bluuebunny/crossref_metadata_2025 huggingface dataset:
Research on the Starting Characteristics of the Linear Engine System Using the Eccentric-Slider Starting System
Authors: Yin Zhao Lei , Wang Zhe , Li Hui Cong , Deng Jun , Zhang Tong
Published: March 2013

A unique linear engine system is designed independently using eccentric-slider starting system which has been simulated and optimized. Based on the linear engine prototype, the no-load experiment and normal starting experiment are conducted in order to validate the practicality of the eccentric-slider starting system and research the starting characteristics of the linear engine system. The results show that the linear engine can operate smoothly with the starting system under the control logic based on piston displacement and engine frequency. Meanwhile the top cylinder pressure is 1.0MPa in compression process and the engine speed increase continuously with the peak combustion cylinder pressure above 2.0MPa in the normal starting experiment.
Design and Optimization of Electromagnetic Structures for Linear ISG Used in Range-Extended Electric Vehicle
Authors: Wang Zhe , Sun Chen Le , Yin Zhao Lei , Deng Jun , Zhang Tong
Published: March 2013

According to the operating requirements of the linear range-extender used in range-extended electric vehicle, as well as structures and performances of the self-developed linear engine, a tubular permanent magnet (PM) linear ISG is designed. The impact of varying electromagnetic structure on the performance is studied by finite element analysis (FEA) in electromagnetic field. On that basis, optimum structural parameters for the linear ISG are determined using multi-objective optimization. The results show that the self-designed linear ISG can meet the performance requirements. After optimization, the output power increases 8.7 percent; the no-load induced electromotive force increases 12.1 percent; the standard deviation of detent force shows a 94.6 percent reduction; the efficiency basically remains constant.
A Low-Cost Stewart Platform for a Radio Telescope
Authors: van Vuuren Frank Janse , Kim Yoon Soo , Schreve Kristiaan
Published: March 2013

Most hexapods that are currently available on the market are expensive and have extremely high positional and orientation accuracies. Although the positional accuracy is high the viewing angle is limited to 60°. These hexapods are designed with a small viewing angle, as they are not optimised for radio telescopes. The aim of this work is to highlight the various factors that should be considered during the design of a 6-3 Stewart platform for pointing applications. These factors are illustrated by presenting the case study of a small custom hexapod that is designed, built and tested. Modelling of the Platform is performed through the implementation of existing kinematic and dynamic models that could be verified through comparison to simulation results in literature. Components designed for the hexapod include the linear drives, base joints, platform joints, electronic controller and graphical user interface. The design process is documented and design decisions clearly motivated. Performance of the Stewart platform is measured with an inclinometer and the ability of the platform to track a sun simulation path is presented. Specifications which the hexapod is able to achieve include a viewing angle of 120˚±0.3˚ and the ability to carry a payload of 1kg.
Electro-Mechanical Maximum Power Point Tracking of Photovoltaic System
Authors: Holtzhausen David , Kim Yoon Soo
Published: March 2013

This paper is concerned with optimisation of the power produced by a photovoltaic (PV) panel through designing, building and implementing maximum power point tracking (MPPT). In the literature, the MPPT has been normally approached either electronically (using a DC-to-DC converter) or mechanically (controlling the orientation of a PV panel). In this paper, these two approaches are combined to yield more power. To this end, for a given PV panel (available at the first author’s institution) which is already equipped with a mechanical tracking device, a Buck (DC-to-DC) converter is designed to improve the power saving which could be achieved by the mechanical tracking alone. Also, new electronic and mechanical MPPT methods are developed, and their combination, so-called electro-mechanical MPPT, is tested in a real environment to verify its usefulness.
Implementation of a High-Precision Ultrasonic Rain Gauge
Authors: Xu Zhan Wei , Zheng Gui Lin
Published: March 2013

A novel rain gauge based on acoustic self-calibration principle is proposed in the paper. Acoustic self-calibration principle can eliminate the uncertainty of the velocity of ultrasound and achieve accurate measurement of rainfall. The rain gauge not only overcomes the influence on the rainfall measurement under intensive rainfall conditions, but also improves the precision of rain gauge. Plenty of experiments have been done to validate the design. Both theoretical analysis and experimental results show the effectiveness of the rain gauge. A full description of the rain gauge and implementation are presented.
Exquisite Design of a CCD Analog Front End Module
Authors: Huang Wen Tzeng , Hung Chao Nan , Yu Yao Ming , Wu Qing Han , Tuan Chiu Ching
Published: March 2013

One of the key technologies for high-resolution camera is the analog front end (AFE) design, which is between the lens and image system process (ISP). The 2 major evaluations of AFE are to evaluate the noise and the ratio between the RGB pixels. Hence, based on the charge coupled device (CCD) image sensor, we present our proposed AFE design to evaluate the CCD noise of the output image with a lower dark current. Our proposed AFE board design is to employee the 1080p (1920×1080) CCD image sensor and its corresponding timing controller with the digital-analog converter (ADC). Our results indicate that our design has the high performance among 6 different digital brands in the low noise applications. Moreover, the CCD sensors with the different resolutions can be installed within the same socket of our AFE board, which can also simultaneously support 3 types, Bayer, Truesense, and Black/White, color filter array.
Approximate Analytical Solutions of the Pull-In Behavior of an Electrostatically Actuated Clamped-Clamped Micro-Beam
Authors: Kong Sheng Li
Published: March 2013

