bluuebunny/crossref_metadata_2025 huggingface dataset:
ANN-Based Feature Recognition to Integrate CAD and CAM
Authors: Hao Yong Tao , Chi Yong Min
Published: May 2011

This paper presents an intelligent manufacturing feature extraction method employing artificial neural network techniques. It discuss the subject about how to represent the features as the input expression of the ANN(Artificial Neural Network), how to determine the structure of ANN and the ANN-based feature recognition method. This method is mainly used pre-trained BP neural network to identify the B-rep model representation of the product. Through a lot testing, the validity of the system was verified.
A Study of Real Time Security Monitoring of Commercial Vehicles Using a Microscopic Traffic Simulation Model
Authors: Wang Hao , Cheu Ruey , Lee Der Horng
Published: May 2011

This paper involves a study of a real-time system for monitoring the security of commercial vehicles in road networks. Embedded in the security monitoring system is a commercial vehicle tracking and incident detection algorithm which relies on a combination of vehicle telemetry data obtained from Global Positioning Systems and on-board sensors to continuously monitor the route choice and car-following behavior of the driver. The performance of this algorithm has been tested in a microscopic simulation model, on a set of hypothetical scenarios, which included deviations from the approved routes, forced to travel at unreasonably low speeds, or even stopped at unexpected places in the network. The initial results indicate that the proposed system has good potential in detecting abnormal driving behaviors, with 100% detection rate, 6.0 seconds of mean detection time, and less than 1% false alarm rate.
A New and High-Accuracy People Counting Algorithm
Authors: Hu Tao , Luo Hao Jia , Wang Ting , Zhu Li
Published: May 2011

The people counting algorithms are widely applied in many areas. The algorithms may have lower counting accuracy or higher time complexity. To improve that, a new and high-accuracy people counting algorithm is proposed in this paper. It analyzes a background image and series population original images to calculate an average proportion for one person and create a two-dimensional table. Then it uses the average proportion and the two-dimensional table to count the number of people in test images. And two thresholds are adopted to regulate accuracy in counting.
The Existence of Fixed Point for a Generalized 3x+1 Function
Authors: Liu Shuai , Che Xiang Jiu , Wang Zheng Xuan
Published: May 2011

In order to study generalized 3x+1 function C(z), we find the character of fixed points of C(z) at real axis by complex analytical analysis. Then we improve the solving algorithm of its fixed points. We proved that the integer fixed points of C(z) are 0 and -1 and the attract fixed points of C(z) are 0 and -1.2777. Popularized the result to complex plane, we prove that there is no fixed point of C(z) except real axis. We draw the fractal figures of C(z) by escape time algorithm to prove the result and give a conjecture from the fractal figures. The conjecture guess that the attract domain of C(z) is a connected domain which is connected with single point.
The Prediction of SO2 Pollutant Concentration Using a RBF Neural Network
Authors: Wang Cheng Yuan , Zhang Wen Yu , Wang Ju Jie , Zhao Wen Fang
Published: May 2011

Air pollution may cause pernicious effects on human health, and is a widespread problem in the world. Air quality management systems have became an important research issue with strong implications for inhabitants’ health. Monitoring and forecasting of air quality indicators plays an important role in the management systems. Artificial intelligent techniques are successfully used in modelling of highly complex and nonlinear phenomena. In this paper, a model, which is radial basis function (RBF) neural network, is established to estimate the impact of meteorological indicators on SO2. The proposed model achieves 9.91% in mean absolute percentage error (MAPE) compared to real observation data sequence. For air quality, it could be a promising candidate for forecasting the air quality indicators data sequence.
Clustering Chinese Web Search Results Based on Association Calculation
Authors: Zhao Ying , Du Ya Jun , Peng Qiang Qiang
Published: May 2011

Clustering web search results is a kind of solution which help user to find the interested topic by grouping the search results. This paper presents an improved method for clustering search results focused on Chinese web pages. The main contributions of this paper are the following: First, in this paper, a method which identifies the complete semantic information phrase by comparing the attributes of base clusters in the suffix tree document model and the overlap of their document sets is presented. Second, by analyzing the content and structure of title and snippet of Chinese web search results, one way of sentence segmentation is designed and implemented to constructing suffix tree. Third, In order to better respond to the associate degree of terms, a novel method is proposed which compute the distance in sentence-grain of terms' co-occurrences. Finally, the experiment illustrates that the new clustering method provides an efficient and effective way for user browsing and locating sought information.
Study on Bonding Capacity of Modified Glued Structural Lumber for Bridge Deck Based on China Southern Plantation
Authors: Li Jing Hao , Zhou Xian Yan , Zhang Zhong Feng , Wang Zhi Feng , Peng Wan Xi
Published: May 2011

In order to select the optimal modification method of fire-retardant preservative formulationtion ratio for glued structural lumber of wood-based bridge deck by analysing the bonding strength of experimental samples. Through range analysis, the experiment results showed that: the mode of the best fire-retardant preservative formulationtion ratio was 45ml/(40cm×40cm) preservative, 1g/(40cm×40cm) flame retardant and 18h soaking time of adhesion. And the glued structural lumber had enough bonding strength under high flame-retardant properties, which was fit to make glued structural lumber for wood bridge.
The Influence of Argon Pressure on the Structural and Physical Properties of LaB6 Films
Authors: Zhao Xiao Hua , Min Guang Hui , Xu Jing , Lin Jie
Published: May 2011

