bluuebunny/crossref_metadata_2025 huggingface dataset:
Research on Attitude Control of Spacecraft Based on ADRC
Authors: Teng Fu Lin , Ge Hong Yu , Li Hong Sheng , Zhang Jian Hua
Published: November 2011

Modern spacecraft demands from an attitude control system very high performance and accuracy, and many new features, such as disturbance rejection capability. The recently developed active disturbance rejection control technology is applied to the attitude control of spacecraft subject to disturbances and parametric uncertainties. Simulation and experiment show significant advantages of the proposed attitude controller over the controller resulting from conventional PID approach.
Predatory Search Strategy for Load Distribution of Multiple Chiller Water Units for the Purpose of Energy Saving
Authors: Zhang Jun , Zhang Kan Yu
Published: November 2011

In this paper, two chiller water units connected in parallel working using the predatory search strategy was observed. Predatory search strategy has been applied to solve the optimal load distribution strategy problem for the cooling system constituted by multiple chiller water units, which has the characteristic such as complexity, constraint, nonlinearity, modeling difficulty, etc. Compared with the conventional method,the results indicated that the predatory search strategy algorithms has much less power consumption and is very suitable for application in air condition system operation.
Processing Method for the Node of Wind Farm in Power Flow Calculation
Authors: Zhang Jian Ping , Yan Zhi Jiang , Ding Quan Fei
Published: November 2011

At present, there are two kinds of common generators in wind farms, which are induction generators (IG) and doubly-fed induction generators (DFIG). Based on the steady state mathematical models of these two kinds of generators, the processing methods of wind farms in power flow calculation are given. The core idea is to express active power of the generator by a function of wind speed and to express the reactive power by a function of active power, slip and terminal voltage, and then the Jacobian matrix will be corrected according to the relation between terminal voltage and reactive power in the wind farm node. Finally, the IEEE 14-bus test system including wind farm is applied for power flow calculation and analysis. The numerical results show that the mentioned methods are feasible and can satisfy the requirements of the engineering application, which can pave a foundation for further research.
Research and Evaluation on Environmental Economic Dispatch Including Wind Farm Based on Relative Entropy Balance
Authors: Zhang Xiao Hui , Lu Zhi Gang
Published: November 2011

This paper analyzes the factors on dynamic economic dispatch including wind farms. Environmental economic dispatch model including wind farms is proposed. Considering the thermal power generation cost, thermal power polluting emissions and low cost of wind power generation, the objective function is to minimize the total cost in system. Environmental economic dispatch including wind farm is studied with chaotic ant colony optimization algorithm which has advantage of strength searching capability and fast optimizing. Meanwhile, the application of the relative entropy balance theory is on evaluation and selection to the decision results. The simulation results show the model and algorithm are correct and effective.
A Novel Protection of Transmission Lines for Two ±500kV HVDC Systems Erected on the same Tower
Authors: Huang Min , Wang Gang , Luo Hui Hui , Liang Yuan Sheng
Published: November 2011

Up to now, there is no precedent of applying two bipole lines (TBL) on the same tower technology of long-distance HVDC transmission project in the world. Owing to mutual influence between the two HVDC circuits on the same tower, the traditional protection of transmission line is faced with technical difficulties on fault pole identification, especially high grounded fault loop impedance. A new protection scheme of transmission lines for the double ±500kV HVDC circuits on the same tower is proposed. Based on electromagnetic decoupling method for TBL on same tower is proposed by analyzed the characteristic of coupling mutual induction, a four module components is proposed to decouple the network equation and analyze the fault modal network. On this basis, a novel method of fault pole identification based on the polarity comparison of line-mode back traveling wave is proposed. It has been made that validates the advantage of this novel protection strategy to identify the fault pole by simulation of PSCAD/EMTDC on the model of the TBL ±500kV HVDC system on the same tower in Xiluodu-Guangdong China.
Study on Nitrate-Impregnated Sulfur Dioxide Sorbent Derived from Sewage Sludge
Authors: Li Yi Li , Tian Jing , Liang Wen Jun , He Hong , Jin Yu Quan
Published: November 2011

Activated carbon derived from sewage sludge was impregnated in nitrate solution to produce a sorbent for sulfur dioxide adsorption at low concentration. The sulfur dioxide capacity was measured according to a laboratory-designed breakthrough test. After adsorption experiments on sulfur dioxide, desulfurizer JZ-Ni was chosen as the optimal sorbent owing to its largest sulfur dioxide capacity 57.6 mg•g-1 and the highest BET 210.3031 m2•g -1. The effects of a few conditions on SO2 removal behavior of the sorbent were studied. The results show that the sorbent JZ-Ni under the best conditions of 5714 mg•m-3 inlet SO2 concentration, 2000h-1 space velocity and 393K desulfurization temperature, 0.3 mm particle diameter in steam has the maximum breakthrough sulfur dioxide capacity 58.2 mg•g-1 .
Study on the Effect of Leaching as of Phosphogypsum on the Soil Environment
Authors: Ma Lin Zhuan , Wang Hua , Qing Shan , Ma Feng Li
Published: November 2011

