bluuebunny/crossref_metadata_2025 huggingface dataset:
Relations of the Laser Intensity Value, the Laser Ranging Value and the Laser Incident Angle
Authors: Cheng Xiao Jun , Tan Kai , Lou Qi Ye
Published: December 2012

Firstly, the functional relationships of the laser intensity value, the target reflectance, the laser ranging value and the laser incidence angle was derived theoretically in this paper, and a new method of target classification based on the laser intensity value and the target reflectance was proposed. Then, the experimental data was analyzed to verify the correctness of the theoretical formula. Finally, the work done in this paper was summarized.
Small Infrared Target Detection Based on Low-Rank and Sparse Matrix Decomposition
Authors: Zheng Cheng Yong , Li Hong
Published: December 2012

Sparse and low-rank matrix decomposition (SLMD) tries to decompose a matrix into a low-rank matrix and a sparse matrix, it has recently attached much research interest and has good applications in many fields. An infrared image with small target usually has slowly transitional background, it can be seen as the sum of low-rank background component and sparse target component. So by SLMD, the sparse target component can be separated from the infrared image and then be used for small infrared target detection (SITD). The augmented Lagrange method, which is currently the most efficient algorithm used for solving SLMD, was applied in this paper for SITD, some parameters were analyzed and adjusted for SITD. Experimental results show our algorithm is fast and reliable.
Fusion Algorithm of Infrared and Visible Images Based on Multiresolution Decomposition
Authors: Ding Chen
Published: December 2012

Information redundancy and complementarity are existing between the images obtained by multi-sensor, image fusion can improve the certainty and reliability of the information. Traditional method of image fusion based on multiresolution decomposition is susceptible to high frequency noise, fusion is often ineffective. A image fusion algorithm has been studied based on the wavelet multiresolution decomposition which is regional energy maximum for low-frequency decomposition image, and the bivariate statistical model for high-frequency part. The results show that: in the conditions of Daubechies 3 wavelet basis function, decomposition level 5 multiresolution decomposition, the bivariate statistical model for the high-frequency band is robust to noise based on the joint probability of wavelet coefficient pair - a wavelet coefficient and its parent; in the same time, the regional energy maximum for low-frequency band can be effective on the high-frequency band based on the bivariate statistical model. The fusion image has the biggish contrast, the preferable details, the higher gray level resolution.
Research on Measuring Gas Refractive Index with Microcomputer in Real-Time Based on Michelson Interference Theory
Authors: Xiao Hua , Chen Xiao Lan , Zhou Shao Na , Qi Jian Jun
Published: December 2012

When putting a gas cylinder on the light path of a Michelson interferometer, the changes of the cylinder's gas pressure will make a difference to the optical path of the two beams of light, which finally changes the number of the interference fringes. Based on the principles above, a new method was forward a to measure gas's refractive index in this research. First, use a linear CCD (Charge Coupled Device) as photoelectric sensor to capture light signal, then, turn the electrical signal from photoelectric sensor into digital signal, which would later be transferred to microcomputer through USB interface. Finally, figure out the gas's refractive index in real-time using microcomputer.
Study on the Aperture Leakage EMI Problems and its Simulation
Authors: Gao Yin Han , Gu Jun Jie , Yang Kai Yu , Li Ji Zhi , Zhang Hang
Published: December 2012

In the design and production process of car’s electronic equipment, the SE of the shield is reduced greatly for the existence of aperture.There is a modeling analysis to the aperture leakage EMI problems and derived a numerical calculation formula of the SE influenced by aperture leakage based on the slot antenna theory, also put forward the way to increase the SE of the shield by using Matlab software to simulate the SE of the shield with three regular apertures in different interference frequency. The simulation results have universal utility and which can provide data support for the design and layout of car’s internal circuits and devices.
Axial Vibration Characteristics of a Metal Diaphragm Coupling
Authors: Wang Guo Ping , Chen Hua Ling , Qi She Miao , Yu Lie
Published: December 2012

In this article, a metal diaphragm coupling is introduced. It is assembled by interference fit with the shafts. Based on two axial vibration styles, self-exited vibration and external exited vibration, of the coupling, physical model of the coupling is established. Stiffness and damping of the coupling are also solved and analyzed. Then, natural vibration of the coupling is researched and natural frequencies are acquired by analyzed and simulated method. Finally, axial vibration response of the coupling was presented based on a calculation example. Techniques are presented which permit the coupling designer to predictably modify the coupling and thereby make in-place retrofits should an axial resonance condition occur in the field.
Micro Vibration Measurement Sensor Based on the Tunneling Effect
Authors: Li Meng Chao , He Zhong Hai , Ma Zhen He
Published: December 2012

