bluuebunny/crossref_metadata_2025 huggingface dataset:
Monte Carlo Simulation Approach with Ordinal Optimization Based STATCOM Installation Strategy for Transmission System Loading Margin Enhancement
Authors: Chang Ya Chin , Chen Sung Ling , Hung Chih Teng
Published: April 2014

The power system loading margin enhancement problem to determine an optimal Static Synchronous Compensator (STATCOM) installation can be formulated as a mixed discrete-continuous nonlinear optimization problem (MDCP). In the paper, long-term efficiency of STATCOM installation to enhance transmission system loading margin (LM) is evaluated using a Monte Carlo Simulation (MCS) procedure with an Ordinal Optimization (OO) based STATCOM installation strategy to solve the MDCP. First under each N-1 contingency with bigger risk index (RI) value, the crude model is used to estimate the rough solution for each candidate, and then the exact method is used to a smaller set to determine the good enough solutions. Obtained from the union of the respective good enough solutions for all considered contingencies, the scheme with the smallest number of STATCOM units enabling the network to provide required average LM is recommended.
The Study of Virtual Leg Problems on Electromechanical Vehicle Platform with Four-Point Support
Authors: Jiao Ruo Bing , Chen Chong , Wang Fu Ping
Published: April 2014

In this paper, the cause of electromechanical vehicle platform with four-point support generated virtual leg was analyzed, and a new approach had been proposed to eliminate virtual leg. Not only does this approach simplify complex logic drive control system of vehicle platform with four-point or multi-point in leveling process, but also it shortens the leveling time and reduces system cost.
Mechanical Research with Development of Automatic Handshaking Signal Module for Cross Connecting Cabinet Remote Monitoring Control
Authors: Chen Gin Shan , Chen Zhi Yuan
Published: April 2014

Since the urgent demands for high-speed broadband Internet, facilities originally installed in a unit-central office end are moved to the places close to the users in order to enhance the broadband and overcome the high-frequency attenuation of copper cables, such as cross connecting cabinets (CCC) on streets, and the lines between a unit-central office and CCC are changed to optical fiber cables. Network transmission technology has currently become the generation of optical fiber. To actually promote fiber to the home, the value-added services of high-speed Internet access, VoIP, and multimedia service for users are currently the highlighted telecommunications technology and businesses. Nevertheless, copper cables have been used for a long period of time that it would be costly to completely replace copper cables. Gradually replacing old cables with new ones is considered as the optimal strategy. Without constructing optical fiber lines at different places or completely removing copper cables, Automatic Handshaking Signal Module (AHSM) for a CCC developed in this study is considered economical and simple. It could monitor the signal handshaking through remote control and make structural and functional changes of existing copper-cable cross connecting cabinets for the low-cost and high-efficiency seamless technology transfer.
Applied-Information Technology with Trojan Horse Detection Method Based on C5.0 Decision Tree
Authors: Li Yang , Liang Ye , Liang Jing Zhang
Published: April 2014

This paper discusses the Trojan horse detection methods by analysis on Portable Executable File Format through which we can get much useful information. In order to deal with the information extracted from Portable Executable file, our methods constructed a decision tree based on C5.0 decision tree algorithm. Our approach can be divided into two steps. Firstly, we extracted some features from Portable Executable file by a portable executable attribute filter. Secondly, we handled the features extracted and then construct a classifier to identify the Trojan horse. The original in this paper is the application of a more effective algorithm C5.0 to construct the decision tree.
The Design of an Android-Based Platform for Mechanics Principle Learning and Applying
Authors: Ma Deng Yun , Fang Fan Tao , Chen Ding Fang
Published: April 2014

Nowadays,study with smartphone has become common practice. By aiming at the problems existing in traditional method of learning mechanics principle,which basically show up as the students suffer fear and trouble when they realize the fact that theory and practice, as well as Concrete And Abstract Thinking are linked closely, this paper introduces designing and developing a Android-based platform for mechanics principle learning and applying. the platform integrates the idea,"happy Cognition" into the Android application design, in which a user-friendly interface and humanized menu will be included. in addition, the neural network algorithm and Servers building realized by some analysis and evaluations make the platform a great benefit to students' study. the platform combine study and entertainment,to help the learners by bringing them Systemic and dynamic cognition to mechanics principle, generating their creativity when designing common structure. So the platform will lead to good market prospect.
Research on Lloyd-Max Quantizer with Two-Stage Otsu’s Method
Authors: Liao Ping Sung , Lee Chein Hua
Published: April 2014

Otsu’s method is often used in image segmentation applications such as defect detections, medical image diagnosis and object shape recognitions. However it is very time-consuming for multilevel segmentation. Lloyd-Max quantizer is a popular and efficient data compressor. Fundamentally, Otsu’s method and Lloyd-Max quantizer are equivalent to maximum a posteriori probability estimate. Applying them on multilevel image segmentation, we can find their segmented results over an image are very approximate, but Otsu’s method running in exhaustive search consumes more processing time than Lloyd-Max quantizer with iterative characteristics does. Thus, Lloyd-Max quantizer is strongly recommended as the fast and first-stage agent for Otsu’s method to find the optimal threshold values for image segmentation.
Research on Aviation Material with Aviation Mishap Prediction Model Based on Neural Network and its BP Algorithm
Authors: Gan Xu Sheng , Li Hua Ping , Duanmu Jing Shun
Published: April 2014

