bluuebunny/crossref_metadata_2025 huggingface dataset:
An Improved Gaussian Fitting Method Used in Light-Trap Center Acquiring
Authors: Xu Zhong Yu , Zheng Hong Yan , Yang Hong Yan
Published: July 2014

In the 3D measurement based on line-structured light projection, the accuracy of center position of the stripe is of great importance for that of the 3D information acquisition system. A method of sub-pixel center-extracted that in the level of sub-pixel were discussed by He Jun-ji. Based on it and considered the fact that light intensity of the stripes center presents a Gaussian distribution status approximately, in this paper, a new method for extracting stripe center line has been proposed. The extracting curve is closer to the ideal value, and can efficiently extracted the center-line of light stripe, and the accuracy of 3D reconstruction is improved.
Hydrocarbon Micro-Seepage Anomalies Detection Algorithm Based on FPCS for Hyperspectral Remote Sensing Data
Authors: He Zhuo Li , Deng Xiao Lian , Ai Si Min
Published: July 2014

Long-term hydrocarbon micro-seepages develop diverse arrays of chemical and mineralogical changes in rocks and soils. We called this change mineral alteration. Mapping this mineral alteration is thus a potential tool for hydrocarbon exploration. The surface changes caused by hydrocarbon seepage can potentially be detected by remote sensing techniques. In this paper, we discussed some methods which can heighten the altered mineral on the map. The feature-oriented principal component selection (FPCS) and band ratio method collaborated together in extracting the abnormal area. SASI airborne hyperspectral data of Xifeng oilfield which located in southern Ordos Basin were used in this experiment . The experimental results show that the methods adopted in this paper have a good advantage of detecting surface anomalies and alternations associated with oil and gas information.
Landing Point Predicting Method in Target Re-Entry Measurement
Authors: Li Xiao Yong , Zhu Wei Kang , Zhou Jin Biao , Chen Gui Ming , Yang Lei , Wu Hui Hua
Published: July 2014

By introducing some atmospheric models and selecting methods for minimum integration step size and optimum initial integration value, a program of real time and near real time landing point predicting together with weighted processing methods of many groups of landing point parameters were put forward. Engineering application showed: the above methods and program improved real time and near real time landing point predicting precision more greatly compared with previously used methods, which had proved their broad applicability.
The Influence of Electric Parameters on the Surface Quality of Ceramic in Internal Grinding Using the Ultrasonic and ELID Composite Grinding
Authors: Zheng You Yi , Pang Hao , You Qi , Jia Xiao Feng
Published: July 2014

Analyzed the relationship between electrical parameters of the ultrasonic and electrolytic in-process dressing (ELID) composite grinding and the surface quality of the ceramic through the experiment. The value of the voltage and the current were recored by labview and the surface quality of the ceramic was tested using Talysurf CCI 6000 In the experiment. The results show that the selection of electrical parameters affects the electrolysis speed of diamond grinding wheel and the speed of the oxide film formed and the quality of the oxide film, and then affects the grinding performance of the grinding wheel and the grinding quality of workpiece.
Measuring Device for the Moment of Human Aspects
Authors: Zeng He Chuan , Yang Chang Qi
Published: July 2014

Due to the quality of all aspects of the human body differ greatly, collecting attitude parameters,electronic scales can not achieve the precision requirements. Therefore, how to ensure a large range torque measurement accuracy becomes the core of a recognition system of dimensional distribution of body weight. In this paper, based on the original measure will convert measuring force to measure the distance , redesigning the said bed to improve test accuracy.
An Improved of Extended Kalman Filtering Method on Tracking Accuracy of Bistatic Sonar System
Authors: Sun Yong , Zhao Jun Wei
Published: July 2014

The Extended Kalman Filter methods were widely used in the estimation of tracing situation in military fields. In this paper, we proposed a method of using multiple iteration of the observation and covariance matrix in the measuring equations during the tracking process in bistatic sonar system. Therefore the iterating extended kalman filtering (IEKF) algorithm was emerged at this situation. The simulation results show that the proposed tracing algorithm exhibits higher accuracy compared with the EKF algorithm. This new method can take full application of the measured information to improved the tracing accuracy in the whole controlled area. Keywords: bistatic sonar; tracing accuracy; IEKF algorithm; target moving analysis
Trusted Data Aggregation with Low Energy in Wireless Sensor Networks
Authors: Engouang Tristan Daladier , Liu Yun , Zhang Zhen Jiang
Published: July 2014

— Scientific researches advancements achieving miniaturization of Micro-electromechanical Systems, has enable smarts autonomous embedded devices know as sensor nodes, that are developed on numerous platforms using the proprietary of hardware and software with capability to communicate wirelessly. Today more than ever these sensors are continuously spreading to civilian usage side of things and in many others applications , including military, security, medical, environments, and animal among others, to sense specific occurrence of desired event and may carried very important data on physical device such as the mica-mote. Hence a plethora of security protocols arises in order to mitigate the risks of malicious attacks such as eavesdrop communications, or data alteration, using cryptographic techniques such as Elliptic curve for data privacy, accuracy, integrity, efficiency, and reducing the energy consumption by mote and processors. We focus on securing data by all means. Hence the in-network processing technique is used to reduce considerably the energy consumption, considering that sensors deployments in inaccessible and resource-constrained environments. After the drawback, we investigate the secured data aggregation and give security requirements that are mandatory to a Trusted Data Aggregation with Low Energy model to satisfy. The security and energy performances are analysed comparing with others methods.
Index Terms—TDALE, Aggregation, Elliptic curve, RSA, Security, Energy
The Improved Design of Embedded CNC Milling Machine
Authors: Zhang Hai Ying , Shu Yu Feng
Published: July 2014

