bluuebunny/crossref_metadata_2025 huggingface dataset:
Microstructure, Mechanical and Shielding Properties of Fe67.5Ni23.5B9 Coating / 321 Stainless Steel Laminated Composite by the Air-Plasma Spraying Procedure
Authors: Yang Wen Feng
Published: July 2011

To meet the requirements of integrative mechanical properties and shielding effectiveness of nuclear radiations shielding materials, the boron-rich shielding coating (Fe67.5Ni23.5B9, in wt. %) were produced onto 321 stainless steel substrate (SS) by the air-plasma spraying technology. This type of coating-SS laminated composite will be likely to be used as protection against neutrons and γ rays from radiation shielding systems. The microstructure was characterized by scanning electron microscope (SEM), energy-dispersive spectrometry (EDS) and X-rays diffraction (XRD). The mechanical properties of Fe67.5Ni23.5B9 coatings were investigated, including adhesion strength, tensile properties and residual stress. The shielding effectiveness of the coating-SS laminated composite, including the slowing down of fast-speed neutrons, absorption for 0.4ev below thermal neutrons and the attenuation against 60Co and 137Cs γ rays were investigated. The results show that the produced Fe67.5Ni23.5B9 coatings-SS laminated composite possess homogeneous microstructure, satisfactory integrative mechanical properties and shielding effectiveness which testify the possible application in radiation shielding systems.
A Study on Dynamics of 2-PRR Parallel Machine Tool Based on the Lagrange Equation
Authors: Yuan Suo Xian , Shen Dan Dan
Published: July 2011

Based on the Lagrange equation, a dynamic equation of 2-PRR parallel machine tool has been established and the relation among displacement,velocity and acceleration of moving platform was given. By modeling and simulating on the simulink of Matlab, forword dynamics are solved. This paper also provide a reference for dynamics analysis and optimization of less freedom machine tool
Microstructure and Corrosion Resistant Property Research of Super 304H and TP347H Heat-Resistant Steel Welding Joint
Authors: Wu Guang Feng , Zhang Xiao Bin , Wu Wei
Published: July 2011

Microstructure of Super 304H and TP347H austenitic heat resistance steel welding joint by handwork argon tungsten-arc welding and electro-chemical corrosion property of weld metal and two base materials were investigated by SEM and M273 constant potential rectifier. The results shows that microstructure of the weld metalwere austenitic matrix + δ ferrite; In 5% HCl Solution, corrosion resistant capabilities were super 304H base material＞ weld metal＞TP347H base material; in 9.8% H2SO4 Solution, corrosion resistant capabilities were Super 304H base material＞TP347H base material＞ weld metal; Super 304H and TP347H austenitic heat resistance steel welding joint has better corrosion resistant property in HCl solution than in H2SO4 solution; Inter-crystalline corrosion results were consistence to results electro-chemical corrosion experiment in 9.8% H2SO4 solution.
Effect of Rare Earth Nano-Oxides on Sintering and Crystallization of Fused Quartz Ceramic Materials
Authors: Chen Yue Jun , Wang Zhi Fa , Bu Jing Long , Yu Li Xue , Wang Rong Lin , Wang Rui Sheng
Published: July 2011

Fused quartz powder (size<0.04mm) was used as raw material, nano-Y2O3, nano-CeO2and nano-La2O3(size<0.08μm) were dividedly used as additives with dosage of 2% each. Fused quartz ceramic materials were sintered in reduction atmosphere at 1300°C, 1350°C and 1400°C for 1h. The effect of rare earth nano-oxides on sintering and crystallization of the fused quartz ceramic were researched by measurements of apparent porosity, bending strength and thermal expansion rate, and analyses of XRD and SEM. The results showed that additives nano-Y2O3, nano-CeO2and nano-La2O3had obvious effect of inhibiting crystallization of fused quartz, and the samples added nano-Y2O3and nano-La2O3were better. Sample added nano-Y2O3had least thermal expansion rate. Sample added nano-La2O3had higher bending strength, and it showed that nano-La2O3had better effect on sintering of fused quartz ceramic. It can be deduced that nano-La2O3plays the excellent role as the crystallization inhibitor of fused quartz materials.
Coherent Phonon in Single-Walled Carbon Nanotubes by Using a few-Cycle Pulse Laser
Authors: Nie Zhao Gang , Li Xin Zhong , Kobayashi Takayoshi
Published: July 2011

We studied coherent phonon dynamics in Co-Mo-catalyst grown single-walled carbon nanotubes by using sub-5-fs visible pulses. Vibrational wave-packets corresponding to radial breathing mode for four chiral systems, (6,4), (6,5), (7,5) and (8,3), can be separately observed and achieved exact chirality assignments without ambiguity in coherent phonon spectra. Coherent phonon generation of radial breathing modes is in-depth studied by analyzing the probe energy dependent amplitude profiles, which indicates that the real and imaginary parts of the third-order susceptibility can both contribute to the modulation of the probed difference absorbance.
Effects of Occupation of the Cages on Thermodynamic Stability of SI CO2 Clathrate Hydrate
Authors: Qi Ying Xia , Zhang Hua , Zhao Sheng Xi
Published: July 2011

Molecular dynamics simulations are carried out to investigate the effect of the occupation of the cages on the stability of sI CO2 hydrates. Three types of cage occupations are concerned. The TIP4P/EPM2/DUAN potential models are used for the water-water, CO2-CO2, water-CO2 intermolecular interactions. The simulation results show that the occupation of the large cage is preferable compared to the occupation of the small cage. It may be induced that the hydration number of sI CO2 hydrates is mostly to be 9.
Influence of Heat Treatment on the Structure and Performance of ATP and its Catalyzer
Authors: Lin Yue Bin , Li Chun Bo , Zhu Yu Fu , Liu Ai Hui
Published: July 2011

