bluuebunny/crossref_metadata_2025 huggingface dataset:
A New Buffer Management Mechanism for QoS-Aware IP Router
Authors: Qiao De Jun , Jiao Hong Qiang , Ma Jun Ru
Published: March 2011

In this paper, in order to guarantee more sophisticated QoS for TCP streaming, we expand the function of output buffer control mechanism in QoS-aware IP router. Specifically, we proposed the mechanism which calculates transmission band-width and buffer volume preferentially available according to flow condition only in the QoS-aware router by measuring transmitted packets per flow. Furthermore, through computer simulation, the effectiveness of our proposal is verified.
Growth of ZnGeP2 Single Crystal by Three-Temperature-Zone Furnace
Authors: Zhao Xin , Zhu Shi Fu , Sun Yong Qiang
Published: March 2011

In order to meet the requirements of growing high-quality ZnGeP2, a crystal growth furnace with three-temperature-zone was designed and fabricated based on a conventional vertical two-zone tubular resistance furnace. Appropriate temperature gradients of 12~15°C/cm at the growth interface and stable thermal profile were obtained. A crack-free ZnGeP2 single crystal with size of Φ15mm×30mm was grown successfully in the furnace mentioned above. The as-grown crystal was characterized by X-ray diffraction (XRD) and Infrared (IR) spectrophotometers. It is found that there is a cleavage face of (101) and X-ray multiple diffraction peaks of the {101} faces are observed, The infrared transmission of a ZnGeP2 wafer of 3 mm thickness is about 50% in the region of 3~10μm. These results show the designed crystal growth furnace is suitable for growth of ZnGeP2 crystal, and the as-grown ZnGeP2 crystal has good structural integrity and high quality.
A RFID-Based Monitoring System for Abnormal Logistics Events in Internal Material Supply Chain
Authors: Cao Xiao Hua , Wan Juan
Published: March 2011

Internal material supply management for manufacturing workshops usually suffers from message delay and abnormal logistics events, which seriously holdback the reactivity capability of production system. As a rapid, real-time, accurate information collection tools, Radio Frequency identification (RFID) technology has become an important driver in the production and logistics activities. This paper presents a new idea that uses RFID technology to monitor real-timely the abnormal logistics events which occur at each work space in the internal material supply chain and proposes its construction method in details. With the experimental verification of prototype system, the proposed RFID-based monitoring system can find in time the abnormal logistics events of internal material supply chain and largely improve the circulation velocity of production logistics, and reduce the rate of mistake which frequently occurred in traditional material management based on Kanban.
Experimental Study on Engineering Performance of Portland Cement Stabilization of Soil-Bentonite
Authors: Li Xiao Yong , Zhang Zhi Gang
Published: March 2011

Slurry trench cutoff walls, constructed using self-hardening cement-bentonite (SCB) are the most common form of in-ground vertical contaminant barrier in the world, and are increasingly being used in China. As a kind of vertical anti-seepage wall material， SCB slurry is requently used for the containment of contaminated groundwater and other envirofunental Protection Projeets abroad. Domestie applieation of cement-bentonite slurry walls is not extensive. The objective of this study was to evaluate the effect of water-cement ratio and cement content on the hydraulic behavior of SCB and soil–bentonite (SB) mixtures permeated with water. The experimental program included unconfined compression tests, expansion ratio tests and hydraulic conductivity tests. The test results indicated changes in hydraulic conductivity take place due to the variation of the water-cement ratio and permeant fluid. Cement is a main material in effecting the CSB strength of unconfined compression. Cement greatly influenced the CSB permeability coefficient. Addition of Portland cement to the SB mixtures increased their hydraulic conductivity when permeated with water. The hydraulic conductivity of the SCB specimens permeated with water was inversely related to the cement content.
Research on the Scale Mark Characteristic of Start-Up Enterprise Social Network Evolution Map
Authors: Peng Hua Tao
Published: March 2011

This paper reveals the multi-stage dynamic game property of the social network evolution map of the start-up enterprise, puts forward the time value assumption, value distribution assumption and expectation value assumption of enterprise social network evolution, and constructs the scale mark characteristic model of social network evolution, and gets the result that in fixed value retained distribution method, this scale mark characteristic will be more prominent and the widths of all evolution map pedigrees’ scale marks are incremental. In one word, the evolution map scale mark will be influenced by uncertain external factors in terms of social network group value attributes.
A Study on Liaoning Ports Competition and Cooperation
Authors: Ma Jin Lin , Qian Li Juan
Published: March 2011

Relationship of competition and cooperation among ports is a hot point in studying ports relationship. The purpose of this paper is to investigate the competition and cooperation relationship among Liaoning ports. This paper applies the Vector Auto-Regression Model for analyzing the relationship. According to the modeling, it is found that Dalian Port competes with Yingkou Port and Jinzhou Port, while cooperates with Dandong Ports. From the Granger Causality test, it shows that Dalian Port causes the other three ports.
The Effect of Nb-Ti on Cold Rolling Texture and Recrystallization Texture of B4003M
Authors: Liu Yan Dong , Yang Yi Qiao
Published: March 2011

