bluuebunny/crossref_metadata_2025 huggingface dataset:
A Designing of the Manufacturing Facility for Disposing of Greenhouse Gases
Authors: Cao Gao Fang , Yu Wei Wei
Published: April 2012

Atmospheric carbon dioxide levels increasing, the climate change has drawn increasing attention. But so far there is no good solution to this problem. This paper presents a simple and feasible way to achieve carbon dioxide liquefaction facility, to reduce carbon dioxide emissions, thereby to improve the climate of the new method. This method is not only technically simple and feasible but also quite inexpensive.
Effects of Technical Parameters on Process Stability and Microstructure during Continuous Rheo-Extrusion Process of 6201 Alloy Wire
Authors: Guan Ren Guo , Zhao Zhan Yong , Lian Chao , Chao Run Ze , Liu Chun Ming
Published: April 2012

In this paper, effects of technical parameters on process stability and microstructure during continuous rheo-extrusion process of 6201 alloy wire were investigated. The optimal process parameters for producing 6201 alloy wire are obtained. The casting temperature is from 720°C to 740°C, and the roll rotating speed is 15r/min. The 6201 alloy wire with good performance has been successfully manufactured. After heat treatment, the tensile strength of the product reaches 325 MPa and the resistivity reaches 32.47 nΩm, which is better than LHA2 conducting wire of China.
Research of DSP Virtual Laboratory Based on LabVIEW
Authors: Huang Fu Hai , Li Yan
Published: April 2012

In this paper the method of serial communication between LabVIEW and TMS320LF2407 will be introduced. For the COM port communication between PC and SCM, introduces a kind of serial communication method between PC and SCM by using the serial communication control of LabVIEW, and the detailed programming was presented. This system has been successfully realized by commissioning, and applied to the project, and the operation is stable and reliable, and can satisfy the design requirement and the function, and the system is provided with a good reference value for developing similar system.
Smart Car Design and Implement Based on SCM AT89C55 Application
Authors: Li Xiao Zhen , Zhang Jian Lin , Zou Wen Sheng , Kang Yao Ming
Published: April 2012

A microcontroller AT89C55 was used as the detection and control core of the electric car passing seesaw in the design. Reflective photoelectric switch LTH1550 -01 constitute the patrol line module to guide the car driving; High - performance magnetic sensitive precision small-angle tilt sensor WQH36 -45 was used to detect the state of equilibrium of the electric car; Bridge driver L298 was used to control reversing/forwarding rotation and PWM motor speed control; 12 - bit switched capacitor successive approximation ADC TLC2543 was used to sample electric car’s sensor signal; keyboard and LED display composed of I2C interface keyboard and LED driver ZLG7290 achieve the human-machine interface; voice playback was compose of the single-chip voice chip ISD2590 and small power amplifier LM386. Based on the above complete and reliable hardware circuit design , the use of sophisticated software algorithms to achieve the angle offset feedback loop speed control and self - correction , the exact line inspection guide , making the electric car in various stages can be accurately controlled .
A Comparative Study of the Effects of Sulfate Reducing Bacteria on Corrosion of Carbon Steel Q235 under Simulated Disbonded Coating with Different Width of Aperture
Authors: Zhao Ping , Yang Jia Xing , Zhu Peng Peng , Sun Cheng , Xu Jin
Published: April 2012

The effect of sulfate reducing bacteria (SRB) on the corrosion of Q235 steel has been investigated in the crevice under the simulated disbonded coating with aperture width of 1.0 and 0.5mm in the soil-extract solutions (SES) by using electrochemical methods. The results show that the existence of SRB in SES can cause corrosion potential of the working electrode to shift to a more negative value, and the formation of pitting on the surface of the electrode. Compared with the crevice width of 1.0mm, the corrosion potential of the electrode shows a little more positive at the crevice width of 0.5mm. The corrosion rate of the electrode increases with the increase of aperture width in the SES without SRB, however, decreases with the increase of aperture width in the SES with SRB. The results obtained indicate that either bio-film on the surface of the electrode formed by SRB in SES or aperture width has obvious influences on the crevice corrosion process of the carbon steel.
A Novel Feasible Purifying Strategy for Nano-Sized Calcium Phosphate Based Biomaterials
Authors: Zhou Wei , Zheng Jun
Published: April 2012

The present paper proposes a new purifying strategy which can be applied in rapid synthesis of nano-sized calcium phosphate based biomaterials. To understand the new preparation process, the synthesized nano-hydroxyapatite was investigated as model to explicate. The results showed that by using the new method, quantities of pure nano-HAP could be obtained, and the D-process efficiency could be adapted to improve to some extend. Comparing with traditional purifying processing, dialysis is efficient and much easier. It is anticipated that dialysis can be accepted an easy, efficient, promising feasibility strategy for nano-CP biomaterials mass production.
Analysis of Cyanazine and Atrazine in Cucumber by Pseudo Imprinted Solid-Phase Extraction Coupled with Liquid Chromatography
Authors: Yan Hong Yuan , Li Zhi Wei , Zhang Jing Yu , He Chang Qing
Published: April 2012

