bluuebunny/crossref_metadata_2025 huggingface dataset:
Investigation on Size Effect of Cantilever Carbon Nanotube
Authors: Liang Ying Jing , Han Qiang
Published: November 2012

Nonlocal elastic shell model based on the semi-moment theory is developed and applied to investigate the small scale effect on the bending problem of the cantilever carbon nanotube (CNT) with a vertical concentrated load applied at its tip. The small-scale effect is taken into account and is incorporated in the formulation. Analytical expressions of the stress are derived for the nonlocal elastic bending problem. It is obvious to observe significant small-scale effects on the stress resultants. The smaller the radius is, the more obvious the scale effect appears. The numerical results show that the scale effect cannot be ignored for CNTs of small radius.
Bacterial Cellulose: The Nano-Scalar Cellulose Morphology for the Material of Transparent Regenerated Membrane
Authors: Chen Chu Chu , Li Da Gang , Deng Qiao Yun , Wang Yu Mei , Lin Dong Liang
Published: November 2012

This paper demonstrates the preparation of transparent regenerated membrane from bacterial cellulose (BC) sheets using the lithium chloride（LiCl）/dimethylacetamide (DMAc) as dissolved system. The structure of the membrane was investigated by the scanning electron microscopy (SEM). It showed very smooth, dense and homogeneous surface while the raw BC sheet was poriness. FT-IR spectroposcopic analysis of both bacterial cellulose and the transparent membrane revealed that chemical composition was not changed during the fabrication process but only the peak strength changed. Mechanical property tests presented that after regeneration process, the tensile strength of the regenerated membrane was well improved compared with the raw BC sheets. Its light transmission was also attaining 91.2% due to the nano-scale structure. From the above，these properties make the transparent regenerated BC membrane potentially applied in optical electronic and packaging fields as the commercially available material.
A Semi-Analytical 3-D Solution for Bending Under Tension
Authors: Alexandrov Sergei , Lyamina Elena , Lang Li Hui
Published: November 2012

The paper concerns with three-dimensional analysis of the process of bending under tension for incompressible, rigid viscoplastic material at large strains. The constitutive equations consist of the Mises-type yield criterion and its associated flow rule. No restriction is imposed on the dependence of the equivalent stress on the equivalent strain rate. The problem is reduced to evaluating ordinary integrals and solving transcendental equations.
Investigation of Exhaust Gas Temperature Correction Methods for the Change of Air Inlet Temperature
Authors: Zhao Zhen Ning , Wang Jing Jing , Zhao Zhen Zhou , Zhang Qing Feng
Published: November 2012

The exhaust gas temperature correction for the change of air inlet temperature is the most significant correction for boiler performance test. However, in ASME and China GB standard, the regulations of the correction formulas are different, which brings about some misunderstanding in actual use. In this paper, the correction formulas are derived and analyzed. What’s more, the application conditions are summed up and described as follows. Firstly, the top and side of the air heater must be in good sealing ability, for which the air leakage can be ignored. Secondly, the air inlet temperature must be taken from the entrance of the air heater, but not from that of the forced draft fan. Finally, the air leakage of the air heater must stay the same before and after the correction. On this basis, a correction method is conducted, which takes the cold air temperature at the entrance of the forced draft fan as the air inlet temperature and can be applied under different air leakage ratios conditions. With the same form as the traditional one, the method mentioned above is easy to understand and has a positive meaning in handling such problems.
Study on Measuring Perpendicularity Based-On Non-Diffracting Beam as the References
Authors: Zhang Xin Bao , Zhang Kun , Lu Hong
Published: November 2012

A new method for measuring perpendicularity is developed in this paper, in which the non-diffracting beam that illuminates a pentagonal prism to produce the vertical reference is used as the straight-line reference and CCD is used as the sensor to gauge the position error to the references. Three evaluation algorithms of the perpendicularity error are also given in the paper. And furthermore, perpendicularity of a Coordinate Measuring Machine was measured by this method, which is easy to be operated. The results and analysis indicate that its working distance can be more than 15m while the precision can be less than±5μm/m.
Focusing Properties of the Visible Light Wave through Plasmonic Lenses with Subwavelength Chirped Slits
Authors: Feng Di , Zhang Chun Xi , Yang Yuan Hong
Published: November 2012

Focusing properties of a new kind of plasmonic lenses are investigated in the visible wavelength range through a subwavelength metallic chirped slit arrays which have the same depth but chirped widths. The chirped widths of slits are like a piece-wise-linear distribution which will be approximated by linearly increasing the width of a subwavelength feature and can build up a required phase front for focusing. We analyzed the focusing characteristics of different metallic lenses (silver and gold, respectively) with chirped widths that are obtained by generalizing the relevant phase delay for TE- and TM-polarized incident waves, for different f-numbers of lenses and for different material thickness, respectively. Meanwhile, the comparison of the metallic and dielectric lenses is also presented. The results of calculations show that, the metallic lenses are more sensitive to the polarization of incidence wave than that of dielectric lenses, and can get narrower full-width half-maximum (FWHM) beam width than that of dielectric lenses for TM-polarized incident waves, respectively. No matter which f-number we choose, the FWHM of dielectric lenses are higher than the plasmonic lenses, and the plasmonic lenses can get a higher focal resolution than dielectric lenses do. This kind of plasmonic lenses should have a good potential for applications in photonic and plasmonic integrated devices, sensing, and nano-optical manipulations, etc.
Image Blind Separation Based on Adaptive Multi-Resolution Independent Component Analysis
Authors: Wang Jing Hui , Tang Shu Gang
Published: November 2012