Lanthanum hexaboride (LaB6) films were deposited on Si (111) substrates by magnetron sputtering method. The characterization of the films was investigated by means of atom force microscopy (AFM), X-ray diffraction (XRD), four-point probe electrical resistance measurement, scratch tester and nano-indentation tester. Influence of argon pressure on physical properties, such as crystallization degree, conductivity and mechanical properties was studied. All the films were smooth and dense. The film crystallites showed a preferential orientation of (100) plane, but the films which were deposited at 2.0 Pa exhibited amorphous structures. LaB6 films which were deposited below 1.5 Pa had excellent conductivity. The bonding strength of the films which were deposited at 1.0 Pa was higher than the others due to the formation of the nano-sized crystals. The hardness and elastic modulus were investigated in connection with the crystalline of LaB6 films. As a result, the films which were deposited at 1.0 Pa had a maximal value of hardness (16.782 Gpa) and elasticity modulus (193.895 Gpa). In a word, the LaB6 films which were deposited at 1.0 Pa have a higher degree of crystalline and more excellent physical properties in comparison with the others. The obtained results will be used synthesizing LaB6 films for applications in low-temperature thermoelectric devices.
Extension Model of Influence Diagrams
Authors: Peng Qing Song
Published: May 2011

An influence diagram is a kind of graphical model that can represent both the probabilistic relationship between variables and can easy to make decisions. It can make full use of Bayesian Network and Decisiton Tree. Influence Diagram should be modify to inprove the effiency to express relationships among variables. Extensional model of Influence Diagrams is introduced in this paper to express the new kind influence diagrams. And this kind of new model can be applied in the area of supply chain management.
Research on the Maintenance Technology of Network Production Equipments and its Application
Authors: Li Wei
Published: May 2011

In a network production enterprise, if some complex faults happen, it may be possible of resulting in huge economic losses. For resolving real problems in modern manufacturing enterprises, a remote B/S maintenance pattern is designed for manufacturing network equipments by adopting some core information technologies, by the use of knowledge reason and data management view, some remote maintenance support technologies of maintenance decision suitable for network equipments have been minutely analyzed and constructed, finally in some practice the advantage and efficiency for manufacturing network equipments about this network maintenance way have been tested and verified with improved and better services.
Study on Similar Case Determination of Personalized Recommendation System
Authors: Sun Jie Li , Zhu Zhi Qing , Mei Yong
Published: May 2011

The quality of the recommended results will depend on the determination policy of the case similarity, case retrieval policy and personalized recommended policy based on case reasoning. The case similarity determination strategy is one of the important link to design the personalized recommendation system. This paper studies the case similarity determination method of the personalized recommendation system based-CBR . And the similar determination method based on similar case characteristic vector are discussed and the relevant algorithm is given.
Study on Burnout and so2 Emission Characteristics during Co-Combustion of Petroleum Coke and Oil Shale in a Fluidized Bed
Authors: Lu Wei Qun , Fang Ding Ye , Yang Zhi Yong
Published: May 2011

The effects of several factors, including fuel mixing ratio fed into boiler, bed temperature, primary air ratio, on burnout characteristics of mixed fuel of petroleum coke and oil shale were investigated at a 1 MW circulating fluidized bed (CFB) test apparatus at Xi’an Thermal Engineering Research Institute. Meantime, the effect of the fuel mixing ratio and Ca/S molar ratio on SO2 emission during co-combustion of petroleum coke and oil shale were studied. The results show that preferred mixing ratio of petroleum coke over oil shale is between 4:6 and 5:5, and primary air ratio is about 55% to accomplish favorable burnout of the mixed fuel. The combustion efficiency is higher than 97%. The increase in oil shale share in the mixture helps to improve the desulfurization efficiency during co-combustion. There is an optimum Ca/S molar ratio to achieve the highest desulfurization efficiency for co-firing the petroleum coke and oil shale. SO2 emission during co-combustion of petroleum coke and oil shale can meet the environmental requirement.
Preparation and Characterization of Ionic Liquild Modified Clay and its Application in Polypropylene/Clay Nanocomposites
Authors: Wang Li Mei
Published: May 2011

Clay was organically modified with one kind of ionic liquild. Organical clay obtained was used to prepare poly(propylene) (PP)/clay nanocomposites by solution blending. Flourier transform infrared (FTIR), wide-angle X-ray diffraction (XRD) and thermogravimetric analysis (TGA) revealed that the ionic liquild was loaded in the galleries of organically modified clay. TGA result show the thermal stability of organically modified clay was superior to clay. XRD patterns indicated that the d-spacing of clay layers increased to 2.96 nm from 1.22 nm of clay. XRD patterns of PP/clay nanocomposites show that clay layers were dispersed in PP matrix by nanometer size.
The Behavior and Effect of Nano-Copper on the Interface in the Process of Sintering Fe-Base Powder Metallurgy Parts
Authors: Zhang Xiao Yu
Published: May 2011

