bluuebunny/crossref_metadata_2025 huggingface dataset:
Study on the Curing Reaction and Rheological Behavior of Bismaleimide Resin
Authors: Sun Qiu Ju , Wang Kun Yuan , Wu Shi Wei , Dai Li
Published: September 2013

The curing reaction of the bismaleimide resin system was analyzed by FT-IR spectroscopy and differential scanning calorimetry, and the curing reaction kinetics parameters were characterized. Otherwise the rheological behavior of the bismaleimide resin was studied through tracking the changes of the resin viscosity with reaction temperature and time by using a rotatory viscometer. The rheologic dynamic equation and dynamic index of the resin were also established under the condition of constant temperature.The result showed that the bismaleimide resin system was a typical thermosetting resin. This research will help to optimize the molding process parameters of the bismaleimide resin.
Synthesis and Polymerization Kinetics of PMMA in [BMIM]BF6 Imidazolium Ionic Liquids
Authors: Wang Pei , Liu Yuan , Su Wen , Liu Lian
Published: September 2013

Polymerization of high molecular weight PMMA was achieved in [BMIPF6 by contrasted in cyclohexane, toluene solvent at reaction temperature 60 C, 65C and 70 C, reaction time 60min. The data including the yield, molecular weight and molecular weight distribution of PMMA were analysized in 3 kind of solvent. The results showed that the weight average molecular weight of PMMA in [BMIPF6 is up to 730000, respectively 7 and 10 times of molecular weight in cyclohexane and toluene. Secondly, the polymerization kinetics of PMMA in [BMIPF6 were tested, the apparent chain propagation rate constant of PMMA are 10.7×10412.9 ×104 and 19.9×104 in 60 C, 65C and 70 C. Compared with the growth rate constant in toluene, the polymerization rate constant PMMA in the ionic liquid increased by 5~10 times.
Study on Synthesis and Properties of Waterborne Polyurethane Modified by Epoxy Resin
Authors: Jin Zhi Ming , Guo Wen Lu , Gao Cai Hua
Published: September 2013

The waterborne polyurethane (WPU) modified by epoxy resin was synthesized by using isophorone diisocyanate (IPDI), poly propylene glycol (PPG-1000), 2,2-dimethylol propionic acid (DMPA) and epoxy resin as the main raw materials. The WPU properties were characterized by TGA, FTIR, and so on. The study shows that when nNCO/nOH=1.4, the mount of DMPA is 5.0%, the emulsifying property of WPU which is modified epoxy resin with high epoxy value is well. And when the mounts of E-20, E-44 are 2.0%, 4.0% respectively, the synthesized emulsion with small size has well stability. The modified WPU which possesses high hardness, low water absorption, good heat resistance and anticorrosion, has a well combination property.
Analysis Based on FLAC3D of Surface Subsidence Caused by a Double-Tube Parallel Tunnel Excavation
Authors: Guo Dong Liang , Zhao De Shen
Published: September 2013

In the double-tube parallel tunnel excavation cross-range, it will result in a larger superimposed surface subsidence, and even induce land subsidence to cause the accident. This paper uses the finite difference FLAC3D software to have a numerical simulation on double-tube parallel tunnel excavation of Dalian Spring Street Station. The land subsidence law of a double-tube parallel tunnel excavation which is obtained by analyzing the vertical and longitudinal settlement curve can predictable similar ground subsidence caused by tunnel construction and guide the safety construction of practical engineering
Influence of Ground Phosphorous Slag Powder on Performance of Cement Mortar
Authors: Wang Ye Jiang , Xu Fen Lian , Chen Jing
Published: September 2013

Comparing the activity of ground phosphorous slag (GPS) from five different areas in Sichuan province, the effects of fineness and content of GPS on cement mortar strength were studied. The results showed that all GPS produced in Sichuan complied with GB/T26751 and JC/T317 for activity requirements. With GPS dosage of 30%, the 28-day strength of cement mortar grew with the increase of specific surface area of GPS; within the dosage of 0~50%, as the dosage rose, 28-day strength of cement mortar first went up and then down, reaching the peak at 30%. When used as mineral admixtures in concrete, specific surface area of GPS is preferably 3500~4500 cm2/g, and its dosage should not exceed 30%.
Analysis of Effects of a Double-Tube Parallel Tunnel Excavation on Underground Pipelines
Authors: Guo Dong Liang , Zhao De Shen
Published: September 2013

The interaction of a double-tube parallel tunnel excavation will greatly influence on underground pipeline of its region. This paper, taking Dalian Spring Street subway station as the background, uses the finite difference software to establish 3-D finite element analysis model to simulate the effects of tunnel excavation on underground pipeline, in which different embedment, material properties and diameters are considered. By analyzing of the settlement and deformation law of pipeline, the least affected pipeline conditions are drawn to provide corresponding guidance for subsequent underground projects.
The Finite Element Analysis of Cross Steel Reinforced Concrete Special-Shaped Columns
Authors: Li Ri Liang , Xu Ya Feng , Bai Shou Yan
Published: September 2013