Taking Attapulgite Clay(ATP) as a carrier, TiO2/ATP precursor was prepared by acid sol-gel method, and then made its composite under different heat-treatment conditions. The structures, dimensions, compositions of the composite are characterized by X-Ray diffraction, transmission electron microscope, thermogravimetric-differential thermal analysis and spectroscopic analysis measurements, respectively. the results show that TiO2/ATP composite increase the crystal transition temperature of TiO2, rutile TiO2emerge in the composite until 800°C, ATP lost its layer constructure and collapse at 850°C.
A Theoretic Study on Cam-Clamping Device
Authors: Deng Yuan Chao
Published: July 2011

A theoretical study has been made on the cam-clamping device. In this article, we consider specifically the calculations of cam geometry, calculations of clamping force and clamping torque, conditions for self-locking, and conditions for contact strength. Machine fixtures are essential in the process of mechanical manufacturing. There are many different types of fixtures, such as manual jig, pneumatic clamps, hydraulic fixtures, electric fixtures, etc. There are also many ways of clamping, such as incline clamp, screw clamp, eccentric circle clamp, hinge clamp [1], among which the eccentric circle clamp finds wide applications, especially in fast-clamping devices. Although the circular eccentric fixture possesses the advantages of simple structure, convenient manufacturing, and low cost, it suffers the drawbacks of small clamping force, short clamping-surface travel distance, and unreliable self-locking mechanism. The cam-clamping device discussesed in this article involves replaceing the eccentric circle with a cam, as shown in Fig. 1. The cam profile curve can be designed according to any requirements. The advantages of this replacement are obvious, in addition to preserving the advantages of the circular eccentric fixture, the cam-clamping can be designed according to the actual needs of clamping paths and selection of the appropriate cam profile to improve the self-locking.
Effects of Computational Parameters on Solidification Structures Simulated with Phase-Field Method for a Ni-Cu Binary Alloy
Authors: Tang Jin Jun , Jiang Jian Zhong , Tang Chun Hua , Hou Li Qun , Fei Liang Jun
Published: July 2011

In this study W was found to have strong effects on solidification structure of the binary alloy. Based 0.5 W0、W0 and 1.5W0 base W0, three conditions with free energy base W equal to 0.5 W0, W0 and 1.5W0 respectively were computed. The results showed that the variation of energy base contributed a lot to the development of side branches of equiaxed dendrite structures, the lower W, the more developed side branches, the higher W, the more restrained side branches. Furthermore, the effects of boundary layer thickness δ on solidification structures were also studied. It is found that when the layer thickness δ is as small as Δx/0.94, computational errors occurred at the base of the dendrite and when the layer thickness δ is as big as Δx/0.54, some irreal phenomena, such as coarsened dendrite trunks and maladjusted side branches, could be caused. Further study on space step Δx showed that bigger space steps made higher computational errors. It is given that the relationships among phase-field perturbation, space step and solidification structure.
Determination of Ge Fraction and Carrier Concentration in Si1-XGex/Si by Capacitance-Voltage Method
Authors: Cheng Li Hong , Yu L. , Yu F. , Lu Z.Z. , Zhao Xiang Fu , Han Ping , Zhao H. , Xie Z.L. , Xiu X.Q. , Zhang R. , Zheng Y.D.
Published: July 2011

The Ge mole fraction (x) of Si1-xGexlayer was described by the C-V technique for Schottkey contact of single heterojunction Si1-xGex/Si, whose structure profile can be characterized by SEM image and EDS. Then the strained Si cap layer was grown on the Si1-xGex/Si, and C-V technique was used to determine the carrier concentration and structure of double heterojunction Si/Si1-xGex/Si. The change of the structure between Si1-xGex/Si and Si/ Si1-xGex/Si was also observed by this method.
Impact of Process Parameters on the Auto Claw-Pole Thixoforming Process
Authors: Dao Van Luu , Zhao Sheng Dun , Lin Wen Jie , Yuan Xiao Mei
Published: July 2011

Thixoforming of steel is a potential forming technology, which can realize near-net-shape forming process with good quality in one forming step. In this paper, thixoforming process was used to replace the conventional hot forging process to form the auto claw-pole. The finite element code Forge2008Ó was used to simulate the auto claw-pole thixoforming process. The impact of three main process parameters such as initial billet temperature, punch speed and die temperature on the forming process were investigated. The reasonable process parameters for the auto claw-pole thixoforming were obtained: initial billet temperature 1430~1440°C, punch speed 100~200mm/s and die temperature 300~400°C.
The Analysis of Tube Spinning Process Parameters on Workpiece Defects
Authors: Zhao Han Dong , Zhang Hua , Zhao Chong Yang
Published: July 2011

The metal forming software Simufact is used to simulate tube spinning process. Different process parametes are received as result of simulation analysis, such as the maximum stress, maximum temperature, the amount of uplift and aperture expansion, and the method has been proposed to eliminate the defects.
Synthesis and Character of Amphiphobic Calcium Carbonate Nanoparticles In Situ
Authors: Liu Chang Yu , Wang Shu Liang , Li Jian , Wang Cheng Yu
Published: July 2011

