bluuebunny/crossref_metadata_2025 huggingface dataset:
Optimal Operation for Source Parallel Pumping Stations
Authors: Feng Xiao Li , Qiu Bao Yun
Published: June 2013

Pumping station transfers water from Yangtze River, and the head of is varied frequently within a wide range due to the tidal water. Taking Jiangdu parallel pumping stations in China as a case, under the premise of pumping certain volume of water per day, considering head varying and time-varying electrical price, mathematical models were established aiming at the minimum operation cost and solved with Simulated Annealing Particle Swarm Optimization. The number of running pump units and pump unit operation duties were determined in different time periods. The results indicate that operation cost of optimal operation schemes considering time-varying electrical price and adjusting blade angles is saved 13.72% than that of not considering.
Cutting Force Model for Diamond Cutting Microstructured Surfaces
Authors: Zhang Hai Jun , Huang Yan Hua , Li Guo , Du Kai
Published: June 2013

The depth of cut changed periodically along the contour of the cutting surfaces. The diamond tool of sharp point tip was used in diamond cutting microstructured surfaces with Fast Tool Serve (FTS). All reported the cutting force model were not suitable for accurately predicting cutting force. A cutting forces model concerned with edge radius, spring back and dynamic shear angle was proposed for diamond cutting microstructured surfaces. The model was verified with a series of experimental results. The results showed that the proposed model was able to exactly predict the cutting force.
Path Planning of Stacker for Automated Building Materials Warehouse Based on the Improved Adaptive Genetic Algorithm
Authors: Li Shen
Published: June 2013

In this paper, the improved adaptive genetic algorithm has been presented, which not only can overcome the early maturity and slow convergence speed of traditional genetic algorithm, and greatly improve the efficiency of genetic algorithm. This method can improve the quality of stacker path planning and work efficiency for modern automated building materials warehouse. Using the genetic algorithm toolbox of Matlab, the simulation results can further verified the feasibility and effectiveness of this method.
The Automatic Non-Negative Matrix Factorization of the Hierarchy Clustering Method
Authors: Li Tie Qi , Zhang Wen Shuo
Published: June 2013

People in such huge information how to find useful information becomes a problem. In order to deal with hierarchical relations in text data, a novel method, called automatic non-negative matrix factorization of the hierarchy clustering, is proposed for the text mining. We use the vector space model as the research foundation, mainly discusses the feature selection and weight calculation two problems. The experimental results on the real data sets demonstrate that our method outperforms, on average, all the other 6 methods.
For a Class of Discrete-Time Nonlinear System Based on Iterative HDP
Authors: Song Chun Ning , Hu Zhou , Lin Xiao Feng
Published: June 2013

In this paper, the iterative HDP-based optimal tracking algorithm for discrete-time nonlinear systems is studied. The optimal tracking control problem of original nonlinear system is transformed to the optimal regulator problem by transforming the system and performance index in this algorithm, then using the HDP iteration to solve the optimal regulation problem. Finally, the neural network implementation for the algorithm is detailedly elaborated, and the given simulation results show the effectiveness of the optimal time-varying tracking based on iterative HDP algorithm.
Efficient Surface Integral Equation Using Travelling-Standing-Wave Vector Basis Function for Complex EM Scattering Problems
Authors: Yang Pei Gang , Nie Zai Ping , He Shi Quan , Qing Tao
Published: June 2013

A new set of travelling-standing-wave (TSW) basis functions are proposed for curved triangular patch in this paper. This kind of bases is not only able to describe the standing component of induced surface current but also able to simulate the phase variation of induced current accurately. The authors used these basis functions to discrete surface integral equation (SIE) with a series of coarse meshes (even larger than 2λ) to calculate the electromagnetic (EM) scattering from the perfect electric conductor (PEC) targets with method of moment (MoM). Numerical experiments indicate that the MoM-TSW scheme even has more advantages than the MLFMA-CRWG scheme in the aspects of computational efficiency and memory storage.
The Calculation and Estimate of Interval-Valued and Fuzzy Dirichlet Series Coefficient
Authors: Duan Yu , Luo Hong Jian
Published: June 2013

This article gives the definition of interval-valued Dirichlet series. Based on [1, , this article discusses some properties about the coefficient of interval-valued and fuzzy Dirichlet series. Ihe calculation of coefficient , of interval-valued Dirichlet series and the coefficient of fuzzy Dirichelt series are also discussed. Moreover, some relative theorems and properties are presented.
A Study of Vertical Vibration Transmissibility by the Human Body
Authors: Picu Mihaela
Published: June 2013

The transmission of longitudinal vibration (generated by the vibrating platform Brüel & Kjær 4827) in the whole body of ten subjects was investigated. Altogether 200 individual tests were made. Vibration was measured with 356A16 PCB Piezotronics triaxial accelerometers fixed to the toes, ankles, lumbar, cervical, fingers, elbow and shoulder. Vibrations were analyzed with a multiple acquisition vibrations system NetdB. Data were processed using dBFA Suite. Vibration time was 1min and frequency range was between 10-40Hz, because the low frequencies are the resonance frequencies for the human body. Body vibration transmissibility was determined by the ratio of root mean square acceleration signal from accelerometer by the root mean square of acceleration signal from the vibrating platform. It was found that the accelerations at the lumbar level are more attenuated than the accelerations at the ankle level.
A New Reptile Method for Contour Tracing Based on an Extended Freeman Code and an Alterable Window
Authors: Liu Qing Long , Tang Li Xin , Yi Fan , He Ling Song
Published: June 2013

