bluuebunny/crossref_metadata_2025 huggingface dataset:
Multiple Response Optimization with Grey Relational Analysis of Friction Stir Welding Parameters in Joining Dissimilar Aluminium Alloys by Taguchi Method
Authors: Ravikumar S. , Rao V. Seshagiri , Pranesh V.
Published: July 2014

This paper presents a novel approach for the optimization of welding parameters on dissimilar friction stir welded joints between AA6061T-651 and AA7075T-651 aluminium alloys with multiple responses based on orthogonal array by grey relational analysis. Experiments are conducted by varying the welding parameters related to three pin profiles. In this study, welding parameters namely rotational speed, welding speed and pin profiles are optimized with the considerations of multi responses such as ultimate tensile strength and hardness. A grey relational grade is obtained from the grey analysis. Based on the grey relational grade, optimum levels of parameters have been identified and significant contribution of parameters is determined by ANOVA (Analysis of Variance). Confirmation test is conducted to validate the test result. Experimental results have shown that the responses in welding process can be improved effectively through this novel approach.
Neural Network Based Buckling Strength Prediction of Laminated Composite Plate with Central Cutout
Authors: Nicholas P. Emmanuel , Padmanaban K.P. , Vasudevan D. , Selvaraj I. Joseph
Published: July 2014

Laminated composite plates are greatly used in many applications where high specific strength and stiffness are mandatory. These structures may have holes in order to accommodate windows and doors if it is used for air craft structures or to provide cables and inspection system if it is used in the applications like power transmission systems and automobiles. The laminated composite plates with holes shall be analyzed using finite element analysis. It is necessary to optimize the parameters like thickness, fiber orientation, material and the stacking sequence to obtain the desired characteristics for these structures. But using finite element analysis makes the process more tedious job. With this in mind it is proposed here to construct the artificial neural network to predict the buckling behavior of the composite plate.
Synthesis and Characterization of Ti-TiB Composites Processed through Vacuum Sintering
Authors: Kumar M. Selva , Chandrasekar P. , Ravisankar Balasubramanian , Mohanraj M.
Published: July 2014

In the present work, an attempt has been made to explore the general microstructural characteristics and mechanical properties of titanium-titanium boride (Ti-TiB) composites (20 and 40 vol.% TiB reinforcement in Ti matrix) processed by Vacuum Sintering. The microstructures of the composites were investigated using electron probe micro analysis, scanning electron microscopy and X-ray diffraction. Obviously, the elastic modulus, shear modulus and hardness are found to increase with increase in volume fraction of titanium boride. The effects of titanium boride reinforcements on elastic properties and microhardness are discussed.
Investigation of Porosity Relationship in Additive Manufactured Novel Bone Scaffold
Authors: Arul Kishore A. , Rashia Begum S. , Arumaikkannu G.
Published: July 2014

Additive manufacturing (AM) is one the advanced process for building up a component layer by layer, with one layer of material was bonded to the previously laid layer using a 3D design data. In the field of medical science AM is very much useful in the development of Bone Scaffolds. The bone scaffold needs the good level of porosity for the cultivation of cells. In this work, an algorithm for a novel structure with the theme of flexible porosity was introduced. Scaffold models were developed using CATIA V5 for four different porosities. The novel structures made of Poly Amide (PA 2200) material were fabricated using a commercially available Selective Laser Sintering machine (SLS). The differences in scaffold theoretical and experimental porosities were investigated and the percentage of error was discussed.
Improving Surface Hardness of Mild Steel Plates by Addition of Silicon Carbide Using Gas Tungsten Arc as Heat Source
Authors: Reddy G. Harish , Arul Sanjivi , Sellamuthu R.
Published: July 2014

An attempt has been made to improve the surface hardness property of mild steel by developing a composite layer on the surface of mild steel using gas tungsten arc as heat source. Silicon Carbide was placed on the surface using a binder and heat was applied using gas tungsten arc. Variation of Silicon content with the weld current parameters was studied. The variation of microhardness with Silicon content on the surface was studied. Optimum parameter for attaining maximum surface hardness property using GTAW (Gas Tungsten Arc Welding) has been found.
Buckling Analysis of Symmetric Cross-Ply Laminated Annular Plates with Carbon Nanotubes
Authors: Kumar Pankaj , Ramesh Pandey
Published: July 2014

The Paper presents the buckling response of composite annular plates with under uniform internal and external radial edge loads using energy method. For the equation of stability Trefftez rule is used. The paper consists of buckling behavior of laminate (90/0) s, influence of some parameters such as thickness, boundary condition, aspect ratio on buckling loads and modes are investigated. Present results are compared with other papers. In this paper the effect of % weight of carbon nanotube (MWCNT) on the buckling load is also investigated.
Energy Efficient Hybrid Nanofluids for Tubular Cooling Applications
Authors: Madhesh Devasenan , Kalaiselvam S.
Published: July 2014

