bluuebunny/crossref_metadata_2025 huggingface dataset:
Image Registration of Blown and Swayed Trees
Authors: Han Dian Yuan , Huang Xin Yuan
Published: April 2011

This paper concerns the problem of blown and swayed tree image registration. The swayed tree leaves and little branches contain plenty of details or feature points, but matching with these points may result in error image registration. In this work, we delete some details of leaves and little and thin branches by using of morphological image processing methods, then extract the relatively invariant crotch features of trees from thinning images, lastly we adjusted the matching points with L-M algorithm. Results show our method is insensitive to the ordering, rotation and scale of the input images so it can be used in image stitching and retrieval of images & videos.
A CAPTCHA Image Recognition Algorithm Based on Edit Distance
Authors: Guo Ping , Deng Yi Wen , Zhang Hai Yan
Published: April 2011

Using CAPTCHA is a simple but convenient way to ensure user data security. It’s widely used in user authentication and user interaction. In this paper, CAPTCHA images from several typical websites were used as the research objects. The paper shows the whole process on image binarization, de-noising, dilation, splitting characters. Gives out the CAPTCHA images recognition algorithm based on edit distance which defines the string similarity. Experiments show that the proposed algorithm is simple, fast, robust performance and has a high recognition accuracy rate.
Application of Particle Swarm Optimization in Cylinder Helical HGearH Multi-Objective Design
Authors: Mo Yuan Bin , Liu Ji Zhong , Wang Bao Lei , Wan Wei Min
Published: April 2011

Cylinder helical gGear is widely used in industry. Multi-objective optimization design of the component is often met in its different application sSituation. In this paper a novel multi-objective optimization method based on Particle Swarm Optimization (PSO) algorithm is designed for applying to solve this kind of problem. A paradigm depicted in the paper shows the algorithm is practical.
Efficient Algorithm for Finding Multi-Paths in Telecommunication Networks
Authors: Zhang Jin Xin , Liang Man Gui , Wang Zhao Wei
Published: April 2011

Due to the growing of multimedia data traffic, the shortest path can not be met the requirements of the future integrated-service. Many researches have proved that multi-paths are useful in telecommunication networks for fault tolerance, increasing bandwidth, and achieving better load balance. In this paper, we proposed an efficient routing algorithm based on the integrated cost of path which is composed of delay cost and diversity cost to find multi-paths with the constraint of diversity threshold and path hops. It changed link cost continuously, and the cost is obtained by normal distribution function. We implemented this algorithm in NSF network topology comparing with edge split algorithm (ESA), and the results show that the proposed algorithm has lower integrated cost.
Blasting Vibration Signal Analysis Based on Hilbert-Huang Transform
Authors: Li Dong , Xiang Fang , Liu Hao Quan , Guo Tao , Wu Guang Hua
Published: April 2011

This paper introduces the empirical mode decomposition and Hilbert transform principle. The validity and superiority of Hilbert—Huang transform is proved by MATLAB simulation experiment on computer. Finally, HHT method is used to analyze the collected blasting vibration signal as an example. Research shows that EMD method can process this kind of non-stationary signal such as blasting vibration effectively. Each IMF component decomposed by EMD has clear physical meaning. IMF is determined by signal itself. It has no base function and is adaptive. It can extract main characteristics of signal change and is suitable for analysis of blasting vibration signal which has the features of fast mutation and attenuation. The distribution of time-frequency-energy can be quantitatively described by HHT.
Radar Data Processing Software System Design Based on COM Technology
Authors: Li Zhong Zhi
Published: April 2011

Radar data processing software is a complex system, which has been implemented with mixed language programming using Visual Studio .Net and Visual C++6.0. COM-based software architecture for radar data processing system is proposed in this paper. It provides modular design framework, and integrates modules developed with different programming language and ready-made modules. Firstly, introduce COM technology in brief, then design radar data processing software system framework, finally show the programming examples to explain how to define and refer the COM interfaces. The results show that using COM-based modular mixed language programming is an effective method to realize the radar data processing software system.
The Design Method Study of Double Reinforcement Beam Section
Authors: Zhang Tao , Cao Xian Lei
Published: April 2011

To simplify the reinforcement design process of double reinforcement beam section, the concept and application of double reinforcement bean section were introduced, and the appropriate application conditions of reinforced beam in practical engineering and the structural design requirements of beams with double reinforcement section designing were analyzed. The results show that the design value of the negative moment, the beam section size and strength grade of concrete shall meet his requirements of the structural design, then the relational expression is derived, applying this formula to judge whether they meet the preliminary requirements before the calculation of beam reinforcement. Compared with the engineering example shows that the design equations is more simple and accurate, but is the upper limit, and the results can provide a reference for the engineering design and related research.
Continuous Casting Mold Four-Link Vibration Mechanism Dynamic Simulation
Authors: Liu Xiao Bo , Li Yong Xue
Published: April 2011

