bluuebunny/crossref_metadata_2025 huggingface dataset:
Feature Extraction Method Based on Moment Invariants
Authors: Li Wan Bing , Quan Hong Wei , Huang Xia Fei
Published: June 2014

To match two or more images originated from the same scenario, a new fast automatic registration algorithm based on sparse feature point extraction is proposed. At the first step, the improved Harris corner detection algorithm is used to get two sets of feature points from the reference image and registration image. Second, a group of sparse feature points are selected from the reference image set as initial control points. Then, the corresponding matching points in the registration image set are searched based on local moment invariant similarity detection. Experimental results demonstrate that this method is fast and efficient.
A Fast Fault-Identification Algorithm Tailored for Optical Interconnection Networks in High-Performance Computers
Authors: Li He
Published: June 2014

Due to integrated positive features of both hypercube and tori, optical multi-mesh hypercube (OMMH) networks in high-performance computers are regarded as a class of promising optical inter-connection networks. This paper firstly derive that the diagnosability of OMMH under the pessimistic strategy is (2n+6)/(2n+6), which shows that the OMMH possesses strong self-diagnosingability. With the improved cycle decomposition method by Yang in J. Parall. Distrib. Comput. [10], a fast diagnosis algorithm to identify all faulty nodes tailored for OMMH, which runs in O(Nlog2N) time is also proposed, where N is the number of the processors of an OMMH.
Packaging Material Barriers Faced by Foods and Agricultural Products Export of China and Countermeasures
Authors: Shao Hong Ling , Cui Hai Xia , Lu Jian
Published: June 2014

Foods and agricultural products safety problems caused by the packaging materials have attracted extensive attention all over the world and some developed countries take it as a technical trade measure to increase the threshold of foods and agricultural products import, which brings about great negative impact to the export countries. Based on the analysis of the packaging material barriers faced by foods and agricultural products export of China, this paper will put forward some countermeasures to break through the packaging material barriers of foreign countries.
Quantitative Risk Assessment and Early Warning for pH Value of Disqualified Imported Textile
Authors: Wei Meng Yuan , Hu Xiang Yuan , Jiang Chun , Zang Jia Xin , Xue Wen Liang
Published: June 2014

The assessment of potential risks posed by PH value in clothing to consumers is of increasing concern worldwide. If the PH value is too high, it is harmful to skin. Some papers focus on hazard assessment and exposure assessment, using quantitative and semi-quantitative method, rather than assessment for the factors related to the PH value. In order to perform early-warning research and risk management, the quantitative risk assessment is used in this paper to analyze the imported textile testing data and find the factors related to the PH value. The data mining technique and K-means algorithm is the core of the method. It can be concluded that the disqualified textiles have relations with main fiber components and fabric color. Then cluster the data by K-means algorithm for every factor, define the different class as related danger level, respectively severe, moderate, light.
Effect of Deficit Irrigation on Root-Shoot Development and Grain Yield of Winter Wheat
Authors: Hu Bin , Zhang Min
Published: June 2014

In order to investigate the optimal water-saving and high-efficient irrigation patterns of winter wheat in North China Plain, during 2010－2011 and 2011－2012 winter wheat growing seasons, 3 irrigation treatments were conducted, i.e., irrigated 120 mm only at jointing stage (T1), irrigated 120 mm only at heading stages (T2), and irrigated 60 mm each at jointing and heading stages (T3), respectively, to study the effect of deficit irrigation on root-shoot development and grain yield of winter wheat in North China Plain. The results showed that under the condition of irrigated 120 mm during the winter wheat growing season, the treatment which irrigated 60 mm each at jointing and heading stages, the leaf area index significantly (LSD, P<0.05) increased at milky stage, which was mainly due to increase the leaf area index at 0－20 and more than 60 cm above the ground surface. The 2 growing season results revealed that dry matter accumulation at maturity stage in T3 was significantly (LSD, P<0.05) higher than those in T1 and T2. Compared with T2, the root length density in T1 and T3 were significantly (LSD, P<0.05) higher below the ground surface 50 cm. The results indicated that irrigated 60 mm each at jointing and heading stages during the winter wheat growing seasons, grain yield was the highest, which could be attributed to significantly (LSD, P<0.05) increase the spike numbers. Under the condition of irrigated 120 mm during the winter wheat growing seasons in North China Plain, it is suggests that winter wheat should be irrigated 60 mm each at jointing and heading stages, to achieve reasonable water use efficiency and grain yield.
Fabrication of Diamond Films on Cu Metal Substrates with Buffers (SiC or MoSi2) by Hot Filament Chemical Vapor Deposition
Authors: Zhao Qi , Dai Ming Jiang , Tan Di , Wei Chun Bei , Qiu Wan Qi , Hou Hui Jun
Published: June 2014

Diamond films were grown by hot filament chemical deposition (HFCVD) on Cu metal substrate with two different buffer layers (SiC or MoSi2) synthesized by using magnetron sputtering technique. The components of films were investigated using X-ray diffraction (XRD) and laser Raman spectrum, and the surface morphology and structure were observed with scanning electron microscopy (SEM). Film adherence was investigated by micro-indentation. The results showed that the diamond films were successfully grown on Cu metal substrate with two different buffer layers. There were cracks on diamond film grown on 3µm SiC buffer layer and some SiC crystal whiskers were observed. Dense diamond films with bad adhesion were observed on 22µm MoSi2 buffered copper substrate. MoSi2 made chemical reaction with CH4 and produced MoC and Mo5Si3 on the process of HFCVD. Conclusion: the 3µm buffer layer of SiC can’t help deposit no cracking diamond film; the 22µm buffer layer of MoSi2 is helpful for depositing good diamond film, but can’t effectively improve the bond strength between diamond film and copper substrate.
Curing Kinetics of Silicone Epoxy Resin Containing Fluorene
Authors: Deng Wei Xing , Zhong Yuan Wei , Qin Jie , Huang Xue Bing , Peng Jin Wen
Published: June 2014