In this study, the effect of different compositions of the stabilized elements of Nb-Ti for cold rollling textures and the recrytalization textures of B4003M has been investigated. Cold rolling texture at 80% reduction displayed by the Nb-Ti added specimen is the weakest of all. When annealing at 900°C for 10 min, the recrystalli -zation textures displayed by the Nb-added, Ti-added, Nb-Ti-added and Nb-Ti-free alloys are compared. Results show that: {111} recrystallization texture in Nb-added alloy is the strongest, whereas it in the Nb-Ti-free alloy is the lowest. The mutual effect of Nd and Ti on refining the grain size is more obvious than the single element effect, while Nd is more effective than Ti.
Application of Data Fusion Based on Least Squares in Sediment Concentration Data Processing
Authors: Liu Ming Tang , Fu Li Bin , Xin Yan Hui , Li Li
Published: March 2011

In the process of measuring the sediment concentration in flow-water, the temperature in the water will greatly influence the output of the capacitive differential pressure sensor. This paper uses least squares method to fuse the results of experiment to eliminate influence of the temperature and depth． The system uses value of the capacitive differential pressure sensor, the temperature sensor and the depth sensor as input . This paper particularly introduces principle of the least squares method, PLC hardware design and multi-channels data fusion technology. The results indicate that data fusion method based least squares can obtain accurate and steady outputs.
Study of Online Resources Data Mining Based on Association Rules
Authors: Li Xiao Feng
Published: March 2011

This article related to the analysis of user access logs, dig out the pages the user visits a page with certain relevance and recommended to the user, that user interest in knowledge. At the same time, the use of association rule analysis of user-specific behavior patterns, the network administrator to find out as much as possible data insecurity, the mining process for data collection, preprocessing, mining frequent access patterns and recommended set of generation.
A New Stretching Process: Slant Forging Method
Authors: Ni Li Yong , Yu Suo Qing , Li L. , Zhu S.Y. , Huang Hua Gui
Published: March 2011

High transversal properties requirements of heavy axial forgings, traditionally, often are met through the selection of high-performance materials, the improvement of metallurgical quality and repeated forging. But the production costs and power consumption are both high. A new slant forging method is adopted, by controlling the metal flow direction in forgings, to achieve the increase of transversal mechanical properties. Finite element method was applied to study the influence of forging process parameters on flow lines in axial forgings, providing theoretical guidance for the eventual realization of the forging method.
Effects of Low Frequency Electromagnetic Field on Cold-Shut Formation during Aluminium Alloy Hot-Top Casting
Authors: Wang Xiang Jie , Cui Jian Zhong , Zuo Yu Bo , Zhu Qing Feng
Published: March 2011

On the basis of conventional hot-top casting, low frequency electromagnetic field was applied in the process of hot-top casting to produce 7050 aluminum alloy ingot, the influences of low frequency electromagnetic field on cold-shut have been studied. The experimental results show that under the effect of the low frequency electromagnetic filed, the depth of cold folding has been decreased, and the as-cast structure has been refined. The reasons for low frequency electromagnetic field improving the surface quality, refining the structure of the ingot were summarized.
The Research of Complex Network on Archives Blog
Authors: He Yi
Published: March 2011

At the background of archives blog on Internet, this paper constructs a directed complex network model, and analyzes the network characters such as degree distribution. To verify its efficiency, we collect blogs’ information and set up a complex network..From the analysis result of the simulation and demonstration network, we know that they have the same characters, which show that, the virtual society network has small-world effect and scale-free character compared with real society network. The results indicate that the establishment of archives blog is favor to spread rapidly archives information, improve information sharing efficiency and promote the development of archives technology.
Performance Simulation Study of Power Split Continuously Variable Transmission (PSCVT)
Authors: Zhang Lan Chun , Bei Shao Yi , Zhao Jing Bo
Published: March 2011

This paper is concerned with the power and fuel economy performance simulation study of power splitcontinuously variable transmission(PSCVT). Firstly, mathematic model of PSCVT is established and the shifting rule is designed based on the introduction of PSCVT working principle; Secondly, the fuzzy-PID controller is designed according to the control requirements of electronic control system; Thirdly, the vehicle model with PSCVT and engine model are established to carry out the PSCVT power and fuel economy performance simulation. The simulation results indicate that the vehicle fuel consumption with PSCVT is reduced distinctly with the same power performance.
Surrounding Rock Classification in Deep Roadway of Coal Mine
Authors: Liu Bin , Liu Quan Sheng
Published: March 2011

