bluuebunny/crossref_metadata_2025 huggingface dataset:
Study on Cooling Performance of Eject Quenching by Mixture of Nitrogen-Spray Water
Authors: Shao Bao Dong , Cheng He Ming , Li Jian Yun , Li Zi Liang , Hou Li Jun , Hou Jie , Wang Li Feng , Ding Dong Fang , Tian Chong
Published: February 2011

Though gas quenching has several advantages, such as minimal environmental impact, little deformation, low energy cost, clean products, and ability to control the cooling locally and temporally for best product properties, its cooling performance is less than that of oil and water. If gas is mixed with spray water, the mixture will has favorable cooling performance. The cooling performance of eject quenching by mixture of Nitrogen-spray water is studied experimentally. Alloy steel 9SiCr is specimen, and it is quenched by a certain proportion of mixture gas of Nitrogen and spray water under normal pressure and high velocity, and the continual cooling curve is determined. The experimental results show that it can improve the cooling effect of quenching medium on the one hand; on the other hand, it can decrease the deformation and residual stress of specimen. The results also show that cooling performance of the mixture and cooling velocity can be enhanced by increasing gas pressure when the mixture ratio is fixed, and it takes short time to cool to room temperature. The cooling performance of the mixture and cooling velocity can be enhanced by increasing the mixture ratio under same pressure, and it also takes short time to cool to the room temperature. The continual cooling curve is determined, which gives the information of cooling performance of eject quenching by mixture of Nitrogen-spray water under Normal pressure changed with the pressure and the mixture ratio of Nitrogen and spray water.
Study on Dynamic and Estimated Algorithm for RFID Tag Anti-Collision
Authors: Yi Chao , Liao Hong Zhi , Wu Jian De
Published: February 2011

RFID is an important part of Internet of things, however, solving tag anti-collision problem is the key to RFID. In order to improve the identification efficiency of anti-collision algorithm, the performance of the time slot ALOHA algorithm is analyzed and the improved ALOHA is proposed that when there is an unknown number of tags, the window size will be dynamically adjusted according to the anti-collision algorithm. When estimate the number of tags, the conflict probability is taken into account and according to the current window size, the return value of each read cycle, the calculated conflict probability, and the estimated number of tags, the window size will be dynamically adjusted. The number of tags and the colliding tags within one time slot can be identified quickly and the performance of the system and tag anti-collision algorithm will be improved. Through modeling and simulation, after comparing and analyzing the results, the practicability and feasibility of the improved anti-collision algorithm is verified.
Study on ERT System of Smart Layer of Carbon Fiber Composite
Authors: Lv Yong , Zhang Xiao Yu , Li Zhuo Qiu
Published: February 2011

Electrical resistance tomography (ERT) is always used in the field of detection of medicine、prospecting、two phase flow at the present time. It is rarely used to measure structure under condition of loading. In this paper, with the characters of different response - resistance effect showed by carbon fiber felt when attached to the different matrix, we developed a new type of smart layer of carbon fiber composites, the composite material has a very high pressure-resistance sensitivity, combined with ERT technology, the structure surface electrical resistivity distribute can be conversed, thus the structure of the surface of the load situation can be analyzed.
Study on Intelligent Control Strategy for Semi-Active Suspension System of Tracked Vehicle
Authors: Zeng Yi Hui , Liu Shao Jun , Cheng Wei
Published: February 2011

Considering the multiple and complicated driving conditions for tracked vehicles and their structural features, a comprehensive intelligent control method to deal with semi-active suspension was proposed based on the principle of magneto rheological damper. One half of the tracked vehicle suspension system is taken as the research object, where analysis is directed to the vertical amplitude, pitch angle and vertical body acceleration response. And the magneto rheological damper was taken as an actuator, the fuzzy control was taken as feedforward and PID control was taken as feedback. The control system model has been established by using of the complex random road output to simulink due to the condition of MATLAB/Simulink. The simulation results show that it is of good real-time control competence, good robustness and high accuracy, etc. Contrasting to passive suspension, some capability parameters such as the body vertical amplitude, pitch angle and the body vertical acceleration of the semi-active suspension system can had been well controlled by using of the intelligent hybrid control method, for exmple, the root mean square value of vertical amplitude decreased by 37.2%，the root mean square value of pitch angle decreased by 45.2% and root mean square value of the vertical vibration acceleration decreased by 38.6%.
A Study on Flange Lathe of Double-Tool Holder Based on Optimization Design Method of FE
Authors: Ying Fu Qiang , Wang Yi , Wu Ling Dong , Li Liang Yi
Published: February 2011

With the optimization design method of FE,the FE model of vertical flange lathe beam of double-tool holder was established,the sensitivity analysis of dynamic performance for the machine tool was performed based on presented modal analysis and probability analysis.The influence rules of the first four natural frequencies affected by the design parameters of the lathe beam were confirmed and the weaknesses of it were indicated as well.Then, the structure of the lathe beam was optimized.As a result ,the dynamic performances of the lathe beam are improved and it offers the basis for the optimization design of the other lathe parts.
Study on Spectral Characteristics of Acoustic Emission from Pressure Pipe Leakage
Authors: Jin Zhi Hao , Zheng Xue Ting , Tang Li Ming
Published: February 2011

