bluuebunny/crossref_metadata_2025 huggingface dataset:
Sheet Metal Deployment Diagram Application of Oblique Elliptic Cylinder Based on Mastercam and CAGD Graphical Method
Authors: Liao Lin Zhi , Chen Qi , Wu Ni Yan , Chen Hong Rong
Published: July 2013

Aiming at the calculation problem of sheet metal structure workpiece, this paper comes up with a CAGD graphical method based on the graphics software MasterCAM, so as to simplify the traditional lofting job and promote the efficiency. The expanded graph is precise enough to avoid the extra machining. Since the graphical method is endowed with great universality and pragmatic value, it can be widely used in engineering applications.
Design and Implementation of UAV 3D Visual Simulation Training System
Authors: Zheng Xing , Wang Gu Chang , Yang He , Liu Hong Xiang
Published: July 2013

UAV visual simulation training system is a vital part of the UAV simulation training system. It is made up of simulation models for UAV and airborne platform mathematical, UAV visual and ground-station control system. It prevents a realistic virtual environment for UAV operator by simulating UAV flight control law and the actual flight environments. In order to train operational level, test weapons and validate tactical thinking economically and efficiently. This paper prevented the function, architecture, hardware deployment, running conditions and realization of real simulation module.
Vibration Analysis of a Large Pressure Vessel Using the FEA
Authors: Lee Iltaek , Park Chan Gon , Kim Ho Jong , Jung Taeg Yun , Hong Dong Pyo
Published: July 2013

According to the recent rise in oil prices, interest in FCC Unit (Fluid Catalytic Cracking Unit) energy recycling is increasing. Such FCC Unit is a facility which refining low-valued bunker C oil into high-valued gasoline. Pressure vessel that refines crude in FCC Unit needs various interpretation because it operates under high-temp and pressure. Our concern about this FCC Unit is increasing. Experiments about its safety is not enough. In this paper, whether FCC Unit has structural stability or not, we found out FEM(Finite Element Method) analysis after trying 3D modeling by using FCC Units condition of design and critical stress as a translating data. First, we researched the safety of structure applying external factors using the natural frequency. The structure is safe from modal analysis result, the first natural frequency is 13.614Hz , beyond the of the frequency range of the wind (0.001~8Hz) and earthquake (0.1~10Hz).
Research on Avatar-Included Virtual Environment Modeling and Testing
Authors: Pan Tong , Li Xiao Jing , Wang Hao Peng , Zhao Lei
Published: July 2013

It is possible to model and evaluate avatar-included virtual environment in the condition of advanced hardware and software technologies of digital 3D. In traditional design and evaluation, there is no interaction between digital virtual scene and avatars, and no dynamic modifying options for virtual scene. Interaction and dynamic design option are the most important functions for virtual reality simulation. The paper presented the modeling method of avatar-included virtual scene first, discussed the method of testing and evaluating for it secondly. The research can assist and support realization of avatar-included virtual scene real-time interaction, testing and evaluating for stability, security and humanoid.
A Low Noise Amplifier with 1.1dB Noise Figure and +17dBm OIP3 for GPS RF Receivers
Authors: Xiang Yong , Luo Yan Bin , Zhou Ren Jie , Ma Cheng Yan
Published: July 2013

A 1.575GHz SiGe HBT(heterojunction bipolar transistor) low-noise-amplifier(LNA) optimized for Global Positioning System(GPS) L1-band applications was presented. The designed LNA employed a common-emitter topology with inductive emitter degeneration to simultaneously achieve low noise figure and input impedance matching. A resistor-bias-feed circuit with a feedback resistor was designed for the LNA input transistor to improve the gain compression and linearity performance. The LNA was fabricated in a commercial 0.18µm SiGe BiCMOS process. The LNA achieves a noise figure of 1.1dB, a power gain of 19dB, a input 1dB compression point(P1dB) of -13dBm and a output third-order intercept point(OIP3) of +17dBm at a current consumption of 3.6mA from a 2.8V supply.
Research on Optical Fiber Grating Sensor Based on Fabry-Perot Cavity Applied in Oilfield
Authors: Wang Ying Ying , Wang Chang , Liu Xiao Hui , Zhao Qing Chao
Published: July 2013

A kind of optical fiber sensor testing the temperature and pressure under well is present. The temperature is measured by a FBG and the pressure is detected by the F-P cavity. The oxy-hydrogen is used to meld the fiber and glass capillary. The experiment results such as the cavity length changing in a long time under the condition of high temperature and pressure and the pressure calibration results are also given.
Arbitrary Waveform Generator Based on Improved DDS Technology
Authors: Wei Peng , Gao Ting Jin , Fang Hui
Published: July 2013

This article describes an arbitrary waveform generator based on DDS (Direct Digital frequency Synthesis) technology. The arbitrary waveform generator can easily generate DC, square wave, sine wave or any other arbitrary waveform in mill volt or even microvolt level. The generator uses ARM and 51MCU dual-processor system framework. In the system design, we use multiple reference frequency source and dynamically generated waveform data method to generate waveform, which can effectively improve the stability and reduce the distortion of the output waveform.
Information Security Evaluation of the Key Equipment in Industrial Control Systems
Authors: Zhang Zhi Gang , Lv Zhuo , Niu Shuang Xia
Published: July 2013

