bluuebunny/crossref_metadata_2025 huggingface dataset:
Dielectric Property of PZT Thin Films Doped with PMnN
Authors: Zhang Tao , Li Min , Liu Ting , Sun Bin , Zhou Sheng Nan
Published: September 2012

The high piezoelectricity and high mechanical quality factor thin films are very important for the fabrications of micro devices. The Pb(Zrx,Ti1-x)O3(PZT) thin films own high piezoelectricity, however, its mechanical quality factor is small. The proper doping of Pb(Mn1/3,Nb2/3)O3(PMnN) will perfectly improve the mechanical quality of the films. However, the doping of PMnN will change the dielectric property of PZT thin films, and so it’s very necessary to investigate the dielectric property of PZT thin films doped with different ratio of PMnN. In this paper, the Pb(Mn1/3,Nb2/3)O3- PbZrO3-PbTiO3(PMnN-PZT) thin films with different doping ratio of PMnN are deposited by the magnetron sputtering method, and the X-ray diffraction is applied to analyze the structure of thin films, and the relative dielectric constant are characterized by the LCR testing system. The results show that the PMnN-PZT thin films with smaller doping ratio than 20% exhibit polycrstal structure, and the dielectric constant of thin films increase with the doping ratio of PMnN sharply, especially the doped PMnN is smaller than 6 mol percent. All the dielectric constants decrease with the testing frequency, and which have little change if the testing frequency is larger than 2.5kHz.
Study on Finite Element Analysis Models of Slant Rig Working Course
Authors: Jiang Fa Guang , Liang Zheng , Zhang Li Wen
Published: September 2012

Slant-hole drilling rig, which can be used to drill inclined well from the ground, is used widely. During designing and research, it is very important to meet working reliability and requirement under various loads and working conditions. As for the complex structure of slant-hole drilling rig, we cannot get the real analytical solutions at present condition. Therefore, the paper establish the three-dimensional finite element models which are about the lifting process and working conditions of slant-hole drilling rig, study the applied loads of each working condition and analyze the stress-strain regulation of slant-hole drilling rig and its influential factor. Based on the analytical results of deformation and stress, an improvement scheme for the slant-hole drilling rig’s structure can is put forward.
Numerical Simulation Calculation of Hydroplane Direct Route Motion Based on FLUENT
Authors: Qin Yu , Liang Xiao , Zhang Jia Ning
Published: September 2012

Aiming at hydrodynamic performance prediction for hydroplane motion, numerical simulation calculation for direct route motion of a hydroplane was carried out under FLUENT software platform by using VOF method and RNG k-ε model and solving Navier-Stokes equation. Evolution of ship resistance was obtained as the velocity change, and flow field situation and dynamic pressure variation of hydroplane hull bottom were reflected intuitively. By comparing the results of FLUENT calculation and ship model experiment and theoretical estimation, analyzing, especially wake current, it was verified that numerical simulation calculation of hydroplane direct route motion and hydrodynamic performance prediction based on FLUENT are feasible and precise enough.
Dynamic Shear Stress Evaluation on Micro-Turning Tool Using Photoelasticity
Authors: Mandal Soumen , Kumar Anirudh , Nagahanumaiah
Published: September 2012

The paper presents an experimental methodology for evaluation of shear stress induced on a micro-turning tool during micro-turning operation. A micro-turning tool manufactured by Sandvik Coromant was used for micro- turning of a brass spindle. The front face of the tool was cleaned, polished and coated with a thin layer of Ethylene-Vinyl Acetate (EVA), a birefringent material. Subsequently, reflection photoelastic experiments were conducted to find the shear stresses induced on the micro-tool. A custom designed grey field poledioscope was used for this purpose which was pre-calibrated and verified using disk under compression test. The tool was subjected to turning operation and dynamic images of the tool were captured using Casio ELIXIM ZR-200 camera in high speed movie mode at 1000 fps (frames per second) for four different orientations of the analyzer simultaneously. These images were processed using a code developed in MATLAB software to generate a shear stress map of the tool dynamically at different time instants of the machining process.
FEM Analysis and Optimization of Large Load Suspended Platform
Authors: Zheng Xi Jian , Han Yong Shang , Xie Zheng Yi
Published: September 2012

Based on the Finite Element Method, the suspended platform of temporarily installed suspended access equipment was simplified and the special connection positions were dealt with rigidization and coupling, thus the finite element model of suspended platform was established. Analyzing major structures of finite element model in different section dimensions, the reasonable scheme could be ascertained and the section dimensions of major structures in different materials could be obtained. Combining with the test results, the rationality of finite element analysis could be proved. The study could provide reference for the similar products on design and development.
Influence of Front Shape on Crosswind Aerodynamic Loads of Heavy-Duty Truck: A Numerical Case Study
Authors: Hu Xing Jun , Qin Peng , Guo Peng , Wang Jing Yu
Published: September 2012