A new epoxy resin based on dichlorosilane and 9,9-bis (4-hydroxyphenyl) fluorene was synthesized to produce a highly heat-resistant network. The chemical structure was characterized with FTIR spectroscopy and 1H-NMR. 4-4′-Diaminodiphenylsulfone (DDS) was used as the curing agent. The curing kinetics of different epoxy/DDS systems were investigated using non-isothermal differential scanning calorimetry (DSC). The results showed that the values of activation energy (E) were affected by the chemical structure of epoxy resin, and BPEBF exhibited lower curing reactivity towards DDS compared to E-51.
Effect of Cu,Cr Co-Doped on Structure and Magnetic Properties of Sm2Co17 Alloy Films
Authors: Wang Can , Fang Qing Qing , Wang Dang Dang , Yang Jin Jin , Li Jin Guang
Published: June 2014

Sm2Co17:Cu,Crfilms growing on Cr buffer layer and Cu seed layer were prepared by pulsed laser deposition(PLD) methodbased on Si(100) substrate. The results showed that Cu and Cr co-doped in SmCo films made the refinement of crystal grain and the increase of coercivity of SmCo. Beside, the experiments found that the incorporation of Cu and Cr in SmCo films resulted in a positive effect of the exchange bias for SmCo-CuCr system. We suggested that the mechanism of the exchange bias origins from the interaction of ferromagnetic-antiferromagnetic state (FM-AFM, SmCo-CuCr). Meanwhile, the magnetic measurment of added magnetic field and zero-field-cooled (FC-ZFC) at temperature range of 10K~300K has further confirmed the critical value of FM-AFM tansform is about 80K, which is suggested that it was attributed to the coupling competition of FM phase and AFM phase.
The Performance of Gold Nanoparticles Supported on Mesoporous Zirconia for the Synthesis of Azoxybenzene
Authors: Jia Mei Lin , Feng Meng Jie , Li Xu , Bao Zhao Ri Ge Tu
Published: June 2014

Gold nanoparticles supported on mesoporous ZrO2 were prepared and their performance for the selective reductions of nitrobenzene to azoxybenzene was investigated. It was found that azoxybenzene could be successfully synthesized over these catalysts. Furthermore, the catalytic activity of catalysts is dependent on the pore size of catalyst. The catalyst Au/ZrO2-PEG-1000 with pore size of 2.2 showed higher activity than Au/ZrO2-PEG-600 with pore size of 1.9nm.
Hydrothermal Synthesis and Characterization of Cerium-Based Oxides
Authors: Dangerfield Randi , Sharp Shannon , Wang Rui Gang
Published: June 2014

We report a facile hydrothermal synthesis in base solution for shape/size-controlled ceria (CeO2) nanocrystals and CeO2-ZrO2 solid solution. CeO2 nanocrystals in the shape of nanorods, nanotubes, or nanocubes with reactive {110} and {200} faces can be produced using this hydrothermal method. We found that hydrothermal reaction temperature is a critical parameter to control the shape and size of ceria nanocrystals. Above 210 °C, high resolution transmission electron microscopy studies revealed that the CeO2 nanocubes expose predominant {200} crystal planes. Microscopic investigation showed that the CeO2-ZrO2 solid solutions synthesized using this method had high crystallinity, and compositional homogeneity, and improved low-temperature reducibility.
Enhancement of Titania Photocatalytic Properties by Fabrication of MWCNT-TiO2 Nanocomposites
Authors: Soroodan Miandoab Ehsan , Fatemi Sh.
Published: June 2014

Multi-walled carbon nanotube and nanoTiO2 composite,(MWCNT)-TiO2,was synthesized via sol-gel deposition method. The product was characterized with FE-SEM and XRD analysis and the results were compared with nanotube TiO2 prepared by thermal treatment of the produced nanocomposite. Photocatalytic degradation of acetaldehyde, under UV and visible light irradiation, was performed in a continuos flow reactor equiped with 80W Hg lamp and the results were compared with commercial TiO2 powder (P25). Results showed considerable decrease in concentration of acetaldehyde fed into the reactor during a short time (70 min) for hybrid materials in comparison to nanotube TiO2. Furthemore, under visible light irradiation nanocomposite materials revealed good improvement in photocatalytic efficiency with respect to P25 powder.
Effect of SnO2 Particle Size on Properties of Ag-SnO2 Electrical Contact Materials Prepared by the Reductive Precipitation Method
Authors: Lin Zhi Jie , Sun Xu Dong , Liu Shao Hong , Chen Jia Lin , Xie Ming , Li Ji Guang , Li Xiao Dong , Huo Di , Zhang Mu , Zhu Qi
Published: June 2014

