bluuebunny/crossref_metadata_2025 huggingface dataset:
The Local Time Step Iterated Timing Analysis Algorithm for Circuit Simulation
Authors: Chen Chun Jung , Lee Chih Jen , Tsai Chang Lung , Yang Tai Ning , Chang Allen Y.
Published: January 2012

Relaxation-based algorithms are efficient in simulating large-scale circuits. One of the Relaxation-based algorithms, ITA (Iterated Timing Analysis), has even been widely used in industry. Hence we present accelerating techniques to fasten ITA’s speed. The basic idea is to let ITA utilize local time steps of subcircuits as much as possible. Our techniques include a heuristic approach, a method based on Strength of Signal Flow, and the method combining the previous two techniques. Proposed methods are quite advantageous, which have been justified by real experiments.
Weighted BA Scale-Free Random Graph Model
Authors: Chen Xin Yi
Published: January 2012

Systems as diverse as genetic networks or the World Wide Web are best described as networks with complex topology. A common property of many large networks is that the vertex connectivities follow a scale-free power-law distribution. This feature was found to be a consequence of three generic mechanisms: (i) networks expand continuously by the addition of new vertices, (ii) new vertex with different number edges of weighted selected that connected to different vertices in the system, and (iii) new vertices attach preferentially to sites that are already well connected. A model based on these three ingredients reproduces the observed stationary scale-free distributions, which indicates that the development of large networks is governed by robust self-organizing phenomena that go beyond the particulars of the individual systems.
Semi-Empirical Methods Prediction Noise from Free Supersonic Jets
Authors: Li Ai Qin
Published: January 2012

It is important to assess the effects of missile and rocket launching on the launcher health and surrounding structures. Since an accurate measurement of the launch noise environment is time consuming and extremely cost prohibitive. And nowadays, there is no reliable theoretical method. in order to calculate the sound field generated by high-speed high temperature jets. Therefore, engineering approaches are widely used in practice. In this paper considers semi-empirical jet noise models and their development and application. Listing of some the open questions and future directions concerning supersonic jet noise predictions using semi-empirical methods concludes the survey.
Study and Simulation on Photovoltaic Grid-Connected System
Authors: Ma Xiu Xiu , Xia Dong Wei , He Zhan Ning , Liu Yu Peng
Published: January 2012

Solar photovoltaic (PV) grid-connected generation represents the direction of solar energy’s development and it is the most attractive technology of energy utilization in the 21st century. This paper is focused on the PV system and makes simulations for it. The result represents its characteristic.
Design and Analysis of Digital Filter in Digital Down Converter
Authors: Xie Xiao Ming , Huang Hui Meng
Published: January 2012

In this paper, based on the analysis and discussion of multistage decimation structure, we have studied and analyzed some key technologies of the digital filter in digital down conversion. Meanwhile, we have analyzed and summarized the decimation filter modules as CIC, HB, FIR of the digital filter, and a multistage decimation filter design program is given in this paper. An optimum design method is proposed in this article, which greatly reduce the complexity of system design and memory usage and has upgrade the data rate operation with great extent.
Function-Oriented Risk Model for Engineering System
Authors: Zhou Wei Jing , Shen Huai Rong
Published: January 2012

Risk analysis is important to increase the reliability of engineering system. And an excellent model is the foundation. Traditional models are event-oriented so that it can’t describe the totality of the system. This paper introduces a function-oriented modeling approach-Goal Tree Success Tree and Master Logic Diagram. It provides a powerful functional/structural description and modeling method. It can represent the goals, the functions, the components and their interactions of the engineering system. So, it is a systemic modeling method for the risk analysis of engineering system. A case study of the servo mechanism of the launch vehicle shows that this approach can identify the key risk factors and the hidden risk factors. And it can trace the failure influence. It provides a systemic approach to risk analysis for researchers
The Analysis of the Simulation Model on Matlab of ip -iq Detection to Positive and Negative-Sequence on the Base of Voltage
Authors: Tian Wen Jun , Chen Xiao Qiang , Tian Min Xing
Published: January 2012

This paper introduces ¡p-¡q detection and analyzes the error in detecting the active and reactive current theoretically at the condition of three-phase and four-line at first. Then, it puts forward a new method at the base of ¡p-¡q detection. At last, on the base of MATLAB, the simulation of the new method is demonstrated to be correct and acceptable.
A New Single-Ended Fault Location Method Based on Bergeron Model
Authors: Xin Jian Bo , Lin Xiang Ning , Bo Zhi Qian
Published: January 2012

On EHV transmission lines, the impact of distributed capacitance is necessary to be considered in case of fault location. A novel fault location method for single-phase grounded fault of transmission lines is presented based on the distributed parameter model of transmission line. In this method only the voltage and current of single end is used. The residual phase voltage at the fault point should have the same phase angle as the current through fault branch due to the pure resistive characteristics of the fault path impedance. By virtue of searching the minimum phase angle differ-ence between the phase voltage along the transmission line and the fault-component current meas-ured at the side equipped with protection, the fault distance can be located. ATP simulations are used to generate data that are supplied as inputs to the fault location algorithm.
Some Results about Ruin Probability in the Second Type of Generalized Delayed Renewal Risk Model
Authors: Fang Shi Zu
Published: January 2012

