bluuebunny/crossref_metadata_2025 huggingface dataset:
Properties of HPC with Fly Ash, Blast Furnace Slag and Silica Fume
Authors: Kim Sun Woong , Park Wan Shin , Kim Jeong Eun , Eom Nam Yong , Kim Do Gyeum , Cho Myung Sug
Published: August 2013

This paper addresses the results of an extensive experimental study on the compressive, splitting tensile strength modulus of elasticity in long-term. These tests were carried out to investigate the mechanical properties of HPC for 56 and 91days. In this work, High performance concrete was designed a water-binder ratio of 0.40. In addition, three different concrete mixes were used in these specimens. The results properties of HPC with fly Ash, blast furnace slag and silica fume were effective for compressive strength splitting tensile strength and modulus of elasticity improvement between 56 to 91 curing days.
Creep of Rheocast 7075 Aluminum Alloy at 300 °C
Authors: Thongkam Saravut , Wisutmethangoon Sirikul , Wannasin Jessada , Chantaramanee Suchart , Plookphol Thawatchai
Published: August 2013

Creep of rheocast 7075-T6 aluminum alloy produced by the Gas Induced Semi-Solid (GISS) process was investigated at temperature of 300 °C and stress range of 20-70 MPa and compared to that of wrought 7075-T651 aluminum alloy. The rheocast 7075-T6 alloy exhibited lower minimum creep rate and longer rupture time than the wrought 7075-T651 alloy. The total rupture strain of the rheocast alloy was shorter than that of the wrought one. According to the power law creep, the stress exponents, n of the rheocast 7075-T6 and the wrought 7075-T651 alloys were 5.9 and 7.9 respectively. Based on the determined n values, the creep deformation of both alloys was possibly controlled by the dislocation glide and climb-controlled mechanism.
Effects of Ni-B Addition on Microstructure and Properties of Sn-1.0Ag-0.5Cu Lead-Free Solder
Authors: Qu Jun Feng , Xu Jun , Hu Qiang , Zhang Fu Wen
Published: August 2013

The solder/substrate reactions, for Sn-1.0Ag-0.5Cu, Sn-1.0Ag-0.5Cu-0.05Ni and Sn-1.0Ag-0.5Cu-0.05Ni-0.02B, were evaluated in what concerns the melting temperature, microhardness, morphology of the solder and chemical composition of the interface layer. The phases formed at the interface between the Cu Substrate and a molten lead-free solder were studied with different stage times. The evaluation of their chemical compositions were performed by Scanning Electron Microscopy (SEM) and Energy Dispersive Spectrometer (EDS).
Comparison of Liquid Phase Sintering and Cu-Melt Infiltration Methods to Consolidate 80W-Cu Composite Using Nickel as Sintering Activator
Authors: Hafed Ibrahim , Azizan Aziz , Azmi Rahmat , Kahtan Mohammed S.
Published: August 2013

In this article, studies were conducted to evaluate the densification of W-Cu sintered compacts produced using two methods; liquid phase sintering (LPS) and combination of liquid phase sintering and liquid infiltration technique (LPS+LI) named Cu-melt infiltration (Cu-MI). Low concentration of nickel (1wt.%) was used to activate the sintering process in both methods. Isothermal sintering was carried out in alumina tube furnace at temperatures of 1150°C for 2 hr. under H2/Ar. as protective gas. The infiltration (Cu-MI) method proved to be effective in the densification, microstructure and hardness enhancement of the 80W-Cu compact as opposed to the other conventionally liquid phase sintered compacts. The relative densities of 80W-Cu-1Ni composites prepared by using insert method (Cu-melt infiltration) achieved 96.22% of theoretical density.
The Feasibility Study of Laser Particle Size Analyzer for Thick Pastes
Authors: Zhang Shuang Yu , Lv Fu Yan , Xia Zheng Meng , Li Na , Wu Miao
Published: August 2013

The particle size distribution determines the physical and chemical characteristics of the particle swarm, and then affects rheological properties and transportation resistance characteristics of the thick pastes . Therefore we should find a method to appropriately describe the particle size distribution of thick pastes. Take coal slime to represent, we contrast laser particle size analyzer test with traditional sieving test to find whether the laser particle size analyzer applies to thick pastes or not. The test shows that the laser particle size analyzer which is suitable for the thick pastes to measure their particle sizes. Although its results cant match with the traditional method perfectly, the upper limit particle size can be used as comparison parameter of both methods. In future, the particle size distribution can be directly used, and there is no need to translate it into the sieving particle size distribution.
Application of ISF Process for the Throttle Pedal Fixed Plate
Authors: Li Li Hua , Tao Long , Wang Jin , Zhao Cheng
Published: August 2013

Incremental Sheet Forming (ISF) is an emerging process. As a sheet metal forming process, it allows manufacturing components without the development of complex tools in comparison with stamping process. Although existing technical research achievements are plenty, it remains to be improved to make an industrially suitable process. This work is dedicated to the incremental forming of the throttle pedal fixed plate to analyze and figure out the reasonable practical procedure of ISF process, and helpful to promote the industrial applications of ISF.
Investigation on the Interaction between Plasticity Response and Fretting Wear under Gross Sliding Condition
Authors: Harimon M.A. , Mohd Tobi Abdul Latif , Saad A.A. , Zakaria W.M.F. Wan
Published: August 2013

