bluuebunny/crossref_metadata_2025 huggingface dataset:
Identify Moving Noise with Array Signal and MVDR
Authors: Hao Peng , Kong Fan Zhong , Zheng Si Fa , Lian Xiao Min
Published: February 2011

Using microphone array and beam-forming is an important technology to identify moving noises sources. Capon minimum variation distortion-less response is used proposed to identify the complex noise sources, where many closely distributed noise sources are located nearby. The algorithm is introduced with detail. The identify results is simulated and analyzed with real running vehicle. Comparing the results between common beam forming and Capon method, it shows the Capon minimum variation distortion-less response method has higher resolution and could identify the complex noise distribution of moving vehicles.
Improved Design and Analysis of Hydraulic Impact Hammer Based on Virtual Prototype Technology
Authors: Yang Guo Ping , Chen Bo , Gao Jun Hao
Published: February 2011

The impact mechanism of the traditional hydraulic hammer is composed of the directional control valve and the main cylinder body. Due to the two parts damaged in different situation at work, the replacement of equipment resulted in unnecessary waste. Based on the design concept of virtual prototype technology, the virtual prototype model of improved hydraulic impactor was established with CATIA software and the directional control valve separated from the main cylinder body, in addition, the kinematics properties of the hydraulic impactor were simulated and analyzed by the dynamic simulation function of CATIA. The virtual prototype technology can reduce the input for the mock-up and Prototype, shorten the development cycle of the products and it is conducive to realize the optimal design or deformation design of products.
Influences of Rail Expansion Joint on Jointless Turnout on Ballasted Continuous Beam Bridge
Authors: Chen Rong , Ping Wang , Wang Bin
Published: February 2011

Based on turnout/bridge interaction principle and finite element method (FEM), an integrated turnout/beam/pier model of jointless turnout on ballasted track was established to analyze the influences of expansion joint on stress and deformation of the turnout. The results are concluded as follows: whether the rail expansion joint is set in front of or behind the turnout, expansion additional force of stock rail will be reduced greatly at the end of the beam; so do the expansion displacement of switch rail and nose rail, the stress of displacement restrictor and spacer block, rail break gap and the longitudinal force of one rail after the other rail broke. But when the expansion joint is set in front of the turnout, the pier’s longitudinal force of continuous beam bridge and the simply supported beam bridge (within the expansion range of the device) increase greatly. When the device is close to the turnout, longitudinal relative displacement of the stock rail to the girder also increases a lot. By comparison, it is more favorable to set the expansion joint behind the turnout, or to set the device at the both ends of the continuous beam, or to set the device at the ends of continuous beam rather than in the center of the span.
Intelligent Dynamic Roughness Identification Model in Grinding
Authors: Ding Ning , Zhang Ding Tong , He Ye
Published: February 2011

In this paper, first, the relation between roughness and grinding parameters is built. Then, an intelligent dynamic identification model of surface roughness is developed, which bases on the theory of roughness during grinding and the theory of fuzzy-neural network. The inputs for the model are the grinding parameters. Besides, an accelerometer is used to gather the dynamic vibration signal in real time. The model was used in the external cylindrical grinding experiment, and the result verified that the proposed model was feasible.
Intelligent Learning Ant Colony Algorithm
Authors: Ma Jian Hua , Tian Fa Zhong
Published: February 2011

Ant colony algorithm is effective algorithm for NP-hard problems, but it also tends to mature early as other evolutionary algorithms. One improvement method of ant colony algorithm is studied in this paper. Intelligent learning ant colony algorithm with the pheromone difference and positive-negative learning mechanism is brought forward to solve TSP. The basic approach of ant colony algorithm is introduced firstly, then we introduced the individual pheromone matrix and positive-negative learning mechanism into ant colony algorithm. Next the steps of intelligent learning ant colony algorithm are given. At last the effectiveness of this algorithm is proved by random numerical examples and typical numerical examples. It is also proved that intelligent ant and learning mechanism will affect concentration degree of pheromone.
Intelligent Plant Design of Complex Landform Long Distance Pipeline Transport of Iron Concentrate
Authors: Wu Jian De , Wang Hua , Fan Yu Gang , Wang Xiao Dong
Published: February 2011

Under the premise of transportation inconvenient, reducing pollution and environmental protection, iron concentrate pipeline transportation developing rapidly. However, due to pipeline related to fluid mechanics, solid-liquid two-phase flow, rheology, and other subjects, many scientific problems are still not resolved. Because of these problems, a further study on running control, security management, and optimize operations of pipeline transportation are needed, ensuring pipeline security, stability and efficient running. Intelligent plant design of pipeline transportation presents in this paper, taking intelligent data integration technologies, holding real-time data, running conditions of pipeline transportation and equipment, devices modeling integrated into a platform, achieving optimal scheduling, the goal of intelligent scheduling, as a result it can improve the management level, achieve energy conservation, improve production efficiency.
Large Deformation and Discontinuous Yield Analysis of Rotating Disks by Abaqus Softwares
Authors: Hu Shao Wei
Published: February 2011