The tested samples by adding 1.0% nano-copper powder and Fe-base powder mixed with globe grind violently are sintered at 600, 650, 700, 750, 800, 850°C, and keeping temperature 30 minutes and 1, 2, 3, 4 hours at 600°C. The nano-copper morphology changes of impacting fracture surface are observed by scan electrical microscopy (SEM). The results showed that the nano-copper particles occur adsorption rapidly, diffusion and dissolution at Fe-base powder particle interface with increasing sintering temperature at the same keeping temperature times and extending keeping temperature times at the same sintering temperature. The nano-copper particles grow up by reunite and existing unconventional growimg up critical temperature Tc. The nano-copper particles dissolve at the nano-Fe powder surface at the lower sintering temperature, and decreasing the sintering temperature to 920°C.
Motor Vehicle Longitudinal Performance Roadway Test System Based on CAN Technology
Authors: Zhang Xiao Long , Li Liang , Sheng Dan Dan , Song Jian
Published: May 2011

Based on the microcontroller C8051F340, a roadway test system was designed for motor vehicle's longitudinal performance testing, such as acceleration and braking performances. The sensing device was comprised of GPS system, braking switcher, steering angle sensor and combined sensor, etc. The last two sensors were selected from vehicle electronic stability control system ( ESP ), which offer CAN (Controller Area Network) interface and all the data update frequency was 100 Hz. The GPS device's data update frequency is only 1 Hz, but its accuracy of speed measurement is 0.1 km/h. In order to get the precise travel distance and 100 Hz speed information, a data fusion algorithm was employed based on the speed information from GPS and the vehicle longitudinal acceleration information from the combined sensor. These sensors were selected according to the requirements of the laws and regulations of vehicle performance test. All the sensors' interface protocol, system hardware design, microcontroller and portable computer's program design were introduced in detail. Finally, a confirmatory road test was conducted to verify the system’s correctness and reliability. With those advantages of low cost, expandable interface (CAN bus) and moderate accuracy, the designed system can offer an advanced test platform for the research of vehicle braking and acceleration performances.
A Hybrid Method Based on HITS for Literature Recommendation
Authors: Zhang Pei Ying , Du Ya Jun , Wang Chang
Published: May 2011

In this paper we propose a hybrid method of literature recommendation in the academic community. First, we refer the objective recommendation based on HITS algorithm by constructing a directed graph according to the literature citation relation and then select the articles considering the authority and hub score of each article synthetically and add them to the recommendation list. This can narrow the recommendation scope and give a more authoritive recommendation. Second, the subjective recommendation is based on collaborative filtering by comparing the ratings of other similar users for the objects in recommendation list. The difference is we discover the similar user by clustering them. And the experiment shows the method can provide better recommendation results and is timesaving.
Peak Cycle Stress Analysis of the II Type Dent on Pipeline Based on FE Calculation
Authors: Ying Wu , Zhang Peng
Published: May 2011

Dent is one of the important factors affecting pipeline fatigue life, and it will greatly reduce the fatigue life of the pipeline in service. And the peak cycle stress on the dented pipeline is the key parameter to calculate pipeline fatigue life. For typical II type dent in the pipeline, the finite element models are established under different circumstances. A large number of the calculation results are sorted, inducted, drew. On this basis, the results are analysed by univariate and multivariate. Non-linear regression analysis was utilized to fit the results by matlab, some specific expressions of the relationship between the dented pipeline peak cycle stresses and the dent depth, diameter and thickness of pipeline, and the dent longitudinal length are obtained after much calculation and analog.
Assessment on Environmental Friendly Characteristics of Pinus Biomass for Building Materials
Authors: Zhang Xu , Zhang Ri Qing
Published: May 2011

In order to evaluate environmental friendly characteristics, the volatiles of Pinus massoniana biomass were adsorbed and determined by TD-GC-MS. And the main constituents of volatiles at 190°С were 1,4-methanoazulene, decahydro-4,8, 8-trimethyl-9-methylene-(30.62%), 1,4-methanoazulen-9-ol, decahydro-1,5,5,8a-tetramethyl-(10.46%), 1r-.alpha.-pinene(7.44%), 1,6,10-dodecatriene, 7,11-dimethyl-3-methylene-, (e)- (4.88%), tricyclo[5.4.0.0(2,8)]undec-9-ene, 2,6,6,9-tetramethyl-(4.31%), bicyclo[2.2.1]heptan-2-one, 1,7,7- trimethyl-, (1r)- (3.23%), borneol (3.08%), 1,3-benzodioxole, 5-(2-propenyl)- (2.85%), caryophyllene oxide(2.70%), 1-phenanthrene -carboxaldehyde, 7-ethenyl-1,2,3,4,4a,4b,5,6,7,9,10,10a-dodecahydro-1,4a,7- trimethyl- (2.30%), acetic acid(2.22%), etc. So the Pinus biomass was safe at 190°С carbonization.
Research on High Performance of Pantograph Slider Used by High Speed Train
Authors: Yang Lian Wei , Wang Rui Jie , Jia Miao
Published: May 2011