Based on virtual prototyping technology, all mould vibration devices were framed in three-dimensional modeling, defining each components’ quality, center of mass, pairs connection between the components in the system, which representated truely mold four-link vibration device dynamic characteristic, implementing the dynamic behavior simulation. Kinematics law of the oscillation mechanism arose: Velocity and acceleration of the components in this vibration device were sine or cosine law functions.The angular velocity and angular acceleration of the components is proportional to amplitude. The angular velocity of the components is proportional to vibration frequency. The angular acceleration is proportional to the square of the changes in vibration frequency.
Motive Simulation on the Grinding Head of Ceramic Polisher Based on Matlab
Authors: Hu Wei Wen , Fen Jing Hua , Dai Zhe Min
Published: April 2011

Taking the polisher as the example，this paper described the process of precision ceramic polisher and built up the mathematical model for polishing process and simulation．First, it contrasted to single–single-grit grinding head in the grinder for the general motion and planetary motion .Second, it contrasted to multi-single-grit grinding head in the grinder for the general motion and planetary motion. The simulated model provides the convenience of adjusting process parameters with Matlab for comparison of polishing effects，thus it is of avail to the determination of polishing parameters and the control of polishing quality．
The Development of Online Examination System Based on B/S Structure
Authors: Yu Jin Ping , Chen Peng
Published: April 2011

With the development of Internet technology, online education colleges and companies have developed a WWW-based distance education system. The traditional examinations are moving towards online exams based on Internet. With the development of computer technology and the increasing popularity of computers, online examinations are gradually becoming matured. Traditional test methods have been unable to meet current test demands. All aspects of traditional test can be reduced to one or two links by Online Examination, greatly reducing the workload of teachers. This paper discusses the framework of the system, jsp technology and its working principle. Due to the shortcomings of traditional test methods, the objective, impartial, scientific and rational Online Examination system has a large reference value.
Analysis and Simulation of the Influence of Viscous Damping Coefficient on the Rigid Body Contact Force
Authors: Li Hu , Tang Wen Xian , Hu Zong Hua
Published: April 2011

According to the multi-contact solving problems of the mechanical system dynamics simulation software ADAMS, solving contact and influence of parameters setting on the results were studied based on the viscous damping theory. Researches focused on how the maximum damping coefficient affects the results of the system contact simulation in contact-solving process by connecting theory and practice. It provides some theoretical basis and practical experience for the study of multi-contact problems and had a certain amount of guidance on the multi-contact solving problems.
Zinc Chloride Content Analysis Methods and Special Reagent in Acidic Galvanized Solution
Authors: Wang Hong
Published: April 2011

In recent years, because the quality of chemical materials in markets exists large difference, we found concentrations of ZnCl2 unusually high, Cl- concentration not lower and a serious shortage of KCl concentration as using traditional methods to analyze the bath. This phenomenon occured frequent. The companies that had problems were recommended to take measures to dilute ZnCl2 concentration range in 60 ~ 80g/l and add KCl and H3BO3 to the normal scope according to analysis results. However, the old problems still remained when the adjusted solution was analyzed again. The concentration of each main salt cannot be exactly determined by traditional methods because of the serious impurity contamination in the acidic galvanized solution. The concentration of ZnCl2, KCl, H3BO3 in the bath were respectively tested by new analysis methods. A comparision of the results by new methods with those by traditional methods shows that the new analysis methods are simple, fast, and have low consumption, high accuracy and good effects in practical production.
A Control Method Study for a Class of Networked Control Systems Based on Wireless Sensor Networks
Authors: Zhang Jie , Bo Yu Ming , Ye Chang Bin
Published: April 2011

Considering a class of networked control systems built around wireless sensor networks (WSN), the control method is carried out when the output delays are present. Firstly, by studying the characteristics of data transmission with wireless sensor networks, the original system state vector was augmented, and the augmented state feedback control system was obtained. Secondly, the equation of the closed-loop control system was equal to the discrete switched system related to the hop count of the wireless transmission. Finally, a simulation example was given to demonstrate the effectiveness of the proposed method.
Oxidation Analysis of 304 Austenitic Stainless Steel Sheet after Intermediate Annealing
Authors: Han Fei , Lin Gao Yong , Wang Zai Lin , Peng Da Shu
Published: April 2011

Intermediate annealing to stainless steel can eliminate the residual stress, and improve plasticity and ductility effectively, but oxidation after different annealing processes has considerable difference. In this research, three annealing processes, low temperature annealing with ordinary heat treatment furnace, high temperature annealing with ordinary heat treatment furnace and high temperature bright annealing, were used to gain insight into the mechanics of intermediate annealing. Specimens of 304 austenitic stainless steel sheets were adopted in the intermediate annealing experiments which pre-deformation was 15%. The specimens’ surface microstructure were observed by scanning electron microscope (SEM), and the specimen oxidation, which happened in the annealing process, were also analyzed. The results show that bright annealing must be adopted in high temperature annealing.
Environmental Input and Output Analysis on the Solar PV Industry Chain of China
Authors: Zhao Jian Na , Li Xiang Nan
Published: April 2011