With the increase of mining depth，most coals in China have been deep mining stage. Compared to the shallow roadway, the characteristics of deformation-failure of surrounding rock show significant differences in the deep roadway, and the deep rock features of the surrounding rock are not considered in the traditional classification of roadway. So it is needed that systematical study on the surrounding rock classification for the stability evaluation of the deep roadway to meet the demand of the support design and the construction of the deep roadway in coal mine of China. The paper puts forward classification system of surrounding rock in deep roadway of coal mine according to on-the-spot geological investigation, rock ultrasonic testing, in-situ ground stress testing and comprehensive analysis on the surrounding rock stability of deep roadway in typical ore area.
Scheme Design for Machine Based on Black Box-Gray Box Theory
Authors: Wu Ruo Mei , Liu Dai An , Xiao Ying Zhe
Published: March 2011

The design scheme of machine product can be newly explained by applying the black box theory, this design pattern is a combination of functional and structure design method. The method was finally expanded into black box theory and gray box theory. With the help of black box-gray box theory, the design outlines were made, the transform elements of mechanism were programmed, and then the technical process and functional structure of machine were realized. The black box graph, the grayed black box graph, and gray box graph were used to describe the design process in sequence. The scheme design was changed to be a gradually improved process. If the design methods of black box-gray box theory were deepened, the next system design can be called the design of the white box which was the concrete implementation of scheme design. In this work, the black box-gray box theories were successfully applied to investigate the machine design scheme for the projection model of customer’s requirements.
Research on Supplier Collaborative Product Development Mechanism under Condition of Manufacturing Outsourcing
Authors: Hao Hao , Zhun Bian
Published: March 2011

The pressure of financial turmoil and global competition drive domestic manufacturers to seek additional profit space besides low-cost labor and raw materials so that they could gain more competitive strength than the other companies in the world. The article maintains that in the manufacturing outsourcing environment domestic manufacturers could effectively reduce cost, shorten R&D cycle time and improve product quality in the manner of collaborative product development with outsourcing suppliers. With supply chain management and synergy theory, the article makes analysis of the definition for supplier collaboration, and then summarizes main activities of collaborative product development including specification, concept design, detail design and product design. Meanwhile, collaborative product development shall satisfy 6 key preconditions. Based on this, the article brings forwards the mechanism of collaborative product development, which is concerned with 5 phased key activities and collaborative manner from customer requirement to initial operational testing. Eventually, predict that collaborative mechanism need to be further analyzed under industry background From the beginning of the 21st century, the variation of macroscopic and microscopic environment that the global industrial field has faced was far fiercer and much more difficult to forecast than ever before. Now mass manufacture can only be accomplished by close cooperate with outsourcing partners, because of the new globalized manufacture network is becoming more and more digitized, decentralized, virtualized, intellectualized and agile. In last few decades, Chinese production has won innumerable outsourcing orders by the advantage in low cost and flexibility, which built a solid foundation of the trade surplus of China. However, in the past two years, because of the financial crisis, RMB appreciation, prices of raw material shy rocketed, and the rigorous quality and service requirement which customers always asked, the profit margin of Chinese manufacturing businesses become much smaller than ever. If these manufacturing companies keep going as before, the existing advantage they have would be soon eroded. Therefore, from ideality of supply collaborative, if these outsourcing companies can build a close relationship actively with their supplies who could significantly affect the total cost of these outsourcing companies, by using the advantages and experience these supplies have, they can design products cooperatively, save cost from the beginning, shot the development stage, and create a significant positive impact on the price and quality of the end products of these outsourcing companies
Numerical Analysis of Inner Flow Field for Disk MRF Brake
Authors: Liu Cheng Ye , Yi Feng Yan , Jiang Ke Jun
Published: March 2011

According to structure of disk MRF brake computational model of inner flow field for MRF was set up at simplified condition when MRF was regarded as Bingham model. Velocity distribution in inner flow field had been analyzed at different brake velocities and magnetic intensity using finite volume method (FVM), and brake torque and power had also been received at the same condition by integral method. Numerical analysis data were compared with theoretical data. Result showed that velocity distribution of inner flow field was not linear at axial direction, and that brake torque of disk MRF brake was constant approximately, and that numerical data and theoretic data were identical and it can provide reference for design.
Application of Multi-Spectral Imaging Technique in the Determination of Leaves Nitrogen Level of Fruit Tree
Authors: Yang Hai Qing , Lv Gang
Published: March 2011

A new optical instrument for fast determination of pear leaves nitrogen status was designed and fabricated. A multi-spectral imaging system was used as optical detector. In the paper, the principle of multi-spectral imaging for the measurement of leaves nitrogen status was first introduced. Then, the method of using error back propagation artificial neural network (BP-ANN) for calibration modeling was elaborated. Mean reflective light intensities in all images covering blue, green, red and infrared wavelength were taken as the input data to BP-ANN. The structure of BP-ANN with three layers has been optimized to minimize its calibration error. In the test, total 200 leave samples picked from Huang-hua pear trees planted in three orchards with different nitrogen fertilizing schemes. Among them, 150 samples were selected randomly out as for calibration set with the remaining 50 for prediction set. The result shows that correlation coefficient of R2 between predicted and measured values of nitrogen content reaches 0.82 with maximum prediction error less than 4.72(SPAD). The study suggests that the new optical method integrating multi-spectral images with BP-ANN is promising for fast diagnosis of fruit tree nutrition status.
The Image Watermarking against Shearing Based on Dopplerlet Transformation
Authors: Deng Ming Hui , Li Wen Zhe , Li Qi Chen
Published: March 2011

