bluuebunny/crossref_metadata_2025 huggingface dataset:
Electromagnetic Interference Shielding Properties of Silver-Plated Polyester Fabric
Authors: Jiao Ming Li , Wang Shuang Hua , Zhang Wang Xi
Published: December 2012

Over the last two decades, the electromagnetic radiation is becoming the fourth public pollution in addition to the noise, water and air pollution. Here, we had studied the structure and the electromagnetic properties of machine-knitted fabric coated with silver by means of microscopy and shielding effectiveness in the open space. The silver-plated polyester fabric showed a different shielding effectiveness of electromagnetic wave in the open space compared with enclosed space. The value of SE had closed relation with transmitting and receiving distance except the theory factor. When the frequency dropped below 900 MHz, the value SE usually became negative.
Constitutive Relationship of 3A21 Aluminium Alloy Tube for Magnetic Pulse Forming
Authors: Xu Zhi Dan , Cui Jun Jia , Yu Hai Ping , Li Chun Feng
Published: December 2012

In this work, Split Hopkinson Pressure Bar (SHPB) was employed to test the material properties dynamic forming. The stress-strain curves and dynamic yield strengths under variable strain rates were obtained. Constitutive equation of 3A21 aluminium alloy was formulated by Johnson-Cook model and then, it was applied to simulate the forming behavior of 3A21 aluminum alloy tube under dynamic state by software Ansys/ls-dyna. The results show that, for magnetic pulse forming process, the simulating results well corresponded with those of experiments that demonstrate the constitutive equation established present good accuracy.
The Building Waterproof Test and Inspection Based on IRT Technology
Authors: Xia Yan Chun
Published: December 2012

In order to test the building waterproof related problems during the transition period, an evaluating inspection by means of predictive maintenance method applying Infrared Thermography (IRT) technology is executed in the paper. The restriction of ongoing, leakage background and its history, possibility of problems and areas and potential issues may face were discussed and mainly made full use of the capability of IRT to find potential problems that human eyes cannot easily see and confirm where not certain by site visual inspection.
Rapid Detection of Avian Influenza Virus Using Immunomagnetic Separation and Impedance Measurement
Authors: Yan Xiao Fei , Wang Mao Hua , Wen Xin Hua , An Dong
Published: December 2012

An interdigitated array microelectrodes (IDAMs) based impedance biosensor in combination with immunomagnetic separation was developed for rapid detection of avian influenza virus (AIV) subtype H5. Streptavidin-coated magnetic nanobeads were immobilized onto the biotin-labeled anti-H5 monoclonal antibodies to capture AIV H5 (e.g., H5N1) from sample solutions by the specific immunoreaction and form antibodies coated nanobeads-AIV complexes. Then these complexes were separated and concentrated by a magnetic field and the impedance magnitude was measured by IDAMs in a frequency range from 20 Hz to 1 MHz. The sensitivity and specificity of this biosensor were investigated. The biosensor could detect as few as 2-1 HA unit/50 μl of inactivated AIV H5N1. A linear relationship between the change of impedance magnitude and the logarithmic value of AIV H5N1 concentration was found in the range of 2-1 to 24 HA unit/50 μl. Non-target viruses, such as AIV subtype H1 and Newcastle disease virus, could not induce detectable signals. Equivalent circuit analysis showed that the medium resistance was responsible for the impedance change caused by the presence of AIV H5N1. The whole detection process from sampling to impedance measurement was able to be completed within 1.5 h.
Design of a Current Source for Bioelectrical Impedance Measurement
Authors: Wang Ke Ning , Zhao Heng , Wang Wei
Published: December 2012

Current source with high output impedance is a key part in bioelectrical impedance measurement. In this paper, we presented a design of a current source based on the improved Howland current pump circuit. Then the performance of the proposed current source was simulated in Multisim software. The designed current source was implemented and its output impedance was tested. Both the simulated and tested results show that the proposed current source is a good choice for BI measurement.
Design of a Bioelectrical Impedance Spectrometer Based on AD5933
Authors: Wang Ke Ning , Zhao Heng , Wang Wei
Published: December 2012

This paper designed a bioelectrical impedance spectroscopy (BIS) measurement system based on the integrated impedance converter AD5933. The working principle of the AD5933 was briefly introduced, and a bipolar BIS measurement device was designed. The AD5933 can be controlled by MCU STC89LE516AD through an I2C bus. The software of the BIS device was written in C51 language and provides a friendly human-machine interface. Preliminary experiment showed that the impedance measurement error at different frequencies is less than 3% and found that the measurement accuracy is relatively high for larger resistor.
Composition and Experiment Analysis of an Impedance Analyzer Based on LabVIEW
Authors: Zhang Zheng , Liao Yi Hua , Zhang Tie Min , Ou Jun Guan
Published: December 2012