In order to reduce the appearance of aviation material mishap, it is important to predict the aviation material mishap for safety management and decision-making body. Considering the advantage of neural network modeling, an aviation material mishap prediction based on neural network and its BP algorithm model is proposed. An actual example on fight mishap 10000-Hour-Rate data of USAF illustrates that the proposed prediction model has an accurate prediction.
Mechanical Design with Applied Technology for Development and Research of Integrated Design Platform for Fan
Authors: Wang Wei , Chen Ai Ping , Zhang Rong
Published: April 2014

An integration design platform was developed successfully. Visual Basic (VB) was used to select model quickly, and make the secondary development on SolidWorks based on database of fan. The functions (selection model, parametric-modeling and automatic building engineering-drawing, etc.) were integrated in the platform. The platform consisted of three parameterized modeling modules, which were centrifugal fan, axial fan and centrifugal Compressor. An example of centrifugal fan is given to show that the realizing process of integration design platform. With the using of this platform, the results show that the integration design platform increases the design efficiency and makes the design easy.
Applied Technology with Robust Optimization of Airport Capacity Dynamic System
Authors: Yang Shang Wen , Tong Ming
Published: April 2014

To optimize airport dynamic capacity system, the method of robust optimization was applied. An applied technology in robust optimization with the aim to minimize the maximum deviation from expected delayed flights was proposed. The airport capacity curve constraint, fix capacity constraint and airport capacity scenario constraint were included. To test how well the applied technology would be in real world, a numerical test was performed based on the data of a Chinese international airport. For the applied technology in robust optimization of airport dynamic capacity system, the volume of expected delayed flights is 2.44% larger than the average value of typical model, and the objective value is 23.61% less than the average value of typical model. Test results show that, compared with typical model, the applied technology proposed achieves the robustness and could effectively reduce the deviation of flight delay in different capacity scenarios with less loss of air traffic control efficiency.
Research on Manufacturing Design with Training Model of Animation Design and Production
Authors: Ye Jun Yao , Liu Ke Ning , Wang Ying Lian
Published: April 2014

With the vigorous development of Chinese animation industry, animation industry has risen as one of our country's strategic industries. In order to satisfy the strong demand for animation talent, we should adjust current training model. For the problems of the training model of animation design and production, combined with our teaching experience, we put forward an evolutionary training model, which is linking "order style" cultivation with innovation studio.
Research on Cement Manufacturing with Application of Simulation System in Thermotechnical Course Teaching
Authors: Wang Han Li
Published: April 2014

Simulation system of cement production process can provide background information on production process and hints to problem solving, urge students to analyze problems and handle fault by themselves, and discuss fault handling results with teachers. With its application in Teaching of Cement Thermal Technology Equipment, teachers can set fault simulation to train students’abilities of parsing problem and actual operation, which is an effective teaching method.
Applied Technology and Application of Printing Materials in Note Methods of Interpretation
Authors: Tian Xian Zhi
Published: April 2014

] In interpretation, linguistic transmitted is often through many different carriers. As for the different carriers, applied technology and printing materials are regarded as very important ways for improving linguistic transmitting abilities. Although many different modes have been tried and some efficiency can be seen during this time. During the course of interpretation,note method is very special and useful for the interpretation. At the same time, the proper application of printing materials is also analyzed for improving the efficiency of interpretation, in the course, the author finds out that each material has its own special characteristics and proper application methods. Thus,it is the special characteristics of printing materials that make applied technology and printing materials play more important roles in interpretation.
[key words] applied technology; useful modes; printing materials; interpretation; note methods
The Way of Obtain C4H6O+ Macro Ion by C7H12O+ Excited State
Authors: Chen Hong Bin , Zhu Ying , Wu Jie
Published: April 2014

Our theoretical study aims to analyze the Way of Obtain C4H6O+ macro ion by C7H12O+ Excited State and gives out a result with proved and directed significance for the corresponding experiments. Using the CIS(Configuration Interaction with Single Substitute) method, we calculated the frequency of cycloheptanone ion excited state. It is the parent ion 1C-7C, 4C-5C fracture, generates C4H6O+ pieces. It mainly through the fifth excited state occur the dissociation process.
Analysis of Micro Inclusions in Q195 Steel
Authors: Wang Shuo Ming , Wang Yan , Wang Ruo Si
Published: April 2014

