bluuebunny/crossref_metadata_2025 huggingface dataset:
Synthesis and Application of Molecularly Imprinted Sol-Gel Film for Simultaneous Determination of Multi-Component Pesticide Residue
Authors: Ge Shen Guang , Zhao Pei Ni , Yu Jing Hua , Huang Jia Dong
Published: August 2011

In this paper, three kinds of molecularly imprinted sol-gel film (MISF) which have good thermal and chemical stability and three-dimensional network porous structure have been developed. The material was synthesized by sol-gel technology using lambda-cyhalothrin, trichlorphon and beta-cyfluthrin as model analytes. The special structural behavior makes the material have good capability to seizure and capture template molecules which enhanced the MISF’s recognition efficiency and the property of separation and enrichment. The material was environmental friendly and easy to operate. The binding characteristic of the imprinted film to the three pesticides was evaluated by equilibrium binding experiments. The SEM of the three MISF has been performed to characterize the morphology of MISF. The MISFs were combined with chemiluminescence (CL) technology by modifying the sol-gel into 96 micro-well plate to establish one molecular imprinting- chemiluminescence (MI-CL) sensor which realized high selectivity, sensitivity and high throughput simultaneous assay of three pesticides. The proposed method was successfully applied to the simultaneous determination of multi-component pesticide residue in foodstuff.
The Preparation of TiO2 Nanotube Arrays
Authors: Pang Lai Xue , Cuan Peng Fei , Shi Hong , Tang Xin De
Published: August 2011

Vertically oriented, highly ordered TiO2 nanotube arrays were fabricated via electrochemical anodization of high purity Ti sheet and Ti foil, which is increasing importance due to their impressing properties in a variety of applications including dye-sensitized solar cells, hydrogen generation by water photoelectrolysis, potocatalysis, and gas sensor. The well aligned TiO2 nanotube arrays by potentiostatic anodization of Ti foil (with 0.3mm thickness) were constructed. We have achieved the self-aligned high ordered nanotube arrays in aqueous electrolyte containing HF and ethylene glycol electrolyte containing NH4F. Depending on the fluoride ion mobile velocity, the resulting nanotubes arrays exhibit the different morphology. The elaborated electrolyte on the morphology of the self-organized nanotubes arrays was investigated. Thermal annealing on the anodized Ti induced crystalline formation, which is confirmed by Raman spectroscopy measurement.
Study on Hydrothermal Synthesis of LaPO4:Eu3+ Materials
Authors: Zhu Jun Shao , Wang Xin , Zhang Fei Fei , Kang Rui , Liu Qiang
Published: August 2011

LaPO4:Eu3+nanoparticles were prepared by the hydrothermal synthesis method at different temperatures. The phase composition and microstructure of nanoparticles were characterized by XRD (X-ray diffraction) and SEM (Scanning electron microscopy), respectively. The results reveal that the phase composition of the powders is dependent on the water bath temperature but the microstructure has little effect. The doped powders can be well crystallized at 120°C with the hexagonal monazite-type structure of the LaPO4phase. The monoclinic structure of LaPO4phase generated as the temperature increases. The sample has pure monoclinic structure of LaPO4phase when the temperature increased to 200°C. It has been shown that all the nanocrystals obtained at different temperatures present a long rod-like shape. The analysis of the fluorescence spectra shows that the luminous intensity of the monoclinic structure of LaPO4:Eu3+is stronger than the hexagonal structure.
Preparation and Properties of Oxidized Coal/Polyaniline Composite Material
Authors: Fan Xiao Ping , Zhou An Ning
Published: August 2011

Semi-interpenetrating polymer network of coal/polyaniline (PANI) composite material were prepared by in situ polymerization. Raw coal was oxidized in different conditions by H2O2 and HNO3, respectively. The total acidic groups analysis, Fourier transform infrared (FTIR) spectrum, and conductivity test of the raw coal and the oxidized coal/PANI composite material were conducted. The results showed that the increases of the carboxyl groups and the hydroxyl groups were mainly attributed to the hydrolysis of the weak ether link and the transform from the carboxylate to carboxylic acid. These increases were benefit to the reaction of coal and PANI, and consequently enhanced the conductivity of the composite material. The maximum conductivity of oxidized coal/PANI reached 4.72×10‑1 S/cm.
Synthesis and Character of Fluorescence Reagent 3-P-Nitrylphenyl-5-(2'-Sulfonophenylazo) Rhodanine
Authors: Wang Shou Mei , Ge Shen Gгang , Yan Mei , Yu Jing Hua
Published: August 2011

A new type rhodanine ramification 3-(4'-methoxyphenyl)-5 (2'- arsenoxylphenylazo)- rhodanine (4MORAAP) was prepared as fluorescent reagent in this paper. A new pectrofluorimetry method was proposed to determine the trace bismuth based on the reaction between potassium periodate and 4MORAAP. The fluorescence intensity was found to be quenched by the oxidation of 4MORAAP by potassium periodate with bismuth as catalyst in the buffer medium of potassium hydrogen phthalate-sodium hydroxide (pH=5.2). Under the optimum conditions, the fluorescent intensity was correlated to be linear with the concentration of bismuth over the range of 2.0×10-7-1.8×10-6g×L-1and the detection limit was 2.9×10-8g×L-1. The relative standard deviation (RSD) was 2.4 % for determined1.0×10-6g×L-1bismuth (n=11). The method was proved to be sensitive and selective and was successfully applied to determine trace bismuth in domestic water
Ground State and Transport Property in Superconductors with Artificial Pinning Arrays
Authors: Ren Qing Bao , Zhou Zhen Chun , Zheng Jun , Luo Meng Bo
Published: August 2011