With wide range applications of piezoelectric ceramics, its performance parameters test possesses an important role in electronic measuring industry. This paper describes the principles and methods of piezoelectric ceramic performance, parameters testing as well as various impedance analyses. An impedance analysis hardware system based on LabVIEW is designed application of USB-6251 board to realize the acquisition and process of the simulation signal. Experiment in this study shows that the impedance analysis hardware system based on LabVIEW has the characteristics of practicality, stability, reliability, easy to install and upgrade in measurement of piezoelectric ceramic.
Identify on Acoustic Emission Signals of Tank Bottom Corrosion Using Hidden Markov Model
Authors: Yu Yang , Zhang Ming Yu
Published: December 2012

Aiming at the acoustic emission signals of oil storage tank bottom injured, hidden Markov algorithm is proposed to identify the tank bottom corrosion signal. Typical corrosion acoustic emission signal is divided into transient acoustic signal, continuous acoustic emission signal and mixed acoustic emission.Baum-Welch algorithm is used to train these typical corrosion acoustic emission signals model, then establish HMM model library. The forward-backward algorithm is used to compute each acoustic emission model’s output probability. The simulation experiments shows that the hidden Markov algorithm can correctly identified the acoustic emission signals.
Identification for the Active Noise Control System Based on Neural Network
Authors: Wang Bing
Published: December 2012

This paper mainly explore application of neural network on self-adaptation system. An framework model of self-adaptation based on theory of artificial network. An active silencing control system is made which adopts a motional feedback loudspeaker as not a noise controlling source but a detecting sensor. The working fundamentals and the characteristics of the motional feedback loudspeaker are analyzed in detail. By analyzing each sound channel, identification of neural network is made. This kind of identifying method can be achieved conveniently, and it wouldn’t bring distribution to working environment. The estimated result of each sound channel matches well with its real sound character, respectively.
Study on the Use of Blind ICA in Diesel Engine Vibration Processing
Authors: Huang Chao Ming , Zhang Ping , Yu Hong Liang
Published: December 2012

A method which can be used to analyze and separate the vibration signals of diesel engine is proposed. The vibration signals contain a great deal of information about the engine’s fault state, and it is hard to obtain the fault characteristic parameters because of the complex mechanical movement and operating conditions. Study on vibration by fourth order blind identification is carried out in this paper. And FOBI model that estimate the separation matrix by independent component analysis is established and applied to diesel engine vibration to separate the different signals. The results show that signals of different characteristics can be separated perfectly. This method can be used as the pre-processing step to obtain the fault characteristic parameters.
Experimental Research on the Vibration and Noise Characteristics of the Marine Diesel Engine Turbocharger
Authors: Wen Hua Bing , Xia Zhao Wang , Wang Kang Le
Published: December 2012

An experimental study on the spectrum analysis and sound intensity identification of vibration and noise source was carried out. The study result represents that the primary reasons leading to the volute vibration of turbocharger, whose vibration energy focus on the frequency range of 0~8Kz, are the volute internal rotor shaft frequency of compressor and its harmonic vibration excitation and rotating unsteady air flow excitation. The volute radiation noise is primarily produced by the structural vibration caused by tip clearance noise and rotor shaft frequency and its harmonics. The noise energy of the turbocharger distributes at a wide range of 1k~8kHz and the sound power almost increases linearly with its rotating speed, which increases by about 20dB as the rotating speed increased from 50% to rated speed.
Analysis of Adaptive Detection Threshold for High Sensitivity Compass Navigation Receiver
Authors: Xiang Wei , Ni Shao Jie , Wu Wei , Wang Fei Xue
Published: December 2012

Compared with fixed detection threshold, adaptive detection threshold substantially improves the reception sensitivities in high sensitivity receivers. The optimal detection threshold depends on probability distribution of the received signals. The out-of-phase auto correlation values and cross correlation values of Chinese Compass B1-I signal were analyzed, and the probability distribution of the signal with the differential correlation technique was provided. Then the optimal detection threshold and the sensitivity gain that can be obtained by the adaptive detection threshold were provided.
Improving the Error Model for POS Applicationto Airborne InSAR
Authors: Chen Lin Zhou Ting , Fang Jian Cheng
Published: December 2012

Position and Orientation System (POS) is a technology widely used for motional error compensation of airborne InSAR. The measurement errors of inertial sensor (accelerometers and gyros) are the chief influencing factors to the precision of POS. In order to enhance the accuracy of POS, an improved SINS error model should be used in POS. In this paper, a more precise error model for SINS is developed by augmenting random walks error, first-order Markov process error, scale factor error and installation error. To validate the accuracy of the improved error model, semi physical flight simulation based on the imitation of imaging-flight route of InSAR is made to compare with the traditional SINS error model which only considering the random constant error. The simulation results show that the accuracy of the improved SINS error model is one order higher than the traditional SINS error model.
Spatial and Temporal Analysis of Pit Deformation Monitoring Based on GIS
Authors: Lu Zhi Gang , Zhang Jian Dong
Published: December 2012

