bluuebunny/crossref_metadata_2025 huggingface dataset:
Recognition of Facial Expression via Kernel PCA Network
Authors: Hu De Kun , Ye An Sheng , Li Li , Zhang Li
Published: September 2014

In this work, a kernel principle component analysis network (KPCANet) is proposed for classification of the facial expression in unconstrained images, which comprises only the very basic data processing components: cascaded kernel principal component analysis (KPCA), binary hashing, and block-wise histograms. In the proposed model, KPCA is employed to learn multistage filter banks. It is followed by simple binary hashing and block histograms for indexing and pooling. For comparison and better understanding, We have tested these basic networks extensively on many benchmark visual datasets ( such as the JAFFE [13] database, the CMU AMP face expression database, a part of the Extended Cohn-Kanade (CK+) database), The results demonstrate the potential of the KPCANet serving as a simple but highly competitive baseline for facial expression recognition.
Symmetrical Fourth-Order Partial Differential Equation De-Noise for THz Pulse Imaging
Authors: Xing Hai Tao , Liu Jian Jun , Chen Chao Yang , Du Yong
Published: September 2014

Over past several years, there has been a significant interest in employing terahertz (THz) imaging technology. Due to low contrast and bit noise in scanning THz pulse imaging, a novel fourth-order partial differential equation (PDE) denosing algorithm is proposed in this paper. The proposed approach is capable of overcoming THz pulse image block suppressing noise and preserving the sharp edges at the same time. A symmetric discrete algorithm based on four-neighbor system is developed to solve the new model. Median filtering is applied to alleviate the speckle effects in the processed image at last. Experimental results are provided to show that the proposed approach outperforms the image denoising approaches developed in the literature, which is useful for further image processing and recognition.
The Research of the Real-Time High-Resolution Image Acquisition Based on Embedded System
Authors: Feng Xi Ye , Huang Xiu Qing
Published: September 2014

This paper presents the design of a real-time high-definition image acquisition. The hardware platform combines Intel Xscale PXA270 processor, high-resolution camera and SAA7114H. The system is based on the embedded Linux system. Beetween the image sensor and the system memory,there is a quick capture interface.The interface receives the data from the image sensor,and converts the raw image data to a suitable format, and sends H.264 stream to the memory via the DMA channel. The result shows that the design can realize the real-time and high-definition image acquisition in a complicated environment. The advantage of this system is small volume, low power consumption and low cost. It can be widely used in agricultural and hydrological monitoring, intelligent transportation, security monitoring and intelligent home.
Information Real-Time Transmission Algorithm Based on Mobile Platform
Authors: Cai Ai Ping , Zheng Xin
Published: September 2014

the application of mobile learning is the main application of intelligent mobile terminal realizes on pattern, this paper focuses on the Android platform to realize mobile multimedia data real-time transmission, by optimizing the data transmission speed, to meet the learners' online learning, for subsequent teaching and interaction provides a good technical support.
Smoothly Rendering of Large-Scale Vector Data on Virtual Globe
Authors: Yang Chao , Dai Shui Yan , Wu Ling Da , Yu Rong Huan
Published: September 2014

The method of view-dependent smoothly rendering of large-scale vector data based on the vector texture on virtual globe is presented. The vector texture is rasterized from the vector data based on view-dependent quadtree LOD. And the vector texture is projected on the top of the terrain. The smooth transition of multi-level texture is realized by adjusting the transparency of texture dynamically based on view range in two processes to avoid texture “popping”. In “IN” process, the texture’s alpha value increases when the view range goes up while In “OUT” process, the texture’s alpha value decreases. the vector texture buffer updating method is used to accelerate the texture fetching based on the least-recently-used algorithm. In the end, the real-time large-scale vector data rendering is implemented on virtual globe. The result shows that this method can real-time render large-scale vector data smoothly.
Maintaining Dynamic Information Systems Using Incremental Dominance-Based Rough Set Approach
Authors: Li Yan , Liu Xiao Qing , Hou Jia Jia
Published: September 2014

Dominance-based rough sets approach (DRSA) is an effective tool to deal with information with preference-ordered attribute domain. In practice, many information systems may evolve when attribute values are changed. Updating set approximations for these dynamic information systems is a necessary step for further knowledge reduction and decision making in DRSA. The purpose of this paper is to present an incremental approach when the information system alters dynamically with the change of condition attribute values. The updating rules are given with proofs, and the experimental evaluations on UCI data show that the incremental approach outperforms the original non-incremental one.
A Reasoning Method of Transformer Fault Causes Based on Fuzzy Petri Net
Authors: Zhang Wei Hua , Yuan Jin Sha , Zhang Ke , Li Zhong
Published: September 2014