The reptile method with an alterable window is often used to trace the contours for image recognition in machine vision. But sometimes a wrong result will be gotten if searching all the outermost pixels of the window. This paper proposes a new reptile method based on an extended Freeman code and an alterable window. In the method, the extended Freeman code is designed to determine the initial searching direction of a contour and the rule of filling breakpoints. In the course of tracing, the contour direction is used for reducing the searched pixels in the alterable window. The experimental results show the new method is superior to the traditional one.
Motion Model Parameters Estimation for Electronic Image Stabilization Instrument
Authors: Zhong Xun Yu , Ren Tian Hui
Published: June 2013

Fast and optimal motion estimation method is proposed for electronic image stabilization. First, an approach for macro-block judgment is presented. Before motion vectors calculation, gradient information is analyzed, only useful reference blocks that are indispensable for accurate motion estimation are selected, by which the number of macro-blocks for subsequent calculation is reduced. Second, in the block matching, an improved SSDA is used to reduce computing cost. Finally, the affine transformation model and similarity transformation model of image motion are created and using least squares method for solving the optimal estimation of model parameters. Experimental results show the accuracy and fast computing speed of the proposed method.
Misalignment Characteristic Analysis Based on Advanced Empirical Mode Decomposition
Authors: Li Hui Min , Zhao Wei , Zhang Yun
Published: June 2013

A new method of misalignment characteristic analysis, which is based on advanced empirical mode decomposition (AEMD), is presented in this paper. At first the vibration signals of a rotor system with different misalignments is collected separately. Then the multicomponent signal x (t) is decomposed into a number of the so-called intrinsic mode functions (IMFs) by use of AEMD respectively. For these IMFs the wavelet method is used to extract the interesting features. It is found that the IMF2 contains the interesting misalignment character. Additionally the experimental results substantiate that the proposed method for misalignment analysis can identify the varying trend of misalignment fault clearly.
Visualization Design of Data
Authors: Jiang Lei Ge
Published: June 2013

With the explosion of information and the diversify of modern culture, the communication of information have changed a lot, especially the visualization design of data .This paper analyzed the status of Data Visualization in order to expound the significance of Data Visualization and the applications trend .
Identification of Tandem-Extrusion System's Dynamic Characteristics Based on MATLAB and State Subspace Theory
Authors: Yang Yu Jie , Yan Bao Rui , He Ya Dong , Xin Chun Ling
Published: June 2013

In view of the complexity of twin screw and melt pump tandem extrusion systems, the identification of the dynamic characteristics of these systems was performed by using MATLAB and state subspace method. Three input one output model was obtained and the controllability and observability of the system was identified by MATLAB. The fitting degree of simulated and actual melt pressure curve increased with increasing the output variables, which indicated that the tandem extrusion system was an interrelated coupled nonlinear system.
Quantitative Study on Impact Factors Affecting Visual Comfort of Stereo Images
Authors: Liu Chang , Li Su Mei , Zang Yan Jun , Zhu Dan
Published: June 2013

Based on the current studies on visual comfort of stereo images, we studied the brightness, hue and saturation factors impact the comfort of stereo images combining the characters of human visual system (HVS) quantitatively. According to the improved limit method and subjective assessment experiments, we defined the comfortable matching and difference map of brightness, hue, saturation, and verified their universal applicability. The accurate rate can reach 90%.
A New Method for Sub-Pixel TDICCD Image Registration
Authors: He Bin
Published: June 2013

This paper presents a more accurate and faster method for sub-pixel TDICCD image registration. The method makes the best of the overlapping pixels between multi-channel images, which allows for scaling, translation and rotation. Secondly, the proposed technique combines an efficient pixel-moving interpolation scheme with surface fitting, which makes use of accurate interpolation calculation and fast surface fitting in the iterative process. Finally, the accuracy and speed of the algorithm is evaluated by sub-pixel registration of multi-channel images and comparison with other sorts of efficient methods. The experiment results show that the accuracy of the method reaches 0.01 pixels and it is 3 times faster than the interpolation method.
Ultrasonic Image De-Noising Based on New Wavelet Threshold Function
Authors: Liu Yan Xia , Han Bing , Li Yan , Dong Bei Bei , Cao Yan Yan
Published: June 2013

In order to improve the quality of image de-noising,against the disadvantages of the distortion caused by the method of the hard threshold de-noising and the fuzzy phenomenon of the details caused by the method of the soft threshold de-noising, this article proposes a new method of wavelet threshold de-noising for the ultrasonic images. It is indicated in the simulation result that this method has good de-noising function: it can remove the noise effectively and retain the details of the images and the edge information at the same time.
Mobile Storage and Data Security Management Research
Authors: Zeng Wen Ying , Zhao Yue Long
Published: June 2013

