bluuebunny/crossref_metadata_2025 huggingface dataset:
Research on Fabrication for Nanostructures on the Surface of GaN
Authors: Zhang Heng , Zhou Xiao Hong , Fang Zong Bao , Chen Lin Sen
Published: March 2013

A novel way to fabricate nanostructures on the GaN surface using a GaN-on-Sapphire system is developed. The direct fabrication of nanostructures on GaN was performed by four interfering nanosecond laser beams with a diffractive beam splitter. It was found that the obtained nanostructures had a negative shape of the interference pattern of four laser beams. The reflection losses at the GaN interfaces are suppressed. The light extraction efficiency is significantly improved for the nanostructured GaN layer. This work provides a very practical approach to fabricate freestanding nanostructures on the GaN-on-Sapphire system for further improving the light extraction efficiency.
Copolymer Nanoparticles Prepared by Self-Assembly of Poly(ethylene glycol) and Poly-γ-Glutamic Acid and its Characteristics
Authors: Yang Ge , Lu Ke Shuai , Su Xue Yan
Published: March 2013

The paper describes the preparation and characterization of novel biodegradable nanoparticles based on self-assembly of poly-gamma-glutamic acid (γ-PGA) and poly(ethylene glycol) (PEG). The nanosystems were stable in aqueous media at low pH conditions. Solubility of the systems was determined by turbidity measurements. The particle size and the size distribution of the polyelectrolyte complexes were identified by dynamic lightscattering and transmission electron microscopy.It was found that the size and size distribution of the nanosystems depends on the concentrations of γ-PGA and PEG solutions and their ratio as well as on the pH of the mixture and the order of addition. The diameter of individual particles was in the range of 30–270 nm. measured by TEM, and the average hydrodynamic diameters were between 130 and 300 nm. These biodegradable, self-assembling stable nanocomplexes might be useful for several biomedical applications.
High Quality Porous Anodic Alumina Membrane Growing on Micron Thickness Aluminum Film Sputtered on Silicon Substrate
Authors: Wu Jun Jun , Li Dan , Wang Kai Ge , Zhang Chen , Hu Xiao Yun , Jin Ai Zi , Gu Chang Zhi , Zhang Liang Liang
Published: March 2013

The porous anode alumina (PAA) films on silicon substrate with good physicochemical properties have hopeful for the nano-scale devices. The various factors which influence the preparation of high performance PAA film based on silicon were systematically studied, the DC magnetron sputtering technology was used to deposit aluminum and the two-step anodic oxidation method to growth PAA membrane. The results demonstrated that about 2 μm aluminum film deposited on the p-type silicon substrate, in advance deposited 50 nm Ti film on the Si substrate, can get high quality Si-based PAA membrane with good adhesivity, stable structure and consistent pore shape and diameter.
Application of Nano- TiO2 Used in Road Engineering and its Long-Term Decomposition Effect
Authors: Wang Xiao Lun , Liu Li Ping , Xu Hai Ming
Published: March 2013

With the widely research of nano-TiO2, researchers have found another way of managing air quality. As an excellent photocatalyst material, nanometer titanium dioxide has begun to be used in road engineering in recent years. In this paper, substantial gas decomposition tests are performed utilizing the self-designed sealed container and UV aging box. At first, the catalytic efficiencies of nanometer titanium dioxide dispersed in silane solvent and in asphalt mixture were compared. The results show that nanometer titanium dioxide is able to decompose CO, HC and NO after being dispersed in silane solvent and asphalt mixture. To achieve the same catalytic efficiency, the amount of the nanometer titanium dioxide dispersed in silane solvent is much less than that in asphalt mixture. For asphalt mixture, high void fraction may mean high catalytic efficiency. Then the long-term decomposition of asphalt mixture was discussed. The asphalt mixture still has good catalytic decomposition effect after six months. The catalytic effect of asphalt mixture does not diminish over time and the effect of decomposing HC has improved after six months. At last, for cement paint, the catalytic effect of decomposing NO and HC does not diminish over time, but the effect of decomposing CO reduces.
The Application Prospects of Nanotechnology in Future Competitive Sports Development
Authors: Li Gang , Cheng Yan
Published: March 2013

With the development of Nano research, many excellent performances of nanotechnology are discovered. And the space for application is enlarged. Competitive sports may become another new area for the application of nanotechnology. According to the study of sports facilities and equipments, training and sports scientific instruments, sports fatigue mechanism and recovery, sports injury and nutritional supplements, genetic material, this paper states the application prospects of Nanotechnology, a high-end technology in future competitive sports development. Further more, it strives to provide theoretical support for the future competitive sports development in technological innovation so as to impel the development of future competitive sports
Microhardness of Electroless Composite Coating of Ni-P with SiC Nano-Particles
Authors: Su Wei
Published: March 2013

A central composite rotatable orthogonal experimental design of response surface methodology (RSM) was employed to find the optimum parameters combination of microhardness of electroless composite coating of Ni-P with SiC nano-particles. Microhardness of electroless composite coating was used as response function, and three parameters, namely, coating liquid temperature, PH, the concentration of SiC nano-particles were selected as influence factors. Nano-particles were dispersed using ultrasonic. The effects of every factor on response function were analyzed, and the optimum combination for three parameters were obtained, which one was 84~86°C of coating liquid temperature, 5.3~5.7 of PH and 4.5 g/L of concentration of SiC nano-particles. The optimum result was microhardness of electroless composite coating more than 1000 HV after heat treatment.
The Investigation of Electrospun Polymer Nanofibers as a Solid-Phase Extraction Sorbent for the Determination of Benzimidazoles in Pork
Authors: Sun Jing , Wang Yu , Zhou Xiao Ling , Kang Xue Jun
Published: March 2013

