bluuebunny/crossref_metadata_2025 huggingface dataset:
Study on the Treatment of Domestic Sewage with Water Quenched Slag Biological Aerated Filter
Authors: Yu Yan Zhen , Feng Yan , Cheng Lei
Published: August 2011

The blast furnace water quenched slag has characteristics such as porous and superficial roughness, so it can be modified and cranked out a filter media. The treatment efficiency of domestic sewage with water quenched slag biological aerated filter (BAF) was researched in this paper. And the removal rate of organic compound, ammonium, SS, and chroma was also investigated. The results showed that the quality indexes of the domestic sewage after treatment met the primary standard of the national integrated wastewater discharge standard (GB8978-1996). So the purpose of the waste harnessed by other waste is achieved. The applicative prospect of blast furnace water quenched slag on domestic sewage treatment is very broad.
GGBFS Activated by Tetra-Isopropyl Titanate
Authors: Zhu Chun Jiang , Ru Hong Qiang , Zhang Chen
Published: August 2011

In order to prepare high activated ground granulated blast furnace slag (GGBFS), tetra-isopropyl titanate was used to process GGBFS in this study. Internal standard method of infrared spectroscopy (FT-IR) was used to study the activation extent of GGBFS influenced by the concentration of tetra-isopropyl titanate, activation temperature and time. The FT-IR analyses showed that the extent of GGBFS coupling reaction was the highest, when the accelerating agent was 0.6%, the concentration of tetra-isopropyl titanate, activation temperature, activation time were 1%, 100°C and 30min, respectively. The GGBFS which is activated by tetra-isopropyl titanate remarkable improves the mechanical properties of artificial marble.
SiO2 Beads with Quantum Dots: Synthesis and Bioapplication
Authors: Yang Ping , Murase Norio , Zhang Ai Yu , Cao Yong Qiang , Zhu Yuan Na , Shi Rui Xia
Published: August 2011

Aqueous CdTe and organic CdSe/ZnS quantum dots (QDs) were encapsulated into SiO2beads using various controlled sol-gel processes. Ligand exchange is a key to adjust the QD number in each bead and get a high photoluminescence (PL). Namely, partial ligand exchange from thioglycolic acid to 3-mercaptopropyotrimethoxysilane (MPS) on the CdTe QDs enables retention of the initial PL efficiency of the QDs in water, while the simultaneous addition of a poor solvent (ethanol) resulted in regulated assembly of the QDs through condensation of hydrolyzed MPS. SiO2beads thus prepared had, for example, a diameter of 17 nm and contained 3 QDs each. The PL efficiency of these beads was 30%, while the initial PL efficiency was 38% in a colloidal solution. In addition, a method including surface silanization, phase transfer and self-assembly, and SiO2shell growth has been developed to incorporate multiple hydrophobic CdSe/ZnS QDs into SiO2beads where they are well suited for bio-application due to their high brightness, less-cytotoxic, and non-blinking nature. To investigate the potential use for labeling in bio-applications, SiO2beads with multiple QDs were conjugated with IgG using streptavidin-maleimide as linkers. This preparation method is an important step towards fabricating intensely emitting biocompatible SiO2beads impregnated with semiconductor QDs.
Electrochemical Properties of PANI/CNTs Composites Modified by Oxygen Plasma
Authors: Li Chen , Zhang Li , Wang Kai
Published: August 2011

The PANI-CNTs composite material was synthesized through emulsion polymerization, and then the composite had been modified by the oxygen plasma to get the electrode material for super-capacitor. The influences of the modification time on the electrode material surface property and the electrochemical performance were investigated. And based on the analysis of the scanning electron microscope(SEM) and fourier transform-infrared spectroscopy (FT-IR), the results revealed that the particle size of the composite material become smaller, more micro pores were etched by the oxygen plasma and some active functional groups were introduced. The electrochemical tests demonstrated that the PANI/CNTs composite material modified by the oxygen material after 10 min has perfect capacitive properties, the specific capacitance is 287.8 Fg-1, and the ESR is 0.320 Ω.
Preliminary Study on Asphalt Mortar Containing Shaped-Stabled Phase Change Material
Authors: Chen Mei Zhu , Xu Guang Ji , Wu Shao Peng , Lu Wan
Published: August 2011

The objective of this study is to investigate the preliminary feasibility on the utilization of shaped-stabled phase change materials (SSPCM) in asphalt concrete to control pavement high-temperature. A comparative study has been conducted on the properties of asphalt with and without SSPCM. The properties investigated include basic and rheological performance along with temperature-controlling effect of asphalt mortars. The results show that there exist stiffening and “temperature lag” effect for asphalt mortar containing SSPCM, which indicates that it may be promising to use SSPCM to reduce high-temperature of asphalt pavement.
Synthesis and Characterization of Water Based Acrylic Pressure Sensitive Adhesive of Surface Protection Tape
Authors: He Min , Zhang Qiu Yu , Guo Ji Ying
Published: August 2011

