bluuebunny/crossref_metadata_2025 huggingface dataset:
Application of Internet of Things in Monitoring System of Intelligent Building
Authors: Qu Hong Mei , Tao Xiao San
Published: September 2013

The intelligent controlling system of intelligent building can apply Internet of Things (IoT) technologies for creating various controlling operations. The aim of this paper is the development of an intelligent monitoring system of intelligent building based on IoT. We introduce the working principle of the monitoring system, the hardware platform as well as its software collectivity frame. In addition, some key technologies for implement the monitoring system are described. The system can carry out various functions, such as fault detection, data processing, storage and alarming of the operating status parameters, querying history data, tracing real time instances by means of acquiring the operating status data from various testing sensors and the like. It also can record various types of operating parameters and send them to control platform by network. The system could effectively solve the problem of the monitoring and management of the operation tasks. Consequently it could greatly improve the efficiency of the management and controlling of the intelligent building.
Control Algorithm Analysis of Rig's Electro-Hydraulic Proportional Control System
Authors: Zhao Xiao Ying
Published: September 2013

The electro-hydraulic proportional control system of the rig rotary mechanism was designed, and the work principle and system structure were introduced. On the bases of analyzing the characteristics of PID control algorithm and Fuzzy control algorithm, the design and research were carried. Simulation experiments show that the Fuzzy - PID algorithm effectively improves the control performance of the control system, and has a good environmental adaptability.
Coordination Control for RBS and ABS
Authors: Yang Yi , Chu Liang , Yao Liang , Wen Jing
Published: September 2013

This paper puts forward 3 new coordination control states based on the analysis of the control logic of pure hydraulic ABS during braking .In order to reduce the regenerative brake force, we make the logic conversion according to the present coordination control method and the hydraulic brake force can compensate the regenerative brake force. The simulation results show that the 3 states proposed in this paper combine the present coordination control method and optimize the coordination control of the regenerative brake force and the hydraulic brake force under the anti-lock braking condition.
Research on Electro-Hydraulic Proportional Self-Tuning Fuzzy-PID Control System Based on MATLAB
Authors: Li Min Jjie , Ren Guang Sheng
Published: September 2013

The bogie separated equipment for straddle type monorail vehicle was researched, and the mathematics model of proportional hydraulic valve cylinder lifting system was set up and simulated. Based on the PID controller theory and the principle of fuzzy control, the fuzzy self-turning fuzzy-PID controller was designed. According to the fuzzy logic tool box and simulink of MATLAB, the simulation study was carried out. The results indicate that, the self-tuning fuzzy-PID controller can satisfy the requirements of the control system well.
The Electronic Control System of Automatic Optical Scissors and Optical Tweezers
Authors: Li Yi Zhi , Shen Shun Quan , Ye An Pei
Published: September 2013

Optical tweezers and optical scissors is becoming a widely used technology. However, optical tweezers system that has been used, is not well automatic and convenient to operate. This article will introduce an automatic control system, mainly by describing the design, the composition and function of the system, which can automatically control each part of the entire platform by using a computer. The spatial resolution of the system has reached sub-nanometer level.
Optimal Model of Predicting the School Effectiveness of Universities
Authors: Rao Cong Jun
Published: September 2013

The school effectiveness of a university is directly related to the implementation of national talent cultivation, school functions and educational goals. In this paper, aiming at the problem of predicting the school effectiveness of a university, the deficiency of traditional prediction model is analyzed, and a prediction model of predicting the school effectiveness of a university is established based on grey prediction theory. The model is applied in predicting the school effectiveness of Huanggang Normal University combined with the relative data in recent years, and a satisfactory forecasting result is achieved.
Study of Chinese Tourism Planning towards Cultural and Regional Integration
Authors: Liu Yong Jin
Published: September 2013

This article discusses the current situation and development of Chinas tourism planning, expounds the close relationship between culture and tourism. It Points out that the cultural heterogeneity and differences generate tourism, at the same time, tourism has promoted cultural exchange, development and heritage. With the further development of tourism, tourism planning and construction of tourism system will integrate within a larger region. Finally, it concludes that Chinas tourism planning will push culture and region towards integration, this article also hopes to play a valuable role in building up the large regional tourism culture system.
Study on Numerical Simulation of Secondary Dust Deposition Phenomenon
Authors: Ling Bicao Can , Ju Hai Yang , Ye Zheng
Published: September 2013

At present, study of coal mine dust mainly focuses on the specific area of concentration distribution of particles of different diameters, and the trajectory of the research, especially the numerical simulation research is rarely involved, this paper applies the method of numerical simulation, and the establishment of dust particles starting mathematical model, research dust in coal mine roadway within the two flying of dust flying, aiming at the two problems, putting forward reasonable and effective methods to prevent the harm caused by secondary dust flying.
Family House-Purchase Decision Model Based on Analytic Hierarchy Process
Authors: Wang Cheng
Published: September 2013

