bluuebunny/crossref_metadata_2025 huggingface dataset:
Study of Improving Support Vector Machine Algorithm Based on Medical Data Mining
Authors: Wu Wei
Published: June 2012

This paper introduces fundamental theory and mathematic model of Support Vector Machine(SVM), and also covers applying SVM algorithm in data assorting. In conventional SVM model, sample set always has noisy and isolated points, for solving this problem this paper proposes a SVM boundary sample cut algorithm: first, pre-select boundary samples, then apply Remove-Only algorithm to remove some inappropriate points, then the result will be final sample set for SVM. At last, we compared conventional and improved algorithms by applying them on categorizing two medical data sets; the accuracy of improved algorithm achieves 100%. The result shows this improved algorithm is with significant practical advantage and value.
A General Algorithm Framework Design for Ship-Radiated Noise Target Recognition
Authors: Li Ya Nan
Published: June 2012

Ship-radiated noises are able to reflect feature of same type vessel. This paper designed a general algorithm framework for ship-radiated noise target recognition, and given the design and implementation of key modules. The algorithm framework can improve the identification accuracy, support multi-dimensional feature space , multi-classify unit and heterogeneous classifier, overcome shortcoming of identify target property of single feature and single classifier from only one aspect, so it has widely applicability. The sample assessment mechanism is introduced by the framework, which can eliminate low quality sample in order to improve the identification accuracy and efficiency of training. A simulation example is given and the results shows that the method is reasonable and effective.
New Algorithm for Predicting RNA Secondary Structure with Pseudoknots
Authors: Liu Zhen Dong , Zhu Da Ming
Published: June 2012

Pseudoknots are complicated and stable RNA structure. Based on the idea of iteratively forming stable stems, and the character that the stems in RNA molecules are relatively stable, an algorithm is presented to predict RNA secondary structure including pseudoknots, it is an improvement from the previously used algorithm ,the algorithm takes O(n3) time and O(n2) sapce , in predicting accuracy, it outperforms other known algorithm of RNA secondary structure prediction, its performance is tested with the RNA sub-sequences in PseudoBase. The experimental results indicate that the algorithm has good specificity and sensitivity.
Schedulability Analysis Algorithm of Timing Constraint Petri Nets
Authors: Li Hui Fang , Feng Fu Jian
Published: June 2012

A novel approach to the schedulability analysis is presented in this paper for timing constraint Petri nets, which have wide applications in the workflow management, software engineering, reliability engineering, and so on. The analysis can be conducted in two phases: finding firing sequences and timing constraint analysis, among which the first one is to find the transition sequences that transform the initial marking to a certain marking by using incidence matrix in the underlying Petri net, and the second one is to verify whether the reachable marking found in the first step is reachable with the timing constraints. The proposed method is able to pinpoint out non-schedulable transitions and adjust the timing constraints to make all the transitions schedulable within complex task sequences, while meeting the needs of the managers to schedule the tasks.
Research on Unknown Static Parameter Estimation Problem of State Space Models Based on Particle Filter Algorithm
Authors: Jiao Shang Bin , Qian Fu Cai , Yang Jun
Published: June 2012

A novel parameter estimation method for unknown static parameters of the state space model using particle filtering (PF) has proposed in this paper. Traditional methods enlarge state vector by treating the unknown parameter θ as a part of state vector (xk,θ) . But this may cause the degeneration of θ, when some estimates become too small to continue as a result of the non-dynamic character of parameters if θ at time k is only determined by time k-1. Compared to traditional methods, this novel method assumes that the posterior distribution of θ is given by previous observation and state vectors, z1:k and x1:k. Obtain statistics at time k by using the integration of z1:k and x1:k, and solve parameter estimation problem by updating θ recursively. Good results are obtained when this method is used in different models.
Super-High Dimension Complex Functions Optimization Using Adaptive Particle Swarm Optimizer
Authors: Zhang Ying , Liu Bo Qin , Chen Han Rong
Published: June 2012

Due to the existence of large numbers of local and global optima of super-high dimension complex functions, general Particle Swarm Optimizer (PSO) methods are slow speed on convergence and easy to be trapped in local optima. In this paper, an Adaptive Particle Swarm Optimizer(APSO) is proposed, which employ an adaptive inertia factor and dynamic changes strategy of search space and velocity in each cycle to plan large-scale space global search and refined local search as a whole according to the fitness change of swarm in optimization process of the functions, and to quicken convergence speed, avoid premature problem, economize computational expenses, and obtain global optimum. We test the proposed algorithm and compare it with other published methods on several super-high dimension complex functions, the experimental results demonstrate that this revised algorithm can rapidly converge at high quality solutions.
Application of Thiessen Polygon Algorithm in Cellular Network Simulation System
Authors: Wei Liu , Chen Hai Yan , Li Li , Fu Hai Ming , Wei Li
Published: June 2012