The water based acrylic pressure sensitive adhesive was synthesized by seeded pre-emulsion polymerization, the influence of the amount of seeded pre-emulsion, and tri-functional aziridine crosslinker on the properties of the adhesive were studied. It was found that with the increase of the amount of seeded pre-emulsion, latex particle size decreases, contrasted with the increase of the viscosity, surface tension and contact angle of the emulsion; The aging performance of the adhesive can be significantly improved with the increase of the content of the crosslinker; compared with high temperature, high humidity has a more worse negative effect on the aging performance of the adhesive.
Synthesis of Main-Chain Polyimides Containing Azoaryl and their Third-Order NLO Properties
Authors: Shi Jie Ping , Wei Li , Hu Hong Wen , He Ting Chao , Zhang Xiao Qiang , Wang Chang Shun , Lu Guo Yuan
Published: August 2011

A series of main-chain polyimides containing azo aryl with different substituted groups have been synthesized by a condensation of corresponding N,N-dichloroethylaminoaryl azo compounds with 4,4’-(hexafluoroisopropylidene) diphthalic bis-imide in an alkaline DMF solution, which have high thermal stability and good solubility in organic solvents. The third-order NLO measurements made with Z-scan technique at 532 nm indicate that the polyimides containing p-nitrophenylazo and nitrobenzothiazole azo group (P2 and P3) have larger third-order nonlinear absorption coefficient (ß) and the nonlinear refractive coefficient (n2).
Theoretical Studies on P-Type Conduction in (S,Cu) Co-Doped ZnO
Authors: Xiong Zhi Hua , Chen Lan Li , Zheng Chang Da
Published: August 2011

Based on the first-principles calculations with density functional theory, the formation energy and electronic structure of (S, Cu) co-doped ZnO has been investigated, where the doping cases including related defects for Cu mono-doped, S-Cu co-doped, and S-2Cu co-doped ZnO are studied. The calculated results show that the formation energy of S-2Cu complex is lower than that of S-Cu complex under the O-rich condition. From the electronic structure, S-2Cu complex forms a peak of impurity state at the top of valence band. It was further found that heavy doping of Cu, not only enhances the acceptor concentration, but also leads to shallower acceptor energy level. Therefore, we concluded that S-2Cu complex is suitable for yielding better p-type conductivity in ZnO. The results are in good agreement with the experiment results.
Electrocatalysis Property of DNA-Hydroxyapatite Modified Electrode on Chloramphenicol
Authors: Zhang Nuo , Zhao Yan Fang , Dai Yu Xue , Wu Dan , Du Bin , Wei Qin
Published: August 2011

An electroanalysis method of determining Chloramphenicol (CAP) based on the eletrocalysis property of DNA-hydroxyapatite modified electrode (dsDNA/HAp/GCE) was setted up. In KH2PO4-Na2HPO4 buffer solution with pH 6.0 cotaining 0.1 mol·L-1KCl, the peak current was proportional to the concentration of CAP in the range of 2.80 × 10-7to 3.60 × 10-6mol·L-1, with a detection limit of 1.35 × 10-7mol·L-1. The linear regress equation wasip(μA) = 5.865 + 0.4784 c(µmol·L-1), and the linear correlation coffcient was 0.9942. The method has been successfully applied to the quantitative analysis of CAP in real Chloramphenicol eye drops samples, which totally meet the demand of microanalysis. The relative standard deviation samples analysis results was 1ess than 3%.
Mechanical and Thermal Behaviors of the Acrylic Based Core-Shell Rubber Modified Poly(Lactic Acid)
Authors: Petchwattana Nawadon , Covavisaruch Sirijutaratana , Euapanthasate Nukul
Published: August 2011

Toughening of poly(lactic acid) (PLA) biopolymer by particles of acrylic based core-shell rubber (CSR) was conducted to observe the influences of the rubber contents on the properties of the modified PLA. A series of PLA specimens modified with the CSR by 0.1-10 wt% was prepared by twin screw extrusion and injection. Diminishing brittleness was reflected in the dramatic increment of both the impact strength by threefolds and the elongation at break by fifteenfolds when CSR was employed by 10 wt%. The toughening was also accompanied with a decrease in the tensile modulus and strength. At low loading, the added CSR by 0.5wt% also assisted crystallization of the PLA by slightly lowering the crystallization temperature, allowing decreased processing time and improving the degree of crystallinity of the generally difficult to crystallize PLA.
A Fast Method for Determining Physical Properties of Slags with Contact Angle
Authors: Lian Shuang Shii , Lin You Yu , Zhang Gu Ling , Lu Mu Rong
Published: August 2011

In order to have good dephosphorization, it is beneficial to know the proper physical properties, including the melting point and viscosity of slag with fixed lime activity for steel refining, slag foaming and reaction in steel making. A fast way to determine the melting point and viscosity of complex multi-component slags is needed to control the quality of steel. In this study, experimental slag of FetO-CaO-SiO2-MgO-MnO-Al2O3 is obtained with electro slag remelting technique. The liquidus temperature of slag is determined with a video-based contact angle meter recorded with a high-speed camera and verified with an isopleth phase diagram of slag constructed with thermodynamic software FACTSAGE. The viscosity of liquid slag can be estimated with the optical basicity and liquidus temperature obtained from the calculated isopleth phase diagram, then it was compared with the experimental value measured by the rotating torque viscometer. The results indicated that substantial error between the calculated temperature of isopleth phase diagram and the value determined with method of contact angle in high basicity slag. On the other hand, minor difference exists between calculated liquidus temperature and measured temperature in low basicity slag. The viscosity estimated from the optical basicity and liquidus temperature of isopleth phase diagram show the similar behavior. It has good correlation between the calculated value and experimental value in low basicity, however, deviations are found in the range of high basicity.
Influence of the Parameters on the Laser Deposited TiAl Layer
Authors: Zhang Yuan Bin , Huang Bai Ying , Li Huai Xue
Published: August 2011