Amphiphobic vaterite with a size of about 50 nm, was prepared via crystallization of CaCO3with perfluorooctane surfapropyl betaine（DF-921）in methanol by mimicking the process of biomineralization. The products were analyzed by scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD) and contact angle analysis. The results indicate that the CaCO3powder samples had both hydrophobic and oleophobic properties. The DF-921 used in this research not only controlled the crystal type of the CaCO3particles but also changed the surface properties of the final products.
Design and Optimization of Technology and Structure Parameters for Sheet Metal Drawing by Orthogonal Experiment
Authors: Yang Li Jun , Qi Yan Mei , Dang Xi Nan
Published: July 2011

The deformability of sheet metal drawing is influenced by many technology and die structure parameters. By orthogonal experiment, the main four factors effected the deformability of sheet metal drawing have been studied in the two-stage drawing respectively. The results have shown the influencing order and optimum parameters of key factors were varied in different multi-stage sheet metal drawing. The influencing order of the four factors in the first drawing was the blank-holder force > dies radius>the lubricants>the punch-nose radius. The second drawing was dies radius>the lubricants>the punch-nose radius >blank-holder force. The optimum technology and structure parameters have been also determined by the experiments in the paper.
To Simulate the Flow Field of Jet Pumps of Plane Model by Using Monte Carlo Method
Authors: Li Tong Zhuo , Bi Peng Fei , Jiang Nan
Published: July 2011

First numeric computation of fluid field inside jet pump is conducted with continuity equation and momentum equation of steady fluid under right-angled two-dimension coordinates, and the random walk model is given. As for the method of integrating coupling pressure and momentum equation is adopted. The result is conforming to the flow of reality. Furthermore, the relation of random walk times and computing time and computing errors is analyzed in-depth. The relation of iterative times and computing errors is analyzed. It establishes a foundation for studying the flow field of jet pumps to use the Monte Carlo Method. At the meantime it develops a new field.
The Impact of LPG Storage Tank Steel Specimen Fracture Analysis of Welded Joints
Authors: Gu Wei , Wang Guo Ping , Wang Xiao Ping
Published: July 2011

Take series of impact tests on welded joints for steel 09MnNiDR of LPG tank manufacture. And take scanning electron microscopy on impact fracture specimens. The results for the LPG storage tanks at low temperature welding process of steel making and the structure of low temperature storage tank to provide data to support safety analysis.
Research on the Effect of Ultrasonic Impact Peening on the Fatigue Property of 7075-T651 Aluminum Alloy
Authors: Yang Qiu Lin , Wang Dong Po , Wu Shi Pin , Li Sen
Published: July 2011

The fatigue property of friction stir welded joints in Ai7075-T651 is crucial adjective in the modern aerospace industry. Treated by the UIP (Ultrasonic impact peening) process using the self-made device, the effects are studied in this paper, and the results show that: under the stress ratio R=0.5, the fatigue life of welded joints treated by ultrasonic peening is prolonged by 8~14 times. The strengthened layer caused by the plastic variation, surface hardening and uniformity of tissue, and transversal residual stress of base metal after UIP becomeing compressive residual stress of 100 Mpa in the surface, which are the main reasons that lead to the improvement of fatigue property.
A Study of Temper Bead Technique on A508 Steel Welds
Authors: Chung Wei Chih , Tsay Leu Wen , Chen Chun
Published: July 2011

The use of temper bead technique in an attempt to eliminate the conventional postweld heat treatment (PWHT) in welding of A508 steel with Alloy 52 filler metal was evaluated. A PWHT at 621°C for 24 h reduced hardness in the heat-affected zone (HAZ) of the conventional welds but led to forming a carbon-denuded zone near the weld interface. The temper bead welding process not only softened the hardness in the HAZ but also diminished the carbon-denuded zone of A508-Alloy 52 welds. Apparently, the temper bead technique provides a convenient and time- saving process for welding/repairing large structural components.
Study on the Application of Fringe Curling in Knitwear
Authors: Song Xiao Lei , Li Wei , Chen Jia Yi , Kai Dong
Published: July 2011

This research works for plain stitch of weft knitted stitch, mainly introduced the curling property of plain stitch and it’s influence factors were given. I will combine with plain stitch's structure characteristics and its unique fringe curling of style to design and produce suitable knitwear to satisfy the increasing needs of ourselves in the modern life. Drape, three dimentional cutting, also means stereo cutting, was taken to the research in order to design and make a middle and long tape skirt with black and gray, together with a white super short T-shirt, we can see the application of fringe culing in the collar, bottom margin, wristband and so on. In short, color in harmony, long and short matching brings to harmonious with nature.
Microstructure of CrN-Based Nano Composite Solid Lubrication Films
Authors: Zhang Ping , Di Yue Lan , Cai Zhi Hai , Zhen Yang
Published: July 2011

The complex plating-sulfurizing process which fitted magnetron sputtering together with low temperature ion sulfurizing, was utilized to prepare a new CrN-based nano composite solid lubrication films with different Mo content. The structure, surface morphology, composition, and valence states of CrMoN composite coatings are tested by XRD, EDS, SEM and XPS respectively. The SEM results showed that the roughness of CrN composite coating reduces with addition of Mo element. X-ray diffraction pattern indicated that the preferential growth orientation of the coatings is changed from CrN (111) to CrN (220) after the addition of Mo element, the diffraction peaks shift leftwards as Mo content increasing, and the majority of phases are Mo2N and CrN, besides which MoS2 and Cr2S3 were created.
Preparation and Study of Strong Magnetoelectric Coupling on Multiferroic BaTiO3/La0.7Sr0.3MnO3 Bilayer Heterostructure
Authors: Li Ting Xian , Zhang Ming , Hu Zhou , Li Kuo She , Yu Dun Bo , Yan Hui
Published: July 2011

