bluuebunny/crossref_metadata_2025 huggingface dataset:
MnxZn1-xO Crystal Synthesized by Hydrothermal Method
Authors: Zheng Wen Li , Wang Su Xin , Li Zhi Wen
Published: December 2011

MnxZn1-XO Crystal was synthesized by hydrothermal method in this work.The experimental parameters for hydrothermal synyhesis were:Mineralizer concentration 3mol•L-1KOH, the fill factor 35%, temperature 430°C, Zn(OH)2 doped with MnO2 as precursor, and the reaction time 24 hours. The Mn concentration in crystal was determined by X-ray EDS. The atomic percentage of Mn in crystal increases as the concentration of MnO2 in precursor increased. The maximum atomic percentage for Mn is over 2%. The morphology shows characteristics of hexagonal prism of pure ZnO crystal. The exposed faces are hexagonal faces m｛10 0｝, hexagonal cone faces p｛10 1｝, negative polar faces ｛000 ｝and positive polar faces｛0001}. The diameters of the crystals are 50-200μm，the heights are 20-100μm.
Purification of Metallurgical Grade Silicon by Slag and Acid Leaching Treatment
Authors: He Fa Lin , Ren Xian Pei , Cheng Hao Ran , Chen Chao
Published: December 2011

There are many methods of refining of metallurgical grade silicon (MG-Si). In this paper, the purification of MG-Si by slag and acid leaching treatment respectively is investigated. It is found that the main metallic impurities in MG-Si, such as Fe、Al、Ca、Ni、Ti，and nonmetallic elements, such as P、B, precipitated in Si-Ca phase, which is dissolved by acid easily. The influence of different ratio of slag/silicon upon removal rate of boron also be researched As well as, the effect of the cooling speed of the molten silicon on removal of P by acid treatment is researched and it indicated that the slower of cooling speed, the best effect removal of P is up to,There are many methods of refining of metallurgical grade silicon (MG-Si). In this paper, the purification of MG-Si by slag and acid leaching treatment respectively is investigated. It is found that the main metallic impurities in MG-Si, such as Fe、Al、Ca、Ni、Ti，and nonmetallic elements, such as P、B, precipitated in Si-Ca phase, which is dissolved by acid easily. The influence of different ratio of slag/silicon upon removal rate of boron also be researched As well as, the effect of the cooling speed of the molten silicon on removal of P by acid treatment is researched and it indicated that the slower of cooling speed, the best effect removal of P is up to
Effects of Annealing Technique on the Microstructure and Mechanical Properties of AZ31B Magnesium Alloy Sheets
Authors: Liu Hua Qiang , Mi Zhen Li , Tang Di , Wei Song Bo
Published: December 2011

The effects of different annealing technique on the static recrystallization, microstructure, mechanical properties and fraction mechanism of AZ31B magnesium alloy sheets are investigated. High toughness and high formability of AZ31B magnesium alloy sheets are achieved by researching how to optimize annealing technique to improve the microstructure and mechanical properties. The results show that better matching of strength and toughness are obtained, and the sheets have synthetically excellent mechanical properties when adopting the annealing temperature at the range of 320°C to 380°C, and the annealing time is near to one hour.
The Feasibility Analysis of Ice Making System Driven by Liquid Nitrogen Engines and Heat Source is Diesel Exhaust
Authors: Yuan Guang Jie , Miao Xiao Nan
Published: December 2011

Based on the liquid nitrogen type lang Ken cycle and refrigeration circulation to analyse Ice Making system Driven by liquid nitrogen engines and Heat source is Diesel exhaust. Puts forward the evaluation method of diesel exhaust waste heat utilization efficiency, The simulation results of Matlab show that this system has Practical value, can be used in the Small and medium fishing boat.
Non-hydrogen Catalytic Dewaxing for Oil Production
Authors: Li Jie , Xiong Lian , Ding Fei , Zhang Hai Rong , Chen Xin De
Published: December 2011

Waste plastics can be converted to diesel oil and lube base oil by thermal pyrolysis and dewaxing. ZEM-5, H-ZEM-5, Fe/H-ZEM-5 and Co/H-ZEM-5 catalyst were prepared. The influences of additive metals and type of molecular sieves on catalyst were discussed. The results showed that the additon of metallic components enhances the activity of catalyst, produces the low pour point diesel oil, and greatly reduces the pour point of lube base oil. The catalyst impregnated with Fe was more effective than one impregnated with Co. The qualities of oil production were also improved more with H-ZEM-5 than ZEM-5.
Exact Traveling Wave Solutions to a Model for Solid-Solid Phase Transitions Driven by Configurational Forces
Authors: Guo Chang Hong , Liu Xiang Dong , Fang Shao Mei
Published: December 2011

This paper studies the exact traveling wave solutions to a model for solid-solid phase transitions driven by configurational forces. The model consists of the partial differential equations of linear elasticity coupled to a quasilinear nonuniformly parabolic equation of second order, which describes the diffusionless phase transitions of solid materials. By using the hyperbolic tangent function expansion method and homogeneous balance method, some exact traveling wave solutions, including solitary wave solutions are obtained for the phase transitions model in one space dimension.
An Approach to Analyze Pose Accuracy of Master Slave Surgical Robot with Matlab
Authors: Zhang Jian Ye , Wang Wei , Zhao Chen , Zhang Heng
Published: December 2011