Cellular mobile communication system divides the service area into several adjacent cells; each cell sets up a base station. In the traditional cellular representation, we always use regular hexagon to represent the cell. In the practical engineering applications and wireless network planning simulation systems, as the programming environment is complex and diverse, using the regular hexagon to represent the cellular network has limitation. This paper used Thiessen polygon and spatial analysis method to describe the cell service area with a polygon. This method intuitively displayed the relationship between the scope of service and its place with each other in space. For the Pre-construction and later optimization of wireless network planning it has a positive role.
Plynomial Convergence of Primal-Dual Algorithms for SDLCP Based on the Monteiro-Zhang Family of Directions
Authors: Li Guang Zhou
Published: June 2012

The paper establishes the polynomial converge-nce of a new class of path-following methods for semide- finite linear complementarity problems (SDLCP) whos-se search directions belong to the class of directions introduced by Monteiro [7]. Namely, we show that the polynomial iteration complexity bounds of the well known algori-thm for linear programming, namely the short-step path-following algorithm of Kojima et al. and Monteiro and Alder, carry over to the context of SDLCP
Design of SPI Bus Communication in the Multi-Channel Data Acquisition Systems
Authors: Yang Bei , Ding Xiao Wu
Published: June 2012

the system structure of a multi-channel data acquirement system is introduced in this paper. The communication interaction circuit between the main control system and signal conditioning circuit is described. The SPI bus communication type is adopted between C8051F320 and FPGA. The speed and accuracy of datum transfer must be considered in the communication design, so the CRC calibration is used.
A Novel Color Face Segmentation Algorithm Using Multi-Feature
Authors: Wei Dong Mei , Zhou Wei Dong
Published: June 2012

In the paper, a novel and simple color face segmentation algorithm using multi-features is presented. The regions are completely segmented in the basis of the edge image which is derived from the difference between the dilated image and the eroded image. The candidate face regions are selected by the skin-color and twice shape features, and make the selected regions convex using the convex hull of the set composed by the discrete points in the region. The true face regions are determined by the Euler number of the convex regions finally. The results show that the algorithm is very simple and fast, it is robust to the expression, pose and illumination.
Module Knowledge Management in Manufacturing Process
Authors: Ma Bin , Che Jun Hua
Published: June 2012

Objective of knowledge management is to ensure that the right information is delivered to the right person just in time, in order to take the most appropriate decision. So classification is needed in knowledge management when technological knowledge is presented to designers in an automated knowledge management system. In this paper, we explore a method to classify knowledge through the module attributes in the manufacturing process. We can obtain the right knowledge quickly through the classification options so that the validity and velocity of the knowledge management are increased dramatically.
Modified N Doped TiO2 Nanotubes with Magnetic γ-Fe2O3 as Visible Light Photocatalysts
Authors: Wang Yi Zhu , Zhang Guo Liang , Zhang Feng Bao , Fan Xiao Bin
Published: June 2012

γ-Fe2O3/N-doped TiO2 nanotubes (N-TiO2 NTs) photocatalyst was successfully prepared by a wet chemical method. Visible light responses of this novel catalyst for decomposing methyl orange (MO) in air were also evaluated. It was found that the photocatalytic activity of γ-Fe2O3/N-TiO2 NTs was higher than those of N-doped TiO2 NTs, TiO2 NTs and P25. The characterizations including TEM, EDX and UV/Vis DRS revealed that iron oxide nanoparticles were decorated in/around N-TiO2 NTs and the spectral response was enhanced in visible region. Meanwhile, the catalyst recycled by external magnetic field showed that its photocatalytic efficiency did not decrease obviously.
Three Dimensional Design and Unfolding Method of Sheet Metal Parts
Authors: Sun Bo , Zhang Hui Fang
Published: June 2012

Sheet metal parts are widely used in various fields of mechanical industry. Unfolding is the first process of sheet metal processing. Due to the traditional manual way of sheet metal parts with large labor intensity and low efficiency, so the mode of production of sheet metal parts must be improved for quality and efficiency. Along with the conditions of computer aided design and production needs of the sheet metal industry, sheet metal CAD system is proposed to establish. At present, sheet metal systems are mostly based on second development of three-dimensional software to set up. So this paper is based on UG for second development to establish the sheet metal system. This system concentrates the study of method of parameter design and automatic unfolding of sheet metal parts. Parametric design and unfolding model of sheet metal parts is accomplished through the establishment of unfolding model and write control program. The principles of parametric design and second development tools of UG are specifically discussed in this paper. Unfolding model is created through the establishment of the parameters and considering plate thickness.
Numerical Simulation for Subcooled Boiling Flow Process of High Pressure Liquid
Authors: Zhou Ai Min , Jiang Yong , Chen Jian , Wang Shi Zhong
Published: June 2012