For a correct judgment on the fault cause of transformers with the rich knowledge in various criteria and guideline, a method of automatic reasoning for the fault cause through fuzzy Petri net has been put forward in this paper. In this method, the knowledge in criteria and guidelines is firstly presented in the form of IF-THEN structure through the production rule, based on which the fuzzy Petri net model of fault cause is established then; and lastly possibility of each fault cause can be worked out through matrix iteration, which means the automatic reasoning is completed. Based on fuzzy Petri net imaging, this method makes the reasoning clearer and the result be got faster. The example calculation verifies that the method is correct and feasible in practical projects.
Design and Simulation Analysis of Two-Phase Grating-Type Displacement Sensors with Unequal-Pitch
Authors: Wang Xian Quan , Zhang Hong Guang , Lei Yi Tan , Zhu Gui Lin , Yu Yao
Published: September 2014

With the development of grating displacement sensors towards higher precision and higher speed of dynamic responses, the traditional design structure is hard to solve the processing difficulty of the increasing number of poles for time grating sensors. In order to realize the analysis on the internal magnetic field distribution of high precision displacement sensor, the unequal pitch grating displacement sensor with two phase model is established using Ansoft Maxwell simulation environment. The feasibility of the two unequal pitch grating displacement sensor and magnetic field simulation are performed based on the proposed sensor model. In addition the detailed synthetic method is proposed for the simulation data. The analysis show the feasibility of the unequal pitch grating displacement sensor with two phase. The proposed displacement sensor decreases the difficulties of machining process technology and increase the pole number. As the result, the measuring precision is improved.
Precise Ranging Technology Application Research Based on IEEE802.15.4a
Authors: Wei Zi Hui , Feng Zheng He , Wang Zhi Feng , Cai Duan Bo
Published: September 2014

To solve the poor location accuracy of wireless sensor networks using Received Signal Strength Indication (RSSI) ranging. Time Of Flight (TOF) ranging is used to ensure the accuracy based on two optional physical layer of Impulse Radio-Ultra Wide-Band (IR-UWB) and Chirp Spread Spectrum (CSS) in IEEE802.15.4a. In this paper, we designed ranging module utilizing CSS and UWB. In the Line Of Sight (LOS) and None Line Of Sight (NLOS) environments ranging accuracy test is implemented, the test results show that the IR-UWB ranging technology can achieve higher ranging accuracy and better multipath resistance compared to CSS.
A Calculation Method of Transformer Fault BPA Based on Spatial Interpolation and IEC60599
Authors: Zhang Wei Hua , Yuan Jin Sha , Zhang Tie Feng , Yang Hong
Published: September 2014

The diagnostic conclusions by IEC60599 gas ratio method cannot be directly applied to DS Evidence Theory for information fusion. In order to solve the problem, this research proposed a calculation method for transformer fault BPA based on spatial interpolation. Firstly, the fault characteristic space defined by IEC60599 gas ratio method was analyzed. Based on the analysis results, the entire fault characteristic space was divided into several rectangular units through spatial discretization. Next, the BPA function of faults in each unit was formulated by 8-node hexahedral unit interpolation. In this way, the continuous BPA function of faults in the entire space was obtained. This method not only met the requirements of BPA function but also enabled the numerical reflection of various fault possibilities in the calculation results. Thus, this method extended the application of IEC60599 gas ratio method. With example calculation, the correctness and feasibility of this method in actual engineering projects were verified.
Modeling and Test of Aerodynamic Force for a Piezoelectric Transducer Drive Mechanism
Authors: Lu Jing , Hang Yan Fang , Hu Ying Jun
Published: September 2014

To reduce the complexity structure of a flapping rotor, a piezoelectric transducer drive mechanism is designed to achieve active flapping and passive rotary motion. Then, its aerodynamic force model is built by using Theodorsen's theory in order to analyze the aerodynamic characteristics of this system. Model simulation and experimental results show that flapping amplitude, flapping frequency and initial angle of attack make a significant role for aerodynamic characteristics. The effectiveness of aerodynamic force mode also can be seen from the comparison of the results.
The Research on the Tracking and Positioning Platform Based on the Android Smartphone
Authors: Xu Mei Hui , Wang Ya Qi , Xu Long Xi
Published: September 2014

The 3G era, the smartphone market share is higher and higher. The mobile phone based on the Android platform accounts for more than half of the market share. Once the user lost the phone, it is not only hard to find, but also to face important data leak and privacy security issues. So, the demand to provide mobile phone found function appears increasingly urgent. If the mobile phone is lost, this platform can get information on replaced mobile phone SIM card to boot for the first time, and upload the new mobile phone number and current phone location information to the server. It provides users with inquiry function on the web in order to achieve the purpose of tracking the lost mobile phone. The application prospect of this study is widespread, not only limited to track the missing phone, also involves other position service in the life need. The relevant mobile localization algorithm is detailed in this paper.
Optimal Algorithmic Trading Strategy with the Price Appreciation Cost
Authors: Yan Ru Zhen , Li Ping , Zeng Yong
Published: September 2014