Research was done on the crosswind aerodynamic loads of three different front shape heavy-duty trucks by the method of numerical simulation. According to the research, the side force and the rolling moment of truck change slightly, but the drag and yawing moment changes dramatically when running in strong crosswind with different front shapes. The conclusions were drawn from discussion that the long head heavy-duty truck has the least yawing moment among the studied trucks so it has the best driving stability correspondingly.
Theoretical Analysis of Machine Presses’ Untimely Unloading
Authors: Zhang Shu Ke , Zhang Zhi Gang , Wu Yu Dong , Zhang J.H , Zhang Q.H
Published: September 2012

Overload protection systems are commonly installed in machine presses for the protection of press and mould. If the setting of Pre-load pressure isn't correct, the overload system should take actions untimely, which deeply influences the productivity of machine presses. In this paper, a simplified model of the safety device is build and the reason causing the advance unloading is discussed in theory.
ZnS/Ethylenediamine Hybrid Micrometer Sheets Synthesized In Situ on Zn Foils
Authors: Wang Peng , Fan Li Bo , Zhao Xiao Yuan , Zhang Zhen Hua , Zhu Xin Bing , Zhang Yan Ge , Li Pin Jiang
Published: September 2012

Inorganic-organic hybrid semiconductor micrometer sheets of ZnS/ethylenediamine were synthesized in situ on Zn foils by a simple solvothermal method for the first time. By changing the volume ratio of ethylenediamine and ethanol, ZnS/ethylenediamine hybrid micrometer sheets with different size were also obtained. The sheets were characterized by XRD, SEM, FT-IR and absorption spectra.
A New Goodness-of-Fit Test for Grouped Data
Authors: Qin Jin , Yang Jun
Published: September 2012

In data analysis of reliability, the traditional goodness-of-fit test is not applicable for grouped data under some circumstances. In this paper, a Kolmogorov-Smirnov test based on survival ratio method is proposed to determine the distribution type of grouped data. The power of the proposed test and other well-known goodness-of-fit tests are compared by Monte Carlo simulation, and the results show that the proposed test method is more powerful.
Experiment and Simulation of a Laser Shock Wave Driven Cantilever Beam
Authors: Wu You , Xiong Liang Cai , Zhou Quan Sheng , Xia Jun Chao
Published: September 2012

A new driven pattern is proposed in this paper, which is based on laser shock wave and outstand in high energy efficiency, remote control, wireless and directionality. We describe the working principle of the laser shock wave driven pattern in detail. Furthermore, by a copper irradiated cantilever beam, the vibration state driven in different laser conditions is investigated with simulation and experiment, corresponding numeral analysis is performed to assess the driven effect.
Development of High-Efficiency Tree Planter Based on Non-Smooth Surface of Blunt Body
Authors: Hu Bo Qin , Dong Jing Shi , Hu Xing Jun
Published: September 2012

A new machine was researched and developed for planting and sapling working with a part for digging in the same step. While the pit is completed, the sapling is planted. In the paper the institution’s efficiency of the part for digging was analyzed and optimized. Based on non-smooth of blunt body, the paper developed the surface of the cone which contacts with sand. It contributes to a higher efficiency.
An Improved H-Converter Circuit Electromagnetic Interference Analysis
Authors: Zhang Wei
Published: September 2012

H-type converter circuit for the power switch on and off the moment will have a great pulse peak, it Will affect the safe use of components and produce large amounts of electromagnetic interference shortcomings，the paper made some changes of the H-type converter circuit. And in Matlab environment for modeling and simulation, changes before and after the two simulation results show that: the pulse peak is effectively suppressed; also inhibit electromagnetic interference, Improved the electromagnetic compatibility of equipment.Simulation and experimental results show that the technique is feasible
Finite Element Model and Analysis of Mandibular Incisors' Orthodontics
Authors: Deng Xiao Fan , Jiang Ling
Published: September 2012

This paper uses finite element method (FEM) to simulate the stress distribution and the displacements during the orthodontic process of the mandibular lateral incisor. It provides theoretical guidance for the design of the orthodontic treatment. This study is as follows: (1) Use the software of MIMICS to reconstruct models of the mandible and the dentition by CT scanning images. (2) Use the software of Pro/Engineer (Pro/e) to simplify the model built in Mimics, establish the model of the orthodontic brackets, and assemble the mandible, the dentition and the brackets together. (3) Simulate the process of orthodontic surgery, use the software of ANSYS to study the effect of orthodontic surgery by changing the direction in which external force is applied, and reveal the regularity of displacements and stress distribution of the mandibular lateral incisor caused by local displacements.
The Application of Magnetic Drive Technology in the Desulfurization Side Entering Agitator
Authors: Gao Zhi , Li Li , Zhang Tong Gang , Nie Peng Fei
Published: September 2012

In order to solve the problems followed mechanical seal leakage of the side entering agitator in wangtan power plant limestone - gypsum FGD, a magnetic drive technology was introduced, compared the characteristics of mechanical transmission to the magnetic drive technology. Magnetic drive technology was used in the desulfurization side entering agitator, and it’s an effective solution to the desulfurization side entering agitator mechanical seal leakage problem, the effect is significant.
Numerical Study on Three-Dimensional Steady-State Temperature Field of a Gasoline Engine
Authors: Wang Guan Xiong , Chen Hai Bo , Yuan Zhao Cheng , Lu Wei
Published: September 2012