Two kinds of triazine herbicides (cyanazine and atrazine) in cucumber were analyzed by high performance liquid chromatography method coupled with pseudo imprinted solid-phase extraction (PISPE) as the clean-up arrays. The sorbent of PMISPE was synthesized by bulk polymerization using cyromazine as pseudo template and it could selectivly recognized cyanazine and atrazine from cucumber matrix. The mobile phase for separation and quantity analysis of cyanazine and atrazine was methanol-(0.8% acetic acid-water) (55:45, v/v) with a UV detector being set at 224 nm. The result showed that good linearity of the two trazine herbicides was obtained in a range of 0.004 µg/g ~ 0.400 µg/g with r2≥0.9996 and the recoveries at three spiked levels were ranged from 93.8% to 108.5% with RSD less than 3.4% (n=3).
Analysis of Heat Dissipation and the Energy Conservation in Cast Iron Dryer Head of Paper Machine
Authors: Lv Hong Yu , Bian Xue Xun
Published: April 2012

Analyzed the result computed of finite element heat transfer, discovered the temperature difference between the two sides of head is very small. Therefore its hot loss is very big. In addition, the temperature of dryer head flank is basically the same. Therefore the dryer head's heat dissipation can be simplified as a question of univariate heat conduction, also simplified to be a big plate heat conduction problem. This article offers simple algorithmic analysis of dryer head temperature field algorithm and the heat dissipation computation, and studied the head temperature computation and the heat dissipation analysis with a heat preservation board added. The importance that increased heat preservation board for energy conservation is pointed out.
Application of Orthogonal Test in Numerical Simulation of Aluminum Sheet Forming
Authors: Tan Zan Wu , Xu Kong Lian , Hu Su Yun
Published: April 2012

Sheet forming is a high-volume fabrication method for producing lightweight materials components. An important goal in manufacturing research is to determine the optimum method for producing products with less cost. In this paper, combined with the orthogonal test method and finite element method (FEM) simulation, the analysis was carried out to analyze the key process factors such as stamping force, fillet radius, and friction coefficient. Using orthogonal test method can reduce the testing time, learn how the molding parameters influence the total equivalent plastic strain, acquire the best match forming parameters, and give guidance for the better condition
CO2 Capture by Polyethylenimine-Silica Mesoporous Hybrid
Authors: Fu Xin
Published: April 2012

polyethylenimine-modified mesoporous hybrid material with the polyethylenimine (PEI) containing 50 wt% was synthesized. It exhibits a high adsorption capacity of 210 mg/g-PEI.The adsorbed CO2 could be desorbed completely from the sample at 150 oC.
Metal-Modulated Growth of Au Nanoparticles by Electropolymerized 8-Hydroxyquinoline Films
Authors: Pan Hong Cheng , Liu Wei Hong , Li Xue Peng , Ren Yan Bin , Liu Shan Hu
Published: April 2012

8-hydroxyquinoline (8-Hq) films were electropolymerized on indium-tin-oxide-coated (ITO) glass slides by using cyclic voltammetry. The 8-Hq electropolymerized on ITO electrode (8-Hq/ITO) was immersed in a 5-mL solution containing 0.01 M phosphate buffer solution (PBS, pH 7.0), 0.8 mM cetyltrimethylammonium chloride, 20 µL of HAuCl4 (1%, w/w), and 50 µL of Au nanoparticle seeds. The mixture was incubated at 57oC for 3 h. Then Au nanoparticles were grown and deposited onto the 8-Hq/ITO electrode. It was found that some metal ions (Zn2+, Cd2+, Mg2+, and Pb2+) could inhibit the growth of Au nanoparticles. The metal-modulated growth of Au nanoparticles was studied by UV-vis spectra and differential pulse voltammetry.
Effects of the Parameters of Sloping Plate Process on Microstructures of A2017 Alloy
Authors: Guan Ren Guo , Zhao Zhan Yong , Lian Chao , Chao Run Ze , Liu Chun Ming
Published: April 2012

In this paper, effects of the parameters of sloping plate process on microstructures of A2017 alloy were investigated, and semisolid ingot of A2017 alloy was prepared. The grain size of the ingot prepared by the wavelike sloping plate is much smaller than that prepared by the flat sloping plate. The primary grain becomes rounder and smaller with the increment of the sloping plate length. High preheating temperature of the plate reduces the nucleation rate of the melt and leads to coarse microstructure. When the casting temperature is 720°C, the sloping angle is 45°, and the wavelike plate length is between 400mm and 500mm, semisolid ingot of A2017 alloy with fine and homogeneous microstructures can be obtained. The reheated microstructure of semisolid ingot is mainly composed of spherical solid grains and the melted liquids and is suitable for semisolid forming.
Interpretation of the Wood Drum of the Wa Nationality from a Symbolic Semiotic Perspective
Authors: Li Wu Jian , Hu Rui Bo , Ye Xi , Li Na , Chen Yu
Published: April 2012

As the public voice to protect traditional culture is upsurging gradually today, it is significant to study the wood drum of the traditional Wa culture so as to better protect and exploit the culture. This essay, mainly consisting of three parts: the origin of the wood drum, its functions and its cultural meanings, aims to interprate the important role of the wood drum in the Wa community form a new perspective. Through the study of the three aspects, it is concluded that the reasons why wood drums have played such a crucial role in the Wa community are mainly derived form the primitive society the Wa nationality was in and its surroundings. Therefore, to exploite the wood drum of the Wa nationality can not only protect the nation’s traditional culture but can also improve its tourism economy.
Calculation and Plot of Predominance Area Phase Diagram for Cu-S-O Ternary System
Authors: Li Shang Yong , Hu Yuan , Xie Gang , Li Jun Han
Published: April 2012

