bluuebunny/crossref_metadata_2025 huggingface dataset:
Research on Dynamic Job Shop Scheduling Problem Base on Hybrid Genetic Algorithm
Authors: Yan Cun Liang , Shi Wei Feng , Zou Ze Ming
Published: September 2012

In real production processing, job shop scheduling problem (JSP) is often express as dynamic scheduling problem. In this article a hybrid genetic algorithm and handling strategies are used for real job shop scheduling problem. It gives the scheduling result with the appropriate handling strategies to the stochastic events such as equipment breakdown and urgent orders. The data of Shanghai Shen Mo Die & Mold Manufacturing Co., Ltd (ShenMo) is used for the application of dynamic scheduling simulation, and the results of which show that the proposed method can satisfactorily solve the stochastic events of scheduling.
Study on Algorithm of Same Judgment on Nonlinear Boolean Functions’ Logical Expressions Structure
Authors: Li Hong Yan
Published: September 2012

The nonlinear Boolean function (NBF) is an indispensable tool in design and analysis of cryptosystem. Algorithm of the same judgment on two NBF logical expressions has wide needs in Boolean function application. However, the algorithm is more complicated. In this article, an algorithm of the same judgment on two NBF logical expressions based on ROBDD is put forward. Combined with advantages of the array and hash table, ROBDD expression node data structure Unique Table of NBF is designed. Its time complexity of same judgment is O(6(max(id)-2)).
The Method of the Global Positioning Based on RSSI
Authors: Tian Ming Ming , Zhu Zong Jiu
Published: September 2012

A novel Global Positioning Algorithm for Workers in Underground Coal Mine Based on RSSI (Received Signal Strength Indication) is proposed and implemented. The innovation of the algorithm is the RSSI optimization and GIS auxiliary positioning. The RSSI optimization can reduces the error caused when the blind code is too closed to the reference node, and GIS auxiliary positioning is to solve the problem that the number of the reference codes in the communication radius of blind code is less than three. Experimental Results Indicate that Global positioning algorithm has the average vertical positioning error less than 4m, the horizontal error less than 1/2 roadway width, and the positioning cycle less than 1s, with better positioning and tracking performance, and expands the coverage of the network of underground positioning.
A Novel User Selection Algorithm for Multiuser MIMO-OFDMA System with Zero-Forcing Beamforming
Authors: Li Xiao Wu
Published: September 2012

As an important pre-coding method in MIMO- OFDMA system, zero-forcing beamforming (ZFBF) can eliminate co-channel interference (CCI) between users, and generate a series of parallel spatial subchannel without interference. In this paper, we propose a novel ZFBF-based user scheduling algorithm for multi-user downlink MIMO-OFDMA systems. The algorithm can satisfy the rate requirement of each user, choose the right user set in each subcarrier and minimize the total transmit power. Simulation results show that the proposed algorithm does outperform the non-adaptive algorithm and SUS-algorithm.
Study of Airport Ground Services Scheduling Problem in Airline Industry
Authors: Yin Kai , Yin Gang , Xu Hong Tao
Published: September 2012

In this paper, we lay primary emphasis on the scheduling problem of airport ground service in airline industry, aiming at searching for scientific scheduling method of airport resources and providing a basic operational design scheme to optimize and solve the schedule problem of airport ground service operation intelligently. According to ECS rules, operation structure is optimized and the defect of ECS rules was remedied in this paper.
The SQL Injection Vulnerability Detection of the Web Application
Authors: Zhu You Chan , Liang Hui Li
Published: September 2012

the SQL injection is one of the common security vulnerabilities of the Web application. This paper studies how to find out the possible SQL injection vulnerabilities. The scheme this paper put forward is the technology of black-box test. The main steps are that firstly construct specific user input in the test period of the Web application system, and inject it into the application system, then get the vulnerability detection report according to the analysis of the test logs.
Three-Dimensional Mesh Model Watermarking Algorithm
Authors: Li Xin , Tian Yi Ping
Published: September 2012

Watermark information is embedded in three-dimensional mesh model through three-dimensional watermarking algorithm for effective copyright protection. The widely use of three-dimensional grid model attracts more attention on the copyright protection. The digital watermark algorithm with the NURBS model based on the wavelet transform aims to get the virtual grayscale images using the control point coordinate. Then we can embed the watermark into the virtual gray image watermark. It can change the three-dimensional models into two-dimensional images. And this algorithm can enhance the operability and simplicity of the watermark embedding. Experiments show that the proposed algorithm is easy to implement, simple in principle, and the extracted watermark is clearly visible, moreover, the model does not need to be directly modified, so it has good robustness. Watermarked model does not change in the visual, it has good invisibility.
Parallel Programming Methods Based on the Multi-Core DSP TMS320C6670
Authors: Li Zhi Yong , Ye Zhen Liang , Liu Chen Tao
Published: September 2012