Performances of Ag-SnO2 electrical contact materials can be strongly affected by the microstructure. In this work, Ag-SnO2 composite powders were synthesized by chemical reductive precipitation method. During the precipitation process, Ag particle was deposited onto the surface of SnO2 particle with the assistance of citric acid. The microstructure and properties were analyzed for the prepared Ag-SnO2 electrical contact materials. Our research reveals that the particle size of SnO2 has significant influence on the morphology of the Ag-SnO2 composite powders, and therefore on the microstructure and physical properties of the electrical contact materials. With the decrease of particle size of SnO2, hardness of the Ag-SnO2 electrical contact materials increases, while electrical conductivity decreases.
Phase Field Crystal Study for the Effect of Heating Rate on the Premelting of Grain Boundary
Authors: Lu Yan Li , Hu Ting Ting , Mu Hong
Published: June 2014

The effect of heating rates on the premelting of grain boundary (GB) is investigated by the phase field crystal method. The microstructure evolution of premelting under different heating rates are discussed, and the film width of GB is quantitatively calculated in terms of the excess mass method. Results show that the liquid film appears as the melting point () is approached from below and that the film thickness is affected by heating rate. In heating process, at the same temperature (close to), the liquid film width is larger when the temperature increases with lower rate. In insulation process, the liquid film thickness increase until to its equilibrium value with holding time prolonging. For low-angle GBs, the higher heating rate the system has during heating stage, the lager equilibrium value of liquid film will be reached during insulation stage. For high-angle GBs, the liquid film thickness has the same equilibrium value during the insulation process although the heating rate is different during heating process.
Cooperative Energy Transfer of Er-Gd-Tb System in Tb3+, Er3+ Co-Doped K2GdZr(PO4)3 as a Potential Visible Quantum Cutting Phosphor
Authors: Niu Liang Feng , Liang Wei , Wu Chang Zeng , Wang Yu Hua
Published: June 2014

Tb3+, Er3+ co-doped K2GdZr (PO4)3 samples were prepared by solid-state reaction method and their photoluminescence (PL) properties were investigated in ultra-violet (UV) and vacuum ultra-violet (VUV) region. The results indicate that the energy transfers from Er3+ to Gd3+ and from Gd3+ to Tb3+ required for occurring of visible quantum cutting through down-conversion are efficient. In this cooperative energy transfer process, Gd3+ is used as an intermediate of energy transfer between Er3+ and Tb3+. The optimal quantum efficiency (QE) of this co-doped system K2GdZr (PO4)3 : Er3+, Tb3+ phosphor reached to 110%, suggesting a potential visible quantum cutting phosphor in practical application.
The Effect of the Cu Source on Optical Properties of Cu-Doped ZnO Films
Authors: Chen Lung Chien , Zhang Xiu Yu , Lee Kuan Lin
Published: June 2014

Cu-doped ZnO (CZO) films have been widely discussed due to its potential applications in semiconductor devices, such as gas sensors or solar cells, but few articles were reported to show the effect on properties of CZO films by using different Cu sources. The article demonstrates that CZO films have been prepared by using different Cu source via a simple ultrasonic spray method, in which copper nitrate and copper acetate were used as copper sources. Optical properties of CZO films prepared by copper nitrate and copper acetate were investigated by transmittance and photoluminescence measurement. The X-ray diffraction analysis and field emission scanning electron microscopy were used to investigate the composition and the morphology of the films. The CZO films prepared by using copper acetate shows better optical properties by comprehensive analysis.
Protein Adsorption on Titanium Surface Functionalized with Bioactive Gelatin Methacrylate Hydrogel Coating
Authors: Tan Guo Xin , Tan Ying , Ning Cheng Yun , Zhang Lin , Zhou Lei , Wang Hang
Published: June 2014

Gelatin methacrylate (GelMA) hydrogel comprised of modified natural extracellular matrix (ECM) components, making it a potentially attractive material for surface modification. In this paper, we hypothesize that establishing a GelMA hydrogel coating on titanium surface will accelerate osseointegration. Titanium substrates were silanized with 3-Aminopropyltriethoxysilane (APTES), which was treated by alkali-heated treatment firstly. The GelMA hydrogel coating was constructed on the silanized titanium surface by in situ photopolymerization under UV illumination. Adsorption of bovine serum albumin (BSA) onto modifed titanium surfaces was investigated. The results showed that GelMA-coated titanium adsorbed greater amount of protein than other Ti surfaces. The differences in protein adsorption behavior could result in very different initial cellular behavior on GelMA-coated titanium implant surfaces.
Immobilized Recombinant Chitinase and its Inhibition Effect on Botrytis Cinerea
Authors: Zhang Na , Yan Rui Xiang , Guan Wen Qiang
Published: June 2014

To isolate recombinant chitinase quickly and boost its anti-fungi activities in vitro, functional magnetic nanometer carrier was used to immobilize recombinant chitinase from the crude enzyme solution and immobilized recombinant chitinase was applied to test whether it would inhibit the growth of gray mold from fruits. In this study, the carboxyl magnetic carrier was produced by solvent thermal reduction method and characterized by scanning electron microscope (SEM) and fourier transform infrared spectrometer (FTIR). Then, the carboxyl magnetic carrier activated by EDC/NHS was applied to immobilize recombinant chitinase and the immobilization efficiency was investigated by quantitative analysis. To obtain the highest immobilization efficiency, reaction conditions were optimized through combining different pH, temperature and reaction period. The results show that the surface of magnetic carrier was successfully carboxyl and the average diameter was 200nm. The immobilization efdiciency could reach the peak 64.43% after 7h reaction at the condition of pH 6 and 25°C. It also shows that immobilized recombinant chitinase can significantly inhibit the growth of gray mold isolated from table grape compared with the enzyme without immobilization with magnetic nanometer carrier.
Synthesis and Characterization of Three Hydrated Calcium Phosphates Used as Biocement Precursors
Authors: Franczak Priscila Ferraz , Camargo Nelson Heriberto Almeida , Levandowski Nelson , da Silva Daiara Floriano
Published: June 2014