Analysis of heat transfer behaviour of hybrid nanofluid (HyNF) flow through the tubular heat exchanger was experimentally investigated. In this analysis the effects of thermal characteristics of forced convection, Nusselt number, Peclet number, and overall heat transfer coefficient were investigated.The nanofluid was prepared by dispersing the copper-titania hybrid nanocomposite (HyNC) in the water. The experiments were performed for various nanoparticle volume concentrations addition in the base fluid from the range of 0.1% to 1.0%. The experimental results show that the overall heat transfer coefficient was found to increases maximum by 30.4%, up to 0.7% volume concentration of HyNC.
Experimental Investigation of Static and Dynamic Characteristics of Multiwall Carbon Nanotubes Reinforced Polypropylene
Authors: Gajbhiye Sachin O. , Singh Satinder P.
Published: July 2014

The change in static and dynamic characteristics of polypropylene (PP) of grade H110MA by adding 2% multi walled carbon nanotubes (MWCNT) was investigated experimentally in this paper. The nanocomposite material is prepared by mixing neat PP and MWCNT in an extruder in a specified proportion. The extruded material is then used in an injection molding machine to make tensile test and impact test specimen. Tensile test specimen is tested on universal testing machine (UTM) to check the Young’s modulus of nanocomposite material. The impact test specimen is used to find the dynamic characteristics of this material by using the technique of experimental modal analysis using Single point Laser Doppler Vibrometer (SLDV), modal hammer and FFT analyzer. The scanning electron microscopic (SEM) images were taken to check the orientation and dispersion of carbon nanotubes in polypropylene.
Heat Transfer Enhancement by Using Nanofluids in Heat Pipe - A Review
Authors: Kusure Balasao D. , Warkhedkar R.M. , Harde Pravin R. , Shirke P.K.
Published: July 2014

Nanofluid is nanomaterial suspended in base fluid. Nanoparticle enhances various properties of base fluid mainly heat transfer characteristics. Also sometime nanoblends means hybrid nanofluid is used. This article mainly states how nanofluids are formed from nanoparticle and there types. This paper reviews and summaries the recent work in experimental and theoretical heat transfer characteristic of nanofluid as well as nanoblends and it is helpful in identifying the nanofluid that can be used in heat pipe for further research.
Investigation on the Machinability Characteristics of MWCNTs Filled Epoxy/Glass Fabric Hybrid Nanocomposite Using Various Drill Bits
Authors: Ponnuvel S. , Moorthy T.V. , Lokachari Siddharth
Published: July 2014

This investigation is to understand the drilling characteristics of multi walled carbon nanotubes (MWCNTs) filled epoxy / glass fabric hybrid polymeric nanocomposite material, which will be influenced by the cutting parameters (Cutting speed and Feed rate) and various drill geometries. This test specimen was subjected to drilling tests with two drills of different tool geometries (HSS twist drill and HSS split point drill). Diameter of both drills was 7.14 mm. By measuring delamination at the entrance and exit sides of the drilled holes, as desired outputs, the drilling process is optimised using grey relational analysis. Based on grey relational grades, best and worst performances were noticed with HSS twist drill and HSS split point drill respectively. We also observed that the average of grey relational grades with HSS twist drill is slightly better than that of HSS split point drill.
A Laboratory Working Model on Steer by Wire System
Authors: Joseph Kenned Jack , Patil V.R.
Published: July 2014

I propose to design and test a steer-by-wire system will demonstrate that the physical connection between the steering wheel and the wheels of a car which can be eliminated in favor of a more robust system that allows for easy modifications. The system will mimic regular power steering and the driver will feel no difficulty in adjusting to the new system and yet will benefit from the many advantages of the system. Today’s automobiles benefit more and more from the vast applications of electronic systems. The integration of a steer-by-wire system can enhance these systems notably to a wide range. In particular, the handling and the safety of the cars can be improved significantly. Since a steer-by-wire system is easily modifiable, different drivers will be able to adjust the system to accommodate their styles and this will enhance easy handling. In addition, disabled people and the elderly will benefit immensely from steer-by-wire because they will be able to situate the steering wheel to meet special needs. Traction control systems are very closely tied with driving safety and they can be enhanced with steer-by-wire vastly [3]. For instance, if the car starts sliding and the driver loses control of the car, driven off the steering into the wrong side, the system could interfere and take over controls. Very sudden changes in steering could also be avoided with such a system. Since there are virtually no physical connections between the steering wheel and the wheels, a steer-by-wire system can be implemented on different cars easily. The steering wheel could be placed on either side of a car (or anywhere else). Both of these improvements would reduce costs of production and allow a wider range of designs eminently.
Analysis of Static Mechanical Behaviour of Metal Bellows Using Finite Element Modeling
Authors: Dinesh Babu P. , Keerthi Prasath S. , Barani Dharan M. , Venkat Raman C. , Narayanan R. , Ganesh K.C.
Published: July 2014

The selection of the optimum expansion joint depends on a technical as well as an economical aspect. The bellows is the basic element of expansion joints. The aim of this research is to perform a Finite Element Analysis (FEA) of metal bellows to investigate its static behavior and validate it with Expansion Joints Manufacturing Association (EJMA) standard. Further a parametric study is used to investigate the meridional stress component on the metal bellows at various temperatures. The result explains that the dimensions of convolution curvature are sensitive to its mechanical behavior. Also the component becomes flexible and peak stresses are reduced at elevated temperature.
Performance Comparison of Rod-Baffle and Segment-Baffle Heat Exchangers Using Numerical Simulations
Authors: Cao Yuan Zhe , Zhu Liu Juan , Shi Yan Hua
Published: July 2014