The typical chemical reactions of metal were analyzed in this paper, and the two-phase equilibrium line calculated model was obtained. By use of the physical properties database, the design of chemical reactions and the compounds were to be determined. Through the calculating the two-phase point and three-phase point ,the predominance area phase diagram algorithm based on the physical properties database was formed, which has clear physical meaning and accuracy calculation result, and also whose result was consistent with that of the literature.
Study on Reaming High-Precision Thin Hole in Hardened Steel by Ultrasonic Vibration Reamer
Authors: Zhang Jian Zhong , Li Tao , Zhang Yue
Published: April 2012

It has been one of the difficulties that high-precision thin hole is machined. The supersonic vibration reaming acoustic system is installed in the lathe. The supersonic wave energy applies to reamer to create pulse power on the cutting process. The separating vibration cutting is achieved to make the pulse force. The tests on reaming surface quality and precision are carried. The quality of surface and accuracy machined by this method is more than that by grinding. The reaming process is stability. The cutting force is greatly reduced. The cutting temperature is at room temperature. The tool life is greatly increased. Surface quality and shape precision is greatly improved. The regulations of the ultrasonic vibration reaming thin hole in hardened steel are also summarized. The test results show that the ultrasonic vibration reaming by reamer is of very superior cutting mechanism. It is efficient cutting methods for high-precision thin-hole machining of hardened materials,
Reliability Optimization Design of Mechanical Parts Based on Global Optimization
Authors: Li Ling Fang , He Zhe Ming , Luo You Xin
Published: April 2012

Generally, action of constraints exists in reliability optimization design of mechanical parts. Usually, general optimum methods are adopted in reliability optimization design, so the local solution is obtained. Aimed at this situation, a global optimum method was introduced by Lingo13.0 software. The result shows the model is practical and effective and its solution is global solution better than the result with general optimum method. As the method is simple, it is worthy to spread in optimum design
Deflection and Resonance Frequency Shift of a Microcantilever Induced by Chemisorption: Oxygen on Si(100)
Authors: Zhang Ji Qiao , Huang Gan Yun , Feng Xi Qiao , Yu Shou Wen
Published: April 2012

An energy-based model is presented to predict the deflection and resonance frequency shift of a microcantilever induced by chemisorption. The chemisorption of oxygen on Si(100) surface is taken as a representative example. The connection between the continuum-level cantilever responses (e.g. static deflection, resonance frequency) and the molecular-level interactions (covalent bond interactions) are established. The mechanical behavior of the cantilever on the density of adsorbed atoms/molecules and the property of the substrate is investigated. This study is helpful for designing microcantilever-based sensors which have many technologically important applications
Dumbbell Test Method for Evaluation of the Early Age Cracking Property of Concrete Material by Stress Risers
Authors: Liu Yan , Luo Zhi Gang , Cao Jie
Published: April 2012

This article develops one new test technology, dumbbell test method, for evaluation of the early age cracking property of Concrete Material under constraint conditions. Its exercise of stress risers could lead concrete to crack quickly, providing a quick method to evaluate the early age crack performance of concrete material and to perform simulated test at job site conveniently. By this method, the anti-cracking performance of different concrete material can be evaluated quickly in the construction site.
The Reaction between Alkali Vapor and the Theoretical Composition MgAl2O4
Authors: Liu Ya Qin , Li Yong , Hong Shan Shan , Ma Guo Dong , Gao Yuan , Li Bin , Wen Ru Liang , Qian Zhi Ming , Huang Jing Heng
Published: April 2012

The theoretical composition was made from MgO-rich MgAl2O4 (MR66) and alumina powder. The static crucible method was used to study alkali-resistance of the block samples. It has been observed that alkali steam permeated into the hole and reacted with corundum particles that produced β-Al2O3 by means of XRD, SEM and EDS. It led to volume expansion, cracks and melting erosion of corundum particles. The specimen of the 32% content of MgO has good physical and chemical properties and excellent alkali erosion performance. So the specimen is suitable for oxy-fuel combustion for glass melting furnace.
Thermal Behavior, Mechanical Properties and Microstructure of Polypropylene Composites Filled by Calcium Carbonate Whiskers
Authors: Jiang Zhong Li , Sun Qiu Ju , Zhang Yan Ran , Li Lin
Published: April 2012

CaCO3 whiskers were treated by stearic acid and the surface property of the treated whisker were evaluated by activation index. When the mass fraction of stearic acid was 4.0%, activation exponential increased to 80.0% almost from zero. The composites were prepared by blending with polypropylene and the treated whiskers. The performance of the composites, such as thermal behavior, mechanical properties and microstructure, were analyzed with differential scanning calorimetry, scanning electron microscopy and tensile testing. The results showed that CaCO3 whisker played heterogeneous nucleation to induce crystalline behavior of PP phase in the blends and the crystallization rate of PP phase also increased because of CaCO3 whiskers intervening. Moreover thermo-decomposing temperature and tensile strengths of the blends all increased with increasing whisker content, except a little less than that of pure PP as filling 3.22% CaCO3 whiskers, but the elongation at break increased with increasing whisker content.
Development of Coolsmart Functional Knitted Fabrics
Authors: Feng Lan Qing , Liu Yan Jun
Published: April 2012