Spatial and temporal evolution of Pit deformation is the key issues of safety monitoring. Combined with GIS software and Vertical Mapper extension module, it used monitoring data and Kriging spatial interpolation method to generate the grid file and create digital subsidence model and draw subsidence contour and subsidence of section line, and time-effect and spatial effect analysis are realized in it. It reveals the spatial and temporal evolution of pit subsidence, and plays an important guiding significance to the security monitoring and early warning of pit.
Optimization Analysis of GDOP of PL-Aided Navigation and Positioning System
Authors: Gong Chang Qing , Jiang Zhen Chun , Huang Chao Hui , Wang Ping , Wu Tong
Published: December 2012

The precision of satellite positioning system depends largely on the numbers and geometric layout of the positioning satellite, the GDOP is one of the important parameters to measure the geometric layout of positioning satellites. From the perspective of GDOP, the relation between a different pseudo-satellite location and layout for the accuracy of the positioning system has been studied. For the positioning of the four pseudo-satellites, the simulation analysis of the relationship of the GDOP parameter changes with the pseudo-satellite longitude, latitude and location of the user. Studies have shown that different latitudes, the symmetrical distribution of the pseudo-satellite layout has good geometric accuracy; the same layout, the low-latitude, GDOP is less than the high-latitude; when the user moves in the regional variation in the geometric center of the pseudo-satellite layout, the GDOP values did not change and less than the value of the central region; at the same time, increasing the number of pseudo-satellite can reduce the GDOP value.
A Universal Parallel Framework For Remote Sensing Process
Authors: Cai Xing Wen , Hu Jian , Li Zi Yang , Zhu Bo
Published: December 2012

Parallel computing technology has been widely used to process massive remote sensing data high efficiently. In order to simplify the development of remote sensing data parallel processing system and consider about the characteristics of remote sensing data pre-processing, this paper designs a cluster-based universal parallel processing framework. The framework encapsulates parallel job scheduling and management, adapts the strategy of components development, provides the simple interface for the users to develop new functionalities by adding new data-processing components into the framework. Basing on Message Passing Interface (MPI), the framework is implemented. Experiments, such as adding remote sensing data extracting, radiometric correction and geometric correction into the framework, show that the framework performed well in computing efficiency and speedup rate.
Analysis on Measurement Errors of Critical Dimensions of HSK Cone and its Application
Authors: Chen Wen Hua , Wang Shu Lin , You Rui Hua
Published: December 2012

The manufacture and assembly accuracy of the HSK taper inspection gauge directly influences the measurement precision. Take the large taper measuring head of the HSK-A63 taper inspection gauge as the research object, analyzed the measurement errors caused by its mounting position deviations, obtained corresponding formulas. Based on the structure of the inspection gauge and the moderate accuracy required by machinery manufacture and mechanical assembly, assigned value for each parameter, and the specific measurement errors were calculated. Guiding suggestions for the manufacture and assembly of the HSK taper inspection gauge were proposed.
Dynamic Position Detection Method for Large-Diameter Rotary Shaft Based on MIFA-AFKF
Authors: Feng Xin , Gu Wen Tao , Lei Shao Kun , Zhou Shao Wei
Published: December 2012

The dynamic position variables of large-diameter rotary shaft are not easy to measure precisely or cheaply, however, the accuracy of dynamic position is of great significance to the movement controlling of key rotary shaft. In this paper, a novel real-time detection method is presented, which can be used to estimate the dynamic position of the large-diameter rotary shaft rotating with constant velocity, constant acceleration or variable acceleration. In order to estimate the position variables, multi-sensor information fusion algorithm based on adaptive fading Kalman filter (MIFA-AFKF), which combines conventional information fusion algorithm with an adaptive fading factor, is proposed to fuse multi grating-sensor information. The method based on MIFA-AFKF is demonstrated by Monte Carlo simulation, and also used to measure the angle position of the hollow shaft at the machine head and machine tail of a horizontal riveting machine. The two results show that the algorithm can significantly improve the dynamic position accuracy.
Applying an Improving Measurement of Cutting Force to Study Machinability of Gray Cast Iron
Authors: Wu Rui , Zhang Dan Wen , Sun Juan , Ren Feng Zhang , Wang Yu Fei , Xiao Li Li
Published: December 2012

In order to study the machinability of gray cast iron, the cutting force must be precision measure. An improving measurement based on strain gauge dynamometer has been proposed in this paper, the measurement changed the traditional calibration method of strain gauge dynamometer. A set of new calibration device have been designed. Use the device, the process of calibration could be made after the strain-gauge dynamometer for cutting force measuring fixed on lathe, in this way, the states of calibration and measuring in experiment achieved same, and the error of measuring which had been begot by the differ states of calibration and measuring could be eliminated. The results of experiment show that the method presented in this paper achieved high precision and low cost cutting force measuring, and the results of cutting force measuring could be used for estimating machinability of gray cast iron.
Drilling-Hole-Loading Method for Measuring Tensile Strength of Irregular Small Stones
Authors: Chen Jin , Liu Ming , Liu Jie Min
Published: December 2012