A novel micro-extraction procedure was developed through the use of an electrospun polymer nanofiber as a solid-phase extraction (SPE) sorbent to directly extract benzimidazoles in pork. The target compound was then monitored by a high performance liquid chromatography with ultraviolet detector (HPLC-UV) system. The eluted solvent was investigated meanwhile. Under the optimized conditions, a linear response for benzimidazoles over the range of 20-1000 ng mL−1 was achieved with the γ2 >0.99. The recoveries were in the range of 95.4%~101.2%. RSDs of intra-day and inter-day assays were 3.5%~6.3% and 5.7%~9.9%. The method is simple, sensitive, accurate and repeatable, which can be used for the determination of benzimidazoles in pork.
High Performance Ka-Band InAlN/GaN/AlGaN HFET on SiC
Authors: Zhang Xiao Wei , Jia Ke Jin , Fang Yv Long , Dun Shao Bo , Feng Zhi Hong , Zhao Heng Ping
Published: March 2013

Ka-band radio-frequency(RF) performance of a InAlN/GaN/AlGaN HFET on SiC was reported. Based on a detailed delay analysis,a maximum drain current density of 1.12 A/mm was obtained. Power measurements were performed, the maximum output power density is 2.1 W/mm and a power-added efficiency (PAE) is 22.3% at 29 GHz. The current gain cut-off frequency (fT) is 60 GHz, and the power gain cut-off frequency (fMAX) is 105 GHz.
Preparation of HA-Zirconia Nanocomposite for Dental Applications
Authors: Lim Kok Fong , Andanastuti Muchtar , Mustaffa Rusnah , Tan Chou Yong
Published: March 2013

Hydroxyapatite (HA)-zirconia nanocomposite is synthesised by mixing as-synthesised HA with commercially available yttria-stabilised zirconia nanopowder using wet ball milling. The sample is consolidated using uniaxial pressing followed by cold isostatic pressing. The composites containing 0 wt%, 0.05 wt%, 0.1 wt%, 0.5 wt%, 1 wt%, and 5 wt% zirconia are prepared and sintered at 1100, 1200, and 1300 °C. Results from the X-ray diffraction (XRD) and density analyses show that the proposed approach produced a highly dense sample (>98.8%) with minimum amount of impurity, which is suitable for dental applications.
Study on the Double-Fined Treatment and Superplasticity of GCr15 Die Steels
Authors: Liu Xing Hai , Wu Feng Juan , Wu Hui Bin , Sun Ji Quan , Ren Xue Ping
Published: March 2013

Heat treatment has a signifieant impact on the performance of the GCr15 die steel. Using scanning electron microscopy, optical microscopy, hardness tester and tensile testing machine analyses the influence of double-fined treatment on microstructure and mechanical properties of GCr15 steels. The results show that the double-fined treatment can make the carbids which haven’t insoluted fine to 320nm and the grains fine to No. 10. The dislocated martensite become more after double-fined treatment; at the same time, there are more sheet-retained austernite in lathy martensite and around sheet martensite; broken-orifice changes from definitely cleavage brittleness fracture to definitely cleavage tenacity fracture. By double-fined treatment, die steel can be given the neeessary strength and toughness, and the life can be substantially increased. The superplasticity of GCr15 die steel was improved by double-fined treatment. The optimal temperature range of the elongation is: 680~780°C. Anti-oxidants can improve the elongation of GCr15 steels.
Electrochemical Studies of 316L/20G Clad Pipe Weld Joint Corrosion Behavior
Authors: Fan Zhao Ting , Zhang Shen Tao , Liu Jia
Published: March 2013

To research the corrosion of clad pipe weld joint, commenting the welding processes of and analysis of the corrosion medium of clad pipe weld joint, using electrochemical impedance spectroscopy carried out the comparative analysis of Nyquist and bode diagram within the time limit of clad pipe weld joint. The results showed that: 316L/20G clad pipe weld joint in the sewage water up to two weeks, because of the passive film thickening, weld corrosion resistance up to the maximum, and then stabilized; Its resistance is slightly decreased, but still has a good corrosion resistance, therefore, 316L/20G clad pipe can be widely used in the sewage pipelines of oil and gas fields.
Influences of Emulsion on Water Resistance of Vitrified Micro Bubbles Thermal Insulation Material
Authors: Zhu Jiang , Li Guo Zhong
Published: March 2013

Vitrified micro bubbles thermal insulation material was made of vitrified micro bubbles, cement, fly ash, gypsum and sodium silicate, by molding process. VAE emulsion and stearic acid-polyvinyl alcohol emulsion were added to improve water resistance of the material. Mixed with 10% VAE emulsion and 5% stearic acid-polyvinyl alcohol emulsion, properties of the material are followed as: flexural strength 0.64MPa, compressive strength 1.35MPa, softening coefficient 0.71 and 2h volumetric water absorption 6.9%.
Treating the Eutrophic Water by Ultrasonic – Flocculation Sedimentation
Authors: Ma Lin Zhuan , Wang Zhi Ying , Guo Jun Ming , Cui Qiong Fang , Liu Man Hong , Zhang Ying Jie
Published: March 2013

