bluuebunny/crossref_metadata_2025 huggingface dataset:
Passenger Vehicle Clutch Reliability Optimization Based on the Stress-Strength Interference Model
Authors: Yan Zheng Feng , Li Gai Hua
Published: February 2014

With the progress of automotive engine technology, more strict requirements such as comfort, durability and more compact installation space are proposed to automotive transmission system. The failure rate of passenger car clutch is still high and its reliability has troubled users and manufacturers. The paper adopted system engineering analysis method for reliability analysis and optimization of passenger car clutch based on the stress - strength interference model. Compared with actual cases, probability and statistics theory is used to compare the failure rate and reliability, and the method is verified feasible. The method also can be applied to other dry friction type mechanical transmission system.
Modularization Technology Development Prospects
Authors: Wei Yan , Wang Dong Feng , Liu Ji Ying , Yu Cheng Long , Cheng Tao , Zhang Ding Guo
Published: February 2014

Describes the historical background of modular construction technology, focusing on the development of power from a modular, development history, comparative advantages and disadvantages of other aspects of the study was to investigate, and thus the modularization of the prospect.
Competitive Precipitation Behavior between T1 and Σ Phases in an Commercial Al-Cu-Li Alloy
Authors: Fan Li , Han Wen Ke
Published: February 2014

The competitive precipitation behavior between T1 and σ phases in Al-Cu-Li alloy was studied by hardness test, XRD and TEM observation. The hardness test results show that the changing curves are related to the densities of vacancies and dislocations, and competitive precipitation between age hardening precipitates. T1 phases give rise to the rapid age hardening. XRD results indicates that there exists an alternation increase in peak value of diffraction intensity ranged from 40 to 45° of the aged alloy for various ageing time. About four precipitation sequences occur during ageing of Al-Cu-Li alloy, including δ', θ, T1 and σ sequences. Competitive kinetics between T1 and σ phases result in the phenomenon of different precipitation behavior.
Cyclic Stress-Strain Response and Martensitic Transformation Behavior for Type 304 Stainless Steel
Authors: Hamasaki Hiroshi , Ishimaru Eiichiro , Yoshida Fusahito
Published: February 2014

Stress-strain responses of type SUS304 stainless steel at large strain under uniaxial tension and cyclic loading were investigated with special reference to plastic strain induced martensitic transformation. From the experiment it was found that the martensitic transformation plays an important role for the workhardening of the material at large strain, and a new finding from the cyclic experiment is that the stagnation of martensitic transformation appears at an early stage of reverse deformation. The evolutions of martensite volume fraction during monotonic and cyclic deformations were calculated by Stringfellow model, and it was found that the model is accurate enough for predicting the martensite volume fraction vs. plastic strain curve under monotonic loading case. On the other hand, it significantly overestimates the evolution of martensite volume fraction in a cyclic deformation.
Metal Surface Fatigue Detection Using Nonlinear Ultrasonic
Authors: Yan Hong Juan , Xu Chun Guang , Lin Qi , Cai Hai Chao
Published: February 2014

Based on theory of ultrasonic nondestructive testing on surface fatigue damage of metal components, the wave law of ultrasonic nonlinearity caused by fatigue is studied. When there are lattice defects in metal material, second-order nonlinear coefficient β changes during ultrasonic propagation. According to the point, the system of nonlinear ultrasonic testing is build. The change trends of harmonic amplitudes and ultrasonic coefficients are measured during fatigue bending testing of materials such as 45 steel, 2024 aluminum alloy and 304 stainless steel. The results shows: in elastic phase, the ratios of harmonic and fundamental waves monotonically increase with fatigue life, and in plastic phase, deformations appear and micro-cracks expand into macro-cracks in materials, the ratios firstly decrease and then increase with fatigue life. However the quadratic sums of nonlinear coefficient are approximately linear with the fatigue life. Therefore, when the relationship between the quadratic sums and fatigue life is known, it can be used to characterize fatigue state of metal materials.
The Influence of Electrical Resistivity Array on its Soil Electrical Resistivity Value
Authors: Zainal Abidin Mohd Hazreek , Saad Rosli , Wijeyesekera Devapriya Chitral , Ahmad Fauziah , Ismail Nur Azwin
Published: February 2014

Electrical resistivity technique has become a popular alternative tool by the geotechnical engineers in subsurface investigation. This study presents the influence of soil electrical resistivity value (ERV) due to the different types of electrical resistivity array used in practice. The dissimilarity of ERV was become a popular debate by the engineers which posses less fundamental knowledge in this area. In the past, the theory of electrical resistivity technique was less being discovered by the engineer which creates lots of black boxes during the utilization of electrical resistivity method (ERM) in engineering purposes. Hence, the result which produced from the ERM was difficult to deliver in a sound of definitive ways due to lack of knowledge and experienced of most engineers. Hence, this study presents the influence of soil ERV due to the different types of array used with particular reference to as Dipole-dipole and Pole-dipole. A line of electrical resistivity imaging was performed on small embankment of sandy and lateritic soil with different types of array using ABEM SAS (4000) equipment. Three in line of soil samples were tested for moisture content (w) test immediately after the electrical resistivity data acquisition was completely measured. Moreover, particle size distribution test also was performed for all soil samples in order to support the findings. It was found that the ERV was never be the same for each types of array used even on the same particular location of the survey line. However, it was found that there was a consistent relationship between ERV and moisture content for both types of soil tested which can be represent by ERV 1/w. Hence, it was found that ERV produced was relative to the types of array used during the field measurement. Each types of array were applicable to be used in subsurface profiling and its selection was subjected to the target of interest.
Differential with an Integrated, Newly - Developed Two-Stage Transfer
Authors: Halko Jozef , Maščeník Jozef
Published: February 2014