Drilling-Hole-Loading method is applied to predicting and measuring the tensile strength of irregular small-size stones. According to this method, a circular-hole must be drilled at the center of the irregular small-size stone. The mechanical model of the stone with a circular-hole and subjected to a pair of equivalent collinear pull forces is set up. The normal stress strain distributions on the critical section are anlyzed. Theoretical stress concentrated factor equation related to the hole diameter is calculated. Based on the static equilibrium theory, the theoretical formula of predicting the tensile strength of irregular small-size stones is established. Based on the theoretical formula, the test device for measurement of the tensile strength of the stone was designed. The tensile strength of a kind of bluestone was measured. The results show that the tensile strength predicted by Drilling-Hole-Loading method is a little lower than that of the standard specimen of stone without hole. Drilling-Hole-Loading method can be used to predict the tensile strength of brittle material and irregular small-size stones.
The Highway Bridge Load Subentry Coefficient and Their Combination Effect Comparative Analysis
Authors: Dang Dong , Sun Jing
Published: December 2012

This paper takes the short and medium span bridges as examples to evaluate position of Chinese load effect partial safety factors and their combination effect. First, to get the new partial safety factors of vehicle load effects, this paper conducted a survey of the short and medium span bridges ,distinguished the similarities and differences between the standard in highway bridges from different countries and confirmed the reasonable position of Chinese standard in the world.
Multi-Axle Moving Train Loads Identification on Continuous Bridge from Bridge Displacement Responses
Authors: Wang Yi , Luo Cong Shuang
Published: December 2012

A new method for multi-axle moving train loads identification on continuous bridge is presented in this paper. In order to improve the accuracy and efficiency for moving loads identification, both cubic spline interpolation technique and dynamic displacement influence line technique were employed. The time history displacements of the measurement stations under unit force were calculated with cubic spline interpolation technique based on the finite element model of the bridge. The dynamic displacement influence line was obtained to be used for identifying the moving train loads with simulated annealing genetic algorithm by minimizing the errors between the measured displacements and the reconstructed displacements from the moving train loads. A series of comparative studies were carried out to investigate effects of different span numbers with the same length, different length with the same span number and measurement noise on the proposed method. The result shows that the proposed method is an accurate and efficient method for multi-axle moving train loads identification on continuous bridge.
Establishment of Digital Human Head Model Coordinate System Based on Mean Curvature Analysis
Authors: Han Qiang , Ouyang Jian Fei , Ma Xiang , Yan Yong Gang
Published: December 2012

The human body model scanned by a structured light scanner is based on the scan coordinate system. Since the structured light scanner is not fixed, when the scanner scanning human body in different position, we can get several models, the coordinates of the same point on these models are not the same. In order to solve this problem, we propose a method. We extract facial feature points with the use of mean curvature analysis. The feature points are used to determine the digital human head model coordinate system. We can convert the human head models from the scan coordinate system to the digital human head model coordinate system. After the conversion, the coordinates of a same point on different models are approximately the same, which can make the use of scanner more efficiency and user-friendliness.
The Study of Using Ultrasonic Sensors to Detect Degradation Characteristics of the Ferrite Core
Authors: Sung Min Suk , Lee Su Ho , Park Jae Hyun , Lee Kwon Soon
Published: December 2012

Ferrite cores are used in the manufacture of various electrical and electronic equipment. Thereby, ferrite degradation also occurs in various forms. In this paper, the characteristics of the degradation of ferrite cores are studied and the changes in amplitude are analyzed after subjecting specimens to artificial thermal shock. In this paper, two probes were used in direct contact penetrant method applying longitudinal waves and the change in amplitude was confirmed.
Measurement of Semiconductor Silicon Wafer’s Doping Concentration and it’s Uniformity Based on Thermo-Needles Method
Authors: Wang Qiao Liang , Zhao Yu , Lv Rui Feng , Zhu Yan Yan
Published: December 2012

In semiconductor industry, carrier concentration of a semiconductor material needs to be measured. Theoretical computation is complex and has its limitation. Experiment measurement always needs complicated and expensive instruments. Here, a new method for measuring the carrier concentration of silicon wafer was put forward. The dependen curve of thermoelectromotive force on temperature was graphed. The results showed that when temperature is below 460K, thermoelectromotive force is proportional to temperature of the hot probe. With the help of Origin software, slope of curve was obtained.Accoeding to related formula,the doping concentartion and it’s uniformity were figured out finally .Compared with other similar methods, this method is more simplified and thet equipment is cheaper.
Study on Method for Test Points Selection under Uncertainty Based on MBQPSO
Authors: Sun Jian , Sun Qin Lei , Huang Kao Li , Xie Ying , Li Hong Ru
Published: December 2012

Test points choosing are the beginning of optimization of design for testability. With the consideration of uncertain influences on the tests of electronic equipment, the model for design for testability was proposed based on hybrid diagnosis modified by Bayesian network. Based on the new model, the algorithm of MBQPSO was proposed, which could take use of multi-dimension searching mechanism to choose test points according to uncertain correlation matrix between failure modes and tests. With the experiment, the result of this proposed method is closer to the reality and can provide better guidance for future design for testability.
Data Acquisition System Design and Data Analysis on Automatic Transmission
Authors: Li Yan Qin , Li Chun Fu
Published: December 2012