The BaTiO3/La0.7Sr0.3MnO3((BTO/LSMO) bilayer films had been epitaxially grown on (001) oriented LaAlO3 (LAO) single crystal substrate by using pulsed laser deposition technique,. The measurements of electric and magnetic properties showed that the bilayer heterostructure possessed low dielectric constant (εr=263), high ferromagnetic curie temperature (Tc=317K), and natural ferromagnetic and ferroelectric properties. The magnetoelectric (ME) voltage coefficient for the bilayer heterostructures at room temperature was around 140 mV/cm.Oe, which is one magnitude order higher than others. The interface coupling parameter k between ferromagnetic and ferroelectric layers was 0.68.
Study on Technique of Induction Cladding Alloy Layer in Steel Tube Outer Wall and Property of Alloy Layer
Authors: Yu Fan , Liu Jing Wei , Ren Le Dong , Wang De Qiang
Published: July 2011

This project studied on technique of induction cladding alloy layer in steel tube outer wall and property of alloy layer, briefly introduced the principle of technique, technique assemble and outstanding character, and analyzed the microstructure of prepared cladding layer. Result showed that there existed a clear bright transition band between cladding layer and body, and the metallurgical bonding performed very well. The alloy cladding layer microstructure present as form of eutectic between austenite + carbide (some austenite dendritic crystal can be seen in some zone), this technique is applied for steel tube outer wall strengthening. Compared to the current technique, it could protect environment and had advantage of high combining strengthen, speed and low cost and with no interstice and slag inclusion.
Gray Cluster Analysis on Thermal-Moisture Comfort of Bamboo Fiber Socks
Authors: Zhang Wei , Liu Zhi
Published: July 2011

8 kinds of blended knitted socks with different materials of nylon filament, bamboo and cotton fibers are taken as research objectives with a view to investigating the thermal-moisture comfort of bamboo fiber socks. The sense of well-being, thermal conductivity, moisture regain, water vapor permeability, wicking height and air permeability of the socks are tested, and the thermal-moisture comfort of socks with different fiber contents are studied. By using the gray cluster analysis, the integrated evaluation of thermal-moisture comfort of the socks is conducted. The results shows that the socks containing bamboo fibers have better warm-retention and water vapor transmission properties, their thermal-moisture comfort are better than that of nylon filament and cotton fibers in summer.
Pb(II)-Imprinted Polymer Prepared by Graft Copolymerization of Acrylic Acid onto Cellulose
Authors: Lin Chun Xiang , Liu Ming Hua , Zhan Huai Yu
Published: July 2011

The Pb( )-imprinted polymers were synthesized through homogeneous graft copolymerization of cellulose with acrylic acid in an homogeneous medium using Pb( ) as template. The prepared copolymers were characterized by FTIR and SEM. The batch adsorption experiments were conducted to evaluate the adsorption capacity of the Pb( )-imprinted beads. The results demonstrated that the imprinted beads showed significantly higher imprinting efficiency than those only consisting of poly(acrylic acid) without Pb( )-imprinted, and the selectively adsorption capacity of Pb( ) on imprinted beads was higher than other competitive ions(Cu( ) or Ni( )). The imprinted beads also showed much better stability in rebinding of the imprinted ions after three adsorption-regeneration cycles.
Strength and Finite Element Analysis of the Boom System of Truck-Mounted Concrete Pump
Authors: Zhou Xin Xiang , Cui Yu , Ren Nan Nan , Tang Yan Ling , Guo Shu Jun , Tian Rong Liang
Published: July 2011

This paper takes the boom of truck-mounted concrete pump from a company as the study subject. After analyzing its working station, it can be found that the fourth boom is in the most dangerous working conditions when extending horizontally. Select this operating mode, carry on the stress analysis and three dimensional entity modeling with the project software Solid Works to it, then realize the boom's statics finite element analysis with Solid Works plug-in unit Cosmos Works.
Research Progress and Perspective of Reduction Removal of Phosphorus in Steel Slag
Authors: Zhang Yu Zhu , Tian Tie Lei , Xing Hong Wei , Li Jie , Sun Lei
Published: July 2011

To introduce the situation of removal phosphorus from steel slag at present, the existence of phosphorus in the steel slag was analyzed. The technical concept that steel slag was used as a sintering raw material in sintering process was proposed by the thermodynamic analysis on the base of adding ferrous manganese ore.The technology has reference value for making steel slag be the raw material of sintering and can control the content of phosphorus in the sintering to a certain extent.
ADAMS MATLAB Co-Simulation of Dynamics Parallel Manipulator
Authors: Wu Jian Xin , Qi Xiang Dong , Wang Yan , Wu Di
Published: July 2011

Electromechanical coupling dynamic of parallel manipulator is a multi-input, multi-output, non linearity, tight coupling, and complex electromechanical system, but now there isn’t have a mature model of Parallel manipulator dynamic and methods of Simulation calculation. In this following passage, aiming at 3PUU parallel manipulator, we establish dynamic model In ADAMS software; design the servo controller in MATLAB and setting to the control parameters. The co-simulation results computer simulation validate the rationality of modeling of electromechanical coupling dynamics and show the optimal control of the mechanism’s displacement and torque of the servomotor by controller.
Effect of White Noise and Dichotomous Noise in a Bistable System
Authors: Guo Feng , Cheng Xiao Feng , Yuan Xiao Dong , He Shao Bo
Published: July 2011