Today CFD is an important tool for engineers in the automotive industry. To simulate and optimize the fluid flow and heat transfer in the engine, the research is carried out. The geometric models of a gasoline engine and the cooling water jacket are simplified by Pro/E software firstly. Then solid - liquid coupled heat transfer analysis is done by using CFD software FLUENT. Temperature field distributions in the engine body and the cooling water jacket are obtained. An engine temperature test bench is set up, on which temperature values of key points are measured. The analysis on the errors between the experimental data and the calculation results shows that the temperature distributions in the engine are reasonable and the cooling performance of the water jacket meets the design requirements. The deviations between the experimental data and calculated values on the measuring points are not big, so the calculation method has high accuracy. The data obtained in this experiment can be used as the basis in the following study.
The Analysis and Simulation of Stability on Cutting Chatter System Based on Matlab
Authors: Xie Jin Hua , Huo Rui , Gao Ying , Guan Yan Feng
Published: September 2012

Cutting chatter is a complexly phenomena of dynamic instability in mechanical processing process, scholars have done lots of researchs about it[1]. This paper has deduced the kinematics differential equation and limit cutting width of regenerative cutting chatter, analyzed the influence of dynamic parameters on the stability of cutting system. Simulation of time signal on cutting chatter is modeled through Matlab Use mathematical method[2] to obtain numerical value of limit cutting width.
Sensor Optimization for Cutting Status Monitoring in Single Manufacturing Unit
Authors: He Kang , Jia Min Ping , Zhao Zhuan Zhe , Wang Rong
Published: September 2012

The effectiveness of status monitoring in cutting process is contingent on the effectiveness of the sensor location optimization. A novel adaptive evolutionary algorithm (AEA) based on genetic algorithm (GA) to achieve an optimal sensor configuration for monitoring the cutting status closely related to the workpiece quality is proposed. Based on an understanding of the cutting principle, the minimal failure probability at minimum cost is the optimal target and the detectability and the false alarm rate are defined as the constraint conditions. The feasible region of solution is presented in decimal coding . The crossover operator and population size are adapted relative to the iterations estimated by a Markov model,which improve the convergence. The results of a case study have been found to agree well with the optimized results by AEA .The optimal scheme of AEA yields the minimal sensing stations while simultaneously attaining 99.99% system detectability and renders nearly 60% decrease in sensor cost in comparison to the scheme of saturated sensing.
Semantic Model Construction of Emergency Plan Based on Category Theory
Authors: Huang Wei Dong , Wu Mei Rong , Yan Li
Published: September 2012

Focusing on the semantic heterogeneity existing in the representation and storage of emergency information vocabulary, the top concept of emergency plan is refined, generalized, and associated by introducing category theory. Furthermore, semantic model of emergency plan ontology is established, and field concepts are united and standardized. Based on the structure template, knowledge segments of emergency plan are categorized to mine the implied semantic relations between concepts. Finally, the understanding of a particular concept set in a specific field is analyzed by using examples.
Research on Piezoelectric Self-Adaptive Micro-EDM CNC System
Authors: Zhang Ya , Zhang Qin He , Fu Xiu Zhuo , Zhang Chun Xing
Published: September 2012

Piezoelectric self-adaptive micro-EDM can improve machining efficiency of micro-EDM effectively. To meet the requirements of micro-EDM, a computer numerical control (CNC) system based on personal computer (PC) and Mercury C863 controller is developed. The hardware structure and software structure of the CNC system are discussed in the paper. Algorithms and functions of the software are also analyzed. The CNC software is successfully designed with VC++ (2010). Extensive experiments show that the CNC system is reliable, stable, efficient and high accuracy. The new micro-EDM CNC system has a short development time and a low cost.
Algorithm Base on Gamma-Ray Computed Tomography Method for Gas-Solid Flow Time Average Concentration in Cyclone
Authors: Liu Xiao Cheng , Hu Xiao Kang , Chen Jian Yi , Wei Yao Dong
Published: September 2012

A new approach to the gamma-ray densitometry tomography(GDT) technique was proposed for measurement of gas-solid flow in cyclone, where the time average concentration field can be simplified to continuous function and symmetry system, based on only one bunch of through the regional center’s ray and another distance the center d position’s ray data, through the measurement of body. So it realized faster data acquisition and image reconstruction, and possessed both the continuous function model’s high gradient of radial concentration distribution and highly accuracy. Due to the collected data were severely diminished, the method sharply reduced the cost of image scans mobile system. The numerical simulation proved the accuracy of that algorithm base on gamma-ray computed tomography method for gas-solid time average concentration field in cyclone
Predict Hypotension Events during Spinal Anesthesia Based on Particle Swarm Optimization Neural Networks
Authors: Dai Hai Jun , Qiu Yu
Published: September 2012

Neural network model based on particle swarm optimization (PSO) was established for predicting hypotension during general anesthesia. The BP neural network parameters optimized by pso, and learning samples are trained and modeled by BP neural network with optimal parameters. The simulation experiment is carried out with MATLAB. The result indicated that the model forecasting results are close with the actual results and meet the accuracy requirement to General Anesthesia.
Efficient Framework of Cloud Computing Ontology for the Global Factory Automation
Authors: Jeong Hwa Young , Choi Hae Gill
Published: September 2012

