas,such as mechanics of materials.
Downconversion for Solar Cells in Sr3Gd(PO4)3:Tb, Yb Phosphors
Authors: Sun Jia Yue , Sun Yi Ning , Zhu Ji Cheng , Zeng Jun Hui , Du Hai Yan
Published: April 2012

An efficient near-infrared (NIR) quantum cutting (QC) Tb3+ and Yb3+ co-doped phosphor Sr3Gd(PO4)3 has been synthesized by conventional high temperature solid technique. Upon excitation of Tb3+ with a visible photon at 485 nm, two NIR photons could be emitted by Yb3+ through cooperative energy transfer (CTE) from Tb3+ to two Yb3+ ions. Excitation and emission spectra as well as ﬂuorescence decay measurements have been carried out to examine the occurrence of cooperative energy transfer (CET ) from Tb3+ to Yb3+ ions. The result indicates Tb3+ and Yb3+ co-doped Sr3Gd(PO4)3 is potentially used as down-converter layer in silicon-based solar cell.
Bearing Capacity of Concrete Filled Square Steel Tubular Columns Based on Neural Network
Authors: Wang Hai Jun , Zhu Hua Bei , Wei Hua
Published: April 2012

Steel tube and filled concrete of square CFT (concrete filled steel tubular structures) columns under eccentric load are in complicated stress condition, the influence of every kind of factors on mechanics performance is difficult to ascertain accurately. On the other hand, neural network is good at obtaining the relationship between input and output variables by self-studying, self-organizing, self-adapting and nonlinear mapping. Therefore, it is suitable that use neural network to calculating the bearing capacity of square CFT columns. In this paper a four-layer back-propagation model of network is trained according to experimental data of square CFT columns under eccentric load, a neural network model for eccentrically loaded square CFT columns is set up. The model is verified by six groups of experimental data, the results show the predicted values are in good agreement with test values, precision in calculation is good enough to be used as an auxiliary method for structure design.
Numerical Simulation of the Effects of Scanning Velocity on the Process of Laser Transformation Hardening on the Inner Wall of Pump Barrel
Authors: Zhang Zhe , Han Bin , Wang Yong , Wang Nan Nan
Published: April 2012

This study establishes a 3-D finite element model for the numerical simulation of laser transformation hardening on inner wall of pump barrel through a finite element code-SYSWELD. The change of thermal mechanical parameters with temperature is considered. The temperature field, metallurgy transformation and distribution of residual stress are predicted. The effect of scanning velocity on the temperature, martensite fraction and distribution of residual stress are studied. The results show that peak temperature in the hardened zone reaches to 1067.0°C and the maximum heating and cooling rate of hardened zone are 1.24×104°C/s and 3.68×103°C/s. After treatment, martensite can be obtained as a main phase in the hardened zone whose fraction increases with the decrease of scanning velocity. Compressive stress could be acquired in the hardened zone while the peak of tensile stress exists in the HAZ.
Conductivity of PANI-PVA Composite Conductive Coatings with the Doping of Different Acid
Authors: Wang Xiao Hua
Published: April 2012

The PANI-PVA composite conductive coatings adopt PVA as the base material together with the doping of hydrochloride (HCl), dodecylbenzenesulfonic acid (DBSA), the aminosulfonic acid (NH2SO3H ) aqueous solution were prepared. The influences of PVA content, acid content, oxidant content, reaction time and drying temperature of film on the conductivity of coating film were studied. The result shows that the conductivity of HCl-PANI-PVA coating film is the highest among them in case the PVA content is 40% and the drying temperature of film is 80°C. The maximum conductivity of HCl-PANI-PVA coating film is 15.0S/cm in case the C(HC1)=0.5mol/L, the reaction time is 6 hours and the n(APS/An)=1.0; the maximum conductivity of DBSA-PANI-PVA coating film is 7.1S/cm in case the C(DBSA)=1.0mol/L, the reaction time is 8 hours and the n(APS/An)=2.0; the maximum conductivity of NH2SO3H-PANI-PVA coating film is 2.0 S/cm in case the C(NH2SO3H)=1.0mol/L, the reaction time is 6 hours and the n(APS/An)=2.0.
Effect of Hot-Band Annealing on the Microstructure of Non-Oriented Electrical Steel Containing Copper
Authors: Nan Di , Zeng Yan Ping , Cui Hui Jie , Zhou Zi Yu
Published: April 2012