For the deformation problem of electrostatically actuated clamped-clamped micro-beams, pull-in behaviors of the micro-beams have been analyzed by using Rayleigh-Ritz method. Approximate analytical expressions for pull-in voltage and normalized pull-in displacement of the micro-beam have been obtained. When the pull-in occurs, the pull-in voltage and normalized pull-in displacement of the micro-beam at the mid-span position are 38.6V and 0.398, respectively. The results show that the approximate analytical solution possesses high accuracy.
Development of Hydraulic Oil-Fired Deicing System for Aircraft Deicing Vehicle
Authors: Deng Ke , Wang Jin Lin
Published: March 2013

In winter, aircraft icing or frost is serious potential accident for flight safety which needs equipment to deice. However, until now, there have been no relevant manufacturing enterprise and technology at home. According to design requirements of aircraft deicing vehicle and firing boiler, through comparative analyses of various designs at home and abroad, operating scheme and key devices of deicing system were designed, including deicing firing boiler and hydraulic burner system. Finally a hydraulic oil-fired deicing system suitable for aircraft deicing vehicle was developed successfully. New deicing system and firing boiler have the advantages of reasonable design, reliable working, economic usefulness and convenient operation, which meet the design requirements and fill in the domestic blank. The products not only can be applied in domestic airports but also in civil fields, being of important innovative and practical significance.
Vision Sensor Application for Intelligent Polishing Robotic Cell
Authors: Zamri Ruzaidi , Ismail Napsiah Binti , Baharudin B.T. Hang Tuah , Ariff Azmah Hanim Mohamed , Prabuwono Anton Satria
Published: March 2013

Robotics especially on polishing process has not been exploited successfully in manufacturing, despite tremendous research efforts and potential needs in industries. There is still much concern on how robots are used in industries and stumbling blocks in the deployment of technology. In this study, the techniques to alleviate difficulties in using robots and deploying advanced technologies in the real manufacturing environment will be developed. However, the mirror polishing process still depends on human expert, compared to CNC and CAD/CAM technology. On top of that, undesirable working condition exists due to dust and noise. Next, it is quite difficult to find skilled technicians where existing industrial robot (normally with repetitive accuracy of 0.1mm) not suitable for mirror polishing task requirement (10nm). This study addresses idea to develop and automate the polishing process by using robots. It applies specifically on flat steel surfaces and the image of the workpiece is captured by vision sensor. The image captured is extracted to develop ANFIS (Adaptive Neuro Fuzzy Inference System) to determine the roughness so that correct polishing parameter will be applied on the surface of the workpiece when polishing is done. ANFIS is well suited to the management of uncertainty, is introduced to address the uncertainty problem associated with surface roughness.
Highway Mechanical and Electrical Engineering Quality Evaluation Methods Discussion
Authors: Liu Yu Xin , Jia Xu
Published: March 2013

The project quality evaluation is a significant part of highway electrical and mechanical engineering detection. This paper analyses the evaluation methods of existing engineering quality from the application practice aspects, and then puts forward optimization methods of various evaluation units, finally discusses improvement of scoring scheme.
Architecture Design and Realization for Virtual Manufacturing Oriented CAPP System
Authors: Sui Xiu Lin , Wang Qing , Yang Ru , Wang Qian
Published: March 2013

In order to realize high efficiency and high integration of the virtual manufacturing system and strengthen the integration of CAD/CAPP/CAM, the paper presents the architecture of virtual manufacturing oriented CAPP system and its realizing method. The method of parts information input is used for the system to connect with CAD directly. The system utilizes object-oriented knowledge representation method and database technology, establishes process knowledge database and carries on the effective management. Using the idea of modular, the virtual processing information can be fed back to design system in real-time, the process can be optimized it and form a closed loop CAPP system by using genetic algorithm. The virtual manufacturing technology of CAPP system enhances the design level and quality and improves the flexibility, scalability and dynamic adaptability of CAPP system.
Research on Real-Time Vision Detection Method for Sanitary Labels
Authors: Luo Chao , Song Le , Zhao Mei Rong , Lin Yu Chi , Li Jian
Published: March 2013

Taking diaper which is a representative production of sanitary supplies as an example, a real-time detection method for diaper label based on machine vision is developed. To identify the location of diaper surface label position rapidly, a visual inspection system platform applies to production line is built. Images are captured with high-resolution colorful CCD industrial camera and NC template matching method is adopted as the surface label detection algorithm. Meanwhile, the comparative experiments results among NC, ABS method and Moment Matching method are presented. Experimental results show that this label detection system can realize accurate identification on the condition of different light, whose recognition rate can reach up to 97% and detection algorithm is of preferable instantaneity and stability.
Comparison of the On-Line Power Detection and Prediction System
Authors: Guo J. Hung , Su Kuo Lan , Liao Yi Lin
Published: March 2013