The machining of complex shape workpiece embedded NC milling machine is suitable for all kinds of hard, brittle, thin products. This paper embedded CNC grinding machine design requirements, through the transmission gear, the workpiece clamping and buffering mechanism to improve the design, CNC system and abrasion resistant materials were optimized, so as to meet the requirements of high performance precision grinding machine.
Design of Salt In-Bags Incasing Control Management System Based on Dual Closed-Loop Fuzzy Controller
Authors: Hui Yan Bo , Wang Yong Gang , Wang Li , Niu Qun Feng
Published: July 2014

According to auto-incasing equipment characteristic and control demand, a kind of salt in-bags incasing control management system was designed. The paper introduced the key technologies realization of the system. In the paper, a new fuzzy controller was designed to build a dual closed-loop fuzzy control system, realizing incasing goal site error on-line continuous correction. A logistics management module based on e-Tag was designed to realize product information traceable management. The experimental results show the system realizes accurate position control and RFID logistics management with high reliability and high control precision. The system can be popularized to other products packaging industry.
Optimal Assignment of Emergency Power Considering V2G
Authors: An Xiang Yang , Liu Ji Chun , Wu Yun Xia , Li Jia Yi , Zhang Ling Zhu , He Chen , Chen Hong Hui , Zheng Xiao Li
Published: July 2014

An optimal assignment algorithm of emergency power supply considering V2G is proposed with a necessary concern for its effect on society. Firstly, the comprehensive index weight coefficients are proposed according to the priority. Next, this paper establishes the network minimum total cost objective function based on constraints such as time and capacity limit, using symmetric triangular fuzzy numbers to simulate the uncertainties in emergency logistics on the condition that ensuring the normal work of EV in next day which is used to search for the best logistics path. Finally the optimal algorithm of emergency power supply is developed based on genetic algorithm. The model and algorithm are proved by a numerical example, and the study helps to reduce the investment and operating cost of power system and improve the ability of urban electric network in emergency situation.
Suggestions on Implementing Energy-Saving Diagnosis Technologies and Services of Power Grid Enterprises
Authors: Li Yu Hao , Cheng Le Feng , Xi Lei , Xu Guan Hong , Yu Tao
Published: July 2014

In order to meet the national requirement of “two 3‰” of demand side, this paper analyzed basic connotation of overtaking energy-saving emission reduction work in power grid enterprises, introduced main contents included in energy-saving diagnosis technical specifications. Meanwhile, the power grid enterprises energy-saving diagnosis work and energy-saving emission reduction work of demand side management are prospected.
A Transducer Matching Method with Signal Frequency and Inductor Adjustment Combined for Submerged Structure Ultrasonic Cleaning
Authors: Yin Yu Zhen , Zhu Chang Ping , Wang Bin , Wu Qiang , Yao Cheng , Chen Bing Yan , Ren Qing Gong , Han Qing Bang , Tang Yi Bin , He Zhen Bing , Chen Guo Chao , Li Zhen Xu
Published: July 2014

The application of ultrasonic cleaning for submerged structure is more common, but the resonant frequency of piezoelectric transducer is changed when it is heat at work. The traditional matching method cannot adapt the serial resonance frequency of capacitance branch and dynamic tuning is inefficient. We proposed a transducer matching method with signal frequency and inductor adjustment combined. The technique of identifying true max current value and Phase Locked Loop frequency tracking was used. The automatic tracing of frequency is realized by searching the max current value, and working current was exceeding the threshold of 0.9Imax. The adjustment of inductor was decided by phase comparison and impedance matching was achieved finally. By combining experimental study with theoretical analysis, the feasibility of this dynamic matching method was verified.This method have important significance for improving submerged structure ultrasonic cleaning efficiency.
Design of Active Filter Based on the Active Power Balance
Authors: Ji Ling
Published: July 2014

In order to eliminate harmonics generated by the power electronic devices, from a functional point of view the amount of the balance, the use of filters to supply current and DC voltage is sampled in a controlled manner to achieve harmonic compensation, the establishment of a single-phase active power filter the control system of the model and the theoretical analysis of the program by Saber simulation software has been validated in simulation, based on a prototype developed, according to the single-phase shunt active filter to achieve our scheme can effectively harmonic compensation for pollution caused by the rectifier with inductive load, simulation and experimental results show that this method can be controlled harmonic distortion at 5.8%.
Performance Analysis of Simulation of Pedestrian Traffic inside the Hub
Authors: Li Bing , Li Min
Published: July 2014

