bluuebunny/crossref_metadata_2025 huggingface dataset:
Space Positioning of the 5-DOF Robotic Excavator
Authors: Xie Xi Hua , Zhou Liang , He Qing Hua
Published: October 2011

The carriage positioning of excavator in three-dimensions (3-D) is the precondition of the robotic excavator starting roboticized works. In order to get the carriage position of excavator in three-dimensional space, angle sensors of such joints as bucket, arm, boom, and boom deflection are brought to bear. At the same time, a 2D-inclination sensor is introduced to check the list and pitch angles of the platform, and a rotatory angle sensor is introduced to check swing angle of the platform. And a laser receiver was mounted on the arm to measure the relative height of the arm to the laser beam from ground sender. Then the kinematic model is established, the coordinate transformation matrix of carriage positioning is formulated, and the height of the body relative to the ground is gotten. As a result, the coordinate transformation matrix of the bucket relative to the ground and the digging depth are formulated. That makes the excavator orient bucket precisely and set excavation depth exactly, and make automotive elaborate excavation come true.
Research on the Design of Automated Hemorheology Analyzer
Authors: Wang Jun , Zhu Lian Qing , Dong Ming Li
Published: October 2011

In order to improve the speed and accuracy of the existing product, a new automated hemorheology analyzer is designed and implementation in this paper. In the new analyzer, the whole blood and plasma with different characteristics are tested by different systems, which work in parallel and independently. The design and implementation of the new hemorheology analyzer including hardware and software design are put forward. Experimental results show that the performance of the new instrument, such as efficiency and test speed are both improved in the new instrument.
A Method of Image Texture Feature Analysis Base on Wavelet Decomposition and its Application
Authors: Li Ya Biao , Wang Bao Guang , Li Wen Wen
Published: October 2011

A method for analyzing the textural features of image is put forward by using the wavelet decomposition. That is used to measure color difference of ceramic tiles on-line. A linear array color CCD camera is used to grab the image of ceramic tiles, and then the image is pretreated. Two level wavelet decomposition is used on the ceramic tile image, and the energy feature of each sub-graph is extracted. The energy feature will be used as a feature matrix,and it can be carried out the classfication according to minimum distance classifier. It can reflect spatial relationship of color more effectively, when contrast with the color histogram, which is used as a traditional method. Experiments show that it is effective using wavelet analysis on image processing,and the sort results are approximately in accordance with the artificial detection.
A Model for Calculating the Outlet Flue Gas Temperature of FGD Absorption Tower
Authors: Xu Gang , Tian Yao , Yuan Xing , Yang Yong Ping
Published: October 2011

Theoretical model for calculating the outlet flue gas temperature of limestone-gypsum wet flue gas desulfurization (FGD) absorption tower is important for water consumption calculation. In this paper, the energy balance in the spray zone is analyzed and a model for calculating the outlet flue gas temperature of FGD absorption tower is proposed. An example computation of the outlet flue gas temperature of a typical 600MW class unit’s operation data is introduced, the result has verified the model. A further study of significance analysis has then been made to analyze and simplify the model.
Dynamical Behaviors for a Predator-Prey System with State-Dependent Impulsive Effects
Authors: Dong Ling Zhen , Chen Lan Sun
Published: October 2011

With some theory about continuous and impulsive dynamical system, an impulsive model based on a special predator-prey system is considered. We assume that the impulsive effects occur when the density of the prey reaches a given value. For such a state-dependent impulsive system, the existence, uniqueness and orbital asymptotic stability of an order-1 periodic solution are discussed. Further, the existence of an order-2 periodic solution is also obtained, and persistence of the system is investigated.
Moving Object Detection and Tracking in outside Environments
Authors: Wang Yi Ding , Li Da Qian
Published: October 2011

