bluuebunny/crossref_metadata_2025 huggingface dataset:
Stability of Target Area Support System for SG-III Facility
Authors: Wang Mei Cong , Chen Gang , Xu Yuan Li , Wu Wen Kai , Zhu Ming Zhi , Wang Jun , Yu Shao Rong , Chen Xue Qian
Published: February 2012

In order to satisfy the requirement of optical system positioning in SG-III facility, the target area support system should provide a stable platform for optical elements. The target area support system includes a rectangular target area building, target chamber support structures and a switchyard steel frame. The vibrational stability of the target area support system will be achieved through a combination of structure design, large modal damping material, and friction dampers. Finite element analysis has been used to evaluate the target area support system. The rotation drifts of the transport mirrors, the translation drifts of the focal lenses, and the translation drift of the target are obtained. The orientation errors of each beam in target area system are less than 12.9μm based on the relation between the beam orientation error and optics elements drifts. And the safety factors are 1.44 to 2.3. The design of the target area support system has satisfied the stability requirements.
Optimum Design of Kitchen Garbage Truck Lifting Mechanism Based on Virtual Prototype
Authors: Wang Zhong Chang , Liu Da Wei , Jiang Rong Chao , Ge Xu Kun
Published: February 2012

The lifting mechanism’s mechanical system and hydraulic system were built by the mechanical system dynamics software ADAMS for improving the mechanism’s performance. The hydraulic-mechanical virtual prototype model was established by the integration of the two systems through parameter correlated technology under ADAMS environment. The locations of revolute joints were optimized with the minimum of the cylinder forces as the optimization goal, by using the OPTDES-GRG and the main design points were parameterized. The optimization results show that the maximal cylinder forces had reduced by 16.5% over the non-optimum one, while the lifting force has reduced by 15.7% in the work process of lifting mechanism.
Study on Meshing Characteristic and CAM Technology of Eccentric Involute Gears
Authors: Liu Yong Ping , Meng Peng Fei , Hu Chi Bing
Published: February 2012

According to the meshing principle of noncircular gears, the meshing characteristic and digital manufacturing technology of eccentric involute gears is studied. Based on analyzing the parameterized modeling of pitch curve, transmission characteristics and convex-concave property on eccentric involute gears, the transmission feasibility of this type gear is proved. Through tooth shape design, CAM calculation and processing simulation, the validity and manufacturability of theoretical design method on this type gear is proved. The research results can provide more systemic theory basis for the design, manufacture, measure and application of eccentric involute gears.
Simulation of Ride Comfort of Tracked Vehicle Based on Road Random Excitation
Authors: Liu Pi Jing , Hou Liang , Lin Wen Guang , Yu Xiu Yi , Huang Wei
Published: February 2012

By simplifying the triangular tracked engineer vehicle into dynamic model of half-tracked vehicle with five freedom degrees which includes four vertical jumps and one rotation, a corresponding dynamic differential equation is set up to each degree of freedom. A method of road roughness simulation, based on the time series of White Noise, is also represented and then verified. The simulation analysis of the tracked vehicle ride comfort is built on MATLAB/SIMULINK, based on the incentive signal of an imitated road. The simulation results show that the method that White Noise generated road roughness is applicable and prove efficient in the ride comfort research of the triangular tracked engineer vehicle. Thus a theoretical foundation is established for the optimization for ride comfort of the triangular tracked engineer vehicle.
Algorithm and Implementation Write by R Software for Estimating the Transition Matrix of Homogeneous Markov Chain in Reliability Predictions
Authors: Chen Chun Hui , Nie Ya Fei
Published: February 2012

Markov prediction is an important method predicts availability of repairable system. How to estimate the transition matrix and profit matrix (if it has) play a fundamental role in Markov prediction. This article introduced briefly homogeneous Markov chain prediction method, study on estimation and algorithm which calculate the transition matrix and profit matrix accompany with transition on the base of historical data about system state and profit. Finally, according to algorithm, we write a customized functions utilizing R software and provide the calling method more details. It did fundamental work on utilizing data about system failure and maintenance to estimate the rate of system failure and the effective degree of steady-state, which enrich the theory and technology of decision models for reliability-centered maintenance and system maintainability modeling.
Study on Cloud-Based Service Platform for Mass Customization
Authors: Che Jun Hua , Zeng Qian , Zhang Shu You
Published: February 2012

The core capabilities are to provide full product space for customers with the low cost and high efficiency in customized manufacturers, and ultimately to meet the individual demand of customers. This paper proposes cloud-based service platform for mass customization by the advantages of cloud computing, in order to effectively achieve the company's core capabilities and integration of resources and meet the supply and demand between the fluctuations in orders and the long-lasting manufacturing capabilities. This paper mainly studies the service platform architecture and the core technology to improve the service capacity of mass customization business through the integration of resources, demand integration and optimal configuration.
The Research of Coding and Anti-Interference Strategy Basing on Color Identification of Educating Electrical Informational Production
Authors: Xia Zhi Liang
Published: February 2012