In this paper, a robust image watermarking method in two-dimensional space/spatial-frequency distributions domain is proposed which is robust against geometric distortion. This watermarking is detected by a linear frequency change. The dopplerlet transformation is used to detect the watermark. The chirp signals are used as watermarks and this type of signals is resistant to all stationary filtering methods and exhibits geometrical symmetry. In the two-dimensional Radon-Wigner transformation domain, the chirp signals used as watermarks change only its position in space/spatial-frequency distribution, after applying linear geometrical attack, such as scale rotation and cropping. But the two-dimensional Radon-Wigner transformation needs too much difficult computing. So the image is put into a series of 1D signal by choosing scalable local time windows. The watermark embedded in the dopplerlet transformation domain. The watermark thus generated is invisible and performs well in StirMark test and is robust to geometrical attacks. Compared with other watermarking algorithms, this algorithm is more robust, especially against geometric distortion, while having excellent frequency properties.
The Structure and Curing Acceleration of PMUF Resins with Sodium Carbonate
Authors: Gao Zhen Zhong , Liao Feng
Published: March 2011

The phenol-melamine-urea-formaldehyde (PMUF) cocondensed resin adhesive was prepared by using phenol, urea, melamine and formaldehyde as reactants. It was characterized by 13C NMR and the results indicated that the PMUF could reduce the content of free formaldehyde, and it could make wood-based panel with high water resistance and weatherability. Sodium carbonate (Na2CO3) was able to shorten the curing time by 40% when applied to the plywood process. The addition of Na2CO3 as the curing accelerator of a PMUF had little influence on the bonding strength of waterproof layer and could shorten the hot-press time.
Theoretical and Simulative Study on Hydraulic Bridge of Water Hydraulic Servo Valve
Authors: Wang Xin Hua , Chang Jia Qing , Sun Shu Wen , Zheng Gang
Published: March 2011

An analysis has been conducted on the hydraulic bridge of the water hydraulic servo valve with annular clearance between sleeve and spool land as its first hydraulic resistance. Through some formula deductions, the simplified hydraulic bridge is drawn and the relationship between flapper displacement and differential pressure of spool ends, which is demonstrated by the subsequent simulation works, is extracted. By the CFD(computational fluid dynamics) simulation, firstly, the pressure distributions of the flapper face and the fore end face of the nozzle are obtained. Results show that the flapper has an annular area where the existing pressure is negative. Secondly, the relationship between flapper displacement and flow force acting on flapper is also acquired, which is much beneficial to the steady-state and dynamic analysis of the water hydraulic servo valve.
Simulation Research on Electric Dominant Strategy of Plug-in Hybrid Electric Vehicle
Authors: Shi Qing Sheng , Xu Hui Yi
Published: March 2011

As a promising technology that uses electricity to displace petroleum consumption in the vehicle fleet, plug-in hybrid electric vehicle’s performance is due to its control strategy. Traditional hybrid electric vehicle methods, such as charge balance strategy, could not fit it so much. An electric dominant strategy (EDS) is presented for plug-in hybrid electric vehicle. Two parameters, including battery SOC and vehicle velocity are chosen as threshold to coordinate the operation of fuel converter (engine) and energy storage system (batteries). Finally, compared to Charge Balance Strategy (CBS), simulation experiments are carried on electric vehicle platform ADVISOR software. Simulation results show the validity of EDS.
New Delay-Dependent Approach on Stability for Systems with Interval Time-Varying Delay
Authors: Zhang Tao , Cui Yan Qiu , Wang Juan , Sun Jin Sheng
Published: March 2011

In this paper, the stability of systems with interval time-varying delay is investigated. The time delay varies in an interval. By employing a new and tighter integral inequality and constructing an appropriate type of Lyapunov functional, the delay-dependent stability criteria are derived. Because neither any model transformation nor free weighting matrices are employed in the theoretical derivation, the developed stability criteria significantly improve and simplify the existing stability conditions.
Research on Word Sense Disambiguation
Authors: Zhan Jing Wen , Chen Yan Min
Published: March 2011

At present, how to make the computer understand the text message of humanity automatically is a very important issue in computer information technology field. And the problem of word sense disambiguation is a bottleneck of the understanding of natural language. This paper describes the current research situation of word sense disambiguation, introducing its background and application, analyzing various mature approaches, comparing the merits and shortages of those methods, taking a brief introduction of context and international evaluation method of word sense disambiguation and finally making a conclusion of its future and development trend.
Performance Comparison of Interdigitated Thin-Film Field-Effect Transistors Using Different Purity Semiconducting Carbon Nanotubes
Authors: Narasimhamurthy K.C. , Palathinkal Roy Paily
Published: March 2011