In order to study the force capacity of the cross steel reinforced concrete special-shaped column in horizontal load, the finite element analysis software ABAQUS has been used. We adopt a horizontal direction displacement loading method to apply horizontal load, and its displacement is 20mm. We simulate the stress distribution of the six rates of steel bone and the six different cross section sizes of steel reinforced concrete special-shaped columns. According to the result, the load - displacement curve has been dropped, and we analyze the mechanical properties of cross steel reinforced concrete special-shaped column by the curve. The results show that the bearing capacity of cross steel reinforced concrete special-shaped column has improved with the increasing of rate of steel bone and the cross section size.
Comparison between SPI and Soil Moisture Retrieved from AMSR-E
Authors: Xu Jing Wen , Zhao Jun Fang , Wang Yu Peng , Chen Qiong Lian , Zeng Li Wei
Published: September 2013

Drought monitoring is one of important researching areas. The soil moisture data retrieved from AMSR-E and SPI both can be employed as the indexes for drought monitoring. In this paper, they are compared in temporal and spatial variation in the hilly area of central Sichuan basin for 2006-2008. The results show that in general they agree well in temporal and spatial distribution. They both indicate that the hilly area of central Sichuan basin was wetter in the spring and summer and drier in winter. Besides, they become greater from the northwest to southeast of the study area.
Isolation and Polyphasic Investigation of the Carotenoids-Producing Marine Bacterium from Trachurus murphyi Chile Fishery
Authors: Zhang Xiao Ling , Yang Qiao , Zhang Heng , Huang Hong Liang
Published: September 2013

The pelagic fishery locates the wide international public sea regions and contains huge resource and technical benefits. The increasingly greater potential for exploitation of new marine microbes resource in these special sea areas has become conspicuous. Carotenoids are one of the most widely distributed and structurally diverse classes of natural pigments in plants, microorganisms and animals, performing important biological functions. The marine contains abundant biological resources and has great potential to be explored for the carotenoid resource. In this paper we reported the isolation and polyphasic investigation of the new carotenoids-producing marine bacteria from Trachurus murphyi Chile Fishery. The result has showed that marine bacterial isolated from Trachurus murphyi Chile fishery demonstrated good potential for the further exploration for bioactive carotenoids.
Experiment on the Mechanics Properties of Hot-Pepper in the Process of Hot-Air Drying
Authors: Zhang Xue Bi , Chen Si Yu , Wu Wen Fu , Zhang Ya Qiu , Liu Chun Shan , Xu Yan
Published: September 2013

In order to reduce the damage rate of hot-pepper in the process of drying and transportation, and to improve the quality of dried hot-pepper. In this paper, the mechanical properties of hot-pepper were studied in the process of hot-air drying. The experimental results showed that the hot-pepper’s compressive ability dropped with the decrease of moisture content after the moisture content reached the safe moisture content. With the moisture content decreasing, the variation tendency of the elastic modulus and tensile strain of hot-pepper were first increased and then decreased and finally tended to be stable when it reached 12％. Effect of hot-pepper’s shape on tensile strain is greater than on the maximum load and displacement in the process of drying.
Packaging Mechanical Properties of Composite Paperboard
Authors: Liu Quan Xiao , Ma Fei , Yang Jun
Published: September 2013

The effects of different kinds of pulp on structure and packaging mechanical properties of composite board. The results show that in order to obtain maximum ring crush strength of composite board, in the forming process of composite board, wheat straw pulp is used as outer layer because it has strong bonding force and higher fibrosis degree. Waste news paper pulp is used as inner layer because its cost is low.
Catalytic Destruction and Removal of Dichloromethane in the Microwave/Fe4O3 System
Authors: Lin Ching Hsing , Hsieh Yung Hsu , Chang Chen Yu
Published: September 2013

In this study, a new catalytic oxidation technology, microwave/Fe3O4 system, was used to treat volatile organic carbons (VOCs) and dichloromethane (DCM) was selected to simulate industrial emissions of VOCs. This system comprises a household microwave oven modified as the reaction chamber, which was fitted with a vertical, cylindrical quartz reactor comprising a catalytic packed column filled with granular Fe3O4, a microwave catalyst of iron (II, III) oxide. Experimental results showed that the destruction and removal efficiency (DRE) of DCM by microwave alone was close to zero, but with the microwave/Fe3O4 system, the temperature of the catalytic packed column increased rapidly and reached thermal balance within 10-15 min. Analysis of the rear gas after combustion showed that most of DCM was thermal oxidized into CO2 and H2O. The successful application of the proposed microwave/Fe3O4 system to thermal destruction of DCM promises a new technology for treatment of VOCs.
Optimization of Bubble Amount in Resin Mineral Composite Based Vacuum Pouring Procedure
Authors: Wang Tao , Zhang Jian Hua , Zhang Yi , Ren Xiu Hua
Published: September 2013