This paper describes of the principle differential on the basis two-stage gear with one main input shaft and one secondary input shaft and two output shaft.
Numerical Study on Internal Nozzle Flow Characteristic of Injector under Hot Fuel Conditions
Authors: Xie Yang , Xu Cang Su
Published: February 2014

Cavitation is a complicated multiphase phenomenon which leads to turbulence in fluid flows. The presence of cavitation and turbulence in a diesel injector nozzle has an effect on the subsequent spray characteristics. However, the mechanism of the flow dynamics is unclear because of the complexities of the nozzle flow. Meanwhile, there is few data exist about injector-body temperatures representative of diesel engine operation which can lead to phase change due to fuel flash boiling upon injection. Therefore, it is important to study the effect on internal nozzle flow characteristic. This paper mainly analyzed results of temperature and pressure conditions on internal nozzle flow characteristic. Diesel was simulated at 300,340,360,380,390K temperature for inlet pressure of 0.2 and 0.3MPa while the back pressure is 0.1MPa. Mass flue rate and the average velocity were also performed, and the Weber and Ohnesorge number were considered in the analysis.
Inverse Analysis of Regional In Situ Stress Prediction Based on Multi-Points Measurement and BP Neural Network
Authors: Liu Wei Qun , Song Ting , Li Yu Shou , Zheng Shu Fei , Yang Jing
Published: February 2014

Based on the measurement of in-situ stress and engineering-geological conditions, we built computing models with pre-exerting boundary loads and simulated the regional stress field involved. Boundary loads can be approximately determined by use of the multiple linear regressions, and be further optimized with the artificial neural network. By calculation, the corresponding initial in-situ stress field can reach ideal accuracy. As an example, we inversely analyzed an engineering problem in Chinese Wo-bei mine. The results shows that the simulation can meet the point measurement very well, and the regional-stress estimation may play an important role in engineering.
A Real-Time Fault Prewarning Approach to Generator Sets Based on Dynamic Threshold
Authors: Xie Guo Cai , Fu Yi Ding , Li Zhao Hui
Published: February 2014

Fault prewarning is important to guarantee the safe and stable operation of Generator Sets (GS). In order to generate prewarnings quickly and accurately before the failures or faults occur in GS, a real-time fault prewarning approach to GS based on dynamic threshold was put forward. This approach was consisted of five steps, that is operating condition (or abnormal event) synchronous, dynamic threshold selection, threshold analysis, fault detection and fault prewarning. The dynamic threshold (closely related to operating condition or abnormal event of GS) was the key of this approach, which can be obtained by means of expertise knowledge discovery. This approach can effectively reduce false positives and false negatives for the faults of GS, whose effectiveness is validated by the applications and practices of Gezhouba power plant.
Optimization of Goods Locations Assignment of Automated Warehouse on Hierarchic Genetic Algorithm
Authors: Wang Xue Lian , Xu Man , Xiao Jing , Guo Ran
Published: February 2014

The paper presented a goods locations assignment optimization problem of automated warehouse. A hierarchic genetic algorithm (HGA) was designed to solve this problem. The principium of the algorithm was introduced and a representative result and the analysis were given. The experiment and the analysis indicate the validity of the HGA to optimization problem in above-mentioned conditions.
A Novel Semantic Ontology Modeling Method
Authors: Zhang Min Hui , Yang Jian
Published: February 2014

To solve the semantic representation in data integration system, a novel ontology modeling method was proposed. The relationship between deferent layers including the core ontology layer, the role ontology layer, the goal ontology layer, service ontology layer and the mediator ontology layer in the ontology framework was analyzed, and the implement specification of each layer was given based on UML specification. Experimental result shows that proposed method can improve the degree of accuracy of semantic representation, and has the advantage of good adaptability for structure instability and difference in user needs in the grid computing.
A Study of Shopping System Model Based on Agent in EC
Authors: Li Hong Gang
Published: February 2014

