bluuebunny/crossref_metadata_2025 huggingface dataset:
The Design of Wireless Sensor Network System Based on ZigBee Technology
Authors: Yan Li Ming , Wang Zhong Hua
Published: January 2012

Based on ZigBee theory, the MC13213 module produced by Freescale company are adopted , and the star-network is established upon MAC 802.15.4 protocol stack. The paper advances the hardware design of the network node, and introduces in detail the thought of establishing network. A simply temperature sensor network is established through experiment, which proves the reliability and stability of the system.
The Design and Realization of Gray LED Controller Based on ARM+FPGA
Authors: Liu Xiao Ming , Zheng Shu Hui
Published: January 2012

Based on the system hardware structure and the function of ARM system and the function of FPGA circuit, the realization of gray led controller is put forward. This way not only enables the developing work to be devided clearly, but also enhances the expansibility of the controller, sustains complex show, and makes the realization simply. This system has been realized and the effect is right. Keywords-component; formatting; style; styling; insert (key words)
Optimal Output Tracking Control for Nonlinear Systems with External Disturbances Based on Stability Degree Constraint
Authors: Gao De Xin , Wei Rui , Cui Bao Tong , Zhang Bao Lin
Published: January 2012

This paper considers the optimal output tracking control problem for nonlinear systems affected by external disturbances based on stability degree constraint. The objective is to find an optimal output tracking controller, by which the cost function minimum and the state with the optimal having a higher mean-square convergence rate can be obtained. An optimal output tracking law is derived from a Riccati equation and Matrix equations. We give the existence and uniqueness conditions of the control law. Finally, a practical example is given to illustrate the effectiveness of the theory.
An Engineering Vehicle Positioning System for Carrying Rocket Using Extended Kalman Filter
Authors: Qian Jun , Zeng Yi Shan , Wang Shu Wang
Published: January 2012

In order to verify a quick launching system for rockets with small and medium sizes, an engineering vehicle localization and navigation sub-system is presented in this article. The structure of the launcher includes the front board and two cylindrical landmarks on both sides. When the vehicle gets close to the launcher, two 2D laser scanners on the vehicle detect the launcher reliably. And an extend Kalman filter is used to estimate the vehicle’s pose relative to the launcher. The localization and navigation results show that the lateral positioning error is smaller than 1cm so that the vehicle could align with the launcher accurately.
Study of PLC Communication Technology Based on Profibus-DP
Authors: Ma Jun Gong , Jiang Hong Wei , Chen Juan
Published: January 2012

his paper provides a method for the communication between PLC and IPC using Profibus-DP bus. It introduces the setting steps on the software Simatic and Labview. Using EM277, S7-200 can communicate with S7-300.And based on OPC technology, Labview can send and receive control message to S7-300.Profibus-DP bus can quickly delivers control digitals from Labview to S7-200.And this system is used in some space project, and have good results.
A Lower Energy-Aware-Based Routing Protocol Oriented to Internet of Things
Authors: Wang Hao , Tan Guo Zhen , Jiang Yao
Published: January 2012

As energy of reader in Internet of things is limited, we can only decrease energy overhead of protocol and balance energy consumption among readers to extend the network lifetime as much as possible. Combining with characteristics of Internet of things and requirements of low-energy, energy-aware-based routing protocol was selected for wireless networking of readers. Three methods dealing with how to decrease the energy and how to prolong the wireless network’s life expectancy are proposed in this paper. They are power mode switch based on power control, data mining technique as well as indefinite prolonged transmission. Based on these low-energy measures, improved energy-aware-based routing protocol was designed and performance was simulated for analysis. Simulation results show that improved protocol is superior to original one in aspects of total energy cost and network lifetime.
Towards Deploying Vehicular Ad Hoc Networks on Aerodromes to Mitigate Incursions
Authors: Zaki Salim M. , Ngadi M. A. , Razak Shukor Abd
Published: January 2012

In the near future, it is expected that wireless communication go to be extended to support safety movement in aerodromes. Vehicular Ad Hoc Network is one of the promise wireless technologies that provide safety applications for pre- venting and mitigating cars accidents on roads. Vehicular Ad Hoc Network’s safety applications usually use geographical routing protocols and 802.11p wireless standard which help in disseminating safety messages between vehicles efficiently and reliably. A proficient connection between aircraft, vehicles, and Air Traffic control can be handled by Vehicular Ad Hoc Network to exchange necessary messages between these parties to be aware when vehicles use the aerodrome. Thus, this paper proposes a scheme for mitigating incursions on aerodrome’s manoeuvring area through deployment of Vehicular Ad Hoc Network. Moreover, this paper discussing utilizing Vehicular Ad Hoc Network technology for controlling and supporting safety movement on manoeuvring area.
Active Collision Avoidance Control for Fractionated Satellite Clusters in Ellipse Orbit
Authors: Yang Wei Wei , Cao Lu , Zhao Yong , Chen Xiao Qiang
Published: January 2012