The fretting wear behavior of Ti-6Al-4V is studied with the focus on cyclic plasticity effect under gross sliding condition. The analysis is simulated using finite element based method with a new surface profile model represently a given number of cycles using a cylinder-on-flat geometry. The effect of cyclic plasticity on the stresses and plastic strain distribution is studied. The maximum tangential stress is predicted at the trailing edge while the maximum compressive tangential stress is predicted at the leading edge of contact area. Plasticity in shear component is significant compare to tangential component and predicted at 0th and 3000th cycles only. It is found that important to include plasticity that remains from previous cycle for better prediction of fretting wear.
Investigation of the Effect of Solidification Velocity on the Quality of Single Crystal Turbine Blades
Authors: Rzyankina Ekaterina , Szeliga Dariusz , Mahomed Nawaz , Nowotnik Andrzej
Published: August 2013

The occurrence of high temperatures in combustion chambers of jet engines and gas turbines has led to the demand for new technologies and new materials for the manufacture of one of the most critical elements of these systems - the turbine blades. These elements have to withstand extreme temperatures for extended periods without loss of mechanical strength, conditions under which many alloys fail. Such failure is ascribed to the combination of high temperatures and high centrifugal forces, resulting in creep. This is especially prevalent in multi-crystalline structures in which grain boundaries present weaknesses in the structure. High temperature resistant alloys formed as single crystal (SX) structures offer the necessary material properties for safe performance under such extreme conditions. Modelling and simulation techniques were first used to study the directional solidification (DS) of crystal structures during vacuum investment casting. These models allowed the study of the dendritic growth rate, the formation of new grains ahead of the solid/liquid interface and the morphology of the dendritic microstructure. These studies indicated the opportunity to optimise the velocity of the solidification front (solidification rate) for single crystal structures. The aim of this study was therefore to investigate the effect of the solidification rate on the quality of SX castings. The investigations were carried out for nickel-based superalloy CMSX-4 turbine blade casts and rods using the Bridgman process for vacuum investment casting.
Mechanochemical Synthesis of Magnesium Doped Hydroxyapatite: Powder Characterization
Authors: Adzila Sharifah , Ramesh Singh , Sopyan Iis , Tan C.Y. , Hamdi Mohd. , Teng W.D.
Published: August 2013

In this study, the mechanochemical method was employed to synthesize hydroxyapatite (HA) and magnesium (Mg) doped hydroxyapatite (HA) powders. The effect of Mg2+ into the synthesized HA powder properties were investigated. Characterization of the synthesized HA and Mg doped HA at various concentrations (1% - 5% MgHA) were accomplished through X-ray diffraction (XRD) and Fourier transform infrared (FTIR) analyses. nanosize of HA and Mg doped HA powders were successfully synthesized through the present method as indicated from the different peaks intensity and adsorption bands obtained in XRD pattern and FTIR respectively.
The Surface and Interface Microstructure of Epitaxial Pr0.7Sr0.3MnO3/La0.5Ca0.5MnO3 Bilayer Structure
Authors: Wang Haiou , Liu Hao , Cao Meng Xiong , Tan Wei Shi , Dai Ping , Zhang Yun , Gao Qian , Jia Quan Jie , Wu Xiao Shan
Published: August 2013

Epitaxial bilayer structure consisting of ferromagnetic (FM) metallic Pr0.7Sr0.3MnO3 (PSMO) and antiferromagnetic (AFM) insulator La0.5Ca0.5MnO3 (LCMO) was fabricated on (001)-oriented single crystal SrTiO3 (STO) substrate by pulsed laser deposition technique. We studied the surface structure and interdiffusion at interface between PSMO and LCMO by using atomic force microscope and grazing incident x-ray reflectivity (GIXRR). The perfect data fitting result of GIXRR indicated that interdiffusion at the interface of Pr0.7Sr0.3MnO3/La0.5Ca0.5MnO3 (PSMO/LCMO) could not be negligible; there was a large interdiffusion zone at the PSMO/LCMO interfaces with a thickness of about 7 nm. We found that the thickness of the top layer at air/PSMO interface was about 2.5 nm and the mass density of the top layer was about 76.53% of that of PSMO layer. The surface roughness was about 1.6 nm which was consistent with observation by atomic force microscopy. Normal X-ray diffraction (NXRD) was also employed to investigate the average structure. Except from PSMO and LCMO layer diffraction peaks, we observed another additional peak, which was developed from the large disordered layer resulting from interdiffusion at the interface of PSMO/LCMO. This implied that the variation of crystalline structure of PSMO/LCMO film occurred due to interdiffusion. Surface roughness and interdiffusion played an important role in magnetic properties of FM/AFM bilayer.
Fault Diagnosis on Transmission System of Wind Turbines Based on Wavelet Packet Transform and RBF Neural Networks
Authors: Wang Xiao Yun
Published: August 2013