Typically, online transactions require a significant level of human intervention. Customers undertake the search for products, services, potential vendors and business partners. They evaluate alternatives, decide what goods to buy and when, from which vendor, and how much they are willing to pay for. They engage in potential negotiations, carry out the transactions and so on. As those markets become mature, new products and services, as well as new practices, are beginning to appear. There is already ample evidence that agent-based technology will be crucial for these developments, reflecting that both buyers and sellers being vigorously seek techniques to improve their performance. This work surveys several of these agents that help electronic commerce systems by describing their roles in the context of a Consumer Buying Behavior (CBB) model.
Study on the Relationship between the Depth of Coal Seam and the Quantity of CH4 Produced
Authors: Sun Xian Long , Gao Er Xin , Di Yan Tao , Xu Shan Shan
Published: February 2014

Based on the geological and the experimental data of the 13#coal seam of Sun-Cun Coal Mine, the relationship curve between the depth of coal seam and the amount of CH4 produced has been fit out. According this and the laboratory experiments, the relational expression between the quantity of CH4 and the period of spontaneous combustion has been obtained. The research results show that the relationship curve between the period of spontaneous combustion in coal sample and the quantity of CH4 fit exponential expression. Especially when the quantity of CH4 produced exceeds 5 mol / (Kg min), the period of spontaneous combustion in this experiment is almost unchanged. This law should be paid more attention to.
The Influence and Application of Textile Texture Features to Interior Soft Decoration
Authors: Liu Xiao Dong , Yang Bo Han , Huang Geng
Published: February 2014

Textile, as a kind of universal significant material in the human history, becomes an increasing number of popular among the people. Besides, it has the double needs in the material in the interior decoration. With the rapid development of our domestic economy, people, in China, put forward to more higher standard for the demands of their indoor living, The soft decoration dominated by interior textiles has become the mainstream and main development trend of design field in our society. This article intends to analyze from the level of the texture feature, and from the four aspects to analyze the influence of textile texture in the indoor decoration: textile texture, the color of textile, pattern and cultural of textile, and the emotional of textile, meanwhile, around the texture features of the textile and extend the wide inspiration and thinking to the interior adornment.
First Principles Study on Structural and Electronic Properties of LiFeSO4OH Cathode Material for Lithium Ion Batteries
Authors: Badrudin F.W. , Rasiman M.S.A. , Taib M.F.M. , Hussin N.H. , Hassan O.H. , Yahya M.Z.A.
Published: February 2014

Structural and electronic properties of a new fluorine-free cathode material of polyanionichydroxysulfates, LiFeSO4OH withcaminitestructure are studied using first principles density functional theory. From the calculated result, it reveals that antiferromagnetic configuration is more stable compared to ferromagnetic and non-magnetic configuration. Meanwhile, the density of state calculation divulges that this material exhibited large d-d type of band gap and would behave as a Mott-Hubbard insulator. Thus, this behaviour can lead to poor electronic conductivity.
Status and Trends of Low Carbon Activities of Construction Materials in Korea
Authors: Choi Ji Hye , Lee Yoon Sun , Jang Hyun Suk , Lee Jeong Seok , Kim Jae Jun
Published: February 2014

A building is a structure constructed using various methods. An enormous amount of resources and energy is invested in the construction of buildings. In order to reduce the energy spent and the environmental load incurred by the construction of buildings, it is necessary to first reduce the energy spent in and the environmental load of each material involved in the construction of buildings. To achieve low carbon greenhouse gas emissions and energy goals, locally as well as internationally, both public and private sectors have focused on improving the environmental impact of products. This paper discusses the low carbon activities of the construction material industry. Here, we investigate the trend of each country in policy support and technological innovation for realizing low carbon activities. We also analyze the carbon dioxide emissions of certified carbon labeled construction materials. Because the process of producing construction materials makes it difficult to reduce the generation of carbon, only 68 items of a total of 962 items were certified as carbon labeled materials. However, leading material manufacturers are ready to recognize certified carbon labeling as an important process in order to gain the customer's trust and play a leading role.
Establishment of Structural and Elastic Properties of Titanate Compounds Based on Pb, Sn and Ge by First-Principles Calculation
Authors: Hussin N.H. , Taib M.F.M. , Johari N.A. , Badrudin F.W. , Hassan O.H. , Yahya M.Z.A.
Published: February 2014

Structural, electronic, and optical properties of PbTiO3, SnTiO3, and GeTiO3 tetragonals (P4mm, 99 space group) were investigated using density functional theory as implemented in pseudo-potential plane wave in CASTEP computer code. The calculated equilibrium lattice parameter, electronic band structure, and optical properties for PbTiO3 (reference compound) are in good agreement with the available experiment data. The result also shows that GeTiO3 has a higher tetragonality (c/a=1.18) compared with SnTiO3 (c/a=1.15) and PbTiO3 (c/a=1.05). Calculations of the elastic constants of PbTiO3, SnTiO3, and GeTiO3 tetragonals show that they are mechanically stable. The electronic band structure shows that PbTiO3 has higher indirect band gap at X-G compared with SnTiO3 and GeTiO3, as explained in detail by the optical properties of ATiO3 (A=Pb, Sn, Ge) through the refractive index and absorption coefficient.
Based on PLC Control of Double Constant Pressure No Tower Water Supply System Design
Authors: Wang Lie Zhun
Published: February 2014

