bluuebunny/crossref_metadata_2025 huggingface dataset:
Designing of the Urban Public Bus Operation Dispatch System
Authors: Wang Hong Gang
Published: December 2012

The urban public bus operation dispatch system is one of the most important systems in ITS (Intelligent Transportation System). This paper describes the system in detail, including the system’s architecture, the bus onboard equipment and the system’s software part etc. Through integrating the single chip module, GPRS module, GPS module and other modules, the bus onboard equipment is designed. According to the object-oriented software engineering ideas and using UML (Unified Model language), the software system is designed. Finally, the bus onboard equipment and the system software part can send information each other using GPRS technology. The system has been implemented using Visual Studio 2005 C# language and tested in laboratory.
Design and Development of Upper-Computer Software for AC Servo System
Authors: Chen Lin , Liu Xiao Lin , Pan Hai Hong
Published: December 2012

In order to monitor and control the parameters of AC servo driver, and also operate the condition of AC servo motor from upper-computer in real-time, a modularized architecture of software of upper-computer was presented. This software with well-designed human-computer interface and powerful function was developed by Visual C++ 6.0 and designed by the principle of object-oriented according to the requirements of users. An experimental platform was set up to test the software functions. The experimental results have proven that the developed software can realize the communication between the upper-computer and AC servo driver; it can also monitor and control parameters and including operation status of the AC servo motor. Meantime, the upper-computer software can read or write 149 sets of configuration parameters. These results indicate the developed software is convenient for users to control the AC servo driver.
System Analysis and Numerical Simulation of Land Subsidence in Shanghai
Authors: Wang Guo Dong , Kang Jian Cheng , Yan Guo Dong , Han Qin Chen
Published: December 2012

Land subsidence has become a major geological hazard in Shanghai . Based on the view of system theory, The paper sets a numerical model of land subsidence, the results of model simulation are as follows: 1) the speed of land subsidence will be 8.81mm/a in Shanghai in the next 10 years if it can maintain present trends of load increase and groundwater mining; 2) Since 1998, we adjust the ratio of groundwater extraction and filling to 1:1, the accumulated quantity of land subsidence will rebound to 30mm in 2017, from 2018, it will continue to drop. However, the overall future land subsidence will keep the trend of slow growth; 3) Double the exploitation capacity in1998, the speed of land subsidence will be 41mm/a in 2020, the accumulative quantity of land subsidence will be close to 1m. According to the average high tide level (5.15m) in the Huangpu River in 2000-2008, the actual average high tide level of the Huangpu River will reach about 6m and exceed the orange warning response against flood and typhoon in Shanghai. If superimposing sea level rise and strong typhoon disasters, it will face with more serious flood risk.
Modified Block Symmetric SOR Preconditioners for Large Sparse Saddle-Point Problems
Authors: Zhang Li Tao , Cheng Shao Hua
Published: December 2012

In this paper, based on the preconditioners presented by Wang [On hybrid preconditioning methods for large sparse saddle-point problems, Linear Algebra Appl., 434 (2011) 2353-2366], we introduce and study the block symmetric SOR (BSSOR) and the modified block symmetric SOR (MBSSOR) preconditioners for the block traingular product approximation to a 2-by-2 block matrix and these preconditioners are the generalization of BSGS and MBSGS preconditioners presented by Wang. Moreover, we analyse the properties of the corresponding preconditioned matrices.
Combining Multiple Ontologies Using Ε-Connections
Authors: Zheng Shu Ling , Tang Su Qin , Sunderraman Rajshekhar
Published: December 2012

Ontology reusing has been extensively researched. Ontology connection is one of the ways which can reuse ontology that has been studied lately. Ε-connections and bridge rules are two ways of connecting ontologies. Based on these two methods, and using the ontology editor tool SWOOP, the link properties of the classes from different ontologies can be defined. Using these link properties, the multiple ontologies we are connecting can be reused effectively.
Research on the Evaluation Models of Network Video Users
Authors: Ni Xuan , Luo Lan , Cao San Xing
Published: December 2012

Evaluation model is widely used in the individuals and enterprises. Because of the rapid development of the Internet video transmission, the request of the credibility of the video portal is much higher. So the research of the Internet video portal evaluation model becomes a significant issue. This paper realized the evaluation and classification of the user group based on the data mining evaluation classification technology and the principle of fuzzy clustering, and through the construction of the mathematical model and behavioral analysis of Internet video users. This paper also evaluates the effectiveness of the model through the existing evaluation model algorithm and the analysis of the samples.
Study on Scene Rendering Using Ray Tracing
Authors: Li Zhi
Published: December 2012

The paper synoptically discusses the basic technological process of the ray tracing method, analyzes its parallel algorithms. Introduce the recent research focus of the field from study on real-time ray tracing and based ray tracing of graphics hardware. Point out the advantages and disadvantages of the ray tracing algorithms to solve scene rendering as well as future research priorities.
The Research on the Reliability of Computer Information Systems Based on Bayesian Networks
Authors: Yang Min , Guan Rui , Deng Ming , Yu Yan Ping , Qian Zheng Ming , Li Zhi
Published: December 2012