While the frame rate is higher and the image size is larger, sequence images processing is harder. Good real-time can be ensured by the multi-core DSP in the embedded image processing system. TMS320C6670 which is the multi-core DSP designed by TI corporation is selected as study object. Based on hardware characteristics analyzed, the Data Flow model is adopted as the multi-core processing model. Two data processing subtasks assigning methods are analyzed by comparing their advantages and disadvantages on the system idle time and memory requirements. The data processing subtask assigning flow is design for a serial sequence images processing example. An inter-core data transfer flow design idea is put forward. Using methods and occasion of two kinds of data buffer establishing techniques is studied and defined. An inter-core notification flow design idea is put forward. Using methods and occasion of three notification methods based on the interrupt controller and the Semaphore2 module is studied and defined.
Wavelet Frequency Domain Constant Modulus Blind Equalization Algorithm Based on Fractional Lower Order Statistics
Authors: Guo Jun , Guo Ye Cai , Chen Qu , Zhao Yi Bo
Published: September 2012

In order to improve the performance of constant modulus algorithm(CMA) in the noise which obeys α-stable distribution, wavelet frequency domain constant modulus blind equalization algorithm based on fractional lower order statistics(WT-FLOSFCMA) is proposed. This proposed algorithm uses fractional lower order statistics to restrain α-stable noise, and its computational loads can be greatly reduced by using FFT technique and the overlapping retention law. In the proposed algorithm, according to the minimum dispersion coefficient criterion, the CMA is optimized, orthogonal wavelet transform is used to improve the convergence rate. The computer simulations in underwater acoustic channels show that the proposed algorithm outperforms than CMA, orthogonal wavelet transform constant modulus algorithm(WT-CMA),and frequency domain blind equalization algorithm based on fractional lower order statistics(FLOSFCMA) in suppressing with inter-symbol interfere, improving convergence rate, and reducing mean square error.
The Study on Cloud Computing Resource Allocation Method
Authors: Wang Ling Yan , Liu Ai Min
Published: September 2012

Resource allocation and scheduling problems in the field of cloud computing can be classified into two major groups. The first one is in the area of MapReduce task scheduling. The default scheduler is the FIFO one. Two other schedulers that are available as plug-in for Hadoop: Fair scheduler and Capacity scheduler. We presented recent research in this area to enhance performance or to better suit a specific application. MapReduce scheduling research involves introducing alternative schedulers, or proposing enhancements for existing schedulers such as streaming and input format specification. The second problem is the provisioning of virtual machines and processes to the physical machines and its different resources. We presented the major cloud hypervisors available today. We described the different methods used to solve the resource allocation problem including optimization, simulation, distributed multi-agent systems and SoA. Finally, we presented the related topic of connecting clouds which uses similar resource provisioning methods. The above two scheduling problems are often mixed up, yet they are related. For example, MapReduce benchmarks can be used to evaluate VM provisioning methods. Enhancing the solution to one problem can affect the other. Similar methods can be used in solving both problems, such as optimization methods. Cloud computing is a platform that hosts applications and services for businesses and users to accesses computing as a service. In this paper, we identify two scheduling and resource allocation problems in cloud computing.
Monkey King Immune Evolutionary Algorithm
Authors: Li Zuo Yong , Zang Lei , Wang Jia Yang
Published: September 2012

Monkey-King genetic algorithm has the shortages of the lower searching ability in the local area and further in the whole area at monkey-king point in spite of the advantages of the simple principle and easy calculation. Monkey-king point was optimized iteratively by using immune evolutionary algorithm. This method overcomes the premature convergence because of the optimal searching in the out as well as in of the monkey-king point. At the same time, with the lapse of iteration, the algorithm closes in the whole of optimal solution with the higher precision because of the gradual strengthening of local searching ability. Calculation and comparison with several methods, such as monkey-king genetic algorithm, improved monkey-king genetic algorithm and common climbing operator genetic algorithm et al, has made. The results show that the monkey-king immune evolutionary algorithm has the optimal searching ability and the stability all the better.
A New Algorithm for the Fuzziness of Alarms in Network Faults Diagnosis
Authors: Liu Pan , Li Xing Ming , Wu Jian
Published: September 2012

The alarm correlation analysis based on fuzzy association rules mining is the popular and cutting-edge field of the network fault diagnosis research. In the application environment of alarms in communication networks, a new algorithm of the fuzziness of alarms which is called FKMA (Fuzzy K-Means of Alarms algorithm) is proposed .During the process of fuzziness, there are two methods of sorting the center. Simulations are carried out to the comparison of the two methods. The fuzziness of alarms is effectively realized. And fuzzy association rules mining are achieved. The advantages and efficiency of FKMA are demonstrated by experiments.
Voice Activity Detection Based on Nonlinear Processing Techniques
Authors: Zhan Wen Lian , Wang Jing Fang
Published: September 2012