Housing is the basic livelihood of the residents, and the residents need to consider many factors include the price, the quality, and the surrounding environment in the house-purchase decision. Aiming at the actual problem of family house-purchase decision, this paper established a family house-purchase decision model based on Analytic Hierarchy Process (AHP). Concretely, a hierarchical chart of family house-purchase is constructed based on four factors, i.e., housing price, housing quality, supporting facilities and traffic convenience degree, and then the decision method based on AHP is given to rank the order for the alternative commercial housings. It will provide the decision reference for feasible and effective decision-making of family house-purchase.
Effect of 1-MCP and O3 on the Qualities of Dendrobium Officinale Storage
Authors: Meng Jian Qing , Liu Hai Jiao , Li Xi Hong , Chen Lan , Du Lin Xue , Luo Jin Shan
Published: September 2013

The aim of this work to evaluate the influence of 1-MCP, O3and 1-MCP+O3to Dendrobium officinale. 1-MCP could inhibit plants respiration rate, and it was 14.57 mg CO2·kg·FW·h-for 7 days which lower than CK and O3had similar inhibitory effect to respiration.1-MCP, O3could inhibit weight loss and O3was more significant than 1-MCP, but 1-MCP+O3treatments weight loss was similar to CK for 60 days, however 1-MCP+O3had significant effect on color change, it could inhibit color change during storage for plants.
Regenerated Bamboo Fiber from Green Solvent
Authors: Cai Tao , Wang Yi Man , Yang Yu Rong , Wei Min , Wang Min Kui
Published: September 2013

Regenerated bamboo fiber was prepared with green solvent. The rheological behavior of the spinning solution was investigated and a dry-jet wet spinning process was applied for making bamboo fiber. The results showed that spinning solution belonged to the typical shear thinning fluid, and it is found that the content had influence on the apparent viscosity of solution. In addition, the regenerated bamboo fiber had cellulose II crystal structure. and the orientation and crystallinity of fiber increased with the increasing of draw ratio, thereby the mechanical properties of fiber improved.
Research and Preparation for Nanoemulsion of Macadamia integrifolia Oil
Authors: Zhu Bing Qing , Lin Li Jing , Li Ji Hua , Huang Mao Fang , Zhang Kang Yi
Published: September 2013

Oil-in-water (O/W) nanoemulsion ofMacadamia integrifobliaoil was prepared. The nanoemulsion with the minimum diameter (22.13 nm) would be gained at the ratio of surfactant (Tween-80): cosurfactant (olive oil): oil phase (ethanol)=9:2:1, 86.4% distributing between 10~30 nm, spherical. TheMacadamia integrifobliaoil nanoemulsion was still clarity, homogeneous and stable after the stability tests.
Synthesis and Characterization of Luminescent Properties of NaGdF4 Phosphors
Authors: Li Chang Lin , Li Tian , Liu Jing , Wang Xin Ze , Gao Hong Jian , Liu Zhong Xin , Song Wen Zhi
Published: September 2013

β-NaGdF4: Yb, Tm/β-NaGdF4: Eu and β-NaGdF4: Yb, Tm, Eu particles were successfully synthesized by two different methods, solvothermal method and high-energy ball milling. The properties were measured by X-ray diffraction (XRD), TEM and luminescence spectra. All samples shown the strong photoluminescence intensity under 980 nm light excitation and emission of Eu3+ was observed. Finally, two methods are compared in paper.
The Temperature Field Caused by Sphere Inclusion in Dielectric Irradiated by Single Pulse Laser
Authors: Huang Cai Hua , Sun Xiao Hua , Sun Yi Hua
Published: September 2013

The thermal effect arisen from absorbing inclusions is the main factor which causes the damage of optical materials or component irradiated by the longer pulse duration laser. The unsteady heat conduction depends markedly on both the thermal properties of inclusions and the parameters of laser. Based on the differential equation of heat conduction, the temperature distribution caused by single absorbing inclusion is solved by use of finite difference method. The effect of the laser intensity and the pulse duration on temperature field is analyzed in detail. The result demonstrates that the smaller size inclusion and the smaller pulse duration cause relative safe thermal effect, consequently, the less probability to be damaged by thermal effect.
Synthesis of Light Olefins from CO2 Hydrogenation on Fe/ZSM-5 Catalyst
Authors: Yang Lin , Li Jing , Cao Jian Xin
Published: September 2013

A Fe/ZSM-5 catalyst was prepared by impregnation method and evaluated in the synthesis of light olefins from CO2 hydrogenation. It is found that The conversion of CO2, the yield of light olefins and hydrocarbons content reach 82.42%, 12.65%, 0.4885mol respectively under the conditions as follow, mass concentration of ferric nitrate 9%, silica to alumina ratio 25, calcination temperature of the catalyst 500°C. By the studies of NH3 temperature programmed desorption, performance changes of the catalysts was analysis. A possible mechanism is proposed on the basis of mineral composition changes of Fe/ZSM-5 catalyst in the synthesis of light olefins through XRD analysis.
Progress of Purification and Application of Barite
Authors: Huang Teng , Lei Shao Min , Wang En Wen , Bao Guang Ming
Published: September 2013

Barite, as a significant nonmetallic mineral can be widely applied to the fields such as coating, rubber, medicine and other high-tech industrials. While the physical and chemical purification is to remove the impurity elements, so as to confirm to the criteria of relevant industry. The text also summaries the methods of activation and proposes some new applications of barite.
A Research on an Inner Core Replaceable Alkaline Batteries
Authors: Qiao Dan Yang , Lin Xiao Qing , Lin Le Huang , Lin Wen Chuan
Published: September 2013

