bluuebunny/crossref_metadata_2025 huggingface dataset:
The Study of Two-Step Dip System of Conveyer by Different Pre-Treatment
Authors: Yen Chien Kuo , Hsing Wen Hao , Chen Shih Yang
Published: July 2011

In this study, the PET/Nylon woven fabrics first treated with infrared radiation and microwave, then dipped isocyanate solution. The surface of the fabric had treated by physical and chemical processing. Adhesion strength between fabric and fabric up rise to 37.4%, and treated by microwave up rise to while adhesion strength between fabric and rubber by up to 52.2%.
Composited Silver-Contained PA 6 Electrospun Fibers with Spunbond Nonwovens for Filtration Applications
Authors: Pan Yi Jun , Chuang Wei Sheng , Lin Chao Yu , Chu Chun Hua
Published: July 2011

By using electrospinning method, polyamide 6 (PA 6) nanofibers containing 1 wt% of AgNo3 were spun from different concentrations solutions (15-25 wt%) for use as composite filter media. The silver ions in PA 6 nanofibers were reduced by ascorbic acid solution to silver particles offering antibacterial properties to the final filter after electrospinning. The results show, fibers with mean diameters less than 160 nm were prepared for use as filter media by electrospinning. The diameter of electrospun fiber was proportioned to the viscosity of PA 6 solution but was inversed to the applied electrical voltage. The viscosities of PA 6 solution were decreased by adding of AgNo3 from which brought more irregular formation of electrospun fibers. The filtration efficiency of spunbond nonwoven would improve greatly by compositing the electrospun PA6 web with or without silver.
Uniformity of Nanofiber Alignment by Electrospinning
Authors: Pan Yi Jun , Yen Chien Kuo , Cheng Feng Wei , Hsing Wen Hao , Chuang Wei Sheng
Published: July 2011

Electrospinning of polyacrylonitrile was used to investigate the effect of horizontal vs. vertical fiber deposition methods and operating variables on the degree of nanofiber alignment. A high-speed camera and Fiji image analysis software were used to assess differences and changes in the degree of fiber parallelism, allowing for effective analysis of the impact of operating variables on fiber parallel alignment. The results show that the strength of the electric field affects the fibers to assume a parallel alignment. Too weak the electric field, the fibers are unable to form a straight bundle, but too strong a field results in chaotic fiber alignment. The distance between the collectors influences the angle distribution of the fiber parallel alignment greatly. Comparing the effect of horizontal and vertical electrospinning on fiber alignment shows that horizontal results in a more optimal degree of parallel fiber alignment.
Research on Dissolve Oxygen Modeling Based on Neural Network
Authors: Gao Guo Dong , Zhang Wen Xiao , Yu Gong Zhi , Sui Jiang Hua
Published: July 2011

The structure, characteristics and principles of BP neural network model are described in this paper. First, three impact factors of the dissolved oxygen are selected as the sample input of network, and then the parameters of BP neural network are selected, such as network structure, learning algorithm, output layer transfer function, learning rate and so on. Finally, the BP neural network model is established and trained, in order to approach compensate the effects of improves non-linearity. The simulation results show that BP neural network is practical and dependable in the field of dissolved oxygen modeling and has nice applied prospect.
Tearing Behavior of the Polyurethane-Coated Fabrics with Five Different Silicone Contents
Authors: Zhan Zhi Lan , Chen Yi Ren , Wang Jing Song
Published: July 2011

The trapezoidal tearing method was utilized for the polyurethane coated fabrics with five different Silicone contents. The correlation of elastic modulus, shear modulus and tearing strength were studied and the results showed that the tearing strength increased following the decrease of elastic modulus. Finite element results were analyzed for the coated fabrics by using orthotropic model. The calculation results showed good agreement with the experimental results.
Effect of Acid Modification on the Properties of Potato Starch Pastes and Starch Film
Authors: Wang Wen Yu , Jin Xin , Hou Shuan Qing , Zhang Yu Feng , Sha Xiao Xu
Published: July 2011

The effect of acid modification using 1mol/L HCl on viscosity, thermal properties and mechanical properties of potato starch pastes and starch film were investigated. After acid modification, the surface of starch granules did not show more roughness and viscosity of starch pastes become lower. The results of DSC indicated that acid should act on amorphous region of starch firstly and would act on the crystallization region with the longer treatment time. In the very close viscosity scope, the mechanical properties of starch films were increased obviously after acid modification.
Formation of Nano-Textured Silicon Surface Layer (or Nanowires) by Silver Ion-Assisted Etching
Authors: Tang J , Zhang Hong Yan , Ma Z.Q
Published: July 2011

To obtain an ultralow surface reflectance and reach broadband antireflection effects,in this paper, silicon nanowires (SiNWs) layer has been fabricated by low-cost and easy-made silver-assisted etching techniques.The morphologies, reflectance and surface recombination of the samples were separately characterized. The ultralow reflectance below 3% from 300 to 800 nm under normal incidence has been realized in the case of ~ 1 μm long SiNWs whose geometry structures approximate to multi-layer gratings stack and the refractive index gradually increases from the top to the bottom of substrate. However, surface recombination of SiNWs deteriorates due to numerous dangling bonds and residual silver. Therefore, a trade-off between antireflection effect and recombination loss is the key to the electronic device.
Process Technology and Mechanical Properties of Polylactic Acid Ply Yarns and 316L Stainless Steel Braids
Authors: Lou Ching Wen , Chen Wen Cheng , Chen Yueh Sheng , Wen Shih Peng , Chang Chin Wei , Lin Jia Horng
Published: July 2011