Aimed at the Q195 steel production process in a steel mill, using tracer analysis make system analysis to the process of production and microscopic inclusions content. In the steady casting average T[O] is 117.22ppm, [N] is 22.6ppm, micro inclusions average content is 11.96/mm2, while the average T[O] and [N] in transient casting billet is 161.93ppm and 30.49ppm, micro inclusions averaged content is 16.068/mm2. The total oxygen content in steel on the high side, should strengthen deoxidization. Argon stirring strength is too large, inclusions in casting slab containing tracer element, illustrate the ladle slag, tundish slag, mould protection slag are forming pollution on billet, should reduce the influence of transient casting on the steel quality.
The Research on Three-Dimensional Theoretical Model of Residual Stress on Cutting Surface
Authors: Gao Guo Fu , Wang Ming Jie
Published: April 2014

Two kinds of three-dimensional model of residual stress were discussed based on the three dimensional distribution characteristics of residual stress on machined surface, considering comprehensively the strain along the X, Y, Z three directions, to improve the two dimensional model of residual stress established by DL McDowell without considering the Z direction of the strain. As to the characteristics of milling force, strains of any point in the substrate surface along three directions can be calculated based on the elastic-plastic mechanics theory. With the improved models, both the distribution of residual stress on milled surface and the distribution of residual stress in subsurface layer can be obtained. By means of the examples of numerical calculation, the analytical result and simulation result are analyzed and compared. The improved model accorded better with the actual residual stress distribution on milled surface than original model.
Study of Lateral Tuyere Layout Impact on the Inner Velocity and Temperature Field of Dry Slag Discharge Machine
Authors: Lu Hong Bo , Li Jian Hua , Si Ying Ying
Published: April 2014

Numerical simulation of the internal flow and heat transfer was conducted in dry slag discharge machine of the boiler in this paper. In the case of constant total air volume, the lateral tuyere layout impact on the inner velocity and ash temperature field was analyzed. The results show that the airflow disturbance of the tuyeres adopting stagger arrangement in the box would be more strengthened than aligned arrangement, and which could reduce high temperature area of the ash layer and protect the security of the steel belt.
Research on the Transmission Characteristics and Mechanical Mechanics of Dual Meshing Points in Involute-Circular Arc Tooth Gear
Authors: Xiao Jun , Deng Xu Lei , He Jia Ning , Ma Wu Xing , Li Jin Song , Li Yan
Published: April 2014

The principle of gear engagement and the relevant knowledge of gear geometry were used to introduce the dual meshing points involute-circular arc tooth gear in detail. At the same time, use the derived equation of the contact line and the tooth profile equation to describe the gear meshing process. Derive to this gear formula of coincidence degree calculate, in order to improve the transmission theory of the gear. Combine the gear contact line equation, equation of the tooth profile and transmission analysis, studies the meshing performance and serve as a theoretical basis for the gear design and application.
Simulation and Analysis about Different Pressure Angle in Involute Gears Based on Neural Network
Authors: Xiao Jun , Deng Xu Lei , He Jia Ning , Ma Wu Xing , Li Yan , Li Jin Song
Published: April 2014

This article introduced neural network, discusses the neural networks model and its learning process. Using the MATLAB environment research and analysis the involute gear undercutting relationship, which under different pressure angles. In the number of teeth or modulus has been scheduled environment apply the nonlinear mapping characteristics of neural networks to involute gear undercutting do a more accurate simulation. This provides a theoretical basis for different pressure angle involute gear in gear transmission design.
The Design and Research of Automatic Control Feeding System
Authors: Wang Xi Juan , Zhang Jun Jie , Feng Jing Xiao , Meng Yang
Published: April 2014

This article introduces automatic control feeding system, including the specific performance of the system, the overall design structure. The system uses parallel structure, a rice separator, a dish separator and bowl conveyor and two conveyor belts. The paper selects the programmable controller (PLC) as control unit to control the corresponding food supply lines parallel movement according to the signal from the selected dishes. Selected dishes, connected to the switchboard and send a signal to PLC, transmission the amount of data of meal card. Users could use the interface to choose food type and quantity, PLC could complete the task. The paper explains the details how the mechanic part and PLC control process.
A New Method of Parameters Determined in PCNN
Authors: He Shui Ming , Wang Dian Hong
Published: April 2014

The aim of this paper is to research the image recognition system and its applications, which is based on combining the traditional BP neural networks and the third-generation pulse coupled neural network (PCNN).The process is by extracting the image's time and entropy sequences, then through the fast Fourier transform, and finally as inputs of the pattern classification. In order to test the stability of the system, we make some varies by rotating, tension and compressing the original image, meanwhile, combined with the statistics of the entropy information to determine the time delay parameter of the pcnn, the recognition results is satisfactory.
A Promotion of a Color Morphological Filter
Authors: He Shui Ming
Published: April 2014

Mathematical morphology can be seen as a special digital image processing method and theory, which has been widely used in various fields. In this paper, the mathematical morphology is applied to the color image processing. In thespace of color image, I have simply expounded the theories and properties of color morphological changs, and defined its morphological operators. According to the application of omni-directional and multi-angle structuring elements composite morphological filter in gray image, I put forward a kind of color morphological filter with omni-directional and multi-angle structuring elements composite. This algorithm has retained its advantages in gray image, however, remaining some drawbacks. Through the optimization of results based on this algorithm, we finally get the relatively ideal denoising effects.
The Blind Watermarking Method Simulation Research Based on Wavelet Tree Quantization
Authors: Sun Fang , Li Peng
Published: April 2014

