bluuebunny/crossref_metadata_2025 huggingface dataset:
Application of Data Protection in Motor Test and Control System
Authors: Yang Ying Hua , Gao Hong Lin , Wang Xin Hua , Tang Jin Fei , Zhang Yong
Published: August 2011

This paper expounds the concept and principle of data protection. According to the request of AC motor test and control system, the paper uses thread safe queues technology of LabWindows/CVI to protect motor’s data. Finally, effect of thread safe queues is validated through experiments, it proves that data protection can properly reflects motor’s status.
Analysis and Evaluation of InSAR Phase Unwrapping Approaches
Authors: Zhang Shu Bi , Fu Tuo
Published: August 2011

In recent years SAR interferometry has become a widely used technique for measuring altitude and displacement of the surface of the earth. Phase unwrapping of the interferometric SAR is a very important step to obtain an accurate DEM(Digital Elevation Model)[1,2,3],and phase unwrapping is not only crucial in InSAR but also a major source in InSAR errors. Therefore, with GAMMA software, VC++ and MATLAB coding implementing six kinds of phase unwrapping approaches ,this paper presents the best method for different situations through two sets of experimental results used for analysing and comparing run time and precision. In the plain and alpine area, the best phase unwrapping methods are separately Goldstein branch-cut method and Minimum Cost Network Flow method.
Precision Analysis of Gravity Vertical Gradient Measurement Based on CG - 5 Relative Gravimeter
Authors: Wang Qing Bin , Zhou Rui , Sun Wen
Published: August 2011

CG-5 is new automatic land relative gravimeter developed by Canada Scintrex Company. Gravity vertical gradient can be measured by CG-5. This article mainly aims at precision analysis of the gravity vertical gradient measurement based on CG-5.This paper analyzes the error sources and error propagation formulae. In the end, it shows relation between altitude differences and observation sets in certain accuracy requirement. Results show that the precision of CG-5 vertical gradient measurement is improved when altitude difference and observation set increase. In vertical gradient measurement, 13 observation sets are needed with altitude difference at 2m to obtain the precision of ±20E.
Research and Implement the Image Retrieval Method Based on the Shape Feature
Authors: Guo Xiao Juan , Wang Quan Rui , Li Chang Jiang , Liang Yun Juan
Published: August 2011

The paper has research and analyzed the arithmetic of shape features extraction and similarity metric, and adopted the Euclid distance metric, and according to the image database of the bird which from UIUC and the database of chair, strawberry from Caltech 101, the Hu invariants moments features extraction are validated. Compared these experiment results, at the different database, some image which has simple background and different shape object can be obtained the better retrieval effect.
A Wireless Pulse Signal Acquisition System for Status Monitoring of Ship Navigators
Authors: Lu Ying Zhe , Yang Wen Lu
Published: August 2011

A design of wireless pulse signal acquisition system for status monitoring of ship navigators has been presented. The system employs STC12LE5608AD as controller for timing acquisition of the pulse signal. And then the data are written to the register of CC2500 via SPI interface and transmitted. When the receiver takes the data, the MCU reads the data from the receiver register of CC2500. Finally the MCU send the data to computer via UART for display and further processing. Wireless transmission insures that the system can analyze the degree of navigators' fatigue objectively and quantifiably without affecting their operation of the ship. The system serves as a warning for fatigue navigation. This system has advantages of low power consumption and portability. It has the practical value of safe navigation of ships.
Study on Texture Features of Cingulum in Different Gender Patients with Alzheimer’s Disease and Mild Cognitive Impairment Based on MR Images
Authors: Wang Xu , Tong Long Zheng , Li Xin , Zhou Xiao Xia , Yang Hui Fang
Published: August 2011

The aim of this article is to study the texture features of cingulum in patients with Alzheimer's disease (AD) and mild cognitive impairment (MCI) based on magnetic resonance images, and explore the texture differences derived from different gender among each group. Texture analysis was performed on 7 AD patients, 14 MCI patients and 11 normal controls (NC). Texture features extracted from gray level co-occurrence matrix and run-length matrix were analyzed between each two groups. The results showed that texture features of the anterior cingulum had significant differences in the multiple comparisons and features of the posterior cingulum had significant differences between AD and MCI group as well as AD and NC group. There were significant differences between AD and MCI group as well as AD and NC group in male’s cingulum. While in female’s cingulaum, the differences were founded between AD and NC group. The results indicated that the pathological changes in cingulum could be reflected by texture features and the pathological changes may be different in the two genders.
Measurement of the Ratio of Tea Polyphenols to Amino Acids in Green Tea Infusion Based on near Infrared Spectroscopy
Authors: Ai Shi Rong , Wu Rui Mei , Yan Lin Yuan , Wu Yan Hong
Published: August 2011