Detecting leakage liquid-filled pipe by acoustic emission instrument and researching the acoustic signal that measured with water by experimental medium. Gathering the acoustic signals in different pressures or different diameters of leakage aperture and analyzing the spectrum characteristics by wavelet packets and db5 wavelet basis. The result show that major frequency components contained at about 232KHz-239KHz. The acoustic emission signals’ amplitude and energy enhance as pressure and leakage aperture diameters’ increase.
Study on the Application of Simulated Evolutionary Optimization Algorithm in Optimizing the Combination of Unit Commitments in Power System
Authors: Liu Qing Song , Tong Jia , Li Yi Feng
Published: February 2011

This study adopted a simulated evolutionary optimization algorithm, ant colony optimization algorithm to find the optimal unit commitment operation. The concepts such as status, strategy, and path, etc. were introduced to devise the optimization of unit commitment operation by ant colony optimization algorithm mode, so that the optimal unit commitment operation could be found by ant colony optimization algorithm. To cope with different constraints by additional penalties and restrict the statuses not satisfying the constraints by tabu table, the retrieval of ant colony optimization algorithm could always be performed in feasible region and the retrieval process of the algorithm was effectively conducted. It is feasible and efficient to find the optimal unit commitment operation by ant colony optimization algorithm, which was proved by stimulation.
Study on the Properties of Natural Shear Strength for Municipal Solid Waste
Authors: Zhang Zhen Ying , Wu Da Zhi
Published: February 2011

The Properties of natural shear strength for municipal solid waste are studied by applying a new developed direct shear testing instrument. The municipal solid waste is divided into three parts: incompressible solid waste, reinforced material that is difficult to be biodegraded and the material that is easy to be biodegraded. The properties of these three parts are 15%, 5% and 80%, respectively. A series of laboratory tests have been conducted for different initial void ratio, and different pressure applied on the test specimen. The testing results show that the initial void ratio is a key factor for the natural shear strength of the municipal solid waste, the relationship between the shear stress and the shear strain is a strain hardening curve, the shear stress gradually increases with the shear strain. Besides, the natural shear strength shows a linear relationship to the pressure applied on the test specimen, and it is in accordance with the law of coulomb. According to the fitted lines, the shear strength parameters are obtained. The cohesion varies from 4.7 to 12.6kPa, and the internal friction angle varies from 14.5 to 18.3 degree for the shear strain is equal to 5%. When the shear strain is equal to 20%, the cohesion varies from 8.5 to 17.2kPa, and the internal friction angle varies from 25.5 to 30.7 degree.
Testing Research of Aspect Ratio on Corrugated Box Compression Strength
Authors: Wei Zhuan , Hua Guang Jun , Zhao De Jian
Published: February 2011

The aspect ratio is one of the important factors that impact the corrugated box compression strength. In this paper, the three most commonly method that can be used to obtain the corrugated boxes’ compression strength, namely testing method, classic formula method and computer simulation method were compared. Selecting some 0201 BC flute corrugated boxes as the object, on the condition that the cardboard materials, carton height and circumference of the corrugated box is at the same, the compression strength of corrugated boxes which aspect range from 1 to 3 were tested and calculated respectively by compression strength testing method and classical formula. The results show that when the aspect ratio changes from 1 to 3, the compression strength increase at first, and then decrease; the compression strength reach maximum when the aspect ratio at 1.6 or so. The results show that the classic formula calculation data are large deviate from the testing ones. Research shows that due to not fully take into account the influence of corrugated cardboard quality, box forming process, temperature and humidity and other factors, the currently classic compression strength formula are more conservative.
The Construction of Optimized Model of Milling Process Based on the Pursue of Economy and Profits
Authors: Yan Wei , Huang Xian Qi , Hu Yong
Published: February 2011

The optimized model of machine tool processing is a typical one of constrained optimized model. This paper investigates the construction of optimized model of milling under a variety of objective or subjective environment, and aims at minimizing the cost and maximizing the profits.
The Detection of Voltage Flicker Based on Complex Wavelets
Authors: Zhang Rui , Liu Gu Quan , Zhang Li Yong , Zhang Xu Hui
Published: February 2011

The discrete wavelet transform based on the orthogonal wavelet bases has the disadvantage of shift-variant. In this paper, using the compactly supported dyadic orthogonal real-valued wavelet bases to construct the compactly supported dyadic orthogonal linear phase complex wavelet (LCW) bases in terms of alternately lifting scheme. Linear phase complex wavelet can separate the envelope of the flicker signal. The core of the method is a pair of Hilbert transform including the flicker signal in wavelet field is come into being, i.e. a pair of quadrature components with the same amplitude and the same frequency can be used to realize the demodulation of an amplitude modulated voltage flicker signal. Simulation experiments show the method proposed has the characteristic of shift-invariant comparing with the traditional discrete wavelet transform, result of separating envelope of the flicker signal is independent of initial time recording signal.
The Effect of Mineralizers on Synthesis of Perovskite-Phase Lanthanum Aluminate Powders
Authors: Wang Xiu Hui , Zhao Guo Quan , Zhao Yan Min , Gao Hong , Yang Jin Long
Published: February 2011