The mobile storages especially in mobile devices hold a lot of important and private data. The portability and mobility may lead to loss and theft, therefore security problem of mobile storages and mobile data may suffer from troublesome and damage. TCG provides TPM for trust and security management. It is insufficient with mobile storage devices because mobile storage devices are often separated and load with heterogeneity and massive data. The paper analyzes the security management of mobile storages, proposed practical mobile storage and data security management methods and mechanisms, and illustrates mobile storages integration schemes for single storage device and multiple storages devices and cloud storage. The overall mobile storage and data security policies and methods should be performed urgently.
A Policy-Based Mixed Publish/Subscribe Message Exchange Pattern Used for Traffic Monitoring System
Authors: Dou Yun Liang , Li Zhu Qing , Ma Dian Fu , Zhao Yong Wang
Published: June 2013

Pub/Sub message exchange pattern (PSMEP) is a flexible and effective message exchange pattern, by which various components in a large-scale distributed system can be linked together organically and interact with each other in a loosely coupled environment. There are two PSMEPs in traditional Pub/Sub model: topic-based pattern & content-based pattern. Topic-based pattern is elegant and efficient, but not flexible to make subscription; while content-based pattern is flexible enough, but is not efficient. This paper proposes a policy-based mixed PSMEP to make up the deficiency of the two patterns, and a simulation in traffic monitoring system introduced in this paper will proof the policy-based pattern is effective.
The Application of Network Intrusion Detection Technology in Instrument
Authors: Huang Luo Guang , Meng Li Min , Guo Yong Hong
Published: June 2013

The development of intrusion detection systems in the world are reviewed in this article first. On the basis of in-depth analysis of the characteristics of network attacks and intrusions we aim at to solving the problems mentioned above, the characteristics of survival of the fittest genetic algorithm is used to solve the problem. Second, a detection model based on genetic algorithms is established, and finally the model is simulated. The simulation results show that the model can solve its intrusion detection system, security issues, with a theoretical and practical application.
An Efficient Non-Blocking Commit Protocol
Authors: Huang Wen Jun , Li Long , Li De Wen , Wei Ke
Published: June 2013

The two-phase commit protocol is widely used in distributed database systems to ensure the atomicity of distributed transaction. The traditional two-phase commit protocol fails to solve the blocking problem when the coordinator is out of service. Three-phase non-blocking commit protocol was designed to solve the blocking problem of two phase commit protocol, but it brought heavy communication and log overhead between sites. In todays distributed database systems, due to the growing large number of sites, the failure of single point become more and more often. The traditional commit protocol has become a bottleneck of the system. In this paper, a new non-blocking two-phase commit protocol is proposed to solve the blocking problem. Compared to the traditional three-phase commit protocol, the proposed protocol reduces the log and communication overhead. Theoretical proof has been given to show that the proposed commit protocol is non-blocking and meet the ACID properties under variety of failure conditions.
Propagation Characteristics of 2.4 GHz Wireless Channel at Different Directions and Heights in Tea Plantation
Authors: Peng Yu Li , Li Ping Ping , Wang Ji Zhang , Hu Yong Guang , Lin Yong Feng
Published: June 2013

For configuring wireless sensor networks system and node deployment in tea plantation, this paper researched propagation characteristics of 2.4 GHz wireless channel at different directions and heights in perennial tea plants. Received signal strength and packet loss numbers were obtained by field testing measurements at three directions and two heights. The results showed that different heights of sensor nodes in the tea plants determine the wireless channel propagation characteristics. But the impact of propagation directions on wireless signal is weaker. Besides, validation results show that it s best to deploy the sensor nodes antennas on the top of the tea canopy or above of it in the tea plantation. This research can provide technical support for WSN application in tea plantation.
Adaptive Subcarrier, Bit and Power Allocation Based on Hopfield Neural Network for Multiuser OFDM
Authors: Li Su Fang , Jiang Ming Yan , Dong An Ming , Yuan Dong Feng
Published: June 2013

A kind of adaptive subcarrier, bit and power allocation method utilizing Hopfield neural network (HNN) to minimize the overall transmit power of multiuser OFDM is studied in this paper. In order to find the power optimal subcarrier, bit and power allocation under the constraints that one subcarrier can only be allocated to one user and all users are allocated the same numbers of subcarrier, the number of bits of each subcarrier is finite, bit data can be allocated to each subcarrier, two kinds of new energy constrained functions are constructed for the HNN. It is shown through numerical simulations that the proposed methods can find the optimal allocation with less complexity compared with the exhaustive method.
A New Hybrid Algorithm Based on Artificial Fish Swarm Algorithm and Genetic Algorithm for VRP
Authors: Wang Chun Bo , Guo Jun
Published: June 2013