In view of the problems of current pantograph sliders of electric train，a new pantograph slider is developed for high speed train. The new pantograph slider is consisted of copper，carbon fiber, graphite and etc. The results showed the optimal technique of preparing slider : copper content 78％, carbon fiber content 2％, additive content 5％, pressure 200MPa and sintering temperature 880°C. Its resistance is very low. And its performance of friction，abrasion and impact toughness etc. is improved greatly compared with foreign immersed metal carbon slider Rh82Mb with friction coefficient reduced by 20 %，abrasion ratio decreased by 1.3 %，impact toughness increased by 1.7 times and conductance increased by 65 times.
The Study on Operation Charateristic of Double-in and Double-Out Ball Mill Based on Data Mining
Authors: Liu Bao Ling
Published: May 2011

At present, the fifteen percent of auxiliary power is consumed in pulverized coal in power plant, and most of which is lost in the form of heat. So the study how to make mill work efficiently arouses the interest of many researchers. A method based on data mining is presented in this study to improve the operarion charateristic of ball mill.
Tensile Behavior and Fractography of Ti-TiAl Multi-Layered Foil Prepared by Electron Beam Physical Vapor Deposition Technology
Authors: Hu Zhao Hui , Li Yi , Ma Li , Liu Hong Jun
Published: May 2011

Ti-TiAl multi-layered materials have been prepared by electron beam physical vapor deposition technique. The tensile behavior of samples at room temperature and high temperature was tested, and then the deformation mechanism at different temperature was analyzed according to the fracture surface. The results show that the tensile curves hot-pressed samples have a broad step during the plastic deformation process, and the breaking strain of the sample has been increased for a wide-range. The presence of Ti layers have led to the cracks stagger along the inter-laminar interface or the layer due to which micro laminate expresses a good characteristic of delayed fracture. With the increase of temperature, the bulk modulus and yield strength of multi-layered Ti-TiAl have been increased abnormally due to the anomalous yield strengthening behavior of TiAl intermetallic.
Industrial Organization Analysis on Solar PV Industry (Solar Photovoltaic)
Authors: Cai Yuan
Published: May 2011

This article discusses the correlation between market structure and value GetCapabilities of major procedures of the PV industry, from the results we can find: As the number of enterprises involved in four procedures of the industrial chain increases, the degree of monopoly of market structure in all procedures are becoming more and more weaker, increasing the level of competition, which resulting in decreasing order of the corresponding distribution of profits, demonstrated as a "inverted pyramid" structure. Market structure of value chain in every procedure determines its ability to obtain the profits. That the industrial organization of PV industry can be explained by the SCP paradigm of Harvard School.
Mathematical Model and Algorithm of Soy Sauce Quality Evaluation Based on Fuzzy Clustering
Authors: Li Yu Feng , Wang Chun Ling
Published: May 2011

A mathematical model is created, and the algorithm is designed according to the fuzzy clustering. The main indices of the soy sauce samples are detected, and the data are analyzed using fuzzy clustering. As a result, many classes including different soy sauce sample can be obtained, and the quality within the same class is similar. The mathematical model and algorithm provide a method to identification the soy sauce. And in the others, it provides a new method to evaluate the quality of the soy sauce.
Finite-Time Chaos Control of the Chaotic Financial System Based on Control Lyapunov Function
Authors: Wang Yu Ling , Ma Jun Hai , Xu Yu Hua
Published: May 2011

In this paper, we deal with the finite-time chaos control of the chaotic financial system. Based on the control Lyapunov function (CLF) theory, the control law are proposed to drive chaos to equilibria within finite time. Numerical simulations are given to show the effectiveness of the proposed controller.
A Communication Channel Unblocked Reliability Model under Random Conditions
Authors: Zhao Ni , Li Xun
Published: May 2011

The randomness of communication requirements and communication capabilities is the main reason that causes congestion as well as randomness of communication system service efficiency. Based on the analysis on effect of random factor on communication system requirements as well as random factors, such as interference, weather, accidents, on communication capabilities, the paper analyzed on randomness of communication requirements and communication capabilities and established functional function model of communication channel. Referring to reliability theory, the channel unblocked reliability index was defined. Through evaluation on congestion probability, the reliability of communication system running status was also analyzed. The research can provide reliability reference to design and planning of communication system.
Numerical Simulation of Die-Casting Magnesium Alloy Impeller with the Central Gating System
Authors: Ma Xiao Chun , Zhuang Yi Qiang , Tao Ying Qi
Published: May 2011

AZ91D magnesium alloy used as the automotive cooling system’s pump impeller material, using the finite element analysis software ProCAST to numerical simulation for the temperature field and the flow field of die-casting process, analyzed the defects causes of magnesium alloy die-casting, and then determined the gating system. Based on the results of numerical simulation analysis, the design of ingate of the gating system set on central department is reasonable. It's benefit for smooth filling of liquid metal and uniforming the temperature field distribution, so as to reduce casting porosity, cold shut and shrinkage defects.
Numerical Investigation on Thermal Environment inside the Passenger Compartment of a Highway Sleeper Coach
Authors: Xie Xu Liang , Shen Fu Lin
Published: May 2011

In order to verify thermal comfort of a 12-meter-long highway sleeper coach equipped with a four-ducted air-conditioning system, the thermal environment inside the passenger compartment was numerical investigated with RNG k-ε turbulence model. Also, discrete ordinates radiation model was applied to consider the effect of solar irradiation. The characteristic distribution of the airflow organization and temperature field were obtained and compared with experiment results. Results show that the air flow and temperature distribution inside the passenger compartment are not uniform and greatly influenced by solar radiation and air inlet parameters.
A Study on the Closed-Loop Error Feedback Method of the Rapid Prototyping and Manufacturing Integrated System
Authors: Yuan Hong Ling
Published: May 2011