Phosphogypsum is the gypsum as a byproduct. It caused serious environment pollution. In this study, leaching As of phosphogypsum was studied by leaching equipment of self-made. We get some results of As heavy metals of the phosphogypsum affect the soil. The results show that: the content of arsenic is increasing and the pH of the soil is gradually decreased with the increasing of the leaching time. Different leaching velocity will cause different the content of arsenic of the soil.
Spatial Structure of Danwei Compound towards Low-Carbon - Case Study of Space Change in HUST
Authors: Chen Jin Fu , Zhu Xiao Yu , Ren Li Juan
Published: November 2011

Urban transport activities have an important impact on carbon emissions. The traditional Danwei compound created a better structural condition, providing people with the way of low-carbon transportation. In this paper, we discussed the impact of HUST campus space change to the choice of transportation for the school staff, and proposed that the low-carbon urban block special structure should be encouraged in the urban planning in order to reduce carbon emissions through constructing the mixed function urban blocks.
Advanced Wastewater Treatment under Different Dissolved Oxygen Conditions in an Innovative Step-Feed Process
Authors: Yuan L M , Zhang C Y , Yan R , Zhao G Z , Tian L J , He Z X , Liu H , Zhang Y Q
Published: November 2011

An innovative step-feed Anaerobic-multiple Anoxic/Oxic-Membrane Bioreactor [An-M(A/O-MBR] process was developed to treat synthetic domestic wastewater. Performance of the lab-scale system was investigated at different dissolved oxygen (DO) concentration (0.4-2.4mg/L) in the aerobic tank of the multiple A/O zone. The results showed that, under the conditions imposed, the DO level has no obvious influence on COD removal and the removal efficiency was more than 94% throughout the operation. However, DO levels have great influence on nitrogen and phosphorus removal. Better nitrification performance(>99%) could be obtained when DO was in the range of 0.8~2.4mg/L. High total nitrogen (TN) and total phosphorus (TP) removal performance can be obtained when DO was in the range of 0.8~1.2mg/L, the average removal efficiency was 74.81% and 71.41%, respectively. In this condition, DO can meet the demand of nitrification and phosphorus uptake simultaneously, and the simultaneous nitrification and denitrification (SND) occurred in the aerobic tanks under 1ower DO concentration. Meanwhile, since the DO circulated from the aerobic tank to the anoxic tank decreased, denitrification was enhanced and the nitrate quantity in the sludge recycle system decreased, resulting in the decrease of carbon substrate competition between denitrifcation and phosphorus release in the anaerobic zone. Ultimately, the performance of TN and TP removal was enhanced.
Differential Absorbance Spectroscopy in Studying Natural Organic Matter Reactivity in Disinfection By-Products Formation: Comparison and Applicability
Authors: Liu Yan Fang , Wang Qi Shan , Yue Shang Chao , Li Si Si
Published: November 2011

This study compared the differential absorbance spectroscopy of the raw water oxidized with chlorine and chlorine dioxide to explore the reactions between oxidants and natural organic matter in disinfection by-products (DBPs) formation. The correlations between the differential absorbance at 272 nm (ΔA272) and 254 nm (ΔA254) and DBPs formation in chlorinated water were also examined, respectively. The intensity of the differential absorbance increased with increasing doses for both chlorine and chlorine dioxide. The sites in natural organic matter oxidized with chlorine and chlorine dioxidate are different. Unlike the well defined band at 272 nm and 254 nm in differential spectra of water oxidized with chlorine, a well defined band at 220 nm was found in water oxidized with chlorine dioxide. The behavior of -ΔA272 during chlorination process was determined to be strongly correlated with DBPs concentrations quantified by linear equations with R2 values > 0.95. A weak correlation (R2 value 254, indicating the formation of DBPs independent of destruction in UV-absorbing sites.
Investigation of Atmospheric Mercury Pollution in Guilin
Authors: Qian Jian Ping , Zhang Li , Chi Zhan Dong , Huang Chang Xu , Jiang Wen Ying , Chen Shan Shan
Published: November 2011

Atmospheric mercury in Guilin was monitored systematically, the content ranged from 7.69 to 39.93ng/m3. In general, from industrial areas to hospital areas, to commercial areas, to garden greenbelt, to residential areas, to culture and education regions, the average value of atmospheric mercury content decreased successively, it ranged from 22.89 to 9.94 ng/m3. The atmospheric mercury content was influenced by temperature, height, rainfall and circulation of air. The result of the investigation shows that the atmospheric mercury mainly comes from the emission of gaseous mercury of industrial production and special service sector, automobile exhaust, point sources of mercury pollution and transport of gaseous mercury from distance.
Land Use Patterns Effect on Soil Anti-Erodibility in Low Mountain-Hilly Region
Authors: He Shu Qin , Zheng Zi Cheng , Wang Ling
Published: November 2011