Cloud computing is hot issue and new trend in not only IT based application but also the system platform. Therefore many industrial areas try to apply this computing environment for their product improvement and operational efficiency. This research aims to consider a method how can we design and provide the service using the cloud computing. Furthermore we consider the framework that is able to use the cloud service as cloud resources for manager, engineer, and system operator in global factory automation.
Research of Multi-Axes Motion Control System Based on LabVIEW Platform
Authors: Deng Lu Hua , Li Jun Hui , Liu Ling Gang
Published: September 2012

According to Dynamic Link Library (DLL), the common motion card was successfully run on Labview virtual platform, which can graphically compile program. Based on Labview8.6 platform, Leadtech SMC-6480 control card and Yaskawa SJME-02AMA41 servo motor were used as the hardware to realize multi-axes motion control. The results indicated that each axis has three motion models of automatic, manual and return-to-zero, which can switch mutually at any time.
Design of Equipment’s Transportation Programs and Transport Activities
Authors: Deng Tian , Wang Nai Chao , Ma Lin
Published: September 2012

With the developing of global trade, the role assumed by the logistics industry is increasing important. Transportation act as the main pillars of the logistics system, connecting suppliers, manufactures and customers Transportation is a means of connecting scatted factories and warehouses of the entire supply chain. Traditional transportation design emphasis on design and means of transportation decision-making on transport nodes and networks. In this article, transportation is designed based on systems engineering, considering the entire life cycle of the equipment . The factors in transport program is given in detail to be considered in the design of the equipment life cycle transport program, and gives the design process of the transport activity.
Design of Automatic Guided Vehicles Based on Computer Control
Authors: Wang Jun , Chen Ting Zhi , Liu Chao Ying , Ye Shu Guang
Published: September 2012

The automated Guided Vehicles is the development trend of modern automated warehousing technology, which can realize the flexible transport, the use of flexible, high transport efficiency, energy saving, no pollution, significant savings in labor costs. The paper gave a brief introduction about the structure and function of the AGV, and a detailed description about the movement mathematical model and navigation calculation of the AGV. In the end the paper designed the control system of the AGV.
A Wire Feed Control System Based on Detecting Induced Electromotive Force of the Motor
Authors: Lu Zhen Yang , Huang Peng Fei , Zhang Yong Gang , Bai Shao Jun
Published: September 2012

A stable and even wire feed speed is a guarantee of good quality welding. A new wire feed system, without any speed-measuring equipment, has been designed. And the motor current of this system works in a discontinuous state. When the motor current is zero, it detects the induced electromotive force; acquires the motor speed according to the relationship between the induced electromotive force and the motor speed; calculates and compares with the given speed then changes the duty cycle of the voltage added on the motor by PWM technology, that control the motor speed. Then a stable and even wire feed speed can be achieved. Verified by testing resistance, the change rate of the wire feed speed is slightly, which proves that the new system has good mechanical properties and a stable speed. Besides, it runs reliably.
A Study of Fibrin Zymography Method for the Assay of Plasminogen Activators
Authors: Huang Ming Xing , Yu Xiao Qian , Ye Yun
Published: September 2012

Sodium dodecyl sulfate polyacrylamide gel electrophoresis (SDS-PAGE) is the most important and widely used technology which is mainly used to analyze the protein molecular weight. Fibrin zymography based on the SDS-PAGE is the best method for qualitative analysis of unknown plasminogen activators (PAs), especially for the analysis of molecular weight. In electrophoresis technique, molecular weight marker is the most important factor. However, it is difficult to detect protein molecular weight markers in fibrin zymography. In this study, some important factors, such as concentrations of fibrinogen and plasminogen, are discussed. Our results provide an efficient and convenient method which can clearly exhibit the dark blue bands of protein molecular weight (MW) markers and the transparent bands of PAs against the light blue background on one gel at the same time, and show high sensitivity.
Traffic Impact Analysis of Road Construction Based on Vissim
Authors: Yang Ya Zao , Hao Xiao Ni , Luo Jun Shao
Published: September 2012

During the construction of urban road project, the surrounding road network will encounter a huge impact, traffic problems therefore emerged. Accordingly, traffic impact analysis is particularly important for policy setting. Taking the rapid improvement project of Changjiang road in Zhongshan city for example, this paper used a simulation software Vissim to analysis the impact of Bay road during the construction project. Evaluation results can give some forward-looking, targeted traffic organization, facilities and other improvements measures.
Design of Data Acquisition System Based on LabVIEW
Authors: Liu Ling Gang , Li Jun Hui , Deng Lu Hua
Published: September 2012

Based on LabVIEW, this paper presents a design scheme of data acquisition, which it proposes using computer and ordinary data collection card as the main hardware and LabVIEW as software development platform, thus constructs the virtual instrument system for signal acquisition. The system can realize synchronous data acquisition of single channel or multi-channel signal, as well as real-time display and preservation. The practice shows that this scheme can not only effectively play performance of ordinary data acquisition card, but also reduce greatly program development time and beautify interface through LabVIEW which has powerfully visual human-machine interface editor and graphical programming function.
Effect of Bump Shape on Current Density and Temperature Distributions in Solder Bump Joints under Electromigration
Authors: Li Yi , Zhao Xiu Chen , Liu Ying , Li Hong
Published: September 2012