This paper had a research on educating electrical informational production’s color convey information having problems in realistic apply. By means of distinguish educating electrical informational production’s color information’s ligthtness, purity and hue, putted up humanility engineering imago measure’s test evaluation on efficiency during user identify color contrasting, got the contrast mix color rule that color based mainly on lightness contrast. which provided design strategy for how to control developing educating electrical informational production’s color informational channel disturb.
Influence of Aggregate on Workability of Self-Compacting Concrete
Authors: Liu Huan Qiang , Chen Xi
Published: February 2012

The workability of self-compacting concrete is influenced greatly by aggregate. In this study, the effects of aggregate gradation, maximum particle size, sand percentage and particle shape on the workability of self-consolidating concrete were investigated. The results showed that the compressive strength and workability of self-compacting concrete were increased by increasing the particle size of aggregate, optimizing gradation, choosing proper sand percentage and increasing shape index in a certain range.
Analysis of Velocity Characteristics of Automobile Interior and Exterior Aerodynamic Noise
Authors: He Yin Zhi , Yang Zhi Gang
Published: February 2012

After a short introduction about aerodynamic noise generation mechanisms, frequency and velocity characteristics of interior and exterior aerodynamic noise for a production automobile under different wind speeds are investigated through 1:1 aeroacoustic wind tunnel tests. The results show that: Both for the interior and exterior aerodynamic noise, the frequency characteristics keep almost the same as wind speed goes up. The linear OASPL for the interior aerodynamic noise increases at about 4.5th power of wind speed, for the pseudo noise on the vehicle body surface at 4.1th power, for the exterior noise out-of-flow also at 4.1th power. However, the A-weighted OASPL for the interior aerodynamic noise increases at about 5.2th power of wind speed, for the exterior noise out-of-flow at 6.0th power.
Study on Enhancing Recovery Factor of Binary Compound Flooding Using Surface-Active Polymer as Pre-Slug
Authors: Li Wei , Kou Hui Hui , Xiao Han Min , Sun Ling Hui , Li Zhen Feng
Published: February 2012

This article studied the recovery factor of binary compound flooding using surface-active polymer as pre-slug respectively based on the homogeneous sand paced pipe model and on the two dimensional positive rhythm inhomogeneous physical models. According to experiment on homogeneous model, while pre-slug is 0.2PV, the recovery ratio of binary compound flooding using surface-active polymer as pre-slug increases 4.03%, additionally, the pressure increases because of emulsification of surface-active polymer, so surface-active polymer has high oil sweep efficiency; According to experiment on inhomogeneous physical models, because of strong ability of emulsification, plugging and profile control, the recovery ratio of binary compound flooding using surface-active polymer as pre-slug increases 4.82%.
Design of Suspension Vibration Control System Based on ON-OFF Algorithm
Authors: Yue Jie , Zhang Jin Qiu , Gao Yong Qiang , Peng Zhi Zhao , Shi Zhi Tao
Published: February 2012

Aimed to satisfy damping force change requirement of vehicle MRF suspension vibration control system, a controller of MRF suspension system based on On-Off control algorithm is designed, and a control system is carried out. The system takes single chip AT90CAN128 which obey the CAN bus protocols as micro-controller, and it accomplish AD conversion of sensor signal, design of On-Off algorithm and output of PWM voltage power control signal. The system also is used in vibration control experiment of tracklayer vehicle suspension system. The experiment shows that the controller can improve control accuracy, and the control effect is obviously.
Based on Genetic Algorithm for Wireless Sensor Network Node Self-Localization
Authors: Zhang Hua
Published: February 2012

Wireless sensor network node positioning technology is one of the key technologies. Due to self-localization of sensor nodes in the process of positioning accuracy is not high, In this paper， the genetic algorithm approach to take, through the evolution of control, making the location of the nodes for continuous progress toward the optimal solution, in order to achieve continuous process of node positioning optimization. Simulation results show that the evolution of the genetic algorithm control, can reduce errors, improve positioning accuracy.
The Stability Evaluation of Radial Ring Rolling
Authors: Hao Yong Xing , Han Ya Mei , Cheng Hai Tao , Guo Hua Ying
Published: February 2012

In the Non-stability radial ring rolling process, the ring may collide with the guide roll, making the ring become a polygon. In extreme cases the rolling process could be terminated and the ring be scrapped. The stability evaluation of radial ring rolling has great theory and practice significance. In this article, based on the kinematics theory, a classified research on the dynamic phenomenon of radial ring rolling was done, and a stability evaluation method during the radial ring rolling was put forward. The evaluation provided a good base for the future ring rolling dynamic research.
Implementation of Indoor Wireless Positioning System in an Omni-Wheel Robot Based on Gyroscope
Authors: Sheu Jia Shing , Wang Yi Shiang , Huang Tsong Liang
Published: February 2012