In this paper, a novel image blind separation using adaptive multi-resolution independent component analysis is presented.This method separates mixed images based on quadratic function. The quadratic function can be interpreted as the time-frequency function or time-scale function, or other. According to the signal characteristics, we can choose the frequency resolution or scale resolution. The argorithm extends the separate technology from one dimensional domain to two dimensional domain,and it’s implement by adaptive procedure. The experimental result showed the method can be effective separation of mixed images. And it shows that the method is feasible.
A Knowledge Representation and Learning Model Based on FNPN in PAAIS
Authors: Hui Yu
Published: November 2012

Through used Fuzzy Petri Net to set up the knowledge representation and reasoning rules, a Fuzzy Neural Petri Network (FNPN) method whose parameters can be trained by Neural Network was proposed in this paper. The experimental result indicated that, the Neural Network and the Petri net combination can make the fuzzy production rule systems more effective, and also can be applied to most practical Petri net models and fuzzy systems.
A Generalized Four Point Interpolatory Subdivision Scheme for Curve Design
Authors: Zhang Xin Fen
Published: November 2012

ßIn this paper we propose a new kind of nonlinear and geometry driven subdivision scheme for curve interpolation. We introduce serval parameters in the new scheme.When the parameter ß is taken as 0, the new scheme presented in this paper regresses to the initial four point subdivision scheme, and when ß→∞ , the new scheme is convexity preserving. With proper choices of the subdßivision parameters,it can overcome the shortcoming of the initial four point subdivision scheme proposed.
Template-Based Handwritten Numeric Character Recognition
Authors: Li Ling Hua , Mi Shou Fang , Zhang Heng Bo
Published: November 2012

This paper describes a stroke-based handwriting analysis method in classifying handwritten Numeric characters by using a template-based approach. Writing strokes are variable from time to time, even when the writing character is same and comes from the same user. Writing strokes include the properties such as the number of the strokes, the shapes and sizes of them and the writing order and the writing speed. We describe here a template-based system using the properties of writing strokes for the recognition of online handwritten numeric characters. Experimental results show that within the 1500 numeric characters taken from 30 writers, the system got 97.84% recognition accuracy which is better than other systems shown by other literatures.
Design of Dual-Wavelength High Precision Achro-Matic Phase Retarder
Authors: Ma Jian Ling
Published: November 2012

In order to meet the demand of precise measurement and applications, based on the total-reflection phase transformation theory of the phase retardation, the principle of phase retardation with oblique incident angle is expounded. Spectral characterization of the phase retardation varing with refractive index is analyzed to high precision achromatic phase retarder to oblique incidence aided design. The result indicates that there is a maximum to dispersion curve of achromatic phase retarder with oblique incident in the center of the design refractive index department. The phase-delay drops on both sides to the center of the refractive index and can pass through a definite retardance value twice at two specified wavelength values. Accordingly, based on the detailed design of Fresnel rhomb, The new achromatic retarder with the specific incident angle and high precision is designed by choosing suitable meterial .It is shown at the achromatic property curve within the range of 500 nm to 1150 nm theoretically that the maximum deviation of the retardance from 90° is 0.006°, whereas at λR1R=532 nm and λR2R=1064 nm the retardance is approximately 90°±0.001°. and the corresponding calculation to the size of the devices indicates that the size of the devices for the same aperture will decrease for higher refractive index values.So optical materials with higher refractive indices are more convenient for this type of oblique incidence retarder .
The Preparation of PAN Composite TiO2 Nano-ACF and the Conditions Study
Authors: Wu Yan Bo , Yan Ying Chun , Lou Ting , Song Tie Ben
Published: November 2012

With its simple, easy operation, electrostatic spinning has become the most important and effective way on the preparation of nano-fibers. Through experiments, we identified the optimal conditions for the preparation of PAN nano-fibers composite TiO2 are: the spinning solution concentration is 12%, the angle is 5~8°, the spinning distance is 8cm, and the voltage is 12kV. The pre-oxidation largely determine the structure and properties of carbon fiber in the preparation of carbon nano-fibers. The temperature plays a decisive role on pre-oxidation. Through SEM、TG-DTA and FTIR, we explore the best conditions for the pre-oxidation temperature is 280°C and the pre-oxidation time is 2h. After carbonization and activation, the characteristic peak of TiO2 appeared at 2θ=25.2°, 37.7°in the patterns of XRD.
High-Temperature Brazing Molybdenum
Authors: Lin Chia Chen , Lee Cheng Han , Shiue Ren Kae , Shy Hsiou Jeng
Published: November 2012