Three dimensional thermo-electrical finite element analysis was employed to simulate the current density and temperature distributions for solder bump joints with different bump shapes. Mean-time-to-failure (MTTF) of electromigration was discussed. It was found that as the bump volume increased from hourglass bump to barrel bump, the maximum current density increased but the maximum temperature decreased. Hourglass bump with waist radius of 240 μm has the longest MTTF.
Prediction of Delamination Crack Growth in Carbon/Fiber Epoxy Composite Laminates Using a Non-Local Cohesive Zone Modeling
Authors: Ijaz Hassan , Gornet L. , Khan M.A. , Saleem W. , Nisar K. , Chaudry S.R.
Published: September 2012

The global behavior of composite materials is strongly influenced by the quality of adhesion between different components. A component can be single phase, like fibers or particles used as reinforcement in a homogenous matrix, or a multiphase material like a layer in long-fiber laminate. In the latter case the degradation of adhesion implies the separation of the layers, known as delamination. Among all different failure mechanisms, Delamination is considered to be the most prominent mode of failure in fiber-reinforced laminates as a result of their relatively weak inter-laminar strength. When laminated structures are subjected to static, dynamic or cyclic loadings, the inter-laminar adhesion strength between individual plies tends to deteriorate significantly and act as the origin of the final failure. Therefore, an efficient and reliable design tool capable of predicting delamination could improve the durability for composite laminates. There exist damage mechanics based formulations capable of simulating the delamination crack growth in carbon/glass fiber epoxy based composite laminates. The present study is focused on taking a step forward in this respect. At first, already existed local interface models effectiveness is tested and results are successfully compared with available experimental data for UD IMS/924 Carbon/fiber epoxy composite laminate. Next, a non-local integral-type regularization scheme is introduced to overcome the spurious localization problem associated to the existing local model. Basic concepts and mathematical modeling of Non-Local damage evolution law are comprehensively studied and presented in this study. Finite Element simulation results based on proposed model are discussed in detail and are compared with experimental results.
Microstructure Study of Propellant Binder
Authors: Ahmad Navida , Amir Shazia , Naheed Rafia , Baig Zafar Iqbal , Rizvi Masroor-ul-Hassan
Published: September 2012

Mechanical properties of HTPB (binder) strongly depend on its microstructure. Microstructure of HTPB consists of three major configurations cis, trans and vinyl. The contents of these configurations in the backbone of polymer chain determine the properties of end products. So it is very important to control and determine the ratios of cis, trans and vinyl in HTPB. HTPB was prepared by free radical polymerization of butadiene initiated by hydrogen peroxide in ethanol as solvent. Quantity of the initiator and polymerization time was varied in different experiments. The resulting polymers were analyzed for hydroxyl value (OH value), number average molecular weight (Mn) and viscosity (η). The results indicated that these properties were highly affected by the variation in initiator ratios and reaction time. Microstructure of the polymers was determined by FTIR spectroscopy using ATR (Attenuated Total Reflectance) assembly. Calibration curve was plotted for each functional group (cis, trans and vinyl) using corrected peak values from the spectra (corrected using cis: 804.7 to 640.1 cm-1; trans: 978.8 to 944.9 cm-1; vinyl: 927.7 to 895.2 cm-1). Cis, trans and vinyl contents of the polymers were calculated from the calibration curve. The data indicated that although the variation of initiator quantity and polymerization time affected OH value, Mn and η severely but microstructure variations were quite insignificant.
Sintering and Morphology of Porous Structure in NiTi Shape Memory Alloys for Biomedical Applications
Authors: Abidi Irfan Haider , Khalid Fazal Ahmad
Published: September 2012

The combination of attractive properties of porous NiTi shape memory alloys like high recoverable strain due to superelasticity and shape memory effect, good corrosion resistance, improved biocompatibilty, low density and stiffness along with its porous structure similar to that of bone make them best materials for biomedical implants. In current study porous NiTi SMAs have been fabricated successfully by space holder technique via pressureless sintering using NaCl powder as a spacer. Various volume fractions of NaCl powders have been involved to study their effect on the pore characteristics as well as on mechanical properties of foam. Porous NiTi with average porosity in the range of 44.3%-63.5% have been fabricated having average pore size 419µm which were very appropriate for various biomedical implants. Porous NiTi SMAs exhibited superelasticity at room temperature and shape memory effect was also determined. Maximum recoverable strain of 6.79% was demonstrated by the porous NiTi alloy with 44.3% porosity and it was diminishing with increasing porosity. Compression strength and elastic modulus have shown a decreasing trend with increasing porosity content. Elastic modulus of porous NiTi extends from 1.38 to 5.42GPa depending upon the pore volume which was very much comparable to that of various kinds of bones.
Solvothermal Method Preparation of Nano Y2O2S:Eu 3+ and Research of Luminescence Property
Authors: Lu Lu , Wang Zhi Long
Published: September 2012