A comparative study on performances of rod-baffle (RB) and segment-baffle (SB) heat exchangers was carried out by numerical simulations under the same conditions. The results show that the overall heat transfer efficiencies are similar in these two types of heat exchangers with the same heat transfer areas. But RB heat exchangers show more uniform and smooth fluid flow, as well as much lower pressure in the shell side compared to SB counterparts. These detailed characteristics of heat transfer and fluid flow evidence better performances in RB heat exchangers and also provide a deeper insight into design and optimization of shell-and-tube heat exchangers.
Rebound Hammer Tests of Calcium Silicate Bricks – Effects of Internal Compressive Stress on Measurement Results
Authors: Brožovský Jiří
Published: July 2014

The rebound hammers of the Schmidt system belong among the non-destructive testing methods that are used for determining compressive strength of building materials, most often concrete and rocks. Calibration relations between the rebound number and compressive strength must be available to determine the compressive strength. Calibration relations are determined on the basis of destructive and non-destructive tests of test specimens. This paper deals with the effects of internal compressive stress in calcium silicate bricks on measurement results obtained using the L-type Schmidt hammer. Based on the obtained information, in order to process calibration relations, it is recommended to apply such force to the test specimens, which corresponds to the internal compressive stress 10-15% of the final compressive strength. We do not recommend measuring on firmly supported bricks only.
The MMT/MCNTs/sPEEK Nanocomposite Membrane for Proton Exchange Membrane Fuel Cells
Authors: Lu Shao Jie , Liu Xu , Cai Zi Qing , Meng Xiao Yu , Zhou Qiong , Cui Li Shan
Published: July 2014

The montmorillonite (MMT)/multi walled carbon nanotube (MCNTs)/sulfonated polyether ether ketone (sPEEK) nanocomposite membrane were prepared by a method of solution casting for fuel cells application.The MMT and MCNTs were modified with sodium sulfanilateand poly (styrene sulfonic acid) (PSSA), respectively. The proton conductivity of theas-prepared membranes containing 0.5wt.% PSSA grafted MCNTs (PSS-g-MCNTs) and 0.5wt.% sulfonatedmontmorillonite (sMMT) increased by 0.013 Scm−1compared to the plain sPEEK.The tensile strength and yield strength of which increased by 34.37MPa and 34.20MPa relative to the 1.0 wt.% PSS-g-MCNTs loaded sPEEK, which indicated that PSS-g-MCNTs and sMMT may generate a proton conducting cocontinuous networkwithin the SPEEK matrix.
A Novel Wireless Thermal Convection Type Inclinometer by Using Non-Floating Structure
Authors: Lin Jium Ming , Lin Cheng Hung
Published: July 2014

This research proposes a novel wireless RFID-based thermal convection type inclinometer by using non-floating structure without a cavity in the substrate. Four new ideas are presented. The first one is to make the device on a flexible substrate, thus it can save more energy than the traditional silicon. The second one is to integrate both an inclinometer and a wireless RFID antenna on the same substrate, such that it is a wireless device and very convenient for usage. The third idea is to fill xenon gas in the chamber with hemi-spherical or hemi-cylindrical shape instead of the previous one with carbon dioxide and rectangular shape. Because the xenon gas would not produce oxidization effect to the heater, so it would be more reliable. The fourth idea is to use non-floating structure instead of the floating one. The results by using floating structure with xenon and CO2gases are studied the first; but the sensitivity performances are not good. Note that the sensitivities for the proposed non-floating structure by using hemi-spherical chamber filled with xenon and CO2gases are better, and the one of the former is better than the latter by 70%. On the other hand, the response speed (step-input of tilted angle) by using hemi-cylindrical chamber with xenon gas is the quickest, the average response time is 545μs, while the hemi-spherical chamber filled with CO2is the slowest, and the average response time is 748μs.
Continuously Harvesting of a Phytoplankton-Zooplankton System with Holling I Functional Response
Authors: Sun Hai Ting , Tian Yuan
Published: July 2014

In this paper, continuously harvesting of a phytoplankton-zooplankton system with Holling I functional response is proposed and analyzed. Firstly, the existence and stability of equilibria are addressed; the global asymptotical stability of equilibria is investigated by the Lyapunov method. And then, the existence of bionomic equilibria and the optimal harvesting policy are discussed. Finally, the conclusion is given.
Numerical Simulation of Piston Ring Lubrication with Multi-Grade Oil
Authors: Salaheldin A. Mohamad , Zheng Qun , Lu Xi Qun , Guo Yi Bin , Zhu Jing Zhi
Published: July 2014

The present work mainly focuses on study the piston ring lubrication parameters, and the influence of viscosity index improvers onthese parameters. Mathematical model has been developed using average Reynolds equation considering fully flooded inlet condition. The oil characteristics used in the modeling is enhanced by a series of polyacrylates viscosity index improvers, in order to indicate the effect of them on the oil film thickness, friction force, and hydrodynamic power losses. The simulation results help to explain the mechanism of action of viscosity index improvers in the oil during running conditions.
Cutting Performance in Machining of Large-Sized Spiral Bevel Gears Using Multi-Axis Control and Multi-Tasking Machine Tool
Authors: Kawasaki Kazumasa , Tsuji Isamu
Published: July 2014

