bluuebunny/crossref_metadata_2025 huggingface dataset:
Growth of Cadmium Sulphide Nanorods Using Chemical Bath Deposition Technique by Varying Cd/S Concentration
Authors: SHAH NITINKUMAR M
Published: February 2014

Cadmium sulfide (CdS) thin films were prepared using the chemical bath deposition method onto glass substrates at constant reaction temperature of 85 °C. Cadmium sulphate and thiourea were used as sources of Cd+2 and S-2 ions respectively. Films were prepared by varying cadmium concentration (viz. 1, 5 and 10 mM) keeping thiourea concentration constant (20 mM). These films were examined for their structural and surface morphologies by X-ray diffraction analysis (XRD) and atomic force microscopy (AFM). Analysis of results suggests that CdS nanorods grow with cadmium sulphate concentration of 10 mM. The optical properties were investigated using UVVIS spectrophotometer. The values of optical band gaps as-calculated from optical transmission measurements suggests that films have energy band gap in the range of 2.38-2.32eV decreases with increase of cadmium concentration.
Preparation of Poly(vinyl alcohol)/Polyoxalate Composite Nanofibers by Electrospinning and Drug Release Profiles
Authors: Phromviyo Nutthakritta , Swatsitang Ekaphan , Chompoosor Apiwat
Published: February 2014

This study investigated the use of a biodegradable polyoxalate blended with poly (vinyl alcohol) nanofibers to tailor properties of nanofibers and to control release of Rhodamine B from nanofibers. Nanofibers were prepared using an electrospinning technique. The morphology and average diameter of electrospun nanofibers were investigated using scanning electron microscopy. It was found that poly (vinyl alcohol) to polyoxalate ratio had a significant effect on the size of nanofibers (~175-403 nm). An in vitro release study showed that rate of Rhodamine B release increased with increasing poly (vinyl alcohol)/polyoxalate ratios yielding rate of release in the range of 0.1980.469 mg%/min. The mechanism of rhodamine B release can be explained by a two-stage process of diffusion and degradation. The results suggested that a water-insoluble polyoxalate could govern the rate of drug release. The ability to tune the release of chemicals from nanofibers has significant implications for controlled release of drugs.
Fabrication of ZnS Thin Film Buffer Layer in Solar Cell by Radio Frequency Sputtering Method
Authors: Chang Zue Chin , Lin Yi Chen , Chen Chih Yuan , Chen Chien Chon
Published: February 2014

The present study aims to investigate the influence of Coring glass substrate temperature on the topography, deposition rate, crystal structure, optical, and electrical properties of ZnS thin films produced by magnetic radio frequency sputtering method. From plain view SEM micrographs, the pebble structure has shown in all ZnS thin films deposited at various substrate temperatures. Through higher substrate temperature, smaller ZnS grains can be obtained in the present study. From XRD analysis, ZnS thin film exhibits hexagonal Wurtzite structure. When thickness of ZnS thin film arrive 300nm, optical transmission rate can be above 85% regardless of substrate temperature and gets optical energy barrier of 3.9 eV. From electrical measurement, the variation of resistivity with temperature exhibits a linear relationship for ZnS thin film.
Temperature-Dependent Current-Voltage Characteristics in ZnO Based Schottky Diodes
Authors: Kim Hog Young , Sohn Ahrum , Kim Dong Wook
Published: February 2014

Using currentvoltage (IV) measurements, the temperature-dependent current transport in Ag/Zn-polar ZnO Schottky diodes was investigated. Both the series and shunt resistances of the diode were altered at the different temperatures, which were related to the amount of free carriers and the formation of a vacuum-activated surface conduction path, respectively. The reverse biased current transport was associated with a thermally assisted tunneling field emission of carriers and the Poole-Frenkel effect, for higher and lower voltages, respectively. The average interface state density decreased with increasing temperature, which was due to a result of molecular restructuring and reordering and/or variation of the ideality factor with temperatures across the Ag/ZnO interface.
A Fiber Bragg Grating Temperature Sensor with High Pressure-Resistance Applied in Down-Hole
Authors: Ma Fei , Guo Fu , Zhou Huan , Wei Jun , Zhen Wei
Published: February 2014

A fiber Bragg grating (FBG) temperature sensor with high pressure applied in down-hole is experimentally studied. The relationship between the central wavelength and the temperature and pressure of the fiber Bragg grating is derived. The experimental results show that the packaged FBG temperature sensor has improved linearity and good repeatability. Its linearity is more than 0.999. The good linearity of temperature and wavelength is also kept in the high pressure when the compression and decompression were carried out under the pressure of 0-20 MPa and temperatures of 0-100 °C. Besides, the structure is simple. It can be widely applied in down-hole and other occasions
Growth and Characterization of ZnS Films by Chemical Bath Deposition
Authors: Mochihara Akiko , Yoshino Kenji
Published: February 2014