The existing alkaline batteries which businesses are unwilling to recycle can only be discarded after used, resulting in a lot of environmental problems. The crust of batteries is made of special steel which can be used repeatedly costing the 1/3 total costs. Batteries are divided into three parts: steel, core, and bottom closures. Thread at the bottom of steel corresponds with the screw thread at the bottom of the closures. As long as screw off closures, load the core, the battery can be used again. The whole process is simple. Creative design has advantages on the structure and energy, environment and energy, economic and cost, greatly improving the recovery efficiency, reducing the cost of recycling and environmental pollution, and has huge economic, social, environmental benefits.
Preparation and Characterization of Foaming Poly (phenylene ether ketone) PPEK by Using Supercritical Carbon Dioxide
Authors: Qu Min Jie , Zhu Shi Yang , Zheng Lai Jiu , Li Tian Qi , He Ling Ling , Guo Jing , Zhao Jian , Du Bing
Published: September 2013

This paper presents foaming behaviors of PPEK blown with supercritical CO2. The cell density and cell size of PPEK at various process conditions were studied. The experimental results indicate that saturate pressure, foaming temperature and suitable foaming time can provide a positive impact on improving the cell morphology of PPEK foams.
The Application of Differential Scanning Calorimetry to Thermal Analysis for Energetic Materials
Authors: Chen Yong Kang , Chen Ming Hua , Zhang Tao , Wu Xiao Le
Published: September 2013

Differential Scanning Calorimetry (DSC) is a common and useful method for thermal analysis. This paper briefly introduces the thermal decomposition characteristic determination of the main components of propellant by DSC assay and the applications of DSC in thermal stability and compatibility evaluation research of energetic materials.
The Effect of Gas Distributor Settings on the Separation Characteristics of Air-Dense Medium Fluidized Bed
Authors: Li Ling Yue , Dou A Tao , Zhu Xue Shuai , Li Da Hu , Wei Lu Bin
Published: September 2013

Sintered board and porous board was used to be gas distributor of air-dense medium fluidized bed in the experiment, the influence of different gas distributor settings to fluidization and separation characteristics was investigated; The results showed that, under the same conditions, the pressure drop of sintered board gas distributor is greater than porous board gas distributor. The pressure drop of gas distributor is proportional to the layers of filter cloth and air volume. The uniformity and stability of sintered board gas distributor with 1 layer filter cloth is bad, sintered board gas distributor with 2 layers filter cloth and porous board gas distributor with 5 or 6 layers filter cloth can obtain a better fluidizing effect; Conducting separation experiment on fat coal of 50 ~13mm under the suitable air volume, porous board gas distributor with 5 layers filter cloth has the best separation accuracy, and its probable error Ep value is 0.05 g/cm3.
Steam Injection Performance of Horizontal Wells Completed with Slotted Liners
Authors: Chen Hui Juan , Li Ming Zhong , Zhang Yan Yu , Li Wei Wei
Published: September 2013

Considering the impact of gas-liquid two-phase variable mass flow in horizontal wellbore, combined with the principle of mass, momentum and energy conservation, a simple prediction model was developed to simulate the steam injection performance of horizontal wells completed with slotted liners. Based on the model, the profiles of steam pressure, temperature, quality and flow rate to the reservoir along the slotted horizontal wellbore were studied. The results show the steam pressure, temperature, quality and steam flow rate to the reservoir all gradually drop from the horizontal heel to the toe. However, the decrease of steam pressure and temperature are not so remarkable, but it is conspicuous for steam quality and steam flow rate to the reservoir. It is crucial to develop the techniques to guarantee a uniform flow along the horizontal wellbore.
A New Stretch-Forming Process Based on Loading at Discrete Points and its Numerical Investigation
Authors: Cai Zhong Yi , Wang Mi , Che Chao Jie
Published: September 2013

A new stretch-forming process based on discretely loading for three-dimensional sheet metal part is proposed and numerically investigated. The gripping jaw in traditional stretch-forming process is replaced by the discrete array of loading units, and the stretching load is applied at discrete points on the two ends of sheet metal. By controlling the loading trajectory at the each discrete point, an optimal stretch-forming process can be realized. The numerical results on the new stretch-forming process of a saddle-shaped sheet metal part show that the distribution of the deformation on the formed surface of new process is more uniform than that of traditional stretch-forming, and the forming defects can be avoided and better forming quality will be obtained.
The Experimental Study of Organizational Structure of Welded Joint and Combining Performance of Laser Welding of Vacuum Glass
Authors: Liu Wei , Zhang Rui Hong , Miao Hong
Published: September 2013

The laser welding system is used to weld vacuum glass,the organizational structure of welding joint and the combining performance of the laser welding in different speeds are studied in this text. Under the same laser output power,welding combining performance and organizational structure are ideal both in the speed of 5mm/s and 10mm/s. It shows that laser welding is an effective method of the edge welding of vacuum glass. By comparison with experimental results, better solder welding joint organizational structure and combining performance can be obtained when the welding speed is 5mm/s than the welding speed is 10mm/s. It explains that appropriate laser welding speed is one of the effective methods of optimizing vacuum glass welding under certain laser output power.
Precision Measurement for Drill Helical Flute Curve
Authors: Peng Yan Ping , Bai Bing , Sun Qiu Hua , Zhang Wei , He Feng Bao
Published: September 2013