The dynamics of a two-dimensional vortex system in superconductors with periodic artificial columnar pinning is studied. The ground state at field B = 3Bf can be either anisotropic or isotropic, dependent on pinning strength and size, here Bf is the matching field where the number of vortices equals that of pins. The transport curves are dependent on the ground vortex structures and anisotropic ground structure may result in anisotropic velocity-force curve. Results indicate that the ground structure can be detected from the transport property. We also discover that a jump in velocity-force curve accompanies a structure transition.
Surface Oxygen Diffusion Hardened Titanium Material TC4
Authors: Chen Chang Jun , Cao Qin , Xu Xing , Ma Hong Yan
Published: August 2011

In this study, surface oxygen diffusion-hardened treatment for TC4 titanium alloy was carried out to enhance the wear and corrosion resistance. The surface oxygen diffusion-hardened treatment was performed in an electrical resistance furnace under atmosphere. Characterization of modified surface layers was made by means of microscopic examinations, microhardness measurements and X-ray diffraction (XRD) analysis. The wear resistance of both treated and untreated samples was evaluated. The accelerated corrosion tests in HCl solution was used to determine the corrosion resistance. The corrosion and wear resistant surface layers were obtained after treatment. The surface layers mainly consisted of rutile TiO2. A significant increment in surface hardness was achieved due to the formation of an oxygen diffusion zone. Corrosion and wear resistant surface on TC4 were obtained after the formation of diffusion zone.
Investigation of Cleavage Fracture Behavior in Notched Specimens of a Low Alloy Hot Rolled Steel 16MnR
Authors: Liu Yan Guo
Published: August 2011

The cleavage fracture behaviors are studied in notched specimens of a low alloy hot rolled steel 16MnR. The results show that two types of cleavage initiation sites are existed in notched specimens, one being related to the inclusions ahead of notch root (IC type) and the other related to inclusions located ahead of string cracks far from the notch root (SIC type). The types of initiation sites are influenced strongly on temperature, changing from IC type at -196°C to SIC type at -130°C. In both IC and SIC initiation mechanisms, the crack nucleation is induced by inclusions and the final fracture is controlled by propagation of a ferrite grain-sized crack into matrix grain. The cleavage fracture of IC initiation type in notched specimens satisfies a dual-criterion model, i.e. a critical plastic strain ep ³epc for initiating a crack nucleus and a critical tensile stress syy³sf for its propagation. While for SIC initiation type, the dual-criterion model is evolved with the expression of ep+eps³epc and syy+syys³sf.
Coating of Electrode by Myristic Acid via Microwave Reaction
Authors: Chen Wen Jun , Gui Chi Bin , Sun Ji
Published: August 2011

Electrodes can absorb moisture easily so that the diffusible hydrogen is quite high in the weld bead. Fe3O4 powder is used to promote the reaction of myristic acid and the electrode surface, and reduce the diffusible hydrogen, because of its excellent microwave absorption property. Electrodes are immersed to the light petroleum solution which contains myristic and Fe3O4 particles, then they are put into the microwave oven and become water-resistant . The results of FT-IR and SEM microscope indicate that Fe3O4 powder absorb microwave and melt myristic acid to form the water-resistant film. The best ratio of myristic acid in the petroleum ether is 18% and the diffusible hydrogen of the deposited metal of microwave treated electrode decreased to 83% of the untreated electrode.
Durability of Mechanically Loaded Strain-Hardening Cement-Based Composites (SHCC)
Authors: Cao Wei Qun , Tian Li , Zhao Tie Jun
Published: August 2011

Strain-hardening cement-based composites (SHCC) resist increased tensile stress after first crack formation, over a significant range of tensile strain. This increased strength and strain capacity is achieved by effective crack bridging by fibres, across multiple cracks of widths in the micro-range. Whether the crack width limitation translates into increased durability through retardation of ingress of moisture, gas and other deleterious matter, is scrutinised in this paper. The potential of the comparatively new composite material becomes obvious, yet it is clearly outlined that further research is necessary before we fully understand the basic mechanisms underlying durability of SHCC.
Microstructure Evolution of Mg-6Zn-6Al Magnesium Alloy during Semi-Solid Partial Remelting
Authors: Huang Xiao Feng , Feng K. , Ma Y. , Yan F.Y , Chen Ti Jun
Published: August 2011

A new magnesium alloy, named as Mg-6Zn-6Al(ZA66), using for thixoforming production has been developed. The microstructure of the material during partial remelting holding in the semi-solid state was characterized. The results indicate that non-dendrite microstructure in ZA66 magnesium alloy billets can be obtained, but the proper partial remelting temperature and holding time should be select. After being treated at 575°Cfor 20 min, the ZA66 alloys can obtain a non-dendritic microstructure with finer unmelted primary solid particles (37 μm) and shape factor about 0.6. With the increasing holding temperature from 575°C to 590°C,the average size of unmelted primary solid particles increases and globular tendency becomes more obvious.
The Synthesis of P-Sulfonatephenylazocalix[8]Arene and its Analytical Application
Authors: Fan Lu Lu , Luo Chuan Nan , Qiu Hua Min , Lv Zhen , Lu Fu Guang
Published: August 2011