In view of the traditional double motor constant pressure water supply system without tower in the operation process of the problem of short service life, the design of a new type of dual voltage no tower water supply control system. The control system uses PLC, soft starter and frequency converter technology, the soft starter can make the motor to realize soft start and soft stop, no impact on the motor, can extend the service life of the motor, avoid pumping station "door" damage, reduce repair costs and repair work. The running results show that, after the reformation of water supply system can save more than 21% energy, but also improve the quality and reliability of the water supply.
A New Approach for Autonomous Robot Obstacle Avoidance Using PSD Infrared Sensor Combined with Digital Compass
Authors: Xue Yang , Yang Jun Tao , Dong Ya Ling , Shen Jia Li , Peng Ru , Huang Ri Bo , Ding Jie
Published: February 2014

This paper presents a new approach for obstacle avoidance of small mobile robots, which combine the position sensitive detector (PSD) with digital compass. It is important for an autonomous robot to explore its surroundings in performing the task of localization and navigation for searching. Because of the complexity of the environment, one simple kind of sensors is not sufficient for robot to accomplish these tasks. In this paper, the small mobile robots are enabled to identify barriers and distinguish surroundings by using the angle signal from the digital compass which is generally mounted on the robot. Experimental results indicate that this approach based on digital compass shows great potential in autonomous robot obstacle avoidance.
Nonlinear Adaptive Tracking of the Steward Platform in Task Space
Authors: Chen Yi Mei
Published: February 2014

This paper presents an adaptive nonlinear controller equipped with a friction estimator for a 6 degree of freedom (DOF) parallel manipulator-steward platform. With the aid of direct adaptive technique and control Lyapunov function method, an adaptive controller is designed to complete the globally adaptive stability of the closed-loop system. The stabilized conditions and corresponding proof are also presented, and the selection method of the controller parameters is proposed. Simulation results are demonstrated in support of the proposed control scheme.
Study on Safety & Protection Ability of GNSS Receiver from the View of Main Materiel System
Authors: Zhang Wang Xun , Hou Hong Tao
Published: February 2014

The global navigation satellite systems (GNSS) is used more and more widely in military and civilian, but because of low sending power of GNSS signal, and other weakness, the safety and protection related issues have attracted wide attentions. However, most literatures about this were just qualitative enumeration or only focused on the navigation performance itself. This work studied this question from the view of the main materiel system that GNSS served for. We analyzed the impacts of GNSS receiver’s safety & protection ability on the operational utility of main materiel system based on a mathematical model. First of all, a mathematical function which contains several protection related parameters was used to describe the issues, followed with detail quantitative methods for those parameters. Then a case study was shown to demonstrate the application of the model proposed before. Based on the case study, it appears that the method has great potential and applicability to safety & protection ability analysis of GNSS.
Control Strategy Design and Validation for EV Based on Rapid Prototyping Platform
Authors: Du Chang Qing , Liu Yong Shan , Yan Fu Wu , Du Gang
Published: February 2014

To address the control strategy optimization issue of Electric Vehicles (EV), this paper designed distributed control system based on CAN network for EV, constructed a real time EV control model by Simulink and Stateflow. The model was converted to C code After simulating of the model had been conducted on PC, then the C code was downloaded to the rapid prototyping platform ControlBase_VT, and a model based prototyping controller for EV was developed. The prototype controller was mounted to a car, and vehicle control strategy is tested, analyzed and optimized. Using rich hardware resources of rapid prototyping platform and the conversion function from simulink model to executable C code, rapid development and optimization of control strategies is easy to be achieved, simple method is provided for the development, validation and optimization of control strategy, and development period and cost is reduced compared to self-built based hardware development.
Constant Pressure Water Supply System Based on Fuzzy Control Technology
Authors: Wang Yi , Huo Da Yong
Published: February 2014

This paper explains and demonstrates how to construct a constant pressure water supply system with an integrated intelligent inverter controller (CPS-20B type) based on fuzzy control. This system can automatically adjust the mode of operation in accordance with different working conditons. The controller can choose the number of working pumps and change the motor speed to achieve constant pressure water supply. The PID regulator is set in the CPS-20B1 controller to adjust the output of the inverter, and the automatic regulating system is formed into a closed loop. The simulation results and practical application show that this system used in the water supply network can keep the water pressure stable. This system has been used in a number of industrial and civil water supply service since 2009, which improved efficiency and saved cost.
Design of the Metal-Welder Ultrasonic Transducer by Using Finite Element Analysis
Authors: Yu Wen Jie , Yu Tao , Park Sung Jun
Published: February 2014

In this paper the optimized design of ultrasonic metal welding transducer has been done by using the finite element analysis method and the Screwing torque test. The converter part, boost part and horn part are all taken into account here. The p-wave propagation on the face and s-wave on the flange are approved primely. With the binding force changes, the mechanical Q value of transducer changes also followed. Therefore the amplitude of the output energy will be affected. Through the experiment the optimal design of the Screwing torque output were achieved. Metal Ultrasonic welding has its own special requirements. And the mechanical vibration frequency of the transducer is set as 20 kHz here. At last phase and frequency characteristics of the transducer were measured with Impedance Analyzer Test.
Evaluation Method of Voltage Stability Based on Minimum Singular Value
Authors: Liu Bing , Wang Ying , Yang Zhen , Li Yun Wei , Xie Hua Zhi , Zhang Yan , Zhang Wen Chao , Deng Xiang Yang , He Cheng Ming
Published: February 2014