Wind turbine transmission system with abundant fault feature and variable types, the vibration signal was a carrier of fault features and it can reflect most of the fault information in the wind turbine transmission system. As there were a large number of transient and non-stationary signals accompany with the vibration signals, so wavelet packet transform was adopted for feature extraction. As RBF Neural network has a strong nonlinear mapping ability and self-adaptability, so it was introduced to the diagnosis system for network training, the neural networks structure and learning algorithm was presented, which could enhance the accuracy of diagnosis. The two-level neural networks recognition method was proposed, first level for fault classification and second level for fault diagnosis. The example shows that this method can be effectively applied to transmission system of wind turbine fault diagnosis with wavelet packet algorithm for fault feature extraction and RBF neural network for pattern recognition.
An Evaluation Method for Water Quality Based on the Improved SOM Neural Network
Authors: Li Hong Yi , Li Ze Xi , Wang Chao Jie , Han Yuan Feng , Zhao Di , He Jing Cheng
Published: August 2013

In recent years, people have been paying increasingly attention on monitoring the quality of drinking water, which becomes rather necessary after natural disasters such as the Beijing 7.21 rainstorm, considering that the drinking water is one of the main medium for epidemic spreading. Most of the existing evaluation methods have their bases on concise mathematical models, which often fail to describe the complex essential nonlinear relations between the water quality and the chemical material in it. In this paper, we propose the evaluation method by using the SOM neural network, a unsupervised method that is able to classify, and therefore evaluate, given water samples. In order to promote the convergence rate and the precision of SOM neural network when dealing with high dimensional and highly correlated samples, we add a PCA preprocessing procedure. Experiment results demonstrate that the improved SOM neural network could evaluate the water quality with high precision.
Particle Swarm Optimization of a Fuzzy Logic Controller for a Mobile Robot Tracking a Moving Target
Authors: Benbouabdallah Karim , Zhu Qi Dan
Published: August 2013

Target tracking is one of the interesting tasks of mobile robots navigation. This paper presents a fuzzy logic controller (FLC) for a mobile robot chasing a moving target. The proposed control strategy computes both the linear and angular velocities of the robot in order to regulate its perceptual state according to the targets motion. Then, a particle swarm optimization (PSO) algorithm is applied to tune the scaling factors of the FLC for a better performance in term of target tracking. Simulation results demonstrate the effectiveness of the proposed control approach.
Passenger Flow Prediction Based on Particle Filter Optimization
Authors: Cao Lei , Liu Shu Guang , Zeng Xian Hua , He Pan , Yuan Yue
Published: August 2013

The article aims at making scientific and accurate prediction of the current flow of passagers based on its characteristics, which is nonlinear and is influenced by various factors. Clustering is used to make classification of IC card data.Then ARMA prediction model is installed and the model parameter is worked out through matrix method and revised by the method of particle filtering. Resampling is also conducted through genetic optimization. The data of rail transit of Chongqing City of June, 2012 is used to make verification.The result shows that the prediction of optimize parameters through the method of particle filtering is close to the real values. The MAE is 0.8154,MAPE is 1.755,so this method in our article can make the prediction of passenger flow volume more accurately.
Cluster Deployment System Based on Qt and xCAT in Linux
Authors: Liu Fang , Wu Qiong , Qian Zhi Jun , Dong Yu Hong
Published: August 2013

The cluster technology is used more and more widely in fields of oil exploration, aerospace engineering, biological engineering, etc, the application requirements of different type nodes make cluster system harder and harder to manage in the cluster environment. In the paper, with the conception of cluster technology, applying xCAT+shell and Qt platform in Linux, the cluster deployment system has been designed and implemented to configure and distribute centrally different types of nodes in the cluster.
The Research for Control Strategy of Low Voltage Ride-through Based on DFIG
Authors: Sheng Si Qing , Li Huan , Fan Lin Tao
Published: August 2013

The doubly-fed wind power generation system containing crowbar protection circuit will change from reactive power source to reactive power load during the low voltage ride-through, which is likely to aggravate burdens to the fault system. Aiming at solving this problem, the paper will introduce the STATCOM compensation device, and put forward a comprehensive control strategy. Under the coordinated control strategy, the STATCOM will cooperate with the compensation capacity of the doubly-fed generator to support the reactive power. The voltage at point of common coupling will be raised and the ability of low voltage ride-through of the wind turbines will be improved. A simulative model of doubly-fed induction generator is established in MATLAB and the strategys rationality and effectiveness will be verified by the simulative results.
Adaptive Dynamic Sliding Mode Control Based on Offshore Variable-Speed Variable-Pitch Wind Turbines
Authors: Li Sheng Shan , Yang Feng , Wang Lei , Song Yong Duan , Zeng Yu
Published: August 2013

An adaptive dynamic sliding mode pitch control strategy for the output power control of wind generation systems in above rated wind speed range is presented in this paper. The corresponding controller is designed, which consists of an adaptive dynamic sliding mode controller, virtual damping controller. These variable pitch control systems have several advantages over the traditional wind turbines, such as reduction of the mechanical stress, improve quality of electric energy and mitigate tower fore-aft vibration and gearbox vibration. Traditionally, wind turbine pitch control system using mainly proportional integral (PI) controller. However, such kind of controller does not adequately handle some inaccuracies mainly leading to non-optimal power factor. These may decrease wind turbine performances. Therefore, using robust control and additional sensors to help the controller to achieve its objects more effectively, such as adaptive sliding mode control, damping controller will allow to tuning the wind turbine rated power to improve power quality. Finally, simulation results are demonstrated to validate the proposed controllers.
Soft Failure Analysis of Metro Vehicle Charger Circuit
Authors: Shen Tao , Wu Hao , Li Xiao Bo
Published: August 2013