Biodegradable polymer has been widely used in surgical suture, dressing, artificial bone and other bone-related applications. However, when compared with the human cortical bone, the pure polymer obviously did not have enough strength. The present study aimed to give preliminary insights from a pilot study of designing a scaffold of polylactic acid ply yarns composited with stainless steel (SS) braids. To evaluate the fabrication processes and alkali effects on the individual materials, the different heating temperature and alkali treating time and alkali concentration were applied to clarify the changes in mechanical strength. The experimental results showed that the strength was not significant declined with alkali and heating treatments. The retained mechanical strength was kept at 100-120 MPa and ultimately led to bone-like mechanical properties.
The Evaluation of Physical Property and Manufacturing Process of Functional Warp Knitted Fabrics with Variation of Weft
Authors: Lin Jia Horng , Huang Yu Tien , Lin Chin Mei , Yang Yi Chang , Lou Ching Wen
Published: July 2011

In recent years, the scientific progress has improved human life quality and changes the concepts of heath and heath care. It has been approved that the bamboo charcoal has various functions, including air cleaning, water purification, deodorization, far infrared radiation rate and anion amount. The bamboo charcoal fiber and bamboo charcoal yarn are applied extensively in the textile industry. In this study, PET fiber was used as warp, and PET fiber, bamboo charcoal nylon fiber and stainless steel fiber employed as weft to weave three groups of warp knitted fabric. The variation of far infrared radiation rate, anion amount concentration, air permeability, water absorption, flexibility of these three groups of fabric were examined. The results indicate that the far infrared radiation rate of these three groups of fabric attained 0.8. The anion amount concentration of bamboo charcoal and bamboo charcoal / stainless steel warp knitted fabrics has reached 490-495. Finally, the air permeability of bamboo charcoal / stainless steel warp knitted fabrics achieved 281 cm3/s/cm2.
Fast Evaluation of Pectin Content in Ramie Using NIR Techniques
Authors: Jiang Wei , Han Guang Ting , Zhang Yuan Ming , Chen Jian Hua
Published: July 2011

Near-infrared (NIR) prediction model of ramie pectin content was established in this research. Wet chemical analysis method which was based on Chinese national standard was conducted for getting calibration data, and NIR data of 60 ramie samples were collected using acousto-optic tunable filter (AOTF) near-infrared spectrometer. The NIR model of pectin of ramie were derived by partial least square (PLS) regression. Prediction of chemical composition of independent ramie samples showed that R/SEP values of pectin is 17.87. Such NIR calibration model can be utilized by ramie fiber manufacturers and breeding workers, in order to better manage the degumming process and evaluate the quality of ramie varieties.
A Novel Method for Preparing Electroconductive Cotton Fabric
Authors: Wang Feng , Li Bao Ran , Qi Yue , Liu Sheng Dong , Wang Li Juan
Published: July 2011

Cotton fabrics were used as substrate to develop an electroconductive textile. Due to hydrophilia and porosity of cellulose, a novel electroless nickel plating process was attempted, in which activation and electroless plating were combined. In order to improve the wettability of cotton fibres, specimens were treated by NaOH solution and were bleached in NaClO solution. Then, the treated fabric was plated by using the novel process. The surface resistivity of the plated specimens reached to 15.34 mΩ·cm, which indicated the plated cotton fabrics have good conductivity.
The Study of Far Infrared Emissivity Influence by Rate Visible Spectrum
Authors: Hsing Wen Hao , Lin Chin Yow , Hsing Ya Lan
Published: July 2011

In this study, visible on the far-infrared emissivity of knitted fabric, its rate of change of far infrared radiation were observed. In this study, light exposure time for 20,40,60 minutes, the experimental results, the longer the kind of light source distribution is much higher surface temperature will be relatively higher rate of infrared radiation, when the light source when the suspension began measuring data, the light source, the far infrared radiation rate of about 0.941 ~ 0.975 when reached will begin to flatten, after 15 minutes returned to its emission rate of about 0.937, when the far-infrared light irradiation of polyester fabrics through the far infrared radiation values are effectively increase, so the light irradiation intensity of far infrared radiation rate of the subjects were characterized by light and the length of time to improve the fabric surface temperature change and this temperature rise is the key to the experiment
Processing Technique of Sound Absorbent/Thermal-Insulating/Flame Retardant Composite Material
Authors: Lin Jia Horng , Huang Chen Hung , Tai Kuo Cheng , Lin Chia Chang , Tsai Yi Ting , Lou Ching Wen
Published: July 2011