Land use patterns effect on soil anti-erodibility was studied by the combinative means of field investigation and laboratory analysis in low mountain-hilly region. The results showed that he five land use patterns had high proportion of aggregates at the size of >2 mm after dry sieving and had high proportion of aggregates at the size of <0.5 mm after wet sieving. Soil dispersion was mainly reflected in aggregate at the size of 0.05- 0.001 mm under different land use patterns. It was significantly different to land use patterns effect on soil anti-erodibility. Soil anti-erodibility in Chinese fir plantation and Eucalyptus plantation were stronger than those of tea plantation, loquat orchard and abandoned farmland. Water-stable aggregate stability was the highest in Chinese fir plantation, followed by eucalyptus plantations and tea plantations, and water-stable aggregate stability was the lowest in loquat orchards and abandoned farmland. Except for coarse dust, the other soil particle content of the same size had the different change under different land use patterns. The change of status of aggregate and degree of aggregation was opposite to the change of dispersive coefficient under different land use patterns. Water stability index and soil organic matter content in Chinese fir plantation, eucalyptus plantation and loquat orchard was higher than that of abandoned farmland and tea plantation. So, land use patterns of Chinese fir plantation and eucalyptus plantation was reasonable in study area.
An Estimation Approach Based on Predictive Filtering to Missile Guidance
Authors: Song Yuan Yun , Chen Wan Chun , Yin Xing Liang
Published: November 2011

An approach for estimation to states of missile guidance based on predictive filtering is derived for the measurement process with high and low frequency noise. Analyze the influence of various noises on miss distance. Comparing with the extended Kalman filter, the simulation results indicate that this new method is able to improve accuracy of the guidance system with less estimation error.
The Research on Effect Factors of the Polymer Flooding in Low Permeability Reservoir of Daqing Oilfield
Authors: Wang Yong Li , Li Tao , Fu Zhi Guo , Liu Shu Xia , Yu Bai Lin , Sun Shu Yan
Published: November 2011

The pilot block is a heterogeneous reservoir with low permeability which is only 100-200(mD). Polymer flooding will be used to enhance oil recovery (EOR). Therefore, some experiment will be carried out in this pilot block .According to the simulation results, we can infer the effect factors of the polymer flooding such as concentration, injection rate, slug amounts, and well pattern. It gives us effective information for the field development plan.
Interactions between E18 Rat Hippocampal Neurons and Au-Nanowire Arrays
Authors: Islam Asiful , Menon Latika
Published: November 2011

The anodization of aluminum templates created nanoporous alumina tubes arranged parallel to each other and electrodeposition using gold solution (AuHCl4) resulted in arrays of gold nanowires (GNWs) inside the pores. For investigation of Au-nano-neuronal interactions, we have cultured embryonic day 18 rat hippocampal neurons on the surface of nanowires. For preliminary understanding of the neuronal growth and connectivity, we studied the images of nano-neuronal interactions by using optical, fluorescence and scanning electron microscopy (SEM). For adhesion of neurons to nanoarrays surfaces, we used bioconjugating protein coating Poly-D-Lysine (PDL). The embryonic hippocampal tissues were dissociated mechanically and cultured on Au-nano templates. We demonstrated well-defined neuronal networks on Au-nanowire (GNW) arrays and on standard glass coverslips. The neurons attached with the nanowires surfaces by an interface of PDL, which is a positively charged poly-peptide and plays a vital role in neurites growth on the nanowire arrays. The pre- and post-synaptic affects of neuronal interactions on the surfaces of nanowires were measured by Ca+ imaging in Keck microscope.
Wellbore Stability Analysis of Coal Seam Based on Hoek-Brown Criterion
Authors: Yang Heng Lin , Tian Zhong Ian , Zhang Li Song , Yan Xiang Zhen
Published: November 2011

Stable evaluation of coal strength is needed in coal well-bore stability analysis. The regular analysis method of wellbore stability adopts Mohr-Coulomb strength criteria to judge the collapse pressure. Coal is dual porosity structure and contains joint fissures richly. Hoek-Brown criterion is much more reasonable to estimate the strength of jointed and fractured rock. So Hoek-Brown criterion is used to analyze the stability of multi-lateral horizontal coal bed methane well. Considering the GSI (geological strength index), structural and surface conditions of coal, the coal and rock mass strength parameters are converted into the underground coal mechanical parameters based on the triaxial test of intact coal. According to the stress state of multi-lateral horizontal well, the borehole collapse formulas are established based on Hoek-Brown Criterion. The effects on the wellbore stability, due to the joint fissures of coal, borehole size, drilling disturbance, are also discussed in this paper.
Design of Methane Polymerization Reactor Temperature Monitoring System
Authors: Sun Rong Xia , Kang Jian , Huang Pan Pan , Tian Yi , Chen Xiao Feng , Gao Lei
Published: November 2011

The designs to improve the problem such as large temperature fluctuations in polymerization reactor affect the quality of CH4. The slave computer MCU controls temperature sensor to detect temperature; the host computer PC monitors temperature of polymerization reactor, and draws a monitoring interface by Kingview. In order to control the temperature of polymerization reactor, the MCU uses Dahlin algorithm. Meanwhile, the system has real-time temperature displaying, recording, storing, alarming, serial communication and so on functions. Establishing the control system based on the PROTEUS simulation. Experiment shows that temperature is controlled at 200±3°C in the constant temperature phase, and it is superior to polymerization reactor required at 200±5°C.System Experiment Completely Meet the Requirement.
Finite Element Analysis on Stress and Strain of Nickel Electroless Plated Fiber Bragg Grating
Authors: Xie Jian Feng
Published: November 2011