Large-sized spiral bevel gears are usually manufactured based on a cyclo-palloid system and have equi-depth teeth as well as a face hobbing system by a continuous cutting procedure using a special generator. It has been possible to machine the complicated shape because of the development of a multi-axis control and multi-tasking machine tool.The manufacturing method of the gears has been proposed using this development process. In this method, the spiral bevel gears are modeled based on a CAD system and are machined based on a CAM system. In this paper, the cutting performance in machining of the large-sized spiral bevel gears using the multi-axis control and multi-tasking machine toolis investigated. As a result, the relationship between the tool life of end mill and gear accuracy were made clear. The surface roughness and tool mark of the machined gears were compared with those using the special generator.
The Design and Manufacture of the Wireless Power Transmission System in the Cardiac Pacemaker
Authors: Liu Xiu Quan , Li Yan Hong , Min Li , Ping Huang
Published: July 2014

Generally the cardiac pacemaker is supplied power by micro battery, but the battery lifetime is limited, the Wireless Power Transmission (WPT) technology is a new method to supply power source for the cardiac pacemaker. Firstly the structure of the WPT system in the cardiac pacemaker were introduced. Then, Coupling transformer and rectifying and regulating circuit were designed. Finally, the test system of the WPT in the cardiac pacemaker was established, and the resonance frequency was 596 kHz, When the work frequencywas equal to the resonance frequency, the output power was maximal; when the input voltage of the primary winding was 5.8V, the voltage of the cardiac pacemaker may be up to 8.8V, which could effectively drive the cardiac pacemaker Record S, the results show the design is feasible.
Application and Thinking of “Jiangcheng Culture” Elements in Web Design
Authors: Xin Zhang
Published: July 2014

All aspects of our social activities and living are changing with current economic globalization, the web design is the fastest and most convenience way to transmit global information to the users through network. Meanwhile, with the development, web design has been more matured gradually focusing on individualization to show certain cultural contents. As a result, web designers in Wuhan City shall make an endless attempt on cultural innovation and pay more attention to the application and thinking of “Jiangcheng culture”.
Research of the Model to Foster Engineering Students’ Ability and the Assistant Analyzing System
Authors: Fang Yong Ze , Liu Zi Fen , Zhao Dan Fan , You Zhe Feng
Published: July 2014

Engineering education should be centered on strengthening college engineering students’ ability, which should be implemented through all courses’ teaching during the entire four college years. This paper researches and constructs an ability fostering model by which the students are fostered in engineering colleges, and poses an analyzing method and a computer assistant analyzing system based on this model.
Supplier Selection Model of College Materials Procurement
Authors: Rao Cong Jun , Yu Lei
Published: July 2014

With the vigorous development of the our country higher education enterprise, the demand of materials and equipments also increased year by year in university, so the supplier selection is particularly important. In this paper, we select four prominent influence factors to establish a supplier evaluation index system, and then present a multi-objective fuzzy comprehensive evaluation decision model to select the supplier in the college materials procurement. Further, we highlight the implementation, availability, and feasibility of the fuzzy comprehensive evaluation model using a procurement decision example.
Mixed NMF Blind Source Separation Algorithm
Authors: Zhao Zhi Jin , Liu Zhong Jian
Published: July 2014

The rank one NMF blind source separation algorithm (NMF-R1) was obtained by imposing the sparsity constraint on the fast NMF algorithm based rank one. NMF blind source separation algorithm based on least squares (NMF-LS) was obtained by using pseudo-inverse matrix. NMF-R1 algorithm was superior to the existing blind source separation algorithms based on NMF. NMF-LS algorithm had faster computation speed, but the result of decomposition was not unique. In order to further enhance the signals separated performance, crossover iteration between NMF-R1 and NMF-LS was used to getting the mixing matrix and the signal matrix, and the mixed NMF blind source separation algorithm (NMF-LR) was obtained. Simulation results show that the separation performance of NMF-LR algorithm is better than that of NMF-R1 and NMF-LS, and the computation complexity of NMF-LR algorithm is nearly the same as NMF-R1 algorithm.
Performance Comparison of Energy-Aware Task Scheduling with GA and CRO Algorithms in Cloud Environment
Authors: Wu Lin , Wang Yu Jing , Yan Chao Kun
Published: July 2014

With energy problem of cloud data center is becoming more and more serious, the BoT scheduling algorithm only considering the timespan is not applicable to the cloud computing environment. In order to explore the energy-aware task scheduling algorithm performance, this paper validates simulation experiments with GA algorithms and CRO algorithms, to optimize the makespan as the main objective, to optimize energy consumption indicators for the secondary objective. Experiments show that, GA algorithms and CRO algorithm can be applied to different scenarios, while optimizing makespan, but also to some extent reduce the total energy consumption of the system can be used as task scheduling strategy cloud environments.Keyword: Cloud Computing, Task Scheduling, Energy-awareness, CRO algorithm, GA algorithm
The Generalized Fuzzy Time Series Model for Forecasting Base on the Optimization of the Length of Intervals
Authors: Wang Yan Hong , Qiu Wang Ren
Published: July 2014