The active collision avoidance maneuver of fractionated satellite cluster is studied. Especially, two clusters with different structure configuration in ellipse orbit and the collision description method between them are discussed. Due to the limitation of the collision probability based on the minimum distance, a new method is developed which including the effect of relative velocity on collision. Only J2 perturbation is considered in the relative dynamics and a PD controller based on BP neural network using automatic differentiation method is adopted when a collision is imminent. The simulation results validate that the presented active collision avoidance control law is effective.
Division of Iterative-Transportation Based on State Estimation Using Local Observation
Authors: Sato Yuta , Kobayashi Yuichi , Gouko Manabu
Published: January 2012

This paper deals with a framework of decentralized approach to division of labor by multiple mobile robots. An iterative-transportation task by multiple robots with multiple sets of starts (pick-up place of the object) and goals (put down place) is considered as the task. On each route between a start and a goal, the efficiency of transportation improves when the number of robots increases. Due to jams, however, excessive number of robots on the same route causes inefficiency. We propose a control law of each robot to choose an appropriate route so as to optimize the total efficiency of the transportation, where each robot utilizes information which can be obtained only by local observation (without any explicit communication among robots). The proposed control is based on the estimation of the number of robots on the routes in the future by using EXPAR model. In simulation, it was verified that the proposed control law realized the similar level of the efficiency by appropriately choosing the route, compared with the case where global information can be utilized.
Research on the Design of Linear Drive Motor of New Pumping Unit
Authors: Ma Wen Zhong , Zhang Hong Mei , Sun Jin Yan , Tian De Bao , Pang Hong Fei
Published: January 2012

The new energy saving pumping unit driven by linear induction motor (LIM) not only can overcome many disadvantages of traditional beam-pumping unit, but also has a lot of advantages, such as reliability, high operating efficiency, etc. So it arouses the universal concern of the oil industry. This paper focuses on the study of linear motor. Firstly, it analyzes the advantages of the pumping unit driven by LIM relative to beam-pumping unit, then in accordance with the system design requirements and based on the electromagnetic design method of linear motor, makes the theoretical calculation and the structure design of the motor, determines specific parameters of LIM, produces LIM applicable to the practical application to drive pumping unit. Lastly, makes field experiments, and experiments results show that LIM has reached the design requirements, also verify the correctness and feasibility of the design method.
Research on Hydrodynamic Characteristics of Structure in Internal Waves
Authors: Yao Jin Wei , Cai Ze Wei , Xu Yong Chun , Gu Yao Dong
Published: January 2012

This paper describes the latest research progress of the hydrodynamic characteristics of structures exerted by internal waves in a continuously stratified fluid. In particular, the research of internal waves in the two-layer fluid has done a detailed description.
Finite Element Analysis of Woodball Mallet during Swing Stage
Authors: Lu Yi Chen , Gu Yao Dong
Published: January 2012

This study aims to analyze the relevant mechanical properties of woodball shafts by applying numerical methods. The structures of woodball were constructed in Solidworks 2007 to form the solid models, and the numerical model was analyzed in ABAQUS to acquire the simulation resluts. The collision speed between ball and mallet was from the experiment of motion analysis. As the maximal stress of mallet was concentrated in the proximal part of bottle, some enforcement design could be carried out in this part to reduce the fracture incidence. Another important finding is the contact area at the mallet head was really small, the rubber cover at head part may thicken at the centre part and thinner at the outside area. For further study, it is important to represent the higher fidelity of the input conditions for the finite element analysis (FEA).
Cross-Layer QoSArchitecture for Mobility Management over Heterogeneous Wireless Networks
Authors: Wang Ping , Chen Lu Wei , Song Mei , Zang Ying Hai
Published: January 2012

The development of wireless networks brings people great convenience. More state-of-the-art communication protocols of wireless networks are getting mature. People attach more importance to the QoS provisioning in heterogeneous wireless networks. This study proposes a cross-layer-based mobility management Quality-of-Service (QoS) architecture that includesthe QoS manager、the cross-layer scheme and the access control algorithm.In order to provide the QoS support for mobile user, the overall architecture for QoS management is required in heterogeneous wireless environment, where various mobile users are connected to the different access network through the core network. The QoS manager is composed of ANQM (Access Network QoS Manger) and IANQM (Inter-Access Network QoS Manger) which are used to provide consistent QoS management over an integrated wireless access network environment. The access control algorithm is based on the QoS mapping mechanism between the access network and the core network.The simulation result shows that the QoS for mobile user is guaranteed more effectively and this mechanism provides an end-to-end QoS between different access networks.
Approximate Packet Delay Analysis for IEEE 802.16 Networks
Authors: Tsai Chen Nien , Ke Kai Wei , Wu Ho Ting
Published: January 2012