Failure prediction is of great significance for power electronics systems. Taking the metro vehicle charger circuit as an example, soft failures are discussed. The paper established the system simulation model through MATLAB/SIMULINK, and carried on spectrum analysis with POWERGUI module, and analyzed system output when the parameter changed. With regard to charger circuit, the inductor should be replaced when the inductance drops to 1/2 of the normal. It is important for the on-site maintenance personnel to troubleshoot failures, improving the working reliability of metro vehicles.
Design of Executing ELF Files for ARM Based Multi-Process Mono-Kernel Embedded OS
Authors: Qu Bo
Published: August 2013

This paper describes the design and implementation of executing ELF files on an ARM based multi-process mono-kernel embedded operating system, including overview of ELF files, and key techniques of loading and executing ELF files. At the final, the paper provides some demo examples to show the effects of a simple shell interpreter and typical shell commands, echo, date, and pwd. The entire embedded operating system including the routines of executing ELF files are developed by the author of this paper on Linux with GNU tool chain, based on which more powerful shell interpreter and shell commands analogous to that of embedded Linux can be designed.
Research on Personalized Courseware Recommendation System of Rural Distance Learning Based on Combination Recommendation Technology
Authors: Guo Jian Xin , Zhao Ji Chun
Published: August 2013

This paper proposed a model of combination recommendation, focusing on analysis and comparison of content filtering recommendation technology and collaborative filtering recommendation technology based on the mainstream personalized recommendation technology, and the model working process is given. For how to solve the problem of sparse and cold start, the paper gave the solve methods, and discussed the process of combination recommendation algorithm, and then introduced a method of developing and designing personalized courseware recommendation system of rural modern distance learning, and introduced the optimization measures of functional modules and performance. It provides a useful reference for distance education site to carry out personalized training services for rural adult users.
Novel Private Matching Protocol Suitable for Cloud Computing
Authors: Wang Jian , Qi Xiao Yu
Published: August 2013

In cloud computing users always hope their identity can’t be disclosed while they access the cloud service. Although there are many research focus on the security issue in cloud, none work has been carefully addressed about the proposed problem. To allay users' concerns of disclosure of their identity, we proposed a novel approach based on private matching protocol to protect users’ sensitive information in cloud computing. Besides, this paper also states the new problem of privacy indexing in the internet and proves that our proposed protocol can avoid privacy indexing in the cloud.
Study on the Application of Desktop Cloud to Confidential Information System
Authors: Zhang Jian
Published: August 2013

With the development of the computer technology and the increase of the distributed computing need, cloud computing gradually becomes the research hotspot in the IT domain. As an important application of cloud computing technology, desktop cloud has been used in many domains due to its unique characteristic, especially the dominance in security and flexibility. Based on analyzing the characteristic of cloud computing and desktop cloud, makes some research on the application of desktop cloud to confidential information system, and describes the architecture framework, running mode and operation characteristic in detail.
Research and Application of Resource Information of Tree Growth Management
Authors: Han Guo Dong , Li Xin Qiang , Duan Xian Hui , Liu Xu Ning
Published: August 2013

In order to grasp the related information and parameters needed by the tree growth, and management, establish the authentic decision-making model of tree growth management using the effective resource information, the resource information of tree growth management are investigated from the perspective of ontology and knowledge base technology. The paper introduces the ontology and knowledge base technology, adopts the knowledge organizing pattern based on ontology, studies the structure and technique of knowledge of tree growth management, the ontology is regarded as the knowledge organizing pattern to establish the open knowledge base of tree growth management, and constructs the management model of tree growth. Practice has proved that the research and application of ontology in the resource information of tree growth management has important value for the model construction of tree growth management, achieves the sharing of resource information of tree growth management.
Wheeled Robot Based on Fuzzy Neural Network Tracking Studies
Authors: Zhang Su Ying , Xu Shao Jie , Zhu Jing Fei , Li Bing Hao , Shi Wen Pan
Published: August 2013

The wheeled robot with non-integrity constraints is a typical nonlinear system, in order to achieve the ideal path tracing, presented a theory based on fuzzy neural network control. Centralized compensation system based on neural network uncertainty can be arbitrary-precision approximation of continuous nonlinear functions as well as the complex uncertainties with adaptive and learning ability. By MATLAB simulation showed that the control method to ensure fast convergence and error robustness of parameter uncertainties and external disturbance.
An Interactive Education Information Administration Platform Based on .NET and WAP
Authors: Zhang Xiao Ming , Ma Teng Fei , Chen Zhan Fang , Wang Huan , Chen Qi Chang , Feng Xin
Published: August 2013