ZnS films are formed by chemical bath deposition using variety zinc sources such as zinc acetate (Zn (CH3COO)2), zinc sulfate (ZnSO4), zinc nitrate (Zn (NO3)2), iodide zinc (ZnI2), zinc chloride (ZnCl2) and zinc acetyl (Zn (acac)2). X-ray diffraction results show all broad spectra of ZnS. It is considered that amorphous ZnS can be grown. All samples show high transmittance. It is deduced that the decrease of transmittance around 3.7 eV is due to the ZnS band gap. Scanning electron microscopy shows that grain size becomes large with decreasing the instability constants of the zinc sources. It is assumed that zinc becomes ionization with decreasing the instability constants. All samples show a signal of O-H bond from fourier transform infrared spectra. It is assumed that the Zn (OH)2 exists in each sample.
Ultra Thin SiNX on a-Si In Situ Hot-Wire CVD by Decomposing NH3 Gas
Authors: Rai Dharmendra Kumar R. , Sutar Dayanand S. , Solanki Chetan Singh , Balasubramaniam K.R.
Published: February 2014

The fabrication of ultra thin silicon nitride (SiNX) layer (< 2 nm) on amorphous silicon (a-Si) in-situ hot-wire CVD by decomposing ammonia (NH3) gas is reported. Approximately 1.5 nm thin SiNX is formed by nitridation of 40 nm thick a-Si for 10 min at substrate temperature of 250 °C. The amorphous phase of SiNX formed on a-Si and a-Si layer deposited on c-Si wafer is identified by Raman spectroscopy. The formation of ultra thin SiNX by nitridation of a-Si at 250 °C is confirmed by X-ray photoelectron spectroscopy (XPS) depth profile measurement of SiNX/a-Si structured film. The report indicates that the HWCVD method can be used for fabricating superlattice structures consisting of ultra thin SiNX layers (< 2 nm).
Ultrasonic Test on Recycled Concrete: Relationship among Ultrasonic Waves Velocity, Compressive Strength and Elastic Modulus
Authors: Pani Luisa , Francesconi Lorena
Published: February 2014

In this paper an experimental program has been carried out in order to compare compressive strength fc and elastic static modulus Ec of recycled concrete with ultrasonic waves velocity Vp, to establish the possibility of employing nondestructive ultrasonic tests to qualify recycled concrete. 9 mix of concrete with different substitution percentage of recycled aggregates instead of natural ones and 27 cylindrical samples have been made.
At first ultrasonic tests have been carried out on cylindrical samples, later elastic static modulus Ec and compressive strength fc have been experimentally evaluated.
The dynamic elastic modulus Ed has been determined in function of ultrasonic wave velocity Vp; furthermore the correlations among Ed, Ec, fc e Vp have been determined.
It has been demonstrated that ultrasonic tests are suitable for evaluating different deformative and resisting concrete performances even when variations are small.
An Investigation on Effect of Oil Palm Shell Ash on Flexural Strength and Compressive Strength of Cement Mortar
Authors: Namdar Abdoullah , Yahaya Fadzil Mat , Jie Kok Jun , Ping Lim Yen
Published: February 2014

One of waste agriculture materials is oil palm shell ash. It has been producing in high quantity in palm oil mill, and for storage of that an investment requires. In this paper, an attempt has been made to analysis effect of oil palm shell ash on compressive and flexural strength of cement mortar. The compressive strength and flexural strength of cement mortar has been measured. To improve accuracy of work 50% cement and 50% fine sand has been proposed in cement mortar mix design. The results have been indicated that the effect of OPS ash on flexural and compressive strength of cement mortar is not same. The deflection, load sustainability and time to failure for compressive strength have independent fluctuation of flexural strength. The positive and negative effect of OPS ash on mechanical properties of cement mortar has been observed. The morphology of crack failure has not been investigated. The work can be continued with many waste agriculture materials. Keywords: waste agriculture, deflection, load sustainability, time to failure.
The Exploration of the Optimal Manufacturing Conditions of PE Modified Asphalt
Authors: Wang Song , Sun Jian Cheng
Published: February 2014

The waste PE modified asphalt is a material with high added value and technical content. It is a new and optimal material for road construction. By adding waste PE into asphalt to improve the asphalt’s performance [1], a longer use age of the road, a lower level of noises, and a more improved driving comfort and safety can all be achieved [2]. This paper mainly focuses on measuring the primary indexes of several modified asphalt samples produced under different conditions [3]. Based on the test data, a scientific analysis will be conducted to confirm the optimal manufacturing conditions, therefore transform the theory of PE modified asphalt into practice.
Effect of Seashell Powder on Flexural and Compressive Strength of Cement Mortar in Early Age
Authors: Namdar Abdoullah , Yahaya Fadzil Mat , Shan Chua Pei , Rajagopal Nabila Shahilla
Published: February 2014

The several structures have been failed due to low flexural and compressive strength of OPC paste. Many waste materials are applicable for modify flexural and compressive strength of cement mortar. Among the additives, a natural additive has been selected. The effect of seashell powder on flexural and compressive strength of cement mortar has been investigated. The result indicated that with replacement of 1% seashell, the deflection, time to failure and maximum load to failure of concrete beam has been improved. And the strain, time to failure and compressive modulus elasticity of cubic specimen has not considerably been changed. The more investigation on macro and micro property of OPC is necessary to obtain better results.
Fabrication of Homogeneously Dispersed Nanoneedle Manganese Dioxide/Graphene Composite for High-Performance Electrode Use in Supercapacitor
Authors: Kim Myeong Jin , Kim Ki Ho , Yoo Myeong Yeol , Kim Joo Heon
Published: February 2014