This study attempted the feasibility to determine the ratio of tea polyphenols to amino acids in green tea infusion using near infrared (NIR) spectroscopy combined with synergy interval PLS (siPLS) algorithms. First, SNV was used to preprocess the original spectra of tea infusion; then, siPLS was used to select the efficient spectra regions from the preprocessed spectra. Experimental results showed that the spectra regions [7 8 18] were selected, which were out of the strong absorption of H2O. The optimal PLS model was developed with the selected regions when 6 PCs components were contained. The RMSEP value was equal to 0.316 and the correlation coefficient (R) was equal to 0.8727 in prediction set. The results demonstrated that NIR can be successfully used to determinate the ration of tea polyphenols to amino acids in green tea infusion.
3D Groundwater Modelling Using Well Drilling Data in Tanggu, China
Authors: Sun Yan , Qu Fu Tian , Liu Zhong Gang
Published: August 2011

In this paper, an approach is provided to reconstruct groundwater structures in three dimensions using well drilling data. The methodology was developed to construct the groundwater 3D model in order to better manage the groundwater production in Tanggu, Tianjin, China. At first, all the data (Fundamental geographic data, DEM, Boreholes’ tables) of the study area were organized in a geodatabase using ESRI® ArcGIS®. Secondly, 3D stratigraphy is constructed. Then, common 2D map can be instead of 3D visualization method. Finally, a groundwater 3D management system is developed to achieve the functions such as to manage, query, analyst, decision support and 3D visualization about groundwater information.
Direct Phase Detection Utilizing Phase Contrast Imaging
Authors: Yuan Sheng Ping , Li Chong Guang , Pan Li Ping
Published: August 2011

A mathematical approach to describe phase contrast imaging is presented by means of Taylor expansion. The contrast of image of phase object is discussed by changing the absorption and phase-retarding of spatial filters at Fourier plane. A new filtering method is proposed to enhance the image contrast. Based on this approach, a phase-to-intensity image of phase object with higher contrast is got at its imaging plane. Through the image the phase can be detected directly without interferogram processes or phase unwrapping. From the mathematical approach, simulation in MATLAB programming is executed to prove the feasibility of small phase detection. The quick detection of phase may be used for applications such as studying living cells, high throughput microscopy or automated microscopy.
Static Friction Research of LIGA-Microstructure: Comparison between Theory and Experiments
Authors: Wang Qian Qian , Shi Geng Chen , Xiong Xin
Published: August 2011

Micro electro mechanical system (MEMS) has been increasingly used in military application. For the reliability and specialty of military requirements, the material of the MEMS device is supposed to be metal and the device is moveable. Lithographic, Galvanoforming, Abformung (LIGA) technology capable of producing high aspect ratio structures in metals like nickel is one of the important fabrication technologies in military MEMS. There are many moveable MEMS device like micro-gear and micro-slider producing by LIGA technology. But the moveable devices cannot behave well because of the friction effect. In this paper, an improved elastic-plastic model including roughness effects and an experimental procedure that predict the static friction prosperity of LIGA-processed nickel is proposed. Firstly, we use the 3D optical profilometer to research the surface roughness of LIGA-processed nickel, the surface heights distribution was found to be nearly Gaussian distribution. Secondly, the static friction model, the Kogut-Etsion (KE) model is adopted to obtain the static friction coefficient. Finally, a special designed static friction coefficient measurement apparatus is used to conduct the friction experiments. The results indicate that the surface roughness affects the friction and the smoother surface leads to a higher friction coefficient. Also good agreement was found between simulations and experimental results.
Application of Distributed Hydrological Model Based on Multivariant Checking for Monitoring Regional ET
Authors: Liu Miao , Liu Jia Hong , Zhang Jun E
Published: August 2011

Water management based on “regional objective ET” had been a hotspot in water shortage region. This article detailedly overviewed the major methods for monitoring ET through field measure and remote sensing retrieval, meanwhile application of distributed hydrological model based on multivariant checking to improve the result of remote sensing retrieval of ET was discussed. The region of Handan was chosen as a example to analyze the correlation of results of MODcycle model and remote sensing retrieval for ET calculation.
Research and Experiment on Nonlinear Correction Algorithm of Metal Tube Rotameter
Authors: Shen Gao Zhan , Zhang Tao , Xu Ying , Wei Yan Xing
Published: August 2011

The calibration curve of some metal tube rotameter has the characteristic of mutation. If the nonlinear least square method is still used as the method of linear correction, it will increase the measurement error and reduce the measurement accuracy. This paper presents a Division Ordinary Least Squares Method, which can reduce errors and improve accuracy. By the algorithm comparative experiment it can be proved that the method can improve the measurement accuracy.
Research on Parallel DBSCAN Algorithm Design Based on MapReduce
Authors: Fu Yan Xiang , Zhao Wei Zhong , Ma Hui Fang
Published: August 2011

Data clustering has been received considerable attention in many applications, such as data mining, document retrieval, image segmentation and pattern classification. The enlarging volumes of information emerging by the progress of technology, makes clustering of very large scale of data a challenging task. In order to deal with the problem, more researchers try to design efficient parallel clustering algorithms. In this paper, we propose a parallel DBSCAN clustering algorithm based on Hadoop, which is a simple yet powerful parallel programming platform. The experimental results demonstrate that the proposed algorithm can scale well and efficiently process large datasets on commodity hardware.
Grid-Based Corner Detection of the Microscopic Camera Calibration
Authors: Yuan Wang , Jiang Gang Yi , Wang Yi Gang , Yu Mei , Shao Feng , Peng Zong Ju
Published: August 2011