TiAl based intermetallic compound claddings were produced on TA15 alloy surface by using laser depositing technology to melt Ti-46Al-2Cr metal powders. An interface layer between TA15 substrate and the TiAl claddings was formed. The influence of laser power, scanning speed and number of cladding layers on the interface layer and the hardness of TiAl claddings were investigated. Higher laser power and lower scanning speed made the interface layer thicker. Increasing the laser power and especially the scanning speed could improve the hardness of the TiAl claddings. When the second TiAl layer was deposited, there was no interface layer formed between the two TiAl layers, but the hardness of the first layer decreased and the second TiAl layer was softer than the first layer due to the rough microstructure.
Effect of Solution Treatment on Microstructures and Mechanical Properties of Centrifugal Casting Al-Cu Alloy
Authors: Li Jun , Sui Yan Wei , Liu Ai Hui , Zhao Xin , Sun Zhi
Published: August 2011

Al-Cu alloy castings are obtained in the vertical centrifugal field. The effects of solution treatment on the microstructures and mechanical properties of Al-Cu alloy casting were studied by OM, micro hardness tester and room temperature tension and compression test. The results show that, the strength, micro hardness and elongation percentage of Al-Cu alloy casting increase firstly and then decrease as the solution temperature increases, and the mechanical properties reach the maximum values as the solution temperature increases to 530°C. As solution time increasing, the mechanical properties of Al-Cu alloy casting increase firstly and then decrease. When the solution time is up to 6 hours, the mechanical properties reach maximum value.
Series of Al–P Master Alloy and Excellent Refining Performance on Hypereutectic A390 Alloys
Authors: Zuo Min , Liu Xiang Fa
Published: August 2011

Series of Al–P master alloys including binary Al–P and Al–Si/Zr–P master alloys containing pre-formed phosphides have been developed. Hypereutectic A390 alloys have shown fast refinement response to the addition of series of Al–P master alloys. After refined at 780°C for 30 min, the coarse primary Si can be refined obviously from 90 μm to less than 20 μm. In addition, the morphologies of primary Si are changed from coarse polygon to near-sphere shape, and the distribution is improved simultaneously.
Biomimetic Synthesis of Fluorapatite Coating
Authors: Wang Hong You , Sun Kang Ning , Shan Ting , Yang Xiu Qing , Zhao Yan , Liang Yan Jie
Published: August 2011

In the present study, a simple method of regenerating microstructure of human tooth under near-physiological conditions (pH 7.0, 37 °C, 1 atm) was developed. Commercial gelatin was used as matrix materials in this method, which nucleated the formation of fluorapatite (FA) nanocrystals and regulated the growth of nanocrystals. As a result, the resulting thin FA coatings had been prepared on human tooth slices and sintered hydroxyapatite disks, which were in tight contact with the substrates. Besides, the morphologies of FA nanocrystals changed from acicular to hexagonal with the exchange cycle of gel increased. Electron dispersive spectrometer analysis indicated that some sodium and carbonate ions were incorporated into the FA crystal lattices and the calcium to phosphorus ratio was approximate 1.58. The mechanical properties of the resulting FA coating were investigated through nanoindentation system, which showed the similar hardness with dentin. In conclusion, this method demonstrated a potential application to repair tooth damage in dental clinics.
Thermal Shock Resistance of ZrO2 Fiber/Al2O3 Ceramics
Authors: Hou Xian Qin , Liu Jian Ye , Ge He Yi
Published: August 2011

The physical and mechanical properties of alumina (Al2O3) ceramics by introduction of zirconia (ZrO2) fiber were studied. ZrO2/Al2O3ceramics at different sintering temperature was investigated by porosity and water absorption measurements, flexual strength and thermal shock resistance analysis. Results showed that Al2O3 ceramics containing 15 wt% ZrO2fiber with sintering temperature of 1650°C exhibited good mechanical properties and thermal shock resistance. The porosity and water absorption were 7.4% and 0.69%, respectively. The flexual strength was 613 MPa and the thermal shock times reached 29 times. Scanning electron microscope (SEM) was used to analyze the microstructure of Al2O3 ceramics.
Study on Mechanical and Electromagnetic Shielding Properties of Carbon Fibers/Butyl Rubber Composite Films
Authors: Yan Ri Cheng , Zhu Zheng Hou , Song Hui , Xu Xue Jiao , Li Xiao Min
Published: August 2011

The carbon fibers / rubber composite films were fabricated by compression molding method with butyl rubber (IIR) as matrix and carbon fiber as reinforced material. The mechanical properties and electromagnetic shielding effect of the thin films at different conditions were measured by the WDW electronic universal testing machine according the national standard GB13022-91 and the far-field EMC shielding effectiveness test fixture (DN1015 type) respectively. The results show that the good mechanical properties of composite films with mess ratio of IIR and carbon black of 1:6 and vulcanizing time of 1.5h were obtained at the same other condition that the tensile strength reached 534.65MPa, the elongation rate reached 87.26% and the yield point stress up to124.85MPa. Meanwhile, it is also found that the electromagnetic shielding effect of the thin films shows negative growth at low frequency area ranging from 1MHz to 300MHz. Whereas, the shielding effect increases with frequency at 300MHz ~ 1.5GHz, and the SE value is up to -25dB ~-35dB.
Study on Epoxy Based Magnetorheological Elastomers
Authors: Wang Xiang , Ge He Yi , Liu Hua Shi
Published: August 2011