A numerical simulation has been performed for subcooled boiling process of high pressure liquid. On the basis of two-fluid model, the RPI model is used to calculate the mass transfer on the heating wall between gas-liquid two phases. The results show there is an obvious turning point on wall temperature along with flow direction，which demonstrates the onset point of subcooled boiling according to the variation of wall temperature. The fluid velocity isn’t in linear increase, which increases gradually at first and then increases sharply, which is the similar with that of void fraction. The gas-phase velocity is higher than that of liquid-phase and the difference increases gradually along with flow direction. The variation of two-phase pressure difference is similar with that of single-phase flow, which is mainly the gravity pressure difference. The study results better meet with experimental data, which verifies the accuracy of computational model.
Design of Subsoiling Mechanism Based on Self-Excited Vibration Technology
Authors: Wang Xue Yan
Published: June 2012

Many existing subsoilers in these days often suffer from problems such as insufficient tillage depth, large traction resistance, and high energy consumption. To address these problems, we conduct an analysis on, with the self-excited vibratory subsoiling technology, how to reduce resistance effectively. Based on the analysis, a detailed structural design of subsoiling equipments and experimental study is conducted, in order to increase tillage depth without a substantial addition of power, as required in modern agriculture.
Structure Design of a Novel Four Tracks Umbilical Tensioner
Authors: Wang Wen Ming , Li Yin , Zhang Shi Min , Luo Da Xin , Zhu Xiao Xiao
Published: June 2012

The umbilical tensioner is special equipment for laying pipeline offshore. Paper analyzes the research of umbilical tensioner, calculates the driving torque of the drive device, and designs the overall program of the tensioner structure based on four tracks structure, takes a mechanical check of key components in the actual operating environment. Analyzing the umbilical tensioner has a theoretical significance for the designing. The results show that the mechanical structure is reasonable.
Design and Implementation of IEEE 1588 High Precision Clock Synchronization Based on GPS Time Service
Authors: Wang Kang , Hu Yong Hui , He Zai Min , Ma Hong Jiao
Published: June 2012

In view of PTP high precise timing requirement for many application fields, GPS time service is provided with the advantages of high precision and high stabilization. The principle and timescale of PTP based on GPS are analyzed and discussed. And then a PTP time synchronization platform with GPS-based UTC time is designed and implemented, the correlative key design flowchart is described as well. Finally, the paper gives the experiment results, which show the time synchronization accuracies can reach nanosecond range.
Finite Element Simulation on Stress of Steel Sphere Shell
Authors: Song Chang Li , Ji Jing
Published: June 2012

In order to verify correctness of two-dimensional axisymmetric finite element model, this paper carries out axial symmetry analysis of the steel ball shell by ANSYS software and 2-D finite element model is established. The radial and tangential stress distribution is acquired, through comparison with the theoretical solution, both are in good agreement. So it is feasible to simulate the three-dimensional model by finite element axisymmetrical two-dimensional model.
Polyamide 6/Polyurethane/Graphite Composites Prepared by Anionic Polymerization Process. II. Friction and Wear
Authors: Deng Xin , Li Du Xin , Wang Jin , Yang Jun
Published: June 2012

Polyamide 6-polyurethane (PA6-PU) block copolymers filled with graphite particles were prepared by anionic polymerization process. The friction and wear experiments were conducted using a UMT-3 machine with the chromium steel ball sliding on surface of the composites at high sliding speeds of 500rpm, 1000rpm and 1500rpm and loads of 78.5N and 157N. With adding of graphite, coefficient of friction and wear rate values of the composites decreased firstly, and then increased. And the influence of the applied load and sliding speed on tribological properties of the composites was explored in this study. The results showed coefficient of friction and wear rate values increased with the increasing of load. Coefficient of friction decreased and wear rate values increased with increasing of sliding speed. Microstructure of wear surface of the tested composites was inspected by scanning electronic microscope(SEM) and wear mechanism of the composites was studied.
Adjustment of the Resonant Cavity and Cooling System for Laser Machine
Authors: Yang Xue Ling , Li Xiao Jing
Published: June 2012

Laser device is an important apparatus that have been widely applied in various fields. The paper classified the laser device according to the different of working material forms and discussed the main characteristics. Main constitute of laser device is working material and excitation source. Adjusting measures of the resonant cavity is quite important for laser device, the author detailed discussed the operation procedure. As to the maintenance of the cooling system, the author also discussed the manipulate steps.
Research on the Impact of Damping to the Flutter Derivatives of Steel Truss Suspension Bridge
Authors: Bai Hua , Fang Cheng , Li Yu
Published: June 2012