Scanning tunneling microscopy is one of the surface measurement instruments in micro and nano field, and the Z-direction resolution is 0.01nm. So it is easily affected by the external factor in the course of measurement. The influence of vibration has already become one of main obstacles for improving the nano measuring accuracy. In this article, micro vibration measurement based on the tunneling effect is referred. A new sensor design of double displacement stages is brought to study the micro vibration, and both stages have the nano level displacement and resolution. Using this sensor, the tunneling effect is realized and the micro vibration is measured. The experiment results show this design has stable performance, and the results can be used to be a reference for the compensation of scanning tunneling microscopy.
Application of Parametric Acoustic Receiving Array to Underwater Acoustic Measurement
Authors: Li Song Wen
Published: December 2012

The Parametric Acoustic Receiving Array achieves the directional reception characteristics through an end-fire array of virtual sources by the use of only two transducers (pump and hydrophone). With a radial size much smaller than linear receiving array whose radial size is too wide to fit in laboratory measurement of low frequency transducers, and with the ability of totally suppressing the inversely traveling signals, parametric acoustic receiving array can be used to measure low frequency complex waveform signals with large pulse length and broad bandwidth in reverberant tank. This paper gives a detail analysis and setups for this application.
Study on the Motor Noise Based on LabVIEW and FFT
Authors: Liang Yong Chun , Zhang Jing Nan , Wang Zhong Jie
Published: December 2012

The detection of motor noise can be used to evaluate the condition of motor. Furthermore the detection of motor noise can be used to analyze the source of motor noise and is helpful to reduce the motor noise. Through analyzing the mechanism of motor noise, a laptop computer and LabVIEW software are used to design the experimental system. The hardware of noise detection system consists of an external microphone and sound card coming with the computer. LabVIEW is used to detect the noise signal and record the noise and realize the spectrum analysis. Through detecting and analyzing the noise of the permanent magnet DC motor and three-phase asynchronous motor, It is proved that the motor noise experimental system consisting of computer and LabVIEW can fully meet the requirements of electrical machine test and research.
Identification of Noise Source Based on Partial Coherence Analysis
Authors: Wu Hai Ping , Lou Jing Jun , Liu Wen Wu
Published: December 2012

Noise source identification is the precondition and foundation of the noise reduction. There are some limitations while using some common method to analyze noise sources, so on the basis of partial coherence analysis and analytic hierarchy process, a method was proposed which can sort noise source contribution. When noise in the multi-source excitation system is coherent，this method can identify and sort noise source.
UAVRS Technique Applied to Emergency Response Management of Geological Hazard at Mountainous Area
Authors: Zheng Cai Gui , Yuan Dao Xian , Yang Qing Yuan , Zhang Xiao Cheng , Li Shi Chuan
Published: December 2012

Unmanned aerial vehicle remote sensing (UAVRS) technique was applied to emergency monitor Cocktail Mountain landslip geological hazard in Wulong county of Chongqing. The paper analyzes methods of accessing and processing digital image data in mountainous area and its application to emergency response management of geological hazard. The conclusion shows that UAVRS can access quickly high-precision remote sensing digital map and supply newly and explicit data for emergency decision. Combing with GIS spatial analyst modeling, UAVRS can assess high-speed hazard and provide base of allocating relief supplies. UAVRS integrating GIS can bring up potential and secondary disaster points for guaranteeing safety of personnel and property. UAVRS can also provide hazard information timely and exactly for pacifying the public to avoid panic. So UAVRS technique can provide technical support for emergency response management of geological hazard.
Flood Disaster Monitoring and Evaluation System Based on GIS and Remote Sensing: Case Study in Hejiang River
Authors: Sun Tao , Li Rong , Deng Hai Ying , Li Xiao Tao
Published: December 2012

Flood disaster occurs frequently in Hejiang watershed, Guangxi province which causes huge economic and social losses. Remote sensing technique (RS) has the advantage of quickness, economy, objectiveness and large observation area. As is known to all, geographic information system (GIS) is good at analyzing and dealing with spatial data. Based on GIS, RS and hydrological and hydraulic models, flood disaster evaluation system of Hejiang river is developed which realizes the seamless connection of GIS platform with Xinanjiang model and Muskingum model. GIS system combined with necessary information obtained from remote sensing images could extract useful thematic information of flood disaster, which is meaningful to flood control and disaster relief of local authorities.
Monitoring Subsidence in Tianjin Area Using the Multi-Baseline D-InSAR Technique
Authors: Zhao Hong Li , Fan Jing Hui , Guo Xiao Fang
Published: December 2012

Subsidence has been affecting Tianjin since 1960s. It posed comprehensive detrimental effects on natural environment, the economy and society. Considering the actual monitoring demand for land subsidence in Tianjin area, multi-baseline D-InSAR technique was studied. Using the multi-baseline DInSAR technique more interferograms can be generated, which is useful for retrieving the subsidence velocity accurately. And then regression algorithm and least square method are used to deal with the time series to get deformation result. In this paper, the multi-baseline DInSAR technique is used to measure the subsidence velocity in Tianjin area. It can be concluded that the algorithm is effective and feasible especially in the study area.
Research on Deformation Monitoring on Supporting Structure of Deep Foundation Pit Engineering Based on GPS
Authors: Liu Zhong Xin , Zhang Xue Jian
Published: December 2012