Calcium phosphates biocements are biomaterials that present crystallographic and mineralogical characteristics similar to human skeletal structure. This has led to the development of new calcium phosphates biomaterials for biomedical applications, especially biomaterials for repairing defects and bone reconstruction. Calcium phosphates biocements are a promising alternative in biomedical applications, for they are easy to mold, they have good wettability, hydration and hardening capacity during its application in biological environment. This work aimed at the synthesis of hydrated calcium phosphates powder, precursor to late biocements development. Three calcium phosphates compositions were produced via CaCO3/phosphoric acid reactive method in the ratios Ca/P = 1,5; 1,6 e 1,67 molar. The presented results are associated to hydrated powder morphology and synthesis process control. Field Electronic Microscope helped with the morphological characterization of the powders, Fourier Transformed Infrared Spectroscopy (FTIR) gave support to the identification of H2O e PO43- grouping vibrational bands and x-ray diffractometry (XRD) served on crystallographic characterization of hydrated calcium phosphates. The work showed that for the different powder compositions the hydrated calcium phosphate phase is formed by clustered fine particles. This demonstrated that the chosen synthesis method permits the obtaining nanoparticles of hydrated calcium phosphates, precursors for later biocement production.
Preparation and Release Profiles of a Solid Oleoylchitosan Coated Poly(lactic-co-glycolic acid) Nanoparticles
Authors: Li Yan Yan , Liu Feng Song
Published: June 2014

A solid oleoylchitosan (OCS) coated Poly (lactic-co-glycolic acid) (PLGA) nanoparticles (OCS-coated PLGA NPs) were prepared using the emulsification–evaporation method. The nanoparticles in suspension (TEM) and solid state (SEM) were spherical and very regular and compact. The effects of OCS concentration, PLGA concentration, drug concentration, and release media on drug entrapment efficiency and in vitro drug release behavior were investigated for the release properties using rifampicin (RFP) as a model drug. Both the increase of PLGA concentration and the increase of OCS concentration could decrease the drug release rates. The RFP release rates decreased as the RFP concentration increased. The RFP release rate was sensitive to the pH of the release media.
The Effects of Immobilization Conditions and Materials on the Desulfurization Performance of Immobilized UP-3
Authors: Guo Ning , Hou Ying Fei , Gu Ya Ya , Li Chun Hu
Published: June 2014

Immobilization of the bacterium Agrobacterium tumefaciens UP-3, which was isolated from soil and sewage in the Shengli Oilfield, was studied in this paper. The suitable culture condition of growth cells was determined. The effects of immobilization conditions and materials on the desulfurization performance of immobilized cells were investigated. The results showed that the immobilized cells with mixture of sodium alginate (SA) and polyvinyl alcohol (PVA) as the immobilized carrier had good biodesulfurization characteristics; The optimum operation immobilization conditions are 4° C, the concentration of SA being 3% (w), the concentration of PVA and SA being 7% (w), and the ratio of carriers (ml) and cells (g) being 20. When DBT addition is 2.7 mM, the DBT degradation rate of immbobilized cells is above 60%.
Adsorption of Ni (II) from Aqueous Solution Based on Porous Magnetic/Chitosan Resin
Authors: Song Hai , Yu Xing Hai , Zhang Xiao Qin , Yan Gui Fang , Zhen Yuan Zhi
Published: June 2014

The purpose of this work is to prepare a low-cost biosorbent,Porous Magnetic/Chitosan Resin(MCR), and determine the ability of this biosorbent to removing Ni (II) ion from aqueous medium. Both kinetics and thermodynamic parameters of the adsorption process were also estimated. The thermodynamic parameters indicated an exothermic spontaneous process and the kinetics followed the second-order adsorption process.
Adsorption Studies of Methacrylic Acid-Styrene-Acrylic Polyethers Copolymer on Imidacloprid Particles
Authors: Hao Han , Feng Jian Guo , Fan Teng Fei , Liu Wen Jun , Wu Xue Min
Published: June 2014

The adsorption of methacrylic acid-styrene-acrylic polyethers (MAA-St-APEG) copolymer on the insecticide imidacloprid particles was studied to calculate the kinetic, isotherm and thermodynamic parameters. The kinetic data followed the pseudo-second order kinetic model, and the equilibrium data were well fitted by the Langmuir isotherm model with the maximum adsorption amount of 7.610 mg·g-1 at 298 K. The calculated thermodynamic parameters including ΔG, ΔH and ΔS, demonstrated that this adsorption was a spontaneous and exothermic process in nature. Therefore, MAA-St-APEG copolymer are eligible for the dispersion of imidacloprid particles in aqueous solution as a effective dispersant.
Silica Gel as an Adsorbent in the Removal of Cationic Blue X-Bl from Aqueous Solutions and its Regeneration by UV-Fenton Oxidation
Authors: Xiong Qiu Yuan
Published: June 2014