The flutter derivative is the important basic tache of bridge flutter stability analysis. Taking the Liujiaxia Bridge in Gansu province as the research object, this dissertation studies the impaction of damping ratio on the flutter derivatives and the critical wind speed through different series of section model vibration test. The results showed that the change of vertical bending and torsional damping ratio have no obvious regular influence on the eight flutter derivatives. But the changing of vertical bending and torsional damping ratio have the greatly impact on the critical wind speed at 0° and -3° angle of attack. When it is at 0° angle of attack ,the vertical bending damping ratio ζh is increased by 23%,the torsional damping ratio is increased by 0.63%, the flutter critical wind speed is increased by 4%;when the ζh is increased by 1.04%, the ζα is increased by 0.87% , the flutter critical wind speed is increased by 7%. When it is at -3° angle of attack, the vertical bending damping ratio remained around 0.8%, the torsional damping ratio is increased from 0.65% to 1.05%, the flutter critical wind speed is increased by 14%; when the ζα is increased from 0.65% to 2.05%, the flutter critical wind speed is increased by 24 %.When it is at +3 °angle of attack, the vertical bending and torsion damping ratio have little effect on the flutter critical wind speed.
Extraction of Molten Pool and Keyhole Characteristics during High Power Fiber Laser Welding
Authors: Zhen Ren He , Gao Xiang Dong
Published: June 2012

It is well known that weld pool geometry plays a critical role in laser welding. In this study, an IPG YLR-10000 device was used to capture a series of molten pool images during high power fiber laser welding process. Then an extraction method of the geometric characteristics of these images was developed. This method could be applied to monitor the configuration of a molten pool and keyhole which was related to welding quality. The experimental results showed that this method was a reliable inspection method for monitoring the configuration of molten pool during high power fiber laser welding.
Improvements on Throttling Pipelines Basing on Numerical Simulation
Authors: Zhu Bin , Su Yong , Zhang Hong Jun
Published: June 2012

The secondary throttling pipelines are adopted to improve their cavitation erosion resistance. With the aid of the finite element methods, under the conditions of the inlet velocity of 9 m/s and outlet pressure of zero, it has been calculated that compared to the ordinary throttling pipeline, the secondary throttling pipeline makes the maximum velocity decreased from 43.972 to 39.575 m/s, and the minimum negative pressure increased from -19.39 to -16.04 MPa. The secondary structure of the throttling pipeline has some good effect on the cavitation erosion resistance.
The Present Development Situation of Laser Ultrasonic Nondestructive Testing Signal Processing System
Authors: Xia Lie Xiang , Zhao Yan , Ma Yong Zhong , An Xiao Ning
Published: June 2012

Currently, laser ultrasonic nondestructive testing is the best application prospect of nondestructive testing methods. This paper expounds the mechanism and the qualitative analysis of the common defects of the laser ultrasonic inspection and introduces the application of matching pursuit algorithm guided wave testing technology in signal processing. This paper focuses on the laser ultrasonic detection system and analysis of the detected data using the finite element method.
Design of Automatic Detection Device for Steel Bar Surface Defects
Authors: Zhang Jian Chuan , Li Wu Bin , Lu Chang Hou
Published: June 2012

To inspect the surface quality of steel bar, we designed an automatic system including linear camera and laser. Through the comparison among kinds of cameras, we select linear CCD to our system. The laser is also chosen by us with its high luminance and performance. Through a series of computation, we select the appropriate camera lens to our device. At last, we draw the whole detection system. This device has been used well and provides a good foundation for prospective image processing.
The Integrated Mechanical Function Test System of Material and Structural Fatigue Damage
Authors: Wei Yu Lan , Li Bing , Jin Sui Ying , Chen Kai Kai
Published: June 2012

An integrated system to measure mechanical functions of material or structure is introduced. This system is able to provide more detection methods and experiment environments. And it can discover the characteristics and mechanisms of damnification and breakage in materials, considering the effects of loading and environments. Material functions were analyzed in many aspects, including loading, strain, light, sound, temperature and infrared to ensure the safety of materials and configuration of unmanned plane. Current study has laid a foundation for realizing optimal design of unmanned plane. In this paper, theory, components, and function of the system were discussed, as well as signal acquisition and analysis.
Polyamide 6/Polyurethane/Graphite Composites Prepared by Anionic Polymerization Process. I. Mechanical Properties
Authors: Deng Xin , Li Du Xin , Wang Jin , Yang Jun
Published: June 2012

Polyamide 6/polyurethane/graphite composites have been prepared by anionic polymerization process. The effect of graphite concentration on mechanical properties of the composites was investigated. The test results show that with increment of graphite content, tensile strength of the composites increases firstly, and then decreases, while notch impact strength decreases. The change of mechanical properties of the composites is attributed to the dispersion of graphite, the interfacial properties between the matrix and graphite and the nucleation effect of graphite. In addition, the relationships between loss factor(Tan δ), storage module(E’) and temperature were investigated using Dynamic Mechanical Analysis(DMTA), and the morphological characteristic of the composites were studied using Scanning Electronic Microscope (SEM).
Numerical and Experimental Study on a Honeycomb Ceramic Monolith
Authors: Mao Chong Zhi , Guo Qian Jian , He Lei
Published: June 2012

Honeycomb ceramic is the key component of the regenerative system. The numerical simulation was performed using FLUENT, a commercial computational fluid dynamics (CFD) code, to compare simulation results to the test data. The regenerative process of a honeycomb ceramic regenerator was simulated under different conditions. Experiments were carried out on honeycomb regenerators that are contained in a methane oxidation reactor. The calculated temperatures of flue gas inlet were compared with the ones measured. The tendency of the temperature is the same as the experiment.
Disease Detection and Capacity Analysis of the Double Arch Bridge
Authors: Yang Ya Xun , Yang Zhi Kui , Qiao Chao
Published: June 2012