Financial markets has witnessed an explosion of algorithmic trading strategy which can help traders especially involved in high-frequency trading efficiently reduce invisible transaction cost. The VWAP strategy usually used by traders can only decrease the cost of price impact by breaking block order into small pieces. However, the behavior of such order splitting may result in inevitable opportunity cost as well as price appreciation. This paper establishes a new algorithmic trading strategy to minimize total transaction costs including price impact, opportunity cost and price appreciation. The results show that the total transaction cost of this optimal trading strategy is lower than VWAP strategy.
In Situ Shear Test of Zhongnan Concave Landslide
Authors: Wang Nian Qin , Xue Yao Qiong , Cheng Xiao Yu , Pang Qi
Published: September 2014

The mechanical parameters of rock and soil has an important position in the project, the accuracy of the landslide’s mechanical parameters is very important in landslide stability, displacement forecast and prevention engineering design, compared with the laboratory tests, the in-situ tests have many outstanding advantages, the results are more according with the actual. This article through the in-situ shear test of the celadon and purplish red sandy mudstone which in zhongnan concave, detailed describes the test principle, sample preparation and test scheme, to provide a kind of strength parameters acquisition method, at the same time provide definite reference to the congeniality rock and soil.
Study on the Beneficiation of an Oxidised Copper Ores in Yunnan Province
Authors: Jiang Tai Guo , Wei Zhi Chong , Zhang Tie Min
Published: September 2014

For a refractory oxidised copper ores in Yunnan province, studing the beneficiation of a oxidised copper ores sulfide flotation behavior. The results showed that: When ethylenediamine phosphate was added with the dosage of 120 g/t, the final copper concentrates were gained with the grade of 21.06% and recovery of 83.20%. Compared to the direct sulfide flotation, the concentrate grade was raised by 3.59% and the recovery was increased by 7.33%.
Design and Implementation of an Intelligent Home Control System
Authors: Xu Bai Quan
Published: September 2014

With the development of computer technology, networking and information technology, and the requirements for the continuous improvement of living, enjoying smart household life has become possible, and become the inevitable tendency. This paper introduces a kind of smart home control system which based on 32-bit embedded processor ARM platform and the ZigBee wireless network communication technology. This system was designed to aim at the ordinary residential district family user, which can realize the concentration supervisory control and management to the housing safe condition, and achieve the household electrical appliances' remote control.
Flocking with Fault Tolerant Control and Obstacles Avoidance for Mobile Robots Based on Grid Maps
Authors: Xiong Yong , Lin Ji Liang
Published: September 2014

Taking α-lattice flocking as research object, the influence when faults occur in flock and its fault tolerance control algorithm is studied. The impact on flocking performance is analyzed by means of flocking property indexes when communication error, actuator failure or sensor malfunction occur. A flocking fault diagnosis method and fault tolerance control strategy based on communication and data association are introduced. Considering failure mobile robots as obstacles, a complex shaped obstacles avoidance algorithm is proposed. Simulation shows the effectiveness of the method.
The Design and Analysis of Control System Applied in Artificial Grass Tufting Machine
Authors: Dai Hui Liang , Lin Yao , Song Jia Ling
Published: September 2014

Based on the analysis on the control requirements of artificial grass tufting machine, this thesis proposes an overall plan on control of CANopen bus. In the control system, on the basis of CoDeSys softPLC technology of fieldbus control system, LMC20 enables the communication by making CANopen bus connect with ATV71, OTB module and these underlying slave stations. The humanized operation interface realized by touch screens and user-friendly application which is developed through CoDeSys have been put into operation in factory. All of those implement the functions of signal acquisition and display, protection, control, etc.
The Design and Implementation of Remote Optimization and Control System of Cement Industry
Authors: Zhang Chong Shan , Jing Shao Hong , Ma Qi Long , Shi Liu Gang
Published: September 2014

With the rapid development of cement industry in China, looseness of information management and hardness of production line optimization control have became an utmost important issue. In this paper, we design and implement a remote optimization and control system via B/S architecture, which is under the model of ASP.NET MVC. Conclusively,this system implements the functions which are data analysis and processing of cement enterprises,optimization control of production line and meta-analysis of enterprise information.
Research and Application of Enterprise Operating Situation Prediction Based on Decision Tree
Authors: Qin Ye , Yang Song , Wang Wei , Luo Xiao Dong , Cheng Jian Li , Li Ting Ting
Published: September 2014

After years of stable operation, a group enterprise equity management information system has accumulated a large amount of historical operating data. At present, the enterprise operating situation analysis is primarily based on statistical inquiry, so we cannot find out the operational decisions information which includes future trends among the data, and that information are often deeply hidden. In this paper, the decision tree applying to the situation classification prediction is presented, including the construction of a professional field data warehouse, data preprocessing and discretization, decision tree algorithm and tree pruning optimization algorithm using weights. Through the experiment, the prediction accuracy may reach 95.8%. By use of enterprise operating situation analysis based on data mining technology, we can find out useful information for the enterprise management decision, strengthen the correct judgment in marketing operation and other aspects, thereby enhancing the market competitiveness.
Risk Assessment of Cascading Failure Considering Adverse Weather Condition and UPFC Corrective Control
Authors: Shi Peng Jia , Xu Neng , Chen Jian Ying , Guo Chuang Xin
Published: September 2014