With the development of industrial production and the improvement people's living standards, all kinds of discharged wastewater cause serious pollution for nitrogen and phosphorus.In this study, the water of Dianchi lake was treated by Ultrasonic – flocculation. The results show ultrasound-flocculation sedimentation is better than only flocculation sedimentation in removing the total phosphorus, total nitrogen and reducing COD, BOD and turbidity respectively increased 16.19%, 12.71%, 9.1%, 20%, 18.3%.
The Soil Geochemical Abnormal Characteristics in Eastern of Luonan County in Shanxi Province
Authors: Zhang Wan Wan , Peng Hua Ming , Peng Jia Yong , Guo Fu Sheng , Xia Fei
Published: March 2013

The study area is located in the north belt of Qingling latitudinal structural belt and contains well developed folds and faults directed EW and the iliceous carbonate sedimentary formations mainly in Lower Paleozoic Group and the sedimentary clastic rocks in Middle-upper Paleozoic Group. Tuyaowa anomaly belt, mainly with Au, As, Sb anomalies, is the favorable target for Au, As, Sb. Zhaizigou-Jianggou-Yujiagou anomaly belt, with Au, Ag, Cu, Zn, Mo anomalie, is the favorable target for Au, Ag, Cu, Zn, Mo. Miaowa-Houling abnomal belt, with Pb, Hg anomalies and Au, Ag, Zn, Mo weak anomalies, is the favorable target looking for Au, Ag, Zn, Mo and Pb. The abnomal belt of Shuigou-Hugou, with Au, Cu, Mo, Pb, V anomalie, is a favorable target for Au, Cu, Mo, Pb and V.
Ferro-Antiferromagnetic Coupling and Enhancement of Magnetoresistance in La0.67Ca0.33MnO3/LaMnO3 Composites
Authors: Ren Guang Ming , Liu Jing Lin
Published: March 2013

The samples with the nominal composition of (1-x)La0.67Ca0.33MnO3/xLaMnO3 with x=0.00, 0.05, 0.15 and 0.25 were fabricated using a special experimental method. The electrical transport behaviour and magnetoresistance (MR) were studied for the composites in magnetic fields H=0.3T, 3T. Experimental results show that with the increasing LaMnO3 doping level, the metal–insulator（M-I） transition temperature TP shifts to lower temperature and the resistivity increases sharply in zero magnetic field. Meanwhile, a significant enhancement in MR is observed for the composites especially in the low temperature range（below TP）. Specially, the maximum MR at 3 T increased from 35% for the pure La0.67Ca0.33MnO3 to 92% for the sample with x=0.25. We suggest that such enhancement in MR is attributed to the strong ferro-antiferromagnetic coupling effects in the composite system, which increase the magnetic disorder at the grain surface and boundary, will improve the spin-polarized tunneling process of the conducting electron between adjacent grains, and thus enhance the MR effects.
Mechanism of Flow Properties for Biodiesel Blends at Low Temperature
Authors: Cui Yong , Yuan Yin Nan , Chen Xiu , Lai Yong Bin
Published: March 2013

The chemical composition of biodiesel was analyzed by gas chromatography-mass spectrometry. The cold filter plugging point of biodiesel was measured according to GB/T 20828-2007. The cold flow properties of biodiesel were investigated on the basis of the crystallization theory, including chemical composition and molecular structure. Biodiesel might be considered a pseudobinary mixture, namely, high-melting-point saturated fatty acid methyl esters and low–melting-point unsaturated ones. Bilayer crystal structure of biodiesel was founded. Bilayer structure with headgroups aligned next to each other inside the crystal and away from nonpolar bulk liquid was large platelet lamellae. The results showed that biodiesel was mainly composed of saturated fatty acid methyl esters (C14:0～C24:0 ) and unsaturated ones(C16:1～C22:1、C18:2 and C18:3 ). The cold flow properties for biodiesel were determined mainly by the amount and molecular structure of saturated fatty acid methyl esters. The long-straight-chain saturated fatty acid methyl esters tend to have relatively poor cold flow properties. The cold flow properties worsen with increasing the amount and carbon chain length of straight-chain saturated fatty acid methyl esters. The ways of adjusting biodiesel composition and treating with depression of cold filter plugging point were given; they could improve cold flow properties.
Influence of Residual Stress on the Thermal Expansion Behavior of Electroformed Nickel Layers
Authors: Liu Yi Chun , Zhang Jia Min , Yi Jian Hong
Published: March 2013

Nickel layers with tensile or pressure residual stress were prepared by electroforming technique from two kinds of electrolyte. Subsequent heat treatment was adopted to get the stress released. The coefficients of thermal expansion (CTEs) were measured with a thermal dilatometer and the relationship between residual stress and the measured CTEs was revealed both from experimental results and theoretical analysis.
Promoting Behavior of Fungal Degradation Polychlorinated Biphenyl by Maifanite
Authors: Gao Guo Rui , Yin Yue Fen , Yang Duan Yang , Yang Dong Fang
Published: March 2013

Biotransformation of persistent organic pollutants (POPs) may be affected by many factors such as biostimulation and bioaugmentation whether beneficial or not. Served as natural healthy medical stone, feed additive and also filters for their adsorption capability in water purification function, was used widely in China. In this paper, PCB 118 was selected as typical polychlorinated biphenyl to study maifanite additive influence on the degradating efficiency of marine fungi for POPs. The results of controlled trials by two penicillium fungus showed thatthe degradation rates of PCB 118 were higher with maifanite as promoting additive than mediums without maifanite. Significant differences were found in further analysis of zeta potential of maifanite in solutions from pH 2 to pH 9 suggesting different adsorption capability of maifanite at different pH levels.
Influence of CO2 Kinetic Cooling Effect on the Phase of Second Harmonic Gas Photoacoustic Signal
Authors: Wu Zhi Ying , Lu Ming , Yu Qing Xu
Published: March 2013