With good vibration alleviating property, resin mineral composite has been used to produce main components of machine tools to satisfy the requirements of machining efficiency. Bubble in RMC is one of the key influences on compression strength, its amount and distribution determines the overall mechanical properties of the composite directly. In this article, bubble nucleation and free energy theory are used to explain the generation mechanism of bubbles by subdividing them into two parts, bubbles generated in granite and bubbles generated in resin. Mechanical model of single raised bubble in micro cylinder channel is established based on the flow characteristics of non-newtonian fluid. In order to validate the aforementioned assumptions, typical RMC samples are produced. Strength test and draining method are used to get their compression strength and bulk density. Experimental results show that sample with vacuum pouring process has smaller bubble amount and better compression strength performance, which is consistent with the mechanical model.
Study of Extraction of Total Alkaloids from Caulophyllum Robustum
Authors: Suo Jian Lan
Published: September 2013

Objective: Optimizing the extraction of total alkaloids from Caulophyllum robustum. Methods: The taspine which is a type of alkaloids of Caulophyllum robustum is selected as the target index. First, developing the HPLC analysis protocol; second, using orthogonal design method to optimize the hydrochloric acid leaching protocol; third, using cation exchange column to isolate the alkaloids and examining the optimal conditions. Results: the optimal conditions of hydrochloric acid leaching protocol is using 7 column volume of 1% hydrochloric acid for 3 times. The materials are loaded onto the LSD001 cation exchange column with optimal pH 4 and flowrate 2ml/mL, the elution buffer is 10 column volume 5% hydrochloric acid. After desalting, the yield of alkaloids is 1.35% which includes 6.83% of taspine.
Functionalized Mesporous Silica with Ethylenediamine for Removal of Pb(II)
Authors: Luo Li Jun , Ban Ping Bao , Huang Xue Jiao , Li Jun Hong
Published: September 2013

Amine-functionalized mesporous silicas ((referred as NH2MS)) were synthesized by grafting with ethylenediamine. The obtained materials have been characterized by N2 adsorption desorption measurement (BET). Adsorption behaviors of the adsorbent for lead (containing effects factors, kinetics, isotherms, thermodynamics) were investigated. The result indicated that the obtained particles possessed mesoporous structrure. The Pb (II) adsorption isotherm and kinetic data fit Freundlich model and the pseudo second-order kinetic model respectively. the adsorption of Pb (II) onto NH2-MS was an enothermic nature.
Degradation of Organics from Laboratory Wastewater by Ultrasonic/Fenton Process
Authors: Bai Xiao Lin , Li Liang
Published: September 2013

Organics in laboratory wastewater were treated by ultrasonic/Fenton method. COD degradation of laboratory wastewater was studied, which was affected by some factors such as ultrasonic frequency, ultrasonic power, the dosage of H2O2 and Fe2+, and the initial pH. Orthogonal experiment was carried out. The results of degradation by ultrasonic/Fenton method were compared with those results when ultrasonic or Fenton was used to degrade organics respectively. The results show that ultrasonic/Fenton can effectively degrade the organic pollutants in laboratory wastewater, and the degradation efficiency is higher than that of each process alone. The optimal conditions are as follows: frequency is 45kHz, power is 120W, the concentration of H2O2 is 0.71mmol/L, the concentration of Fe2+ is 0.03mmol/L and pH is 3 in the experiment when COD of 50mL laboratory wastewater is 21972mg/L.
Synthesis and Mesomorphism of Novel Star-Shaped Liquid Crystals Containing Donor-Acceptor Groups
Authors: Yao Dan Shu , He Jun , Li Guo Hua , Xu Qian , Jia Ying Gang , Meng Fan Bao
Published: September 2013

A new class of three-armed star-shaped liquid crystals 5a-5d were synthesized, they used 1,3,5-trihydroxybenzene as a core, ω-[4-(p-ethoxybenzoloxy) phenoxycarbonyalkyl acid (3a, 3b) and ω-[4-(p-nitrobenzoloxy) phenoxycarbonyalkyl acid (3c, 3d) as mesogenic arms. Their chemical structures were confirmed by FTIR and 1H NMR spectra. The mesomorphic properties and phase behavior were investigated by differential scanning calorimetry (DSC), polarizing optical microscopy (POM) and thermogravimetric analyzer (TG) measurements. The results showed that the three-armed star-shaped liquid crystals exhibited a broad range of liquid crystalline phases at moderate temperature. The mesogenic arm structures obviously affected the phase behavior. As the intermedius alkyl chain of the star-shaped compounds lengthened (from n=4 to n=8), their melting points decreased but mesomorphic temperature ranges increased. The temperatures when 5% weight loss occurred (td) were higher than 300°C, which revealed that the synthesized three-armed liquid crystals had a high thermal stability. Threadlike, droplet and schlieren texture, typical of nematic phase can be observed in the liquid crystalline state during heating or cooling process.
Based on the DT-CWT Transformation Methods for 3D-Nanometer Roughness Rating Reference
Authors: Ren Zhi Ying , Gao Cheng Hui , Lin Jian Xing , Shen Ding
Published: September 2013

This paper proposes the third generation wavelet--double tree complex wavelet (DT-CWT) transformation used in nanometer roughness rating, based on the explanation of the shortcomings of the current nanometer roughness rating reference and conventional three dimensional datum evaluations due to the insufficient study. The experiment got porous anodic alumina film as the object of surface roughness of nanotechnology study. Through the comparisons of the three generations of the wavelet reconstruction after the maximum reconstruction error, a conclusion can be made that the superiority of DT-CWT in application is very obvious, a result meeting the16% principle of the surface roughness rating on the bases of DT - CWT extracted datum to compute income parameters, which indicates the feasibility of this application to the extraction of the nano3-D roughness evaluation. Keywords: nanometer roughness;dual-tree complex wavelet;three dimensional datum
Research on Strength Calculation for Local Area under Pressure
Authors: Pang Ping
Published: September 2013