This research is to develop a processing technique for fabricating the three-dimensional nonwoven fabric with the sound absorption capability and flame retardant capability. Furthermore, the physical properties and functionalities of the three-dimensional nonwoven fabric are adequately evaluated and tested. Several nonwoven fabrics are fabricated by two polyester fibers with different denier numbers and the low-melting-point fibers. Then, multiple nonwoven fabrics are used to make three-dimensional nonwoven fabrics through lapping, needle-punching process. After being reinforced by heating in the hot air circulation oven, the physical properties of three-dimensional nonwoven fabrics such as tensile strength, breathability, sound-absorption coefficients, limiting oxygen index (LOI), and thermal conductive coefficients are properly evaluated. Subsequently, the influence of fiber faintness on the performance of sound-absorption and thermal insulation of three-dimensional nonwoven fabrics is carefully examined through the obtained results.
Study on the Processing Technology and Mechanical Properties of Nonwoven Fabric Composited by Recycled PP Selvedges
Authors: Lin Jia Horng , Lin Chia Chang , Chen Jin Mao , Li Ting Ting , Lin Ming I , Lou Ching Wen
Published: July 2011

Functional nonwoven products have superiority such as quick mass-production, short processing time, wide sources for raw material, low cost and high output etc. They have been widely studied and promoted in advanced countries. However, comparing with selvedge processing, they brings considerable burden to environment. So in this paper, we chose low cost polyester (LPE) and low melting point fiber (LMPE) respectively blending by 50 wt% through the process of mixing, blowing, carding, laying, and needle punching etc. to form nonwoven fabric in which the needle density was adjusted. Finally it is found that 103 needles/cm2 was optimal after mechanical testing. And then different proportions of PP selvedges were placed in the middle of two optimal nonwoven layers by sandwich structure, and mechanical properties of PET/LMPET/PP fabric produced after thermo bonding and cooling was tested. According to the optimal production evaluation for functionality, these products may apply to reinforced interlayer in general protective clothing, protective glove, reinforcement in simple building structure and stiffening geotextiles in the future.
Analysis on Dynamic Performance of FlatValve in Water Hydraulic Piston Pump
Authors: Huang Guo Qin , Yu Jin , He Ying
Published: July 2011

Dynamic performance of a water hydraulic piston pump with flat valves was analyzed．Its mathematic model was established and influence factors were studied by simulation. The results show that reducing clearance volume, lighting spool quality and increasing spring stiffness are favorable to promote the performance of flat valve. In addition, higher vacuum degree and too high rotational speed will make flat valve delay more seriously. Work pressure also has influence on the opening delay to flat valve．
Health Monitoring of RC Frame Structure to Shake Table Excitations
Authors: Liao Wen I , Hwang Jenn Shin , Sung Yu Chi , Wang Shiang Jung
Published: July 2011

Structural health monitoring of RC structures under seismic loads has recently attracted attention in the earthquake engineering research. In this paper, a piezoceramic-based device called “smart aggregate” was used for the health monitoring of RC frame structures under earthquake excitations. A two-story one-bay RC moment frame instrumented with smart aggregates was tested using a shake table. The distributed piezoceramic-based smart aggregates embedded in the RC structures were used to monitor the health condition of the structures during the tests. The sensitiveness and effectiveness of the proposed piezoceramic-based approach were investigated and evaluated by analyzing the measured responses.
Study of Microwave Reflection Behaviour in Fe3O4 Magnetorheological Fluids
Authors: Yu Nan Hui , Fan Ji Jun
Published: July 2011

Owing to its unique properties and wide engineering applications, magnetorheological fluids (MRF) has become a hot study area in the field of smart materials. In this paper experimental study of the microwave reflection behavior in MRF was carried out. The results indicated that at the same frequency the microwave reflectivity of MRF decreased with the increasing of magnetic field strength; and with the particle concentration increasing, microwave reflectivity first increased, then decreased, there is a critical concentration of 15%. Under the same magnetic field, with the increasing of microwave frequency, it first decreased, there is a lowest point at 9.2GHz, and then it increased. Usually, it is considered that the change of internal structure of MRF under external magnetic field is the main reason for the regulation behavior of microwave reflectivity.
Detecting Centroid Projection for a Quadruped Robot with Hand-Fused Foot Based on ARM
Authors: Zhang Yu Xiao , Zeng Xian Quan , Wang Xin Jie
Published: July 2011

Because weight is unsymmetrical for the robot with hand-fused foot, a method is found to calculate the centroid projection coordinate from the perspective of Newtonian mechanics. Centroid projection coordinate of the robot is detected with ARM, pressure sensors, distance measuring sensors, and multiplexer. Software is designed for the centroid projection detection from 3 aspects as multiplexer chip selection, A/D conversion operations, and centroid calculation. In the experiment, several groups of data were gained, which contained sensors data and centroid projection coordinate. Centroid projection detection has certain reference value for gait generation and path planning.
Application of Wavelet Analysis in the DPIV Information Processing for the River Model Test
Authors: Pan Dong Zi , Li Ying , Chen Gang
Published: July 2011

It’s important to measure the horizontal distribution of the 2D velocity field for model verification and scheme selection at model test in the tidal estuary. Digital particle image velocimetry (DPIV) has become an accepted technique for the measurement of two- and three component planar velocities in a wide variety of fluid flows, which has advantages of high speed and nil interference. However, sometimes DPIV images are overexposure, uneven distribution of the gray values, and obscurity on the edges of the particles, which will affect the accuracy of flow data by inversion. Wavelet transform has good characteristics in time-frequency localization, and it has been widely used for image preprocessing, image compression, image restoration, image feature extraction and pattern recognition. A wavelet-based multi-resolution technique was applied to analyze the 2D measurement results of a DPIV system in this paper. In the different stages: boundary treatment, noise reduction, identification and elimination of the error vector, which are applicable to the processing of the DPIV information for getting the velocity vectors with higher resolution and precision through the continuous wavelet transform of velocity data.
Turbine Blade Aerodynamic Optimization Based on Variable Dimensionality Model
Authors: Ao Liang Bo , Li Yuan Sheng , Li Lei , Wen Zhi Xun , Yue Zhu Feng
Published: July 2011