In this paper, we present the fabrication and characterization of semiconducting carbon nanotube thin-film field-effect transistors (SN-TFTs). High-k dielectric material, hafnium-oxide (HfOX) is used as the gate-oxide of the device. A Thin-film of semi-conducting single walled carbon nanotube (SWCNT) is deposited on the amino-silane modified HfOX surface. Two types of SN-TFTs with interdigitated source and drain contacts are fabricated using 90% and 95% purity of semiconducting SWCNTs (s-SWCNT), have exhibited a p-type behavior with a distinct linear and saturation region of operation. For 20 µm channel length SN-TFT with 95% pure s-SWCNTs has a peak on-off current ratio of 3.5×104 and exhibited a transconductance of 950 µS. The SN-TFT fabricated with HfOX gate oxide has shown a steep sub-threshold slope of 750 mV/decade and threshold voltage of -0.7 V. The SN-TFT of channel length 50 µm has exhibited a maximum mobility of 26.9 cm2/V•s.
Simulation Research on Control Technology of Micro-Particle Adhesion to Surface
Authors: Liu Hui , Li Yan Qiang
Published: March 2011

The micro particle brings much harm to some industrials, agriculture and human activities. The mechanical models of micro particle adhesion to the surface and the control, disposal technology have become very important for prevention from particle aggradations. For the sake of deeply comprehending and researching the adhesion mechanism as well as kinematics characteristic, numerical simulation of particle adhesion was made based on compute simulation package, the analysis of results and relevant comparison demonstrate that it can well simulate actual state and the results of simulation show that the capillary force (Fc) is the biggest, by contrast, the electrostatic force (Fes) is the smallest. Further more, it has some valuable instructions and helpful references for control of micro-particle adhesion to surface. At last, the outlook of issue was put forward.
Environmental Performance Evaluation Basing on Fuzzy Mathematics
Authors: Sun Wei
Published: March 2011

This paper analyzes the situation of environmental performance evaluation. It research a range of environmental performance evaluation index. Environmental performance is assessed based on fuzzy mathematics in the paper. The paper describes the theoretical framework of this method, and conduct case studies. Research shows that this method is scientific and objective
Design and Analysis of Hydraulic Full-Bridge Network for Water Hydraulic Servo Valve
Authors: Wang Xin Hua , Zheng Jian , Li Wei , Sun Shu Wen
Published: March 2011

Annular gap throttle has been used in water hydraulic slide valve which makes the hydraulic full-bridge network of the water hydraulic servo valve different from that of traditional hydraulic servo valve with fixed orifice. Based on liquid resistance theory and hydraulic bridge theory, the load pressure characteristics, pressure sensitivity and static characteristic parameters have been analyzed by the research of hydraulic full-bridge network constituted by annular gap throttle and clearance throttle between flapper and nozzle. The results show that the load pressure characteristics of the hydraulic full-bridge in water hydraulic servo valve keep fine linear relationship with flapper displacement, but the pressure sensitivity decreases in the normal working range of servo valve. However, the pressure sensitivity can achieve a reasonable value by the improvement of hydraulic full-bridge.
Surface Modification of Wool Fibers by Ecologically Ozone-Assisted Treatment
Authors: Wan Ai Lan , Yu Wei Dong
Published: March 2011

Wool fiber was modified using ecologically acceptable ozone-assisted treatment (ECO) in this study. Chemical and mechanical analysis of the treated samples compared with the untreated and Basolan○,R88 treated ones are reported. An atom force microscope (AFM) results show that the crimple was generated on the surface of ECO treated wool fiber and the peak-to-valley decreased slightly. However, Fourier transforms infrared spectra (FTIR) results suggest the absorbency and the oxidation of disulfide bonds increased after the ECO treatment, especially at 1024cm-1. The crystallinity of the treated wool fiber slightly increased based on the X-ray results. The treatment also led to reduction in strength of the wool fiber.
A Novel Method for Representation of Spectral Images Based on Color Matching Functions
Authors: Chen Qiao , Wang Li Jie , Westland Stephen
Published: March 2011

Spectral images contain a large volume of data and the development of multispectral imaging systems places considerable demands on computer hardware and software compared with standard three-component or trichromatic image storage and processing. This study is concerned with lossy compression techniques for spectral images since many color images are intended for display for human perception and it is well established that images contain redundancies (in terms of their color, spatial and temporal properties) that can be removed without any loss in image quality. The lossy compression technique that is considered in this work is a low-dimensional linear model of spectral reflectance, with which the basis function are derived from color matching functions that are correlated with human visual system.
Variable Precision Rough Set Optimization Algorithm for Constructing Decision Tree
Authors: Song Xu Dong , Mu Jian Wei , Feng Rui Fang , Qiu Zhan Zhi
Published: March 2011