Background subtraction is a typical method for moving objects detection. The Gaussian mixture model is one of widely used method to model the background. However, in challenge environments, quick lighting changes, noises and shake of background can influence the detection of moving objects significantly. To solve this problem, an improved Gaussian Mixture Model is proposed in this paper. In the proposed algorithm, Objects are divided into three categories, foreground, background and middle-ground. The proposed algorithm is a segmented process. Moving objects including foreground and middle-ground are extracted firstly; then foreground is segmented from middle-ground. In this way almost middle-ground are filtered, so we can obtain a clear foreground objects. Experimental results show that the proposed algorithm can detect moving objects much more precisely, and it is robust to lighting changes and shadows.
FPGA Based Testing Method to Improve Digital IC Testability
Authors: Gong Yin Shui , Li Hui Yun
Published: October 2011

With the development of integrated circuit technology, design for test (DFT) is on the agenda. In this paper, we propose a new method that the non-test part of a SIP chip can be easily tested with the boundary-scan test utilizing the boundary scan chain of the FPGA. The problem of no boundary scan test structure in one (or more) chip in a system-in-package (SIP) can be solved by connecting the interconnection (s) to be tested to the FPGA to form an enlarged boundary scan daisy chain.
A New 3D Cubic Chaotic System and its Circuitry Implementation
Authors: Deng Wei , Wang Yan Feng , Fang Jie
Published: October 2011

A new three-dimensional cubic chaotic system is reported. This new system contains five system parameters and each equation contains nonlinear term. Moreover, two equations of nonlinear term is cubic. The basic properties of the new system are investigated via theoretical analysis, numerical simulation, Lyapunov exponent spectrum, bifurcation diagram, Lyapunov dimension and Poincare diagram. The different dynamic behaviors of the new system are analyzed when each system parameter is changed .An electronic circuit was designed to realize the new chaotic system. Experimental chaotic behaviors of the system were found to be identical to the dynamic properties predicted by theoretical analysis and numerical simulations.
Parameterized Computing System on Structure of Lift Scaffolding Attached to the Wall
Authors: Li Bin , Zhu Bo
Published: October 2011

This paper focuses on the parameterized computing system on structure of lift scaffolding attached to the wall. Taking full advantage of the relevance between finite element analysis and computer programming, VB software as an input interface of the parameterized, and ANSYS finite element software to do the background analysis, the parametric program of APDL is automatically packaged and called when VB is used to do the second development on the ANSYS software. The structural parameterized design system of lift scaffolding attached to the wall is developed in this paper so that the calculation workload of body frame could be reduced. The details of the parameterized design system and related technologies are given in the paper.
Remote Control Based on Android Phone
Authors: Mao Xiao Dong , Wang Da Hu , Zhang Tong , Huang Ke Ming
Published: October 2011

--In the paper we have chosen to create a universal remote control on the Android smartphone. The concept of a universal remote has helped in solving the problem of having different remote controls for different things around the house. Our project will serve to extend the “All in One” capability of a smart phone to include universal remote functionality. This project will use code learning technology as opposed to code entering to ensure that every button is functional when using the smartphone remote control.
Experimental Study on Etched Micro-Structured Fiber Bragg Grating
Authors: Yang Yin Fei , Cao Ye , Tong Zheng Rong , Yang Xiu Feng
Published: October 2011

Here based on the combination of Comsol and the transmission matrix of Matlab, the spectrums of etched micro-structured gratings are simulated and two different modes of etched micro-structured fiber gratings are made in experiment. Etched micro-structured fiber grating is formed by using hydrofluoric acid (HF)-based wet chemical etching or femtosecond laser etching. This can reduce the clad layer along a standard grating partly or entirely and change the transmission feature of the grating. As a result, the thinner cladding layer changes the core propagation features and thus induces a phase delay on the guided mode, leading to the formation of a defect state inside the original grating band-gap in agreement with the phase shift grating theory. The defect state is mainly influenced by three parameters: the length and depth of the perturbation and the surrounding refractive index (SRI).
A Novel Optical Sheet with Microstructures Design in the LED Direct-Lit Backlight Module
Authors: Chen Chi Feng , Lu Li Ming , Jhou Yung Fang
Published: October 2011