Accurate measurement for the flute curve of drill is essential to its design and the evaluation of cutting performance of drill. The helical flute curve of the drill has a big influence on the shape of the　main blade, the exhaust of the chip, and the supply of the coolant etc. In this paper the measuring method of flute curve is described. As the measuring method,　the lead, helical angle, normal section shape (flute curve) was measured respectively. Then the measured data are analyzed with digital filtering, smoothing etc., thus the normal section shape and cross-section shape data are gained. The measured data agree well with the known values. The proposed measuring method may be applied not only to the measurement of flute curve of the drill but also to the measurement of the other helical flute curves.
Failure Analysis and Remanufacturing of Construction Machinery Shafts by HVOF Technique
Authors: Ma Ning , Wu Huan Tao , Ye Fu Xing , Zhang Guo Sheng
Published: September 2013

In this work, a scrapped cross shaft which was assembled at the differential of ZL50C loader was analyzed by scanning electron microscopy (SEM) to examine the failure mechanism and was remanufactured by HVOF with ~500μm thickness WC-12Co coatings on it. The microstructure, phase compositions and properties of deposited WC-12Co coatings were investigated through optical microscope (OM), SEM, X-ray diffraction (XRD), microhardness tester and tensile testing machine. The results show that the coatings were very dense, and their porosities were lower than 1%. According to the X-ray Diffraction (XRD) analysis, the phase compositions of the sprayed coatings consisted of WC, Co and W2C. The microhardness of the coating was approximated to 1100 HV0.1and the bonding strength was higher than 63.7 MPa. It can be concluded that WC-12Co coating sprayed by HVOF was suitable for the remanufacturing of shaft parts.
Model Adaptive Learning in Process Control of Strip Cold Rolling
Authors: Bai Jin Lan , Li Xiang , Wang Jun Sheng
Published: September 2013

In this paper, mathematic models of processing parameters and their adaptive learning principle in strip cold rolling mill are introduced. Exponential smoothing method is used during model adaptive learning. According to the contrast between actual and calculated data, adaptive learning coefficients in the process control models are modified, thus the precision of presetting model is improved. Based on three kinds of adaptive learning modes, corresponding model adaptive learning program is developed for strip cold rolling. The practical application shows that the accuracy of this method can meet the requirement of on-line process control, and it is suitable for process control in strip cold rolling mill.
Selective Laser Melting Bone-Compatible Pure Titanium Porous Structure
Authors: Li Zi Fu , Zhang Chun Yu , Qi Liu Ju , Sun Xue Tong
Published: September 2013

In this paper the effect of selective laser melting (SLM) input energy density on densification behavior and tensile strengths of commercially pure (CP) titanium was investigated. Fully dense and high strength SLM CP titanium has been obtained. A complex bone-compatible tetrakaidecahedron based porous structure has been successfully SLM-fabricated with optimized laser parameters.
Effects of Annealing and Different Substrate Materials on Ohmic Contact Property of IGZO Films
Authors: Shi Ji Feng
Published: September 2013

Amorphous InGaZnO(a-IGZO) films were deposited on the glass substrates with Al/Mo/ITO films separately using magnetron sputtering and photograph methods,to form resistance structures between a-IGZO films and Al/Mo/ITO films.These samples were annealed in the air and N2 ambience in a series of temperature separately.The results show that regardless of N2 or air ambience,samples annealing at 250 degrade,IGZO films show a good ohmic contact characteristic withAl/Mo/ITOmaterials.And,IGZO films have a better ohmic contact characteristic with ITO/Al than Mo. The transmittance of the IGZO films annealed is better than the transmittance of samples without annealing.And ,the transmittance of samples annealed is rising with the increasing of annealing temperature. Considering the optical and electrical properties of IGZO films, we suggest that 250 centi degrades is a suitable temperature for annealing.
Methodology of the Experiment for Determination of Parameter Ra for the Methods of Finishing Machining
Authors: Bartoš Rastislav , Görög Augustín
Published: September 2013

Paper presents an analysis of possible relationships to calculate the roughness parameters Ra finishing with rotating parts. Based on the selection of variables involved, wanted variables and factors to establish differential equation. The equation contains in addition of the factors also the constant, which must be established experimentally. For this case, it is appropriate to use the method of planned experiment, which would be extended to a new method for determining of various mathematical relations for Ra. The presented methodology can be applied to the determination of Ra with other methods of finishing machining, especially with the grinding.
Resistance Spot Welding of Advanced High Strength TWIP Steels
Authors: Russo Spena Pasquale , De Maddis Manuela , Lombardi Franco , D’Aiuto Fabio
Published: September 2013