Based on the analysis of some conventional fuzzy time series model,this paper proposes a new method by using a single constrained optimization to determine the interval length for improving the forecasts.The conventional fuzzy time series models are enhanced by forecast-weighted method in the forecasting.In the proposed model,which is evaluated by mean square error(MSE),fuzzy membership degrees are used to calculate forecast weights. The empirical results show that the proposed model outperforms than the conventional models.
Design and Implementation of Safety Lock Based on Face Recognition
Authors: Qi Chang Xing , Zhao Lei , Dong Qiao Ling
Published: July 2014

This paper designed and implemented a desktop application of safety lock based on face recognition. The application is developed by C# and used open source visual library OpenCV and SQLite lightweight database. Principal component analysis (PCA) and Rijndael algorithm are respectively used in face recognition and algorithm of encryption and decryption. This paper illustrates design and implementation in detail
Study of Video Object Detection and Shadow Suppression Algorithms
Authors: Gai Qi Lin , Wang Guo Qiang
Published: July 2014

In the field of intelligent video surveillance and the multimedia applications we usually need to detect the moving object which is separated from the background. The results of the moving object detection would affect the subsequent identification, classification and tracking. Meanwhile shadow detection and suppression are also the important technology of the intelligent video surveillance. Because the moving object and shadow usually has the same behavioral characteristics, which has led to the errors of object recognition and tracking and affect the robustness of system seriously. This article studies the principle and algorithm of background subtraction, and has a detailed discussion and analysis. Shadow detection and suppression algorithms based on the YUV color space for processing. The experiment result shows that the algorithms for moving object detection with a better accuracy and stability of this paper.
Situation of Natural Gas Hydrate Research
Authors: Li Zhang , Kun Men Hong , Ming Zhu Li , Yang Zhang Shu
Published: July 2014

Natural Gas Hydrate has become a research focus at home and abroad at present. This paper expounds the concept of natural gas hydrate and its types. Analyze its study process and research situation, and make a brief description of its distribution, mining and related environmental problems by tracking the discovery history of gas hydrates. Then put forward the problems in instant need of solving and the key research contents.
Research on Lossless Predictive Coding Methods for Stereo Images
Authors: Li Shi Gao
Published: July 2014

There exists very high correlation between left-view images and right-view images of stereo image pairs. The correlation can help to reduce the stereoscopic image coding bit rate. Proposed methods first estimate the disparity by using causal neighborhood pixels. And then a prediction method which combines inter-view prediction with intra-view prediction is used to obtain a better predictive coding method for target-view images. The reference-view images are then encoded by using those commonly used prediction coding method. The experimental results show that compared with those methods using only intra-view correlation, the proposed method can obtain lower code rate.
Classified Quantization Research on Dot Gain Characteristic
Authors: Wang Qi , Wang Qian , Qiu Xiao Lin , Wang Tian Ma
Published: July 2014

Dot gain divides into physical and optical dot gain. These two parts constitute the comprehensive dot gain in the process of printing. Ink spreading on the surface of paper is used for the analysis of physical dot gain and light scattering function model is used for optical dot gain. Trace the dots on the CTP plate and offset printing proof to analyze the influence of image micro-parameters caused by dot gain. Physical and optical dot gain are quantized to research the correlation between dot gain and shape of dot. It shows that: optical dot gain of AM dot accounts for a larger proportion; dot gain of all types has no relation with shape of dot. Besides, physical dot gain of FM dot accounts for a larger proportion than optical dot gain.
Computer Vision Application and Research on the One-Dimensional Body Mass Precision Measuring Device
Authors: Nie Shu Yan , Yang Chang Qi
Published: July 2014

The human body segment inertia parameters is the research of biological mechanics and solid mechanics.And its mechanical device research is the fields of machinery and automatic control.In this paper,we solved the distance measurement of the human body link points,and that is to say we solved automatic recognition and high precision positioning of the human body link points in the one-dimensional Body mass precision measuring device,and verify the feasibility of application of computer Vision in link points measurement in the one-dimensional Body mass precision measuring device.
Study on Architecture of Measurement of Multi-Points Strain of Hinge Sleeve of Cubic Press under Super-High Pressure
Authors: Sun Xuan , Shi Jing Xiao , Zhong Zhi Xian , Zhao Hong
Published: July 2014

A system of measuring of multi-points strain of hinge sleeve of cubic press was presented. This system can measure more than 40-points of stress synchronously. The key equipment of this system is PXI platform which is the product of NI. This system acquires data of strain of hinge sleeve of cubic press under super-high pressure when it is working, which is very useful for aid-design of hinge sleeve of cubic press. The results of measurement are also helpful for comparing with simulations and validate its reliability.
Application of the Flexible Brake on Wind Driven Generator
Authors: Zhou Hong Feng , Li Qing
Published: July 2014