In the design of master-slave surgical robot proper accuracy must be guaranteed. As the configuration of the master robot is generally different from that of the slave robot, the two robots may not use the same policy of accuracy. In order to match each other with sufficient precision analysis of pose errors must be done in pair. This paper presents an approach that can calculate and analyze the end-effecter position and orientation errors of the master-salve surgical robot system. A computer program to perform the accuracy analysis has been developed in MATLAB.
Semi-Continuous Extraction of Agarwood Oil with Subcritical Water: Optimization of Plug Flow by Response Surface Methodology
Authors: Apibalsri Aunyarut , Tantayanont Supawan , Ngamprsertsith Somkiet
Published: December 2011

A semi-continuous extraction of Agarwood oil with subcritical water (105-240 [°C], pressure 1-10 [MPa], and flow rate 1-6 [mil/min]) was evaluated and optimized by using a response surface methodology. Analysis of variance demonstrated that a quadratic regression model illustrated small synergetic effects of temperature-pressure and pressure-flow rate. The optimal conditions were temperature of 207 [°C], pressure of 3.7 [MPa] and flow rate of 5.69 [mL/min], obtaining a maximum yield of 14.99[%wt]. The product obtained from the optimal condition had high yield of oil as similar as conventional extraction process while consuming dramatically shorten extraction time. This process could be considered as an innovative extraction of Agarwood oil.
Finite Element Analysis of Axial Stiffness of Extruded Sealing Ring Used in Aviation Engine
Authors: Wang Yun , Xu Jiang Feng , Cong Wei , Zhang Jin Chuan
Published: December 2011

The finite element models of extruded sealing ring which had the same installation specifications but different structure sizes of sections were established, and the results from finite element analyses of the axial stiffness of these models were compared, then, an excellent characteristic of the shape of sealing ring on axial stiffness was found.
Neodymium-Iron Garnet Crystallite and its Magnetism Prepared by a Hydrothermal Method
Authors: Ding Xun , Zhou Yong , Xia Zhao , Liu Hong Ri
Published: December 2011

Nd3Fe5O12 crystallites were prepared by a hydrothermal method using Nd(NO3)•6H2O Fe(NO3)•9H2O and Bi(NO3)3•5H2O as raw materials. XRD, SEM and PPMS were used to analyzed crystal phase, morphology and magnetism of the crystallites, respectively. XRD result showed that the crystallites present cubic garnet phase without impure phase; SEM result showed that the crystallites are composed of rhombic dodecahedron grains with a very even with size of 10 μm. Moreover, magnetism of the crystallites was studied. The crystallites present intense antiferromagnitsm.
Photocatalytic Degradation of Various Dyes by Strontium Titanate Nanoparticles
Authors: Xian Tao , Yang Hua
Published: December 2011

A simple polyacrylamide gel method was used to prepare strontium titanate (SrTiO3) nanoparticles. X-ray diffraction (XRD) analysis reveals that single-phase SrTiO3 can be synthesized at a calcination temperature of 550 °C. Scanning electron microscope (SEM) observation shows that the as-prepared SrTiO3 particles are regularly shaped like spheres and highly uniform in size with an average diameter of ~55 nm. Ultraviolet (UV)-visible diffuse reflectance spectrum analysis indicates that the bandgap of the sample is 3.23 eV. The Brunauer-Emmett-Teller (BET) specific surface area of the sample is measured, by the N2 adsorption-desorption technique, to be 26.4 m2•g−1. The photocatalytic experiments reveal that the SrTiO3 nanoparticles can effectively degrade various dyes including congo red (CR), rhodamine B (RhB), methyl orange (MO), and methylene blue (MB) under UV irradiation.
Supply Chain Quality Information Management Methodology and Application System Research
Authors: Zhao Xiu Xu , Zhu Yu Ming
Published: December 2011

Traceability is a new requirement of supply chain quality information management, but many companies have not got any effective measures yet. In response to this issue, this study firstly focuses on the management approach for traceability and discusses the quality information that need to be identified and its characteristics, then a Radio Frequency Identification (RFID)-enabled method is proposed to record the quality information; after that, a BOM-based approach is used to organize the recorded quality information; linking of these quality information is made to achieve traceability. Finally a quality information management system is built on the proposed methodology and an application research in Auto parts manufacturing industry is used to demonstrate its effectiveness. Implementation result shows that the proposed methodology can achieve traceability effectively and supply chain product quality information management has indeed improved through ensured traceability.
Dynamic Analysis of Motorcycle Engine Rod Bending and Fracture Failure
Authors: He Chang De
Published: December 2011

Taking Motorcycle Engine as the research object, force analysis of the single cylinder engine connecting rod bending and fracture by engine linkage dynamic model. By calculating the connecting rod compression, combustion chamber total pressure, reciprocating movement of the inertia force and from the rod bend parameters to compare the models currently on the market four types in the working state suffered total stress and strength margin safety factor, found that the safety factor of four models in general partial link is small, especially 152QMI engine connecting rod end connecting rod in the hole near easier to bend and break. This study provide a scientific basis for the engine connecting rod design, the quality of correction and failure analysis.
Research on Thermal Analysis of Pillow Spindle System with Multi Axes Rotary Spindle Head
Authors: Hao Chao , Huang Jun Gui
Published: December 2011