Rotating discs are used widely as important structural elements in mechanical engineering. In order to obtain an optimal structural design, it is necessary to estimate the angular velocity and the stress distribution of a rotating disc in fully plastic state. So Large deformation and discontinuous yield analysis of rotating disks were analyzed by ABAQUS. Moreover, continuous yield, buckling and bifurcation analysis of rotating disk with discontinuous yield were studied. Then, Minidisk model is analyzed using ABAQUS.
Mammographic Feature Enhancement by Curvelet Transform
Authors: Xue Qin , Yan Zhuang Zhi , Wang Sheng Qian
Published: February 2011

This paper presents an approach for digital mammograms enhancement using curvelet transform. The curvelet transform breaks the limitation of the wavelet transform and provides efficient representation of smooth objects with discontinuities along curves. It has special micro-local features which make them especially adapted to the contrast enhancement of mammographic features. A kind of nonlinear enhancing function is applied to enhance the details of mammogram according to the importance of the curvelet coefficients from different scales and angles. Results show the technique is potential to improve the accuracy of cancer breast detection.
Measurement and Analysis of the Leakage Current on the Surface of Polluted Suspension Ceramic Insulator
Authors: Shi Yan , Jiang Xing Liang , Wan Qi Fa , Wu Xiong , Xu Tao
Published: February 2011

The artificial pollution tests are implemented on an IEC standard suspension insulator, and the leakage current waveforms and frequency characteristics were investigated under different equivalent salt deposit density ESDD and relative humidity. It was found that the peak values of the leakage current, the total harmonic distortion (THD) and the odd order harmonic components, e.g. 150 and 650Hz, were significantly correlated with the contamination condition of the insulator surfaces. Besides, a new characteristic parameter IMR，defined as the product of the peak values of leakage current by the ratio of the 3rd order harmonic components to the 13th order harmonic components, is introduced to evaluate the contamination condition on the insulator surface.
A New Hazard Identification Method-State Transition Graph
Authors: Hu Min , Wu Fang Fang , Zhu Bo , Lu Bo , Pu Jing Lei
Published: February 2011

It is important and difficult to identify the Hazard before a disaster happen because disaster often happens suddenly. This paper proposes a new method – State Transition Graph, which based on visual data space reconstruction, to identify hazard. The change process of the system state movement from one state to another in a certain period is described by some state transition graphs. The system state, which is safe or hazard, could be distinguished by its state transition graphs. This paper conducted experiments on single-dimension and multi-dimension benchmark data to prove the new method is effectiveness. Especially the result of stimulation experiments, based on the Yangtze River tunnel engineering data, showed that state transition graph identifies hazard easily and has better performances than other method. The State transition graph method is worth further researching.
Modeling Rate-Dependent Hysteresis for GMA Using Online Least Squares Support Vector Machines
Authors: Guo Zhen Kai , Song Zhao Qing , Wei Xin Jiang
Published: February 2011

Rate-dependent hysteresis is a strongly nonlinear phenomenon which exists in the giant magnetostrictive actuator (GMA); it has influence in the precision and stability of active vibration control. It is highly important in the control theory and control engineering that the influence of hysteresis is eliminated by the modeling of rate-dependent hysteresis for GMA. So an online intelligent modeling method, which is based on an improved online least squares support vector machines (IOLS-SVM), is presented for identifying rate-dependent hysteresis nonlinearity for GMA, and is used to online real-time training. The data measured in the experiment are used for modeling. The numerical simulation shows the effectiveness of the method.
On Synchronous Balancing System of Huge-Scale Hydraulic Press’s Moving Beam Based on Fuzzy Self-Tuning PID Controller
Authors: Zhou Yu Cai , Liu Shao Jun , Huang Ming Hui , Deng Yi , Duan Jun
Published: February 2011

The dynamic model of the synchronous balancing system of huge-scale hydraulic press was set up based on analyzing of force acted on 800MN huge scale hydraulic press’s moving beam .A self-tuning PID controller was designed and simulated by using the MATLAB fuzzy logic too1．The simulation result shows that it is very effective to overcome the eccentric load and parameter variety ,in additon ,in order to check the real control efficency , The related experiments were carried on the 315T experimental test special-purpose press as well as simulation anylyzing ,which was built for 800MN huge scale hydraulic press’s design and anylyzing.The results both show that the hydraulic press’s synchronization system with the fuzzy self-tuning PID controller has a slight overshoot，rapid response and high accuracy.
On the Study of Automatic NC-Code Programming Based on DXF Files
Authors: Shi Rui Hang , Luo Lei , Yao Zhen Qiang
Published: February 2011

In this paper, a method of automatic NC code programming is studied. The data structure used to store graph information is the base of automatic programming system. By utilizing the object-oriented tree data structure proposed in the paper, the disadvantages of the method caused by using simple data structures can be overcome. In processing information, the judgment of topological relationship between two outlines is very important. The Loop Extremum Method is easy, convenient and with no limitations. The system adds plenty of technological parameters, provides multiple machining patterns. In the end, an example is given to test and verify the system`s functions.
Online Monitoring ICE Powers Based on the Crankshaft Angular Vibration
Authors: Hua Chun Rong , Dong Da Wei , Yan Bing , Xu Ming Heng
Published: February 2011