The aims of this paper realize an indoor location system on the navigation of the self-made omni-wheel robot, and use gyroscope to overcome the path deviation problem of travelling omni-wheel robot to make the moving path more accurate. This system includes two parts, the indoor location system algorithm and the control of omni-wheel robot. The gyroscope is adapted to detect the angular speed of vehicle in moving which causes by the external influence factor, using it to control the Omni-wheel robot moving in real time. At the same time, angular velocity integral is the offset from the direction and angle of deflection to control the robot. The result of the experiment using the embedded system-ARM7 is verified. The moving behavior of Omni-wheel robot can be corrected by the gyroscope that occur when vehicles go head deflection problem. The high accuracy positioning information is provided by the indoor wireless positioning system. It also reaches a large flexibility in the space in which automatic guidance within an acceptable range and the required accuracy of losing the position. In this research, one kind of efficient location system by using gyroscope to help the navigation of Omni-wheel robot is realized. And, this structure can make the moving path of Omni-wheel robot to achieve more accurately.
The Research on Friction and Wear Properties of Silicon Carbide and Silicon Nitride
Authors: Yan Fu Gang , Yan Shuai , Liu Feng , Lin Bin
Published: February 2012

Taking into account the condition that dry friction may occur when Si3N4 and SiC are self-made into friction pair, experiments are carried out to contrast the friction and wear properties under the condition of dry friction. In this experiment SiC friction pair presents better friction and wear properties, whose ultimate bearing capacity is better than Si3N4.
Control and Simulation on Vertical Vibration of Subway Rail via Magnetorheological Isolators
Authors: Li Rui , He Li Min , Li Xue Qin , Chen Ke Long
Published: February 2012

A semi-active vibration system via magnetorheological (MR) isolators can contribute to enhance isolation performance. In this study, a vertical vibration model of subway rail via MR isolators was proposed. The adjustable damping and stiffness characteristics of isolator were also analyzed. Based on a floating slab track (FST) isolation model, a variable domain fuzzy control system was proposed to decrease the vertical vibration force. The results simulated in MATLAB indicate that compared with passive isolators, FST system via MR isolators decease vertical vibration force transmissibility ratio to 40% at low frequency (15Hz) and to 31% at medium frequency (30Hz).
Preparation and Low Frequency Sound Absorption Properties of Silicate Composite Material
Authors: Peng Long Gui , Zhang Guang Cheng , Yu Xing Guo , Li Ying
Published: February 2012

The silicate based low frequency sound absorption composite material was prepared with powdery polymethacrylimide (PMI) foam as filler. The effects of the amounts of PMI and pore-forming agent, and water-cement ratio on sound absorption properties of composite material were researched. Sound absorption coefficient was characterized by standing wave tube, and micro structure of composite material was analyzed by scanning electron microscope. The results show that: when the amounts of PMI and pore-forming agent are 2.5wt% and 0.04wt%, respectively, and water cement ratio is 0.55, the average value of the absorption coefficient on the sound （≤1000Hz）can up to 0.35. Resonating sound absorption structure formed by micro pore of the silicate and thin wall cavity of PMI in composite materials is beneficial to high efficiency absorption to low frequency sound.
Experimental Study on Sticking Behavior of Fluidized Bed in Reduction Process
Authors: Wang Xing Juan , Liu Ran , Fang Jue
Published: February 2012

It is a good way that the fluidized bed is used as a substitute for reduction shaft in Corex process. Which can reduce energy consumption, environmental pollution and construction costs further, and also improve the competitiveness of Corex and blast furnace. At present, the sticking problem is present in iron ore reduction process and interrupts the reduction process, it has become a major obstacle on the development of fluidized bed. In this paper, a visualization hot model of fluidized bed is introduced. The influence factors on sticking behavior were analyzed from reduction temperature, gas velocity, atmosphere, degree of metallization or reduction and property of iron ore, the research provided a strong theoretical basis for controlling the sticking.
The Cultivation of Methylobactreium rhodesianum H13 for Dichloromethane Degradation
Authors: Zhu Run Ye , Liu Hong Xia , Chen Dong Zhi , Chen Jian Meng , Sun Zhe Ning
Published: February 2012

Dichloromethane (DCM) is a toxic pollutant with prolonged persistence in air and water. The work focused on the cultivation of Methylobacterium rhodesiaum H13 which could utilize DCM as the sole carbon source. By comparison and analysis, R2A was chosen as the suitable culture medium for large-scale cultivation. Furthermore, the optimized composition of medium was established on the basis of biomass obtained and the DCM degradation activity of M. rhodesiaum H13, which contained yeast extract 1.5 g/L, peptone 1.5 g/L, glucose 1.5 g/L, sodium pyruvate 0.9 g/L, K2HPO4 0.9 g/L and MgSO4•H2O 0.15 g/L.
The Noise Analysis of Turbocharger Compressor Flow Filed which Based on the Fluent
Authors: Jiang Guo He , Chen Xiang
Published: February 2012

This paper used the solid modeling software to establish the turbocharger compressor internal flow model and the compressor flow field grid model. It simulated the turbocharger compressor assembly three-dimensional viscosity steady flow characteristics in use of FLUENT6.3, and analyzed the internal flow field of the compressor under different working conditions. Then on the basis of that, proceeded the noise analysis of the turbocharger compressor, which provides theory basis for the design of turbocharger compressor noise reduction.
Effect of a Novel Low-Voltage Alternating Current Pulse on Solidification Structure of Al-7Si-0.52Mg Alloy
Authors: Zhang Li Min , Zhang Rong , Chen Wen Jing , Wu Yue Wei , Li Ning
Published: February 2012

