bluuebunny/crossref_metadata_2025 huggingface dataset:
The Stress-Strain Behaviors of High Density Aluminum Foam under Monotonic and Cyclic Loading
Authors: Liu Yu Jie , Qiang Bin
Published: November 2013

The stress-strain behaviors were investigated by monotonic and cyclic stressing tests for high density aluminum foam at room temperature. The cyclic accumulations of deformation for the material were measured in varied loading levels. The effects of mean stress and stress ratio on the ratcheting strain were discussed. The experimental results show that tension response is different from the compressive response. There is obvious cyclic accumulations of deformation (i.e., ratcheting effect) under compression-compression cyclic loading even if the holistic stress-strain response is linear. And the ratcheting of aluminum foam greatly depends on mean stress and stress ratio in asymmetric stress cycling. The experimental rules and data are significant for constitutive description and numerical simulation of aluminum foam.
Electrical and Alcohol Sensing Properties of MWCNT/PS Composites
Authors: Razak Faridah Abdul , Nor Roslan Md.
Published: November 2013

Composites of polystrene and multiwalled carbon nanotubes were prepared using the solution blending method. Results on the electrical conductivity and alcohol vapor sensing will be presented. Field Emission Scanning Electron Microscopy was used to investigate the structure MWCNT/PS composites. The optical characterization was investigated by Fourier Transform-Infrared Spectroscopy. Thermogravimetric Analysis was used to determine the composition of materials and to predict their thermal stability at temperatures up to 6000°C.
Effect of Filler Type on the Electrical Properties of Hexanoyl Chitosan-Based Polymer Electrolytes
Authors: Rosli Nurul Hazwani Aminuddin , Muhammad F.H. , Chan Chin Han , Winie Tan
Published: November 2013

A preliminary investigation of polymer electrolyte based on hexanoyl chitosan, lithium perchlorate (LiClO4) and various filler additives are described in this paper. Hexanoyl chitosan-based nanocomposite polymer electrolytes were prepared using solution casting technique. The effect of filler addition and type of filler on the electrical properties of the prepared electrolyte system was investigated by impedance spectroscopy (IS). The maximum conductivity of 3.06 × 10-4 S cm-1 and 1.96 × 10-4 S cm-1 were achieved for the hexanoyl chitosan-LiClO4-TiO2 and hexanoyl chitosan-LiClO4-SiO2 electrolyte system, respectively. The variations in conductivity observed were discussed quantitatively using the Rice and Roth model from which the concentration of free ions and their mobility were calculated.
Multifunctional Carbon Nanotubes (CNTs): A New Dimension in Environmental Remediation
Authors: Ali Md Eaqub , Das Rasel , Maamor Azman , Hamid Sharifah Bee Abd
Published: November 2013

Water pollution is a serious, persistent and emerging problem not only in Malaysia but all over the world. It has negative impacts on the sustainability of water resources, aquatic flora and fauna and community health. It significantly reduces total water availability because of the lack of suitable and cost-effective pollutant treatment facilities. Current facilities for water purification are time consuming, expensive and have low affinity and efficiency to newly emerging micro pollutants in water. Carbon nanotube (CNT) based nanocomposites and hybrids have attracted huge attention for their potential in the treatment of newly emerging micropollutants in water bodies. Addition of various molecules and binders such as magnetic nanoparticles, pollutant binding and degrading receptors and enzymes has added new dimensions in the fibrous shape, high aspect ratio, large surfaces, and accessible mesopores of CNTs. In this review, we have outlined the recent progress and future prospects of multifunctional CNT-hybrids for the treatment of both conventional priority and newly emerging micropollutants in water environment. The review also has highlighted the future strategies for overcoming the shortcomings of existing techniques and materials for water purification applications.
Effect of Parameters on Lattice Thermal Conductivity in Germanium Nanowires
Authors: Mamand S.M. , Omar M.S.
Published: November 2013

Modified Callaway's theory was used to calculate lattice thermal conductivity (LTC) of Germanium nanowires. Results are compared to those of experimental values of the temperature dependence of LTC for nanowire diameters of 62, 19, and 15nm. In this calculation, both longitudinal and transverse modes are taken into account. Scattering of phonons is assumed to be by nanowire boundaries, imperfections, dislocations, electrons, and other phonons via both normal and Umklapp processes. Effect of parameters, phonon confinement and imperfections in limiting thermal conductivity for the nanowires under considerations are investigated. The suppression in thermal conductivity of these nanowires is arise from electron-phonon scattering and phonon-boundary scattering at low temperatures, while at high temperatures is due to imperfections and intrinsic properties.
Growth and Characterisation of Nanocrystalline ZnO Thin Films by Dip Coating Technique
Authors: Malek Mohd Firdaus , Mamat Mohamad Hafiz , Sahdan Mohd Zainizan , Zaihidi Musa Mohamed , Khusaimi Zuraida , Mahmood Mohamad Rusop
Published: November 2013