In this paper we introduce the second type of generalized delayed renewal risk model and investigate its ruin probability. Under the assumption that the claim sizes are heavy-tailed, we obtain a tail equivalence relationship of the ruin probability and establish a local asymptotic relationship for the ruin probability.
Simulation of Engineering Structure’s Fluctuating Wind Velocity Based on the Linear Filter Method
Authors: Yu Yan Li , Huang An Ping , Wang Guo Bo
Published: January 2012

In the wind velocity simulation of large-span structure, it need to consider the relative characteristic of time and spatial in the same time. Based on the linear filter method, the program is design to simulate the spatial multi-nodes wind velocity time-history curve. The influence of different parameter value to simulation result is discussed. The parameter value is determined to the large-span structure simulation.
Thin CuInSi Film Deposited by Magnetron Co-Sputtering
Authors: Xie Jian Sheng , Li Jin Hua , Luan Ping
Published: January 2012

Thin CuInSi films have been prepared by magnetron co-sputtering, and followed by annealing in N2 atmosphere at different temperatures. The structures of CuInSi films were detected by X-ray diffraction(XRD); X-ray diffraction studies of the annealed films indicate the presence of CuInSi, In2O3 and other peaks. The morphology of the film surface was studied by SEM. The band gap has been estimated from the optical absorption studies and found to be about 1.40 eV, but changes with purity of CuInSi. CuInSi thin film is a potential absorber layer material applied in solar cells and photoelectric automatic control.
Fusion Algorithm for Multi-Gait of Hexapod Bionic Rescue Robot
Authors: Guan Rong Qiang , Liu Jun Yi , Liu Jun Ling
Published: January 2012

This paper mainly introduces a new kind of adaptive control hexapod bionic rescue robot. From the angle of bionics, hexapod robot’s gait algorithm which is based on hexapod cockroach is studied. It uses the adaptive control algorithm to convert hexapod robot's gait algorithms under the different circumstances and sets up D-H coordinate of robot’ssingle leg to analyze the single leg’s kinematics.
Application Research of Marine Engine Simulation Teaching Platform
Authors: Sun Pi Bo , Zhou Li Jiang , Zhang Bing
Published: January 2012

With the development of information technology for equipment investment, loss of large number of teaching support materials consumption experiments, the establishment of education system simulation, simulation laboratory teaching has become a hot issue. This article discusses the design of marine ships built control system and simulation platform. The platform can be used for ship turbines comprehensive experiment. It has integrated a variety of experimental features.
A Robust Posterior Method to Multiresponse Optimization Using the VIKOR Method
Authors: Kazemzadeh Reza Baradaran , Naseri Mohammad Reza Amin , Salmasnia Ali
Published: January 2012

Setting of process variables to meet a required specification of quality characteristic (or response variable) in a process is one of common problems in the process quality control. But generally there are more than one quality characteristics in the process. In these situations, to obtain a satisfactory compromise in such a case, a decision maker (DM)’s preference information about the tradeoffs among the responses should be considered. In some cases, it is difficult for a DM to express an explicit approximation of the preference function. Therefore it can be effective to allow the decision maker to choose from a set of solutions. To this end, an algorithm is used to determine a representation of the nondominated solutions set. Such methods incorporate a posterior articulation of preferences. This paper proposes a posterior method based on taguchi’s signal-to-noise (S/N) ratios to facilitate the preference articulation process and incorporate both systematic and random deviations from target in a single criterion. Finally, the VIKOR method is used to extract of optimal compromise solution that leads to minimum variation in relative deviations of responses.
Fuzzy Synthetic Estimation of Multi-Process Planning Schemes in CAPP
Authors: He Ji Lin , Yuan Zheng , Zou Xue Min
Published: January 2012

Aiming at the evalution and selection of multi-process plans in CAPP, a general kind of fuzzy comprehensive evalution is proposed according to the principle of fuzzy consistent relation and fuzzy consistent matrix and the correlation of gray system theory, and detailed evalution step is given. Three kind of the process plans are evaluated with the method of fuzzy comprehensive evaluation. The fuzzy synthetic estimation module is founded based on the product quality , manufacturing cost and production cycle. It has been adopted to cases in production and has realized the optimization of process schemes in CAPP.
Semi-Subsampled Contourlet Retrieval Algorithm Using Three Statistical Features
Authors: Liu Yu Xi , Chen Xin Wu
Published: January 2012