Due to the impact of the CO2 kinetic cooling effect, which is kind of energy transfer between CO2 and N2 molecules, the mixed gas containing CO2, the amplitude of the photoacoustic signal and the detected gas concentration are no longer a linear change, and the signal phase also has been changed. In this study, the energy transfer model between CO2 and N2 molecules in near-infrared band (1～2.2μ) was derived, the influence from CO2 gas with different concentration on photoacoustic signal was discussed, and the relevant experimental tests were made，which showed that the proposed model can scientifically interpret the energy transfer relation between CO2 and N2 molecules and can quantitatively determine the influence from CO2 gas with different concentration on photoacoustic signals excited by mixed gas with including CO2 gas.
Design and Simulation of Film Bulk Acoustic Wave Resonator in Ku-Band
Authors: Mohd Nor Nurul Izza , Shah Kriyang , Singh Jugdutt , Sauli Zaliman
Published: March 2013

This paper presents the design of a Film Bulk Acoustic Wave Resonators (FBARs) operating in Ku-band. The one-dimensional (1-D) numerical and the three-dimension (3-D) Finite Element Method (FEM) simulation results are analysed and compared. The results show that coupling coefficient (k2eff) up to 6.5% can be obtained with optimised thickness ratio of electrode/piezoelectric layers of operating frequencies greater than 15GHz. The FBARs have areas of 1.69x10-4µm2and 7.84x10-4µm2for series resonance frequency of 14.7GHz and 15.9GHz respectively and achieves quality (Q) factor of 300. The designed FBAR filter operating in Ku-band has the centre frequency of 15.5 GHz, the insertion loss of 3.5dB, out-of-band rejection of 13dB and fractional bandwidth of 6.6%.
Influence of Insulator Layer Width on Propagation Properties of Symmetric Surface Plasmon Polariton Mode in Metal-Insulator-Metal Waveguide
Authors: Xiao Gong Li , Duan Ji Hai , Xu Wei Lin , Yue Hong Wei , Wei Bao Lin
Published: March 2013

Influence of insulator layer width on propagation properties of symmetric surface plasmon polariton (SPP) mode, which is excited through a dipole embedded in SiO2 layer of Au/SiO2/Au structure in metal-insulator-metal (MIM) waveguide, has been investigated. The symmetric SPP mode has a propagation length along SiO2/Au interface that depends on SiO2 layer width. Its maximal value is 0.61 μm with SiO2 layer width of 100 nm. These values provide a theoretical reference for designing a high-performance SPP source using Au/SiO2/Au structure.
Fluid-Structure Coupling Analysis of Traveling Wave Micro-Pump
Authors: Wei Chang Zhi
Published: March 2013

The generation method of traveling wave and the driving force source in straight micro channel were investigated based on the vibration theory. The analysis shows that the driving force in traveling wave micro-pump is closely related to the fluctuations of the channel wall and there is traveling standing wave along the straight micro channel. Through fluid-structure coupling analysis, flow characteristics in straight micro channel are obtained as well as the outlet velocity. The average outlet velocity is about several hundreds of nanometers percent second if only the mechanical force is considered. The influence of the driving voltage on the velocity is also analyzed to provide guidance on the optimal design of the traveling wave micro-pump.
Vibration Analysis of a Rail Operating Vehicle
Authors: Guo Wei , Ding Qian
Published: March 2013

A simplified rigid-flexible coupling dynamical model of the rail operating vehicle, including bogie frame and car body, was built. The car body is modeled as a flexible uniform Euler beam. The dynamical response of the vehicle under the irregularity dynamic action between wheel and rail was numerically calculated and analyzed by the fast stability algorithms. Influences of the suspension on vibration and stability of the vehicle are analyzed. The results have a certain reference value on the dynamic design of multi-functional track operating vehicle.
Analysis of Coupled Bending-Axial Vibration of a Rotor
Authors: Ye Jian Feng , Zheng Chun Long , Yao Xue Shi
Published: March 2013

Aiming at a rotor model, the coupled bending-axial vibration is being analyzed.Calculation results show that the prestress relative to rotational centrifugal load may influence bending vibration frequencies of a rotor.The bending vibration frequencies will increase when the prestress increases.The axial vibration frequency has not an influence because the direction of the spinning prestress is perpendicular to axis.When a rotor is applies axial force, a compressional force will tend to increase the axial vibration frequencies while a tensile force will decrease the axial vibration frequencies.The effects of the prestress(centrifugal load )of the spinning rotor and the axial prestress can be accounted by an adjustment of the stiffness matrix for analysis.By use of the stiffness matrix,the changed axial and bending vibration frequencies can be explained.The coupled bending-axial vibration may take place when the bending vibration frequencies have increased in the state of the changed prestress.In the end, the coupled bending-axial vibration frequency can be calculated.On the basis of prestress, the coupled lateral-torsional vibration and the coupled torsional-axial vibration frequency can be analysed,similarly.
Design and Research of a Construction Robot Based on Series Parallel Structure
Authors: Yang Dong , Li Tie Jun , Wang Ya Qian , Gao Na
Published: March 2013