Based on the theory of finite-element method, a model of pillowed multiple axes rotary spindle head is built. Taking both temperature and structure load into account of the model, a calculation is made on thermal couple deformation under the combined action of the two kinds of load. A prediction on the rationality during system designing is put forward, which has gotten a wider use.
The Measurement Method to Position Coordinates of Movable Platform for 3-TPT Parallel Machine Tool
Authors: Guo Jian Ye , Liu Yu Chang , Sheng Zhong Qi , Zhao Liang
Published: December 2011

This paper took a kind of 3-TPT Parallel Machine Tool (PMT) as the object of research, and it mainly researched the measurement method to position coordinates of movable platform in PMT. First the paper introduced the structure of 3-TPT PMT. Then illustrated the device structure and the basic measurement principle for measuring the position coordinates of movable platform. Finally carried on the theoretical analysis to the specific measurement method and established the corresponding mathematics relationship. The measuring device that was presented in this paper had characteristics of direct-viewing measurement relationship, simple structure and low cost etc., and simultaneously the research results of this paper laid a theoretical foundation for improving the movement precision of this PMT and had important practical significance.
Study on Automobile Engine Vibration Test Based on LabView Software
Authors: Yang Zheng Cai , Deng Zhao Wen
Published: December 2011

A set of Vibration Measurement and Analysis System was Researched. It is the PC as a hardware platform and the labview as a software platform that Completed the whole system. The system contains the necessary sensors, signal conditioning ,data acquisition card and so on.It has data collection, processing,analysis,and results show functions. The Users can carry on the vibration signal analysis by Modules. Software functions Consists mainly of Signal acquisition, historical data access, data filtering, signal analysis and so on. The system is stable, full-featured, easy to operate and has good scalability and low cost high performance.
Conductivity Studies on Li1-XAlxTi2-X(PO4)3 (X=0.0-0.5) Due to the Addition of Al3+ Trivalent Cation
Authors: Hamidi Maziidah , Mohamed Syafawati Nadiah , Yahya Muhd Zu Azhan
Published: December 2011

The Li-ion fast conductor, Li1-XAlxTi2-X(PO4)3 (LATP) compound were synthesized by a sol-gel method. Effects due to the addition of Al3+ into Li1-XAlxTi2-X(PO4)3 (x=0.0-0.5) glass-ceramics system have been investigated using electrochemical impedance spectroscopy (EIS), X-ray differential analysis (XRD) and permittivity studies. The crystalline phase of the samples obtained confirming that they had a characteristic of glass-ceramics structure.
Research of Inspection System Based on Machine Vision for Steel Rod Surface Defects
Authors: Zhang Jian Chuan , Li Wu Bin , Lu Chang Hou
Published: December 2011

A new algorithm based on local gradient is proposed to inspect steel rod surface defects. The local gradient method can weaken the effect of noise in steel rod surface image. Then the open operation of morphology theory is employed to remove the retaining noise. Experiments show that this algorithm is effective to inspect steel rod surface defects and is time-saving.
Status and Development of the Flexible Manufacture Technique with Direct Spinning of the Polyester Textile Fibers in China
Authors: Xu Jian Mei , Bai Lun , Guan Xin Hai
Published: December 2011

Current status of the direct spinning production lines in high unit capacity of the polyester textile fibers in China are investigated, as well as the status and development of flexible production technique.
A Inductive Accelerator Based on UV Lithography of SU-8
Authors: Zhang Bin Zhen , Li Xiang Hong , Zhang Yong , Meng Xiang Jiao
Published: December 2011

This paper describes a novel inductive accelerator and investigates some of the parameters affecting its performance. As a important component of the accelerator, the resonator is composed of a new-style tunable inductor and a fixed capacitor. When an acceleration is applied on the resonator in the vertical direction, we can acquire the acceleration value by measuring the changes of the resonant frequency passing through a differential frequency circuit. Design and simulation, we get out the frequency of the accelerator is proportional to the acceleration, inductance variation ranges from 0 to 0.2*10-9H, and frequency variation is from 0 to 5.7*109HZ when the capacitor spacing is 2um. We use SU-8 photoresist to fabricate thick metal layer.
Design and Optimization of Expert Database System for Cast and Roll Production of Copper Tubes
Authors: Meng Yan Min , Liu Jin Song
Published: December 2011

To solve the problems of change design and massive work and low efficiency during Cast & Roll processes design, an expert database system for Cast & Roll process design of copper tubes has been developed. Knowledge reasoning, Artificial Neural Networks (ANN), Genetic Algorithm (GA), Numerical Simulation, Uniform Design, CAD Parameterization Design, database and Intranet have been integrated into the system for process design and parameter optimization, which can exert the advantage of each technology. The design method has been proved to be successful.
Study on the Shape of Occurrence and Developing of Evaporation Wave in Short Pipe
Authors: Liu Wei Min
Published: December 2011

When liquid within short pipe is placed suddenly into low-pressure environment from an atmospheric pressure, the effects of temperature and pressure on occurrence and developing of evaporation wave are studied, the variations of flow patterns are observed. The experimental results show that flow patterns of liquid within short pipe gradually change from bubble rising to blazing bubble flow until annular flow with a decrease in initial environmental pressure. Intensity and moving speed of the evaporation wave increased with a decrease of the diameter of pipe and pressure, and an increase of the fluid temperature. The evaporation wave fronts are in a state of explosive vaporization, instantaneous propagation velocity of evaporation wave fronts is violently fluctuating.
Analysis of Aperture Phase Errors Using Interval Method
Authors: Ma Hong Bo , Xu Xiao Feng , Song Li Wei
Published: December 2011