This paper investigates the effect of Unified Power Flow Controller (UPFC) on the risk of cascading failure which resulted from adverse weather based on the risk-based security assessment (RBSA) method. An improved piecewise probability model is described to reflect the impact of adverse weather condition and overloads. Based on power-injection model of UPFC, an optimal power flow control strategy is integrated into the RBSA procedure to relieve the risk of cascading failure caused by initiating event. Furthermore, a sensitivity based approach is adopted to determine the optimal location of UPFC. The effectiveness of the proposed method has been tested on IEEE RTS-79 system.
Study on the Prediction Control Model Based on GM(1, 1)
Authors: Zhang Zhong Cheng
Published: September 2014

With the development and application of prediction theory in the fields of engineering and control, the grey prediction model is introduced. Real estate can be regarded as a grey system in the engineering circle, and housing price is an uncertain indicator which is affected by multiple factors such as policy, market, and economy. In this paper, we study the prediction control problem of housing price, and present a prediction control model of housing price based on GM(1, 1). From the house price data of Huanggang city in recent five years, we use this prediction control model to predict the development trend of housing price in the next five years. We try to provide an effective reference for housing price control.
The Design of Bolts Tighting Test System for Launch Vehicle Based on PLC and Servo Motor
Authors: Wang Tao , Zhang Ming Li , Chen Yong Kun , Sun Jin Yun
Published: September 2014

Bolts are widely used in Launch Vehicle. This paper presented a design of bolts tighting test system for launch vehicle based on PLC and Servo Motor. PLC controller and Servo Motor were selected. The stress and displacement of the main load-bearing component was checked by the finite element method (FEM). PID closed-loop control was employed; the influence of PID parameters on the response curve was discussed.
The Correction of Steering Gear Monitoring and Control Parameters Based on the Method of Least Squares
Authors: Wan Jun Li , Li Guang Yang , Liu Hao , Cheng Shi Run
Published: September 2014

In the potentiometer as the Angle sensor monitoring and control system, the relationship between voltage sampling value of potentiometer and the angle actual value is linear, but there are more interference in the measurement and control environment, contributing to the relationship of the actual value and the sampled value deviating from the set of linear relationship. In order to improve the performance of the controller, the controller operating parameters need to fix, this paper uses the method of least squares treatment sampling data to correction controller parameters. Experiments show that the curve fitting accuracy improve greatly after data processing.
Modeling NCS Base on 1553B Bus with CPN
Authors: Bi Jing Cun , Liu Yan Fei , Yang Wei Jun , Li Qi
Published: September 2014

According the characteristics of the tasks and the messages transmitted in Networked Control System,the CPN model of NCS is established. The model is detecting by using the simulation facility provided by CPN tools. It indicates the model is validated.
Keyword: 1553B bus,Networked Control System,Coloured Petri Nets
Three-Dimensional Geological Modeling and its Application in Gas Hydrate
Authors: Li Pan , Hu Liang
Published: September 2014

We selected the Shenhu region in South China Sea as our research area, and use 3D modeling methods to develop visualization technologies oriented to strata modeling of irregular gas hydrate, hybrid rendering of ore bodies and boreholes, and contour extraction. Through real-time display of seismic attribute data volume, 3D geometry building, and integrated modeling of geologic strata and seismic attributes based on these technologies, we accomplished overlay analysis of seismic attributes, and spatial distribution description and detailed geologic feature depiction of gas hydrate bodies in the test area, and acquired good results.
A MAC Throughput in the IEEE 802.11ac over Error-Prone Channel
Authors: Lee Ha Cheol
Published: September 2014

This paper analyzes a MAC (Medium Access Control) layer throughput over error-prone channel in the IEEE 802.11ac-based wireless LAN with DCF (Distributed Coordination Function) protocol and A-MPDU (MAC Protocol Data Unit Aggregation) scheme, using theoretical analysis method. The MAC saturation throughput is evaluated by using a PER (Packet Error Rate) on the condition that the number of station, transmission probability, the number of parallel beams and the number of frames in each A-MPDU are variables. When the PER is 10-2 and the number of aggregated MPDUs in each A-MPDU is 20, it is identified that the MAC layer throughput of IEEE 802.11ac can be maximally attained up to a 92.8% of physical transmission rate.
Design of Communication for Commodity Trading System
Authors: Qi Chang Xing
Published: September 2014

This article first describes the position and role of the communication system in the commodity trading system. According to TCP communication protocol, comprehensive using JSON and related technology,designes a communication program which used to connect the client to server. In this paper, the communication protocol, the design of the communication class, loading balancing strategy, improving the efficiency of the communication methods are expounded in detail.
Improved Constant Modulus Algorithm for Blind Equalization of QAM Signals
Authors: Mwangosi Emmanuel Anania , Yan Cang , Ur Rehman Naveed
Published: September 2014

