bluuebunny/crossref_metadata_2025 huggingface dataset:
Acquirement of Melon Morphologies through High-Precision and Non-Destructive Vision Measurement
Authors: Lv Fu Xiang , Miao Yu Bin , Zhu Qiang
Published: January 2012

For the purpose of measuring the micro changes of morphological parameters of melon organ, this paper put forth a new algorithm based on mathematical morphology and spline interpolation to obtain the phenotype information of melon such as area and horizontal and vertical diameter and developed a high-resolution non-destructive and contactless measuring system based on vision processing to get the projection area of melon and its diameter. The algorithm is easy to carry out, and can get more ideal edge information than some traditional algorithms. It supplies theoretical basis for revealing the combined response relationship and temporal and spatial variation character between melon morphologies and key environmental factors.
Multifunction GPS/GPRS Automobile Security System
Authors: Wang Xiu Feng , Cui Gang
Published: January 2012

Based on ARM,multifuncttion GPS/GPRS automobile security system was designed,which focused on security and detectiong.The system combines with detection technology, sensor technology, GPS technology, GPRS technology and digital filtering technology.This system was discussed from software and hardware. Related math model was established. Corresponding test was been brought forward to improve system reliability. Average filtering method and median filtering algorithm have been used to inhibiting interference signals with variety of frequency in software. In this paper,the advantages of this system have been discussed.The embeded system realizes the function with characteristics of low cost, high performance, real-time and reliability ,it has high practical value.
Design of Remote Transmission System for Wireless Heat Metering
Authors: Wang Xiao , Ma Ru Jian , Zhang En Ping
Published: January 2012

A design scheme is proposed in this paper for heat metering remote transmission system based on the Xbee Pro module. Wireless network technology is used in the scheme. A dynamic monitoring, control and transmission network is composed by the wireless network system and the computer in the monitoring and control center. The real-time data detected from heat metering system can be transmitted and monitored. Xbee Pro module and MSP430FW427 single-chip micro-computer are used in the nodes or terminals of the system. The self-provided functions and modules of the components are taken into sufficient consideration in the design to make the system performance as superior as possible and the system structure as simple as possible. In this way, the transmission system with low power consumption and simple structure is achieved.
A New Imaging Logging Technology Based on Magnetoacoustic Tomography with Magnetic Induction
Authors: Xia Hui , Liu Guo Qiang , He Wen Jing
Published: January 2012

Imaging logging is a new technique which has been developing in recent years, its’ silo facilities could collect large information with high resolution, and the measurement result is usually presented in graphics after processed. This paper presents a new imaging logging technique based on magnetic-acoustic Tomography with Magnetic Induction(MAT-MI), introduces its’ logging principle, gives detailed experimental system, makes a simple copper coil experiment and verifies the feasibility of the technique. These studies will lay a foundation for practical application of new imaging logging technology.
The Testing and Verifying Method for a New Principle
Authors: Liu Bei Ying
Published: January 2012

A new measurement theory, it is not enough for the proof in math only, from the point of engineering view, it must be verified by practice. In this paper, the disadvantage of traditional method of indirect testing method is discussed and the concept of repeating and reappearing from the theory of accuracy was used in this new method to support to judge weather a new principle of measurement is advanced or not. On the same measuring condition, the test system 1 is compares with system 2, if the measuring error of system 1 is too small to measure by system 2, the accuracy of system 1 is not lower than system 2, vice versa.
Deep Space Navigation Using X-Ray Pulsars
Authors: Yang Bo , Liu Ling Ke
Published: January 2012

This paper presents a novel technology for determining spacecraft position and velocity using X-ray pulsars. There are numerous potential benefits from this technology. A X-ray pulsar-based navigation (XNAV) system would be available anywhere in the Solar System that cosmic X-ray sources can be observed. The relatively low disturbance environment of deep space, as compared with low-Earth orbit, allows pulse time of arrival (TOA) to be measured precisely. Furthermore, the system require only infrequent pulsar ephemeris updates and can operate in an autonomous mode, independent of Deep Space Network (DSN). XNAV becomes increasingly attractive for deep space missions.
Prediction of Reservoir Parameters Variation Based on Time-Lapse Seismic Survey
Authors: Fang Gang , Chen Xiao Hong , Li Jing Ye
Published: January 2012

Fluid saturation and pressure are two of most important reservoir parameters during oil and gas production scheme adjustment. A method to compute the change of fluid saturation and pressure with multi-parameters regression was presented based on time-lapse seismic inversion data. Rock physical models of unconsolidated sand rock reservoirs were determined according to the real field’s conditions to analyze how seismic attributes change with variation of reservoir parameters. The radial basis function artificial neural network which was trained by this model was used to predict saturation and effective pressure. The predicted results are of high consistency with reservoir numerical simulation, which provide valuable reference for reservoir dynamic monitoring.
Air Temperature Distribution Inside of a Longitudinal Highway Tunnel: A Case Study
Authors: Han Xing , Zhang Xu
Published: January 2012