A new kind of fluorescence spectrometry method for the determination of Rutin has been developed in the presence of p-sulfonatephenylazocalix[8]arene, which has good solubility in water and spectral activity. Under optimum conditions, the linear range was obtained over the 0.2～4.5μg/mL, and the detection limit was 1.949×10-3 μg/mL. This method was used to determinate the content of Rutin in pagodatree flowers and the results were satisfied. It offered potential advantages of simplicity and sensitivity.
Preparing of Army-Green Ceramic Coating on LY12 Alloy and the Study of Fastness to Ultraviolet Light
Authors: Hao Jian Min , Li Dong Xiao , Chen Hong , Li Lian Ping
Published: August 2011

In this paper, army-green ceramic coating has been obtained by Micro-arc Oxidation, a study of the effects of terminal voltage and colored salt concentration on the thickness, chromaticity and luminance has been made. The performance of anti-aging performance to ultraviolet light of the coatings and anodized oxide film on aluminum by electrolytic coloring was investigated. The thickness, chromaticity ,luminance of the coating were measured .The best sample was obtained at the terminal voltage of 360V and the colored salt concentration of 15g/L, the anti-aging of the army-green coatings to ultraviolet light is apparently better than that of the anodized oxide film by electrolytic coloring.
Process Optimization of Cefradine/ Montmorillionite in Solution Intercalation
Authors: Zhao Yan Zhao , Guo Wen Ji , Wang Lan
Published: August 2011

One-factor-at-a-time design and orthogonal design were used in the experimental design to optimize the process of preparation for Cefradine /Montmorillionite composites in solution intercalation. Experimental results indicate that drug initial concentration was the most significant condition for optimal preparation of composites, intercalation time and reaction temperature were not so significant. In our paper, the maximum drug load occurred at reaction temperature of 60°C with the intercalation time of 2h when the drug concentration (mass ratio of cefradine to MMT) was 2:1.
Dynamics of a Bistable Mechanism with Parallel Beams and Permanent Magnets
Authors: Zhao Jian , Huang Yu , Gao Ren Jing , Wang Hong Xi
Published: August 2011

Besides the three main categories of bistable mechanisms such as latch-lock mechanisms, hinged multisegment mechanisms, and residual-compressive-stress buckled beams, a novel unsymmetrical bistable mechanism with a combined structure of permanent magnets and mechanical beams is proposed, and the bistability of such combined structure is analyzed based on the magnetic-charge model and material mechanics theory. The nonlinear combined force during snap-through procedure is calculated accurately, which is in accordance with that obtained by the experiments. The bistable characteristics such as the threshold snapping force, the traveling range, stable positions, and the elastic reaction force at the stable position can be adjusted freely by changing the magnet structure parameters and the relative distance among the three magnets. Finally, the dynamic response is analyzed theoretically and experimentally, which shows that the bistable structure has a good frequency distinguishing capacity for mechanical shock pulses.
Synthesis of a Novel Cationic Polyacrylamide and Its Application in Flocculation
Authors: Zhao Xiao Fei , Wu De Nan , Ma Chun Xi , Liu Li Xin , Du Jun Tao , Liu Su Min
Published: August 2011

In the flocculation treatment of oilfield sewage, cationic polyacrylamide (CPAM), which was synthesized by the copolymerization of dimethyldiallylammonium chloride (DMDAAC), acrylamide(AM), and acrylic acid(AA), will react with the residue of oil displacement agent, causing the quick crimp of its linear-molecular-structure chain and deteriorating the flocculating effects. In order to solve the problem, cationic polyacrylamide (CPAM) was grafted by a cationic-terminated spheroidal-molecular-structure hyperbranched polymer (CHP), which was synthesized by introducing methacryloxyethyl trimethylammonium chloride (DMC) into a kind of amino-terminated hyperbranched polymer. Both CPAM and grafted CPAM were used in flocculation treatment of simulated ASP oilfield sewage. The comparison results in flocculating effects indicated that the flocculating effect of grafted CPAM is greater than CPAM, its optimal dosage is 12.5mg/L, and its transmittance of the treated sewage reached 98.6%.
Research on Annealing Temperature of SiO2 on Si Substrate
Authors: Lv Hao , Ding Yao Ming , Liu Ai Mei , Tong Ju Fang , Yi Xu Nong , Li Qian Guang , Chen Chen , Shi Bang Ren
Published: August 2011

Silicon dioxide films; radio-frequency magnetron sputtering; annealing temperature Abstract. Silicon dioxide (SiO2) films are fabricated on single crystal silicon substrate by radio-frequency magnetron sputtering (RFMS) technique and annealed in electric furnaces at 800°C and 1180°C to form uniform, transparent and compact silica. The surface morphology and roughness of the films are characterized by an atomic force microscopy (AFM). X-ray diffraction (XRD) is employed to analyze the crystalline of the thin films. The chemical composition after annealing is analyzed using X-ray photoelectron spectroscopy (XPS).
Study of Dynamic Characteristic of Friendship Avenue Bridge
Authors: He Wei , He Rong , Yan Sheng Tai
Published: August 2011

Friendship Avenue bridge was a concrete-filled steel tube arch bridge (CFSTAB). As a new type of bridge, CFSTAB was widely constructed and rapid developed in China. Because of its merits, CFSTAB was constructed much more in China. With the span increasing rapidly, and the bridge gradually becoming thin, the long span CFSTAB should be paid more attention for its performance of aseismic, wind resistance and vehicle-bridge vibration.This article described the basic method of dynamic analysis for CFSTAB. And the Friendship Avenue CFSTAB was taken as an example, such as the choice of element types, conducted boundary condition and applying load were described in process of modeling FEM for it, and of which the dynamic characteristics was analyzed by finite element software ANSYS.
ESPI for the Piezoelectric Constant Measurement
Authors: Xu Huan Kun , Chen Li , Ma Bei He , Ma Xiao , Lei Sha , Lin Qin Hua
Published: August 2011