A new method of online monitoring ICE powers based on the crankshaft angular vibration is proposed. It has deduced that when each cylinder works uniformly at a certain rotating speed, and the vth order angular vibration mode of crankshaft nears plane vibration mode such as “quasi-rigid body model” or “quasi-trapeziform model”, so a cubic polynomial can represent the relationship between the vth order angular vibration displacement amplitude of the crankshaft reference point and the engine powers, thereby the angular vibration of reference point could be used to online monitor engine powers. Through the simulation and experimental researches on a 6240 and a 4100 diesel engine, it shows that the engine powers fitted with the angular vibration displacement amplitudes of reference point are close to the measured or theoretical powers comparatively, and the maximum errors is only 2.95%, which verifies the feasibility and practicability of the method consequently.
Optimal Design of Integral Steering Linkage Based on Matlab/Simulink
Authors: Chen Wen , Guo Rong Chun
Published: February 2011

The integral steering linkage is the key part on vehicle, which can ensure the Ackerman steer angle when steering. in this paper, The mathematical model of the Ackerman steering linkage is established. The author introduces the optimal design program for the Ackerman steering linkage with MATLAB optimtoolbox. With the program, users can obtain optimized calculating results by inputting basic structural parameters. Actual output angle and expected input angle curves variation with input angle is automatically drawn so as to facilitate users for analysis, comparison and selection. The proposed method is accurate and efficient to design the splitting Ackerman steering linkage.
Optimized Designing for Structure of Ball Screw Recycling Tunel
Authors: Song Xian Chun , Tang Wen Cheng , Jiang Hong Kui , Rong Bo Song , Zhou Hong Bin , Li Bao Min , Zhu Ji Sheng , Wang Zhi Min
Published: February 2011

In order to improve the load condition of the balls in the returner,a dynamic model for the balls moving through the ball-recycling tunel is established after a analysis on the kinetical geometry bounds for the balls.A program is setup in Matlab,according to the Runge-Kutta formula.And the radius of the ball-recycling tunel track of the returner ,which is being used by Jining Bote , is optimized computed in this program.It is estified that t he improved returner make the friction torq of the ball screw lower and stablizer.
Photocatalytic Activity of TiO2 Loaded on HZSM-5 Zeolite Treated with Phosphoric Acid
Authors: Liu Chun Ling , Yu Yang , Zhang Wen Jie
Published: February 2011

HZSM-5 zeolite was prepared by treating of NaZSM-5 with phosphoric acid and used as support for TiO2 prepared by sol-gel method. Adsorption and photocatalytic activity of the zeolite, adsorption ability of the loaded TiO2, and the optimum TiO2 loading amount were studied. The maximum methyl orange adsorption rate was less than 1% in the range of HZSM-5 dosage from 0.01 g up to 0.07 g. After 30 min of irradiation, the photocatalytic activity of HZSM-5 under UV irradiation was only between 1.5% and 2.7%. Methyl orange reached its adsorption equilibrium after 20 min under stirring. Total adsorption on the supported material was less than 2% after adsorption equilibrium. The TiO2 loaded on HZSM-5 treated with 0.2 mol/l phosphoric acid presented the optimum activity. The TiO2/HZSM-5 photocatalyst loaded on HZSM-5 treated with 0.2 mol/l aqueous H3PO4 solution could remove 93% of the initial methyl orange after 2 h.
Precise Control of Thrust Force on the Shield Tunneling Machine
Authors: Duan Xiao Ming , Xie Hai Bo , Liu Zhi Bin , Yang Hua Yong , Gong Guo Fang
Published: February 2011

Hydraulic thrust system is a critical part of shield tunneling machine. The precise control of the thrust force is a significant task of thrust system during tunneling excavation. In this paper, an operation principle of the hydraulic thrust system test rig is illustrated. Taking into account the variable deadband nonlinear characteristics of proportional relief valve which is used for regulating the thrust pressure, several compensation control strategies are adopted to achieve the precise control of thrust force. Analysis and comparison which bases on simulation and experiment is done at last. The result shows that Fuzzy control can both eliminate the error and reduce the adjustment time which can basically meet the requirement of practical tunnel excavation.
A New Method of Mining Affective Transition Law
Authors: He Tong , Jia Shang Hui
Published: February 2011

According to the affective model based on rough sets and by combining with rough graph theory, this paper presents a new method to mine affective transition law. This method is a graph structure analysis method of analyzing algebra relationships among rough sets. Simulation shows that the new method is reasonable.
Preparation of Silicon Reinforced Poplar Wood Composites and their Thermal Properties
Authors: Qing Yan , Wu Yi Qiang , Yao Chun Hua
Published: February 2011