The solid-reaction was applied to synthesize perovskite-phase Lanthanum Aluminate powders by using AlOOH and La2(C2O4)3 as raw materials, mineralizer AlCl3 and AlF3 as the additives, graund and mixed, then calcined at 800°C and 1200°C for 3 h. The XRD pattern shows that mono-phase LaAlO3 powders can be obtained at 1200°C, and the SEM analysis indicates that the AlCl3 and AlF3 can promote the grain growth and have a good control of morphology.
The Identification of the Flame Combustion Stability Based on the Mahalanobis Distance
Authors: Huang Yao Song , Liu Shi , Li Jie , Lei Jing
Published: February 2011

The identification of stability about flame combustion plays a vital role in the industrial production of plants. Paper integrates the phase information into identification system extracted by higher order spectral, and stresses on identifying the stability of flame combustion with the application of the Mahalanobis Distance, combined with the other two characteristic quantities: the flame intensity variance and flicker frequency. The Mahalanobis Distance can overcome the interference correlation of the flame characteristic quantities and the impact of different dimensions, so the identification rate reaches to 93%, which effectively verifies the correctness of the Mahalanobis Distance.
A Synthesizable Asynchronous Wrapper with Standard Cells
Authors: Wu Rui Zhen , Yang Yin Tang , Guan Xu Guang
Published: February 2011

A new asynchronous wrapper circuit is proposed based on standard cells for the realization of point to point high speed seamless data transmission. The wrapper is realized from the Signal Transition Graph (STG) by Petrify based on the fundamental GALS system structure. The asynchronous circuit includes the design of synchronous/asynchronous interface and local clock which can be suspended. The traditional EDA tools are merged together with asynchronous circuit design, and the wrapper only has standard cells but not special asynchronous logic gates. The simulation and verification were made by Modelsim and Quartus respectively, and the results have shown that the GALS system works properly and has a preferable performance.
The Management Strategy of the Unstructured Information in MES
Authors: Yao Zhi Ying , Cao Hai Qing
Published: February 2011

Much information in MES is unstructured, such as drawing and document. It is very important for MES to reasonably manage and reuse the unstructured information. A new management strategy of the unstructured information is put forward in the paper, First the basic management method and realization procedure are simply presented; Second the technologies related to the management strategy such as layout analysis, content structured, data management based on xml schema and data query & analysis are analyzed in details; Last the practical use and further research direction of the strategy are depicted. The value of the unstructured information can greatly enhanced through the strategy put forward in the paper.
The Properties and Morphology of Poly (Butadiene-Graft-Styrene) Latex Modified Mortars
Authors: Zhao Wen Jie , Zhang Hui Xuan
Published: February 2011

Polybutadiene-graft-polystyrene (PB-g-PS) latex were prepared via emulsion graft copolymerization method. The weight ratios of polybutadiene to styrene ranged from 70/30, 50/50 to 30/70, then the PB-g-PS latex was used to modify cement mortar. This study examines the effects of core-shell ratios（c/s） on the typical properties and morphology of PB-g-PS latex modified mortars. The PB-g-PS latex modified cement mortar were prepared at different polymer-cement ratios（p/c）, and tested to obtain the water-cement ratios（w/c）, fluidity, water retention rate, flexural and compressive strengths. SEM was used to investigate the microstructure of polymer- modified mortars（PMMs）. On the basis of the test results, effect of the c/s and p/c on the typical properties and morphology of PMMs were discussed. It is concluded that PB-g-PS core-shell latex can be incorporated into cement as modifier.
The Self-Tuning Distributed Information Fusion Kalman Filter for ARMA Signals
Authors: Tao Gui Li , Deng Zi Li
Published: February 2011

For the multisensor Autoregressive Moving Average (ARMA) signals with unknown model parameters and noise variances, using the Recursive Instrumental Variable (RIV) algorithm, the correlation method and the Gevers-Wouters algorithm with dead band, the fused estimators of unknown model parameters and noise variances can be obtained. Then substituting them into optimal fusion signal filter weighted by scalars, a self-tuning distributed fusion Kalman filter is presented. Using the dynamic error system analysis (DESA) method, it is rigorously proved that the self-tuning fused Kalman signal filter converges to the optimal fused Kalman signal filter, so that it has asymptotic optimality. A simulation example shows its effectiveness.
Ablation Capability Infection of Hydraulic Turbine Material by Sediment Size Distribution
Authors: Ren Yan , Li Yan Pin , Chen De Xin
Published: February 2011