The stochastic resonance in a bistable system subject to asymmetric dichotomous noise and multiplicative and additive white noise is investigated. By using the properties of the dichotomous noise, under the adiabatic approximation condition, the expression of the signal-to-noise ratio (SNR) is obtained. It is found that the SNR is a non-monotonic function of the asymmetry of the dichotomous noise, and it varies non-monotonously with the intensities of the multiplicative and additive noise as well as with the system parameters. Moreover, the SNR depends on the correlation rate of the dichotomous noise.
Role of Time Delay and Noise Color in Bistable System with Dichotomous Noise
Authors: Cheng Xiao Feng , Guo Feng , Yuan Xiao Dong , He Shao Bo
Published: July 2011

The effect of time delay and noise color in a time-delayed bistable system subject to asymmetric dichotomous noise and colored noise as well as to square-wave signal is studied. Applying small delay-time approximation, under the adiabatic limit condition, we obtain the expression of the signal-to-noise ratio (SNR) of the system. By virtue of the SNR expression, we find that, the SNR varies non-monotonously with the delayed-time and the correlation of the colored noise. Moreover, the SNR exhibits SR behavior as a function of the strength of the colored noise
Research on Long-Span Old Bridge’s Dynamic Reliability under Vehicular Load
Authors: Meng Yang Jun , Zhou Xian Yan
Published: July 2011

From an analysis of random process with modal analysis method, formulas of related parameters for an analysis of structural dynamic reliability have been deduced first in the paper, accordingly, prepares “the PMDK dynamic reliability analysis program” by Fortran programming language. Next, Some parameters for vehicular load probability distribution model have been derived by a method of unconstrained planning, Combining with an observation data for vehicle distribution at a long-span old bridge, the author has obtained the model in this paper. Finally, author has calculated a dynamic reliability for the long-span old bridge under a specific vehiclar load by the program and studied a relationship between dynamic reliability and displacement as well as sectional position and influences of damping and elastic modulus on its dynamic rerliability. Meanwhile the author also has studied a relationship between dynamic reliability and time and influences of structural unilateral and bilateral reliability.At last all aboved conclusions have been confirmed by Monte Carlo method.
Study of Flotation Deinking Efficiency of Old Newspaper and Old Magazine
Authors: Li Rong Gang , Xie Xiao Feng , Zhao Chuan Shan
Published: July 2011

The effect of flotation parameters such as flotation consistency, temperature, flotation time, air to pulp ratio, velocity of pulp flow (turbulence level), and pH on old newspaper/old magazine deinking efficiency was studied by using a laboratory deinking cell developed by ourselves. The optimized flotation conditions were: flotation consistency 1.2%, 50°C, 6min, air to pulp ratio 50%, velocity of pulp flow 3.5m/s and pH 8.5. By using the optimized flotation conditions, the deinked pulp brightness could reach 59.15%ISO, 10.18%ISO higher than that of the control, the effective residual ink concentration was 234.65 mg/kg, which less heavily than 875.56 mg/kg of the control, theoretical deinking efficiency was up to 84.42%.
Method to Construct Elementary Dependent Function Based on Weights of Characteristics
Authors: Li Qiao Xing , Qiang Bao Hua
Published: July 2011

Extension theory is the theoretical foundation of artificial intelligence and widely used in many fields such as optimal estimation and predictive control, manufacturing and design science. Dependent function is the core of extension set. According to the fact that decision-makers have different preferences for characteristics of basic-element, we defined the weighted distance between the point and the field within the multi-dimensional space, and constructed the location value and the elementary dependent function that has one variable and some dimensions based on the finite nested field. Some properties are also discussed. The proposed functions allow extension theory with a broader scope.
Thermodynamic Study on Production of Fe-Si–Mn Alloy from Adjusted Converter Slag
Authors: Tian Zhen , Yu Qing Xian , Chen Min
Published: July 2011

The composition change of slag and alloy phases were investigated during the process of selective reduction by thermodynamic calculating the selective reduction of the slag components with different modified slag composition, addition of reducing agent and reduction temperature. The results showed that the process of the selective reduction will be promoted by raising the temperature and the ratio of modifier to slag. The solubility of SiO2 increased as temperature increased. Selecting the appropriate amount of modifier will promote the selective reduction. In the first stage, Fe was reduced from the slag, followed by the reduction of P, Mn and Si. Finally, Fe-Si-Mn metal was obtained as a result of the selective reduction.
Improving Design of Muffler Based on Three-Dimension Numerical Calculation of Fluid and Sound Field
Authors: Zhao Hai Jun , Chang Jia Dong , Zhao Hong Jie
Published: July 2011

Presence problem of exhaust muffler is anal sized, using three three-dimension numerical calculation of fluid and sound field improvement on original structure is performed, and improving results are certificated. It is shown that insert loss under every rotational speed all reach to the standard of 28dB（A）, and the noises of stationary end tube on the attention frequency band are all smaller than 5 dB（A） , and its pressure loss is decreased by about 32% than 7.6kPa of original structure muffler. So performance of the muffler is evidence increased, an important method is provided for decreasing whole vehicle noise, improving aerodynamic quality and reducing environmental pollution.
Safety Model Comprehensive Judgement Application for Dike Construction Risk Evaluation System Research
Authors: Wang Ya Jun , Zhang Wo Hua , Jin Wei Liang , Wu Chang Yu , Ren Da Chun
Published: July 2011