High-rise building deep foundation pits affect the peripheral physiognomy deformations directly, and brings serious hidden danger．deformation monitoring on supporting structure of deep foundation pits engineering is an effective means of construction safety warning. Three-dimensional coordinates of observation points can be available by GPS high precision positioning, and it is easier to realize of continuous, real-time and automatic monitoring than conventional observation methods.
Mechanical Test System for Large-Scale Structures in the Field Environment of Low Temperature
Authors: Jun Zhang , Li Ning , Li Wei , Ni Xiao Lu
Published: December 2012

A mechanical test system for large-scale structures in the field environment of low temperature was developed. The system consists mainly of the mobile-laboratory cabin, the electrometric-instrument system and the power supply system. After the completion of the present system, large-scale structures such as tall buildings , bridges and dams can investigate easily the behaviors subjected by exterior loads in the low-temperature condition.
Study on Load Spectrum Correlation between Service Roads and Proving Ground Roads Based on Spindle Wheel Forces
Authors: Hu Yu Dong , Zhou Hong , Xu Gang , Guan Chao , Wu Ying Xi
Published: December 2012

The spindle wheel forces load spectrums of certain car were collected on typical service roads and proving ground roads. Rain-flow matrixes of wheel forces in target service roads and proving ground roads were analyzed based on measured load spectrums with analysis software. Then different roads of proving ground were combined to simulate target service roads with load equivalent analysis method based on rain-flow matrixes. The damages were compared between target service roads and combined roads in proving ground. The results show that the combined roads in proving ground can reflect the true damage of the target service roads.
Measurement of Proppant Geometrical Characteristics Based on Chain Code
Authors: Zhang Li Ying , Zhang Xue Jun
Published: December 2012

In order to evaluate geometrical characteristics of proppant scientifically and accurately, both of the theoretical analysis and the experimental method were adopted. By binaryzation processing of the particles digital image, using chain code technology to realize regional boundary calibration to obtain vertex chain code and coordinates of boundary point, an algorithm has been inferred for particle size, sphericity and roundness, and problem-solving process for geometrical characteristics has been confirmed by experiments. The results indicate that measurement of geometrical characteristics, algorithm and analysis for the sizing and averaging have become rationale for the particle pattern recognition and analysis system. The conclusion breaks through traditional sieving methods in measuring and contrast plate method, laying foundation for the application of computer image analysis technology.
A Novel High Accuracy Sub-Pixel Corner Detection Algorithm for Camera Calibration
Authors: Yu Fang Jie , Luan Xin , Song Da Lei , Li Xiu Fang , Zhou Hong Hong
Published: December 2012

This paper presents a novel sub-pixel corner detection algorithm for camera calibration. In order to achieve high accuracy and robust performance, the pixel level candidate regions are firstly identified by Harris detector. Within these regions, the center of gravity (COG) method is used to gain sub-pixel corner detection. Instead of using the intensity value of the regions, we propose to use corner response function (CRF) as the distribution of the weights of COG. The results of camera calibration experiments show that the proposed algorithm is more accurate and robust than traditional COG sub-pixel corner detection methods.
Analysis on the Measurement of Bullet Impact Coordinates with Use of Acoustic Array and Optical Detection Sensor
Authors: Feng Bin , Meng Xiang Zhong
Published: December 2012

In order to establish a larger sensing area (10m×10m) and perform higher precision of the measurement system during barrel weapon test of vertical target dispersion, an optical detector is provided additionally in acoustic array to form a new measurement model, which does not only have the advantage of large sensing area, but also of higher precision. The paper presents and gives the measuring formula of the measuring model, and provides analysis on the measurement error. The simulation result showes that the errors of x and y Coordinates are 5mm and 15mm respectively.
A Non-Contact Method to Measure the Spatial Axis Position for Large-Scale Holes
Authors: Zhang Suo Huai , Meng Xu , Wan Wu Yong
Published: December 2012

Based on laser triangulation measuring principle, a non-contact precise measurement method is proposed to get the spatial axis position of the large hole parts. According to the method, the measurement system is designed and the measuring mathematical model is founded. The fitting curve of the scanning profile and the space equation of the central line are obtained by least squares method. Besides, the errors of the measurement system are analyzed and corrected. The spatial position of the central axis could be quickly obtained by the method.
Theory Analysis of Thermocouple Temperature Measurement
Authors: Liu Hai Tao , Shao Dan , Li Bao Qiang
Published: December 2012

The thermocouple is extremely wide application in temperature measurement. The active sensor has the advantages of simple structure, wide measuring range, high precision, signal stability and other advantages and is widely used in the detection of furnace and pipeline temperature. The author analyzes the theory of measurement of thermocouple, and put forward a kind of originality of thought. According to this idea, the author derives several laws of thermocouple, and finds that a simple estimation method. Finally, some of the common thermocouple method measurement results are given.
Measurement of Rotation Angle about Rotating Object Based on Digital Image
Authors: Huang Biao , Zhao Ji Wen , Wu Hong Biao , Fu Xue Min
Published: December 2012