In order to improve the retrieval rate of contourlet transform retrieval system, a semi-subsampled contourlet transform based texture image retrieval system was proposed. In the system, the contourlet transform was constructed by non-subsampled Laplacian pyramid cascaded by critical subsampled directional filter banks, sub-bands standard deviation, absolute mean energy and kurtosis in semi-subsampled contourlet domain are cascaded to form feature vectors, and the similarity metric is Canberra distance. Experimental results on 109 brodatz texture images show that using the three cascaded features can lead to a higher retrieval rate than the combination of standard deviation and absolute mean which is most commonly used today under same dimension of feature vectors. Semi-subsampled contourlet transform based image retrieval system is superior to those of the original contourlet transform, non-subsampled contourlet system under the same system structure with same length of feature vectors, retrieval time and memory needed, decomposition structure parameters can also make significant effects on retrieval rates, especially scale number.
Integrated Navigation of Mobile Robot Based on Neural Network and Fault Detection
Authors: Wang Hong Mei , Zhang Ming Lu , Meng Guang Zhu
Published: January 2012

When global positioning system (GPS) signal outages, the integrated navigation accuracy of GPS and strap-down inertial navigation system (SINS) will decline with time, and even navigation system cannot work. To avoid this, a new design is introduced. When GPS works normally, square root filter estimates the errors of position, velocity and attitude and compensates the outputs of SINS. When GPS is out of order, back propagation neural network (BPNN) will take the place of GPS to calculate the error parameters, thus the accuracy of navigation will enhance. And in this paper, the unit of fault detection is added to detect whether GPS signal outages or not. The simulation results show the effectiveness of this method
A Research of BP Neural Network Based on Dynamics for Robot Manipulator
Authors: Zhou Bo
Published: January 2012

In this paper, a dynamics model basing on the BP algorithm is proposed. The algorithm that can enhance the performance of the adaptability is the combination of torque control and a compensation structure using ANN. Errors are inevitable while the modeling for dynamics of robot manipulator. But they can be compensated by the compensation structure of ANN. The result of simulation shows that the controller can get the performance of trajectory well and the structure of controller is feasible.
The Development and Realization of Exam System for VFP Language Course
Authors: Zhou Min
Published: January 2012

This is intended to promote the ability of solving problems of university students by using computer ,test the students’ master level of knowledge and ability of computer appliance scientifically and comprehensively. It designs and develops exam system of VFP language course on computer.
New VDCOL Control Strategy for Voltage Stability in Receiving-End Power Grid of DC System
Authors: Liu Xiao Ming , Liu Yutian
Published: January 2012

Voltage stability of AC/DC hybrid power grid is closely related to Voltage Dependent Current Order Limiter (VDCOL). The effects of VDCOL to voltage stability along with serious voltage reduction during or after faults are analyzed in detail. Considering that VDCOL with fixed parameters is difficult to adapt the complexity of operation conditions and ac faults in the receiving-end power grid of dc system, a kind of dynamic self-adaptive VDCOL control strategy is proposed based on the voltage of ac side of converter transformers at inverter side. Simulations of Shandong power grid of China show that the new type of VDCOL is beneficial to voltage stability of receiving-end power grid.
Way Point Based Deliberative Path Planner for Navigation
Authors: Lilla A. Daleel , Ragavan S. Veera , Ponnambalam S.G.
Published: January 2012

We present an Evolutionary Planning and Replanning Algorithm, capable of producing Bounded Suboptimal solutions in an Anytime fashion. Combining Genetic Algorithm with anytime approach is uncommon. Anytime Genetic algorithm combines the benefits of an Anytime and an Evolutionary Algorithm to efficiently provide solutions to complex, Dynamic Search Problems. The results appear promising for shorter horizon problems, while for large horizon the search tends to behave like a standard GA
The Study on Modern Art Design for Product Decoration Design
Authors: Wang Cui Fang
Published: January 2012

A new art design is not a pure style of design but a synthesis of many styles, and its form and theme of expression in product design are not absolutely the same. In this paper, a preliminary discussion on new art design is conducted. Due to a serious shortage of materials and the turning of manpower & machines to the manufacture of war-related products, designers had to focus on the practicality of products, as they could no longer find extra materials and manpower for decoration. At the same time, the new materials for wars were developed significantly, and gradually the modernism style emphasizing practicality and opposing decoration became the mainstream of design, and this style had been popular for nearly a century.
Quality of Service over Heterogeneous Network with MPLS Backbone
Authors: Mahmoud Omer , Anwar Farhat , Sellami Ali , Abdulla Aisha H.
Published: January 2012

Internet growth in recent years has encouraged many new applications to be provided for the end user. However, providing and maintaining high quality of service for these new applications is a challenging matter that is getting the attention of many many researchers nowadays. The QoS challenge is emanating from the diversity of these applications, in term of bandwidth requirements and high sensitivity to delay and delay variation. Three main architectures were proposed by IETF in an effort to make the IP QoS a reality. They are integrated services (Intserv), differentiated services (DiffServ) and multiprotocol label switching (MPLS). Sometimes perceived as competitor, these architectures are in fact complementary developments that approach the QoS challenge from different network perspectives. Thus these approaches can work together in a manner that provides a global QoS within Heterogeneous network. This paper aims to propose and discusses an improved admission control mechanism in order to achieve a global QoS in the HN Network. The proposed mechanism uses MPLS-TE tunnels at the core of Heterogeneous networks to maintain QoS for inter-domain flows and applications.
Course Ontology Construction of E-Learning
Authors: Cheng Xin Dang , Zhang Xin Gang , Liu Zhi Du
Published: January 2012