This article take the Hainan Province Chengmai Datang bridge as an example,based on the scene test result and describes reason which its present main plant disease and forms.The union finite element analysis, compares the theoretical calculation and the dead load test result, makes the evaluation to its present supporting capacity condition.And according to the test result, will put forward the proposal to the reinforced concrete double-curvature arch bridge in the future operation management and the reinforcement.
Analysis of Rifle Recoil Based on Different Methods of Support
Authors: Wang Chang Geng , Xu Wan He , Xu Cheng
Published: June 2012

In order to analysis and study the factors influencing of measuring the rifle recoil, consider the different methods of support, based on rigid body dynamics equations and collision theory, three kinds of rifle dynamics model, which included the holder, standing and the prone position had been established. The rifle recoil curve of the different conditions had been calculated, analysis of the effects of different methods of support on the measurement of the rifle recoil.From the theoretically clarify the recoil is not a inherent properties of rifle.
Fault Detection, Isolation and Tolerance Control for Robots: A Brief Survey for Last Decade
Authors: Shi Meng Jia
Published: June 2012

The purpose of this paper is to briefly present important progresses of robots in the recent decade. A variety of fault tolerance processes are written for different robot categories, in which both minor and severe sensor and actuator failures as well as various combinations of failures are discussed. It is hopeful that these literatures may help researchers to have a glance of the fault tolerance autonomy in this area.
Neural Network Soft Sensor Model Based on Mechanism Chaotic Analysis and its Application
Authors: Zhao Yu Hong , Zhang Yun Hui , Su Ze Guang
Published: June 2012

Ball produce detection and control is an important aspect of ball mill control, however, contribute to the lack of effective and reliable ball detection means in the actual production process, so it is difficult to achieve optimal control. In this paper, secondary variable is selected with this mechanism analysis and information processing technology of choice, the establishment of the ball fast and accurate output of neural network soft sensor model can not only contribute to estimate the steady-state mill and ball mill on the dynamic process can effectively contribute to an online estimate, the soft-sensor model has a strong possibility. At the same time，it provides a reference for the soft measurement of power plant other parameters. This modeling method has portability.
An Investigation of Variable-Rate Fertilization Controlling System Based on XS-Base270 Platform
Authors: Liu Wen Yang , Su Zhong Bin , Yang Yu Shu
Published: June 2012

The research object is the variable-rate fertilization controlling system with the embedded computer as its core. On the basis of the XSBase270-S development platform and Windows CE operating system, this paper has presented the hardware structure of variable-rate fertilization controlling system, GPS data collection process, GPS data processing procedure, the flow sensor reading program and the controlling system of fertilization device, which are operated in a concurrent execution mode through the synchronic mechanism with the final purpose of achieving the variable-rate fertilization in an automatic and intelligent pattern.
Study on the Requirement Model for Battle Damage Assessment
Authors: Zhang Cheng , Shi Quan , Liu Tie Lin , Zhao Wu Kui
Published: June 2012

System of systems operation, as the main war mode in information war era, step into the war stage. Battle damage assessment (BDA) is the efficient way to realize accurate attack and enhance system of systems operation effectiveness. It is also a key point to realize the closed loop for operation command and an important composing part to form operation capability for system of systems operation. The operation requirements of BDA for system of systems operation are analyzed, based on which the requirement analyses object is established. BDA requirement models for System of systems operation are established including organization structure model, activity process model, information process model and function hierarchy model, which lay a foundation for BAD theory study and its theory system establishment.
Preparation and Properties of Si3N4 Based Composites for Broad Band Radomes
Authors: Li Ming Li , Yu Qiong , Xu Ying , Zhou Chun Jiang , Qi Zi Cheng , Lu Qing Guo
Published: June 2012

A new preparation method was developed to produce Si3N4-SiO2-Si2N2O composites for broad band radome applications. The three-dimensional cross-linked polyphenylsiloxane (PPS) was used as an organic precursor. The composites obtained through react bonding between Si and the precursor powders in the stream of N2were examined. The conversion of the PPS polymer to the ceramic was examined by TG analysis and conventional X-ray diffraction (XRD) techniques. It was found that the ceramics contained a primary Si2N2O phase, some β-Si3N4phase and a minor α-SiO2phase. Despite low density (1.7-2.0g•cm-3), the flexural strengths of the composites reaches 195Mpa at room temperature. The ceramic has excellent dielectric properties with dielectric constants as low as 3.2-5.5.
The Application of LabVIEW in Data Acquisition System of Solar Absorption Refrigerator
Authors: Wang Lin , Tan Ying Ying , Cui Xiao Long
Published: June 2012