This paper applied Bayesian Networks to the analysis of the reliability of computer information systems. After studying the internal structures of the systems, we divided the factors affecting the system reliability into two parts. One is the part of components and the other is the part of connections. Treating the components and connections as nodes, we then constructed a Bayesian Network of computer information systems. Based on the individual probability of each node we calculate the respective reliability of the component subsystem, the connection subsystem and the entire system. In the fourth part we gave a specific example. It was found that the reliability model based on Bayesian Networks had a good diagnostic function, which could help decision-makers to find the reasons for the unreliability of the system.
Design and Implementation of FFT Module Based on Virtex Series FPGA
Authors: Zhang Xu Hui , Wu Ming Yang , Lin Hai Jun , Tang Zhen Zhen
Published: December 2012

In order to achieve real-time data output in synthetic aperture radar (SAR) imaging system, high-speed FFT transformation is needed. In this article, we proposed the program that uses the new generation of high-speed, large-capacity Virtex series FPGA to implement radix-4 FFT algorithm and simulated it with the Modelsim software, and then through the comparative analysis of simulation results by MATLAB. After analyzing the results compared with MATLAB simulation, it shows that FFT module has stable performance, fast operation and fully meets the radar data real-time processing requirements.
The Quantified Evaluation Method of Project Test Based on Multi-Computing
Authors: Liu Yi Gang , Liao Si Zhe , Liao Bing Bing
Published: December 2012

With the rapid development of power industry in recent years, the grid information technology and intelligent building is also ongoing a fast growth which brings more pilot projects and integrated projects. Because of the growing number and types of projects, it is increasingly difficult to evaluate whether the project can meet customer needs, whether the contractor is capable to undertake the projects and whether the projects are suitable for the integration of construction. This paper analyzed on the basis of the characteristics of power grid projects, combined with the basic flow of software project test and proposes a project test quantification evaluation method of project test based on multi-computing. This method achieves the quantitative appraisal of projects, selecting the best project contractor and improving the quality of the project completion through test case scores quantification and multi-computing test scores.
Designing Highly Intelligent Unmanned Aerial Vehicle-Borne Software
Authors: Zhou Bao Yu , Tian Li
Published: December 2012

The existing software borne by an unmanned aerial vehicle (UAV) is mostly made up of functional modules with a simple design for meeting its functional requirements, thus being unable for the UAV to meet the requirements for its software to be intelligent, integrated and credible. To meet the requirements for the new-type UAV to be functionally varied, highly autonomous and intelligent, we construct the intelligent database and the network-adaptive and real-time middleware so as to greatly enhance the intelligence of the UAV-borne software and the autonomous flight capability of the UAV, paving a firm foundation for enhancing the functional diversity, autonomy and intelligence of the future advanced UAV.
Food Safety Test Information System Design
Authors: Chen Kai , Tan Hong , Yang Hong Bo
Published: December 2012

Informatization of food safety supervision overviews in China and some other countries were studied. With the combination of food safety supervision characteristics in Guizhou and quality system requirements for national food inspection laboratory, information management system for food safety in Guizhou was proposed. A knowledge database for categorizing determination factors of food hazard was established. This system was implemented in the food safety supervision of circulation links in Guizhou for 3 years (2009-2011). It solved problems such as quality control for massive sampling inspections and data analysis. Besides improving work efficiency, it provided scientific basis for decision making of food safety supervision to government as well as data support for food safety forecasting and warning system.
On a Multiple Hardy Hilbert Type Integral Inequality
Authors: Sun Bao Ju
Published: December 2012

By Introducing the Norm || .||and Two Parameters α ,λ, we Give a Multiple Hard|y-Hilbert Type Integral Ineλquality with a Best Possible Constant Factor.
Overview of Privacy Protection Technology Based on Database Application
Authors: Wei Hai Fang , Wang Bei Zhan , Deng Xiang , Wu Ai Hua
Published: December 2012

With the emergence and development of data applications such as database and data mining, how to protect data privacy and prevent disclosure of sensitive information has become one of the major challenges we are facing now. Privacy protection technologies need to protect data privacy without compromising data applications. The research results of privacy protection field are summarized, and the basic principles and features of various types of privacy protection technologies are described. After the in-depth analysis and comparison of existing technologies, this paper points out the future direction of the privacy protection technology.
OPC UA Information Modeling: A Case Study for Smart House
Authors: Yi Myeong Jae , Son Mai
Published: December 2012