Camera calibration is one of the key technologies of Computer Vision. This paper presented a microscope camera calibration method based on grid corner detection for the particular application area of microscopic measurement. The method considered not only the radial distortion, but also other non-linear factors, such as centrifugal distortion and thin-prism distortion. First of all, the actual corner coordinates information of the grid was obtained through the improved corner detection method. Then, the matrixes of lens distortion parameters and camera internal parameters were gotten according to the camera imaging model. Finally, through the established non-linear camera model, the average error between fore-projection and re-projection grid corner coordinates was obtained by re-projecting the grid corner coordinates. Experimental results show that the corner detection algorithm is accurate and the final calibration error is 0.6319 pixel, which is applicable to microscopic camera calibration.
The Perceptual Study of the Tolerance of Spectral Images Based on Bootstrap Analysis
Authors: Chen Qiao , Wang Li Jie , Westland Stephen
Published: August 2011

Spectral images contain a large volume of data and place considerable demands on computer hardware and software compared with standard trichromatic image storage and processing. Although the imformation of reflectance spectra may be represented efficiently using linear modelsa key task is to answer how many basis functions of a linear model are necessary for a given accuracy of representation. Because the most common application of spectral images is the reproduction of color and images, it ishighlyimportant to study the tolerance of human perceptions over spectral images represented by low-dimensional linear models. In this study several data sets and psychophysical studies have been used to investigate how many basis functions are necessary to represent a spectral image to be indistinguishable from the original image. The raw objective experiment datas are analysed by a comprehensive probit analysis based on the bootstrap method, and results show that the perceptual tolerance for spectral images reconsctucted by variouse number of basis functions is highly image dependent.
High-Speed LMS Algorithm’s Design and Implementation Based on FPGA
Authors: Liang Jing Jing , Gao Jing Min , Ling Wei Xin
Published: August 2011

This Paper Proposes a Kind of High-Speed Hardware Implementation Method by the Adaptive Equalizer (LMS Equalizer) Based on MSE Criteria. this Design First Makes Full Use of FPGA Internal Hardware on Time-Multiplier (DSP48Es), and Uses the High Throughput of the Streaming Design. then Reoccupy Matlab Software Simulation and Fixed Point Design, Finally Realized ML506 Development Board in Hardware Association Simulation. Experimental Proof, both the Simulation Results Are Consistent, and it Shows that the Proposed Algorithm Is Feasibility and Efficiency, and Has a High Application Value.
One Fault Diagnosis Method of Telecommunications Network
Authors: Dong Cheng Gen , Wu Jin Pei , Zhang Qi Shan
Published: August 2011

Telecommunications network fault location process of the root cause is the fault diagnosis process, there are mature products in general is the use of rule-based approach, rule-based approach is not suitable because of its inherent defects in the application of large-scale telecommunications networks, Thought about the uncertainty and incomplete of telecommunications networks events in nature, this article applied Bayesian network method to solve the information uncertainty and incomplete of telecommunications networks events, taking on the Bayesian reasoning method, proposed three optimization methods, namely, narrow range method, pretreatment method and the results of validation and verification method. with experiment on an actual existing network, these tree methods can effectively improve the telecommunications network fault diagnostic accuracy, lower false alarm rate.
Design and Implementation of Turbine Flow Sensor Based on Photoelectric Detection
Authors: Zheng De Zhi , Wang Fei , Shi Ji Ying , Wang Hao
Published: August 2011

For its advantages of simple structure and low cost, turbine flow sensor has been widely applied in gas and liquid transportation and other industries for measuring liquid or gas flowrate. Firstly, the output pulse signal property of turbine flow sensor was studied. To achieve the dynamic response, a new turbine flow sensor which based on the photoelectric detection is designed in this paper. In addition, experimental testing on the turbine flow sensor has been carried out on standard calibration facilities with high accuracy. The results confirm that the design is feasible, and the repeatability error is about 0.5%, the maximum relative error is less than 1%.
A Novel High Efficiency Solution of High Power LED Lighting
Authors: Fan Qiang , Fu Xian Song , Liu Yi Li , Niu Ping Juan , Gao Tie Cheng
Published: August 2011

High power LED is a kind of ideal green lighting source, which owns longer life, higher efficiency and lower electricity power consumption than incandescent lamps and fluorescent bulbs. Constant current driver is the most key factor for high power LED’s premium properties. Based on the specific chip LM3478, a novel Boost DC/DC converting circuit to drive LED was proposed. The whole circuit structure was simple, and owned high reliability with over current protection. The circuit operates continuous current mode (CCM), with normal supply voltage 12V. The constant output current is 700mA, which can drive two-row LED series, 5 LEDs at least each series. The test results show that the electricity efficiency is up to 93.20% and that the output current deviation is 7.71%. The operating temperature range is -40~+125°C.
Nanosecond Pulse Near-Field Sensing Based Non-Contact Physiological Signals Measurement
Authors: Lin Hong Dun , Lee Yen Shien , Su Yu Jen , Chuang Bor Nian
Published: August 2011