The article presents a power detection and prediction system (PDPS) using fusion algorithms to be applied in the on-line power monitoring of the target device. The system contains multiple power detection units, a data integration unit, a target device, a power source and a main controller. Each power detection unit measures the assigned power source on real-time, and uses four current sensors to measure the current variety. We use fusion algorithms to be applied in current and voltage detection. We can calculate the real-time power values according to the estimated values of current and voltage measurement values. The main controller predicts the power loading for each power detection unit using auto-regression algorithm, and calculates the error value between the prediction value and the measurement value for each detection value, and compares the relation value on various condition.
Structural Optimization of MEMS-Based Hydrophones with Perforated Active Membrane
Authors: Chang Shun Hsyung , Zhilyaev Igor , Shevtsova Maria , Wu Ping Chen , Cheng Yuang Tung , Wu Jiing Kae
Published: March 2013

This paper presents some results of finite element (FE) analysis performed for membrane-type piezoceramic transducer for underwater acoustics applications. We studied the miniaturized sensor with perforated holes in the active PZT membrane, intermediate, and protective plates. In this investigation an influence of the polyimide plate viscous damping, the membranes dimensions and the relative area of the perforated holes on the frequency response of sensitivity was studied for the broadening and flattening the operating frequency band. An optimization of these key parameters using the genetic algorithm working with the device’s FE model was demonstrated.
Fault Diagnosis Method of Time Domain and Time-Frequency Domain Based on Information Fusion
Authors: Zhao Jiang , Wang Jiao , Shang Meng
Published: March 2013

On account of the problem that traditional pipe leakage diagnosis method is not highly accuracy .this paper come up with a method that based on pipe leakage diagnosis method of neural network information fusion. Giving the stress wave time domain feature extraction index data algorithm and wavelet packet extraction each the frequency band energy algorithm, by comparing with these results of the pressure wave time domain feature index data, time-frequency extraction energy values and fault diagnosis of both information fusion ,which show the neural network information fusion method that is used for pipe leakage diagnosis that is feasible and effective.
Identification of Precision Positioning Stage Based on ARX Model
Authors: Wang Jing Shu , Feng Ming Chi , Zhu Chang An
Published: March 2013

In order to realize the characteristics of the positioning stage, the system identification has been developed. The location data has been interpolated and normalized so as to improve the accuracy of system identification. After data preprocessing, the identification based on ARX model and the least square method has been carried out. The results indicate that the ARX model is appropriate to describe the characteristics of positioning system.
Hydraulic Balance Optimization Calculation and Experimental Research on Model of Fluid Network System
Authors: Lu Chen Yin , Ma Jian Feng , Wang Xiao Hua , Shen Xin Rong
Published: March 2013

By using the fluid network installed flow control valves as the research object, we establish fluid network system resistance model and calculate the hydraulic balance optimal operation by using the linear programming optimization method and characteristic curve fitting of pump. In a specially designed structure of the experimental platform, the feasibility and accuracy of hydraulic balance are tested and verified. Calculation and experimental results show that fluid network system is optimized by the linear programming. The flow control valve combined with pump frequency conversion technology have good effect on energy saving.
The Supplier Management Problems and Analyses of The Mechatronic Manufacturing Enterprises
Authors: Tan Ju Hua , Zeng Wei
Published: March 2013

Supplying chain management is nowadays the theoretical basis of operating an enterprise and the basic management method. Supplying chain management actually is new rising horizontal integration management concept. This article, in the background of the industry characteristic of modern mechatronic manufacturing enterprises, and also with the combination of the general management train of thought and author’s practice, expounds the general laws and methods of the supplier management of the mechatronic manufacturing enterprises under the environment of the supplying chain management, and have had deep analysis of the common problems of the supplier management of the mechatronic manufacturing enterprises.
Optimization of Flapper Compliant Mechanism Using Fuzzy Logic Combined Taguchi Method
Authors: Dao Thanh Phong , Huang Shyh Chour
Published: March 2013

This paper focuses on the application of fuzzy logic-based Taguchi method for multi-objective optimization in compliant flapper mechanism. The input parameters such as input torque and crank angular are optimized with considerations of the multiple performance measures as angular displacement and stress of flexible segment. The results revealed that the input torque at level 1 of 2 Nm and crank angular at level 2 of 90 degree are favorable parameters for compliant flapper mechanism. Based on anglysis of variance (ANOVA), the result shown that input torque is the most significant with percent contribution of 89%.
Research on Wavelet Compression and Reconstruction of Wind Turbine Vibration Signal
Authors: Gan Xiao Ye , Huang Zhi Dong
Published: March 2013

The method of wavelet compression and reconstruction is studied. The wind turbine vibration signal is compressed and reconstructed by wavelet transformation. The compression and reconstruction of wind turbine vibration signal are achieved with different wavelet base. The compression ratio and the compression reconstruction accuracy are analyzed. The method and the result facilitate the choice of wavelet base for transmission of wind turbine vibration signal.
A Study of Experimental Method for Mechanical Properties of Solid Propellant under Hydrostatic Compressive Loading
Authors: Zhang Jian Bin , Ju Yu Tao , Zhou Chang Sheng
Published: March 2013