Hilbert-Huang transform is developed in recent years dealing with nonlinear, non-stationary signal analysis of the complete local time-frequency method, recurrence plot method is a recursive nonlinear dynamic behavior of time series method of reconstruction. In this paper, Hilbert-Huang Transform empirical mode decomposition (EMD) and the recurrence plot (RP) method, a new voice activity detection algorithm. Firstly, through the speech and noise based on the empirical mode decomposition and multi-scale features of the different intrinsic mode function (IMF) on a time scale filtering and nonlinear dynamic behavior of the recurrence plot method, quantitative Recursive analysis of statistical uncertainty for endpoint detection. Simulation results show that the method has a strong non-steady-state dynamic analysis capabilities, in low SNR environment more accurately than the traditional method to extract the start and end point of the speech signal, robustness.
A Combined Fair Resource Scheduling and Adaptive Modulation Scheme for Clustered OFDMA Systems
Authors: Huang Lin , Chen Nian Sheng , Hu Bai Yan
Published: September 2012

Orthogonal frequency division multiple access (OFDMA) is a promising technique for achieving high downlink capacities in next generation wireless communication system. An OFDM system has the advantage that multiple users can be scheduled at the same time in a frequency-selective channel. Proportional fair resource scheduling algorithm can guarantee the fairness among multiple users. Compared to the conventional fixed modulation, link adaptation modulation can select the most appropriate modulation scheme on each sub-carrier according to the current link qualify, this can be used to enhance system throughput. However, the overhead cost of feeding back channel state and modulation mode information of every sub-carrier for every user is very high. Cluster feedback scheme can greatly reduce the feedback overhead. In this paper, based on cluster feedback, an adaptive modulation with proportional fair scheduling algorithm is proposed. The analysis and simulation result verify that the introduced scheme is effective in improving system throughput and has fairness among users.
Damage Detection of Pipes Based on PVDF
Authors: Zhang Yu Xiang , Zhou Yun , Xu Fu Hou , Li Hua Cheng
Published: September 2012

To detect the pipes, this paper introduces the electro-mechanical impedance (EMI) method into online monitoring for the pipes. The pipes model with a Polyvinylidene Fluoride (PVDF) bonded on it is built. The finite element method is employed to analyze the electro-mechanical impedance of the PVDF, the conductance curves of PVDF are obtained with different damaging phase of the pipes, the root-mean-square deviation (RMSD) is used to assess the damage extent. The result indicates that EMI as a new detection method is effective in identifying the existence and severity of cracks in pipes. As the corrosion area increases, the difference of conductance curves becomes more obvious and the RMSD becomes larger.
Internet of Things and Automation Research
Authors: Yang Qi
Published: September 2012

The Internet of Things technology has brought the worldwide wave of the information industry, has increasingly become the focus of attention in all areas of the world. In this paper, the concept of Internet of Things, the basic structure, its key technology, simply talking about the linkages between the Internet of Things and Automation as well as the automation industry, and cited a number of related applications of the Internet of Things technology.
Bluetooth Hands Free System for Fixed Telephone Research
Authors: Shang Qing Hua , Liu Ping
Published: September 2012

Wireless technology has walked into the People's Daily life, Bluetooth technology comes to the fore in so many wireless technologies with its low power consumption, low cost and other characteristics. Bluetooth technology is used widely, we can see it in mobile phones or in our cars, it seems that Bluetooth technology has penetrated into every aspect of our lives. Even so, the combination of Bluetooth technology and fixed telephone still has a very big development space. If the stability of the fixed telephone combined with the flexible of Bluetooth technology, it will give the life of people a lot of convenience. This paper will introduces the Bluetooth hands free system for fixed telephone, it is such a product that it will make Bluetooth technology and common fixed phone combined, and make it a reality that people can use common Bluetooth headset to answer or call a fixed telephone.
Bluetooth Ad Hoc Network Technology
Authors: Liu Xiao Pei , Fei Teng , Zhu Cheng
Published: September 2012

With the growing maturity of the Bluetooth technology, Bluetooth technology to the utility and safety are getting higher and higher. As open-standard of short distance wireless technology of communications. Bluetooth has much virtue of low-power consumption, low-cost and strong anti-interference. It is convenient and economical when used by mobile devices in Small scope. This thesis summaries the background of the thesis, also simply illustrates Ad Hoc network and the application of Bluetooth in Ad Hoc network. At the beginning of this article, the main research task and arrangement of chapters are introduced. Introduce Bluetooth technology and architecture. Based on the introduction of the system module of Bluetooth personal area network (PAN), implementation of the application module of PAN is presented. The implementations of software and hardware platform of Bluetooth ad hoc are also presented. An application of Bluetooth ad hoc---wireless communication positioning system based on Bluetooth, GPRS and GSM is designed and realized. Finally, Summary of the main technology and project, summarize the relevant work of the thesis.
Anti-Jamming Technology Performance Analysis of SATCOM Systems
Authors: Zeng Xiang Feng , Yang Yu Hong
Published: September 2012