High-temperature brazing molybdenum using palladium and titanium foils have been investigated in the experiment. Successful brazed joints are achieved from using the palladium filler foil. Brazed joints are fully dense and free of any intermetallic phase. Three point bending strengths of 246 and 233 MPa are obtained from joints using 100 m thick palladium filler foil brazed at 1580 and 1610 oC for 600 s, respectively. The application of palladium filler foil shows potential in brazing molybdenum for high-temperature application.
A Direct Method to Evaluate the Tensile Strength of Polyolefin Fiber Cement-Based Composites
Authors: Han Ta Yuan , Lin Wei Ting , Cheng An , Huang Chin Cheng
Published: November 2012

This study is aimed to evaluate the tensile strength of cement-based composites which comprise polyolefin fibers and silica fume in the mixes. Material variables include water-cementitious ratio, dosage of silica fume, steel fiber length and dosage. Test results indicate that the compressive strength and direct tensile strength of specimens for fiber length of 25 mm are higher than that of 50 mm. The strength properties increase with increasing fiber content. Incorporation of fiber and silica fume in composites achieves significantly higher increase in compressive strength and direct tensile strength than only use of fiber or silica fume. In addition, the compressive strength, splitting tensile strength, direct tensile strength and impact resistance are fairly correlated. It contributes that the fiber content influences crack arresting ability and the silica fume influences interfacial bonding effectively.
Optimal Carbon Nanotubes Concentration Incorporated in Mortar and Concrete
Authors: Hamzaoui R. , Bennabi A. , Guessasma S. , Khelifa R. , Leklou N.
Published: November 2012

The mechanical properties and microstructure of modified mortar and concrete using Carbon NanoTubes (CNT) are experimentally studied at 7, 14, 28 and 90 curing days. Part of the formulation, CNT are dispersed in a liquid solution. Different concentrations ranging from 0.01% to 0.06% and 0.003% up to 0.01% are used for mortar and concrete, respectively. Mechanical testing of the modified materials reveals that maximum compressive strength is obtained for CNT concentrations close to 0.01%wt and 0.003%wt for mortar and concrete, respectively. The microstructural characterisation of the modified materials suggests that CNT act as bridges between pores and cracks leading to a reduction in porosity and in turn an increase of compressive strength.
Cure Time Effect on Compressibility Characteristics of Expansive Soils Treated with Eco-Cement
Authors: Aniculaesi Mircea , Lungu Irina , Stanciu Anghel
Published: November 2012

The objective of this paper is to investigate the influence of curing time on expansive soil as a construction material when treated with eco-cement stabilizer, as partly substituting the Portland cement. Standard consolidation samples were prepared from treated soils with 10 % cement (5% eco-cement and 5% Portland cement), reported to the dry unit weight of soil, and cured for 1, 7 and 14 days. After this period the soil samples were then socked in water and standard consolidation tests were performed on them. The compressibility characteristics, for the improved soil with 10% cement, Eoed, mv and Cv have shown a significant improvement during the first 7 days. After 7 days curing time the variation of compressibility characteristics is less pronounced.
Sustainable Building Finishes: Use of Renewable Standardized Wood-Based Material in Nigeria
Authors: Adedeji Y. M. D. , Taiwo A. A.
Published: November 2012

This paper reports a research on sustainable building finishes in Nigeria. Because the building industry consumes a substantial percentage of the materials entering the global economy, and is responsible for the emission of almost half of the global greenhouse gases, it is important to consider the aspect of material efficiency as a component of achieving sustainability. This paper critically appraises this development as the use of the renewable wood-based materials has impacted remarkable success towards achieving sustainable building finishes in the country. It reports findings on the authors’ research through case studies, observations and structured questionnaire on the influence of use of renewable wood-based materials on the building industry in Nigeria. Findings of empirical survey conducted among professionals such like Architects, Engineers, Quantity Surveyors, Builders and Contractors practising in some selected cities in Nigeria on the use of the material were analysed along side with personal interviews of these professionals to obtain their views on the subject, revealing that the industrial production of standardised wood-based material to a finished stage makes building operation faster, reduces labour and wastages and enhances modular designs and construction thus aligning production with the current global trend. Timber material used for finishes was also observed to have good aesthetic value in building construction. The paper recommends that the material should be made available in the market in finished standard sizes for users to assemble on sites.
A Study on Hardened State Properties of SCC Using Fly Ash and Blended Fine Aggregate
Authors: Nagaratnam Brabha H. , Rahman M.E. , Mannan M.A.
Published: November 2012