Nanocrystalline zinc oxide (ZnO) thin films have been obtained by the sol gel process. A stable and homogeneous solution was prepared by dissolving zinc acetate dehydrate as a starting material in a solution of 2-methoxyethanol and monoethanolamine (MEA). The molar concentration of zinc acetate was fixed at 0.6 mol/L while the molar ratio of MEA to zinc acetate was kept at 1:1. The films were deposited by various deposition speeds by dip-coating on glass substrates, and subsequently transformed into nanocrystalline pure ZnO films after a thermal treatment. Various deposition speeds were selected as the parameter to optimize the thin films quality. The structural and optical properties of the ZnO films were studied by X-ray diffraction (XRD), UV-Vis-NIR spectroscopy, respectively. The electrical properties of the ZnO thin films were characterised by dc 2 probing system and power supply (Advantest R6243). It was found that the deposition speed affects the resultant properties of ZnO thin films.
Alkaline Peroxide in Synergy with Mechanical Refining as Factor in the Development of EFB Paper Properties
Authors: Dermawan Yunita Megasari , Ghazali Arniza , Wan Rosli W.D. , Mohd Zukeri Mohd Ridzuan Hafiz , Kamaluddin Nurul Hasanah
Published: November 2013

Pulp from the oil palm empty fruit bunches (EFB) was extracted via Alkaline Peroxide Pulping (APP). The pulping process was conducted through three main steps; dewaxing of EFB, impregnation of alkaline peroxide (AP) into EFB and refining of biomass to finally produce the pulp. The varying peroxide levels and number of impregnation stages were found to affect the refining energy consumption and the properties of the resultant pulp and paper. Diagnosis by electron microscopic imaging revealed a strong correlation between paper properties development and paper surface morphologies. By multiplying the stages of the low alkaline peroxide level (2:2.5% AP) impregnation, refining energy could be reduced by 30% while improving brightness and paper mechanical properties. Higher alkaline peroxide level (4:5% AP) could reduce the refining energy by 50% while still improving brightness. Beyond these AP levels (8:10% AP), refining energy could be reduced by 67% by increasing the number of impregnation stages, with positive effects on brightness and paper mechanical properties. The findings suggest that increasing the AP impregnation stages had exposed more active sites to react with AP. The enhanced AP accessibility to EFB structures facilitated mechanical fibrillation of EFB vascular bundles through the refining process. The proper synergy between AP and the adopted mechanical refining was the factor that triggered the liberation of nanocells from EFB biomass and this had ultimately improved paper properties.
Physical and Thermal Properties of Zingiber officinale Rosc. (Ginger) Rhizome Fine Particle as a Function of Grinding System
Authors: Norhidayah A. , Noriham A. , Rusop Mohamad
Published: November 2013

In this study,Zingiber officinale(ginger) rhizome fine particles were prepared by using food processor, hammer mill and planetary ball mill and tested for their physical and thermal properties. The physical changes by means of particle size, surface morphology, FT-IR and thermal stability (TGA) were investigated. The size reduction method had a distinct effect on physical and thermal properties of ginger rhizome tested. Average particle size of ginger rhizome after using food processor and hammer mill was around 50µm and 20µm respectively while after using planetary ball mill the ginger rhizome was successfully reduced to nanoscale (222.3 nm). Higher degree of granule surface fractured was observed as a result of a planetary ball milling process based on FESEM images. There were also some notable differences of FT-IR spectra detected. By comparing the spectra, the stretching vibration peak of OH at 3292 cm-1[U1]and the symmetric stretching vibration peak of the NO2and C=C at 1369 – 1639.51cm-1 for ginger rhizome ground using food processor were disappeared. Yet, presence of possibly strong alkenes group (in the range 2850 – 2970cm-1) were observed in all samples tested. Ginger rhizome particles obtained from hammer milling process were found to be more stable to thermal effect where the decomposed temperature was 276.64°C as compared to samples milling using food processor and planetary ball mill. These results would provide useful insight for exploring the potential applications of ginger rhizome fine powder as functional food ingredient as well as in pharmaceutical applications. [U1]Check typing of superscript.
A Study on the Effect of Calcination Temperature on the Graphitization of Carbon Nanotubes Synthesized by the Decomposition of Methane
Authors: Liu Wei Wen , Adam Tijjani , Aziz Azizan , Chai Siang Piao , Mohamed Abdul Rahman , Hashim U.
Published: November 2013

The effect of calcination temperature for Fe2O3/MgO catalysts on the formation of carbon nanotubes (CNTs) was examined. CNTs were synthesized over Fe2O3/MgO catalysts calcined at different temperatures by catalytic decomposition of methane at 1000°C. The synthesized CNTs were investigated by a combination of scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD) and Raman spectroscopy. The results show that the effect of calcination temperatures greatly governed the diameter and the quality of the SWCNTs formed. The catalysts calcined at 500, 600 and 700°C produced CNTswith the diameters of 1.53, 1.95 and 2.97nm, respectively. Generally, an increase in the calcination temperature increases the average diameter and decreases the quality of the CNTs produced.
Electrical Treeing and Morphological Analysis of Epoxy Nanocomposites with Different Concentrations of Silica Nanofillers
Authors: Saad Mohd Hafiez Izzwan Bin , Ahmad Mohd Hafizi Bin , Arief Yanuar Zulardiansyah , Ahmad Hussein , Mohamed Piah Mohamed Afendi Bin
Published: November 2013