To improve the mechanical properties and the MR effect of MRE, we use flexible epoxy as the matrix of MRE. It shows that both the mechanical properties and the MR effect of epoxy based MRE improved. At room temperature the highest absolute modulus increase was 203 MPa when the intensity of magnetic field was 0.2T while the carbonyl iron content was 71.4%. Temperature influenced the MR effect. When at -40°C the maximum storage modulus increased more than 2356 MPa and changed with the temperature. Meanwhile, the morphology of the epoxy based MRE was studied by scanning electron microscopy (SEM).
Absorbing Properties of Fe-Based Amorphous Powder/S-Glass Fiber Reinforced Epoxy Composite Panels with Gradient Layer Structure
Authors: Li Xiao Min , Zhu Zheng Hou , Song Hui , Liu Zhi Bin , Xu Xue Jiao
Published: August 2011

In this work, the Fe-based amorphous powder/S-glass fiber reinforced epoxy composite panels of different amorphous powder and gradient layer structure were prepared by mould pressing method. The waveguide method and arch form method can be used to measure the electromagnetic parameters and the reflectivity of the samples respectively in the frequency range from 2GHz to 18GHz. The results showed that the amorphous powders distributed evenly during the S-glass fiber reinforced epoxy layers and the main absorbing mechanism of composite panels is magnetic loss. The absorbing properties of samples improve with the increase of the Fe-based amorphous powder contents and the thickness of panels. The model of gradient layer structure has a significantly effect to improve the impedance matching between the samples and the air. Thus, the absorbing properties of the composite panels can be increased effectively. When the thickness of the gradient layer structure composite panels is designed at 4.8mm excepting the Al plate thickness with 0.6~1.3mm thickness of Fe-based amorphous powder/S-glass fiber reinforced epoxy, the absolute value of the reflection coefficient of the multi-composite panels is above 4dB in the frequency ranged from 2GHz to 8GHz and above 10dB during 8GHz ~18GHz.
Influence and Mechanism of Polymer Coating on Shrinkage of Cement-Based Materials
Authors: Shi Liang , Liu Jian Zhong , Liu Jia Ping
Published: August 2011

The influence of polymer coating on the shrinkage of cement-based materials is comparatively analyzed in this paper. First of all, the relationship between cement-based materials shrinkage and water loss is discussed. Furthermore, some surface topography differences and pore structure changes of cement-based materials causing by polymer coating are investigated. At last, the affecting mechanism of polymer coating on reducing cement-based materials shrinkage is investigated. The results show that polymer coating can significantly reduce the shrinkage of cement-based materials. A more thick coating gets a higher shrinkage reducing ratio. There is a close relationship between cement-based materials water loss ratio and shrinkage ratio. Polymer coating can make the micro-crack on cement-based materials surface disappear. The cement-based materials coated with polymer have a lower surface layer cumulative average porosity than blank control group. The evaporation of capillary water and the development of negative capillary pressure in cement-based materials are controlled by polymer coating, thus the shrinkage becomes small.
Spectrophotometric Determination of the Ca Ion Content in Steel Slag by Using Chlorophosphonazo as the Spectral Chromogenic Reagent
Authors: Zhao Hua Lei , Cheng Xin , Chang Jun
Published: August 2011

Steel slag was carbonated and the Ca2+ in steel slag was also dissolving under different carbonation time and dissolution condition. As the spectral chromogenic reagent, chlorophosphonazo was used to analyze the leaching law of Ca2+ in steel slag. The results showed that, Ca2+ concentration in uncarbonated steel slag could rise from 240.79 μg/ml to 802.83 μg/ml in 120 min and Ca2+ concentration varied slowly after 120 min; The f-CaO in uncarbonated steel slag was 2.67%, but reduced from 2.67% to 0.88% after carbonating 3 min and reduced from 0.88% to 0.58% after carbonating 180 min; Ca2+ leaching concentration reduced from 102.31 μg/ml to 44.97 μg/ml after carbonating 180 time; Under the same leaching time(t=90min), the smaller the particle size, the more the leaching concentration of Ca2+ in steel slag.
Laboratory Comparison of Retroreflection Measurement System
Authors: Li Wei , Zhu Chuan Zheng , Yang Yong
Published: August 2011

As the wide application of retroreflective materials, following problems such as safety warning effect, quality, manufacturing technology, test method become more and more important. Many national test centers or big manufactures build retroreflection measurement systems. In order to identify these laboratories’ ability, we organize this laboratory comparison. After 6 months experiments, this comparison successfully finishes. And all the test data are dealt with statistical analysis.
A Meshless Level Set Method for Shape and Topology Optimization
Authors: Wang Yu , Luo Zhen
Published: August 2011