This paper studies the aperture phase errors of reflector antenna based on the interval method. Through the interval matrix perturbation algorithm and the interval truncation algorithm, the effect of surface nodal displacement intervals on the aperture phase errors is obtained. The numerical example of an 8m diameter reflector antenna shows that the method is rational and feasible.
Study on Shaped New Technology of Tractor Clutch Gears
Authors: Yu Jin Wei
Published: December 2011

A new process of hot precision forging the clutch gears was put forward. The most suitable shape of blank is designed which forms the clutch gears easy by precision forging. A practical die structure is presented for a hot precision forging the clutch gears in this treatise. A powerful die separator on the die forces the forge piece to break away from male die as soon as the hammering is over. The key technical problems that the hot forge piece sticks to the male die are solved. The improvement on technique and the economic benefit are very remarkable.
Automatic Matching Based on Dynamic Threshold in Close-Range Photogrammetry
Authors: Zhang Qian Qian , Dong Ming Li , Sun Peng , Wang Jun
Published: December 2011

Points matching is a key technology in close-range photogrammetry. The epipolar line constraint that confines the research area from two dimensions to one dimension, can improve the efficiency of matching process. In the paper, coded targets are applied to get a set of accurate correspondences of points between images, and then the correspondence set is used for calculating fundamental matrices by normalized 8-points algorithm that can be implemented quickly and simply. Because of the ambiguities, a completely accurate correspondence set will not be gained only by epipolar line constraint, and other technologies should be combined with epipolar line constraint. Three views are used to decrease ambiguities, and a method of dynamic threshold is presented to reject wrong correspondences. A proper threshold is calculated, and those correspondences whose corresponding distance is larger than the dynamic threshold, are considered as wrong matching points. Many experiments show that the correct rate of matching is about 99.98%, which means an automatic, efficient, accurate matching process can be implemented by the methods in this paper.
Surrounding Rock Stress and Deformation Evolution Character Analysis of Circular Openings in Deep Underground Engineering
Authors: Yuan Ai Ping , Ji Mao Wei , Deng Dai Qiang
Published: December 2011

Hard rock generally performs ideal plastic character after the stress reaches its peak value with high confining pressure. Once the plastic strain satisfies certain condition, the brittle failure occurs, and the rock mass located in the residual region. Based on the mechanical model of hard rock under high confining pressure, we studied the surrounding rock stress and deformation evolution law of circular openings. The results shows that there is a significant end constraint effect at the opening face, and the deformation induced by disturbance is about one sixth of its total value. The results can provide theoritical foundation for deep underground engineer lining design.
Explosive Characteristic of Pulverized Coal Explosion
Authors: Li Jia Hu , Yin Li Bao , Wu Wei
Published: December 2011

From the point of safe operation for power plant boiler, this paper concludes and analysis the basic conditions of pulverized coal explosion, the basic mechanism of the explosion. And, this paper indicates the influence of pulverized coal explosion and parameters to evaluate the explosive characteristic of pulverized coal.
Analysis and Optimization of the Static and Dynamic Characteristics of Head Frame
Authors: Wang Yu Lin , Jin Na , Liao Kai , Guo Rui Jin , Feng Hu Tian
Published: December 2011

The head frame is a key component which plays a supportive and accommodative role in the spindle system of CNC machine tool. Improving the static and dynamic characteristics has profound significance to the development of machine tool and product performance. The simplified finite element modal is established with ANSYS to carry out the static and modal analysis. The results showed that the maximum deformation of the head frame was 0.0066mm, the maximum stress was 3.94Mpa, the deformation of most region was no more than 0.0007mm, which all verified that the head frame had a good stiffness and deforming resistance; several improvement measures for dynamic performance were also proposed by analyzing the mode shapes, and the 1st order natural frequency increased 7.33% while the head frame mass only increased 1.58% applying the optimal measure, which improved the dynamic characteristics of the head frame effectively.
Optimization Design of Kinematics Performance of High-Speed Spatial Parallel Coordinate Measuring Machine
Authors: Chen Xiu Long , Gao Qing , Feng Wei Ming
Published: December 2011

In order to improve kinematics performance of high-speed spatial PCMM(parallel coordinate measuring machine), the comprehensive dexterity coefficient, which are defined to evaluate the whole dexterity of various configurations, was applied to the kinematics performance optimization of PCMM. By analyzing three dexterity measures, including conditional number, the smallest singular value and operation of PCMM, the comprehensive dexterity coefficient was proposed. The influence law of the distribution position angle of the joints on the stationary platform and moving platform, the distribution position radius of the joints on the stationary platform and moving platform on the comprehensive dexterity coefficient were discussed. On these grounds, the distribution position angle of the joints on the stationary platform and moving platform, the distribution position radius of the joints on the stationary platform and moving platform were optimized. The simulation results show obvious improvement of the kinematics performance for PCMM, so that the powerful theoretical basis and method of optimization design for the PCMM are provided.
Review on Construction Method of Subway Station
Authors: Li Wei
Published: December 2011