Silicon compounds as reinforcement agents in wood modification have an increase improvement in durability, dimension-stability and photostability, fire resistance, and certain mechanical properties such as surface hardness, tensile strength. Two kinds of silicon compounds reinforced poplar wood composites were fabrication by sol-gel and dipping silicasol respectively. The thermal properties of these materials were conducted by TG, and thermokinetic models and equations in process of pyrolysis were established by Doyle calculation. Results show that wood based composites with improved fire resistance were well fabricated, and temperature scopes of thermal pyrolysis of these composites were decreased from 420 °Cto 380°C compared with poplar wood, but activation energies increased from 322.8 kJ•mol-1 to 421.1 kJ•mol-1. Wood substrate was protected for introduction of silinon compounds in certain degree.
Quantitative Analysis for Near-Field Characteristics of Converter Circuits
Authors: Zhang Wei
Published: February 2011

With the electric power industrial development, electric power device was abroad using as the core of switch converter. For a clear near-field characterization quantitative electromagnetic interference of converter circuits, this paper applied finite element method to analyze a Boost circuit. Transform topology structure of circuit and build corresponding entity finite element modeling. Quantitative analysis for different topology structure electromagnetic distributing and near-field characteristics, and it become clear that the distribution and the role of electromagnetic field of the circuit through the results. The objective of the analysis is to provide the principle and put a new way for the Layout and component design of the power electronic circuits, at the same time above research works make a foundation for further studying EMI problem of the power electronic devices and are of academically and application worthiness.
Reliability Evaluation in Modern Urban Distribution Considering Islands Impacts
Authors: Chen Qian , Li Xiao Li , Zhang Jian Hua
Published: February 2011

A growing number of distributed generators have been connected to urban distribution networks in recent years, which brings great challenges to the traditional reliability evaluation of the distribution grids. Island is a new kind of operation mode of the city grid. In consideration of the importance factor of system load, establish the model of island taking the maximum equivalent workload capacity as objective function and heuristic search technology is proposed to solve the problem. According to the island mode of operation, assess the reliability of the network with islands based on equivalent resistance and minimal path, which have certain instructive significance to the improvement of reliability of the modern urban distribution nets.
Reseach and Implementation of Packet Capture Based on Multi-Core Binding Technology in Linux Environment
Authors: Sun Jiang , Lan Ju Long , Li Yu Feng
Published: February 2011

According to zero-copy idea and the application of multi-core binding to realize a high-performance packet capture platform based on multi-core binding(MCPCP).By modifying the memory management mode about sk_buff in kernel,realize the user space program to directly access the data packet, which is a kind of universal significance of the zero-copy scheme. And then through the multi-core binding technique, for each CPU core scheduling and control, with multi-threaded user programs can minimize the cache jitter to improve the efficiency of packet capture. Experiments show that in the case of low-end configuration, the throughputs of MCPCP for 64Byte and 1500Byte messages are 620 ,000pps (about 320Mbps) and 78,000pps (about 941Mbps) respectively. In the high-end configuration, can reach 1.46 million pps (748Mbps) and 81,000 pps (979Mbps).MCPCP surpasses the traditional ones' in performance.
Research on Aeroengine Rub-Impact Fault Analysis Based on Wavelet Scalogram Statistical Feature
Authors: Wu Ya Hui , Zhang Da Zhi , Li Xin Liang , Xue Jing Feng
Published: February 2011

The characteristics of the continuous wavelet transform scalogram of the aeroengine vibration signal could show the fault symptomatic in the 2-dimensional space and identify the rub-impact fault of the aeroengine. In order to get the precise feature for fault analysis, the statistical features of the scalogram which incorporated the Tamura vision features were proposed to diagnose the aeroengine rub-impact faults quantitatively. The experiments on the aeroengine test data demonstrate these statistic characteristics of the scalogram effectively diagnose the rub-impact faults.
Research on Numerical Simulation of Filling Velocity of Indirect Squeeze Casting in Shaping the Thin Walled Workpiece
Authors: Xu Cai Ling , Ying Fu Qiang
Published: February 2011

In general, filling velocity of indirect squeeze casting mainly causes gas wrapping and slag inclusion, and it influences quality of casting parts directly. In this paper, filling velocity was researched on by Procast, moreover, models of casting parts and die were modeled. Furthermore, filling of a kind of panel was simulated, and the simulation results were analyzed. In conclusion, the best filling effect can be gotten, when the velocity v is equal to filling time t. As a result, it could offer better casting parameters for similar casting parts in squeeze casting.
Research on the Credibility of Fuzzy Reliability
Authors: Li Ling Ling , Zhu Fen Fen , Yang Chun Wen , Li Zhi Gang
Published: February 2011

According to the situation of randomness and fuzziness existing in the actual project, this paper proposed a reliability-credibility model based on fuzzy theory, possibility theory and credibility theory. At firstly, a reliability-possibility distribution curve was constructed by the traditional stress-strength interference model, then, a reliability distribution function was established based on this. This model built a bridge between credibility and reliability in handling randomness and fuzziness. The research results show that the model can hand the situation of random information and fuzzy information coexistence well, and the acceptable level of reliability and the most credible reliability value can be reflected directly in the reliability-credibility distribution curve. Compared with other methods, it obtains more reliability information, accords with the actual engineering situation and guides reliability engineering design much better.
Robust Control for a Class of Nonlinear Systems Based on Backstepping
Authors: He Nai Bao , Gao Qian
Published: February 2011