This paper proposes a meshless Galerkin level set method for structural shape and topology optimization of continua. To taking advantage of the implicit free boundary representation scheme, structural design boundary is represented through the introduction of a scalar level set function as its zero level set, to flexibly handle complex shape fidelity and topology changes by maintaining concise and smooth interface. Compactly supported radial basis functions (CSRBFs) are used to parameterize the level set function and also to construct the shape functions for mesh free function approximation. The meshless Galerkin global weak formulation is employed to implement the discretization of the state equations. This provides a pathway to simplify two numerical procedures involved in most conventional level set methods in propagating the discrete level set functions and in approximating the discrete equations, by unifying the two different stages at two sets of grids just in terms of one set of scattered nodes. The proposed level set method has the capability of describing the implicit moving boundaries without remeshing for discontinuities. The motion of the free boundary is just a question of advancing the discrete level set function by finding the design variables of the size optimization in time. One benchmark example is used to demonstrate the effectiveness of the proposed method. The numerical results showcase that this method has the ability to simplify numerical procedures and to avoid numerical difficulties happened in most conventional level set methods. It is straightforward to apply the present method to more advanced shape and topology optimization problems.
Optimization of Molding Process Parameters for Steel Ball Billet
Authors: Fu Cai An , Ye Jun Jian
Published: August 2011

Such evaluation standards as plumpness, roundness, force of cold upsetting, and the volume are made through the research on cold upsetting steel ball. Through a designed orthogonal test and the DEFORM simulation analysis, the process of ball billet is explained reasonably after primary selection and screening. Thus through comparison, it is seen that the original process is improved to a large degree.
Research on Mechanism of Steel Ball Grinding
Authors: Fu Cai An , Peng Guang Pan
Published: August 2011

Accord to the research on microcosmic mechanism of steel ball grinding, analyze the law of abrasive’s movement on the surface of steel ball, and then establish the elimination process and grinding effect by the analyzes software such as CATIA, establish a general model about how to remove the excess material on steel ball surface, and find the relationship between the influencing factors. With the help of the research above, we can provide a foundation of detailed study and improvement about various processes of grinding ball.
The Study of Damping Plate System in Steel Ball Processing
Authors: Fu Cai An , Ji Kun
Published: August 2011

in order to improve the efficiency and accuracy of steel ball processing, analyze the main influential factors, to propose the new technology and equipments of damping plate system and obtain the new solutions of the efficiency and accuracy of steel ball processing.
Study on Improved Multidiscipline Feasible Strategy for Complicated Turbine Component Optimization
Authors: Wang Rong Qiao , Jia Zhi Gang , Fan Jiang , Hu Dian Yin , Shen Xiu Li , Chen Zhi Ying
Published: August 2011

A new improved multidiscipline feasible (MDF) strategy based on the updating approximate function constructed by Response Surface Method (RSM) is firstly pointed out and denoted as MDF-update-RSM which involves double cycles. Before the start of inner loop on MDF-update-RSM strategy, the approximate function is initialized by RSM on a set of sampling points which are generated from the Design of Experiment (DOE). With the process of outer loop, the coefficients and one high-order term of polynomial are updated and upgrade by the Least Square Regression. The ability of this new strategy promotes the efficiency and saves huge calculational cost incurred by the MDF strategy which always runs on the multidisciplinary analysis (MDA). The MDF-update-RSM is good procedure to ameliorate the accuracy that has been tested by the Rosenbrock function in this paper. Finally, the optimization strategy is employed on executing the low pressure turbine shrouded blade design and provides a true optimal result compared to the classical MDF strategy.
A New Combined Particle Swarm Optimization Algorithm Based Golden Section Strategy
Authors: Fan Hui
Published: August 2011

Based the defects of global optimal model falling into local optimum easily and local model with slow convergence speed during traditional PSO algorithm solving a complex high-dimensional and multi-peak function, a two sub-swarms particle optimization algorithm is proposed. All particles are divided into two equivalent parts. One part particles adopts global evolution model, while the other part uses local evolution model. If the global optimal fitness of the whole population stagnates for some iteration, a golden rule is introduced into local evolution model. This strategy can substitute the partial perfect particles of local evolution for the equivalent worse particles of global evolution model. So, some particles with advantage are joined into the whole population to make the algorithm keep active all the time. Compared with classic PSO and PSO-GL(A dynamic global and local combined particle swarm optimization algorithm, PSO-GL), the results show that the proposed PSO in this paper can get more effective performance over the other two algorithm in the simulation experiment for four benchmark testing function.
The Design of Ball Mill Control System Base on Two-Cell Immune Controller
Authors: Yuan Gui Li , Xue Yan Guang
Published: August 2011

Currently, Ball Mill is most used coal grinding equipment of pulverizing system of thermal power plant in China. Because of this system is multivariable, strong-coupling and serious time-delay, and it also has nonlinear, time-varying and distributed parameter characteristics. It is naturally difficult to be effective for such kind system to use PID regulation law and design multi-variable system by single-loop. So try more intelligent control for this kind system. Immune Control has fast response and robustness, especially; the Two-cell Immune Control has integration and memory characteristics, and improve the system to better control effect. It is particularly suitable for solving practical engineering application problems with robustness, adaptability and requirements of dynamic performance. So this paper use Two-cell Immune Control for the Ball Mill Control System, and make a large number of simulation experiments about rated parameter, non-rated parameter and adding disturbance situation, it has made a good dynamic and static performance under various conditions. These results confirm the validity of the design of Ball Mill Control System base on Two-cell Immune Controller.
Simulation Analysis of Thermal Behavior of a Motorized Spindle
Authors: Wang Bao Ming , Mei Xue Song , Wu Zai Xin , Hu Chi Bing
Published: August 2011