In high voltage equipments, insulation systems are the most vital parts to prevent any discharges from occurs around the protected systems. However, the discharges in the form of electrical treeing can easily occur when there are existences of impurities, voids or defects in the insulation bulk. This phenomenon can lead to the insulation breakdown when subjected to prolonged electrical stresses. This paper discusses about the effects of silica nanofillers on the electrical treeing growth in epoxy resin. The silica nanofillers were dispersed in epoxy resin matrices homogeneously by using ultrasonication method based on weight percentage (wt %) which the weight percentages used in this study were 0 wt%, 1 wt%, and 3 wt% respectively. The influence of these nanofillers on the electrical tree breakdown resistance was investigated experimentally. The electrical tree data such as tree inception voltage, tree breakdown voltage and tree propagation time were tabulated and appropriate comparative analysis were made and presented. Last but not least, scanning electron microscopy images were captured and discussed based on its dispersion state and also the morphological features of the epoxy nanocomposites. In this study, it was found that the existence of different silica nanofiller concentrations have profound effects on insulation strength and could exhibit significant improvement of tree characteristics of epoxy nanocomposites.
Structural and Optical Properties of ZnO/PMMA Nanocomposite
Authors: Aziz Aadila , Asib N.A.M. , Afaah A.N. , Mohamed R. , Rusop Mohamad , Khusaimi Zuraida
Published: November 2013

UV filter is an interesting and challenging application in industries. Hence, ZnO-PMMA nanocomposite thin films have been chosen to achieve above mentioned characteristics [1]. In this study, fabrication of ZnO on PMMA glass substrate successfully prepared by using the solution-immersion method. Layer by layer of poly (methyl methacrylate) (PMMA) was deposited on a glass substrate using the spin coating technique by dissolving PMMA in toluene. Various layers of PMMA were varied to 1, 3, 5 and 7 layers. The structural and optical properties of ZnO/PMMA nanocomposite were then characterized by Field Emission Scanning Electron Microscope (FESEM) and Photoluminescene (PL) Spectroscopy. From FESEM result, shape of nanorod unclearly seen as the layer deposited of PMMA increase and from EDAX show oxygen element have highest atomic percentage 65.50 %. 7 layer of deposited PMMA show highest intensity compare to other layers in green region at 577.32 nm for PL measurement.
Formation of Carbon Nanotubes from Methane Decomposition: Effect of Concentration of Fe3O4 on the Diameters Distributions
Authors: Liu Wei Wen , Adam Tijjani , Aziz Azizan , Chai Siang Piao , Mohamed Abdul Rahman , Hashim U.
Published: November 2013

Fe3O4was used to synthesize narrow diameter of carbon nanotubes (CNTs). The effect of concentration of Fe3O4on the diameters of carbon nanotubes (CNTs) synthesized by methane decomposition at 1000°C was investigated. We used conventional impregnation method to prepare Fe3O4/MgO catalysts. The results show that the concentration of Fe3O4greatly affects the diameter distributions of produced CNTs. The CNTs formed by Fe3O4/MgO catalysts, with the mole ratio set at 0.25:9.75 and 1:9 had diameter of 3.23 ± 1.71 and 49.04 ± 33.62nm, respectively, showing that a decrease in concentration of Fe3O4yields smaller diameter and narrower diameter distribution. A growth model explaining tip-growth and base-growth mechanism is proposed for understanding formation of CNTs.
Effect of Urea as a Stabiliser in the Thermal Immersion Method to Synthesise Zinc Oxide Nanostructures on Porous Silicon Nanostructures
Authors: Husairi F.S. , Eswar Kevin Alvin , Ab Aziz Azlinda , Rusop Mohamad , Abdullah Saifollah
Published: November 2013

In this work, ZnO nanostructures were prepared using the catalytic immersion method (90 °C) with zinc nitrate hexahydrate (Zn (NO3)26H2O) as a precursor, urea (CH4N2O) as a stabiliser and porous silicon nanostructures (PSi) as a substrate. PSi prepared on p-type Si by using electrochemical etching method. Different molarity concentration ratios of Zn (NO3)26H2O to CH4N2O (2:1, 1:2, 1:4 and 1:6) were used in this work. The effects of the urea concentration during the synthesis process were discussed. The ZnO nanostructures were characterised using field emission scanning electron microscope (FESEM), photoluminescence (PL) and I-V probe. Porous nanoflakes were successfully synthesised on a p-type PSi substrate that was prepared by electrochemical etching. High-intensity photoluminescence (PL) at the optimum concentration indicated that urea is a good stabiliser to produce ZnO nanostructures with good crystallinity. The high resistance of ZnO/PSi show that electrical properties of PSi dominant compare to ZnO nanostructures.
Optimization of Lead Removal from Aqueous Solution Using Intercalated Malate Mg-Al Layered Double Hydroxides
Authors: Yasin Yamin , Mohamad Maszlin , Sanusi Azlin , Saat Ahmad
Published: November 2013