The aim of this research is to investigate hardened state properties of Self Compacting Concrete (SCC) containing low calcium based fly ash. The mixtures were prepared using various proportions of Class F fly ash ranging from 0% to 30% cement replacement. Water to powder ratio is 0.38 – 0.39 and powder content was kept constant at 540 kg/m3. Properties investigated were strength properties (compressive strength and splitting tensile strength), and durability properties (complete immersion water absorption, apparent volume of permeable voids (AVPV), sorptivity, and RCIPT tests. These tests were done at various days. Results showed that fly ash replacement of up to 30% gave acceptable strength and durability properties for medium strength SCC.
An Investigation into the Optimum Carbonization Conditions for the Production of Porous Carbon from a Solid Waste
Authors: Yazdi Sara Kazemi , Soltani Salman Masoudi , Hosseini Soraya
Published: November 2012

Cellulosic materials and cellulose derivatives have been long used in the synthesis of numerous materials. These include various products such as papers, cigarette filters and sanitary pads. Cigarette filters, containing 95% cellulose acetate fibers, are responsible for one of the largest solid wastes generation today. In this work, a simple one-step carbonization of cigarette filters under various operational parameters is used in order to produce porous carbon. The effects of various pyrolysis parameters including carbonization temperature, heating rate and hold time on the final porous carbon product have been investigated. Adsorption-desorption isotherms, scanning electron microscopy (SEM), Energy-dispersive X-ray spectroscopy (EDX) as well as thermal gravimetric analysis (TGA) have been employed to characterize the pyrolyzed product. The optimum conditions for the production of porous carbon from cigarette filters in relation to its maximum specific surface area (637 m2/g BET surface area) is understood to be at a heating rate of 5 °C/min at 900 °C for 1 hour.
Pavement Subgrade Improvement by Lime
Authors: Khan Bazid , Siraj Abdus , Khattak Riaz A.
Published: November 2012

The subgrade soil of western by Pass Road Mardan, Pakistan consists of silty clay belonging to A-6(14) group of the AASHTO soil classification system. The average natural moisture content of the soil is more than 18% which makes it susceptible to water logging and problematic for pavement construction. The aim of this research is to improve the supporting power of the existing subgrade material to carry the proposed traffic safely. For this purpose, lime was incorporated into the soil. Soil samples were prepared containing 0, 4, 6, 8, 10 and 12% lime by weight of the soil. Laboratory tests were conducted for determining particle size distribution, Atterberg limits, optimum moisture contents and maximum dry density and California Bearing Ratio (CBR). From this study it was found that the CBR initially increased with increase in lime content, reaching to a maximum value (35.50 %) at 6% lime content and then decreased with further increase in lime content. The optimum lime content for CBR was found as 6.50% (w/w), which enhanced CBR value by 337% compared to control. A consistent decrease from 1.92 at 0 to 1.763 (g/cm3) at 12% lime was observed suggesting compaction in the material. Results suggested that liming subgrade material is a viable option for improving pavement.
Measuring Coaxiality with Optoelectronic and Non-Contact Based on Helical Scanning
Authors: Liu Qi Fang
Published: November 2012

In view of the characteristic of the inefficiency on measuring coaxiality manually in industry, we put forward to studying on a laser triangulation san method[1] for measuring distance to measure coaxiality. It takes relative motion between the measurement thing and displacement laser sensor to implement helical scan motion and gain the data of spiral scanning projection based on step servo system by gyration and the axial feed. This method can improve manufacture efficiency and achieve the demand of online automatic testing. Finally, the way of implementation of this system would be discussed in this paper, meanwhile, it would provide simulation results of the method and actually feasibility analysis .
Research of Super-Size Intelligence Flow Measurement System
Authors: Zhao Yu Bin , Li Ya Li , Wang Jia Cheng , Zhang Zhen
Published: November 2012

In this paper, we study a kind of intelligent and high-accuracy flow measurement system, which is a type of venturi tube flowmeter that surpassed the international standard ISO5167. This paper analyzes the characteristics of the super-size flow measurement in the water transportation and industrial projects, and the choice for suitable flow meters. We study the practical compensation technology for discharging coefficient “C” of the international-standard-exceeding venturi tube, and puts forward water calibration method for venturi tube, and design the intelligent and high-accuracy flow metering system based on computer technology. Furthermore, this paper analyzes the calibration data of water flow, and propose the segment and compensation method for discharging coefficient “C” practically. We solved the limitations of the international-standard-exceeding venturi tubes, and effectively improved the accuracy and range of the flow measurement system.
Research of Double-Differenced Carrier Phase Cycle Slip Detection Based on Wavelet Analysis
Authors: Li Yi De , Li Zhan Feng , Li Xi Nan
Published: November 2012

It is easier to develop the cycle slip phenomena during the carrier phase observation in GPS. In order to improve the reliability and accuracy of the system measurement, we need to diagnose and find out the position of the cycle slip, and then fix it before the data pretreatment stage which is ahead of the adjustment. Using the double-differenced carrier phase observables can eliminate the correlative error term and improve the accuracy of the measurement. Therefore, the essay studies the method of the double-differenced carrier phase cycle slip detection based on the wavelet analysis, and finally test the measured data. The experimental results showed that the detection of cycle slip is very sensitive when we select the suitable wavelet base.
Distribution Grid Condition Monitoring Based on BP Neural Network
Authors: Zhang Liang Liang , Wang Ling Mei , Zhao Xing Yong
Published: November 2012