The removal of cationic Blue X-BL in aqueous solution by adsorption of silica gel was investigated. Effects of pH, initial concentration of dye solution and temperature on the adsorption of Cationic Blue X-BL onto silica gel were studied. When the initial concentration of the blue dye was 100 mg/dm3, silica gel is 0.6 g at pH 9.3 and at 303 K, adsorption reached equilibrium after 2 h with the final adsorption quantity 16.38 mg/g. Fenton reaction with UV light was applied in the regeneration operation of silica gel which can transmit most of the UV light. The concentration of Fe2+ and H2O2 was evaluated and when the concentration of Fe2+ and H2O2 were 0.05 mmol/dm3 and 0.132 mol/dm3, the first, second, third and forth regeneration efficiency were 84.68 %, 82.05 %, 65.26% and 50.73 %, respectively. In order to improve the regeneration capacity and silica gels reuse times, acid washing was introduced in the forth regeneration after Fenton reaction, which can enhance the regeneration efficiency to 92.19%.
Research on the Quicklime Treatment Dewatered Sludge Technology and Mechanical
Authors: Chen Jie Liang , Deng Zhen , Zhang Ran Ling , Zhu Peng Lai , Ding Wei Wei
Published: June 2014

The fundamentals of lime treatment for dewatered sludge and main factors which affect the treatment process are introduced in this study. According to the results, higher effective calcium oxide content in lime contributes to faster heating rate of the semi-dry system and better effects of semi-dry process. Sludge at the moisture content of 45%-55% after the semi-dry process can be well balled while that at the moisture content of 35% can easily get collapsed and has hard surface. Mechanical design parameters are determined by experiments. The optimum stirring time is 5-10mins when well stirred and the stirring rate should be slow. Heat preservation jacket is needed for the machine and the water vapor, which is produced by heating, should be exhausted in time.
Effect of Crosslinker Type on the Properties of Surface-Crosslinked Poly(sodium acrylate) Superabsorbents
Authors: Xiong Yun , Zhang Xu , Liu Ming Zhu
Published: June 2014

A series of poly (sodium acrylate) superabsorbents hydrogels were synthesized through aqueous solution using N,N-methylenebisacrylamide (NNMBA), pentaerythritol triacrylate (PETA), ethylene glycol dimethacrylate (EGDMA) and dimethyl diallyl ammonium chloride (DMDAAC) as crosslink agents separately to investigate the effect of crosslinker type on the properties of acrylic-based superabsorbents. Furthermore, the polymers were surface-crosslinked using trimethylolpropane triglycidyl ether to improve the properties of swollen hydrogel. The morphology of the samples was characterized by scanning electron microscope (SEM). The swelling behaviors in 0.9 wt% NaCl aqueous solution and synthetic urine were investigated, and the compressive strength, salt sensitivity and water retention ability were also investigated. The results showed that the superabsorbent crosslinked by PETA which was a three-functional agent had the most water absorbency under load and the highest compressive strength compared with others, while the superabsorbent crosslinked by DMDAAC which was a cationic crosslinker had the best salt resistance and the most water absorbency under atmospheric pressure.
Synthesis, Structure and Characterization of a Novel 3D Zinc Organophosphonate
Authors: Li Hui Duan
Published: June 2014

A novel zinc organophosphonate was synthesized under solvothermal conditions by using [piperazine-1,4-diyldi (methylene)] bis (phosphonic acid) as a organic ligand. Single-crystal X-ray diffraction analysis reveals that compound 1 crystallized in the triclinic space group P-1 (No. 2). Compound 1 formulated as Zn (O3PCH2NHC4H8NHCH2PO3)·H2O. Compound 1 featured a 3D open-framework. Notably, the structure of compound 1 featured one-dimensional channel in the [00 direction. Water molecules were located in these channels. Further characterizations of compound 1 have been performed, including X-ray powder diffraction, IR, ICP and CHN analyses.
Study on Analysis of Certain Artillery’s Planetary Transmission Design Based on ANSYS
Authors: Zhou Ren Bin , Liao Xue Bing , Yang Jie Min , Zhang Yong Feng
Published: June 2014

When designing certain artillery’s planetary transmission of fluid gearbox, it is hard to calculate by general design method, because the plant frame is abnormity three-dimensional entity, and the plants distortion affects the contact stress of joggled gear tooth. In this paper, by the APDL language programmer, the three-dimensional entity of certain artillery’s planetary transmission is established; the finite three-dimensional contact is analyzed by ANSYS; the plants distortion affects is discussed by the choice of the constant FTOLN and FKN, the influence is analyzed that the plant frame’s distortion to the stress of joggled gear wheels, as a result, the planet frame’s transmutation quantity is direct proportion with the gear wheel’s most joggled stress by ANSYS.
Failure Analysis and Troubleshooting for Certain Tracked Artillery Deviation
Authors: Yang Jie Min , Zhang Yong Feng , Zhou Ren Bin , Liu Chong Fa
Published: June 2014

If a certain type of tracked artillery to keep driving straight, it’s mobile devices must make the lef and the right speed equal to two tracks winding movement. But in the actual moving process, due to the poor working conditions,such as mud and water erosion, sand grinding, undulating slopes, etc, in the case of uneven wear on both sides of the track, tracked artillery in use for some time, and sometimes there will be automatic deviation phenomenon. For this failure phenomenon, the use of the vehicle and steering theory, from the track wear inconsistent, inconsistent tightness, old and new with inconsistencies and change on both sides of the road wheel locating inconsistencies four aspects of a certain type of tracked artillery deviation phenomenon analyzed, by analyzing the proposed treatment measures.
Research on Transmission Approach between Title Bar Information of Engineering Drawing and PDM
Authors: Yang Zhi Hong , Hai Zheng Ping
Published: June 2014