Clinically, basic physiological signal measurement, such as cardiovascular vibration and respiration motion detection, reveals important vital information of clinical diagnosis or personal health status evaluation. In routine, there are many preferable non-invasive methods, including electrocardiogram (ECG), pressure-sensitive transducers and applanation tonometry, to get insight of the sign of life. However, the operation of traditional monitors is relied on professionals’ experience, and also the sensing probes needed to contact to the user’s skin directly. The measurement procedure is easy to cause inconvenient and uncomfortable. To improve the issues of these measuring techniques, the non-contact and non-invasive measuring method will become an important innovation. In this paper, the novel nanosecond pulse near-field sensing (NPNS) based screening technology, which includes radio frequency (RF) pulse transmission and a flat antenna connected to transceiver of miniature radar, is proposed to monitor physical activity inside body. A dedicate analysis software built in Smartphone is also provided to calculate desired parameters, including heart rate and breath rate, for clinical or common personal applications. To evaluate the performance, the proposed method was applied on motion measurement at the body site of chest. As a result, the proposed method is validated to perform the capability of continuously long-term monitoring to reveal cardiovascular information in real-time.
Research and Application of Moore’s Time-Varying Loudness Model
Authors: Liu Wei , He Ling Song
Published: August 2011

Loudness is one of the most important parameters of psychoacoustics. In the past, most loudness models were applicable only to steady sounds. However, most everyday sounds are time-varying. Moore and coworkers described a time-varying loudness model based on Moore’s Loudness model. In this paper, a detailed calculation of Moore’s time-varying loudness model is given. The model using the time waveform of a sound which is picked up by the microphone as its input is implemented in Visual C++. The results which are compared with LabVIEW and ANSI show that the system is feasible.
A Case Study: Low Power Design-for-Testability Features of a Multi-Core Processor Godson-T
Authors: Wang Da , Fan Dong Rui , Hu Yu
Published: August 2011

This paper describes the low power test challenges and features of a multi-core processor, Godson-T, which contains 16 identical cores. Since the silicon design technology scales to ultra deep submicron and even nanometers, the complexity and cost of testing is growing up, and the test power of such designs is extremely curious, especially for multicore processors. In this paper, we use the modular design methodology and scaleable design-for-testability (DFT) structure to achieve low test power, at the same time, an improved test pattern generation method is studied to reduce test power further more. The experimental results from the real chip show that the test power and test time are well balanced while achieving acceptable test coverage and cost.
Local Variance Based Color Image Quality Assessment Method
Authors: Wang Yu Qing
Published: August 2011

In this paper, local variance is used to describe the structural information of a color image in order to assess its quality. The representation method is different from conventional models in that some information that is sensitive to human eyes is enhanced by using local variance distribution. It encodes the local variance distribution of different channels of a color image into the three imaginary parts of a quaternion. The distance between the singular value feature vectors of the source image block and the distorted image block which are described by quaternion matrices is calculated. The experimental results show that the assessment results of the proposed assessment method are more consistent with the Human Visual System than those of the conventional assessment methods.
Lamb Wave-Based Damage Location Detection Method of Composite Plate
Authors: Zhang Li Shao , Chen Huan Guo , Li Jian Min , Tian Li
Published: August 2011

To understand more about Lamb waves on composite laminates damage detection features, the Lamb wave group velocity dispersion curves are calculated and plotted by using dichotomy method in MATLAB. The signal parameters are chosen according to Group velocity dispersion curves. The dynamic response signals of the composite plate are obtained by finite element method. Damage location is calculated by the actual group velocity of Lamb wave and time of flight of the difference signal before and after damage.
Experiment and Numerical Simulation Study on the Viscosity Impact of Turbine Flowmeter's Performance
Authors: Zhao Jian Liang , Sun Li Jun , Zhang Tao , Cao Lei
Published: August 2011

Turbine flow meter is a very significant measuring instrument. As an important flow meter, turbine meter is widely used in many fields for its high accuracy, good repeatability, small size and light weight. However, with the viscosity of the measurement fluid increasing, the measured variation of the linearity becomes bad, which makes great influence on the meter factor. In this paper, the experiment on the viscosity impact of turbine flowmeter's performance was completed by adjusting the temperature of the mixture of diesel and lubricants, i.e. changing medium viscosity. And the methods of computational fluid dynamics (CFD) numerical simulate were used to research the accuracy of the turbine flow meter in the same conditions. According to the comparison of the two methods, the influence of the turbine flowmeter’s precision measuring fluids with different viscosities was analyzed. It provides a data basement for improving the measurement accuracy of a certain viscosity fluid in the future.
Research and Design of Laser Accurate Displacement Measurement System
Authors: Wang Xiao Gang , Bai Yue Wei , Liu Kai
Published: August 2011