An efficient data acquisition system for electronic automatic transmission test, which makes use of American NI’s data acquisition card, is designed based on Virtual Instrument. The data can be collected by the data acquisition system include automatic transmission oil pressure, solenoid duty, as well as engine speed ，turbine speed ，output shaft speed and throttle degree，and so on. The key problems of the system design are measurement method of automatic transmission solenoid duty, signal conditioning circuit design and multi-signal acquisition synchronization. Test platform is North-Benz dump truck 2627K (Its power-train assembly is replaced), of which transmission and engine use respectively HD4070PR electronic automatic transmission and BF6M1015CP electronic diesel engine. The automatic transmission shift control strategy and oil pressure characteristics of clutch or brake etc can be analyzed through test data acquisition.
An Efficient Data Acquisition System for Automatic Transmission
Authors: Li Chun Fu , Li Yan Qin
Published: December 2012

A data acquisition system for electronic automatic transmission test, which makes use of American NI’s data acquisition card, is designed based on Virtual Instrument. The data can be collected by the data acquisition system include automatic transmission oil pressure, solenoid duty, as well as speed of turbine and output shaft of transmission and throttle degree of engine and so on. The key problems of the system design are measurement method of automatic transmission solenoid duty, signal conditioning circuit design and how to improve sampling rate of the system. Test platform is of a armored vehicle which has equipped a high-power electronic automatic transmission. The automatic transmission shift control strategy and characteristics of throttle oil pressure etc can be obtained through test data acquisition.
Data Acquisition and High Speed Storage by FPGA Implementation in the Quadrupole Mass Spectrometry
Authors: Gao Yin Han , Zhou Jing , Wang Wei , Wu Bao Jun
Published: December 2012

A design method of data acquisition and data storage buffer control logic in the quadrupole mass spectrometry was proposed. The control logic builds a high-speed built-in FIFO memory on FPGA to buffer of mass spectrometry data. FIFO storage capacity of 16K bytes and simultaneous reading and writing speed of 60Mbps were realized by control logic system. The data acquisition and storage buffer system had been used on the Quadrupole Mass Spectrometry and Quadrupole Ion Trap Mass Spectrometry to reduce the single scanning time of MS analysis. A higher sensitivity had been obtained by increasing the scanning rate of mass spectrometer.
Template Based Table Document Recognition
Authors: Jia Jing Ping
Published: December 2012

In this paper we proposed an effective but simple table recognition algorithm in the OCR field. First a binary image template is built for the tables to be recognized, which consists of all the lines describing the table cells we are interested in. Then the images to be analyzed are thresholded and deskewed. Vertical and horizontal lines are extracted from the preprocessed image to form a table “scene”. Finally the binary image template is aligned to the table “scene” by minimizing their Hausdorff distance. From the alignment the image regions of interest corresponding to the table cells are extracted for further recognition task. Experiments show that the proposed method with the template can cope with many low quality images and achieve good recognition results.
An Image Tracking Method Based on Color Co-Occurrence Histograms
Authors: Wang Wei , Wang Chun Ping , Fu Qiang
Published: December 2012

Aiming at the result of Mean-Shift tracking method is not satisfactory when color of the target is similar to the back ground or another similar object is close to the target, a real- time target tracking method combined with Mean shift and color co-occurrence histograms (CCH) was proposed in this paper. The method used CCH to represent target model of the Mean-Shift. And then the Mean-Shift was used to locate the target position. Moreover, the studied model updating strategy based on multi-scale CCH and the similarity measure of Bhattacharyya value is constructed in the method. Experiments in the complex environment were done. The results show that the proposed method has more accurate target locating and better robustness than the traditional Mean-Shift.
Research on the Relationship between the Depth-Movement of the Stereoscopic HDTV and Visual Comfort
Authors: Yu Jia Xi
Published: December 2012

Visual comfort is an important factor that should be considered in the production of stereoscopic HDTV programs. This paper reports the result of recent researches on the relationship between visual comfort and the depth-movements, and analyses the experimental results in terms of the principle of vergence-accommodation conflict. The analysis result indicates that the depth-movements will cause viewers’ visual discomfort and fatigue, especially when the depth-movement range is large and the speed is fast. The research result is of significance to reach a balance between the realistic stereoscopic visual effects and visual comfort.
An Investigation of the Fatigue Property of Ultra-High Strength Mould Steel at 130 Hz and 20 kHz
Authors: Peng Wen Jie , Yu Li , Long Hui Cai , Xue Huan , Kuang Lan Xiang , Qiu Bao Wen
Published: December 2012

In this paper, the fatigue property of ultra-high strength mould steel is investigated. The fatigue specimen is designed particularly due to the ultra-high strength. Fatigue tests are conduced using ultrasonic and conventional fatigue testing machines respectively. The same geometry and size of the ultrasonic fatigue specimens and conventional fatigue specimens are adopted to overcome the size effects. The test results are compared to investigate the frequency effect.
Multivariate Shrinkage for Image Denoising in Shearlet Domain
Authors: Deng Cheng Zhi
Published: December 2012