This paper describes the principle of measuring small displacement of the object by using electronic speckle pattern interferometry (ESPI). The piezoelectric constant of Lead Lanthanum Zironate Titanate(PLZT) piezoelectric ceramics is determined with ESPI. Compared with other methods , this method is simpler and is operated more easily.The accuracies of ESPI and electrical method are almost at the same level, which shows that it is avalible to measure piezoelectric constant.
Thermally Induced Pitch Gradients in Side-Chain Cholesteric Liquid Crystalline Polymers
Authors: Xiao Jiu Mei , Yu Li Long , Zhao Dong Yu , He Wan Li , Cao Hui , Yang Huai
Published: August 2011

It is reported that a pitch gradient is formed in a side chain cholesteric liquid crystalline polymer (ChLCP) through a novel method. Heating up the ChLCP within the temperature range of the cholesteric (Ch) phase leads to the first availability of its planar texture. Then, the ChLCP film with the planar texture is cooled down to its glassy (G) state in line with the temperature difference between the upper and the bottom substrates. The SEM image indicates clearly a pitch gradient perpendicular to the substrates, and the results of transmission spectra show that the reflective bandwidth of the ChLCP film with the pitch gradient is greatly broadened.
Synthesis and Photoluminescence Properties of the Novel Red Phosphor Gd2MoB2O9: Eu
Authors: He Ling , Sun Wei Min , Ding Yu Tian , Wang Yu Hua
Published: August 2011

A novel phosphor, Gd2MoB2O9:Eu3+has been synthesized by solid-state reaction and its photoluminescence in UV-VUV range are investigated. A sharp excitation band is observed in the region of 120–135 nm, which is related to the charge-transfer (CT) band of Gd3+. The broad band around 135–160 nm can be assigned to the BO3host absorption. The broad bands around 248 nm are assigned to the CT band of Eu3+-O2-. The phosphors emit strong red luminescence centered at about 591 nm, 614 nm and 626 nm due to the5D0–7F1and5D0–7F2transitions of Eu3+. The main emission peak under 254 and 147 nm excitations also shows different shifts with increasing Eu3+concentration. This could be due to the different luminescence sites selected at high doping concentrations of Eu3+. Gd2MoB2O9:Eu3+shows the pure red emission under both 254 and 147 nm excitations.
Nucleation Agent Choice of Li2O–Al2O3–SiO2 Glass Ceramic Having Ideal Micro Spherical Crystal Grains
Authors: Lv Hao , Ding Yao Ming , Liu Ai Mei , Tong Ju Fang , Yi Xu Nong , Li Qian Guang
Published: August 2011

The nucleation and crystallization of Li2O-Al2O3-SiO2(LAS) glass ceramic with one(P2O5, TiO2, ZnF2) and two nucleating agents(P2O5+TiO2, P2O5+ZnF2) are investigated by the differential thermal analysis(DTA)，X-ray diffraction(XRD) and the scanning electron microscopy(SEM). Research results show that the LAS glass ceramic with nucleating agent of P2O5can obtain ideal micro spherical crystal grains and the crystallization behavior can be better controlled.
Design of Holmium Laser Treatment Instrument Control System
Authors: Zhou You Jie , Xiong Chun Hua , Lu Chang Bo
Published: August 2011

Based on current market of the holmium laser lithotripsy device power by manual control, the image recognition technology are presented by which are used in the stone therapy. ,in this paper，the core circuit, the external circuit and image recognition part of the circuit and software are discussed, and the corresponding Design ideas and programs is given. The system which can not only generate reliably, practically, high intelligently, but also can be widely applied to the treatment of ureteral stones, bladder stones and kidney stone.
Research on Electrochemical Properties of Alpha-Ni(OH)2 Prepared by Electrodeposition Method in the Ethanol and Water System
Authors: Jin Zheng , Li Bo Hong , Qin Chuan Li , Ren Xiao Min , Yan Shan Tao , Bai Xu Duo
Published: August 2011

Electronic characterization, Electrochemical properties, Electrochemical techniques, Abstract. In this paper, the α-phase Ni(OH)2was directly deposited on the surface of foam nickel by electrochemical deposition technology. The characterization of the α-phase Ni(OH)2was studied by using X-ray diffraction(XRD), scanning electron microscopy(SEM), cyclic voltammetry(CV) and the constant charge-discharge. The specific capacitance of the a-phase Ni(OH)2electrode, measured using cyclic voltammetry at scan rate of 1mV•s-1, was found to be 2826.77F•g-1. For a simple supercapcitor, the highest specific capacitance(475.76 F•g-1at 30mA) is obtained at deposition voltage of 2.5V and deposition time of 50min.
Study on Thermal-UV Curing Process of Waterborne Dual Crosslinkable Coating Material
Authors: Liang Liang , Guo Jing , Zeng Fan Chu
Published: August 2011

A waterborne thermal-radiation dual crosslinkable polyacrylate was prepared by introducing an AAEM functional monomer and a C=C double bond by Michael Type Addition in a relatively mild condition. The optimal synthesizing and curing processes were also studied. The performance of this coating is excellent: the film is hardness 2H, alkali-resistance (5% NaOH solution) >20h, ethanol-resistant >150 times of rub without film breaking.
A Double Imprinted Organic-Inorganic Hybrid Sorbent for Selective Separation of Lead from Aqueous Solution
Authors: Wang Li Min , Li Ying Hua , Wei Wei
Published: August 2011