Mechanical behavior of solid propellant material under multi-axial loads has attracted much attention in engineering application. According to the properties of solid propellant material, a kind of triaxial compressive device for solid propellant material was designed by utilizing the operating principle of the soil triaxial compressive device. The structural features and operating principle were expounded, and some notes should be paid attention during tests, and mechanical properties of a kind of double-base propellant material under hydrostatic loading were investigated, and some very meaningful data and conclusions were obtained. The results show that the yield strength and compressive strength of double-base propellant material under hydrostatic loading have obtained more remarkable enhancement than those without the hydrostatic pressure effect. The experimental device and the test results may lay the foundation for further research into a viscoelastic-plastic constitutive model of solid propellant material.
Tool Orientation Planning for Four-Axis CNC Machines
Authors: Lin Tzu Kuan , Lin Alan C.
Published: March 2013

Improper tool orientation planning often causes four typical types of inappropriate four-axis tool paths. They are included: 1. Severe changes of tool orientations occur, 2. Reversions of tool orientations exist, 3. Discontinuous tool paths occur, 4. Gouging. After explore the common methods of the present four-axis machining and their restrictions, the research proposes a hybrid tool orientation planning (HTOP) method to improve the above shortcomings and to get smoother rotary tool paths. An example is done in the last to verify its feasibility.
Using DOProC Method in Structural Reliability Assessment
Authors: Krejsa Martin , Janas Petr , Čajka Radim
Published: March 2013

Reliability of load-carrying structures has been assessed by various calculation procedures based on probability theory and mathematic statistics, which have been becoming more and more popular. The calculation procedures are well-suited for the design of elements in load-carrying structures with the required level of reliability if at least some input parameters are random and contribute to a qualitatively higher level of the reliability assessment and, in turn, higher safety of those who use the buildings and facilities. This paper discusses application of the original and new probabilistic methods – the Direct Optimized Probabilistic Calculation (“DOProC”), which uses a purely numerical approach without any simulation techniques. This provides more accurate solutions to probabilistic tasks, and, in some cases, to considerably faster completion of computations.
Mechanical Property Parameters Prediction of Tube Based on RBF Neural Network
Authors: Jia Mei Hui , Tang Cheng Tong , Liu Jian Hua , Zhang Tian
Published: March 2013

Since it is difficult to predict the mechanical property parameters of tube, the parameter prediction method is proposed, which is based on RBF neural network and tube tensile tests. The stress-strain curves of partial tube are investigated by tensile tests. Then, the sample space of a neural network is established. On this basis, the neural network input parameters and output parameters are determined, and the tube is classified according to the sizes and materials to build a layered neural network model. The comparison of Network prediction and experimental results shows that the RBF neural network can effectively predict the mechanical performance parameters of tube.
Real-Time Monitoring for Vehicle Brake Temperature Rise in Continuous Long Downhill
Authors: Li Wen Liang , Zhou Wei , Gao Li , Chen Ying
Published: March 2013

A real-time monitoring method for brake temperature rise in continuous long downhill with constant velocity braking is proposed. Longitudinal equilibrium equation and energy balance equation are built, and the proportion of brake dissipation energy in total is analyzed. The influence of velocity on brake dissipation energy is studied, then, the calculation model for brake temperature rise is built with the empirical formula of the proportion of bake absorption energy in dissipation energy. Finally, the undetermined coefficient of the calculation model for brake temperature rise is determined with least square method based on test data. The studies show that temperature rise calculated by the built model is similar to the test data both in magnitude and variation trend.
Multi-Physical Analysis of Eddy Current Damper (ECD) for Reaction Force Compensation Device
Authors: Ahn Hyeong Joon , You Y.H. , Kim K.R. , Kwon J.H. , Cho K.J. , Choi D.S.
Published: March 2013

This paper present multi-physical transient analysis of eddy current damper (ECD) for reaction force compensation device. A reaction force compensation mechanism with a movable magnet track and an ECD (or conductor plate) is developed. Lumped model of the ECD is derived and effects of both the location and width of the conductor plate are discussed. Multi-physical transient analysis of ECD is analyzed using commercial finite element software, which is compared with the lumped parameter analysis.
Mobility Deposition Effect of Aerosol Particles in the Boundary Layer
Authors: Chiou Ming Chi , Hsu Wen Zong
Published: March 2013

The particle concentration and convection velocity profile has been obtained by the adaptation of the random surface renewal model to the particle continuity and momentum equations of the nonisothermal turbulence boundary-layer flows In general, the investigations of particle deposition mainly include incompressible fluid laden by spherical and dilute particles in the fully developed turbulence boundary layer flows. This means that the fluid motion is unaffected by the presence of the particles and that the collisions between particles can be neglected. the relative quiescent viscous sublayer, resulting in the increase in thermophoretic deposition with increased Prandtl number.
Study of Thermal Management System for a Series-Parallel Hybrid Electric Vehicle Using Numerical Simulation
Authors: Sun Xiao Xia , Wang Yi Chun , Shao Chun Ming , Wu Yu Feng , Wang Guo Zhu
Published: March 2013