To solve the irregular, poor efficiency and lowly reusable of resource, a structured framework based on the course of e-Learning is proposed. The concept knowledge and assisted learning knowledge are combined with course architecture. Based on this framework, course ontology is built according to the method of software engineering and the idea of reusable is adapted. The class hierarchy and the relationship between class are analyzed, and the course of computer network is combined as an example to create an instance.
Establishing Secure Event Detection with Key Pair in Heterogeneous Wireless Sensor Network
Authors: Khandelwal Anil , Gupta Sanjeev , Mishra Ravi Shankar , Khandagre Yogeshver , Dubey Ashutosh K.
Published: January 2012

How to improve the efficiency with security with the extension of lifetime of sensor nodes is the interesting area in the field of Heterogeneous Wireless Sensor Network (WSN). Key management is also an important concept of any secure communication. Expiring secure connections cause that connectivity in network decrease. For decreasing effect of compromising a node on expiring secure connections. The heterogeneity among sensor nodes help provides scalability, notable energy efficiency and security benefits. The previous protocol uses both probabilistic key pre-distribution in the lower tier of the network architecture and public key cryptography in the upper tier to distribute session keys. We proposed a protocol for key establishment which provides a high level of security and minimizes the resource consumption of the sensor devices. This provide a better suited for heterogeneous environment when applied with sensor devices. Finally our proposed protocol is better in comparison from others by applying different simulators.
Balanced Clustering with Full Coverage in Heterogeneous Wireless Sensor Networks
Authors: Zargari Hamed , Chahardoli Mostafa , Shirmohammadi Mohammad Mehdi
Published: January 2012

This article is about to introduce a new balanced clustering protocol which improves cluster coverage in cluster based Wireless Sensor Network (WSNs). This protocol aims to reduce dissipated energy, increased network life time and data accuracy. Proposed algorithm divides sensing area into small parts. In every section one cluster head is selected base on LELE protocol. Simulation results show that the Balanced clustering with full coverage (BCFC) increase network lifetime, throughput and cluster coverage.
The Research of Algorithms for Fingerprint Characteristic Extraction and Matching
Authors: Zhang Zhen , Liu Li
Published: January 2012

Fingerprint recognition plays an important role in identification of organism characters. Automatic fingerprint identification system(AFIS)is a technology based on computer or microprocessor with advantages of convenience and high efficiency. The extraction and matching of fingerprint minutiae is a necessary step in automatic fingerprint recognition system. A set of algorithms for minutiae extraction and minutiae matching of fingerprint image are proposed in this paper based on the analysis of the inherent minutiae of fingerprint.
A Study of Velocity Distribution Impact of Wall Roughness on Ultrasonic Gas Flowmeter
Authors: Tang Feng , Li Yue Zhong , Guan Xiao Ming
Published: January 2012

In order to study the effects of velocity distribution of ultrasonic gas flow meter based on wall roughness, , a full developed turbulence model is established based on the theory of prandtl mixing length and flow loss coefficent λ has been calculated by using Colebrook friction correlation formula after analyzing time interval difference measuring method of ultrasonic flow meter. Through Matlab calculating and simulating velocity distribution in different conditions of wall roughness about the model shows and through Fluent simulating, velocity vector and pressure distribution in smooth and rough tube have been compared and analyzed. The experimental results shows that quantification of velocity distribution based on wall roughness can been solved with the model, and the analysis results have certain instructive significance to the development of ultrasonic gas flow meter.
Crosstalk Simulation Based on Full Wave S-Parameter Extraction Method between High-Speed Signals
Authors: Sun Hong Tao , Xie Shu Guo , Liu Yan , Chen Bang Jun
Published: January 2012

Crosstalk between high speed parallel bus signals is one of the most important signal integrity(SI) issues. In this article, a crosstalk simulation method based on full-wave scattering parameters extraction for transmission lines is researched. First, the coupling mechanism between transmission lines is analyzed using S-Parameter network theory and a fast frequency-domain method for crosstalk calculation is introduced. Then based on this method, some basic rules of crosstalk are studied in details and the method is validated by simulation results which agree well with those of RLGC model. At the end of this paper, a practical crosstalk simulation example between high speed data bus signals on a 8-layered printed circuit board is demonstrated step by step.
User-Defined Report Design and Implementation
Authors: Mou Dian Wen , Xu Zhen Zhong
Published: January 2012

Expound the report implementation of user-defined management information system (MIS) from the parts of system design, functional modules and system implementation. Meet the requirements that the report in user-defined MIS should be dynamic, flexible and user defined by using technologies of dynamic arrays and DataList in Visual Studio.net.
Design of Control System for Pavement Accelerated Loading Testing Equipment Based on Bus Technology
Authors: Guo Xing Yu , Zhang Peng , Feng Jin Xiang , Wang Xu Guang
Published: January 2012