Based on the main features of coolsmart fiber and the theory of knitted fabric structures， two structures of sports and leisure knitted fabrics with fast moisture absorption, description and anti-bacterial function are introduced in this article, detailing the selection of raw materials, pattern formation effect, the machine code organization and cam set out.
Determination of Chitosan Oligosaccharide Content by Acetylacetone Spectrophotometry Method
Authors: Xu Ze Ping , Yang Chuan Lun , Zhang Xin Qing , Wang Xiu Zhi , Huang Bao Sheng
Published: April 2012

Objective: To establish a common method to detect the content of chitosan oligosaccharide. Methods: Chitosan oligosaccharide was hydrolyzed completely by concentrated hydrochloric acid, and the solution was regulated into neutral with NaOH. Then, determined the absorbance in 525nm, and substituted into the regression equation to determine the results. Results: The results showed there was a good linear relationship when the concentration of chitosan oligosaccharide ranged from 0.02 mg/mL to 0.12 mg/mL, r2 = 0.999. The average recovery of chitosan oligosaccharide samples was 99.25%. Conclusion: The method is sensitive, accurate and simple. It is applied to determine of the content of chitosan oligosaccharide.
Numerical Simulation and Thermal Analysis in Milling of Titanium Alloy
Authors: Li Bin
Published: April 2012

Milling of titanium alloy is usually a finishing process, therefore stable cutting process must be guaranteed at first. Temperature distributions were studied in this paper with the help of finite element method (FEM) for its significant influence on the quality of machined part. In this paper, numerical simulation was conducted by using FEM software on the whole cutting process for TC4 alloy mounting parts in an effort to investigate the metal flow behavior. The thermal simulation results obtained were compared with the cutting temperature.
Recovering Obliterated Engraved Vehicle Identification Number on Vehicle Frame Surfaces by Etching Technique
Authors: Jin Yi
Published: April 2012

Chemical etching, which is the most sensitive method to recover obliterated serial numbers on metal surfaces. This paper studied the method of recovering obliterated engraved vehicle identification number on vehicle frame surfaces by etching technique. Experiment research indicates that for vehicle frame materials containing Al and Si components, the use of concentrated hydrochloric acid : acetic acid : ethanol=2:1:1( volume ratio) reagent shows good effectiveness; For vehicle frame materials Mn and Si composition, the use of concentrated nitric acid: acetic acid: ethanol=1:1:1 ( volume ratio) shows good effectiveness. This recovering method has far-reaching application prospects, especially in the robbery cases involving vehicle identification numbers juggled.
Optimization of Sapanwood Pigment Dyeing Process for Organic Cotton Knitted Fabric
Authors: Zhao Shu , Luo Zi Wei
Published: April 2012

To maintain the green and ecological features of the organic cotton knitted fabric, the extraction of sapanwood pigment and the optimization of dyeing process for the organic cotton knitted fabric are studyed in this paper. The results show that dyed by the optimized sapanwood pigment dyeing process, the washing fastness, perspiration fastness and wet rubbing fastness of the organic cotton knitted fabric reached the desired levels.
Effects of Thermal Gradient and Solidification Time on Porosity Content of A201 Aluminum Alloy Castings
Authors: Kuo Y.S
Published: April 2012

The purpose of the present study was to discuss the effects of local solidification time and thermal gradient on porosity content in long solidification range A201 aluminum alloy plate castings. With systematic change in the riser size, together with variation of thickness and length, were cast in different kinds of molds. The sand molds with end chill for the plate castings were made of 100% silica sand. The porosity content of A201 aluminum alloy was affected by the local solidification time and thermal gradient at same time in this study. The correlation between porosity content and any individual thermal parameter is found to be split into 2 bands, each being associated with one of the two thicknesses of plate castings. The higher the thermal gradient, the lower the porosity content was measured in the A201 aluminum alloy plate casting. And high thermal gradient with short solidification time will get lower porosity content in aluminum alloy castings
The Properties of MgO-C Materials with Different Graphite Size Distributions
Authors: Liu Guo Qi , Li Hong Xia , Yang Jin Song , Yu Jian Bin , Yang Wen Gang , Ma Tian Fei , Qian Fan
Published: April 2012

Monolithic stopper is one of the functional refractories. The security and continuity of the continuous casting maybe irrupted by the abnormal condition of monolithic stopper. MgO-C material composite monolithic stopper is often used to cast Ca-treated steel. But the thermal expansion of MgO-C materials is relatively large and there is a poor thermal matching between rod part and body part. To improve thermal shock resistance of MgO-C materials, the properties of MgO-C materials with different graphite size distributions are researched. The results show that 1000 mesh graphite addition will decrease thermal shock resistance, fracture energy and thermal expansion will increase. MgO-C materials with combined addition of 595 and 199 graphite present good thermal shock resistance. The trends of thermal shock resistance for MgO-C refractories by immerging molten steel methods agree with that of Rst.
Feasibility to Fabricate the 45° Slant with Anisotropic Silicon Etching in NaOH Solution
Authors: Limcharoen Alonggot , Pakpum Chupong , Limsuwan Pichet
Published: April 2012