Laser displacement sensor(LDS) displacement measurement is a non-contact measurement with more precision and a wide range of applications.。In this paper, a laser accurate displacement measurement system based on LDS and three-dimensional linear-servomotor-driven actuators (3D LSDA) is presented. The 3D LSDA moving system is composed of linear servo motor, precision movable liner mechanism and servo machine. It is driven to move the noncontact laser displacement sensor to scan surfaces through the three-dimensional electric displacement platform, and then the measurement data is processed. The displacement sensor resolution is 2μm; each dimensional electric displacement platform repeated positioning accuracy is higher than 5μm.
An Image Adaptive Watermarking Algorithm Based on Ridgelet Transform and Two-Dimensional Fuzzy Partition
Authors: Yu Hai Yan
Published: August 2011

An image adaptive watermarking algorithm based on ridgelet transform and two- dimensional(2-D) fuzzy partition classification is proposed. In order to obtain a sparse representation of straight edge singularity, the image is first partitioned into small pieces and the ridgelet transform is applied for each piece. After analyzing texture distribution in ridgelet coefficients of each piece, two feature vectors are selected to make up for the ‘wrap around’ effect for FRIT on representation of the image texture. Then the image is classifed into frat regions and texture regions by applying 2-D fuzzy partition classification algorithm with the two feature vectors prepocessed. An watermark sequence is embedded into texture regions with the embedding strength adaptively adjusted by ridgelet coefficients based on the feature of luminance masking and texture masking. Experimental results prove robustness and transparency of the proposed watermarking scheme.
Based on Wavelet Transform and Fuzzy Algorithm of Coal Storage Image Edge Detection Algorithm
Authors: Qu Bin , Zhao Yan Jun , Bai Cheng Yuan
Published: August 2011

Volume and the coal quality of coal measure concerns cost accounting, economic benefit assessment work, when we determine the volume of coal, the camera will be used to obtain image information, and then mosaics and fitting the images, get the clear single pixel level profile. Which obtained a clear outline of a single pixel line is critical important for image fitting.This paper introduced Mallat wavelet modulus maxima edge detection method and fuzzy membership function constructed corresponding algorithm of single pixel level, get edge detection algorithm can obtain good effect.
Research of New Certain Metrics of Network Invulnerability
Authors: Fu Yun , Zhao Hong Li , Yang Hai Tao
Published: August 2011

-elasticity of network that measure the network invulnerability and node resilience measure the node importance are put forward in case of the great amount of calculation and the finite field of application of the existing metrics. The disadvantages of the vulnerability of node，the importance of node ,the tenacity, and the betweenness of node are point out through the comparability. The node resilience and -resilience of network of certain varies types and varies scales networks are calculated and compared, the result of the comparability and analysis is that the metrics this paper confined are effective metrics in measuring the invulnerability in aspects of the field of application and the exactness. the metrics are available in designing the network and evaluating the network invulnerability.
Study and Implementation of Expendable Current Profiler Measurement
Authors: Ren Guo Xing , Cheng Yan
Published: August 2011

This paper conducts research on expendable current profiler measurement. According to the principle of expendable current profiler measurement, this paper builds a mathematical model and discusses the composition of the system as well as the design of the sensor electrode on this basis. At the same time, against its complex work environment, it provides the neural network modification algorithm with the generalization ability, constructs the network model and carries out data modification test using this algorithm, finally it discusses part of the experimental data of the system. Through the analysis of the experimental results, it elaborates the advantages of the system and indicates the future research direction.
Storage on Map Database Based on Dynamic Base State Model with Amendment
Authors: Yang Bo Gang , Zhang Bao Gang , Ren Hai Ying
Published: August 2011

Base state model with amendment is a general method on spatio-temporal database construction. It accesses data with keeping base state changeless and increment variational. In order to improve querying speed, mono-class or muti-class indexes can be added. Improved base state model with amendment adopts to increase number of base states and increment indexes. This paper proposes dynamic base state model with amendment, and base state changes according to actuality, and increment is difference of actuality and database construction state. This method is of save memory space, convenient use of actuality data, and easy to resume history data.
Analysis of Maladjustment Sensitivity and Calibration Method for a Positive-Branch Confocal Unstable Resonator
Authors: Zhang Xiang
Published: August 2011

The effect of intracavity aberration perturbation on output mode structure properties of unstable laser resonator is been experimentally researched using Hartmann-Shack wavefront sensor on the basis of numerical analysis. Results show that intracavity tilt aberration notablely affects outcoupled intensity distribution, but only a small intracavity tilt perturbation will not obviously augment the high-order aberrations of beam phase properties. The tilt aberration, coma aberration and astigmatism will all be brought, and also tilt aberration is the main component when intracavity mirrors have a vertical movement along the direction of optic axis. When adaptive optical elements such as deformable mirrors are adopted for intracavity aberration correction, the correction for tilt aberration should be considered firstly.
Design of a Robust H∞ Controller for a Magnetic Levitation System
Authors: Zhang Geng , Li Jie
Published: August 2011