The grain sizes and precipitates in hot-rolled bands of the non-oriented electrical steel containing Cu were quantitatively studied while the effect of hot-band annealing on microstructure was evaluated by hot-band annealing at different temperatures. The average sizes of recrystallized grains after coiling at 650°C are in the range of 24~29μm. After hot-band annealing at 850°C for 1h, grains coarsened dramatically. The volume fractions of precipitates in hot-rolled bands after coiling at 650°C for different time are 15~18%. After hot-band annealing, precipitates coarsened and distributed sparsely, and the volume fraction of them decreased to less than 10%.
An Experiment on the Surface Stability of a Liquid Bridge
Authors: Liang Ru Quan , Ji Jun Hong , Yan Fu Sheng , Masahiro Kawaji
Published: April 2012

A liquid bridge formed between two coaxial, circular, solid disks was vibrated to study the effects of small vibrations on the stability of a free surface of the liquid bridge. The liquid bridge was vibrated by tapping its upper disk and by using a motor placed nearby. Experiments were conducted for isothermal liquid bridges of silicone oil (5 cSt) with a disk diameter of 7.0 mm. By subjecting the liquid bridge to small vibrations, the characteristics of vibration-induced surface oscillation have been clearly determined.
Fabrication and Ultraviolet Detection Properties of Zinc Oxide by Oxidizing Metallic Zinc at High Temperature
Authors: Shang Shi Guang , Xu Ke Wei , Zhao Ling , He Feng Tao
Published: April 2012

Zinc oxide (ZnO) nanocrystalline with different morphologies, used in ultraviolet (UV) light detection, was successfully fabricated by directly oxidizing metallic zinc at high temperature. X-ray diffraction spectra show that the as-prepared samples are hexagonal wurtzite structure. Scanning electron microscopy images indicate that ZnO with different morphologies such as comb-like, tetrapod and bullet structures could be controlled by simply variables like gas flow rate, ambient pressure and growth temperature. The Photoluminescence (PL) spectra were employed to reveal native point defects in ZnO nanocrystalline. The UV detection properties of ZnO nanocrystalline films screen-printed on interdigital electrodes were investigated by observing the changes of capacitance and conductance under different light sources. The results indicate that the comb-like ZnO nanocrystalline has high UV sensitivity.
Influence of Structure Parameters on Moisture Permeability of Fabric Woven by Fine PP Fiber with Star Section
Authors: Jin Guan Xiu , Zhu Cheng Yan
Published: April 2012

To study the influence of structure parameters on moisture permeability of fabric woven by fine pp fiber with star section, nine fabrics with different structure and tightness had been woven for experiment, and a moisture permeability test with moisture absorbtion method was performed and compared for these fabrics. Some conclusions are obtained: the moisture permeability showed direct correlation with fabric texture and tightness. It will be improved as the the float of weave get longer. Moreover it will decline with the increasing of fabric tightness and showed significant correlation with Polynomial function when the results fitted with it.
Research on Reliability Evaluation Method of Casing in High Level Acid Gas Field
Authors: Wang Guang Lei , Li Wen Fei , Zeng Qiang Shen , Jiang Lan Qi
Published: April 2012

PuGuang gas field is an acid gas field because of its high level of H2S and CO2, so it is important to evaluate its reliability of casing to make sure the safe exploiting. Based on the analysis of casing load mechanism, calculation model is researched. According to reliability theory, regard the casing as a series system, and consider the failure types of casing in acid gas field, reliability model of casing parts and whole are proposed. The analysis results show that reliability of whole casing of P101-2H well is 100% in the early days of exploitation, and casing design is right. Because some factors including corrosion, perforating and so on decreased the strength of casing, reliability of whole casing is decreased after 10 and 20 years.
Long-Term Protection Effects of Electrochemical Chloride Removal on Reinforced Concretes
Authors: Li Sen Lin , Fan Wei Guo , Xu Ning , Cai Wei Cheng
Published: April 2012