Current research on this chain doesn't focus not only on the overall environmental benefits of the chain by monetized quantitative analysis, but also on the environmental impact of the process. Research on the environmental effect of solar energy is just based on a single enterprise individual, rather than the whole industry chain. Paper describes and quantifies the impact of chain's operation on environment, does descriptive study on the developing trend of domestic solar energy and the environmental problems of it's chain, and analyses the environmental effect on the point of view of the environmental input and output of the China's solar PV industry chain.
The Synthesis and Feature of the Hydrogel Sensitive to PH/Electronic Field
Authors: Zhu Xiu Fang , Zhou Wei , Zhang Hong Xia , Nie Yu Jing
Published: April 2011

From the point of view of molecule design, a series of pH/electronic field responsive hydrogels were prepared based on the acrylic acid with the excellent pH and electronic field sensitivity. Studyed on the basic physical characteristic, like density, molecular weight, equilibrium water content, crosslink density and fixed charge density etc.discussed the effect mechanism and trends that ionic strength,pH value and electronic field to the swelling ratio of the hydrogels .
Martensitic Transformation Behavior of Ni54.75Mn13.25Fe7Ga25 Ferromagnetic Shape Memory Thin Film
Authors: Wang Hai Bo , Xiong Hao , Ma Li , Cai Wei
Published: April 2011

The Ni54.75Mn13.25Fe7Ga25 (at.%) ferromagnetic shape memory thin film was deposited onto silicon substrates using radio-frequency magnetron sputtering. The martensitic transformation, crystallographic structure, microstructure and magnetic-field induced strain were investigated by means of Differential Scanning Calorimetry (DSC), X-ray diffraction (XRD), Transmission Electron Microscope (TEM) and metal strain gauges. The results show that the martensite transformation temperature Ms is 296.6 K, the film with typical self-accommodated morphology is orthorhombic structure at room temperature. The field-induced strain of 52 ppm is obtained in this shape memory thin film.
Identification of Chinese Unknown Word Based on Finite Multi-List Method
Authors: Sun Bo , Huang Sheng Hui , Liu Xiao Hua
Published: April 2011

Unknown word is a kind of word that is not included in the sub_word vocabulary, but must be cut out by the word segmentation program. Peoples’ names, place names and translated names are the major unknown words.Unknown Chinese words is a difficult problem in natural language processing, and also contributed to the low rate of correct segmention. This paper introduces the finite multi-list method that using the word fragments’ capability to composite a word and the location in the word tree to process the unknown Chinese words.The experiment recall is 70.67% ,the correct rate is 43.65% .The result of the experiment shows that unknown Chinese word identification based on the finite multi-list method is feasible.
Evaluation Indicator Architecture Development for Industrial Automation Systems Using ISO15704 Annex B: GERAM
Authors: Li Jun , Li Qing , Zhou Jian
Published: April 2011

Nowadays, the Evaluation Indicator Architecture (EIA) is needed to measure the development level of Industrial Automation Systems (IAS). This paper provides a method to develop EIA for IAS based on GERAM. Starting from the different views of GERAM, the hierarchy structure and the content of Generic EIA is built using the idea of Key Success Factors. Then Partial EIA and Particular EIA can be obtained though derivation from Generic EIA.
A Hybrid Context Model for Pervasive Healthcare System
Authors: Ma Shou Ming , Wang Ru Chuan , Ye Ning
Published: April 2011

Pervasive computing applications aim to provide appropriate services that respond directly to their users and environments, with greatly reduced explicit human guidance. These applications usually adapt to changing failure-prone context information which was acquired from various sources that differ in quality and format. To efficiently acquire, share, correlate, and reason over raw existing context data, they must be modeled in a homogenous fashion. In this paper, we propose a hybrid context modelling approach, which attempt to integrate the advantages of object-oriented model and ontology-based model for their distributed context handling and efficient context reasoning respectively. We have applied this model to the development of a context management middleware which providing an extensible application framework for monitoring and assisting the elderly at home environments.
Research on Some Novel Functional Azobenzene Derivatives with Alkyl Chains and Different Substituted Groups
Authors: Jiao Ti Feng , Li Xu Hui , Zhou Jing Xin , Xing Yuan Yuan , Ren Jing
Published: April 2011

Two functional azobenzene derivatives with alkyl chains and different substituted groups have been synthesized and their photoisomerization have also been investigated. It has been found that depending on the alkyl chain and different substituted groups, the formed azobenzene derivatives showed different properties, indicating distinct regulation of molecular skeletons. UV and IR data confirmed commonly the characteristic absorption of alkyl chain and aromatic segments in molecular structures. Thermal analysis demonstrated that the structural influence of both compounds in different temperature ranges. The difference of thermal stability is mainly attributed to the formation of Schiff base group and different substituent groups in molecular structure. The photoisomerization of these compounds both in solution and in cast film can undergo trans-to-cis isomerization by UV light irradiation, depending on different substituted groups. The present results have demonstrated that the special properties of azobenzene derivatives can be effectively turned by modifying molecular structures of objective compounds with proper substituted groups, which show potential application in functional material field.
Spectral and Thermal Investigation of Novel Glycine-Based Schiff Base Derivative and its Metal Complexes
Authors: Jiao Ti Feng , Zhou Juan , Zhou Jing Xin , Xing Yuan Yuan , Li Xu Hui
Published: April 2011