The magnetic levitation system is nonlinear and inherently unstable. In order to improve its anti-interference performance and its loading capacity, a robust H∞ controller is designed based on the H∞theory. The selection of the weighting function matrix is discussed for both the sensitivity and the complementary sensitivity of the H∞ controller. Simulation and experimental results show that the H∞ controller works effectively with excellent precision and robustness.
A Real Time Inversion Method for Calculating Multi Laser Wavelengths’ Extinction Coefficients Profile of Atmospheric Aerosol
Authors: Hao Dong , Hui Bi Zhao , Sun Yi Yi
Published: August 2011

A new real time inversion method is proposed for calculating multi-wavelength laser atmospheric aerosol extinction coefficients’ profile. The real-time data of atmospheric aerosol extinction coefficients’ profile measured by 0.532μm lidar is utilized together with complex aerosol model of Fascode. The unique features of this method are discussed in detail. Atmospheric aerosol extinction coefficients inversely calculated by this method compared with real time measurements data. The results show that it is feasible to inversely calculate the infrared atmospheric propagation with reasonable accuracy. The real time atmospheric correcting model is established by the method for extinction coefficients at different wavelengths without absorption of water vapor.
CT Analysis Method for Particular Lithology Reservoir Rock
Authors: Zhou Yu , Guo He Kun , Wei Guo Qi , Zhang Yu Juan
Published: August 2011

Core analysis is one of the most necessary means to recognize the geological characteristics of reservoirs. Recently, the oil and gas exploration of particular lithology such as volcanic, conglomerate, mud and carbonate rocks continued to make new breakthroughs. As a result, core analysis for particular lithology reservoir rock is increasingly significant. However, conventional methods of core analyzing have great limitations on particular lithology due to the complex chemical components and variable physical status. In order to obtain accurate experimental data and understand the seepage law of particular lithology, advanced core analysis methods are developed through the application of computed tomography (CT). Through the application of nondestructive CT testing for inner construction of core, and the establishing of CT evaluation criterion for the heterogeneity of particular lithology, the goals of analyzing the features and growth of holes and fractures in core and heterogeneity of core are archived. The evaluation criterion is composed by qualitative evaluation and quantitative evaluation, and gives the corresponding evaluation method and formula. The evaluation criterion provides the basis for CT analysis of particular lithology. The application of CT analysis for 211 cores of particular lithology shows: 1) Most conglomerates develops gravel-edge fractures, growth of the fractures is proportional to the level of gravel and inverse proportional to the degree of compaction. Holes in conglomerate are mainly corroding holes between gravel. The growth of holes is related to the composition of cement and compaction. With the lower gravel level, the number of holes and fractures decline. 2) Most volcanic rocks develop holes; some of them develop big holes or lots of holes. Several volcanic samples contain micro-fractures. The growth of holes and fractures in different volcanic rock categories are equivalent, but the type of holes and fractures are different. This research has opened new experimental means for cores of particular lithology. By increasing the skills of core analysis, this research has increased people’s knowledge of reservoir of particular lithology, and means a lot to oil and gas exploration and development.
Numerical Correction High Temperature of Near-Infrared Colorimetry
Authors: Yuan Li Hua , Wu Guan Hua , Li Ming
Published: August 2011

Colorimetry is commonly used to measure the surface temperature as true one when the surface emissivity is constant. That is, the target is regarded as greybody. But in fact, most materials are not greybody. Spectrum emissivity has to do with wavelength and temperature. And in the most case, it is difficult to assure the exact values of the emissivity .This makes the relative error of the temperature big. Therefore, it is necessary to modify the emissivity response of radiation pyrometer. The factor influencing the spectrum was researched through the application of least square method to create the relationship of spectrum emissivity with wavelength and temperature, at last mathematic model was established which provided numerical correction of infrared two-color thermometry.
Impact of Rough Wall Surface on Electromagnetic Wave Propagation Characteristics in Mine Tunnels
Authors: Yao Shan Hua , Wu Xian Liang
Published: August 2011

In this paper ,the mine tunnels is regard as wave-guide which contains kinds of un-beneficial medium, we have study the formulas of electromagnetic waves propagation attenuation and roughness attenuation, the relations between propagation attenuation and roughness and frequency were simulated. The results show that the influence of propagation attenuation in lower frequency is more obvious, and roughness attenuation is increased rapidly as roughness of coal mine tunnels increasing. But tilted attenuation is stronger than roughness attenuation as propagation frequency increasing.
Design and Implementation of Miniature 3-Axial Fiber Optic Rate Sensor
Authors: Wu Jun Wei , Miao Ling Juan , Wu Yan Ji
Published: August 2011