Two types of graphene/MnO2 composites were synthesized by different reaction procedures. R-GO/MnO2 was synthesized as follows: first, nanoneedle MnO2 was formed on the GO sheets using various functional groups (GO/MnO2). In the second stage, GO/MnO2 was reduced to graphene/MnO2 (R-GO/MnO2) via the dipping method. rGO/MnO2 was synthesized using a different reaction order: first, graphene oxide was reduced to graphene and nanoneedle MnO2 was formed on graphene sheets. Characterization indicated that the nanoneedle MnO2 structures in the R-GO/MnO2 composite were homogeneously dispersed on graphene sheets, whereas MnO2 in the rGO/MnO2 composite formed aggregates due to absence of functional groups. The R-GO/MnO2 electrode exhibited a specific capacitance as high as 327.5 Fg-1at 10 mVs-1, which was higher than that of the rGO/MnO2 electrode (229.9 Fg-1). It is anticipated that the formation of nanoneedle MnO2 on the GO surface following the reduction procedure could be a promising fabrication method for supercapacitor electrodes.
The Preparation of Modified ZSM - 35 and its Catalysis Effect Analysis on N-Butene Isomerization
Authors: Hu Yun Feng , Yang Bo , Hu Lin Jie , Liu Li Jie
Published: February 2014

In order to study the effect that the modified ZSM - 35 as a catalyst brings to n-butene isomerization catalysis. In this paper, by considering the performance analysis brought by different silica alumina ratio, reaction temperature, concentration of nitrogen and macro porous silica gel embellish acting on butene isomerization reaction of modified ZSM - 35 molecular sieve catalyst , Al2O3 samples being "15" shows better performance; Adding appropriate amount of silicon carbide catalyst or modified silicone can further improve the selectivity of butene; Nitrogen dilution has certain help in improving butene isomerization reaction performance.
The Conductive of Composites Made from Polypyrrole and PBA-g-PMMA-GMA
Authors: Zhou Shi Biao , Huang Xiao Bing , Xiao An Guo , Chen Zhen Gan , Chen Yuan Dao , Xing Zhi Fu
Published: February 2014

A novel PPy/PBA-g-PMMA-GMA (copolymer) composites were prepared and the preparation conditions, characterization and properties of the composites were investigated. The results indicate that the oxidant types, molar ratio of oxidant/monomer, polymerization time, PPy content affect greatly the conductivity of the PPy/terpolymer composites. The ultimate elongation of composites decreases with increasing PPy content,while high PPMM content brings forth high tensile strength.
Nucleation Mechanism of IGF in the HAZs of Ti-Killed HSLA Steel
Authors: Duan Dong Ming , Tang Meng Xia , Wu Run , Bu Yong , Chen Xiao
Published: February 2014

The weldability of the steel can be improved by formation of intra-granular ferrite (IGF) in heat affected zones (HAZs) on the edge of weld bead. The nucleation mechanism of IGF of Ti-killed high strength low alloyed (HSLA) steel has already been investigated with the aid of transmission electron microscope. Titanium oxides (Ti2O3) particles with the diameter of 0.4μm and Si-rich complex inclusions (Ti3O5+MnS) with that of 0.5μm can serve as the nuclei of IGF. The nucleation mechanism of IGF is proposed as follows: (1) inclusions are inert substrate. (2) The depletion of the austenite former Mn local to the inclusion increases the thermodynamic driving force of γα for transformation. (3) Lattice matching between inclusion and ferrite reduces the interfacial energy of opposing nucleation.
Influence of Overlapping Ratio on Microstructure and Mechanical Properties of Hardened Layer
Authors: Wang Rong , Liao Chun Hua , Wei De Qiang
Published: February 2014

The large area of electron beam transformation hardening is achieved by means of muti-channel scanning electron beam. Then the microstructure and properties of the hardening layer was discussed and analyzed. Scanning electron microscopy (SEM), EDAX energy dispersive spectroscopy (EDS) and other analytical testing methods are used to analyze the microstructure and phase composition of the hardened layer. Light-section microscope is used to measure the surface roughness. The result shows that the tempered microstructures of 45 steel are tempered martensite, tempered troostite and tempered sorbite after electron beam scanning. The hardness of the hardened layer is between 750 HV and 900HV which is about twice or three times as hard as the matrixs. The hardness of the tempered zones is between 424HV and 426HV which is a third of the matrixs; the surface roughness is nonlinearly declined with the increase of the overlapping ratio.
Fabrication of Hexagonal Ni Micro/Nano Plates by a Facile Hydrothermal Reduction Route
Authors: Zhang Jun , Yao Hai Rui , Li Hua Bo , Li Jing Jing , Bai Xiao Kang
Published: February 2014

Hexagonal Ni micro/nanoplates were successfully prepared via a facile hydrothermal route using the polyvinylpyrrolidone as structure-directing agent. It has been verified from x-ray powder diffraction and transmission electronic microscopy that as-prepared products with high purity and fine dispersity belong to face-centered cubic microstructure of nickel metal. The magnetic hysteresis loop of the hexagonal Ni micro/nanoplates exhibits the ferromagnetic characteristics, and its coercivity increases by 25 % in comparison with the bulk nickel materials. The possible mechanism of the formation of hexagonal micro/nanoplates was suggested.
Study on the Corrosion Resistance of Slag α-Sialon Ceramics to NaOH and HNO3
Authors: Cheng Qing Tao , Wang Yun , Xu Dong Dong , Jiang Jiu Xin
Published: February 2014