Based on coordinate transform, the paper deduced the principle with which Chua’s chaotic system can be translated into the so-called general strict-feedback form. Combining the backstepping method with robust control technology, an adaptive parameter control law is developed and thus the output tracking is successfully accomplished for the system with unknown parameters and dynamic uncertainties. It is proved that all states of the closed-loop system are globally uniformly　ultimately bounded, and lead the system tracking error to a small neighborhood. Finally simulation results are provided to show the effectiveness of the proposed approach.
Construction Method of Fuzzy Attribute Information System Based on DEA and Attribute Reduction
Authors: Li Yan Kun
Published: February 2011

For the subjectivity of attribute value in the fuzzy attribute information system, this paper proposes a construction method of fuzzy attribute information system based on DEA (Data Envelopment Analysis). Then an attribute reduction method based on the dependability degree of attribute is given. At last, the proposed method is implemented successfully in the optimization of evaluation index system.
Analysis on Ecological Principles in Macau Urban Design
Authors: Wu Yao , Vizeu Pinheiro Francisco
Published: February 2011

Macao managed for over 400 years to develop Iberian characteristics in the city together with the Chinese characteristics; it has formed an organic urban fabric reflecting ecological principles original from different places, that could easily to be adopted under tropic circumstance, The study focus on the researches of how these elemental principles should be, and how to develop and maintain those ecological principles. Survey was done on existing data from three different sources, namely 1) graphic images and maps, 2) documents archives, 3) archeological findings. The paper contributed for the knowledge would not only helpful to Macau modern urban renewal, but also benefit to relevant projects on ecological city plan.
Analyzing the Vibration System with Time-Varying Mass
Authors: Zhu Yan , Wang Shu Lin
Published: February 2011

Considering that impact motion is not only a function of time but also dependent on phase-angle, we suppose the non-linear response of the vibro-impact system with time-varying mass is a function dependent not only on different time scale but also on the phase parameter. An approximate analytical solution of second order for the vibration is obtained by using Multi-Scales Method. The feasibility is verified by the numerical solution using Runge-Kutta algorithms. It is shown that the motion of the variable mass system has periodic behavior with the period of the changing mass, and the mass variation can only influence the system amplitude but not its cycle. However, the bigger the mass factor varies, the more intensive the response enlarges, and vice versa. The method and findings may be useful to analyze similar vibration systems with impact dampers or design the vibration control strategy.
Strongly Ding Projective, Injective and Flat Modules
Authors: Xing Jian Min
Published: February 2011

Some properties of strong Ding projective ,injective and flat modules are studied and some connections between strong Ding projective ,injective and flat modules are discussed . At last, these properties under change of rings are considered.
A Derivative-Free Filled Function Method for Non-Linear Inverse Optimization of Material Parameters
Authors: Lv Ying Hui , Yu Yan Zhen
Published: February 2011

In solving non-linear inverse optimization problems, how to make sure one and only solution and cut down computational effort are two very representative challenges. As thus, the derivative-free filled function method is proposed, it couples the classical filled method theory and dynamic canonical descent method. The application results of non-linear inverse analysis of material parameters for a practical engineering show that the derivative-free filled function method can quickly solve non-linear inverse problems with one and only solution, and it will be robust one in non-linear inverse solution field.
Study on the Adaptability of Staining Method for Acoustic Field Measuring in Ultrasonic Processing
Authors: Zhang K.H. , Wang Guo Feng , Lu Shuang
Published: February 2011

In order to search for an ideal method to measure the acoustic field, the staining method was studied. First of all, the experiment device was designed to produce standing wave, and then the coated papers were inserted into the methylene blue solution. At last the experiment result was analyzed. It illustrated that in the power range of about 10w to 250 w, staining method was a good one which could described the distribution of acoustic pressure in container which used for acoustic processing or sonochemistry.
The Influence of the Voltage Slope to the Homogeneous Multiple-Pulse Barrier Discharge at Atmospheric Pressure
Authors: Xie Peng , Liu Yan Ling , Cui Shao Yan
Published: February 2011

The homogeneous barrier discharge with multiple current pulses at atmospheric pressure in helium is numerically studied on the basis of one-dimensional fluid model .The influence of the applied periodic polygonal function voltage slope to the intervals of the corresponding current pulses and the power are discussed and analyzed.The simulation results show that ,in the case of invariable voltage amplitude and variable voltage slope,the number of current pulses , intervals of the corresponding current pulses and the operating factor of the power are changing.
A Biomimetic Squid Funnel Actuated by Shape Memory Alloy Wires
Authors: Wang Zhen Long , Gao Fei , Wang Yu Kui , Guo Cheng
Published: February 2011