The solidification structure applying a novel low-voltage alternating current pulse (ACP) during solidification of Al-7Si-0.52Mg alloy has been investigated. The results indicated that the grain density increased with increasing current density. A remarkable refinement of grain occurred, and the microstructure of primary α-Al phase transforms from developed dendrites to fine rosette equiaxed grain when the current density was more than 230 Acm-2. The grain refinement was mainly achieved during the nucleation stage rather than the stage of liquid inoculation and dendrite growth. It was concluded that the grain refinement under ACP during nucleation stage was due to the enhancement of nucleation rate induced by an additional electric potential energy.
Effect of Thermal-Cold Cycling on Properties of Glass Fiber/ Epoxy Resin Composite for Wind Turbin Blade
Authors: Tang Xian He , Lu Min , Feng Xue Bin , Liu Kui
Published: February 2012

The weight loss rate, FTIR characteristic, static mechanical properties and dynamic mechanical properties of neat epoxy resin and glass fiber/ epoxy resin laminates (GF/EP) after thermal-cold cycling were studied in this paper. The rule of static tensile and flexural strength of neat epoxy resin and GF/EP after ageing was investigated through the static mechanical properties analysis. The ageing mechanism of GF/EP was studied by analyzing the storage modulus (E′), loss modulus (E"), loss factor of GF/EP and FITR of epoxy resin. The results show that the weight loss rate increases with the ageing time，which is up to 9% after 400 times ageing cycle. The strength and flexural strength of GF/EP decreased by 6% and 21% after ageing, while the tensile strength of neat epoxy resin increases by 8% and its flexural strength increases slightly after ageing. The mechanism analysis reveals that internal defects of GF/EP would be induced by thermal-cold cycling stress, which results in the interface bonding strength dropping and the performance reducing.
The Study on Microstructures and Mechanical Properties of Heat Rolled and Solution-Treated Fe-26Mn-6Al-1C Steel
Authors: Huang Ming Li , Li Hua Ying , Ding Hua
Published: February 2012

In the present work, mechanical properties and microstructures of hot-rolled and solution-treated Fe-26Mn-6Al-1C steel (6Al steel) were investigated. Tensile tests were carried out at room temperature. The samples were characterized by using XRD, OM, SEM and TEM. The results suggested that the microstructure of the hot rolled 6Al steel was fully austenitic. After solution treatment and deformation, the microstructure was still single austenite. With the increase of the solution treatment temperatures, the strength decreased and the elongation increased. After solution treated at 1100°C for 1h, the yield strength, ultimate tensile strength and elongation were 378MPa, 756MPa and 57%.
Dynamics Simulation of Automatic Rifle
Authors: Lu Shan , Wang Bao Hua , Qi Ya Ping
Published: February 2012

By using dynamic simulation method, the launching technique of high firing rate for automatic rifle was studied. The influence of structure parameters of airway device, the stiffness of buffer spring and return spring on firing rate was studied. The simulation results provide the reference for the designing of high firing rate automatic rifle.
Fabric Defect Detection Scheme Based on Gabor Filter and PCA
Authors: Ding Shu Min , Li Chun Lei , Liu Zhou Feng
Published: February 2012

Gabor feature is one of the features which have been used for texture classification. In this paper, we propose a novel fabric detect detection scheme based on Gabor filter and PCA. The fabric image is split into image blocks, and then different Gabor filter banks are applied into each image blocks. A feature vector is generated by concatenating all the Gabor features with different directions and scales for each image block. Principal component analysis (PCA) is adopted to reduce the dimension of the Gabor feature vector. In the end, SVM can classify each image block as non-defective and defective. Experimental results demonstrate the efficiency of our proposed algorithm. Because of its simplicity, online implementation is possible as well.
Research on Hot-Work Die Steel Used for Extrusion Wheel
Authors: Wang Sheng Feng , Liu Hong Yu , Zhou Peng
Published: February 2012

A set of new nitrogen-containing hot work die steels were designed. The best experimental steels and their heat treatment processes were optimized by microstructures, mechanical properties and thermal fatigue tests. The results show that the best compositions of V, Cr, N are 1.0 wt％, 3.75 wt％ and 0.01 wt％, respectively. The optimized heat treatment process is that quenching at 1080°C, first tempering at 550°C and second tempering at 530°C.
Numerical Simulation of Hydraulic Fracture Propagation Characteristics of Low Permeable Coal-Rock Mass
Authors: Yuan Zhi Gang , Wang Hong Tu , Liu Nian Ping
Published: February 2012

Based on the coal-rock mass deformation model, hydraulic pressure descent model in fracture, fracture propagation model and its growth criterion, the mathematical model of hydraulic fracturing of low permeable coal-rock mass is established, and the influencing factors such as injection pressure, elastic modulus of coal-rock mass and in-situ stress, which affect the characteristics of hydraulic fracture propagation, are studied using the ANSYS software. The results show that fracture length presents a linear increase and widest width increases as an exponent function with the increase of injection pressure, and the ability of making fracture width is greater than fracture length during late fracturing; besides, with the increase of Young’s modulus of coal-rock mass and least horizontal stress, fracture length and widest width decrease, which are independent of maximum horizontal stress. The obtained conclusions provide a guiding role for the optimization of operation parameters of field hydraulic fracturing of low permeable coal-rock.
The Study on the Digital Simulation Technology of Toroidal Worm
Authors: Wen Qing Ming , Zhou Liang Yong , Li Zhi Guo
Published: February 2012