This article studies image copyright protection algorithm based on watermark. Aimed at the defect that watermark loading algorithm easily leads to the loss of original image information, it proposes a kind of quantization based on wavelet tree structure so that in the watermark extraction process, it can restore the original intact image without original image or watermark information. First, it makes use of level-four wavelet transform to construct tree wavelet coefficient waveband diagram. Then it discretizes and insets watermark information into different waveband nodes of tree structure according to coefficient variation maximum principle. By designing self-adaption threshold value during extracting process, it can restrict some common watermarking loss better, such as smoothing, mean value filtering and gaussian noise. The experiment result proves that this method can make watermark image the visually same as the original image and watermark can still be extracted effectively after preprocessing.
Mixed Expression Recognition & Analysis Based on Compressed Sense and Subjection Degree
Authors: Cai Jun , Li Yang Yang , Zhang Yi
Published: April 2014

Mixed expression is more in line with people’s daily perfromance than basic expression.This paper proposed a facial expression recognition method that recognizes and analyze mixed expressions. In this method, Gabor phase and local binary patterns were combined into GPLBP model to obtain the expression features and the model contained good robustness of light. Compressed sense and subjection degree function were adopted to identify the ingredients of main basic expressions in the mixed expression the ratio of each kind of basic expression. Experimental results of comparison respectively to Gabor-SVM and AAM-SVM verified that the proposed method could not only identify and analyze the mixed expression effectively but also recognize the basic expression precisely.
Study on Wavelet De-Noising of High Frequency Current Signal for Rotor Position Self-Sensing of PMSM
Authors: Zhou Xiaomin , Ma Xiang Hua , Qi Xin
Published: April 2014

Self-sensing control of permanent magnet synchronous motor has been a hot research topic of motor control technology, which has the advantages of low cost and high reliability. The use of a high-frequency carrier signal superimposed on the fundamental excitation of PMSM has established itself in recent years as a viable means of eliminating position sensors in ac drives for applications. In the carrier signal injection methods, the rotor position can be estimated by using the carrier signal current resulting from the interaction between the carrier signal voltage and the spatial saliency. The existing sampling error and random noise of high frequency current signal were uncertain to the rotor position self-sensing, that may affect the rotor position self-sensing precision. This paper describes a new wavelet de-noising method of the high-frequency current signal, improving the de-noising results significantly.
Global Color Composition for Curved Screen Display System
Authors: Lin Zhi Jie , Lu Dong Ming
Published: April 2014

We present a novel approach called Global Color Composition (GCC) to improve the visual effect of large image show on curved screen multi-projector display system. Instead of traditional approach only blend overlapped area, our algorithm utilize the global gradient-domain information to get better effect, and as an optimizing of the algorithm to reduced time and memory, we utilize the patches border pixels to construct the passion equation. The solver of this passion equation is result image we desired, which can be solving on parallel GPU threads. Experiment results are given to illustrate the effect of our approach.
Object Update-Based Mean Shift Tracing Algorithm Combined with LBP
Authors: Liu Mou Zhong , Sun Min , Wang Ya Fen
Published: April 2014

This paper proposed a novel solution to track human face obscured largely in an image on the basis of Mean Shift Tracing Algorithm (MSTA). The improved approach aims to update the target model in real-time during the whole tracking process to avoid target losing. Local Binary Pattern (LBP) theory is chosen to improve the original MSTA here. The experimental result shows that our new solution has a better performance in target tracking under situations like face rotation and occlusion as well as in fast acquisition when faces reappear on the screen.
Application of Kalman Filtering and Smoothing for Airborne Gravimetry
Authors: Zheng Wei , Zhang Gui Bin , Li Rui
Published: April 2014

Due to the interference of noise, filtering technology is applied to achieve gravity anomaly for airborne gravimetry. Kalman filtering and smoothing are discussed and implemented for data processing of airborne gravimetry in this paper. Firstly, the algorithms of Kalman filtering and smoothing are introduced. Then, the system model for solving the gravity anomaly is established which is based on the dynamic equation and the hardware design equations. Finally, the result of Kalman filtering and smoothing would be compared with digital FIR low pass filter, and it is proved that Kalman filter and smoother could obtain more accurate result than FIR low pass filter as that the solving error of Kalman filter and smoother is improved within 1 mGal compared with the theory standard obtained by GT-1A software.
Environmental Friendly Sulphoaluminate Cement Based Rapid Hardening and Repair Materials
Authors: Lu Meng Jie , Ba Ming Fang , Man Dan Yi , Ma Si Yuan , Yang Jie , Shao Sheng Zhe
Published: April 2014