The corrosion resistance of slag α-Sialon ceramics, preparedviapressure-less sintering and hot-pressing from slag α-Sialon powder, to NaOH and HNO3was studied in this work. The result shows that slag α-Sialon ceramics have exellent corrosion resistance to NaOH and good resistance to HNO3. The corrosion mechanism and corrosion mode of acid and alkali to slag α-Sialon ceramics was investigated by means of scanning electron microscopy (SEM), and the results indicate that the corrosion of acid and alkali to hot-pressing ceramic is the slow surface corrosion, not only on the crystal grains, but also on the grain boundary phase, while the fast pitting is the dominant corrosion mode for pressure-less ceramic. The corrosion of NaOH solution to ceramics mainly occurred the grain boundary phase, while not only the grain boundary phase, but also crystal phase are corroded by HNO3.
Influence of Ultrasonic Vibration on Grain Refinement of Pure Aluminum
Authors: Li Chun , Li Da , Ren Yan Ping , Qin Jia Meng
Published: February 2014

In this paper, samples were prepared by power ultrasonic on molten Al ingot. The results show that microstructure of the samples treated by untrosonic vibration is more finer than that of the untreated ones, the ultrasonic treatment time is not the longer the better. When the vibration head dipped into the middle of the melton, the better grain refinement effect can be gotten. Too deep or too shallow of the vibration head dipped in, vibration effect just limited to near the head, the influence is relatively small when the melton far away from the vibration head.
Study on the Flange Spread of H-Beam
Authors: Ma Jin Hong , Yao Xiao Han , Tao Bin
Published: February 2014

According to the production data of a rolling H-beam factory, the FE model of hot continuous rolling process of H-beam is built. The rolling process of H-beams is simulated by explicit dynamic FEM, and the influence of deformation parameters on the spread of rolling piece is analyzed. The simulation results show that the flange width, elongation ratio between flange and web and flange thickness are the major influencing factors on the spread of rolling piece.
Multi-Objective Optimal Design Roller of Y-Type Mill Using Ga Combined with FEM
Authors: Ma Jin Hong , Tao Bin , Yao Xiao Han
Published: February 2014

Y-Type rolling mill with three roller is a new kind of wire mill. Because of its unique advantage, It is very important to optimize structure. Roller is important part of the rolling mill, whose size effects the strength, stiffness, as well as the rolling piece quality and service life of the rolling mill. Therefore, It is important to optimize the roller structure dimension of Y-type mill.A new structure optimizing method is set up combined the modified genetic algorithms with finite element method.This method can solve multi-objective problems with more complex constraints in the engineering. Compared with the zero order method and first order method companied with ANSYS, the result of this optimizing method is better. This method can solve multi-objective problems with more complex constraints in the engineering, providing a new and effective means for the engineering problems.
FEM Research on the Residual Stress of Corrugated Waist Rail in Hot Rolling
Authors: Ma Jin Hong , Tao Bin , Yao Xiao Han
Published: February 2014

The rolling process of corrugated waist rail is simulated by explicit dynamic FEM module ANSYS/LS-DYNA. The distribution of residual stress of the rolled piece after rolling is analyzed, The influence of rolling velocity, the reduction ratio, and rolling temperature on the residual stress are analyzed. According to the result of simulation, it is helpful to the actual production.
The Profile Curve of Tooth-Shaped Roller Influence on the Rolling Force of Corrugated Web Rail
Authors: Ma Jin Hong , Yao Xiao Han , Tao Bin
Published: February 2014

The corrugated web rail is a special kind of rail structure. Horizontal roller of rolling the corrugated web rail is named as tooth-shaped roller because its shape is close to straight tooth gear. The profile curve of tooth-shaped roller has great influence on the finish product quality , the rolling process and the rolling force of the corrugated web. In this paper, profile curve of tooth-shaped roller of rolling corrugated web rail was designed. FEM model of rolling corrugated web rail was established and the rolling process was simulated by the software ANSYS/LS-DYNA. In the condition of the same reduction and the same rolling speed, the rolling force was compared of experiment profile curve with the designed profile curve. According to the analysis results, the rolling force of the designed profile curve is significantly smaller than that of experimental profile curve. Therefore, it is necessary to optimize profile curve of the tooth-shaped roller to decrease the rolling force.
Cutting Parameters Effects on Cutting Properties Based on Cutting Temperatures
Authors: Fan Ning , Fu Xiu Li , Guo Pei Quan
Published: February 2014

Cutting temperature is an important factor for nylon cutting properties. The glass transition temperature is suitable to determine cutting conditions. By applying finite element method to this research, the cutting temperatures variation on workpiece and chip with time under different cutting parameters are calculated. It is proved that cutting temperature on workpiece surface is higher than that on chip and decreases quickly. The cutting parameters have great effects on workpiece cutting temperature. The cutting temperatures increase with cutting parameters increase. In addition, the cutting feed has the most effects on cutting temperature.
The Conjecture of Obtain C4H5O+ Fragments by Cyclicketone Ion Excited State
Authors: Chen Hong Bin , Zhu Ying , Wu Jie
Published: February 2014

Our theoretical study aims to the way of obtain C4H5O+ fragments laser-induced by cyclicketone ion (C7H12O+) excited state, using the CIS(Configuration Interaction with Single Substitute) method, and gives out a result with proved and directed significance for the corresponding experiments.
Elastin-Like Polypeptides as Thermosensitive Polymer System
Authors: Tang Xin
Published: February 2014