One measurement of rotation angle about rotating object was proposed, it can realize precise and non-contact measurement. This measurement was executed as follow: firstly, select one image that it has abundant information, and the object which need rotation was pasted by this image. Secondly, when this object is begin to rotation, use CCD to collect the external images of the object before and after rotation respectively. Lastly, convert these two collected images from Descartes coordinate to polar coordinate, then calculate these two images in polar coordinate with phase correlation. The rotated angle was found by these steps. The result of this measurement experiment shows that this method can measure the rotated angle correctly. So this measurement method is worth to research and apply according to the theory and the experiment.
An Analysis Model for Structural Optimization of Polygon Ranging-Based Space Coordinate Measurement Network
Authors: Hu Jia Wen , Yu Xiao Fen , Miu Jun Tong , Zhu Ming
Published: December 2012

Polygon ranging-based space coordinate measurement network, which has high measurement accuracy and simple structure, is suitable for large-scale metrology. In practice, the measurement network should be constructed flexibly according to coverage and shape and measurement accuracy of different measurand. Based on this, a universal analysis model of structural optimization is proposed. The relation between structural parameters (amount and layout of measurement base stations) and distribution of measurement accuracy of the measurement network are researched on the model. The model can provide theoretic basis for optimized and flexible design of the measurement network. A case is used to illustrate this model. The results verify that the module can be used for scientifically establishing measurement system of ultra-large size, and also preliminarily simulating and optimally designing the being adopted measurement network and measurement method for meeting requirements of size and measurement accuracy (including global and local accuracy) of different work pieces.
A Study of the Electrostatic Field Networking in Three Isolated Thunderstorms
Authors: Wang Zhen Hui , Zeng Qing Feng , Guo Feng Xia , Xu Dong Pu , Wang Hao
Published: December 2012

This work presents an analysis of atmospheric electrostatic field (EF) networking using radar and sounding data base on a quasi-normal charge distribution model in isolated storm cells. The charge distribution parameters of the thundercloud are first estimated and inversed with the model, and then the networked EF of the ground can be recalculated using the obtained parameters. The method was used to analyze three isolated thunderstorms that passed through the experiment site in 2009. It was found that the EF networking and the charge distribution were concordant with the location of lightning and radar echo. It is revealed that the method for EF networking using radar and sounding data is feasible. It was also found out that the charge structures of three thunderstorms were similar, i.e., the charge structure was dipole in the development, tripole in the mature stage and dipole in the extinct stage. The charge structures at different stages, charge space-distribution around cloud-ground (CG) lightning occurrence may be conducive for electrostatic characteristics research and lightning forecasting.
Study on the Factors Influencing on the Variation of the Temperature in Cell Suspensions Exposed to Microwaves Based on the Temperature Sensor Technique
Authors: Qin Yu Rong , Chen Ni , Lin Hao , Huang Dong Li , Zhang Zhi Yong
Published: December 2012

Because of convenient and price cheap, microwave therapy is an effective method to treat leukemia now. However it is quite difficult to detect with nondestrctive method and control accurately the temperature inside the purifying material exposed to microwaves. If the temperature is lower, the luekimic cell can not be killed effectively. But if the temperature is too high, the normal and cancer cell should be killed together. In this paper, the influence factors on the temperature variation in suspensions exposed to microwaves were studied so as to the temperature can be controlled effectively. The results show that there are many factors influencing on the temperature change in suspensions exposed to microwaves, and among them the influence of microwaves power is the biggest. The surface temperature was measured by a temperature sensor, then the inside temperature can be calculated according to the difference between inside and outside liquids. Further, an automatic control system of microwave power was used to control the inside temperature in an appropriate range, at which the normal cells were protected and the cancer cell were killed effectively.
An Improved Digital Servo Burst Signal Sampling Model for Disk Drives
Authors: Wang Qing Dong , Wu Fei
Published: December 2012

In order to calculate the servo position error signal (PES) in the servo system, it is necessary to make high precision sampling and FFT calculation for the burst signal. Most designer s adopt 8bits ADC converter in the read write channel servo system of hard drive controller chip 88i6310 to cost down, and both servo system and signal system share the sampling circuit. Because of the quantitative noise disturbing during the sampling process, it is not enough to use 6bits ADC converter for the serve burst signal, and significant error exist for t he burst signal with the FFT calculation. This paper analyzed the existing servo over-sampling model via quantitative error model firstly, and provided the enhanced servo system sampling model. The simulation shows that, the enhanced solution reduces the average quantitative error from 0. 38 LSB to 0.14LSB, and improves the resolution of ADC converter from 9.5 bits to 10.8 bits.
Designs for Synchronous Data Acquisition of a Distributed System
Authors: Tian Zuo Xi , Yu Feng , Liu Zeng Wu
Published: December 2012