The aerodynamic optimization for turbocharger turbine blade is studied using variable dimensionality analysis technology. The aerodynamic optimization procedure is decomposed to two steps: two-dimensional (2D) optimization and three-dimensional (3D) optimization based on the 2D optimal results. The quintic polynomial method with continuous three order derivatives is used to present section profile of three sections, root, middle and tip of blade. The 2D aerodynamic analysis and optimization are carried separately for different sections. Aerodynamic optimization for turbine blade is driven by the combination of global and local optimization arithmetic, with the 2D optimization blade as initial value, and profile parameter as design variable. The result shows that the calculation time is shortened and the optimization efficiency is improved, compared with the full 3D optimization under the same effect.
Preparation of Zirconia-Aluminum Titanate Nano-Composite Powder
Authors: Zhang Li Fang , Dong Cui Zhi , Zhang Hui Fang , Wang Xiao Yan , Ma Shu Long
Published: July 2011

With zirconium oxychloride, aluminium sulphate and titanium oxysulphate as the basic raw materials, zirconia-aluminum titanate nano-composite powders were prepared with the liquid precipitation method. The nanocomposite powders were detected with XRD, TEM and TG-DTA.The results show that recovery ratio of zirconia and aluminum titanate precursosr is higher, with respective pH about 9.5, 5.5 and concentration of 0.1 mol dm-3 in the system. About several nanometer zirconia and 100 nanometer size aluminum titanate can be obtained when the precursors are respectively roasted at 600°C and 1000°C.
The Modeling and Performance Analysis of Automatic Drilling & Riveting System Based on Modular Design
Authors: Xu Ying , Zhao Yu , Wang Ting , Hu Xiao Ping
Published: July 2011

Assembly deformation is one of the most important factors in the aircraft thin-walled parts’ riveting, which determines the plane’s fatigue life and assembly quality. Firstly, A new type of automatic drilling & riveting system used for aircraft’s panel component riveting was studied and designed based on function modular theory. It includes system designing, modeling and assembling by using PRO/E software. Then, Rivet’s stressed deformation was analyzed through finite element analysis. It also explored the law of riveting force which changed the whole process of automatic drilling & riveting, and it can be used as a proposal to improve the riveting quality.
The Design and Characteristic Analysis of New MR Fluid Damper
Authors: Zhu Shi Sha , Zhao Yin , Qu Li Juan
Published: July 2011

The structure principle and working model of the MR fluid damper using in the automotive suspension are described in this paper. It is concluded that the damping force is related to structure parameters, shear yield stress and viscosity of MR fluid through analysis result. As the effective length of damping channel under magnet field is restricted to the configuration of MR damper, a new MR damper with optimizing the damping channel of lord RD-1005-3 MR damper is presented and mechanical models are severally established for the two MR shock absorbers. It has been shown that the maximum damping force of new damper has dramatically increased comparing with the original one through external analysis.
Hoop Stress Analysis of High Grade Heavy Wall Thickness Pipe in Hydrostatic Test
Authors: Yang Yan Hua , Yang Zhuan Zhao , Liu Xing Liang , Yang Hao Xue
Published: July 2011

The distribution of hoop stress calculated and simulated by Finite Element Method and theoretical calculation in this paper, when the hydrostatic pressure was carried out on the line pipe of Φ 762mm×31.8 mm API SPEC 5L[1] X70 longitudinal seams submerged arc welding(LSAW). The results of simulated by Finite Element Method were accord well with that of theoretical calculation, both of them shown that the hoop stress deviation between pipe inside surface and outside surface was nearly 40MPa, which was about 9% of the hoop stress of outside surface. Besides, the influence of the D/t(diameter-thickness ratio)on the hoop stress were also researched, which shown that the larger the value of D/t was , the fewer that influence on the hoop stress, when D/t=200, the deviation was less than 1%; Or else, the D/t may cause a great stress gradient in the direction of the thickness, even when the D/t=42, the deviation was up to 5%. So that, the effect of the d/t should be taken into account when calculating the hoop stress of pipe with D/t≤42. In other word, a new hydrostatic pressure formula for the heavy wall thickness pipe( D/t≤42) was put forward and adopted when calculating its hydrostatic pressure, that was P =c* Sh (Do2 - Di2) / (Do2 + Di2), where, c, specification coefficient; Sh, hoop stress; Do, outside diameter; Di, inner diameter.
Analysis of LEACH Protocol Based on Ant Algorithm
Authors: Hu Yu , Wang Jing
Published: July 2011