After FBG was nickel electroless plated, the stresses and strains on the FBG and nickel eclectroless plated layer under varied temperature were analyzed in theory. In order to verify the theoretical analysis of stress and strain,a finite element analysis software(ANSYS) was used to simulate the stresses and strains on the FBG and nickel ececltroless plated layer. The results of theoretical analysis matches the ones form simulations well.
Research and Realization of Heating Furnace Temperature Control System Based on PIDNN
Authors: Tian Hong Xia , Jiang Pei Lei , Tian Li Xin
Published: November 2011

In view of the serious misalignment, the mathematical model's uncertainty, the characteristic of the system operating point changing fiercely of the heating furnace temperature control system, this paper designed a new type of intelligent control system - PID neural network system (PIDNN) which melt the PID control rule in the neural network. This system has the quick reasoning speed and the strong anti-interference ability.
The Formation Process of Transition Layer of Steel Wire Hot-Dipped Galfan by Sendzimir Process
Authors: Wu Jian Jun , Li Kai , Fan Yong Zhe
Published: November 2011

The formation process of Galfan alloy transition layer in Sendzimir process was studied by SEM and EDS method. The results showed that the thickness and aluminum content of transition layer increased with the increase of dipping time. Hypoeutectic structure of zinc appeared as the decrease of Al in Galfan coating. The Fe content decreased from the steel matrix to alloy layer.
Bioactive Coating on Stainless Steel 316 L through Sol-Gel Method
Authors: Jafari Sajjad , Taheri Mohammad Mahdi , Idris Jamaliah
Published: November 2011

In this work hydroxyapatite coating through Sol-Gel method on stainless steel 316 L was investigated. Biocompatible additives such as P2O5, Na2CO3, KH2PO4 and HA commercial powder were used for preparation of hydroxyapatite Sol-Gel. Corrosion behavior of the ground and passivated stainless steel was evaluated. Characterization of the coated samples was performed by using SEM and XRD. The results showed that by increasing the sintering temperature, a denser structure of hydroxyapatite was obtained, and volume fraction and size of porosities decreased. Thick hydroxyapatite coatings with a thickness range of 50-70 µm free from cracks were obtained.
Research on Conditions of Producing Cellulose by Mixed Fermentation for Bioethanol
Authors: Su Xiang Ping , Gong Da Chun , Li Xiao , Chen Guo Hua
Published: November 2011

The conditions for cellulase production were studied with the mixed germs of Aspergillus niger (A.niger) and Trichoderma viride (R.viride) using straw stalk powder as carbon recourse by solid-state fermentation (SSF). The conditions of the mixed strains SSF were optimized by single factor experiments and orthogonal experiments in four aspects: the inoculation ratio, the bran-straw mass ratio, fermentation time and the filled volume. The optimal SSF conditions of the mixed strains were as follows: inoculation ratio of R.viride to A.niger was 1, the bran-straw mass ratio was 0.3, the time of fermentation was four days and the filled volume is 100 mL /1000 mL. The enzyme activity of FPA, CMC and β-glucosidase are 5.29 IU/mL, 9.33 IU/mL and 49.91 IU/mL in the optimal cultivation condition, which were 2.28~2.47 times, 2.39~2.45 times, 1.38~2.09 times as high as single-germ fermentation, respectively. The enzyme activity of cellulose from the mixed fermentation was higher than that from the fermentation of single bacteria.
The Research on Dissolving Properties of Biodegradable Cellulose Pulp
Authors: Qian Cheng
Published: November 2011

For making Eco-Friendly cellulose sponge, cellulose pulp dissolving properties were researched in this paper. NaOH and NaOH/Urea solutions were both used, various factors (temperature, concentration and time) on viscosity of the pulp were studied. At first, ten different kinds of cellulose pulps were dissolved at low temperature in a certain range of concentration of NaOH solvent and the pulp with best soluble property was chosen. On the above basis, effects of the temperature of alkaline solvent and concentration on the viscosity of the selected pulp was fatherly experimented and analyzed. The result was got that at concentration of 8% of NaOH solution and at temperature of -5°C, the cellulose pulp has the best solubility. In the meantime, the solution has the biggest viscosity. On the other hand, NaOH/Urea solvent was tested for cellulose solubility. After experiment, the tests showed that when NaOH/Urea blending ratio is 8:12, the selected pulp solves completely and the solution was clear. Thus NaOH/Urea solvent has better solubility than that of NaOH solution for solving the cellulose pulp.
New Type of Distributed Biomass Combustion Device Necessity and Feasibility in China
Authors: Pang Chang Le , Chen Li , Dong Ren Jie
Published: November 2011

Worldwide changes in climate and environment forced us human beings to seek for alternatives to replace commercial energy products like coal and petroleum. However, there have some difficulties to promote commercial energy products in China’s rural areas and newly urbanized areas. Biomass combustion system will become one of the ideal devices for such areas in a period of time. It is necessary to develop new types of biomass combustion system consisting of gasification or Semi-Gasification and combustion units so that it can provide high efficiency and low cost for household purposes.
Marginal Adaptation of Cast Metallic Dental Crowns Using Microplasma Welding Procedures
Authors: Sandu Liliana , Porojan Sorin , Topală Florin
Published: November 2011