To resolve the problem of acquiring multi sensors signals synchronously in a distributed system, a project of distributed synchronous data acquisition based network time server was designed. The system comprised multi distributed sensor units, a centralized control unit and D&C (display and control) center. Each sensor unit was equipped with a data acquisition module. All data from sensor units were concentrated and sent to the D&C center, and the D&C center implemented power supply and management of sensor units via the centralized control unit. To synchronize the data acquisition modules, a network time server was employed in the D&C center. It received standard time information from GPS and outputted the time signal with DCF77-encoding. Each data acquisition module received and decoded DCF77 time signal, obtaining absolute time and synchronizing its time base. Above project was applied successfully in a system comprising 20 distributed sensor units. The results prove the designs feasible.
Automatic Detection of Interictal Epileptiform Discharges Based on the Similarity of Time-Series Sequence
Authors: Zhang Jian , Zou Jun Zhong , Chen Lan Lan , Zhao Chen Jie , Wang Gui Song
Published: December 2012

In this paper, an effective digital signal processing method based on the merger of the increasing and decreasing time-series sequences (MIDS) is introduced. On the basis of the merging of EEG signals, a new IED (Interictal Epileptiform Discharges) detection method is proposed. The first step of this new method is to establish a database by selecting peaked wave fragments. Then, the similarity between pending test fragment and peaked wave samples in the database is calculated. When the maximum similarity is greater than a certain threshold, the fragment is judged to be a peaked wave. Finally, the wave type i.e. spike wave, sharp wave, spike-and-slow wave or sharp-and-slow wave can be determined by whether there is a subsequent slow wave or not. Continuous sharp wave can be viewed as spike rhythm. In this research, 92 IED fragments from 4 suspected epilepsy patients are collected to establish the sample database. The proposed method was tested on EEG recordings from other 31 suspected patients. The results show that 98.11% of the IED fragments marked by doctors were detected. The experimental results show that this method performs well at IED detection in the clinical EEG data. The similarity is measured based on the comparison between fragments of different time length and can be viewed as a novel approach for the detection of typical EEG waveform. This research draws two conclusions: (1) the waveform of individual peaked wave is stable during 24-hour EEG recording process; (2) the database containing a small number peaked wave samples can be used to detect IED fragments.
New Method of Moving Targets Passive Tracking by Single Moving Observer Based on Measurement Data Fusion
Authors: Wang Jie Gui
Published: December 2012

Moving targets passive tracking by single moving observer is a difficult problem. A new location method based on measurement data fusion is proposed in this paper. Firstly, the adaptive passive tracking initiation algorithm is introduced. Secondly, a new data association algorithm is proposed, based on the data fusion of multiple measurements, the decision of synthetic data association is made. Finally, with the help of computer simulations, the proposed algorithms are proven to be correct and effective.
Robust Image Information Identification Algorithm Based on Time-Frequency Chirplet-Radon Transformation
Authors: Deng Ming Hui , Zeng Qing Shuang , Zhang Lan Ying
Published: December 2012

In this paper, a robust image watermarking method in two-dimensional space/spatial-frequency distributions domain is proposed which is robust against geometric distortion. This watermarking is detected by a linear frequency change. The one-dimensional chirplet transformation and radon transformation are used to detect the watermark. The chirp signals are used as watermarks and this type of signals is resistant to all stationary filtering methods and exhibits geometrical symmetry. In the two-dimensional Radon-Wigner transformation domain, the chirp signals used as watermarks change only its position in space/spatial-frequency distribution, after applying linear geometrical attack, such as scale rotation and cropping. But the two-dimensional Radon-Wigner transformation needs too much difficult computing. So the image is put into a series of 1D signal by choosing scalable local time windows. The watermarks are embedded in the 1D Chirplet-Radon transformation domains. The watermark thus generated is invisible and performs well in StirMark test. Compared with other watermarking algorithms, this algorithm is more robust, especially against geometric distortion, while having excellent frequency properties.
Feature Extraction by Combining Wavelet Packet Transform and Common Spatial Pattern in Brain-Computer Interfaces
Authors: Han Ren Xiang , Wei Qing Guo
Published: December 2012

Wavelet packet transform (WPT) and common spatial pattern (CSP) are two commonly used methods for feature extraction in brain-computer interfaces. In this paper, a new feature extraction method was proposed that was based on the combination of WPT and CSP. The raw EEG signals were band pass filtered between 8 and 30Hz, then the filtered signals were subject to WPT and reconstruction, and finally the reconstructed signals were spatially filtered by CSP algorithm. The proposed algorithm was applied to six data sets recorded during BCI experiments based on motor imagery. The results showed superior classification performance, thus verifying the feasibility and validity of the algorithm.
Research on Interference and Topology Control in Wireless Sensor Networks
Authors: Song Tao
Published: December 2012