Advanced thermal management system (TMS) has the potential to increase the life of the vehicle’s propulsion, and meanwhile, decrease fuel consumption and pollutant emission. In this paper, an advanced TMS which is suitable for a series-parallel hybrid electric vehicle (SPHEV) is presented. Then a numerical TMS model which can predict the thermal responses of all TMS components and the temperatures of the engine and electric components is developed. By using this model, the thermal response of the TMS over a realistic driving cycle is simulated. The simulation result shows that the TMS can fulfill the heat dissipation requirement of the whole vehicle under different driving conditions. It also demonstrates that a numerical model of TMS for SPHEV is an effective tool to assess design concepts and architectures of the vehicle system during the early stage of system development.
Simulation Research on Motion Law of Arresting Hook during Landing
Authors: Zhu Qi Dan , Meng Xue , Zhang Zhi
Published: March 2013

The key of a safety landing is the arresting hook can engage an arresting wire. Thus, research on motion law of arresting hook during landing is essential. The construction features and function of typical arresting hook installation is studied. Take into consideration the influence on collision process produced by the deck friction in order to build an actual model of arresting hook during landing. So we can use the model to study the motion law of arresting hook during landing for the sake of supplying a beneficial reference to design of arresting hook and successful engagement with an arresting wire. Simulation results show that the value of height of first hook bounce diminishes linearly with increasing values of coefficient of friction and increases linearly with increasing values of sinking speed. Therefore, we should consider the deck friction in an arresting hook collision which is available for designing a reasonable damper and must ensure the value of sinking speed in a reasonable range to satisfy the condition of engagement with arresting gear.
Study on Impact Protection Properties of Titanium Alloy Using Modified SHPB
Authors: Liu Jie , Liu Jin Xu , Ding Hong Sheng , Li Shu Kui , Luo Yu Meng
Published: March 2013

In order to evaluate the impact protection capacity of armor material quantitatively, direct impact testing loaded by modified Hopkinson bar was used to simulate the impaction between penetrator and armor. Protection coefficient k was defined to describe the protective performance. Using the direct impact testing, Ti-6Al-4V specimens with different microstructure and thickness were tested. Results show that k decreases with increased impact velocity and increases with increased thickness of specimen. Under a given loading condition, binary microstructure exhibits the highest k, indicating the best protective performance. Moreover, its k shows the most sensitivity to thickness (mt) and the least sensitivity to impact energy (me), which means that its protective performance can be improved most efficiently by increasing its thickness and it will exhibit good protective performance in a wider impact velocity range. This new method can evaluate the impact protective properties of armor materials efficiently, which may have a broad application prospect.
Optical Properties of Films of Graphite Oxide, Reduced Graphite Oxide and its Intercalated Compounds with Ammonium Dodecahydro-closo-Dodecaborate
Authors: Karpenko Alexander A. , Saldin Vitaly I.
Published: March 2013

The influence of light radiation with different wavelengths (546, 380, 365 nm) on the coatings of oxidized graphite and its intercalated compound with ammonium dodecahydrododecaborate (NH4)2B12H12 was studied. The transmission and absorption spectra of the coatings were measured before and after irradiation. It was shown that the optical density of the coatings increased because of carbon release (blackening), which was especially strong during UV irradiation. Under the same conditions (wavelength, power, time), the change in the optical density was much larger for the intercalated compound than for oxidized graphite. This can be explained by the presence of the anion B12H12 2- in the former. It is not appropriate to refer to graphite oxide or reduced graphite oxide simply as graphene since their properties are substantially different.
Enhanced Photocatalytic Activity of TiO2/Graphene Oxide Nanocomposites Prepared by the Sol-Gel Method
Authors: Cao Chun Hua
Published: March 2013

TiO2/graphene oxide (TiO2/GO) nanocomposites were prepared by the sol-gel method using tetrabutyl titanate and graphite oxide as the main raw materials. The microstructure of TiO2/GO nanocomposites was analyzed by X-ray diffraction and transmission electron microscopy. The results showed that graphene oxide was uniformly covered with sphere-like anatase TiO2 nanoparticles, which had a diameter of about 10 nm. Reactive brilliant red X-3B (X-3B) was used as model pollutant to study the photocatalytic activity of the composites. The effect of key factors on X-3B degradation was investigated. The results indicated that the photocatalytic activity of TiO2/GO nanocomposites was higher than that of pure TiO2 and the mixture of TiO2 and graphite oxide under the same conditions, and the nanocomposites had the best photocatalytic activity, when the content of graphene oxide was 100 mg. Moreover, it was found that the rate of photocatalytic degradation decreased with the increase of the initial dye concentration, and the optimum amount of nanocomposites was 0.8g/L when the initial concentration of X-3B solution was 100 mg/L, and the degradation rate could reach 96% after 60 min irradiation.
Nonlinear Oscillations of Functionally Graded Materials Rectangular Thin Plates with Parametrical and External Excitations
Authors: Bian Xiao Li , Li Shuang Bao
Published: March 2013