A novel ion-imprinted organic-inorganic hybrid sorbent was synthesized and characterized by FT-IR and nitrogen gas adsorption-desorption. The adsorption property and selective recognition ability of the imprinted sorbents for the lead ion were studied. Results showed that the uptake capacities and selectivity coefficients of the double imprinted sorbent were much higher than that of the non-imprinted sorbent. The adsorption capacity of the double imprinted sorbent is 545.6 mg•g-1. The largest relative selectivity coefficient between Pb (II) and Cd (II) was 192. This results suggested that the new sorbent can be used as effective solid-phase material for the selective preconcentration and separation of Pb (II) in environmental water samples.
Lignin Separation and Antioxidant Capacity from Acanthopanax senticosus Remainders Using Acetic Acid-Water System
Authors: Zhu Ming Hua , Fang Gui Zhen , Han Shi Yan , Rong Hai Hong , Guo Jun , Shi Yong Chun , Duan Heng Yong
Published: August 2011

Lignin was extracted from Acanthopanax senticosus remainders after pharmaceutical production process, with acetic acid-water as extracting reagent. Four factors effects, namely reaction temperature from 160°C to 220°C, reaction time from 40 min to 100 min, acetic acid concentration from 50% to 80% and solid-liquid ratio from 1:40 to 1:5, were studied and optimized by a four-level orthogonal array design (OAD) on lignin antioxidant capacity. The results indicated the reaction temperature and reaction time were significant factors among these factors. At the same lignin solution concentration, the acetic acid lignin antioxidant capacity was better than that of Kraft lignin, but much lower than that of butylated hydroxyanisole (BHA).
Robotic Cross-Lines Laser Indicator and Range Finder
Authors: Chen June Wen , Duan Jing Bin , Wu Shih Jui , Chen Yi Shan , Chiu Li An , Kuang Ya Ping
Published: August 2011

A novel robotic vision and control system using cross-lines laser indicator and range finder simultaneously is developed. This modular have fine crossed lines indication of 1.2mm sharpness at 5 m distance, and simultaneously ranging accuracy of 3 mm up to the range of 100 m. The theoretical derivation, CAD/CAM design, and lens design together with experimental results will be presented in detail.
Preparation and Application of a Stable Biomembrane Mimetic Coating
Authors: Yang Shan , Wang Yan Bing , Gong Ming , Gong Yong Kuan
Published: August 2011

Two kinds of biomembrane mimetic polymers P(MPC-co-SMA) and P(MPC-SMA-TSMA) were synthesized with acrylate monomers 2-methacryloyloxyethyl phosphorylcholine (MPC), stearyl methacrylate (SMA) and 3-(methacryloyloxy) propyltrimethoxysilane (TSMA) by free radical copolymerization in solution with AIBN as initiator. The phosphorylcholine containing copolymers were dip-coated on cover glasses. The hydrophilicity, stability and surface structure of the coatings were measured by dynamic contact angles (DCA) in water. It was found that the coating surfaces were amphiphilic. The P(MPC-SMA-TSMA) coating was more stable than the P(MPC-co-SMA) one in aqueous environment due to crosslinking and grafting. The biocompatibility of the coatings was evaluated by platelet adhesion and protein adsorption. The copolymer P(MPC-SMA-TSMA) can be simply coated on a surface to fabricate a stable biomimetic coating with excellent hemocompatibility.
Rate Optimization Congestion Control Protocol for Wireless Sensor Networks
Authors: Xiao Ping Ping , Tian Yan Tao
Published: August 2011

Congestion is an essential problem in wireless sensor networks. In view of resolving the problem of congestion, a novel congestion control algorithm is proposed based on rate optimization. It performs the estimation of congestion level in the cluster and between the clusters based on the distribution of queue length of the node, and uses the maximum utility function to optimize the sending rate of source nodes. In addition, the algorithm adopts the cluster structure to prolong the system lifetime. The simulation results show that ROCC can prevent effectively and alleviate the congestion, and dynamic adjust the sending rate of source nodes while controlling congestion.
Preparation, Characterization and In Vitro Evaluation of IVM Loaded Poly(lactic-Co-Glycolic Acid) (PLGA) Microspheres
Authors: Li Gui Yu , Lu Xi Hong , Li Xue Hu , Tao Lei , Liang Jian Ping
Published: August 2011

Drug was encapsulated in a novel copolymers of poly(lactic-co-glycolic acid) (PLGA) to investigate the sustained-release formulation of drug loaded polymer microspheres delivery system. Used a modified solid-in-oil-in-water (S/O/W) emulsion solvent evaporation method to prepare microspheres, its morphology and particle size distribution were estimated by scanning electron microscopy (SEM), the profile of in vitro drug release were assessed by High performance liquid chromatography (HPLC). Finally, an stable release buffer was utilized to obtain a detailed drug release profile, which was analyzed by HPLC also. Results showed that the microspheres morphology, encapsulation efficiency and the cumulative drug release efficiency were appropriate for veterinary medicine using. The modified preparation method was simple and optimized, PLGA microspheres with excellent controlled-release characteristics may serve as drug delivery carrier and may prolong the drug sustained-release effect.
Effect of Anisotropic Membrane Surface Modification of Nafion Based Ionic Polymer-Metal Composites
Authors: He Hong Lin , Wang Jun Ping
Published: August 2011