From the visual condition, steel corrosion status, chloride content,concrete strength and other aspects, reinforecd concrete structures after electrochemical chloride extraction treatment nearly 10 years were surveyed and detected, and the results showed that the structure surface had a good appearance and no obvious deterioration,the content of chloride ions in concrete was low, the content of chloride ions around rebar areas was far lower than the critical value,the rebar remained in fully passive condition, the electrochemical chloride extraction treatment had no significant influence on the concrete strength, the seal coat on the structure surface was relative complete, but the aging phenomenon such as color alteration, adhesion strength reduction etc. was found on the surface, except for some discoloration and reduced adhesion strength.
Electrical Insulation Property of Silicone Rubber Tube in High Elevations
Authors: Li Guo Min , Li Chuan , Xu Yun Shui , Yan Qing Hua , Zhang Shao Quan , Chen Yan , Xu Xiao Ping , Xu Jiang Chun , Li Ying Na
Published: April 2012

Silicone rubber is a polymer with the chain molecule structure of Si-O bond [1]. At the environment of 1970 m elevation, the power frequency withstand voltage and condensation experiments will be tested by using two silicone rubber tubes with length of 300mm and 330mm, which lasts one minute, under 85kV. In the high potential test, the silicone rubber tube does not appear the flashover when the surface of tubes weren’t polluted. However, the test voltage increases to 70kV and the surface of the silicone rubber tube will appear flashover, when the tubes are plated in the condensation conditions. The high potential experiments indicate that the electrical insulation property of silicone rubber tube is seriously debated in the humidity environment.
Research about the Wearability of Coconut Carbon Fiber Knitted Fabric
Authors: Guo Meng Meng , Meng Jia Guang , Han Ya Hong
Published: April 2012

This article focuses on the performance test of coconut carbon fiber knitted fabric, like air permeability, moisture permeability, thermal insulation, fastness and deodorant, release negative ions, etc. use the fuzzy comprehensive evaluation method to analyze and evaluate the coconut carbon fiber knitted fabric.
Research of Embedded Precision Internal Grinding Flexible Open CNC System
Authors: Xie Ou , Lu Cong Xiang , Wu Yong Zhi
Published: April 2012

According to the processing and control requirements of the precision internal grinding, a type of components based embedded precision internal grinding flexible open CNC system was proposed and implemented in this paper. The decoupling design techniques were used for system soft-hardware decoupling package design, which reduced the coupling factors between the system soft-hardware. The system software configuration was given, achieving the open design of the embedded precision internal grinding CNC system.
The Forward Kinematics Solution of Track Irregularity Simulator
Authors: Cao Xiao Ning , Liu Yu Mei , Lai Zheng Jian , Guo Wen Cui , Sun Chao
Published: April 2012

By means of the bionic optimization method PSO, the particle swarm displacement tracking model was established by this paper according to the displacement constraint conditions of the track irregularity simulator actuators, which took the difference between the given length of the forward kinematics solution and the inverse kinematics solution as the optimization objective. The population global searching and optimization was carried out through the PSO toolbox based on matlab and the compiling optimization function procedure, in order to realize the dynamic tracking of the position parameters and the forward kinematics solution of the 6-Dof loading platform. The accuracy of forward kinematics solution model and the PSO procedure discussed in this paper was proved by the example.
Studies on Properties of the Coconut Carbon Fiber and Yarn
Authors: Meng Jia Guang , Guo Meng Meng , Han Ya Hong
Published: April 2012

A new health care fiber-coconut carbon fiber, and yarn use coconut carbon fiber and cotton blended into are introduced in this paper. And a series of performance testing and analysis about scanning electron microscopy, infrared spectrum, strength, hairiness, moisture content and acid and alkali resistance are done to the carbon fiber and coconut yam.
Optimization Design on the Processing Technic of Shot Blasting Machine Fender Apron
Authors: Wang Xue Zheng , Song Xiao Rui
Published: April 2012

According to the use, design and research of shot blasting machine equipment for years, combined with the company's actual production, the processing technology of fender has been optimized is the wearing part of shot blasting machine in the casting room, the service life of fender have more than doubled in the original ones by the actual use proof, greatly reducing the replacement frequency of fender for the company to save a lot of money.
Influence of Crosswind to Automobile Interior Aerodynamic Noise
Authors: He Yin Zhi , Yang Zhi Gang
Published: April 2012