In order to enhance the coefficient of performance of solar absorption refrigerator and analyse the system performance, it was necessary to collect the operation parameters in the system. This paper put forward to combine the technique of visual instrument and the characteristic of solar absorption refrigerator, using National Instrument’s product LabVIEW, to develop an effective data acquisition(DAQ) system. This DAQ system can realize the real-time data acquisition of temperature, water flow rate and pressure as well as data transmission, processing, and display, in addition to provide users with historic data inquire. It saved a lot of labor power and material resources so that it made measurement more convenient and fast.
Design and Implementation of Pan-Tilt Control System
Authors: Wang Yi Han , Shi Zhi Cai , Miao Hang Wai
Published: June 2012

In order to satisfy the great demands of remote, real-time and flexible image acquisition in monitoring system, a solution to pan-tilt control system in remote image monitoring system is presented, which is based on ARM Cortex-M3 micro-controller and radio communication. And then, the hardware and software design is discussed in detail. Finally, the result shows that the pan-tilt control system provides many advantages such as remote and flexible control, high precision and low cost. So it has a huge market with big potential and wide prospect.
Performance Analysis of WiMAX System Base on AMC Optimized Algorithm
Authors: Liu Li , Zheng Xiu Ping , Li Li Jun
Published: June 2012

Aimed at WiMAX-OFDM system, an optimized algorithm for AMC was proposed from the angle of channel estimation. Simulation experiments were carried on in SUI channels which were typically slow fading, and influences of the traditional AMC technology and optimized AMC algorithm on performance of system were analyzed. Results show that the optimized AMC algorithm not only improves accuracy of channel estimation, but also reduces errors between the predicted signal-to-noise ratio and the actual SNR, which makes selected modulation and coding scheme more reasonable. Finally, the WiMAX system can obtain performance optimization.
Research on Coach Control System in Voyage Training Simulator Based on GIS
Authors: Yuan Jun , Wu Ying , Xiao Jian Bo
Published: June 2012

Considering the actual requirement of voyage training simulation system, engineering method and component technology have been adopted on coach console system. The system functions, structures are introduced. The key technologies including map operation based on ArcGIS, communication between message driven coach control and visual simulation system, eagle eye technology have been discussed in this paper. Experiment indicates that the system which is practicable and can meet the requirements of real time, and shows a great value in popularization.
Implementation of Intelligent Laboratory Management System Terminal
Authors: LIU Zhi Gang
Published: June 2012

In this paper, intelligent laboratory management system terminal are implemented based on embedded ARM system. The system is composed of ARM applications terminal and network server accessing to Internet, which provides intelligent access control, fire alarm, automatic attendance, video surveillance and voice intercom functions. And also the approval of intelligent online booking, real-time information bulletin features can be achieved. For laboratory personnel management, the system provides a good solution of identification and appointment approval, real-time monitoring, information management background. This paper describes functions of system terminals, focuses on terminal software solutions and key technologies. The terminal is implemented on the S3C2440 processor device and applied to practical engineering, proves the correctness and reliability of the program.
The Application of Expert System in Automation Testing
Authors: Wang Lei
Published: June 2012

On the basis of designing testing technological process, this paper introduces expert system into automation testing frame. Through the analysis of testing system state, automation testing expert system generates high-efficient testing cases, leaving automation testing process without manual intervention, thus solve the problem that different testing engineer abilities bringing about different testing qualities. Practice has proved that improved testing frame can high-efficiently test system defects, improving software testing speed and efficiency thereby, moreover guarantee the testing quality.
A Memory Architecture Design for High-Performance Cloud Computing
Authors: Luo Li Qun , He Si Jin
Published: June 2012

The advent of cloud is drastically changing the High Performance Computing (HPC) application scenarios. Current virtual machine-based IaaS architectures are not designed for HPC applications. This paper presents a new cloud oriented storage system by constructing a large scale memory grid in a distributed environment in order to support low latency data access of HPC applications. This Cloud Memory model is built through the implementation of a private virtual file system (PVFS) upon virtual operating system (OS) that allows HPC applications to access data in such a way that Cloud Memory can access local disks in the same fashion.
Computer Simulation for Medical Ultrasound C-Mode Imaging Based on 2d Array
Authors: Hua Shao Yan , Ming Yu Chi , Ding Ming Yue
Published: June 2012

C-mode imaging is one of the ultrasound imaging modalities. Compared with other modalities, e.g. A-mode, B-mode, M-mode, and Doppler, C-mode is mainly developed and used in industry testing. The potential of C-mode imaging for medical application has not been fully explored. In this paper, we design one 2-d plane array transducer through using the point spread function (PSF), and apply the 2d array transducer for C-mode imaging. The simulation results show that the generated C-mode images can display the anatomic structure and the pathological changes on the biological tissue.
Research of Chinese Multi-Pattern Fuzzy Matching Method for SMS Spam Monitoring
Authors: Qin Jian , Yin Shi Qun
Published: June 2012