With the development of tunneling technology and the increase of transportation, the mobiles are discharging more and more heat into the tunnel nowadays, which will cause the temperature enhancement. In this paper, general method of calculating the heat discharge is studied, and temperature distribution in the tunnels, which use different ventilation systems, is studied according to the one-dimensional steady state theory. One tunnel is taken for example to calculate the temperature distribution. The result can b e used in the relevant design and research.
Variation of Sauter Mean Diameter of Droplets of Gasoline Engine Intake Port during Cold Start
Authors: Ni Pei Yong , Wang Xiang Li
Published: January 2012

The reduction of sauter mean diameter (SMD) of droplets means the percent of the evaporated fuel, which is important to the formation of the combustible mixture in a port-injection gasoline engine during cold-start. Three-dimensional numerical simulation of SMD of the droplets in the inlet port of a gasoline engine was employed using the CFD software. This paper presented the effect of multi-parameters on SMD of the droplets including initial droplet velocity, intake temperature, fuel temperature, injection timing and engine speed. The simulation results show that the most influential parameters on SMD of the droplets are intake temperature and fuel temperature. The fuel evaporation rates increase approximately linearly with the intake air temperature and fuel temperature increasing. The initial droplet velocity and injection timing have a little effect on the fuel evaporation. As engine speed increases, SMD of the droplets firstly decreases and then increases. After intake-valve-open (IVO), back flow of gas in cylinders results in steep reduction of droplet diameter.
Minimum Entropy Deconvolution of Guided Wave Signals in Pipe Inspection
Authors: Wang Chang Feng , Geng Yan Feng
Published: January 2012

It is difficult to achieve high resolution for guided wave signals used in pipe inspection. The main reasons include overlap of the reflected waves, diversity of the guided wave’s mode and so on. This paper presents a minimum entropy deconvolution algorithm to solve the problem caused by low resolution of the measured signals. Some experiments were carried out to validate the algorithm. The experimental set-up consists of two pipes, one excitor and two accelerometers. The excitor was used to generate the guided wave signals. Two accelerometers were attached to the pipe end and pipe wall respectively，and were used to measure the guided wave signals. Results show that good estimate of the reflection coefficient is obtained and the resolution of measured signals has been improved. As a result, the length of two pipe samples has been calculated with a reasonable accuracy and the position of the defect in experimental pipe has also been acertained. All of these show a new efficient way for guided wave signal processing in pipe inspection.
Building Damage Detection Based on Single-Phase High-Resolution Remote Sensing Images
Authors: Zhang Hong
Published: January 2012

This paper presents a building detection approach based on HSV color space. The method is based on the gray level histogram features, which can separate the housing construction units from complex background. A building damage detection algorithm based on regional statistical information is also proposed in this paper, and a set of performance parameters of feature vector is studied to identify the extent of the housing collapse. The experiments on Haiti post-earthquake images from Google Earth and Yushu post-earthquake images from Internet are discussed in the paper. The experimental results show that proposed approach is effective and feasible.
Summarization on the Techniques of Testing Electronical System
Authors: Du Min Jie , Ai Jin Yan , Liu Li Min , Zhu Sai
Published: January 2012

With the fast development of electronic industry,the techniques of testing electronical system have varied from traditional functional test to structured test accordingly.The principel of functional test is presented in this paper and the representative techniques of structured test, as in-circuit test(ICT),boundary-scan test(BST),build-in self-test(BIST) and scan-path test,are explored subsequently.Finally,the developmenting trends in the future are looked forward to.
Research and Development of Wireless Network Temperature Measurement System
Authors: Zhou Yi Wu
Published: January 2012

This paper introduces the research and development of the temperature measurement system using wireless network based on ZigBee protocol. The system consists of network coordinator and a number of nodes. The structural and functional design for the nodes highlights the characteristics of industrial applications, and is of a certain reference value on research and development of industrial wireless sensor systems.
Agent Searching Edge Detection Algorithm for Bone Images
Authors: Zhang Hong Guang , Liu Yuan’ An , Tang Bi Hua , Jia Zhi Peng , Qin Yan
Published: January 2012

Bone image segmentation is the important technology for computer aided bone diagnosis system and the foundation for three-dimensional visualization of the human skeleton. Agent searching edge detection algorithm for bone images is proposed. Based on neighbor region correlation and regional harmonic mean feature vector correlation, different species of agent accomplish searching bone edge and experimental results are satisfactory. Experimental results comparison about the proposed algorithm, Prewitt, Sobel, Log and Canny is illustrated that demonstrates the proposed algorithm has advantages in some respects.
Time Delay Estimation Algorithm Used in Ultrasonic Wind Speed Measurement System
Authors: Xiong Xing Long , Xu Yue , Jiang Li Hui , Lei Yan Ping , Zhuang Zi Bo
Published: January 2012