Thermo-responsive elastin-like polypeptides (ELPs) were successfully obtained by inverse transition cycling (ITC) and recursive directional ligation (RDL). Six ELPs displayed thermal properties, depending on their sequence and chain length. It was found that the ELP[KV8F-4 and ELP[KV8F-8 were effective as thermosensitive materials at the body temperature with phase transition temperature from 35 to 45oC.
Local Delivery System Using Thermosensitive Hydrogel and Drug Loading Microspheres for Cartilage Repairing
Authors: Wang Lei , Wu Gang
Published: February 2014

A local drug delivery system constituted by hybrid microsphere/thermosensitive hydrogel was fabricated for Osteoarthritis (OA) therapy in the research. The hydrogel were synthesized by ring-opening copolymerization. Microsphere was fabricated by O/W emulsion and solution evaporation method. The properties of the products were characterized by 1HNMR, FTIR and phase transition diagram. The microsphere/hydrogel was prepared for in vitro drug release research. The results showed microsphere/hydrogel hybrid system can alleviate initial burst release. After 650 hours, only 60 percent of the drugs were released. Kinetics research implied the drug release is controlled by diffusion/erosion mechanism.
Fabrication and Characterization of P34HB Scaffolds with Oriented Microtubules
Authors: Wang Xin Hui , Sang Lin , Wei Zhi Yong , Zhai Li Jie , Qi Min
Published: February 2014

Sponge-like scaffold with a specific three-dimensional structure resembling the actual extracellular matrix of a particular tissue show significant potential for the regeneration and repair of damaged anisotropic tissues. In this research, an oriented microtubular P34HB scaffold was prepared successfully. The mechanical property showed that anisotropy of modulus is much greater than a typical non-oriented scaffold. Altering the P34HB concentration allowed P34HB scaffolds to be produced with complex pore orientations, and anisotropy in pore size and alignment.
Preparation and Characterization of Porous PLGA Scaffold for Tissue Engineering
Authors: Wang Xue Jun , Lou Tao , Yang Zhen , He Kun Peng
Published: February 2014

Scaffold plays an important role in tissue engineering. In this study, porous PLGA scaffold was successfully prepared by mixed solvent systems using the thermally induced phase separation method. The PLGA scaffold shows fibrous matrix and interconnective pores, and the scaffold has high porosity and compressive modulus with dioxane/THF solvent system, which could be a very promising scaffold for tissue engineering.
Effects of Annealing on Properties of (Na,Mg):ZnO Thin Films Deposited by Sol-Gel Method
Authors: Zhang Cai Zhen , Chen Yong Gang , Liu Su
Published: February 2014

Na/Mg co-doped (Na,Mg):ZnO films were fabricated on pyrex glass substrates by sol-gel spin-coating method. Effects of annealing on properties of the films were particularly investigated using X-ray diffraction (XRD), scanning electron microscopy (SEM) and transmittance spectra. The internal stress of the films annealed at different temperature was calculated. Experimental and analytical results show that some NaCl freeze-out derivatives will appear on films when the annealing temperature is too low, with the increasing annealing temperature, the c-axis tensile stress is sharply decreased first, then the c-axis stress was changed into press stress and its value is increased continuously, so the structural, surface and the optical properties of the films improve first and deteriorate afterwards.
Hysteretic Behavior Analysis of Stiffing Steel Plate Deep Beam
Authors: Pan Tian Jiu , Qiu Ya Bo , Zheng Hong , Zhao Ran
Published: February 2014

Stiffing steel plate deep beam is introduced as a new lateral force resistant structure system and put forward mechanism of stiffing steel plate deep beam. Mechanical property of stiffing steel plate deep beam with different span-depth ratio under horizontal low cyclic load is analyzed through ANSYS which is a software of finite element analysis. The results indicates that with decreasing of span-depth ratio ultimate load raised substantially and strength of component gradually changes from depending on bending to shearing. The optimal value of span-depth ratio is 1.5.
The Performance Evaluation of Modified Asphalt by Polyphosphoric Acid and SBS
Authors: Wu Yao Dong
Published: February 2014

The paper evaluate asphalt modified effects by PPA.The relationship of performance is compared between SBS modified asphalt and modified asphalt with different proportion SBS and different proportion PPA by tests such as the Penetration, Softening point, Ductility, viscosity and performance index of after aging RTFOT and after aging PAV. Results showed that 4%SBS and 1.5% PPA modified asphalt binder provided road performance as well as 5%SBS only binder. It is remarkable effect for improving road performance of PPA modified asphalt on high temperature, anti-aging, storage stability.
LEFM Analysis of V-Notched Aluminum Plates Using Higher-Order Layerwise Model
Authors: Woo Kwang Sung , Kwon Yoo Mi , Lee Dong Woo , Kim Hee Joong
Published: February 2014

Higher-order layerwise model is proposed to determine stress intensity factors using virtual crack closure technique for V-notched plates. Present method is based on p-convergent approach and adopts the concept of subparametric element. In assumed displacement field, strain-displacement relations and 3-D constitutive equations of a layer are obtained by combination of 2-D and 1-D higher-order shape functions. Thus, it allows independent implementation of p-refinement for in-plane and transversal displacements. In the proposed elements, the integrals of Legendre polynomials and Gauss-Lobatto technique are employed to interpolate displacement fields and to implement numerical quadrature, respectively.
Analysis of Plastic and Steel Sleeve Contact Force on ANSYS
Authors: Wang Fang , Li Zheng Ji
Published: February 2014