Supporting QoS is one of notable features in IEEE 802.16 networks. In this study, we used the queuing-theoretic approach to model the uplink air interface of IEEE 802.16 networks as M/Db/1 queues. The justiﬁcation for this modeling argument was given in the paper. The average queuing delay and system delay were derived with embedded Markov chain technique. We also pointed out that the created Markov chain exhibits geometric tail behavior so that the Markov chain can be solved more eﬃcient. The analytical results were veriﬁed through computer simulations. The derived results would be supporting the design of packet scheduling or admission control.
The Design of the Power Saving Mechanisms for IEEE 802.16e Networks
Authors: Yan Lei , Wu Ho Ting , Ke Kai Wei
Published: January 2012

The high transmission rate for IEEE 802.16e (WiMAX) system can afford many kinds of high quality mobile services but also induces the higher power consumption. Therefore, the IEEE 802.16e specification proposes the power saving function for MSs. However, the actual implemented sleep duration for MS is fragmentary and short. In this paper, we have proposed a complete solution of the power saving function, which includes the Call Admission Control (CAC) algorithm, the Bandwidth Allocation (BWA) algorithm, and the packet scheduling algorithm to prolong the sleep duration of MS for UGS/ertPS, rtPS, nrtPS, and BE traffics. The simulation result reveals the efficiency of sleeping mode and the excellent performances in packet delay and dropping probability.
The Information Theoretic Perspective on Context Aware Network Design
Authors: Wang Jing Yao , Li Meng Jia , Song Mei , Zhang Ying Hai
Published: January 2012

Information theory has made great impact on the research of communication systems. However, analyze and design of networks has not benefited too much from information theory. Therefore, in this paper, we propose the information-theoretical framework of context aware network to explore the relationship between the information and the network performance. We also analyze the information traffic process in context aware network. To illustrate our approach, we analyze the architecture of context aware network by the information entropy produced in the network, and discuss the way to improve the performance of context aware in an information-theoretic perspective. The results in this paper may be also used to design other network and guide the future network design.
Performance Comparison for Routing Protocols in Multi-Radio Multi-Channel Multi-Hop Wireless Networks
Authors: Ning Zhao Long , Peng Yu Huai , Guo Lei
Published: January 2012

In this paper, we consider a TDMA-based wireless network and address two major issues, fading and interference, existing in wireless networks since fading will lead to low quality links and interference may lead to unfair channel allocation. Because channel allocation selects the proper channel for each logical link and routing determines through which logical links the packets should be forwarded, there is strong interaction between MAC layer and network layer. In this paper, we seek for the performance trend with more channels allocated and further compare the performances of Bellman-Ford and AODV routing protocols based on the Packet Deliver Rate (PDR) to MAC layer in multi-radio multi-channel multi-hop wireless networks. Numerical results are given and discussions as well as insights into performance aspects for multi-radio multi-channel deployment are provided.
Identified Traffic Partition Grooming in Multi-Granularity Optical Network
Authors: Hou Wei Gang , Guo Lei , Wang Xing Wei , Ning Zhao Long
Published: January 2012

Currently, the required bandwidth of users tends to be diversity, i.e., coarse-granularity demands (e.g., terabit/circuit routing) and small-granularity demands (e.g., sub-rate traffic streams). Only employing traffic grooming or waveband switching may result in several traffic-diversity problems. Therefore, the traffic partition grooming technique with considering traffic transferring is proposed in this paper to solve the traffic-diversity problems, especially for achieving blocking probability reduction and port savings. Correspondingly, we devise the heuristic and Identified MG-IGAG (IMG-IGAG) algorithm based on Granularity-Layered Graph (GLG) since the problem of grooming is the NP-hard. The simulation results show that our IMG-IGAG is more effective and practical than other state-of-the-art methods.
Failure Analsys of Wrapped Pin Joint of Composite and Metal
Authors: Sun Jiang , Karel Blahouš
Published: January 2012

By filament winding technology, a pin hole can be formed in the process of composite manufacturing through wrapped fiber tow around pin, so fiber tows around the pin hole are continued. The paper presents the failure analysis for this kind of pin hole. The experimental results and numerical results show that the pin hole has a good tensile bearing ability. According to Hashin criteria, numerical results show that main failure modes are fiber tensile failure and matrix tensile failure which are agreed with the experimental results.
Evaluation of Vehicle Combination Property Based on Evidential Reasoning Method
Authors: Chang Rui , Xu Yan , Yu Dan , Su Hai Bin
Published: January 2012

Evaluation of vehicle combination property involves multiple attributes of both a quantitative and qualitative nature with uncertainty, and there is incomplete information in the assessment process .Evidential reasoning(ER) method is introduced to transform quantitative and qualitative information to uniform distribution .With the ER ,the general values of assessment can be obtained through aggregating the lower attributes, then decision is made using utility theory. The example demonstrates the effectiveness of the ER method.
A Web Service Transaction Coordination Framework Based on Compensation
Authors: Chu Mei , Guo Guang Nan , Yun Yong Gang , Shi Hong Yan , Liu Jin Ping
Published: January 2012