Here individual anchored strength of prestressed end with local area under pressure was studied, the damaged mechanism of local area under pressure was discussed. The ferrule effect of peripheral concrete upon the concrete under local pressure loading is not obvious. For prestressed concrete members, especially scattered end anchorage of prestressed concrete member, the standard formula is not applicable.
Research and Analysis about Partical Compression for Individual Anchored Prestressed End Strength
Authors: Pang Ping
Published: September 2013

According to the specification given, the theoretical calculation formula of the theoretical value is higher than the measured load values. Specifications given by the bureau of compressive bearing capacity formula is suitable for ordinary reinforced concrete member. For prestressed concrete members, especially scattered end anchorage of prestressed concrete member, the standard formula is not applicable.
Turbine Rotor Tooth Head and Stress Analysis of Wedge
Authors: Zhao Li Li
Published: September 2013

The turbine generator rotor and the wedge is an important part of the turbogenerator. In order to ensure the stability and reliability of the steam turbine during operation, it needs to calculate and analyze the strength of the generator rotor and the wedge. In this paper, we did the study of the turbine generator rotor and the strength of the wedge by finite element analysis. by using ANSYS software, when in operating speed and speeding, we compared to the results of the calculation of plane and solid elements, and found that the safety factor of the plane was lower. Based on the results of two calculations, we got the generator rotor structure modification and optimization of the structural design, which improve the strength of the generator rotor tooth head and wedge.
Destruction Analysis of Broadside Multi-Cabin Protective Structure of Warship under Explosion Loading
Authors: Jiang Long Guang , Zhang Xiao Dong
Published: September 2013

Shock wave parameters of cabins for shipboard defensive structure are studied based on shock wave theory. The destroy of defensive structure can be estimated by impulse of shock wave. In the process of air shock wave propagating, isentropic suction wave is reflected from void cabin into defense structure. The solution of shock wave attenuation of void cabin can be reached by using isentropic line to replace the shock adiabatic of the reflected shock. It can be seen from the example that the multi-layers defense structure system of warship is very important to decrease the damage from explosive shock wave. The method can be used to predict the extent of damage of naval vessel.
Square Head Adjustable Die Device Research on Ship 3D CNC Forming Machine
Authors: Su Shao Juan , Hu Yong , Wang Cheng Fang , Liu Bo
Published: September 2013

Research device structure upon suppressing impress and wrinkling about three-dimensional numerical control bending machine.3D ship curved-surface outside plate automatic forming process is always the difficult part in the field of domestic and international shipbuilding. Analyzing the problems in existing processing methods ,for example, line heating technology has the defects of poor production conditions, large labor intensity, not environmental friendly and cold bending forming method may result in indentation, wrinkling or rebound phenomenon.Presents the forming process of a ship hull plate based on square head adjustable die curved surface forming device. By setting the non pressure and a plurality of planar head to replace the traditional integral die method, the paper will illustrate the composition and working principles of the process at the same time try to implement effective control of indentation and wrinkle phenomenon followed by verification through experiments.
Research on Enable Advanced Technologies for Swarm Construction
Authors: Yang Yue , An Yuan , Yang Yong An
Published: September 2013

In order to construct a swarm to accomplish the future space missions, e.g., space exploration, which will be unmanned and necessarily highly autonomous, some enable technologies should be first investigated deeply, such as deployment optimization, inter satellite link and collide avoidance. In this paper, an optimal model of deployment for satellite platforms is presented firstly, which is indeed an intrinsic multi-objective optimization model. Secondly, an inter satellite link based on free-space optical communication is designed to accomplish the information exchange among the notes in swarm. Thirdly, an effective collide avoidance strategy using potential function is put forward to reduce the lost of swarm notes during moving to the target location. With the technologies previously mentioned, swarm will exhibit the properties of self-protecting, self-healing, self-configuring, and self-optimizing compared with traditional large-size satellite. This work affords a strategy to achieve the concept mission, swarm-based space mission.
Load Prediction of RBF Neural Network Considering Weather Factors
Authors: Wei Ren Ran , Wei Zhen Zhu , Yang Hai Bo , Jiang Jian Dong
Published: September 2013

In order to improve the precision of the short-term load prediction, a new method based on radial basis function (RBF) neural network is proposed. The weather data of samples includes the temperature, humidity, date, type, etc., and is quantified according the relevance to load, and then forecasting the power load using RBF neural network model in a region, Actual example shows that this method improves the convergence speed and prediction accuracy of load forecasting.
Several Non-Rearranged Dynamic Multicast Routing Algorithms
Authors: Dai Yin Fei , Li Nian Feng
Published: September 2013