After a brief introduction about aerodynamic noise generation and transmission mechanisms, the influence of crosswind to vehicle interior aerodynamic noise for a production automobile sedan was investigated through full-scale aeroacoustic wind tunnel tests. Through analysis of sound pressure level of vehicle interior driver ear position and pressure fluctuation level on vehicle side window glass under different yaw angles, the following results are obtained: The frequency characteristics of vehicle interior aerodynamic noise vary as yaw angle changes under one certain wind speed. Whether on the leeside or by windward, sound pressure level increases as yaw angle goes up. Under the same yaw angle, interior noise level on the leeside is higher than that by windward. Test results between pressure fluctuation level on side window glass and vehicle interior aerodynamic noise of driver ear position show good correlation
Burst Strength Prediction of OCTG
Authors: Sun Yong Xing , Lin Yuan Hua , Yi Bing Gang , Han Lie Xiang , Yang Xiao Feng
Published: April 2012

With high pressure high temperature (HPHT) oil & gas wells increasing, oil country tubular goods (OCTG) service environment tends to be critical complex. In these critical oil & gas wells, when burst failures of high strength service grades for downhole applications once take place, the H2S gas may be run freely between tubing and intermediate casing, intermediate casing and surface casing, even the sulfur-containing gases spring ground, the harm is self-evident. Therefore, an accurate prediction of the burst strength, which is defined as the maximum value of internal pressure required to cause the steel casing to fail, is a very important consideration in the casing design process. The burst model has been provided in ISO/TR10400:2007, but almost half of the predictionts exceed the test burst strength. So this paper develops a new model that incorporates the influence of yield-to-tensile strength ratio on burst failure of casing and tubing without defects.
Coupled Inductor Design of Contactless Power Transfer System
Authors: Gao Song
Published: April 2012

Paper introduces a high-frequency electromagnetic induction coupling principle to achieve contactless power transfer system, and analyzes the role of the coupled inductor coil in the system. By studying a variety of coupled inductor coil winding mode coupling theory, comparing the receiver coil movable range and the coil geometry size, this paper analyzes the pros and cons of the various coil mode in certain applications and sums up the general law the winding-coupled inductors to be considered and followed.
Analysis of Subsidence Monitoring of the Saline Soft Soil Ground in Qarham Salt Lake District
Authors: Liu Jun Yong , Liu Jun Hui , Ding Biao
Published: April 2012

In Qarham salt lake district, dynamic replacement and gravel piles are always used to treated the saline soft ground. In order to find out the deformation of the composite ground in strong-over saline soil district, surface subsistence is monitored after the ground is treated. The results have an important role in guiding the practice, fill the blank of the test engineering of the highway in saline soil area, and accumulate the monitoring experience in saline soil area.
Calibration Method of 3D Body Measurement System Using Stripe Grating Projection
Authors: Huang Xiu Xiang , Tan Qing , Xia Yi Min , Liu Ze Yuan , Cai Lei
Published: April 2012

Calibration is crucial to the accuracy of grating measurement, which directly determines the accuracy of the measurement. The traditional calibration principle is easily influenced by some factors in projection measurement for lack of flexibility. This paper presents a new calibration method by using and improving Zhang’s Calibration Method, by which high accuracy and efficiency are achieved with low cost.
The Development of the Application Program Based on Pro/E
Authors: Zhou Chun Ying , Wang Li Tao
Published: April 2012

According to the development of the application program of the injection molding feeding system for thick wall plastic production .Studied the development method of the application program based on the redevelopment module Pro/Toolkit of Pro/E by DLL (dynamically linked library) in the VC++ programming environment.
3D Body Measurement System Based on Structured Light
Authors: Li Zhong Yang , Liu Ze Yuan , Wang Bai Tong , Huang Xiu Xiang
Published: April 2012

This paper presents a 3D body measurement system based on structured light. We analyze the principal of projection profile measurement and model binocular system with two cameras which comprise a stereo vision system. The goal of calibration method is to achieve the high accuracy for human body dimensions. The system software based on VS 2008 and OpenGL provides a visual interface with standard data interface for CAD/CAM.
A Novel Coal Water Content Measurement Method on Conveyor Belt
Authors: Cheng Xue Zhen , Li Ji Ming , Li Qi , Cao Mao Yong , Rai Laxmisha
Published: April 2012