Nowadays automation systems become more and more heterogeneous with various technologies and standards from different companies and vendors. Each technology has its own concept to model and present process data, leading to the need of a uniform view for the whole systems. OPC UA specification, the next generation of Classic OPC Standards, was introduced as a promising standard that is a good solution to address the issue. Some remarkable advantages of OPC UA have attracted attention: (i) information modeling, (ii) high-performing communication, and (iii) enhanced security mechanism. This paper aims at contributing in the first and big advantage of OPC UA, information modeling concept. Whereas Classic OPC has a poor and simple meta-data model providing tags, OPC UA uses standard information models to lift interoperability to the next level. It allows not only interoperable data exchange but also interoperable model. In our work, information modeling concept based on object-oriented techniques is exemplified by means of a case study for Smart House.
The Research on Computation Resource Scheduling Strategy for B2C Automatic Negotiation in Cloud Computing Platform
Authors: Han Hai Wen , Zhu Zhi Fei
Published: December 2012

The scheduling mechanism for cloud computing platform is described at first in this paper. Secondly the analysis of the B2C auto-negotiation process and the characteristics of its computation resource scheduling mechanism are given. Finally some computation resource scheduling strategies for B2C auto-negotiation in cloud computing platform are discussed.
Construction of Online Informal Learning Environment Based on Digital Bloom
Authors: Wang Yan Li , Cheng Yun
Published: December 2012

Informal learning is an important learning form in today’s knowledge society. This article introduced the concept of Digital Bloom, and discussed its great guiding significance for informal learning, then proposed an informal learning environment model based on the research of Digital Bloom, and illustrated the model detailedly from its composition, the learning model and the support system so as to provide some reference for improving informal learning quality.
Design and Application of Integrated Diagnosis Inference System
Authors: Xu Bo , Feng Wei , Yu Jin Song
Published: December 2012

This paper proposes a new integrated diagnosis inference system based on the framework of C Language Integrated Production (CLIPS) and Bayesian networks (BNs). Utilizing the fault modeling, model verification, model analysis, model conversion and knowledge base generation, this system deals with the conversion from the fault flow diagram to knowledge base, the fault tree to BNs, simplifies the method for knowledge base construction and fault modeling, and enhances the methods to obtain the knowledge for intelligence fault diagnosis system.
Dependency Injection mechanism in Intelligence Information System of Power Quality
Authors: Gong Jian , Lv Cui Hong , Qi Lin Hai , Ma Su Xia
Published: December 2012

The calculation subsystems of the power quality intelligent information system will face many types of monitoring data source, and when different data sources provide data for calculation subsystem, it does not need to change algorithm but need to change the way how to get the data needed; then how to make the calculation subsystem does not alter with the change of data provider becomes a necessary demand;Aiming at the problem this paper put forward a set of solutions, which are dependent on dependency-injection, to help the calculation subsystem in multiple data source supporting.
An Improved Supervised Word Sense Disambiguation Methods in the Biomedical Domain
Authors: He Jia Cong , Ren Kai , Yu Wei Jie
Published: December 2012

The effectiveness of supervised word sense disambiguation approaches depend in part on the availability of initial dataset. In the paper, we use an improved method based on the simple K-means clustering function, the result indicates the improvement after using the method. The whole experiments are running on the NLM WSD set, which is emphasizing on the biomedical domain.
Design and Implementation for universal Privilege Management Infrastructure
Authors: Li Jin
Published: December 2012

For analyzing the multilayer structure of the J2EE, based on Role-Based Access Control, a model of privilege management infrastructure was designed. It was implemented after the discussion of the existing privilege management system. Moreover, the safe authority control was realized with good effect.
Automatic Tortuosity Classification Using Machine Learning Approach
Authors: Turior Rashmi , Chutinantvarodom Pornthep , Uyyanonvara Bunyarit
Published: December 2012

Retinopathy of Prematurity (ROP) is a vital cause of vision loss in premature infants, but early detection of its symptoms enables timely treatment and prevents blindness. Tortuosity is the major indicator of ROP that can potentially be automatically quantified. In this paper, which focuses on automatic tortuosity quantification and classification in images from infants at risk of ROP, we present a series of experiments on preprocessing, feature extraction, image feature selection and classification using nearest neighbor classifier. Fisher linear Discriminant analysis is used as a feature selection algorithm. We observe that the best feature set is a combination of two features: tortuosity as estimated based on combination of curvature of improved chain code and number of inflections and tortuosity as measured by inflection count metric. Accuracy, sensitivity and specificity are used as performance measures for the classifier. The results are validated against the judgments of expert ophthalmologists. The overall accuracy, sensitivity and specificity achieved on the best feature set are 95%, 95.65% and 96.74% respectively.
Deconstructing Web Services
Authors: Shi Chang Guang
Published: December 2012

Many experts would agree that, had it not been for telephony, the construction of B-trees might never have occurred. Given the current status of random theory, information theorists urgently desire the unfortunate unification of virtual machines and voice-over-IP, which embodies the unproven principles of robotics. We show that even though voice-over-IP and e-commerce can collaborate to achieve this goal, courseware and Internet QoS can synchronize to realize this mission.
Service Discovery Architecture Applied in Cloud Computing Environments
Authors: Zhang Jie , He Li Wen , Huang Fei Yi , Liu Bin
Published: December 2012