When the system reaches the static voltage stability limit point, Jacobian matrix is singular. By checking if minimum singular value is zero, its very easy to determine whether or not Jacobian matrix is singular. So the minimum singular value of Jacobian matrix can reflects the degree of system voltage stability effectively. Firstly this paper introduces singular value decomposition, analyses load characteristic and excitation limits involved in this method and examples on PSD-FDS are demonstrated. At last, suggestion on voltage stability monitoring by minimum singular value is proposed.
The Assessment of Transformer Status Based on Gray Theory
Authors: Chang Jing , Huang Jia Dong , Song Peng , Han Ting Jian
Published: February 2014

According to the transformer status assessment results, the corresponding maintenance strategy can reduce maintenance costs, improve reliability of the transformer and extend service deadline and service life of the transformer. Since transformers can be seen as a typical gray system, the method of gray clustering decision is proposed to assess transformer status. This article established the whitening weight function, analyzed the status information which is involved in transformer status assessment and gave the steps of gray clustering decision.
Efficient Pattern Matching Algorithm for Intrusion Detection Systems
Authors: Yang Wen Jun
Published: February 2014

To overcome the defects of low efficiency of pattern matching in intrusion detection systems (IDS), an efficient pattern matching algorithm is proposed. The proposed algorithm first preprocesses pattern to record pattern information, then it recursive compares the nodes to find the most common part of pattern to improve efficiency. The proposed algorithm also appends auxiliary structure of m nodes in pattern to reduce time and space complexity. Theoretical analysis shows that for the subject with n nodes, the time complexity of the proposed algorithm is, and space complexity is . Detailed experimental results and comparisons with existed algorithms show that the proposed algorithm outperforms current state-of-the-art algorithms in terms of time efficiency, space efficiency and matching ratio.
Determination of Uranium in Ore with Volumetry of H2SO4-TICL3-NH4VO3
Authors: Yang Jin Hui , Dai Shi Liang , Pan Xiao Kang , Liu Li , Zhou Shu Kui , Wang Jin Song
Published: February 2014

The uranium ore sample is dissolve with H2SO4, HF and H2O2.Uranium (VI) is reduced to uranium (IV) by titanous. The excess titanous is oxidized with sodium nitrite and excess sodium nitrite is destroyed with urea. Uranium can be determined by ammonium vanadate volumetry in the medium of 6 mol/L sulfuric acid taking o-phenanthroline ferrous sulfate as indicators. The determination limit is 0.03%, the RSD is better than 3%, the recovery is 95~105%. The error is less than 2% compared with the standard sample of uranium ore.
A Survey on QoS-Aware Secure Data Transmission in Multimedia Sensor Networks
Authors: Ye Qian , Wu Meng , Wang Yu Fei
Published: February 2014

QoS assurance and information security are important for multimedia data transmission in wireless multimedia sensor networks. First, the status of multimedia sensor networks was introduced. Then research status of QoS assurance and information security of wireless multimedia sensor networks was surveyed, and the related open issues were also analyzed. Finally, the technology routes to solve the open issues were also studied and discussed. We argue that trusted QoS architecture considering various applications with different QoS requirements is important for wireless multimedia sensor networks. And network conditions and protocol layers must be well designed in QoS-aware secure multimedia routing mechanism to satisfy QoS requirements of multiple traffic classes. Technologies of information hiding, multimedia data resolution, and multi-routing can be used for privacy protection in wireless multimedia sensor networks.
Research on Data Security of Mobile Payment App
Authors: Shan Mei Jing
Published: February 2014

This paper studies Mobile Payment App from Mobile payment and Application. We analyze the data security risks hidden in this payment model. Give the corresponding solutions. Finally, look forward the research direction of Mobile Payment App security.
Substation Equipment Temperature Monitoring System Based on Heterogeneous Wireless Sensor Network
Authors: Yang Jing , Xiu Yang , Shi Yan Ting , Zhao Long Tao , Tan Xiao Yan
Published: February 2014

According to the records that the too-high temperature rise of equipment leaded to accidents easily, the temperature monitoring system based on ZigBee and GPRS, RS232 technology is designed. The perception layer uses the heterogeneous network topology by adding appropriate heterogeneous nodes to ordinary ones, which are much better than the ordinary in computing power, storage capacity, etc, and this topology structure extends transmission distance. Both of them use CC2530 chips, and the heterogeneous nodes are not only responsible for collecting temperature data, but also responsible for forwarding data from ordinary nodes. The sink nodes send alarm messages to staff by GPRS, and forward data from heterogeneous nodes to a PC via RS232. The system uses Visual Studio for software design to realize the function of data processing, display and storage, in order to achieve real-time monitoring of substation equipment and early warning.
Tamper Detection in RFID Tags Using Zero-Watermarks
Authors: Yao Xiao Ming , Chen Hong Yu , Li Hong Lei , Zhou Xiao Yi
Published: February 2014