In this paper, we propose a new hybrid algorithm based on artificial fish swarm algorithm and genetic algorithm to solve the capacitated vehicle routing problem (CVRP). The proposed algorithm is a swarm intelligence optimization algorithm based on the animal behavior. The experimental result show the effectiveness of this proposed method.
Minimization of VM Placement Change in Energy-Aware Resource Provisioning for Cloud Data Center
Authors: Jing Si Yuan , Ali Shahzad , She Kun
Published: June 2013

Numerous part of the energy-aware resource provision research for cloud data center just considers how to maximize the resource utilization, i.e. minimize the required servers, without considering the overhead of a virtual machine (abbreviated as a VM) placement change. In this work, we propose a new method to minimize the energy consumption and VM placement change at the same time, moreover we also design a network-flow-theory based approximate algorithm to solve it. The simulation results show that, compared to existing work, the proposed method can slightly decrease the energy consumption but greatly decrease the number of VM placement change
A New P2P Streaming Media VOD System Based on Window
Authors: Li Qiang , Chen Liang Bin , Wang Zhong Hua
Published: June 2013

Currently some P2P video-on-demand patterns using the corresponding technique to adjust and monitor network peer state, effectively reduce the multilayer peer forwarding delay, so as to ensure that the system has good stability and expansibility, but in response to the sudden resource request can not guarantee that the system load balancing. This paper presents a new P2P streaming media VOD system based on window, using a resource reservation mechanism for load balancing algorithm which can realize video server in each media stream between the rational allocation, give full play to the peer load capacity. The simulation shows that the system is able to respond to sudden resource request, and has high bandwidth utilization, effectively improves the performance of the system.
Shortest Path Optimization Algorithm in Intelligent Transportation System
Authors: Wang Hao Yu , Zheng Yi , Ji Xiao Juan
Published: June 2013

To ensure the smooth flow of urban traffic, through analysis of shortest path solution, the key technology to the realization of intelligent transportation system, and on the basis of traditional Dijkstra algorithm analysis, a new optimization algorithm is put forward.
The Application of Animation Logo in Modern Visual System
Authors: Chen Yong Jun , Han Jun
Published: June 2013

With the rapid development of internet electronic media, the whole environment of modern visual system is in a dynamic and changeable state, so there are limits for those constant and static logos. However, the animation logo will adapt to the dynamic and changeable modern visual environment due to its changeable and polynary form, especially, it is the optimal logo form for the modern internet electronic media; if combined with the operation of creative industry, it would rapidly spread the brand and extremely boost up the brand, and create tremendous influence while putting the brand in a very good status.
Research of Virtual Emotional Human System Based on Artificial Life
Authors: Nian Shan Po , Chen Lei , Hou Cai Xia , Gong Run Kun , Peng Li
Published: June 2013

t is the task for artificial intelligence to give human intelligence to machine, such as thinking, reasoning and deciding, etc. To give life to a machine is the research fields of artificial life like evolution, generating, self-adaptation, self-organization, etc. Artificial emotion gives a machine various senses as laughing, anger, sorrow and happiness, etc. It is intolerable for artificial emotion to be separated from artificial life. So the research frame of the virtual emotional human system is represented. And the emotional model, method and technology are investigated in this paper. A simulation has been done. The results are encouraging and it will be applied into the interface between human and machine.
Hybrid Modeling Based on Multiple Range Image
Authors: Ruan Ning Jun , Wu Peng , Xie Kai
Published: June 2013

In order to reconstruct three dimension model of an object, a new method of hybrid modeling is presented. This method use multiple range image of different viewpoint, according to the color and texture, the pixel point can be mapped to correct position in three dimension space by the back-project transformation. Then the image can be got in any viewpoint by modeling reconstruction and reprojection. Experiments have proved that this method has excellent features, especially in high realistic image and static complexities. So, it can be used to reconstruct some objects with complicated shape and topologies.
Trajectory Planning for the Moving Boundary in Three Dimensional DEM Simulations
Authors: Hu G.M. , Hu L. , Zhang Y. , Fang Z.Q.
Published: June 2013

The boundary objects moving along a prescribed trajectory commonly appear in the applications of DEM to industrial fields. Generally, a boundary motion can be expressed as the combination of translational and rotational motion through specifying the linear and the angular velocity. However, it is unsuitable to describe the trajectory by this way because of the instantaneously changing location and velocity of the boundary during the simulation. A trajectory planning method is presented to model the arbitrarily complex route where the boundary passes through. This method has been used to predict the digging process of an excavator bucket in this paper. The simulation results show that the complex trajectory of a boundary object can be accurately depicted by the trajectory planning method, and the interaction between the moving boundary and the particle system is reasonable.
Numerical Simulation for Inert Gas Stimulated by Explosion of Solid Propellant Emitting Visible Light
Authors: Guo Jia , Xie Yu Shu , Fang Jun , Zheng Chen , Xie Li Feng
Published: June 2013