This paper proposed a service discovery architecture (SDA) that can be applied in cloud computing environments. This architecture supports common service discovery capabilities to achieve cloud service discovery function in cloud computing environments. The main idea is that, cloud services can be divided into different cloud service domains (CSD) according to the characteristics of the functions of cloud services, each CSD has a sub-service directory, and there is also a root service directory above all sub-service directories. Setting of two-level service directories can achieve the most suitable massive cloud services quickly. Finally, through mathematical modeling, theoretical analyses, and numerical simulations, the performance analyses of the architecture are studied. The results show the validity and advantages of the SDA.
Research on Exhibition Logistics Information Platform Construction
Authors: Zhang Shi Xiang
Published: December 2012

Learning from the successful experience of the 2010 Shanghai World Expo, modern logistics industry offers tremendous opportunities. Under this condition, the paper predecessor analysis on the basis of the design of large-scale comprehensive exhibition logistics network operating programs, solutions of the logistics industry is pointed out faced with the logistics of the extended time, the complicated logistics and other issues. A well operated exhibition logistics system and its information system are designed with several advantages.
Method of Design and Implementation Cloud Service
Authors: Duan Long Zhen , Duan Wen Ying
Published: December 2012

In order to satisfy tenants’ customization requirements, cloud system should adapt to constantly variable requirements and variety in business area. So, a novel method constructing cloud system in flexible SaaS patterns is proposed. Following the guidance of flexible thought, the method introduces a series of steps containing service division, constructing service level and so on to help developer analysis and design the whole structure of services and its extensible functions, then, by means of software development based on plug-in and dynamically assembling framework Equinox, services and plug-ins are dynamically assembled into complete services for tenants. Finally, to confirm the maneuverability and effectiveness of this flexible method, it is introduced into a communication project.
An Electric Power System Fault Diagnosis Method Based on PSO and FCM
Authors: Cheng Jie
Published: December 2012

For effectively analyzing electric power faults, exactly identifying failure type, and highly providing disposal measure, depending on PSO (particle swarm optimization) algorithm, a PSO-FCM (particle swarm optimization-fuzzy c-means) algorithm was constructed by the FCM improvement of fuzzy clustering to avoid get in local optimal state. On this basis, an electric power system fault diagnosis method was established by means of PSO and FCM. Finally, this method was validated by an example. Consequently, this method can intellectively diagnose and identify the fault of electric power system, and can provide a new approach to stably operation in electric power system.
Error Analysis of the Micro Temperature Control System
Authors: Han Zhen Wei , Song Kei Fei
Published: December 2012

In order to improve the measurement accuracy of optical detection instruments, temperature control circuits for narrow band-pass filters are given, and the error analysis is applied to temperature control circuits.The principle of a temperature measurement circuit is studied and the method of a driver circuit is described. A variety of influencing factors of temperature control accuracy are discussed. Moreover, for these error factors, improvement measures are given to reduce the nonlinear error. Finally, circuit parameter error is quantified to propose a calculation method for margin of error in a temperature control system.
An Improved Wide Area Travelling Wave Fault Location Algorithm
Authors: Chen Yu , Liu Dong , Xu Bing Yin
Published: December 2012

In order to enhance the reliability of traveling wave fault location (TWFL) systems, an improved wide area traveling wave fault location (WA-TWFL) algorithms is presented in this paper. In the disturbance area that near to the fault position, we can first get the possible fault positions by using the outgoing path data from the substation that first records the initial traveling wave, then use the possible fault position to verify the reasonableness of data recorded. The fault position that has no counter-example in logical is the real fault position. EMTP simulation verifies the validity and applicability of this algorithm.
Research on Equipment Maintenance Support Capability Evaluation Based on Cloud Theory
Authors: Gu Hong Qiang , Zhang Cheng , Shi Quan
Published: December 2012

Equipment maintenance support capability is an important part of operational capability and the evaluation of equipment maintenance support capability is very important to the establishment of battle effectiveness. Cloud theory is applied to equipment maintenance support capability evaluation on basis of the establishment of the evaluation index system of equipment support capability. The application steps of cloud barycenter evaluation method to equipment maintenance support capability evaluation are analyzed. The evaluation result is achieved using weighted deflection degree which is used to demonstrate the deflection degree between equipment maintenance support capability and its perfect state. The correctness and validity of the proposed method is verified by the calculating result, which provide an efficient method for equipment maintenance support capability evaluation.
Cause Analysis of Digital Substation Main Transformer Differential Protection Misaction
Authors: Wang Tian Min , Gao Bo
Published: December 2012

Based on the analysis of a 110kV digital substation main transformer differential protection action situation，pointing out that the malfunction cause of the trip， give out the improvement program，improve the understanding of the GPS in the digital，and recognize the the importance of intelligent substation．Provides a theoretical and application for the proper preparation of the same type of protection device，thus effectively avoid the protection device in the series malfunction again．
One Fusion Approach of Fault Diagnosis Based on Rough Sets Theory and Dempster-Shafer Theory
Authors: Su Yan Qin , Cheng Ji Hong , Xu Ting Xue
Published: December 2012