Recently data integrity issues of applications based on radio frequency identification (RFID) have drawn great concerns worldwide and many watermarking-based schemes have been proposed. While those schemes can effectively verify if the protected tag data be modified, they also expose both the protected data and the watermark to any adversaries. In this paper, we present a zero-watermark scheme, which stores the watermark not in part of the data fields of RFID tags but in the back-end database system or that of a trusted third party without any modification of the original RFID data. The novelty of this zero-watermark scheme lies in the fact that we extend the zero-watermark technology to the RFID tags and the use of data tampering from the limited applications of copyright protection of digital works. We term this scheme ZMark-TamDetect because it is a tamper detection solution using zero-watermarks, which is so designed that it can be easily plugged into existing RFID middleware applications. This proposal is one of the first works that integrates zero-watermark and RFID technologies together and it provides a detailed theoretical foundation for the ZMark-TamDetect.
The Calibration Techniques of Paper Basis Weight Sensor
Authors: Hu Lian Hua , Li Xin Ping , Tang Wei
Published: February 2014

This paper deals with the study of factors which are affecting basis weight sensor measuring accuracy, the Z distance, XY dislocation, air gap temperature, dust and paper grades. The calibration techniques and solving methods of accurately measuring are given. Automatic calibration and range division are combined to improve the accuracy of basis weight sensor, and the BW measuring precision is reasonable. Static accuracy (2σ) is 0.20% and dynamic accuracy (2σ) is 0.25% at the range of 10 g/m2-1500 g/m2.
Design of Landslide Monitoring and Early Warning System Based on Internet of Things
Authors: Li Jian , Li Chuan Kun , Li Kun , Liu Ying
Published: February 2014

This paper designed a kind of efficient IOT transmission platform based on wireless sensor network and GPRS network. Using the multi-mode sensor nodes composed of temperature-humidity senor and acceleration sensor, realize the effective detection of geological disaster, such as landslide and debris flow. After experimental verification, the IOT platform based on the two levels of network structures, can effectively transmit the monitoring point's information, such as the surface humidity, tilt angle and displacement. The system has long transmission distance and low power consumption.The system will have certain engineering value in the field of geological monitoring.
Numerical Analysis of the Effects Caused by Ground Reflection on Aperture Coupling
Authors: Wu Hong Lin , Yin Hao , Shen Wei Dong , Meng Hai Jun , Tan Xue Chao
Published: February 2014

In order to analyze the influence of the near-ground reflection on aperture coupling, a full-scale model of metal shelter with a lossy ground was constructed. The rules of aperture coupling of the High-altitude Electromagnetic Pulse were researched, while the angle of incidence, the conductance and relative permittivity of the ground were changed respectively. Then the strength of electric field inside the shelter was computed and compared when the shelter was above on different topography. Studies show that the coupling electromagnetic energy strengthen with the incident angle of plane wave increasing. When the conductance and relative permittivity of the ground gain, the main crest of the electric field substantially keeps constant, while the second crest increases dramatically. Sea surface has the strongest reflection of electromagnetic pulse, followed by sand land, then the mud land. The reflection of wet land is much stronger than dry land.
Rules of Harmonic Longitudinal Propagation in Various Voltage Classes
Authors: Dai Zhi Qiang , Du Xiao , Lian Huan , Wei Si Ming , Liu Huan , Zhang Yi Gong
Published: February 2014

Different voltage-class buses of transformer substations which are established based on harmonic voltage distortion to limit amplitude via national standards, so study of harmonic longitudinal propagation (RHLP) is essential to power networks. In order to research RHLP, building models of different electrical components which are harmonic sources, equivalent generators, distribution parameter overhead lines (DPOL), transformers, and loads and so on are crucial. This paper proposes a method which utilizes the principle of electric circuits' ohm' law, series resonance and parallel resonance to study RHLP. Finally, according to Henan province power networks frame, a model is constructed in the simulation software packages PSCAD/EMTDC to verify the method. Furthermore, using MATLAB calculation and PSCAD/EMTDC simulation conclude RHLP in different voltage classes.
Weight Size Determined Variable Step Size LMS Method for Identifying under Damped Systems
Authors: Abbas Hussain , Hai Huang
Published: February 2014

This paper presents a novel improvement to the LMS method which seeks to set different step sizes to different weights depending on their relative sizes. Sample numerical simulations carried out to identify different plant configurations shows that the proposed method provides an early convergence and thus identifies the plant earlier.
Weak Signal Detection and Application in Electronic Experiment Based on Virtual Instrument
Authors: Tian Tian , Li Zhen Yu , Gao Tian , Liu Fang Yao , Wu Jian
Published: February 2014