In this paper, dynamic responses on radiation energy intensity of inert gas are simulated in use of software ANSYS / LS-DYNA when inert gas is stimulated by explosion of solid propellants to emit visible light. The effects for the visible light energy intensity emitted by inert gas are analyzed on different initial pressures in the inert gas container and with different igniting methods by propellants. Simulation results show that, the bigger initial pressure in the container is, the higher the peak value of visible light energy density intensity is and the better the effect of the visible light emitted by inert gas is. There are fewer effects on the peak value of visible light energy intensity emitted by inert gas with different igniting methods. However, it has an impact on the stability when inert gas emitting visible light. The stability is the best when central point of the propellant column is ignited.
Multi-Objective Robust Design of Loader Transmission Based on Genetic Algorithm
Authors: Wang Jian Bin , Yin Ji Shu
Published: June 2013

The fuzzy theory and robust design is applied to the optimization design of the loader transmission, and put forward the fuzzy optimization design method of loader Transmission based on the robust idea. It is established the fuzzy robust optimization design model of loader transmission which has the goal of small size and high efficiency, and finally shows the optimal method and calculation example.
Study on the Dynamic Behavior of the Ball Passage Vibrations Associated with a Linear Rolling Bearing
Authors: Chen Ting , Huang Qi Bai , Li Shan De , Zheng Wei Guang
Published: June 2013

An analytical model to predict nonlinear dynamical responses of a linear rolling bearing due to ball passage vibrations has been developed. The implicit type numerical integration technique Runge-Kutta iterative method is used to solve the nonlinear differential equations. In order to verify the proposed model, experiments are carried out and good agreement between the theoretical result and that of measurement is achieved. It is helpful to use this model to design a satisfactory linear rolling bearing with comprehensively pleasant ball passage vibrations.
Contrasting the Parasitic Torque on a Drag-Driven VAWT through a Variable-Blade Rotor Architecture
Authors: Castelli Marco Raciti , Benini Ernesto
Published: June 2013

The present work exhibits a further development of a mean for furthering conventional drag-driven VAWT technology by contrasting the counter-rotating (parasitic) torque generated from drag-driven vertical-axis wind turbine (VAWT) blades travelling into the wind through the use of a variable rotor blade geometry. A former research on water tank experimental tests on a small rotor characterized by three horizontal blades having variable geometry has been presented [. Each blade was obtained by connecting a horizontal flat plate to a tilting one swinging over a horizontal axis, so that the tilt angle between the two plates could vary depending on flow field conditions.
In this paper several open-field measurements at different free-stream wind velocities have been carried out, in order to characterize the energy performance of the rotor for two different blade profile architectures: first experimental investigations were performed on a fixed-angle blade configuration of 41.3 degs between the horizontal and the inclined flat plates. Then, attention mainly focused on tilting blades, achieving a quantification of the influence of blade swinging on overall rotor performance.
A full campaign of analysis was completed for both blade configurations and overall rotor torque and power were analyzed as a function of incoming wind velocity and rotor angular speed, resulting the variable-blade configuration maximum power coefficients much higher with respect to the corresponding classical drag-type fixed-blade architecture.
Design and Improvement on a Stress Loading Device for Ligament Tissue Engineering
Authors: Wu Xiu De , Wang Xiong
Published: June 2013

Strain loading control is important for addressing the complex requirements of tissue engineering in bioreactor. The stress variation laws of the engineering tissue during growth were analyzed, and the strain loading rules were determined. A new mechanical stress loading device was developed, which was able to apply complex concurrent mechanical strains to three-dimensional scaffolds independently housed in reactor chambers. The AC servo control system was used to carry out tensional and rotational displacements. Well controlled mechanical stimulations could be applied to the developing ligament tissue, through the closed-loop control system for stresses, allowed different mechanical loading patterns on the scaffolds. We analyzed the strains of scaffolds fixed in circular and planar modes. The strain, motion, and position control methods were designed. This device is suitable for the bioreactor used in ligament tissue engineering.
A High-Frequency High-Voltage Excitation Melting Ice Power Design
Authors: Zhou Yu Sheng , Zeng Long , Chen Pei Yao , Pan Zheng
Published: June 2013

High-frequency and high-voltage excitation melting ice device is mainly composed of the excitation power supply and the notch filter device, which can realize the power transmission line melting ice without power cut. This paper applied power electronic frequency conversion technology to design a excitation melting ice device with 18KV/40KHZ.This device is adopted PWM control technology, and is mainly composed of the rectifier, controller and inverter. For the small frequency converter, the high-voltage frequency conversion function can be achieved through each phase in series divided voltage method. According to the 1000 kV AC ultrahigh voltage transmission lines, a melting ice model is set up by using SIMULINK simulation. The results show that this device can generate stable 18KV/40KHZ excitation melting ice electric energy in 30ms,and the control method is convenient and simple, the range of frequency and voltage modulation is big characteristics.
Preliminary Design and Adiabatic Analysis of a 3kW Free Piston Stirling Engine
Authors: Duan Chen , Shu Shui Ming , Ding Guo Zhong , Yan Ji Wei
Published: June 2013

In recent years, as one kind of Stirling engines, free piston Stirling engines are attracting world attention. Free piston Stirling engines could be applied to the solar dish system, micro-CHP system and so on. The development of a free piston Stirling engine is discussed in this paper. The ideal adiabatic model is used in the preliminary design of the free piston Stirling engine. The key parameters of the designed engine and the thermodynamic analysis are described in detail. Then the performance of the engine is obtained.
Research on Biological Properties of PEEK Based Composites
Authors: Pan Yu Song , Wang Jing , Pan Cheng Ling
Published: June 2013