Numerous technologies have been adopted in modern SATCOM to ensure communica-tion smooth. Among them, frequency hopping and onboard processing technology will be researched mainly in this paper. First, models of frequency hopping system and onboard processing system were built by Simulink. Then, the effect of coupling phenomenon analyzed on the theoretical. At last, Anti-jamming capability studied after simulating with different jamming. All above will provide convincing support to further research on SATCOM technologies; also, will guide the development of satellite communication.
Doppler Estimation, Synchronization with HFM Signals for Underwater Acoustic Communications
Authors: Zhang Lan , Xu Xiao Mei , Feng Wei , Chen You Gan
Published: September 2012

This paper presents the application of the hyperbolic frequency modulated (HFM) signal to acoustic propagation in order to improve the performance of underwater acoustic (UWA) communications. Due to the large delay spread caused by multipath propagation and the severe Doppler Effect of the channel, we propose the using of double HFM signals as preambles for Doppler estimation, frame synchronization in UWA communications. A theoretical analysis about Doppler-invariability of HFM signals was provided firstly, then some numerical simulations about Doppler estimation were implemented, and experiments on testing performance of double-HFM preambles for frame synchronization in the pool were carried out as well. The simulation and experimental results show that using double-HFM signals as preambles has the capability to take an explicit Doppler estimation and retiming for frame synchronization, demonstrating that it has a good prospect in underwater acoustic communication system, especially for moving platforms.
Evaluation on the Armed Police Force Transport Safety Ensuring Effectiveness Based on the AHP-FUZZY
Authors: Han Wen Tao , Qi Kang Wei
Published: September 2012

In order to enhances the battle efficiency and transport support ability, accomplish the central task of “perform duties, counterterrorism, handle thunderbolt”, it has a very important significance to strengthen the safety administration of vehicle and prevent traffic accident. the paper from a safety administration point of view, set up a transport safety ensuring effectiveness evaluation indices system for the Armed Police Force(APF),and calculated the weight of the indices using AHP method. Finally, Based on the theories of Fuzzy comprehensive evaluation theory, the comprehensive evaluation model on transport safety ensuring effectiveness of APF is established.
The Principle and Characteristic of Telecommunication Network Interconnection
Authors: Li Nan
Published: September 2012

As a typical network industry, the inherent characteristic in technology and economy of telecommunication determine that its effective competition requires equal interconnection. This article analyzes the principle and network economy characteristics of telecommunication network interconnection, expecting provides the basis for promoting rapid and healthy development of the telecommunications industry.
The Study on Cloud Storage Data Management Method Based on Minimum Access Cost for Internet of Things
Authors: Song Xiao Hong
Published: September 2012

According to the characteristics of data access in Internet of things, we put forward a replicate distribution method of minimum cost which considers the number and type of replicate in cloud storage. By this method, the replicates will be distributed to storage servers with minimum total cost from several data service points. This method is fundamental research of low cost distribution for replicates in cloud storage based on data access load.
Design of Mine Gas Remote Monitoring System Based on TinyOS
Authors: Gao Li Li , Cui Li Zhen , Yu Quan
Published: September 2012

Monitoring system design of mine gas Monitoring System were designed according to the traditional lacked of the real-time and early warning functions and so on problems. A multi-hop sensor network based on TinyOS is designed. The system is based on hierarchical network architecture. The software design principle based on TinyOS is introduced, which can realize the multi-hop communication. A simple Ant colony algorithm is designed in this sensor network to improve the network lifetime. According to simulation results and Test Research, this system can efficiently realize the multi-hop data communication and reliable.
EDMC: An Energy-Efficient Distributed Multi-Hop Clustering Approach for Wireless Sensor Networks
Authors: Li Zhu Guo , Wang Bing Wen , Feng Li Zhu
Published: September 2012

The past few years have witnessed increasing focus on the potential applications of wireless sensor networks. Sensors in these networks are expected to be remotely dispersed in large number and to operate autonomously and unattended. Clustering is a widely used technique that can enhance scalability and decrease energy consumption over sensor networks. We present an energy-efficient distributed multi-hop clustering approach for sensor networks, which combined multi-hop transmission with clustering method, aiming to balance the energy dissipation and prolong the whole network lifetime. Simulations showed that the protocol proposed worked nearly 100% more efficient compared with LEACH and HEED.
Research on the Derived Error for Mechanical Processing
Authors: Xu Cun Shan
Published: September 2012

To the super long shaft workpieces, because of the particularity of itself, mechanical processing process is hard to control, along with the process system derived error (factors error) can be produced, how to solve the derived error in super long shaft processing production, the author has conducted the qualitative analysis on three types of derived error, and put forward the corresponding countermeasures.
A Novel Degradation Scheme Based on User Satisfaction in CDMA Systems
Authors: Wang Yong , Ge Xin , Xu Yu Bin , Ma Lin
Published: September 2012