In this work, the application of time delay estimation in ultrasonic wind speed measurement system is discussed. The algorithm of time delay estimation based on least mean square (LMS) adaptive noise cancellation of generalized correlation with fixed ultrasonic is presented. The algorithm uses LMS daptive filter to eliminate the noise interference efficiently and does not need to know prior-knowledge of signal and noise. Then, it uses generalized correlation to estimate the time delay. Computer simulation and practical test results show that the algorithm can effectively eliminate noise. The wind speed estimation accuracy is very high; so the algorithm can be used for monitoring the low-level wind field at airport regional.
Comparison of Processing Chains Based on Support Vector Machine Classifier for Hyperspectral Image Classification
Authors: Wu Jee Cheng , Lin Bo Kai , Tsuei Gwo Chyang
Published: January 2012

In this research, we compared the performance of different processing chains resulting from combinations of spatial denoising filters, unsupervised feature transformation methods, and a support vector machine classifier. Two different training and test sample scenarios were investigated and conducted on an AVIRIS image over the Indian Pines region in Indiana, USA. The results showed that by using the process chain (adaptive enhanced Lee filter, maximum noise fraction, and support vector machine) the classification accuracies of the kappa coefficient were better than those of the best previously published techniques.
A Fault Diagnosis Technique for Water-Steam Chemistry Process in Power Plant
Authors: Cao Shun An , Hu Jia Yuan , Huang Yan , Xie Jian Li
Published: January 2012

Carrying out the fault diagnosis of water-steam chemistry process in power plant has an important significance to ensuring high qualified rates of water and steam quality as well as maintaining safe operation of units. This paper proposed a fault diagnosis method based on improved credibility theory which is used to construct fuzzy diagnosis rules and data mining technique used to determine symptom weights and rule limens of reliability rules, and also improved the setting method of rule confidence. The adoption of data mining technique and new setting method of rule confidence can solve the problem that credibility reasoning results are influenced by person’s subjective factors, and make the reasoning process more scientific. Example results prove that this diagnosis model has a high accuracy, which indicates the significant practical value of the model.
Speaker Localization Based on Phase Detection of Vowel Fundamental Frequencies
Authors: Gao Jin Shan , Wang Shi Jie
Published: January 2012

Research on human-robot interaction has recently been getting an increasing amount of attention. In the research field of human-robot interaction, speech signal processing in particular is the source of much interest. In this paper, we present experiment of speaker localization using a microphone array and an ITD (Interaural Time Difference) method which finds the sound source by phase shift of two signals. Band pass filters are designed to get vowel fundamental frequencies. Phase sensitive detectors are applied to measure the phase differences of voice signal of different microphones. All circuits are constructed by FPAA (field programmable analog array). The proposed system can output speaker location in real-time with low power.
System of Measuring the Sub-Pixel Edge of Linear CCD Based on Multi-Scale Transform
Authors: Wang Yu Mei , Xu Guo Sheng
Published: January 2012

In order to improve the precision, speed, integration and reliability of the linear CCD system, a multi-scale compress derivation edge detection method of one-dimension image based on wavelet multi-scale transform is presented in this paper. The inspecting system of defects in based on CCD obtains signals of defects in with irradiation of parallel light by using linear array CCD control circuit. The defect signals were collected and transferred by using virtual oscillograph DSO-2902, and the defect signals were analyzed and processed by using computer. Based on it, Before the CCD signal entered the edge detecting system, it had been filtered by filter. Utilizing the characteristic that the grads of grey scale breaks at the edge of picture, the pixel edge of picture was detected by the algorithm which can be used to detect the edge of picture automatically. multi-scale transform used to detect the sub-pixel edge of picture. This method which is more accurate than former single threshold level comparison method can enhance edge and remove noise effectively.
Application of XML in the Remote Temperature Monitoring System
Authors: Cai Li Min
Published: January 2012

This paper Introduces XML (Extensible Markup Language), describes the Remote Temperature Monitoring System program. Samsung S3C2440 Microprocessor as the core of this system, Embedded Linux System and web server are transplanted, accomplish the on-site collection of temperature by the digital temperature sensor DS18B20, acquired data is saved in XML document, on-site real-time temperature can be displayed on a browser by a remote end. The results of actual runs show the effectiveness.
Multirate Output Feedback Based Optimal Filtering and Control for Discrete-Time LTI Systems
Authors: Janardhanan S.
Published: January 2012

The Kalman filter has been used very effectively in the past decades for estimation and control. However, it has been used with the input and output sampling rates being equal. This paper proposes a multirate output feedback version of the discrete-time optimal filter. A comparison of the performance of the conventional Kalman filter and the proposed filter has also been presented.
Credit Scoring Using Support Vector Machine: A Comparative Analysis
Authors: Harikrishna S. , Farquad M.A.H. , Shabana Shabana
Published: January 2012