Conventional optimization method was conducted for the removal of lead from aqueous solution by used of intercalated malate layered double hydroxides. The effects of various parameters such as contact time, amount of adsorbent dosage and the pH of the lead solution are studied. The extent of lead ions removal increased with the increased in contact time and amount of malate-Mg-Al used however, the percentage removal was decreased with the increased in concentration and pH. The fundamentals of lead removal from aqueous solution by used of malate-Mg-Al can be explained by the formation of complexes between the malate and Pb2+ ions. The results from this study indicated that layered double hydroxide intercalated with malate could be used as potential adsorbent for the removal of lead ions from aqueous solution.
Behavior of ZnO Nanoparticles in Aqueous Environments: Influence of pH and Adsorption of Humic Acid
Authors: Fatehah Mohd Omar , Abdul Aziz Hamidi , Stoll Serge
Published: November 2013

The surface charge and average size of ZnO was studied with a function of pH and time. The interactions between ZnO and Suwannee River humic acid (SRHA) were further investigated under a range of environmentally relevant conditions with the pHPZC as a point of reference. The anionic charge carried by aquatic humic substances plays a major part in the aggregation and disaggregation of metal oxide nanoparticles. At low concentrations of SRHA (<0.05 mg="" l="" the="" positively="" charged="" zno="" aggregates="" were="" rapidly="" adsorbed="" below="" ph="" sub="">PZC. With similar SRHA concentrations, at pH=pHPZC, SRHA was able to control the suspension behavior of the ZnO and promoted partial disaggregation in small volumes. This was more distinguishable as SRHA form a surface coating on the nanoparticles and enhances stability via electrostatic stabilization mechanism which induces the disaggregation behavior in the ZnO nanoparticles and hence, decreases the aggregate size.
Low Cost Detection of pH and its Effect on the Capacitive Behavior of Micro-Gap Sensor
Authors: Humayun Q. , Hashim U. , Adam Tijjani
Published: November 2013

The article describes the fabrication and characterization of silver microgap sensor on silicon substrate. By employing cheap photolithography process the proposed microgap sensor has been fabricated. The silver microgap sensor was used for pH sensing, by dropping different pH on microgap surface. To obtain the microgap sensor structure by using AutoCAD software, mask was designed. To maintain high accuracy in pattern transfer the AutoCAD design mask was transferred to chrome glass mask. The fabricated silver microgap pH sensor gap spacing was around 03μm. From the electrical data we conclude that when the pH value varies from acidic to basic (pH 1, pH 2 to pH 11, pH 13) the value of capacitance decreased from 33pF to 8pF. The result shows that the silver microgap pH sensor has the ability to differentiate the acidic pH form basic one. The next part of the research is to decrease the microgap spacing until reach to nanosize spacing, so that can easily used for biosensing application.
Effect of Electrolyte Concentration on the Morphology and Photoelectrochemical Response of Titania Nanotubes Prepared by Electrochemical Anodisation
Authors: Lim Yingchin , Zainal Zulkarnain , Hussein Mohd Zobir , Tan Weetee
Published: November 2013

In this work, the effect of NH4F concentration on the formation, dimensions and photoelectrochemical response of titania nanotubes produced by anodisation of Ti in ethylene glycol has been investigated. The results showed that a minimum amount of 0.25 wt.% NH4F is needed for the formation of uniform and ordered nanotubes in viscous ethylene glycol. Self-organized nanotubes can be synthesized in the concentration range of 0.250.7 wt.%; with a higher fluoride concentration leads to severe etching of the tube tops resulting in a grassy-like appearance. Varying the concentration of NH4F has no effect on the tube diameter and wall thickness. However, nanotubes length increases gradually by increasing the NH4F concentration with preferred growth along the c-axis. Thermal annealing at 500 °C transforms the amorphous nature of as-formed nanotubes into pure anatase phase. Photoelectrochemical response of nanotubes was tested with linear sweep photovoltammetry. It was found that microstructures, crystallinity and geometry of the nanotubes are important factors influencing the photoresponse.
Effects of Pressure Dependence on Nanocolumnar Zinc Oxide Deposited by RF Magnetron Sputtering
Authors: Ameera N. , Shuhaimi A. , Najwa S. , Hakim K.M. , Mazwan M. , Sobri M. , Mamat M.H. , Musa M.Z. , Rusop M.
Published: November 2013

Nanocolumnar zinc oxide (ZnO) was deposited on glass substrates by RF magnetron sputtering.It was performed with a ZnO target at RF power of 200 W. The deposition wascarried out in argon and oxygen ambient at the ratio of 10 and 5 sccmrespectively, with total deposition time of 1 hour. The growth temperature wasfixed at 500°C and deposition pressure specified at 3, 5 and 10 mTorr. It wasobserved that the morphological and photoluminescence properties of ZnOstrongly dependent on the deposition pressure. The ZnO mean grain area was inverselyrelated with the surface roughness. The best morphological andphotoluminescence properties was found to be associated with ZnO grown at 10mTorr. Smooth ZnO surface and lowest defects related emission in PL wasobtained for the respective sample.
Mask Design and Fabrication of Micro/Nanowire Biochip for Reliable and Repeatability Pattern Transfer
Authors: Perumal Veeradasan , Hashim U. , Adam Tijjani
Published: November 2013