A new multivariate threshold function for image denoising in the shearlet transfrom is proposed. The new threshod exploits a multivariate normal inverse gaussian probability density function to model neighboring shearlet coefficients. Under this prior, a multivariate Bayesian shearlet estimator is derived by using the maximum a posteriori rule. Experimental results show that the new method achieves state-of-art performance in terms of peak signal-to-noise ratio (PSNR), structural similarity (SSIM) index and visual quality than existing shearlet-based image denoising methods.
Clustering Algorithm for Heterogeneous Sensor Network Based on Energy Matrix
Authors: Dang Xiao Chao , Hao Zhan Jun
Published: December 2012

Aiming at the energy heterogeneous wireless sensor network, this paper proposes This paper proposes the remaining energy prediction model based on energy matrix and a novel clustering algorithm .The Kalman filtering algorithm was introduced into the model, in which a node , according to energy prediction mechanism , independently makes it s decision to compete for becoming a master cluster head in order to improve energy efficiency. Simulation results show that the algorithm can balance the network energy consumption, improve the utilization efficiency of node energy and prolong the network lifetime.
Analysis of Sensitivity and Linearity of SiGe MEMS Piezoresistive Pressure Sensor
Authors: Shaby S.Maflin , Juliet A. Vimala
Published: December 2012

In this paper a surface micromachined MEMS Piezoresistive pressure sensor was designed. A simulation programs were developed to predict the sensitivity and linearity behavior of the piezoresistive pressure sensor. Based on the small and large deflection theory the diaphragm performances were analyzed. Different diaphragm shape, pressure range, placement of resistors and the properties of the resistors were considered during the analysis. The output response of the pressure sensor was also found as a function of temperature and pressure. It was found that silicon germanium gave better sensitivity and less linearity error. The analysis showed that sensitivity and linearity are influenced by diaphragm thickness and length of the sensing resistor used in the diaphragm of the Piezoresistive pressure sensor. It was found that the sensitivity of 5.2mV/V can be achieved for silicon germanium
Research and Improvement about LEACH Routing Protocol for Wireless Sensor Networks
Authors: Wang Li , Zhu Qi Lin
Published: December 2012

In recent years, as the development of wireless sensor network, people do some deep researches on cluster-based protocol, most around the prolongation of the lifetime of WSN and decline of energy consumed by the sensors. This paper analyses of classical clustering routing protocol based on LEACH, aiming at the node energy foot presents energy improved clustering routing algorithm, the random cluster head selection algorithm of threshold to be changed, lowering the threshold, in the original threshold increases the node's remaining energy factor, reduces the communication load of cluster nodes, and simulation. The simulation results show that the LEACH-E improved algorithm, energy saving, reducing balance node energy consumption, effectively prolongs the network lifetime.
Ant-Colony-Based Geographic and Energy Balance Routing for Sensor Networks
Authors: Xiao Jin Chao , Zeng Peng , Zhang Hua Liang , Li Dong
Published: December 2012

Recent advances in wireless sensor networks (WSNs) now witness the increased interest in the potential use in applications. Sensors are expected to be remotely deployed in large numbers and operate autonomously in unattended environments. In this paper, Ant-colony-based Geographic and Energy Balance Routing (AGEBR) was utilized to establish wireless sensor networks which had survival cycles. This Ant-colony-based routing can modify the geographic information based on the distribution characteristics of the ant colony algorithm, and finally achieve fast convergence and high efficiency. As a result, the sensor networks which did not have lasting energy supplement or only had limited energy complement could last a longer period without losing their sensing ability. Experimental results demonstrated that the proposed approach can keep balance of the network energy consumption, prolong the network lifetime, and enhance the successful sending rate without congestion.
Analysis on EPS Machitrical Dual Closed-Loop Control System
Authors: Wei Wan Ying , Chen Jin Ying , Xie Gang
Published: December 2012

The electric power steering system (EPS) is a combination of mechanical and electrical control system. EPS’control strategy used commonly has two kinds: current PID control and fuzzy control .The current PID control based on the difference between target current and feedback current is a curren closed-loop control system and the fuzzy control is a mechanical closed-loop control system based on the difference between forces of the upper part and the lower part of the steering shaft . Taking the margin of the mechanical and electrical closed-loop control system, this paper, a torque feedback loop for the outer ring, a current feedback loop as the inner loop, designed a dual-loop control system, the output of the fuzzy control determined a target current, and then proceed to current PID control, fast-track the target torque. The simulation shows the dual closed-loop fuzzy PID control is superior to two commonly used control strategies so that electric power steering system has a better tracking ability and stability.
The Application of Fuzzy Smith-PID Controller in Coupled-Tank Liquid-Level Control System
Authors: Li Liang , Yong Zhang , Ai-Lian Li
Published: December 2012