Credit Scoring is the use of statistical/intelligent models to transform relevant data into numerical measures that guide the management and decision makers to make decisions such as accept/reject, pricing, pay/no pay and collections. This study focuses on predicting whether a credit applicant can be categorized as good or bad from the supplied data. Many researchers have recently worked on an ensemble of classifiers for such problems. It is observed from the literature that feature selection reduces the complexity of the system and improves the accuracy as well. Efficiency of SVM for feature selection and as a classifier in tandem and its application to credit scoring is analyzed in this paper. During the first step, SVM-RFE (Recursive Feature Elimination) is employed for feature selection and during the second step various architectures of SVM viz., Standard SVM, PSO-SVM and EVO-SVM are employed for classification purpose. The effectiveness of various approaches tested are evaluated using UK credit data and German credit data. It is observed that feature selection using SVM-RFE not only simplifies the process of credit scoring but also improves the accuracy of the system.
A Computationally Efficient Switching Based Lossless Compression Algorithm for Natural Images
Authors: Khanna Vineet , Choudhary Hari Singh , Trivedi Prakrati
Published: January 2012

This paper presents a new image lossless compression technique for natural images. The proposed algorithm uses the switching of existing Edge Directed Prediction algorithm and gradient Adaptive Predictor (GAP ) methods. The proposed algorithm is a switching based algorithm and the criteria of switching are based upon the adaptive threshold. We know that EDP has higher computational complexity due to the estimation of LS (Least Square ) based paramter whereas GAP has relatively lower computational complexity. So, in order to reduce the computational complexity we had made a hybrid combination of EDP and GAP Method which the proposed algorithm is a generic algorithm and it produces the best results in different varieties of images in terms of both compression ratio and computational complexity.
A Finite Element Analysis of the Normal Combination Round and Spline Broach Based on ANASYS
Authors: Zhang Guang Guo , Sheng Jing , Wang Feng
Published: January 2012

In the traditional design of round broach ,the impact tools of broach maybe unable to achieve the requirements for the processing precision,or even occur the situation of partial fracture due to a exaggerated partial deformation.In this article,by using Pro/E we complete the 3D solid modeling and the dimensional parameterization of the impact tools for combination round and spline broach,then import the 3D model into ANSYS,to analyze and solve the whole process of load and deformation at work.It can effectively improve the machining accuracy and the reliability of round broach, shorten the design cycle and reduce cost.
Studying on the Propagation Behavior of Bent Crack Bending from Slant Pre-Crack with Compressive Residual Stress
Authors: Ma You Li
Published: January 2012

For a slant pre-crack under mixed-mode conditions, a method is proposed in which mode Ⅰ and mode Ⅱ stress intensity factors ‹KI›mes and ‹KII›mes can be directly evaluated from the discontinuous displacement along it. The effect on fatigue pre-crack deformation behavior was discussed by comparing fatigue and annealed cracks. In general, using the biggest tangential stress criterion the direction propagating from the pre-cracks can be predicted by ‹KI›mes and ‹KII›mes calculated above. So testing for bending fatigue crack propagation under mixed-mode conditions was carried out using fatigue and annealed slant pre-cracks with slant angle β=450 defined as the angle between loading and pre-crack direction in a rectangular plate. As a result, for annealed pre-crack, the estimated fracture angle θestcorresponded to the measured oneθmes ; On the other hand, for fatigue pre-crack,θmes is bigger than θest because of the compressive residual stress around the pre-crack .
Detection for Rective Current Based on the Instantaneous Reactive Power Theory
Authors: Lei Xiao Cui , Zeng Guang , Zhang Jing Gang
Published: January 2012

Three-phase circuit instantaneous reactive power theory has received a successful application in detecting harmonic and reactive current timely, the ip-iq and d-q method of first proposed require the phase-locked loop and low-pass filter. The paper make corresponding improvement on the basis of the method based on amplitude integration which only can detect fundamental current , propose a method which can detect the active and reactive current, and the method based on amplitude integration can detect fundamental current of single-phase circuit directly, and simulation. The simulation results show that the method can detect the harmonic and reactive current accurately and timely, and is suitable for various circumstances that three-phase power supply distortion and asymmetry and so on, and when only detecting the harmonic current, it does not require the phase-locked loop and low-pass filter, while detecting the harmonic and reactive current, increases the phase-locked loop; when the method based on amplitude integration is directly used to detect single-phase fundamental current, the phase-locked loop and low-pass filter are not required. The paper deduces the theory of the method and researches on simulation analysis.
Determination of Maintenance Time Based on Maintenance Concept and Function
Authors: Yang Jun , Hao Jian Ping , Liu Hui
Published: January 2012