In this study, advanced high manganese austenitic steel sheets were welded by resistance spot welding at different welding parameters. The effects of welding current, clamping force, number of the current impulse, and duration of each current impulse were examined. Based on Taguchis method, an L-27(313) orthogonal array was employed for carrying out resistance spot welding tests. The welded sheets were subjected to tensile-shear tests in order to determine the strength of the welded joints. Basically, the results showed that tensile-shear strength increase with clamping force at the medium and high effective welding time (>400 ms). However, the occurrence of micro cracks within the welded joints may justify the scattering of tensile-shear strength values.
Preparation and Dielectric Properties of La Doped Bi2Al4O9
Authors: Zhang Xiao Yan , Qi Xi Wei , Wei Jun Fang , Hu Wen Shu , Sun Gui Fang , Zhong Rui Xia , Chen Huan Huan
Published: September 2013

A series of (Bi1-xLax)2Al4O9(x = 0, 0.05, 0.10, 0.15, 0.20, 0.25, 0.30, 0.40) ceramics were prepared by sol-gel method with sintering process. Doping dependent investigations were carried out to show the influence of La atom on the structural stability. The products were characterized using X-ray diffraction, scanning electron microscopy. This showed that the second phase is increased gradually by La doping. When the value of La is 0.4, the main phase tends to become LaAlO3. Details on dielectric properties are reported. The permittivity of as-prepared doped samples increases slightly compared to pure Bi2Al4O9and excellent frequency stability is exhibited.
ECM Parameters Modeling and Optimization Using WSGA
Authors: Jegan T.M. Chenthil , Ravindran D. , Anand M. Dev
Published: September 2013

Electrochemical machining (ECM) is a non tradition process used for the machining of metal matrix composites. Metal matrix composites are used for applications in aero scope, automobile industries and medical field. Determination of optimal process parameter is difficult in ECM machining process for obtaining maximum Material Removal Rate (MRR) and good Surface Roughness (SR).The multiple regression model was used to obtain the relationship between process parameters and output parameters and Weighted Sum Genetic Algorithm (WSGA) optimization was proposed to optimize the ECM process parameter. .The Voltage, Current, Feed Rate and Electrolyte Concentration are considered as decision variables, MRR and SR are the machining parameters used in the proposed work.
Dynamic Response Analysis of Butt Joint of HTS-A Steel Considering Welding Residual Stresses
Authors: Shen Wei , Yan Ren Jun , Xu Lin , Qin Kai , Zhang Xin Yu , Geng Li Ming
Published: September 2013

This paper uses both numerical simulation method and experimental research method to study on welding residual stress of high-strength steel of the cone-cylinder hull. Welding is often accompanied by a larger welding residual stress, which directly affects the safety and service life of the hull structure. In order to obtain the distribution of the welding residual stress, the welding procedure was developed by its parameter language by using FE analysis software in this paper. Then the welding residual stress of hot spot region was measured through X-ray nondestructive testing method, and compared it with simulation results. Finally, considering the residual stress as the initial stress, this paper analyzed dynamic response process of the welding structure under combined actions of the welding residual stress and multiaxial loads, which could more accurately determine the stress of welding structure and the location of fatigue risk point. According to the amplitude of damage parameters and strain time-history curve, we can estimate the fatigue life of structure by selecting the corresponding damage models.
Optimization Study on the Tooth Profile of Gear Shaping Roller of Honeycomb Semi-Cell Structures
Authors: Qin Lei , Ma Yan Ting , Luo Chang Jie
Published: September 2013

In order to solve the problem of low accuracy of honeycomb semi-cell structures which are rolled by traditional trapezoidal tooth profile gear shaping rollers, conjugate trapezoidal tooth profile gear shaping rollers have been put forward to improve the quality of honeycomb semi-cell structures, basing on the theoretical analysis. Using ANSYS/LS-DYNA, a finite element model of rolling aluminum foils by two kinds of tooth profile shaping rollers was set up. Then results of numerical simulation indicate that the honeycomb semi-cell structures rolled by the conjugate trapezoidal gear shaping rollers are closer to the ideal size than those rolled by the traditional trapezoidal gear shaping rollers.
The Design and Implementation of Remote Intelligent Conference Attendance System Based on RFID
Authors: Chang Yan Fen , Jin Zhi Yuan
Published: September 2013

The article draws lessons from radio frequency identification RFID identification results at home and abroad, put forward the general framework of RFID conference attendance system, to realize the higher requirements of the real-time conferencing electronic data storage, query, statistics and other functions, to realize the conference management be intelligent, barrier-free remote control.
Method on the Fault Detection and Diagnosis for the Railway Turnout Based on the Current Curve of Switch Machine
Authors: Mo Xue Mei , Fang Yu , Yang Yun Guo
Published: September 2013

This paper proposes a method of the fault detection and diagnosis for the railway turnout based on the current curve of switch machine. Exact curve matching fault detection method and SVM-based fault diagnosis method are adopted in the paper. Based on envelope and morpheme match algorithm, exact curve matching method is used to match the detected current curve with the reference curve so as to predict whether the curve would have fault or not. Moreover, the SVM-based fault diagnosis method is used to make sure that the fault conditions could be diagnosed intelligently. Finally, the experimental results show that the proposed method can accurately identify the turnout fault status in the conversion process, and the accuracy rate in the diagnosis of the fault location is above 98%, which verify the effectiveness of the method in the fault detection and diagnosis.
Research on Harmonic Suppression for Micro Grid-Side Inverter Based on Synthesis Harmonic Impedance
Authors: Wang Xiang Ming , Zhao Wen Ting
Published: September 2013