In order to improve reliability of running and facility of data acquisition for the pavement accelerated loading testing equipment, simplify wiring and reduce fault rate, the analysis and design of control system and data acquisition system hardware and software for the pressure, speed, load times and otherwise are done. The distributed CAN Bus technique is used for control and data acquisition, which can collect data from many nodes for each parameter. After a number of laboratory and field experiment, the results show that high reliability of system running and precision, anti-interference of data acquisition are improved by the design of control system for pavement accelerated loading testing equipment based on CAN bus technology.
Parallel SAH Based KD Tree Construction Algorithm
Authors: Ma Cheng
Published: January 2012

The best method to construct a high quality KD tree is by using Surface Area Heuristic[1][4] (SAH). However, the computation involved in SAH is expensive. Wald and Havran[2] introduced a sequential algorithm of O(NlogN) complexity, which reached the lower bound of constructing a binary tree. In this paper, we will introduce a parallel SAH KD tree construction algorithm based on the O(NlogN) sequential algorithm. We proposed data structure for parallel constructing process which can minimize the communication among working threads, and a load balance strategy for evenly distributing work load. Our algorithm can achieve 4x speed up on 8-core CPUs architecture.
A Novel Blind Source Separation Method Based on the Extended Natural Gradient
Authors: Xue Yu Feng , Wang Yu Jia , Sun Qiu Dong
Published: January 2012

In this paper, a new method is introduced to derive the extended natural gradient, which was proposed by Lewicki and Sejnowski in [1]. However, they made their derivation under many approximations, and the proof is also very complicated. To give a more rigors mathematical proof for this gradient, the Lie group invariance property is introduced which makes the proof much easier and straightforward. In addition, an iterative algorithm through Newton's method is also given to estimate the sources efficiently. The results of the experiments confirm the efficiency of the proposed method.
Implementation of the Data Encryption Arithmetic of DES Basing on C Language
Authors: Zhong Cong Jiu , Zhang Zhi Xian
Published: January 2012

The system of DES being issued by ISO is a data encryption standard . After analyzing the arithmetic of DES , this article brings forward realizing DES using C language . passing circulation or iteration this article uses ordinary base arithmetic (for example , shift left, shift right ,addition of mode 2,etc an) and commutation (choice function , replace function) constructing the nonlinear transform of data stream (encipher commutation or decrypt commutation) to realize cryptogrammic protect for the data of computer. This article emphasize to introduce primary encipher course which is realized by C language.
Synthesis and Photocatalytic Performance of Pd/FeVO4 Composite Photocatalysts
Authors: Wang Min , Liu Qiong
Published: January 2012

Pd/FeVO4 composite photocatalysts were synthesized by the impregnation method.The as-prepared samples were characterized by X-ray diffraction(XRD), scanning electron microscopy(SEM).And the obtained samples were characterized by XRD, SEM and BET. The effect of Pd-loaded contents on their photocatalytic activity was studied by photocatalytic oxidation of methyl orange under 20 W UV light irradiation. The mechanism was also analysised. The results show that PdO can remarkably affect the photocatalytic activity.The photocatalyty activity of Pd-loaded FeVO4 was significantly enhanced and the decolorization rate of MO can be increased 27% more than that of pure FeVO4 sample when loading content is 3.5wt %.
The Design and Realization of Multifunctional Intelligent Terminal for Bank Customers
Authors: Yang Ming Xin , Song Wei , Wang Nan
Published: January 2012

In this paper, the design and implementation of multifunctional intelligent terminal in bank service based on SST89E58 are introduced. This terminal is an interactive interface composed of touch screen and LCD. It is capable to complete such functions as password input, service selection, account information inquiry, service evaluation, advertising display, etc. Therefore, it can conveniently and effectively help customers understand the whole transaction process, thus increasing the efficiency of bank transactions. In this paper, the principle of the system composition, the main hardware circuits and software design, and the software implementation of DES encryption algorithm have been described. And the design has been endowed with favorable practical value.
The Air Controlled Hydraulic System Design of 3201z-Type Dump Truck Lifting Mechanisms
Authors: Yan Tao Ping
Published: January 2012

3201Z-type dump truck is modification desiged by EQ3208GJ dump truck chassis which the technical performance parameters are known, and using a lifting mechanism of air controlled hydraulic system. By analyzing the composition and working principle of air controlled hydraulic system and referring to similar models, the design of the tank, the limiting mechanism and power taker are conducted. By calculating the main technical parameters, including in the performances of the hydraulic cylinder and the hydraulic pump, the dump truck's special oil cylinder HG-E180X780 and gear pump CBT-E563 are selected. By the stability of the piston rod, the system pressure and cars lifting time are checked, the reasonability and safty of the design can be proved.
Energy Evaluation of Highway Construction Using Neuro-Fuzzy Techniques
Authors: Thipparat Thoedtida
Published: January 2012