The paper present new approach for improving the steady-state error performance of Constant Modulus Algorithm (CMA), it is well known that for higher level modulations such as QAM, CMA does not perform well. Several techniques have been proposed in recent years to deal with slow convergence and MSE performance of CMA. Constellation matched error has been seen to offer best performance by providing the cost function with the knowledge of the constellation symbols. New constellation match error function is studied, simulation is performed, it can be witnessed that 4dB improvement stead state error performance.
Set of Frequency-Hopping Sequence with Optimal Hamming Correlation
Authors: Wang Hong , Huang Ping
Published: September 2014

In wireless communication systems, frequency hopping (FH) spread spectrum and direct sequence spread spectrum are two main spread coding technologies. In this paper,by the Cartesian product, we construct one class of one-coincidence frequency-hopping sequence set. It is shown that this set has optimal balance property, optimal average periodic Hamming correlation properties and optimal average periodic partial Hamming correlation properties according to the bounds.
The Algorithm Design of Optical Fiber Topological Query
Authors: Hu Chao Ju , Tian Ying
Published: September 2014

In order to achieve the query of the topology for optical fiber, transform the original problem into a node traverse problem on the graph by treating the optical fiber cable resources management system as graph model. Through the analysis of the physical structure of the optical cable and related business, reinvesting the nodes and edges on the graph with different meaning.Setting up some special edge to reduce the search for node,and the traditional traversal algorithm is improved by this strategy.At last the result of experiment for this algorithm design is shown on Google-Map.
Threaded Space Time Code Design for CPM with Joint Decoding
Authors: Lei Guo Wei , Liu Yuan An , Xiao Xue Fang
Published: September 2014

In the letter, a system of continuous phase modulation (CPM) with threaded space time codes (TSTC) is proposed for multiple-input multiple-output systems. In the system, source bits are coded via outer coder of Reed Solomon (RS). The codeword of which is suitable for TSTC design. Then inner coder mainly converts binary symbols into M-ary symbols for purpose of CPM. At receiver, Joint soft decoding approach is considered. Finally simulation results are provided for VBLAST, DBLAST, and TSTC as comparison.
Application of OFDM Technology in 4G Mobile Network
Authors: Liu Qiao Ping , Yang Yan Ning , Li Wei Xia
Published: September 2014

OFDM (Orthogonal Frequency Division Multiplexing) is a special kind of multi-carrier digital modulation technique. Each OFDM subcarrier exists orthogonality and great use of spectrum resources. To a certain extent, the problem of shortage of spectrum resources will be eased in the future. OFDM has a good ability to resist inter symbol interference and fight against frequency selective fading, and be able to adapt to the future wireless high-speed data transmission without distortion. Each channel modulation and demodulation with FFT and IFFT is easy to implement and meet the need of the business in the wireless communication system. The paper introduces the basic principle of OFDM technology, describes the advantages of OFDM and the defects needed to be overcome. Moreover, we analyzes the characteristics of 4G technology and discusses the application of OFDM in 4G mobile network.
A Novel Proxy Re-Encryption with Keyword Search
Authors: Meng Xian Yong , Chen Zhong , Meng Xiang Yu
Published: September 2014

In this paper, a novel proxy re-encryption (PRE) scheme with keyword search is proposed, where only the ciphertext containing the keyword set by the delegator can be transformed by the semi-trusted proxy and then decrypted by delegatee. In the proposed scheme, the semi-trusted proxy can convert the ciphertext encrypted under the delegator’s public key into the ciphertext encrypted under the delegatee’s public key. In addition, only the delegatee’s email gateway with a trapdoor can test whether or not a given cipheretext containing some keyword, but can learn nothing else about the sensitive data of email. We proposed an identity-based proxy re-encryption with keyword search scheme, where the delegator and the delegatee extract keys from a trusted party called the key generator center (KGC), who generates public-private key pair for delegator and delegatee based on their identities. Meanwhile, the identity-based proxy re-encryption with keyword search scheme satisfies the properties of PRE including unidirectionality, multi-use and transparency. Additionally, the proposed scheme is efficient in terms of both computation and communication, and can realize security privacy preserving in cloud computing environments.
Cluster-Based Intrusion Detection Model for Wireless Sensor Network
Authors: Zeng Xia Ling
Published: September 2014

An intrusion detection system (IDS) using agent technology was designed for wireless sensor network of clustering structure. An IDS agent which includes two different agents was deployed in every node of network. One is local detection agent and another is global detection agent. They complete different tasks of detection. Based on Bluetooth communication technology, Bluetooth scattering network formation algorithm TPSF was employed to construct the cluster layer of sensor network and to finish task assignment of different agents. The TPSF algorithm was improved by limiting the role of nodes to lighten the complexity of nodes, so the IDS agents can work effectively and the safety coefficient of nodes is improved.
Right Transfer Method Based on Double HASH Chain
Authors: Zhu Ping , Lu Mu Yao
Published: September 2014