The experiments to study the feasibility to fabricate the 45 slant on p-type (100)-oriented silicon wafer were done. The various mask shapes, rectangular, cross, circle and boomerang, were patterned on the SiO2 mask by utilizing the conventional photolithography and dry etching process for investigating the anisotropic wet etch characteristic. The edge of masks were align in two crystal direction, 110 and 100 that is allowable to get a better understanding about the crystal orientation and the angle between planes in a crystal system. The very low etch rate,  50 nm/min, process regime was selected to fabricate the 45 slant with the concept is the lowest of an overall etch rate in the system to reach the level that is possible to detect the (110) plane. The etch recipe can be used for the next development work to built a housing of the laser light source for applying in a data storage technology.
Effects of Annealing Temperature on Optical Properties of Bi3.4Nd0.6Ti3O12 Films by RF Magnetron Sputtering Method
Authors: Zou Yan , Liu Qiu Xiang , Jiang Yan Ping , Tang Xin Gui
Published: April 2012

Bi3.4Nd0.6Ti3O12 (BNT) thin films have been prepared on Si (100) substrate by RF magnetron sputtering method. The crystalline structures were studied by X-ray diffraction. The surface of the films have been observed by SEM. The reflectivity was measured by n & k Analyzer 2000 with the wavelength from 190 to 900 nm. The optical constant, thickness and the forbidden band gap were fitted. The results showed that with the annealing temperatures raised from 600 to 750 °C, the reflectivity index decreased from 2.224 to 2.039, and the forbidden band gap decreased from 3.19 to 2.99 eV. The possible mechanism of the effect of annealing temperature on the optical properties was discussed.
Detection Methods of Roller Pressure to Design the Chromatism of Dyed Fabrics
Authors: Tan Yan Jun , Liu Chang Nan , Zhao Yang
Published: April 2012

This paper takes CIE1976 L*a*b* chromatism formula as standards, and it takes K/S values and chromatism as characterizations. We design the internal relations and numerical relationships of the fabric chromatism according to the roll’s pressure’s change in pad dyeing, and adjust the padder roller pressure on both sides to eliminate chromatic aberration.
Preparation and Characterization of Activated Carbon Fiber Supported Nano-TiO2
Authors: Guo Xiao Ling , Wang Xiang Dong , Ben De Ping
Published: April 2012

Nano-TiO2 powders were synthesized by a sol-gel method using tetrabutyl titanate as the precursor, and then the composites of ACF(activated carbon fiber) supported nano-TiO2 was prepared by impregnating method. Tests of the amount of loaded TiO2 showed that three impregnating times was adequate. The Nano-TiO2 powders and composites were characterized by XRD, SEM, and BET surface area method. XRD tests showed that nano-TiO2 powders prepared by this way are anatase phase, and the mean size of the particles is about 11.5nm, when the calcination temperature is 673K. BET results showed that compared with original ACF, the surface area of the composites decreased slightly, indicating the impregnating process did not change the porous structure of original ACF. SEM result indicated that most of the nano-TiO2 particles as the size of 10-20nm were homogeneously dispersed on the surface of ACF.
Relationship between Surface Froth Features and Flotation Indexes in the Flotation of a Sulphide Copper Ore
Authors: He Gui Chun , Feng Jin Ni , Wu Yi Peng , Xiang Hua Mei , Qi Mei Chao
Published: April 2012

Froth images are pre-processed, which are acquired at the flotation laboratory. Digital image analysis techniques are used to analysize these froth images and their grey histogram and to extract statistical texture features of those froth images. Finally, the relation model for statistical texture features of those froth images and flotation index is established by RBF neural networks. A simulation showed that the relation model is higher precise
Adsorption Characteristics of Pb(II) from Aqueous Solution onto Na-Bentonite/Poly AMPS Composite
Authors: Xiao Hai Yan , Gao Kai Sha , Li Qiu Rong
Published: April 2012

Na-bentonite/poly AMPS composite were prepared as an adsorbent for the removal of Pb (Ⅱ) from aqueous solutions. Pb (Ⅱ) adsorption experiments show the optimum pH and the bentonite content are pH 4.0 and 5g Na-bentonite /10g AMPS, respectively. Experimental data were described by Langmuir and Freundlih isotherms, and the correlation coefficient (R2) shows that the adsorption follows the Freundlich adsorption model.
Effect of Ir Addition on Grain Size and Mechanical Properties of Au-Ag-Cu-Pd-Pt Procelain Fused Metal
Authors: Chen C.H. , Fu Jian Xun , Hwang Weng Sing
Published: April 2012

Adding small Ir element into Procelain Fusing Metal alloy can produce finer grains of PFM. Mechanical properties and dispersion of metal oxide can be improved by grain refining. In order to understand the effect of grain refining and mechanical properties by adding Ir into Au70.1-Ag12.4-Cu10.3-Pd6.2-Pt1-IrX alloy, series of experiments are carried out. There is an obvious effect of grain refining when adding 0.1wt% Ir into alloy. More than 0.1wt% Ir addition will no longer change the grain size obviously. Yield strength and Ultimate tensile strength are getting higher after adding more than 0.1wt% Ir. We found that these two mechanical properties will reach the maxima when 0.3wt% Ir added. And there is a little descent on mechanical properties when 0.5wt%, 0.7wt% of Ir existed in alloys.
Performance Study of Jutecell Fiber and Yarn
Authors: Li Jing Jing , Meng Jia Guang , Li Ning
Published: April 2012