A novel optical sheet with double-layer microstructures is proposed to improve the brightness uniformity and optical efficiency in the LED direct-lit backlight module. By means of 2D ray-tracing program design and commercial optical software simulation, we enhance the brightness uniformity from 45.3% with traditional planar diffuser to 82.7% with new optical sheet, and the average brightness is promoted about 10.9% in the same frame of backlight module which internal thickness is only 13mm. Thus, this novel optical sheet with microstructures design is useful for a slim LED direct-lit backlight module.
Chiral Separation of Non-Natural Carboxylic Amino Acid by Capillary Electrophoresis with CD Derivations as Chiral Selective Material
Authors: Li Bao Hui , Tian Bao Juan
Published: October 2011

A capillary electrophoresis (CE) method for the separation of four kinds of enantiomers of non-natural carboxylic amino acid was built while hydroxypropyl-β-cyclodextrin (HP-β-CD) derivations as chiral selective material. Several different β-CD derivatives were tested for the chiral separation of non-natural carboxylic amino acid, and it was proved that HP-β-CD could show better chiral selectivity. The separation of enantiomers of amino acid was obtained by CE in a 50-μm i.d.×60 cm (effective length 45 cm) fused-silica capillary at 18 kV voltage, while 10 mM phosphate acted as running buffer and HP-β-CD served as selective material. The detective wavelength was set at 254 nm.
The Simulation Research of New Induction Heating Power
Authors: Zhao Gang , Shan Chao
Published: October 2011

Along with the maturity of power electronic technology continuously, induction heating technology with its many advantages has been widely used and developed rapidly. However, due to the disadvantages of series resonant induction heating power, such as low input power factor, great grid pollution, it will bring many hazards. This article will make induction heating power network-side input power factor approximate unit power factor with using Active power factor correction technique, and it makes the net side current and voltage be same phase standard sine wave , reduces the network pollution; and with using DC chopper circuit to complete the adjustment of DC voltage, it achieves induction heating power changes. At the same time, using Matlab software for modeling and simulation analysis on the main circuit and control circuit, the simulation results comply with the design requirements and verify the feasibility of the system design.
Comparison of Three Types of NH3-SCR Catalysts
Authors: Su Shu Hua , Feng Shi Ye , Zhao Yuan Fang , Lu Qiang , Cheng Wei Liang , Dong Chang Qing
Published: October 2011

The selective catalysis reduction (SCR) is one of the most promising technologies for NOx reduction at present. There are three types of NH3-SCR catalysts in the market, honeycomb catalyst, plate-types catalyst and corrugated catalyst. This paper firstly describes the preparation of the three types of catalysts, and then analyzes their performance. The analysis indicates the catalyst structure plays an important role on their performance. The honeycomb catalyst and plate-type catalyst are widely utilized in world’s coal power station, which should be due to their excellent capabilities of ash prevention, wear resistance and anti-poisoning.
A Compact on-Line Particle Counter Sensor for Hydraulic Oil Contamination Detection
Authors: Wang Yan Shan , Zhang Mei Ju , Liu De Feng
Published: October 2011

Real-time monitoring of oil contamination in hydraulic system is one of the most effective measures of prevention and early diagnosis for system failures. A compact on-line particle counter sensor based on light-blockage principle for monitoring hydraulic oil is presented in the article. A novel method is used in this sensor, which can calculate the particle number concentration without a metering pump. The experimental results show that the particle counter sensor can measure the concentration as well as the approximate size of the hydraulic oil particles with a high precision.
A Parallelizable Adaptive Method to Update Close-Loop Digital Predistorter for RF Power Amplifiers
Authors: Li Jin Zheng , Xia Wei , He Zi Shu , Zeng De Jun , Kong Xiao Wei
Published: October 2011

This paper presents a parallelizable adaptive method to estimate and update close-loop digital predistorter for RF power amplifiers. The proposed scheme can be realized with multiple processors which can save computational time and be used in real-time implementation. By using a three-carrier wideband code-division multiple access (WCDMA) signal, the scheme is tested in the way of 3 branches in Nios II. Results show that the performance is approximate to that based on RLS algorithm and the time the scheme expensed is much less than that RLS needed.
Generalized Predictive Control for Rotary Inverted Pendulum System
Authors: Gao Qiang , Li Yi
Published: October 2011