The technology of the stimulation of the toroidal worm is discussed in detail in this paper. In this paper, the technical scheme of the digital stimulation of the toroidal worm is established; the stimulating mathematical model is built. The digital stimulation and the contrast experiment of the toroidal worm are introduced, too.
Research on Properties of AlN-Mo Composite Ceramic
Authors: Kang Jie , Dong Gui Xia , Liu Qiu Xiang
Published: February 2012

With CaF2 and CaCO3 as sintering additives, AlN-Mo composite was prepared using hot pressed sintering technique. The phase composition and morphology of AlN-Mo composite ceramics were analyzed using XRD and SEM, respectively. The experimental results show that when CaF2 and CaCO3 additives is in a range of 1~3wt%, the thermal conductivity AlN-Mo composites increases with increasing of the CaF2 content; With the increasing of CaCO3 content, first increases and then decreases. Sintering additives in a certain type and content, the thermal conductivity of AlN-Mo composite ceramics with 20 vol% Mo is higher than containing 18 vol% Mo. The dielectrical property of AlN-Mo composite ceramics was also discussed. The addition of CaF2 can decrease the dielectric constant of AlN-Mo composite ceramics.
A Measuring Method of Circular Run-Out in any Direction of Valve Seat Related to the Centerline of the Valve Guide
Authors: Piao Wei Ying , Yuan Yi Bao , Sun Tao , Wang Lei
Published: February 2012

The difficulty of measuring the run-out of engine valve seat related to the centerline of the valve guide is the determination of the datum axis. A method that the gauge was fixed on the conical surface of the valve seat was chosen. One sensor on the conical surface of the gauge measures the run-out of the valve seat related to the centerline of the gauge. Another two sensors of the gauge measures the centerline of the valve guide. The mathematic model of measurement is established, the run-out of the valve seat related to the centerline of the valve guide can be archived.
Unmanned Monitoring System of Three Gorges Basin for Water Environment Based on WSN
Authors: Wang Jing , Wu Qian
Published: February 2012

Aimed at the puzzle of being difficult to actualize the monitoring of water quality resulted from massive land and complex terrain in three gorges basin of Changjiang River, In order to make monitoring of the water quality get more flexible, faster, easier and accurate, the paper designed a sort of monitoring system of three gorges basin in water environment based on WSN. In the paper, it researched the system architecture, analyzed the network design of system, built the wireless mesh network, designed the data acquisition monitoring module, and discussed the monitor center and software design. It took the parameter test of temperature, pH value and heavy metal irons etc in the river as an example, the data accepted by monitor center displayed that it could accurately reflect the actual field situation. The experiment result shows that the design of unmanned remote monitoring system is feasible and reasonable.
Study on the Asymmetric Sharp Feature Construct Method in Combined Subdivision Surface
Authors: He Gang , Zhu Deng Lin , He Gang , Pan Zheng Yu
Published: February 2012

Compound curve network is built to defined asymmetric sharp features in combined subdivision surface. The basic idea is to make the construction of sharp features separate from the definition of global surface and build compound curve networks consisting of base curve network and feature curve network. The curve’s subdivision rules and correct operator applying on common vertexes directly connected with curve vertexes are redefined to generate asymmetric sharp feature, and subdivision times is selected as sharp feature factor to control the sharp degree of features. When different sharp feature factors are defined at the two sides of interpolated curves, asymmetric features are generated on them. Curves of base curve network and curves of feature curve network take part in the subdivision of the interpolated surface in turn. Examples show that our method is effective and can get high quality interpolated surface.
Fuel Consumption Instrument for Diesel Locomotive Test Based on Siphon Principle
Authors: Cun Li Gang , Zhang Bao Xia , Zhang Hai Ming , Miao Zhong Cui , An Yong Xiang
Published: February 2012

The design of a fuel consumption instrument for diesel locomotive including its working principle, hardware and software is presented in this paper. As one of constituent parts of overall performance test system for DF series diesel locomotive, it is applied to measure the fuel level in the tank of diesel locomotive based on Siphon Principle, collect and process data, output or store the fuel consumption in the overall performance test.
Observable State Space Realization of Networked MIMO System for a Novel Virtual Observer-Based Delay Compensation
Authors: Meng Xiang Yin , Xiao Shi De , Huang Hui Ping
Published: February 2012

With the ever increasing complexity of cyber-physical system, the coupling and interconnection between distributed nodes lead to a complicated description in mathematics. For example, time delays cannot be ignored in the cyber-physical system modeling. And delay compensation often requires the delayed Multi-Input-Multi-Output (MIMO) system to be presented in state space model and all time delays to be combined to sole side of input or output. The aim of this paper is to model the MIMO system with multiple delays in state space form and simultaneously combine both input and output delays into output channel only. In this paper, following up with the modeling of Networked MIMO System, an observable state-space realization of delayed transfer function matrix is developed, including the case with repeated poles. Meanwhile, multiple time delays are combined and allocated to the output side only. Based on the observable state space model, an observer can be designed and contributed to the delay compensation. Derivation and simulation results prove that the resulting model of Networked Control System (NCS) through the proposed modeling method is equivalent with the original networked MIMO system with both input and output delays in terms of input-output relationship, and thus it can be used in the prospective observer-based delay.
Design and Optimization of Rotating Mechanism for Wind Load Test-Bed of Aerodynamic Brake
Authors: Wu Meng Ling , Zhang Xiang Jun , Tian Chun , Xi Ying
Published: February 2012