So far, the research about sediment ablation characteristic of the Yellow River is very insufficiency. For preventing and alleviating sediment ablation of the Yellow River stations by more scientific methods, it is very necessary to research ablation characteristic of hydraulic turbine systematically. The ablation characteristic of hydraulic turbine has direct relation with sediment size distribution. By research ablation of hydraulic turbine material under different sediment size distributions, the common rules are summarized between material ablation and sediment size distribution, and the key data and critical parameters are found out, which provides evidence for sediment ablation defend of hydraulic turbine.
The Simulation and Experiment Study on the Gas Flow in the No-Loaded and Cold Vacuum High-Pressure Gas Quenching Furnace
Authors: Wang Zhi Jian , Shang Xiao Feng
Published: February 2011

In order to learn gas flow state in the vacuum high pressure gas quenching furnace, this paper simulates and tests the gas flow under the no-loaded and cold state. Hot wire anemometer is used to measure the speeds of some feature points, on the one hand to provide boundary conditions for the numerical simulation, and on the other hand to compare with the numerical simulation results. FLUENT software is used to simulate the gas flow of nozzle-type vacuum high-pressure gas quenching furnace. The results show that at the center of the furnace appears high-pressure low-speed zone in which is resulted by the gas collision there, and the vortex also appears in the area around the furnace. The results mean that the cooling rate of works will be slow there. Different exit velocities of five nozzles cause the uneven flow distribution, which will affect the cooling uniformity of works. The comparison between the simulation results and the measured results shows that the error is within 10%. It means that numerical simulation method to predict gas flow is feasible and the results are reliable in high pressure gas quenching furnace.
Tuning the Structure and Parameters of a Neural Network by Using Cooperative Quantum Particle Swarm Algorithm
Authors: Tang Qi Feng , Zhao Liang , Qi Rong Bin , Cheng Hui , Qian Feng
Published: February 2011

In this paper, a cooperative quantum genetic algorithm-particle swarm algorithm (CQGAPSO) is applied to tune both structure and parameters of a feedforward neural network (NN) simultaneously. In CQGAPSO algorithm, QGA is used to optimize the network structure and PSO algorithm is employed to search the parameters space. The amplitude-based coding method and cooperation mechanism improve the learning efficiency, approximation accuracy and generalization of NN. Furthermore, the ill effects of approximation ability caused by redundant structure of NN are eliminated by CQGAPSO. The experimental results show that the proposed method has better prediction accuracy and robustness in forecasting the sunspot numbers problems than other training algorithms in the literatures.
User Fatigue in Interactive Evolutionary Computation
Authors: Yan Jun Rong , Min Yong
Published: February 2011

User fatigue is an important issue in interactive evolutionary computation (IEC). A user’s evaluation will guide the evolution in IEC and a tired user probably misleads the algorithm. Firstly, the impact of the user fatigue is given. Secondly, the cause of the user fatigue is discussed: he/she will have to keep rational, which means that the user will have to keep the consistency between his/her evaluation and preference. And the necessity for the user to keep rational is also analyzed, which will ensure IEC to converge to the user-most-satisfactory individuals. The study of user fatigue established necessary foundation for future research.
Virtual Reality Simulation of 5dof Upper-Limb Rehabilitation Robot Based on Fuzzy Neural Network
Authors: Li Xing , Wang Jian Hui , Fang Xiao Ke
Published: February 2011

In this paper, aiming at the structure of upper-limb rehabilitation robot, establish the model of algorithmic control based on fuzzy neural network and virtual reality simulation model for 5dof upper-limb rehabilitant robot, and take the elbow joint for example to do simulation analysis. The result of simulation shows the fuzzy neural network control is practicable and its control accuracy takes the precedence over the traditional methods. The virtual-reality simulation of 5dof upper-limb rehabilitation robot, which is benefit to understand the complex relationships among the objects, can emulate the features of real rehabilitation robot, laying a solid foundation for rehabilitation evaluation system and telemedicine.
Acoustical Analysis of Chinese Vowels Produced by Alaryngeal Speaker
Authors: Lv Gang
Published: February 2011

The purpose of this study is to advance an objective evaluation system to describe the acoustic characteristics of Chinese vowels in subjects who had undergone a total laryngectomy and compare the results with those obtained in a control group of subjects who spoke normally. Compared to subjective evaluation system, the new evaluation system would be of important guiding significance for the practice of clinical vocal rehabilitation.
Visual Implement of Virtual Reality Tour Based on VRML
Authors: Xia Hou Jian Bing , Rao Jin Tong , Li Yuan , Yao Yin
Published: February 2011

In this paper, a visual solution is presented about virtual reality tour of Web3D based on VRML. After analysis of polyline architectural structure related to tour route, a parametric definition of polyline is given, and a visual editor system of polyline is developed. With our experience on the VR project,the automatic generation algorithm is proposed about the VR tour based on VRML. The application shows that the proposed way can efficiently improve the performance quality of the project.
Wavelet Analysis of Near Infrared Spectral Data in the Application of Denoising
Authors: Lin Xiao Mei , Wang Juan , Yao Qing Hua
Published: February 2011

Spectrum signal may contain many peaks or mutations and noise also is not smooth white noise, to this kind of signal analysis, must do signal pretreatment, remove part of signal and extract useful part of signal.Based on the data of blood glucose near-infrared spectrum as the research object to explore the application of wavelet transform in the near infrared spectrum signal denoising, and through the simulation results show that using wavelet analysis of near infrared spectral data pretreatment than the traditional Fourier method can be higher precision of prediction.
Work Characteristics and Type Selection of Special Turbine in Hydrodynamic Cooling Tower
Authors: Li Yan Pin , Ma Jun Peng , Chen De Xin
Published: February 2011