Inverted pendulum system is a complex, multivariable, nonlinear, strong-coupling, unstable system of high order. Compared with the straight-line inverted pendulum, rotary inverted pendulum is more complicated and unstable. In this paper, the mathematic model of a rotary inverted pendulum system is analyzed and deduced detailedly by applying the Lagrange method; the control properties and characteristics of generalized predictive control are researched with matlab simulation. Finally, the results of the experiment prove the system controlled by GPC has a better stability and quickness.
Design and Implement of Three-Phase Inverter System with Double Mode of Grid-Connection and Stand-Alone
Authors: Wang Huan , Yang Zi Long
Published: October 2011

Three phase double mode inverter system was researched in this paper, whose input was battery bank system with PV generation. This system can be operated in stand-alone mode by connecting to local load and also in grid-connected mode by paralleling with grid. When in stand-alone mode, system worked as voltage source, while when in grid-connected mode, the output current of inverter was controlled following with grid. A transition algorithm to restrain current inrush and fast detection of switch and grid status make sure the seamless transition between grid-connected and stand-alone. This inverter system has advantage of simple structure and easy to implement, so that it was appropriate for micro-grid. .
Approach of Image Edge Detection Based on Wavelet Scale Multiplication
Authors: Xu Guo Sheng
Published: October 2011

Edge detection is one of the most important techniques in image processing. A new image edge detection approach is presented by wavelet scale multiplication, which has the advantage of magnifying the edge structures and suppressing the noise. The dyadic wavelet transforms at tow adjacent scales are multiplied as product function and image edge is detected by wavelet model maximum. It need not link edge points, realize simply and is usually applied to noisy, low contrast image.
Implementation of Rail-to-Rail Operational Amplifier for Biomedical Applications
Authors: Lee Min Chin , Yang Zth Ru , Hu Zth Jing
Published: October 2011

This paper proposes gain boosting architecture of a rail-to-rail folded cascaded operational amplifier with CMFB scheme that employing fully differential pair amplifier for applications to biomedical signal process. The proposed rail-to-rail folded cascaded single stage OPA is design and implemented using the TSMC 0.35μm CMOS 2P4M process. Based on simulated and measured results , the chip size is with power dissipation about 1.6mW, input common mode votage range from 0V to 3.3 V, maximum DC gain 82 dB, 114 dB CMRR and 86 dB PSRR.
Multi-Fractal Based Fault Diagnosis Method of Rotating Machinery
Authors: Zhang Shu Qing , He Yu Zhu , Zhang Jin Min , Zhao Yu Chun
Published: October 2011

Aiming at complex features of the fault rotating machinery such as nonstationary and nonlinearity, a new method for fault diagnosis based on multi-fractal was introduced. The vibration signals firstly are analyzed by multi-fractal theory and have multi-fractal characteristics. Then the area of multi-fractal spectrum S and the entropy of multi-fractal spectrum Hm were extracted as new criterions to diagnose machinery faults. Results of experimental analysis indicate that the method is effective and it provides a new way in fault diagnosis of rotating machinery.
The Design to Impeller of Desulfurization Agent Powder CaCO3 Grader and Establishing for its Math Model
Authors: Liu Ji Sheng , Zhong Liang
Published: October 2011

This article dissertated the status of classification to desulfurization agent CaCO3, designed a kind of new-type whirlpool grader, dissertated the principle and excellence of its impeller, at last we established its math model.
Experimental Study of the Counter Dual-Swirl Air Blast Atomizer
Authors: Zhao Na , Yu Yong Gang , Zhang Qi
Published: October 2011

With the Phase Doppler Analyzer (PDA), the distribution characteristics of the liquid propellant simulated media produced by the designed counter dual-swirl air blast atomizer are studied. The results indicate that, the maximum axial mean velocity decreases with the increase of the axial distance away from the swirl exit plane, but the uniformity of the distribution along the radial direction are better and the differences among the degree axes decay. The circumferential distribution of the droplets’ diameter is uneven. The uniformity of the droplets’ diameter decreases after increases along with the radial direction. The mean diameters of the droplets increase first, and then decrease with the increase of the radial distance away from the center axis. The distribution of the droplets along the radial direction is better as the spray evolves to downstream.
Application of Single Neuron PID in the Control of Loader Working Device
Authors: Chen Hui Peng , Liu Jian Hua , Chen Guo Jin , Gong You Ping
Published: October 2011