In order to enhance the electromechanical characteristics of IPMCs actuators under low voltage, a set of anisotropic membrane surface modification techniques, including roughness along, roughness across and roughness across both directions, is proposed in this paper. Three groups of IPMCs samples based on corresponding roughness direction have been prepared to validate the these surface modification. Experiments have been made to measure the electromechanical characteristics of the samples. The results show that the IPMCs actuator with micro-grooves being across the length of the IPMCs actuator could improve the IPMCs’ tip blocking force and deflection, and it exhibits blocking forces by 10% larger than the conventional IPMCs while its displacement is approximately 8% larger. We can conclude that an appropriate anisotropic surface modification could be an effective method to create a preferred bending force and to enhance the bending margin of IPMCs actuators.
Strain Hardening Modeling of High-Strength Stainless Steel Tube
Authors: Lu Ruo Dong , Yang He , Li Heng , Wang Ze Kang , Zhan Mei , Tian Yu Li
Published: August 2011

By the uniaxial tensile tests of both the arc and tube section samples, the strain hardening curves of 21-6-9 high-strength stainless steel tube(HSST) are obtained. Considering that the uniform plastic deformation stage of the curve is short and the flow stress in large strain area is unknown for this tube, different strain hardening models have been established based on single and piecewise functions, respectively. By comparing the experimental results and the numerical ones in terms of load-displacement curves, it shows the constitutive model achieved by three Swift fitting functions can better characterize the strain hardening response of the 21-6-9 HSST in large strain region.
A Simulation Study for the Influence of Pulse Heating on Thermal Imaging of Carbon Fiber Composites
Authors: Xie Rui Jun , Ren Peng Fei , Chen Fu Rong , Liu Zhan Jie
Published: August 2011

Transient temperature-fields of carbon fiber composites which contained defects were numerically simulated. When the total heat was constant, the influences of different pulse heating methods on thermal imaging temperature difference and contrast of carbon fiber composites surface were analyzed. The peak values of temperature difference and contrast declined progressively with the progressive decrease of heat flux, and all the peak values postponed. With the increase of initial heat and the decrease of second heat, the peak values of temperature difference and contrast increased progressively at the first emergence, and declined progressively at the second emergence. With the progressive increase of interval, the extreme values of temperature difference and contrast were almost invariant at the first emergence, and declined by degree at the second emergence.
Welding Technique for New High Speed Railway Track Key Part
Authors: Hua Peng , Wang Chun Hui , Du Li Xin
Published: August 2011

With the development of continuous welded rail (CWR) in China high speed railway, the innovative study has been carried out for the welding technique of track key part. Firstly, the paper introduces the traditional rail welding technique and its problems in China, and then, it proposes the new “SQ” gas welding technique on that basis, finally, it describes “SQ” gas welding technique in terms of technical feature, flow, economic benefit and application, which will be conductive to China railway track welding.
Finite Element Analysis on Thermal Characteristics of Lathe Motorized Spindle
Authors: Ma Ping , Zhou Biao , Li Hai Peng
Published: August 2011

Abstract．High-speed motorized spindle is a promising technology widely used in high speed machining．The lathe motorized spindle is the key component of the high speed NC lathe and the thermal characteristics of the lathe motorized spindle is one of the major factors influencing the performance of the machine tools．In order to improve the accuracy and reliability of the high speed NC lathe，the thermal characteristic of the high speed NC motorized spindle has been studied in this paper．Firstly，the structure feature of the spindle has been introduced and two major internal heat sources of motorized spindle have been investigated．Secondly，the heat transfer coefficients of the major components of the lathe spindle have been conducted．Then，the 2D temperature field model has been developed with finite element method．Based on it, the temperature field and temperature rises of the spindle have been simulated and the reasonability of temperature distribution of the spindle unit has also been discussed．The research results provide the reference to evaluate of the thermal behavior of the high speed NC motorized spindle．
Study on Properties of Carbon Particle Modified Silicon Carbide Composite Ceramics
Authors: Lu You Jun , Shen Hong Fang , Wang Yan Ming
Published: August 2011

High-temperature mechanical properties, machinability, oxidation resistance and thermal shock resistance of different content of carbon particles modified silicon carbide composite ceramics (Cp/SiC) prepared by pressureless sintering techniques were studied. Adhesion of Cp/SiC to melted glass under 1000°C was also observed. The results showed that 15-Cp/SiC had the optimum machinability and it also did not adhere to melted glass at high temperature. And flexural strength, hardness, and fracture toughness of 15-Cp/SiC is 136.5MPa, 274.6kgf/mm2, 2.58MPa•m1/2 respectively. The good performance of Cp/SiC made it possible to be used as high temperature glass fixture, which means that Cp/SiC can not only improve the service life of fixture materials, but also broaden the application fields of SiC ceramics.
Visible Light Photocatalytic Activity of Zn-Doped Bi-Mo Complex Metal Oxide Prepared by Hydrothermal Synthesis Method
Authors: Bi Jing Hong , Chen Bing Qin , Liu Ming Hua
Published: August 2011

Zn-doped Bi-Mo complex metal oxide photocatalysts were prepared via hydrothermal process. The prepared samples were characterized by X-ray powder diffraction and UV-vis diffuse reflectance spectroscopy. The results display that Zn doping can not alter the crystal form of the complex metal oxide and the band gap of the samples are all about 2.56 eV. The photocatalytic activity of the samples for the decomposition of Rhodamine B under visible light irradiation shows that the concentration of Zn2+ has great effect on the photocatalytic activity and the best photocatalytic activity is obtained by the sample with 0.6% Zn doping amount.
Synthesis of Self-Assembly Au Nano-Particles Based on Sodium Citrate-Tannin Reduction Method
Authors: Wang Dau Chung , Chen Shinn Hwa , Chen Gen You , Chen Ken Yen , Tsai Cheng Hsien
Published: August 2011