MOST bus protocol is a high speed multimedia transmission protocol which applies to the in-vehicle entertainment system to solve wiring difficulty, EMI and so on. However, with the increasing number and complexity of the in-vehicle entertainment devices, the energy consumption of system grows continuously. In the paper, a kind of the centralized power management based on the MOST networks is designed. The PowerMaster function in the MOST Master node can control and change the status of every device node by monitoring the running situation of the whole MOST networks. At last, the experiment indicates that the PowerMaster can manage the power supply of the MOST networks effectively. Under the control of the PowerMaster, the system energy cost is lower than before.
Study on Tor- Distribution Strategy for Hybrid Electric Bus Based on Optimal Theory
Authors: Zhong Sheng Kuo , Zhao Zhi Guo , Sun Ze Chang
Published: August 2011

Abstract：The power system simulation model is established aimed at the hybrid electric bus. Optimal calculation model with restrictions is deducted at the target of minimizing equivalent fuel consumption. The optimal torque distribution of Chinese typical city cycle is solved with optimal theory. The simulation results reveal that the optimal control strategy can improve fuel economy and power system efficiency significantly.
Rear Add-on Device for Drag Reduction of Van Body Truck
Authors: Li Song , Zhang Ji Cheng , Ming Lei , Liu Xiao Lei , Jiang Li Yong
Published: August 2011

In this work, to reduce the drag of a van body truck, an aerodynamic device is fixing on the aft-body with different angle of declination and shape of the wing. The effects of reducing drag are studied by the methods of Numerical Simulation. And then the mechanism is discussed. The paper selects four rear add-on devices with different obliquity by 5deg, 10deg, 15deg and 20deg. And the shape of the wing is defined as straight line and curve, respectively. Seen from the results of numerical simulation, the rear add-on device can reduce the drag effectively. When the declination angle is 15deg, the effect is the best and the drag of the truck model is reduced by 8.9%. Furthermore, when the add-on plate is changed from contouring with straight line into Witozinsky curve in the same declination angle, the drag can reduce about another 3%. With the optimum declination angle and wing shape, the drag of the truck model is reduced 11.98%.
The Threshold Value Segmentation Approach of Images Based on Ant Colony Optimization
Authors: Yang Ming , Hu Zhan Shuang , Zhao Wei Ping
Published: August 2011

This paper briefly introduces the basic principle of threshold partition firstly, and researches an analyses the threshold partition of ant colony optimization based on otsu. The simulation results prove the rapidity and validity of the method which lays the foundation for multi-threshold value segmentation approach.
Invsetigation about Residual Stresses of Plasma-Spraying Sm2Zr2O7/YSZ Thermal Barrier Coatings of Different Substrate Conditions
Authors: Zhang Hong Song , Cai Gang Yi , Yang Shu Sen
Published: August 2011

Effect of substrate conditions, including material type, thickness and radius of substrate, on residual thermal stresses of plasma spraying Sm2Zr2O7/YSZ TBCs was analyzed through finite element method in this paper. The radial and shear stresses of the coating decrease with increasing of distance from the center to edge, and they decrease abruptly at the edge of the specimen, while the axial residal stress increase abruptly at the edge of substrate. All residual stresses increase with increasing of thermal expansion coefficient of substrate. The thickness of substrate has slight effect on the radial residual stress, axial residual stress and shear stress are almost uneffected by substrate thickness. The optimum thickness of substrate is 10mm. Radius of substrate have no effect on radial stress when it is greater than 28mm.
Application of Optimal Technique with Discrete Variables in Furnace Structure
Authors: Yuan Xiao Ming , Zhang Li Jie , Du Bing , Wang Qiu Zhong , Zeng Da Xing
Published: August 2011

Based on the characteristics of steel structure of the furnace, a generic finite element model, automatic loading, analysis and post-processing was achieved by ANSYS-APDL firstly. Then taking the sizes of profile as design variables and total mass as objective function, the size optimization design on steel structure was developed by means of two-level algorithm based on discrete variable.
Application of Honeycomb Structure in Machine Tool Table
Authors: Gao Dong Qiang , Zhang Fei , Mao Zhi Yun , Lin Huan , Yi Jiang Miao
Published: August 2011

The aluminum alloy honeycomb structure used in the structural design of high-speed machine tool table to reduce the worktable’s quality, so that the inertial force generated from fast-moving reduced too. The new worktable and the original one both carried out static analysis and modal analysis by ANSYS Workbench respectively. From the result’s comparison, we can know that the new structure worktable’s static and dynamic performance are both better than the original one. The machine tool table’s machining accuracy has been raised.
Topology Analyses and Position Solution Based on Asymmetric and Fewer DOF Parallel Robots
Authors: Liu Ping An , Shi Xiao Heng
Published: August 2011

By using the theory and method of topology structure design of parallel robotic mechanisms, the degrees of freedom (DOF) is analyzed based on 4-DOF(3T1R) asymmetric parallel robots in this paper. Then, the inverse and forward kinematics of the manipulator are calculated through establishment of constrained equations with analytical approach.
Study on Fault Diagnosis of Wind Turbine Main Bearing Based on Finite Element Analysis and Wavelet Analysis
Authors: Qu Yi , Chen Chang Zheng , Zhou Bo
Published: August 2011