The key design and implementation methods of Miniature 3-axial Fiber Optic Rate Sensor are described in detail. Based on plenty of theoretical analysis and experimental validation, effective measures and key technology on optical components, fiber coil technics, assembly methods, control circuits and structure solidity are adopt and summarized. Finally, its main engineering performance is tested and listed detailedly. From experimental results and engineering practice, we can conclude that Miniature 3-axial Fiber Optic Rate Sensor has the performance of high reliability, radiation resistance, low air pressure resistance, temperature resistance and high reliability, and can be widely used in some special and professional fields. More importantly, it greatly promotes the development of fiber optic sensing and inertial technology application of China.
The Design of the Detection and Localization of the Color Image for the Location of Road Traffic Signs
Authors: Ma Xin , Li Hong Li
Published: August 2011

An intelligent recognition algorithm of the combination of image edge detection and image area segmentation is designed in this paper. The image edge detection adopts the edge detection method of color feature space. The color multi-threshold region segmentation method is used the image area segmentation. The algorithm is mainly used for the detection and location of city road traffic signs. Some traffic scene images are processed by this algorithm. The simulation results show that the combination algorithm has better segmentation ability. It is helpful to realize the intelligent recognition of road traffic signs.
Study on the Intelligent Electric Power Monitor Based on ARM
Authors: Liang Da , Lin Chang Chuan , Xiao Guo Zhuan
Published: August 2011

To improve the electric power quality has become an important issue in building an intelligent electric power grid. In this paper, the ARM chip and the fuzzy controlling method were adopted to develop and study an intelligent monitor. The design of the hardware and software was implemented. The experiment’s results demonstrate that the monitor can improve the precision of the collected electric data and the power distribution efficiency and the reliability. It can be used in the ship power systems, industry, daily life and so on.
Experiment Equipment of Newton's Second Law Based on Photoelectric Sensor
Authors: Sun Hong Qiang , Yang Mei , Zhang Wen Zhuo , Yu Jing Sheng
Published: August 2011

Using photoelectric sensor collects two physical quantities, displacement and time of the experiment car. The signal realizes conditioning after amplifier-filter circuit. It is transferred to computer through the serial portion of RS-232 after the disposing of Single-chip Computer. The experiment software designed by ourselves calculates size and relationship between the physical quantities relevant to acceleration, and draws the relevant figures of the physical quantities.
Analysis Methods of Power Characteristics for Hydraulic Pressing of the Traction Drive Device
Authors: Wei Chao , Shen Chu Jing , Yuan Shi Hua
Published: August 2011

Analysis Methods of Power characteristics for hydraulic pressing of the traction drive device are studied. The operating principle of hydraulic pressing of the traction drive device is analyzed, Probe into the rule of variation of the inner and outer Friction Pairs about the traction coefficient and the transmission ratio, A mathematical model of transmission traction characteristics is built up based of the Elasto-hydrodynamic lubrication theory, to explore the power characteristics of the friction pairs under different slip roll ratio and normal loading force, and the transmission of the input power and output power under different total sliding rate and loading force. The results showed that the transmission power of hydraulic pressing of the traction drive device is increasing when the normal loading force is increasing under some sliding Rate, but the transmission power tend to stable when the shearing stress is close to limiting shearing stress；and with the Sliding Rate increasing the transmission power increase under some normal loading force, but the transmission power eventually tend to stable when the Shearing Stress is close to limiting shearing stress.
Application of Adaptive Fuzzy-PID Control in Servo Spindle Rigid Tapping
Authors: Lu Jun , Zou Hai Xin , Shen Lie , Zou Xiang Jun
Published: August 2011

Rigid tapping of NC Tapping center is an electromechanical control system which is strongly nonlinear, uncertain and difficult to precise modeling. It is unavoidable to be affected by some nonlinear and uncertain factors such as friction and mechanical resonance. The traditional control method could not fundamentally solve the contradiction between rapid stability and high stable precision of the system response. As an intelligent control method, fuzzy control is actually a kind of PID regulator, and it exists a strong complementary to PID control in the system dynamic and static characteristics. This paper introduced fuzzy adaptive PID control applied to NC rigid tapping in engineering practice, the control method need not to build the controlled object, using mathematical model of fuzzy reasoning method for the online PID parameters auto-tuning, it met the system well for the rapidity and smoothness of comprehensive index requirement and technical realizability, finally through test platform test, numerical control machine tool actual tapping was validated.
Research on Two-Position North-Seeking Method Based on the Single Axis FOG
Authors: Li Deng Hua , Zhou Feng , Wu Xi Bao
Published: August 2011

The basic working principle and the two-position north-seeking method based on single-axis FOG(fiber optic gyroscope) is researched in this paper. Improved north-seeking method was proposed to solve the problem in the two-position FOG north-seeking scheme. To Sample in three positions of 0º, 90ºand 180ºseparately and obtain the measurement values of angular rate in these three positions. Then according to the measurement values of angular rate in the first and the third positions to calculate the north-seeking angle, and using the positive and negative pulse outputs of the FOG in the second position to obtain the specific direction information of carrier. So that, accomplish the north-seeking in the range of 0～360° for single-axis FOG. The experiment results showed that the accuracy of the improved two-position north-seeking program based on single-axis FOG is 0.101 (1σ) within 4 minutes.
Research on Transverse Sensitivity Property of Cymbal Piezoelectric Vibration Acceleration Sensor
Authors: Li Cheng Zhe , Li Deng Hua , Zhai Shuang , Li Jin Ao
Published: August 2011