Aiming at the difficulty and low automation in installing slabstone under dry-hanging technology which is heavy and large in size, a slabstone dry-hanging installation robot system was developed. According to the working requirements such as load, installing precision and process, we researched a 6-DOF of series-parallel manipulator, analyzed its structural and completed the inverse solution. The inverse position equation of the robot was derived based on the kinematical theory. Mathematical relation between the Position-Orientation parameters and the direction cosine matrix was established. Experiments show that the robot can achieve slabstone auto- installing, and solve the problems in the dry-hanging installing.
Modal Analysis of BT Spindle-Toolholder Interface Based on Abaqus/Standard
Authors: Zhao Yong Sheng , Yang Jing , Song Xiao Lei , Qi Zi Jun
Published: March 2013

The quality of high speed machining is directly related to dynamic characteristics of spindle-toolholder interface. The paper established normal and tangential interactions of BT spindle-toolholder interface based on finite element contact theory, and analysed free modal in Abaqus/Standard. Then the result was compared with the experimental modal analysis. It shows that the finite element model is effective and could be applied in the future dynamic study of high-speed spindle system.
Lifting Chuck Design Based on Fuzzy Expert System
Authors: Ding Ning , Zhang Ding Tong , Song Yu Mei , Shi Jian , Ding Li Gong
Published: March 2013

The permanent magnet lifting chuck has been designed. The working principle was proposed. The fuzzy expert system of lifting chuck magnetic circuit was developed. Meanwhile, the perfect self-acting driving system has been invented. Industry prototypes were manufactured, and they verified that the designed lifting permanent magnetic chuck was feasible.
The Production and Experience of Hot Charging Process of Concasting Billet
Authors: Ji Li
Published: March 2013

Practice of hot charging process of concasting billet，is a process technology which is encouraged by nation industrial policy. It makes use of the sensible heat of conticasting billet, and can save energy consume, cut production cycle, improve product quality, advance recovery of metal and reduce cost of production. Motor transport, assort thermal retardation in burial pits, transfer component by computer, self-action assort group batching by computer are used by LongSteel, can solve various contradicitions of hot charging process of concasting billet, ensure the order of elevated temperature billet hot charging process, produce considerable economic benefit and offer experience for generalization and application.
Self-Compensated Precision Hydrostatic Rotary Bearing
Authors: Zuo Xiao Bo , Wang Jian Min , Yin Zi Qiang , Li Sheng Yi
Published: March 2013

A self-compensated hydrostatic rotary bearing is designed and manufactured. The bearing is modeled by fluid flow network method, and simulations are performed to predict the load carrying capacity. A hydrostatic bearing prototype has been tested and results show that it can achieve a stiffness of 120N/μm in radial direction and 220N/μm in axial direction under a supply pressure of 1 MPa, and its motion accuracy is 0.3μm. The designed bearing is suitable to be used in precision machines.
Environmental Monitoring System Based on ZigBee Wireless Sensor and Low-Power Technology
Authors: Wang Hong Fen
Published: March 2013

Environment monitoring system is an application service system for the management of industry and agriculture and the construction and operation of the national economy, which is conducive to the protection of the environment and ecology, can effectively avoid major environmental pollution incidents to threaten people's lives and property safety, and provide information support to safe energy system and to more efficient cooperative-work. The wireless sensor network is the product of the combination of sensor technology, communication technology and computer network technology. The wireless communication technologies in wireless sensor networks include infrared, Bluetooth, Wi-Fi, and ZigBee, etc.. ZigBee technology is a set of communications technology for networking, security and application software with developed based on the IEEE 802.15.4 wireless standard, which are provided with low-power, low-latency, high security and other technical advantages. In this paper, the ZigBee wireless sensor network was used for data acquisition, wireless transmission in environmental monitoring site, which overcame the disadvantages and difficulties from traditional manual sampling monitors and from complicated wiring cable network monitoring. Quickly through ZigBee network data transmission to the monitoring platform to provide a reliable basis for environmental monitoring.
The Airborne SAR-ATI-GMTI Based on the Actual Flight State
Authors: Zhang Wei Dong , Song Nuan , Li Jun
Published: March 2013

In this paper the actual airborne dual-channel data is disposed to indicate the moving target by ATI. Consider the SAR-ATI influence caused by the actual flight state, the paper presents the method to compensate the interference phase base on calculate the phase centroid of every sub-image. Besides, this paper simplifies some data processing to realize the real-time GMTI and improves the efficiency. With this method, the actual SAR data is proceeded to get the target’s position and movement parameter. Results prove the validity of the approach.
Study on Preparation and Photoluminescence Performance of High-Directional ZAO Nanorod Arrays
Authors: Liu Yang Lin , Duan Xue Chen , Liu Yan Yan
Published: March 2013

Al-doped zinc oxide (ZAO);nanorod arrays;thin film;preparation; photoluminescence. Abstract: ZAO thin films were deposited on glass substrates by sol-gel method and then by controlling processing parameters such as the amount of doped Al and stability, etc.well-aligned Al-doped ZnO nanorod arrays with a narrow diameter distribution were successfully grown on substrates by hydrothermal method, where the substrates were spin-coated with seed layer.The experiments show the 2% Al-doped and diameter about 50nm of ZAO nanorod arrays has the best photoluminescence and surfactants can promote the growth of ZAO rod-like nano-structures and contribute to the formation of ZAO nanorod arrays with highly oriented nanorod arrays.
Research of Automotive Controller Area Network Bus Detection System
Authors: Cui Hong Wei
Published: March 2013