Nonlinear oscillations of a simply supported functionally graded materials (FGM) rectangular plate under one-to-one internal resonance are investigated in this paper. The FGM rectangular thin plate is subjected to the transversal and in-plane excitations. Material properties are assumed to be temperature-dependent. Based on the Galerkin’s method, a two-degree-of-freedom nonlinear system with quadratic and cubic nonlinearities governing equations of motions for the FGM rectangular thin plate is derived. The averaged equations are obtained by the method of multiple scales. Numerical simulations illustrate that there exist nonlinear oscillations for the FGM rectangular thin plate.
Thermodynamics Study on the Theophylline-Nicotinamide Cocrystal
Authors: Guo Jing Jing , Dang Le Ping , Wei Hong Yuan
Published: March 2013

In this paper, the theophylline(TP)-nicotinamide(NCT) cocrystal was chosenas an example for studying the preparation analysis-identification and thermodynamic analysis of cocrystal systems. TP-NCT cocrystal was prepared by the methods of grinding, gringding, slurry and evaporation crystallization respectively. The dependence of the cocrystal solubility on the concentration of cocrystal components in solution were measured and correlatedby cocrystal solubility product. The results indicatethatTP and NCT do not ionize or form complexes in ethanol, and with the temperature increasing, both the solubility of theTP-NCTcocrystal and the solubility product increase.Finally, the ternary phasediagrams for the system of TP-NCT-ethanol at (298.15 and 308.15) K, which can provide the theoretical basis forcrystallization processes, are presented.
Influence of Porosity on the Mechanical Properties of Cu/LDPE Porous Composites for Intrauterine Contraceptive Devices
Authors: Ge Man , Xia Xian Ping , Xiao Cheng , Xiao Lian , Cai Shui Zhou
Published: March 2013

As a novel Cu-IUD material, it is necessary for copper/low-density polyethylene (Cu/LDPE) porous composite to have some suitable mechanical properties if it is used to prepare a clinical Cu-IUD with frame. However, it is not clear how the porosity of the porous structure affects the mechanical properties of Cu/LDPE porous composites. Therefore, the influence of the porosity of porous structure on the mechanical properties of Cu/LDPE porous composites is investigated in the present paper. The results show that the porosity has significant effects on the mechanical properties of Cu/LDPE porous composites. The mechanical properties of the Cu/LDPE porous composites decrease with the increasing of porosity, for the effective load area decreases, the chance for occurrence of cracks increases and the crystallinity degree of LDPE matrix increases with the increasing of porosity. These results are very important and they can be applied to guide the design of Cu/LDPE porous composite IUD for use in the future clinical application.
Time Frequency Analysis of Femoral Doppler Ultrasound Signals by AR Modelling
Authors: Mahieddine Latfaoui , Fethi Bereksi Reguig
Published: March 2013

In this study, we have compared the efficiency of the short time Fourier transform (STFT) and autoregressive modelling (AR) and autoregressive moving average (ARMA) of the femoral Doppler artery ultrasonic signals, in order to determine the spectral broadening index (SBI). Our aim is to detect the impact of the two modelling approaches on sonograms and of power spectral density- frequency diagrams obtained from femoral arterial Doppler Signals. The sonograms have been then used to compare the methods in terms of their frequency resolution and effects in determining the stenosis of femoral artery. In this paper we have used generated frequency envelopes from the Doppler spectrum to determine an index showing the degree of severity of stenosis cases. This index called broadening spectral index is calculated for various real cases.
Mechanical and Electrical Products Reliability Estimation under Weibull Distribution Based on Accelerated Life Test
Authors: Wan Bo , Fu Gui Cui , Wang Li
Published: March 2013

In practice, most mechanical and electrical products life obeys Weibull distribution.This paper based on the relationship between Weibull distribution and exponential distribution, improved the point estimate of characteristic life during the normal stress and enhanced the precision of analysis. The point estimate of the shape parameter under normal stress level was presented, when the assumption that the shape parameter under different stress levels keeps invariable was got rid of. Meanwhile, a means was put forward to give interval estimation of the Weibull distribution parameter and the lower confidence limit of the reliability. Finally, an example of the mechanical and electrical product’s constant-stress accelerated life test was given and proved that the proposed approach is accuracy. It should be valuable for implement of engineering.
The Utilization of Heat Pipe on Cold Surface of Thermoelectric with Low-Temperature Waste Heat
Authors: Djafar Zuryati , Putra Nandy , Koestoer Raldi A.
Published: March 2013