The transmission between title bar information of engineering drawing and PDM is a key factor to realize design of engineering drawing based on PDM platform. This paper primarily adopts Object ARX to conduct secondary development of AutoCAD so that the title bar and related information of engineering drawing in the PDM system can be transmitted between AutoCAD and PDM.
KeyWords:PDM; Title Bar Information; BOM; Information Transmission
Kinematic Performance Evaluation for Heavy Duty Industrial Robot
Authors: Li S.Q. , Zou Y.Y. , Li Y.J. , Li Yan Jie
Published: June 2014

Serial industrial robot has been widely used in assembly, welding, painting and other fields in which high kinematic performance is required. In this study, an non-contact approach for accuracy measuring is presented. Comparing with the traditional method based on spherical coordinate system, the approach presented in this study is based on the Cartesian coordinate system which has higher measuring accuracy. Furthermore, kinematic performance evaluation experiments for two types of industrial robot prototypes are proceeded. Experimental results testified that the accuracy of the target robot and proved the efficiency of the approach.
Innovative Design of Circular Loom Based on Integration of Axiomatic Design and Design Structure Matrix
Authors: Li Xiang , Zhao Bo Cheng , Li Xue Qing , Zhou Shen Hua , Tang Hai Yu , Sun Zhi Hong
Published: June 2014

A new kind of three-dimensional (3D) circular loom was advanced. With the help of the integration theory of the Axiomatic Design (AD) and Design Structure Matrix (DSM), the whole system of the 3D circular loom was well designed. It not only can weave nylon yarn and aramid yarn which have good wear-resistance property, but also can weave special fibers without serious damage such as carbon fibers which are fragile. And based on this, one case was used to present the theoretical derivation of compound design matrix AD and DSM. Some schemes of mechanical design were proposed to solve the current problems in the process of carbon fiber weaving.
Investigation of Solvent-Dependent Catalytic Behavior of a Hydrophobic Guest Artificial Glutathione Peroxidase
Authors: Yin Yan Zhen , Jiao Shu Fei , Gan Xiong , Shi Zhong Feng , Hu Xiao Xi , Wang Yun
Published: June 2014

The investigation of the catalytic behavior of a hydrophobic guest artificial glutathione peroxidase (GPx) (ADA-Te-ADA) was carried out employing H2O2 and 3-carboxyl-4-nitrobenzenethiolas (TNB) as substrates. The relation between the catalytic rate of ADA-Te-ADA and the property of solvent used in the determination of catalytic activity was revealed. Typically, the co-solvents including ethanol, DMSO, DMF and CH3CN were employed in the determination of catalytic rates. It indicated that ADA-Te-ADA exhibited the typical solvent-dependent catalytic behavior. Especially, the higher catalytic rate was observed when polar protic solvent (ethanol) was used compared with other co-solvents. It suggested that polar protic solvent was the appropriate co-solvent for the assay of catalytic activity of hydrophobic artificial GPx. Additionally, the strong polarity of polar aprotic solvent plays an important role in the enhancement of GPx catalytic activity. This study bodes well for the understanding of the catalytic behavior of hydrophobic guest artificial GPx.
Design and Analysis of a Climbing Mechanical Appliance
Authors: Li Chao , Hu Lan Xiong , Wang Chao Chao
Published: June 2014

Current climbing appliances are difficult to ensure the steady change from walking to climbing. Consequently, we come up with a climbing mechanical appliance, design it and analyze the appliance on rationality and feasibility. The appliance is lifted by rack and pinion mechanism. In order to ensure smooth and steady movement of the appliance, a counterweight balancing mechanism is designed to adjust the centroid according to actual situation. Through the movement principle analysis of transmission mechanism for the appliance, we build its 3D model by SolidWorks. A simulation analysis has also been provided to examine the feasibility of transmission mechanism under the help of ADAMS.
Analysis of a Micro-Displacement Amplification Mechanism Based on Piezoelectric Stack
Authors: Yang Lu , Chu Jin Xing , Deng Yu Shu , Xu Xin , Wei Kang
Published: June 2014

In this paper, a flexure hinge micro-displacement magnifying mechanism was designed, which was based on the principles of triangle amplification, and the amplifier was driven by piezoelectric stack. The displacement of piezoelectric stack was amplified by the flexure hinges micro-displacement magnifying mechanism. In order to test the static and dynamic carried on it. Not only the characteristics of good linearity, magnification, high positioning resolution and high frequency response achieved but also the design theory approved its correctness in the experiment.
Parameter Identification of Surface Roughness in Ultra-Precision Turning Processing Based on GA-RBF Neural Network
Authors: Chen Jie Lai
Published: June 2014

The modeling of surface roughness is the key factor to improve the quality of products and raise the efficiency of process equipment in ultra-precision turning process. In order to analyze the influence of each cutting parameters on surface roughness, the prediction model of surface roughness was constructed, and parameter identification of the prediction model was required. To meet the requirement, the curve fitting tool of MATLAB toolbox and radial basis function neural network optimized by genetic algorithm were respectively used as a case study to validate the feasibility and reliability of the method proposed in this paper. The parameter identification results were given, and the comparison of the parameter identification results shows that the parameter identification based on radial basis function neural network optimized by genetic algorithm has higher prediction accuracy than curve fitting tool of MATLAB toolbox.
Research on the Punching Method of Multi-Position Progressive Die with the Feature Unit as the Step
Authors: Ning Jian Hua , Wang Han Jun , Song Jian Li , Shi Zhong , Mao Jian Zhong
Published: June 2014