Within the past few years, a great deal of attention has been drawn towards the CDMA system. The state of a CDMA system has two cases: saturation and instauration. After the system is saturated, no more users are allowed to access to CDMA systems with traditional method. In order to enhance the maximum number of users and the all users’ satisfaction while guaranteeing users’ quality of service (QoS) –SINR (signal-to-interference–plus-noise) requirement, this paper presents a degradation scheme based on user satisfaction in CDMA systems. Simulation results show that the proposed scheme can be allowed more users to access to and increase the total users’ satisfaction, leading to higher system capacity and resource utilization.
Research on Coded Cooperative Strategy in Satellite Communications
Authors: Kong Bo , Dai Wei Heng , Jie Xiao , Dong Fei Hong
Published: September 2012

Aiming at the satellite mobile communication, the cooperative communication technology is applied to the forward downlink in this paper, and one scheme with two satellites based on the coded cooperative which used the Alamouti space time block code is presented. Simulation results show the coded cooperative strategy can obtain better performance than the traditional uncoded systems, which is lower than the MIMO system with two transmit antennas and one receive antenna based on the Alamouti code, but the power of the terminal was decreased. It has the advantage in communication range and low complex mobile terminal, which has a certain application prospects in satellite mobile communications in the future.
Improved Amplify-and-Forward Cooperative Scheme for Satellite Communication Systems
Authors: Jia Min , Gu Xue Mai , Wu Qun
Published: September 2012

The technology of Amplify-and-forward cooperative diversity is popular for the cooperative communication system. And it can be applied when a communication terminal can’t communicate with other communication terminal directly. Moreover, this kind of scheme has been studied by the researchers for the application of terrestrial wireless communication systems. The conventional system presents that the power are equally distributed among all nodes. However, this algorithm can not be applied to satellites communication systems directly. Therefore, an improved Amplify-and-Forward cooperative scheme is presented in this paper, and the simulation results show that it can obtain the larger system capacity and better BER performance.
Design of an UDP Protocol Stack IP for Internet Communication
Authors: Li Jian Hua , Wang Guo Cheng , Zhang Meng , Chen Yi
Published: September 2012

This paper explains the importance of Ethernet communication in practical application, and designs an Ethernet communication soft-core based on FPGA. The soft-core proposed in this paper can implement data transmission and reception based on UDP Protocol stack. It can receive and unpack UDP protocol packet and extract the data out of the packet; it can also pack and send UDP protocol packet in preset length. The whole application is modeled in Verilog HDL. Experimental results show that the maximum frequency of proposed design is 100Mb/s, which is sufficient for most applications.
The Performance of 8PSK Modulation with Continuous Phase in the Satellite Channel
Authors: Ju Ying Jue , Zhu Jiang , Fu Yong Ming , Wang En Gang , Yuan Wei Qiang , Guo Xiao Bin
Published: September 2012

Satellite channel is a typical band-limited and non-linear channel, and 8PSK signal with continuous phase (CP8PSK) is proposed to provide better SER performance in the channel. CP8PSK has higher bandwidth efficiency than GMSK and SOQPSK. Although CP8PSK’s SER performance is 1.5dB worse than traditional 8PSK signal in the Gauss channel, it has better performance in nonlinear satellite channel. With theory analysis and simulation, this paper compares the characteristics of 8PSK and CP8PSK working in the nonlinear satellite channel, especially considering the situation when the amplifier working in the nonlinear area.
Multicommodity-Based Delay Analysis for Heterogeneous Wireless Services in Core Network
Authors: Qin Xiao Wei , Chen Feng
Published: September 2012

With the explosive growth of wireless applications, the subscribers’ requirements of QoS (Quality of Service) are increasing as well. In this paper, the upper bound of the tolerant delay of services in wireless access network is investigated, by mapping core network onto a cost-variable directed graph, where the cost is construed as the average service delay of the ﬂows traveling in core network that depends on the current load. A multicommodity minimal cost ﬂow mathematics problem is then derived and solved by Price-directive Decomposition and Lagrangian Relaxation. Simulations are carried out in two typical core networks and some valuable conclusions are gained.
The Problems in Signal Detection of Multi-Band Spread Spectrum
Authors: Sun Jiang Yan
Published: September 2012

Compared with the traditional direct sequence spread spectrum technology，Multi-band Spread Spectrum have great advantages. According to the basic principle of Multi-band Spread Spectrum, this paper Established the Multi-band Spread Spectrum system model, discusses the signal detection problems in terms of multi-band spread spectrum. Based on the results, it obtained the ruling methods of Gaussian white noise channel under multiple symbols detection and binary bits detection and likelihood ratio information theoretical expressions. And it finds that the two tests have the same mistake-symbol performance through the simulation. The experimental results show that multiple symbol detection and RS code used in conjunction with will achieve better performance.
Web-Based Heating Boiler Control System Research
Authors: Luo Dong Song , Tuo Ji Ying
Published: September 2012

Aiming at the defects of traditional heating boiler control systems, in Geographical limitations, waste of human resources etc. We combines Web technology with traditional heating boiler control strategies, developed a B/S,C/S mixed-mode control system, that allows workers look up data and control heating boilers from Website safely, no matter where the heating boiler located. Website is developed in ASP.NET, other programs are developed in VC++.NET. This system can improve management and production efficiencies, reduce human resources and operating costs.
Study on High Speed Cable Telemetry System Based on ADSL
Authors: Li Jian
Published: September 2012