To adjust the angle between braking panel of aerodynamic brake and the wind direction, the duct and the direction of the wind are fixed, and the panel is rotated horizontally. So a rotating mechanism should be designed out to make the aerodynamic braking equipment rotate horizontally. This paper emphatically completes the design of rotating control system. The rotating direction is controlled by two bevel gears; magnetic powder clutch is used to simplify the organization, optimize the control mechanism, and let electric signal control the movement of clutch directly; the rotary supporting mechanism is consist of slewing bear which have two functions, supporting and rotating, and this mechanism is more compact and stable. In a word, this mechanism realizes horizontal rotating of the test-bed. And it lays the foundation of experiments about aerodynamic braking system.
Kinematic Characteristics and Optimization Analysis of Elliptical Geared Hoeken Mechanism
Authors: Huang Zhi Dong , Du Yun Pu , Zhang Zhao Gang
Published: February 2012

Kinematic characteristics of Hoeken mechanism is analyzed. Variable ratio transmission characteristics of elliptical gear is obtained. Elliptical geared Hoeken mechanism is presented. Kinematic characteristics of elliptical geared Hoeken mechanism is clarified. Eccentricity is optimized. The elliptical geared Hoeken mechanism with approximate uniform rectilinear motion is designed. The methods in this paper facilitate the innovation design of the mechanism with approximate uniform rectilinear motion.
Integrated Drilling Engineering Design System Based on Web Services
Authors: Liu Zhi Kun , Li Qi , Liu Hong Shan , Wen Liang
Published: February 2012

Direct towards the current research status of domestic drilling design, according to the characteristics of distributed, cross-platform and openness in Web Services, It is proposed to build a integrated drilling engineering design system included design basis, data support, drilling engineering design, cementing design, drilling fluid design and management of design result under the network environment using Web Services technology. The system would accomplished using Oracle9i and VS2008, so that it would become a reality that more drilling engineering staff or design staff distributed in different parts in a unified software platform for collaborative design.
A New Method in Improving RAFT Polymerization Rate of Styrene
Authors: Yu Qing Bo , Li Xian Hua
Published: February 2012

A batch reversible addition-fragmentation chain transfer (RAFT) polymerization of styrene was investigated. The results show that the process has good characteristics of living free radical polymerization. The polymerization rate is higher comparing continuous polymerization.
Preparation of the Amphiphilic Copolymer of Poly(ethyleneoxid-co-glycidol)-Graft-Poly(lactide) and their Extraction for Dyes
Authors: Zhao Xin , Sui Kun Yan , Liang Hong Chao , Li Yu Jin , Zhang Yang , Xia Yan Zhi
Published: February 2012

A well-defined graft copolymer poly(ethylene oxide-co-glycidol)-graft-Poly(lactide) [poly(EO-co-Gly)-g-PLA] of poly(ethylene oxide-co-glycidol) [(poly(EO-co-Gly)] as main chain and poly(lactide) (PLA) as the side chain was successfully prepared via combination of anionic polymerization and ring-opening polymerization. The glycidol was protected by ethyl vinyl ether first to form 2, 3-epoxypropyl-1-ethoxyethyl ether (EPEE), and then copolymerized with EO by initiation with the mixture of diphenylmethylpotassium and triethylene glycol to obtain the well-defined poly(EO-co-EPEE). The latter was hydrolyzed in the acidic conditions and then coordination-insertion ring-opening polymerization of lactide(LA) with poly(EO-co-Gly) was completed. The object products and intermediates were characterized by 1HNMR, MALDI-TOF-MS and GPC in detail. The experimental results confirmed that poly(EO-co-Gly)-g-PLA showed strong conjugation ability with the dyes.
Manufacture of Lasers with Multiple Operating Modes
Authors: Zhu Chang Jun , Xue Bing , Zhai Xue Jun , He Jun Fang
Published: February 2012

A two-beam pumped Ti:sapphire laser with femtosecond and picosecond cavities was manufactured. Three operating modes, independent self mode-locking, cross mode-locking and multi-pulse operating, were achieved. In the independent self mode-locking mode, femtosecond and picosecond laser pulses were generated in the two cavities, respectively. In the cross mode-locking mode, synchronized femtosecond and picosecond laser pulses were obtained in the two cavities. In the multi-pulse mode, multi-pulses were produced in the picosecond cavity. The results show that, the independent self mode-locking mode is dominated mainly by group velocity dispersion and self-phase modulation, the cross mode-locking mode is governed primarily by cross-phase modulation and the multi-pulse operating is ruled largely by self-amplitude modulation.
Evaluation of Seven Ductile Fracture Criteria for Failure Prediction of AZ31 Sheet in Warm Forming
Authors: Liu Jian Guang , Liu Wei
Published: February 2012