The brake of the wind driven generator requires a gentle process. Which decreases the damage to equipment. In this paper, the flexible brake which can be realized a gentle braking is described. The application on the flexible brake of the wind driven generator are analyzed and explained. Brake is a MCU (Microprogrammed Control Unit) as the core. By the principle of the brake gently, flexible brake has been achieved by the principle of smooth braking. Based on the principle of pulse width modulation of the throttle valve, a safe and reliable braking force has been realized with hydraulic devices and electronic components. MCU controls relay to achieve PWM (pulse width modulation), and monitor the temperature and brake frequency monitoring and so on.
Fast Finite-Time Consensus Tracking of First-Order Multi-Agent Systems with a Virtual Leader
Authors: Xiao Qiu Yun , Wu Zhi Hai , Peng Li
Published: July 2014

This paper proposes a novel finite-time consensus tracking protocol for guaranteeing first-order multi-agent systems with a virtual leader to achieve the fast finite-time consensus tracking. The Lyapunov function method, algebra graph theory, homogeneity with dilation and some other techniques are employed to prove that first-order multi-agent systems with a virtual leader applying the proposed protocol can reach the finite-time consensus tracking. Furthermore, theoretical analysis and numerical simulations show that compared with the traditional finite-time consensus tracking protocols, the proposed protocol can accelerate the convergence speed of achieving the finite-time consensus tracking.
Global Robust Output Regulation of a Class of Nonlinear Systems with Nonlinear Exosystems and its Application
Authors: Liu Su Ming , Jiang Yuan , Dai Ji Yang
Published: July 2014

An adaptive robust output regulation design is proposed for the output feedback systems with a nonlinear exosystem. A new nonlinear internal model is first designed for the control input. The output feedback control design is further achieved based on a type of state filter which is designed for the transformed augmented system. The adaptive control technique is successfully incorporated in the stabilization design to ensure the global stability of the proposed control design for output regulation. The result is successfully applied to solve a tracking control problem associated with the well known Chua’s circuit.
The Sliding Mode Variable Structure Control Method for Brushless DC Motors
Authors: Yin Xi Jie , Xu Jian Guo
Published: July 2014

The sliding mode variable structure control method for brushless DC motors with uncertain external disturbances and unknown loads is studied. A neural sliding mode control scheme is proposed for reducing chattering of sliding mode control. A global sliding mode manifold is designed in this approach, which guarantees that the system states can be on the sliding mode manifold at initial time and the system robustness is increased. A radial basis function neural network (RBFNN) is applied to learn the maximum of unknown loads and external disturbances. Based on the neural networks, the switching control parameters of sliding mode control can be adaptively adjusted with uncertain external disturbances and unknown loads. Therefore, the chattering of the sliding mode controller is reduced. Simulation results proved that this control scheme is valid.
Time Domain Simulation for a 6 DOF Tanker Model in Presence of Waves
Authors: Sun Qiao Mei , Chen Jin Guo
Published: July 2014

Modeling and control of marine vessels raised huge interests in recent years. Lots of articles provided many different mathematical modeling and dynamic control methods with advanced intelligent algorithms. In this paper we presented a 6 DOF dynamic model for a tanker vessel, investigated on its maneuverability and conducted numerical simulation experiments to show 6 DOF motion behavior of the vessel including position and orientation. And we discussed the turning ability of the vessel in simulation using a PID controller in the present of environmental waves.
3D Geometric Modeling of Francis Turbine Blades Based on Wooden Patterns and UG Software
Authors: Lu Lei , Zhang Li Da
Published: July 2014

To quickly and easily get a smooth and accurate 3D model of blades, This paper was based on the two-dimensional wooden patterns of the existing francis turbine blades in "AutoCAD", by importing UG software platform, directly translating two-dimensional lines to get three-dimensional wooden patterns, without calculating the spatial coordinates of distribution points on the blade section lines, obtaining the optimized smooth pressure sides and suction sides of the blades by characteristic surface intersecting lines, after partial rounding and sewing the sheets, the process of three-dimensional modeling of blades was finally completed. This takes a solid foundation for hydraulic performance prediction and CFD numerical simulation analysis of the francis turbine. The blade modeling method described in this article has some reference value.
Triangle Formation Control of Multi-AUVs with Communication Constraints
Authors: Li Guan Nan , Dong Hui Ying , Xu Hong Li
Published: July 2014

Aimed at solving the problem of multi-AUVs formation control, an analysis has been made on a triangle formation based on leader-follower construction, with a multi-AUVs formation controller designed with communication constraints taken into account. The desired velocity of the follower is the resultant velocity of three component velocities, each of which has different function. The convergence of the proposed controller is proved by establishing an objective function that can represents the status of the formation. Simulation experiments are carried out to demonstrate the proposed controller is effective.
Motion Simulation and Finite Element Analysis of the Manipulator Based on SolidWorks
Authors: Lu Peng , Cheng Dao Lai , Shi Gang , Zhou Zhi Hao , Li Nan Kun
Published: July 2014

It will use SolidWorks to design structure of Manipulator and to establish the Three-dimensional Modeling based on automated welding robot of Shanghai Bamac Electric Technology Co., Ltd.,then by using the plug of simulation and motion of SolidWorks, it will focus on the Motion Simulation and Finite Element Analysis of the Manipulator. Finally the trajectory and the work space of the Manipulate can be received, and provide a basis of manipulator analysis in order to optimize the manipulator for the company.
Fault Location Scheme for Transmission Lines Using Kaiser Self-Convolution Windowed FFT Phase Comparison
Authors: Fan Guo Chen , Zhu Yong Li , Yan Hong Wei , Gao Yan Feng
Published: July 2014