In this paper, it is analyzed the content and achieving mechanism of WM algorithm on account of frequently asked questions during the monitoring and filtering of Short Message Service(SMS) spam, and brought forward a kind of Chinese message with multi- patterns fuzzy matching method to improve WM algorithm to apply to Chinese spam message filtering. The method firstly does pretreatment of key words and fuzzification of monitor for message on account of expressive diversity of Chinese message, and then realizes initial matching by improving WM algorithm. Because the preliminary result is not the final one, it needs further fuzzily match for the result. It does particular introduction of the method and the model of monitor and filtration for Chinese SMS spam in the paper. The method’s correctness and performing efficiency also has been done experimental analysis, test and comparison experiment with former system that had not been done pretreatment. Experimental results show the validity of the improving algorithms. The method is testing further during the practice.
A Joint Method Based on Wavelet and Curvelet Transform for Image Denoising
Authors: Wang Hua , Cao Jian Zhong , Tang Li Nao , Zhou Zuo Feng
Published: June 2012

Wavelet transform is widely used and has good effect on image denoising. Wavelet transform has unique advantages in dealing with the smooth area of image but is not so perfect in high frequency areas such as the edges. However, curvelet transform can supply this gap when dealing with the high frequency areas because of the characteristic of anisotropy. In this paper, we proposed a new method which is based on the combination of wavelet transform and curvelet transform. Firstly, we detected the edges of the noisy-image using wavelet transform. Based on the edges we divided the image into two parts: the smoothness and the edges. Then, we used different transform methods to dispose different areas of the image, wavelet threshold denoising is used in smoothness while FDCT denoising is used in edges. Experimental results showed that we could get better visual effect and higher PSNR, which indicated that the proposed method is better than using wavelet transform or curvelet transform respectively.
Applying Web Mining Techniques for Constructing Webometrics Ranking early Warning System
Authors: Hsieh Shu Ming , Lo Ssu An , Hsu Chiun Chieh , Chen Da Ren
Published: June 2012

The management of university web sites is becoming more critical than before due to the rapid growth of the population dependent on the world wide web as the most important (if not the only) information source. A university can spread its research outcomes and education achievements through its web site, and consequently gain visibility and influence from the web population. Webometrics Ranking of World Universities (WR) proposed by Centre for Scientific Information and Documentation (CINDOC-CSIC), which ranks the university web sites, has obtained much attention recently. The rankings of WR are well recognized as an important index for universities willing to promote themselves by the internet technology. In this paper, we proposed WRES as an early warning system for Webometrics Rankings. WRES gathers the WR indices from the WWW automatically in flexible periods, and provides useful information in real time for the managers of university web sites. If the WR ranking of an institution is below the expected position according to their academic performance, university authorities should reconsider their web policy, by promoting substantial increases of the volume and quality of their electronic publications. Besides, the web site manages may adopt effective approaches to promote their WR rankings according to the hints given by WRES.
Blind CFA Interpolation Detection Based on the Entropy
Authors: Pan Xiao Zhong , Xie Jian
Published: June 2012

Blind CFA interpolation detection，which identifies the demosaicing method used in digital camera by analyzing output images, provides many efficient tools for digital image forensics．In this paper, we proposes an approach of blind CFA interpolation detection based on the entropy of the correlative coefficients．By solving the pixel matrix equation, the CFA interpolation coefficients are calculated and the entropy of the coefficients are obtained, and they are further fed to SVM classifier to identify forgery. The experimental results show a high accuracy on blind CFA interpolation detection．Compared with existing ones，the proposed method in this paper indicates a better performance on the robnstness especially against lossy JPEG compression.
A New Method for Content-Based Image Retrieval via Subsets of Key Contours Fragments
Authors: Tan Chuan Qi , Chen Yu Feng , Li Feng Xia , Yang Zhi Zhong
Published: June 2012

In this paper, a novel method is proposed for solving an open problem of shape matching in content-based image retrieval. In order to prepare for matching two images, our novel method uses an improved segment method to get more accurate contours. And then we find a new way to extract the key contour fragments, so that a shape can be presented as many key contour fragments in this way. It is an effective way to do analysis in image contour. In addition, a similar measure method is proposed to get the correlation rate of two images via subsets of key contour fragments. Finally, experiment results show that our new method can get more robustness than existing methods and achieve a superior matching effect in the standard shape databases MPEG-7.
Image Denoising New Method Based on Fractional Partial Differential Equation
Authors: Jiang Wei , Wang Zheng Xia
Published: June 2012

Current total variation method excels at denoising and keeping the characteristics of image edges. However, its ability to retain texture details of smoothing region of image is poor. By combining fractional-order differential theory with total variation method, a new image denoising method is proposed. The new method, while effectively inheriting these advantages, uses the fractional-order differential amplitude-frequency and effectively. Simulation results which we have got show that the new method, on the one hand, can better suppress noise, keep the characteristics of image edges, and retain more texture details than integer-order partial differential methods. On the other hand, the method, above mentioned, is more effective and practical on image denoising than results of PSNR.
Design and Implementation of Scalable Autonomous Centralized Fault-Tolerant Scheme for Satellite System
Authors: Zhou Hao , Tang Yu Hua , Jiang Jing Fei
Published: June 2012