Topology control has been well studied in wireless sensor networks. Power control technology as one way of topology control can be used to indirectly reduce the interference due to low degree sparse topologies produced by it. It has often been assumed that a sparse graph implicitly has low interference, but recent research shows that that is not necessarily true. In this paper, we discuss several typical methods to measure interference, and present a new interference model that aims to describe the interference of the entire network. We present LIST, a topology control algorithm that serves two purposes: it minimizes the interference in the network according to our metrics, and it keeps the spanner properties of the original graph. The paper is completed by simulations that compare different topologies with respect to different interference metrics. Some analyses of simulations results are given in the end.
Application of N6841A RF Sensor in Automated Radio Monitoring
Authors: Zheng Na , Chen Tong Hai , Cheng Si Yue
Published: December 2012

Based on the Agilent N6841A RF sensor, we took in-depth analysis and research on the basic principles, and for secondary development from the perspective of monitoring, storing the IQ data of unknown signals. Proposed analysis of the unknown signal based on RF sensor is to prepare for carrier frequency measurement, modulation recognition in order to achieve automated radio monitoring.
Control Scheme of Novel Pressurized Stripper and the Industrial Implementation
Authors: Feng Da Chun , Pan Ming , Qian Yu , Wang Xin Wu
Published: December 2012

A novel pressurized stripper with side-draw has been implemented successfully in coal-gasification industry and oil-refining industry. In this complex stripping process, ammonia and sour gas can be removed effectively from wastewater with ammonia and sour gas. However, compared to simple strippers, the complex pressurized strippers have rarely been considered for dynamic optimization before. In this paper, the dynamic simulation and optimal control of the novel stripper are proposed to improve the overall cost-effectiveness of the whole process. First of all, sensitivity analysis is proposed to find the sensitive plates in stripper with steady state simulation. Based on the sensitivity analysis, two control schemes are built up. And then, the rejecting disturbance capabilities of the two control schemes are compared and testified by using dynamic simulation. Finally, the optimal control scheme is implemented in industry with distributed control system (DCS). A real industrial application demonstrates that relies on the installed control system, the new stripping process can run steadily, consume less energy and satisfy the product quality requirements even though an uncertain disturbance occurs.
Design and Application Study of Optimization PID Control with Changing Integration Rate
Authors: Niu Hong Xia , Hou Tao
Published: December 2012

This paper is to demonstrate an improving PID control with changing integration rate approach, and it was validated and researched by applying to the 2- water tank system. Analyzed the control principle of variable speed integral PID in this research, and optimized the variable speed function of variable speed integral PID control to improve the design. Deduced the improved variable speed integral PID control algorithm, and it was applied to the 2- water tank system. And then made a simulation system to value it. The results show that the improved variable speed integral PID control enables the system to improve the rapidity and accuracy, also shows that the correctness and superiority of the control method. It really a useful method to provide a advanced way for the control system.
Force Feedback Calculation of Thread in the Desktop-Based Thread Force Feedback System
Authors: Liu Shuang , Wu Ping Dong , Huang Jie , Shan Ming Cai
Published: December 2012

The desktop-based thread force feedback system is divided into three logical parts. They are mechanical device, controller and data processing center. All kinds of interactive behaviors will be limited in the interactive space of the system. There exist two spaces of force feedback in the system. They are partial force space and entire force space. Operation vibrations will happen when the endpoints of threads enter from entire force space to partial force space. The vibrations will affect thread tension calculation. The quadratic program algorithm of thread tension can decrease vibrations and increase stability of thread force feedback when the tolerance coefficient is joined in the equations. It is a global optimization algorithm. The experiments have confirmed that threads tension changes will be smooth when the tolerance coefficient is not equal to zero.
Nonlinear Predictive Decoupling Control of Rotorcraft UAV Using Serial Decoupling Method
Authors: Ruan Xiao Gang , Hou Xu Yang
Published: December 2012

A predictive decoupling control algorithm using serial decoupling method is proposed to control Rotorcraft UAV(RUAV). The dynamic model of the RUAV is decoupled into two sub-systems with serial relation. Two model predictive control(MPC) controllers are designed separately for the two sub-systems, and the serial relation is established between them by optimal control sequence. The stability of the proposed serial predictive decoupling control algorithm is proved. The benefit of the proposed algorithm is that the calculation burden of the MPC controllers of decoupled sub-systems is much less than that of the high-dimensional nonlinear model before decoupling. Moreover, the optimality of the MPC controllers of decoupled sub-systems is greatly improved since the coupling effect is eliminated. Experiments are done to verify the effectiveness and feasibility of the proposed algorithm, and the results show that the proposed algorithm is feasible and effective for the flight control of the RUAV.
Study on the Speed Control of a Marine Diesel Based on Fuzzy RBF-PID Strategy
Authors: Kong Qing Fu , Zeng Fan Ming , Wu Jie Chang , Wu Jia Ming
Published: December 2012