According to high energy losing caused by directly communication between cluster heads and Sink node in LEACH algorithm, a new algorithm based on ant algorithm is formally deriver in this paper. The algorithm takes advantage of the features of ant algorithm, i.e. being easy to be realized, and supporting multi-path to build cluster routing, through the information of its distance and remaining energy of nodes. Then the distance and remaining energy of the neighborhood were integrated in the computation of pheromone concentration. The results of simulation show that compared with LEACH, the algorithm can get a better balance of the energy dissipation and prolong the network lifetime.
Based on Risk Source Pipe Leakage Emergency Device and Sealing Method Research
Authors: Yan Hong Wei , Kou Zi Ming , Wu Juan , Wang Xian Hui
Published: July 2011

Along with the rapid development of chemical industry and the progress of science and technology, there exist safety risks for a large number of risk source pipelines. On the basis of the conventional containment measures for risk source leakage, this paper designed two types of emergency devices and corresponding rapid closure methods. One type is the pipeline leak sealing airbag inside the risk source. It is constituted by sealing institutions, diversion institutions, keep institutions and fixed institution. During the work, the sealing airbag gets inflated to realize the rapid closure inside in the piping. It is applicable to the sealing of the heat, water supply, the chemical pipeline, and even large pipe leakages. It also provides the diversion function. The second type the external leakage sealing gasbag for the risk source pipelines. It is compositioned by the belt type rubber air mattress,left and right sides of adjustable bits semi-manipulator mechanism. It is mounted using the belt type rubber layers of tilt superposition around in pipe outside. When needed the air gets inflated inside the gasbag, making each layer of air cushion tension bridle and mutual extruding, to execute rapid closure for the pipeline leakage. These two types of devices are easy to carry, require low professional training, while are highly efficient for the fast closure of the pipeline leakages.
Analysis of Flow Field for Stirring Tank with Complicated Cavities Based on FLUENT
Authors: Zhou Si Zhu , Peng Xiao Bo , Wang Jun Qiao , Qiao Chun , Shi Min , Li Chao
Published: July 2011

The internal structure of blender truck’s stirring tank is complicated, and accurate analysis of its flow field is important for design and manufacture. This paper carries out numerical simulation of three-dimensional flow field in mixing process by the compute fluid dynamics (CFD) software FLUENT, uses the multi-reference frame and standard k-ε turbulence model to simulate the density in three different conditions. The research result indicates that RNG k-ε turbulence model can simulate the internal flow field in the stirring tank. The tank has a series of advantages, such as large displacement, few left sand, low consumed power and short mixing time, and it has good promotional value.
Experiments on Dicing Monocrystalline Silicon Wafer Using Micro Abrasive Water Jet
Authors: Lei Yu Yong , Jiang Dai Jun , Liu Ke Fu , Tang Pu Hua
Published: July 2011

The experiments on dicing monocrystalline silicon wafer using micro abrasive water jet turning were performed. A specifically designed water jet machine tool with four axes was developed and a specially designed cutting head has developed, in which the inside diameter of orifice and focusing tube is f125 mm and f500 mm respectively, while the silicon carbide solid abrasives with average diameter of 25-100 mm was used. In order to control the flow rate of micro abrasives precisely, an abrasive feed system with auger mechanism driven by DC motor reducer was used. The diameters of monocrystalline silicon bars are around 50 mm. Two basic turning methods, i.e. turning with stationary jet and turning with moving jet were applied. The preliminary experimental results such as kerf width, wafer thickness, surface quality etc. were analyzed. It was found that micro abrasive water jet can be used to precisely turn brittle materials like monocrystalline silicon. The turned wafer with thickness of 1 mm above could be achieved. A thinner wafer less than 1 mm is difficult to obtain during experiments because of cracking or chipping. Experiments demonstrate that the wafer surface has macro stripping characteristics similar to linear cutting. It was observed that there is less waviness and smooth surface on the turned wafer when with moving jet. And it depends greatly on the water jet pressure, feed rate of the jet, rotation speed of silicon bar, abrasive particle size as well as flow rate of abrasive. The detailed analysis indicates that the surface roughness of turned wafer with moving jet is around Ra 1.5-5.6 μm, while that of turned wafer with stationary jet is around Ra6.3 μm, when other conditions are same. The results show that surface quality turning with moving jet is obviously better than that of stationary jet. Smaller surface roughness of turned wafer could be obtained when finer abrasive is used. The experiment shows also that the wafer is typically tapered with either the stationary jet or moving jet. There is a concave on the turned surface when feed rate of the jet is too low or dwell time is too long. This is attributed to the jet rebound from one face to the other. Therefore there is an optimizing rotational speed during turning. This study indicates that dicing mono crystalline silicon wafer using micro abrasive water jet turning has potential application in semiconductor industry.
Design of Multi-Functional Infant Handcart
Authors: Du Qiu Lei
Published: July 2011

Design of infant handcart involves mechanical design, man-machine engineering, art and many other fields. This paper discusses the brand-new concept of function design of infant handcarts under the premise of comfort and safety, which makes ordinary infant handcart have more practical value and social efficiency.
Stiffness Analysis of Structures Using Shape Memory Polymer Composites
Authors: Zhang Shu Jie , Cheng Lei
Published: July 2011