PEEK based composites have been increasingly employed as biomaterials due to its excellent biological characteristics. In this paper, the biocompatibility, bioactivity, bio-tribology and biomechanics of PEEK composites were investigated. The results showed that PEEK possesses excellent cellular and blood compatibility. The bioactivity of PEEK could be improved by various techniques such as plasma treatment, surface grafting, surface deposition and addition of bioactive glass ceramic in the PEEK matrix. The results of bio-tribology showed that the biotribological properties of PEEK based composites could be comparable with that of traditional artificial joint materials such as UHMWPE. It is even superior to UHMWPE under certain conditions. The biomechanical properties of PEEK composites showed that they can improve the initial stability, reduce the stress shielding and improve bonding strength between bone and implant after replacement, while they are compared with traditional implants such as stainless steel, titanium alloy and Co-Cr-Mo alloy.
The well-Posedness of a Two-Unit Standby Redundant Electronic Equipment System
Authors: Qiao Xing , Wang Yan , Ma Dan , Liu Zhuang
Published: June 2013

In this paper, we deal with a two-unit standby redundant electronic equipment system under human failure. In reliability study, it is ordinary to substitute the steady-state reliability indices for dynamic ones because the time-dependent solution is difficult to get. But this replacement should be based on some conditions in general. Therefore it is important to study the unique existence and the expression of the dynamic solution and it is the same with its stability.
Fuzzy Robust Design of Cycloid Pin Wheel Reducer Based on Genetic Algorithms
Authors: Wang Jian Bin , Yin Ji Shu , Yu Chao
Published: June 2013

Fuzzy robust design will be applied to optimal design of cycloid pin wheel reducer, and it is established that fuzzy robust optimal design mathematical model of cycloid pin wheel reducer in order to achieve the goal of the small size and high efficiency. Genetic algorithms correlation functions in MATLAB is used to solve the model, and optimal methods and calculation examples is given.
Performance Comparison between Series-Connected and Parallel-Connected Thermoelectric Generator Systems
Authors: Wang Yin Tao , Liu Wei , Fan Ai Wu , Li Peng
Published: June 2013

The connections between the thermoelectric modules are crucial importance for the performance of the thermoelectric power system. Many studies have been done to improve the output of thermoelectric system, but very little specific to the connections between the modules. A mathematical model of a module has been established, and based on this model, the performance of two systems composed of 6 pieces of thermoelectric modules, one in series connection and the other in parallel connection, is simulated with MATLAB software and then compared. The results can be used as reference for the design and prediction of thermoelectric system.
Calculation and Analysis on Condensation Heat Transfer for Pressurized Oxy-Coal Combustion Flue Gas
Authors: Dong Jing Lan , Yan Wei Ping , He Xue Hong
Published: June 2013

For the convective condensation heat transfer of flue gas with a few water vapors produced by pressurized oxy-coal combustion in vertical tube, investigation and calculation were carried out by theoretical analyzing method. Heat transfer mathematical model was set up by modified film model and Nusselt's condensation theory. Calculations were performed for condensation heat transfer at different wall temperatures, Reynolds numbers and water vapor fractions. Results show that with the increase of wall temperature, the condensation rate of flue gas, heat flux and condensation film thickness decrease. And with the increase of Reynolds number of the mixture gas, the condensation rate of flue gas and heat flux increase too, while the condensation film thickness decrease. With the decrease of water vapor fraction, the condensation rate of flue gas and heat flux decrease too, while the decrease of condensation film thickness is not obvious.
Research Regarding the Ultrasonic Examination by Thermal Metalspraying Deposits on OL50 Parts
Authors: Botez Sorin Constantin , Dumitru Gabriel Marius , Rujinski Alexandru Dumitrache , Dumitru Bogdan
Published: June 2013

Thermal Metalspraying is one of the most important reconditioning methods used nowadays throughout the world. One of the most acute problems regarding thermal metalspraying is the achievement of a proper adherence between the deposed layer and the base material. Testing this adherence is made in most cases by destructive control performed on test probes. However, in the case of final products reconditioned through metalspraying, the use of of non-destructive techniques is required. This paper presents a research made to establish the opportunity of using the ultrasonic control regarding the adherence of the materials deposed on the base material through thermal melaspraying.
The Un Destructive Examination by Active Pulse Thermography of the Layers Deposited by Thermal Spraying
Authors: Dina Viorel Cristian , Dumitru Gabriel Marius , Dumitrascu Constantin
Published: June 2013

In this paper we propose to use active pulse thermography for detecting the defects from the layers deposed by thermal metal spraying, at the interface based on material-deposited material and from the and in the immediate vicinity. The method is based on stimulating a thermal spray metallic samples using two separate flasuri separated by a period of time. This method has been tested by several tests with defects obtained artificial. In this paper work the method it is presented with the theoretic base and the experimental results.
Analysis of Water Cooled Permanent Magnet Traction Motors Using 3D Fluent and Thermal Field
Authors: Chen Ping , Shen Qi Ping , Han Xue Yan , Tang Ren Yuan , Xin Ke Yan
Published: June 2013