An interactive education information administration platform based on .NET and WAP is presented. In this platform, the users can use the WAP-capable devices such as cell phones or PDA to perform the operations such as course inquiry, grade inquiry, online registration, online sign-up and information browsing anywhere anytime they want.
Analysis of Illumination Nonuniformity in Optical Imaging System
Authors: Liu Bin , Wang Li Ming , Zhao Xia
Published: August 2013

In order to study the influence by non-uniformity of illumination on testing performance of optical measurement system, the causes of non-uniformity were analyzed. We constructed the relationship model between interval distance of LED light source and illumination. The distribution of illumination with different intervals of LED were simulated. Then relationship model between viewing-field angle at object plane of optical system and illumination was established. Influence of viewing-field angle at object plane on distribution of illumination was studied. The experimental results indicate that non-uniform light source and wide viewing-field angle are two main causes for non-uniformity in optical imaging system. Larger interval distance of LED or viewing-field angle will result in non-uniformity of illumination.
Open Network Recharge System Architecture for Public Transportation Card
Authors: Su Hao Wei , Wen Xiao Li , Cai Jin Long , Zou Da Bi
Published: August 2013

In this paper, we propose an open network recharge system for public transportation smart card user to complete recharge. The network recharge system is mainly to cater the urgent need of providing convenient smart card recharge services. The proposed system is consisted of smart card secure reader, network platform and operator system. In order to take advantages of these three components, this paper will pay attention to security scheme and data transmission protocols of the proposed system. The security scheme promises the safety of transactions and data transmission. And the data transmissions protocols help complete the interactions among these three components.
Research on the Spring-Back Compensation Method of Tailor Welded Blank U-Shaped Part
Authors: Liu Xiao Jing , Zhang Miao , Huo Xue Huan , Ge Xi Jun , Liu Bo
Published: August 2013

Tailor welded blanks stamping forming technology of automotive panels has been widely used in the lightweight of automobile. The simulation research on forming and spring-back of tailor welded blank U-shaped parts was done to analyze the influence of various parameters on the spring-back and find a way to improve forming properties of tailor welded blank U-shaped parts. The optimal analysis method of combining numerical simulation with experiment was adopted to explore the influence of compensation factor on the forming precision. Finally, a reasonable initial iteration compensation factor was found to compensate the mould surface directly. Aiming at forming characteristics of tailor-welded blanks, a segmented compensation method was proposed and used on the U-shaped parts which can improve the precision of components effectively.
Regeneration of Activated Carbon Fiber Using Microwave under Vacuum Condition
Authors: Feng Quan Li , Wang Chen Xu , Wang Xue Qian , Ning Ping
Published: August 2013

The purpose of this work was to explore the application of microwaves for the regeneration of activated carbon fibers saturated with ethanol under vacuum condition. The efficacy of the regeneration was analyzed by the rate of desorption and mass loss. When the microwave power was 680W , the dosage of activated carbon fiber was 3.5g , the degree of vacuum is 0.05MPa and the microwave irradiation time was 180s, the desorption rate was up to 95.3% and the outlet concentration of ethanol was 97.5%. The adsorption of activated carbon fiber after microwave regeneration for many times was larger than the fresh activated carbon fiber. And the rate of total mass loss was 3.54%.
Application of Scene Simulation Technology to the Walkthrough System
Authors: Lv Hong Yan , Liu Fang , Lin Lin
Published: August 2013

In this paper, the application of Scene Simulation technology to walkthrough is introduced in detail, and two key links of system implement with the scene simulation technology are analyzed, which are the construction of three-dimensional model and the implement of the walkthrough drive engine. MultiGen and OpenGVS are selected to be the walkthrough system development platform. The whole system realization from the construction of three-dimensional model to implement of the walkthrough drive engine is discussed particularly.
The Research on Real-Time Simulation of Wavers Based Parallel DSP System
Authors: Li Ying , Qiu Jing
Published: August 2013

3D ocean wave simulation has long been hot issues in the field of computer graphics and real-time simulation and has practical significance in many areas of society. Complexity and randomness of the waves led to large areas of ocean wave simulation calculation exists for compute-intensive, low efficiency, memory requirements and other limitations. In response to the phenomenon of a decline in real-time with the fidelity lifting, this paper proposes a parallel simulation method, in which the wave data is calculated by each DSP and the results will be stitched as large ocean area. Experimental results show that the multi-DSP parallel processing method can satisfy the feeling of reality and real-time requirements of the waves at the same time, which will improve the system real-time performance without loss the wave details.
Research on Electric Power Distribution Method
Authors: Zhou Hua Ren , Qian Yue Hong , Yao Ze Qing , Mao Zi Sen
Published: August 2013

According to the unit price, the section capacity section and the data of ramp rate, in accordance with the electricity market rules, the pushing method and optimal search model of the next time the output of the unit distribution plan are established.
Two Quantity Estimation Models of Mineral Resource Potential Area
Authors: Liu Bing , Lu Lai Jun , Zhang Jia Tong
Published: August 2013