A new method based on finite element analysis and wavelet analysis for the fault diagnosis of wind turbine main bearings is presented in the paper. Firstly, take example for low speed bearing, the three-dimension models of the good and fault bearings are set up, which was discussed with using finite element method. The stress, strain and contact stress distribution were computed by this method. Then the wavelet transform of data signals collected in experiment was carried out with db6 wavelet and 4 scales on the basis of the stress wave analysis. The frequency D3 and D4 signals were reconstructed and characteristic frequencies of stress waves with the simulative faults were extracted. It has been shown that the method applying finite element analysis and wavelet analysis is an efficient method for the fault diagnosis of wind turbine main bearings.
Cutters Plane Layout Design of the Full-Face Rock Tunnel Boring Machine (TBM) Based on Multi-Spiral Layout Pattern
Authors: Huo Jun Zhou , Zhao Hai Feng , Zhang Xu , Sun Wei , Zhao Yu
Published: August 2011

The multi-spiral layout pattern has been widely adopted in practice during the layout design of the cutters. Considering the engineering technical requirements and the corresponding structure design requirements of the cutter head, this study formulates a nonlinear multi-objective mathematical model with multiple constraints for the cutters plane layout design based on a multi-spiral layout pattern. And then a genetic algorithm is employed to solve a cutters’ multi-spiral layout problem. An instance of the cutters’ plane layout design was solved by the proposed methods using a multi-spiral layout pattern. Experimental results showed the effectiveness of the method of combining the mathematical model with the algorithms, and the pros and cons of the multi-spiral layout pattern.
Analysis of Combustion Characteristics and Influencing Factors of Space Dispersed Double-Wall-Jet Combustion System
Authors: Guo Peng Jiang , Gao Xi Yan , Tang Yun Bang
Published: August 2011

Based on the ideas of wall-guiding-spray and spatial dispersion, A new type of diesel engine double-wall-jet combustion system is designed. The effect of speed, load and injection condition on the double-wall-jet combustion system is researched by testing, on the double-wall-jet combustion system, the combustion modes for whole working condition is analyzed, the comparison of combustion and performance between the original machine with the new one is carried out. The results showed that: Instantaneous heat release rate of double-wall-jet combustion system shows a single peak. As the speed increases, the corresponding crank angle of ignition retards, the peak outbreak pressure increases and then decreases, the peak instantaneous heat release rate, the peak average temperature, the peak cylinder pressure rise ratio, and the cumulative heat release per unit mass of working gas is reduced. As the load increases, the corresponding crank angles of peak cylinder pressure and gravity center of heat release rate are postponed. With the load increasing, the ignition crank angle corresponds early at low speed, and the ignition point does not change significantly with the load at high speed. The effect of the injector hole diameter/number on the cylinder pressure and instantaneous heat release rate curve is not significant at high speed and large loads, but at low speed and large loads is significant. Cylinder pressure of 6-Φ21 injector is higher than 5-Φ25, the instantaneous heat release rate of 6-Φ21 injector has a trend of a single peak, the instantaneous heat release rate of 5-Φ25 injector has a trend of a double peak and the focus of the heat release rate postponed. With the advancing of injection timing, the ignition crank angle and combustion phase advances, the peak cylinder pressure increases. Injection pressure has little effect on the combustion characteristics. By comparison with the original machine, while maintaining the power performance of the same circumstances, the cylinder pressure and NOx emissions of double-wall-jet engine are reduced in degree, fuel consumption rate is not almost changed, and the same plane rather, smoke intensity is improved at low speed, smoke intensity at high speed smoke high-speed only deteriorates of 0.2-0.3 BSU.
Numerical Experiment on Bend Strength Computation of Profile-Shifted Involute Gear
Authors: Shi Huo Jie , Zhang Xiang
Published: August 2011

In order to fix on the inner connection of modification coefficient and bend strength, the static analysis of profile-shifted gear is made by applying Finite Element Method, then regression equation that revealed the relation between modification coefficient and bend strength is set up according to the Similarity Theory. Given bend stress of a standard gear, the bend stress of any profile-shifted gear with the same teeth can be calculated from the equation.
Frequency Splitting and Distance Boundary Condition in Magnetic Resonance Coupled Wireless Power Transfer System
Authors: Huang Xue Liang , Tan Lin Lin , Li Hui , Qiang Hao
Published: August 2011

In this paper, a magnetic resonance coupled wireless power transfer system(MRCWPTS) with series capacitor compensation is studied in order to investigate resonance frequency, and then the system transfer model is presented. Research results show that system resonance frequency is likely to occur splitting and maybe appear two or three resonance frequencies(odd /even mode resonance frequency and nature resonance frequency) in close distance under small load, which increases the system instable, and makes the system difficult to control in resonance frequency. By analyzing of the system, the distance boundary condition when resonance frequency splitting is given, under this boundary the system avoid resonance frequency splitting well, then simulation and experiment results verify the theoretical analysis.
Pipe Network Remote Monitoring and Fault Diagnosis System Design
Authors: Fu Ren Xuan , Du Yan
Published: August 2011

Based on existing pipe network monitoring system and start with the concept of The Internet of Things[1], the remote monitoring and fault diagnosis system is designed.It can make the fault diagnosis expert experiences shareable, raise user ability, reduce the system maintenance costs,and improve the management level as well.
Management Optimization and Control in Manufacturing Process Based on Knowledge-Flow
Authors: Li Gui Qin , Mitrouchev Peter , Lin Song , Lu Li Xin , Brissaud Daniel
Published: August 2011