In order to save the costs of the rapid hardening and repair sulphoaluminate cement and improve its working performance, the effects of slag, fly ash, silica fume in different contents and different adding ways on the initial setting time and working performance of sulphoaluminate cement are studied. The results show that the initial setting time of single-doped slag and fly ash both meet the requirements of repair materials, but silica fume significantly cuts the cement’s initial setting time short, which does not meet the construction conditions for rapid hardening and repair. Ultimately it is determined that the mechanical properties of sulphoaluminate cement are the best when slag and fly ash are compound added by the content of 30% at 4:1 mass ratio and simultaneously the initial setting time meets the conditions for rapid hardening and repair.
Joint Multiple-Access Channel Effective Order and CIR Estimation Algorithm for Multi-User OFDM/SDMA System
Authors: Li Shuang Zhi , Zhang Zhe , Mu Xiao Min , Zhang Jian Kang
Published: April 2014

In this paper, a novel joint estimation of channel effective order and channel impulse response (CIR) is presented for multiuser orthogonal frequency division multiplexing/space-division multiple-access (OFDM/SDMA) systems. By exploiting Akaike’s Information Criterion (AIC) as the fitness function to search the optimal order, the proposed scheme performs the channel effective order and CIR estimation in a parallel way based on differential evolution (DE) algorithm. Simulation results demonstrate that the proposed scheme is capable of attaining a better mean square error performance than the fixed channel order scheme, and improving the performance of time-domain maximum likelihood (ML) channel estimator.
NIR and Upconversion Luminescence Properties of Nd3+ Doped in Gd2O3-CaO-SiO2-B2O3 Glass System
Authors: Insiripong S. , Kaewjeang S. , Maghanemi U. , Kim H.J. , Chanthima N. , Kaewkhao J.
Published: April 2014

In this work, properties of Nd3+ in Gd2O3-CaO-SiO2-B2O3 glass systems with composition 25Gd2O3-10CaO-10SiO2-(55-x)B2O3-xNd2O3 where x = 0.0, 0.5, 1.0, 1.5, 2.0 and 2.5 mol% were investigated. The optical absorption spectra show peaks at 4F3/2 (877 nm) , 4F5/2+2H9/2 (802 nm), 4F7/2+4S3/2 (743 nm), 4F9/2 (682 nm), 2H11/2 (627 nm), 2G7/2 +4G5/2 (582 nm), 4G7/2 +2K13/2 (527 nm), 4G11/2 (481 nm), 2P1/2 (427 nm) and 2L15/2 + 4D1/2 + 1I11/2+ 4D5/2+ 4D3/2 (355 nm) reflecting the Nd3+ ions in glass matrices. The densities were increased with increasing of Nd2O3 concentration. This indicates the increase of the molecular weight by the replacement of B2O3 with a heavier Nd2O3 oxide in the glass. The upconversion luminescence spectra show bands at 393 nm for all Nd2O3 concentration and the strongest intensity from 2.5 % mol of Nd2O3 was obtained. For NIR luminescence, the intensity of Nd3+ emission spectra increases with increasing concentrations of Nd3+ up to 1.5 mol% and beyond 1.5 mol% the concentration quenching is observed.
Multi-Level Indicators Reduction Approach for Complex Index System
Authors: Jia Dong Yao , Liu Xiao Hui , Feng Shun Tian , Zhou Kai Yu
Published: April 2014

The reduction of the index system at home and abroad mainly starts from the basic statistics and soft computing theory, but these methods are not always effective for complex index system. In this paper, a new multi-level indicators reduction model based on complex index system has been proposed through in-depth analysis of the multi-level environment and growth factors which affecting crop growth. First, exception handling model was introduced to determine indicators abnormalities or not in this method, then make a preliminary reduction in indicators of index layer from the point of multi-level statistical; Second, through clustering reduction model, and a further perfection of the index system is discussed; Finally, the optimal reduction index system of crop growth evaluation is proposed. The experiment results show that it can get the optimal reduction index system of crop growth evaluation by this method, and the optimal index system can cover 90% of the index system.
TCP Communications Research Based on Embedded WinCE and LabVIEW
Authors: Wang Xiao Hu , Li Yan Song , Liu Jun
Published: April 2014

For the embedded devices Equipped with ARM processors and WinCE operating system,This paper proposes the use of LabVIEW programming software Touch Panel module for network communication programming.This paper describes the use of PB (Platform Builder) tools for WinCE operating system custom-tailoring process.Compared with traditional text-based programming,LabVIEW graphical programming be shorter development cycle, the program interface more image-attracting.Take network communication as an example,the paper demonstrate the use of LabVIEW software written network communication program for embedded devices equipped with WinCE operating system,and achieved between embedded devices and PC data communication via TCP protocol,and get the expected results, provide a fast and reliable method for the next research.
Studying the Impact of 32-Bits AS Numbers on Constructing Internet AS Graphs
Authors: Masoud Mohammad Z. , Jannoud Ismael A.
Published: April 2014