The author analyzed the working characteristics of special turbine for cooling tower basing on the difference between the special turbine and the conventional hydraulic turbine. This paper points out that the special turbine works in a pressure water system and has typical ultra-low specific speed characteristic. These characteristics determine the type and parameters selection of the special turbine. Based on the theory the author has designed some special turbines in many projects in China. The practical operation shows that the turbines have high energy conversion efficiency and are steady in operation, with fairly good matching of the fans.
XML-Based Intelligent Monitoring and Recording System of Vehicle on Road Cross-Platform Data Exchange Model
Authors: Gu Jiu Chun , Wang Ping , Chen Yan
Published: February 2011

In order to achieve vehicle information in area passageway, many police bureaus or traffic management bureaus had implemented intelligent monitoring and recording system of vehicle on road. It is very important to cross platform data exchange between different field data recorders and central system, at present, there are amount of different data produced by different secure access systems on road, various data formats are one of the main reason to share and full use those valuable data. To solve this problem, this paper provides a promising methodology by applying XML-based language and tested with system working in the real-world. We put forward XML-based message format for the intelligent monitoring and recording system of vehicle, named road secure-access data markup language (RSA-ML) ,which is the cross platform data exchange specification. The paper also gives the definition, data architecture and RSA-ML schema. At last, the paper applies the language in "one river and three circle" prevention and control system in Shandong province, China.
ZigBee Wireless Sensor Networks Based Detection and Help System for Elderly Abnormal Behaviors in Service Robot Intelligent Space
Authors: Song Bao Ye , Tian Guo Hui , Liu Jun , Zhou Feng Yu , Zhang Yan Ru
Published: February 2011

The detection of abnormal behaviors is one of the most important issues in the health monitoring system. Computer vision based techniques, usually combined with statistics, are labor-intensive, time-consuming and costly. Moreover, only monitoring but no help functions are provided. To overcome this limitation, this paper presents a ZigBee wireless sensor networks based detection and help system for elderly abnormal behaviors in service robot intelligent space. The main components of the system, including abnormal behaviors detection module, localization of abnormal behaviors, ceiling projector for robot navigation and development of ZigBee wireless sensor networks, are addressed in detail. Finally, we conclude this paper and future research direction is given.
Adaptive Reconstruction of Leak Signal of Natural Gas Pipeline under Strong Interference
Authors: Lin Wei Guo , Wang Xian Yu , Feng Xian Dong , Guo Qing
Published: February 2011

Although EMD can implement adaptive separation between leak signal and strong background noise, the IMFs used for leak signal reconstruction always change with the varying frequency components. In this paper, an evaluation criteria for leak signal is defined and a method based on the analysis result of EMD for adaptive reconstruction is presented. The results of signal reconstruction and identifying leak location based on field test show this method is feasible and reliable.
Adsorption and Photocatalytic Degradation of Methyl Orange on TiO2 and CuZSM-5 Mixture
Authors: Yang Li Li , Chen Jin Lei , Zhang Wen Jie
Published: February 2011

TiO2 and CuZSM-5 were mixed together as photocatalyst in dealing with photocatalytic degradation of methyl orange. Adsorption and photocatalytic degradation properties of the CuZSM-5 zeolite and mixture of TiO2 and CuZSM-5 were investigated. The CuZSM-5 zeolite has no photocatalytic activity under the experimental conditions. Methyl orange decoloration rate was 65.4%, which was 9.60% higher than that without using CuZSM-5, when TiO2 and CuZSM-5 were at the optimum ratio of 3.13:1. An optimum TiO2 concentration of 250 mg/l occurred when using pure TiO2. However, when using TiO2-CuZSM-5 mixture, the decoloration rate continuously increased with increasing photocatalyst concentration. After 70 min of irradiation, 98.4% of the initial methyl orange decoloration was found using TiO2-CuZSM-5 mixture at TiO2 concentration of 250 mg/l.
Algorithms of Determining any Perfect Matching Mi of Kv
Authors: Xu Zhao Di , Li Xiao Yi , Chou Wan Xi
Published: February 2011

A definition about edge-matrix is given. Two algorithms for solving perfect matching are obtained. Algorithms A is that perfect matching is determined by using edge coloring of edge-matrix ; Algorithm B is that perfect matching is determined by partitioning edge-matrix into sub matrix and also by solving perfect matching of a complete graph .The procedure of constructing round-robin tournament by using algorithm A and round-robin tournament by using algorithm B.
An Approach to Improving Performance of the dc Filter in HVDC Transmission System
Authors: Li Ming
Published: February 2011