Recently, self-assembly synthesis of metal nano-particles has attracted great interest due to its unique size dependent properties. In this study, an easy synthesis would be developed to form Au nano-particles which are without toxicity. The Au particles could be applied in biological and biological toxicity experiments. Some phenomena could be discovered in this paper. First, the concentration ratio of Au and trisodium citrate would be adjusted to control the Au nano-particles size. And the particle size is limited because of the size dependent energy would be discovered in this paper. The minimum particle size is also found. The one phase liquid reduction method is easy and without toxicity, it is low-cost, high-throughput, and suitable to be applied in biological and biological toxicity studies.
The Study of Shrink Fit Design Empirical Formula
Authors: He Yang , Li Fang Yi , Wu Chun Hu , Ma Shi Lei
Published: August 2011

The regulation of stress concentration generated by the edge effect of shrink fit is studied in this paper. Firstly, experiment is designed with Latin hypercube (LH) method; then the maximum compound stress of the shrink fit is obtained by means of FEM; at last, the relationship among the maximum compound stress, shrink range, dimensional sizes of the shrink fit parts and material properties is fitted into a empirical formula via BP neural network. The formula is capable of offering good forecast to the maximum compound stress, and makes up the deficiencies of the design of shrink fit by using elastic mechanics (EM). At the end of this paper, the shrink fit of the drive axle housing is optimized with the empirical formula, and the maximum compound stress is abated greatly on the condition of ensuring the normal use of drive axle housing.
Determination of Phase Transformation Point of New Type Ti-5Al-3.3V-8Mo-10Nb-1.0Zr-0.5Cr Alloy
Authors: Liu Shuang Jin , Cai Fen Fei , Cui Chun Xiang , Yao Xun
Published: August 2011

The determination of titanium alloy phase transformation point is very important for phase transformation is the theoretical basis of titanium alloy heat treatment. One new type of titanium alloy Ti-5Al-3.3V-8Mo-10Nb-1.0Zr-0.5Cr was designed and prepared, then the (α + β→β) phase transformation point of this alloy was determined using simulation method, calculation method and continuous heating-up method, and the comparison on these methods has been made in accuracy and simplicity. The phase transformation point was obtained rapidly by simulation method with the value of 806°C, it was obtained by calculation method with the value of 804.28°C, According to the results of software simulation method and calculation method ,the phase transformation point 805 is obtained by the continuous heating-up method. Compared the results of three methods, the results measured by three methods are quite approachable, the phase transformation point was 805±1°C, and the software simulation method is the most accurate and simple.
Calculation of Valence Electron Structure of Precipitate Phases in Al-Cu Cast Alloy
Authors: Tian Chang , Wang Rui Chun , Li Run Xia , Li Rong De
Published: August 2011

Based on Empirical Electron Theory in solid (EET) and Bond Length Difference (BLD) the valence electron structures of precipitates in AlCu alloy during aging process were calculated. The results show that the different phase structure factors explain the thermal stability of phases in θ sequence, and the tendency of atoms solution is corresponding with the phase transition during aging from valence electron structure levels, which reveals the inside causes of ageing hardening is closely related to the covalent electron pairs in some bond of the precipitations and matrix.
Puncture Needle Production Process Intelligent Control System Based on Machine Vision
Authors: Qu Ju Bao
Published: August 2011

For the international New invention, that orbital lumbar joint puncture unique technology, Studied and developed intelligent detection and control system of the needle production process based on machine vision. Through the high speed camera gain image of work piece , uses the multi-wavelet transform pre-and double-cubic interpolation to enlarge the image, using least squares support vector machine workpiece quality intelligent detection and identification, according to the process parameters to obtain real-time control of the production process. Experiments show that this system can meet technical requirements, good stability, high efficiency, has a higher value.
Effect of TiC Addition and Cooling Rate on Mechanical Properties of 316L Stainless Steel Composites
Authors: Lin Shao Jiang , Wang Sai Yu
Published: August 2011

The present research work concerns the development of TiC reinforced 316L stainless steel composites through powder metallurgical technology and sintered in vacuum. The effect of TiC particle addition and cooling rate on the mechanical properties of 316L stainless steel composites has been investigated. The results show that increasing the cooling rate caused enhancement of ultimate tensile strength and microhardness. However, the elongation to failure of the composites was decreased with the increase of cooling rate. The addition of TiC particle was found to improve the ultimate tensile strength of 316L stainless steel composites. The highest tensile strength was 648 MPa in specimens containing 5wt.% TiC. Further increase in TiC content to 10wt% results in a reduction in tensile strength to 631 MPa.
Wear Properties of High Volume Fraction SiCP/Mg Composites Produced by Vacuum Pressure Infiltration
Authors: Wang Zhi Tai , Xu Zhi Feng , Liu Wen Na , Li Wen Jie
Published: August 2011

Magnesium matrix composites reinforced by SiC particles of different size have been fabricated by vacuum pressure infiltration to investigate the influence of volume fraction and particle size on wear properties. It was found that the wear resistance of SiCp/Mg composites increased as volume fraction of particles with the same average diameter and reduced with the decrease of average diameter of particle, whereas the grooves furrow and adhesion increase. The influence of particle diameters on wear resistance was more prominent than that of volume fraction. The wear mechanism of composite and matrix alloy were oxidation, adhesive and delamination wear.
Exploration of Environmental Education on Campus-Huanggang River Watershed Protection in Case
Authors: Wang Qing Yu , Li Shi Kun
Published: August 2011