As a starting point of the subject, the basic performances of Jutecell fiber and yarn were studied, the fiber cross-sectional shape, composition and mechanical properties of Jutecell fiber were first tested and analyzed systematically. In process of evaluating the quality of the yarn , its fineness , evenness, twist, strength, moisture content , hairiness properties were taken for the important reference parameters to carry on test and analysis. The blended yarn of Jutecell fiber and cotton fiber[1], with the blended rate of 50/50, Yarn fineness of 22.6tex, Fiber specification of 1.33dtex*38mm, were used in the research of the subject.
First-Principles Study on the Structural, Electronic and Elastic Properties of Alloyed Austenite with Co and Ni
Authors: Lv Z. Q. , Shi Z. P. , Li Y.
Published: April 2012

The crystal structure of alloyed austenite distorted after Ni and Co replaced Fe. The crystal type of austenite changed from cubic structure to tetragon or orthorhombic structure due to the influence of Co and Ni. The ratio (B/G) for γ-Fe (C) is equal to 2.841, which is higher than that for other alloyed austenite with Co and Ni. The workability of alloyed austenite with Co and Ni are poorer than γ-Fe (C). The formation of alloyed austenite needs more energy than γ-Fe (C) at ambient conditions.
Optimization of 3D Pocket Machining Using Multiple Tools
Authors: Yu Ming Rang , Zhang Ying Jie , Zhang Ding
Published: April 2012

In numerical control machining, the number and the size of the cutting tools in use have a significant effect on machining efficiency. This paper puts forward a method to select the most appropriate group of cutters for 3D pocket machining using NC machine tools, which aim to minimize the total machining time. Considering the material is removed layer by layer in roughing, three scan-line filling algorithm is proposed to calculate the cutting area of every layer, which is necessary to calculate the machining time. After the total machining time of each group of cutters is calculated, the optimal group of cutters can be determined easily. Both the theoretical analysis and the simulated results show that the proposed algorithm can improve the efficiency of NC machining.
Research Development of Residual Stress Determination with Generalized Stress Increment Testing Method
Authors: Xue Huan , Ge Rui , Zhu Hong Chuan , Peng Wen Jie , Li Rong Feng
Published: April 2012

The idea of generalized stress increment testing method which contains both the stress free method and the stress superimposing method for the residual stress determination is developed. The research development of full and partial stress free testing methods is reviewed. Different testing methods are characterized according to the different working conditions. The stress superimposing testing method of residual stress is different from the stress free one. A new stress field is introduced adding on the initial state. The residual stress is indentified by the strain increment differences of the material detected in the stress superimposing process. The traditional stress superimposing testing method including hardness and indentation method are reviewed. The principal and application of two new type of stress superimposing testing methods of residual stress are introduced, their disadvantages are also indicated.
Design and Analysis of Triaxial MEMS High Measure Range Accelerometer
Authors: Shi Yun Bo , Zhao Rui , Liu Jun , Li Ke Jie
Published: April 2012

Aming at the demand of the filed of missile fuse and other weapon systems, a triaxial high- g piezoresistive accelermeter with double-terminal fixed beam-mass structure which can measure x and y axial acceleration and four-terminal fixed structure which can measure z axial acceleration. The design and simulation were also verified using Matlab and ANSYS, the simulation results show that the sensitivities in the x and y axial can be to 1.41µV/g, the sensitivity in the z axial can be to 0.56µV/g. And the transverse sensitivities of accelerometer in triaxial are eliminated effectively. The results of simulation analysis show that the structure can work with the measure range of 150,000g
Preliminary Research on Manufacturing Technology of Thin Bamboo Veneer Consolidated Composite Floor
Authors: Hu Nan , Li Xian Jun , Wu Yi Qiang , Li Xin Gong , Xue Zhi Cheng
Published: April 2012

In this paper, the new bamboo-based consolidated composite floors were fabricated with thin bamboo veneers which used as decoration layers, wear resistant layers, high density fiberboards and equilibrium layers through assembling and scuffing. The effect rules of the composite floor on properties were preliminarily studied by three factors: hot-pressing temperature, pressure and time. The results showed that the wear resistance and surface bond strength of the thin bamboo veneer consolidated composite floor significantly increased with the rise of hot-pressing temperature. In the scope of resources, the effect of hot-pressing pressure and time on properties of the floor is not significant. The optimizing technology is hot-pressing temperature 170°C, pressure 3MPa and time 40s/mm in this study. The thin bamboo veneer consolidated composite floor is an excellent floor decorative material, which has good physical and mechanical properties.
Fluid Analysis of Impeller Wheel Wave Energy Detector System
Authors: Wang Shi Ming , Zhang Fu Xi
Published: April 2012

Wave energy is a sort of clean energy existing in ocean with mass of storage, and the way how to observe, detect and measure is the very first step of exploring wave energy and other purpose. Shanghai Ocean University has focused this field for long, and proposed a kind of impeller wheel wave energy detector system which is based on buoy or other small offshore equipments. To make the wave energy detector efficiency and precise, some analysis is very necessary especially the fluid analysis. With the analysis results some optimizations for structure and combination of the impeller wheel are chosen to accomplish design target. And the method of CFD simulation and theory will be a reference for relevant research.
Development of a New Ring Inflatable Flotation Machine
Authors: Yang Lin Lin , Ning Wang Yun , Zhao Yu Qing
Published: April 2012