Base on the virtual instrument technology, a micro signal measurement system was established and applied to the electronic teaching experiment. It is composed of PC, oscilloscope, signal generator, ac constant current source, low noise preamplifier and tested operational amplifier, etc. it can complete the measurement of uV weak voltage, uA weak current measure, wires and printing plate conductor resistance and inductance, amplifier open-loop amplitude frequency and phase frequency characteristics, and so on many aspects of modern electronic measurement experiment content. The system not only has the characteristics of functional diversity, measurement accuracy, and good graphic interface, simple operation and overcomes the shortcomings in the course of electronic technology experiment teaching, and play an important role on improving the experimental conditions,reducing the cost of experiments, raising the level of classroom teaching and practice of teaching.
Research of Film Thickness Online Measurement System
Authors: He Ping , Zhang Hong Jian , Liu Chao , Cao Sheng Mei
Published: February 2014

Aiming at the problem of traditional thickness measurement methods, the paper proposes a design and realization scheme of non-contact high-precision online thickness gauge. Double sensors are used to realize the differential measurement which can effectively reduce errors caused by the vibration of the tested object. TMS320F2812 is chosen as the main control chip to realize data collection, equipment control and signal processing. Finally algorithms of signal filtering and curve fitting are designed to improve the precision. Practical application shows that the system has easy operation, high resolution, stability and reliability.
Application of Barcode Information and Acquisition System for the Machining Process Technology
Authors: Wu Nan , Zhang Qing , Pian Cheng Rong
Published: February 2014

Workshop information collection is the indispensable link in enterprise production. In view of the low efficiency, high error rate characteristics existed in traditional workshop information collection. This paper puts forward the idea of applying barcode to the production management, including products, materials, personnel and equipment. This method can realize the whole management of workshop condition, reduce the cost of enterprise production and enhance the competitiveness of enterprise. The above research has been applied in the machining process, which proves that to use barcode in the workshop management is feasible. The real underlying data is provided as reliable data support to make the workshop production platform.
Dynamic Displacement Response Characteristics of a Solenoid Actuator for Electromagnetic Separation
Authors: Lu Jian Bo , Li Yong , Xi Jun Bin , Liu Hong Liang
Published: February 2014

According to the structure of a solenoid actuator, transient field mathematic model of two-dimension is established. Based on model, relationship between transient current of the coil and the motion of the armature is analyzed. Compared to experimental results, simulated results are proved, which are able to provide theory basis for displacement detection of electromagnet valve and fault diagnosis of valve and system by inner parameters of solenoid actuator. The results show that the rising current characteristic has the change process of increase-decrease-increase, and separating motion time of the solenoid actuator could be estimated to be 20 ms (18 v). The solenoid actuator is pulled back approximately in 8 ms under the action of the spring.
Monitoring System for Plant Growth Environment Based on Zigbee/RS485
Authors: Xiao Qian Hu , Weng Shao Jie , Zhang Wen Qing
Published: February 2014

After studying the research status of monitoring system for plant growth information, a system is developed with Kingview, VB and C to monitor soil temperature, soil moisture, air temperature, air humidity, Illumination and carbon dioxide. The system realizes real time monitoring, remote access, trend analysis and many other functions. Transmission distance is estimated by channel transmission loss model. Theoretical transmission distances are 1691.99m outdoor and 480.84m indoor. The real transmission distance is measured in the production base. The experimental communication distances are 1680m and 1520m in sunny and rainy day.
Feature Extraction of the Small Leakage Diagnosis of Oil Pipeline Based on Acoustic Signal
Authors: Zhao Jiang , Shang Meng , Tian Jing
Published: February 2014

This paper introduces the related theory of sound waves , we collect the data through the acoustic wave sensors of the pipeline fault diagnosis system platform, decompose the signals to five layers by Mallat algorithm and wavelet function db4, compare the normal waves and leakage acoustic signal spectrum, and then get the power spectrum estimation for the decomposed signal at each level, we can see the signals energy feature in different frequency band. Feature extraction method based on wavelet transform can make the category of signal characteristics fully displayed in the different resolution band, it has a good application prospect in the field of acoustic signal processing.
Study on Corrosion Behavior of A3 Carbon Steel in the Manicipal Sludge
Authors: Long Xin Feng , Liu Yi , Lou Bo
Published: February 2014

Taking the corrosion depth as the evaluation index, the influence law of different factors such as pH and moisture content of sludge, corrosion temperate on metal corrosion behavior was studied by single factor experiment. The corrosion product was characterized by SEM and EDX at last. The results show that the corrosion depth of A3 carbon steel increases with the increase of temperature, moisture content and acidity of sludge. The corrosion product of A3 carbon steel is mainly brown loose substance, the corrosion extent of carbon steel is deep and many elements are soaked into carbon steel. Metal corrosion results from different temperatures and different pH of sludge is non-uniform, while metal corrosion results from different moisture content of sludge is uniform.
Facial Expression Recognition Algorithm Based on Gabor Texture Features and Adaboost Feature Selection via Sparse Representation
Authors: Wang Qing Wei , Ying Zi Lu
Published: February 2014