Modern welding proceedings can be a beneficial method for repairing marginal adaptation defects in fixed prostheses technology. The aim of the study was to conduct experimental investigations to determine the optimal microplasma welding parameters according to the defect type. Different Ni-Cr alloy cast metal restorations with marginal defects were selected and divided depending on the repair possibility. A microplasma welding device, Welder, was used and as filling material a specific Ni-Cr wire was chosen. The process parameters were determined for each case. Introducing the practice of welding in dental technology requires prior experiments to determine the process parameters for the individual processes and their reproducibility.
Faults Evaluation Method Based Fuzzy Theory in Distribution System
Authors: Wang Tian Shi
Published: November 2011

All the factors causing distribution system faults are analyzed for improving safety and reliability of power system. Comprehensive and scientific evaluation for distribution system faults are made by fuzzy comprehensive evaluation method and the ordering is done by their severities. This method is able to monitor the distribution system safety and reliability and give reference for distribution system condition-based maintenance, thus improve the ability of distribution system safe operation.
Parallel Best Neighborhood Matching Algorithm on PC Cluter Platform
Authors: Zhang Yan Yan , He Li Qiang
Published: November 2011

Best Neighborhood Matching (BNM) has been shown to be an effective technique to recover a broken image due to a failed network transmission. For high definition image, the time of recovering using BNM algorithm is relative too long and not suitable for real time processing. And the original BNM only targets at gray scale image, and not considers the color image case. In this paper, we extend the BNM algorithm to color image area and use PC clusters to parallelly recover the image and improve the processing speed dramatically. The experiment result from a four nodes cluster system shows that our parallel BNM implementation improves the processing speed up to 7.52 times without any obvious recover quality decrease.
A PSO Weighted Estimating the Mean Downstream Demand to Mitigate the Bullwhip Effect in a Supply Chain
Authors: Tseng Ling Tzu
Published: November 2011

Bullwhip Effect, Particle Swarm Optimization, Supply Chain, Demand Information Abstract. A deformation phenomenon occurring in business activity, called the bullwhip effect which comes from the demand information is not fully shared among the members of a supply chain, conducts the upstream manufacturer to excessively anticipate the demand capacity of the downstream retailer. The manufacturer improperly decides the amount of the products not only to raise the inventory cost on the way of poorly handling the actually downstream demand, but also to lose the chance of business deals due to its backordering. To cope with the bullwhip effect by taking into account the holding and backorder costs, an evolutionary method based on the Particle Swarm Optimization (PSO) algorithm to estimate the critical parameter, mean downstream demand, is proposed and computer validated in this paper such that the estimated inventory level could be close the really batch ordering of the manufacturer.
Adaptive Full State Hybrid Function Projective Lag Synchronization in Chaotic Continuous-Time System
Authors: Xi Hui Ling , Yu Si Min , Xi Hui Ling
Published: November 2011

Based on the Lyapunov stability theory, an adaptive full state hybrid function projective lag synchronization (FSHFPLS) scheme is investigated in chaotic continuous-time system, and a unified adaptive controller and parameters update law are designed for achieved the projective lag synchronization up to a desired scaling function. In addition, a scheme for secure communication is presented. Numerical simulations are performed to verify and illustrate the analytical results.
Canal Reach Deformation Monitoring Technology Based on Terrestrial LIDAR Scanning Technology
Authors: Liang Jun , Han Xian Quan , Hu Bo , Tan Yong
Published: November 2011

Canal reach soil of the south to north water transfer project has a certain expansibility. Concrete lining plates is puring on the soil. After about half a year of water immersion test, a certain plastic deformation has happened on the lining plates because of the expansion in the soil. In order to monitoring the whole lining plates deformation pre and post water immersion test, point clouds is collected by Terrestrial LIDAR and total station. After constructing of triangular mesh and endowing the specific color, the two group of mesh can be overlapping displayed. Deformation area can be found easily by color distortion on superposition chart. And then deformation tendency is concluded.
Research on the Digital Design and Manufacture Technology in the Manufacturing of Titanium Alloy Cranial Prosthesis
Authors: Pei Yong Sheng , Zhao Jian Hua , Wu Lei , Xie Juan Juan
Published: November 2011

It is a new design and manufacturing method which forming medical image data processing technology and multi-point forming technology for titanium alloy cranial prosthesis digital design and manufacturing. First, the head of the CT data of patients according to medical image segmentation approach to the skull and scalp, brain image segmentation boundaries, using registration method to segment the skull CT image registration, and application of 3D visualization technology in patients with skull reconstruction of the mathematical model. Then on this basis, the use of thin-plate spline interpolation in accordance with the health side of the skull surface extension of the transition to be a mathematical model of the skull prosthesis. Finally, the mathematical model of the skull prosthesis passed to the multi-point forming CAD / CAM software system, so that multi-point forming the basic body to adjust the upper and lower press out the skull prosthesis forming surface, and processing the required titanium alloy cranial prosthesis. The technical solution of the skull repair system prepared in the presence of low precision machining, production costs are high, long cycle and so on, while improving the prosthesis fit and the precision of the edge defects.
Design of Detection Device for Solar Photovoltaic Lighting System Charge-Discharge Performance
Authors: Wang Yong Qing , Huang Pan Pan , Sun Rong Xia
Published: November 2011