A novel glycine-based Schiff base derivative (abbreviated as C16GlySb) containing long alkyl chain was synthesized from glycine reacted with 4-cetyloxy-2-hydroxybenzaldehyde and sequentially coordinated with various metal ions to give the corresponding metal complexes (abbreviated as G-M). The products were characterized by UV-Vis spectra and FT-IR spectra. At the same time, the thermal stability was measured by TG-DTA instrument. FT-IR analysis indicated that the nitrogen atom in imino group, oxygen atom in phenolic hydroxyl group, and carboxylic ion participated in coordinating with transition metal ion in doubly-bridged mode. UV spectra showed that compared with ethanol solution, the cast film on quartz plate showed H-type or J-type aggregate structure. In addition, the thermal stability of G-M had been obviously superior to that of the ligand C16GlySb. The present results have showed potential application in fields of functional material and catalyst.
Analysis of the Acoustic Performance of Automotive Exhaust Muffler and Optimization of its Structure
Authors: Zhu Ming Yi , Liu Qing
Published: April 2011

The noise of exhaust muffler is one of the key factors of the noise of the whole car. As a key member in reducing the exhaust noise, its performance directly influence the smoothness of the car. By establishment of simulation model of coupling of engine working process and muffler the plug-in loss and pressure loss are obtained. The result of simulation calculation is basically the same as that of actual test. The measures to optimize the structure of the muffler proposed based on the study have achieved relatively satisfactory effect.
Study on the Software Defects Using Positive and Negative Association Rules Based on Multiple Minimum Supports
Authors: Shen Yan Guang , Shen Jing
Published: April 2011

We analyzed the attributes of software defects, and proposed a method of positive and negative association rules based on multiple minimum supports to research on software defects. The application in the software indicated that this method can discover rules of higher quality, fewer errors and conflicts without suffering from combinatorial explosion and missing some less-supported or recessiveness rules.
A New Clustering Algorithm Partition K-Means
Authors: Chen Min , Yin Chan Juan , Xi Yu Ping
Published: April 2011

K-means is a classic algorithm of partition clustering, its speed is very fast, well, the clustering result is very sensitive to the initial cores. As a result, algorithm K-means does not always get the Global Optimization. To solve this problem, this paper proposes a new algorithm partition K-means, which selects the initial cores with a partition method and then cluster the data set with K-means. The experiment shows that the new algorithm gets better effect and better efficiency than the original algorithm K-means.
Ploidy Determination of Parthenogenetic Artemia by Flow Cytometry
Authors: Wang Su Feng , Wang Yan
Published: April 2011

The ploidy of parthenogenetic Artemia from Aqqikkol Hu (Xinjiang) was determinated by flow cytometry. The results showed that the Artemia populaton of Aqqikkol Hu (Xinjiang) consisted diploid and tetraploid, the rate of diploid and tetraploid approximated to 80% and 20% respectively. It should conclude that the results of ploidy of parthenogenetic Artemia can be determinated rapidly and exactly by flow cytometry. The new method for the ploidy determination of parthenogenetic Artemia should accumulate the basic data for biological study and application of Artemia.
Fatigue Damage Accumulation Model and Fatigue Life Predication of Composite Laminate T300/ Epoxy-Resin
Authors: Wang Lei , Sui Tian Zhong , Lin Wen Qiang
Published: April 2011

The Fiber Reinforced Plastic (FRP) has been widely used in aircraft, spacecraft, watercraft and transportation because of its excellent mechanical characteristics. The fatigue characteristic of the composite laminate of FRP is important guarantee to the structure security and reliability. In this paper, according to the damage mechanical theory, a fatigue damage accumulation model based on stiffness degradation and the corresponding method of fatigue life prediction are presented. The composite material of T300/ epoxy-resin with high performance has been investigated. The tension-tension fatigue tests have been conducted on the composite laminates. The fatigue life prediction of the composite material is presented. It shows a good agreement to the experimental and theoretical results.
Design and Implementation of the RF Front-End All-Digital Phase-Locked Loop in the UHF RFID Reader
Authors: Wang Yan Liang , Wang Gui Tang , Liu Wen Juan
Published: April 2011

PLL is an important part of the RF front-end module,its performance is directly related to stability and accuracy of the RF base-band signal extracted. A FPGA-based all-digital PLL is implemented in this thesis, Hilbert digital phase detector (HDPD) ,Numerically controlled oscillator (NCO) and FIR digital loop filter module implemented using Verilog language ensure accuracy and stability to Sample input Baseband signal modulated. The experiments confirmed that the all-digital PLL designed in this thesis can overcome the defects of DPLL based on semi-analog circuits; and has high Operating frequency, exact capture time, precision adjustable, simple interface, and so on; can be widely used in radio frequency identification (RFID) and automatic control system.
Machinability of ZTC4 Titanium Alloy Analysis Using Finite Element Simulation and Milling Experiment
Authors: Liu Chang Yi , Tang Zhi An , Yang Sheng , Liu Wen Wen , Lu Yuan Dong
Published: April 2011