Cable telemetry transmit is a main way of data transmission in well logging systems .In this paper,due to a variety of shortcoming of logging cable, such as low transmit speed and narrow bandwidth, a DMT technology with the application of ADSL Wide Band is presented . This technology is analyzed theoretically in detail,and it has been proved that this method is feasible in increase the bandwidth using efficiency of the cable by compute emulation.
Traffic Differentiation-Based Network Selection Scheme in Wireless Heterogeneous Networks
Authors: Yu Qin , Fan Jin Lei , Mao Yu Ming
Published: September 2012

The emergence of wireless packet-switched networks such as Universal Mobile Telecommunications System (UMTS), and wireless local area networks (WLANs) can provide voice, data, and video services for users. In this paper, we propose a network selection scheme in the wireless heterogeneous networks based on the traffic differentiation, conversational class, interactive class, streaming class, and background class. Simulation results demonstrate that the proposed network scheme can decide the optimal network to handoff according to the traffic class.
The Application of Finite Element Analysis in Rubber Bladder Forming and Springback Compensation
Authors: Li Guang Jun , Jin Shun Yao , Yuan Sheng , Shao Zong Ke , Xu Xu Dong , Huang Zhong Guo
Published: September 2012

In recent years, finite element analysis technology has been applied in Aircraft sheet metal manufacturing and digital manufacture field. It has become an effective way to solute Aircraft sheet metal precise manufacturing and received extensive attention. Chengdu Aircraft Company used finite element analysis in Rubber bladder forming for the development of aircraft. Parts rough lumber, forming way, tooling structure, forming pressure and springback compensation has been pre-determined. Finite element analysis of Rubber bladder forming shortened the process preparation cycle, and improved the part forming quality and the ability of the development and production.
The Refined Analysis of Axisymmetric Transversely Isotropic Cylinder under Radial Direction Surface Loading
Authors: Zhao Bao Sheng , Wu Di
Published: September 2012

In this paper, the axisymmetric deformation of one cylinder with transversely isotropic is researched. According to the general solution of deformation body with transversely isotropic and the Lur’e method, the exact deformation field and exact stress field are represented by unknown functions with single independent variables. Based on boundary conditions of radial direction surface loading, the unknown functions can be ascertained. By dropping terms of high order, the approximate solution is derived, and the department field and the stress field for a circular cylinder under radial direction surface loading can be obtained. After simplifying, the states with isotropic can be obtained.
First-Principles Calculations on the Electronic Structure of ZnO Nanowires
Authors: Zhang Nan , Zhao Hong Sheng , Yang Dong , Yan Wen Jie
Published: September 2012

Based upon the density functional theory (DFT) in this paper, the first-principles approach is used to study the electronic structure of different cross-sectional diameters of ZnO [0001] nanowires of wurtzite structure. The results show that ZnO [0001] nanowires have a wide direct band gap. Located in the G-point of the Brillouin zone the conduction band minimum and valence band maximum are relatively smooth. The conduction band is mainly composed of Zn 4s and Zn 4p states, and the valence band is composed of Zn 3d and O 2p states. The effective mass of conduction band electrons and valence band holes are large while their mobility is very low which show that conductive ability of pure defect-free [0001] ZnO nanowires is weak. Along with the increase of the cross-sectional diameters, the band gap gradually decreases that indicates quantum size effects are obvious in the nano size range.
Infrared Target Recognition Based on Multi-Features Fusion
Authors: Wu Wei
Published: September 2012

Considering the uncertainty of calculation results by using single feature as measurement of target recognition and identification, this paper discussed the multi-features fusion technology in infrared image recognition classification. The invariant of the singular value and invariant moment feature of infrared target image were used to make fusion. According to Dempster-Shafer Theory, the basic probability assignment was calculated first, and the fusion data was used to make specification decision based on the corresponding rules in the decision-making level. The test result shows that the multi-features fusion method has a better stability, accuracy and reliability in target recognition applications. It can raise the accuracy and fault tolerance ability of infrared image recognition system. So it will have great application value to raise the guidance accuracy of infrared imaging terminal guidance system.
Triangular Interval Type-2 Interpolative Fuzzy Reasoning
Authors: Chen Yang , Wang Tao
Published: September 2012

This paper first gives the definition of interval type-2 fuzzy sets,then investigates interval type-2 interpolative fuzzy reasoning under Triangular type membership functions. Two interpolative fuzzy reasoning algorithms responding to interval type-2 fuzzy inference models in the line of type-1 interpolative fuzzy reasoning algorithms are proposed.
Discriminate Chinese Word Segmenter with Global and Context Features
Authors: Zhu Cong Hui , Wang Shi Liang , Zheng De Quan
Published: September 2012