Based on virtual instrument technology the detection device of solar photovoltaic lighting system charge-discharge performance is designed, which can test eight parameters of solar cells power amp hours, battery charging amp hours, battery discharge amp hours, instantaneous power of solar cells power generation, instantaneous power of battery charge and discharge etc. The LabVIEW program controls data acquisition card, which realizes real-time data acquisition, display and storage etc. The parameters of the solar cells terminal voltage, the solar cells output current, the battery terminal voltage, the battery charge current and battery discharge current are tested. It contributes to the research of best match for solar cells and LED electrical properties, and provides technical parameters for battery reasonable using and battery life extended, and maximizes the performance of solar photovoltaic lighting system.
The Application of Classification and Regression Trees Algorithm in the Production Data of Mounter
Authors: Zhang Lu , Shang Yan Ling
Published: November 2011

With the rapid development of database technology and the explosive data growth, we urgently need a new smart technology to help us translate data into useful knowledge and information; so data mining generate. In this paper, We use the classification and regression trees algorithm to mine the data supplied by a factory and acquire some knowledge which can promote the efficiency of the production and reduce the cost. It proved that this method can improve production and reduce the cost efficiency.
Individual Pitch Regulation for Wind Turbine
Authors: Yao Xing Jia , Li Huan
Published: November 2011

In order to reduce the tilt moment and yaw moment caused by asymmetric wind, aerodynamic model for individual pitch control of large-scale wind turbines was established. Because the aerodynamic model have characteristics of multiple variables, strong coupling and time-varying, First, it was converted into a linear time-invariant and non-coupled model utilizing a coordinate transformation, and so the controller design was simplified. Finally, take wind shearing as a disturbance and designed two independent PID controllers, simulated a 1.5MW wind turbines. The results show that individual pitch control greatly reduced the moment and yaw moment of wind turbine.
Accurate Detecting Method for Fractional Harmonic
Authors: Wang Ping , Cheng Bao Hua , Zhang Zhi Bin
Published: November 2011

This paper introduces a Hopfield neural network theory to deduce the model of the detection of fractional harmonic. It also discusses the setting method of integral parameter. The simulation results show that the method has high precision and the dynamic characteristics of the system are relevant to the integral parameter.
Remote Video Monitoring and Controling System Based on Web Services
Authors: Lin Han , Lin Hong Ji
Published: November 2011

The capabilities of 3G network are steadily increasing and provide the great flexibility of remote mointor and surveillance while being mobile. We propose the use of Web services in our system in order to solve interoperability issues between the stationary mointor center and moving client. so that the remote monitoring and controling can be carrid out by using the video carema and infrared transceiver according to the user's instructions. To explore this paradigm and to gain an understanding of these issues, we have implemented a Smart Home System where the householders can can control the electrical appliances and have real-time view in their home by using their mobile phone.
The Research of MAC Protocol Based on Fire System for Wireless Sensor Networks
Authors: Wang Qing Hui , Ji Yong Huan , Guo Hong Yan
Published: November 2011

Energy efficiency is a critical issue for sensornetwork. In this paper, we propose an energy efficient context adaptive MAC protocol for wireless sensor networks. The existing approaches try to minimize energy consumption by controlling the duty cycle of transmission period. The New-MAC forecast energy according to the Markov chain, then adjusts the duty cycle through the energy size, then adjusts the duty cycle through the energy size. Computer simulation using NS2 reveals that the proposed protocol significantly reduces the energy consumption compared with the existing S-MAC.
Dynamic Modeling of Single-Wheeled Robot
Authors: Ruan Xiao Gang , Wang Qi Yuan
Published: November 2011

This paper presents a kind of single-wheeled robot (SWR, unicycle robot). Lagrange approach is used to formulate the dynamic model of the robot moving in 3 dimensions. The result of model simulation is consistent with the physical. The proposed dynamic model provides some theoretical basis for designing and controlling SWR.
Research and Development of a Test Platform for Synthetic Performance Parameters of Linear Motors
Authors: Luan Zhong Quan , Ji Hu Yan , Yang Qing Dong
Published: November 2011

Linear Motors have been used more and more widely in high precision and high-speed linear motion for CNC machine tools, but uniform testing standards and methods for linear motor performance have not been established in China. Based on the virtual instrument software platform by means of computer technology, research and development of the test platform for synthetic performance parameters of linear motors can realize the rapid and accurate measurement, automatic storage and processing of linear-motor output, currents, positions, temperatures and other performance parameters. , Meanwhile, the platform can also provide the technical direction for design or improvement of linear motors, and technically support the formulation of related standards. Experiments showed that the test platform for synthetic performance parameters of linear motors can achieve high precision and automatic measurement to meet the testing requirements for synthetic performance of linear motors.
The Analysis of Natural Characteristics of Pipeline Structure Systems Based on Frequency-Domain Transfer Matrix Method
Authors: Wu Xiao Di , Liu Gong Min , Chen Hao
Published: November 2011