Intelligentialize of distribution networking technology will become an important trend as the development of the electric power industry in future. In order to build the integration platform of intelligent power grid, the SCADA technology of distribution grid, the advancing technical method of condition monitoring are introduced into the distribution grid monitoring system. Meanwhile, the autocorrelation function is introduced into load forecasting and established the power load forecasting model which is examined based on the MATLAB BP neural network tools of load simulation software. Monitoring distribution network structure state and knowing state clearly of forecasting distribution network node load will provide effective information to establish platform of smart grid information integration. Through the simulation examples, proving the effectiveness and practicability of the scheme.
Application of Grey System Method in Stress Monitoring and Control of Continuous Girder Bridge Construction
Authors: Duan Bao Fu , Zhai Cheng Bo , Weng Xian He
Published: November 2012

During the monitoring and control of continuous girder bridge construction, the traditional method can't effectively predict the trend of stress in the bridge. What′s more, the application is very complex. This paper builds two kinds of grey prediction model based on the stress sequence of control section in the same continuous beam bridge construction, then compares the application of this two models. Information renewal GM ( 1, 1) model and SCGM(1, 1) dynamic model are based on stress test results from control sections in the Nanhe Bridge construction in Jiangsu province for stress prediction. The results showed that the prediction precision and adaptability of both models can achieve the level of engineering construction requires, and the feasibility and adaptability of these two models in stress prediction of the continuous girder bridge construction are validated.
Novel Nonlinear Process Monitoring Based on KPCA-ICA
Authors: Xiao Ying Wang , Zhang Chen Zhong
Published: November 2012

A novel nonlinear process monitoring method based on kernel principal component analysis (KPCA) - independent component analysis (ICA) is proposed. The new method is a two-phase algorithm: whitened KPCA plus ICA. KPCA spheres data and makes the data structure become as linearly separable as possible by virtue of an implicit nonlinear mapping determined by kernel. ICA seeks the projection directions in the KPCA whitened space, making the distribution of the projected data as non-gaussian as possible. The application to the Tennessee Eastman (TE) simulated process indicates that the proposed process monitoring method can effectively capture the nonlinear relationship in process variables. Its performance significantly outperforms monitoring method based on ICA.
A Model- Based Detection Method for Stator Core Fault in Induction Motors
Authors: Wang Xu Hong , Liu Hui Zhi
Published: November 2012

An on-line method to detect induction motor stator core fault by stator negative sequence current is proposed in this paper. New equivalent circuits including the positive, negative and zero sequence equivalent circuits are is obtained by the existing abc coordinate model. In the circuits, the stator core losses is increased and asymmetrically distributed among the three phases when a stator fault happens. Experiment results prove the effectiveness of this method.
Feature Analysis and Extraction of Complex Motion Target Based on Coherent Laser Remote Sensing Detection
Authors: Li Zheng , Hu Yi Hua , Yan Fei
Published: November 2012

Vibration features of moving targets can reflect their detailed characteristics, which have important military and civil values. Coherent lidar is the preponderant method of target detection, because of its advantages such as high measurement accuracy and ability of long-distant non-destructive measurement, which is appropriate for detecting the vibration information of the target through remote sensing. Traditional analysis of moving target’s vibration always contained only one motion mode, which could not reflect the real complex motion of the target. This paper proposed a novel model of complex moving target’s vibration for coherent laser remote sensing detection. Considering the vibration signal is non-linear and non-stationary, Hilbert-Huang transform (HHT) was applied to the decomposition of the signal. After decomposition, the energy of the vibrating signal in some inherent frequency band was selected as the feature of the signal. Simulations and experiments were carried out to verify the divisibility of the feature, which could support the identification of target vibration feature based on coherent laser remote sensing detection.
Improved ART1 Neural Network Based Condenser Fault Diagnosis
Authors: Xu Qing Yang , Liang Ying
Published: November 2012

Condenser is an essential equipment of steam turbine. It is valuable to diagnose the fault when monitor the condenser system. To overcome shortcomings of BP neural network in fault diagnosis, ART1 (adaptive resonance architecture 1) is used to diagnose the condenser fault. The ART1 Neural network studies the typical fault features data, and realizes fault diagnosis. The results indicate the improved ART1 neural network can diagnose the condenser system fault correctly, and overcome the shortcoming of the original training algorithm. Although this is an application based on condenser, the algorithm can be used to further industrial system.
Design of Warehouse Environmental Monitoring System Based on WSN and Fuzzy-PID Strategy
Authors: Chang Bo , Zhang Xin Rong
Published: November 2012