The atomicity characteristic of traditional transaction processing makes entire transaction process to naught in case of specific event or error. To address problem of traditional transaction processing and combining with characteristics of Web service transaction processing, a Web service transaction coordination framework based on compensation was presented. The coordination algorithm and state transformation of long transaction were also provided. The framework mainly provides fault recovery of Web service to ensure atomicity of transaction and consistency of compensation. It permit participant submitting sub-transactions independently to deal with transaction fault with compensation, which can meet requirements of business transactions cross-enterprises.
Design of High-Precision FIR Filter Based on Verilog HDL
Authors: Yuan Jun , Feng Quan Yuan , Wang Dan
Published: January 2012

This paper presents an optimized FIR filter implementation by using the method of improving coefficient precision at reasonable cost. The comparable results of traditional fix-point implementation and the optimization method show that the high-precision FIR filter design method is universal and easy to implement. Plus the employment of multi-stage pipelining and parallel structure, FIR filter performs higher operating frequency. Let’s take a 32-order lowpass FIR filter as an example, original coefficients are generated on MATLAB, and translated into optimized coefficients according to the optimization method. The functional simulations verify the effective performance, while the synthesis is carried out to analyze the utilization of resources and maximum frequency.
A Novel Approach for Shaded Moving Object Detection Based on Fuzzy Sets
Authors: Zhu Ming Feng
Published: January 2012

Research of moving object detection and tracking is an interesting subject in computer vision. To improve the accuracy of shaded moving object detection, this article introduced a novel method for shaded moving object detection. This method is based on fuzzy sets and establishes association between object’s color information and spatial information through fuzzy logic to detect moving object and remove the shadow of it. When utilizing this method to process indoor and outdoor image sequences with moving object, this method can accurately detect the moving object and remove the shadow of it. In comparison experiment, this method showed more accuracy and robustness.
Coding Algorithms of Aurora Image Compression Based on Wavelet Transformation
Authors: Wu Guang Li , Wu Zhen Sen , Han Shen Miao , Wu Guang Ling
Published: January 2012

This paper introduced some significant applications of aurora images, listed the main factors of choosing wavelet basis in image compression coding and analyzed the influence of aurora image compression effect caused by different wavelet basis were experimentally. The results of two kinds of significant wavelet transform algorithms EZW and SPIHT were analyzed, compared and also experimentally improved.
User Perception Related to Video Quality for Using as Network Selection Criterion to Vertical Handover
Authors: Valenzuela Gracieth , Ferreira Isac , Nóbrega Obionor , Cunha Paulo
Published: January 2012

With the multimedia traffic and of the heterogeneous networks also referred as (4G) grows the need to maintain the video quality perception by the final user. This work presents a mechanism to select the ideal network based on Quality of Experience (QoE) to a better video quality in vertical handover. The simulation results presents that the minimum PSNR value of the selected networks was 29dB, which shows the selection of efficient network.
A Secure Video Steganography Based on ECC and DCT
Authors: Wei Li Xian , Yang Peng , Yang Xiao Yuan
Published: January 2012

Video steganographic algorithm has the advantage of large hiding capacity, but we neglect the security when seek the capacity. In order to balance the two aspects, both to meet the high capacity of improving the load of video carrier and can safely protect the secret information. This paper presents the error-correcting code which can effectively correct burst errors and use it in video steganography. The secret information is hidden in error-correcting code first and then integrated the code with secret information with the video carrier’s DCT coefficients to insert the secret information in video carrier. The experiment results show that: this algorithm not only has great visual and statistical invisibility, also the safety of secret information is more significant. And achieve the objective of effective protect the secret information.
An Efficient Compressed Volume Rendering Algorithm Based on GPU
Authors: Zhao Li Ping , Fang Mei , Wei Yuan Wang
Published: January 2012

An efficient compressed volume rendering algorithm is presented. Firstly, the original volume data is compressed by a content-based classified hierarchical vector quantization algorithm. Secondly, the compressed volume data is then transferred to Graphic Processing Unit and decompressed in real time, subsequently, the decompressed data is rendered by a three-dimensional textures mapping method to accelerate the speed of rendering. Experimental results show that, in addition to reasonable fidelity and faster rendering speed, the presented algorithm can obtain multiple levels of detail on the off-the-shelf graphic hardware.
An Effective Visual System for Static Analysis of Source Code
Authors: Wan Ying , Tan Chuan Qi , Wang Zhi Gang , Wang Guo Qiang , Hong Xiao Jin
Published: January 2012

In the software development lifecycle, code static analysis takes an important part in building secure software. To help discover the potential security issues in source code, large numbers of static analysis tools are developed. But the results generated by them display in the form of pure text, so it is time-consuming for developers to analyze these text messages, and it is difficult for developers to concentrate on the most interesting defects in huge data. In this paper, we have developed a visualization system oriented to Java source code, which presents the results in graphics from a developer’s point of view, to help developers to analysis code defects. A novel layout is proposed to visualize software source code in a hierarchy way, which shows the physical structure of the software. A visual overview and powerful interaction is provided in this system which allows the developer to focus on the most pressing defects within huge volumes of source code.
Phase Related Current Differential Protection of Three-Terminal Transmission Lines
Authors: Li Bin , Luo Tao , Bo Zhi Qian
Published: January 2012