Seven commonly used ductile fracture criteria are briefly reviewed and the validity of predicting the failure of AZ31 Mg alloy sheet by using these ductile fracture criteria is evaluated. Through fitting the experimental FLCs, the damage parameters for these ductile fracture criteria are determined firstly. Integrating these seven ductile fracture criteria into Abaqus/Explicit via VUMAT subroutine, the warm deep drawing process of AZ31 Mg alloy sheet is simulated. The limit drawing ratios (LDR) of AZ31 Mg alloy sheet at different temperature are predicted. The comparison of predictions with the experimental results has shown that the combination of the finite element simulation and the ductile fracture criterion is useful for predicting the fracture occurred in warm deepdrawing of AZ31 Mg alloy sheet.
Preparation and Mechanical Properties of Lignin/Epoxy Resin Composites
Authors: Yin Quan Fu , Di Ming Wei
Published: February 2012

Lignin/epoxy resin composites were prepared by blending lignin with epoxy resin cured by polyamide. The effect of the content of lignin and polyamide on the mechanical properties of the lignin/epoxy resin composites was studied systemically. And the structure for the blend of lignin and epoxy resin without the curing agent was characterized by Fourier transform infrared spectroscopy (FTIR). The results of mechanical properties test showed that the bending strength of the composites decreases gradually with increasing the content of lignin, while the impact strength increased firstly and then decreased. The bending strength of lignin/epoxy resin composites showed a trend of increasing firstly and then decreasing with the increase of the content of polyamide, while the impact strength exhibited an opposite trend. The density for the composites increased with the addition of lignin, and polyamide exhibited an inconspicuous effect on density of the composites. The FTIR analysis results showed that the epoxy resin could be cured by lignin without polyamide, which concluded that the lignin could catalyze the cross-linking of epoxy resin or react with epoxy resin, and this bonding effect would beneficial to the properties of lignin/epoxy resin composites.
Study and Design of Image Pre-Processing System Based on FPGA
Authors: Li Jin Tong , Duan Xiao Jie
Published: February 2012

The high speed of image processing is required in the real-time image processing system. To improve the image processing speed, it is mainly implemented by hardware. This thesis constructs an image preprocessing system based on FPGA. Several typical image preprocessing algorithms, such as fast median filter, mean filter, Gaussian filter, Laplacian and Sobel operator edge filters, are implemented in the system. In the process of the system design, the characteristics and requirements of the image-processing implemented by hardware are fully considered. The parallel attribute insiding the image algorithm is effectively dug and the pipeline structure is adopt. All mentioned above are useful to optimize and improve the algorithms, reduce the hardware consumption and raise speed of image processing.
Internal Model Control Based on Interval Arithmetic for Suspension Systems
Authors: Liu Hao , Su Yong Qing , Wang Yan Ming , Yue Ji Guang , Luo Shi Hui
Published: February 2012

This paper deals with the application of interval arithmetic in internal model control (IMC) for suspension systems. The IMC problem is expressed as an optimization of filter parameters. And the optimization can be solved by branch-and-bound scheme with interval arithmetic techniques. We present the algorithm for the model of suspension systems. The effectiveness of the algorithm is demonstrated through simulation results.
Study on the Balancing Analysis of Assembling Line for a Type of Server
Authors: Yao Wei Xin
Published: February 2012

This paper analyzed practical problems of a type of svrver assembling line according to the principle of line balancing. Some unreasonable arrangements of activities and workstations are improved by using some ways of industrial engineering, such as 5W1H question technology and ECRS analytical method. The result indicates that the balance-rate of assembling line is greatly improved.
Complicated Event Query Processing Algorithms in Wireless Sensor Networks
Authors: Li Gui Lin , Gao Xing , Liao Ming Hong
Published: February 2012

In this paper, we propose two bloom ﬁlter based algorithms to solve the complicated event query adopting the separate DCS scheme. By using bloom ﬁlter, the communication cost involved in the procedure of query processing can be reduced. Experimental results show that our bloom ﬁlter based complicated event query processing algorithms achieve signiﬁcant performance improvement in terms of energy consumption.
Research on a Method of Cutting Tool Angle Conversion
Authors: Wang Yun , Cong Juan , Jing Hong Peng , Ning Xiao Xia
Published: February 2012

This paper explores a method of conversing the cutting tool angle between the different reference systems, and this method is based on geometric method. A variety of different type of cutting tools can be induced to a simple module through this method. The paper obtains the general angle calculation formulas.
Forming Limit of Magnesium Alloy Sheet in Hydromechanical Deep Drawing
Authors: Mao Xian Chang , Wang Ming Guang
Published: February 2012

The experimental research on the hydromechanical deep drawing of AZ31B magnesium alloy sheet was conducted in this paper. The deformation behaviors and the influence of internal pressure on its formability are investigated, moreover, the fracture behaviors of the obtained workpieces are discussed. The experimental results show that the formability of AZ31B magnesium alloy sheet in hydromechanical deep drawing is poorer than that in mechanical deep drawing at room temperature because the internal pressure fails to work effectively due to the weak plastic deformation capacity and the premature fracture of the kind alloy.
Intermittent Microwave Drying of Litchi: Drying Kinetics and Quality Formation in Color Difference
Authors: Xu Feng Ying , Chen Zhen , Li Chang You , Liao Jian Yuan , Zhang Han , Chen Chao Xin
Published: February 2012