Modeling Internet structure as an autonomous system (AS) graph is considered one of the most common methods to study the Internet. AS-graph is constructed by utilizing ASes from the Internet. The AS number was 16-bit address. It reduced the size of ASes scope in one hand and made the AS graph small and easy to be produced and modeled. However, the number of ASes has exceeded the 16-bits limits. The 32-bit addressing has emerged as a method to tackle this problem. This increasing in the AS number scope converted the AS graph into a massive graph with unpredicted number of ASes. In this paper, we attempt to study the impact of 32-bits addresses on the AS graph. Graph parameters have been utilized to measure this impact. To this end, we have constructed two AS-graphs, a 16-bits-AS graph and a full AS graph. We have compared these graphs according to cluster coefficient, betweenness centrality, node degree and average shortest path. Our results demonstrated that the 32-bits ASes are popular. Moreover, these ASes have an effect on reducing the value of the global cluster coefficient and increasing the average shortest path. We observed that the number of vertexes that connect 16-bits and 32-bits ASes is small and requires more inferring.
A Design for Fault-Tolerant Communication Middleware Based on Time-Triggered
Authors: Jin Juan , Gu Qing Fan
Published: April 2014

Against to the unsustainable problems of health diagnosis, fault location and fault tolerance mechanisms that existing in the current avionics applications, we proposed a fault-tolerant communication middleware which is based on time-triggered in this paper. This middleware is designed to provide a support platform for applications of the real-time based on communication middleware. From the communication middleware level and also combined with time-triggered mechanism and fault-tolerant strategy, it diagnoses the general faults first, and then routes them to the appropriate fault mechanism to process it. So the middleware completely separates fault-tolerant process from the application software functions.
Investigation into the Differences Chemical Properties of Laser Sintering Polymer Powders Using Fourier Transform Infrared Spectroscopy
Authors: Way Yusoff , Puwanto Hadi , Farizahani Farizahani , Pham P.T.
Published: April 2014

Selective Laser Sintering (SLS) or Laser Sintering (LS) allows functional parts to be produced in a wide range of powdered materials using a dedicated machine, and is thus gaining popularity within the field of Rapid Prototyping (RP). One of the advantages of employing LS is that the loose powder of the building chamber can be recycled. The properties of polymer powder significantly influence the melt viscosity and sintering mechanism during Laser Sintering (LS) processes which results in a good surface finish. The objective of this research is to investigate the chemical composition of fresh polymer materials used in Laser Sintering. There are seven virgin SLS materials which are PA2200, GF3200, Alumide, PrimeCast, PrimePart, Duraflex and CastForm. Fourier Transform Infrared Spectroscopy (FTIR) was used to analyze the chemical composition of the materials by using infrared radiation and absorbed frequency. The spectra show that similar functional groups were found in the materials apart from PrimePart and Duraflex. Obtained data from this analysis could be used to investigate on how the fresh and recycled powder materials with different chemical properties would affect the part surface finish.
Design of Theme Crawler for Web Forum
Authors: Qiu Zhao , Dai Ceng Jun , Liu Tao
Published: April 2014

Network crawler as web information extraction tools, it can download web pages from internet for the engine. The implementation strategy and operating efficiency of crawling program have a direct influence on results of subsequent work. The paper aimed at the shortcomings of ordinary crawler, puts forward a practical and efficient precise crawler theme method for the BBS, the method for the BBS characteristics, attempts in the web page parsing, theme correlation analysis and the crawling strategy, using the template configuration, analyze and crawl on the article. The method is better than the general crawler in the performance, accuracy and comprehensive rate.
Design and Implementation of the Network Electronic Identity Management System
Authors: Ni Li Shun , Chen Bing
Published: April 2014

This paper presents a quickly locate the query methods in the face of huge amounts of data. The method by analyzing the data relationship, split the database, the formation of cross-database quickly Hash positioning table, and by analyzing the query cost to build double weighted graph and weight table. Each query is given based on the node weight table fast cross-database query path, and quickly locate the target from the cross-database positioning Hash table Hash calculation, in order to achieve fast positioning method.
On the Construction of Efficient Private Signature Scheme
Authors: Kang Bao Yuan , Xu Hao , Niu Yong Zhen
Published: April 2014

Private signature is a signature which provides signature privacy and restricted transference. Using the private scheme a user can sign a message in such a way that only a designated verifier can verify the signature. In some cases, the signer may want to preserve the privacy forever, which means that the initial verifier should not be able to convince anyone else of the fact that the signer signed the message. In some other cases, the signer may want to give the initial verifier the possibility to transfer his conviction to someone else, if desired. In this paper we first review the private signatures proposed by Javier Herranz, and point its drawback. Then we propose efficient private signature by combining a secure signature scheme and a non-interactive one-way key agreement.
Joint Linear Precoding and Power Allocation for MU-MIMO CR Systems with Imperfect CSI
Authors: Wang Wei , Lu Yan Hui , Li Duan Yang , Yang Shou Yi
Published: April 2014