T-Type transmission lines are widely used in HV power system. The paper analyzes operation characteristics of fault component based traditional differential protection principles in the complex plane. The paper pointed out that there are some limitations for traditional principles in ensuring sensitivity of internal fault and reliability of external fault. Furthermore, the paper proposes a novel principle for T-type transmission line. Current phase differential phase is introduced into realization of current differential protection. Restraint unit of the proposed principle takes the role of drive and restraint respectively in the case of internal and external faults. Therefore, both the sensitivity and reliability of protection are improved significantly. At last, simulation tests show that the proposed principle is valid.
Research on WSNs Topology and Application of Lightning Monitoring in Distribution Lines
Authors: Wang Tie Liu , Shen Si Lei , Wang Jun Jie
Published: January 2012

Wireless Sensor Network (WSN) is used for such tasks as surveillance, widespread environmental sampling, security, and health monitoring widely. In this paper, a WSNs topology is proposed for lightning monitoring of distribution lines, which decides the number of nodes, routing protocol and power efficiency. The WSNs is deployed along the distribution line with nodes mounted on tall towers, which is used to monitor the lightning activities and accomplish fault diagnosis. At last, a monitoring system based on WSN is fabricated.
A Texture Synthesis Algorithm Based on SFLA-PSO and Block Increasing
Authors: Zhang You Sai , Gao Meng Qi
Published: January 2012

A texture synthesis algorithm based on SFLA-PSO and block increasing is presented for example-based synthesis. It can be used to speed up texture synthesizing through using the texture block of which size is increased by times of two during the process of texture synthesis; As the searching tactics of texture block matching, SFLA and PSO are combined to accelerate and improve the global searching performance. The experimental results prove that the algorithm can evidently accelerate texture synthesis on the premise of fine synthesis quality, and overcome the defect of easily falling into local optimal solution of PSO algorithm.
The Design of Queue System in an Embedded Platform
Authors: Feng An Song , Li Jian , Wang Qing Hui , Wei Li Feng
Published: January 2012

The design of the Queue-Based ARM development uses embedded technology to develop Windows CE-based ARM core platform Queue System. The Queue system can queue up calling number, customer evaluation, queuing information storage, queuing information tips and other functions. Call queuing function support repeat calls, priority calls, queues and merging functions; Customer evaluation function to support customers on operational staff operating results of evaluation; queuing information storage functions will queue information and customer evaluation information stored in back-end database. This design comparing with the market Queue System has the advantage of using an embedded operating platform. The host computer system is small. A new type of ACD (Automatic Call distributing) call end systems that support customer evaluation system is used with using embedded database to store data files. Data storage is more flexible.
IP Core Based Hardware Implementation of Multi-Layer Perceptrons on FPGAs: A Parallel Approach
Authors: Li Xiao Jun , Li Lin
Published: January 2012

There’re many models derived from the famous bio-inspired artificial neural network (ANN). Among them, multi-layer perceptron (MLP) is widely used as a universal function approximator. With the development of EDA and recent research work, we are able to use rapid and convenient method to generate hardware implementation of MLP on FPGAs through pre-designed IP cores. In the mean time, we focus on achieving the inherent parallelism of neural networks. In this paper, we firstly propose the hardware architecture of modular IP cores. Then, a parallel MLP is devised as an example. At last, some conclusions are made.
Fusion of Dynamic Traffic Information and Embedded GIS
Authors: Fan Shan Shan , Yang Dian Ge , Zhang Zhao Sheng , Li Ting , Lian Xiao Min
Published: January 2012

Dynamic traffic information is an important data for Intelligent Transportation System(ITS). Fusion of dynamic traffic information and embedded GIS is a basis for dynamic path planning and dynamic navigation. The approach proposed in this paper designed a model of dynamic traffic information and a hierarchical sub-model of road condition, and established algorithms for fusion with road network. Experiments with embedded GIS show that the models and integration algorithms are validated and effective. We believe the newly developed approach will be of great potential in ITS and future applications of dynamic traffic information.
The Design of Embedded Apparatus Based on Time-Triggered Scheduling Method
Authors: Wei Li Feng , Wang Yu , Liu Xiao Mei , Feng An Song
Published: January 2012

A device of petroleum asphalt’s characteristics measuring system was designed in this study. The differential auto-calibration voltage-frequency conversion technology with multi-benchmark resources was applied to measure the temperature. Time-triggered scheduling method was introduced into software design. The intelligent PID algorithm was used for controlling the change rate of temperature. These experiment results showed that the device had high measuring accuracy, and reliability and stability.
The Design of CIFF Structure Three-Order Switched-Capacitor Sigma-Delta Modulator
Authors: Han Jun , Wang Wei Dong
Published: January 2012