This paper analyzes the information security risks faced by the industrial control systems, Propose the Information Security Evaluation on industrial control system based on the level protection assessment technology, The development of industrial control system from the device level , field-level and system-level three levels of information security evaluation, propose the next step in the research program.
Research and Application on Improved Group Decision Making AHP Algorithm
Authors: Zhang Jian Dong , Yang Jin , Ma Xuan , Gong Juan Juan
Published: July 2013

This paper analyzes the shortcomings of the traditional AHP method and proposes group decision making from a single decision-making. In group decision making the weight of experts is very important. This paper discusses the existing methods of determining experts’ weights, introduces the method of the similarity of the cosine of the vectors’ angle, and the weight of experts is determined dynamically according to the similarity of the judgment matrix given by experts. When determining the weight of experts, judgment matrixes experts give need to pass the consistency test. In this paper, AHP group decision making method is applied to the load balancing system to determine the index weight influencing on load balancing. The experiment in the paper shows that this method can reduce calculation of consistency test and make the decision-making results more effective.
Dynamic Technique Control on Sectional Warping Machine by Means of Sensors
Authors: Tong Yun
Published: July 2013

Concerning the intelligent technical control of sectional warping machine in textile process, Hall speed encoder is used to detect the speed of the drum and weavers beam so as to adjust the rotating speed with the help of PLC and VVVF to maintain constant tension of warp, the displacement sensor can be used to monitor the sidesway and thickness of warp stripe winded on the drum of sectional warping machine.
A Satellite Ephemeris Correction Calculating Algorithm Based on the Hill Differential Equation
Authors: Zhao Rui Bin , Shao Bo , Li Rui , Huang Zhi Gang
Published: July 2013

The Hill differential equation is used to describe the change characteristic of the ephemeris prediction error in order to calculate the satellite broadcast ephemeris error and the error change rate. After the ECEF coordinate system converses the satellite inertial coordinate system, both the satellite ephemeris correction and the correction accuracy can be calculated by the Kalman filter. When the GEO, IGSO and MEO satellites move over the China, the calculation algorithms based on the weighted least square, the velocity model of the Kalman filter and the Hill differential equation are compared in the computing performance of the ephemeris corrections by using the reference date of IGS website. The simulation results show that: the ephemeris correction solver value based on the Hill differential equation can accurately reflect the ephemeris error characteristics at the current time. And it is able to correctly reflect the perturbation impact for the satellite ephemeris error. The Hill differential equation method is more suitable at the master station for engineering application about the MEO, IGSO and GEO satellites.
Design of Ka-Band Inset-Fed Conical Conformal Patch Antenna
Authors: Hu Zhi Hui , Jiang Yong Hua , Ling Xiang
Published: July 2013

Conical conformal microstrip patch antenna is very important in wireless communication and microwave instrument. In this paper, a Ka-band rectangular inset-fed microstrip patch antenna which conforms to a conical surface has been designed, the specific designed method and parameters were given. Then a conical conformal microstrip antenna is simulated by CST, the difference between planar antenna and conical conformal antenna has been discussed, and the effect of surface curvature on conical conformal antenna resonant frequency of has been analyzed.
Analysis of Packet Transmission Delay in Vehicular DC-ARQ
Authors: Li Suo Ping , Wei Yong
Published: July 2013

Considering the DC-ARQ mechanism, this paper discussed the information transmission cycle of between vehicle nodes in the vehicle and road environment, and obtained the analytical expression of delay performance for GBN-ARQ retransmission protocol. The results obtained in the paper provide a way to improve vehicle ad-hoc network transmission capacity.
The Research of Chirp Signal Based on GNU Radio and USRP
Authors: Geng Yong , Wu Si Long , Jia Fang Kun
Published: July 2013

This paper put forward a research of the chirp signal and its generated method. The research was based on a software-defined radio (SDR) system, which was composed of GNU Radio and Universal Software Radio Peripheral (USRP). It introduced the chirp signal and design algorithm to show how to generate the chirp signal based on DDS technique. And it provided two platforms including the FPGA platform and SDR platform to generate the chirp waveforms. Finally, it analyzed the difference between the two platforms. From the waveforms using these two platforms displayed in oscilloscope, it found that the results based on SDR were better. And it demonstrated that advantages of GNU Radio and USRP.
Application on Secure Communication and General Synchronization of a New 4-D Hyperchaotic System
Authors: Zhang Xiao Dan , Li Xin Li , Petrosyan Vardan
Published: July 2013

In this paper, a new four-dimensional hyperchaotic system is studied. The basic dynamic behaviors of the system are analyzed by numerical simulation. The bound of the chaotic system is estimated. In addition, a constructive theorem is proposed for nonlinear generalized synchronization related to the chaotic system. Example is presented for illustrating our methods and an application in secure communication is demonstrated.
An Adaptive Phase Tracking Scheme of OFDM Wireless Communication System
Authors: Du Qian , Xie Wen Wu
Published: July 2013