This paper proposes a joint linear precoding and power allocation design scheme for multiuser multiple-input multiple-out (MU-MIMO) cognitive radio (CR) systems, where secondary users share the same spectrum with one primary user. The interference power constraint required by the primary user and the multiuser interference generated by secondary users impose negative influence on each secondary user. As a result, it is difficult for secondary users to achieve the ideal information rate. In order to solve the above problem, we respectively adopt Channel Inversion (CI) and Block Diagonalization (BD) for precoding matrices which are set at the transmitter of each secondary user, and then make the system reach a steady state by power allocation. In fact, perfect CSI cannot exist in wireless systems. Therefore, it’s necessary to consider imperfect CSI. Simulation results show BD gains a higher rate for secondary users, but imperfect CSI causes less loss to CI.
Partial Interference Alignment Schemes for the K-User MIMO Interference Channel
Authors: Lv Xue Lei , Zhang Guo Mei , Li Guo Bing , Lv Gang Ming , Zhang Chao
Published: April 2014

Partial interference alignment (PIA) strategies for the K-user interference channel are considered. Two schemes are proposed to align the partial interference for the downlink interference channel in the case of K>3. In the first scheme, strong interferences are limited as much as possible by aligning the two strongest interferers into a same subspace at the receiver. While the second scheme is to design its precoding matrix (or vector) by selecting the precoder pair which maximizes the chordal distance between designed signal subspace and interference signal subspace in the set of pecoding matrices (or vectors) at each transmitter. Simulation results show that compared with the existing schemes which don’t optimize the precoder, such as Fixed-PIA, the proposed schemes can improve the sum rates significantly by selecting IA forms in multi-input multi-output (MIMO) systems.
The Design of Android-Based Video-on-Demand System and its Implementation
Authors: Liu Xun
Published: April 2014

As the third Generation mobile communication technology develops quickly, all sorts of smartphone development platform are constantly launched, including Google's Android mobile phone, and the promising future of Android cannot be ignored. Allow for the situation, the design and implementation of the Video on Demand System based on Android has realistic significance. Our article mainly states the development of Android Video on Demand application, JAVA service application and network communication. Summarize the principle of VOD system and draw flow-process diagram of it. We develop VOD application using JAVA language on Android which is based on the flow-process diagram successfully. Finally, debugging the programming on a Google's Android mobile phone, finding the bugs existing in the program and modify the mistakes to improve the software. My paper concluded the framework of VOD system on Android and verified it’s availability by realizing it on a Android cellphone to provide a model for future VOD system.
A Novel Coverage Off-Duty Eligibility Rule in Wireless Sensor Networks
Authors: Fu Yin Fei , Xiong Qing Xu
Published: April 2014

Based on the EECP off-duty eligibility rule which is improvement of the popular CCP, this paper proposes a new off-duty rule. The new rule with much lower time complexity can overcome the misjudgment issue of ECCP, and be suitable for large high densely-deployed WSNs.
Study on WSN Localization Algorithm and Simulation Model for Intelligent Transportation System
Authors: Li Zheng Feng , Gao Lian Zhou
Published: April 2014

This paper conducts research on the algorithm to improve the location of Wireless Sensor Network (WSN) in Intelligent Transportation System (ITS). The localization algorithm introduced an improved RSSI vehicle localization algorithm based on multi-path effect and Gaussian white noise. The localization results under different values of Gaussian white noise and different density of beacon nodes are analyzes, and Kalman filtering algorithm is introduced to reduce the influence of signal noise. Finally, a simulation model of ITS is developed to test the algorithm based on mixed noise and Kalman filtering algorithm, which is used to simulate the localization of real vehicles. The simulation shows the algorithm has effect to improve location accuracy and to application
Improved Clipping Technique for PAPR Reduction in OFDM
Authors: Anjum M.R. , Shaheen M.A. , Manzoor Farhan , Dida Mussa A.
Published: April 2014

Multicarrier modulation technique also known as Orthogonal Frequency Division Multiplexing (OFDM) is considered to be the most rapidly growing technique for 4th Generation wireless communication system. Due to its high speed data rate and its ability of multipath fading channel robustness. OFDM becomes an attractive technique and it is widely adopted in many wireless communications system. OFDM signal carries its major drawback of high Peak to Average Power Ratio (PAPR) problem. Out of band radiation and in band distortion produced due to its high PAPR. Mobile phone communication suffer severe drawback during its amplification. When OFDM employed a non linear Power Amplifier (PA), it produces the fluctuation in amplitude of OFDM signal. This paper discusses the method to overcome PAPR in terms of its performance by using improved clipping technique for PAPR reduction. This method is easy to implement and reduces the amount of PAPR by clipping the peak of the maximum power signal. We present an improved method for PARR reduction for reducing peak magnitude of OFDM signal. This scheme simultaneously minimizes the peak magnitude of PAPR in OFDM signal.
An Item-Level Access Control Framework for Inter-System Security in the Internet of Things
Authors: Xie Yi , Wang Dong
Published: April 2014