A pipe structure model composed of straight pipe, bent pipe, concentrated mass and flexible support was established. The axial, lateral and circumferential vibration of this model were taken into account in the paper. Then it was realized to calculate the natural characteristic of this pipeline in computer by using MATLAB language to program a series of procedures based on frequency-domain transfer matrix method. The calculation results were compared with the ANSYS simulation results, which illustrated the upper accuracy of frequency-domain transfer matrix method in calculating natural characteristic problems of pipeline structure system. At last, The pipeline system was analyzed with experimental modal method．By comparing the experimental results and computational results, relatively lesser error showed that computational results were reliable and frequency-domain TMM was verified to be valuable for practical application.
The Position and Role of MES in the CSG Information System
Authors: Li Qing , Zeng Qing Jian
Published: November 2011

In this paper, the author conducts an analysis on the structure of China Shaogang (CSG) information system, and then makes an argumentation on the position and role of the manufacturing execution system (MES) in the CSG information system, and finally gives an introduction to the relationship between the MES and the enterprise resource planning (ERP) system and also puts forward the opportunities and challenges that the MES is faced with in the specific implementation process.
Hybrid Iterative Local Search Heuristic with a Multiple Criteria Approach for the Vehicle Routing Problem
Authors: Sobrino D. R. Delgado , Moravčik Oliver , Caganová D. , Kostal P.
Published: November 2011

This paper presents a Hybrid Iterative Local Search Heuristic and its framework, whose aim lies on helping to escape from local optima when a construction heuristic, for the VRP, has been trapped. The approach was mainly inspired by basic and modified versions of related successfully applied heuristics such as Variable Neighborhood Search (VNS) and Granular Local Search (GLS). Differently to a great deal of local search heuristics revised, which mainly consider a single decision criterion, multiple optimization criteria are considered all along the local search and a Multiple Criteria Threshold has been proposed allowing defining which arcs must be included in a candidate list to explore, this considerably reduces the search area and has a major incidence in the satisfaction of the clients. The proposal is enriched with a good literature review, taking into account some of the gaps and achievements of the states of the art and practice.
Total Productive Maintenance - Accelerating OEE in a Manufacturing Industry Leveraging Pervasive Technologies
Authors: Kalbande D. R. , Thampi G. T.
Published: November 2011

Total productive maintenance (TPM) is a people-intensive, preventive maintenance system for maximizing equipment effectiveness in the enterprise. The concept of TPM was originally suggested by Nakajima (1988) who proposed overall equipment effectiveness (OEE) as a metric for evaluating the progress of TPM, which is interpreted as the multiplication of availability, performance and quality. This paper aims to study and investigate the implementation of a TPM to improve the OEE in manufacturing enterprises. In today’s industrial scenario huge losses occur in the manufacturing shop floor. These losses are due to operators, maintenance personal, process, tooling problems and non-availability of components in time etc. The quality related waste are of significant importance as they matter the company in terms of time, material and the hard earned reputation of the company. There are also other invisible losses like operating the machines below the rated speed, start up loss, break down of the machines and bottle necks in process. Zero oriented concepts such as zero tolerance for losses, defects, break down and zero accidents are becoming a pre-requisite in the manufacturing and assembly industry. In this situation, a TPM is the answer to resolve the above said problems which helps in benefitting the growth prospects of any organization.
Research and Realization for the System of Coal Mine Ventilation System
Authors: Nie Xiao Yu , Li Zhi Xiang , Bai Lei , Weng Geng
Published: November 2011

Coal mining is an integrated trade which involves the geology, well ventilated, transportation, electricity and environmental protection and so on. The mining industry has labor intensity, bad work condition, many harm factors. Each kind of virulent noxious gas, coal dust, fire, electromechanical device are all immediate danger to operate personnel's safety and healthy. Well-balanced and suitable ventilation is the postulate to keep the health of underground worker and the safety of the production. We take air quantity of laneway as the research emphasis, considering the release of state regulations on coal min. We figure out the optimum area of air quantity via building the optimization programming model, and realize an actual case study to interpret the process of the probabilistic risk analysis (PRA) with statistic theory. We take the theory to the actual production. We establish a MIS base on the theory. In the process of establishing the system, we use the object-oriented analysis method and the B/S structure, take JAVA as the development kit, and realize the risk analysis system. Then the risk manager can take the corresponding monitoring measure.
Hybrid Method for Solving Flexible Open Shop Scheduling Problem with Simulated Annealing Algorithm and Multi-Agent Approach
Authors: Witkowski Tadeusz , Antczak Paweł , Antczak Arkadiusz
Published: November 2011

In this study we propose metaheuristic optimization algorithm, in which simulated annealing, multi agent approach with fuzzy logic are used. On the first level of solution search the multi agent approach is used, and on the second level – the simulated annealing. Two types of routing were considered: a serial and a parallel one. The multi-agent approach emphasizes flexibility rather than the optimality of solutions. On the other hand, search approaches such as simulated annealing, which focus more on the optimality of solutions.
Tackling Means for Balancing the Production Lines
Authors: Amariei Olga Ioana , Hamat Codruţa Oana , Coman Liviu , Fănică Cristian , Rudolf Cristian
Published: November 2011