For the problem of determination of maintenance time in demonstration phase of materiel, analysis method based on maintenance concept and maintenance function is put forward. Maintenance concept gives the constraints for maintenance time By analysis of maintenance function, the relation between a function system of materiel and a maintenance level, and the relations of maintenance actions of levels are clarified. To describe determination of maintenance time for convenience, taking example for intermediate-level maintenance, on the basis of the given maintenance concept, models of maintenance time are built, and flow-processes of maintenance function are given. According to above analysis result, mean maintenance time of intermediate-level is determined. It provides an important basis for trading off the relation of impacting among maintenance concept, maintainability requirement, and design of materiel.
Radar Level Meter Measurement in the Storage Silo
Authors: Cheng Xiao Hong
Published: January 2012

Radar non-contact measurement technology, the microwave signal transmission does not need the media, feature-rich, with a wave of false learning function. It is not subject to any process in the steam, pressure, dust or temperature. And therefore suitable for high viscosity, corrosive, high temperature, high pressure, high dust and other occasions, the level measurement, level measurement methods routine at this time will not be achieved. Radar level meter in the high dust, slurry particles, pellets Level available non-contact continuous measurement of very good use of effects.
Dynamic Pricing and Ordering Policy for Non-Instantaneous Deteriorating Items
Authors: Maihami Reza , Abadi Isa Nakhai Kamal
Published: January 2012

In this paper, dynamic pricing and ordering policy for non-instantaneous deteriorating items is developed. Shortage is allowed and partially backlogged where as the backlogging rate is variable and dependent on the waiting time for the next replenishment. The major objective is to determine the optimal selling price and the optimal ordering policy simultaneously such that, the total profit is maximized. We first show that for any given selling price, optimal ordering policy schedule exists and unique. Then, we show that the total profit is a concave function of price. Next, we present a simple algorithm to find the optimal solution. Finally, we solve a numerical example to illustrate the solution procedure and the algorithm.
Statistical Tolerance Analysis Based on Constraint Satisfaction Problems and Monte Carlo Simulation
Authors: Jiang Yong Jun
Published: January 2012

This paper deals with the mathematical formulation of tolerance analysis. The mathematical formulation presented simulates the influences of geometrical deviations on the geometrical behavior of the mechanism, and integrates the quantifier notion. We propose a mathematical formulation of tolerance analysis which simulates the influences of geometrical deviations on the geometrical behavior of the mechanism, and integrates the quantifier notion. To compute this mathematical formulation, two approaches based on Quantified Constraint Satisfaction Problem solvers and Monte Carlo simulation are proposed and tested.
Longitudinal Flight Dynamics of Baseline-II BWB UAV
Authors: Nasir Rizal E.M. , Kuntjoro Wahyu , Wirachman Wisnoe , Ali Zurriati
Published: January 2012

The objective of this paper is to investigate longitudinal flight dynamics of the said aircraft at loitering flight condition near sea level. Three mathematical dynamic models are used to compute transient response of Baseline-II E-2 BWB along with a proposed model known as Model-N. Model-N is derived to incorporate as many important derivatives, including gravitational and pitch angle factor, as possible. While all these four dynamic models are different in a sense where one model is more simple or complex than the others, the basic architecture of all these models are the same. This paper shows the short-period mode needs serious attention. A control algorithm is needed to overcome its handicap which is below Level 3 damping ratio according to MIL-F-8785C. Improvement to phugoid can be considered secondary, but one must ensure that bringing short period mode to Level 1 flying quality does not make phugiod mode response worse than it is now.
Exergy Analysis of Micro Gas Turbine Tri- Generation System
Authors: Akramian K. , Moosavi M. , Etminan A.
Published: January 2012

This paper presents exergy analysis of Micro Gas Turbine (MGT) system. It is proposed to use hot MGT exhaust gases heat in a heat recovery steam generator to produce steam. Absorption chillers can help to increase the performance of MGT tri generation plants. MGTs are fuelled with natural gas and their waste heat is used to drive absorption chillers and other thermal energy users. Based on a steady-state model of the processes, exergy flow rates are calculated for all components and a detailed exergy analysis is performed. The components with the highest proportion of irreversibility in these systems are identified and compared.
A Study of Lake Wetland Information Automatic Extraction Based on the Interpolation and Threshold Method
Authors: An Zhi Hong , Sun Yong Jun , Chen De Zhi , Qiu Yun Feng
Published: January 2012

Lake is one of the most type important wetland; remote sensing technology applied on wetland had become a research hotspot of wetlands. Automatic or semi-automatic extraction using computer wetland information extraction can improve the efficiency in the human, material, etc. From remote sensing images automatically extract wetland information is important for Wetland research and putting forward Utilization. In this paper, Yellow River source region for the test area, we use interpolation and threshold method automatically to extract lake information from ETM + images. Making use of both spectral and structural features of lake, this method acquired a good result.
The Method to Calculate the Degree of Freedom of Terminal Link about Serial Robot
Authors: Sun Shu Hua
Published: January 2012