It is very important to enhance the speed control effect of marine diesels. However, marine diesels are typical complex objects; sometimes it is difficult to achieve the control goals of the diesel speed with traditional PID strategy due to its fixed control parameters under all working conditions. In order to improve the speed control effect of marine diesels, the intelligent fuzzy RBF-PID strategy, which is integrated by fuzzy, Radical Basis Function (RBF) network and PID strategies, is presented in the paper. Development of the fuzzy RBF-PID controller is discussed in detail. Finally, the validity of the fuzzy RBF-PID strategy for the speed control of marine diesels is verified by simulation results.
Simulation of the Flow Parameters of the Multi-Microchannel Aerostatic Restrictor
Authors: Zhang Yu Bing , Li Cai Qin , Li Dong Sheng
Published: December 2012

A numerical simulation method, FLUENT,has been selected to simulate the flow field parameters of the multi-microchannel aerostatic restrictor. Pressure, temperature and velocity distributions of the restrictor under different gas film thickness and gas pressure were got and compared. Used Pro / E to establish three-dimensional model of restrictor and imported it into GAMBIT for meshing, and then used FLUENT for simulation.
A Fuzzy Temperature Control System for Pressure-Sensitive Paint Measurement
Authors: Mao Jian Guo , Zhang Hui Yu , Lu Guang Min , Xu Jian Kang
Published: December 2012

This template explains a design of a fuzzy temperature control system for the pressure-sensitive paint. According to the relationship between temperature difference and the current of semiconductor chip, the fuzzy system control theory, control the volume of the domain, control rules design, and design a constant current source circuit to control the current through the chip, and finally make experimental verification of the system. The system hardware uses C8051F040 MCU, temperature chip DS18B20, keyboard chip CH451.
The Development of the Durable Test-Bed of the Hydraulic Pump
Authors: Wan Li Rong , Kang Hong Xi , Liu Zhi Hai , Wang Cheng Long
Published: December 2012

An energy recovery method during the durable test is put forward in this essay, and the durable test-bed of the hydraulic pump is developed. The efficiency and accuracy data acquisition is realized by using High-Speed High-Resolution sensor and data collection module. Control automation is come true by using PLC, industrial tablet PC and electric command device. The instrument panel constructed by LabWindows/CVI made the operation more concision, flexible and easy-to-use. This test bed has been put into use for a year and shows that the system can realize duration and efficient test of hydraulic pump easily and reliable.
Analysis of the Transitions and Energy Losses of a High Flow Rate High Speed On/Off Valve
Authors: Chen Jian , Su Zhu Ming , Zhou Qi
Published: December 2012

Four transitions of a new high speed on/off valve are investigated. Energy losses passing through the on/off valve are analyzed. The useful mathematical equations of energy losses related to the geometric parameters of the on/off valve and hydraulic system parameters are deduced. How to decrease energy losses in the design of the on/off valve is discussed.
Direct Torque Control Servo System for Permanent Magnet Synchronous Motor
Authors: Tu Xiao Wei , Yang Ying , Chen Xing , Yu Zhi Xuan
Published: December 2012

Permanent magnet synchronous motor (PMSM) servo system has been widely used in various fields. To improve its performance, the hardware and software of PMSM servo system based on the advance DSP of TMS302F28335 were designed in this paper. The principle of DTC for PMSM and stator flux estimator used LPF instead of pure integrator are introduced. The simulation and experimental results show that the designed servo system can achieve good dynamic, static performance and good robustness.
The Assistant Deployment of the Space Mechanism on the Ground
Authors: Xing Si Ming , Song Yang
Published: December 2012

This paper describes on the issue about the deployment and position of the space mechanism under the vacuum, low temperature environment on the ground. Firstly, for the technical requirement of the deployment mechanism, the authors put forward deployment mechanism project, conduct the structural design. Secondly, focused on the hardware design and the software design of the control system, the control system using master and slave CPU structure of the upper and lower computer, and the rotatable control using the teach mode. Finally, the authors conduct the deployment device performance test under the vacuum, low temperature environment.
Analysis for Packet Dropout of Brushless Direct-Current Motor Networked Control System
Authors: Zong Xiao Ping , Zhang Miao , Zhao Lei
Published: December 2012

In order to achieve remote control of brushless direct-current motor, real-time communication network is introduced into brushless direct-current motor control system. This paper deals with the problem of switching between an open-loop estimator and a closed-loop estimator for compensating packet dropout of brushless direct-current motor networked control system. A sufficient condition for stabilization of brushless direct-current motor networked control system is presented by multiple Lyapunov-like functions, and controller is designed by means of linear matrix inequalities. Simulation results show the feasibility and efficiency of the method.
Analysis on Geometry Error Software Compensation Technology Model of Gantry Five-Axis NC Machine Tool
Authors: Han Hua Gang , Hu Xiao Lin , Li Ying Chun , Shang Guan Feng Shou
Published: December 2012