Abstract: To Huanggang River watershed protection, for example, to carry out the exploration of environmental education on campus. River basin water pollution on the East China survey, indicating that the industry, and agriculture are the three sources of life; of the East China River Basin water quality trends and the causes of water pollution in Huanggang River Basin; described Huanggang the importance of water resource protection, and Defining the student's role in the protection of the environment.
A New Optimized Cutting Method Based on Group Technology in the Structural Member Manufacturing
Authors: Qi De Zhong , Rao Yun Qing , Sun Nian You , Chen Qi
Published: August 2011

Considering low utilization rate of sheet metal, the low nature of a complete set and the overmuch work-in-process in the workshop during the process of the structural members of engineering machinery, this paper proposes a new optimized cutting method based on group technology with the basis of present sheet metal cutting. This method adopts the principles of divide and rule, which divides the processing cutting parts into several groups by clustering and deals with them separately. The method has been applied in industrial production and achieved good results.
An Opto-Electronic Integrated Non-Contact Angle Measuring System for Knife Blade Angle
Authors: Shi Wen Qing , Feng Yu Jun , Wang Wen Hua , Li Yong Qiang , Huang Cun You , Xiong Zheng Ye , Tan Zhong Ming , Liang Su
Published: August 2011

in order to measure knife blade angle, which has a serious influence on the sharpness and sharpness retentivity of knives and scissors, a knife blade angle measuring system based on electronics and laser technology is established. This system has many advantages such as a high precision (±1°), convenient and simple operation, cost saving, non-contact, safety and stability, etc. The system is very helpful to improve the product qualities of knives and scissors.
LonWorks Node Achieving Power Line Communication Based on Slave a Parallel Mode
Authors: Yang Shuai , Xue Lan
Published: August 2011

LonWorks technology is a complete development platform used in monitoring network system. In order to improve the real-time of LonWorks node, its master processor AT89C2051 and slave processor MC143150 will realize data exchange each other in Slave A parallel mode. Data transfer mechanism using virtual token passing can solve the issue of master and slave processor seizing the data bus. PLT-22 transceiver featuring a dual carrier and narrow band frequency can complete data communication on LonWorks power line network, the transceiver can overcome the drawbacks of noise sources, attenuation, distortion. Experiments show that LonWorks node achieving power communication based on Slave A parallel mode has good communication and high real-time performance.
The Summarization and Prospection of APF Control Means
Authors: Gui Cun Bing , Guo Chen , Chen Zhong Ren
Published: August 2011

It make a detailed description and instruction with the control condition of the Active Power Filter, at the same time , it also make a comparison with the advantage and the shortcoming one by one , at the end, make a prospection with the developing tendency and research keys.
Research on Feature Extraction of Wheat Leaf Disease Image
Authors: Diao Zhi Hua , Wu Yuan Yuan
Published: August 2011

In order to resolve the problem of not taking into account color, texture and shape features in crop disease intelligent recognition systems, feature extraction method based on three feature types was proposed. Two types of color spaces such as RGB and HIS were considered, and the transformation formula of the two color spaces was improved. Then ten color features were defined and extracted. Meanwhile sixteen texture features were defined and extracted based on gray level co-occurrence matrix. And thirteen shape features were defined and extracted based on invariant moment theory. Finally the feature dataset was received which was suitable for identifying four types of wheat leaf diseases. The results show that the system recognition rate is relatively high, and can meet the practical application requirements.
Simulation Technique of AMESim Applied in Mould Electrohydraulic Servo Control System
Authors: Cheng Min , Xue Shu Qi , Li Ruo Bing
Published: August 2011

Taking electrohydraulic servo control system used in mould oscillation in bloom continuous casting machine as the object of research, AMESim software is used to establish the model of the electrohydraulic servo control system ,also simulate and analysis the system,which theoretically confirms the reliability of the electrohydraulic servo control system.The software is also used for dynamic analysis about the control system.
Application of Fuzzy Adaptive Kalman Filtering on GPS/INS Integrated Navigation System
Authors: Liu Ming Wei , Xiong Fen Fen , Huang Jin
Published: August 2011

A fuzzy adaptive Kalman filtering navigation algorithm is proposed and further applied to the GPS/INS integrated navigation system in this paper. The common Sage-Husa adaptive filtering algorithm and its drawbacks are elaborated. In order to adjust the Sage-Husa adaptive filter to the optimal state to improve the accuracy of the integrated navigation system, the fuzzy logic adaptive controller is used to adjust the weighting form for the covariance matrix of measurement noise to gradually make it approach to the true noise levels. Simulation results show that the proposed algorithm can not only inhibit the filtering divergence but also improve filtering accuracy.
The Research of Strengthening Mechanism on Ferritic Stainless Steel Under Impact Processing
Authors: Zhou Xin Yuan , Wang Yong , Wei Min
Published: August 2011

This paper mainly studies the microstructure and strengthening mechanism of ferritic stainless under laser shock. the mechanical properties and microstructure were observed through the X-ray diffraction and TEM. The results showed that laser induced shock wave peak pressure is higher than the yield strength of stainless steel, the plastic deformation occus under the impact of the role of stress and high strain rate. when the laser power increases, ferritic stainless steel will have an obvious phase transition from the body-centered cubic into hexagonal system.