This paper gives a method to calculate the temperature rise of the water cooled PM railway traction motor using 3D fluent and thermal field. Building a 3D Finite Element Method (FEM) model of 20kW PM synchronous traction motor, the heat transfer coefficient of each tunnel wall is calculated by fluent field, and then the temperature distribution is got from thermal field. Compared with the experimentation, the precision of this method is verified and some conclusions are obtained.
Uncover the Mystical Veil of Perpetual Motion Machines
Authors: Shyu Yuh Huei
Published: June 2013

It was shown recently that the conclusion of the non-existence of perpetual motion machines is based on a sound yet incomplete proof. This result directly challenges our long-time cognition, namely, “Perpetual motion machines can’t be constructed.” In other words, our long time cognition is a misconception. This is not the only one; there exist some other related misconceptions. Discovering one misconception is not enough; we need to identify all other related misconceptions. In this paper, we will identify these misconceptions. Identifying these misconceptions is a prerequisite of objectively examining the correctness of the recently discovered perpetual motion machine.
254 nm Radiant Efficiency of High Output Low Pressure Mercury Discharge Lamps with Neon-Argon Buffer Gas
Authors: Zhang Hao Jun , Han Qiu Yi , Zhang Shan Duan
Published: June 2013

High output low pressure mercury (LPM) discharge UV lamps have been briefly introduced. In order to measure the 254 nm radiant efficiency simply and preciously, Keitz formula was used and its advantage was illustrated. The LPM lamps had outer diameter of 19 mm (T6). The buffer gases are neon (65%) and argon (35%) with total pressure 1-10 Torr (133-1333 Pa). The lamps were operated with cold spot temperatures from 20°C to 80°C and discharge current from 0.8 A to 2.0 A. The electric field, input power, 254 nm UV irradiance and irradiance of other Hg lines from 265 to 579 nm in positive column were measured. The radiant power of each wavelength can be calibrated according to the 254 nm output and the Keitz formula. It was shown that the radiant efficiency of 254 nm can reach a maximum of above 40% at cold spot temperature 45-47 °C and current 1.6 A for filling pressure less than 3 Torr. The optimal mercury vapor pressure was 1.2 to 1.4 Pa. The output percentage of other Hg lines was below 5%. With the decrease of buffer gas pressure, the 254 nm radiant efficiency increased obviously.
Design of Thyristor Valve Assembly in on-Load Automatic Capacity Regulating Distribution Transformer
Authors: Meng Zhen , Piao Zai Lin
Published: June 2013

The working principle of on-load automatic capacity regulating distribution transformer is elaborated in this study, a layout scheme with anti-parallel thyristor valve assembly as capacity regulating switch is designed. The thyristor valve assembly is selected. The respective character in the system of electromagnetism trigger and online monitoring as well as photoelectricity trigger and online monitoring is described. With the comparison, it takes the system of electromagnetism trigger and online monitoring at last.
Application of BAM Network in Fault Diagnosis of Oil-Immerseed Transformer
Authors: Wang Zhong Jie , Liang Yong Chun
Published: June 2013

Bidirectional Associative Memory (BAM) network is presented to analysis the fault of power transformer. In order to improve the classification accuracy, the conception of combination is introduced. The fault diagnosis of power transformer is consisted of 4 BAM networks. The first BAM network is used to classify the normal and fault. The second BAM network is used to classify the heat fault and partial discharge (PD) fault. The third BAM network is used to classify MC-overheating faults in magnetic circuit and EC-overheating faults in electrical circuit. The fourth BAM network is used to classify RSI-discharge faults related to solid insulation, USI-discharge faults unrelated to solid insulation. By comparing with the RBF neural network algorithm for the same 90 input set, we conclude that the BAM network a good classifier for the fault diagnosis of power transformer.
Design and Analysis of the Novel Plate Modal Motor
Authors: Mou Shann Chyi , Yang Li Hui , Huang Jin Sing
Published: June 2013

In this paper, we demonstrated a lightweight compact motor operating at 70 ~ 100 kHz. The motor is simpler than an electric motor in structure and lower power consumption but higher speed than that of conventional peizoelectric motors. Driver for the PMM is impressively simple. A wave generator and amplifier are all that it takes to supply the piezoelectric ceramic with voltage. Finite element model was developed using ANSYS for the purpose of prediction of the resonance frequency of the vibration mode for the motor driving stator. The periodic plate modal deformation is passed on to a driving bolt, which causes it to oscillate with a movement resembling that of a turning vibrator. The rotor attached to the motor presses its tip on to driving bolt to be driven. The motor is continually being modified to enhance the performance and efficiency. It has a lot of merits such as slim shape, easy holding for motor structure and low manufacturing cost.
Research on a New Fault Phase Selector of Protective Relay for Double Circuit Lines on same Tower
Authors: Yuan Zhao Qiang , Yu Xiao Ting , Liu Yin Mu
Published: June 2013