In this paper, dynamic multicast routing and routing optimization criteria have been described.By comparing and analyzing the advantages and disadvantages of several non-rearranged dynamic multicast algorithms, the advantages of the non-rearranged dynamic multicast routing algorithm based on the delay constraint have been further confirmed and a conclusion has been drawn by performance testing.
Reactive Power Compensation of Oilfield Distribution Systems Based on Tabu Search Algorithm
Authors: Wu Xiao Meng , Fei Wang Hao , Xiang Xiao Mei , Wang Wen Juan
Published: September 2013

In order to solve the problem in reactive power compensation of oilfield distribution systems at present, a Taboo search algorithm is proposed in this paper, by which the optimal location and size of shunt capacitors on distribution systems are determined. Then the voltage profile is improved and the active power loss is reduced. In this paper, Voltage qualified is used as objective function to search an initial solution that meets the voltage constraints so that it is feasible in practicable voltage range; then the global optimum solution can be got when taking the reduced maximum of active power loss as objective unction. The examples show that the improved algorithm is feasible and effective.
Fault Knowledge Acquisition of Electronic Equipment
Authors: Zou Feng Hua , Zhang Hong , Wang Lu , Li Dan
Published: September 2013

The difficulties of acquiring fault knowledge severely handicap the development of intelligent diagnosis system (IDS) of military electronic equipment (MEE) in our country.For MEE fault diagnosis of fault original data collection difficult situation, a new method is presented,Which auto-acquires fault knowledge by simulating all possible faults of equipment.The approach presented in this paper makes the work of KA engineer easier, and makes fast diagnosis fault location and fault reasons possible.
Adaptive Sliding Mode Control of the Linear Drive System
Authors: Wang Wei Bing
Published: September 2013

An adaptive sliding mode controller (ASMC) is designed for the linear drive system. The control law is expressed as a function of the disturbance which is predicted from the motor current and the active damping of the measured structural modes. Accurate prediction of the disturbance is used to actively compensate the low frequency machine tool structural modes which are within the control bandwidth. Compared with the cascaded controller (CC), the designed ASMC not only has greater control bandwidth, stronger anti-disturbance and robustness, but also improves the dynamic stiffness of the linear drive system significantly.
Research on Intelligent Control System of High Speed and High Precision Filling Disc Machine
Authors: Duan Ye Kuan , Ni Jun Fang
Published: September 2013

Traditional filling disc assembly requires a lot of manual operations and the efficiency of filling disc is not high. Human-machine interface (HMI) and image positioning system of the filling disc machine are developed in this paper, and the whole system and structure are studied on the programmable control technology. The machine realizes the functions of data real-time collection and fast accurate localization. Equipment has reached the accurate filling disc, and got an excellent application in the enterprises.
Research on Integrated Control System of the Gas Pressure in Coke Oven
Authors: Bai Xia , Guan Da Lu , Rui Chen
Published: September 2013

This paper combines hardware reliability and software mobility with modern intelligent control through the analysis of the control object using intelligent decoupling control scheme to control the pressure control system of the large gas collector in coke oven. By using expert control strategies based on the DCS, the paper develops the system design which is versatile and effective.
Research on the New Type of 12kV Inflatable Vacuum Circuit Breaker
Authors: Wang Hong Yan , Dong En Yuan , Yin Guang Xiao , Liu Mei Wei , Zeng Xiao Ping
Published: September 2013

With the rapid development of domestic economy and the construction, the application of 10 kV power system is more and more extensive and the environment of the application is also more and more complicated. Aiming at this situation, in this paper, a new-type circuit breaker is proposed for the outer environment, which is based on the Water pressure up case configuration. The configuration is fully-enclosed, small size, light-weight, and it is applicable to high temperature and humid areas. In order to study characteristics of the permanent magnetic force (PMA), the paper adopts the electromagnetic analysis software ANSOFT to analyze its static and dynamic characteristics. The experiment results show that the performance of PMA is reliable. In order to analyze the insulting property of its enclosure design with new-style and small size, ANSOFT electric field is adopted to conduct simulation analysis and the experiment results show that the design and improvement measure are stable and reliable.
Design and Implementation of Vehicle Attitude Detection and 3D Dynamic Display System
Authors: Zhang Lei , Wu Qi Sheng , Gao Rong
Published: September 2013

According to the features of high sensitivity, integration, measurement accuracy of MPU-6050 MEMS sensor, this paper design a parameters acquisition and display system based on STM32 and LabVIEW for vehicle driving attitude detection. The host computer adopts LabVIEW as a development platform which display the data collected by sensor and the vehicle attitude image. Propose a variable-weights complementary filtering algorithm to fuse the data collected by sensor. Compensating the dynamic error, obtain more accurate vehicle attitude angles.
Finite Element Analysis for Thermal Characteristics of High Speed Angular Contact Ball Bearing
Authors: Wang Peng , Lei Chun Li , Zhou Bao Cheng , Zhao Wei Ping
Published: September 2013

According to the high speed bearing failure problem caused by the high temperature, finite element model of high-speed hybrid ceramic angular contact ball bearing is established in this paper. Quantity of heat and heat transfer coefficient are calculated by using the heat transfer and thermodynamics theory, which are boundary condition for the temperature field simulation analysis of ball bearing. The temperature distribution of bearing is obtained when bearing speed is 12000rad/min. The results can provide a theoretical foundation for lubrication cooling system controlling temperature.
Research on Fuzzy PID Control for Power-Train MR Mount System
Authors: Pan Dao Yuan , Gao Xiang , Xia Chang Gao , Cai Hao
Published: September 2013