In order to improve the precision of the Rapid Prototyping and Manufacturing Integrated System, the author considers the manufacturing error chain as a closed-loop. According to the feedback method of closed-loop error, the author applies the BP neural network into the error control of the Rapid Prototyping and Manufacturing Integrated System to improve the product precision. And the error control method is applied in production.
The Design of the Fly Wheel of the Shaper Machine Tool According to the Maximum and Minimum Angular Velocity
Authors: Liu Hu Ran
Published: May 2011

This paper presents a new method to design and to determine the inertial moment of the fly wheel, according to the allowed maximum and minimum angular velocity. The advantage of this method is: in the same time of the dynamic analysis of the the mechanics we can fulfill the design of the fly wheel. With this method, the inertial moment of fly wheel is determined precisely. In the traditional method, first we have to determine the inertial moment of fly wheel, then, make static-dynamic analysis of the mechanism and find out the react force of the connect pair. For example, after work, one first goes home and then has to go shopping. But if we choose not to go home directly, while on the way home in passing do some shopping then go home. Even though it is not the shortest way, but in total we can shave time and rod. It is the same occasion with our design method too. Even though the process of calculation is more complicated than the formal method, but we can determine the reaction on the connect pair at the same time. So that in total decreased the amount of design work.
Transient Responses of Second-Order System
Authors: Guo Gao Fei , Wu Shun Xiang , Cao Da
Published: May 2011

This paper analyses the transient response of second-order system through time domain analysis, root locus and frequency domain analysis, meanwhile, studies the influence exerted to the system by the second-order system damping ratio and the coefficient ratio as well as the research and damping ratio associated with the relevant parameters, like delay time, rise time, peak time, overshoot, time regulation, basing on the unit step response, and the stability of the system is studied by root locus. Finally, graphics are built through the application of Matlab in order to have an intuitive understanding of the impact on the performance of the system.
The Distinguishing Method of Internal and External Defects Based on Double Liftoff MFL Signals of Oil Well Pipes
Authors: Ding Wan Jing , Kang Yi Hua , Sun Yan Hua , Li Jiu Zheng
Published: May 2011

This paper focus on the problem of asymmetrical evaluation level caused by the difficult of discrimination of internal and external defects of MFL inspection signals of oil well pipes to analyze the difference of change trend between the peak-to-peak value of normal detection signals of internal and external defects and the liftoff distance z. The liftoff characteristic is verified through experiments that the liftoff effect of internal defects has a gently change rate but the external has a sharp change rate. A double liftoff inspection method was further proposed, that was, there were double layers magneto sensors arraying in line in the normal direction to accomplish grads measure of two special spaced points in the liftoff direction. Then made cross correlation contrast of detection signals. Result in a new evaluation using the damping decrement of the peak-to-peak of inspection signals in the direction of liftoff. Finally, the unitary damping decrement as an evaluation value used for direct judgment was presented and confirmed by experiments, indicating that the proposed approach was of feasibility.
Complex Angle Measuring Method of Passive-Radar-Seeker
Authors: Zhao Chun Na , Shi Chang Di , Zhao Yu , Liu Yi
Published: May 2011

To overcome the shortcomings of the traditional passive-radar-seeker(PRS) for anti-decoy, a complex angle measuring method is proposed in this letter. The complex angle measuring method consists of monopulse angle and spatial spectrum estimation, two angle-measuring units. PRS can get the angle high-resolution features through the complex angle measuring method. So it is possible that PRS confronts decoy. Finally, the simulation results verify the feasibility and anti-decoy capacity of the complex angle-measuring method.
Heterogeneity of Suppliers and Knowledge Transfer in the Supply Chain
Authors: Lin Yan , Chen Yan
Published: May 2011

This paper empirically studied knowledge transfer between manufacturers and suppliers in the auto manufacturing supply chain. We focused on different suppliers based on merchandise they supplied for auto makers, and analyzed their impact on knowledge transfer in two directions: from manufacturers to suppliers, and from suppliers to manufacturers. Results verified that the former direction of knowledge transfer was significantly impacted by supplier’s roles, but knowledge transfer from suppliers to manufacturers could not be perfectly explained by supplier’s roles. This paper theoretically links suppliers’ role with knowledge transfer between auto makers and suppliers, and the results can assist firms choosing right knowledge transfer strategies according to different suppliers’ roles.
Research on the Creation of the Platform Environments for Network Analog Based on FHMIPv6 of NS2
Authors: Zhang Kun , Wang Hai Feng , Ma Yu Chun , Li Zhuang
Published: May 2011

In the process of the simulation FHMIPv6, build a reasonable experimental platform for experimental basis, based on the condition of network NS2 to construct an analog environment for its experimental requirements of the network environment platform and give script data.
Precision Analysis and Discussion on Marker Identification Method
Authors: Wang Huai Wen , Ji Hong Wei , Miao Hui , Shao Wen Quan
Published: May 2011