In order to improve the maneuverability and the automation of loader working device, this paper establishes it’s Electro-Hydraulic Servo Position System mathematical model based on the working principle of its Hydraulic System, and designs a position controller for the loader working device using Single Neuron PID Control Algorithm. The tests of simulation were carried out on the platform of Matlab/Simulink. The simulation results show that Single Neuron PID Control Algorithm can improve the system control effect, process its real-time and static-dynamic characteristics with a simple controller.
Adaptive Prediction of Transient Air Fuel Ratio Based on Forgetting Factor Algorithm for a Coal-Bed Gas Engine
Authors: Teng Qin , Gong Xiang , An Peng
Published: October 2011

In order to solve the problems of pumping fluctuations and bandwidth limitation to dynamic air fuel ratio (AFR) control for a coal-bed gas engine, adaptive models for air mass flow rate and fuel gas mass flow rate in intake system and exhaust AFR were constructed by a recursive identification method based on the forgetting factor (FF) algorithm. A linear time-varying equation error model was selected as the structure of the adaptive models. Firstly, the throttle position and crankshaft speed signals were used to predict the air and fuel gas flow rates. Secondly, the AFR was predicted in real time according to the estimated air and fuel gas flow rates. The trade-off between tracking ability and noise sensitivity was realized by adjusting a FF. The experiment validations at transient operating conditions of the engine accelerating and decelerating show that, adaptive recursive models of the air and gas flow rates with a larger FF can not only track the averaging values of the flow rates, but also deal with the phase delays introduced by the filter, the AFR adaptive recursive model with a smaller FF can predict transient AFR accurately.
Polaron to Bipolaron Transition in Conjugated Polymers
Authors: Wen Liu
Published: October 2011

A possible mechanism of polaron to bipolaron transition is investigated based on the well known SSH model. We have studied the dynamical process of collision between two positively charged polarons with same spin in the presence of external electric fields. It is found that when the relative velocity of collision is not very large, the collision leads to a direct transition of two polarons to a bipolaron.
Theoretical Investigation of ZnSe Epitaxy Growth on GaAs(001) Substrate
Authors: Chen Liang Yan , Chen Xi Qu , Zhang Dao Li
Published: October 2011

Theoretical studies of ZnSe epitaxy growth on GaA (001) surface were performed with first principle calculation, the bonding energy of absorbing monolayer atoms, charge and binding properties of the interface atoms were investigated to account for the growth of ZnSe films on different GaAs (001) surface. And it’s concluded that As-terminated stable AsGa (001) substrate placed in Zn atmosphere, with absorption of Zn atoms on AsGa (001) substrate, which can be a counterweight to form a neutral GaAs/ZnSe interface, may be helpful in reducing the defects of the ZnSe epitaxy growth on GaAs (001) substrate.
Isothermal Extrusion Study and Simulation of Magnesium Alloy for Hilt of Electric Screwdriver
Authors: Li Chun Tian , Wang Chang , Hu Ya Min
Published: October 2011

The techniques of isothermal extrusion and mould are designed for the hilt of electric screwdriver. The deformation process is simulated with finite element method software-DEFORM-3D, the force of deformation for the hilt of electric screwdriver is predicted, is 250 KN. The Isothermal extrusion is processed by the pressure machine-YAW-500kN. The project of deformation and the correctness of simulation analysis are verified on the process experiment.
The Forecast for the Abrasive Wear of Metal Materials Aginst Plant Abrasive Based on the Grey Markov Model
Authors: Huang Xiao Peng , Huang Jian Long , Wu Jing Feng , Zhang Ke Ping
Published: October 2011