There exists harmonic interference problem when micro grid-side inverter connecting to grid with nonlinear load. The harmonic impedance loop is added in the voltage output loop to suppress harmonic in grid-side inverter. Using instantaneous reactive power theory to extract the main frequency harmonics, a new harmonic impedance is synthesized in the voltage control loop. The voltage control loop mainly presents the performance of resistive impedance and suppresses the harmonic interference while the inverter grid-connected. The Matlab/simulink simulation shows the method can effectively suppress the harmonic of grid.
A Hardware Method of Realizing IRFPA Nonuniformity Compressing Correction
Authors: Li Peng Fei , Du Zhi Hui , Li Xing Fu , Liu Yong Qiang
Published: September 2013

Nonuniformity of Infrared Focal Plane Array (IRFPA) has greatly limited the quality of infrared imaging system, so nonuniformity must be corrected before using IRFPA. In order to reduce nonuniformity correction calculating amount and improve real-time nonuniformity correction speed, a new compressing correction method of utilizing hardware memory is presented. In this paper, memory compressing correction principle and implementing process are expounded in detail, and the hardware circuit diagram is given out. The experimental results prove that the method has simple circuit and excellent image quality and it easily realizes real-time nonuniformity correction.
Adaptive Output Feedback Control of Multivariable Nonlinear Systems Based on Hurwitz Assumption
Authors: Yu Xiao Wei , Lin Yan
Published: September 2013

In this paper, global adaptive output feedback tracking problem is considered for a class of multivariable nonlinear systems with unknown parameters and nonlinear terms linear in unmeasured states. Based on a modified high-gain observer and Hurwitz assumption of high frequency gain matrix, an adaptive backstepping design is proposed, which is able to guarantee global stability of the closed-loop system and circumvent the over-parameterization problem raised by using conventional back stepping method.
A Detection Scheme against Node Replication Attack in Wireless Sensor Network Based on Bloom Filter and QR Decomposition
Authors: Xie Wei Min , Wang Lie Jun , Wang Ming Wei
Published: September 2013

Based on the bloom filter and QR decomposition, a detection scheme against node replication attack in wireless sensor network was proposed. The scheme used the bloom filter to generate the geographic fingerprints of the nodes. According to the principle that the same ID cannot have two different geographical locations, when the receiver found the conflicting fingerprint, the node replication attack was detected. Matrix QR decomposition can guarantee the network security and provide verification of the link
Classification Algorithm of Regression Support Vector Machine and its Application to Environment Monitoring in Water Culture Plants
Authors: Yan Man Fu , Wang Jiu Hai
Published: September 2013

In this paper, it applies Gaussian loss function instead of ε-insensitive loss function in a standard SVRM to devise a new model and a new type of support vector classification machine whose optimization problem is easier to solve and has conducted effective test on open data set in order to apply the new algorithm to environment monitoring in water culture plants and the monitoring result is better than any other method available.
Research of Intelligent Traffic Light Control System Design Based on the NI ELVIS II Platform
Authors: Wang Yuan , Zhou Mi
Published: September 2013

In this paper, introduces a crossroads two-way intelligent traffic light control system based on the virtual instrument technology. The programming language Laboratory Virtual Instrumentation Engineering Workbench (LabVIEW) is used and the NI Educational Laboratory Virtual Instrumentation Suite II (NI ELVIS II) platform is chosen as target device in designing this control system. The control kernel of the system is LabVIEW program, it can realize lots of functions, such as adjusting the passing time in all directions and the duration of the yellow light, passing time count down and treatment of abnormal traffic. The experiment proves, NI ELVIS II platform than traditional experimental teaching equipment more innovative, flexibility and practicality, be helpful for students in the field of innovation ability training.
A Design of EBG-PIFA for RFID Applications in UHF Band
Authors: Li Hong Mei , Wang Jin Yue , Xing Li Kun , Cao Xin Yu , Yang Tie Xin
Published: September 2013

One of the longstanding problems in planar inverted F antenna (PIFA) is its efficiency, which reduces as PIFA is placed too close to the ground. In this paper a kind of mushroom-like Electromagnetic band gap (EBG) structure with three conductor layers is designed In the UHF band, which has smaller unit cells and thinner thickness compared to classical ones. This kind of mushroom-like EBG structure is used as the reflector of PIFA with capacitor structure. It is demonstrated that PIFAs with EBG grounds have higher radiation efficiency than those with PEC ground. At the same time, no significant changes in the antenna resonance frequency and the radiation patterns are found. The theoretical prediction is well verified by results of both simulation and experiment.
Simulation of the Squeeze Film Damping in a RF MEMS Switch
Authors: Li Xiang Guang , Huang Qin Wen , Wang Yun Hui
Published: September 2013