The Gui-Guang HVDC system in south china scheme with interconnections to the 500kV transmission to Guizhou and to Guangdong can exhibits, under certain operating conditions, the percussion of the dc filters impedance resonance problems. The analysis explains the dc filters impedance resonance. The influence of changing the dc filter parameters is also studied. Finally, an assessment is made for improve the dc filter performance
A Fast Template Matching Algorithm Based on Wavelet Coefficient Projection Transform
Authors: Fu Xian Ping , Liao Sheng Long
Published: February 2011

As the electronic industry advances rapidly toward automatic manufacturing smaller, faster, and cheaper products, computer vision play more important role in IC packaging technology than before. One of the important tasks of computer vision is finding target position through similarity matching. Similarity matching requires distance computation of feature vectors for each target image. In this paper we propose a projection transform of wavelet coefficient based multi resolution data-structure algorithm for faster template matching, a position sequence of local sharp variation points in such signals is recorded as features. The proposed approach reduces the number of computation by around 70% over multi resolution data structure algorithm. We use the proposed approach to match similarity between wavelet parameters histograms for image matching. It is noticeable that the proposed fast algorithm provides not only the same retrieval results as the exhaustive search, but also a faster searching ability than existing fast algorithms. The proposed approach can be easily combined with existing algorithms for further performance enhancement.
Analysis on Motion Precision Reliability of Hydraulic Support
Authors: Qin Dong Chen , Zhu Qiang , Wu Hong Xia , Guo Zhe Feng
Published: February 2011

In order to research the motion precision reliability of hydraulic support when the influence of the bar length error and gap error is considered, the motion trace mathematical model for the top beam of hydraulic support is established, with the calculation method of motion precision reliability and the effective length of bar based on continuous contact model. Taking some type of hydraulic support as an example, its motion precision reliability is calculated and analyzed. The Monte Carlo simulation is also used to verify the model, and the T-R curve of the gap error and the reliability is plotted. The results from simulation accord with those from the theoretical calculation, which verifies the model established and can provide some valuable reference for the related future research.
Analyzing the Dual Channels for Online Retailer
Authors: Chen Sheng Li
Published: February 2011

By constructing the exponential delay cost function, we formulate the consumer decision model based on the threshold strategies in dual-mechanism, and prove that there exists a unique symmetric Nash equilibrium in which the high-valuation consumers use a threshold policy to choose between the two selling channels. On the basis of the consumer’s threshold strategies, taking the auction length, the auctioned quantity in each period, and the posted price as the decision variables, we develop the seller’ optimal decision model in dual-mechanism, and show the optimal auction design principle and strategy by numerical analysis.
Application of Amorphous Alloy in the New Energy-Efficient Electrical Motor
Authors: Wang Li Jun , Li Jie Qiong , Li Shan Hong , Zhang Guang Qiang , Huang Shu Lin
Published: February 2011

Application of amorphous alloy in highly efficient and power dense motors is increasingly being adopted, helping to solve global warming and energy-saving problems. Compared with conventional silicon steel materials, amorphous alloy shows faster flux reversal, lower magnetic loss and more versatile property modification, which result in the possible application in power electronics, telecommunication equipment, electronic article surveillance systems in the future. Some fundamental problems associated with materials processing and device fabrication technology remain to be further improved.
Application of D-S Evidence Deducing Theory to one Kind of Mechanical Fault Diagnosis
Authors: Tian Hong Xian , Sun Yun Ling , Liu Shu Yong
Published: February 2011

Rotor rub-impact fault may be diagnosed through several kind signal such as rotor vibration, stator vibration and rotor transient speed, and every signal include fault features of different side, so it is possible to improve diagnosis successful probability by mul-information fusing method. The fault identifying frame and combination diagnosis rules are determined using stator vibration and rotor transient speed signals. It is adopted to determine mass function by the S-function, and the deducing method is put up. After peak value of stator resonance demodulation and rotor transient speed fluctuation amplitude information are fused, the method is applied to diagnose rotor rub-impact fault successfully.
A Kind of New Immune Genetic Algorithm and its Application
Authors: Ren Wei Jian , Qi Yuan Jun , Lv Wei , Li Cheng Da
Published: February 2011

According to the phenomenon of falling into local optimum during solving large-scale optimization problems and the shortcomings of poor convergence of Immune Genetic Algorithm, a new kind of probability selection method based on the concentration for the genetic operation is presented. Considering the features of chaos optimization method, such like not requiring the solved problems with continuity or differentiability, which is unlike the conventional method, and also with a solving process within a certain range traverse in order to find the global optimal solution, a kind of Chaos Immune Genetic Algorithm based on Logistic map and Hénon map is proposed. Through the application to TSP problem, the results have showed the superior to other algorithms.
Application of Monte Carlo Method in the Measurement Uncertainty Estimation Technology in next Generation of GPS
Authors: Zhang Ya , Jia Chun Yang
Published: February 2011