Metal materials wear loss against plant abrasive of different wear process was obtained by simulation test on the abrasive wear testing machine. On the basis of it, the GM (1, 1) model is established by using grey theory. Then the state of experiment data is divided using markov chain, the state transition matrix is constructed, finally the grey markovian model is established and wear prediction of metal materials against plant abrasive is gained. The results indicate that wear prediction based on the grey markovian model is more precise than the GM (1, 1), model, relative error being only 1.13%
The Dynamics of VaRs with Skew t Distribution for A300 Index in China
Authors: Zheng Cheng Li , Huang Dong Dong
Published: October 2011

The high frequency of financial crises make the risk management of financial asset become the focus of the financial investors and scholars. The traditional VaR based on assumption about the normal distribution of yield is not suitable for the real thing in China. The characteristics of stock market yield in China is fat tail and non-symmetry. In this paper, the dynamics of VaRs based on TARCH model with the skew t distribution are computed and analysed. And then failure rate of VaRs are compared under normal distribution, student's-t distribution and GED distribution. The results show that the most accurate VaR is the one with the skew t distribution, which describes the reality of the stock market better than others.
A Time-Programmable Soft-Start Circuit with Hiccup Control
Authors: Li Yan Ming , Wen Chang Bao , Wen Li Min
Published: October 2011

A time-programmable soft-start circuit with hiccup control for switching regulators is presented. By using a novel soft-start voltage generating circuit, the soft-start time can be set internally and externally by one pin which enhances the flexibility for applications. A hiccup control has also been integrated into the circuit to deal with the problems of current inrush and voltage overshot in short circuit case which can effectively improves the system reliability. The proposed soft-start circuit has been fabricated with UMC 0.35μm CDMOS process successfully, and the detailed experimental results are shown at the end of the article.
Adaptive Decoding for Turbo Codes over CDMA2000 Mobile System
Authors: Yuan Shuai , Bai Min Dan , Zhang Hua Qing
Published: October 2011

As a powerful branch of error-control coding, Turbo codes have been paid a great attention since they are proposed. Due to the powerful error correcting capability, Turbo codes are very attractive for mobile wireless systems to combat channel fading. However, there are many kinds of decoding algorithms for Turbo codes, any of them have merits and demerits. In this paper, we present a new method to decode Turbo codes over cdma2000 mobile system, that is introducing a controller to achieve the purposer of adaptive decoding. And this method make the system more reliable.
An Approach to Reliability Evaluation of Web Services Composition Based on BPEL
Authors: Liang Yuan Ning , Chen Zhe
Published: October 2011

Aiming at the deficiency of research on reliability evaluation of Web Services composition models, basing on the theories and methods of stochastic Petri net, this paper proposes an approach to reliability evaluation of web services composition based on business process execution language (BPEL). Firstly, the Web Services composition model is analyzed and built basing on the stochastic Petri net, and then the BPEL processes are transformed into composite service process Net model (CSPNet) correspondingly. Combining with the reliabilities of component services and the structures of CSPNet, the reliability formula of several composite services are obtained. Finally, a recursive algorithm is built to evaluate the reliability of Web Services composition. The experimental results show that the approach to reliability evaluation of web Services composition based on BPEL is simple, tractable and efficient.
An Improved K-Means Based Method for Fingerprint Segmentation with Sensor Interoperability
Authors: Yang Zhi Guo , Li Ying , Yang Gong Ping
Published: October 2011

Fingerprint segmentation is an important step in an automatic fingerprint recognition system. Due to applications of various sensors, fingerprint segmentation inevitably suffers from sensor interoperability problem. K-means algorithm is one solution to address the sensor interoperability problem in fingerprint segmentation. However, the traditional k-means based method does not well deal with the border between the foreground and the background. The over-segmentation of foreground area may appear and some important minutiae are lost. To effectively address the issue, we propose an improved k-means based segmentation method with sensor interoperability called ISKI. ISKI performs the secondary determination to the blocks which have similar distances with the two cluster centers after k-means clustering. The proposed method is applied on a number of fingerprint databases which are collected by various sensors. Experimental results show our proposed method significantly improves the accuracy of segmentation.
3D Novel Face Model Based on Surface Stitching
Authors: Ge Yun , Sun Yan Feng , Yin Bao Cai , Tang Heng Liang
Published: October 2011