Chinese Word segmenter is the basis for all subsequent applications of natural language processing. The Corpus-based statistic method has become the predominant method. However, the training corpora are not enough especially in certain areas. Therefore, we introduce some global features and context features in order to get almost the same performance only with much smaller scale corpus. The experiments results show that our approach significantly outperforms the original feature sets in the same training data. Meanwhile, the time-consuming of model training is also reduced. In addition, these features do not depend on classifiers, so our method can easily be changed to other models.
Nodes Setting for the Stationary Model in the Open-Flight Database Based on Creator
Authors: Zhang Zhen Hua , Gao Li , Zhao Min , Liu Lei Lei
Published: September 2012

It is widely acknowledged that the software of Creator can be used to establish a stationary model of a traffic environment. While, when the model is too large and the details are too complicated, especially those with 10000 or even 100000 items, the editing and modifying of the model becomes very difficult. To solve the problem, setting the nodes in the OpenFlight database can be one of the good ways. The paper gives a way of setting the nodes through practice on the base of building the model of the traffic testing field. After validation, the way of setting nodes can not only satisfy the technical requirement such as LOD, but also can simplify the editing and using of the model builder.
Effects of Substrate Temperature on the Properties of Silicon Oxide Films by PECVD
Authors: Li Chun Ya , Li Xi Feng , Chen Long Long , Shi Ji Feng , Zhang Jian Hua
Published: September 2012

Under different growth conditions, silicon Oxide (SiOx) thin films were deposited successfully on Si (100) substrates and glass substrates by plasma enhanced chemical vapor deposition (PECVD). The thickness, refractive index and growth rate of the thin films were tested by ellipsometer. The effects of deposition temperature on the structure and properties of SiOx films were studied using X ray diffraction (XRD), X ray photoelectron spectroscopy (XPS) and UV-Visible spectroscopy. The results show that the SiOx films were amorphous at different deposition temperature. The peaks of Si2p and O1s shifted to higher binding energy with temperature increasing. The SiOx films had high transmissivity at the range of 400-900nm. By analyzing the observation and data, the influence of deposition parameters on the electrical properties and interface characteristics of SiOx thin film prepared by PECVD is systematically discussed. At last, SiOx thin film with excellent electrical properties and good interface characteristic is prepared under the relatively optimum parameters.
The Memory Protection in Embedded RTOS
Authors: Kuang Jian , Shi Quan Ming , Bian Jia Li
Published: September 2012

For Embedded Real Time OS, making use of the MMU features, especially memory protection, is important to meet the needs of those embedded real time applications which requires such support. This paper is meant to implement a memory protection system focused on embedded real time OS. The system is based on memory domain table management. The memory domain table is the data structure to manage memory blocks with access attribute based on MMU support. A suit of architecture independent APIs were provided to set the address and attributes of memory.
Digital Holographic Imaging of Marine Plankton
Authors: Tan Shi Zhe , Wang Sheng Xu
Published: September 2012

Designing an advanced method to sensing marine plankton effectively is highly demanded for acquiring critical marine plankton information data. The goal of this paper is to use digital holographic imaging for sensing marine plankton in recording sampling volume with several advantages such as non-intrusive and non-destructive interrogation of the recording sampling volume. So, by capturing hologram of marine plankton and reconstructing hologram, the recorded optical field of marine plankton is retrieved.
Design and Realization of Integrated Development Environment SI02 Assemble Language
Authors: Yang Hua , Miao Liang
Published: September 2012

This paper mainly introduces a integrated development environment which is only used for developing SI02 assemble language program and realized on pc. The main characteristics of the environment are fully using the exiting resource of computer’s software and hardware, basing on the programming technical of Object Oriented, offering multi-window edit and menu driving, easily using and extending it’s functions.
Survivability Research for Command Information System
Authors: He Xin Hua , Zao Yin Kun , Ma Yi Nan
Published: September 2012

Based on the characteristics of command information system, the concept of survivability is presented. The system survivability framework, analysis model and validation processes are described also.
Design for Frequency Invariant Beamformers Based on Cubic Spline Function
Authors: Yu Hong Qi , Xu Xin , Sun Zhao Lin , Liu Hai Jun , Diao Jie Tao
Published: September 2012

A new method of implementing frequency invariant beamformers based on cubic spline function is presented. Based on the frequency, the sensor distance of the virtual array is generated. The virtual array output is formed from the sensor array by cubic spline function interpolation. The beamformers of every frequency bins in the bandwidth of the signal is similar to that of the referenced frequency. The method is simple and easy to implement. Simulation results demonstrate the effectiveness of the method.
Research and Design of Task-Oriented Software Component
Authors: Zhou Chuan Sheng
Published: September 2012

Alone with the Component-Based Software Engineering (CBSE) has been becoming the mainstream in applications development, there are a lot of people has been used software components to build their applications and business systems. But in practice, how to create a reusable and easy customized component and can be easily integrated into users’ application is still a headache problem to many designers and developers. Here by study and analyzing the interface-oriented software component model and research on the XML and task-oriented technologies, it illustrates a task-oriented software component design and try to improve the CBSE in practice
Unpacking Techniques and Tools in Malware Analysis
Authors: Xie Pei Dai , Li Mei Jian , Wang Yong Jun , Su Jin Shu , Lu Xi Cheng
Published: September 2012