In Micro/Nanowire fabrication, the alignment and exposure process are the most critical steps in photolithography process, and indeed for the whole biochip processing. This process determines the success of transferring the Micro/Nanowire design pattern on the mask to the photoresists on the wafer surface. Hence, the resolution requirementsand precise alignment are vital; each mask needs to be precisely aligned with original alignment mark in order to transfer the original pattern from mask onto photoresist layer. Otherwise, itcant successfully transfer the original pattern to the wafer surface causing device and circuit failure. Therefore, the UniMAPs Second Generation Mask Aligner is used for precise alignment and pattern transfer process. Thus, the paper present a preliminary study on fundamentals of resist exposure and development mechanisms for fabrication of Micro/Nanowire, We demonstrated significance of considering process parameters such as mask aligner, quality of resist, soft bake, exposure time and intensity, and development time. There was a very little room for alignment error; we were able to achieved error free design to the criticaldimension.
Carbon Nanotubes: A Brief Outlook on History, Synthesis Methods and Various Bio-Hydrocarbon Sources
Authors: Dalila A.R. , Suriani Abu Bakar , Rosmi M.S. , Rosazley R. , Rosli Jaafar , Rusop M.
Published: November 2013

This paper reports a brief outlook of carbon nanotubes (CNT) history, synthesis methods as well as natural carbon sources such as camphor powder, turpentine, eucalyptus, palm, neem, coconut, castor, olive, corn, sesame oil, palm olein, waste cooking palm oil and waste chicken fat.
Mask Design and Simulation: Computer Aided Design for Lab-on-Chip Application
Authors: Perumal Veeradasan , Hashim U. , Adam Tijjani
Published: November 2013

A simple design and simulation of microwire, contact pad and microfluidic channel on computer aided design (CAD) for chrome mask fabrication are described.The integration of microfluidic and nanotechnology for miniaturized lab-on-chip device has received a large research attention due to its undisputable and widespread biomedical applications. For the development of a micro-total analytical system, the integration of an appropriate fluid delivery system to a biosensing apparatus is required. In this study, we had presented the new Lab-On-Chip design for biomedical application. AutoCAD software was used to present the initial design/prototype of this Lab-On-Chip device. The microfluidic is design in such a way, that fluid flow was passively driven by capillary effect. Eventually, the prototype of the microfluidics was simulated using Comsol Multiphysics software for design validation.The complete design upon simulation is then used for mask fabrication. Hence, three mask is fabricated which consist of microwire, contact pad and microfluidics for device fabrication using photolithography process.
Effect of Ultrasonic Vibration on Electrospun Poly(vinyl Alcohol) (PVA) Nanofibers
Authors: Si Na , Xu Lan , Wang Mei Zhen , Liu Fu Juan
Published: November 2013

Poly (vinyl alcohol) (PVA), a classical biodegradable polymer, is successfully fabricated into nanofibers via the vibration-electrospinning, and the obtained nanofibers are characterized by the scanning electron microscopy (SEM). The viscosity and electrical conductivity of PVA solution vary dramatically with the ultrasonic radiation time and intensity. The novel strategy can produce finer nanofibers than those obtained without ultrasonic vibration.
Hierarchical Motion of Charged Jets in Electrospinning and Nanofibers with Minimal Diameter of about 5nm
Authors: Kong Hai Yan , He Ji Huan
Published: November 2013

Polyvinyl alcohol (PVA) with a degree of 1750±50 was successfully fabricated into nanofibers via the traditional electrospinning process. Daughter charged jets and combined fibers were observed. A combined fiber might be simple combination of two separate fibers without mass transfer, or it is a daughter cascade caused in hierarchical motion of a charged jet with mass/energy transfer. Minimal fiber reaches as small as 5nm (50 angstroms) in diameter, this might be the smallest artificial fiber, which might have excellent properties due to nanoeffect.
Diffusion of Silver Ions in Hollow Cylinders with an Auxillary Cylinder
Authors: Lin Ling , Wang Mei Zhen
Published: November 2013

A mathematical model for diffusion of silver ions in hollow cylinders is established. In order to control the concentration of silver ions, an auxillary cylinder is introduced. The flux of of silver ions can be effectively adjusted by the radius of the auxillary cylinder.
A Sea-Sky Line Identification Algorithem Based on Shearlets for Infrared Image
Authors: Zou Rui Bin , Shi Cai Cheng
Published: November 2013

A shearlets-based edge identification algorithem for the sea-sky in infrared image is proposed. The algorithem demonstrates the performance of edge detection based on shearlets, which is proper to use in infrared images. Simultaneously, with the advantage of edge geometric features provided by the shearlets, infrared image were extracted the direction information of edge of Infrared image, and classified. Simulation results conformed to the theory on edge detection based on shearlets. It drew the outline of edge for infrared image, provided the edge orientation feature and detected the sea-sky line.
Research on the Visual Communication Design Based on Technology of Computer Graphics
Authors: Wang Ying
Published: November 2013

with the rapid development of computer technology, it has become the hot research topic of the current visual communication design that the color, graphics and image information of the visual information can use computer technology to make the pertinence design creation. First of all, this paper analyzes the spatial characteristics of the computer graphics technology. On this basis, the color transformation model is analyzed which is essential in the computer graphics and visual design. In addition, this paper also makes an empirical analysis on the application and function of computer graphics technology in the visual communication design in the form of a case. Finally, it is obtained that computer image technology not only has a significant importance in the design of visual communication, to some extent, but provides a theoretical basis and technical support for the study in this field.
Research on Texture Effect of Image Processing Algorithm Based on Parallel Computing Model
Authors: Fu Yu
Published: November 2013