All the construction methods of subway stations are firstly reviewed in the world, which are cut and cover method, mine tunneling method, tunnel boring machine method and combination methods of them. Finally characteristics of various construction methods are analyzed in detail.
Development of Nanomaterials Electrochemical Biosensor and its Applications
Authors: Xiang Qian , Gao Ying , Liu Jing Qiu , Wang Kun Qi , Tang Juan , Yang Ming , Wang Shu Ping , Wang Wei Ling
Published: December 2011

Study of the electrochmeical biosensor has become a new interdisciplinary frontier between biological detection and material science due to their excellent prospects for interfacing biological recognition events with electronic signal transduction. Nanomaterials provided a significant platform for designing a new generation of bioelectronic devices exhibiting novel functions due to their high surface-to-volume ratio, good stability, small dimension effect, good compatibility and strong adsorption ability. In this paper, we review the development of electrochemical biosensors fabricated with various nanoscale materials, also highlight the analytical applications in terms of biochemistry.
The Creative Design of Injector Clamping Mechanism
Authors: Zhou Wan Chun , Liu Dong Min
Published: December 2011

Abstract. Analysis of a certain topological structure characteristics of clamping mechanism of injection machine, according to general principles, converts it into only containing Deputy General of the connecting rod and rotating chain. Bodies comprehensive theory of numbers after distribution combined with rod classes are general Atlas of kinematic chain. After identifying design constraints, on the redistribute members and turn the pair, you can get all man foot design requirements of viable specific Atlas of kinematic chains. Then every possible specific kinematic chain materialized to the schematic diagram of mechanism. Designers are on this basis through the kinematics and dynamics analysis to determine the best new clamping mechanism of injection machine.
Reliability Assurance Measures of CNC System Software
Authors: Zhang Hai Bo , Liu Guo Dong , Zhao Hong Miao
Published: December 2011

Based on the technology characteristics of CNC system software, the corresponding assurance measures are set for the reliability in design stage, program implementation stage and software testing stage respectively. CNC system software reliability is improved by modularizing program design and structure program design, code review and program readability, using different reliability testing methods. Finally the purpose is accomplished that the whole reliability of CNC system software is improved.
Design of Injection Mould for Back Shell of Radio
Authors: Wang Chun Wei , Mao Xiao Feng , Mo Zhuo Qiang
Published: December 2011

The process characteristics of back shell of radio were analyzed, and both the structure and working process of injection mould were introduced.
Performance Test Specification for Passenger Car in Low Temperature
Authors: Mi Chen , Han Da Ming
Published: December 2011

The study of this article focus on the standards on the working limit of the passenger car. The standards for passenger cars at low temperature were studied and proposed by combination of the technical content in cold regions’ environments and the development trend in the domestic and international situation. The proposed standards can improve the service life of mechanical parts, reduce wear and failure of passenger cars and improve the passenger's power, economy and security. In the industry standardization and the objective requirements of relevant standards, this proposed standards are the basis to ensure fair competition in international trade, maintain the normal order of market and make up a communication bridge among the international economic cooperations. Maintain maximum benifit of the China's auto industry in the internationality. The emphases of the standards is to establish standards for low temperature environment laboratory, draw our own standards on product characteristics and screening standards system in line with China's actual conditions.
Fabrication and Characterization of Regenerated Cellulose/TiO2 Nanocomposite Hybrid Fibers
Authors: Shu Shun Xin , Li Chao Rong
Published: December 2011

Nanocomposite fibers are one of the most fascinating materials with broad applications. In the present work，nanocomposite fibers were prepared by a low-cost, simple, and “green” process. The nanocomposite of cellulose acetate/TiO2 was realized by combining the functional oxide material TiO2 with the regenerating electrospun cellulose acetate fibers. The structural features were characterized by scan electron microcopy, transmission electron microscopy and infrared spectrum. The compositing mechanism was proposed. The surface functionalized hydroxyl by the regenerating process plays an important role for the formation of hybrid material.
Coal Hybrid Heavy Aromatics Vehicle by Fuel of Experimental Research
Authors: Han Da Ming , Sun Shi Qiang , Li Shu Quan
Published: December 2011

With the rapidly developing of our country's economy, the demand of diesel fuel is increasing. But the fuel resource is limited. Because diesel fuel's incomplete combustion can pollute environment, it is getting more and more attention of people. The current problems of saving energy and reducing consumption needed to resolve, especially diesel particulate after combustion emissions are gasoline 30 to 70 times. The environmental pollution caused by automobile exhaust already quite serious, in this new clean diesel exploring alternative fuels is imperative, the research of this aspect has also been the world attention. A bench test of 490QB diesel engine was conducted with self-developed heavy aromatic fuel mixture of coal. Road test proves that using heavy aromatic fuel mixture of coal on diesel fuel can save fuel. The power performance of heavy aromatic fuel mixture of coal was equivalent, and fuel consumption decreased and smoke emissions reduced obviously compared with common diesel fuels.
Influence of Preparing Conditions on the Property of a New White-Light Long Afterglow Phosphor Sr2SiO4: Pr3+
Authors: Chen Lin , Zeng Hui Hui
Published: December 2011