This paper analyzes the design method of multi-position progressive die which adopts the existing product length and longitudinal overlap as the step, and proposes the design method of multi-position progressive die which is targeted at feature and adopts the longitudinal length of feature that appears most frequently in the products as one step, in order to deal with all kinds of limitation and weakness of process arrangement in the complex products with medium size. It also briefly explains the controlling procedure of punch and the classification principles of feature. The proposed method shortens the total length of the die, saves the die materials, reduces the difficulty of manufacturing the die, manufacturing cost and production cycle, and improves the stability of feeding materials and manufacturing precision of the product.
Test Study on Slipping Performance of the Flexible Nodes of the Precast Concrete Exterior Wall Cladding Panel
Authors: Liu Ruo Nan , Zhang Kai Yin , Tao Meng Lan
Published: June 2014

To explore the performance of the flexible nodes between the precast concrete exterior wall cladding panel and the frame structure, a steel truss is used as an analogue of the frame structure to develop a test. In the test, one precast concrete exterior wall cladding panel was installed on the steel truss, and the connection nodes are designed to be able to slip vertically. Different horizontal forces were exerted on the steel truss to form certain drifts, and the deformation of panel and the slipping performance of the connection nodes were explored. It is found that precast concrete exterior wall cladding panel won’t deform under the influence of the drifts, while the connection nodes between the frame structure and the panel were found to slip. The results show that the design of slipping connection node has enough reliability.
Design of Internal Structure of Ammunition Storage and Transportation Shelter
Authors: Wang Wei , Xuan Zhao Long , Wang Shao Shan , Duan Zhi Qiang
Published: June 2014

For the sake of obtaining the ammunition storage and transportation shelter, that had the characteristic of rational structure, high reliability and convenient take put, it was needed to design internal structure . This paper analysed the placement of pill ,cartridge case and fuze, and designed 6 schemes of internal structure design, which was regarding the ××mm howitzer projectile as the object to study, based on the technology requirement and demand of the ammunition storage and transportation shelter ,and the ammunition characteristic. By comparing and analyzing, the strength of shelter scheme 1,4 was best. The scheme 4 was better than other schemes in reliability of fixed device and convenience of taking and putting ammunition. The scheme 4 had the characteristic of rational structure, high reliability and convenient use for force. The ammunition storage and transportation shelter applied the scheme 4
The Review of of Active Power Filter
Authors: Zhou Xue Song , Liu Wei , Ma You Jie
Published: June 2014

Harmonics of power system seriously affected the quality of electric power. Active Power Filter (APF) [ which overcomes the shortcomings of passive filter (PF) has become main technology to suppress harmonic. In this paper, development history, key technology, problems and trends of APF are mainly analyzed and reviewed. With development of key technology of APF, it will have a better application prospect.
The Thermal Analysis and Simulation of On-Chip Temperature Control Technology in the Micro-Gyroscope
Authors: Yang Bo , Xu Lu , Fu Wen Shu , Deng Yun Peng
Published: June 2014

The thermal analysis and simulation of on-chip temperature control technology in the micro-gyroscope is researched. According to the thermal dissipation mechanism, the thermal resistance model of on-chip temperature control technology is established. The equantions of the conduction thermal resistance and the radiation thermal resistance are deduced. According to the lumped parameter model, the transient thermal response of the proof mass is derived. Theoretical analysis indicates the temperatures of the micro-heater and the proof mass are respectively 136.79°C and 59.95°C in equilibrium conditions. The Ansys simulation model of on-chip temperature control gyroscope is constructed to optimize the transient thermal response and the temperature distribution in steady-state. The simulation results show that the maximum temperature of glass thin-film is about 137.2°C, the temperature of gyroscope structure is about 58.5°C and the temperature difference is within 1°C in the steady-state. In the transient response, the temperature of gyroscope structure can be stabilized in the 12.5s. The simulation results prove that the on-chip temperature technology of micro-gyroscope has an excellent temperature uniformity and rapid temperature response.
Effect of Surface Morphology and Microstructure on Powdering Resistance Performance of GA Coatings with Different Aluminum Contents
Authors: Yuan Xun Hua , Qi Chun Yu , Zhang Qi Fu
Published: June 2014

The surface morphology and microstructure of galvannealed steel sheet (GA) coatings prepared at different galvannealing parameters were analyzed by X-ray diffraction and SEM, and powdering amount of GA coating was investigated by the double-Olsen powdering tester. The results show that when the Al contents below 0.16 wt%, the Ra of GA coating surface was measured namely below 1.0 μm, and powdering amount of GA coating was below 30 mg/m2, it is within a reasonable value required by automotive makers. After that with the Al contents increased in zinc liquid the amount of powdering increased, this means that the powdering resistance performance of GA coating not only depended on the iron content in the coating, but depended on the roughness profiles of the surface coating. When the galvanizing coating with 0.22 wt% Al content and galvannealing at 500 °C, with the inhibition effect of Fe2Al5Znxinhibit layer, the thickness of δ1k-phase was different in the GA coating, which deteriorated the powdering resistance performance of GA coating.
Solar Array Mounting Effects on Flutter Characteristics of Solar-Powered UAV
Authors: Wang Wei , Zhou Zhou , Zhu Xiao Ping
Published: June 2014