In view of automotive power-train magnetorheological (MR) mount system with nonlinearity and uncertainty, which is difficult to control, the fuzzy PID control method was proposed and studied. Based on the analysis of two-degree of freedom vibration isolation system model, the fuzzy PID controller for the control model of MR semi-active mount was designed and its simulation analysis was carried out. The simulation results indicate that MR mount combined with the fuzzy PID control method can effectively reduce the body acceleration and the force transferred to the frame. This research provides a reference for further research and development of MR mount.
Design of Temperature Control System in Incubator
Authors: Chen Shu Wang
Published: September 2013

To realize the real-time temperature measure and control rapidly and accurately in the incubator, a temperature measurement, control and display system is designed in the paper by using of the smart temperature sensor DS18B20 and the microcontroller AT89S52. The output mode of DS18B20 is serial in one-way, and its main function is to transform the temperature into the digital data and store the control word of the output conversion accuracy, which is available for data processing of single-chip microcomputer. In the actual temperature measurement it doesnt require any extra components including backup power supply, and the user can also choose the resolution. It is easy to realize multi-point measurement, connect and extend the real-time measure data. The system circuit can be applied to any field which needs multi-point measurement and real-time detection.
Output Feedback Control for a Class of Uncertain Fuzzy System by Controller Switching
Authors: Lü Huan Huan , Yang Hong
Published: September 2013

Fuzzy control does not have a precise mathematical model, but it is a very effective way to deal with complex systems stability problems. Firstly, a class of uncertain fuzzy systems is given, and in this class model the parallel distributed compensation (PDC) controller switching method is introduced. Next, the methods of single Lyapunov function and multi Lyapunov functions are respectively used to obtain the conditions which make the closed-loop system asymptotically stable. Finally using the MATLAB/SIMULINK software to simulate, verify the feasibility and effectiveness of the theoretical derivation.
Vehicle Stability Analyse with Electronic Power Steering Based on Yaw Rate Feedback
Authors: Song Hai Feng , Yang Wei Wei
Published: September 2013

A control method is proposed to improve vehicle yaw stability by the integrated control of yaw moment control. The control strategy using feedback compensator is proposed, which produces direct yaw moment and front steering angle to control yaw rate, by actively controlling the front steering angle, the integrated control system makes the performance of the actual vehicle model follow that of an ideal vehicle model. A experiment is performed at different conditions, the results showed the presented method can effectively control the yaw rate, and at the same time lighten the burden of the driver. Key words: EPS; Yaw rate feedback; Vehicle stability
Model Free Control of the Refrigeration System Based on Minimum Stable Superheat
Authors: Cheng Bao Hua , Wu Ai Guo , You Yu Wen
Published: September 2013

This paper applied model free control method to the refrigeration system evaporator minimum stable superheat control. Compared with conventional PID control, model free control method has fast convergence, anti-interference ability. Meanwhile, model free control can reduce the coupling effect between evaporator superheat and evaporating temperature and be well adapted to the variable load control requirements of the refrigeration system, which has good steady state performance and dynamic performance.
Fault-Tolerant Control System Design of UAV Based on Dissimilar Redundancy
Authors: Duan Zhen , Qiu Dong Hai , Gao Jiu Zhou
Published: September 2013

Based on the idea of dissimilar redundant design, a control structure with the fault-tolerant control function even the UAV lateral control loop that is under the state of the aileron fault is researched. The results show that the classical control can not maintain the required yaw, while the dissimilar redundant control can maintain it. The methods is simple, but can effectively avoid the flight accidents caused by aileron fault, so that to improve the safety and reliability of the flight.
Forward Position Analysis and Error Modeling of the 2UPS-RPU Parallel Manipulator
Authors: Niu Ya Wen , Wen Shu Hong , Feng Zhi You
Published: September 2013

The forward kinematics of manipulator was studied to analyze the positive position of the novel 2UPS-RPU parallel mechanism with series connection inputs. With the restrict condition of the lengths of three actuated limbs as constraint conditions, the constrained equations were established, and the four nonlinear equations were obtained to solve forward positional problems of the mechanism. Based on the elimination method, a two-dimensional equation is obtained by eliminating the four-dimensional equation. The search method based on the least square method of the MATLAB software was utilized to analyze forward position of 2UPS-RPU parallel mechanism. The results of numerical verification showed that through this method all forward solutions can be found which are basically coincident with the inverse ones, and the little error was caused by the accumulating calculation error. An error model was established based on differential theory and kinematics equations .This model simplified the installation error as the manufacturing error. Finally the error value was obtained by MATLAB ,which proved the error model was correct.
An Improved Adaptive Algorithm for INS/GPS System
Authors: Wang Li Dong , Zhao Ying , Zhang Ni
Published: September 2013