Inspired by the squid’s funnel which can bend flexibly, a kind of biomimetic squid funnel actuated by shape memory alloy (SMA) wires was developed for controlling the jet direction in this article. With the application of Pulse Width Modulation (PWM) technique, experimental investigation was conducted. And the results show that, the bending angle of the biomimetic squid funnel can be controlled by changing PWM duty cycle and the final stable resistance of SMA wire decreases while the duty cycle is increased. The relationship between the banding angle of the biomimetic squid funnel and the resistance of SMA wire is approximately inverse linear. The feasibility of jet direction control with the biomimetic squid funnel was verified by a simulated jetting experiment.
Convergence Theorems for Accretive Operators in Banach Spaces
Authors: Guo Yan , He Ji Wei , Yang Yan Mei
Published: February 2011

In this paper, a new iterative scheme for finding a common element of the set of fixed points of a nonexpansive mapping and the set of the variational inequality for an inverse-strongly accretive operator in a 2-uniformly smooth Banach space was introduced . It was verified that the sequence converged to a common element of two sets.
Estimation of Origin-Destination Matrix with Tolling Data
Authors: Wang Hua , Zhang Xiao Ning
Published: February 2011

Prior matrix and surveyed link volumes were, in most cases, employed to estimate origin-destination matrix. With the development of BOT and of congestion pricing, charged links become an important component of road network, due to the fact that the tolling data: volumes and travel time on pricing entry-exit are traffic information, both cost-free and accurate. In this paper, we put forward a bi-level programming model, taking account of data on charging entry-exit to estimate OD matrix based upon the traditional model. Meanwhile, a heuristic method -the simulated annealing approach - is utilized to solve the OD estimation problem. Results of examples indicate that the accuracy of estimation will be improved while adding the tolling data, and that it is feasible to calculate OD matrix by combining the volumes and travel time on entry-exit with partial common link flows. In this light, this way can be applied to enhance accuracy, and also to reduce the cost spent on surveying the link flows in common OD matrix estimation.
A Important Property on Planar Graph
Authors: Li Na Na , Wang Shu Jun , Meng Xian Rui
Published: February 2011

In 1994, C.Thomassen proved that every planar graph is (namely ). In 1993, M.Voigt shown that there are planar graphs which are not . But no one know whether every planar graph is . In this paper, we give a important property on planar graph that “Every planar graph is ” and “Every planar graph is free ” are equivalent.
Some Properties of BSDEs Driven by a Simple Lévy Process with Continuous Coeffcient
Authors: Zheng Shi Qiu , Jin Dian Chuan , Zhang Shuai , Yang Yan Mei , Wang Jin Peng
Published: February 2011

In this paper, we mainly study the properties of solutions of backward stochastic differential equations (BSDEs) driven by a simple Lévy process, whose coefficient coeffcient is continuous with linear growth. A comparison theorem for solutions of the equations are obtained, we also show the equation has either one or uncountably many solutions.
Study on Simulation and Optimization of the Road Rush-Repair Model after Disaster
Authors: Zhang Tie Zhu , Lu Yong Min
Published: February 2011

In view of the facts that the road network is damaged after disaster, this study made an intensive study of how to make the road repair scheduling in a short time. Based on the actual situation of disaster, and the emergency repairs at the time of uncertainty, established a fuzzy multi-objective mathematical model for road rush-repair scheduling. This model based on VRP, containing time window, take the sum time of the repair work, the time of the work group in transit and the risk of the rush-repair. In the model solution, combined the simulation with optimization methods, take eM-plant as a platform, design a genetic algorithm method which is more suitable in solving scheduling model of the transport emergency supplies, Through a numerical example of empirical analysis, proves the validity of models and algorithms, provided a scientific foundation for the government to make reasonable rush-repair scheduling when the disasters occur.
CDMA Multiuser Detection Based on Improved Particle Swarm Optimization Algorithm
Authors: Liu Nan Ping , Zheng Fei , Xia Ke Wen
Published: February 2011

CDMA multiuser detection (MUD) is a crucial technique to mobile communication. We adopt improved particle swarm optimization (PSO) algorithm in MUD which incorporates factor and utilizes function to discrete PSO. Comparison of BER and near-far effect has verified its effectiveness on multi-access interference (MAI). The algorithm accelerates the convergent speed meanwhile it also displays feasibility and superiority in case simulation.
An Intelligent Feature Selection Method Based on the Bacterial Foraging Algorithm
Authors: Liang Dong Ying , Zheng Wei Kun
Published: February 2011

This paper puts forward an agent genetic algorithm based on bacteria foraging strategy (BFOA-L) as the feature selection method. The algorithm introduces the bacteria foraging (BF) behavior, and integrates the neural network and link agent structure to achieve fuzzy logic reasoning, so that the weights with no definite physical meaning in traditional neural network are endowed with the physical meaning of fuzzy logic reasoning parameters. The algorithm can maintain the diversity of the agent, so as to achieve satisfactory global optimization precision. The test result shows that this algorithm has good stability, little time complexity and high recognition accuracy.
Coupling Acoustic Analysis of Enclosure Consisting of Multi-Flexible Plates and its Active Structural Acoustic Control
Authors: Gu Lin Ning , Chen Nan
Published: February 2011