Plastic and steel sleeve contact force distribution, widely used in oil drilling mechanics, syringes, aerospace and so on. In this paper, plastic and steel ANSYS simulation compression sleeve contact deformation and contact force distribution state. Provide a valuable reference for the study of contact force fields Introduction.
Analyzing Remaining Life Non-Probability Reliability and Parameter Sensitivity for Pipeline Subjected to Corrosion
Authors: He Xin Dang , Gou Wen Xuan , Gao Zong Zhan , Li Yao , Gao Fei
Published: February 2014

This paper aims to study the problem of residual life prediction and non-probabilistic reliability analysis for pipeline subjected to corrosion. Based on corrosion pipe bursting equation, the remaining life non-probabilistic reliability analysis model of corrosion pipeline with interval variables was established. The sequential quadratic programming method has been used for solving the non-probabilistic reliability index of corrosion pipes under different service years. Then the relationship curve of the service life and the remaining life reliability of the pipeline corrosion were given. Using the finite difference method, the parameters sensitivity analysis of corrosion piping reliability was performed.
Analytic Study of Structural Stability for H-Section Column Made of Submarine Structural Steels Based on Boundary Conditions and Column Lengths at High Temperature
Authors: Kwon In Kyu
Published: February 2014

Structural steels require performance, such as structural performance, constructional one, and fire performance as an efficient constructional material. However, structural steels have a fundamental weakness in a fire and need to improve constructional performance of welding which resulted in the development submarine structural steels, such as SM 400, SM 490, and SM 520. Their yield strengths are the same as general structural steels, but the weldability was better. Therefore, the application of submarine structural steels increases in steel building market annually. However, the fire resistance performance isnt determined when these are used as main materials in H-section columns in the case of different boundary conditions and different column lengths. In this paper, to confirm and suggest a new guideline for fire protective materials, an advanced engineering design was used with mechanical properties at high temperature and a heat stress analysis. The findings showed that fire resistance of H-section columns with longer lengths and other boundary conditions are determined to satisfy the fire resistance performance if the fire protective materials derived from 3500mm in length and hinge to hinge boundary condition apply to longer column lengths and other boundary conditions.
Microstructural and Microanalytical Study on Cementitious Materials Subjected to the Cyclic Sulfate Environment
Authors: Yuan Xiao Lu
Published: February 2014

Microstructural properties have been studied in cementitious materials, which were subjected to cyclic sulfate exposure, through x-ray diffraction (XRD), scanning electron microscope (SEM), energy dispersive spectroscopy (EDS) and mercury intrusion porosimetry (MIP). Results indicate that portlandite in OPC concrete and OPC-FA concrete is mainly converted to gypsum. Portlandite in OPC-GBFS concrete is mainly converted to gypsum and ettringite. Concrete subjected to the cyclic sulfate attack has a lower porosity and the higher amount of macro-pores than that before exposure. Concretes incorporating FA or GBFS had lower porosity and higher amount of micro-pores than OPC concrete.
Chloride Ion Diffusion Coefficient of HPFRCC after Loading
Authors: Shin Kyung Joon
Published: February 2014

Various methods have been used to reinforce cementitious material such as mortar and concrete that have weak tensile strength. Fiber Reinforced Concrete is one of the reinforcing methods that mixes a matrix with fibers that have strong tensile strength. Recently, High Performance Fiber Reinforced Cementitious Composites (HPFRCC) have been developed. HPFRCC provides a possible solution to this inherent problem of cracking by smearing one or several dominant cracks into many distributed microcracks. The present study explores the ductility characteristics of HPFRCC by measuring chloride diffusion coefficients after load is applied.
Research on Factors Affecting Reinforced Concrete Durability
Authors: Chong Fu Yuan , An Ya Nan , Wang Peng
Published: February 2014

Reinforced concrete is widely used in building structures. However, due to its corrosion, deterioration loss is more and more outstanding. Therefore, besides building material mechanical properties and the cost, the structural designer also need to focus on the durability of reinforced concrete. Effects of reinforced concrete durability factors mainly include corrosion of steel in reinforced concrete, freeze-thaw cycle, soft water, high temperature and chemical erosion. Understanding the influencing factors will help control the concrete deterioration, reduce the structural reparation and maintenance costs, and thereby reduce the life cycle cost of structure.
Theory and Practice on Non-Artificial Drainage of CBM High-Yielding Well
Authors: Han Bao Shan
Published: February 2014

The principle of the non-artificial drainage of CBM wells is studied in this paper. Through theoretical research and engineering test analysis, it points out that to control casing pressure is the key means to realize the non-artificial drainage of CBM wells, and the physical model and mathematical model of the non-artificial drainage theory of CBM wells are established. The established theoretical model was validated in a group of horizontal well production in Jincheng mining area. The process of test practice showed that the horizontal well obtained the outstanding gas-yielding effects. The study results of this paper can provide the important technical support for CBM production wells to achieve high and stable yield, and have the greater application value.
Conflict Resolution Strategy on Parameters Optimization in BTA Deep-Hole Processing
Authors: Zhao Wu , Sun Chao Fan , Hu Zhan Qi
Published: February 2014