In INS/GPS system, the changing of initial conditions and the quality of the data can affect the convergence of the conventional Kalman filter algorithm. Sage-Husa adaptive filter algorithm is adopted in the INS/GPS system in this paper. The effecting of the forgetting factor to the improved Sage-Husa adaptive filter algorithm is studied and the simulation results show that when the forgetting factor taken near 0.97, the adaptive filtering result is best, the stability of the system is guaranteed and the convergent speed of error can be reduced.
A Size-Shifting Measuring Method for Multi-Diameter Shaft Grinding
Authors: Zheng Peng , Zhang Lin Na , Zhang Zhi Yong
Published: September 2013

A novel size-shifting measuring method for multi-diameter shaft grinding is presented. The principle of size-shifting measuring method is to automatically switch the zero positions of multi-diameter shaft in grinding process. Each steps zero position of the sample part and magnification of the gage head are measured before grinding. The measured values of all these steps are controlled within the gage head measuring range by auto-compensation, so that the grinding process of multi-diameter shaft can be accomplished with only one-step installation and non-stop. The size-shifting software of the function is programmed, and the hardware circuit is designed for active measuring instrument. The experimental measurement on the basis of active measuring instrument is carried out to demonstrate the validity of this suggested method. This method has such advantages as operational simplicity, high efficiency and reasonable accuracy. At the same time, the research result is beneficial to further improving the active measuring instrument.
Development of Motor and Controller's Engineering Measurement System
Authors: Ding Xu Guang , Lin Shao Fen , Chen Zi Kai
Published: September 2013

As energy crisis, the ship with electric propulsion has been the mainstream development and application trends of shipping industry and the world's navies in the present world. In order to develop domestic marine electric propulsion system, the test platform of marine electric propulsion system which can simulate the ship operating condition is constructed; the physical simulation of ship load is realized; the no-load, loading and overloading test for motors are completed. In addition, the platform can also be used to do the test for onshore equipments-the construction machinery such as electric forklift. Finally, there is no similar production in the domestic by far.
Design of Sampled Fiber Bragg Grating Comb Filter
Authors: Zhu Dan Dan , Song Jian , Hu Xiu Zhen , Zhang Yuan Yuan
Published: September 2013

This article based on the theoretical basis of sampled fiber grating, using transfer matrix method to analyse sampled fiber grating, and the analysed the spectrum of sampled fiber grating, and studied sampled fiber grating filter properties. by adjusting the parameters of sampling grating such as: the length of the grating, grating period, duty ratio ( sampling rate) and other parameters, to construct 6 comb filter, and finally come to sampled fiber grating filter preparation method and process in the theory, analysed the application of sampled fiber grating filter in some optical fiber communication fields.
Stabilization for Networked Control Systems with Limited Communication
Authors: Liu Ying Ying , Chu Yun Kai
Published: September 2013

This paper studies the stabilization problems of networked control systems (NCSs) with dynamical quantizers. A new model is proposed that takes into consideration the effect of the network induced delay, the quantization levels, and based on this model, dynamical quantization scheme is introduced. The relationship between the delay bound，the quantization range and stability is given by using Lyapunov stability theory and linear matrix inequalities (LMIs) approach, and convex condition of the stabilization controller is presented. A simulation example shows the effectiveness of the proposed method.
The Design of Dual Band Circularly Polarized Patch Antenna for Civilian GPS Applications
Authors: Jiang Guo Xing
Published: September 2013

Antenna is all important part of GPS receivers，there is a great need for the design and production of new antennas which are fully compatible with modernized signals. Because of their advantages such as low cost, compact size, low profile，ability to support dual-frequency and circular polarization operation, microstrip patch antennas have become widely used in GPS antenna designs. A circular polarization patch antennas are proposed in the paper. The antenna designed to operate at L1(1575.42MHz) and L5(1176.45MHz)frequency bands. Initially, a comer-truncated patch antenna for GPS L1 operation was designed to validate simulation in Ansoft High Frequency Structure Simulator(HFSS), the results obtained for this antenna were used to design the two proposed antennas,and designed antennas are presented．
Research on Digital I/O Modules Based on Bluetooth Communication
Authors: Kang Cun Feng , Zang Chun
Published: September 2013

Developed a pair of Bluetooth master and slave modules with embedded microcontroller, based on wireless communication technology and automatic control theory, which could be simply applied into common equipments to achieve digital I/O communication. The pair of modules separately linked the control panel and PLC, and accomplish corresponding motion control through wireless data communication. Then the master-slave modules were applied to a three-dimensional warehouse model as a case to verify their wireless control function. This research successfully solves the bondage of digital communication with cables in previous industrial field.
Research of Selective and Incremental Information Fusion Method Based on Bayesian Network
Authors: Zhang Li Wei , Zhang Jing , Sun Yan
Published: September 2013

This paper presents a selective incremental information fusion method based on Bayesian network, so that the fusion algorithm can actively select the most relevant information and decision-making, and can make the fusion model to adapt to the dynamic changes in the external environment, and sensor information selection, fusion, decision-making integrated in the framework of Bayesian network . The experimental results show that this method is better than the traditional method.
Study on the Deposition Methods of Institutional Repositories Based on Sword Protocol
Authors: Wang Xiao Shan
Published: September 2013