The coal dust storms create great harm to the environment and human health. The main source of coal dust is the low coal moisture on various types of coal conveying belt. The intensity of coal dust is heavy, especially in the coal-fired power plant, coal transportation coal conveyor belt and in areas, where various reprint point was heavy. In this paper, a measurement method on moisture content of coal conveying belt was proposed. The local group based on the probability can eliminate the factors affecting measuring accuracy such as the big piece of coal, the thickness of coal seam, and coal rock. The rationality behind the measurement was verified by simulation experiments. The proposed method gives an effective method to measure the moisture content of coal on the conveyer belt and provides technical support to prevent the spontaneous combustion and explosion of coal when the moisture content of coal is too low.
An Experimental Study of Systematic Errors in ADC-Based Instruments
Authors: Jiang Yong Jun
Published: April 2012

The paper discusses the problem of quantifying the contribution of systematic errors on the overall measurement uncertainty. We promote the experimental evaluation of uncertainty due to systematic errors. The method is alternative to non-experimental approaches, including the GUM one. The uncertainty due to systematic errors in ADC-based instruments is addressed.We present a general scheme, and use it for the uncertainty due to ADC gain error. The GUM type B uncertainty seems quite poor, compared to the experimental uncertainty.
Time-Domain Forecast Based on the Real Ship Sway Data
Authors: Shi Ai Guo , Zhou Bo , Liu Bo , Wang Zuo Chao , Li Chao
Published: April 2012

The equipment with higher measuring accuracy is installed at a suitable place in fore and aft to get ship sway data during sailing in wind and wave. The data is classified. The ship sway data prediction model based on PSO-SVM method is provided, and the extreme short time prediction result which meets the demand can be get after multi-steps calculation.
Study on the Calibration Method for Orthogonal 3D Scanning Probe System Based on the Linear Calibration Matrix
Authors: Wan Peng , Guo Jun Jie , Li Bei Zhan
Published: April 2012

Gear Measuring Center(GMC) is a kind of instrument for measuring the accuracy of the tooth surface. For the gears whose modulus is not small, the contact measuring method is commonly used. 3D scanning probe is the key component. Because it can reflect the trend of 3D error of the tooth surface, and has the advantages of high-speed and high-precision, it is generally used in the measurement of complex and large gear. However, due to the anisotropy of the mechanical structure of the probe itself and the influence of the external environment factors, it will result in mutual influence among the three deformation directions of the probe, that is coupling phenomenon, therefore it must be calibrated before measurement. In the paper, on the basis of the structure of 3D scanning probe and measurement principle, the varying coefficients linear calibration matrix was innovatively proposed. Through measuring the points planned on the standard ball, based on the spherical equation, the overdetermined nonlinear equations were established. The equations were iteratively solved with the least squares method and genetic algorithm. The calibration matrix was finally experimental verified. The experimental results show that the linear calibration matrix has higher calibration precision than traditional constant coefficient calibration matrix, the calibration method has the advantages of high-efficiency and high-precision, it has a certain reference meaning for the research of the calibration of the probe.
Prediction of Yarn Quality by Support Vector Machine
Authors: Zhang Ru Quan , Li Jian Qiang , He Yu , Jiang Hui
Published: April 2012

For the prediction of yarn quality, this paper presents method to predict the quality of the spinning by a support vector machine. The input parameters to support vector machines including density of coarse yarn, roving twist factor, yarn linear density, yarn twist factor , the output variable is the CV values of spinning, breaking strength, establishment prediction model of CV values, breaking strength SVM. The results showed that: 11 groups of training samples randomly selected from 13 groups samples, two groups as predict sample, forecast errors are below 5% with high accuracy. This research provides a new approach for the spinning process design and quality control.
Multi-Channel Probe for Industrial Ethernet Measurement
Authors: Liu Zhe , Huan Ji , Hu Xing
Published: April 2012

Industrial Ethernet is a fast-developing technology in automation control field. In this paper, the framework of industrial Ethernet measurement system, which consists of probe and parser, is analyzed. A new multi-channel probe of industrial Ethernet is proposed. It is suitable for low-cost distributed measurement applications. Two different working methods and architecture of FPGA internal blocks are illustrated in details. A dedicated frame called “probe-frame” is presented, which involves the information about original frame. At last, an open industrial Ethernet parser is mentioned to analyze the specific frame.
The Application of Thermal Deplying Technology on the Resin Matrix Composite Damage Analysis
Authors: Wang Shuang , Zhang Wei Fang , Yang Ming Yuan , Chen Yu
Published: April 2012