The terminal link of serial robot has six degrees of freedom at most. This paper presents another method based on the screw theory and kinematics output matrix, which can conveniently calculate the degree of freedom of terminal link about serial robot, and meanwhile lay good foundation for researching the parallel robot.
Intelligent Monitoring of Flight Crew Situation Awareness
Authors: Thatcher Steve , Kilingaru Kavyaganga
Published: January 2012

When a flight crew has situation awareness they have a complete and accurate understanding of the physical, temporal and emotional environments in which they are situated. This allows the flight crew to interpret and evaluate elements or events in the environment in which they are situated and determine the risks associated with these events and an appropriate strategy to minimize and manage these risks. This paper describes the architecture for an intelligent software agent which assesses a flight crew’s situation awareness through the observation of a pilot’s eye movements. The agent perceives pilot behavior using a proprietary eye tracking device. This behavior is compared to a behavior database to decide whether the behavior of the pilot is appropriate or inappropriate in terms of the safety of the flight. The flight crew is alerted if the behavior is judged to be consistent with the flight crew losing situation awareness.
Implementation of a Semi-Active Parking Assistance System
Authors: Kiyanfar Mohammad , Ghodsi Mojtaba , Akbarimajd Adel
Published: January 2012

This paper presents a novel approach to solve semi-active non-holonomic vehicle-parking assistant problem. This system can be automatically drive a vehicle and can be used during day or and night. A robust algorithm for this system is developed and embedded controller hardware is designed and programmed to parallel parking maneuver. In this approach, infrared distance sensor is mounted on the car to find parking space, localize the vehicle position and avoid obstacles. Experimental and simulation results show good performance in the algorithm for parking system under parallel parking. Parking maneuver is safer and efficient through using these advanced safety techniques for parking. Simulation results obtained with the presented system are applied for semi-active parking assistance system.
The Study of Detecting of Real Time of Printing
Authors: Jiang Dong Sheng
Published: January 2012

In the orientation of presswork, this paper prospects that an offset of presswork is a limited numerical value. The numerical value of offset is confirmed from register. These dates will be transferred to paper advance mechanism for its revised. This paper prospects a rapidly detect arithmetic whether a presswork has deflection. In detecting of presswork, if the orientation of presswork and the detecting of quality will be integrated, it will rapidly find the area of blot and revise the quality of printing.
Implementation Perspectives of Wireless Sensor and Actuator Networks in Smart Grid
Authors: Veleva Sanja , Davcev Danco
Published: January 2012

Today’s scarcity of power generation and complex distribution through the electric power systems can not address the trend of increasing demand and consumption of electricity. The monitoring and control of the electric power systems through wired communications require expenses in material, staff, and usually fail in the effective communication for fault diagnostic and protection. In this article we discuss the possibility for the Wireless Sensors and Actuators to address this challenge and provide an optimization of the management for the electric power systems. By embedding the positive influence over the three major power systems: power generation, power delivery, and power utilization, Wireless Sensor and Actuator Networks (WSANs) emerge as an enhancing technology for the next generation of electric power systems, Smart Grids. In this paper, we present an overview of the functionalities of the WSANs in Smart Grids, their advantages over traditional networks, and their architectural characteristics in a way of supervision and control of the power system, by improving the balance between the power supply and demand, and therefore avoiding energy shortages.
Horn of Car Sensitive Controlled System for Helping Deaf Drivers and Improving their Driving
Authors: Mohammadi Sasan , Mesgarha Samaneh Gholi
Published: January 2012

This paper presents a method for helping deaf persons during the driving. Deaf persons are most vulnerable people in driving. Car accidents are always ambushing the deaf persons. Using the horn is very necessary in a safe driving but whereas the deaf person can not sense this alarm it can be dangerous for them.By this paper we introduce a voice sensitive controlled system that can be recognize the voice frequency and show a visual alarm instead of it. We have specialized this system for horn of car sound and equipped the deaf `s car by this system. The purpose of this system is recognizing the voice upon to the frequency of it. In continue we designed and introduced this system.
Research and Summary on Reliability of Relay Protection System
Authors: Zhang Jing Jing
Published: January 2012

In electric power system, relay protection system can powerfully safeguard secure and stable operation of the first circuit equipment; it’s an important task to ensure reliable operation of protection system. Research on reliability of it now arises much attention at home and abroad. The paper carries out detailed research survey on reliability of relay protection system, which contains AC input circuit, digital relay protection equipment and operation output circuit. In general it also contains automatic equipment and telecommunication network etc. It belongs to repairable system; state-space method and fault-tree method are main analysis methods. Each protection has its own principle and structure, the modeling of which is different. The paper discusses the reliability modeling and index system of protection system from three aspects, whose failure models are hardware and software construction, main protection and backup protection construction and construction with relation to operation mode of power system. With the vigorous development of DG in smart grid, the prospects of reliability evaluation of wide area adaptive protection system are presented.
A Study on Compression Processing Technology of Static Images
Authors: Cao Yue Qin
Published: January 2012