This paper presents the design and implementation of a single-loop three-order switched-capacitor sigma-delta modulator(SDM) with a standard 0.18um CMOS technology. A current optimization technique is utilized in proposed design to reduce the power of operational transconductance amplifier(OTA).Using a chain of Integrators with weighted feed-forward summation(CIFF) structure and optimized single-stage class-A OTA with positive feed-back to minimize the power consumption. The SDM has been presented with an over-sampling ratio of 128,clock frequency 6.144MHz,24kHz band- width, and achieves a peak SNR of 100dB,103dB dynamic range. The whole circuits consume 2.87mW from a single 1.8V supply voltage.
The Effects of Split Drag Flaps on Directional Motion of UiTM’s BWB UAV Baseline-II E-4: Investigation Based on CFD Approach
Authors: Mohamad Firdaus , Wirachman Wisnoe , Kuntjoro Wahyu , Nasir Rizal E M
Published: January 2012

This paper presents a study about split drag flaps as control surfaces to generate yawing motion of a blended wing body aircraft. These flaps are attached on UiTM’s Blended Wing Body (BWB) Unmanned Aerial Vehicle (UAV) Baseline-II E-4. Deflection of split drag flaps on one side of the wing will produce asymmetric drag force and, as consequences, yawing moment will be produced. The yawing moment produced will rotate the nose of the BWB toward the wing with deflected split drag flaps. The study has been carried out using Computational Fluid Dynamics to obtain aerodynamics data with respect to various sideslip angles (ß). The simulation is running at 0.1 Mach number or about 35 m/s. Results in terms of dimensionless coefficient such as drag coefficient (CD), side force coefficient (CS) and yawing moment coefficient (Cn) are used to observe the effects of split drag Subscript text flaps on the yawing moment. All the results obtained shows linear trends for all curves with respect to sideslip angles (ß).
Experimental Investigations on Thermal Performance of a Multi-Turn Closed Loop Pulsating Heat Pipe
Authors: Wang Yu , Li Wei Yi
Published: January 2012

Closed loop pulsating heat pipe (CLPHP) is a relatively new two-phase passive heat transfer device to suit present requirement of high heat flux dissipation in modern electronic components. The operating mechanism of CLPHP is not well understood and the present state of the technology cannot predict required design parameters for a given task. The aim of research work presented in this paper is to better understand thermal performance of CLPHP. A series of experimental investigation were conducted on a multi-turn CLPHP made of copper capillary tube of 2-mm inner diameter. Two kinds of working fluids viz. ethanol and acetone were employed. The influence characterization has been studied for the variation of heat input and filling ratio (FR) of the tested CLPHP. Thermal performance of the CLPHP is evaluated by heat transfer and thermal resistance. The results strongly demonstrate the effect of heat input and FR of the working fluid on thermal performance of the device.
Two-Wheeled Mobile Robot Tracking Based on Iterative Learning Control
Authors: Wang Wu , Chen Jing , Mao Lin
Published: January 2012

The discrete dynamic kinematics models of two-wheeled mobile robot was constructed and iterative learning control strategy was applied into this repeat motion plant, iterative learning controller for mobile robot was designed and the trajectory tracking algorithm was programmed, also the iterative learning control laws was designed and the ultimate simulation study manifest that learning operator can influence it’s iterative learning quality and if the control system unsatisfied with convergence condition, the system will unstable and position tracking divergent, otherwise, the robust control realized.
Study on the Reserve of China’s Professional Relief Workers under Frequent Natural Disasters
Authors: Jiang Zheng Ming , Wan Qing , Miao Jian Jun
Published: January 2012

To ascertain the optimal reserve of the professional relief workers in China, the author defines and optimizes the reserve cycle of the professional relief workers in this paper. Based on the analysis of the optimal personnel reserve in a single cycle, the author gains the short-term and long-term security personnel reserves as well as the relevant optimal personnel reserves, and then analyzes and introduces the factors to influence the optimal reserve and the corresponding adjustment methods.
Observability Analysis of SINS/GPS during In-Motion Alignment Using Singular Value Decomposition
Authors: Li Yao , Li Yong , Rizos Chris , Xu Xiao Su
Published: January 2012

The in-motion alignment of a SINS/GPS integrated system uses the GPS velocity and position as observations, hence the SINS position and velocity errors are instantaneously observable. However the attitude error is not directly observable, it is important to find a way to improve the observability of attitude error because the degree-of-observability of the attitude error affects the accuracy of alignment. In this paper, the singular value decomposition (SVD) method is used to analyze the degree-of-observability of SINS/GPS during in-motion alignment. Simulations involving nine typical maneuvers indicate that both the yaw-axis rotation and the accelerated motion can improve the degree-of-observability of attitude error. Of the nine types of maneuvers, the triaxial rotation with acceleration is the most effective maneuver for improving the degree-of-observability of a SINS/GPS integrated system.
The Detection for Image Spread Spectrum Watermarking Based on Self-Adaptive Wavelet Transform by DSP
Authors: Zhang Lian Jun
Published: January 2012