The detection method of automotive controller area network bus is studied in this paper. The composition of detection system is introduced. By analyzing and processing the data of CAN bus and sensors, work condition of automotive is achieved. Multi-pattern data fusion model and algorithm for failure diagnosis is researched. The detection system designed in this paper can be applied to automotive fault analysis, troubleshooting and maintenance.
Characterization of Integrated GMR Sensor with Angular Variation
Authors: Sun Yu Cheng , Qian Zheng Hong , Bai Ru , Zhu Hua Chen , Li Jian Ping , Zhu Jian Guo
Published: March 2013

In this work, GMR multilayer films are deposited and then processed into GMR sensors. The transfer curves of GMR sensor are acquired by sweeping the signal magnetic field in different directions. In addition, the rotation behavior is measured by rotating a magnitude-fixed field around the sensing axis. The results are analyzed and it’s found that the angular dependence of GMR sensor can be characteristic with cosine function.
Anticontrol of Chaos for a Stable Permanent Magnet Synchronous Motor System via Time-Delay Feedback
Authors: Sun Xin , Zhao Li , Yu Tong Wei
Published: March 2013

In this paper, the chaotification problem of a stable permanent magnet synchronous motor (PMSM) system is investigated. First, the stable PMSM plant is exactly represented by a simple continuous-time T–S fuzzy model with a few IF-THEN rules. A simple time-delay feedback controller is designed by parallel distributed compensation (PDC) technique. Then, Based on the T–S fuzzy system, We realize the anticontrol of chaos for the stable PMSM system by choosing parameters properly. Finally, the effectiveness of the proposed chaotic anticontrol method is verified by simulation results.
A New Approach to Robust and Non-Fragile Control of Uncertain T-S Fuzzy Systems with Interval Time-Delay
Authors: Li Li
Published: March 2013

This paper describes the synthesis of robust and non-fragile state feedback controllers for T-S fuzzy system with time-varying delay in a range and parameter uncertainties. A new method is proposed by de¯ning new Lyapunov functionals and introducing some free-weighting matrices. Impr oved delay-dependent results are presented.
Design of Colliery High-Voltage Integrated Protector Based on DSP TMS320F2812
Authors: Ni Li Na , Zhang Jin Quan , Guo Xin Shan
Published: March 2013

TMS320F2812 is widely used in the design of embedded control system. Based on DSP TMS320F2812, the colliery high-voltage integrated protector which has setting protection, measurement, controlling and communication is developed. The design of AD module, CAN bus communication module and protection module of the integrated protector is elaborated. The structure design of its internal circuit and realization algorithms of part of modules are also given. Experimental results show that the protector achieves a good performance.
Levitation Control of a Planar Magnetic Levitation Stage Based on Improved Auto-Disturbance Rejection Controller
Authors: Zhou Zhen Xiong , Qu Yong Yin , Liu De Jun
Published: March 2013

In the present study, we proposed a magnetic levitation positioning stage for the high-precision positioning and scanning tasks in micro-electronics manufacturing and precision machining. This stage consists of a thrust system and a levitation system, the latter is a strong-coupling and nonlinear MIMO system related closely to both levitation height of each terminal magnetic bearing and instantaneous plane location of the movers and is focused on in our study. The dynamic model of this levitation system is so complicated that it is very difficult to obtain an ideal control accuracy and robustness by linear control theory, therefore, an improved auto-disturbance rejection controller was designed to realize decoupling and disturbance rejection and overcome the rough characteristics of traditional auto-disturbance rejection controller. The simulation and experiment showed that the performance of improved auto-disturbance rejection controller is superior to the traditional auto-disturbance rejection controller and with a better dynamic，static and robust performance.
Preparation and Research on the Lateral Elastic Modulus of the MnO2 Nanowires
Authors: Jiang Yong , Deng Jian Cheng , Ding Yan Huai , Yin Jiu Ren , Zhang Ping
Published: March 2013

MnO2 nanowires with large aspect ratio were successfully synthesized via a hydrothermal method. In this method, Mn(NO3)2 was as a source of manganese and NH4NO3 as an oxidant. The structure and morphology of the MnO2 nanowires were characterized by X ray diffraction (XRD) and scanning electron microscope (SEM). Their lateral elastic modulus was characterized via a nanoscale three-point bending test by atomic force microscopy (AFM) equipped with picoforce. The results indicate that the crystal form of MnO2 was β-MnO2. The elastic modulus of the nanowires decreased with the increase in nanowire diameter. This elastic modulus was in the range of 33.36-77.84GPa as the diameter ranged from 240 to 185nm.
Design of the Approved Low Power Energy Recovery Logic Circuit
Authors: Shi Jian Ying , Li Hui Ya , Xu Yan Bin
Published: March 2013

An approved energy recovery logic circuit (AERL) was designed in this paper. In order to further reduce the power consumption of energy recovery logic circuits, the NMOS transmission gate and NMOS bootstrap technique ware used. The characteristics of the AERL circuit ware simulated using 0.5 micrometer BSIM3V3 spice models in HSPICE. The results show that the AERL circuit has much lower power consumption compared with PT-BCRL, BERL, ECRL and 2N2N-2P logic.
Dynamic Observer-Based H∞ Control for Networked Control Systems in Multiple-Packet Transmission with Random Delays
Authors: Wen Dan Li , Wang Xiao Dan
Published: March 2013