A new white-light long afterglow phosphor Sr2SiO4: Pr3+ was synthesized by solid-state reaction, the influence of preparing conditions on the luminous property of Sr2SiO4: Pr3+ were studied, and characterized by X-ray diffractometer, fluorescence spectrophotometer and thermo luminescence(TL) meter. The results indicated that the emission spectra of phosphor is composed of bluish purple (390nm), green(535nm)and red(604nm)light emission, and the sample prepared at 1473K, heat treatment time for 4h, 0.5mol% Pr3+ and 1mol% flux H3BO3 conditions shows the best property.
Preparation and Dielectric Properties of Dy-B-Si-O Glass-Doped Ba0.6Sr0.4TiO3 Ceramics
Authors: Liu Gui Shan , Yang Lan He , Ma Tie Cheng , Wu Kai Zhuo , Zhang Zheng Jie , Shen Xiao Yue
Published: December 2011

Dy-B-Si-O glass-doped Ba0.6Sr0.4TiO3 (BST) ceramics based on sol-gel-derived powders were prepared. Effects of B2O3-SiO2 in Dy-B-Si-O glass on phase structure, microstructures and dielectric properties of the BST ceramics were investigated. The results showed that the main crystal phase of BST ceramics with appropriate B2O3-SiO2 in Dy-B-Si-O glass had a perovskite type structure. Grain size decreased and density increased compared with pure BST ceramics. However, the secondary phase Ba2TiSi2O8 was detected when the percentage of B2O3-SiO2 in Dy-B-Si-O glass additive was over 7 mol%, and increased with the increasing of B2O3-SiO2. With the increasing of B2O3-SiO2, the dielectric constant increased firstly and then decreased, the dielectric loss decreased firstly and then increased, the Curie temperature moved to lower temperature firstly and then to higher temperature.
Effect of Welding Residual Stress on Fatigue Performance of the Welded Joints Treated by Ultrasonic Peening
Authors: Wu Liang Chen , Wang Dong Po
Published: December 2011

The fatigue tests of Q235B steel unload longitudinal fillet welded joints containing high welding residual stress were carried out. And the effect of welding residual stress on fatigue performance of the welded joints treated by ultrasonic peening has been studied. Specimens were divided into four groups: as welded, specimens treated by ultrasonic peening(UP), specimens treated by stress relief treatment(SRT) and specimens treated by both ultrasonic peening and stress relief treatment(UP+SRT). Test results show that the effect on fatigue performance of the welded joints treated by ultrasonic peening from welding residual stress is small. It is safe that using the small specimens treated by ultrasonic peening and not containing high welding residual stress to appraise the fatigue performance improvement on large-scale welded structures which are as the same junction style and thickness as the small.
Preparation and Ferroelectric Properties of Sol-Gel Derived (Ba0.95Ca0.05)TiO3 Ceramics
Authors: Yang Xue Liang , Deng Xiang Yun , Han Li Ren , Yang Ren Bo , Zhang Yan Jie , Wang Chuang Fang , Zhang Xiao Long , Liu Jia , Wang Yi Shan
Published: December 2011

Ba0.95Ca0.05)TiO3 (BCT) ferroelectric ceramics were prepared from powders synthesized using a sol–gel process. Structural evolution of the BCT dry gels are investigated by thermal gravimetric analysis differential scanning calorimetry. It is found that BCT crystallites can be formed before 800°C. Well-sintered samples are synthesized at 1320°C for 2h. The crystal structure of the BCT ceramics is studied by XRD and ferroelectric properties of the ceramics are characterized by TF analyzer 2000. The Curie temperature Tc of the BCT ceramics is at about 130°C. The maximum dielectric constant (εr) reaches about 13678 at 130°C and hysteresis loops are measured with the temperature range from 25°C to 150°C.
Coating of Ti64 Bearings in Air by Using a Q-Sw Laser
Authors: Rozwadowska Justyna , Kida Katsuyuki , Santos Edson Costa , Honda Takashi , Koike Hitonobu , Kashima Yuji , Matsumoto Ryo
Published: December 2011

The influence of surface oxidizing using a Q-sw laser on the wear loss of titanium-4Al-6V (Ti64) alloy during rolling contact fatigue is investigated. Titanium components are widely appreciated for their superb biocompatibility, high strength to weight ratio and corrosion resistance. Due to the above mentioned advantages titanium bearings are a popular choice in applications requiring high strength, light weight, and minimum maintenance (for example, aerospace and defence industries). In these rolling contact applications however issues such as fretting and wear related problems are a common occurrence as the tribological properties of titanium alloys are inferior to those of other metal alloys, such as steel. In an attempt to tackle this problem, a Q-sw laser was used in this work to coat Ti64 bearings with complex titanium oxide layers in a closed chamber without any protective gas. Non-coated and coated samples were tested under water by using a thrust-type rolling contact fatigue machine. The morphology and crystallographic texture of the layers were observed by laser confocal microscope, scanning electron microscope and X-ray diffraction. The wear loss of the coated samples was at least fifty-fold lower than that of the non-coated bearings and a 3-fold increase in the maximum load capacity compared with TiN layers was achieved.
The Comparison of the Adsorption Performances of Phenol onto H103 Resin and XAD-4 Resin
Authors: Xiao Gu Qing , Wu Yu Xiang
Published: December 2011