Transport hub belongs to the people highly gathering places,the pedestrian traffic within the hub is a nonlinear stochastic dynamic problem with uncertain cluster density. The computer dynamic simulation is one of the effective methods to investigate the dynamic characteristics of pedestrian traffic flow at present within the hub.The article studies the error between pedestrian traffic simulation of the commuter simulation software and the actual pedestrian traffic,and explains the simulation error due to the discrete space, fidelity are introduced to evaluate the accuracy of the simulation model.By comparing the Hohhot underground tunnel experimental data and simulation results and the analysis of pedestrian traffic characteristics, it is concluded that the pedestrian traffic simulation performance is closely related to the environment in the hub and the importance of the fidelity of simulation model.
Loss Characteristics Analysis and Optimization of an Off-Axis Rotary Optical Fiber Communication System
Authors: Wang Xiao Hua , Zhao Qian , Li Li , Ding Jie , Zheng Qiu Xin , Liu Li
Published: July 2014

The losses of the off-axis rotary optical fiber communication system were derived from optical fiber coupling, three kinds of misalignments between optical fiber collimators (Axial separation Z0, lateral offset X0, angular tilting θ), incomplete alignment of optical fiber collimator during rotation and system tremble caused by high speed rotating. Some measures were taken to reduce the loss. The thermally expanded core fiber collimator cut down the influence of axial separation and angular tilting. The position of the optical fiber collimator on the flange was adjusted and infrared right angle prisms were installed to reduce the losses during rotation of the system. In addition, improving the precision and optimizing device of mechanical structure can increase the stability of the whole experiment platform and decrease the losses.
Simulation on PAPR Suppression Algorithm for Multicarrier System
Authors: Zhang Rui , Zeng Zhi Bin
Published: July 2014

The main disadvantage of multicarrier system is the high peak-to-average power ratio which can easily result in significant cut-the-top distortion of power amplifier. However, the power efficiency of power amplifier will be reduced by power back-off technology. Therefore, crest factor reduction is important in reducing the peak-to-average power ratio of multicarrier system and improving the efficiency of power amplifier. The peak-to-average power ratio can be effectively reduced with small distortion by the algorithm of crest factor reduction based on peak cancellation. And the performance of peak-to-average power ratio is better with the same error vector magnitude.
Theory Analysis and Simulation of Optical 90° Hybrid without Intersection
Authors: Liu Wei Hua , Wu Gui Ju
Published: July 2014

An optical 90ohybrid consisting of a general interference based 4×4 MMI coupler, a phase shifter and a 2×2 MMI coupler was proposed. This device can demodulate optical signal without intersections. The output power formula of this device was derived from theory, and the effect on phase shifter was discussed analytically and numerically. It is not necessary to control phase shifter accurately, a deviation 10oform perfect phase shift will introduce 2% AC component loss of Q information only.
Two Analog Transmission Schemes for Distributed Detection
Authors: Liu Xiang Yang , Zhu Pei Sheng , Liu Wei
Published: July 2014

In order to improve the detection performance of distributed detection system under noisy fading channel, two analog transmission schemes, i.e. an analog transmission and a modified analog transmission, were proposed. Simulations show that, when the channel SNR is high, such as larger than 20dB, the system with the proposed analog transmission scheme can approach that with ideal transmission condition in detection performance. For low channel SNR, such as less than 10dB, the modified analog transmission scheme results in better detection performance than the binary transmission scheme proposed in literature. Therefore, according to the channel state information at the sensor, the sensor can select appropriate transmission scheme to improve the system’s detection performance.
Analysis of the Ceramic Pattern Modelling Based on Primitives
Authors: Hu Jing Fang , Li Bu Sheng
Published: July 2014

This paper analyzes the creation process of ceramic design, ceramic design according to the characteristics of the ceramic pattern classification for the individual patterns, the suitable patterns, continuous pattern and integrated pattern four, use of modelling primitives knowledge of them is analyzed, finally summarizes the modelling category of ceramic pattern.
A Refinement of Hierarchical Databases
Authors: Li Qing , Liu Ji Guang , Wang Bo
Published: July 2014

Many electrical engineers would agree that, had it not been for the improvement of von Neumann machines, the improvement of write-ahead logging might never have occurred. In this paper, we prove the simulation of virtual machines, which embodies the significant principles of theory. In this position paper we present a multimodal tool for deploying the Internet (Graff), which we use to prove that thin clients can be made metamorphic, certifiable, and "smart".
A Positioning System of Book Based on QR Code in Library
Authors: Lee Shu Dan , Liu Wen Qin , Zeng Wei , Gao Xin , Zhang Cong Song
Published: July 2014

Owing to the inefficiency and difficulty in finding out the position of books in library, this paper designed a positioning system, which is based on QR code and can be used to find out where the book is in real-time. In the design, a QR code is an identity of the position. The mobile wireless cameras, which were set on the bookshelves, acquire the image of QR code and then send it to data processing center. The processing center generates a two-dimensional localization image of books after the QR was decoded, then stores the localization image in the database in order that the readers or managerial staves can get the books they need quickly and easily after retrieving. This paper presents the structure of the positioning system from the perspective of software and hardware, and the feasibility of the design has been proved by practice test. This design also has certain reference value to the promotion of the QR code in other management fields.
Research and Application of Adaptive Technology in Equipment Installation
Authors: Luo Bin , Ye Li
Published: July 2014