The calculation of Variable precision explicit region is an improved algorithm for constructing decision tree on the use of variable precision rough set model. For defects in the process of calculating the explicit region—in the process of calculating the explicit region, the more the number of attributes is, the greater the value of specific areas is, it puts forward the calculation algorithm that the number of attributes limits specific area. This algorithm enhances the accuracy of the calculation process. It can effectively reduce the trend that the more the classification of attributes is, the greater the greater the value of specific areas is. In the meanwhile, it also effectively improves the accuracy of the algorithm. By introducing the support and confidence, it simplifies the resulted tree, and improves the generalization ability of the tree. Finally, the validity of the method is verified through experimental analysis.
Finite Element Analysis and Calculation of Tongue-Tearing Process of Woven Fabric
Authors: Wang Ping , Sun Bao Zhong
Published: March 2011

Tearing is a common failure type during the service life of woven fabric. In this paper, tongue-tearing strength of a tight twill-woven fabric with weave structure of was tested on the Material Test System (MTS810.23). A Finite Element (FE) model was developed with FE simulation software ABAQUS based on the geometrical characteristics of the woven fabric. With this meso-modeling method, the whole tongue-tearing process was dynamically displayed. Tearing strength and failure morphologies were compared between FE simulation and experiment result, and good agreements were found. Also, a mesh scheme independent research was conducted for this FE model.
Research on Force Reflecting Control System
Authors: Hu Wen Song , Zhu Min
Published: March 2011

This paper presents a new algorithm of force refelecting te;epresece control system, which improve the s control signal quality. The author discusses the reasons and factors that cause the noise and put forward the solution method. Then this paper leads the model of stochastic resonance into force telepresence system and designs an effective force telepresence system which can check and make use of the stochastic noise. At the end of this paper, a case is simulated to verify the correctness of this control system.
Research on New Control Module
Authors: Hu Wen Song , Zhu Min
Published: March 2011

This paper brings up a design idea based on EPLD, which describes the complicated AC sampling logic time sequence design, such as frequent tracing, phase compensation, voltage and current asynchronous sampling control, data storage and interrupt response with AHDL language. Those functions can be totally brought into effect in EPLD. At the end of this paper, the author brings up the design principle and related program.
Research on Time Delay Stability
Authors: Hu Wen Song , Zhu Min
Published: March 2011

This paper brings up the module of time delay stability analysis. The author establishes the time delay dynamics equation of force reflection telepresence system, and then analyzes the time delay stability of force reflection telepresence system in the elastic environment by using the system of differential and differences equations. Furthermore, this paper discusses the effects of the parameters in the model and defines the limits of time delay. At the end of this paper, a case is simulated to verify the correctness of this module.
Study on Cost Management under EPC General Contracting Model
Authors: Zhong Jin Ru
Published: March 2011

As a new mode of implementation for the construction project, EPC mode is more and more highly praised by owner and contractor. The owner can reduce the risk through implementing this mode and make the price of project relatively regular at the same time. However, because the owner seldom participates in this mode, in addition, the same contractor charges design and construction of the project, the owner’s controls to the price of project becomes more and more difficult. This paper discusses reasonable determination and effective control method and means to the price of the project under EPC mode according to the characteristic.
Ni Layer Evolution of FeCrAl Substrate Treated by Ultrasonic and Electroplating Methods in Long Term Oxidation at 900°C
Authors: Sebayang Darwin , Yanuandri Putrasari , Ade Firdianto , Hasan Sulaiman B. , Bin Otman Ashraf , Untoro Pudji
Published: March 2011

The long term oxidation test of FeCrAl substrate treated by ultrasonic and electroplating methods was performed at 9000C in air environment for 100 hours. The purpose of this paper is to show the nickel layer evolution of that substrate. Oxide scale and layer evolution were assessed on specimens using scanning electron microscope (SEM) coupled with energy dispersive X-ray spectroscopy (EDX). The nickel layer disappeared and fully converted to be nickel oxide on FeCrAl treated using ultrasonic and nickel electroplating after oxidation exposure at 9000 C in air for 100 hours. In this condition, the nickel oxide still existed. Not only nickel oxide and Al2O3 were occurred when oxidation exposure at this condition but also Cr2O3 and Fe2O3. The lowest parabolic rate constant was obtained from FeCrAl ultrasonic treatment with SiC for 50 minutes at 1.21 x 10-4 mg2mm4h-1, and FeCrAl ultrasonic treatment with Al2O3 for 30 minutes at 1.15 x 10-4 mg2mm4h-1. The lower parabolic rate constant indicated the higher long time to failure of the FeCrAl substrate.
Studies on Commercial District Alliance Governance and Integration Governance Mode Selection
Authors: Zhang Jian , Wang Chen , Zhang Li Juan
Published: March 2011

In the actual course of commercial operations, governance mode is mainly divided into two categories: alliance mode, leading by real estate developer, and integrated mode, leading by commercial operators. The transaction efficiency and cost vary corresponding to the different mode. In this paper, based on the traditional market, hybrid and hierarchical mode framework in transaction cost theory, inframarginal theory and the actual Chinese commercial management, the author discusses the existing conditions of market, hybrid and hierarchical mode, verifies that the complete market mode in the actual operation process does not exist, at the same time, deeply analyses boundary conditions for the existence and basis for decision making of the alliance mode and integration mode.
Trajectory Modeling of Moving Objects Based in Spatio-Temporal Database
Authors: Liu Jun , Li Jing Wei
Published: March 2011