The objective of this work was to study the comparison of the adsorption performances of phenol in aqueous solution onto H103 resin and XAD-4 resin. Experimental results showed that the molecular form of phenol is favorable for the adsorption. The adsorption capacity of phenol onto H103 was much larger than that of XAD-4 due to its average pore diameter. The pseudo-first-order rate equation can characterize the adsorption of phenol onto H103 and XAD-4. The rate constant k1 for XAD-4 is greater than the one of H103 at the same condition, consistent with the shorter required time for XAD-4.
Study on the Mechanical Properties and Frost Resistance of Recycled Concrete Prepared by Village Construction Wastes
Authors: Liu Jun , Li Yao , Hong Dan Dan , Liu Yu
Published: December 2011

Abstract. Recycled aggregate—rural building material wastes pretreated by cement mortar—are applied into concrete with different replacement rates: 0, 25%, 50%, 75%, and 100%. Results from measurements of compressive strength, cleavage tensile strength, mass loss after fast freeze-thaw cycles, and compressive strength loss indicate that a different recycled aggregate replacement rate certainly influences concrete mechanical properties and frost resistance. Recycled aggregate replacement rates less than 75% performs better than common concrete. Data from the 100% replacement rate is worse than that of rates less than 75% but still satisfy the general demands of GB standard on C30 concrete.
A PMA-Based Collaborative Strategy for Reliability Design and Optimization of Multidisciplinary Systems
Authors: Yu Rong Gang , Zhang Jun , Zhang Bing
Published: December 2011

To tackle the computing efficiency and robustness problems caused by the reliability index approach (RIA) in reliability-based multidisciplinary design optimization (RBMDO), a new performance measure approach-based method for RBMDO is proposed. Meanwhile, the traditional triple-level nested flowchart of RBMDO is decoupled through the main idea of sequential optimization and reliability assessment (SORA). Both deterministic multidisciplinary design optimization and the multidisciplinary reliability analysis are executed by collaborative optimization (CO). Finally, the proposed method is verified through the design example of gear transmission.
Inhibited and Enhanced Spontaneous Emission Using Silicon-Based on Finite Thickness Photonic Crystal Waveguides
Authors: Amorntep Wichasirikul , Wanchai Pijitrojana
Published: December 2011

Inhibited and enhanced spontaneous emission of light is essential to quantum optics in design and development of high efficiency optical devices which are useful to security optical communication system. Thus, we performed to develop an efficient single photon source by controlling inhibited or enhanced spontaneous emission of the photon using silicon-based honeycomb lattice patterned finite thickness photonic crystal waveguide. A quantum dot embedded in planar photonic crystal membrane waveguide is the light source. The honeycomb lattice of circular air holes on silicon plate is simulated to obtain large completely photonic band gaps. This significant property shows the potential applied guide modes of photonic crystal membrane for controlling inhibited or enhanced spontaneous emission between the quantum dots and the photonic crystal waveguide. Significantly, this work is oriented to produce the novel single photon sources which can emit one photon at a time for the quantum optical security network with single photon state. In addition to the honeycomb lattice can easily be made on a Si on insulator (SOI) wafer.
Design for Optimal One-Dimensional Surface Profile of EVA on Solar Cell Modules
Authors: Li Yang , Zheng Xiao Dong , Shen Lin Fang
Published: December 2011

Ethylene Vinyl Acetate (EVA) as package material is widely used in solar cells modules. Conventionally, it is laminated on both sides of solar cells with a planar surface profile, which will lead to high reflectance when the light incident angle is larger than 60°. We proposed a 1-dimensional triangular surface profile of EVA on solar cell modules with base angle about 43°. The investigations show that a 9.9% efficiency improvement of solar cells can be obtained by reducing its surface reflectance.
Effect of Amorphous and Nanocrystalline Inoculant on Microstructure and Mechanical Properties of High Chromium Cast Iron
Authors: He Chuang , Cui Chun Xiang , Shi Wei Dong , Liu Qing Xin , Fang Lin
Published: December 2011

This paper aimed at the effect of the Fe-Si-B-Re ribbons inoculant prepared by melt-spinning on microstructure and mechanical properties of high chromium cast iron. The structure of Fe-Si-B-Re ribbons consisted of amorphous matrix and nanocrystallization phase. The microstructure of the high chromium cast iron modified by Fe-Si-B-Re ribbons is more refined, and its mechanical properties are more improved than the one without modified.
Research on the Hydrothermal Processing of Mica-Titanium Pearlescent Pigment Precursor
Authors: Ji Wen Jin , Li Da Guang , He Xiang Zhu , Zheng Yu Ying , Yu Chao
Published: December 2011

This paper represents the study of hydrothermal processing of mica-titanium pearlescent pigment precursor. Mica-titanium pearlescent pigment precursor was prepared by boiling sulfuric acid hydrolysis method. Then the precursor was put into an autoclave and heated at 180°C～240°C for 4～12 hours. The results showed that the crystallinity of TiO2 increased with longer hydrothermal time and higher hydrothermal temperature. The morphology of mica-titanium pearlescent pigments which was prepared by high-temperature calcination and hydrothermal method was also studied.
Preparation and Properties of Halogen-Free Flame Retardant Polyurethane Foams
Authors: Chen Ding Meng , Zhao Yi Ping , Yan Jia Jian , Chen Li , Dong Zhi Zhi , Fu Wei Gui
Published: December 2011