Based on multi-body system, the error model of gantry five-axis NC machine tools was discussed. The calculate method of precision process equation and NC instruction has been derived out. Based the above research works，make a emulate by using of geometry error compensation soft-ware. The result show machining precision can be improved through the error compensation method which is concluded in this paper.
A System of Position Control for Cylinder Based on Self-Tuning Fuzzy Control
Authors: Gong Rui Kun , Zhao Li Jing , Wang Chong Hao , Zhang Ya Nan
Published: December 2012

For cylinder position servo system strongly nonlinear and uncertainty, This article puts forward cylinder position control system based on self-tuning fuzzy control. The self-tuning fuzzy control algorithm was introduced to ensure the application of cylinder position control. The self-tuning fuzzy controller we designed applied the control model of double input of position deviation and its deviations rate and single output of control quantity. The study suggested that the position control precision may reach ±0.25 mm.This system can make the cylinder position to get high accuracy control.
Simulation-Based Comparison of Pull-Push Systems in Motorcycle Assembly Line
Authors: Sutee Umchid , Yarlagadda Prasad K.D.V.
Published: December 2012

To investigate the effects of adopting a pull system in assembly lines in contrast to a push system, simulation software called “ARENA” is used as a tool in order to present numerical results from both systems. Simulation scenarios are created to evaluate the effects of attributes changing in assembly systems, with influential factors including the change of manufacturing system (push system to pull system) and variation of demand. Moreover, pull system manufacturing consists of the addition attribute, which is the number of buffer storage. This paper will provide an analysis based on a previous case study, hence process time and workflow refer to the journal name “Optimising and simulating the assembly line balancing problem in a motorcycle manufacturing company: a case study” [2]. The implementation of the pull system mechanism is to produce a system improvement in terms of the number of Work-In-Process (WIP), total time of products in the system, and the number of finished product inventory, while retaining the same throughput.
Research of Cargo Truck Model Based on the Lift Bucket
Authors: Chen Sui Lei , Gao Tian Ge , Tu Yin Qing , Wang Xue Nan , Zhang Feng
Published: December 2012

To deal with the cargo trucks’ problem that handling of cargos is time-consuming due to the buckets of cargos can’t be lifted, this study aims to design a cargo truck with lift bucket. Based on the idea of driving principle, mechanical structure and simulation of overall modeling, this paper proposes a cargo truck model with the lift bucket. Using front-wheel drive, the newly designed cargo truck model drops the bucket near the ground or lands the bucket, which saves manual handling from the original height of bucket to the ground. Thus, operators can load or unload the lift bucket by moving the cargos at the ground level, without using cargo handling platform and lifting system or manually lifting cargos. Transportation can be achieved simply by lifting the bucket. This model not only saves manual power, but also improves handling efficiency.
Multi-Mode Flight Control Simulation of UAV Based on Stateflow and GUI
Authors: Zhang Ning , Chen Hua Wei , Qin Kai Yu
Published: December 2012

Considering a UAV has different flight control modes, such as remote control instruction flight and auto-navigation flight, this paper uses modular designing method to describe the overall structure of simulation model, and based on the way of loading waypoint, focuses on discussing the control logic of auto-navigation flight. Furthermore, according to the flight control logic of UAV, the simulation model was built by using Stateflow, and combining with Matlab GUI, the remote control instruction was realized. The simulation results in the auto-navigation flight can effectually verify the correctness of the design of flight navigation strategies and control law. It is practical to build the simulation environment by using Stateflow and GUI technology.
Experimental Study on a New Type of Cooling Device Used in High Heat Dissipation of CPU
Authors: Liu Meng , Wang Fang , Lou Lei , Dai Sheng Liang , Da Wei Feng
Published: December 2012

A new type of cooling device used for server is designed in this paper. A small type of server is taken as a research object to compare the effect of air cooling and evaporative cooling under different CPU power consumption. The effects of this research are discussed on evaporative cooling for the stability of the CPU heat dissipation and the cooler on other components. The results show that the temperature distribution of the server’s case is more uniform and the temperature test of the CPU is more stable when it is cooled by evaporative cooling.
A Mountain Highway Slope Stability Analysis
Authors: Zhong Ling Jun , Liu Jie , Yang Dong Dong , Feng Li , Wang Hang Hang
Published: December 2012

Through the analysis of its geology and geomorphology to calculate the relevant parameters , some hidden problems of slope stability of the mountain road are calculated and analyzed by the finite element method for solving the slope stress and strain and the analysis results of plastic zone , which confirms the slope stability conclusions drawn by the safety factor .
A Multi-Classified Method of Support Vector Machine (SVM) Based on Entropy
Authors: Yue Yan
Published: December 2012

Studies propose to combine standard SVM classification with the information entropy to increase SVM classification rate as well as reduce computational load of SVM testing. The algorithm uses the information entropy theory to per-treat samples’ attributes, and can eliminate some attributes which put small impacts on the date classification by introducing the reduction coefficient, and then reduce the amount of support vectors. The results show that this algorithm can reduce the amount of support vectors in the process of the classification with support vector machine, and heighten the recognition rate when the amount of the samples is larger compared to standard SVM and DAGSVM.