This Paper analyzes security issues during the process of the right transfer, sums up the basic needs during the transfer and the defects of existing rights transfer, and puts forward the right transfer program based on double HASH chain, which achieves the transfer of the digital right under the control of HASH Distance and meta-rights. Security analysis shows that the authentication, integrity, confidentiality, and impartiality of the program are well guaranteed.
Security Protection and Solving Procedures of University Network
Authors: Li Jun , Ao Teng He
Published: September 2014

The development of computer and network technology greatly make changes in current society and our life. It affects daily life, study, work as well as scientific research. Internet itself is open and unrestricted, which becomes a much complex running environment due to gradual expansion and feasibility of all kinds of network applications. Meanwhile, network confronts security threats coming from different paths. It is utmost important for the network designer and manager to protect and secure the running network. Campus network that connects to the internet performs information exchange and communication on teaching, research work and so on. It also consider as an indispensable facility of college. The securities of network often suffer threats because of its special utilizations. In order to establish and maintain an effective and high security network, the efficient procedures, methods and strategies seem to be very imperative in modern campus network.
Network Security Risk Assessment Based on Fuzzy Analytical Hierarchy Process
Authors: Peng Xi , Cui Jian Qun
Published: September 2014

This paper proposes an evaluation method based on fuzzy analytic hierarchy process (FAHP) for network security risk assessment. The paper analyzes the network security risk factors. By paired comparison of the importance of factors, the interval number fuzzy complementary judgment matrix is established to get the weight vectors of interval numbers of the factors. Then, by comparing the weight vectors of interval numbers, a possibility degree matrix is established, and then the weight coefficient of each factor are obtained. Finally the sorting result of the network security risk factors is presented. Instances show that the method is feasible and effective and it provides a reliable basis for security risk control strategy of network security staff.
The Analysis on Recursive Algorithm Implementation of Preorder-Traversing Binary Tree
Authors: Song Yu Cheng , Jin Shao Li
Published: September 2014

Traversing binary tree is an important algorithm in data structure. This paper analyses and discusses the recursive algorithm implementation of preorder-traversing binary tree through instance. It would contribute beginners to understand more deeply the process of preorder-traversing and enhance their programming.
An Algorithm Based on Double-Threshold Energy Detection in Cognitive Radio
Authors: Li Yuan , Chen Jia Yin , Liu Xiao Feng , Yang Ming Chuan
Published: September 2014

Aiming at the situation where the double-threshold detection has been widely used without complete mathematical proof and condition of application, this paper proves its correctness under the circumstance of spectrum sensing, and circulates the condition where this method can work. The proof and simulation show that, comparing with traditional energy detection, this method can increase the probability of detection by 27% to 42% at most when the SNR is between-15dB and-2dB, while the probability of false alarm is increased by less than 2%.
Research on the Control System of the Lower Limb Rehabilitation Robot under the Single Degree of Freedom
Authors: Xiong Ming
Published: September 2014

This paper studies the PID control algorithm of foot-pedal lower limb rehabilitation robot which can be viewed as a single closed-loop DC speed regulating system. It is necessary to ensure the steady state of the system under various types of interference and the setting of PID parameters will take a lot of time and energy. For this reason, GA (Genetic Algorithms) is used to set the PID parameters in this paper, PID parameters optimized by different goal functions are presented. The simulation results show that the GA simplifies the setting of PID parameters, for different goal functions make the system outputs have different characteristics.
Design of the Walkers’ Exercise Information Service System
Authors: Liu Shu Wei , Wu Yan Wen , Tian Yu Chong , Jin Kai
Published: September 2014

In this paper, we connect the pedometer to the mobile phone or personal computer using the platform of IOT. This reduces the defect of pedometer as a single node. The pedometer part integrates ADXL345 acceleration transducer and MSP430 MCU to get the data of steps, energy consumption and speed of a walker with low latency, then uploads this digital information to mobile phone or personal computer using Bluetooth technology. The data information can be uploaded into the pedometer server to realize online query of walkers' exercise records, exercise guidance and other function.
Multi-Visual Features Based Ship Detection in Remote Sensing Images
Authors: Hu Xiao Guang , Cheng Cheng Qi , Li De Ren
Published: September 2014

In this paper, we propose a novel ship detection method based on multi-visual features after analyzing the characteristics of ship in the sea. According to the principal of the visual contrast, brightness and orientation saliency map of ship object are respectively generated, and then they are integrated to obtain the total saliency map. In addition to the brightness and orientation of the ship objects, the method doesn’t use other prior knowledge of them. In ship detection experiment, the experimental results prove our method can effectively concentrate on the ship objects regardless of their size and brightness, and thereby improve the capacity of visual attention in complex scene. Thus, the design idea of our method is verified.
Computing the Medical Image Registration Using Meta-Heuristics
Authors: El Karim Tahari Abdou , Abdeslam Bendakmousse , Samy Ait Aoudia
Published: September 2014