This paper proposes a new phase tracking algorithm for the 802.11a system. Since this system illuminates the basic structure of 802.11a system, and introduces the OFDM frame generation principle based the transmitter, phase error estimation and channel estimation. On the basis of this, this paper presents a phase tracking scheme based on adaptive Kalman filter, and then simulates the process based on 802.11a system. The result indicates that the BER has been improved because of this adaptive phase tracking scheme.
Precision Laser Emission Technology Based on Fast Steering Mirror for Space Optical Communication
Authors: Jiang Zhen Hua , Wang Ting Feng , Sun Tao
Published: July 2013

Aiming at the rigorous requirements of space optical communication device to laser pointing accuracy, a laser emission system based on the fast steering mirror is designed. The closed-loop control of the laser pointing can be realized by using the fast steering mirror with the characteristics of high-precision and high-bandwidth and combining the target recognition technology. The laser emission experimental system is built in the laboratory. The experimental results show that the laser pointing control accuracy can be greatly improved by the combination of fast steering mirror control and target recognition technology. Laser pointing accuracy is within 20 seconds to reach the sub-micro-radian magnitude.
Precise Interference Signal Position Control Based on Tetrad of Antenna Array
Authors: Chen Ning
Published: July 2013

In a novel infrared/microwave co-aperture simulator design, tetrad of antenna array was adapted to synthesize the microwave target or interference signal. Based on the analysis of the influence of channels amplitude and phase errors on simulation precision of target position, a feed network and its control process was put forward. In the control process, the phase of the four channels signals fed to tetrad of antenna array was kept constant while adjusting the amplitude. To guarantee the position simulation accuracy, the amplitude and phase unbalance of the four channels was measured and revised in advanced in control process, and an iterative algorithm was designed to improve the position simulation accuracy at the same time.
A Kind of Effective Protection of Privacy and Low Cost RFID Security Authentication Protocol
Authors: Fu Tian , Wang Zhen , Yang Pan Deng
Published: July 2013

With the gradual application of RFID technology, the problems of privacy security arouse people's great attention. To address the problems of the existing RFID authentication protocol, such as the weakness on security and privacy, the high cost and the un-stabilizing systems performance, this paper puts forward a kind effective protection of privacy and low cost RFID security authentication protocol, analyses the security and performance of this protocol. This protocol can not only effectively solve the problems of replay attacks, location privacy attack and data synchronization, but also greatly use the Reader computing resources to reduce the cost of system construction, so it is appropriate for the application of RFID system.
Modeling of Wireless Network Security Authentication Protocol Based on SPIN
Authors: Zhou Li , Tan Fang Yong
Published: July 2013

It’s important to insure wireless network authentication security. Via model checking tool SPIN modeling 802.1x EAP-TLS authentication protocol, communication parts are defined with model checking language PROMELA, security properties are expressed by LTL formula, and the model is verified. With the attack track given by SPIN, the security vulnerabilities caused by the improper configuration is pointed out, meanwhile the new tunnel authentication protocol is proposed to reduce the occurrence of attack and to improve the agreement.
RFID Authentication and Communication Protocol Based on the Dynamic Active Tag ID and Key
Authors: Zhang Xiao Hong , Wang Hui Qin , Bo He
Published: July 2013

The reliability of Radio Frequency Identification (RFID) mechanism is disturbed by illegal tracking and information intercepted.The paper proposed a new active RFID authentication protocol based on the dynamic tag ID and encryption key,which transforms the tag ID using chaotic transformation during authentication and communication between the reader and tags,and realizes mutual authentication of the reader and tags.Through the analysis of security, the protocol not only can ensure the integrity, fresh and confidentiality of data, but also can effectively prevent illegal tracking labels and replay attack.
An Implementation of Configurable SIMD Core on FPGA
Authors: Wang Guang , Gao Yin Sheng
Published: July 2013

In order to meet the computing speed required by 4G wireless communications, and to provide the different data processing widths required by different algorithms, an SIMD (Single Instruction Multiple Data) core has been designed. The ISA (Instruction Set Architecture) and main components of the SIMD core are discussed focus on how the SIMD core can be configured. Finally, the simulation result of the multiplication of two 8*8 matrices is presented to show the execution of instructions in the proposed SIMD core, and the result verifies the correctness of the SIMD core design.
A Novel Design Approach of Reconfigurable Patch Antenna for Wireless Applications
Authors: Jegan Ganapathy , Vimala Juliet A. , Himanshu Singhvi R.
Published: July 2013

In this paper we have proposed an innovative design for a reconfigurable micro strip patch antenna for wireless applications. It has a central patch antenna operating at 7.5 GHz called as driven patch; with two adjacent wing patches which when connected with the central patch reconfigure the operating frequency to 5.5 GHz and 2.9 GHz. The design is performed by using 3D electromagnetic simulator HFSS considering ideal MEMS switches.
Aspect-Oriented Dynamic Weaving Testing Based on Sequence Diagrams
Authors: Xiao Kun
Published: July 2013