Dynamic observer-based H∞ control for NCSs in multiple-packet transmission with random delays was discussed. The non-convex problem was converted into an LMI with matrix equation constraint. The H∞ control design which guarantees exponential mean-square stability and the H∞ performance level of the closed-loop system were given. The result shows that a numerical example presented here illustrates the effectiveness of the proposed method.
Inter-Harmonics Analysis Based on the STFT Applied to the Power System
Authors: Guo Hui , Gan Shu Chuan , Wu Hao
Published: March 2013

This paper introduces a method of analyzing the time-frequency characteristics for inter-harmonics by Short Time Fourier Transform (STFT). Compared with the traditional arithmetic, the STFT can acquire more precise results and provides theoretical base for inter-harmonic detection. The STFT is used to analyze the inter-harmonics by selecting proper window slides function in Matlab which can acquire more precise resolution for the time-frequency characteristics. This method is useful to eliminate the inter-harmonics in power system. So the quality of power energy can be further improved.
Minimum Zone Evaluation of Symmetry Error for Flatness to Flatness Based on the New Generation GPS
Authors: Qian Qian , Huang Mei Fa , Li Huan Yu
Published: March 2013

Least square method (LSM) is the most popular method used to evaluate machining error nowadays. However, LSM is likely to overestimate the error value, therefore its solution is only approximate and rather than minimum. In order to obtain the minimum, we study the principle of the minimum zone tolerance method (MZT), analyze the characteristics of the new generation GPS, and give the minimum zone mathematic model of the symmetry error for flatness to flatness. For the purpose of optimizing the mathematical model, this paper describes the application of adaptive genetic algorithm to achieve the best estimation. Simultaneously, the process of optimization is realized by MALTAB. Finally, the experiment shows that the evaluation results of MZT is better than evaluation results of LSM.
Design of Location and Tracking System for Special Crowd Based on ARM
Authors: Xiang Wei
Published: March 2013

This paper addresses a new design scheme of location and tracking system which can be used suitably by special crowd .The architecture and working theory of this system is introduced in details. The system uses the ARM microprocessor S3C240 as a control unit to combine with GPS and GSM modules.RFID and GPS technologies are combined to achieve positioning in this design, which can realize location and tracking both inside and outside of the designated area. It has the characteristics of rapidity, real-time, portabilty, accuracy etc.
Based on the Hybrid Genetic Simulated Annealing Algorithm for Solving Rectangle-Packing
Authors: Linghu Yong Fang , Shu Heng
Published: March 2013

The improve hybrid genetic algorithms is proposed using the notion of species for solving rectangle-packing problems.This can control the rate of the variation,which makes result to the best.The rectangle-packing is irregular objects use them of the best rectangle to replace.The experiment results show hybrid genetic algorithms is kind of efficient and reliable optimization arithmetic and it has determinate applied value.
Multiscale Image Segmentation Using Energy Minimization
Authors: Zhang Yin Hui , Wang Sen , Shi Zhong Hai , He Zi Fen
Published: March 2013

We consider the role of multiscale prior information of the object in the form of a Bayesian framework to address the posterior inference problem. The multiscale prior is implicitly estimated from the given image. We show how the multiscale prior effectively exploits the available image data for hierarchical modeling and exploiting posterior inference scheme to determine the posterior likelihood at each iteration with definite number of iteration steps. Extensive experiments show that this method achieves robust multiscale image segmentation results in the presence of dynamic Gaussian noises.
Fabrication of Hollow Microneedle Arrays Based on Special X-Ray Exposure
Authors: Li Yi Gui , Sugiyama Susumu
Published: March 2013

Two methods for fabricating hollow micro needle arrays have been described. One method is that fabricating hollow micro needle array based on double X-ray exposures-----one exposure is normal X-ray exposure with X-ray mask and the other is X-ray exposure without X-ray mask. The other method is based on moving mask X-ray exposures plus an alignment X-ray exposure. The feasibilities for the hollow micro needle arrays were demonstrated by fabricating 25 micro needles in a 5x5 mm2 polymer chip.
Modeling of Nucleated Cells and their Variety Effect on Light Holographic Characteristics Based on VirtualLab Technique
Authors: Lv Cui Hong , Wang Ya Wei , Shang Xue Fu
Published: March 2013

The phase images of cells and tissues are of great importance for obtaining their morphological and dynamics information. However, because of the uniform optical path-length of a light field passing through the inhomogeneous cells whose nuclei’ shape and structure are different but with equivalent physical thickness, we can not identify their subgroup just from their phase images, since their wrapped phase images have similar shape. Thus we put out a new idea that uses their scattering distributions as a auxiliary criterion for identifying cells with different nuclei structure. We built the ellipsoidal models to denote the cells’ external shape and placed three kinds of nuclei, such as hexahedron, cylinder and spheroid, into the center of ellipsoids to compose nucleated leucocytes. Employing the VirtualLab software to carry out the simulations, we first prove that, for cells with different nuclei structures, their wrapped phase distributions indeed have similar shape. Then after analyzing the results of scattering simulations, we obtain some important scattering characteristics related with their different nuclei’ shape and structures which are very useful for helping us to identify blood cells’ subgroup and can also provide good guidance for experimental research on inhomogeneous cells.
Nutrient Removal from Polluted River Water by Combining Vertical and Horizontal Subsurface Flow Constructed Wetlands
Authors: Qin Cheng Xin , He Gang , Duan Yu Huan , Pang Xiao Ping , She Zong Lian
Published: March 2013