Thermoelectric (TE) modules are a thermo-element device that can harness the heat and convert it into electrical energy. As an electrical generator system, TE has several advantages i.e not noisy, easy maintenance, relatively small, lightweight and environmentally friendly because it does not produce pollution. In this paper, the research about the performance of TE modules that used for electric generator has been done. TE modules utilize low temperature waste-heat from a solar cell that simulated with a combination of a bulb and a collector plate. TE modules which tested are single and double modules, in which for double modules, connectivity Thermal-Series was used. Parameters of performance such as output power generated are determined by measuring the temperatures difference and the voltages difference at the test module as well as using several equations. The results show that the distance of heat source and load applied will greatly affect the performance of thermoelectric generator (TEG) modules. The results showed that the number of modules and loading will greatly affect the performance of TEG modules. The use of heat pipes generate a far greater power 4-6 times on the single TE Module (0.84 mW) than without heat pipe (0.14 mW), and a double TE modules that uses heat pipe will became 4 times larger (1.48mW) than without heat pipe (0.37mW).
Study on the Electromechanical Coupling Performance of Bimorph Piezoelectric Cantilever
Authors: Zhang Kai , Wang De Shi , Zhou Qi Zheng
Published: March 2013

In order to accurately predict the electromechanical coupling performance of bimorph piezoelectric cantilever structure. Based on Euler-Bernoulli beam assumption, the expression of output voltage response of the bimorph piezoelectric cantilever is written, the output voltage curve of unit acceleration excitation are obtained, the law of the output voltage influenced by the structure parameters of the cantilever beam length, width and thickness of the metal beam and the piezoelectric layer are analyzed, the results will play an important theoretical and engineering significance in the development of high efficient piezoelectric energy harvesting device.
A Methodology for Systematic Geometric Error Compensation in Integrated Inspection and Machining
Authors: Jiang Yong Jun
Published: March 2013

Evaluation of form errors of machined parts is fundamental in quality inspection to verify their conformance to the expected tolerances. Performance of methods have been reviewed in [1].A methodology for maximizing the adherence to the specified tolerances using an integrated machining and inspection system is presented. Considering thedesired tolerance envelope of the part, an error decomposition technique is developed to model machining errors caused by the systematic and non-systematic errors in the machine tool. The model is used to adaptively plan the final machining cuts, based on inspection feedback, to enhance the geometric accuracy of the final product and is illustrated by an example.
Feature Size Measurement of Multihole Sheet Metal Part Based on HALCON
Authors: Han Baoan , Xiang Hui Yu , Li Zhe , Zhou Xiao Zhuang
Published: March 2013

To realize the target of having a precise feature size measurement of multihole sheet metal part, this paper based on HALCON, first calibrates the camera with HALCON's calibration assistant. After acquiring the image of the multihole sheet metal part, the image coordinates of the center of fitting ellipse and the length of the long and short half shaft (pixel unit) can be gotten by proceeding a series of operations like thresholding, subpixel-precise contour extraction, fitting ellipses and so on. At last, the point coordinates in image are transformed into the plane Z=0 of the world coordinate system through translation and rotation, and the value of each feature size of the sheet metal part can be calculated.
Based on Static Interval Finite Element Method of Analysis of Rigid Frame Structure
Authors: Li Yan , Han Xiao Wei , Dong Wen Yang
Published: March 2013

In the framework of the actual structure of projects and inevitably there are some uncertainties. Interval finite element method can effectively function to define the scope and provide a strict mathematical sense, the results of the calculations, and finite element method for interval data can be expressed uncertainty. In this paper, the theoretical calculation of interval finite element of a layer rigid frame structure, compared the simulation results with the combination of ANSYS modeling, Numerical analysis of examples from the results of the theoretical value and the true value of the error between the results of a very small can be proved that the interval finite element theory and method for frame structures is very applicable.
Additional Aging Effect after Carbonation Process of Fly Ash Based Eco-Materials
Authors: Kim Yoo Taek , Park Jun Young
Published: March 2013

The purpose of this study is to enhance the mechanical strength of specimens containing fly ash from fluidized bed type boiler, which the recycling rate will be eventually increased. Specimens containing fly ash in a certain portion were made and aged for 3, 14, and 21 days. The carbonation process under the super critical condition was performed to enhance the mechanical property of specimens by filling the voids and cracks existing inside cement specimen with CaCO3 reactants. The additional aging effect after the supercritical carbonation process on mechanical strength of specimens was also investigated by comparing the compressive strength with and without 7 day extra aging. Carbonation under the supercritical condition and additional 7 day aging was very effective for enhancement of mechanical strength and compressive strength increased by 44%, which reached up to 88MPa.
Prediction of the Slagging Characteristics of Coal Ash Based on Symmetric Fuzzy Cross Entropy and Vague Sets
Authors: Wen Xiao Qiang
Published: March 2013

A prediction model was built to predict the slagging characteristics of coal ash based on the theory of symmetric fuzzy cross entropy and vague sets. Softening temperature, SiO2-Al2O3 ratio, Alkali-acid ratio, silicon percentage of value were selected as input vectors. Firstly, the vague values of the selected samples were calculated based on vague sets theory, and then the similarity degree was evaluated based on symmetric fuzzy cross entropy. The prediction results prove that the predicting accuracy rate of the new pattern recognition model is 90%. So, the model built here is reasonable and feasible and meets the requirement of engineering.
Numerical Analysis on the Influence of the Unsteady Effect upon the Flow Characteristics in a Human Airway
Authors: Sung Kun Hyuk , Ryou Hong Sun
Published: March 2013