Trajectory modeling of moving objects is one of the key problems in spatio-tempo-ral databases research. In a series of moves spatio-temporal database information and finding time to update in actual application space and threshold distance threshold, this paper combines the ideas of the linear regression model in mathematics to propose the trajectory model, which is on the basis of the Moving Objects Spatio-Temporal model and supports the past, present and future information processing. It effectively predicts the moving objects of movement trend and scope at any time within the threshold.
Radially Symmetric Deformation of Spherical Shell Composed of Composite Compressible Hyperelastic Materials
Authors: Niu Da Tian , Yuan Xue Gang , Deng Hong Mei
Published: March 2011

In this paper, we investigate the radial compression and inflation of a spherical shell composed of two compressible hyperelastic materials. We first establish the mathematical model of this problem as a second order nonlinear differential equation with two boundary conditions, and then transform it into a system of first order nonlinear differential equations. By using dimensionless transformation, we obtain the parametrical analytic solution. Finally, the results of the numerical simulation are given. We analyze the influence of the material parameters and the structure parameters on radial deformation of the spherical shell. These results well fit the practical phenomena.
A Research on the Control System of Wind Power Grid-Connected Inverter
Authors: Guo Jian , Song Li Gang , Yang Yong
Published: March 2011

PWM inverter, as the main part of wind power grid-connected system, directly determines the quality of the power sent finally to grid. It has become the focus of research to develop a high-performance inverter control system. Based on the analysis and establishment of the mathematical model of the grid inverter system, the vector control strategy based on the voltage directional technique is analyzed in this paper. It consists of two closed loops. The fluctuation of direct voltage is suppressed due to the existence of voltage outer loop. Current inner loop realizes the independent control over meritorious electric current and reactive current through the feedforward of grid voltage and the decoupling of grid-connected current, which makes the inverter power factor close to 1.
Optimization for Design of PID Controller Based on Improved PSO
Authors: Zhu Jin , Kang Wei , Zhang Xiu Mei
Published: March 2011

A new algorithm which is the average local best position is presented to replace the local best of the traditional velocity update rule. One particle can acquire more messages of the other particles to adjust is movement in this method. Integrating PSO algorithm with PID controller, the three parameters of the PID controller can be optimized, which has the features of simple structure, easy implementation and robust performance. The simulation shows the PID controller integrated with the improved PSO algorithm achieved a good performance.
MILP Sensitivity Analysis for Short-Term Scheduling of Batch Plants under Uncertainty
Authors: Zhu Jin , Zhang Xiu Mei , Kang Wei
Published: March 2011

In this paper, An integrated framework is developed to handle uncertainty in short-term scheduling based on the idea of inference-based sensitivity analysis for MILP problems and the utilization of a branch and bound solution methodology. The proposed method leads to the determination of the importance of different parameters and the constraints on the objective function and the generation and evaluation of a set of alternative schedules given the variability of the uncertain parameters. The main advantage of the proposed method is that no substantial complexity is added compared with the solution of the deterministic case because the only additional required information is the dual information at the leaf nodes of the branch-and-bound tree. Two case studies are presented to highlight the information extracted by the proposed approach and the complexity involved compared with parametric programming studies.
A Combined Middle-Long Load Forecasting Model Base on Differential Evolution Method
Authors: Niu Dong Xiao , Wang Jian Jun , Li Li
Published: March 2011

Middle-long load forecasting is an important issue for power system’s plan, investment and operation. In this paper, differential evolution algorithm is used to determine the weights of the Combined load forecasting models, which is combined with several single middle-long forecasting models. The experiment results point out that the proposed model’s performance is better than any single forecasting model. It also shows that differential evolution algorithm can choose the weights of combined forecasting model effectually.
Testing-Point Optimizing Technology Based on PSO in Fault Diagnosis
Authors: Pan Hong Xia , Huang Jin Ying
Published: March 2011

In this paper, for such a complex dynamical system as gear box, the transfer characteristic model of different excitation points and responsive points is constructed. Considering the actual condition that the vibration signals from different parts the inner gear box arrive in the box’ surface by different paths and mutual mixes, the basic method on sensor optimization and testing-point configuration based on PSO is put forward for fault detection. Through the testing analysis of every point’s transfer characteristic curve and the optimization of the transfer characteristic parameters, it is not only gives the basic optimization principle of testing configuration, but also proves that the sensor and testing-point optimal configuration technology based on PSO is feasible.
Preparation and Properties of UV Curable Silica Coatings from MPTMS and TEOS
Authors: Liao Feng , Zeng Xing Rong
Published: March 2011