Most construction activities are carried out with heavy machinery. In the process of construction, energy is directly consumed by using construction machinery. Energy consumption of construction machinery can vary according to the scale, the deterioration of machinery, the difficulty of operating machinery, the ability of construction personnel to work, and the working condition. An approach for construction managers to assess the effect of these factors on the energy consumption is rarely deployed. Current methods depend mainly on the experience and subjective judgment of the project managers, who may be unfamiliar with the impact of these factors on energy consumption of construction machinery, and thus, often times produces inaccurate results. This paper presents a model that utilizes historical data and experts’ knowledge, and employs fuzzy set concept for assessing the factors having the impact on energy consumption of construction machinery. Based on the model, a fuzzy reasoning knowledge-based energy evaluating system is proposed. A case study involving highway construction projects implemented in two geographic areas with different working environments is presented to illustrate the salient features of the system that allows users to simulate experts’ judgment and to demonstrate the capability and effectiveness of the system that can assist contractors to better estimate energy consumption of construction machinery for highway construction projects.
Traffic Grooming in WDM Mesh Networks: A Light-Trail Implementation
Authors: Bhattacharya Sukanta , Jain Puneet , De Tanmay , Pal Ajit
Published: January 2012

In this work, we study the problem of efficient traffic grooming using light-trail. In case of lightpath a complete wavelength is dedicated between source and destination node. Once a lightpath is set up, the entire wavelength is used exclusively by the source-destination node pair. Data cannot be transmitted or received by nodes along the lightpath except the starting and ending node. However, it is often observed that the bandwidth requirement in today’s network is often varying and does not justify the need for allocating an entire wavelength for a single data transmission. Therefore, the wavelength capacity may be underutilized. Then the term light-trail came into existence, it was proposed to avoid the inability of intermediate nodes to use a connection wavelength. In this work, we have proposed a traffic grooming algorithm to maximize the network throughput for wavelength-routed mesh networks using static light-trail. The efficiency of our approach has been established through extensive simulation on different sets of traffic demands with different bandwidth granularities for different network topologies and compared the approach with existing algorithm.
Chiral Inorganic Solid Material Development
Authors: Min Liang , Xu Guo Liang , Liu Yi Min , Yao Wen Hua
Published: January 2012

After the invention of mesoporous, the chiral mesoporous materials had been regarded a hot research issue. Inspired by the chiral phenomenon, in this investigation, we presented several aspect of chiral mesoporous from its first appearance, especially stated the template that could be used to prepare chiral mesoporous, including chiral template and achiral template, besides, the different mechanism of some distinguished scientists’ works were introduced, and some application of these material were introduced such as catalyst, HPLC stationary phases and many other fields.
A Bivariate Model for Deman and Spot Price of Electricity
Authors: Green Hilary , Kordzakhia Nino , Thoplan Ruben
Published: January 2012

In this paper bivariate modelling methodology, solely applied to the spot price of electricity or demand for electricity in earlier studies, is extended to a bivariate process of spot price of electricity and demand for electricity. The suggested model accommodates common idiosyncrasies observed in deregulated electricity markets such as cyclical trends in price and demand for electricity, occurrence of extreme spikes in prices, and mean-reversion effect seen in settling of prices from extreme values to the mean level over a short period of time. The paper presents detailed statistical analysis of historical data of daily averages of electricity spot prices and corresponding demand for electricity. The data is obtained from the NSW section of Australian Energy Markets.
Implementation of Power Quality Event Detector on a FPGA-Based System
Authors: Liao Chiung Chou , Gu Ming Xuan
Published: January 2012

The discrete wavelet transform (DWT) technique has been proposed for detecting and localizing transient disturbance in the power systems. The disturbance is detected by comparing the transformed signal with an empirically-given threshold. However, as the signal under analysis contains noises, especially the white noise with flat spectrum, the threshold is difficult to give. Due to the nature of flat spectrum, a filter cannot just get rid of the noise without removing the significant disturbance signals together. To enhance the WT technique in processing the noise-riding signals, this paper proposes a noise-suppression algorithm. The abilities of the WT in detecting and localizing the disturbances can hence be restored. Finally, this paper employed the actual data obtained from the practical power systems of Taiwan Power Company (TPC) to validate by digital implementation on an FPGA-based digital device for real-time de-noising function of the monitored PQ DWT data.
IEC 61499 in Distributed Control of Weather Short-Term Load Forecasting Using Fuzzy Logic Algorithm
Authors: Sadeghi Maryam , Gholami Majid
Published: January 2012

Distributed Control System (DCS) equipping the new design methodology comprises an open architecture for intelligent and agile control of distributed control systems by developing a novel international standard “IEC 61499” evolving the event driven functional modules distributed to field devices and interconnected among multiple controllers. It is investigated for predicting the short term power demand using weather and ambient conditions such as temperature, humidity, season, wind and precipitation. Forecasting algorithm simulated via Function Block Development Kit (FBDK) using Fuzzy Logic Controller (FLC). FLC is an advanced method for prediction and control of nonlinear system which is based on fuzzy logic concept comprising an algorithms formulated by linguistically expert rules. Precise mathematical model free system, robustness and flexibility in the event of parameter variations are the most advantages of FLC. In this approach three distributed weather stations are defined for estimating the power demand in a small area using IEC 61499 DCS standard and FLC as a prediction logic. IEC 61499 intensifies flexibility by capability in adaption and system reconfiguration in regard of environment changes, results on cost reduction and diminutions the industrial automation complexity. It increasingly enlarges the adaptability of proposed control system, enhances the system portability, interoperability and develops configurability. IEC 61499 facilitates world trade by swooping technical barriers to trade, eventuates the neoteric markets and economic growth and leads to a strong trend towards distributed automation systems.
Path Loss through Pine Forest around Beach for Wireless Sea Wave Energy Sensor Network
Authors: Phaiboon Supachai , Seesaiprai Supanuch
Published: January 2012