Balancing a production line means to organize the activity of the human operators, to establish the production flux and designing the line, minimizing the idle time for the machines and the operators, through an optimal charge bestowed upon them. WinQSB software offers three methods of solving this type of problem, namely: heuristic techniques (a basic method is specified and an alternative one from all the available ones), Optimizing Best Bud Search and Computer Method of Sequencing Operations for Assembly Lines, presented all in the present paper.
Control of Crisis Environments by the Use of WSN Structures and Based on Expert-SOA Architecture
Authors: Ghadikolaie Zahra Oladi , Bazminabadi Sara Jafari , Kalantari Samira , Line Zahra Hadjian , Shamshirband Shahaboddin
Published: November 2011

In this article service-oriented architecture is implemented in crisis environments (such as in a place on fire). Our purpose is to use wireless sensor networks and multi-agent systems in crisis environments to gather information from the environment. This information is received by sensor nodes, it is then processed in the expert system, the deductions concerning the environment from which information has been gather are sent to the central controller, and then the central controller sends the messages to the human agent who becomes aware of the situation in the environment in order to carry out the prescribed duties.
An Analytical Approach to Ring Rolling Using Modified Slab Analysis
Authors: Parvizi Ali , Abrinia Karen , Hamedi Mohsen
Published: November 2011

In this paper, based on the modified slab method theory, an analytical solution for ring rolling process is presented. The non-uniformity of the normal and shear stresses across the section of the deforming material are considered. The friction factor multiplied by the shear yield strength is used to present friction between the main roll and the ring. Complete expressions for the ring rolling pressure, force and torque are obtained and the position of neutral point is predicted. The influence of the process parameters such as friction factor, main roll rotational speed, feed speed, and others was investigated. Analytical results obtained from the present formulation were compared to previous experimental works and good agreement and improvements were observed.
Multi-Objective Optimization Analysis of Motor Cooling System in Articulated Dump Truck
Authors: Zhang Yan , Shen Yan Hua , Zhang Wen Ming
Published: November 2011

In order to ensure the reliable and safe operation of the electric driving motor of the articulated dump truck, water cooling system is installed for each motor. For the best performance of the water cooling system, not only the heat transfer should be enhanced to maintain the motor in relatively low temperature, but also the pressure drop in the water cooling system should be reduced to save energy by reducing the power consumption of the pump. In this paper, the numerical simulation of the cooling progress is completed and the temperature and pressure field distribution are obtained. The multi-objective optimization model is established which involves the cooling system structure, temperature field distribution and pressure field distribution. To improve the computational efficiency, the surrogate model of the simulation about the cooling process is established based on the Response Surface Methodology (RSM). After the multi-objective optimization, the Pareto optimal set is obtained. The proper design point, which could make the average temperature and pressure drop of the cooling system relative desirable, is chosen from the Pareto optimal set.
The Design of Data Transmission for New Intelligent Layered Water Injection Regulating and Testing System
Authors: Wang Guo Rong , Zhao Min , Huang Chong Jun
Published: November 2011

This article mainly presents the method of carrying out Manchester’s coding, transmitting and surface decoding for the downhole data based on complex programming language device EPM1270T144I5 chip (CPLD). It also presents the main components of new intelligent layered water injection regulating and testing system, the overall scheme design on data transmission, and the software simulation in QuartusⅡ for ManchesterⅡ encoding as well decoding. The actual application shows that the technology features stable and reliable for data transmission and acceptance, thus it is greatly simplifying the system’s circuit, improving its whole performance.
Vibration Reducing Analysis of Beam String Structure with Seismic Isolation Bearings
Authors: Nie Yun Jing , Li Tie Ying
Published: November 2011

A vibration reducing system of seismic isolation bearings is introduced into beam string structures. The vibration control on seismic response of beam string structures (BSS) with seismic isolation bearings is discussed. Firstly finite element models for different analyses are established by using explicit dynamic analysis program LS-DYNA. Then the seismic response analyses are performed on a single beam string structure with and without seismic isolation bearings to investigate the effectiveness of the seismic isolation bearings in reducing vibration response of BSS. Furthermore, parametric analyses are conducted to examine the effects of lateral stiffness and damping of the seismic isolation bearings on seismic isolation. The analytical results indicate that the vibration reducing system can effectively reduce the vibration response of BSS against seismic force, and be applied in the vibration control of BSS.
Core Loss Calculation in Step Magnetic of High-Speed Motor Stator
Authors: Xia Jia Kuan , Wang Xing Jia , Zheng Jie , Zhang Hua
Published: November 2011

According to the reduction for efficiency of high-speed permanent magnet brushless DC motor (High-speed PM BLDC motor) by core loss of stator in the design process, the accurate calculation for stator core loss is very important.2-D finite element method is used to analyze the alternating magnetic field and magnetic field of the stator core of which a rotational speed of 27000rpm high-speed BLDC motor. Harmonic analysis is used for the step magnetic field of high-speed BLDC motor, Based on the model of Bertotti iron loss calculation, superposition of various frequency loss will be calculated, the calculation accuracy was validate to increase.