UV curable 3-(trimethoxysilyl) propyl methacrylate MPTMS modified silica hybrid coating was prepared through sol-gel process from TEOS and MPTMS in acid medium for different ratios between TEOS and MPTMS. The structure of the hybrid coating and the formation of inorganic-organic hybrid networks were studied by FT-IR. It was found that the organic networks were formed by the polymerization of C=C bonds at 1638 cm-1. The influences of the photoinitiator content and the curing time on the curing degree of the mixture system were investigated. The results showed that the optimal photoinitiator content was 3%, and curing time was 180 s. The thermal stability of the UV cured coating was investigated by TG-DTA. The results showed that the contents of low-molecular compounds such as H2O, CH3OH, etc. were decreased in cured coatings with the increasing of the MPTMS concentration, thus significantly decreasing of the thermal weight-loss at temperature lower than 400°C.
Study on Transformation Rules of Diesel Fuels Contaminated Aquifer
Authors: Qu Zhi Hui , Zhao Yong Sheng , Wang Bing , Jiao Li Na
Published: March 2011

Study on migration and transformation rules of diesel fuels pollution by using two-dimensional plexiglass tank to simulate underground aquifers. Through regular monitoring of the sampling ports in total petroleum hydrocarbon content of the water to determine the diesel fuels in the medium sand aquifer in the migration process, and compute out parameters of diesel fuels pollution in the medium sand aquifer in the mathematical model of migration. This prediction of diesel fuels pollution in the migration of sand media. The results showed: the highest values of different sampling ports used by the time its location is closely related to distance to sources, the concentration rose to the highest value used in a short time. The sampling ports far away from the pollution spilling place rose to the highest value of concentration used in a long time. After diesel fuels leaked 40 d later, the simulation of pollutants reached the bottom slot, and diesel fuels can be calculated transfered with a speed of 1cm•d-1, and then after 20 d more, TPH can be moved to simulate the water tank side pollution of the aquifer region.
A New Optic Senor for Real-Time Bath Temperature Measurement in a BOF
Authors: Zhang Meng , Chen Yan Ru , Xu Ling Fei , Wang Yong Qing
Published: March 2011

A robust, non-contact sensor that measures BOF endpoint bath temperature has been developed and evaluated over a large number of industry heats. The optical hardware consists of a radiation collection head and a multi-wavelength detection unit. The radiation collection head aimed at the furnace mouth is used to collect, and thus enhance, the effective radiant energy emitted from the hostile environment adjacent a furnace as well as to reduce spurious radiations from other nearby furnaces. The detection unit separates the collected radiations into spectroscopy and then converts this spectroscopy into digital signals. Finally, the signal information is processed to determine the carbon content of the steel contained in the metallurgical furnace. The Preliminary results after online carbon content sensing are discussed.
Equidistant Five Wavenumbers Selection for NIR Spectroscopy Analysis of Glucose in Human Serum
Authors: Pan Tao , Xie Jun , Shan Yu , Chen Hua Zhou
Published: March 2011

Using Fourier transform near-infrared (FTNIR) transmission spectroscopy and multiple linear regression (MLR) method of the equidistant wavenumbers combination, the quantitative analysis models of human serum glucose were established, and discrete wavenumbers combination was optimized. The optimal models were found in the five equidistant wavenumbers combinations with 7 and 40 gaps.The center wavenumber of the optimal models with 40 gaps in the first overtone region and combination region were 7970 and 5880 cm-1 respectively, and the corresponding RMSEP were 0.371 and 0.389 mmol/L respectively. While the center wavenumber of the optimal models with 7 gaps in the combination region and first overtone region were 5795 and 8041 cm-1 respectively, and the corresponding RMSEP were 0.395 and 0.407 mmol/L respectively. The above four models had a good prediction effect, and could provide basis for designing minitype special NIR spectroscopy instrument.
A Simiple Method to Speed up the Calculation of a Computer-Generated Hologram
Authors: Wang Huai Sheng , Xia Hui Feng , Zhou Zhi Guang , Jian Xian Zhong
Published: March 2011

The calculation speed is one of most dofficult problems for a computer-generated hologram of an object. This is due to the facts that both the pixel number of an object and that of the hologram are very large. In this paper we calculate the computer-generated hologram of an object by a difference method and translation symmetry. The main operation of the difference method is addition which is faster than multiplication and division. By translation symmetry of pixels of the object and holgram plane, we can void many repeating calculations. Thus oue method can speed up the computer-generated hologram of an objec. The computer simulation result proves that our method is effective.
A Real-Time Algorithm for Convex Hull Construction and Delaunay Triangulation of Scattered Points Data
Authors: He Xue Ming , Lu Yi , Li Cheng Gang , Ni Min Min , Hua Chen Liang
Published: March 2011

Convex hull is a very important data structure of computational geometry design. This paper presents an algorithm to construct the convex hull of a set of scattered points by coordinates and relative angle method. The algorithm determines the convex vertexes and eliminates some non-convex vertexes, which greatly reduces the searching scope and the complexity. Delaunay triangulation is widely used in 3D surface reconstruction. Due to its duality, Delaunay triangulation is usually constructed through Voronoi diagram. Delaunay triangulation is directly constructed in this paper. The algorithm is simple, stable and easy to implement, especially for less data points.