This paper presents an empirical path loss model through forest for measuring sea wave energy using 2.4 GHz wireless sensor network (WSN). The empirical path loss model was determined from measurement campaign by using 18 dBm transmitter and the receivers with a low noise amplify. The conventional path loss models for forest environments were carried out such as Weissberger, ITU-R, COST 235 and Torrico models. From the results it is found that the proposed model provides a good agreement and is used for planning WSN.
Comprehensive Service Restoration Scheduling in Distribution System Using Apparent Impedance Based and Fuzzy Decision Algorithms
Authors: Kaewmanee Jutanon , Sirisumrannukul Somporn
Published: January 2012

The paper develops a tool to identify the fault type, the fault location, and an associated restoration procedure following a fault in a distribution system. These coupled tasks are important for electric power utilities to provide better services to their customers and to achieve a target reliability level. Fault type and fault location are identified by an apparent impedance-based method in which the linear relationship between the line impedance and distance is established. A service restoration with a number of objectives and constraints are solved by a fuzzy decision method. To demonstrate the effectiveness of the methodology, service restoration a large-scaled interconnected distribution system within the service area of Metropolitan Electricity Authority (MEA) is demonstrated. It found that, following a fault event, the fault type, the fault location and a proper restoration plan can be reached very efficiently and therefore provide valuable information decision support and flexibility to distribution system operators for restoration scheduling of distribution systems.
DV-Hop Localization Algorithm Based on Distance Geometry Constrain
Authors: Zheng Jun Gang , Wu Cheng Dong , Chu Hao , Xu Yang
Published: January 2012

Node localization is one of the key technologies in wireless sensor networks,DV-Hop algorithm is wildly usded .The main DV-Hop localization error is the distance between unknown nodes ande anchor nodes.In this paper, The distance geometry constrain in two-dimensional space has been applied to reduce the error of measurement ,which is the distance between unknown nodes and anchor nodes. Simulation results show that this localization algorithm is effective ,which improves the positioning accuracy.
Studies on an Integrated Navigation Method on the Basis of Adaptive Neuro-Fuzzy Inference System
Authors: Gao Qiang , Jin Shan , Wang Tie Liu
Published: January 2012

The GPS / INS integrated navigation system performance will significantly decrease during GPS outages. In this paper, we study an new integrated navigation algorithm based on Adaptive Neural- fuzzy Inference System (ANFIS). The algorithm adopted Kalman filter with pseudo-range and pseudo-range rate observations when the number of GPS satellites was not less 4. Otherwise, ANFIS was used to estimate the navigation errors and restrain the increasing INS errors to achieve integrated navigation. The new algorithm can improve the performance of integrated system effectively and enhance the horizontal position accuracy than traditional tight integration algorithms. Especially, the method is applicable to the complex work environment of navigation systems of ships.
Investigation on Free Vibration of Buckled Beams
Authors: Tsai Ming Hsu , Lin Wen Yi , Hsiao Kuo Mo , Fujii Fu Mio
Published: January 2012

The objective of this study is to investigate the deformed configuration and free vibration around the deformed configuration of clamped buckled beams by co-rotational finite element formulation. The principle of virtual work, d'Alembert principle and the consistent second order linearization of the nonlinear beam theory are used to derive the element equations in current element coordinates. The governing equations for linear vibration are obtained by the first order Taylor series expansion of the equation of motion at the static equilibrium position of the buckled beam. Numerical examples are studied to investigate the natural frequencies of clamped buckled beams with different slenderness ratios under different axial compression.
LQG Output Feedback Control of Multi-Rate Networked Control Systems
Authors: Liu Hong Li , Zhu Qi Xin , Wang Yan Ping
Published: January 2012

Networked control systems with single-rate mode means the sampling periods of sensor, controller and actuator are the same. Networked control systems with multi-rate mode means the sampling periods of sensor, controller and actuator are not the same. Networked control systems with single-rate mode are called single-rate networked control systems; networked control systems with multi-rate mode are called multi-rate networked control systems. The optimal estimator and LQG output feedback controller of multi-rate linear networked control systems are presented when the system has partial state information. The LQG output feedback controllers are proved to render corresponding closed-loop networked control systems exponentially mean square stable on some wild conditions. The separation theorem is proved to still hold in such multi-rate networked control systems.
Methyl Orange Photoelectrocatalytic Degradation Using Porous TiO2 Film Electrode in NaH2PO4 Solution
Authors: Zhang Wen Jie , Li Ke Xin , Bai Jia Wei
Published: January 2012