In order to solve the issues existing in the current warehouse environmental monitoring systems, such as the complex wiring, the node power consumption, not flexible deployment and inconvenience management and so on, a warehouse environment parameters monitoring system based on fuzzy-PID strategy is designed. The system uses CC2430 as the core to develop wireless sensor nodes which completing real-time monitoring of warehouse environment temperature and humidity, uses ZigBee technology to achieve networking of wireless sensors and the automatic aggregation of monitoring data, uses fuzzy PID control technology to achieve the regulation of warehouse temperature and humidity and uses embedded database management model to achieve the sensor nodes management, environmental data management and early warning capabilities. The practical monitoring results have shown that this system has the feature of low power consumption, network flexibility, strong extensibility, friendly interface etc., which can better meet the application demands of warehouse environment parameters monitoring.
A Vehicle Heading and Attitude Measurement System Based on Earth Magnetic Field Sensor
Authors: Hu Hao
Published: November 2012

Measurement method is studied utilizing vertical gyroscopevertical gyroscopevertical gyroscope, static earth magnetic field sensor and CPU. According to electromagnetism induction law, when a wire loop incises the magnetic force line of the earth magnetic field, it will bring about the induction electromotive force, the earth magnetic field can be calculated by signal processing of induced voltage in measuring coil. A heading and attitude measuring system to vehicle are designed, the heading precision were raised. Experiment data states clearly the heading precision is not more than 0.5°. This system can be used to detect heading and attitude, and can be extended easily.
Parameter Testing Network for Electric Cars Based on CAN-BUS
Authors: Wang Sheng Xun
Published: November 2012

In order to make electric cars running stably under our control, this paper introduces a measurement network for electric cars based on CAN-BUS. There are 9 CAN nodes in the network, 8 measure nodes based on MCU for sampling 146 parameters and 1 display & record node based on PC104 for recording and displaying the information. By using flash disk, the recorded data can be transferred to PC where each parameter can be curved and analyzed. At last, it ticks off the examination result in Shandong Electric Vehicle Testing Base. The accurate measurement of the parameters, real-time record, communication normal work, data processing shows that the running motors is more stable and achieves the expected results.
Quality Monitoring and Prospects of Wire Bonding
Authors: Mei Ge Ge , Jin Bin , Gong Wei
Published: November 2012

Wire bonding is rapidly developmental technology of microelectronic packaging nearly half a century and become the main trend of semiconductor packaging field currently. This article introduces the main process parameters influencing on bonding quality, the methods to improve the bonding reliability, and prospects of developmental tendency of wire bonding.
A New Genetic Algorithm for Balancing Network Load
Authors: Ling Yong Fa , Liao Qing , Dong Yong Tao , Li Yan
Published: November 2012

This article firstly presents an optimization mathematic model of load distribution based on integer programming, and proposes an optimization method based on genetic algorithm, used for solving problems of balanced network flows with high complexity computation multi-constraint. The simulation results have verified that the algorithm is efficient and evidently improve the status that traditional SPF route algorithm tends to unbalanced network load distribution.
An Improvement of ZigBee Cluster-Tree Routing Protocol
Authors: Meng Fan Gui , Jiang Bao Chen , Wang Cheng You
Published: November 2012

ZigBee is a wireless standard for Wireless Personal Area Networks (WPANs), and it is widely used in industrial, commercial, medical fields where low energy consumption is needed. ZigBee routing protocols should be stable, reliable and low-power. Cluster-Tree routing protocol is a simple and reliable routing protocol used in ZigBee network, and it only takes into account parent-child relationships of nodes, therefore its routing path is single and inefficient. This paper improves Cluster-Tree algorithm by introducing a neighbor table. The improved routing protocol has better performance in less energy consumption and a longer life cycle of entire ZigBee network.
The Design and Realize of Activation Platform on Dynamic Simulation Test Machine of Guns
Authors: Tong Huan , Li Ling , Liu Guang Yang
Published: November 2012

In order to test the functions and relevant conditions performance of guns in non-fighting shooting situation, the dynamic simulation test platform is researched to drive gun move along body tube axis direction and vertical and horizontal action, thereby the function of man-recoil and vertical or horizontal slip is realized. by test comparison, test results indicates that the platform structure reasonable, and function reliable, can solution gun pre-war fast "examination", and pre-repair detection and after-repair test without disintegration.
Simulation and Experiment Study on the Magnetic Rheology Damper
Authors: Yao Kai , Zhao Xiao Wen , Hou Zhong Ming
Published: November 2012

To magnetic rheology damping existing device overheated, structural complicatedness, magnetic field utilization ratio low and problem of precipitating etc, accord with vehicle shock absorption proportional controlled for damping strength of damping device, design new-type magnetic rheology damping for vehicle that adopt external magnetic field bypass type and liquid one-way, and finish advanced development and test.That solve the questions that is device overheated, structural complicatedness, magnetic field utilization ratio low of the MR damper. And based on the Bingham model to carry on the modeling of MR damper, used Simulink to carry on the simulation, has analyzed the controlling current, the excitation frequency and the oscillation amplitude to the damping characteristic influence.The test indicate design magnetic rheology damping device is reasonable and effective, and accord with demand of pressure control, can offer basis on the vehicle shock absorption.
Research and Design of Portal to Integrative Data Platform for Power Dispatching System Based on Android
Authors: Tu Jing , Wang Xiao Li , Zhang Zhi Wei , Wang Liang
Published: November 2012