The image registration is a very important task in image processing. In the field of medical imaging, it is used to compare the anatomical structures of two or more images taken at different time to track for example the evolution of a disease.
Intensity-based techniques are widely used in the multi-modal registration. To have the best registration, a cost function expressing the similarity between these images is maximized.
The registration problem is reduced to the optimization of a cost function. We propose to use neighborhood meta-heuristics (tabu search, simulated annealing) and a meta-heuristic population (genetic algorithms). An evaluation step is necessary to estimate the quality of registration obtained. In this paper we present some results of medical image registration
A Low-Impact Deployment Hinge Based on a Novel Intermittent Mechanism
Authors: Guo Hong Wei , Li Zhong Jie , Deng Zong Quan , Shi Chuang , Liu Rong Qiang
Published: September 2014

A novel intermittent mechanism and low-impact deployment hinge based on intermittent mechanism are presented in this paper. This application is contemplated to lower the impact dramatically at the end of hinge deployment. The overall deployment process is described and the maximum impact force and angular velocity are derived. The effect of the intermittent motion mechanism on free spring deployable hinges is evaluated by indexes of maximum angular velocity and impact force. Cases are simulated to verify the mechanism design, and results show that the maximum angular velocity and impact force can be decreased by more than 90%.
Effect Investigation of the Circumferential Grooves on the Static Characteristics of Hydrodynamic Journal Bearing Using CFD Method
Authors: Meng Qing Zheng , Cai Lin , He Miao
Published: September 2014

The performance of a hydrodynamic journal bearing with different center circumferential grooves (CGs) is investigated using Computational fluid dynamics (CFD) simulation. The influences of the CG extended angel have been investigated based on the numerical model. The results show that the CG of millimeter range depth in load zone is not good for the bearing performance but it is opposite in unload zone.
Research on Undercooling Grain Refinement Technology
Authors: Zhang Wei Ran , Geng Gui Hong , Chen Wei Ye
Published: September 2014

Grain refinement can greatly enhance the material mechanics, magnetism and other physical properties. Exploration of grain refinement methodology has been one of the hottest fields of material research. Among all the methods, deep supercooling technology is an effective way to refine the grains. In this paper, the grain refinement mechanism has been explored by deep supercooling and rapid solidification technique with introducing grain refined process of pure metal, binary uniform crystalline alloy and the binary eutectic alloy. Furthermore, peritectic grain refinement mechanism and rapid solidification technique have been discussed.
Analysis and Research on the Current Quality of Automotive Interior Materials
Authors: Cao Jian Xiao , Yu Hong Xiu , Wang Shen Si
Published: September 2014

Statistical analysis on the combustion characteristics of interior materials is made based on two tests of random sampling. The common problems of current interior decorating pieces are found and studied. This study has important implications for the analysis of the current situation of the quality of automotive interior Materials.
Applications of the Optimal Configuration of Section Switches in the Digital System of the Distribution Network Wiring Diagram
Authors: Xia Chuan Kun , Yang Peng Fei , Liu Si Qing
Published: September 2014

the optimal configuration of section switches requires the nonlinear integer programming and the technology, reliability and economy should be taken into account. Therefore, this paper put forward a planning method to determine the optimal additional number and installation position of section switches, which is based on the original frame and switches and combined with the drawing functions in the digital system of the distribution network wiring diagram. The objective function of this method considers the annual investment cost of section switches, the annual operation maintenance cost and the annual loss in outage. It also gives consideration to the correction of investment constraints on the jurisdiction index interval to calculate the number of required additional section switches. Finally, the digital system of the distribution network wiring diagram is utilized to simulate the actual configuration of switches, and the configuration of section switches is optimized by simulating faults through disconnecting the power supply.
Uniform Stability of Discrete-Time Switched Nonlinear Systems
Authors: Sun Shu Rong , Zhang Guang Rong , Zhao Ping
Published: September 2014

In this paper, we study the stability properties of a general class of nonautonomous discrete-time switched nonlinear systems. The switched systems consist of stable and unstable subsystems. Based on Lyapunov functions, some sufficient conditions for uniform stability, uniform asymptotic stability and uniform exponential stability are established.
System of Telecontrol by the Mobile Robot with Movable Camera
Authors: Katsurin Alexey
Published: September 2014

The paper solved the task of development of the system of telecontrol by the mobile robot and algorithm of its work which allows automatically considering mutual orientation of a movable camera and the basis of the mobile robot. In this case the operator sets control signals using the image on the monitor. The robot moves in the specified direction with any initial orientation of a movable camera and the basis. Such algorithm was developed, simulated on model and realized as the program module.
Robot-Assisted Vibration Polishing of NiCo Retroreflector Moulds
Authors: Elsner-Dörge Frederik , Riemer Oltmann , Brinksmeier Ekkard
Published: September 2014