Now, the aspect-oriented software development is placed in the initial phase. For the nature of dynamic weaving, it is difficult to test the aspect-oriented dynamic weavings. The methods of the object-oriented testing and the procedure-oriented testing can not be applied in the dynamic weaving testing. In this paper, it analyzes the properties of the dynamic weaving, and induces the constraints in the dynamic weaving. Then, it regards the dynamic weavings as the processes piling the crosscutting concerns up the core concerns, and gives the formation concepts of the dynamic weaving. Following, it appends the weaving semantics to the sequence diagrams, and gives the constraints testing of the dynamic weavings based on the sequence diagrams. This method can give the testing cases through the dynamic weaving designs directly. It solves the transition-problem from the aspect-oriented design to the aspect-oriented testing in some manner.
Architecting Multimedia Content Publish/Subscribe Applications: A Graph-Oriented Approach
Authors: Dong Biao
Published: July 2013

This paper presents an approach, called GOM, for modeling and implementing the architecture of multimedia content publish/subscribe (Pub/Sub) applications using a graph-oriented multimedia (GOM) model. The GOM unites three of the applications aspects, namely the content aspect, the semantic aspect, and the functional aspect, and provides means for the integration of ontological knowledge within the GOM graph structure. A formal definition is proposed for the GOM. Performance is evaluated. The results show that the GOM can easily be constructed, while enabling an efficient management by the publishing and subscribing of multimedia content.
The Design of Telephone Voice Query System for Agricultural Products
Authors: Liang Yu En , Fu Xiang
Published: July 2013

Telephone is one of the most convenient tools for getting informations to users. For the purpose of querying the quality traceable information for agricultural products, this paper presented a own-designed telephone voice query system. The software design of this system is based on 3-layer structured software, and adopted thread technology, database technology and Text-to-Speech(TTS) technology. This system is actually being used in China State Farm Economic Development Center.
A Study of Geo-Hazard Spatial Information Sharing Platform Based on Service
Authors: Wang Zhou Feng , Wang Ying , Yang Yang
Published: July 2013

Considering the frequent geological disaster in our country, it is imperative to construct the public service platform for geological disaster spatial information. Based on the growing demand for spatial information sharing by all sectors of society, government, the public, the paper summarizes and analyzes the background and existing issues of spatial information sharing. In line with the idea on spatial information resources put forward by the state, the paper discusses the target, construction ideas, design architecture of the platform and content on Geo-hazard spatial information sharing services platform, WMI as well as business process at the background of comprehensive and normative internet environment.
Technological Innovation in Software Outsourcing Alliance Based on Trust Perspective
Authors: Zhou Zhi Jun , Qu Wei Yi
Published: July 2013

From social exchange theory perspective, inter-organizational trust can be considered as a resource. It can reduce the potential speculation due to the uncertainty and dependency in inter-organizational exchange. We believe that, in term of the trust itself, there is also a paradox of trust. Namely, the original intention of building confidence among the organizations is to reduce the opportunity risks from the asset specificity. But Technological Innovation in Software outsourcing Alliance are often in a dilemma: to win the trust needs specific investment as a commitment. Once invested, enterprise would face the risk of opportunism because of lack of legal constraints and security for trust.
A Study on the Virtualization Security Management in the Cloud Computing Environment
Authors: Cheong Il Ahn , Lee Seul Gi , Son Kyung Ho
Published: July 2013

Service providers provide virtualized IT resources by using Internet technologies in their services. Users use the provided IT resources as much as they want and pay the corresponding fee. In such cloud computing environments, issues of malicious codes, hacking and leak of confidential information are the biggest concerns of the people involved. In this paper, we study the virtualization security management, which is important for the proper management of collection of virtualization resources information and security events, monitoring and analysis of cloud security situations, and cloud security policies. Specifically, we propose the structuring of the virtualization security management system and the management method to reduce the complexity of administering the virtual machines installed in the cloud data centers caused by the inherent properties of virtual machines characterized by dynamic changes in the form of image files. Therefore, we studied the tracing method for history of infected virtual machines following an analysis of the VM lifecycle status and VM running states.
Research of Cloud Computing Information Management Mode for Oil Enterprise
Authors: Xu Wei Ping , Zhao Huan
Published: July 2013

According to the advantages of cloud computing which is a new technology and the developing state of the information management of oil enterprise, this paper builds a information management mode for oil enterprise based on cloud computing, in order to solve many certain problems in the recent information mode. Analyses the different business needs in the up and down stream in Oil Company, and then build an enterprise hybrid cloud management model. Under this mode, the information management of this company can realize lower IT operating costs, lower energy consumption and higher efficiency, and also take balance between efficiency and data safety. This kind of mode not only fits into the developing need for Oil Company, but also the need for green IT age.
Research on Graphic Displaying Algorithm for Electron Beam Lithography
Authors: Wang Xiu Yi , Fang Guang Rong , Li Bo
Published: July 2013

It takes too much time for the software system of electron beam lithography to display files with large amount of graphic data, which affects the efficiency of electron beam lithography. In this paper, a graphic displaying algorithm is proposed and experimented. The result shows that the displaying algorithm not only guarantees the precision of the graphic data, but also displays files with large amount of graphic data fast, improving the efficiency effectively.
The Study on the Implementation of AOP in .NET Platform
Authors: Dong Zheng Yan
Published: July 2013