Aiming at the misoperation of the conventional phase selector by phase current-difference during some cross country faults, a fault phase selector is developed. Based on the fault lines of the corresponding fault phase are selected, a novel synthesis fault phase selector using voltages and currents in single circuit at single side is proposed, which is based on comparing the difference of fault voltages to make sure all the fault phase in the lines and judging the phase degree and amplitude condition of the fault currents. Used this scheme and the phase current difference, the fault phase may be picked up correctly in double circuit lines on the same tower, especially in cross country faults.
Development of Materials Characterization Procedure for Composite Aircraft
Authors: Lee Ho Sung , Lee Seyoung A. , Choi Ji Ung
Published: June 2013

It is required to characterize the materials according to the regulation in order to manufacture and fabricate components to be used for aircraft. The main purpose of this requirement is to determine the suitability of materials used for safe flight. Since the properties of composite materials are sensitive to the processing, characterization of composite materials has required very conservative methodology and therefore the whole process of characterization has been a redundant and time consuming process. This paper summarizes the efforts to adopt the composite materials characterization procedure for composite aircraft and provide the effective statistical methodology for evaluating composite materials manufacturing process. The result will be applied to the materials certification procedure for domestic composite materials for aircraft within the level of a global standard.
Research Regarding the Dynamic Behavior of Linear Hydraulic Servo-Systems
Authors: Drumea Petrin , Cristescu Corneliu , Dumitrescu Catalin , Dutu Iulian , Ilie Ioana
Published: June 2013

The paper presents the theoretical results of extensive research on the dynamic behavior of linear hydraulic motors, carried out in INOE 2000-IHP, in the framework of the NUCLEU Programmer. The research has been conducted both theoretically and experimentally, but, in this paper, is presented only the theoretical research. Theoretical research has taken place with the modern means of mathematical modeling and computer numerical simulation. The article presents some theoretical interested results obtained in the research, results that are of real scientific interest, but, also, with practical value through their use in the design of fluid power components and equipments.
Influence of Repetitive PI-P Control on Performance of Inverters Wireless Parallel System
Authors: Wei Jin Cheng , Liu Ye , Miao Yan , Shi Qian
Published: June 2013

For wireless parallel inverters system, there is a high requirement of control precision: otherwise current-sharing effect would be very poor. Based on this characteristic of wireless paralleling technology, this paper represents the combination control method of repetitive control with PI-P voltage and current double close loop control (abbreviation as PI control) in this system. This control method, which combines with PI control, has relatively faster dynamic response speed, improves not only the capacity with nonlinear load and parallel circulation characteristics by characteristics of repetitive control, but also the steady state control accuracy of the system, meanwhile reduces the harmonic content. Its an outstanding composite control method. This paper proves the feasibility and superiority of this method by MATLAB simulation.
Harmonic Loss Calculation of Three-Phase Transformer Based on J-A Model
Authors: Liu Lian , Li Qiong Lin , Liu Hui Jin , Cui Xue , Zou Lei
Published: June 2013

Beginning with characterizing the nonlinearities of transformer, this paper uses the J-A model to represent the hysteresis of iron core, and fits the model in calculating exciting current. Compared with the other methods, such as polynomial and describing function method, J-A model is more capable in representing nonlinearity, so the calculated current would be more accurate. Then, after analyzing Maxwell equations that meet certain boundary conditions, the paper considers comprehensively the effects of skin and proximity, and then obtains the computing way of ac resistance under harmonics. At last, based on the mentioned results, paper proposes a set of three-phase transformer model which could calculate harmonic losses. The proposed model is a kind of combined time-and frequency-domain model that possesses good convergence. The introduced example has verified the correctness and effectiveness of the model which absolutely suits the engineering applications.
The Equivalent Model of the Harness Network at High Frequency in Automobile
Authors: Zheng Ya Li , Zheng Shu Li , Wang Quan Di , Yan Xiao Xu , Li Xu
Published: June 2013

The common-mode current along the harness is one of the main reasons which can not meet the automotive electromagnetic compatibility (EMC) standards for equipment or system. So, the harness model is the critical factors for the automotive EMC prediction. In this paper, the harness network equivalent model is proposed, which is based on the terminal loads and the equivalent wave impedance. The equivalent model is also demonstrated from the simulation results by finite element method.
Grounding Failure Detection Based on ELM Information Fusion in Distribution Power Systems
Authors: Zhou Yu Sheng , Liu Yong Feng , Jun Xiang , Pan Zheng
Published: June 2013

For the complexity of the distribution network and the particularity of single-phase grounding fault, intelligent distribution network grounding fault line selection model based on the Extreme Learning Machine (ELM) information integration is proposed in the paper. When a single-phase grounding fault happened, the relation functions for the wavelet packet decomposition, the fifth harmonic method and the traveling wave method are respectively determined, the fault estimate data of transient zero-sequence current are calculated. The fault line is accurately judged by the ELM networks information fusion. Through analyzing MATLAB simulation result about different ground fault line selection, the validity and accuracy of the method are verified.