The focus is on the unsteady effect on the flow characteristics considering the real respiration in a human airway. In order to capture the unsteady effect, the flow characteristics were investigated and compared with that of steady flow by using the computational fluid dynamics technique. The real respiratory flow rate in a light workload was appliedto the inlet of airway. The unsteady effects especially appear when the flow rate accelerates in the inspiratory and the expiratory phase than other times in a breath cycle. The size of the flow recirculation zone, the turbulence fluctuation and the secondary flow intensity decrease because the unsteady effect reduces the strength of jets passing through the constriction of airway by interfering with the flow. These results imply that the unsteady effect should be considered to investigate the flow characteristics and the particle movement in a human airway.
Effect of Pulsed Electron Beam Treatment and Hydrogen on Properties of Zirconium Alloy
Authors: Pushilina N.S. , Stepanova Ekaterina N. , Berezneeva E.V. , Lider A.M. , Chernov Ivan P. , Ivanova S.V.
Published: March 2013

The paper presents the results of the pulsed beam effect on the structure and phase composition of zirconium alloy. Such treatment is demonstrated to lead to forming of complex morphology martensite in the surface layer of the alloy. The processes of hydrogen absorption by zirconium alloy with modified surface have been studied. Modification of the samples is found to reduce the amount of hydrogen, absorbed by the volume of zirconium alloy during hydrogenation.
Performances Analyzing of Parallel Inverter System Based on an Improved Fuzzy Control Method
Authors: Wang Hui Ling , Wang Jun , Wang Ming Qing , Cui Xiao Rong , Lin Li , Sun Zhang
Published: March 2013

The parallel inverter system will produce the phenomenon of circulating current when each inverter’s output voltage is inconsistent. This phenomenon increases the burden of switching elements. Furthermore this system will be crashed, and it could lead to a power interruption. In this paper, the property of the circulating current is analyzed deeply for double-loop parallel inverter system. An improved fuzzy PID control and LCL filter are adapted to make up the really redundancy system. Besides, a hot-swappable system is putted into practice. The simulation results reflect that this method have better inhibitory effect on the circulating current of the parallel inverter system.
Building Cyberinfrastructure for Data Management and Sensor Control in Ocean Observation
Authors: Li Xiu , Jin Ming , Liu Zhao Yang , Huang Rong Sheng , Guo Zhen Hua
Published: March 2013

Today, in order to enrich economic and scientific research value, sensor network and its data management system have been widely used in ocean observing and in real-time continuous data collecting. In this article, the risks associated with modeling, assessing, managing, and communicating of observing systems are taken into consideration, a cyberinfrastructure architecture is designed to ensure the global observation networks real-time, integrated network research and mass data analysis, with its base station communications, satellites and cables to transfer data, using distributed computing platform for real-time analysis of mass data of worldwide sensors to obtain the new progress of research topic and provide disaster warning. This is important to allow researchers study collaboratively with other researchers as if in their laboratories, also cause the public to further contact with sea world, and widen the public education road.
Development of an Omnidirectional AGV with Global Localization System
Authors: Leng Chun Tao , Du Jian Jun , Cao Qi Xin , Zhu Xiao Xiao , Huang Zhen
Published: March 2013

In order to work in the narrow work space and achieve global localization, an omnidirectional AGV(Automatic Guided Vehicle) is developed. First, thearchitecture of the omnidirectional AGVwith mecanum wheels is designed to meet the motion requirement. The global localization system with accelerometer and vision sensor is introduced. The experiments show that the developed robot is able to work in workshop environment, and the global localizationsystem proved to be feasible.
Structure and Properties of Zirconium Alloy after Modification by Pulse Ion Beam
Authors: Berezneeva E.V. , Pushilina N.S. , Berezneev D.V. , Chernov I.P. , Lider A.M. , Kreoning M.
Published: March 2013

Experimental results on the impact of pulsed ion beam with parameters the pulse duration 80 ns, energy of 200 keV and current density 120 А/сm2 , pulse energy ~ 1,5 J/сm2 on the alloy Zr1Nb on structure – phase state of the alloy of zirconium Zr1Nb. It is shown that such irradiation leads to changes in the structure of the surface and the hardening of the material.
Study on Reconstruction of EMP Signal Induced by Corona Discharge
Authors: An Ting , Jiang Xue Hua
Published: March 2013

In order to provide theoretical basis for studying the corona discharge problem deeply, this paper analyzed advantages and disadvantages of the wavelet method and the spatial and temporal method based on empirical mode decomposition (EMD). It combined the threshold technique of wavelet method and the EMD technique of spatial and temporal processing method, and then proposed the threshold processing method based on EMD. The paper used the three methods to analyze a simulated signal of corona discharge polluted by white noise, the results show that the signal-noise ratio of the paper’s method is biggest and the root mean square error of the paper’s method is smallest. It proves de-noising effects of the paper’s method are better than the other two methods. In the end, the paper reconstructed corona discharge signal submerged in strong background noise from actual corona discharge by the paper’s method, it proves the method can extract small signal from complex background noise.