Two different dynamic models have been presented to investigate the transient mechanical response of a RF MEMS switch under the effects of squeeze-film damping based on a modified Reynolds equation. Both the perforated and non-perforated structures are built for comparison. The models include realistic dimensions. The surface pressure, the damping force, and the tip displacement are simulated in three different ambient pressures, such as 500Pa, 5kPa, and 0.05MPa. The result shows that the increased damping leads to a substantial decrease in oscillation with increasing pressure for the non-perforated structure. Compared with the perforated pad, there is a much larger damping force acts on the non-perforated surface, and an obvious decrease in damping force with increasing pressure.
Study of Electro-Hydraulic Force Servo System Based on Flow Press Servo Valve and Neural Network Intelligent Control Strategy
Authors: Li Jian Ying , Yang Tian Ye , Wang Yan Wei , Mao Zhi Yong , Wu Li Gang
Published: September 2013

The flow press servo valve has very special work principle, and it now is widely used in the electro-hydraulic force servo system as main and kernel part. According to its special work principle, electromagnetic basic theory and the flow continuity equation, the mechanics analysis of every main part of the flow press servo valve was finished; the author built the mathematic model of the flow press sever valve. During the process of building model, the author took into account the load torque on the torque motor keeper and the total load torque of torque motor. On the other hand, the neural network intelligent control strategy was used in the force servo system to improve the whole system performance. The mathematic model of the electro-hydraulic force servo system controlled by the flow press servo valve with the neural network control strategy was built. The simulation curves and the experiment curves were accord compared by system simulation and experiment results, so we can know also that the mathematic model of the flow press sever valve and the electro-hydraulic force servo system controlled by this kind of valve with the neural network intelligent control strategy are correct.
The Void-Identify Method of Penetration Fuze Based on Timing Control
Authors: Liu Heng , Li Shi Zhong , Li Jun Feng
Published: September 2013

The detonating control method of Void-identify is one of the main methods in penetration ammunition detonating control. But during the process of penetration, the accelerometer in penetration ammunition will receives many interference signal so that affects the accurate burst control. Aiming to the problems of void-identify and anti-jamming in penetration process, the paper proposes a method to identify void and eliminates double-void interference by using the high-g accelerometer and Timer, and through comparing the range and duration of G. The system can controls the burst point accurately by Matlab simulating.
Two Isomorphic 9 Order Steiner Triple Systems Large Sets
Authors: Xu Zhao Di , Li Xiao Yi , Chou Wan Xi
Published: September 2013

This paper Clarifies the basic ideas of constructing the v order Steiner triple systems. This paper proposed the construction method of pairwise disjoint sets s(i)(v) for Steiner triple systems based on the initial block permutation matrix. And a method of initial block permutation matrix is given. This paper also introduced the entire construction process of two isomorphic 9 order Steiner triple systems large set. At last, this paper proved the number of pairwise disjoint forsi(9)is d(9)=7 .
Small Sample Competing Failure Model of Cylinder Liners in Diesel Engines
Authors: Ma Qu Li , Yang Jian Jun , Liu Yi
Published: September 2013

In order to deal with the small sample problem in practical reliability analysis of the diesel engine cylinder liner, the method and the steps of using support vector machine to build a regression prediction model to eventually develop the competing failure model of diesel engine cylinder liner are proposed. As proposed, more samples are generated by use of the regression prediction model and the quasi maximum likelihood method is used to separately estimate the occurring patterns of two failure models, including abrasion deterioration and pyrolysis. The scientificity and effectiveness of this method was demonstrated through calculation of examples and comparison of results.
Study on the Performance of DBPSK Communication System
Authors: He Hong Gang , Fu Hai Yang
Published: September 2013

Focused on the communication system of differentially encoded binary phase-shift keying (DBPSK/2DPSK), this paper studies on the influences of inter symbol interferences (ISI) on the bit error rate (BER) performance and derives the BER expression that is applicable for arbitrary sending probabilities of binary symbols using the knowledge of integration and probability theory, which is then demonstrated to be correct by the Monte Caro simulation method.
A Folded Dual-Band Monopole Antenna for RFID System
Authors: Yu Yan Zhong , Li Yan Fei , Chen Lin
Published: September 2013

A folded dual-band monopole antenna for 2.45 GHz and 5.8 GHz RFID tag applications is proposed in the present paper. It is formed by two folded monopole antennas for reducing the geometric size of the tag. One of them operates at 2.45 GHz, and the other operates at 5.8 GHz. The input impedance of the proposed antenna is designed to be conjugate matched to the chip impedance for the maximum power transfer. This antenna is modeled, analyzed, and optimized by HFSS. The simulation results demonstrate that the performances of the proposed antenna can satisfy the requirements of RFID system. The characteristics of the proposed antenna are simple structure, low cost, and small sizes.
Study on Data Fusion Algorithm of TCAS/ADS-B Integrated Surveillance System Based on the Present Statistical Model
Authors: Xu Ya Jun
Published: September 2013

The difference between Traffic Alert and Collision Avoidance System and Automatic Dependent Surveillance Broadcast surveillance principle was compared. A TCAS/ ADS-B integrated surveillance system based on the present statistical model was built. Using the data fusion algorithm, the optimal local track of TCAS and ADS-B ,as well as the optimal fused track of the integrated system were estimated. The simulation results show that the maximum optimal fused estimated position error is 100m, it is certificated that the integrated system can improve track estimates accuracy, improve the surveillance precision of TCAS.
Stability of Discrete-Time Switched Linear Systems with Saturation Arithmetic
Authors: Zhang Meng Hua , Cheng Xin Gong , Zong Xi Ju
Published: September 2013