A lab-scale hybrid constructed wetland system was constructed to purify polluted river water. The system was composed of a first stage of the vertical subsurface flow filter, followed by a second stage of horizontal subsurface flow bed. Both beds used furnace slag with a size of 4-60 mm for the main layer. The system was continuously fed. Different depths of unsaturated layer (0 cm, 15 cm and 30 cm) in vertical filter were tested. The unsaturated layer of 30 cm in vertical filter presented the most effective ammonia removal of 89.1%, while lowest NO3--N removal rate of 74.1% for the system. High TN removal efficiencies (77.3%-81.0%) could be observed during operation of three depths. The removals of COD and TP were in the range of 97.1%-98.4% and 76.4%-88.9%, respectively.
Explication from Chinese Traditional Dwellings to Modern Ecological Architecture Design
Authors: Pan Ying , Zhao Xiao Feng , Han Yong
Published: March 2013

All kinds of Chinese traditional dwellings are naturally ecological architecture because of their coordination with environment and nature. Firstly, this paper describes the concept and meaning of Chinese traditional dwellings and ecological architecture, analyzes and summarizes the eco-design strategy of Chinese traditional dwellings, including combination with topography, adaptation to climatic, using local materials. Besides, discusses the architectural characteristics, such as patriarchal system concept, regional culture customs. By which, extends to the strategy of modern ecological architecture design, for instance, rooting in particular geographical environment, focusing on the regional cultural heritage and Keeping up with the Times Innovation opens up new ideas for further research and design of the ecological architecture.
Performance of Hybrid Anaerobic Baffled Reactor in Treating Wastewater with High Strength of Suspended Solids
Authors: Li Xiao Rong , Zhang Ling , Qin Juan Juan , Li Xia , Chen Jun Ning , She Zong Lian
Published: March 2013

Operating anaerobic reactors at high strength of suspended solids (SS) can lead to instability and high concentration SS in effluent. To overcome these limitations, anaerobic baffled reactor (ABR) was modified by enlarging the first compartment and filling carriers in up-comer regions to produce the hybrid anaerobic baffled reactor (HABR). Consequently, more favorable conditions were created in the first compartment such as longer hydraulic retention time, better settlement characteristics and longer cell retention time. The carriers improved the retention of SS and cell across the reactor. An ABR with enlarged first compartment (no carriers) was used to compare the performance. The influent COD and SS concentrations were increased from 700 and 300 to 7000 and 2800 mg/L, respectively. After a 187 days operation, with influent COD and SS of 7000 mg/L and 2800 mg/L, both HABR and ABR kept an efficiency of higher than 94.0% in treating COD and an efficiency of higher than 93.0% in removing SS. Higher removals of COD and SS were observed in the HABR than in the ABR. At the same time, performance of HABR was more stable than that of ABR.
Experimental Research on Elastic Modulus and Compressive Strength of High-Strength Concrete after Fire
Authors: Shi Xin Lei , Ding Yong , Yao Zhi Kun , Zhou Li Ping
Published: March 2013

The bottom surface of the bridge beam, which is made of C50 high-strength concrete, is heated to 800°C in fire-resistant experiment. Then the elastic modulus and strength of the concrete are measured by the rebound method and core sampling method, and the test results are used to validate the theoretical methods. The study shows that the strength and elastic modulus of concrete decrease with the increasing of temperature. The strength from the current theoretical analysis agrees well with that from the experiment. But for the elastic modulus, there is a great difference between the theoretical and experimental analysis. The strength of the concrete after fire gotten from the rebound method has a bigger error than that from the core sampling method, so that the core sampling method should be used in preference.
Effect of Axial Compression in the Basement Composite Beam Controlled by Flexure
Authors: Kim Seung Hun , Seo Soo Yeon , Cho Chang Geun
Published: March 2013

In the newly developed excavation system for construction of basement of building, steel elements plays a role as temporary member before casting floor concrete, but it do behavior as composite beam mixed with concrete after floor slab has been casted. That is, it is necessary to review if axial stress loaded in steel beam can be conveyed properly to slab, as casting concrete slab under conditions of application of compression to the steel beam In this manner, this paper presents the experimental result of the composite beam subjected to both constant axial load and variable vertical load. Main parameters in the test are magnitude and loading time of axial force. As a result, it was found that there was no effect on the flexural strength according to the timing of compression and axial force. The flexural strength of the composite beam subjected to both a constant axial compression and increasing vertical load could be predicted with somewhat safety by using code equations.
Strategies and Empirical Research for the Development of New Rural Community Space in West Sichuan
Authors: Yang Chun Yan , Han Xiao , Gao Bo
Published: March 2013

The paper aims to have a clear image on rural community's living spaces in West Sichuan,China and forward ideal planning strategies. The empirical research in Heming Village is a case study with abundant interviews and site observations. Based on these first-hand data,A new developing module can be set up which integrate Chinese tradtional couryard and modern living apartment.Via analysing the case study,these strategies creatively sum up vernacular living's advantages and lead to a sustainable development for Chinese new rural communities.
Urban Form Developing Strategy Research of Medium and Small Towns in Western Sichuan Plain
Authors: Han Xiao , Yang Chun Yan , Peng Yi Min
Published: March 2013

Under a new economic and social background, urban form evolution showed new characteristics. Summarizing the new impact factors and mechanism of urban form development would be a beneficial supplement and perfecting of current urban planning theories. Urban form research on the towns in Western Sichuan Plain has its own local characteristics and practical significance. This essay began with the type research for the urban form of medium and small towns in Western Sichuan Plain, concluded the characteristics of urban form, looked into the evolution law from the changes of interior structure and exterior outline and then forwarded the developing strategies of those towns in Western Sichuan Plain.