Shape Memory Polymer Composites (SMPC) is a compound of resin matrix and fiber reinforced material. It has advantages of lager restoring force, lower density, higher stiffness and strength. The stiffness of laminate and thin walled tube using SMPC materials was discussed in this paper. Experiment was made to verify the different structures influences on deployment at the same temperature. The initial stiffness of laminate decrease at 40°C to 50°C, but that’s for tube was about 70°C to 80°C. It illustrated that the structural influence should also be concerned except the Tg. At the last of the paper, stiffness of laminate, tube and semicircular were calculated respectively to see the influence of structure at normal temperature.
Study on the Sensing Property of Carbon-Coated Filaments
Authors: Zou Feng Yuan , Xu Yu Hong , Chen Hu , Ye Ling
Published: July 2011

This paper analyzes sensitivity, linearity, repeatability, strain relaxation of Carbon-coated Filaments (CCFS) in resistance tensile strain to evaluate CCFS’s sensing property. The results show that the relative resistance changes present two stages, change is stable in 0-6mm tensile range, while it amplitude increases in 6-15mm. CCFS’s linearity is better as number of filament increasing, while sensitivity is lower; if number is the same, CCFS sensitivity reduces as twist’s increasing. The 12F CCFS has poor repetitiveness and seriously flabby phenomenon when tensile change greatly.
Analysis of the Formation Mechanism of Hollow and Cricoid Stria in Formed Coke
Authors: Ma Ming Jie , Liu Quan Run , Huang Shan Xiu
Published: July 2011

Under certain experimental conditions, the formed coke with hollow and cricoid stria. Through the perfect supposition about briquette carbonization process, the formation mechanism of the hollow and cricoid stria in formed coke is analyzed and the property of physical and chemical change and their conditionality relationship during briquette carbonated are demonstrated by use of the rules of heat conduction, the chemical reaction in the melting stage of colloid matter in coal and hydrodynamics. The conclusions from above analysis has an important instruction for the preparation mechanism of other allied carbon stuff.
Influence of the Surfactant on the CdTe Nanomaterials Morphology
Authors: Dong Cui Zhi , Zhang Li Fang , Wang Xiao Yan , Zhang Ming Xi , Cui Zhi Min , Zhang Qing Jun
Published: July 2011

Because of the good photoelectric learning properties and chemical properties, CdTe nanocrystalline as an important Ⅱ-Ⅵ clan semiconductor materials has been used in LEDs, photonics, in aspects of materials and biomarker and so on. W/O microemulsion method has the peculiarity of tester simpleness, easy manipulation, room temperature react etc. In this paper CdTe nanoparticles was synthesized in CTAB/cyclohexane/isobutanol/water quatemary microemulsion system in alkaline condition and nitrogen. The morphology of the final products were characterized by X-ray power diffraction, transmission electron microscopy. according to the means, this paper researches the effect of surfactant contentration to morphology. The result is that the different morphology can be obtained through the different CTAB concentration. Finally, according to TEM chart, this paper infers the formation mechanism of the CdTe.
Enriching Indium Using Neutralization from Solution Bearing Indium
Authors: Li Yong Gang , Yang Da Jin , Peng Jian Rong , Li Xiao Ying
Published: July 2011

An experimentation project has been put forward to enrich indium from sulfuric acid leaching solution bearing high content of indium: preneutralization using calcine---reduction using zinc sulfide concentrate---neutralization using limestone for precipitating indium, and ascertained optimal dosage of reagent in every procedure through experiment under certain condition: the dosage of calcine is 1.3 times of theoretic value, the dosage of zinc sulfide mineral concentrate is 2.2～2.3 times of theoretic value, the dosage of limestone is double of theoretic value. On this optimal condition, the straight recovery rate of indium is more than 97%, and the content of indium sediment from precipitating is more than 0.1%.
Investigation of Ultraviolet Transmission Characteristics of Detecting Window in Ultraviolet Corona Inspector
Authors: Dong Zheng , Huang Da Gui
Published: July 2011

Ultraviolet (UV) corona inspector is used to detect corona according to the ultraviolet radiation of the discharge. High detecting sensitivity of the inspector requires high ultraviolet transmission property of the detecting window. In this paper, high performance JGS-1 (type name of glass) ultraviolet quartz glass is used as the inspector detecting window material and the ultraviolet transmission characteristics of the glass is studied. A new method with the smart corona detecting module to test the ultraviolet transmission parameter of quartz glass is demonstrated. The comparison results of UV spectrometer and this new method manifest that JGS-1 quartz glass has good ultraviolet transmission character and the new test method with corona detecting module is direct and feasible.
Study on Wet Picking/Wet Repellence at the Grain Direction of Offset Paper
Authors: Yang Yong Gang
Published: July 2011

The wet picking and wet repellence of offset papers were studied usingIGT-gst2printability tester according to change printing conditions as printing speed and the amount of fountain solutions. It was showed that the phenomena of wet picking and wet repellence occurred in turn on the surface of offset papers with increased printing speed and the amount of fountain solution. In addition, in contrast with fountain solutions, printing speed had greater influence on the phenomena of wet picking and wet repellence of offset papers.
MOSFET Performance Manufactured on <100> Silicon Wafer Using CESL Strain Technology with Temperature Effect
Authors: Wang Mu Chun , Yang Hsin Chia , Liao Wen Shiang
Published: July 2011