Aiming at the problems of institutional repositories content constructing, this paper firstly introduces the overview, development and working mechanism of SWORD(Simple Web-service Offering Repository Deposit), and then analyzes some methods based on SWORD to deposit content into institutional repositories.
Synchronization of Two Different Complex Dynamical Networks with Interconnection
Authors: Zhou Xin Lian
Published: September 2013

This paper discusses synchronization of two different complex dynamical networks with interconnection, an useful criteria for synchronization is given. We can draw a conclusion that the more points to connect between two different networks, the shorter time to achieve synchronization.
A New Algorithm of Weld Seam Detection Based on Mathematical Morphology
Authors: Zou Bao Juan , Fang Na , Zeng Ren Xian
Published: September 2013

Weld seam tracking is the key technology of industrial robot. It satisfies accuracy and real-time demand. This paper presents a robust recognition algorithm for weld seam images based on mathematical morphology. This algorithm used the morphological filtering for image enhancement at first, and then applied Otsu threshold segmentation in local. Besides, it implemented region filling and morphological thinning operation to get the segmented weld seam. Finally, the Hough transform was adopted to detect the straight lines from the weld image. The results prove that this method not only can detect the seam tracking in real-time, but also can identify weld seam automatically.
Non-Invasive Image Processing Method for Detecting Seed Vigor
Authors: Li Ming Jian , Guo Jia Han , Yu Zheng , Yan Lei , Han Ning
Published: September 2013

With the development of technology, the agricultural industry has become far more efficient and mechanization. In this paper, image processing method was adopted to detect the changes in seeds temperature, aiming at discovering the laws in seed germination. Oak seeds were selected as samples. The method can be divided into two steps----image segmentation, data extraction and analysis. 32400 images for 90 seeds were captured, and the changing curve of seeds temperature was described based on the images we collected. The result showed that the method was available to capture the changes of seeds temperature during its germination. Even, further research aiming at distinguishing seeds vigor by temperature information, is of great value.
A Research Review of Hilbert-Huang Transform Used for Rolling Bearing Fault Diagnosis
Authors: Li Qi , Wang Hui
Published: September 2013

Non-stationary vibration will appear when the fault rolling bearing is running. This paper summarizes the development present situation of application of Hilbert-Huang Transform solving the problem of rolling bearing fault diagnosis at home and abroad from several aspects, analyzes the current rolling bearing fault diagnosis methods combined with HHT, and sums up the practical applicability of HHT method through the comparison of rolling bearing fault diagnosis with other methods. It points out that HHT used for rolling bearing fault diagnosis still has problems to be solved. At last, it gives the future research direction of HHT.
Analysis of Pipeline Dynamic Flow Signal Coupling in Hydraulic System
Authors: Zhang Jun , Wang Wei , Tang Hong Mei , Li Xian Hua , Fu Chun Bao
Published: September 2013

The dynamic measurement of the high pressure side flow in hydraulic system is still one of the important and difficult problems in hydraulic test technique. In order to solve the dynamic coupling mechanism between main and bypass oil-way fluid flow signals in the bypass flow measurement method, hydraulic system software was used to analysis the problem in this paper, the dynamic coupling relationship between main and bypass oil-way fluid flow signals were obtained. Finally verify the feasibility of the bypass flow measurement method.
Analysis about Coordinate of Cepstrum and its Application in Gearbox Fault Diagnosis
Authors: Guo Yan Jun , Han Jie
Published: September 2013

The definition of cepstrum analysis, diagnostic characteristics and the advantages of the method in gearbox fault diagnosis were introduced in this paper, and what are units and significance of horizontal and vertical coordinates of cepstrum was also analyzed , along with the cited examples of cepstrum analysis in gearbox fault diagnosis application .
Based on k-Medoids and c5.0 Joint Constraint of the Drug Information Mining Algorithm
Authors: Zhang Hui
Published: September 2013

When the mass data information for drug contains no real or noise effects of information, the general data mining analysis method will have a great advantage, the traditional medicine association behavior is used in the analysis of a categories data mining analysis method, ignore drug data analysis results and the practical next behavior prediction contact. In order to solve the problem put forward the k-medoids and c5.0 joint constraints drug data mining methods, and in the first step of clustering analysis of fully considering the effect of noise and isolated points, with the first step clustering results were late to the classification of the decision tree as data sample, and the appropriate data pretreatment, so it can guarantee the accuracy of the calculation model. Experiments prove this drug data analysis models are available, the mining efficiency is higher.
Research on Maize Varieties Recognition System Based on Image Processing
Authors: Deng Li Miao , Luan Tao , Ma Wen Jie
Published: September 2013

In order to realize highly intelligent and automatic species identification and recognition, we obtained the images of 11 varieties and each variety includes 50 seeds. For each image, we acquired 33 characteristics including shape, color and texture characteristics. And then we constructed the Artificial Neural Network and Support Vector Machine model to train and identify different varieties. We built the recognition system based on Visual C++ 6.0 and OpenCV library.Results shows that the SVM method has higher recognition effect than neural network overall and the recognition effect is more stability, the overall self-_recognition performance can reach 100% and test accuracy can reach 85%. The recoginition System base on Visual C++ runs faster than that of Matlab, which is more suitable for real-time varieties identification.