Porous TiO2 film was prepared by a sol-gel method using PEG1000 as pore forming template. The porous film and normal film were used as electrodes in a photoelectrocatalytic reactor. The functions of applied potential and concentration of NaH2PO4 to the photoelectrocatalytic degradation process of methyl orange were investigated. The results show that methyl orange cannot be degraded solely by the applied potential. Under the applied potential of 2 V, 49.9% of the initial dye can be removed on the normal TiO2 film electrode, which is much better than the 31.1% removal rate on the porous TiO2 film electrode. The normal TiO2 film electrode has better performance than the porous TiO2 film in the whole NaH2PO4 concentration range. After 80 min of reaction, degradation rate is 93.7% on the normal TiO2 film electrode. After 100 min of reaction, degradation rate is 89.7% on the porous TiO2 film electrode.
Research on Noise Simulation of Infrared Detector
Authors: Lou Shu Li , Han Yan Li , Ren Jian Cun , Yuan Xiao Hu , Zhou Xiao Dong
Published: January 2012

Noises of infrared detector have an important influence on sensitivity of infrared imaging system, and it affect the imaging quality and performance of infrared system. Research on noises of infrared detector is a challenging topic in designing, simulating and evaluating of infrared imaging system. All kinds of noises are studied in detail, and mathematical models are built. The method of simulating noises of detector is proposed, and noises are simulated based on the mathematical model.
An Improved Graph-Based Depth-First Algorithm and Dijkstra Algorithm Program of Police Patrol
Authors: Tie Chun Hua , Shen Yan Chun
Published: January 2012

The urban road network is abstracted as a directed graph in this paper，according to the theory of graph theory. It uses depth-first traversal algorithm of graph，and combining with Dijkstra shortest path algorithm，futhermore ,these two algorithms are improved，so that , the model of this regional division are built which on city roads for patrol’s police Alarm practical speed and distance as the verification conditions，we propose an efficient program for the city police patrol.
Research on Rotation Direction of Single-Axis Rotation FOG SINS
Authors: Shang Song Tian , Gao Wen Shao
Published: January 2012

Rotation direction of single-axis rotation SINS is researched in this paper. The two aspects: one-way, positive and negative rotation and clockwise, counterclockwise rotation are deeply analyzed respectively, and experimental verification is also taken. The results show that: FOG-based single-axis SINS should rotate with the positive and negative rotation way. It has a significant meaning to the engineering application of this technology.
Design of Real-Time Lossless Compression System Based on DSP and FPGA
Authors: Zhan Jian Hu , Liu Wen Yi
Published: January 2012

The application of the lossless data compression technology in the filed of telemetry system is discussed in this paper. Based on the ARC algorithm, a real-time lossless data compression technology is proposed. By combining the TMS320C6416 and XC3S200AN FPGA, this paper designs a real-time lossless data compression device hardware system. 2048 bytes of some telemetry noise data can be compressed in 5.64ms in this system and the compression removal rate reaches 78%. What’s more, the system has solved the problem of data capacity and speed during the process of data compression , which greatly improves the efficiency of data compression.
Wireless Sensor Network for Remote Monitoring and Trouble Shooting
Authors: Sheng Hong Yu , Sun Xiao Lei , Wan Dong , Wang Yue Yue
Published: January 2012

The article studies the wireless sensor network technology, using its features and functionality such as low-power, self-organization of networks and short-distance wireless transmission, integrating sensor technology, embedded computing technology, distributed data processing technology and telecommunication technology to transmit sample data into terminals. It solved the cost and the on-site maintenance problems in the wired sensor solution, and the high cost, high energy consumption, low stability and short lifespan problems in the sensor nodes under high-pressure en-vironment. By introducing two project cases including the application in the drug storage in Beijing Double-Crane Pharmaceutical Co., Ltd and the application in temperature control of high-voltage bus bars and high-voltage switches, the article analyses the application of wireless sensor network technology in remote monitoring and trouble shooting and its outlook, but providing the most straightforward and reliable data evidence for corporation steering committee and executives to mi-nimize risks and accidents. It is proved that the research results have significant practical value.
Research of Mobile IPv6 Switch
Authors: Li Gong Yan , Zhang Li Cai , Xu Jie
Published: January 2012

Traditional mobile IPv6 switching will produce transmission delay,to the mobile communication a great deal of trouble. This switching protocol in mobile IPv6 based on the three improved switching protocol,By the four sides of switching delay、data loss,、signaling load、Complexity to compare,get the most appropriate mobile switching technology.
Delay-Dependent Robust Passive Control for Uncertain Discrete Singular Systems with Multiple Time-Delays
Authors: Tang Shu Hong , Meng Bo , Gao Cun Chen
Published: January 2012

This paper investigates delay-dependent robust passive analysis and control for uncertain discrete singular system with multiple time-delays. Delay-dependent robust passive sufficient condition in terms of linear matrix inequalities (LMI) for the discrete singular systems is obtained by employing Lyapunov-Krasovskii approach and free weighting matrix technique. Based on this condition, a delay-dependent robust passive controller is presented which guarantees the resultant closed-loop system to be regular, casual, stable and robust passive. A numerical example is provided to demonstrate the effectiveness of the method.