A technique for non-contact optical measurement of in-plane displacements based on correlation analysis is presented. This approach can be used to identify the position of a marker before and after deformation of a specimen or plane test-object. Some mechanical parameters of materials and strains can be calculated using information from several markers’ displacements. The method is simpler than other optical techniques in experimental processing and can efficiently used to measure large deformations. The precision of marker identification method is analyzed. And some discussion on this method is also given.
Study on the Cutting Force in Ultrasonic Elliptical Vibration Cutting of Hardened Stainless Steel
Authors: Zhang Cheng Mao , Li Cheng , Zhang De Yuan
Published: May 2011

Hardened stainless steels are materials widely used in the field of aviation and spaceflight. Machining of this materials with conventional cutting (CC) method is a real challenge compared to other difficult-to-cut materials. Ultrasonic elliptical vibration cutting (UEVC) method is a novel and non-conventional cutting technique which has been successfully applied to machine such intractable materials for the last decade. However, few studies have been conducted on the cutting force in ultrasonic elliptical vibration cutting of hardened materials. This paper presents an experimental study on cutting force in UEVC of hardened stainless steels using cemented carbide tools. Experiments have been carried out to investigate the effect of cutting parameters in the UEVC method in terms of cutting force, while cutting hardened stainless steels. The tests have revealed that the average thrust force,principal force and feed force drop to 3%,10% and 90% of CC value for UEVC of hardened stainless steels. The ratio between the CC force and the UEVC force decrease with the increase of DOC and cutting speed.
Effect of Blade Numbers on Pressure Drop of Axial Cyclone Separators by CFD
Authors: Luan Yi Gang , Sun Hai Ou
Published: May 2011

In this article, computational fluid dynamics(CFD) method is used to predict the effect of blade numbers on the pressure drop of axial cyclone separators. A three-dimensional model is built to acquire the resistance of axial cyclone separators with different blade numbers. The flow field inside cyclone separators is calculated using 3D Reynolds-averaged Navier-Stokes equations. And turbulence model is used to simulate the Reynold stress. Also pressure drop of cyclone separators with different blade numbers is expressed as a function of different inlet velocities. At the same inlet velocity with increasing the blade numbers, pressure drops of cyclones reduce greatly. And changing the blade number of cyclone separator is an effective method to improve its resistance performance.
Study on the Modified Effect of Wood Fiber by Silane Coupling Agent
Authors: Li Xin Gong , Zheng Xia , Wu Yi Qiang
Published: May 2011

In order to improve the interface compatibility of wood fiber and the polylactic acid (PLA), the silane coupling agent to modify the wood fiber was chosen. The Modified Effect of silane coupling agent on the wood fiber is judged inrectly by feat of the modification of viscosity characteristic of the mixed system of wood fiber and the liquid paraffin. The dosage of the silane coupling agent influenced the modification effect the most is shown in the research, the modification temperature, stirring speed and the modification time are followed.
The Preparation of CaMgSi2O6: Eu3+,Li+ Red Phosphor
Authors: Wang Ren Qing
Published: May 2011

SiO2, CaO and MgO was chosen as main raw material and Solid State method was used to prepare the samples. The precursor was directly sintered at 1000°Cfor 3h to obtain new green CaMgSi2O6:Eu3+,Li+Phosphors.The effects of the content of the doping ions Eu3+ on the luminescent properties have been studied. The structure, morphology and luminescent properties of the phosphors were characterized by X-ray diffraction (XRD), scanning electron microscope (SEM),UV and PL-PLE spectra respectively.The results showed that the CaMgSi2O6:Eu3+,Li+ was base-centered monoclinic crystals, the phosphor particle distributed uniformly.The phosphor has a strong absorptive capacity excited by 248 nm ultraviolet ray, and could emit the strong red light with the wavelength of 590nm(5D0→7F1)and 615nm(5D0→7F2). The CaMgSi2O6:Eu3+,Li+ is a new type of red fluorescent material.
Preparation and Structure of Chitosan Swellable in Alkali Solution by Ultrasonic Treatment
Authors: Fan Min , Hu Qiao Ling , Xie Jing
Published: May 2011

By treating chitin with ultrasonic in hot concentrated NaOH solution for about 30-120min, chitosan swellable highly in alkali was prepared. The swelling behavior and the structure of the prepared chitosan were invested. It was shown that the prepared chitosan can swell highly in NaOH solution by freeze-thawing treatment, with the particles turns into hydrogel. The swelling behavior showed that with the increase of NaOH concentration, the swelling degree of chitosan increases, until a concentration of 8.0 wt%, and ultrasonic treatment time has less significant influence on the swelling behavior. SEM showed that ultrasonic treatment makes the structure of chitin enough looser for the permeation of NaOH and H2O, resulting in the swelling of chitosan in alkali solution.
Edge Detection of Inner Crack Defects Based on Improved Sobel Operator and Clustering Algorithm
Authors: Wang Ke Fei
Published: May 2011

The classical Sobel edge detection operator has the shortcomings of low edge positioning accuracy and coarse edge, image edge detection based on improved Sobel operator and clustering algorithm was proposed. Four Sobel-like edge operators are used to improve the edge positioning accuracy and clustering algorithm are used to edge thinning. The experimental result demonstrates that the effect of the edge detection is greatly improved comparing with the traditional edge detection methods.
Texture Baking Techniques on Construction of Virtual Reality Interactive Scenes
Authors: He Qiu Hai , Zhai Yan , Li Xue Wen
Published: May 2011