In order to expand the traditional applications on the desktop to smart phones, this paper designed a portal to integrative data platform for the power dispatching system based on android. The system releases data from Oracle database in the server of the dispatching center and lays them out, using MVC mode. And the system uses Web Service as middleware. The result proves that it is feasible and practicable.
Computer Simulation Technology of Precision Lapping Process of Polycrystalline Diamond
Authors: Zhang Qin Jian , Li Jian Yong , Cai Yong Lin , Wang Heng , Yang Xiao Qing
Published: November 2012

Polycrystalline diamond, (PCD) is currently used in the industry for cutting tools of difficult-to-machine materials because of its superior characteristics such as hardness, toughness and wear resistance. But the PCD material is difficult to machine due to its above properties. Before making the PCD blank in varies tools, the lapping process is essential and necessary. The lapping quality depends heavily on the parameters. Therefore it is of great significance to study the path and velocity of lapping process for ensuring the lapping quality and uniform wear of abrasive disk. In this paper, on the basis of kinematics and geometry principle, the path equation was established. The complicated lapping process can be converted into two rotation movements, i.e. the movement of part against the center of lapping disk and rotation of fixture around its center. The relative path and relative velocity of random point of the part against abrasive disk were also analyzed and calculated. The computer simulation software was developed for figuring the path curves and instantaneous velocity of the lapping process. The results show that the abrasive disk can wear uniformly and the lapping quality can be raised. The application of computer simulation software provides the possibility to analyze the lapping principles, which is a simple, convenient and effective method.
Seven Dimension Chaotic System and its Circuit Implementation
Authors: Zhu Jian Liang , Yu Chun Yu
Published: November 2012

In order to generate more complex chaotic attractors, a seven-dimensional chaotic system is constructed, and relevant chaotic attractors can be obtained by Matlab numerical simulation. Lyapunov exponents validate that the system is chaotic. Implementation circuit of this system is designed, and circuit simulation can be done by using Multisim. Circuit simulation result is identical to system simulation completely. Chaotic behavior of the system is proved farther. A new chaotic signal source is provided for practical application based on chaos such as secrecy communication and signal encryption fields.
The Numerical Simulation of Three-Dimensional Dynamic-Mesh Flow Field of a Hydraulic Buffer
Authors: Peng Song Jiang , Zhou Cheng , Yu Cun Gui
Published: November 2012

In order to study the dynamic changes of the internal flow field physical quantities in the hydraulic buffer of a special equipment, based on the Computational Fluid Dynamics (CFD), a three-dimensional incompressible and viscous model under unsteady condition is created. The model keeps the control rod of varying diameter and non-working chamber cover, simulates the turbulent in the flow field of the hydraulic buffer of the special equipment with dynamic meshing technology. From the results, the distributions of velocity in flow field and pressure in chamber are got. It shows that there are negative pressure areas in the non-working chamber and that will lead to cavitation. The results give us a great reference to improve the structure of hydraulic buffer.
Simulation of Processing Tomato Fruit-Stem Separation Based on Double Crank Mechanism
Authors: Gao Guang Di , Bi Xin Sheng , Zhu Rong Guang
Published: November 2012

In this paper, double crank mechanism is put forward to achieve separation of the processing tomato fruit-stem on the basis of analysis of the existing separation mechanism kinematic characteristics, and the rod length ratio of the desired motion characteristics has been gotten by virtual simulation platform based on ADAMS, and the rod lengths of the double crank mechanism ultimately determined are as follows, driving crank is 148mm, active crank is 178mm, link is 222mm, and driven crank is 200mm on the basis of the testing determination of the maturity processing tomato fruit-stem separation force. It is able to meet the fruit and stem separation requirements when the angular velocity of driven crank is 60r/min. It can provide a theoretical basis for engineering practice.
Study on the Optimized Blanking Allowance for Fine-Blanking with Negative Clearance through Simulation and Optimization Methods
Authors: Yang L. , Zhang Z.M. , Fan W.F.
Published: November 2012

Being an important blanking parameter, the blanking allowance of fine-blanking with negative clearance has a direct relationship with the quality of work piece and ejector force. The full process of fine-blanking with negative clearance for ASTM-1022 in different blanking allowances is simulated through the finite element analysis software DEFORM-2D, then the ejector force under different blanking allowances is measured through the experiment of fine-blanking with negative clearance. Based on the analysis of the ejector force, the proportion of burnish band and the work piece fracture, the following conclusions are summarized. The size of blanking allowance is not related with the blanking force with the sheet entering plastic state and the maximum blanking force, and is only related with the ejector force. When the value of the blanking allowance is between 0.1mm and 0.3mm, the friction force between the punch-die and the sheet affects ejector force, and the ejector force is not related with the mechanical properties of material. When the value of the blanking allowance is between 0.5mm and 0.8mm, with the blanking allowance increasing, the ejector force increases rapidly.
Simulation of Left Heart-Arterial System Using Electronic Model
Authors: Huang Xiao Yang , Feng Min , Su Mao Long , Cai Ming
Published: November 2012