The relation between the digital watermarking and spread-spectrum is analyzed in this paper at the beginning. Then, a spread-spectrum adaptive digital watermarking scheme based on the wavelet transform is proposed and the system for this digital watermarking algorithm based on DSP is realized. Finally, a testing on the image digital watermarking processing system by DSP is conducted. The result from the testing approves that the system is flexible and can accomplish watermark embedding and detecting.
Influences of Corporate Governance on the Resources Allocation Efficiency of Securities Market
Authors: Yang Yun
Published: January 2012

As known to all, the securities market is an essential part of financial market, and also occupies an important position in the financial market system. However, the position and function of the securities market in the financial market are different in different social systems, economic foundations and cultural traditions. In this paper, the purpose is mainly discussing the influences of corporate governance on the resources allocation efficiency of the securities market, and then putting forward a set of strategies which are targeted at the improvements on both the corporate go-vernance and the resources allocation efficiency of the securities market. Therefore, this paper is assumed to possess both the realistic and guidance significances to a certain degree.
Research on Data Process of GPS in Road Surveying
Authors: Huang Wei Duo
Published: January 2012

In this paper, absorbing the domestic and foreign research results of GPS positioning technology, it is based on further GPS measurements in the highway engineering theory and methods in a systematic study of the GPS data processing process. It also introduces the high-precision GPS data processing software GAMIT. It also gives and analyzes the highway GPS data processing results from control measurements.
Study on Quasi-Orthogonal Space Time Block Code Based on Amplify-and-Forward Relay Networks
Authors: Zhang Xue Yi , Sun Jie
Published: January 2012

A kind of quasi-orthogonal space time block code for amplify-and-forward relay networks is analyzed in this paper. At the source, 4 single-antenna users transmit the quasi-orthogonal space time block code matrix. At the relay node, fast maximum-likelihood decoding algorithm is adopted and the decoded symbols are then encoded into quasi-orthogonal code which is transmitted through transmit antenna. At the destination, pair-wise decoding algorithm is utilized. Finally we compare the performance of the quasi-orthogonal space time block code in relay networks with that of the quasi-orthogonal space time block code in traditional communication system. Simulation results show that at the given BER of 10-3, the new code can provide about gain of 4dB and 1 dB comparing with that for the traditional quasi-orthogonal code, respectively. And at the given BER of 10-5, the new code can provide about gain of 4.6dB and 2.6dB comparing with that for the old quasi-orthogonal code, respectively.
A Novel Index to Voltage Collapse based on the System Physical Quantities
Authors: Sun Zhi Wei , Liu Xiao
Published: January 2012

This paper presents a new index to voltage collapse based on the system physical quantities such as nodes' voltages and injected powers.The index has a critical value. It is physically meaningful, varies smoothly when the system changes (i.e. does not exhibit discontinous changes on value for small system changes such as oLTCs´action). This new index does not need to build any models and not be limited with load patterns.Moreover it can be used to real time system monitoring because it can be easily calculated , and can alert operators to take appropriate actions. The simulate result is very promising.
Analysis of Different Approaches for Gun Ammunition to Hit Aerial Target
Authors: Shakarwal Anita , Kumar Anil , Uniyal Sunil
Published: January 2012

The role of fire control system is to orient the gun at proper position to hit the moving target accurately. Aim of this paper is to study the different approaches and to analyze the gun ammunition characteristics to hit the aerial target. The described approaches would help in the selection of killing range. These approaches have been implemented with the experimental data generated for guns. The experimental data has been analyzed for suitability of particular technique under different circumstances. This work contributes in prediction of firing angle that includes ballistic offset and lead angle above the angle of sight to engage a moving target from static tank.
Stereo Matching Algorithm Based on Detecting Feature Points
Authors: Xu Shuo Bo , Xu Di Shi , Fang Hua
Published: January 2012

A new method for solving the stereo matching problem in the presence of large occlusion is presented. This method for stereo matching and occlusion detection is based on searching disparity point. In this paper, we suppose that a pair of epipolar-line images is a projection of a group of piece-wise straight lines on the left and right images respective. Therefore the disparity curve corresponding to a pair of epipolar-line images may be approximated by a group of piece-wise straight lines. Then the key of solving disparity curve is how to get the “characteristic points” on the group of piece-wise straight lines. Based on this view, we fetched out the conception “disparity point”, and three kinds of special disparity points are correctly corresponding to the “characteristic point”. By analyzing intensity property of a disparity point and its neighbor points, an approach which combines stepwise hypothesis-verification strategy with three constraint conditions is devised to extract the candidate disparity points from the epipolar images.
Face Recognition Based on a Fast Kernel Discriminant Analysis Approach
Authors: Bian Lu Sha , Yao Yong Fang , Jing Xiao Yuan , Li Sheng , Man Jiang Yue , Sun Jie
Published: January 2012

The computational cost of kernel discrimination is usually higher than linear discrimination, making many kernel methods impractically slow. To overcome this disadvantage, several accelerated algorithms have been presented, which express kernel discriminant vectors using a part of mapped training samples that are selected by some criterions. However, they still need to calculate a large kernel matrix using all training samples, so they only save rather limited computing time. In this paper, we propose the fast and effective kernel discriminations based on the mapped mean samples (MMS). It calculates a small kernel matrix by constructing a few mean samples in input space, then expresses the kernel discriminant vectors using MMS. The proposed kernel approach is tested on the public AR and FERET face databases. Experimental results show that this approach is effective in both saving computing time and acquiring favorable recognition results.
Observer-Based Quantized Feedback Control via Noisy Communication Channels
Authors: Liu Qing Quan
Published: January 2012