AOP(Aspect Oriented Programming) is a programming technology that makes the OOP (Object Oriented Programming) technology more complementary and perfect when being applied together with OOP technology. AOP provides ideal modularized structure for programming. At the moment, AOP has been supported and applied in two leading programming platforms: Java and .Net. Java provides perfect support to AOP, but .Net has not clearly provided the technique to support AOP. Meanwhile, Design Pattern has been widely used in programming. This study analyzes the theory of AOP technique and provides an implementation strategy for AOP based techniques on Proxy Pattern in .Net platform.
Demonstration System of Agricultural Informatization Courses for Web Teaching
Authors: Yang Chuan Sheng , Liu Hai Feng , Jiang You Fu
Published: July 2013

Using our school's agricultural informatization degree functions and characteristics of the teaching platform, we introduce the agricultural informatization network course teaching demonstration system implementation process, the main module, database and platform construction. At the same time the detailed design is discussed. According to practical application, it shows that the teaching system can improve the teaching research, guarantee the quality of teaching, and have good demonstration effect.
Recovering Screen System of 3D Dynamic Scene Based on Massive Marine Data
Authors: Huang Dong Mei , Wang Xiao Shi , He Qi
Published: July 2013

Recovering screen technology of 3D dynamic scene is the main means to demonstrate ocean disasters intuitively. In order to display multi-modal and multi-dimensional marine data, in this system, the Unity3d engine is used as the front-end simulated platform, and Web Service is chosen as the middleware for accessing and processing data. Meanwhile, for the purpose of showing ocean disaster in high-performance way, Shader of Unity3d is used to render refraction and reflection effect of sea surface real-time dynamically, and the algorithm of mapping flow field model to visualization is given to display and update disaster data dynamically. This system replays the overall historical disasters of one sea area many times, and provides the support for disaster analysis.
Mobile Ordering System Based on Android
Authors: Ning Hui Xin
Published: July 2013

With the Rapid Development of Mobile Internet Technology, People Hope Access to Internet to get Information and Service Anywhere and Anytime Urgently. Catering Industry also Hopes to Expand the Scope of Business to Network. in this Paper, through the Requirement Analysis, Using the Currently Popular Android System as the Platform, the Authors Study the Mobile Ordering System Based on Android with the Help of Mobile Internet Technology. the System was Considered the Relationship between the Customers and the Sellers, had Established a Perfect Management Mode and Comprehensive Ordering Function, and Realized the Characteristic Function Based on Google Service. the System is Low Cost, Simple Operation, and Mobility. it Solves the Catering Industry’s Problems of High Cost on Manpower and Inconvenient Online Ordering.
Study on Data Resource Policy in Cloud Computing Environment
Authors: Li Jing , Li Jian Fu
Published: July 2013

Data replication is adopted to improve data access performance in cloud computing environment. When different sites hold the same data resource, there are significant benefits while selecting the best one. In this paper, we propose a new replica selection algorithm based on prediction. Analyzing the factors infecting replica selection, The grey system theory is utilized to help predicting the data response time on the basis the GM(1,1) grey dynamic model; Meanwhile the Markov chain is applied to achieve state transition probability matrix to predict the reliability of replicas in the form of probability by the system state classification. The simulation results show that in our replica selection model, the prediction is valid, helpful to selection decision, and is able to achieve load balance between nodes holding replicas.
A CMOS Temperature Sensor with a Maximum Accuracy of 1.6 °C after One-Point Calibration
Authors: Chen Chun Chi , Liu Keng Chih , Lin Shih Hao
Published: July 2013

This paper presents a time-domain CMOS oscillator-based temperature sensor with one-point calibration for test cost reduction. Compared with the former CMOS sensors with linear delay lines, the proposed work composed of a temperature-to-pulse generator with adjustable time gain and a time-to-digital converter (TDC) can achieve lower circuit complexity and smaller area. A temperature-dependent oscillator for temperature sensing was used to generate the period width proportional to absolute temperature (PTAT). With the help of calibration circuit, an adjustable-gain time amplifier was adopted to dynamically adjust the amplified width that was converted by the TDC into the corresponding digital code. After calibration, the fluctuation of the sensor output with process variation can be greatly reduced. The maximum inaccuracy after one-point calibration for six package chips was 1.6 °C within a 0 80 °C temperature range. The proposed sensor fabricated in a 0.35-μm CMOS process occupied a chip area of merely 0.07 mm2, achieved a fine resolution of 0.047 °C/LSB, and consumed a low power of 25 μW@10 samples/s.
Design and Study of Website Architecture Model
Authors: Wang Yi Tian , Wang Jia Bing , Zhang Wei
Published: July 2013

Website architecture model is introduced in this paper as a whole, it mainly illuminates design process of three layer architecture model, states characteristics and advantages of layer architecture, demonstrates main points and difficulties of every layer design in detail. The model of website design can be reused by applicating object-oriented concept to website design.
A Note on Cluster Validity Indices SV and OS
Authors: Chen Guang Hui
Published: July 2013