There is the advantage of Rough Sets Theory for redundant condition reduction and D-S Theory for combination rules reasoning, one fusion approach based on the two theories was given. Firstly, the test data was discretizated and attribution reduced to get the reduction decision table. Then, the basic probability assignment was gotten through calculating the condition attribution of the decision table while the condition attribution was regarded as evidence input and the decision attribution as discernment frame. Finally, the evidence was combination reasoned and the fault diagnosis results were gotten, and the application example was verified its validity.
Research of Image Compression Based on Fractal Coding
Authors: Wang Dong Mei , Lu Jing Yi
Published: December 2012

The EZW and Fractal Coding were researched and simulated in this paper. And two drawbacks were discovered in these algorithm:the coding time is too long and the effect of reconstructed image is not ideal. Therefore, The paper studied the wavelet transformation in the fractal coding application, The wavelet coefficients of an image present two characteristics when the image is processed by wavelet transform: first characteristic is that the energy of an image is strongly concentrated in low frequency sub-image, second characteristic is that there is a similarity between the same direction in high frequency sub-images.but the fractal coding essence was precisely uses the similarity of wavelet transform image. The paper designed one kind of new Image Compression based on Fractal Coding in wavelet domain. The theoretical analysis and the simulation experiment indicated that, to some extent the method can reduce the coding time and reduce the MSE and enhance compression ratio of the reconstructed image and improve PSNR of the reconstructed image..
Research on the System of Supercapacitor Parameters Measurement Based on High and Constant Current Control
Authors: Li Xing Hua , Li Yuan Peng , Zou Mao Hu
Published: December 2012

High and constant current charging and discharging is necessary to improve the precision of supercapacitor parameters measurment. In this paper, three topics are discussed for high-precision measurment of supercapacitor parameters. Firstly, the analysis of the principle of capacitance measurement was described. Secondly, a model of high and constant current control was presented. The model used in the system of supercapacitor parameters measurement was in order to ensure the constant-current accuracy. Finally, several software compensation methods were used to improve accuracy. And then, the experiment results between our system and the American Arbin Instrument Company’s Super Capacitor Test System were compared. The system designed by us shows good performance of high precision measurement.
Prediction of Calibration Value for Inertial Instrument Based on Genetic Neural Network
Authors: Hu Zheng Dong , Yang Tao , Wang Yue Ping , Tang Xue Mei
Published: December 2012

Based on the former calibration data of error coefficient of inertial navigation instrumentation and environment parameters, a three-layer BP neural network is founded to predict the calibration value in current circumstances. To confirm the structure of neural network, genetic algorithm is used to seek the optimal solution, and hence the concept of genetic neural network is introduced. Also since the calibration data has small-sample characteristics; Bayes regularization method is adopted to improve the network generalization ability and predicted performance. In the end the simulated results show that it is reasonable and effective to accomplish the prediction in genetic neural network.
High-Speed and Robust Scene Matching Algorithm Based on ORB for SAR/INS Integrated Navigation System
Authors: Chen Fang , Xu Yun Xi
Published: December 2012

It is important that scene matching algorithm should satisfy the requirements of real-time, robustness and high-precision for inertial integrated navigation system. And considering the serious distortion and speckle noises of SAR images, we proposed a new scene matching algorithm for the SAR/INS integrated navigation system with high-speed and robustness based on Oriented FAST and Rotated BRIEF (ORB). We started by detecting scale-space FAST-based features in combination with an efficiently computed orientation in the image. Then, we calculated feature point's Rotation-Aware BRIEF descriptor which performs well with rotation and match features by computing Hamming distance between descriptors. Finally, we adopted GroupSAC which are proposed recently to remove the false matching points and the least square algorithm for getting the distortion transformation parameters that are the aircraft position errors and rotation transform parameters between real image and reference image. Experimental results on real SAR images indicate that our algorithm is invariant to various image transformations due to rotation and scale, and also robust to speckle noise and extremely efficient to compute, better than SIFT in many situations. Therefore, our algorithm can meet the high performance needs for matching navigation in the SAR/INS integrated navigation system.
Explanation of Doubtful Points of API Round Thread Casing and Coupling Thread Standoff
Authors: Fu Yu , Wei Zun Yi , Bai Xiao Liang , Feng Na , Wu Jian , Ai Yu Feng
Published: December 2012

This article introduces briefly the design feature of thread gauges used in the inspection of API round thread casing and coupling thread standoff, and expounds some questions relating to the extending amount, the positive and negative sign of standoff P and P1, the thread number of hand tight standoff A and the revising of short round thread standoff, which may be ignored easily in the control and inspection of the casing and coupling standoff. The article also gives the right inspecting procedure of the round thread casing and coupling thread to avoid erroneous judgement in the course of standoff inspection.
Study of a Calibration Method of the OCTG Standard Template Based on Coordinate Measuring Machine
Authors: Bai Xiao Liang , Ma Xiao Fang , Fu Yu , Han Xin Li , Wei Zun Yi
Published: December 2012