To resolve the problem of lumping lag and nonlinear of the coupled-tank liquid-level control system , a fuzzy Smith- PID control approach is researched. In this approach, the characteristic of the control system is analyzed，the fuzzy Smith- PID controller is designed. In kingview, the monitoring interface is designed, and the Liquid-level control system is practiced.The result shows that this method is rationality and feasibility.
Water Consumption Analysis System Based on Data Mining
Authors: Wen Ya Yuan , Huang Wen Ming , Wu Jie , Chen Yue , Song Ji Qing
Published: December 2012

As knowledge discovery in databases, data mining means a process of extraction potentially useful information from data in databases, which can be applied to information management, query processing, decision making, process control etc. Those are urgently needed to improve efficient management in water supply industry, since water has been recognized by governments worldwide as a scarce resource. In response to such demand, this paper proposes a software application, which designed to accessing to database, operating the data mining, and output the results and charts. We analyzed the different prediction models and designed the water consumption system, which has two functions of analysis of possible correlations between the water consumption and nature of the industry and prediction on future water consumption. As the system built, the paper provides samples and produces the results and analysis.
Obstacles Avoidance for UAV SLAM Based on Improved Artificial Potential Field
Authors: Wang Xi Bin , Song Chao , Zhao Guo Rong , Huang Jing Li
Published: December 2012

When UAV is implementing the simultaneous location and mapping (SLAM) problem, the environment where UAV is flying exist unavoidable solid or moving obstacles, which threaten the flying safety and the completeness of SLAM mission. To conquer this problem, an improved artificial potential field algorithm is proposed to simultaneously accomplish obstacle avoidance of UAV and SLAM mission based on a cost function containing the distance from UAV to the goal and from UAV to the obstacles. Concerning the built UAV plane motion model, this algorithm is simulated and tested. The result shows that the proposed algorithm is effective to avoid the obstacles for UAV SLAM.
Constant Palstance Control of Combine Cylinder Based On Nonlinear PID
Authors: Yu Ming Biao , Zhao De An , Zhang Jun
Published: December 2012

Considering that the threshing cylinder palstance system has characteristics of nonlinear, time-delay, what’s more the control environment is very complex and multi-disturbance; this paper presented the method of nonlinear PID to control the cylinder palstance. Firstly, The paper analyzes characteristics of the model of the threshing cylinder palstance system .Then the nonlinear PID controller is designed, and with the threshing cylinder palstance system constitute a closed-loop control system. Finally, simulation results show the effectiveness and feasibility of the proposed method.
Research on the Automatic Control System of Industrial Kiln of Hot-Dip Galvanizing
Authors: Liu Xi Min , Wang Shu Qiang
Published: December 2012

This article takes the natural gas hot-dip galvanizing kiln as the research object, designing a set of networked control system based on PROFIBUS, introducing the combustion system design of the natural gas kiln and the general structure of control system, and developing PLC control program and human-computer interface of the upper computer, and realizing network monitoring. It has been found that the stably running system provides powerful tools for product quality control and optimal operation management.
Thermal Power Plant Electrical Network Flow Calculations Based on AnySimu Platform
Authors: Liu Chang Liang , Gao Ya Long
Published: December 2012

In this paper, the Guodian Zhishen development of DCS as a platform, set up a thermal power plant 1000MW unit auxiliary power electrical system diagram AnySimu platform for simulation support system, and electrical network designed according to the principle of power flow calculation algorithm to calculate theeach node voltage, phase, and thus the load operator. After the simulation, verify the validity of the algorithm.
Numeric Simulation of Gas-Dynamic Processes in the Swirl Combustion Chamber in STAR-CCM+
Authors: Kuksov Igor , Mochalov Sergey , Sarychev Vladimir
Published: December 2012

The paper examines the theoretical and practical aspects of modeling of gas-dynamic processes in the swirl chamber. The results of numerical computation of a swirling gas flow induced by two-row header in cylindrical chamber are presented. The description of two-phase flow model subject to the injection of particles is given. It is revealed that in stationary mode two characteristic zones are formed: axial zone of quasi-solid rotation and cylinder surface zone.
Numerical Simulation Study on Air-Flow Migration Law about Vortex Air Curtain of Plane Wall Fan Drum
Authors: Zhou Gang , Cao Sen , Wang De Ming , Cheng Wei Min , Nie Wen
Published: December 2012

Vortex air curtain of plane wall fan drum can control the diffusion of air stripping dust effectively. In order to solve the high-concentration dust problem in fully mechanized excavation face, formation mechanism of vortex air curtain was analyzed. According to fluid mechanical control equations of gas phase flow, mathematical model was established to solve air migration law of vortex air curtain in fully mechanized excavation face. By using Simple algorithm based on collocated grid and fluent software, numerical simulation of air spatial migration law of closed-end dust control in fully mechanized excavation face was carried out. The simulation results show that vortex air curtain dust control system can form dust control fan drum along driving head to the front of the roadheader driver. According to the simulation results and actual conditions of working face field, vortex air curtain suction dust control system consisted of plane wall fan drum and exhausted dust purification device in fully mechanized excavation face was designed, and after it was applied in fully mechanized excavation face, the dust concentration decreased effectively in the working face field.
Fault Simulation of Relay Valve Based on AMEsim
Authors: Tao Zai Kun , Tian Chun , Wu Meng Ling
Published: December 2012