Conflict resolution is proposed for BTA boring based on optimization algorithm in this paper, which is capable of finding the bottleneck of value assignment by taking advantages of redundant extensibility in the range of constraint parameters. It can realize the optimum precision index of manufactured component with the minimal loss parameter interval, which is through establishing the relaxation model for parameter range optimization considering strategy of conflict resolution. The potential conflict in technical plan can be detected at the beginning of parameter selection accompanied with the constraint consistency algorithm. The conflict resolution strategy can implement effectively for the range of quantitative parameters. The bottleneck restricting the values can be found by taking the advantages of the redundant expandability of constraint parameters ranges, to realize the optimum processing precision index for components at the lowest loss of parameters ranges. At last, the calculation case verifies the effectiveness of the research methods.
The Research on SO2 Desorption Equilibrium Mechanism of Sodium Alkali Desulfurization Regeneration Solution
Authors: Xu Hui
Published: February 2014

Sodium alkali flue gas desulfurization (FGD) is one of the most promising renewable FGD technologies, and the SO2 gases desorption in desulfurization regeneration solution is very important to directly affect its application. Based on the gas-liquid equilibrium relationships, this paper researched the equilibrium mechanism of SO2 desorption in the sodium alkali desulfurization regeneration solution. The results showed that SO2 desorption process is a mass transfer process that SO2 transfer from liquid phase to gas phase essentially, and SO2 desorption limit capacity depend mainly on the gas-liquid equilibrium relationship. Moreover, the formula of SO2 desorption limit capacity at equilibrium condition was deduced through analyzing desorption equilibrium relationships, and the main factors are also discussed.
Evaluation of Environmental Pollution from Asphalt Recycling Technology
Authors: Zhou Chuan Lin , Zheng Chao Cheng , Cheng Dong Xiang
Published: February 2014

A higher demand on application of asphalt recycling technology was required on accompany with the re-utilization problems in the road maintenance. Recent years have witnessed serious environmental pollution problems, including high toxicity, complex components, as the key and most difficult issue in environmental detection and comprehensive improvement field. Therefore, components of asphalt in air and water resulted from asphalt recycling technology were assessed comprehensively to illustrate the significant factor in pollution and to clarify application value of inhibitory material in pollution control.
The Power Smoothing Control of PMSG Based on Superconducting Magnetic Energy Storage
Authors: Ma An Ren , Huang Yong Jun
Published: February 2014

In the traditional control of permanent-magnet synchronous generator (PMSG), when the speed of the wind changes quickly, the power and the voltage of the generator will vibrate. In this paper, superconducting magnetic energy system (SMES) is used to realize the smoothing control of power and voltage of generator. The feasibility and correctness of the control strategy are verified by MATLAB simulation.
The Design of Numerical Control all Attitude Integrated Gyro Test Turntable
Authors: Wang Qi , Yang Fan , Nong Xie , Huang Yun Ming
Published: February 2014

This paper introduces the design points of the numerical control all attitude combined gyroscope test turntable. This Test table includes the course and pose angle given system, heading and attitude angle testing system and three weeks of servo system Heading and attitude angle of a given system using ZAZ1413 angle digital conversion module. Heading and attitude angle measurement system using SZZ1413 angle conversion module.
PSO in Two-Wheeled Self-Balancing Robot Control Research
Authors: Jian Fang , Liu Jun Yi
Published: February 2014

Two self-balancing robot is a nonlinear, multivariable, intrinsically unstable motion control system, For traditional LQR controller feedback matrix optimization problem is difficult to determine, Particle swarm optimization algorithm to optimize the LQR controller feedback matrix, The simulation results show, Utilizing particle swarm optimized LQR controller improves the stability of the system, reducing the system overshoot and oscillation frequency.
Research on Transmission Mechanism and Dynamic Regulation Mechanism for Quadruped Search Robot
Authors: Wang Peng , Zhang Yuan , Li Ji Xiang
Published: February 2014

Aiming at completing search task under disaster condition problems, the structure scheme of transmission mechanism and dynamic regulation mechanism were designed. Firstly, the structure scheme of transmission mechanism includes drive unit, worm gearbox unit and the bearing unit; secondly, the structure scheme of dynamic regulation mechanism includes movement allocation unit, sequential adjustment unit and dynamic balance unit. Whats more, the movement simulation of quadruped search robot was carried out with the Pro/E platform. The experimental result shows that the quadruped search robot can achieve stable movement, and then it verifies reliability of the robot design.
The Control Strategy Study on Combined Mechanical and Electrical Braking of 8 x 8 Vehicles Driven by Wheel Hub Motor
Authors: Yan Yu Lin , Li Jia Qi , Liao Zi Li , Liu Chun Guang
Published: February 2014

In order to recycle part of the brake energy in the driving hub motor of the 8X8 electric vehicles. And the energy utilization rate of electric drive vehicles should be increased, the wear of mechanical brake system should be reduced. A fuzzy control method is established for mechanical and electrical joint brake. It can be used to establish a principle of the distribution of brake. Through the simulation on MATLAB platform, it shows that this control method is efficient in improvement of brake ability, distribution of brake distribution, and the energy recycling.
A Study on Indoor Environment Monitoring System via WSN
Authors: Chen Zhi Chao , Chen Fu Yang , Jiang Bin
Published: February 2014