Solar powered UAV has the characteristics of high aspect ratio, low structural surface density, high structural flexibility and low flutter speed. Different solar array mountings will affect the flutter characteristics of the structure. The mechanical properties of solar arrays packaged and unpackaged are measured in this paper and the solar powered UAV structural finite element model based on Patran/Nastran was also established in the paper. Two solar array mounting ways are researched: embedded solar arrays and patching solar arrays. To investigate the flutter characteristics under the two solar array mounting ways, the Doublet lattice method (DLM) aerodynamic model is used to model the unsteady aerodynamic loads. Finally, flutter speed of the structure was determined by using the P-K method and the analysis result indicate that patching solar arrays is more conductive to improve the flutter characteristics of the structure.
Attitude Control of Flying Wing UAV Based on Active Disturbance Rejection Control and Multi-Object Nonlinear Control Allocation
Authors: Tan Jian , Zhou Zhou , Zhu Xiao Ping , Wang Wei
Published: June 2014

For the attitude control of flying wing UAV, need to consider the problems of model parameters perturbation and external disturbances, and resolve the special problems of redundant control surfaces and nonlinear control efficiency. The control problem of attitude tracking is investigated based on active disturbance rejection control (ADRC) and multi-object nonlinear control allocation. ESO are designed to estimate and compensate for disturbance. It can improve both the robustness and control performance of the control system. Control allocation make full use of the redundant control effectors to realize the integrated tradeoff multi-object control allocation under varying flight conditions and missions.
The G′/G-Expansion Method for Solutions of Evolution Equations
Authors: Xiang Chun Huan , Liang Bo , Wang Hong Lei
Published: June 2014

The investigation about traveling wave solutions of nonlinear equations is an important and interesting subject because they play important role in understanding the nonlinear problems. By using the (G′/G)-expansion method proposed recently, we construct the travelling wave solutions involving parameters for the Hirota and Satsuma equations. The travelling wave solutions are expressed by the hyperbolic functions, the trigonometric functions and the rational functions. The numerical simulation figures are shown.
Telecommunications Experimental Platform Based on E-Bridge Learning Software
Authors: Zhang Xiao Feng , Wu Rang Zhong , Zhao Zi Kai
Published: June 2014

Practical training plays a significant role in engineering subjects. In communication engineering, most of universities provide communication test cabinets or simulation software for practical training. These can make students understand the basic principles of local modules, while cannot provide a whole view of communication systems. Our work constructs a practical training project of telecommunications experiential platform, consisting of hardware communication facilities and software operation systems, realizing multi-user operating practice. This telecommunications experiential platform can train more than 40 students simultaneously and has proved to be economic and efficient in practical teaching.
Wireless Sensor Network Localization Algorithm Based on Hop-Count and Distributed Learning
Authors: Zhang Ying , Wang Yi , Ye Ying Ze
Published: June 2014

The wireless sensor network localization algorithm in this paper combines hop-count information and distributed learning. The network is classified into many classes based on sensors’ location, and then the class that each sensor falls into is specified. There are a certain number of beacon nodes with position coordinate in network, and they use their own locations as training data in performing above classification. This positioning method merely uses the partial hop-count information between target sensor and reference node in specifying the class of each node. The final simulation experiment will analyze the excellent performance of this method under different system parameters.
Label's Verification Technology of Gateway Based on Trusted Label
Authors: Duan Yu , Wang Yu
Published: June 2014

Trusted Network is a new research direction of the Internet. On the basis of trusted LAN, this study puts forward a trusted label of the trusted terminal, which can solve the DDOS attack efficiently and control the abnormal flow easily in the trusted LAN. In addition, it proposes the label’s verification technology, so as to ensure the execution efficiency of some real-time business in the gateway. Above all, the trusted label and the verification technology make the LAN more controllable and safer.
Network Access Control Technology Based on Trusted Label
Authors: Wang Yu , Duan Yu
Published: June 2014

This research proposes network access control model based on the trusted label. The model combines the admission access control of network device and the transmission access control of data flow effective, and uses the trusted computing technology to ensure the credibility of the generated label, and adopts the access control based on the security domain to locate the granularity of access control to every packets, reduces the probability of successful attack to the network based on the information flow, thereby improving the security control of the network.
A Novel Modeling Method Based on Multi-Dimensional Taylor Network and its Application in Time Series Prediction
Authors: Lin Yi , Yan Hong Sen , Zhou Bo
Published: June 2014

A novel modeling method based on multi-dimensional Taylor network is proposed. The structure and the principle of the multi-dimensional Taylor network are introduced. Based on this, the method is applied in the nonlinear time series prediction based on multi-dimensional Taylor network. It provides a new method to predict the time series, which can describe the dynamic characteristics without prior knowledge and can realize the prediction of the nonlinear time series just with input-output data. An example of predicting the stress data of a large span bridge tower induced by strong typhoon is taken at last in this paper. Results indicate the validity and the better prediction accuracy of this method in nonlinear time series prediction.
Research and Implementation of Safety Verification of Polynomial Hybrid Systems Based on Symbolic-Numeric Method
Authors: Zhu Yi Jun
Published: June 2014

As a mathematical model for cyber-physical system, hybrid systems are dynamical systems that are governed by interacting discrete and continuous dynamics. In this paper, we present a symbolic-numeric hybrid method to generate inequality inductive invariants for safety verification of polynomial hybrid systems, and based on this method, we develop an automated verification tool HSProver.