This paper summarized the current advantages and disadvantages of flotation column, put forward a new type of flotation device - ring inflatable flotation machine and patented. The study showed that the ring inflatable flotation machine has the advantages of low energy and consumption, little abrasion, the probability of attachment and collision is high of particles and bubbles, selection and sweep the election time and frequency adjustment flexibility and large size range of separation. In this paper, the structure diagram of the ring inflatable flotation machine, and do the conditions experiment. Compared the separation efficiency and sorting index with traditional XFD-type flotation machine. Experiment showed that the ring inflatable is economic, effective and high sorting index.
Influence of Material Continuity of Functionally Graded Coating on Interface Crack
Authors: Sun Chang Qing , Wei Hua , Gao Hong
Published: April 2012

In this paper, aiming at three material parameter functions of functionally graded coating (FGC) which have different continuities, the influence of functionally gradient coating material continuity on the fracture behaviors of the crack on the interface between the base material and coating is studied. The results show that when the functionally graded coating structure is under a tension load, if the ratio of maximum elastic modulus of the FGC to the elastic modulus of the base is less than 10, the functionally graded layer which has C02 continuity can help to improve the fracture resistance of the interface crack, and if the ratio increases continuously, the functionally graded layer which has C13 continuity can help to improve the fracture resistance of the interface crack, which is of great guiding significance for practical engineering design.
The Super-Thin Rod Cylindrical Honing Technology Research
Authors: Zhu Lin , Pan Lin
Published: April 2012

The super-thin rod cylindrical grinding is a problem in the machining, super-thin rod with large slenderness ratio, poor rigidity, large roundness error after grinding, and with low processing efficiency. This study uses cylindrical honing processing super-thin rod parts, and designing the super-thin rod cylindrical honing head, carrying on a honing test. The results show that the super-thin rod cylindrical coarse honing capacity reach up to 0.002mm/double stroke(length 1698mm), surface roughness reach up to Ra 0.8 ~ 0.025μm after honing, roundness error reach up to 2μm. It fully shows that super-thin rod cylindrical honing technology has high precision, low surface roughness, flexible production processing and high efficiency.
Analysis of Influence to the Connect and Seal Ability of Tubing Connection of Inner Pressures
Authors: Dou Yi Hua , Cao Yin Ping , Zhang Fu Xiang , Yang Xiang Tong
Published: April 2012

To know the stress distribution of tubing connections with varied inner pressures for further understanding of the influence of pressures to the connection and seal ability, finite element model of API tubing connection was established and the Von Mises stresses and contact pressures of tubing connection was analyze by full make-up torque and varied inner pressures with nonlinear finite element method. It was found that the contact pressures and stresses on engagement threads may be increased with limited inner pressure. Meanwhile, stresses of engagement threads on both ends increased more sharply than others. And plastic deformation even breakage of engagement threads may occur if the inner pressure exceeds 70MPa
Structural Optimization of a Novel Coaxial Magnetic Gear
Authors: Man Yong Kui , Zhang Shuo , Zhang Yi Sheng , Hao Wen Sheng , Zhang Jun Feng , Li Hua
Published: April 2012

Compared with the traditional mechanical gear, permanent magnetic gear has some unique advantages, such as high efficiency, noise free, zero friction, and overload protection and so on. However, its applications are always constrained due to its unstable or not smooth torque produced by this kind of magnetic gear. Based on the structure of the magnetic gear, this paper introduces a coaxial magnetic gear with a double-layer structure composition, which could provide the higher and stable or smooth torque.
Based on the ANSYS of Small and Deep Hole a Bit Cutting Transient Dynamic Study
Authors: Wei Ping , Han Jiang , Geng Hui Lian
Published: April 2012

Introduces the general twist drill analysis, Through the continuous experiment and practice, obtained some processing key question method. As a result of small and deep hole parts of the scene processing efficiency is low, the improper selection of cutting quantity will cause premature wear of cutting tool. The traditional method is the empirical method and experimental method to solve the waste of material and time comparison. This article mainly is the finite element analysis software, the analysis of the ordinary drill thermal stress, transient dynamics, to solve the optimization of cutting parameters before processing, improve processing efficiency, save cost.
Research on Throttle Optimal Control of Flipper Jack for Hydraulic Support
Authors: Jia Chun Qiang , Li Wei , Yu Ling
Published: April 2012

To solve the problem of support speed of hydraulic support flipper, the match relations between the flipper throttle control and shearer cutting coal speed are analyzed, the AMESim simulation model of the throttle optimal control for hydraulic support flipper jack is established, the simulation results show that flipper can be supported timely by speed optimal control of flipper jack which improve the reliability of the system and provide certain theory basis to meet the miner safety and high efficiency production.
Analysis on Affecting Factors of General Heat Exchange Efficiency of Target-Type Impacting Air Washer by an Orthogonal Experiment Method
Authors: Yan Su Qian , Li Ji Chao , Huang Xiang , Wen Li
Published: April 2012

General heat exchange efficiency is one of important economic indicators for the evaluation of the air washer. Based on the amount of test data analyzed by an orthogonal experiment method, this efficiency is mainly affected by the following factors in the air washer of the target-type nozzle namely air mass flow rate, water pressure, nozzle aperture, nozzle spacing, and obtains the optimal combination scheme of the four factors. Orthogonal test methods which had been verified by multiple regression equation has high reliability(R＞0.9)and good prediction for the level of significance of various factors.
Research on Influences of the Coarse Aggregate Size on the Cracks of the Reinforced Beam
Authors: Sun Hong Quan , Ding Jun
Published: April 2012