This paper addresses a strategy for the stability of discrete-time switched linear systems with saturation arithmetic. It is of closed-loop nature and is designed from the solution of what we called Lyapunov-Metzler inequalities from which the stability condition is expressed. The theoretical results are illustrated by means of examples.
Research Based on State Monitoring of CNC Machine Tools Intelligent Security System
Authors: Shi Rong Bo , Guo Zhi Ping , Song Zhi Yong
Published: September 2013

Analyse the cause of fault in CNC Machine, research the corresponding solve scheme, and to realize the state can monitor equipment operation, improve equipment reliability, the development set of machine condition monitoring, fault warning, fault diagnosis and troubleshooting as one of the intelligent security system. Based on the CNC machine intelligence support system research, design, introduces the key technologies and methods. Screw lift state of motion monitoring, for example, trend analysis exercise state, intelligent fault diagnosis, in order to achieve protection of the intelligent CNC machine tools to verify the practicality of intelligent security systems.
The Research of Magnetic Track Brake System
Authors: Pei Yu Chun
Published: September 2013

This paper introduces the braking system scheme of low floor light rail vehicle, applying the regenerative braking and magnetic track brake, realizes service braking, emergency braking, parking brake and holding brake, also adjusts the braking force according to the load change.
Development of a Vehicle Dynamics Control System for Four In-Wheel Motor EV
Authors: Xiong Lu , Shi Fen Miao , Hu Shen Lin , Feng Yuan
Published: September 2013

This paper describes the design of a vehicle dynamics control system for improving handling and stability of electric vehicle. A vehicle with this control system can facilitate good handling performance under normal operating conditions and enhance stability under critical conditions. A feedforward and a feedback controllers are employed to make the vehicle follow the reference yaw rate based on a non-linear 5DOF vehicle model under normal operating conditions. When the tire tends to reach physical limit, the reference value will be modified with lateral acceleration feedback. Finally, simulation is conducted under several standard maneuvers and the results verify the effectiveness of the proposed control system.
A Low Power Consumption and Energy Saving Solution Applied in Network Management
Authors: Chen Peng , Zhang Yang An , Yuan Xue Guang
Published: September 2013

As the scale of network become larger and larger together with node numbers, the traditional way to manage the network becoming more and more energy-wasting. In order to improve the performance of the network equipment, we figured out a method that can reduce CPU scheduled frequency thus resulting in a decrease in power consumption.
Experimental Analysis of Concrete Members Reinforced by Paste Method in the Fire
Authors: Fu Su Juan , Fu Shi Feng , Liu Jian Zhong , Li Yan Bo
Published: September 2013

The fire resistance rating of concrete members coated with different thickness of fire-resistant coating was analyzed by experiment in the fire. Studies showed that the impact of CFRP and steel on the temperature field of the specimens was same, the fireproof effect of thick-layer fire-resistant coating for steel structure was obvious, the thickness of the fire-resistant coating and the fire performance are not proportional. It was identified that the best value of the thickness of fire-resistant coating is 40mm, and it provided the basis for fire protection design of reinforced concrete members after reinforcement.
The Innovation of National Smart Grid Based on the Engineering Theory of Service
Authors: Zhang Hai Yan , Zhang Tao , Cheng Min Sha
Published: September 2013

With the rapid development of global electricity, our country has to study the smart grid in the background of the global development. We study the innovation of smart grid based on the engineering theory of service, and hope to provide a reference for smart grid research and the future development of the grid. Therefore, our country can adapt to the future development direction of the global market and service economy led.
Control Model of Production Process Based on Petri Net for Large-Scale and Complex Products
Authors: Xu Jian Ping , Luo Yu
Published: September 2013

Based on analysis the production characteristics of large-scale and complex products and the effects of materials and production capacity on production planning, this paper proposes a control model of large-scale and complex products production process based on Petri network associated with final assembly schedule (FAS). The model thinks about the requirement of materials and production capacity related to FAS, then we can trigger the relevant assembly operations if the state of resource place is able to match the weight of resource place operation. Through the application of Petri network control model, the effectiveness of production process control and decision-making and the feasibility of production planning are increased, at the same time manufacturing resources can be used effectively and well-balanced.
Theoretical Analysis of Non-Destructive Integrity Test in the Pile with Cap Based on Low Strain Reflected Wave Method
Authors: Liu Pei Ge , Zhao Ran , Ying Zong Quan , Su Lin Wang
Published: September 2013

This paper analyzes the propagation characteristics of stress wave in the cap-pile system. Based on reflected wave method, the propagation velocity-time curve of stress wave in the defective pile with cap is calculated theoretically. Then the calculation result shows that the waveform curve by theoretical analysis is consistent with the defect location and pile position, and the waveform curve well reflects the propagation characteristics of waves in the pipe with cap. Finally the theoretical analysis method is used to assist the field testing, and compared with the test result to describe the integrity status of pile.