Depending on application requirements, the number of processing nodes in parallel satellite system varies. Currently, fault-tolerant design for satellite system often aims to solve specific problems, lacking in universality. This paper presents a scalable autonomous centralized fault-tolerant (SACFt) architecture. Based on it, functional module framework of each system node and autonomous fault-tolerant strategy are designed. This scheme is insensitive to scale change of the processing nodes. It can ensure autonomous fault tolerance and control node parallelism on demand flexibly at the same time, balancing system reliability, scalability, autonomy, real-time feature and many other factors. The validity and real-time feature of the proposed scheme has been verified and evaluated on the prototype system.
The Multi-Level Metadata Indexing in Mass Storage System
Authors: Niu De Jiao , Zhan Yong Zhao , Cai Tao
Published: June 2012

Metadata query plays an important role in mass storage system. Efficient indexing algorithm can reduce the time and space which greatly determine the efficiency of mass storage system. Typically, temporal and spatial consuming is immense and volatile in the existing metadata management algorithms. In this paper, a novel metadata indexing algorithm is presented. Metadata query algorithm is based on two-level indexing strategy. The metadata is classified into two categories, that are active metadata and non-active metadata. The Bloom Filter is used to generate binary string for active metadata, and the B-tree is used to establish index of each active partition. While, the suitable hash function is selected for each non-active metadata partition. The results show that the multi-level metadata indexing algorithm can reduce the temporal and spatial costs of metadata query.
Designing Family Ontology with the Protégé OWL Plugin
Authors: Jiang Li Ping
Published: June 2012

The growing interest in the Semantic Web and the Web Ontology Language (OWL) will reveal the potential of Description Logics in industrial projects. The rich semantics of OWL provide powerful reasoning capabilities that help build, maintain and query domain models for many purposes. However, before OWL can unfold its full potential, user-friendly tools with a scalable architecture are required. In this paper, we design and edit the family ontology using Protégé OWL Plugin, which is developed by Stanford University.
A Layered Trusted Computing Platform Module with Unified Deployment on Server
Authors: Shen Ping Ping , Yang Jing Bo , Gu Cai Dong , Jiang Yu
Published: June 2012

This paper discusses the trusted computing model which is based on existing computer network. The present trusted computing platform has to make big changes on personal pc hardware system in order to realize the trusted computing platform module on pc mainboard or hardware. To solve this, here presents a layered trusted computing platform module, which replaces the original trusted computing platform module with implemented modules on server. The prototype model ensures the trust measurement being implemented on any logical layers of the trusted platform with making a complete trust chain from the beginning of the boot stage of the client operating system. By creating a trusted computer platform with all the computers in the system, real trustworthiness in the entire local area network can be realized.
The Application of Chaotic Encryption Model in the Network Identity Authentication
Authors: Pang Chun Jiang
Published: June 2012

This paper analyzes a sort of color still image algorithm based on the Logistic map sorting, and verifies the confidentiality. Further, this algorithm will be applied to the authentication module in network identity authentication system. A new, safe and effective certification system is realized based on the network identity card, and the authority authentication is provided for users requiring identity identification on the network. Nowadays, cryptography and network security is a hot topic for communication and computer industry. Currently, encryption technique in the information security mainly contains conventional private key encryption system and public key encryption system, the former has low computation overhead, but its encryption strength is not high; the latter, although has high encryption strength, its computation cost is huge. Therefore, it has profound theoretical significance and wide application prospects to research a sort of information encryption algorithms and information security software system with security, good confidentiality and high calculation speed. Chaos phenomenon is a determinacy process which is similar to random, and often appears in nonlinear dynamical system, this process is neither periodic nor convergent, and is sensitively dependent on initial value [1-3]. These basic features of chaotic system can just meet the basic requirements of secret communication and cryptology. The researches of Secret communication, information encryption and information hiding technology are based on chaos theory, and have become one of popular and frontier topics developed by the cross fields of international nonlinear science and information science. Also it is an international, high-tech researched new field, cryptography based on chaos theory has recently become very popular science [2]. In our paper, chaotic model images encryption technology is applied to Network identity authentication system to prevent rampant e-commerce fraud.
Detection of Pulmonary Nodules in CT Scanned Images Based on Region Growing with Optimization Parameters
Authors: Li Yong , Miao Zhuang , Chen Bo
Published: June 2012

We present a more efficient computer-aided diagnosis algorithm to detect pulmonary nodules automatically in CT (Computerized Tomography) scanned images based on region growing with optimization parameters: initial seed points and constraint condition. The former are chosen by 3D (three-dimension) PCA (principal component analysis), and the later is designed by distance map and watershed algorithms. The technique was tested against more than 200 CT images of 10 typical cases from Jilin Tumor Hospital. The results confirm the validity of technique as well as enhanced performance.