In this paper Finite element methods (FEM) and cutting experiment were used to investigate the machinability of titanium alloy ZTC4 (cast Ti6Al4V). Machinability was evaluated as cutting force, temperature, and surface roughness. Two-dimension (2D) and three-dimension (3D) machining process FEM models were established. Material constitutive applied Johnson-Cook model synthesizing elastic and plastic deformation. Chip separated criteria adopted arbitrary Lagrangian Euler (ALE) algorithm. Heat generation source included the rake face chip flow under conditions of seizure and chip/tool friction, clearance face tool/workpiece friction. 3D discrete milling tool was modeled and the milling process was simulated. The ZTC4 milling experiments were designed and carried out with same cutting conditions of the 3D FEM simulation. The results of FEM simulation and the experiment were compared and analysed. The influences of the machining variables to the machinability of ZTC4 were discussed.
The Covered Operation of Absolutely Grey Number and Grey Power Function
Authors: Li Qiao Xing , Yang Jian Mei
Published: April 2011

Absolutely grey number and grey function are important parts of grey mathemtics and the core is the covered operation. We defined absolutely grey number and proposed its covered operation, and the computational formula of grey power function is also obtained. The computable techniques may improve the human abilities to control the phenomenon of noise and vibration in real applications.
Dynamic-Pseudo-Random Test Sequence Generation Technique with Low Power Consumption
Authors: Zheng Sheng Jia , Liu Jian Jun , Li Tie Jun
Published: April 2011

In order to provide low power consumption LFSR seed for BIST structure，this paper proposed a seed calculation Methods of dynamic-pseudo-random test sequence, it can reseed for LFSR and cut off test sequence of the low fault coverage effectively. The seed can generation fixed length pseudo-random test sequence, the sequence reduce test time and number of test vectors mostly. Experimental results that this technique can reduce the length of vectors, shorten test time and low power consumption based on without reduce the fault coverage
Forefoot Plantar Pressure Distribution Character during Inversion Position
Authors: Su Xiao Xiang , Gu Y.D. , Ruan Guo Qing , Ren Xue Jun
Published: April 2011

This study analyzed the plantar pressure distribution character as the foot position between normal to inversion. Eight healthy male volunteers have participated in the test with the foot position from normal to 20 inversion angles which controlled by wedges. The results of this test showed that the centre of the pressure was clearly transferred from centre to lateral side when the foot position was changed from normal to inversion. In addition, the contact area varied largely between the normal and inversion condition, but changed a little between two inversion loading situations. The finding of this study suggests that the foot injuries could attributed to more of inappropriate foot positioning than the magnitude of loading force.
A Novel Approach for Automatic Tongue Deviation Analysis with Auto-Correction
Authors: Zhu Ming Feng , Du Jian Qiang , Zhang Kang , Ding Cheng Hua
Published: April 2011

The article analyzed the old tongue deviation analysis method and introduced a new tongue deviation analysis method with auto-correction aiming at the shortcomings in the old method. This method overcomes the shortcoming that the old method utilized area symmetry to extract central axis and we utilizes the method of shape symmetry analysis to improve the accuracy. In comparison experiment, this method is more accurate than the old one and its efficiency is higher than the old one.
New Dynamic Jiles-Atherton Hysteresis Model for Giant Magnetostrictive Material
Authors: Li Xin Xin , Zhou Wei
Published: April 2011

To set-up a rate-dependent dynamic hysteresis model, eddy current loss in giant magnetostrictive material is represented by the loss in eddy current impedance. By combining static Jiles-Atherton hysteresis model, the equivalent circuit of giant magnetostrictive material is built, the relationship between eddy current impedance and magnetic field and magnetization is derived and the maximum eddy current impedance of the material is clculated. Effective magnetic permeability is applied to estimate the eddy current impedance as exciting rate or frequency gets high. Simulation and experiment results of exciting frequencies at 5Hz,10Hz,20Hz, are compared, showing experiment results are coincident with simulation ones, in term of magnitude order and tilt direction. It is demonstrated that effective permeability is feasible for eddy current impedance estimation and eddy current impedance-based dynamic Jiles-Atherton hysteresis model is able to reflect practical dynamic hysteresis.
Theoretical Investigation of the Adsorption of Nh3 on B-Doped Graphene
Authors: Bi Dong Mei , Qiao Liang , Hu Xiao Ying , Zhi Wen
Published: April 2011

The geometrical structures, the electronic structures, and the NH3adsorption properties of pure and B-doped graphene have been investigated using density-functional theory. The density of states (DOS) of pure and B-doped graphene, the adsorption configurations and the adsorption energies of NH3adsorbed on pure and B-doped graphene, and the charge transfer between NH3and B-doped graphene have been calculated in details. The results indicate that boron doping can enhance the DOS at the Fermi level and slightly enhance the physical adsorption of NH3on the surface of graphene. Furthermore, the doping of boron can result in the charge redistribution of graphene, which can induce the charge transfer between NH3and graphene and change the transport properties of graphene.
The Research of Key Frame Extraction Technique Based on Video Content
Authors: Zhe Wei
Published: April 2011