Under the background of information age, the computer plays a dominant role, and especially the emergence of the network makes the parallel computing possible. It makes the computer do a lot of image information processing in a short period of time, so as to obtain the best effect of art image design. Based on this principle, we design the model and algorithm of art image design through computer. We use normal bump of texture image processing technology, transforming two-dimensional image to 3D display, so as to achieve a good effect of art show. Finally, based on the construction of city public environmental art and city image, using the public environmental logo design as an example, we study the three-dimensional effect in identification system, so as to get a good image of the city, and provide a theoretical reference for the study of city public art and the image of the city.
The Outdoor Data Collection System with GPRS
Authors: Wang Hui , Chen Zheng
Published: November 2013

In this paper, an outdoor wireless remote data collection system with GPRS is proposed. This system is composed by three parts: data collection system, data transmission network and data display terminal. The system uses STM32F103 as the ARM embedded processor, and integrated with humidity and temperature sensor, GPS module, GPRS module. The real-time μC/OS Operation System runs on the hardware platform, extracting required information from the collected data. The experiment results prove the practicality and effectiveness of the system.
A Study on Clustering of the Online-Handwriting of Uyghur Based on Improved K-Neighbor Classifier
Authors: Wang Ling , Dawa I. , Su Guo Ping , Wshour Slam
Published: November 2013

Online-handwriting of Uyghur word categorization (UWC) based on improved K-NN is studied in this paper. Firstly, features are selected by correlation analysis method (CAM), and correlation is measured by linear correlation coefficient (LCC). Secondly, K-NN algorithm is improved and classifier is established. Finally, the classifier is applied in UWC. The experiment results show that the method has good performance on online handwriting of UWC.
The Stability Conditions Evaluation of Network Control System Based on Double Time Delay Discrete Model
Authors: Ding Ling , Fan Ping , Wen Bin
Published: November 2013

The current study of network control stability system has become a very hot topic, the stability conditions of network control systems have also carried out the relevant research on double delay discrete model, its main target to the current actual situation, which carries out the related stability for network control systems with state time-delay. This paper uses the relevant stability theory, the sufficient condition of network control system stability are described under the time-delay discrete model, on the basis of relevant transformation, completing the evaluation for the network control system stability condition of double delay discrete model. Finally, through the relevant data, to carry on its effectiveness validated. The method has certain reference significance for the stability study of similar system, and provides a theoretical reference for the research on this problem.
Research on Key Technologies of Component-Based Postpone Telemetry Pre-Processing
Authors: Zhang Zhi Guo , Gong Lei
Published: November 2013

Telemetry data frame structure is complicated and changeable, so telemetry pre-processing software cannot be universal. To solve this problem, a component method was proposed in this paper, which can effectively compensate for the deficiencies of the traditional method. XML files were employed to configure telemetry parameters, including the information of appropriate processing method for data processing. Based-on memory-mapped telemetry source data extraction can greatly improve source extraction speed, and data integrity is guaranteed by sub-frame data fusion. Subsequent telemetry software developing shows that the method can improve the reusability of pre-processing module and shorten the system development time.
Reactive Power Optimization in Power System Based on Adaptive Particle Swarm Optimization
Authors: Zhao Wen Qing , Wang Li Wei , Han Fei Fei , Wang De Wen
Published: November 2013

This paper summarizes the reactive power optimization of power system characteristics and requirements, proposed to target the active power loss of reactive power optimization mathematical model, And the traditional classical algorithm can not handle the limitations of discrete variables, using the adaptive particle swarm optimization algorithm to solve the problem of reactive power optimization. By testing on IEEE30 bus system simulation, comparing different algorithm optimization results show the effectiveness and superiority of APSO algorithm.
Design of Control System for Lithium-Ion Battery Automatic Casing Machine Based on PLC
Authors: Xia Qin Xiang , Liang Kai En , Li You Xiang , Liu Xiu Juan
Published: November 2013

The structure and the control requirements of lithium-ion battery casing machine and the processes of casing were analyzed, and the automatic control system of cylindrical lithium-ion battery 18650 casing machine was designed based on Mitsubishi PLC. The control program of lithium-ion battery casing machine was designed using GX Developer programming software, and the man-machine interface program of the equipment was designed using GT Designer software, in order to operate and monitor the equipment.
Research on Method of Monopulse Estimation Based on Variable Pulse Repetition Time Stepped-Frequency Waveform
Authors: Zhang Yao Tian , Liu Jia Jia , Zhang Yu Xian , Liu Miao
Published: November 2013