Next generation of Geometrical Product Specifications (GPS) is the foundation of the technology standards and metrology specifications of mechanical and electric products. GPS estimation of measurement uncertainty can improve the reliability of the verification result. In the indirect measurement, the transfer characteristic is very complex. So, it is very difficult to estimate the uncertainty in the indirect measurements according to the transfer formula given by GUM. For the indirect measuring of an inside cone angle, the mathematical relation between the measurand and measurement results is established firstly. Then Monte Carlo method was adopted to conduct the sampling and synthesis of measurement uncertainty contributors. At last, the measurement method was evaluated and improved according to Procedure for Uncertainty Management. Experimental result shows that Monte Carlo Simulation method has a good application foreground in the uncertainty estimation and measurement program design.
Application of Structured Low Rank Approximation Method for Noise Elimination from Measured Impulsive Response Functions
Authors: Li Cui Lin , Bao Xing Xian
Published: February 2011

This paper develops a structured low rank approximation (SLRA) method for noise elimination from a noisy impulsive response function (IRF). Cadzow’s algorithm is implemented for the SLRA on the Hankel matrix constructed by measured IRF in order to obtain a filtered IRF. Using the proposed noise elimination scheme, some important factors, such as the size of a Hankel matrix and the quantification of the noise reduction performance are evaluated. Synthesized IRFs are applied to demonstrate the performance, and illustrate the procedure as well, of the proposed scheme in the numerical study. The results indicate that this method can eliminate noise from measured IRFs efficiently.
Artificial Intelligence for the Control of Northeast Region Greenhouse Base on Biomass
Authors: Wang Zhi Gang , Chen Xiao Guang , Wu Wen Fu
Published: February 2011

Greenhouse is used to produce vegetables in winter, the parameter of environment which suit vegetables grow is a complex and ill-defined problem. Furthermore, burning coal to heat greenhouse is expensive than carry vegetables from south region enormously, so at northeast, most greenhouse cannot produce. On the other hand, there are more than several hundred million ton biomass be burned in field. Not only waste natural resources greatly, but also caused pollution seriously. This paper presents an artificial intelligence control system of northeast region greenhouse base on biomass, peasants can use this system produce vegetables automatically by simple intervening. This system also can learn new vegetables growth data and representation it to control vegetable producing.
Building a Standard 3D Face Database Based on Planar Templates
Authors: Li Xin Xin , Gong Xun
Published: February 2011

This paper presents a new point matching method to solve the dense point-to-point alignment of scanned 3D faces. Texture maps of 3D models are generated at first by unwrapping 3D faces to 2D space. Then, we build planar templates based on the mean shape computed by a group of annotated texture map. 34 landmarks on the unwrapped texture images are located by AAM and the final correspondence is built according to the templates. Comparing to the traditional algorithms, the presented point matching method can achieve good matching accuracy and stability.
A Markov Model for the IEEE 802.11 DCF under Limit Load
Authors: Gao Sheng Guo
Published: February 2011

Wireless Local Area Networks (WLANs) have been attracted significant research during the last few years. The primary medium access control (MAC) technique of 802.11 is called distributed coordination function (DCF). DCF is a carrier sense multiple access with collision avoidance (CSMA/CA) scheme with binary slotted exponential backoff. This paper proposes a new Markov model to analyze the CSMA/CA protocol and average packet delay. This model covers the finite load condition and saturation condition. The close agreement between the theoretical results and simulation results using NS-2 under reaffirms the accuracy of the analytical model.
Chaos Characteristics and Control of Permanent Magnet Synchronous Motors
Authors: Xue Wei , Guo Yan Ling , Li Yong Li
Published: February 2011

The permanent magnet synchronous motor (PMSM), a nonlinear dynamic system, can exhibit prominent chaotic characteristics under some choices of system parameters and external inputs. Based on a mathematical model of the permanent magnet synchronous motor, the existence of chaotic attractor is verified by the phase trajectory, Lyapunov exponent map and the bifurcation diagram. Chaotic phenomenon, such as a strong oscillation of speed and torque, unstable operating performance, affects the normal operation of motor. It makes the PMSM in a stable state to control chaos of the PMSM with a control strategy of infinitesimal geometry, which can eliminate chaos well.
Characteristics Analysis of Soil Temperature of Surrounding Underground Pipe of Ground Source Heat Pump when Thermal and Seepage Coupled
Authors: Zhang Xiao Bin , Zhu Wei Bing , Tan Si Peng
Published: February 2011

The heat transfer capability of the underground geothermal heat exchanger (GHE) is influenced by groundwater advection, and heat conduction and groundwater heat advection is coupled. Based on porous medium theory, the GHE’s mathematical model under coupled heat conduction and advection is established with correspond simplifications. Through numerical simulation, the performance of the GHE with groundwater advection is analyzed. The GHE’s heat transfer effect in winter in the continuous operation mode(COM) and the intermittent operation mode(IOM) is compared, furthermore the soil recovering effect in IOM is analyzed, finally the heat recovering time which the soil demands in a system running period is researched. It supplies theory support and technology accumulation for the application of ground-source heat pump (GSHP).
Chromatic Aberration Classification Technology of Ceramic Tile Base on Computer Vision
Authors: Zhang Lei , Li Xiao Hui , Tang Xiao Jun , Liu Jun Hua
Published: February 2011