Key frame extraction is the precondition and fundamental of the video retrieval and video analysis. The method of key frame extraction determines the final result of video analysis. Firstly, the paper introduced the basic theories and principles of the Key frame extraction technology. Secondly, examined the typical method of key frame extraction techniques of video based on non-compression domain and compression-domain in detailed, at the same time, the evaluation and comparisons of the methods are made by experimental. Thirdly, the summarization is given and the prospection of Key frame extraction in the future is made in the end of paper.
Research on Multi-Threshold Color Image Segmentation Based on Rough Set
Authors: Zhang Guo Quan , Li Zhan Ming
Published: April 2011

Aims at the problem that the threshold number and value are difficulty to determine automatically existing in multi-threshold color image segmentation method, a novel method of multi-threshold segmentation in HSV is proposed. First of all, the image is pre-processed in HSV, component H and V is projected to S and be quantified at the same time. Secondly, histogram and advanced Histon histogram (AHH) are constructed. According to concept of roughness in the theory of Rough Set, the histogram of roughness (RSH) is constructed. Finally, according to requirement of segmentation accuracy, set a threshold Hn on RSH to determine the number and scope of multi-threshold and the image is segmented with above thresholds. The experimental results show that this method can determine the threshold quantity automatically, segment image efficiently and robust against illumination variation.
Rule Anomalies Detection in Firewalls
Authors: Liao Xiao Ju , Wang Yi , Lu Hai
Published: April 2011

Firewall is the most prevalent and important technique to enforce the security inside the networks. However, effective and free anomalies rules management in large and fast growing networks becomes increasingly challenging. In this paper, we use a directed tree-based method to detect rule anomalies in firewall; in addition, this method can track the source of the anomalies. We believe the posed information will simplify the rules management and minimizing the networking vulnerability due to firewall rules misconfigurations.
Chaotic Control in a Fractional-Order Modified Van Der Pol Oscillator
Authors: Gao Xin
Published: April 2011

The dynamics of fractional-order systems have attracted increasing attention in recent years. In this paper, we study the chaotic behaviors in a fractional-order modified van der Pol oscillator. We find that chaos exists in the fractional-order modified van der Pol oscillator with order less than 3. In addition, the lowest order we find for chaos to exist in such system is 2.4. Finally, a simple, but effective, linear feedback controller is also designed to stabilize the fractional order chaotic van der Pol oscillator.
A New Method for Parameters Extraction of Extruded Surface
Authors: Yan Luo Heng , Huangfu Zhong Min
Published: April 2011

The purpose of reverse engineering is to convert a large points cloud into a CAD model. Parameters extraction for extruded surface from measure data is an important problerm in reverse engineering. Extruded direction is a crucial parameter of extruded surface. In this paper, random sampling consensus algorithm combined with Least-Squares method is used to extract the extruded direction of extruded surface. Experimental results show effectiveness, robustness and accuracy of this proposed approach.
An Algorithm of Leaf Image Segmentation Based on Color Features
Authors: Bai Jie Yun , Ren Hong E
Published: April 2011

The paper proposes a digital image extraction and segmentation algorithm based on color features. The traditional transformation from RGB model to HSI model is improved, meanwhile the leaf color information is extracted by similarity distance between pixels. The green component of leaf image in the RGB model is strengthened, and then the digital image is transformed to the HSI model by the improved method. Finally the image is divided by similarity distance of pixels’ H weight which determines whether the pixel belongs to the blade. The results of simulation experiment shows that this algorithm can achieve a good image segmentation effect, and it has a high degree of accuracy as well as a clearly distinguish degree and many other advantages such as good consistency with human visual system. It completely meets the effectiveness and clarity requirements of image segmentation.
A Disquisition on Traffic Noise Pollution and its Effective Control as Countermeasures
Authors: Sui Rui Qiang
Published: April 2011

Traffic noise pollution does great harm to human health and brings huge damage to environment. This paper is aimed specifically at the issue of traffic noise pollution and its hazards, introducing three major types of noise pollution, exploring the causes for traffic noise pollution, and puts forward feasible prevention and treatment as countermeasures by analyzing the characteristics of each particular type of noise pollution to achieve a more healthy and sustainable transportation system.
Research on the Asphaltene Structure and Thermal Analysis in Catalytic Aquathermolysis of Heavy Oil
Authors: Zhao Fa Jun , Liu Yong Jian , Wu Yi , Si Yong , Zhang Bo , Wu Hong Rui
Published: April 2011

As an irreversible viscosity reduction way, catalytic aquathermolysis of heavy oil is given close attention by scholars at home and abroad, and a high content of asphaltene in heavy oil is the major cause for the high viscosity of heavy oil. Through the use of IR spectrum and TG-DTA, this paper analyzes the asphaltene structure and thermal analysis before and after the catalytic aquathermolysis reaction, and the result shows some changes in the heavy component structure in the asphaltene after the reaction, a reduction in some unsaturated structures, an increase in saturated structures, a reduction in long-chain structures, an increase in short-chain structures, and an increase in light components. Thermal analysis shows that part of the asphaltenes can be converted into alkane soluble substance. The catalyst acts on the heteroatoms in asphaltenes, which partly changes the asphaltene structure and makes it cracked to some extent, so as to lead to the lower viscosity of heavy oil.
The Wireless System of Data-Acquisition of Temperature Based on Radio Frequency
Authors: Mo Kai , Sun Qi Liang , He Hong , Zhang Da Jian , Hou Ming Feng
Published: April 2011