Inclusive of the consideration for Solid-Liquid double phase character of dike construction, fuzzy comprehensive judgement system model was set up on the basis of Analytic Hierarchy Process as well as Fuzzy Consistency Theorem. With normal membership of fuzzy function, dike construction safety comprehensive judgement was realized by the help of weighted theorem that had been fabricated in the foregoing contents. With indirect theorem of model discrimination, generalized multi-dimension weighted fuzzy discriminating model was set up on the basis of fuzzy comprehensive evaluation. Furthermore, dike section system safety model discrimination for representative dike section was realized and sensitivity analysis for model system was carried out.
Comparison of Dry-Film and Zinc-Phosphate Lubricant for Tube Cold Forming
Authors: Cheng Zhi Yan
Published: July 2011

Dry-film and zinc-phosphate (Zn-P) lubricants were compared for potential applications of dry-film lubricant in tube cold forming processes through the twist compression test. Test results showed that the coefficient of friction (m) had no significant difference between Zn-P soap lube and dry-film lube. The lube coating breakdown time is different between Zn-P soap and dry-film lube. A preliminary industrial trial with dry-film coated tube through the cold drawn over a mandrel showed that the tube surface quality is good and comparable with the Zn-P coated tubes.
Force Calculation of Shunqiao Trench-Buried Inverted Siphon Structure
Authors: Ji Dong Yu , Ma Wen Liang
Published: July 2011

This paper adopt universal finite element calculation software to carry out force analysis for Shunqiao trench-buried inverted siphon，computer is applied in analysis of trench-buried inverted siphon. Deducing variation law of the inverted siphon’s stress and displacement in construction process and operational process. The calculation results Further shown design scheme’s Rationality and safety. which provide reliable reference of design and construction for the trench-buried inverted siphon.
Research of System of High-Rise Building Steel Structure Construction Based on AHP-Fuzzy Comprehensive Evaluation
Authors: Huang Hui Rong , Guo Jia Yuan , Zhu Yi Jie , Zheng Jian Xiao
Published: July 2011

In order to make the reasonable cycle time, the AHP (Analytical Hierarchy Process)-fuzzy comprehensive evaluation was applied to analyze the factors of affecting cycle time and the model feasibility was verified through a projecting example. With the development of the construction market, the project bidding is further regulative and extensive. In order to obtain more benefits, reducing project costs becomes very important to enterprise, so the construction quota which meets their own scale must be drawn up. All kinds of factors that would affect the cost will be measured, analyzed and evaluated by the construction quota, and the main quota difference is the measurable consumption, so it is important to make the quota of per hour construction machinery, while cycle time is the one of the main factors of affecting machinery quota [1, 2].
Preparation and Electromagnetic Properties of Poly(o-Toluidine)-BaAl2Fe10O19 Composites
Authors: Chen Ke Yu , Sun Meng Xi , Li Liang Chao , Xu Feng , Xiao Qiu Shi
Published: July 2011

The poly(o-toluidine)/BaFe10Al2O19 (POT/BFA) composites were synthesized by in-situ polymerization of o-toluidine in the presence of BaFe10Al2O19 particles. The structure, composition and morphology and electromagnetic property of the obtained samples were characterized by means of modern testing techniques. The results indicated that BFA particles were coated effectively by POT polymer chain and some interactions between POT and BFA particles were existed in the composites. The conductivity and saturation magnetization of POT/BFA composites were smaller than those of pure polymers and pure BFA respectively. The POT/BFA composites had excellent magnetic loss (μ′′) and dielectric loss (ε′′) in the range of 1 MHz~3 GHz because of their intrinsic properties and synergistic effect between components. Hence, they could be recommended as candidates for electromagnetic wave absorption and shielding materials.
The Impact of Meshing Transmission of Arc Gear by Hobbing Method and Central Distance Error
Authors: Ren Zhong Yi
Published: July 2011

The tooth profile of arc gear is no longer arc after hob process, it’s a section of curve which is similar to the arc. Although there have been confirmed that this curve which is similar to the arc can make sure that the transmission ratio and meshing point of two gears will not change ,pressure angle at the meshing point will certainly change, and there is also no literature report how much this curve has impact on pressure angle. The impact of meshing transmission of arc gear by central distance error researched by current literature is based on arc tooth profile, this study is not suitable for the tooth profile processed by hob, and there is no literature report how much central distance error has impact on transmission ratio, pressure angle and mesh point of arc gear which processed by hob. In this article, the author has work out this problem by use tooth surface equation.
The Design of Calibration Software of Sensor Characteristics Based on LabVIEW
Authors: Pan Xue Tao , Zhang Mei Feng , Cai Jian Wen
Published: July 2011

For the lack of the traditional calibration methods of the sensor static and dynamic characteristic parameters, the software of parameter calibration was designed by using the graphical programming language, that is, LabVIEW. The USB-based data acquisition card controlled by software is used to obtain the output voltage of the sensors, displaying a characteristic curve in the real time, and the static parameters (sensitivity, linearity, etc.) and dynamic parameters (natural frequency, damping ratio, etc.) were calculated and analyzed automatically on-line by using mathematical tools such as the least square fitting, spline interpolation, etc.. Experimental results show that the software has a good interface, is easy to operate, the results are accurate and efficient, which can fully meet the needs of industrial testing.Introduction
Research on Rapid Detection of Vitamin C with an Optic Sensor
Authors: He Bao Shan , Li Xue Qin , Zuo Chun Yan , Wang Dan , Wang Jin Shui
Published: July 2011