Based on the current situation that the accuracy of stress , displacement and trip in the traditional equipment installation can’t satisfy customer requirements. First, this paper analysis the principle of adaptive technology . Then , by establishing the mathematical model of stress and displacement ,the equipment automatically select the appropriate pressure and displacement values to ensure parts assembly optimal.
Applying Improved Clustering Algorithm into EC Environment Data Mining
Authors: Ma Yu Peng , Ma Bo , Jiang Tong Hai
Published: July 2014

With the rising growth of electronic commerce (EC) customers, EC service providers are keen to analyze the on-line browsing behavior of the customers in their web site and learn their specific features. Clustering is a popular non-directed learning data mining technique for partitioning a dataset into a set of clusters. Although there are many clustering algorithms, none is superior for the task of customer segmentation. This suggests that a proper clustering algorithm should be generated for EC environment. In this paper we are concerned with the situation and proposed an improved k-means algorithm, which is effective to exclude the noisy data and improve the clustering accuracy. The experimental results performed on real EC environment are provided to demonstrate the effectiveness and feasibility of the proposed approach.
uKeMa: An Ultra-Lightweight Key Management and Authentication Scheme for Wearable Ad Hoc Networks Based on Body Language
Authors: Xie Yin Hui
Published: July 2014

Wearable consumer electronics such as Google glasses, Apple iWatch, Nike Shoes have been envisioned as next consuming hot spot. It invokes a large amount of applications in the personal healthy, personal safety, and digital entertainment. To save power consumption, those wearable devices usually connect to Internet via a smart phone that performs as a gateway. To avoid unauthorized access from unfriendly devices, it is desirable to encrypt the personal data in the communications of wearable devices. Therefore, the keys for encryption and integrity are required. In this paper, we make the first attempt to solve both key management and authentication together for wearable devices in an ultra-lightweight manner. We propose a scheme called uKeMa that can provide key generation, key updating and authentication for wearable devices with ultra-lightweight power consumption.
Interaction Representation and Application of Flash Animation in Webpage Design
Authors: Yang Shan Shan
Published: July 2014

The application of Flash animation in website design becomes more popular because it is more attractive and infective than static pages. Functions of Flash, status in quo and characteristics of webpage design are analyzed in this paper; how to present and apply the interaction of Flash animation in webpage design better is promoted via three aspects including functional design of guide, smart application of transparent Flash in Banner ads images and the application of pure Flash making websites.
Dynamic Mechanical Property Anisotropy of ZA31 Alloy by Equal Channel Angular Pressing
Authors: Wan Gang , Wu Bao Lin
Published: July 2014

the microstuctures and orientations changing of hot extrusion AZ31 magnesium alloy were obtained by equal channel angular pressing (ECAP). After the ECAP samples annealed, the dynamic anistropy of AZ31 alloy in different impacting directions were given by dynamic compressing in HSPB system. The results showed that with pression passes increasing, the grains were refined more obviously and {0002}<11-20> texture component increased and concentrated in the center of the pole figure. The maxmium reduction under impacting direction (ID) parelleled to extrusion direction (ED) is larger than that of ID // ND during dynamic compressing, and there was a obvious strain softing in the strain-stress curves. However, the dramatic strain hardening and higher yield strength appeared in the stress-strain figure when ID parelleled to ND. In addition, the reasons for mechanical anistropy of AZ31 alloy were discussed in a way of grains orientationes changing.
Performance Improvement on Axial-Flow Fan by Imposing Proper Frame Ribs
Authors: Lin Sheam Chyun , Wang Fu Yin , Chang Cheng Ju , Yen Hung Cheng , Cheng Yung Jen
Published: July 2014

Generally, most research attempts on the axial-flow fan focus on optimizing rotor blade and tip clearance to enhance its aerodynamic and acoustic performances. Few efforts aim at finding out the appropriate frame rib, which is a supporting and vital part within the air passage and thus has significant influence on the turbulent flow near the blade trailing edge. Therefore, this study intends to investigate the geometrical parameters of the frame rib systematically by using an integrated scheme, which consists of numerical simulation, mockup fabrication, and experimental verification. At first, a high-performance fan (90×90×38 mm3) is constructed to serve as the sample fan for this investigation. Then three geometrical sections (triangle, cylinder, and arc) of frame rib are examined systematically to provide a design guideline on utilizing the appropriate frame rib for enhancing the fan performance.
Mechanical Design of Lower Extremity Exoskeleton Assisting Walking of Load Carrying Human
Authors: Şahin Yusuf , Botsalı Fatih Mehmet , Kalyoncu Mete , Tinkir Mustafa , Önen Ümit , Yılmaz Nihat , Çakan Abdullah
Published: July 2014

Exoskeletons are used in rehabilitation, military, industrial applications and rescuing, heavy-weight lifting and civil defense applications as well. This paper presents to design of a lower-extremity exoskeleton assisting walking of a load carrying human. Proposed exoskeleton system is designed to be appropriate mechanism with human lower extremity and it operates synchronously with the human realizes. The aim of exoskeleton actuator system is to provide forces against to external load carried by user during walking, sitting, and standing motions. Thus, it supports human walking and significant portion of external load carrying by the user. Also it makes possible to user spend less energy, less stress and fatigue. Proposed work involves the following design steps: kinematic synthesis of the exoskeleton, mechanical and electro-hydraulic system design.
Enhancement of Natural Convection by Impingement of Corona Wind
Authors: Bhalerao P. , Lai F.C.
Published: July 2014