The data-acquisition of temperature is widely used in industrial control, household appliances, medical care, and other important areas often using the data acquisition. For industry, household appliances, and other unsuitable for the traditional wireless data acquisition situation, this paper presents a wireless system of data acquisition of temperature based on radio frequency, and the system can avoid a cable transmission’s the inherent high-cost, long production cycle, the restricted number of transceiver devices such shortcomings . This paper presents the principle, the major flow chart, features system which is mainly made up of MCU ATmega8 and RF chip nF905. Experiments show that this is the accurately and efficiently system of temperature data wireless acquisition and transmission.
Studying the Rock Seepage Parameters Identification Method Based on Finite Element Method and Difference Evolution Arithmetic
Authors: Song Zhan Ping , Jiang An Nan , Zhang Jiao
Published: April 2011

The seepage of rock and soil is a common problem in geotechnical engineering, because of the uncertainty property of rock and soil, how to ascertain the seepage parameter of rock and soil becomes a problem to solve. Aiming to the problem, after introducing the theory of seepage parameter identification, the paper combines unstable seepage finite element method (FEM) and difference evolution (DE) arithmetic, constructs intelligent identification FEM method of seepage parameter, and develops the procedure. The hydraulic head distribution of seepage field can be calculated accurately by FEM and the optimal solution can be obtained by DE, the seepage FEM being embedded in DE, overcoming the local optimization problems of conventional methods and improving the precision of identification. A tam sample is calculated by the method, it states that the convergence speed is quick and result is satisfied. It is a powerful method for seepage parameter identification.
Energy Analysis of Vesicle Fusion by Dissipative Particle Dynamics Simulation
Authors: Wu Shao Gui , Guo Hong Xia
Published: April 2011

A dissipative particle dynamics simulation method is used to investigate the vesicle fusion behavior in this study, especially to probe the driving force for vesicle fusion. Based on the former study, the fusion mechanism is investigated from the point of conservative energies. It is found that the total energy is decreasing during vesicle fusion, which is mainly caused by the reduction of conservative energy. Through further exploring the six interaction energies of particle-pairs, it is demonstrated that the energy reduction is attributed to the interaction energy between water and amphiphiles. The pressure variation confirms that vesicle fusion is a process of energy releasing.
Friction and Wear Behavior of Structural Ceramics Sliding against Bearing Steel under Vacuum Condition
Authors: Tong Yong Xing , Wang Li Qin , Gu Le , Peng Bo
Published: April 2011

The friction and wear behavior of Si3N4, SiC and ZrO2 sliding against M50 bearing steel under vacuum condition at various applied load were investigated. The results showed that the properties of different ceramic materials cause the difference in wear behaviors. The coefficient of friction was lowest in SiC and M50 bearing steel couple than other cases for graphitic carbon replaced carbidic carbon at the worn layer of SiC. The specific wear rate of ZrO2 was highest and the lowest was Si3N4. The ceramic ball materials have transferred on M50 bearing steel surfaces and tribofilm consistently formed on the ceramic balls wearing surfaces. Dominant wear behaviors for three structural ceramics were adhesion abrasion, plastic deformation and brittle fracture. The couple with Si3N4 and M50 showed the best operating conditions for friction and wear resistance under higher applied load.
Evolution of Effective Short Fatigue Cracks Density of LZ50 Axle Steel
Authors: Yang Bing , Zhao Yong Xiang
Published: April 2011

Short fatigue crack density evolution on specimen surface of railway LZ50 axle steel is studied experimentally by local and overall viewpoints, respectively. Results indicate that the density of effective short fatigue cracks (ESFCs) around dominant crack, which results in the specimen failure, evolutes sensitively to the changes of the dominant crack size and tip locations. In accordance with the previous criterion of ESFCs, this density evolution is more suitable for describing the intrinsic and dynamic localization and randomization of fatigue damage. At the same time, statistical deriving is applied to address the randomness of the evolution behavior. It is revealed that the density data increases with the dominant crack growth in the micro-structural short crack (MSC) regime, and keeps declining in the physical short crack (PSC) regime. Coefficient-of-variations exhibit a contrary tendency. Appropriate distribution is further determined using a previous comprehensive statistical comparison method. Random characters and quantitative measurements of the density data have been well depicted.
Multimedia Teaching Problems and Countermeasures Research on PE Major in Chinese Colleges
Authors: Li Meng Long , Ma Wei Ping , Li Yi Xiang , Tan Ze Liang
Published: April 2011