Tensile and compressive silicon nitride films as contact etch stop layers (CESL) are deposited on the poly-gate of N/PMOSFETs providing the strains to the channels. Different strained engineering technologies, previously determined by various processes and firmly verified by testing, set up different environments for carriers to transport. It is quite reasonably conclusive that compressive CESL benefits NMOS devices more while tensile CESL favors PMOS devices more. This phenomenon may be also true as the temperature effects are taken into concern. Higher temperatures tend to thermally disturb the carriers making the effective mass modified. The consistency and the known techniques can be applied to the nano-node generation development.
Study on Effect of Spring Materials on the Comfort of Bed
Authors: Li Li
Published: July 2011

By selecting different elasticity coefficients, the result of that the pressure distributions on contact human body and human’s subjective feelings were tested. Through analyzing and comparing, the conclusion was reached: 1) different elasticity coefficients of mattresses would affect the comfort on human body; 2) the medium elasticity coefficient of mattresses would provide maximum comfort; 3)the conclusion was validated by both objective test results and human’s subjective feelings.
Evaluation of Comprehensive Accuracy to the Opto-Electrical Stabilization/Tracking Device
Authors: Li Yan , Zhang Yong
Published: July 2011

Opto-eletrical stabilization/tracking device has the need to improve its accuracy due to the wide use in the field of observation, measurement equipment on the mobile correspondingly. The paper analyzes error sources of stabilization and tracking based on system working principle, and expatiates the effect of some error items including disturbance moment, assembling error of gyro etc. Furthermore, according as the probability theory, the paper expresses the comprehensive accuracy and obtains the evaluation method of device accuracy. Finally, it gives the example of evaluation on the direct stabilization/tracking device.
Application of Metal Powder Metallurgy Technology in Prepartion of Friction Materials of the Railway Vehicles
Authors: Shang Feng , Zhou Hai Xia , Qiao Bin , Li Hua Qiang , He Yi Qiang
Published: July 2011

With the speed up of the train, higher performance demands are put forward to the materials which have friction function. The friction materials produced by power metallurgy technology have a lot of advantages, such as good wear resistance, better thermal conductivity, bearing high lord, work reliably and so on. So they are used widely in the fields such as auto industry, aerospace and so on. The application of metal powder metallurgy technology in preparation friction materials of railway vehicles was researched in this paper, such as brake-shoe, brake lining of train braking, pantograph slide of electric locomotive, electrify boots slider of the maglev train and so on. This kind of friction material has superior performance and better prospects.
The Detection of Cypermethrin on the Surface of Apple by IR Micro-Imaging
Authors: Li Xiao Ting , Zhu Da Zhou , Wang Dong , Pan Li Gang , Ma Zhi Hong , Wang Ji Hua
Published: July 2011

IR micro-imaging technology is a new kind of analytical technology, which combines direct-visualizing image and infrared spectroscopy analysis. Each pixel in the IR micro-image is a whole IR spectrum, therefore, IR micro-image contains not only the information of spatial distribution but also the information of spectrum with hundreds of wavelength points. In this study, the feasibility of using IR micro-imaging to detect cypermethrin on the surface of apple skin was discussed, both cypermethrin single substance powder and the apple skin that was sprayed with cypermethrin single substance solution were used as research objects, IR micro-image and infrared spectrum were all analyzed. The results showed that IR micro-image of cypermethrin single substance powder could effectively reflect the information of spatial distribution, and the characteristic peak corresponding to molecular structure of cypermethrin could also be observed in the IR spectrum which extracted from IR micro-image of cypermethrin single substance powder. In the infrared spectrum of the apple skin that sprayed with cypermethrin single substance solution, four characteristic absorption peaks corresponding to cypermethrin which were located at 1591 cm-1, 1489 cm-1 , 1290 cm-1and 801 cm-1 were observed, which confirmed that there was cypermethrin existed on the apple skin. The present study indicated that the detection of cypermethrin on the surface of apply by IR micro-imaging technology was feasible, which provided a good foundation for the detection of fruit and vegetable pesticide residues by IR micro-imaging technology.
Microstructure and Wear Properties of TiC-Al Composite Fabricated by Field Activated and Low-Pressure Assisted Combustion Synthesis
Authors: Hu Qiao Dan , Luo Peng , Zhang Meng Xian , Song Mou Sheng , Li Jian Guo
Published: July 2011

A novel method termed field activated and low pressure assisted combustion synthesis (FALPCS) was developed for an in situ fabrication of TiC-Al composite from Ti, C and Al elemental powders. With the Al content of 30 wt% and application of a pressure as low as 2 MPa, a highly dense sample was successfully obtained on a versatile Gleeble thermal simulation instrument. The TiC particles are fine in the order of ~0.5 µm, with a uniform dispersion in aluminum. The study on un-lubricated sliding wear of the synthesized material revealed a wear mechanism that combines the characteristics of both adhesive and three-body abrasions.
Analysis on Anti-Crack Mechanism of High Elastic Asphalt Stress Absorption Interlayer
Authors: Yang Bin , Huang Qin Shou , Yuan Ding Ming , Huang Jin Hua
Published: July 2011