Using coordinate measuring machine(CMM) PMM12106 to measure the standard template, various factors will affect the accuracy of its calibration results. Based on system analysis of the various factors in the calibration process, application of test data, the paper proposed a new calibration method considering the key factors, like measuring rod deflection, probe diameter, and temperature and so on, evaluated the uncertainty in measurement, then programs. Compared to NIM data, it concludes that the measurement data is accurate, reliable, and suitable for the calibration of the standard template whatever it is API standard template or Premium-thread standard template.
Electrical Properties of Polycrystalline α-HgI2 Detector
Authors: Liu Gong Long , Yang Liao , Shi Wei Min , Yang Wei Guang , Wang Ya Li , Wang Lin Jun
Published: December 2012

Potentially low cost and large-area polycrystalline mercuric iodide (α-HgI2) is one of the preferred materials for the fabrication of room temperature X-ray and gamma-ray detectors. In this paper, polycrystalline α-HgI2 films have been grown through combining vertical deposition method with hot wall vapor phase deposition (HWPVD) method. X-ray diffraction (XRD), scan electron microscopes (SEM) and Raman spectrum were used to characterization the HgI2 films obtained, and I-V characteristics was also tested. Using the polycrystalline α-HgI2 films, we get the detector. According to the detector, on the one hand, a dark current test is made by using KEITHL EY 485 picoammeter; on the other hand, the Agilent 4294A precision impedance analyzer is taken to test the characteristic curve of its capacitor frequency.
Pedestrian Tracking with HOG and Color Histogram Features
Authors: Guo Lie , Zhang Guang Xi , Ge Ping Shu , Li Lin Hui
Published: December 2012

To improve the effectiveness of pedestrian tracking, the histograms of oriented gradients (HOG) and color histogram characteristics are adopted to track pedestrian based on particle filter. Firstly, the pedestrian is detected using the HOG features to determine the initial target position. Then the target is tracked based on particle filter utilizing color histogram, during which the HOG is used to modify particle heavy weights and particle sampling. Experimental results verify the accurateness and efficiency of the proposed method.
An Inspection System and Measurement Algorithm of Geometry Status of Railroad Tracks
Authors: Li Jun Li
Published: December 2012

A tracks status inspection system based on coordinate transformation matrix algorithm was introduced. The structure, composition, measurement principles, design and test of the inspection system were elaborated. It was composed of two handy carts. Variation of tracks status could be denoted by three relative turning angles under the two coordinate systems of the two carts by means of coordinate transformation matrix, and tracks geometry parameters could be obtained using the matrix recursion algorithm. The instrumentation can carry out inspections such as track height, height irregularity, level irregularity, track gauge, track alignment and triple pit and so on.
Digital Design and Implementation of Measuring Oil Color
Authors: Ling Yun , Liao Chun Hua , Xing Jian Guo
Published: December 2012

This paper introduces an automatic Lovibond colorimeter, which is a system of color measuring, the TCS2300D color sensor and STC12C5A60S2 microcontroller are the cores of the system. The color sensor got the data of samples, and sent to microcontroller, by the bilinear interpolation algorithm, data for RGB color space was converted to the Lovibond color space [1], and last displayed on the tubes. The experimental results showed that automatic Lovibond colorimeter had good correlation with the Lovibond visual method, and the data read from the tubes was stable. With the advantages of low cost, simple operation, short measurement period that the colorimeter will be widely applied to the determination of oil color.
Development of a Self-Power Peak Expiratory Flow Meter
Authors: Wang S. , Gaing Z. , Garcia Ronald , Chang Paul , Chen Chengren
Published: December 2012

For a regular Digital Peak Respiratory Flow Metter, a strain gauge or similar probe is used to detect the strength of the blowing. The signal is then be analyzed by computer. In this innovative Self-Power Peek Respiratory Flow Meter, however, a generator is used. The generator is “one stone for two birds”: it serves as the digital signal generator to present the air flow data; it also provides the energy source to re-power the batteries. This allows people to use the equipment whenever and anywhere without worry of recharge or change batteries. Another advantage of the machine is its reliability. The blowing chamber is separated from the generator by magnetic (shaft-less) coupling, therefore, the moisture from blowing has no way to corrode the electric circuit or contaminate the instrument. Because of this innovative instrument is “Green”, “Digital” and easy of use, the application would be expanded. The Coreless Permanent Magnet Disk Generator technology (AFPM) is utilized to eliminate the cogging torque. Moreover, energy saving circuit design also implemented to make the self-power instrument a reality.
The Application of NetGAP in Electric Mobile Access System
Authors: Dai Zao Jian , Li Xiao Wei
Published: December 2012

NetGap is used to physically isolate the interior-net and the exterior-net, and protect the information transferred between the interior-net and the exterior-net through the electric mobile access system. This paper first introduces the background of the mobile access system and the basic principles of netgap, then analyzes why gap should be used in the mobile access system. Finally, the solution and policy configuration of netgap used in the mobile access system are given.
Modulation Transfer Function Measurement System at Different Contrasts for CCD Camera
Authors: Li Wen Juan , Liang Chuan , Jin Ning Zhi , Zhou Mei Lan
Published: December 2012