With the rapid development of computers, communication and multimedia electronic products, application of high quality images is becoming more and more popular. Improvement of image quality is a very important subject at present. Basic on compression technology of static images, this subject raises adaptive quantitative methods for different images, adopts secondary calculation method during quantization, and then gives simulation validation to images by Matlab software. According to the rate of high-frequency and low-frequency of images, adjust quantization table to make the best effort of image compression.
Wireless Identification System Based on Radio Frequency Technique
Authors: Han Cheng Hao , Ren Ye , Shang Bing
Published: January 2012

Using radio frequency technique, the reader machine will load call signal into 70MHz radio frequency, and send to response machine wirelessly. The call signal will be sent to the control of response machine by circuit coupling, demodulation, voltage comparator. The control will analyze and identify the call signal, send the stored 4-bit binary code back to the reader machine by transmitting modulation circuit, and display the detail of response machine.
Research of Improved Credibility Theory for the Fault Diagnosis of Condenser
Authors: Hu Jia Yuan , Huang Yan , Cao Shun An
Published: January 2012

Research on fault diagnosis of condenser has a great significance to safe and efficient operation of power plant. In view of shortcomings of existing diagnosis methods, this paper proposed a fault diagnosis method of condenser based on improved credibility theory，and applied the merits of credibility reasoning to the fault diagnosis of condenser. By proposing a more rational expression way of symptoms and some mathematical equations which can convert field data into symptoms’ credibility, this paper provided a solid basis for acquiring symptoms’ information accurately. Meanwhile, the setting method of rule confidence of credibility rule was improved, which can make the process of credibility reasoning closer to human experts thinking. Experiment results show that this model meets the demand of condenser fault diagnosis well and has important theoretical significance and practical value.
Direct Slip Linear Control of Three-Phase Induction Motor with One Phase Open-Circuit Fault Based on Three-Level Inverter
Authors: Wu Yi Feng , Deng Zhi Quan , Wang Yu
Published: January 2012

In order to realize high power and reliability of speed control system, fault-tolerant induction motor control system based on three-level inverter is studied in this paper. Based on three-level inverter, a fault-tolerant inverter topology with an extra leg providing the current path during the post-fault operation is proposed. A corresponding control strategy is investigated to avoid voltage drift of the dc link midpoint. In this paper, an induction motor direct slip linear control (DSLC) is employed and investigated to reduce torque ripple and flux magnitude deviation in three-level system. Both simulation and experimental system have been set up to verify the effectiveness of the proposed control strategy.
Speed Closed-Loop Control for Switched Reluctance Motor with Segmental Rotors Based on Angle Position Regulation
Authors: Fan Na , Deng Zhi Quan , Chen Xiao Yuan , Mao Yu Yang , Xu Pei Lin
Published: January 2012

This paper describes the structure and the magnetic circuit of switched reluctance motor with segmental rotors (SSRM), and presents the control strategy of speed closed-loop by regulating the turn-on angle of the main switches in the power converter based on PI algorithm. The turn-off angle is optimized according to different speeds of the motor. The deviation of the rotor speed is the input control parameter of PI controller, and the turn-on angle is the output control parameter. The strategy of current chopping control is used for comparing with angle position control when rotor speed is high. Both the simulation and experimental results show the well transient, steady performance and robustness of SSRM based on the angle position controller.
Numerical Simulation of Subway Train Vertical Random Vibration Load in Time Domain
Authors: Qin Ya Zhou , Xu Jian Cong , Wang Ding
Published: January 2012

It is of importance to identify the subway train random vibration load correctly. On the basis of the in-situ dynamic response measurement, the deterministic data for vertical acceleration of rail were obtained. The problem of identifying the random vibration load of subway train was solved in Matlab, according to the simplified vibration model of vehicle system, and in Newmark-β method. Then the time curve and the amplitude spectrum curve of the vertical random vibration train load were obtained. Compared with Fast Fourier Transform method, Newmark-β method is more simple and practical to simulate the train vertical random vibration load directly in the time domain.
Obstacle Avoidance Scheme for RFID Based Mobile Robot in Libraries
Authors: Zhang Ling , Ling Bing , Luo Wei , Liu Xin Xin , Pang Yue Xin
Published: January 2012