Through the research on the existing problems of Chinese colleges PE major in the process of developing multimedia teaching, the paper finds out the problems in following aspects.The insufficient leading officials’ concern, the insufficient hardware facilities and equipments, lack of matching software and lower teachers’ operation ability. Moreover, it also puts forward the relevant countermeasures to promote the application and popularization of multimedia teaching methods in PE teaching. This research will further promote modern teaching reform of PE major, optimize the PE teaching class, improve PE teaching quality and plays a certain role.
Effect of Different S/In Ratio on Properties of In2S3 Films Prepared by Ultrasonic Spray Pyrolysis Method
Authors: Zhang Xiao , Wang Hua , Xu Ji Wen , Yang Ling , Ren Ming Fang
Published: April 2011

In2S3 thin films have been prepared on heated glass substrates by ultrasonic spray pyrolysis method. Structure, surface morphology and properties of films with different S/In ratios have been investigated. XRD analysis demonstrated that as-prepared In2S3 thin films have a preferential orientation along the (220) direction and no other phases are observed. Uniformity, density, crystallinity of films were significantly affected by S/In ratios, which influence photoelectric properties of the films. In2S3 thin film is close to standard stoichiometric composition when S/In ratio is 2. Optical transmittance of films is over 90% in the visible region and its energy band gap come up to 2.46eV.
Influence of the Fineness of Micro-Fines on the Performance of Cement and Mortar
Authors: Zhou Wen Juan , Niu Wei , Chen Jia Long , Ji Gui Bin
Published: April 2011

With the rapid development of fundamental construction, natural sand resources is getting less and less, artificial sand has become a new kind of sand source. Artificial sand’s production can produce a certain amount of aggragate micro-fines, rational use of micro-fines will be an important factor about affecting application of artificial sand. In this paper，impact of fineness and volume of artificial sand on cement and mortar performance is studied systematically, provides technical basis for the effective use of micro-fines. The experimental results show that micro-fines decreases water requirement of normal consistency and shorten setting time of cement, appropriate fineness micro-fines will reduce water requirement, improve strength, less shrinkage of mortar. The pore structure results show, finer micro-fines refines the pore structure, reduces the porosity of mortar.
Research on the Effect of Polycarboxylate Superlasticizers on Reheology Properties of Compound Cementitious System
Authors: Wang Dong Min , Liu Zhi Hua , Xiong Wei Feng
Published: April 2011

The rheological property is the best method which can directly reflect the dispersion property of polymer surfactants. In this paper, the rheological properties in the systems of pure cement, cement/fly ash and cement/silica fume with polycarboxylate superplasticizers of different molecular structures were studied. The effect of molecular structure on shear sress, apparent viscosity and thixotropy in compound cementitious systems was expatiated. At last, the rules of mineral admixture to the system’ rheological property and the relations between adsorption amount and rheological properties were put forward.
Research on Set Retarder of High and Super High Strength Alkali -Activated Slag Cement and Concrete
Authors: Yang Chang Hui , Wu Fang , Chen Ke
Published: April 2011

The set of alkali-activated slag cement (AASC) and concrete and the measures for set-retarding were reviewed. Due to the fast set of high and super high strength alkali-activated slag cement and concrete, an inorganic compound set retarder YP-3 was developed. The effect of the retarder on setting time and strength as well as heat evolution of AASC were tested, and the mechanism of the retarder was analysed. Results show that the retarder can regulate the initial set of high strength AASC in the range of 29hrs with little negative effect on its strength development. The retarder could react with silicate ions from liquid to rapidly form a compact film in early age of hydration of AASC, the film covered the surface of slag and obstructed R+ and OH- in contact with slag particle directly. Consequently the set of AAC was delayed.
A Study of Stabilizer for Saline Sludge
Authors: Li Zhan Guo , Cheng Yin , Huang Xin , Shen Xiao Ming
Published: April 2011

There is large-area saline sludge which should be stabilized in China. However when cement is used as a stabilizer the strength and stabilization effect on the soil is relatively poor. In this paper, In this paper Portland cement PC is compared to a soft soil stabilizer A developed by the authors for use in stabilizing chloride saline soil from the Tianjin Binhai New Area. The strength of stabilized soil was tested by comparative Analysis, and XRD and SEM tests were used to analyze the hydrate types in stabilized soil. Preliminary tests results suggest that the salts present in hydraulic sludge and stabilizer A were able to react and formed a new hydrate----- Ca4Al2Cl2O6 • 10H2O which cannot be produced by cement alone, and which can greatly increase strength of stabilized soil.
Effects of Internal Curing by Super Absorbent Polymer on Shrinkage of Concrete
Authors: Pang Lu Feng , Ruan Shi Ye , Cai Yong Tao
Published: April 2011

This paper focuses on the shrinkage of concrete, influenced by the different mixing amount of super absorbent polymer—SAP and extra-water. The experiment showed that the SAP-cement-mortar shrinkage is reduced greatly by mixing SAP. Extra-water can improve the function of reducing shrinkage of SAP. When the amount is 20, the shrinkage is lest, account for 57% of blank group’s. The SAP has well effect on the cement mortar shrinkage. Besides, we found that the strength of this group account for 89% of blank group. So the proper amount of SAP and extra-water has poorly influence on the strength of concrete.