Galvanic retroreflector moulds suffer from fabrication errors and considerable wear due to the manufacturing process and the subsequent use for injection moulding. To remove degradations like flaws and wear marks from the mould’s optical surfaces without tedious manual labour, a partially automated process chain using a 6-axis robot is being developed combining surface metrology and machining technology. The areal limitation of the structured surfaces excludes conventional rotatory polishing processes. Vibration polishing is applied instead to remove critical surface errors and to enhance surface roughness to a near optical value of Sa ≤ 50 nm. The work presented in this paper gives insights into experiments performed on a robot polishing system and illustrates and the suitability for an application in the aforementioned partially automated process chain.
An Improvement of the Time Dependent Method Based on the Coefficient of Correlation for the Determination of the Forming Limit Curve
Authors: Merklein Marion , Kuppert Andreas , Affronti Emanuela
Published: September 2014

Due to the global energy policy according to the aims of economic efficiency and environmental compatibility the production of lightweight constructions is nowadays a need in many fields of mechanical engineering, especially in automotive and aerospace sectors. The substitution of conventional deep drawing steels with modern sheet metals, i.e. aluminium or high strength steel, provides a positive contribution towards this trend. Prerequisite for an efficient application of these resources is a comprehensive material characterization including the analysis of the formability as well as the failure behaviour. Regarding the accurate prediction of forming behaviour, a robust failure criterion is necessary in order to perform the numerical simulation designs by using finite element method (FEM). The leading criterion used for sheet metal forming is the forming limit diagram (FLD). The FLD gives a graphical description of material formability by plotting the major strain values related to the minor strain values to failure in a curve called forming limit curve (FLC). With the improvement of the digital image correlation (DIC) techniques, which provide very accurate strain measurement, new methods relied on the strain history of the specimen during the test are proposed to determine the FLC. Within this paper, the time dependent method based on the coefficient of correlation is investigated. In particular an improvement dependent on experimental parameter is presented in order to increase its sensibility and reliability for different materials.
Design of an Electromagnetic System to Avoid Horizontal Ram Displacement
Authors: Gröne Michael , Salfeld Valerian , Krimm Richard
Published: September 2014

Forming complex asymmetric parts lead to high horizontal process forces applied to the ram of a forming machine. These forces entail horizontal ram displacement and influence the quality of the finished parts negatively. By application of horizontal counterforces to the ram, the displacement could be avoided and the process stability could be improved. This paper presents a design of an electromagnetic system, which is capable to apply such high horizontal counterforces. To obtain high counterforces and a high dynamic simultaneously, the techniques premagnetisation and overexcitation have been tested numerically. Both mentioned techniques improve dynamic of electromagnetic systems by a large extent as illustrated in the paper.
Decrease of Springback by Geometrical Modification of the Sheet Metal Part
Authors: Weinschenk Annika , Volk Wolfram
Published: September 2014

Super high strength steels are used as the importance of lightweight construction increases. They induce a high amount of springback during removal of a tool and this has to be compensated. Previously developed methods of springback compensation [1] have two disadvantages. Firstly springback of a u-shaped profile cannot be compensated in one deep drawing step. Secondly these methods only take the material parameters of one sheet metal batch into account. With varying material properties, problems arise because the tool is especially designed for one sheet metal batch. Therefore the objective of this work is not to compensate springback but to reduce it by a preventive measure which allows the production of a u-shaped profile by one deep drawing step. An additional advantage of the measure, which consists of a geometric change of the punch radii and is defined by several parameters, is that the influence of the sheet metal batch on springback is significantly reduced. This can be realised by a suitable choice of values for these parameters. Apart from this measure a method was developed whereby appropriate values for the parameters can be determined on the basis of a metamodel without the need of individual simulations. By way of example the method is applied to a u-shaped profile, however it can be used for structural components in general.
Avoiding Collision Damage of Motor Spindles through an Innovative Overload Protection System
Authors: Berger Matthias , Korff Dennis
Published: September 2014

Different causes lead to unforeseen contact situations between moving components in the working space of machine tools. These collisions can result in damage of the machine components. High cost and machine downtime are the consequences. This article presents a solution for the reduction of contact forces in case of collision. The damages of the machine structure and the main components like the motor spindle can be successfully avoided. Further a modified mechanism with higher stiffness and better process properties of the protection system will be described and compared to the current status.
Modular Control Integrated Correction of Thermoelastic Errors of Machine Tools Based on the Thermoelastic Functional Chain
Authors: Thiem Xaver , Großmann Knut , Mühl Andreas
Published: September 2014

This paper gives a short overview of the structure based correction of thermoelastic errors of machine tools. Measured load data of the machine control and structure based simulation models are used to calculate the error at the tool center point in thermal real time. The derived correction can be divided in modules, which are described on the example of a ball screw.