The nano Y2O2S:Eu 3+0.01 were prepared with solvohtermal method. Using ethylenediamine as solvent, at 220°C for 12h , we get the best sample. The effect of various reaction times, surfactant in reaction on nano-particle size of the products were investigated in detail. Using the Laser granularity cryoscopy（rise 2008）to display the products size, the result shows that the sample size about 45nm, and the SEM shows that the morphology are nano wires. The emission spectrum shows that the strongest peak is located at 625nm, which attributed toEu 3+ ions’5D0-7 F2 transition.
Study on All Solid-State Composite Polymer Electrolyte
Authors: Wang Wei Min
Published: September 2012

So far, there has been a large number of high conductivity of solid materials to replace the liquid electrolyte. All solid-state composite polymer electrolyte materials have not yet fully realized industrial production, but many areas are moving in the direction of practical development. With the deepening of the study, the ionic conductivity mechanism and constantly improve, but the ionic conductivity of composite electrolytes should be improved, need to conduct groundbreaking research in the preparation process, structure and properties of the composite electrolyte materials have many problems. The composite polymer electrolyte materials has become an intersection of many disciplines including materials science, chemistry, physics, and the content may lead to the field of new energy materials, in particular, is a new technological revolution in the field of battery materials, which study of the problem will continue and in-depth.
Influence of Plasmonic Light-Scattering by Gold Nano-Island Structures on the Quantum Efficiency of Organic Solar Cells
Authors: Wang Bao Zeng , Zhang Xin Ping , Zhang Jian
Published: September 2012

Gold nano-island structures were fabricated on the light-illumination side of an organic solar cell device to investigate how the light scattering by localized surface plasmon resonance influences the quantum efficiency of an organic solar cell. A light beam from a solar simulator experiences multiple interaction processes with the gold nanostructures before reaching the organic active material, which may include the scattering, the reflection, and the absorption by the gold nano-islands. However, only the scattering process may partially contribute to the enhancement of the conversion efficiency. The reflection and absorption processes make the gold nanostructures act as “blockers” and prevent the light from reaching the solar cell device. Even the scattering process may not always play positive roles in improving the performance of the device. Thus, experimental studies in this work intend to find out a balance between the loss and the enhancement mechanisms, so that the efficiency of the solar cell can be improved. Our experimental results found a possibly optimized configuration of the gold nano-island structures, which leads to enhancement of the conversion efficiency of the solar cell device.
40 Gb/s Optical 3R-Regeneration Based on XPM and SPM in PCF
Authors: Xu Su Xiao , Zhou Li , Xiao Jing
Published: September 2012

A scheme to achieve 40Gb/s all-optical 3R-regeneration through cross-phase modulation and self-phase modulation is studied in this paper. The core of the scheme is to use ultra-highly nonlinear photonic crystal fiber as the Mach-Zehnder interference of one arm. Length of the photonic crystal fiber at the arm is adjusted after calculation so as to make the signal light through the arm produce nonlinear phase shift of by means of XPM effect, then mutual interference between the resulting light and the optical signal at the other arm is generated and the noise interfusing the system is eliminated to make the signal be regenerated. Furthermore, self-phase modulation effect of the fiber is applied to make further optimization of the signal, with Optisystem for simulation experiment.
Suppression of Double Rayleigh Scattering Induced Coherent Noise in a Remote Fiber Sensor System Using PGC Technique
Authors: Cao Chun Yan , Xiong Shui Dong , Hu Zheng Liang , Hu Yong Ming
Published: September 2012

Double Rayleigh scattering (DRS) induces coherent noises in remotely interrogated optical fiber sensor systems especially when high coherence laser sources are used. Phase generation carried (PGC) technique has been used in optical fiber sensors to overcome bias induced signal fading and eliminated incoherent noises at low frequency. In this paper we demonstrated that PGC technique can also suppress DRS induced coherent noises. In an experimental setup with total 50-km input and output lead fibers, we achieved maximum 7dB of intensity noise suppression and maximum 10dB of phase noise suppression. With PGC technique, DRS induced phase noise has been suppressed to the sensor self-noise level.
Research of the Technology Based on Fiber Bragg Grating for Measurement of Temperature Rise of Electrical Appliances
Authors: Wu Zhao Xi , Wei Yu Zhan , Cui Jian , Wang Shui Sheng , Dong Xiao Peng
Published: September 2012

A new method of using fiber Bragg gratings as the sensing elements in the measurement of temperature rises of electrical appliances is proposed in this paper. Comparing with the conventional measurement method with thermocouples, the new method can overcome problems such as electromagnetic interference, hazard of electrical leakage, etc. The characteristics and key components employed in the measuring system are analyzed and discussed. The experimental results show that the temperature rises of electrical appliances under test can be obtained quickly and accurately with the specifically designed sensors made by optical fiber Bragg gratings.
Performances of Non-Line-of-Sight Ultraviolet Multi-Scatter Propagation for Noncoplanar Geometries
Authors: Tang Yi Nan , Xie Xiao Ping , Zhao Wei
Published: September 2012