The enhancement of heat transfer by corona wind reported in the literature has ranged from 16% to 2500%. It is suspected that such a huge variation has to do with the measurement of temperatures involved. The objective of the present study is to reevaluate the heat transfer enhancement by such technique. To accurately assess the heat transfer enhancement, a thermal imaging system has been used for temperature measurement. A corona wind generator is used to produce air jet directly impinging the heat transfer surface (which is a grounded copper plate of 10 cm by 10 cm uniformly heated by a thermofoil heater). The applied voltage varies from 8 kV to 12 kV with two gap distances of 3 cm and 4 cm between the electrodes.
A Study on Thermal Fatigue Life Variation According to Thermal Exposure Time
Authors: Kim Yong Seok , Lee Dong Keun , Lee Jeong Min , Song Hyun Woo , Kim Sung Hyuk , Koo Jae Mean , Seok Chang Sung , Cho Myoung Rae
Published: July 2014

Thermal barrier coating. Thermal fatigue. Exposure time. Thermal fatigue test is one of the most widely used method to evaluate the durability of thermal barrier coating (TBC). However, thermal fatigue test can be concluded in totally different results according to the test variations. Especially, Exposure time of thermal fatigue test can affect the delamination life cycle of TBC. In this study, using the same test equipment which Kim et al. used, thermal fatigue tests were performed with different holding time at high temperature, and the test results by Kim et al. and those by this study were compared. In addition, delamination map was come to perfection from the test results to define more accurate thermal fatigue life.
Heat Dissipation Capacity of Heat Sink Assembly with/without Vortex Generators
Authors: Lin Sheam Chyun , Chang Cheng Ju , Wang Fu Yin , Hsiao Horng Ching , Yang Shiuh Kuang , Hsiao Chun Yu
Published: July 2014

In this research, numerical simulation is adopted to study the cooling characteristic of a bracket-type heat sink assembly. Analysis on thermal/fluid fields are used to justify the physical mechanisms inducing the excessive heat dissipation and temperature rise. In order to enhance the cooling capacity of the heat sink assembly, two types of vortex generator, flow-up and flow-down were used to create the turbulent flow for increasing the contact opportunitybetween fluid and plate fin.Also, thermal resistance is used to evaluate the cooling capacity of the heat sink assembly in this work. As a result, the numerical simulations show thatapparent reductions on source temperature (from 348.0K to 346.2K) and thermal resistance (from 0.266 K/W to 0.253 K/W) are observed for a 150W power input. Besides, significant improvement on the heat concentrated phenomenon anduniform temperature distribution were acquired after installing the vortex generators.Furthermore,a larger longitudinal flow was generated when the flow-up type vortex generator was mounted; therefore the temperature distribution is more uniform than that of the flow-downtype. Clearly, the cooling capacity of heat sink assemblyis enhanced since the fluid is guided to the heat concentrated area when theflow-down vortex generators are adopted.
The Research of a Variable-Focus Ultrasonic Liquid Lens
Authors: Wang Yu , Wang Wei , Zhou Xu , Zhai Fu Long
Published: July 2014

In this paper, a variable-focus ultrasonic liquid lens controlled by the external voltage is demonstrated. That is, the liquid lens can be reshaped with the external voltage, which will cause the focal length to change. The relationship between liquid lens’ shape and the control voltage was obtained. The influence factors of the response time were researched. And the distribution of the ultrasonic field after the lens under different external control voltages was simulated.
Study on a New Type of Automobile Exhaust Detecting System
Authors: Quan Rui Hua , Wang Wan Jun , Wu Jing Feng , Hou Li Fen , Tang Guo Feng
Published: July 2014

While the development of automobile has provided convenience to people's daily life and economic activities, vehicle exhaust has also brought serious environmental pollution. The harmful gas produced by cars contains hydrocarbons and hydronitrogens. Among them, acetylene gas which belongs to atmospheric trace gases, cannot be affected by environmental factors. With the theory of tunable diode laser absorption spectroscopy (TDLAS) technique, wavelength modulation and harmonic detecting technique, this system uses the intelligent data acquisition and processing system based on MSP430 to detect acetylene gas in real-time and display the vehicle exhaust. The system has a good stability, high measuring accuracy and long service life. It is cheap and easy to maintain. It realized low power design.
Effects of Continue Compressing Deformation on Texture of AZ31 Magnesium Alloy
Authors: Wan Gang , Wu Bao Lin
Published: July 2014

The annealed AZ31 magnesium alloy with 400°C and 1.5hour was selected and compressed under different deformation amount. The orientation and microstructure were investigated too. The results shown that the twinning type and amount changed the orientation of new grain after compressed largely. The tension twinning made the orientation deviated form TD to ED in the {10-10} pole figure, but contraction and double twinning mad the orientation concentrated in the TD.
Backward Difference Scheme for Simulating Unsteady Compressible Flow on Deforming Mesh in an Implicit Adaptive Solver
Authors: Ray Saurya Ranjan , Ballmann Josef
Published: July 2014