The IOT(Internet of Things) is thriving to connect everything on our planet. With the maturity of Radio Frequency Identification technology, companies are adopting RFID technology into their legacy systems. However, systems of different companies are facing obstacles in establishing mutual trust to be partners of the IOT. This paper proposes an item-level access control framework for inter-system security in the IOT, promising to help solve the issue and drive the development of the IOT a step forward.
Solving Bottleneck Problem by Transmission Power Control under Various Compression Assumptions for Wireless Sensor Networks
Authors: Cheng Rei Heng , Huang Chi Ming
Published: April 2014

In a wireless sensor network, sensor nodes located near the sink will have to bear more communication responsibilities in forwarding the data generated by the nodes located far from the sink. The nodes that are away from the sink communicate with the sink via the nodes that are nearby the sink. Thus the nodes nearby the sink will run out of battery power very soon and create bottleneck for communication. Some researches tried to balance the loading of sensors by adjusting the power range of sensors. However, simply reducing the power range does not always reduce the loading of sensors in the bottleneck zone. In this paper, both of the impacts of the transmission power range and compression gain on energy consumption of a wireless network are analyzed. Some simulation results are given to show the correctness of analysis results.
Numerical Analysis on High Speed Liquid-Solid Impact of 17-4PH Material
Authors: Li Ming , Zhao Peng Fei , Wang Guang Hui , Liu Jing
Published: April 2014

In this paper, anaxis-symmetry mode is set up to simulate the high speed liquid-solid impact of 17-4ph material, which is widely used inwet steam turbine bladesof the nuclear power units. The initial speed of the droplet with the diameter of 0.3mm is 400m/s. The deformation of the solid and the stress distribution variation with time are obtained via numerical method. And the variation of the pressure inside the droplet and solid target has also been analyzed in detail. In this case, the maximum pressure in the vertical direction of the solid is 1099MPa, and the maximum deformation distance of the plateis 140nm. The results provide useful supplement and reference to the high-speed liquid-solid impact theory.
An Empirical Research on E-Marketplace Basic Functions
Authors: An Ran , Guo Jing Zhi
Published: April 2014

This research is to show that functions are the indispensable elements for e-marketplace construction, and that basic functions in particular are able to meet the demand for highly interoperable and cost-effective e-marketplaces. Specifically, this research relies heavily on historical literature event methodology by studying existing electronic marketplaces through thousands of research papers, ranging among 1,221 articles published in journals and conferences over the period of 1986-2012. Based on the basic functions generated from the function published year and the function counted quantity, this research eventually shows that e-marketplace designers, facilitators, buyers, and sellers will be able to construct and select a suitable e-marketplace automatically for their diverse purposes.
A Level-Dependence Model and it’s Application in SFMEA
Authors: Wu Yu Mei , Wu Li Jin , Sun Lei
Published: April 2014

SFMEA is an important method of improving software reliability. To solve the problem that there are no clear levels or variable clues in Detailed-level SFMEA, focusing on software architecture, the Detailed-level SFMEA method based on Level-dependence model is proposed. The method as follows is advanced:Level-dependence model is constructed to make the software variables clues visualized; variables to be analyzed are selected combined with the model’s features; failure modes are identified based on the model’s attributes and common failure mode library; the affect’s propagation and causes’ analysis are converted to the reachability problem of the nodes.
A Research of HTN-Based Anytime Planning Algorithm on FPS Games
Authors: Dong Jie Liang
Published: April 2014

With the development of game industry, the requirements of game AI are also increasing. Recently a planning formalism called HTN (Hierarchical Task Network) was used to design AI behaviors. In this paper we describe how to implement an anytime planner based on HTN to handle a dynamic environment, which is the key feature of computer game worlds. This planner allows agent to interrupt its sequence of actions at anytime based on the changes of environment meanwhile return a valid replacement plan. We use Unreal Tournament 2004 which is a famous first-person shooter game as the platform and test our anytime planner.
Surface Quality of Actual Structure with Concrete Using Expansive Additives
Authors: Yashwanth Hanumantharayappa , Mochida Yasuhide
Published: April 2014

The performances of the concrete structure with expansive additives are studied in this research. These expansive additives have helped in reducing the generation of cracks and have showed improved durability. This research evaluates the performance of actual structures through reviews of existing techniques with air permeability, surface water absorption, measurement of distortion of the actual structure and building surveys. The upshot of shrinkage, the significance of restraint and service life in reinforcement is observed in actual structure using concrete with expansive additives. The methods was found that it has a relatively dense surface quality and durability of the concrete structure is said to have endurance level of the planning period.
The Fuzzy Evaluation of Compatibility between PC-HPWR Agent and Cement
Authors: Wang Fan , Zheng Shan Suo , Wang Xiao Fei
Published: April 2014

To evaluate the compatibility between polycarboxylates high performance water-reducing admixture and cement, the initial Marsh-time or fluidity(T), loss rate of fluidity as time(FL), saturation point(P), setting time(ST) and bleeding rate(R) are considered simultaneously. Making the comparisons of these parameters between tested concrete and reference cement, the corresponding membership functions are established, and using the fuzzy mathematical evaluation method based on the program Matlab, breaking the limitation of reference cement, the more comprehensive and accurate evaluation can be made.