In Virtual Reality Interactive Systems, texture is one of the most important factors which affects the scene fidelity and the entire system resources. In this article, we talk about the texture making methods in constructing virtual reality interactive scene. We discuss the bake mapping technique, and make the comparison and analysis among different mapping methods to find the method that can get the best effect with limited resources. According to our study method, users can choose the most appropriate methods based on their needs to construct the virtual reality scenes effectively, and make more realistic effects with limited hardware and software resources.
Topology Optimization Design of Implantable Energy Harvesting Device
Authors: Zheng Bin , Luo Liang Ping
Published: May 2011

When designing implantable biomedical MEMS devices, we must provide electric power source with long life and small size to drive the sensors and actuators work. Obviously, traditional battery is not a good choice because of its large size, limited lifetime and finite power storage. Living creatures all have non-electric energy sources, like mechanical energy from heart beat and pulse. Piezoelectric structure can convert mechanical energy to electric energy. In the same design condition, the more electric energy is generated, the better the piezoelectric structure design. This paper discusses the topology optimization method for the most efficient implantable piezoelectric energy harvesting device. Finally, a design example based on the proposed method is given and the result is discussed.
Additives on Hydrogen Donor Catalytic Upgrading for Viscosity Reduction of Heavy Oil under the Conditions of Steam Injection
Authors: Zhao Fa Jun , Liu Yong Jian , Zhang Bo , Ha Si , Li Shi Ping
Published: May 2011

Under the simulated thermal recovery condition, fundamental experiments were carried out in the high temperature high pressure reactor to study the aquathermolysis reaction of heavy oil using formic acid as hydrogen donor and oil-soluble organic home-made nickel salt as catalytic. Urea was selected optimally from the alternative chemical addictivess of ammonium carbonate, urea and ammonium hydrocarbonate and its dosage was 20wt%. The affect of the adding addictives in water for viscosity, group composition and element content of heavy oil during the hydrogen donor catalytic pyrolysis reaction, was researched. It was revealed that there mechanism in the heavy oil viscosity reduction reaction process. The addition of addictives had not only some degree of viscosity reduction function, but also synergistic interaction to the catalyzed reaction with hydrogen donor. Compared to the oil sample from reaction without addictives, there was no obvious change on group compositions, the contents of atom C, H, S, N and O nearly kept unchanged. the introduction of addictives basically did not change structure of heavy oil.
Uncertain Newsboy Model
Authors: Ding Si Bo
Published: May 2011

In this paper, we consider a new model of newsboy problem with uncertain variables under budget constraint. Since the demands of products are often uncertain in real life, the profit of the newsboy is uncertain. We develop expected profit model and investigate its deterministic equivalent class. In the model, the objective function is to maximize the expected profit of newsboy and the chance of achieving a target budget satisfies chance constraint with at least some given confidence level. Furthermore, a hybrid intelligent algorithm which integrates genetic algorithm and 99-method is designed for the model. Finally, an illustrating example is given to show the application of the proposed model and algorithm.
Design of Robot Master-Slave Control System Based on LabVIEW
Authors: Zhang Yanfei , Xiao Xiao , Gong Jinliang , Wei Xiu Ting
Published: May 2011

At present, most of the robots’ intelligent level is not as high as needed and they can’t accomplish some special tasks successfully under complicated circumstances. A kind of robot master-slave control system based on LabVIEW is designed, which allows operators control robots working in dangerous environment such as high radiation, ultrahigh temperature through outside input device. The device should connect with the master computer. This kind of operation mode can not only make full use of human intelligence, but also exploit the robots’ ability of being able to work in the abominable environments, making human and the robot fully complement each other's advantages. At the same time, the robot master-slave control system based on LabVIEW is easy to develop and maintain for its good portability and scalability.
Special Scattering Characteristics of Materials Oriented Method of Polarization Analysis
Authors: Xu Shi Xue , Xu Ling Fei , Chen Yan Ru
Published: May 2011

Polarization analysis method is widely used in the area of target detecting. Compare with the traditional method which based on intensity analysis and spectrum distribution analysis, the polarization analysis is dominant by analyzing the polarization ingredient of optical information. Under normal conditions, polarization analysis method can discern the given targets and determine their characteristic more precisely in a further distance. The validity of polarization analysis depends on the polarization characteristics of the targets. Our experiment indicates that some typical materials have similar scattering characteristics which could fail the traditional analysis method. Further research indicates that there are a few remarkable differences in the scattering characteristics of these kinds of materials based on which a new method of polarization analysis is given in this paper to ensure the validity of polarization analysis under more application conditions.
CFD Simulation for Displacement Deep-Vee Vessels on Resistance Influence Factor
Authors: Xie Yi , Xia Xiang Dong
Published: May 2011