In order to achieve MTFs at different contrasts, the MTF measurement system is designed and developed. Two integrating spheres are used to illuminate the face and back of the test target uniformly. The target luminance and background luminance of the test target are regulated by adjusting the attenuators near the entrance of each integrating sphere. The many groups’ experimental results indicate that the luminance differences between the values by the system and those by L88 first level luminance meter, which is checked by National Institute of Metrology P. R. China, are within ±0.3 cd/m2. Thereby the measurement precision can be ensured in MTF test. MTFs of Sony camera and Cannon camera at different contrasts are measured by this system. The measurement values show that MTFs at different contrasts can demonstrate the imaging quality fully and objectively. This study provides an effective method to evaluate the imaging quality of visible imaging systems.
Research and Implementation of the Triangular Wave Pulse Power Device
Authors: Wu Da Yong , Yu Sheng Bao
Published: December 2012

The pulsed power is an important part of the airborne geophysical method detection systems. However, the traditional method of aerial transient electromagnetic transmitted waveform will cause the interference which is not conducive to process the post-data. The paper presents a new kind of dual polarity triangle pulse power device. The experimental results verify the correctness of theoretical analysis by using constant voltage clamping method to achieve emission of the isosceles triangular current pulse. Its falling edge of high linearity, high reliability, the output characteristics of a good anti-interference ability.
PLC-Based Communications Network Design for EV Charging & Swapping Stations
Authors: Ma Lin Guo , Wu Yan Nian , Wang Yuan
Published: December 2012

Electric vehicle (EV) charging & swapping station is an indispensable EV energy service infrastructure after the large-scale industrialization of EV. Power line carrier communication (PLC) is a technology that transmits analog or digital signal with high speed through the carrier. By applying robust and reliable power line as the transmission medium of carrier signal, PLC is featured with stable and reliable information transmission, reasonable routing, no re-wiring, wide coverage, convenient connection, and highly reliable channel. This paper briefly describes the characteristics and applications of PLC technology, introduces functions and an overall design plan for the communication network of EV charging and swapping stations. Meanwhile, it provides the hardware realization and protocol establishment of communications network interfaces for PLC-based EV charging and swapping stations as well as a design for information management system.
Preliminary Experimental Study on Multi-Parameter Measurement of Fluid Flow by Vibrating Tube
Authors: Zhang X.Z.
Published: December 2012

A tube conveying flow under vibration can induce a number of interesting phenomena, which can be used to measure certain fluid and flow parameters. For example, Coriolis flow meter which uses vibrating tube is now acting as a key mass flow rate instrument in industry. However, the complexity of flow often requires several parameters to be measured in one time. We studied the vibration behavior of a single rigid straight tube connected with elastic bellows at each end in a flow pipe line. Electrical exciters were used to force the tube to vibrate. Displacement transducers were used to measure the amplitudes and phases of tube’s vibration. Flows through the tube were water or water-air two-phase. The preliminary experiment showed that density, flow rate, viscosity, as well as pressure, which are important parameters for the flow, could possibly be measured in the same vibrating tube.
An Adjustable Linearization for RF Power Amplifier
Authors: Yue Kai , Ma Xu Biao
Published: December 2012

This paper presented an adjustable analog predistortion linearization method for RF power amplifier. The linearization includes an attenuator, a phase shifter and an anti-parallel Schottky diode pair with DC bias, through adjusting these components, we can adjust predistortion characteristic of the linearization to be complementary to distortion characteristic of RF power amplifier. By cascading this linearization with power amplifier, we can improve linearity of amplifier. Firstly, we simulated the proposed predistortion linearization with software ADS, then the linearization was manufactured and tested together with RF power amplifier PTF080551. Experimental results show that we can adjust predistortion characteristic of the linearization to be closely complementary to distrotion characteristic of power amplifier PTF080551 as desired. After cascading the linearization with power amplifier PTF080551, more than 10dB improvement in IMD3 of the amplifier can be achieved. Furthermore, the linerarizaion is flexible and can be adjusted to linearize different amplifiers.
Online Monitoring and Analysis of Plant Photosynthetic Physiology and Environmental Factors
Authors: Jiang Zhao Hui , Wang Chun Sheng , Zhang Jing , Yue Yi , Li Shao Wen
Published: December 2012