In order to reveal the characteristics of thermal transmission and drying quality on the litchi’s multilayer structure, the peel and flesh that separated from fresh fruit were dried with the whole fruit by microwave radiation in three kinds of tempering intermittent HT0101, HT0505 and HT1010. Their characteristics of dehydration and the changes of color difference in drying process were compared. The results showed that microwave drying had influences on the capability of dehydration and the quality of color difference in different interval. The influence of HT0505 was more significant, while the other two conditions, in which there were only a small amplitude of cross and fluctuation, were approximate. In the same conditions of microwave drying, the capability of dehydration of peel and flesh separated was better than that of whole fruit, and the dehydration speed of peel was the fastest. As to color difference, the changes of peel and whole fruit were smaller and much easily to tend to stable. The change of the color difference on the flesh was obvious and finally tended to stable. The further research still needed the further study on biochemical effect during the transformation of quality.
Influences of Bentonite Modification Methods on the Physical and Chemical Properties of Bentonite
Authors: Shu Ming Yong , Yin Hai Ying , Liu Guang Hui
Published: February 2012

The current study focuses on the artificial modification of natural bentonite using pulping sodium, stacking sodium, extrusion sodium, wheel rolling sodium, and microwave sodium treatments. The effects of these methods on the physical and chemical properties of bentonite are investigated. The results indicate that the wheel rolling sodium treatment, which features the effects of extrusion and kneading, facilitated maximum separation and sodium treatment of Ca2+and Mg2+in the lattice of bentonite. This method produced highly efficient Ca-bentonite with full modification. When the wheel rolling sodium treatment was performed for 60 min, the modified bentonite exhibited a colloid index of 300 mL/3 g, swelling value of 275 mL/2 g, swelling volume of 94 mL/g, and 2 h water absorption of 755%. The modified bentonite has desirable cohesiveness, dilatability, suspension property, dispersibility, and high physical and chemical performances, which are suitable for use as iron ore concentrate pallet and casting bentonite binders.
Study and Environmental Impact Evaluation on a Coal Separating Plant
Authors: Su Rong Jun
Published: February 2012

To asses environmental feasibility of Beize coal separating plant and predict it’s influence to ambient, according to government laws, codes and regulations such as 《The Specific Guides to Environmental Impact Assessment》 and technical features of the project, the range, grade, standards, factors and prediction models of influence evaluation were determined. Then predictions and evaluations of ambient air, surface water environment, acoustic environment, solid wastes and environmental risk were undertaken. The results showed that air pollutants was 2.38t/a of smoke dust and 2.60t/a of SO2 and the coal dust discharging concentration was less than 120 mg/m3. There would be 6.0 mg/L and 16.2 mg/L increment on COD and SS respectively in the local river on the occasion of accidental discharge. Noises was 50 dB(A) or less along plant boundary. So the pollutants discharge of this project can meet relative discharge standards on the conditions of carrying out various pollution precaution measures and guaranteeing normal production. Therefore, this project is feasible from the point of view of environment.
Study on the Direction Identification and Alignment of Garlic Scaly Bud
Authors: Gao Chi , Zhang Heng
Published: February 2012

In order to automatically and accurately identify the direction of the garlic scaly bud during garlic planting, and overcome the problem about the direction identify and alignment of the garlic scaly buds, it is proposed a method of the identification garlic clove bud direction based on local image technique. It is also explained the principle of the garlic clove buds identify direction, and designed the device to adjust and identify. It has been developed the control system to do a large number of experimental, and the results show that the controller can better identify the direction and adjust the direction of the garlic. The experiment proved that the recognition rate up to 90%, indicating the feasibility of the study.
Comparative Study of the Promotion of S&T to Economic and Social Development in Hubei
Authors: Zou Wei
Published: February 2012

Integrated progress of S&T is the important factor in the Economic and Social System. Based on the analysis of the economic and social growth and integrated progress of S&T in Hubei Province during Eleventh Five-Year, with the concept of the system and in the perspective of input and output, this paper used the national statistics and the regional scientific and technological progress monitoring indicators, put forward to the deep comparative analysis among Hubei and Guangdong, Jiangsu, Shandong, Zhejiang and Fujian provinces in the eastern on socio-economic growth, integrated progress of S&T and promotion of S&T to economic and social development, then some countermeasures how Hubei to enhance the role of S&T were put forword.
Entropy Weight Multi-Level Fuzzy Comprehensive Evaluation in Power Plant Security Based on Reliability Identification
Authors: Li De Qiang
Published: February 2012

In the paper, we establish an evaluation system in the study of four aspects such as people, regulation, equipment and technology management, field management and engineering construction. We present an entropy weight multi-level fuzzy comprehensive evaluation model in power plant security on the basis of reliability identification. Firstly, it identifies the reliability of power plant security evaluation system. Secondly, it can meet the condition that the system is reliable. Then it obtains the indicator weight of all levels in the evaluation system by the entropy weight method. Finally, it carries out a comprehensive evaluation in power plant security by the multi-level fuzzy evaluation method.