Resistance influence factors of displacement type Deep-vee forms are analyzed with eight hull forms provided. The free surface viscous flow of these forms is calculated by air-water two phases RANS equations with RNG turbulence model and volume of fraction method. Total resistance, pressure distribution and wave profile of bow are presented. Some results can be taken as follows: while maintaining the same tonnage, L/B ratio and draft, the resistance performance of Deep-Vee vessels is excellent at high speed if a large transverse dead rise angle was located from 50%front midship to 25% backward midship; The resistance performance at a lesser L/B and draft is worse if the displacement and dead rise angle is the same; Furthermore, it can be improved by a cigar-shaped bulbous bow. The change of pressure distribution for cigar-shaped bulbous bow is more slightly than that of tobacco pipe-shaped bulbous bow.
The Research of Steer by Wire System Based on Fuzzy Logic Control
Authors: Geng Shu Fang , Peng Qing Feng , Wang Li Fang
Published: May 2011

This paper describes SBW system structure and principle, for different vehicle speed inputs and steering wheel angle step inputs, the simulation model run in Simulink, and obtain yaw rate response characteristics, so the steering system control requirements is proposed, establishes fuzzy logic control system. This control strategy can improve vehicle’s stability and fast respond characteristics. Simulations are carried out to gain a series of transmission ratio curves, show the validity of the proposed fuzzy logic control method.
Modeling the Loading-Rate Dependency of the Hysteretic Dynamics of Magnetorheological Dampers
Authors: Zhang Cheng , Wang Lin Xiang
Published: May 2011

The loading rate dependency of the hysteretic dynamics of Magnetorheological (MR) dampers is investigated in the current paper. The model is constructed on the basis of a phenomenological phase-transition theory. The hysteretic dynamics is treated as the responses of a nonlinear system upon external loadings. With appropriately chosen coefficients, the proposed model is able to capture the loading-rate dependency feature of the hysteretic dynamics. Comparisons between the numerical and experimental results are presented, and perfect agreements are obtained.
Copula-Based Security Assessment of Power Insulators Influenced by the Storm
Authors: Wang Zhao Kun , Yi Jun , Lai Ming Yong , Liu Bao Ping
Published: May 2011

In this paper the model of Copula-based security assessment of power insulators under the impact of the storm is proposed. The model firstly analysis the daily average winds speed, the historical daily rainfall data to get the probability of wind speed and daily rainfall distribution. Then presents the model of security assessment of power insulators under the impact of wind and rainfall by considering not only the probability of relevance between the daily average wind speed and daily rainfall by using Copula join function, but also the combination of meteorological factors on the impact of power insulators security. This work was supported by the Key Scientific and Technological Project of Hunan Province of China (2008FJ1006).
Compressed Iterative Particle Filter for Target Tracking
Authors: Zhu Hong Bo , Zhao Hai , Liu Dan , Song Chun He
Published: May 2011

Particle filtering has been widely used in the non-linear n-Gaussian target tracking problems. The main problem of particle filtering is the lacking and exhausting of particles, and choosing effective proposed distribution is the key point to overcome it. In this paper, a new mixed particle filtering algorithm was proposed. Firstly, the unscented kalman filtering is used to generate the proposed distribution, and in the resample step, a new certain resample method is used to choose the particles with ordered larger weights. GA algorithm is introduced into the certain resample method to keep the variety of the particles. Simuational results have shown that the proposed algorithm has better performances than other three typical filtering algorithms.
Quasicrystal Al63Cu25Fe12 Melting Nearby Resistivity and Viscosity Properties Research
Authors: Qin Hai Ou , Geng Hao Ran , Li Zhen Yuan
Published: May 2011

A four-probe dc method for measuring the electrical resistivity of liquid quasicrystal Al63Cu25Fe12 was investigated in this article and found out that the resistivity of the melt temperature negative factors. Resistivity in alloy melting temperature near the lower interval occurred in phase I and λ, but is not happen to shift in β phase. That would not cause phase change of electronic transport, may be held without fracture, and held the bond length is changed. The viscosity of liquid quasicrystal Al63Cu25Fe12 was tested by using torsional oscillation viscosity measurement. Anomalous change at the temperature of (1401-1473)K occurred from the viscosity-temperature cures, some liquid-liquid change has taken place at this temperature.
Tolerance Sensitivity Robust Design and Evaluation Method
Authors: Mao Jian , Cao Yan Long
Published: May 2011

Robust design is less sensitive to the manufacturing variation and its demand for controlling the manufacturing variation can be reduced. The existing robust design techniques are limited to solve individual synthesis problems, and these methods seldom consider the problem of tolerance sensitivity. This paper presents a method for tolerance sensitivity design and evaluation. First, tolerance sensitivity robustness is analyzed and the tolerance sensitivity robust design models are developed. Then, the matrix analysis method is introduced to evaluate complex assembly relationship among design functions and parameters. The results show that compared with origional mothod, the proposed method is siutble and reliable.
Vibration Transient Response Using Statistical Energy Analysis
Authors: Li He , Liu Quan Feng , Wen Bang Chun
Published: May 2011

Transient Statistic Energy Analysis (T. S. E. A.) for transient response of a vibration system is investigated in this paper. Mathematical expressions of the rise time and the peak energy were derived. Numerical modeling of the system was also made. It showed that the peak energy decrease as the internal loss factor and the coupling stiffness decrease, the rise time decease as the internal loss factor and the coupling loss factor increase. It was found that the results of TSEA and the traditional methods are identical.