An analog circuit model of the left heart-arterial coupling system has been designed to study the behavior of the left heart-arterial system. Then the state variable method was used to analyze the circuit model and establish the mathematical model. We use Matlab/Simullink tool to simulate the mathematical model. Some important parameters of the left heart circulation system, such as left ventricular (LV) pressure, left atrium pressure, aortic pressure, aortic flow, LV end-diastolic volume and end-systolic volume, can be obtained. The results are matched the actual physiological, which suggests that the model presented in this paper provides a useful tool to investigate the functional status of left heart-arterial system.
An Iterated Local Search Algorithm for Task Assignment in Distributed Computing Systems
Authors: Kang Qin Ma , He Hong , Jiang Hai Ning
Published: November 2012

This paper considers the problem of task assignment in heterogeneous distributed computing systems with the goal of minimizing the total execution and communication costs. An iterated local search algorithm is proposed for finding the suboptimal task assignment in a reasonable amount of computation time. We study the performance of the proposed algorithm over a wide range of parameters such as the problem scales, the ratio of average communication time to average computation time, and task interaction density of applications. The effectiveness of the algorithm is manifested by comparing it with other competing algorithms in the relevant literature.
Research and Realization of Highly Accurate Data Generation Based on Channel Simulator
Authors: Zheng Zhe , Lv Li Hong , Jiang Jie , Zhou Yang
Published: November 2012

With high accuracy, the channel simulator plays an important role in the docking experiment between the ground and the responder beacon. To begin with, this paper introduces the data generation algorithm including the data generation based on simulation technology, the principle of the linear least squares algorithm and then proposes the least squares quadratic spline method to generate highly accurate data in this channel simulator. Secondly, this paper introduces the system design to realize the data generation. Finally, a case which studies the approximation and an error analysis of the data generation algorithm is realized. The algorithm is considered to be accurate and easy to get the source data. The core of the algorithm is using data from Satellite Tool Kit to generate distance and speed sequence, and using the least squares to approximate real data and quadratic spline to fit for obtaining highly accurate data.
Research on Fault Diagnoses of Rolling Bearing Based on the Energy Operator Demodulation Approach
Authors: Wang Chun , Jiang De Ping , He Zheng Chun
Published: November 2012

This paper will introduce and optimize a new model of demodulation algorithm named Energy Operator Demodulation Approach to improve the limitation of the demodulation analysis widely used in many fields at present. Compared with Hilbert transform method, and optimized algorithm through Simulation test, which shows optimized Energy Operator algorithm is more simple ,faster and accurate than other algorithms. Finally, it is verified that research on fault diagnoses of rolling bearing based on the energy operator demodulation approach is very effective.
Study of Surface-to-Air Intercepting Missile Simulation Model
Authors: Li Ming , Wang Cheng Fei
Published: November 2012

To make a high efficiency surface-to-air missile system is a mainstream in world naval fleet combats under the condition of high technology, which makes the effectiveness analysis of such system very important. While the existed model is found not to fit for the missile in service. Thus, based on the analysis of combats process of the surface-to-air missile system and the theory of discrete-event simulation, the model is constructed by using Entity Flow Chart, the simulation time is advanced by using Event Scheduling, the simulation result is also given with mathematical statistics method. Finally, the paper discusses the problem of model applicability.
Study on the Principle of Yarn Splicing of Pneumatic Splicer Using Numerical Simulation
Authors: Xing Xiao , Ye Guo Ming
Published: November 2012

During the splicing process of pneumatic splicer, the principle of yarn splicing is closely related to the flow field inside the splicing chamber. This paper presents a numerical simulation of the flow char-acteristics inside the splicing chamber of the pneumatic splicer. A three-dimensional grid and the realizable tur¬bulence model are used in this simulation. The numerical results of veloc¬ity vectors distribution inside the chamber are shown. Streamlines starting from the two air injectors are also acquired. Based on the simulation, the principle of yarn splicing of the pneumatic splicer is discussed. The airflow in the splicing chamber can be divided into three regions. In addition, the simulation results have well sup¬ported the principle of yarn splicing of pneumatic splicer claimed by the splicing chamber makers.
Simulation of Wave-Maritime Structure Interactions by Using a Numerical Wave Flume
Authors: Jiang Qin , Zhang Chang Kuan
Published: November 2012

A numerical wave flume (CADMAS-SURF/2D) developed on the basis of NASA-VOF technique is used to simulate interactions between waves and maritime structures in order to verify its feasibility to maritime structure designs. Examinations and comparisons of the calculated results of wave impacts on typical maritime structures, such as caisson-type and composite breakwaters, with experimental data indicate that the numerical wave flume can be an effective computer aided design tool for the designs of coastal protection structures.