This paper develops a model of structural-acoustic coupled system of a rectangular enclosure involving two simply supported flexible plates. The acoustical potential energy and the optimal secondary control forces are derived theoretically. An example is presented to analyze the characteristics of the coupled system, the dominant factors that impact the coupling effects and the noise reduction with ASAC method. The paper shows the possibility of applying distributed cooperative control method to the structural-acoustic coupled system.
Design for Automatic Cone-Shaped Dynamic Traditional Chinese Medicine Extraction Equipment
Authors: Liu Bo , Wang Hai Ning
Published: February 2011

In order to solve the low automatic degree and poor quality of extract production to traditional Chinese medicine, a new automatic cone-shaped dynamic traditional Chinese medicine extraction equipment is designed. This equipment has innovation research in extraction process, structure design aspects, to achieve high efficiency, saving energy and automatic extraction purpose.
Study of Milling Force in High Speed Milling Carbon Fibre Reinforced Plastics (CFRP) Using Diamond Tool
Authors: Liu Dong , Wang Huai Ying , Xu Hong Hai , Zhang Chao Ying
Published: February 2011

The Composites are difficult machining materials which widely used in aerospace industry due to their excellent mechanical properties. Tool wear and delamination are considered the major concern in manufacture the parts and assembly. The orthogonal experiment method was used to investigate the milling force of carbon fibred composite with diamond mill tool. The experiments were carried out under air cooling cutting conditions. The experimental results indicated that the feed rate was the most significant fact which affect the average peak value of the milling force. the average milling force decreased with the cutting speed increased and increased with the feed rate and width of cut increased.
A Note on q-Derivative Operator and Divided Difference
Authors: Cui Feng
Published: February 2011

The q-analogue of the derivative operator is playing a more and more important role in mathematics and physics. Moreover, the divided difference, as an important and classical mathematical tool with a close relation to the derivative, is also used in many fields. In this paper, the connection between the q-derivative and the divided difference is investigated such that the q-derivative can be understood better. The q-derivative of higher order of a function f can be represented by the divided difference of f at some special nodes. Furthermore, the result is used to provide a new and easier proof of q-Leibnitz formula and its generalization.
Searching Best Strategies Algorithm for the No Balance Assignment Problem
Authors: Fang Mao Yan , Wang Min Le , Bi Yi Ming
Published: February 2011

The No Balance Assignment Problem (NBAP) is mainly resolved by changing it into Balance Assignment Problem (BAP) and using classical algorithm to deal with it now. This paper proposed Searching Best strategies Algorithm (SBSA) to resolve this problem, and it needn’t to change NBAP into BAP. SBSA resolves NBAP based on searching the best answer of the cost matrix. This algorithm’s theory is simple，and it is easy to operate. The result of the research indicate that the algorithm not only can deal with NBAP, but also can deal with BAP and other problems such as translation problem.
Hermitian Solutions to a Quaternion Matrix Equation
Authors: Li Ning , Jiang Jing , Wang Wen Feng
Published: February 2011

In this paper, we consider Hermitian and skew-Hermitian solutions to a certain matrix equation over quaternion algebra H. Necessary and sufficient conditions are obtained for the quaternion matrix equation to have Hermitian and skew-Hermitian solutions, and the expressions of such solutions are also given. As an application, the common skew-Hermitian g-inverse of quaternion matrix A and B is considered.
Kinematic/Dynamic Simulation of Gear System of Tunnel Boring Machine
Authors: Zhu Li Da , Zhao Hai Feng , Zhang Ming Liang , Wang Wan Shan
Published: February 2011

Gear system of tunnel boring machine is simulated and analyzed in kinematic/dynamic based on virtual prototype to ensure stability in motion process. The three-dimensional model is built by using SolidWorks software and gear system of virtual prototype is simulated by using ADAMS. The angular velocity of gears and force curves between gears and shaft are got by simulation to analyze kinematically and dynamically, so the method can provide reference of dynamic optimization design.
Incentive Contract Designing of Preventing Conspiracy in Construction Project
Authors: Feng Li Chao , Liu Zhi You , Wan Xing Huo , Qu Jing Guo , Peng Ya Mian
Published: February 2011

With rapid growth of national economy, infrastructure construction maintains vigorous development, but there are some serious problems in this field such as the conspiracy between construction unit and supervision unit. This paper introduces some background of construction project management system, analyses relation and benefit of project’s tripartite main body, and establishes game model between government and supervision unit. Finally, the paper designs governmental incentive contract, and calculates optimal incentive reward which maximize governmental expected utility, which could encourage supervision unit to supervise construction unit by adjusting reward, and decrease probability of conspiracy between supervision unit and construction unit.
The Study of the Brake Test Bench Model
Authors: Cui Yu Huan , Li Bao Feng , Qu Jing Guo , Wang Zhen
Published: February 2011

This paper will focus on the control method of the brake test- bench, we have used physics, theoretical mechanics, numerical methods method and use Matlab software, Excel software to calculated data and drawing. Eventually we establish a mathematical model to control electric current. . The model will help us testing the merits of the brake, and assist us in the design process.
Solution to China’s GDP Prediction Problem by BP Neural Network
Authors: Zhou Guan Chen , Wang Kai Li , Cui Tong
Published: February 2011