Based on the spectral absorption/reflection principles, a home-made optic sensor which included substrate, filtration membrane, reaction film and absorbent pad has been proposed and established to detect vitamin C rapidly. In the experiment, ferric ion was reduced to ferrous ion by vitamin C in samples, the reaction film color turned from yellow to orange-red upon the binding reaction of ferrous ion to phenanthroline. Results demonstrated that vitamin C concentrations were proportional to L values of the L a b color system. A good linearity was presented in the range of 0.25-2500 μg/mL. The correlation coefficient(r) was 0.980 and the testing time was about 2 min at room temperature.
Simplified Method for Considering Dynamic Second-Order Effects of Elastic SDOF System under Earthquakes
Authors: Han Feng Xia , Wang Zhi Jun , Huang Zong Ming
Published: July 2011

The structures subjected to large displacement under ground motion may be severely influenced by the structural second-order effects. This paper studied the dynamic second-order effects of the single-degree-of-freedom (SDOF) system under earthquake ground motions. The following achievements have been made: (1) the stiffness reduction coefficients considering and effects under static and dynamic analysis were deduced; (2) through numerical analysis, the accuracy of the formulas was verified.
Synthesis and Light-Emtting Diodes Properties of Two New Fluorene Based Copolymers
Authors: Huang Jian Hua , Ye Xiang Hui , Zhan Chuan Lang , Yu Gui , Liu Yun Qi , Yao Jian Nian
Published: July 2011

Two new conjugated copolymers, PFPh and PFTDP, comprised of alternating 9,9-dioctylfluorene and phthalimide (Ph) or thieno [3, 4-c] pyrrole-4,6-dione (TPD) have been synthesized via Suzuki coupling reaction. Polymeric light-emitting diodes (PLED) were fabricated with an ITO/PEDOT: PSS/PVK/Polymer/BCP/Alq/Ca:Ag configuration. The maximum brightness and maximum current efficiency of PLED are 2600cd/m2and 2.52 cd/A for PFPh, and 2300cd/m2and 1.13 cd/A for PFTDP, respectively, which are significantly improved compared with the reported alternating fluorene-unsubstituted phenylene/thiophene systems.
Volatilization of MgO from Ludwigite in Carbothermal Reduction-Nitridation Process
Authors: Liu Ran , Gao Yong Liang , Wang Xing Juan , Lu Qing , Xue Xiang Xin
Published: July 2011

Based on thermodynamic analysis, the reduction and volatilization of magnesium in ludwigite were studied using carbothermal reduction-nitridation method. The experimental result show that the total mass loss rate of samples increase with temperature rising, which the maximum is 52.88 wt% in the range from 1440°C to 1470°C. Magnesia in ludwigite was reduced and volatilized as gaseous magnesium vapour in the process of carbothermal reduction, and its mass loss rate go up to 98.138%. Part of the volatilized matter formed white powder deposited at the opening of furnace tube and adhered to tube wall together with boride/silicon volatilized. It was proved that there is volatilization of MgO from ludwigite in the process of carbothermal reduction-nitridation.
The Non-Combustibility of PTFE Fabric
Authors: Qu Li Jun , Guo Xiao Qing , Chi De Ling , Sun Ya Ning
Published: July 2011

The non-combustibility of PTFE fabric0s was investigated by Cone Calorimeter in this paper. Ignition parameter, heat release parameter, mass loss parameter and smoke parameter of PTFE fabrics were obtained. The Time to Ignition of PTFE fabric and PTFE/Nomex fabric were 60 and 24s respectively, and the Heat Release Rate were 9.28 and 65.52kw/m2 respectively. The Total Heat Release of PTFE fabric and PTFE/Nomex fabric increased with time, and the Total Heat Release of PTFE/Nomex was much higher than that of PTFE fabric. The Effective Heat of Combustion were 5.06 and 9.94mj/kg respectively, the maximum of mass loss rate of PTFE fabric was larger than that of PTFE/Nomex fabric, and the curve of mass loss rate of PTFE fabric changed rather slightly. It can be concluded that the non-flame properties of PTFE fabric was more remarkable than that of PTFE/Nomex fabric.
Synthesis and Characterization of Chitosan Based Ultraviolet Absorber with Groups of Benzophenone
Authors: Yu Shu Juan , Liang Chun Qun
Published: July 2011

2-hydroxy-4-glycidyl ether benzophenone(HGEBP) is synthesized with 2,4-dihydoxy- benzophenone(UV-0) and epichlorohydrin(ECH) as starting material, then a series of chitosan (CS) based novel ultraviolet absorbers (CS-g-UV-0) are synthesized by the reaction of chitosan with HGEBP in isopropylcarbinol in the presence of sodium hydroxide. The products(CS-g-UV-0) are characterized by means of Fourier transform infrared spectra (FT-IR), X-ray diffraction (XRD), and UV spectrophotometer. The results of UV absorption show that anyone of the grafted products has a strong ultraviolet absorption area ranging from 280nm to 350nm and the maximum absorption peak presents at 291 nm. It is found that the grafted products could improve the moisture-absorption and moisture-retention property with the increase of G% values.
The Finite Element Analysis of Effect Factor about the Shear Behavior of Cold-Formed Steel Composite Wall
Authors: Xu Chao , An Yu Hua , Bai Ai Hua
Published: July 2011