The estimation of the mineral resources area (target area) number is an important part of mathematical geology. Total resource depends not only on the scale of the single target mineralization but is also proportional to the number of target area. In this paper, the target area quantitative algorithm was studied based on the domestic and abroad opinions. The Petersen capture model and Poisson model were introduced into the estimation of resource maternal capacity. In order to meet the requirements of the two models, sampling plan were re-designed and improved. Take 1/200,000 gold mines and metal (Cu, Ag, Pb, Zn) mineral resources prediction in Hebei Province as an example, two practical estimation models of the resource maternal capacity were established. Calculation shows that the results of Petersen capture model and Poisson model were similar and can be as an effective predictor of district resource capacity. Therefore, the bottleneck of regional resource total forecasting calculation method is solved.
A QoS Routing Protocol Based on ACO in Wireless Multimedia Sensor Network
Authors: Wan Jun , Li La Yuan
Published: August 2013

In view of the complexity, higher power consumption and other shortcomings of current wireless multimedia sensor networks (WMSN)QoS routing protocol algorithm, this paper proposes the Ant Colony Optimization (ACO) to improve the WMSN routing protocol. First of all, a routing model for multimedia sensor networks QoS was presented and then a routing algorithm (WMSN-ANT) was brought forward, which uses the network restrict condition to update the pheromone concentration. The forward ants (Fant) collects the link bandwidth, delay, packet loss rate and other parameters, along with the elite strategy for the ant system to update the local node of the network state model and the pheromone of each visited node in order to find the best routing under the conditions of multiconstrained QoS. The simulation results show that the algorithm is characterized by the distributed network routing optimization and has better convergence than the traditional QoS routing protocol and can significantly improve the network lifetime.
Design of Velocity Measuring System of Car Based on MCU
Authors: Yu Jing Sheng , Sun Hong Qiang
Published: August 2013

It describes the basic principle of velocity parameters measuring of car in operation, establishes the related mathematical model. It disigns an intelligent, integrated digital solutions to combination instrumentation of the car based on MC9S12DP256B. This system has advantages of high performance, high precision, low cost, low power consumption, good stability, sensitive respond and expandability. The system measures and shows online velocity parameters of the car. It has fuction such as safety alarm. The system reserves bus interface such as SCI and CAN, correspondences easily with other electronic engine control systems of the car.
Storm Surge Magnitude Grading - A Case in Zhejiang, Fujian and Guangdong Province
Authors: Zhao Ling Di , Zhang Teng
Published: August 2013

Storm surges have a hazardous influence on coastal regions, threatening infrastructures, ecosystems and human lives. A statistical study of storm surge magnitude makes it possible to determine the severity, and therefore better forecast and prevent losses. However, the assessment and grading remain controversial in academia. A storm surge grading system was designed based on data in Chinas coastal provinces of Zhejing, Fujian, Guangdong over the period 2003-2010 in this paper. Related variables include social factors, such as affected farmland, direct economic losses; and natural factors, like wind speed, maximum rainfall. Cluster analysis, Entropy method and factor analysis are applied to determine the detail and specific grading. This grading gave a better insight into the disaster and better forecast and control.
The Effect of Focus on the Realization of Intensity in Chinese
Authors: Wang Mao Lin , Huang Xue Jiao
Published: August 2013

In this paper, the average intensity and the effect of focus on it for disyllabic words in Chinese is analyzed. It is found that, the average intensity of rhyme in the first syllable is comparatively great, while for the onset, due to intervocalic voicing, that in the second syllable is great. Focus has great effect on intensity. Analysis shows that, compared to the onset and the first syllable, the effect on the rhyme and on the second syllable is great.
A Design of a Speech Conversion System from PuTongHua to Cantonese Based on iFLY MSP 2.0
Authors: Ma Rong Gui , Liu Fang Zhou
Published: August 2013

The paper analyzes the working theory of a Speech Conversion System from PuTongHua to Cantonese based on iFLY MSP 2.0. In the system, QISR interface is chosen to complete speech recognition function which is the key technology to convert the voice information into the corresponding text information. Moreover, the QTTS interface is chosen to complete the text to speech function which is the key technology to transform the text which is the result of the speech recognition into the spoken information in Cantonese and then output. Finally, the computer assisted learning system is designed successfully in the environment of Visual C++ 6.0.
Feature Extraction of the Acoustic Emission Signals of Low Carbon Steel Pitting Corrosion Based on Independent Component Analysis and Wavelet Transform
Authors: Li Wei , Gong Yu Li , Yu Yang
Published: August 2013

Based on the characteristics of the acoustic emission (AE) signals from low carbon steel pitting corrosion, a new extraction method was proposed with wavelet transformation and independent component analysis. The experiment result shows that the new method can overcome the influence induced by the uncertainty of the independent source of low carbon steel pitting corrosion and good extraction result can be achieved.
A Novel QO-STBC Scheme with Linear and Single-Symbol Decoding
Authors: Jin Li Biao , Guo Jun , Zhang Jian
Published: August 2013

In this paper, a quasi-orthogonal space time block coding (QO-STBC) scheme with maximum likelihood (ML) decoding via simple linear and single-complex-symbol detection is proposed. We present a fast and simple linear decode processing by embedding a transformed signal space. The method benefits from the reduced maximum likelihood decoding complexity via the pre-interleaving to QO-STBC. We also proposed codes with 3/4 of the full transmission rate for the specific cases of 8 transmit antennas. Finally, the numerical results show the proficiency of our design procedure, demonstrating that significant improvements in BER are achievable when the rate or receive antennas increases.
Research on Design of Remote Computer Room Monitoring System
Authors: Zhao Xue Feng
Published: August 2013