A multi-scatter propagation model based on Monte Carlo method is presented. This model can be applied to all the geometries, including coplanar or noncoplanar scenario. The mathematical description of this model is deduced. We obtain the spatial positions of photon with three Cartesian coordinates after each propagation step and the received judgment conditions. Employing a photon tracing technique, Monte Carlo simulation is performed to investigate the signal impulse response and the path loss. The results indicate that, when the off-axis angle increases, the amplitude of the impulse response decreases, while the path loss increases. In addition, it is observed that the pulse width increases with the off-axis angle.
A Study of Automatic Calibration in Dual Linear-CCD Camera Intersection Measuring System
Authors: Chen Xiang , Tang Jun Yong
Published: September 2012

CCD intersection measuring is an untouched technique that used to measure the coordinates of aerial moving targets, which has been widely applied in optimal test. At present, the main problem is to improve the measuring precision, and much research has been made in system structure parameter optimization, error analysis, intersection principle improving and so on. But when using the measuring system, users are always required to be clear about the working elements of the system, which restricts its usage. In addition, the instruments are disposed and many inputs must be measured manually. As a result, precision improving becomes a difficult work. After finding out the mathematic corresponding relationship between input and output variables of measuring system based on intersection measuring principle, the paper comes up with an automatic calibration algorithm wrapping up the technical details, which makes the complicated principle transparent to users. The setup and parameter adjustment of measuring system with much less manual work has been simplified and deep advancement in precision improving becomes possible.
Noise Analysis of EMCCD and Optimum Design of its Operating Mode
Authors: Zhang Yui Gui , Li Tao , He Zhi Kuan
Published: September 2012

As the core device of Low-light-level imaging technology, EMCCD noise performance determines imaging results of camera system at the most extend. In this paper, noise models to EMCCD and relevant parameters of the noise sources are discussed, and the noise effect to the parameters is simulated. Based on the results of noise analysis, optimum operating areas for inverted mode and non-inverted mode are carried out, which are the theoretical foundation and references to low-light-level camera system design.
Measurement of SO2 Using Differential Optical Absorption Spectroscopy Based Fourier Transform Filtering
Authors: Zheng Hai Ming , Dong Zhen Liang , Xie Dong Shui , Shang Xiao Xiao
Published: September 2012

Differential Optical Absorption Spectroscopy(DOAS) is widely used to determine concentrations of atmospheric species. This paper makes a measurement of SO2using DOAS based on LabVIEW, and compare the concentrations retrieved by the least squares method and the way of Fourier transform filtering. Experiment results indicate that the Fourier transform filtering is superior to the least squares method for monitoring a single SO2ingredients.
Electronic and Optical Properties of RB6 (R=La, Nd): A Computer Aided Design
Authors: Qin Ping , Xu Chao , Chen Dong
Published: September 2012

A first-principles study of LaB6 and NdB6 has been done in order to investigate their lattice constants, cell volumes, electronic structures and optical properties. Our electronic structure calculations show that the hybridizing of the Nd-p, d bands and the B-s, p states may be the main reason that NdB6 can retain its stability under ambient conditions. The DOS at EF are 0.94 and 13.70 for LaB6 and NdB6, respectively. The corresponding electronic specific heats are also obtained. Besides, the computed static reflectivities are 0.25 and 0.74 for LaB6 and NdB6, respectively. The calculated results are in good agreement with the theoretical results, although the static reflectivity of LaB6 is not consistent with the static reflectivity given in Ref. [3].
Research on Satellite Platform Vibration Compensation Technology for Space Optical Communication
Authors: Han Cheng Shan , Li Xiang Zhi
Published: September 2012

The piezo-electric steering control system is used to compensate the vibration of satellite platform. The mathematical model of piezo-electric steering system is built. The adaptive controller based on improved LMS filter algorithm is designed according to this system characteristic. The adaptive delay filter is designed to solve slow convergence speed problem of traditional algorithm. Meanwhile, the adaptive delay filter can also compensate phase delay of control circuit. The adaptive deviation filter is introduced and it effectively compensates the vibration deviation which is low frequency and high amplitude. The experimental results show that the remained errors are μrad, which meets space optical communication requirement and proves that this control scheme is valid and feasible.
Investigation on Dispersion Property of a Novel Photonic Crystal Fiber with Square Array Air Holes
Authors: Liu Yan Jun , Dai Tong
Published: September 2012

The dispersion property of a novel photonic crystal fiber with square array air holes was simulated with the vectorial beam propagation method. The impacts of the pitch and hole diameter on the effective area of fundamental mode and the dispersion parameter were evaluated. The results indicate that the effective refractive index decreases and the dispersion parameter increases with air hole diameter increasing and the pitch decreasing, the structure parameters of inner three rings air hole influences the dispersion characteristics greatly. Thus the dispersion property of the photonic crystal fiber can be tailed by the structural parameters.
A Measuring System of Focus Surface Message to Aerial Cameras Using CCD Camera
Authors: Zhao Mei , Guo Fei , Sha Yu Fang , Yang Ming Quan
Published: September 2012