The paper describes the derivation of the numerical formulation of a second order time accurate and Geometrically Conservative Backward Difference Scheme (BDF) for transient flow simulation of Arbitrary Lagrangian Eulerian (ALE) problems using the control volume approach. The required modification to implement the scheme in an implicit adaptive flow solver is explained. The accuracy and robustness of the current formulation is demonstrated by simulating unsteady flow field over a sinusoidally pitching NACA0012 airfoil with larger allowable timestep in comparison to an existing Mid-point scheme.
Semi-Forward Adaptive Simulation Approach for Tube Hydroforming Loading Path Determination Using a Strain Trajectory Based Fuzzy Logic Control
Authors: Kesvarakul Ramil , Intarakumthornchai Thanasan , Jirathearanat Suwat
Published: July 2014

Tube hydroforming process is a well-established manufacturing process widely employed to form tubular parts that are lighter and stronger compared to those from stampings. Nevertheless, determination of process loading paths, i.e. axial feed distance versus hydraulic pressure, still typically relies on trial-and-error FEM approach. In this paper, a semi-forward adaptive simulation concept is proposed as an effective FEM approach, able to select a feasible THF loading path within a single FEM simulation run. The semi-forward adaptive simulation technique is based on the ability to “adapt” or adjust the loading path as to keep the forming strains within a preferred stain trajectory over the course of a simulation run. Forming strains at the current simulation time step are used as inputs to the fuzzy logic control; the output sets are then used to readjust the loading path for the current and next time steps. This semi-forward adaptive simulation scheme allows one to “correct” the loading path at the current time step as well as to better predict the forming strains in the next time step. It was found that the corrective and predictive nature of this semi-forward simulation approach coupled with the strain trajectory based fuzzy logic control scheme could handle a highly non-linear forming behavior of tube hydroforming processes effectively. In this work, a feasible loading path was determined thru only one simulation run for successful hydroforming of an eccentric bulged tubular part.
Oxidation Behavior of Fe-15Cu-10Al Ternary Alloys at 700°C
Authors: Xiang Jun Huai , Xu Xian Chao , Wang Wei
Published: July 2014

The oxidation behavior of Fe-15Cu-10Al alloy was investigated at 700°C. Oxidation kinetics of the alloy conformed nearly to the parabolic rate law. The scales were composed mainly of alumina, plus a few nodules rich in iron. The very low oxidation rate of Fe-15Cu-10Al alloy showed that 10at.% Al level reached the critical Al content to form a complete Al2O3external layer. Compared with the corresponding Fe-10Al binary alloy, the addition of 15at.% Cu played a beneficial role for the establishment of the full protective alumina layer.
Theoretical Investigation of a Structure for Active Vibration Control with Fuzzy Logic Approach
Authors: Gülbahçe Erdi , Çelik Mehmet , Tinkir Mustafa
Published: July 2014

The main purpose of this study is to prepare mathematical model for active vibration control of a structure. This paper presents the numerical and experimental modal analysis of aluminum cantilever beam in order to investigate the dynamic characteristics of the structure. The results will be used for active vibration control of structure’s experimental setup. Experimental natural frequencies are obtained and compared to verify the proposed numerical model by using modal analysis results. MATLAB System Identification Toolbox and ANSYS harmonic response function are used together to estimate beam’s equations of motion which include its amplitude, frequency and phase angle values. Moreover, the mathematical model of beam is simulated in MATLAB/Simulink software to determine the dynamic behavior of the proposed system. Furthermore, another prediction model approach with multiple input and single output is used to find the realistic behavior of beam via an adaptive neural-network-based fuzzy logic inference system, in addition, impulse responses of the proposed models are compared and the control block diagram for active vibration control is implemented. As a first iteration, PID type controller is designed to suppress vibrations against the disturbance input. The results of modal analysis, the prediction models, controlled and uncontrolled system responses are presented in graphics and tables for obtaining a sample numerical active vibration control.
Summary of the Application of Vanadium
Authors: Yang Qiang Qiang , Fang Yong Wei , Mu Yong Wei , Zhang Sheng Hua , Zhao Ying Shi , Li Yun Gang , Liu Jian Tao , Wu Zhi Jie
Published: July 2014

As one of the important strategic metals, Vanadium is applied widely to various fields, 85% of them are used in steel production. In this paper, the properties and the resource distribution of Vanadium are made a rough introduction, and introduced the present application situation of Vanadium in steel ,on-ferrous metals, alloys, batteries, chemical industry, ect.
Design and Research on Control System of 200Kw Organic Working Fluid Turbine
Authors: Pan Jian , Huang Yue , Gao Wei , Zhang Yan Ping
Published: July 2014