Krista Rizman Zalik and Borut Zalik proposed indices SV and OS associating with separation and compactness or overlap. Compactness and overlap were calculated by a few data points of a cluster, which makes the indices able to identify the number of clusters underlying the data set of different sizes and densities. However, the measure of overlap depends on two undefined variants and the measure of compactness are build on randomly selected ten percent data points of a cluster, which makes them difficult to compute and unpractical. This paper supposes to measure the compactness using ten percent of data points of a cluster that are farthest away from the center of the cluster, and revises the measure of overlap so that two undefined variants are eliminated from the measure of overlap. Experiments show that the modified index SV can identify the optional number of clusters underlying the data set of different size and prefers to the indexOS.
Study on Crowdsourcing-Compatible Disaster Information Management System
Authors: Gao Yuan , Ma Lei , Liu Wei , Xu Yu Bin , Liu Qiang
Published: July 2013

While crowdsourcing is developed as a business model, it has become a new method of information exchange under the development of mobile Internet and SNS, and promoted the method of information production and exchanging on Internet. During the processes of global huge disaster relief, mass of information released by normal people have been used and played an important role. Using crowdsourcing in disaster information collection can improve the efficiency of rescue. Based on the analysis of current status of disaster information collection and crowdsourcing model, this paper studied the crowdsourcing-compatible disaster information management system, including its content, architecture and future development direction.
Copulas with Given Rational Function Sections
Authors: Luo Ya Wen , Kang Can , Zhang Chuan Lin
Published: July 2013

We introduce a construction method with rational function horizontal or vertical sections based on the relationship between copula function and its generator. The copulas formula with fraction linear horizontal (vertical) sections is given. In addition, nonexistence about Archimedean copulas with quadratic rational function horizontal or vertical sections has been proved.
The Study and Realization of Customer-Churn Model Based on Date Mining in Telcom
Authors: Jia Yu Bo , Zhang Qian , Ding Qian Qian , Liu Dan Li
Published: July 2013

Customer frequent churn is a serious problem in telecom. In the three major telecom operators, the competition is quite fierce. Owing to lack of a high-efficient prediction model ,the existing means effect is far from enterprise target. This paper proposes a combination model CPM based on constraint model, prediction model and mark model responsible for different job. Customer subdivision is vital for pertinent service further to reduce the rate of latent customers run off.
Exponential Decay of Global Solutions for some Quasilinear Higher-Order Wave Equation
Authors: Lin Ren Bing
Published: July 2013

In this paper we prove the uniform stabilization of global solutions for some quasilinear higher-order wave equation with linear damping term and source term by applying a lemma due to V.Komornik.
Study of an Improved Petri Net Model for Scheduling of DEDS
Authors: Su Guo Jun , Wang Jin , Tian Li Guo
Published: July 2013

Modeling by Petri net for DEDS has been widely used including the robot technology and Semiconductor production line (SPL). It is critical to build a reliable model of DEDS for assessing and optimizing the scheduling of production resources. The HCTPN (Hierarchical Colored-Timed Petri net) model is proposed in this paper, which can effectively deal with the model explosion of basic Petri net by enhancing the describing ability of basic Petri net (the color factor and the time factor will be introduced to the Petri net) and introducing the hierarchical Petri net. At the last of the paper, the simulation results show the effectiveness and reliability of the established HCTPN model of SPL by CPN Tools.
Solutions for a Class of the Higher Diophantine Equation
Authors: Ran Yin Xia
Published: July 2013

We studied the Diophantine equation x2+4n =y7.By using the elementary method and algebaic number theroy, we obtain the following concusions: (i) Let x be an odd number, one necessary condition which the equation has integer solutions is that 26n-1/7 contains some square factors. (ii) Let x be an even number, when n=7k(k≥1) , all integer solutions for the equation are (x,y)=(0,4k) ;when n=7k+3, all integer solutions are (x,y)=(±27k+3,22k+1); when n≡1,2,4,5,6 the equation has no integer solution.
A Hybrid Document Recommender Algorithm Based on Random Walk
Authors: Zhang Zhi Ping , Li Lin Na , Yu Hai Yan
Published: July 2013

Research shows that recommendations comprise a valuable service for users of a digital library. We proposed a hybrid document recommender system based on random walk. It builds correlation network among users based on the conditional probability in order to solve the sparsity of collaborative filtering. On the other hand, it computes the rating of source user for target item not only based on the neighborhoods’ ratings for target item but also based on the neighborhoods’ ratings for item which is most similar to target item. This can solve the cold start problem of recommender systems. We performed an evaluation on the dataset of National Science and Technology Library. Experimental results illustrate the superiority of the proposed method.
Classification for Alzheimer’s Disease from Structural MRI by General N-Dimensional Principal Component Analysis
Authors: Tang Song Yuan
Published: July 2013