In order to improve the fault location accuracy, and eliminate the influence of spectral leakage in power transmission line fault location, we proposed a novel fault location scheme for transmission lines based on multi-measurements and phase comparison with Kaiser self-convolution windows FFT, which can locate the fault between two adjacent towers in the fault-prone segment. It is based Kaiser self-convolution window's excellent performance of leakage suppression, which can effectively solve the phase current fault component is relatively large errors due to spectral leakage problem. Firstly, this paper analyzes the causes of the phase spectrum leakage, then elaborates the sidelobe characteristics of Kaiser self-convolution window, and lists phase comparative fault location using steps, finally, verifies the correctness of the proposed method by simulation. The results show that the proposed method can effectively suppress spectral leakage, has a high location accuracy, a wide applicability and its solving of phase difference is precise.
Application Research on the Intellectual Inspection System of Transmission Line Based on the “Mobile Information Platform”
Authors: Yang Zhen Wei , Yi Wei , Jin Yu
Published: July 2014

The power transmission line is one of the important parts of electrical power system, the management and in-spection of the transmission lines have been significant routine job ensuring the reliability of the transmission system. According to actual requirements and characteristics of Transmission line inspection, the intellectual inspection system of transmission line based on Mobile information platform was designed using Geographic Information System (GIS). This novel inspection system was composed of GIS,Global Positioning System (GPS), PDA and GPRS. The system changes the traditional inspection modes.Owing to the advantages of high reliability, practicability and scalability, the practical application of this intellectual inspection system shows that it completely meets the requirements for fast speed, high efficiency and real-time performance.
The Design and Calculation of Fur Material Cleaning Machine
Authors: Su Yi , Li Zheng Feng , Huang Shu Qin
Published: July 2014

In order to improve dyeing capacity of the fur material, a fur material cleaning machine is designed; This paper Introduces the structure and working principle of the machine, The paper also discusses the design process of incomplete gear mechanism, introduces the problems that should be paid attention, elaborates relevant calculation steps. The use of incomplete gear mechanism realize the alternation of rotary movement time and idle time ,The machine has the advantages of gas-electric combination, program control, high production efficiency, convenient operation, etc.
Modeling and Design of Fuzzy-Neural Network Controller of Electric Power Steering System
Authors: Geng Guo Qing
Published: July 2014

Most Automotbile Electric Power Steering (EPS) controller designs are based on a simplified accurate model,however,EPS controller is affected by many nonlinear friction and damping easily, such as road condition,sensor noises and the lateral wind disturbance.These uncertainties affect the accuracy of assist current, the EPS performance and the driving safety. Aimed at the nonlinear MIMO system of electric power steering system,the mechanism and dynamic characteristic of EPS is analysed,and EPS model is developed. Then the fuzzy-neural network controller is designed and the corresponding simulation is performed.The results show that the proposed EPS control strategy can provide good performance of stability and controllability and can increase the anti-jamming capability of vehicle.
Simulation Study for Mixing Characteristics of NH3 and Automobile Exhaust in the SSCR System
Authors: Qu Da Wei , Zhang Kai , Fan Lu Yan , Gao Hai Bo
Published: July 2014

In this paper we talk about the influence factors to the NH3 spray of Solid Selective Catalytic Reduction (SSCR) system by using AVL FIRE 3D commercial simulation software when NH3 and exhaust gas mix in exhaust passage,the influence factors include: engine condition, NH3 temperature ,nozzle installation angle and nozzle position. The conclusions are as follows:engine condition has much Influence for NH3 and automobile exhaust mixing,the mixing is better,the exhaust flow is larger, the exhaust temperature is high;NH3 initial temperature for the gas mixing has little influence;nozzle angle increases is good for the axial distribution of gas and the gas mixing characteristics; For the SSCR system direct injecting NH3 can optimize the nozzle position, and reduce the exhaust system volume.
Design of Intelligent Underground Sound Bird Repellent System Based on Wireless Communication Network
Authors: Yin Xie Jie , Lin Jian , Shao Zeng Zhen
Published: July 2014

Aimed at problems nowadays existing in airport bird drive, an intelligent underground sound repellent system is designed. Combined with characteristics of bird behaviors and psychology, an intelligent wireless bird repellent system in the form of sound repellent gun array is built. This system has been applied by many aviation units, which can effectively reduce bird disaster in the airport with good practical effects.
Reference Signals Design and Evaluation on Radio-Interface Based Synchronization of LTE Base Station System
Authors: Zeng Ru Hong , Miao De Shan , Zheng Nai Zheng , Yang Hong Wen
Published: July 2014