This paper analyzes the principle and structure of the relay valve, and AMEsim software is used to build up a relay valve model which can be used to simulating fault. And the model has been verified by comparing to the routine test data. Considering failure mechanism of various components of the relay valve, a modified relay valve model which can simulate some kinds of typical fault is built up. The braking system performance is researched under different kinds of fault. By analyzing and classifying the characteristics of brake cylinder pressure curve, piston displacement curve under kinds of fault condition, the fault reasons and actual fault location can be detected, which provides help for the relay valve maintenance and fault detection.
Study on Interphase Force Quantitative Detection Device of Horizontal Pipe Gas-Liquid Two-Phase Flow
Authors: Fang Li De , Lu Qing Hua , Xiang Xiu Ming , Liang Yu Jiao , Qing He
Published: December 2012

The paper focuses on the interphase force of the gas-liquid two-phase flow in the horizontal pipe design and designs a new interpahse force quantitative detection devices. On the basis of analyzing the physical models and the mathematical models, the devices got the more accurate differential pressure and the two-phase flow phase holdup, avoiding many factors by using the capacitance sensor which is made up of the complete closure outer electrode and flow media as the inner electrode. Finally, the devices achieved the quantitative detection of the interphase force through the differential pressure and the phase holdup. The experiments proved that the devices can better reflect the interphase force changes of the gas-liquid two-phase flow in the horizontal tube and reached the design goal very well.
Study on Entrainment Force between Phases Perpendicular to Horizontal Flow Direction in Gas-Liquid Two-Phase Flow
Authors: Fang Li De , Liu Ran , Xiang Xiu Ming , Qing He , Zhang Yao
Published: December 2012

In this paper, the theoretical model of entrainment force perpendicular to horizontal flow direction in gas-liquid two-phase flow was researched, then the entrainment forces were acquired by the interphase force detection device on the experimental device of gas-liquid two-phase, with working pressure of 0.05, 0.10 and 0.15MPa. The characteristics of entrainment force was analyzed at last. The results showed that the variation of entrainment force between phases obtained by experiment was in good agreement with theoretical analysis, moreover no correlation with working pressure.
Hydraulics Analysis System for Extended Reach Drilling in China and its Application
Authors: Guo Xiao Le , Wang Zhi Ming , Long Zhi Hui
Published: December 2012

The extended reach drilling (ERD) is being adopted widely as an effective and economical way of developing oilfields in China. But it also brought a series of technical difficulties because of its own characteristics. Some progresses were made after several years of hard work in China about Hydraulics for extended reach drilling, which included cuttings transport models and rules, precise model of circulating system pressure loss calculation, hole cleaning calculating models and monitoring method, hydraulic extended limit calculation model and analysis, hydraulics design and optimization method for ERD. Based on the above studies, the author finally developed a system of hole cleaning monitoring and hydraulics design and its risk analysis which could provide theoretical support and useful tool for engineering design and risk assess before drilling. These researches are helpful to ERD and have enriched the hydraulic theory of ERD.
Design of the Mixed Gas Quantitative Analysis Based on Grating Spectral
Authors: Zhu Ling Jian , Chen Jian Hong , Kang Sha Sha , Xiao Yin Di
Published: December 2012

A method of mixed gas quantitative analysis with near infrared spectroscopy （NIR）is described. A single plane diffraction grating is used in the monochromatic spectrum system. A quantitative analysis system is designed and constructed according to the parameters of the monochromator. The narrowband beam testing and spectral scanning experiments with methane and ethane are carried out. A 10nm narrowband beam is successfully obtained by the monochromatic system when the entrance slit width is 2mm. And a step-scanning resolution of the outgoing beam’s centre wavelength with 0.1nm can be realized within the spectra of 1.0-1.8μm. The results show that methane and ethane have a maxim characteristic absorption spectrum respectively with the centre wavelength of 1653nm and 1690nm existing between the spectra of 1.6-1.8μm, which is consistent with the HITRAN database. Presented approach has a successful application in online mixed gas monitoring with the characteristics of simple structure and low cost.
The Improvement of Control Methods for Small and Medium-Sized Hydraulic Forging Machine
Authors: Yan Xuan Xuan , Chen Tian
Published: December 2012

The hydraulic transmission control system in the metal forming equipment makes the piston rod freedom movement. This paper introduces that using PLC but not original relay contact to realize the free movement of the piston rod. Adopting PLC as the control system, the automation degree of the piston rod will be improved. And also ensure the piston rod has a high reliability when it has continuously acting, the system will meet the requirements of the general and flexibility. This paper analyzes the action of the hydraulic system. Subsequently, the methods of the hardware selection and the software program design were illustrated.