This paper gives the influences of the coarse aggregate size on the cracks of the beam with different aggregate sizes under static loads. The coarse aggregate sizes are ranked into three classes: small size (4.75mm ~ 19mm), big size (19mm ~ 37.5mm) and mixed size (4.75mm ~ 37.5mm). The developments of cracks of three reinforced concrete beams with the different of coarse aggregate sizes under the static loads are researched. The results show that under the action of the same loads, The reinforced concrete beams with the big aggregate size and mixed aggregate size have almost the same maximum crack width, while the maximum crack width of the beam with small aggregate size is less than formers. Using fractal theory, the fractal dimension of the cracks is studied. The result shows that the aggregate sizes have significant effect to the cracks on the reinforced beams.
Performance Model Construction and Optimal Design for High-Precision Balance Sensor
Authors: Li Ju Tao , Guo Wei
Published: April 2012

Based on performance driving design concept, sensor of high-precision balance is researched. Performance index system and performance model of sensor are established based on analytic design approach and finite element method, furthermore, the design process of structure of the sensor is proposed. The performance of the sensor has achieved integrated optimization, such as sensor linearity, counter electrode coupling displacement and range.
Finite Element Analysis of Anti-Reflective Crack for Geosynthetic in Asphalt Overlay of Airport Runway
Authors: Luo Zhi Gang , Liu Yan , Wang Sui Yuan , Diao Bo
Published: April 2012

To make clear the work mechanism of geosynthetic in asphalt overlay under the aircraft wheel loads, one 3D dimension finite element model was constructed on the basis of the general purpose finite element software ABAQUS. Numerical calculation results with different geosynthetic modulus are presented in this paper, and show that it is very limited for geosynthetic to reduce bottom stress and surface deformation of asphalt overlay, and asphalt overlay bottom is in compression state, thus, geosynthetic can not exert it’s film tension function, namely the main role of geosynthetic is not to bear loads together with asphalt overlay, but to improve stress state of asphalt overlay for preventing cracks appearance or delaying cracks expansion.
Comparative Analysis of Parabolic and Hyperbolic Flexure Hinges Using Closed-Form Equations
Authors: Hu Jun Feng , Xie Wen Juan , Li Pei , Cui Xiang Fu
Published: April 2012

The comparative analysis of a parabolic and hyperbolic flexible hinges were presented. The closed-form compliance equations in the working and non-working plane can be derived by using the Castigliano’s second theorem. In order to compare the relative performance of parabolic and hyperbolic flexure hinges, a ratio function between specific compliances of the two hinges is defined. We analyzed the non-dimensional ratios of working plane and non-working plane compliance to show the relative properties of parabolic versus hyperbolic flexure hinges. The analysis results has showed compared to a hyperbolic flexure, a parabolic flexure can produce more desired output and is slightly less sensitive to axial effects under identical loading conditions. Meanwhile, the comparative study on the parabolic and hyperbolic flexure hinges can provide a theoretical basis for choosing them.
The Process Optimization of the First Ball Bonding for Copper Wire
Authors: Zhang Wei , Wang Kang , Wang Chun Qing
Published: April 2012

Copper wire bonding has obtained prevalent owning to its economic advantage and superior electrical property. However, the replacement of gold wire with copper wire introduces hardness related issues as copper is much harder than gold. This article reports investigations of the process optimization of ball bonding for 1.8mil copper wire. The results showed that the suitable ranges of the three key parameters were: contact force was 100~120gf, bond time was 15~25ms, and bond power was 100~110dac. When the input energy was too low, it was hard to get effective bonding. However, excessive input energy would cause chip crater and serious extrusion of metallization layer.
Orientation Schemes Choice for Aquatic Inserting Piles Based on Gray Relation Analysis
Authors: Hou Yan Jun , Wu Lin Feng
Published: April 2012

In the process of rapid orientation device design for aquatic inserting piles, piles were fixed position using straight and steady function of the edge piles ahead. Piles were inserted to riverbed inside steel casing without horizontal current velocity. Three kinds of orientation schemes were put forward. To scientifically and accurately choose the best scheme, the evaluation index system was established in the way of expert's mark. The gray relation analysis method was adopted to analyze each scheme, synthesize each factor, and finally educe the optimal scheme.
Design and Analysis of Automotive Generator Stator Windings Based on Ansoft
Authors: Huang Hui Ping , Yang Cheng Wu
Published: April 2012

In order to improve the performance of automotive generator stator windings ,the paper design a method of automotive generator stator windings by two –three phases windings.This method reduce coil cross , shorten end connections and improve the thermal resistance of the generator.Meanwhile, this paper analyze magnetic field of stator windings by ansoft finite element analysis software,the armature magnetic field and its harmonic content are analyzed to verify the validity of this design.
Research and Development of High Efficiency & Energy Saving Series, High-Voltage & Flame Proof Three Phase Asynchronous Motor for Fan
Authors: Zong Rong Zhen , Qiu Yu Jiang
Published: April 2012

In order to save energy, decrease the loss and improve the technology level of high voltage flame proof three phrase asynchronous motor for fan, the condition, problem and development trend of the motor are studied in the paper. The motor structure, wind path system, electromagnetic scheme, insulation structure, electrical explosion-proof structure are improved, and non electric explosion-proof theory and low noise design are firstly applied in the research and development of motor. The efficiency of the motor is improved 2% by the method of optimizing the structure of motor and improving the making technology. The new motor not only has high efficiency and advanced and reliable structure, but also is safety in use, convenience in maintenance, has better social and economical benefits and better market prospect.