In this paper, we propose a classification method for Alzheimer’s disease from structural MRI. In the method, a specific template is firstly constructed. Then all data are registered to the template and the corresponding Jacobians are calculated. And then, a general n-dimensional principal component analysis (GND-PCA) based method is adopted to extract features from the Jacobians and the features are enhanced by the linear discriminant analysis (LDA) . Finally, the enhanced features are used for the support vector machines (SVMs) classifiers. The proposed method classifies AD and normal controls (NC) well.
Fiber Bragg Grating Sensor Multiplexing System Based on FMCW
Authors: Sheng Li Wen , Xiong Yan Ling , Yang Wen Long , Li Shuo Duo , Jin Xue Ming , Wang Li
Published: July 2013

The addressing principle of distributed optical fiber Bragg grating (FBG) sensor based on frequency modulation continuous wave (FMCW) multiplexing technology was studied. The effect of grating position information, scanning time and scanning frequency range on the spectrum signals was analyzed by simulation. The FMCW multiplexing system, which was composed of the arbitrary waveform generator, light intensity modulator and multiplier etc, was established and the certifications were delivered by the experimental system.
Modified Stochastic Gradient Algorithm for Hammerstein Systems
Authors: Lv Li Xing , Chen Jing
Published: July 2013

This paper proposes a modified stochastic gradient algorithm for Hammerstein systems. By the Weierstrass approximation theorem, the model of the nonlinear Hammerstein systems be changed to an identification model, then based on the derived model, a modified stochastic gradient identification algorithm is used to estimate all the unknown parameters of the systems. An example is provided to show the effectiveness of the proposed algorithm.
*-Finite Graph and Its Applications
Authors: Chen Dong Li , Zhang Yan , Ma Chun Hui
Published: July 2013

By the method of nonstandard analysis, the definition of *-finite graph is given, and necessary and sufficient conditions of *-finite graph are obtained. Further, by the Transfer Principle, we apply the theory of finite graph to *-finite graph, embed given infinite graph into some *-finite graph, and finally obtain the related results of infinite graph.
Hybrid Projective Synchronization of Complex Dynamical Networks with Fractional-Order System Nodes
Authors: Zhang Fan Di
Published: July 2013

This paper investigates the problem of hybrid projective synchronization (HPS) in dynamical networks with fractional-order hyper-chaotic system nodes. Based on the stability analysis of fractional-order systems and nonlinear control technique, we propose a novel and general approach to realize the synchronization of complex network. A nonlinear controllers are designed to make the fractional-order complex dynamical networks with distinct nodes asymptotically synchronize onto any smooth goal dynamics. Numerical simulations are presented to demonstrate the effectiveness of the proposed synchronization scheme.
Research on Dual Bellows FBG Pressure Sensor
Authors: Yang Wen Long , Xiong Yan Ling , Li Qiao Yi , Jin Xue Ming , Wang Li
Published: July 2013

A metalized FBG pressure sensor encapsulated by dual bellows structure was designed based on the strain characteristics of optical fiber Bragg grating (FBG) and osmotic sensing principle. And the experimental system of dual bellows FBG pressure sensor is established. The experimental results show that the pressure sensitivity coefficient of dual bellows FBG pressure sensor is 184.98nm/MPa with the measuring range 10 kPa. The correlation coefficient is better than 99.9% and the resolution is up to 0.05% full scale (FS). The sensitivity of dual bellows structure is high, which indicate that the dual bellows structure encapsulation is suitable for the sensoring in small measuring range.
The Application of Information Barrier Technology on the Neural Network Recognition System
Authors: Xu Peng , Huo Yong Gang , Li Su Fen , Di Yu Ming
Published: July 2013

In order to protect sensitive information of the nuclear materials recognition system from leaking, this article combined with the functional requirements of information barriers and design elements, designed neural network verification system solutions and hardware and software. Taking into account the dual function of information barrier requirements, verification display terminal and main control analysis unit are separated in the design of hardware. To achieve the tiered management system categories, multi-user permission management and special features of the individual authorization are used in the design of software. In the end, the authentication method of the system is discussed.
The Applied Research of Information Barrier in the Arms Control and Verification System
Authors: Huo Yong Gang , Xu Peng , Li Su Fen , Han Feng
Published: July 2013

Information barrier technology could meet the dual requirements to protect sensitive information and have a high confidence in the verification. It is an integrated mature technology in many fields which include nuclear detection science, nuclear electronics, and data encryption processing, and so on. It uses mature hardware and software technology to form multiple layers of protection to get the purpose of the protection of sensitive information. In this paper, the information barrier functional requirements and objectives are combined, the verification information barrier program is designed, and the system authentication method is discussed.
A Security Strategy of Mobile Agent System
Authors: Li Ying , Hu Bao Fang , Wei Chen Lin
Published: July 2013

The paper aims at the security issues of the mobile agent system to propose a mobile agent system based on tracking mechanism which has a third-party certification center similar to an authority sector, whose hosts and mobile agents in mobile agent system are required to be registered in the third-party certification center so as to obtain a digital certificate issued by the third-party certification center. Each server launching mobile agent has a static communication agent Tracker, responsible for maintaining the context information launched by the mobile agent and agent migration thereby solving problems in the labyrinth and authentication of mobile agent in traditional mobile agent system so that the existing mobile agent system can become more secure and reliable.
The Optimal Design of ZigBee Networks Routing Algorithm for the Marine Environment
Authors: Zou Guo Liang , Han Jie Ai
Published: July 2013