The power generation system using Organic Rankine Cycle (ORC) is a new technology for energy recovery, but very few people have studied the control system of the organic working fluid turbine at present. This paper put forward the speed and power control strategy about the organic working fluid turbine. The parameters of the speed and power regulators are tuned to insure the steady of speed and power. A series of dynamic simulation experiments are carried out in Simulink. Through the simulation research of robustness and load disturbance experiments, the designed control system have a good effect on accuracy and dynamic response.
Summary of Progress in Extracting Vanadium
Authors: Mu Yong Wei , Zhang Sheng Hua , Zhao Ying Shi , Yang Qiang Qiang , Fang Yong Wei , Li Yun Gang , Liu Jian Tao , Wu Zhi Jie
Published: July 2014

This paper mainly summarizes the vanadium leaching process from bone coal, steel slag containing vanadium, catalystcontaining vanadium, including their leaching condition , application circs and these materials’ respective merits and faults under production process. bone coal and steel slag containing vanadium are the usual raw materials and the extracting of vanadium are divided into full wet extraction method and roasting-wet extraction method.The later applied more widely. At the same time, give some short introduction of other new method such as selective precipitation ,slurry electrolysis ,microbial leaching and so on.
Palletizing Robot Dynamic Analysis and Simulation
Authors: Liang Lin Jian , Gao Xue Guan
Published: July 2014

Selection of drive components and determination of dynamics properties are extremely important technical components for overall design of palletizing robot. As an example, the paper firstly introduce how to establish mathematical model and finish kinematics analysis. Based on the previous work, MATLAB scripts are written through the use of Newton-Euler Method to analyze and calculate dynamic analysis, after which the parameters of dynamics are obtained. Then the dynamic behavior is studied by multi-body system simulation using ADAMS software to testify the former analysis in MATLAB. Lastly, two speed trajectory algorithm were adopted to simulate for the same working condition, in an attempt to investigate the difference in their dynamic behavior and provide a reliable theoretical basis for optimal control method.
Study and Discussion on Related Technologies of RoboCup Robots
Authors: Zhao Di , Du Yu Hong , Wu Bao Lin , Wu Chen , Li Meng
Published: July 2014

As a good experimental platform for multi-agent system, Robot Soccer World Cup (RoboCup) has become a hot topic of artificial intelligence. This paper reviewed the technical characteristics of related robots in Simulation, Small Size, Middle Size and Humanoid It introduced the intelligent control algorithms such as Agent structure, Kalman filtering, self-positioning of robots and ZMP stability judgment.
Flexible Job Shop Models for Solving Scheduling and Layout Problems Using Coloured Petri Nets
Authors: Eloundou José , Baudry David , Sahnoun M’hammed , Bensrhair Abdelaziz , Louis Anne , Mazari Bélahcène
Published: July 2014

In this paper we propose models for solving both the layout manufacturing problems and the scheduling manufacturing systems. These models are based on Coloured petri Nets. The particularity of our models is the possibility to include complex programmable functions inside the petri nets models. In our case the programming language is SML/NJ. The advantage of programming language is the possibility to use Heuristics or Meta-heuristic optimization methods inside the Coloured Petri Nets (CPN) model without the necessity to relaunch the simulation of the model at each step of optimization. For describing, analysing and simulating our models we will use CPN Tools.
Energy Efficient Manufacturing and Supply Systems – Case Studies and Results
Authors: Wu Bin , Abad Jorge
Published: July 2014

A supply chain consists of a number of manufacturing sites and distribution centers. Based on energy assessment projects involving 150 manufacturing sites and distribution centers, this paper presents two case studies – one energy intensive manufacturing organization, and one typical distribution center – to illustrate the kind of energy saving opportunities that can be typically identified in manufacturing, and in supply. As a major effort to promote energy efficiency, the International Organization for Standardization (ISO) has developed a new set of standards addressing the use of energy in businesses: ISO50001:2011. This proposes technical and management strategies for companies to follow so that energy use may be maximized, costs may be reduced and there is minimal stress on the environment. In reality, however, industrial companies need understanding and real life cases to be able to plan for actions. The cases in this paper provide a window to look into same fairly common examples of energy saving possibilities that exist in the manufacturing sites and the distribution centers within a supply chain.
Simulation Study for the Performance Impacts of Video Multicast Caused by In-Cast in Cloud Computing Environment
Authors: Chen Yen Wen , Ho Yuan Sing , Sun Chung Chen
Published: July 2014

Cloud computing is becoming one of the most convenient ways for information services through network accesses. In this paper, we describe the architecture of cloud computing and discuss the issue of in-cast, which may downgrade the transmission performance when the number of simultaneous transmission servers is getting larger. The in-cast transmission may introduce the out of sequence of packet delivery and may reduce the system throughput. This paper constructs the software environment to simulate the performance of video streaming services delivered by the servers in cloud. We first examine the performance of the out of sequence issue of packet transmission when the Hashed Credit Fair (HCF) algorithm was applied and investigate the multicast performance of video streaming service with respect to the numbers of servers. With the increasing of the number of servers, we note that transmission performance is not improved, on the contrary, the system throughput downgrades sharply. We believe the simulation results of this paper will be helpful for the design of cloud video multicast services.
Construction of Cotton Seeds Quality Security Information System Based on RFID
Authors: Ma Ben Xue , Chen Jin Cheng , Zhang Wei , Yang Jie , Wang Yun Xiang
Published: July 2014