For the problem of higher transverse sensitivity ratio of the cymbal piezoelectric vibration acceleration sensors, a mathematical model of output voltage sensitivity is established which employ orthogonal and array methods to reduce the transverse sensitivity ratio of the piezoelectric vibration acceleration sensor. Two compensation methods are designed. The results showed that the array and orthogonal methods can decrease the effect of the transverse interference of acceleration sensor effectively and control the relative error in a smaller range, improve the measurement accuracy of the sensors.
Research on Brushless DC Motor Speed Control System Based on Passivity-Based Control
Authors: Zhai Shuang , Li Deng Hua , Wu Xi Bao , Li Cheng Zhe
Published: August 2011

Because the nonlinear and strong coupling characteristics of brushless DC motor, the classical PI controller can not control it easily. In order to solve the control problem of brushless DC motor, an improved control method is proposed which based on passivity-based control technology. According to a model of brushless DC motor (BLDCM) that based on Euler －Lagrange (EL) equation, designed a passivity-based controller. The simulation result shows that，compared with the PI controller，this method can not only improve the dynamic response property and anti-jamming ability of the system, but also get a better speed-adjustability.
A Novelty Control Strategy for the Photovoltaic Supercapacitor and Battery Hybrids Storage System
Authors: Yuan Yi , Machmoum Mohamed , Bourguet Salvy , Amelon Nicolas
Published: August 2011

Most photovoltaic (PV) systems can supply continuous energy by using storage applications. Generally, the battery is employed for finishing this aim. The expense of the battery occupies a large part in the whole PV system. However, the constant variations of both photovoltaic panel power product and load power demand reduce the life of the battery. At the same time, for providing several large burst power demands generated by the motor based application startup, the sizing of battery should be enlarged. Both of them increase the cost of the PV system. Therefore, supercapacitor is integrated into this system. With a reasonable energy control strategy among the PV panel, supercapacitor and battery, the battery’s life could be prolonged and its size can be reduced. A PV system with hybrid storage applications is established in the Matlab/Simulink. Two different loads and weather situations are used to prove the efficiency of this control strategy.
Research and Design on Intelligent Outdoor Solar Charging Station
Authors: Shen Yang Chao , Fan Ze Hua , Zuo Guo Jun , Gong Chao Yang , Zhang Wen Jun
Published: August 2011

To solve the current problems of monotonous forms in solar charging and various electrical equipment recharging, an intelligent and multi-functional solar energy charging system was designed, which can charge electric bicycles as well as various digital products. This system also can store electrical energy for LED for night use.
The Motion Control of Clothes Model Robot and Measurement of Clothes Energy Consumption
Authors: Sui Xiu Wu , Qi Xiao Guang , Zhao Han Wang , Li Da Peng , Jiang Ya Ming
Published: August 2011

This paper designs a measurement system of energy consumption for clothes model controlled by robot technology, the system uses DC motor regulated by PWM regulator to drive the worm wheel reducer and the sinusoidal mechanism, then to drive the robot legs to swing forward and backward in sinusoidal step. The sensors detect the rotation speed and torque of the sinusoidal mechanism, the power and energy consumption. The experiments show the system is high in accuracy, excellent in repetition, and suitable for the further research on the principle and evaluation system of the clothes energy consumption.
Study on the Compensation for Mounting Eccentric Errors of Circular Grating Angle Sensors
Authors: Gao Guan Bin , Wang Wen , Xie Li , Wei Dong Bo , Xu Wen Qin
Published: August 2011

The mounting eccentric error is one of the largest error sources for circular grating angle sensors (CGASs). To improve the measuring accuracy of CGASs, one error compensation method based on mounting eccentricity is proposed in this paper. The mounting eccentricity and measuring error of CGASs was modeled after analysis. Six joints mounted with CGASs were used in the eccentric error compensation experiment. The rotation error of the joints was calibrated with a coordinate measuring machine and a gauge block. Then with the calibration data, the parameters of the eccentric error compensation model were calculated. The experimental result shows that after error compensation the rotation angle errors of the joints are reduced about 58 to 543 times.
Experiment Study on Decreasing Blasting Vibration Adopting Large Diameter Hole-by-Hole Initiation
Authors: Yang Ren Shu , Che Yu Long , Yang Guo Liang , Huo Chuan
Published: August 2011

Blasting vibration damage is a major factor in mine safety. Millisecond blasting is an effective means to reduce blasting vibration damage. Taking field test method to study high slope deformation in open pit mines a little bit difference of each quick-fried bore blows up’s blasting vibration damage. Research found that, taking a little bit difference of each quick-fried bore blows up, Slope’s vibration velocity is 0.6cm/s, Compared to initiation by row’s theoretical value reduced by 58.33% , a little bit difference of each quick-fried bore blows up is an effective means to reduce blasting vibration damage, it is great significance for improving the slope stability.