GDP algorithm has become the important means for China’s economic management departments to acquaint with the economic operation conditions and the important basis on which the economic development strategies and planning and various macroeconomic policies are worked out by them. Therefore, research and establishment of GDP model have an important and practical significance. In this paper, the BP neural network is adopted to perform the research and prediction of China’s GDP. Firstly, the original data of larger ones are observed and introduced into the commonly applied function of sigmoid function, but the effect is not ideal and the normalization point concentrates on , which may affect the predicted values, so a simple improvement is made for the sigmoid function to make the function value distribute between 0 and 1 and then the normalized function after improvement is better.
Numerical Method Research of Partial Differential Equations Inverse Problem
Authors: He Ya Li , Peng Ya Mian , Feng Li Chao
Published: February 2011

It is feasible for the inverse problem of research in the very vital significance between in practical application. Genetic algorithm is applied in many aspects, but we are more concerned with the application in mathematics. From the start of genetic algorithm, the collection to search for comprehensive coverage of preferred. Due to genetic algorithm is used to search the information, and does not need such problems with the problem is directly related to the derivative of the information. Finally, the results of numerical simulation show that the GA method has high accuracy and quick convergent speed. And it is easy to program and calculate. It is worth of practical application.
Research on the Model of Positioning System and its Application
Authors: Jin Dian Chuan , Meng Xiao Li , Wu Hai Ming
Published: February 2011

Digital Cameras positioning has a wide range of application in the aspect of traffic monitoring (e-police). The introduction of space Cartesian coordinate system together with the principle of image formation of digital camera and the physical relations among image, camera, and the original picture is where the general linear space model, with the Gaussian formula, Physical optics imaging as the constraint condition, is built, putting forward the theoretical formula of pinpointed coordinates of the center of the circle in the target plane on the plane of camera. Then we can safely draw the conclusion that the track of the target plane formed on the plane of an oval track. Second, the use of graphic tools extracting the track of the edge can help to fit out of elliptic equations, showing the coordinates of the five centers.
On the Dimension of Bivariate C1 Cubic Spline Space with Homogeneous Boundary Conditions over a CT Triangulation
Authors: Gong Dian Xuan , Lang Feng Gong
Published: February 2011

A bivariate spline is a piecewise polynomial with some smoothness de ned on a parti- tion. In this paper, we mainly study the dimensions of bivariate C1 cubic spline spaces S1;0 3 (CT ) and S1;1 3 (CT ) with homogeneous boundary conditions over CT by using interpolating technique, where CT stands for a CT triangulation. The dimensions are related with the numbers of the inter vertices and the singular boundary vertices. The results of this paper can be applied in many elds such as the nite element method for partial di erential equation, computer aided design, numerical approximation, and so on.
Analysis of Subsynchronous Oscillation in a Multi Turbo-Generator Sets Power System Based on Electromechanical Wave Model
Authors: He Cheng Bing , Wang Zhi Yong , Shen Jian
Published: February 2011

Electromechanical wave model is a new method in the research of generator-grid dynamic response of large scale electric power systems. Based on wave equations of elastic bearing transmit mechanical power and transmission line transmit magnetic power respectively, this paper built integrate electromechanical wave model of turbine-generator-grid with the example of No. 3 unit in Yimin Power Plant. With the help of electromechanical wave model, subsynchronous oscillation (SSO) example was given which indicated that the higher disturbance voltage, the bigger SSO amplitude; the larger damp, the smaller SSO amplitude, which will make the fluctuation become stable earlier. This conclusion has significant engineering value on reducing SSO amplitude of Yimin power plant.
Dynamic Response of Supercavitating Underwater Vehicle Impacted by Tail-Slap Force
Authors: He Qian Kun , Zhang Jia Zhong , Wei Ying Jie , Wang Cong , Cao Wei
Published: February 2011

Based on the movement characteristics of the supercavitating underwater vehicle, the tail impact force has been defined by summarizing related papers, then the dynamic responses of structure has been simulated by using Finite Element Method. The displacement and acceleration responses and corresponding spectrums have been gotten. The calculation results show that: the displacement response along impact force's direction oscillates periodically; the displacement response along body axis lengthens and shortens periodically; the displacement response along the 3rd axis increases over time. The acceleration response along impact force's direction and body axis oscillates periodically. The corresponding spectrums show that: accessories of the underwater vehicle should avoid some scaled frequencies in order to let them run reliably.
Normal Stress between Steel Wires in the Stay-Cable
Authors: Zheng Gang , Li Hong
Published: February 2011

The normal stress between wires is one of the main factors of the slipping and stress concentration in the stay-cables. In order to improve the research on the stay-cables, the mechanism of the normal stress has been studied in this paper. The normal stress can be resulted from two reasons. Firstly, the normal stress generate from the semi-parallel wires because of the existence of spiral angle. Secondly, the normal stress results from the pinch-effect generated by the hot-extruding PE protection. Both the formulation have been listed to analyse the normal stress in this paper. Result shows, the normal stress between the outermost layers is far smaller than the inner layers. Finally, the field survey surveys have been used to verify the analysis.