This paper adopts the finite element method to study the shear resistance of the first floor cold-formed steel composite walls in six stories residential structures, plastic shell element is used, materials nonlinearity and geometric large deformation are considered. The screws connecting sheathing and frame are modeled through coupling methods. Analyzing the influence of factors such as stud spacing，Brace and rigid bracing's establishment，component wall thickness to the shear behavior of cold-formed steel composite wall， these dates can provide certain theory for the actual project.
Synthesis and Crystal Structure of a New 2D Coordination Polymer [Ce(3,4-pydc)2]•H2O(3,4-pydc = pyridine-3,4-dicarboxylate)
Authors: Bai Feng Hua , Zhang Li Ping , Su Hai Quan , Zhang Lei , Zeng Shang Hong
Published: July 2011

A new 2D metal-organic coordination polymer [Ce(3,4-pydc)2]·H2O(1) was synthesized by hydrothermal reaction of Ce(NO3)3·6H2O and 3,4-pydc (3,4-pydc = 3,4-pyridinedicarboxylate). The structure was characterized by elemental analysis and IR spectroscopy. Single crystal was determined by X-ray single crystal diffractometer. The crystal belongs to monoclinic crystal system and P2(1)/c space group. Crystallographic data: a = 14.501(3) nm, b = 6.7980(19) nm, c = 14.590(3) nm, α = 90°, β = 94.497(2)°, γ = 90°, V = 1433.8(5) nm3, Z = 4. X-ray analysis reveals that the complex is a two-dimensional thick belt structure, and the hydrogen-bonding and p-p stacking interactions between belt layers extend the complex into a 3D supramolecular architecture.
Study Situation and Key Technology of Mobile Humanoid Robot
Authors: Zhao Tie Jun
Published: July 2011

With the increasingly aging societies coming, as a service robot, the mobile humanoid robot is worth making efforts to study. This paper mainly introduces the developing status of the mobile humanoid robot. The characteristics of five robots are presented. Key technology of the mobile humanoid robot is pointed out, and the problems needing further research are discussed.
Thermodynamic Calculation of Al-Cu Eutectic Alloy with Microstructure Simulation Using Phase Field Method
Authors: Tang Jin Jun , Jiang Jian Zhong , Tang Chun Hua , Chen Da Hui , Hou Li Qun
Published: July 2011

Phase-field method can be used to describe the complicated morphologies of crystal growth without explicitly tracking the complex phase boundaries. The conformation of volume free energy is very important for microstructure simulation with phase-field method. However, the conformation of volume free energy is still correspondingly simple and ideal at present. In this paper, a new conformation method of free energy is mentioned. Free energy of each phase at appointed states is calculated by Thermo-Calc software. In order to avoided calculation, free energy of each phase is fitted by multiple-point function according to sub- regular solution model. It is obtained that the free energy data and phase graph data of α phase, θ phase and L phase in the extension, temperature (791-841) K and component (0-35)Cu(at.%) with Al-Cu eutectic alloy. The new phase model is also founded, and used to calculate microstructure evolution of Al-Cu eutectic alloy.
Replacement of Cement with Rice Husk Ash in Concrete
Authors: Kumar Patnaikuni Chandan , Palli Malleswara Rao , Patnaikuni Indubhushan
Published: July 2011

In the present investigation, a feasibility study is made to use Rice Husk Ash as an admixture to an already replaced Cement with fly ash (Portland Pozzolana Cement) in Concrete, and an attempt has been made to investigate the strength parameters of concrete (Compressive and Flexural). For control concrete, Indian Standard (IS) method of mix design is adopted. Five different replacement levels namely 5%, 7.5%, 10%, 12.5% and 15% were chosen for the replacement study. A range of curing periods starting from 3 days, 7 days, 28 days and 56 days are considered in the present study. Series ranging from 5% to 10% RHA concrete but better compressive strengths at later ages though showing lower compressive strengths initially. However, split tensile strengths are lower for RHA concrete when compared to normal concrete.
Research on Diamond Wheel’s Specialties during ELID Ulterprecision Grinding of Silicon Nitride
Authors: Jin Wei Dong
Published: July 2011

Taking ultraprecision grinding of silicon nitride ceramic as an example, this paper mostly introduces some influences of diamond wheel’s specialties on the grinding process and surface quality during ELID (electrolytic in-process dressing) grinding of hard and brittle materials. Research indicates that grain size and concentration of abrasive material should be reasonably selected based on the surface roughness. And Inhomogeneity of concentration distribution along wheel circumference will result in heterogeneity of insulator layer state, which will bring difference in the number of abrasive grain in the grinding area, thereby changing the actual cutting depth of every abrasive grain. Dynamic balancing of grinding wheel should be accurately adopted to reduce eccentric mass, furtherly to avoid generating waveness on the workpiece surface. For the purpose of reflecting rightly compositive effect from eccentricity of wheel shape, roundness of the wheel and periodical vibration derived from eccentric mass, actual radial runout of grinding wheel should be well and truly measured and controlled based on the wheel’s surface profile during wheel is rotating at working speed.
Process Characterization of 40Cr Steel Roller by Laser Surface Alloying with Rare Earths Oxide Y2O3
Authors: Wu An Qi , Liu Qi Bin , Qin Shui Jie
Published: July 2011

To increase the mechanical properties of the metal rollers, Mo and Mo+Y2O3alloy powders were designed. And a kind of coating fabricated by a continuous wave CO2laser surface alloying(LSA) on 40Cr steel roller was obtained. The effect of Mo and Mo+Y2O3on microstructure, hardness and wearing resistance of alloying coating were studied by OM, SEM, XRD, microhardness tester and wearing tester. The experimental results indicate that the grain size in alloying coating is obviously fined, and the grain boundary is strengthened. The uniformity and density of microstructure are improved. The microhardness and wear resistance of alloying coating are significantly increased.