In order to solve the problems of remote management on computer room for campus networks, OPC technology is introduced into the design of remote monitoring system for campus computer room. The application of OPC technology can improve the interoperability and adaptability among buses, and reduce the repetitive work of multi-bus system data in the process of the integration, so as to make computer room management more effective, and make the system update and integration become more convenient. Especially in the special environment, the application of OPC technology plays an instructive significance and reference value to unattended management and the remote fault diagnosis and maintenance.
Experimental Studies on Subgrade Failure Detection of High Density Electrical Method for Opening Road
Authors: Li Zhen Cun , Zeng Sheng , Guo Xin , Wei Hui
Published: August 2013

By experiment,adopt clay as the transfer medium between copper bar and pavement,change the grounding mode of electrode,high density electrical method was used for subgrade failure detection. The experiment result show that this method can control all most ground resistance within 10KΩm and the subgrade failure can be detected. Because of the electrode grounding area is larger and the resistivity is higher,caused the inversion result has some error. This conclusion of experiment can provide reference for subgrade failure detection of high density electrical method for opening road.
Study on Method for Real-Time Vibration Signal of Shearer Acquisition
Authors: Ji Xiao Dong , Yang Zi Xian , Li Xu , Xue Guang Hui , Wu Miao
Published: August 2013

In order to acquire and analyze the real-time vibration signals of shearer in the process of coal mining. This experiment used the portable vibration measurement data recorder, which developed by ourselves. We design a comprehensive set of solutions for data acquisition according to underground mining machines working in real time. Through the data collection package, obtained a shearer vibration signal sample on real-time working. Meanwhile, analyze the vibration signal using signal analysis method. Through the experiment we acquire vibration signals of shearer's ranging-arms on real-time working, and the analysis results indicate that data collection solution is reasonably practicable.
Nonlinear Analysis of the Motion Structures
Authors: Wang Ren Zuo , Chen Shih Hung , Lin Bing Chang , Huang Chao Hsun , Wang Chung Yue
Published: August 2013

In this paper, the nonlinear analysis of the motion structures is studied by using the vector form intrinsic finite element (VFIFE, V-5) method. The main object of this research is to develop an internal hinge of two ends of the plane frame element. In this study, the hinge function of frame element is used to compute the nonlinear dynamic responses of the motion structures. A fictitious reversed rigid body motion can be used to separate the rigid body motions and the pure deformations of the frame element. It is not requires any iteration or any parameters for the VFIFE method during computation process. Four examples illustrate the accuracy of the proposed procedures in computing large motions of a flying flexible structure.
Multisensor Covariance Intersection Fusion Kalman Filters
Authors: Qi Wen Juan , Zhang Peng , Deng Zi Li , Gao Yuan
Published: August 2013

For multisensor system with colored measurement noises, the common disturbance noises and measurement biases, the batch covariance intersection fusion (BCI) Kalman filter and the sequential covariance intersection fusion (SCI) Kalman filter are presented, which can avoid the computation of the local filtering errors and reduce the computational burden significantly. Under the linear unbiased minimum variance (ULMV) criterion, the three weighted fusion Kalman filters (weighted by matrices, scalars or diagonal matrices) are also presented. Their accuracy relations are analyzed and compared. Specially, the accuracy of the proposed covariance intersection fusion Kalman filters are higher than that of each local Kalman filters, and is lower than that of optimal fuser weighted by matrices. The geometric interpretation of the accuracy relations is given by the covariance ellipses. A Monte-Carlo simulation example for a tracking system verifies the correctness of the theoretical accuracy relations.
Effect of Thermo-Mechanical Treatment (TMT) on Hardness of Heat-Treated Al-Mg-Si (6082) Alloys: Experimental Correlation Using (DOE) Method
Authors: Tash Mahmoud M. , Alkahtani S.
Published: August 2013

The present study was undertaken to investigate the effect of Thermo-mechanical Treatment (TMT) on aging and hardness of Al-Mg-Si (6082) alloys. The effect of cold work after solution treatment, aging time and temperature on the microstructure and hardness were studied. Hardness measurements were carried out on specimens prepared from 6082 alloys in the as solution treated specimens and heat-treated conditions, using different cold work percentage before aging treatment. Aging treatments were carried out for the as solution treated specimens (after quenching in water) as well as for the as cold worked specimens (after solution treatment and quenching in water). The specimens were aged at different conditions; Natural aging was carried out at room temperature for different periods of time. Artificial aging was performed at 100 °C, 150 °C, and 200 °C for various times. It is noticed that cold work, following solution treatment, accelerates the precipitation rate leading to a rise in strength.A statistical design of experiments (DOE) approach using fractional factorial design was applied to determine the influence of controlling variables of cold work and heat treatment parameters and any interactions between them on the hardness of 6082 alloys. A mathematical model is developed to relate the alloy hardness with the different metallurgical parameters i.e. Cold work prior solution heat treatment (CWBSHT), Cold work after solution heat treatment (CWASHT), Pre-aging Temperature (PA T0C), Pre-aging time (PA t h), Aging temperature (AT0C), Aging time (At h), Cold work after aging treatment (CWAAT), Annealing temperature (An.T0C) and Annealing time (An.t min) to acquire an understanding of the effects of these variables and their interactions on the hardness of Al-Mg-Si 6082 alloys.
Fatigue Crack Initiation Mechanism of Aluminium Alloy Welded Joint in Gigacycle Fatigue
Authors: He Chao , Cui Shi Ming , Wu Yan Zeng , Luo Ze Fu , Wang Qing Yuan
Published: August 2013