In view of fake and shoddy cotton seeds appearing constantly, it damaged the interests of the farmers seriously. Accordingly, this paper proposed a method to solve the cotton quality and safety, which combined the technology of Radio Frequency Identificaiton (RFID) and the Internet. The cotton circulation management model has been constructed, developing the cotton quality traceability system. This will not only can help consumers identify the cotton quality, but also can prevent unqualified cotton into the market so as not to protect the interests of farmers and manufacturers reputation.
A Hybrid Encryption Scheme for Hadoop Based on Symmetric and Asymmetric Encryption
Authors: Song Lei , Qin Jun , Liang Sheng Xi , Wang Xing
Published: July 2014

With the rapid development of cloud computing, Security problems has become one of the major obstacle against it. In this paper, we present a hybrid encryption scheme based on the characteristics of RC5 and ECC encryption to deal with security issues caused by data residue in static storage and Save the storage space at the same time.
Simulation of Efficient Vehicle Dispatching and Routing for the Application in Intelligent Transportation System
Authors: Chen Yen Wen , Chen Chang Wu , Chen Xin Chang , Su Addison Y.S.
Published: July 2014

This paper provides the simulation for a designed vehicle dispatching and routing system for safe and efficient vehicle transportation. The objective of the simulation is to verify the performance of the cooperative dispatching and routing decisions for vehicles within a specific area consisting of streets and several intersections. In addition to computing a specific routing path for the arrival vehicle based on its destination and safety considerations, the proposed scheme provides a detour mechanism under the transportation cost constraint. This paper also points out the existence of hidden conflicting path problems in the dispatching approach and proposes a backtracking approach to solve this problem at the route decision phase so that the travel time can be guaranteed. The simulation results show that the proposed scheme can effectively assign the vehicles with proper routes and without any collisions with good performance.
Delay-Dependent Stability of Cellular Neural Networks with Multiple Delays
Authors: Rajchakit Grienggrai
Published: July 2014

Back propagation (BP) neural network is used to approximate the dynamic character of nonlinear discrete-time system. Considering the unmodeling dynamics of the system, the weights of neural network are updated by using a dead-zone algorithm and a robust adaptive controller based on the BP neural network is proposed. For the situation that jumping change parameters exist, multiple neural networks with multiple weights are built to cover the uncertainty of parameters, and multiple controllers based on these models are set up. At every sample time, a performance index function based on the identification error will be used to choose the optimal model and the corresponding controller. Different kinds of combinations of fixed model and adaptive model will be used for robust multiple models adaptive control (MMAC). The proof of stability and convergence of MMAC are given, and the significant efficacy of the proposed methods is tested by simulation. This paper deals with the problem of delay-dependent stability criterion of delay-difference system with multiple delays of cellular neural networks. Based on quadratic Lyapunov functional approach and free-weighting matrix approach, some linear matrix inequality criteria are found to guarantee delay-dependent asymptotical stability of these systems. And one example illustrates the exactness of the proposed criteria.
3D MС Simulation of Grain Growth Kinetics and the Zener Limit in Polycrystals
Authors: Phaneesh K.R. , Bhat Anirudh , Mukherjee Gautam , Kashyap Kishore T.
Published: July 2014

Large scale Potts model Monte Carlo simulation was carried on 3-dimensional square lattices of 1003 and 2003 sizes using the Metropolis algorithm to study grain growth behavior. Simulations were carried out to investigate both growth kinetics as well as the Zener limit in two-phase polycrystals inhibited in growth by second phase particles of single-voxel size. Initially the matrices were run to 10,000 Monte Carlo steps (MCS) to check the growth kinetics in both single phase and two-phase poly-crystals. Grain growth exponent values obtained as a result have shown to be highest (~ 0.4) for mono-phase materials while the value decreases with addition of second phase particles. Subsequently the matrices were run to stagnation in the presence of second phase particles of volume fractions ranging from 0.001to 0.1. Results obtained have shown a cube root dependence of the limiting grain size over the particle volume fraction thus reinforcing earlier 3D simulation efforts. It was observed that there was not much difference in the values of either growth kinetics or the Zener limit between 1003 and 2003 sized matrices, although the results improved mildly with size.
Synthesis of Semi-Aromatic Copolyester with High Molecular Weight
Authors: Wang Jiang Wei , Xu Hua Jun , Bai Xiao Mei , Hong Fan , Wang Yan Ping , Wang Yi Min
Published: July 2014

The polymerization of para-acetoxybenzoic acid (PABA) and poly (ethylene terephthalate) to generate high molecular weight semi-aromatic copolyester was conducted successfully in the presence of acetic anhydride. The influence of acetic anhydride on the copolymerization was studied. The addition of acetic anhydride (2:1 mol AC2O /PET) in the polymerization system afforded the polymerized copolyester with an increased intrinsic viscosities (by 112.5%) and a decreased amount of insoluble fraction (by 80%). 1H-NMR analysis indicated that mole ratio of PET repeat unit and PHB was 42:58 with the addition of acetic anhydride, which was quite similar to the theoretical ratio and higher than traditional synthesized PET/PHB. The results show that the addition of acetic anhydride is effective not only in increasing the molecular weight but also in increasing benzene ring content in the copolyester.