Polyurethane foams (PUFs) filled with several halogen-free flame retardants and composite halogen-free flame retardants were prepared. The flame retardant, thermal stable and mechanical properties of the PUFs were investigated. The results of limiting oxygen index (LOI) and thermogravimetric analysis (TGA) revealed that PUFs filled with dimethyl methylphosphonate (DMMP) had better flame retardancy compared with other flame retardants and DMMP degraded at a low temperature to form several phosphorated acids which accelerated the formation of char layer. Composite flame retardant of DMMP and melamine (MA) had a synergistic effect between phosphorus and nitrogen. The combination of DMMP and MA slightly altered the density of the PUFs. Results from the mechanical analysis revealed that with the increase in concentration of MA in the composite flame retardant of DMMP and MA, the tensile strength of PUFs reduced firstly and then increased up to a constant.
The Assembly Success Rate and the Estimation of Assembly Time for a Flexible Assembly System
Authors: Wang Jun , Yao Zhi Jun , Guo Zhi
Published: December 2011

This paper discusses the assembly time and assembly success rate which are two important indexes of one flexible assembly system. The assembly process is conducted to a two dimension random process passage through a rectangle objective domain. The faster and slower transition probability matrices are used to deduce approximatively the distribution of assembly time and the assembly success rate. The assembly time is a PH (phase-type) distribution which is the function of correlation coefficient and variance of random process. The assembly success rate increases with the increment of assembly time. At last, an illustrated example demonstrates the results.
Data-Conversion and Displaying for Numerical Simulation of EMCC with FEM-FVM-Joint Method
Authors: Gong Hai Jun , Li Xin Zhong , Fan Xue Yi , Xu Da Ming , Guo Jing Jie
Published: December 2011

Abstract. For efficiently performing the numerical simulation of electromagnetic continues casting (EMCC) with finite element method (FEM) and finite volume method (FVM) combined scheme, a program integrates with data-format conversion and post-processing was proposed. The conversion of data format realized by linear interpolating, and the post processor developed on a Visual Fortran 6.6A platform using Fortran-95 language and the QuickWin module. Both 2-D and 3-D EM-FEM data calculated by a general-purpose FEM software, ANSYS, could be converted into FVM-data format using this program, and all FVM-data whether scalar quantities or vector ones could be displayed in the manners of cabinet drawing and normal axonometric drawing, which promises the correctness for data format conversion process of FEM/FVM-joint and the convenient analysis of transport phenomena during EMCC numerical simulation. The results of transport simulations and data format conversions indicate that the format-conversion method as well as the post processing is effective and convenient in numerical simulation with FEM/FVM-joint under various EM fields.
The Preparation of Cu2ZnSnSe4 Films by Selenization of the Oxide Precursors
Authors: Chen Gui Lin , Jin Lu , Liu Wei Feng , Jiang Guo Shun , Zhu Chang Fei
Published: December 2011

A low-cost non-vacuum process for fabrication of Cu2ZnSnSe4 (CZTSe) films by solvent-free mechanochemical method and spin-coating process is described. First, highly monodisperse Cu, Zn, Sn oxides nanoparticles are synthesized via a facile, solvent-free route. Second, the oxide particulate precursors are deposited in a thin layer by spin-coating technique. Finally, the dry layers are sintered into CZTSe thin films selenization. Through X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDS), it is found that near stoichiometric CZTSe films with a micron-sized grains are obtained in our work.
The Preparation and Characterization of Carbon Nanostructures Catalyst and its Catalytic Activity
Authors: Li Huan Ying , Bai Shu Li , Jia Wen Ping , Li Fang
Published: December 2011

In this work, the constructing of different carbon nanostructures materials were studied, and the single-structure and pure surface of carbon nanostructures were employed to as catalyst support and the morphology and structure of different carbon nanostructures-based catalysts were investigated. NO catalytic reduction was used as a probe reaction to investigate the catalytic properties of different carbon nanostructures materials and how the controlling of carbon nanostructures would affect its catalytic functions. The results show that vanadium was molecularly anchored on the surface of carbon nanostructures and the mesh-carbon nanotubes as a support show a high catalytic activity.
The Pressure Gas Line Characteristic Curve Shape Based on Origin
Authors: Ning Hui Feng , Du Min Juan , Gong Jun , Li Hao
Published: December 2011

Honing pneumatic measuring systems are widely used in pressure gas line now, and pressure gas line characteristic curve is the theoretical design basis of differential pressure gas line, drawing and analysis differential pressure gas line characteristic curve is an essential link. Based on Origin powerful graphics capabilities; you can quickly and easily draw the pressure gas line characteristic curve.
A New Approach for Colloidal Crystal Fabrication with the Template of Reversible Stress Wrinkle
Authors: Xu Qing , Yang Zhao Ting , Li Chao Rong , Chen Ben Yong , Dong Wen Jun
Published: December 2011

Wrinkle is a favorable template for patterning cells or particles. A new approach is developed to control and fabricate PS colloidal crystals with the reversible wrinkle on PDMS substrate/Pt film stressed system. The obtained structure is characterized by optical microscope and scanning electron microscope. It demonstrates that the settlement of colloids can be regulated by the buckling wavelength which can be tuned by varying the film thickness and substrate mixture mass ratio. Compared with monolayer PS film patterned on herringbones pattern wrinkle, the film on stripes pattern wrinkle always has low defect rate. It is meaningful for fabricating large-scale regular spacing and high-ordered PS colloid films.