The quality of indoor environment has close relationship with peoples health, while people spend most time indoor during their life time. The development of relative technologies gives us a chance to monitor and change the indoor environment conveniently, such as sensor technology, computer technology and wireless communication technology. WSN (Wireless Sensor Network) has been widely used in many areas and especially in environment monitoring applications. This paper proposes a monitoring system applied in indoor environment which can provide an access to four kinds of parameters, including temperature, humidity, formaldehyde concentration and light intensity. The system is an application of WSN based on TinyOS. The system presented in this thesis is comprised of an upper PC, a sink node and a few sensor nodes. In addition, a monitoring platform with friendly human-machine interface is designed on the upper PC. The result of system test shows that this system can monitor the environmental parameters indoor sequentially and reliably.
Design of High-Precision Measuring and Control System for Refrigerant with MSP430
Authors: Gao Zheng Zhong , Wang Ya Ping , Liu Long Ji , Liu Li Qiang , Li Yao
Published: February 2014

According to the practical requirements of filling refrigerants of refrigeration maintenance industries, an high-precision measuring and control system for refrigerant with MSP430 is designed in this paper. High-precision weighing sensor and high-performance amplifier are adopted in the hardware structure, and an improved amplitude-limiting and shake-disappearing filtering algorithm is used in the software data processing. The design is capable of not only achieving the purification and recycling of refrigerant effluent, but also conducting the functions of pressing, vacuumizing and leaking hunting of both high and low pressure. The actual results in the practical refrigeration maintenance industry show that this measuring and control system precision can reach0.5, which is reliable in operation, good in stability and capable of solving the problem that the discharge of waste refrigerant may pollute the environment.
Remote Monitoring System of the Rivers and Lakes' Water Quality Based on GPRS and 3G Technology
Authors: An Meng Xia , Xu Ji Ping , Wang Xiao Yi , Yu Jia Bin , Zhang Hui Yan , Shao Fei , Yang Bin
Published: February 2014

In view of the methods on remote monitoring of the rivers and lakes water quality are relatively single and low efficiency in supervision at present, this page puts forward a kind of design method of the internet of things system about remote monitoring system based on GPRS/3G technology. The system can realize multi-point data integration, processing, integration and real-time results releasing, with GPRS/3G remote data communication technology as the core, and send the information accesses to the buoys placed on the waters surface, mobile intelligent instruments, and the water quality monitoring ark placed on the water bank via GPRS/3G module to the superior intelligence analysis system, which realizes the real-time display in the GIS map, water quality evaluation, bloom forecast, decision-making, etc. Practice has proved that this system is stable and reliable, and provided the effective monitoring of the rivers and lakes water quality and management decision of algae blooms emergency for the environmental protection department.
A Fault Tolerant Control for Networked Control System with Continuous Fault Estimation
Authors: Liu Jing , Zhao Yi Xin , Yang Zhi , Wu Xiao Jun
Published: February 2014

In this paper, controlled plant with random fault in real-time operation is discussed. In order to ensure the continuous stability of the system and asymptotic convergence, a new fault tolerant control (FTC) of networked control system (NCS) with fault state feedback is designed by extended state observer (ESO). This scheme of FTC owns the ability to continuously track the uncertainty faults and unknown inputs. Experiment results verify the effectiveness of this method.
A Research on Automatic Detection Device for the Missing of the Roller Chain's Rollers and Sleeves
Authors: Huang Yi Lei , Wang Guang Xun , He Han Chao , Zhang Jing
Published: February 2014

The set of automatic detection device for the parts missing of the roller chains rollers and sleeves is based on the displacement transfer theory of the lever mechanism and combined with the integration of PLC control. The levers one end is the detection head close to the roller chain and the other end is the induction head, its support is placed on the base. Sensor puts the induction information into the PLC, and then the PLC make the Synthetic judgment to control the chains drive mechanism to slow down and marking on the places that have missing some parts on time. Its a device has high reliability and high efficiency, which can realize auto-running to replace manual check perfectly.
Study on the Angle Measurement of Laser Shaft Alignment Instrument
Authors: Lang Yao , Zheng Dan , Lv Xiu Yan
Published: February 2014

Laser shaft alignment instrument needs to know the angle which is rotated by the axis of measurement point at each time. It adopted the accelerometer ADXL203 to measure angle and put its two sensing axis in the vertical plane, and then calculated its outputs. It makes the conversion formula of inclination and acceleration better to improve the measurement accuracy, and the measurement range achieves 360 °. Finally, the measurement data dealt with mathematics are displayed by LabVIEW, and it friendly achieves the man-machine interactive function.
Research on the Topology and Control Policy of Composite Energy Feedback Cascaded Multi-Level Inverter
Authors: Wang Pan , Guo Xi , Yu Jian Hua , Liu Fei , Zha Xiao Ming
Published: February 2014

Traditional uncontrolled or phase controlled cascade multilevel inverter only can realize one-direction transmission of energy. This paper presents a complex energy feedback cascade inverter topology with full-controlled, phase controlled Power units and its control strategy. For the full-controlled units, use PWM converter to replace the traditional rectifier bridge, and then combine with H-bridge inverter, the two-direction inverter is realized. The others remain phase controlled structure. According to the pump-up voltage in the energy feedback process ,a new method using the output side DC voltage closed loop control is proposed to prevent DC voltage shock and make all energy feedback to grid .Then it was verified in a cascade inverter with five units in which only three units are full-controlled. This inverter has the merits that it can automatic realize two-way flow of energy, the input currents approximate sine, the DC voltages control stability, the output voltage waveform is good and the phase shifting transformer structure is also simplified, etc. Simulation showed its feasibility and effectiveness.