This paper investigates the input and output quantized control problem for stochastic linear systems with unbounded and possibly non-Gaussian process disturbance, where sensors, controllers and plants are connected by a noisy digital communication channel. Due to the unbounded process disturbance, a dynamic, logarithmic quantization scheme is proposed. An observer-based control policy is presented to stabilize the unstable plant in the mean square sense. Simulation results show the validity of the proposed quantization and control policy.
A Framework to Monitor Vehicle Visualized and Intuitively Based on X3D
Authors: Hu Ji Hua , Tang Wei , Xie Hai Ying
Published: January 2012

Vehicle monitor becomes popular in china, but it is difficult to monitor vehicle runs in continuous Tri-dimensional Traffic Area. This paper supposes a vehicle monitor framework, which integrates X3D, XML with GPS, and it realizes vehicle movement model, to locate exactly which road a car run in, and to watch cars runs in TTA. The framework is proved to be feasible by test done in Guangzhou city of china, which can also be applied in traffic simulation and vehicle behavior analysis.
Significance of Mathematization of Philosophical Problems from the Angle of Broadspectrum Philosophy
Authors: Wang Xiao Gang
Published: January 2012

Whether philosophy can realize mathematization has long been controversial. As the mathematics develops a nonquantative branch- structural mathematics, however, mathematization of philosophy has a turnaround. Broadspectrum philosophy which makes use of structural mathematics has established a generally applicable as well as precise mathematical model for many philosophical problems, giving a positive answer to whether the philosophy can be mathematized. Mathematizaiton of philosophy allows more accurate and clear distinction of people’s expression in meaning, gives ideas the visible characteristics, makes philosophy an analyzable discipline, and realizes routinization of philosophical methods. Hegel was well versed in mathematics but opposed “Extreme Mathematic Attitude”, since he thought recognizing all the objects from the mathematic standpoint of “Quantity or Quantitative Relationship” would ignore the qualitative difference among the objects.［1］P239 Hegel’s opinion was based on the traditional mathematic which takes the Quantitative Relationship as the foundation. Holding the same evidence as Hegel's, most philosophers nowadays still suspect that the philosophy can be mathematized. When the modern mathematics has developed a new nonquantative branch, the Structural Mathematics, the philosophy mathematization, however, meets a turning point. Opposed to Quantitative Mathematics, the Structural Mathematics focuses on research of mathematic relationship and structure on the basis of abstract set theory. Since the structural mathematics doesn't rely on quantity and quantitative relationship, it can be combined in research of philosophy which usually doesn’t possess quantitative characteristics. Establishment of Broadspectrum Philosophy is a successful attempt. With full application of set theory, symbolic logic, modern algebra, transformation group theory and graph theory, Broadspectrum Philosophy constructs a generally applicable as well as precise mathematical mode for many philosophical problems, bringing a fundamental change to the philosophy. This paper attempts to make some preliminary analysis on the significance of establishment of Broadspectrum Philosophy.
Design and Implementation of Hydrological Monitoring System Based on Beacon-Enabled ZigBee Network
Authors: Zheng Gui Lin , Gao Yi Chuan
Published: January 2012

In order to cope with the existing shortcomings lie in hydrological monitoring areas, a novel hydrological monitoring system based on beacon-enabled ZigBee network is proposed in this paper. The designed monitoring system is made up of three parts: field collecting portion, field monitoring portion and remote service portion. The proposed data collecting station utilizes ZigBee for delivering field sensors' data to monitoring center, which is designed to collect, store, process and analyze the data and provide higher services to the hydrological department. The main idea about constructing a simple and effective beacon-enabled ZigBee network is presented. The improvement on Guaranteed Time Slot (GTS) assignment mechanism and low power consideration are also be involved. The practical results indicate the system is effective and reliable.
A Method of Choosing Important Features Used to Intrusion Detection System in Wireless Sensor Networks
Authors: Wang Shu , Sha Jia Xiang , Yu Gui Xiang , Yu Sheng Qin , Yu Sheng Chen
Published: January 2012

One of difficultest problem is to find these important features (namely, effective features) for intrusion detection system (IDS). In order to resolve the problem, a method is presented in the paper. The so-called important features are these features in which much information for IDS is provided. The information provided by a feature is measured by mean-squared error (namely, variance) of the feature. The correlativity between two features is measured by covariance. If the covariance is equal to zero, the two features are non-correlative. On condition that covariance is equal to zero, the new feature making the variance maximum is gained. The new feature is called first important features searched in the paper. In the same approach, the second, third … important features are gained. Tests show that the method developed in the article and IDS based on the important features sought in the method are useful and available.