On the foundation of a brief summary of thermal deplying inspection technology on carbon fiber/resin composite laminate, this paper analyzes the application of it on the composite material damage detection. Thermal deplying technology takes advantage of the volatile performance of resin matrix in high temperature environment and marks damages with gold chloride reagent to detect damages. The results show that thermal deplying inspection technology facilitates damage detection and failure analysis of composite material structure.
Study on Machinery Vibration Data Acquisition Node Based on Wireless Sensor Network
Authors: Xue Wei , Dong Xin Min , Li Xiong Fei
Published: April 2012

Aiming at wireless sensor network technology be imported to the mechanical equipment failure monitoring system, firstly introduce the characteristics of the wireless sensor network technology, and design a kind of wireless equipment vibration data acquisition node, Put forward the whole scheme for node. The most important to be introduced is the choice of the sensor, the core processor and communications chip and the design of hardware electrocircuit, finally give the software design of the data acquisition node.
Effect of Scanning Methods on Residual Stress Distribution during Direct Laser Metal Deposition Shaping
Authors: Kong Yuan , Liu Wei Jun , Wang Yue Chao
Published: April 2012

In order to improve that quality of sample and decrease the stress during process, it is of great importance to study the residual stress distribution during direct laser metal deposition (LMDS) process. In this paper, according to the “element life and death” technique of finite element method ,with APDL, we simulated the effects of long edge reciprocating scanning method, short edge reciprocating scanning method and direction orthogonal changing in different layers reciprocating scanning method to residual stress distribution during whole LMDS process are studied. The residual stress distribution under different scanning methods is researched in detail. Using the same process parameters, the simulation result show good agreement with the features of sample which fabricated by LMDS
The Measurement and Analysis on the Coal Slime Yield Stress
Authors: Gao Jie , Hao Xue Di , Wang Zhi Nan , Li Na , Wu Miao
Published: April 2012

Pipeline transportation is an important process of mass industrial use of coal slime. The coal slime is transported in the form of dense pastes under high pressure pipeline. The coal slime yield stress is an important factor to design the pipeline transportation system, but the study on paste yield stress is less seen in published at present. The coal slime yield stress is measured with specific device in this article. Both curves of the speed and the volume concentration on the coal slime yield stress are studied. The relation between the coal slime yield stress and the volume concentration are obtained.
The Design of Remote Device Monitoring System Based on WINCC and GPRS
Authors: Li Guan , Miao Zhi Quan , Bu Xiang Li
Published: April 2012

In this paper, the remote monitoring system based on WINCC and GPRS is introduced. Status data of field devices collected by Siemens S7-200 PLC is transferred to the data center through GPRS wireless communication network of China mobile and field devices are controlled by PLC receiving commands from the host computer. So, production efficiency and economy benefit are improved greatly.
Online Parameter Identification of Synchronous Machine under Small Disturbance
Authors: Xiong Hao , Meng Guang Wei , Jiao Shao Guang , Zhou Li Bing
Published: April 2012

The paper studies the online parameter identification technique of a synchronous machine, constructs its online parameter acquisition system, establishes its proper circuit model and state equation, uses maximum likelihood algorithm to identify the linear parameters of the machine under light load and low excitation, recognizes and modifies the saturation parameters with the magnetic circuit in saturation, inspects and revises the parameters and model in the big disturbance, and verifies the validity of the proposed method by the experiment and simulation.
A PD Robust Controller Design and Simulation Based on Two-Link Manipulator under Given Upper Bound Disturbance
Authors: Wang Ji Yan , Zhuang Yu Xia
Published: April 2012

For industrial robot manipulator system, PD control theory is extensively used in the dynamic characteristics controlling. A PD robust controller is introduced to optimize the stability and convergence of traditional PD controller and avoid excess initial driving torque for two-link industrial manipulator system. By the co-simulation on ADAMS and Matlab/ Simulink, the paper designs a PD robust controller under given upper bound disturbance and completes track control and driving torque trial. Through result comparison and analysis, the superiority of the PD robust controller for two-link manipulator is verified.
Gear Fault Diagnosis Based on Wavelet Transform
Authors: Tang Gui Ji , Wu Jiao , Wang Zi Rui
Published: April 2012

Gearbox operation conditions have a great effect on the equipment of the whole machine directly; therefore, the gear is the main object in the site monitoring and diagnosis. This paper analysis pitting corrosion signals getting from the test-bed. The signals are analyzed and processed in wavelet and Hilbert transform on Matlab. It is shown that wavelet analysis transformation are a kind of effective method on gear fault analysis.