Stepped-frequency signal is an important high distance resolution signal, but it is easy to be effected by target motion. When the target moves, the phenomenon of waveform broaden and range walk would appear if we process the echo of normal stepped-frequency signal directly, so we should compensate target velocity before angle measurement; in regard to variable pulse repetition time stepped-frequency signal, there is only range walk without waveform broaden if we process the echo directly, so we could conduct the amplitude and sum-difference monopulse estimation without velocity compensation, measuring efficiency could be improved. In this article, we analyzed the principle of variable PRT stepped-frequency signal, compare it with the normal stepped-frequency signal to prove its effectiveness. Then we verify the feasibility of angle measurement by using this method.
The Biological Application of Synchronization Ability of Different Complex Network Structures
Authors: Zhang Zhi Hao , Yao Hong , Feng Bo Yu , Peng Xing Zhao , Ding Chao
Published: November 2013

This paper aimed at the chaotic synchronization ability of complex networks with different structures whose nodes have different orders. Problems of complex network synchronization and biological application are introduced firstly. And then, we studied synchronization with different orders and different network structures. Based on Lyapunov stability theory, the coupling function of the connecting nodes synchronization is identified. Numerical simulation results were used to compare the synchronization ability of three kinds of network structures. So, certain biological phenomena of complex network can be explained due to our research.
On the Generalized Drazin Inverse of the Sum of Two Operators
Authors: Wang Shi Qiang , Guo Li , Zhang Lei
Published: November 2013

In this paper, we investigate additive properties for the generalized Drazin inverse of bounded linear operators on Banach space . We give explicit representation of the generalized Drazin inverse in terms of under some conditions.
Information Extraction from Chinese Papers Based on Hidden Markov Model
Authors: Chi Cheng Ying , Zhang Yan
Published: November 2013

Hidden Markov model HMM (1) is one of the important approaches for information extraction. In this paper, a model of the improved first-order hidden Markov HMM (2) is proposed. In the HMM (2), the output probability of the observation is not only dependent on the current state of the model, but also dependent on the previous state of the current state of the model. The algorithm of the ML and the algorithm of the Viterbi are analyzed. At last, experiments show that the HMM (2) is more precise than the HMM (1).
Recursive Enumeration K-Best Decoding Algorithm in Chinese Input Method Application
Authors: Zhan Xue Gang , Zhang Peng
Published: November 2013

The sentence transformation from phonetic to word is a very critical part of the input method. When the input method can not find the candidate through a dictionary word directly, it needs to obtain the results desired by the user through sentence transformation. In this paper, based on recursive enumeration k-best decoding algorithm is used in the input method sentence transformation , with the language model, to get the k-optimal transformation results . Experimental results show that in the input method application environment, based on a recursive enumeration k-best decoding algorithm decoding efficiency significantly better than the deletion algorithm which is the baseline.
Analysis on the Structure and the Hidden Markov Model
Authors: Liu Meng , Zhou Wei , Wang Yang
Published: November 2013

With the rapid development of multimedia communications and the computer network technology, video information has a rising proportion in multimedia information. It owns the great amount of data so that it can obtain accurate information for needed video retrieval research, which has become one of the hot topics of research in this field. By taking soccer video for example, this paper firstly analyzes structure of the soccer video and framework structure. Based on this, this paper makes a specific analysis on the extraction of soccer video feature by combining with the literature to apply SSD apparent characteristic. And then, assisted by the improvement of Hidden Markov Model (HMM), this paper constructs the second frame differential method to detect the shot of soccer video. The test results show that the precision of this method is higher in close-up and misjudgment slow motion. However, it has certain leak detection in slow motion replay of high speed movement.
Performance Analysis of Local Optimization Algorithms in Traveling Salesman Problem
Authors: Qu Da Peng , Tu Hui , Fan Tie Sheng
Published: November 2013

There are plenty of intelligence algorithms and heuristic algorithms for TSP (Traveling Salesman Problem). In this paper, local optimization algorithm which is a good representative of heuristic algorithms was analyzed. The performance of 2-opt (optimization), 3-opt and 4-opt were analyzed and compared through experiments. To reduce running time and improve their feasibility, a modification was made on 3-opt and 4-opt. Ant colony optimization as a good representative of intelligence algorithm was combined with k-opt to analyze. The results provide reference to application of k-opt and designing optimization algorithms for TSP in future.
Connected Mandarin Digit Speech Recognition Using Two-Layer Acoustic Universal Structure
Authors: Rui Xian Yi , Yu Yi Biao , Jiang Ying
Published: November 2013

Because of the single-syllable of Chinese words and the confusing nature of Chinese pronunciation, connected mandarin digit speech recognition (CMDSR) is a challenging task in the field of speech recognition. This paper applied a novel acoustic representation of speech, called the acoustic universal structure (AUS) where the non-linguistic variations such as vocal tract length, lines and noises are well removed. A two-layer matching strategy based on the AUS models of speech, including the digit and string AUS models, is proposed for connected mandarin digit speech recognition. The speech recognition system for connected mandarin digits is described in detail, and the experimental results show that the proposed method can obtain the higher recognition rate.
The Research on Internet Electronic Identity Management Mechanism
Authors: Huang Dao Li , Lei Yun Ting , He Zhi Le
Published: November 2013

Based on the analysis of electronic identity management system to be constructed for challenge, this paper analyzes the development bottlenecks of network real-name system in China, then proposes a electronic identity management model for China's conditions, and discusses the issues about the operating mechanism, information security, personal privacy protection and legal basis that model may cause, finally provides corresponding legal suggestions.
Application of Virtual Technology on Aviation Equipment IETM
Authors: Huang Kui , Zhu Xing Dong , Wang Zheng
Published: November 2013