This paper proposed a new facial expression recognition algorithm based on gabor texture features and Adaboost feature selection via SRC(sparse representation classification). Five scales and eight orientations of Gabor wavelet filters were used in this paper to extract gabor features. For an image of size , the number of gabor features is 163840, In order to extract the most effective features for FER(facial expression recognition), Adaboost algorithm is used for feature selection. This paper divided 7 facial expressions into two categories, where the neutral expression as the first class and the remaining six expressions as the second class. In each size and orientation 110 features are selected. At last 4400 features are selected combined SRC algorithm for FER. Test experiments were performed on Japanese female JAFFE facial expression database. Compared with the traditional expression recognition algorithms such as 2DPCA+SVM, LDA+SVM, the new algorithm achieved a better recognition rate, which shows the effectiveness of the proposed new algorithm.
Outdoor Navigating Scene Labeling Using Importance Factor Based I-RELIEF and Feature Weighted Support Vector Machines
Authors: Tu Jun , Liu Cheng Liang , Miao Zhong Hua
Published: February 2014

Feature selection plays an important role in terrain classification for outdoor robot navigation. For terrain classification, the image data usually have a large number of feature dimensions. The better selection of features usually results in higher labeling accuracy. In this work, a novel approach for terrain perception using Importance Factor based I-Relief algorithm and Feature Weighted Support Vector Machines (IFIR-FWSVM) is put forward. Firstly, the weight of each feature for classification is computed by using Importance Factor based I-Relief algorithm (IFIR) and the irrelevant features are eliminated. Then the weighted features are used to compute the kernel functions of SVM and trained the classifier. Finally, the trained SVM is employed to predict the terrain label in the far-field regions. Experimental results based on DARPA datasets show that the proposed method IFIR-FWSVM is superior over traditional SVM.
The Image Information Recognition of Large Structures Based on CAD Model Characteristics
Authors: Zhang Yu Kun , Zhang Qing , Zhao Lei
Published: February 2014

Because of the interference of the noise signals, the actual feature of objects cant be reflected clearly by photo which is measured by optical measurement. Thus, the database of feature of geometric model is established at the platform of Pro/E. Then the information selected will be extracted and exported, and compared to the photo which is gotten from the optical instrument. This can identify the information to prove the correctness when detecting objects photographed, which is used to adjust to the large structure.
The Change and Management for Surveying Achievement of Real Estate Using GIS Technology
Authors: Yang Guang , Bi Xiao Shuo
Published: February 2014

The surveying achievement is the basis for managing the urban real estate, the currency and accuracy of which are the two preconditions to increase efficiency for management of real estate. Based on the validity of surveying data in urban real estate, this paper is to explore the overall method and mechanism for the change of surveying achievements. With the practical experience, operable measures could be proposed for increasing the management ability of urban real estate in China.
Intelligent Video Surveillance System Based on Sound Source Localization Technology
Authors: Zhang Ya , Zhao Cang Rong , Guo Lai Gong
Published: February 2014

Since most of the current video surveillance systems are static or dynamic track based on video detection, the paper puts forward the scheme of sound source localization and camera dynamic acquisition in the intelligent video surveillance system. The microphone array is used to locate the sound source, then the camera is steered to monitor sound source position and alarm is executed by image analysis. The experimental results show that the system can achieve effective positioning of the sound source and alarm at abnormal condition under a low-niose environment.
A Novel Approach of Edge Detection Based on Vector Morphology
Authors: Chen Qiang
Published: February 2014

Edge detection of color image is a difficult problem in image processing. Although a lot of corresponding to methods have been proposed, however, none of them can effectively detect image edges while suppressing noises. In this paper, a novel edge detection algorithm of color images based on mathematical morphology is proposed. Through designing a new anti-noise morphological gradient operators, we can obtain better edge detection results. The proposed gradient operators are applied to detect edge for three components of a color image. An then, the final edge can be obtained by fusing the three edge results. Experimental results show that the feasibility and effectiveness of the proposed algorithm. Moreover, the proposed algorithm has better effect of preserving the edge details and better robustness to noises than traditional methods.
Modeling of Electrostatic Chuck and Simulation of Electrostatic Force
Authors: Wang Xing Kuo , Cheng Jia , Wang Ke Sheng , Yang Yi Yong , Sun Yu Chun , Cao Ming Lu , Han Chuan Kun , Ji Lin Hong
Published: February 2014

Electrostatic chuck (ESC) is one of the key components in IC manufacturing process, which applies the principle of electrostatic adsorption to clamp the wafer on its surface. In such a system, electrostatic force is considered as one of the most important indicators. The method of modeling and simulation of electrostatic force by COMSOL software is proposed, and the accurateness is validated by comparing the results with those from reference. Then, the simulation of ESC in real manufacturing process is finished using the above method, which focuses on the effects of dielectric materials and voltage on electrostatic force. The research can offer references for the design of ESC, and it has significance to reduce experimental cost and improve the reliability of the equipment.