On the basis of analysis of the existing ZigBee network routing strategy, to save network energy consumption and balance the network load, the paper proposed an energy-efficient improvements and applied it in the marine environment, designed a marine monitoring the Internet of Things with ZigBee wireless monitoring network, satellite communications and remote monitoring management in the integration. The strategy improved ZBR routing algorithm based on the cluster-tree algorithm and AODVjr algorithm. The improved strategy can reduce the routing overhead while fully consider the protection of low energy nodes, effectively reduce network energy consumption, balance the network load to maximize network lifetime.
GSM Intelligent Home Security System Based on MCU
Authors: Xia Gui Shu
Published: July 2013

In order to improve the security of home, an intelligent home security alarm system based on Micro-programmed Control Unit (MCU) has been designed in this paper, which can monitor the doors and windows, and communicate with intrusion alarm system by using GSM. Practical measured results indicate that this system can complete the function of home security alarm, which has a strong practical popularize value.In order to improve the security of home, an intelligent home security system based on MCU has been designed in this paper, which realizes en-mg checking, password storage, sound/short message warning service and real-time monitoring through GSM network. The hardware and software designs are illustrated in the paper. Finally, the test is carried out and the results indicate that the functions of system have achieved the design goal.
Study on Signaling Storm in 3G Networks
Authors: Yong Li , Hou Yi Bin
Published: July 2013

Signaling storm becomes one of the complicated problems for 3G networks due to booming development of smart phones and mobile internet services. In this paper, the basic mechanisms of fast dormancy, resource allocation and periodic heartbeat signaling for typical services are analyzed, as signaling storm is caused by the discoordination between terminals, networks and services. Some improvement suggestions are also proposed to reduce the network overhead under the guaranteed user experience.
Simulation and Analysis of RIPv1 and RIPv2
Authors: Yang Quan Fen , Shi Heng Hua , Zhao Zhi Yi
Published: July 2013

After research on RIPv1 and RIPv2 of Dynamic Routing Protocol, simulation and modeling for RIPv1 and RIPv2 based on Packet Tracer simulation software. In the same simulation network topology, the simulation experiments compare RIPv1 and RIPv2 with the routing table, route update messages, route summarization, and the function of discontinuous network. The simulation results show that RIPv2 has more advantage than RIPv1.
A Hamilton Path Embedding Algorithm on DCell
Authors: Wang Xi , Fan Jian Xi , Cheng Bao Lei , Liu Wen Jun , Li Fei Fei
Published: July 2013

DCell has been proposed for enormous data centers as a server centric interconnection which can support millions of servers with high network capacity and provide good fault tolerance by only using commodity switches. In this paper, we study an attractive algorithm of finding Hamilton paths in dimensional. The time complexity of this algorithm is , where is the node number of DCellk .
Design and Implementation of Network Examination System in College Sports Theory
Authors: Liang Jian Xun , Wang Ji Tao
Published: July 2013

Design and develop the Network Examination System with the application of SQL Server, Asp.Net technology. Improve and realize the application of random testing paper, on-line testing and scoring as well as on-line statistics and analysis so as to ease the supervisors and teachers, save huge human resources and budget and increase the efficiency of teaching management.
Design and Realization of Management System for University Sports Scores
Authors: Xiao Bing , Li Lin Yong
Published: July 2013

We adopt rapid prototyping method to develop the system, depend on the rapid prototyping creation tool to achieve the design and implementation of management system of university sports scores, aim at simplifying the calculation and statistics of sports scores, realize the informatization management, and deliver the cumbersome calculation and statistics work to computer to accomplish automatically.
Study on a Multi-Depot and Heterogeneous-Vehicle Open Vehicle Routing Problem to Reduce Fuel Consumption
Authors: Zhang Li Hua , Wang Ming Yang
Published: July 2013

An open vehicle routing problem is studied. In this problem, multi-depot, heterogeneous-vehicle, fuel consumption and start-up costs of vehicles are considered, thus a genetic algorithm is given to solve this hard problem. In order to improve the performance of the genetic algorithm, a heuristic algorithm is provided to produce the initial population and participate in crossover. An example is given to illustrate the genetic algorithm.
Key Technique Research and Application of Public Urban Management Interaction Based on Augmented Reality
Authors: Guo Liang , Yang Wei Jun , He Hua Gui , Chen Zhi Fen , Huang Ming Xiang
Published: July 2013

The project is mainly to study the mobile terminal application of public interaction urban management process based on augmented reality ( AR ) technology. In the real three-dimensional interactive process, using the augmented reality technology , such as: image recognition, position location, object recognition and tracking technology. According to the tracking, positioning and calibration technology, we complete the detection of the position and orientation, and transmit data to the mobile terminal to enhance the augmented reality ( AR ) system. In this system the coordinates of tracked objects in the real world and the in the virtual world were unified to achieve seamless integration of the virtual world and the user environment , so that the reality and virtual information can achieve continuous interaction