It is very important for researching the growth and cultivation of plants that real-time monitoring of photosynthetic physiology & environmental parameters and analysis of relationship between these parameters. In this paper, an indoor cultivated Michelia alba monitoring system was built, which could continuously monitor leaf's CO2 exchange rate, transpiration rate, air temperature and humidity, soil moisture, photosynthetically active radiation and other parameters in real time, and could also analyze the relationship between the photosynthetic physiological parameters and environmental parameters. The results show that the diurnal variation of indoor cultivated Michelia alba leaf's CO2 exchange rate presents a bimodal pattern, which shows a midday depression. The diurnal variation of photosynthetically active radiation presents a single pattern. The diurnal variation of air humidity presents a “ S ” pattern, but the overall variation is little. The environmental factors that influenced the Michelia alba photosynthetic physiological characteristics most greatly are the photosynthetically active radiation and temperature.
A Current Comparator Based Four-Terminal Impedance Bridge
Authors: Wang Yun Jing , Qu Zheng Wei , Hu Xiao Chuan
Published: December 2012

This paper presents a current comparator based four-terminal impedance bridge for quantity-value dissemination of national AC resistance standard in China. In order to enhance the feedback adjustment ability and simplify the balance process, the bridge applies a frequency selective amplifier instead of feedforward and feedback networks to balance the magnetomotive force of the current comparator. The resistance difference between the measured and standard resistor can be calculated according to their voltage difference indicated by a digital lock-in amplifier. The AC/DC resistance relative differences between Double Helix Resistor and Tinsley standard resistor are measured with the proposed bridge under 1592Hz.
Simulation Research on High-Frequency Response Characteristic of Rogowski Coil Based on the Distributed Parameter Model
Authors: Li Ping , Liang Tao , Cheng Yang Chun , Zhao Liang
Published: December 2012

According to the transfer impedance getting from distributed parameter model,we analyse the influences of the number of turns ,capacitance to the shield and interturn capacitance on the high frequency characteristic of Rogowski coil through theories and simulations. Simulation shows that there are a series of zeros in high frequency band, but on the whole, the high frequency response does not change with the increase of frequency. The number of turns and capacitance to the shield can influence the frequency at which zero appears, but the high frequency characteristic of Rogowski coil can’t be influenced. Considering the interturn capacitance, the curve of high-frequency response characteristic presents a "V" shape ", and this leads to the reduction of higher cut-off frequency. So we should try to decrease the interturn capacitance to reduce the influence on the high frequency characteristic.
Study on Digital Voltage Instrument Transformer Calibrator Based on Principle of High Potential Difference Measurement
Authors: Pan Feng , Hu Jia , Xiao Yong , Sun Wei Ming , Song Qiang , Meng Qin Liang , Zhang Ding Qu
Published: December 2012

Digital instrument transformer calibrator is the key equipment which is applied to calibrate instrument transformers automatically. The instrument transformer based on principle of high potential difference measurement is suitable for calibration of voltage instrument transformer with high voltage and high accuracy, as it avoids being affected by additive error. This paper presents a plan for high precise instrument transformer calibrator based on principle of high potential difference measurement. On the basis of this design scheme, the technology of shielded input-signal wire, input-signal isolated amplification and shielded circuit is adopted to design the instrument transformer calibrator. The produced calibrator is able to fulfill the requirement of self-calibration of power voltage ratio standard due to its excellent performance with high accuracy and stability.
The Research of Fuzzy Self-Adaptiving PID Control Technology on Inverter Power
Authors: Zhao Ke , Li Feng
Published: December 2012

With the development of science and technology, high-powered equipments are increasing demanded in various industrial fields. It is no doubt that higher requirements for power inverter control technology is required. In this paper, on the base of traditional PID control strategy, duo to its paraments can’t self-turning, this disadvantage makes it difficult to achieve the best control effect, proposed a fuzzy self-adaptiving PID control technology. By means of MATLAB/Simulink module to realize the inverter achieves good dynamic and static performance.
Gamma Radiation Effect on the Electrical Properties of PANI Film
Authors: Omar Ahmed , Baraka Ahmad , Zaki Ahmed H. , Sharshar Karam A.
Published: December 2012

The electrical properties of nonconductive polyaniline (PANI) films exposed to gamma radiation for the purpose of gamma dosimeter were presented in this work. By exposing films to doses of gamma radiation up to 10 kGy, the films showed visually apparent gradual change in the current- voltage (I-V) characteristics. Electrical, conductivity also increased regularly in the same dose range. It can be suggested that gamma radiation dose has an effect on transformation of polyaniline in its nonconductive form to polyaniline in its conductive form (PANI-HCl) which may be used for dosimeter in a gamma doses up to 10 KGy.
Low-Frequency Wireless Accelerometer to Bridge Health Monitoring
Authors: Li Qin , Wang Tao
Published: December 2012

According to the requirements and characteristics of the long-span bridge vibration monitoring, this paper presents one kind of low-frequency wireless accelerometer monitoring system based on PIC and MEMS (Micro-electromechanical Systems) acceleration sensor. The system was composed of sensor module, data acquisition and processing module, micro-processing module, wireless transmitting and receiving module, and a computer system. Model 1221 was the sensor chip, the measure data processed by MCU, and transmitted by wireless transmitting module based on Zigbee networks. As the date was received by the wireless receiving module, re process the sensing data by computer, to get the vibration parameter and assess the vibration. The system was validated with standard vibrator.