A measuring system of the focus surface message of bigger aperture aerial camera was described. The image is received by the collimator of long focus and area CCD camera. The location and size of the optimum image were measured effectively by using dynamic scanning and least square method. Therefore, the accurate measurements of the focus of aerial camera lens and the location of the actual imaging surface can be realized in the relative accuracies of 0.1% and 100% respectively.
The Deformation Measurement Technology Based on Differential Fiber Interferometer with PCI Data Acquisition System
Authors: Luo Hong E , Gu Jin Liang , Chen Ping , Xia Yan
Published: September 2012

A deformation measurement technology for barrel in the launch based on differential fiber interferometer was supposed. The PCI data acquisition system and phase demodulation algorithm was used to replace the traditional hardware phase demodulation circuit which simplifying the structure and avoid the edge distortion of phase demodulation device. Experiments were done to measure the deformation of the barrel in the launch by this system. The results show that it had good response characteristics and is suitable for the transient deformation measurement of the barrel in the launch.
The Bandpass Chebyshev Microwave Photonic Filter Designwith Digital Filter Methods
Authors: Wang Xu , Nie Kui Ying , Liang Xiao Dong , Li Miao
Published: September 2012

We show the bandpass Chebyshev microwave photonic filter with digital filter design methods in detail. The structure parameters of microwave photonic filter are determined by the given transfer function of the wanted spectrum. With those structure parameters, computer simulation show the spectrum is good agreement with the advance designing.
Terahertz Filter Based on Frequency Selective Surfaces
Authors: Zhang Xiao Yu , Zheng Zhong Xin , Li Xin Xing , Tan Ren Bing , Zhang Zhi Peng , Zhou Yu , Sun Jian Dong , Zhang Bao Shun , Qin Hua
Published: September 2012

Terahertz filters based on the frequency selective surfaces (FSS) structure have been modeled and fabricated on the sapphire substrate. The terahertz (THz) transmission properties are investigated using a THz time-domain spectroscopy (THz-TDS) system. The designed two FSS-based THz filters exhibit the THz electromagnetic wave transmission and reflection characteristics, respectively, showing about 70% change of THz transmission at the frequency of 1.3 THz. It is suggested that the THz filtering effect results from the resonance behavior between THz plane-wave and resonant elements of designed metallic FSS structures. The agreement between experiments and simulations indicate that the designed THz filter show a great potential application for high-speed THz modulator.
Scattering Characteristics of Complex Target from Solar Irradiance and Sky-Ground Background Radiance in Infrared Spectrum
Authors: Guo Xing , Wu Zhen Sen , Ling Hu Long Xiang , Yang Yu Feng
Published: September 2012

Scattering characteristic of complex target from the solar irradiance and sky-ground background radiance plays an important role in both theoretical researches and practical engineering. The solar irradiance and sky-ground background radiance and scattering property are discussed in this paper. BRDF (Bidirectional Reflectance Distributional Function) relates incident irradiance with scattering radiance while LRCS (Laser Radar Cross Section) shows the scattering characteristic of complex target. By using KA (Kirchhoff Approximation) method, we calculate the LCRS of facet of target and then get BRDF of each facet. Then all the visible faces are added up. Due to the complexity of the atmosphere model, MODTRAN is used to calculate the solar irradiance and background radiance. Finally, to give an example, a model airplane is taken for instance. The results indicate the effectiveness of the method we proposed.
Scattering of Two-Dimensional Sea Surface at Low Grazing Angles with Physical Optics Method
Authors: Chen Zhuo , Wu Zhen Sen , Zhang Yong , Xue Jun Jing , Ye Wen Hua
Published: September 2012

As the classic analytical methods cannot calculate the electromagnetic scattering characteristics at Low Grazing Angle (LGA), a novel numerical method is presented by utilizing the Radar Cross Section (RCS) of the low grazing two-dimensional PM sea spectrum based on the triangles-based Physical Optics (PO) method in this paper. The calculated RCS is compared with the numerical calculation method of different targets and frequencies of incident wave. The results show that PO method is more accurate, especially under LGA condition, and it has a better agreement with the results calculated by commercial software FEKO.
Study on Optical Performance Monitoring for Fiber-Optical Link Utilizing Chaos Theory
Authors: Fan Qing Qing , Li He , Yin Hong Xi
Published: September 2012

Optical-link performance monitoring (OLPM) plays a crucial role in ensuring the link performance, the channel assignment and the network reconfiguration in the high-speed and WDM optical networks. An OLPM scheme based on the chaos theory and the pattern recognition is proposed in this paper. The identification results of nonlinear regimes of 4/8/16-channel WDM links with 10 Gb/s are demonstrated through utilizing the maximum Lyapunov exponent, the recurrence plot and the two-layer perceptron.
Research on the Speed Optimization of Laser Marking
Authors: Yu Qi Wei , Wang Dong Yun , Yu Jie
Published: September 2012

In the production line with marking process, the laser marking speed can't meet the requirements of the high-speed. In order to solve this problem，the affecting factors for the speed of laser marking are analyzed. Combined with experiments，a new algorithm based on the vector trajectory optimization of the marking information is proposed. The new algorithm changes the traditional vector trajectory method which is from left to right and from top to the bottom to a new restructuring trajectory. Experiments show that the method can improve marking speed effectively.