Knowledge management plays an important role in the management and control of product quality. In order to improve the efficiency of knowledge utilization in the product processing and study the knowledge flow with consideration of knowledge providers, a new method based on social network analysis is proposed in this work. Considering the social background of the different knowledge providers, the center degree of each provider could be obtained. With this value of center degree, the position of different kinds of knowledge could be calculated as well. Meanwhile, the use of correlation analysis software could help to optimize the tactic of task. Thus, on the one hand, the using and the flow efficiency of the knowledge in the product processing can be optimized more comprehensively, and on the other hand the management and control process of the product quality could be greatly improved.
Application Study on Complex Product Based DMU in Product Life Cycle
Authors: Yang Yun Bing , Wang Feng Jun , Wei Li Fan , He Liang Li
Published: August 2011

The design characteristic and effect of DMU (Digital Mock-Up) are simply introduced. According as the design characteristic of complex product, the request for DMU platform in product life cycle is analyzed, and function analysis of DMU platform is finished. The whole frame and logic configuration are illuminated based function analysis, the realization method of design validation and optimization, design cooperation, maintenance support are emphatically analyzed, and some applied examples of DMU are displayed. The future imperative studies for DMU are discussed based the developed work and existent problem.
The Design of Encryption System Based on RC5 Arithmetic
Authors: Liang Song Feng , Dong Zhu Rong , Qiu Hao
Published: August 2011

This paper includes some conceptions of symmetrical cryptology such as ” Liner Feed Back Shift Register”(LFSR) and RC5 arithmetic. The paper also introduces the application of symmetrical cryptology in encryption system designing.
Self-Localization for Robot Based on the White Line
Authors: Lv Kun , Su Jin Wen , Chen Xi Ping
Published: August 2011

By numerical simulation computation, after passing the pulsating flow, enhanced heat transfer mechanism in spirally fluted tubes was researched. Numerical result shows that pulsating flow can cause the outlet pressure to fluctuate cyclical and the extent of fluctuation increases with the pulsating flow frequency. The pulse flowing can make the fluid generate the whirlpool nearby the spirally fluted tubes and the phenomenon of periodic production, drift, and fall-off appears. Because of the vortex, the fluid motion and relative motion are enhanced. The pulse flowing can improve the coordination level between velocity and temperature, thus has strengthened the heat transfer effect.
Vibration Isolation and Noise Reduction Design of the AH20 Motor’s Lifting up Structure
Authors: Li Lai Qiang , Wang Shu Lin , Xu Bo
Published: August 2011

Compared with sewing machine driven by traditional match motor, industry sewing machine driven by AH20 motor have economy energy, intelligent degree, install convenience, operation simple and ability completely etc. It has vast applied foreground and huge market potential. But the lifting up structure has problems of vibration and noises in use, and seriously obstructed the progress of its market expansion. The causes were found through theoretical calculation, modal analysis and experiment analysis, and the structure was improved. The experiment results confirmed the validity of the changes.
The Dynamic Compensating Research of the Fingertip Force Sensor
Authors: Chen Yu , Xu De Zhang
Published: August 2011

This paper discusses the subject that including the dynamic compensation of finger force sensor researching, the dynamic compensation based on the FLANN method and the dynamic compensator realization. This design mainly uses the operational amplifier to carry on dynamic compensation, its mathematical model is equivalent two step model to design dynamic compensator, which enhance the dynamic response characteristic of the fingertip sensor.
Effect of Mo Addition on Microstructures and Mechanical Properties of Ti2AlNb Alloy
Authors: Chen Yu Yong , Du Zhao Xin , Kong Fan Tao , Xiao Shu Long , Zhang Zhen Xing
Published: August 2011

Effects of different Mo contents on microstructures and properties of Ti-22.5Al-20Nb-2V(at.%) were analyzed in this paper. Experimental results showed that the grain size was refined and the amounts of equiaxed α2 phases decreased with increase of Mo from 0.6at.% to 1.5at.%. The size of (O+B2) lath was refined when Mo from 0.6at.% to 1.2at.%. However, it seems that Mo easily segregate especially in grain boundary and become seriously with Mo increased. Compression tests showed that the yield strength and ultimate strength of alloys were obviously improved with Mo addition from 0.6at.% to 1.2at.%. Microhardness tests showed the same trend with compression yield and ultimate strength.
Research on Thermal Effect and Mode Properties of a Q-Switched Laser by Using Shack-Hartmann Wavefront Sensor
Authors: Zhang Xiang
Published: August 2011

Results of an experimental and theoretical analysis of the proprerties of a LD pumped laser using a stable resonator and second harmonic conversion crystal are presented. The influence of thermal lens effect on laser output mode and beam quality has been discussed briefly by using the transfer matrix theory. In this paper, further experiment on the output beam quality of a LD pumped acousto-optic Q-switched laser has been also performed by adopting Shack-Hartmann wavefront sensor and Zernike mode reconstruction theory. Using this method, PV and RMS error of aberration wavefront, the first 35-order Zernike aberrations can be acquired. Furthermore, Strehl ratio curve of output beam and the distribution of circle energy can also be obtained by further calculation, so mode properities can be comprehensively understood. Experimental results show that the beam wavefront aberration is mainly concentrated in the first 15 orders of Zernike aberration, mainly including the defocus A3, the low-order astigmatism A4 and A5, the coma and spherical aberration because of the thermal-lens effect.