Nowadays most of malware samples are packed with runtime packers to complicate the task of reverse engineering and security analysis in order to evade detection of signature-based anti-virus engines. In the overall process of malware analysis, unpacking a packed malicious binary effectively is a necessary preliminary to extract the structure features from the binary for generation of its signature, and therefore several unpacking techniques have been proposed so far that attempt to deal with the packer problem. This brief survey article provides an overview of the currently published prevalent unpacking techniques and tools. It covers the operation process of packing and unpacking, packer detection methods, heuristic policies for spotting original entry point (OEP), environments for runtime unpacking, anti-unpacking techniques, and introduces several typical tools for unpacking.
Rhizoma Chuanxiong Quality Assessment Based on Grey-Whitened and Gumbel Distribution Similarity
Authors: Lin Jian Yang , Zhou Hui , Kan Zhou Mi
Published: September 2012

According to the traditional morphological classification, the Rhizoma Chuanxiong quality of traditional chinese medicine is divided into recommended products and non-recommended products; the chromatogram data of Rhizoma Chuanxiong are obtained in the standard condition, we inspect and abstract main data, get the main peaks of linear independent vectors. Get every clustering the most likely data of Rhizoma Chuanxiong with Particle Swarm Optimization of synchronous learning factor and Rosenbrock method of Optimization. Make Rhizoma Chuanxiong criterion data as grey-whitened Gumbel distribution and calculate similarity with the sample data of Gumbel distribution and ensure the finial similarity by weighted average. The program will use Simpson double integra and B-spline interpolation. It need to calculate the similarity between unknown sample and the common pattern of corresponding standard sample when analyze unknown sample. This research combines the plant morphology, chemistry, statistics and calculating technology establishing the pattern identification methods of quality, have good attempt to traditional chinese medicine quality assessment methods and make a basic to the deeper research about Rhizoma Chuanxiong in theory and practice.
A VLSI Design of Image Rotation for Real Time 2-D Barcode Identification
Authors: Li Jian Hua , Wang Guo Cheng , Chen Yi , Zhang Meng , Li Ping
Published: September 2012

Image rotation is a necessity for 2-D barcode identification. The computation complexity of image rotation is considered as a key problem of the implementation of real time 2-D barcode identification. This paper presents a novel VLSI structure for image rotation which can calculate the tilt angle of 2-D barcode image and rotate image to the horizontal way. The circuit to calculate the tilt angel of 2-D barcode is simple and effective and can be implemented with low hardware complexity. Image rotation algorithm takes use of improved CORDIC algorithm and Bi-linear interpolation and is implemented by high-speed pipelined architecture. The proposed architecture is implemented on the Altera Stratix IV FPGA. Experimental results show that the proposed architecture can rotate 2-D barcode images with arbitrary tilt angles to the horizontal way at 132MHz. Moreover, it can keep image details clear thus improving 2-D barcode identification rate.
Beamforming Method Based on Least Squares Algorithm and its Distributed Computing Approach
Authors: Zhang Gang Qiang
Published: September 2012

Beamforming performance of autonomous, distributed sonar array degrades due to random position deviation. A new algorithm for beamforming based on Least Squares (LS) approximation of the desired beampattern is proposed in this paper. Elements of autonomous, distributed array are battery-powered and capable of computing with microprocessor. Centralized approach has shortcoming of failures due to excessive power consumption and lower fault-tolerant capability. Distributed computing approach of LS solution has profound significance with respect to longer life period and better robustness for autonomous sonar array systems.
Challenges of Cloud Computing Evaluation
Authors: Shi Peng , Zhang Li Xin , Ai Yi Bo
Published: September 2012

Cloud computing is one of the hottest topics of IT research and industry because of its easy usage and flexible payment. At present, many researchers and projects focus on improving the efficiency and performance of cloud computing. Few researchers have recognized the importance the evaluation of cloud computing and started to investigate the evaluation methods. This paper first surveys research papers and technology reports about cloud computing evaluation. Then the characteristics and influential factors of cloud computing are analyzed. Some important unsolved issues of cloud computing evaluation are proposed. Finally, this paper gives some advice and points out future open problems of evaluation.
On the Equitable Adjacent Strong Edge Coloring of K(n,m)
Authors: Li Jing Wen , Chen Zhi Peng , Yan Guang Hui
Published: September 2012

For a graph G(V,E),then is called k-adjacent strong edge coloring of G, is abbreviated k-ASEC, if a k-ASEC of G satisfies then f is called k-equitable adjacent strong edge coloring of G, is called k-EASC for short, and is called the equitable adjacent strong edge chromatic number of G. In this paper, we have proved the equitable adjacent strong edge chromatic number of graph K(n,m) , with n≥ 2,n≡0(mod 2), m≥ 1.