The Aggregation of visual simulation and IETM is present on this paper. This method builds the relationship on 3D model and technology paper. Complex maintenance process such as assembly or disassembly can be showed simply, and this method can provide high instruction for equipment maintenance.
Research on the Service Navigation System of Engineering Machinery Industry Integration Platform Based on Cloud Computing
Authors: Jia Guang Cheng , Li Yan , Wang Qiu Feng
Published: November 2013

The integration platform based on cloud computing is designed to break through the bottleneck of engineering machinery industry on segmentation of technology services, small scale and low-level services. A structure of service navigation system is presented with work flow as the focus, including service analysis processor, service execution processor and service results manager. This service navigation system can solve the problems of searching all kinds of resources and utilizing the multiple platforms, and strengthen the flexibility and agile response of the integration platform.
An Instance to Extend Object-Z Formal Specification
Authors: Hou Xiao Mao , Ma Ling , Wen Zhi Cheng
Published: November 2013

Object-Z, an extension to formal specification language Z, is good for describing large scale Object-Oriented software specification. This paper introduces Real-Time Object-Z and describes the characters of real-time system: delay, timeout and multithread. Real-Time Object-Z consists two parts: functional specification and filter specification. While Object-Z has found application in a number of areas, its utility is limited by its inability to specify continuous variables and real-time constraints. The main benefit is that it is convenient to deal with the timing variables defined in the specification developed with our approach. The effective specification after applying filter part to functional part holds the form of specification developed with Object-Z. Expanded Object-Z, a modular formal specification language, is a minimum extension of the syntax and semantics of Object-Z. The main advantage of this extension lies in that it is convenient to describe and verify the complex real-time software specification.
Monitoring System Design for Ships Network
Authors: Kong Xiang Feng
Published: November 2013

This paper designs a Vessel Remote Video Monitoring System based on internet protocol. The system uses positioning and network transmission technology to transmit real-time images of ships offshore to the server, to set up the client and visual monitoring ends. Ships monitoring personnel enter WEB monitoring platform with different permissions, to monitor and process ships image data through the network view, scheduling, monitoring terminals and other system modules. It also adds density ratio-based automatic alarm module to realize the intelligent early warning of offshore Ships density. Experiments show that the system has a better result to achieve vessel images' intelligent remote monitoring and early warning.
Emergency Simulation Exercise System Research Based on the Dynamic Information Repository
Authors: Dong Chun Bo
Published: November 2013

The existing emergency virtual drilling simulation system is built on a set or more sets of static database. Case is extracted from the database or randomly generated from the database according to the condition system.It is basicly static data. The happening and development of the emergency is of great uncertainty, and it is constantly changing with the change of the environment and the rescue process. This article builds a set of dynamic database in the original virtual exercise simulation system, in order to join accident flexibly in the event processing node, and simulate dynamic environment conditions at that time in a timely manner. Data processing model that is by the combination of dynamic and static model can simulate disaster occurrence and development more realisticly and accurately.
E-Commerce Collaborative Filtering Algorithm Research Based on Cloud Computing
Authors: Zhao Wen Qing , Han Fei Fei , Cai Rui , Wang De Wen
Published: November 2013

With the continuous development of online shopping, a day will generate tens of thousands of consumer records. E-commerce sites want to recommend the consumers that they may be interested in the products by analyzing the consumer historical consumption data. However massive consumer records led to recommendation speed getting slow by using the traditional personalized recommendation algorithm. By researching on the collaborative filtering algorithm based on ALS and the MapReduce parallel programming model, we explore parallelization of collaborative filtering algorithm based on ALS. The experimental results show that the algorithm in this paper can improve the computing efficiency.
Data Security and Privacy Protection of Cloud Computing
Authors: Dai Xue Bing , Wang Zhao Jing , Zhang Yan
Published: November 2013

Data security and privacy protection of cloud computing as a new IT application mode are the most valued and concerned issues of the cloud user,and thus of utmost significance to the security of cloud computing. This paper describes and analyzes in detail the risks of data security and privacy showup brought by cloud computing,discusses the protective approaches of data security and privacy in cloud computing environment. Furthermore, this paper based on the newly developed fully homomorphism encryption then proposed a data security scheme which can operate encrypted data directly on cloud server without decrypt while all communication between client and server is encrypted, it can assure data security at the mean time assure the operate efficiency.
Key Technology on Uniform Identity Authentication for Digital Campus
Authors: Liu Wei Xue , He Lei
Published: November 2013

Digital campus is an important part of university construction, original campus network teaching, research, management, service and other application system, use a separate identity authentication, neither convenient memory, but also manage and maintain trouble. Contrary to identity authentication problem, this paper research uniform identity authentication key technology, include uniform identity authentication system model, remote authentication dial in user service, lightweight directory access protocol and so on. Uniform identity authentication is the foundation work of digital campus, the disperse user centralized management and permissions resources, help achieve the intranet information portal user uniform authentication, simplify user accessing to the internal process of the application system, so users only need to pass uniform identity authentication once have permission to access all resources.