This paper proposes an obstacle avoidance scheme of a novel mobile robot system for automatic search of books in libraries based on the radio frequency identification (RFID). Nowadays, most of the libraries utilize the barcode identification technique, since it is of low cost. However, our experiments show that using RFID adequately can save more labor and improve the library management efficiency, since RFID has many advantages, i.e., large information storage and long identification distance, etc., whose application in library management information system has great development potential. Based the advantages of its long-distance identification ability combined with the close accurate positioning technologies, an intelligent mobile robot system for automatic search of books anywhere in libraries is design in our project, which can effectively improve the book search efficiency, saves the massive cost and improve the library informatization level. According to this mobile robot, we give a fuzzy multisensor fusion technique based obstacle avoidance method, which can make the intelligent robot searching the desired books automatically in libraries. Both the simulation and the actual experiments validate the obstacle-avoiding algorithm.
The Analysis of Leakage Magnetic Field in the Large-Capacity Transformer
Authors: Zeng Lin Suo , Wang Hao
Published: January 2012

With the increase of transformer capacity, local overheating caused by leakage magnetic field affects the normal work and safe problems of transformer. How to reduce the additional loss and eliminate local overheating must be paid full attention to the design and manufacturing process of large transformer. In this paper, the leakage magnetic fields of clamps, clips and tank are analyzed. The distribution of leakage magnetic field in various parts of the transformer is obtained. Results of the analysis according with the engineering practice will be helpful for the optimal design of transformer.
Partner Cooperation and Competition Game of Energy-Saving Chain in Building Engineering and Cooperation Promotion Mechanism
Authors: Li Hui , Zhang Jing Xiao , Zhou Tian Hua
Published: January 2012

By describing the relation between business partners in the energy-saving chain of building engineering, this paper revealed the formation and evolution of business partner relationship in the energy-saving chain of building engineering, proposed the selection method of business partner, and made discussion on the game model of cooperation and competition between participants when at least one party was active participant, and then put forward multiple feasible mechanisms to promote the cooperation in energy-saving chain of building, including reward and punishment mechanism, supervision mechanism, reputation mechanism and so on.
Research on Driving Mechanism and Movement Principle of Underwater Glider
Authors: Su Dong Hai , Zhang Yu , Shi Ying , Yang Kuo
Published: January 2012

In this paper, firstly, the organization structure and working principle of gliders are introduced. Secondly, the buoyancy driven principle of gliders as well as the composition of buoyancy drive system is given. Thirdly, the stationary movement state is analyzed and the law of motion about the steady gliding as well as steady spiral rotation in vertical space are given and the principles, control method of vertical steady glide as well as spiral steady rotation in space are also given, which provides an important theoretical basis with the movement control of underwater gliders. Finally, the vehicle’s underwater experiment was completed. The results of experiment proved that the theoretical analysis is correct and also verified that the design of vehicle is rational, which could meet the requirement of control.
Fabrication and Characterization of Nanoscale Porous Copper Film
Authors: Ding Liu Wei , Geng Hao Ran , Xu Jing Hua
Published: January 2012

Cu-38Zn thin film (wt %) was deposited on the unheated microscope glass at the nanometer scale by DC magnetron sputtering. Subsequently, the nanocrystalline films were dealloyed in H2SO4 aqueous solution etching of zinc component, resulting in the formation of nanoscale porous copper film with average porous diameter of approximately 94 nm. The films microstructure and element composition were characterized by X-ray diffraction and scanning electron microscopy. The experimental results show that Cu-38Zn films are quasi-amorphous structure, porous copper film with different porous sizes is prepared by selective dissolution of zinc atoms from a nanocrystalline dual-phase film under free corrosion conditions, the grain size of the Cu-Zn films has an important effect on the dealloying process and the microstructures of the nanoscale copper films.
Multivariable Grinding Circuit Control: An Modifed Analytical Decoupling Control Approach within a Unity Feedback Control Structure
Authors: Zhou Ping , Gao Yu Zhi , Chai Tian You
Published: January 2012

Grinding circuit (GC) of mineral processing industry is characterized by its multivariable, high interacting, time-varying parameters and large measurement delay nature. The product particle size and the circulating load of the GC are two important production indexes that directly related to performances of the subsequent beneficiation process and production rates of the overall mineral processing plant. However, they are usually difficult to be controlled effectively with conventional control strategies due to the above mentioned complex characteristics. In this paper, a modified analytical decoupling control (ADC) scheme is proposed to handle such an intricate multivariable process with large output delay. Control studies have been performed by simulation tests for setpoint tracking, disturbance rejection and robustness problems.
Emergency Passive Optical Access System’s Architecture Design and Network Simulation
Authors: Yin Shu Hua , Xie Dong Hong , Liu Zhen Ming , Wang Bo Ning
Published: January 2012

The emergency optical access system is proposed for communication interruptions caused by irresistible natural disasters. The system which is based on EPON adopts modular design and realizes hardware and software’s organic integration. By using dynamic bandwidth allocation algorithm, the system can provide an integrated access of data, video, voice and multimedia business on the same platform. It uses the G.652 optical fiber. When the transmission distance is 20 kms, it reaches the system’s capacity as the downstream and upstream rates are 1.25 Gb/s. The system performance is simulated and verified through network software, and it provides grounds for the system’s organizing and management in a mobile environment.