The defects of artificial detection influenced the chromatic’s classification result of ceramic tile. In this paper, a kind of image registration method in space field is presented based on computer vision to match the ceramic tile. Then, CMC color algorithm based on CIELab color space is used to detect the chromatic aberration of ceramic tile. The experimental results indicate that the method of chromatic aberration classification technology used in this paper can recognize and classify ceramic tile with a high degree of precision. In addition, the measurement speed is improved and can meet the requirement of measurement of chromatic aberration on line.
Coke Index Analysis Based on Principal Component Analysis and Decision Tree Mining
Authors: Guo Hong Wei , Su Bu Xin , Chang Jian , Zhang Jian Liang , Cao Wei Chao
Published: February 2011

Current analysis in the relations between blast furnace production index and coke index is still using the traditional statistical analysis method，but it involves too many coke quality evaluation indexes and there are some overlap between the indexes. According to this situation, this paper puts forward a new method based on principal component analysis and decision tree mining to analyze the relations between blast furnace production index and coke index . The materials of blast furnace production mainly include ore, coke and coal, in which the coke quality index have the biggest influence on the blast furnace production index. It has profound meaning to analyze the relation between coke index and blast furnace production index to evaluate Coke quality indicators reasonably[1] and improve the blast furnace production index. Current analysis in the relations between blast furnace production index and coke index is still using the traditional statistical analysis method[2]，but it involves too many coke quality evaluation indexes and there are some overlap between the indexes. According to this situation, this paper puts forward a new method based on principal component analysis and decision-tree-based data-mining to analyze the relations between blast furnace production index and coke index. On the one hand this method can get few representative indexes from so many evaluation indexes by principal component analysis; on the other hand, decision-tree-based data-mining on the coke representative index based on the principal component analysis can get accurately quantitative relation between blast furnace production index and coke index.
Comparison Analysis of Plastic Deformation in Metal Cutting with Cutting Simulation and Streamline Model
Authors: Bi Xue Feng , Yang Cheng San , Chi Yu Lun , Liu Yong Xian
Published: February 2011

Strain and strain rate are two important parameters evaluating plastic deformation of workpiece in cutting process. Finite element simulation is implemented to estimate plastic deformation of wokrpiece in this paper. Flow net function in simulation is used to capture deformation state of grids on workpiece, and the deformation result is compared with that observed by Stevenson and Oxley in cutting test. Point tracking function in simulation is utilized to calculate strain and strain rate distribution along flow lines, and the results are also compared with that calculated by streamline model.
Control System of Sintering Furnace Based on Lonworks Net
Authors: Gong Cheng Long , Wang Jing Zhuo , Feng Yuan
Published: February 2011

This paper introduces a computer control network system which can control sintering process of four PTFE molding furnaces accurately. System in-out signals such as sintering temperature, on-off signals of dial motor and aeration motor were connected to Lonworks via net nodes, and network variables were used to construct a configuration and interlinkage between the net nodes. We chose a combined-control strategy in which On-off control or Fuzzy-control or Fuzzy-PID control strategy were selected automatically, so the needs to sintering time, cooling speed, steady-state precision etc were accurately achieved.
Description Logic Based Objects and Space Relations Representation
Authors: Luan Xi Dao , Xie Yu Xiang , Tan Yi Hong , Hu Sai , Chen Zhi Ping , Wang Jing
Published: February 2011

This theme focuses on representing and reasoning high-level semantic based on concepts and their space relations. As to multimedia data, such as image and video, acquiring, representing and retrieving high-level semantic information has been a confused problem for a long time. Without the support of knowledge database, it is an impossible mission to carry out the simple synonymous retrieval, let alone retrieving the abstract semantic. This paper proposes some algorithms to translate restored concepts and their relations into a Concept Semantic Network, which is visualized by SVG finally. The paper also introduces the method of recording concepts distribution by description logic, which services users with concepts and distribution retrieval.
A Method to Estimate Control Delay of Signalized Intersection
Authors: Wang Jian Liang , Yang Chao
Published: February 2011

This paper presents a new method to calculate control delay at signalized intersection or other types using speed-time data. For the control delay which composed of deceleration delay, stopped delay, and acceleration delay, it is important to determine the critical points of each delay. This paper uses speed as well as acceleration to determine the critical points and get an accurate result. Different with other researches, it uses the area that composed of real time speed curve and desired speed curve, divided by the downstream speed, to get the control delay precisely. This method needs less data than other methods and can be applied to any traffic condition including variant desired speed or volume. This paper also provides a rapid method, which doesn’t need to determine the critical points, to estimate control delay, and the precision is acceptable.
Design of Easier Controllable High Efficiency Electrodeless Ballast
Authors: Shao Ming Song , Huang Song Ling , Zhao Wei , Dong Jia Rui , Wang Chang Quan
Published: February 2011

Electronic ballast with self-oscillating driving topology for electrodeless lamp operating in 2.65MHz has been restricted by high switching losses because of the very complicated control. To promote the efficiency of the electronic ballast, we present a new independent easier controllable driving scheme in this paper. The IC features of ADuM1234 and the duty circle control method to achieve ZVS operation are also presented. It is shown that the 2.65MHz, 75W electronic ballast has a 91.1% inverting efficiency.