Based on the fracture mechanics, a finite element model of plane strain is employed to make a comparison analysis on the stress and strain field of reflective crack tip under the impacts of wheel load and thermal load of two different kinds of asphalt overlay—one overlay is set with stress absorption interlayer and the other is not. Results show that, under the impact of wheel load, the most unfavorable load position of reflective crack tip is 15cm of load center line away from the crack tip level. Under the effect of wheel load and thermal load, the stress and strain field of reflective crack tip has been greatly improved after setting the stress absorption interlayer and the stress intensity factor K and J-integral decrease obviously, which show that stress absorption interlayer plays a good role in anti-crack.
Experiment Layout of Space Laser Communication System Based on Adaptive Optical System
Authors: Wang Shu Fan , Wang Xiao Tian , Zou Xiang Yang , Wen Yong
Published: July 2011

Sixty-one unit adaptive optical system was used to analyze the influence of atmospheric turbulence on laser beam transmission in space laser communication system. From low earth orbit planet to ground station Laser communication system was estimated by means of optical design software. In addition, the compensation results, experimental phenomena and data based on adaptive optics were also analyzed in the paper.
Flotation Deinking of Xerographic and Laser-Printed Paper: Influence of Surface-Active Substances
Authors: Chandranupap Panitnad , Chandranupap Pravitra , Kongsat Pantharee
Published: July 2011

In present time, recycled paper from xerographic and laser-printed wastepaper plays an important role as alternatives to paper from virgin pulp because of their good pulp quality and high amount of wastepaper each year. This type of paper is classified as Mixed Office Wastepaper (MOW). The xerographic and laser-printed inks are usually called “toner” which its formulation is different from conventional ink. This work aimed to investigate paper recycling by flotation deinking process. The flotation experiments were conducted using SDS (sodium dodecyl sulfate) and Triton X-100 (C14H22O(C2H4O)n). The experimental results demonstrated that ink removal was more efficient with the use of non-ionic surfactant (Triton X-100) than anionic surfactant (SDS). The efficiency of ink removal was determined by ERIC and the pulp’s brightness. In addition, the quality of de-inked pulps was evaluated by pulp physical properties such as burst strength, tear strength and tensile strength.
Environmental Impact Assessment on Lifecycle of Sofa Material
Authors: Chou Ya Kuan , Chen Tien Li
Published: July 2011

According to the materials of casing, frame, and cushion, this research aims to investigate the environmental impact assessment of sofas. With reference to this characteristic, this assessment is based on the evaluation model “Eco-indicator 99” of Sima Pro and the results are listed as below: l Regarding sofa materials which are brought about the negative influence to the environment: Sofa casing: polyester fiber > leather > imitation leather > cotton; sofa frame: wood > plastic > metal; sofa cushion: TDI foam > MDI foam. l If we deal with sofa materials by chemical methods, respiratory inorganics are caused from a great quantity of fossil fuels during production and the huge negative influence will result in climate change. l Concerning the waste influence on the environment when sofas are end of life: Sofa casing: To incinerate or landfill polyester fiber is more seriously; sofa frame: To incinerate or landfill wood is more critically; sofa cushion: to incinerate TDI or MDI is more harmfully than to landfill or recycle them. l It will have positive help and decrease garbage if we can recycle sofa waste.
Research to Health Diagnose Model of Gate and Hoist Machinery Based on AHP
Authors: Yang Guang Ming , Jia Wen Bin
Published: July 2011

Safety evaluation index is a fundamental and key element in composing hydraulic metal structure healthy diagnostic model, however,the determination of weighting of Indexes is closely related to the reasonability and reliability of the whole evaluation result.Based on the safety level, importance and expertise of the main factors on hydraulic metal structure,we also combine integration of AHP method of nine marks and expert evaluation method to determine the weight coefficient of each index, the comprehensive health diagnosis of gates and hoists based on AHP method are first constructed in line with scientific and rational principles .And we use the model to achieve the specific project safety evaluation of hydraulic metal structures, also comparing it with the traditional comparative analysis, proving the comprehensive health diagnosis based on AHP model to be a more scientific, reasonable and reliable one.
The Factors of Pseudo Threshold Pressure Gradient
Authors: Zhu Zhi Qiang , Xiong Wei , Gao Shu Sheng
Published: July 2011

In this paper, we have finished seepage experiments of natural cores from two different areas. And analyzing the data from experiments, we got the curves of permeability and threshold pressure gradients. We found these curves existed good correlation in logarithmic coordinates. We also found that their threshold pressure gradients are different at the same permeability. Seeking the reason why they were different, we checked the experimental process and also tested natural cores form these two areas with the technology of constant speed mercury injection. We discovered that their micro pore structure of cores are different, which can explain the difference of the threshold pressure gradients. The smaller the pores and throats are, the greater the specific surface area is, the more greatly the fluid flowing were affected by boundary layer, the bigger the threshold pressure gradients are.
Modulation of Band Gaps of Codoping GaN: A First Principles Study
Authors: Wang Jing , Wang Ru Zhi , Xu Li Chun , Yan Hui
Published: July 2011

To improve the solar energy conversion of GaN for photocatalytic, the band gap of GaN should be tailored to match with visible light absorption, we calculated that Cr/C codoping effectively narrows the band gap of GaN by using first-principles calculations. Cr/C codoping can split the band gap with the formation of an intermediate band. Positive defect pair binding energy indicates that the defect pairs are stable with respect to the isolate impurity in the sample. The band gap narrowing can be optimized to shift light absorption into the peak of the visible spectral region , which enable maximal utilization of sunlight and thus offer immense potential for applications in solar energy conversion.