This paper discusses the reference signals used in synchronization for LTE system. In general, primary synchronization signal (PSS) correlation based acquisition and reference signals based tracking loop are applied for time and frequency synchronization but it is unclear which legacy reference signals (RS) will be used as the listening RS for radio-interface based synchronization. Besides the legacy cell-specific reference signals (CRS) utilized as the listening RS, the other potential candidate could be either CSI reference signals (CSI-RS) or position reference signals (PRS). Upon performance evaluation, we compare the pros and cons of CRS, CSI-RS and PRS based synchronization and present our views.
A Pushlet System Optimization Method Based on Servlet
Authors: Liu Yong Lang , Xiong Xiao Mei
Published: July 2014

It was the key factor that Servlet thread had been take up. it was affected the pushlet performance, in order to solve this problem, we introduced of Servlet3.0 asynchronous features, we need to transform the Pushlet, concurrent performance was improved after optimization, it can to run with high performance in the high number of concurrent users, a long time.
Design and Implementation of a New CNG Dispenser Control Platform
Authors: Zhang Xu , You Xiang Dong , Luo Qian , Zou Xiao Jia
Published: July 2014

CNG dispenser is a kind of equipment which can provide CNG fuel filling services for CNG vehicles. This paper presents a novel design of CNG dispenser control platform. The hardware design of the circuit board includes ARM11 core-board and extended board, and the software design is based on the Embedded Linux system, including the development of Linux drivers and applications. The new platform not only has better processing performance in basic functions like filling fuel, but also has excellent scalability such as network support and more humanized operation mode.
Study on E-Government Virtual Information Service Center Model Based on Cloud Computing
Authors: Li Dong , Liu Xi Lin
Published: July 2014

Cloud computing as a shared infrastructure is a kind of super information systems to provide information services according to on-demands. Cloud computing will become the important means and development trend in future E-government information service. This paper expounds the connotation of the concept of cloud computing at first. Cloud computing technology features are analyzed in the information service of E-government. And a framework model of E-government virtual information service center based on cloud computing is put forward. Interface layer, application service layer, and Data Layer of the model are discussed.
Analysis on Development and Application of Online Customized Tour
Authors: Wang Xiao Jun , Li Xiao Kang
Published: July 2014

Online customized tour provides personalized travel services based on the needs of tourists and the trend of tourism development. Therefore, it has broad prospects of application as a new type of model on the tourism market. This paper, by analyzing application status of online customized tour, finds out the driving factors and restricting factors in order to propose countermeasure to accelerate the application of online customized tour.
The Research of the Dynamics of the Manipulator of the Parallel Structure with the Flexible Links
Authors: Prokopenko Nikolai Nikolaevich , Valiukevich Yury Anatolievich , Alepko Andrey Vladimirovich
Published: July 2014

The construction and kinematic computing of the manipulator of the parallel structure with flexible links are given in the papers [1, 2] («Cable crane» [3]). It is reasonable to use the construction of the manipulator of similar type suggested below under the conditions with the rugged relief of the terrain and expanded service area.
The problem of the research of manipulators with flexible links lies in the feedback effect of the lading dynamics on the links dynamics. The non-linearity of the kinematic structure of the manipulator expects the emergence of the feedback effects on the links in the dynamics which can exclude one or several links out of the structure (due to the flexibility of the construction). This makes difficult to use the purely analytical method of problem solving for simulation.
The obtaining of the dependences of free and forced oscillations in modes of acceleration, steady motion and deacceleration under the exertion of the perturbation influence on the fixing point in the form of the force, the magnitude and direction of which is known should be considered as the main task of the research for the reviewing system.
Characterization and Corrosion Behavior of Multilayer [TiN/TiCN]n Growth on AISI 316LVM Steel
Authors: Aperador William , Torres Mauricio Plaza , Ruiz Erika
Published: July 2014

In this paper a study of the corrosion resistance is shown in a physiological medium of multilayer coatings [TiN/TiCN] n with periods bilayers of 1, 50 and 150 deposited on silicon substrates ( 100 ) and stainless steel AISI 316 LVM by the method of RF magnetron reactive sputtering with an RF power ( 13.56 MHz ) and using two targets of Ti and TiC. The electrochemical behavior simulated body environment was evaluated by the technique of using Tafel polarization curves, in Hanks solution as electrolyte. Morphological characterization was performed using scanning electron microscopy (SEM) on silicon substrates (100), also was used to characterize the mechanism of attack on the uncoated steel and coated steels. Was found to be markedly increased corrosion resistance to the deposition of multilayer coatings evidencing the effect of the spatial period ( Λ ) in reducing the degradation of these coatings , the effect was shown for the substrate alloy type stainless steel AISI 316 LVM, confirming the good performance of the variation of the bilayers period.
Acoustic-Emission Wave Response to a Dislocation Source in Layered Media
Authors: Zhang Rui Chong
Published: July 2014

This paper presents synthesis of acoustic-emission (AE) wave propagation in multi-layer materials and simulation of AE wave responses at free surface. In particular, the AE source is modelled as an arbitrary-orientation dislocation over an inclined-to-surface fault within one layer or at the layer-to-layer interface, while the materials are assumed as multi-layer media, each of which is homogeneous, isotropic and linearly elastic. With the use of the integral transformation approach, the three-dimensional wave propagation in the materials is solved in transformed or frequency-wavenumber domain. Subsequently, a closed-form solution for wave responses at free surface is found, which can then be converted in time-space domain. Numerical examples are finally provided for illustration.