Ultrasonic fatigue test was performed on 5052 aluminium alloy welded joint to investigate the very high cycle fatigue properties and the fatigue crack initiation mechanisms with the help of microhardness tester and scanning electron microscope (SEM). The results showed that the hardness of fusion zone was higher that base metal and heat affected zone, which led to the embrittlement of welded zone. Fusion zone became the weakest part of welded joint under cyclical loading. Fatigue crack usually initiated from the pores beneath the surface from the SEM observation of fracture surface. The influence of pores on the fatigue crack initiation was analyzed to figure out the deterioration of fatigue strength for welded joint as compared with base metal.
Effect of Surface Preparation by Non-Directional Grinding on Properties of AISI D2 Plasma-Nitride Layer
Authors: Rajsiri S. , Kraiha T. , Plangklang L. , Chairue U.
Published: August 2013

This research studies the properties of plasma-nitride coating on AISI D2 tool steels prepared by non-directional grinding at various finishing. In the manufacturing process, the AISI D2 was machined to size and hardened with a typical hardening process. In addition, its surface was treated with plasma nitriding. Various levels of roughness were produced as well as possible affects on the nitride coating properties. In this study, the following five conditions of grinding were performed on the hardened specimens: 1-µm diamond particle and four SiC grinding papers: P100, P240, P800, and P2500. The surface finishing with at least 0.023-µm roughness value (P800 grinding) provided a plasma-nitride layer with a moderately good hardness profile and a thick nitride layer compared with other finer finishing. This finishing process was also more economical requiring less time and manpower to create than others. Overall, this study suggests that finer surface finishing has a tendency to significantly improve the tool steels hardness profile and hardened depth.
Analysis and Modeling of Wafer Thermal Transfer in a PECVD Reactor
Authors: Xia Huan Xiong , Xiang Dong , Mou Peng , Zhang Han
Published: August 2013

The temperature distribution in the reactor, especially on the surface of the wafer, is the important factors influencing the chemical reaction in CVD and PECVD process. This paper focused on a typical cylindrical PECVD reactor carrying with a wafer, and established the combination calculation model, which divided the chamber system into two calculation domains according to the rarefied degree of the gases. A one-dimensional thermal model was developed to calculate the temperature profiles in the narrow gap between the wafer and the heater, considering the heat conduction, radiation and thermal accommodation phenomenon between the gas and the surfaces in low pressure conditions; a two-dimensional axisymmetric model was applied to calculate the temperature profiles in the chamber above the wafer, considering the heat conduction, radiation and mass transfer. We verified the validity of the model through the experimental measurement in different pressure with the aluminum matrix pedestal and the one without. The experiment and numerical calculation both pointed out that there are 15~30K temperature drop in the narrow gap between the wafer and heater with the pressure of 1~10Torr at the outlet of the chamber, the mass flow of 5000sccm at the inlet, and the fixed temperature of 673K within the heater. The lower the pressure was, the greater the differences were, and it presented a negative exponential relation. In addition, this paper predicted the response of the wafer surface temperature to the change of the narrow gap height and chamber pressure via numerical calculation model. The results showed a negative linear relationship between the wafer top surface temperature and the narrow gap height. When the narrow gap height was changed in the range of 0.15~2mm and chamber pressure of 1~10Torr, the temperature of wafer will drop 0.5~5.5K.
Designing Fuzzy Backstepping Adaptive Based Fuzzy Estimator Variable Structure Control : Applied to Internal Combustion Engine
Authors: Nekooei Mohammad Javad , Jaswar Koto , Priyanto Agoes
Published: August 2013

A Multi Input Multi Output (MIMO) fuzzy estimator variable structure control (VSC) which containing an on-line controller coefficient tuned with the aim of a fuzzy back stepping algorithm. Satisfactory trajectories tracking among the internal combustion engine (IC engine) air to fuel ratio and the preferred input is certified in this paper. The fuzzy controller deployed in developed fuzzy estimator variable structure controller works using Lyapunov fuzzy inference system (FIS) with least model based rule base. Function among variable structure function, error and the error’s rate is represented by model. The outputs show fuel ratio. The fuzzy back stepping tactic is an on-line variable structure function fixing with the aim of an adaptive approach. MIMO fuzzy estimator and VSC performance with an on-line fuzzy back stepping algorithm (FBAFVSC) tuned with the aim of controller coefficient is confirmed using a comparison with VSC and planned approach. Simulation outputs indicate excellent presentation of fuel ratio in attendance of ambiguity and exterior annoyance.