3D face sample is an important data platform for model training, algorithm design. Subject to the constraint of data acquisition equipment the size of current 3D face databases are relatively small and insufficient. To solve this problem, this paper presents a modeling way for generating 3D novel samples based on surface stitching. First we use morphable model to build a global model. Then, we replace each patch of the global model based on surface stitching. We demonstrate that with appropriate choice of local models it is possible to reliably generate new realistic face samples.
Automated Generation of Web Service Test Case
Authors: Liu Sheng Lan , Li Jun Yi , Sun Lu Lu
Published: October 2011

Software testing is an important technique that used to assure the quality of Web application. Test case automated generation is a crucial aspect of Web Service testing. Test case automated generation for Web Service includes test date and operation sequence generation. To resolve the problem that operation sequence couldn’t be generated automatically, this paper presents a new method. Firstly, a directed graph which used to express the relationship among the operations of Web Service is constructed, and then an operation sequences generation algorithm base on the directed graph is proposed. The redundancy of operation sequences is checked in this algorithm in order to avoid redundant test cases generation. A case study shows that the method is feasible.
Camouflage Target Identification Based on Hyperspectral Imaging System
Authors: Ding Na , Gao Jiao Bo , Wang Jun
Published: October 2011

A novel system of implementing target identification with hyperspectral imaging system based on acousto-optic tunable filter (AOTF) was proposed. The system consists of lens, AOTF, AOTF driver, CCD and image collection installation. Owing to the high spatial and spectral resolution, the system can operate in the spectral range from visible light to near infrared band. An experiment of detecting and recognizing of two different kinds of camouflage armets from background was presented. When the characteristic spectral wave bands are 680nm and 750nm, the two camouflage armets exhibit different spectral characteristic. The target camouflage armets in the hyperspectral images are distinct from background and the contrast of armets and background is increased. The image fusion, target segmentation and pick-up of those images with especial spectral characteristics were realized by the Hyperspectral Imaging System. The 600nm, 680nm, and 750nm images were processed by the Pseudo color fusion algorithm, thus the camouflage armets are more easily observed by naked eyes. Experimental results confirm that AOTF hyperspectral imaging system can acquire image of high contrast, and has the ability of detecting and identification camouflage objects.
Characteristics of Yichun Late Triassic - Early Jurassic Monzogranite
Authors: Sun Nai Quan
Published: October 2011

As building material, Granite has been extensively used. It is important to clear the geochemical characteristics of granites. The paper introduce the Late Triassic-Early Jurassic monzogranite, it mainly located in the south of Yichun area, which were intruded by medium grain monzogranite and syenogranite in Late Triassic-Early Jurassic. According to previous information, this granite distributed in Tangwanghe is widely in the south of study region. Rock type is coarse-medium grain porphyritic biotite monzogranite amphibole-bearing, the edge of the granite (Yishan Forest western) with a flow structure (once believed as gneissic structure), which was classified as Late Carboniferous coarse grained porphyritic gneissic monzogranite in 1:25 million regional geological survey. According to the SHRIMP dating from monzogranite gain the age is 201.5±2.9Ma, showing that the granite was formed in Late Triassic-Early Jurassic.
Depositional Patterns of Dominant Sedimentary Time Units’ Reservoir in Daqing Oilfield
Authors: Fan Guang Juan , Zhao Yue Jun
Published: October 2011

Take the example of the PⅠ3 sublayers of the Twelve-section in the Xing region of the Daqing oilfield, in this paper, to analysis depositional patterns of reservoirs. To make a effectively reasonable development adjustment, correlation methods were raised, which are well-well、plane well net and identical formation cause boundary remotion according to fluvial sedimentology and high resolution sequence stratigraphy new theory, in order to solve the difficult question of sublayers’ unification and correlation in complicated fluvial-delta strata. To distinguishe one subfacies and seven microfacies, and then to establish logging microfacies model. The single sand body of identical formation cause is delibrately depicted. Finally, to establish three reservoir depositional patterns, which are large-scale compound type channel sandbody, medium-sized distributary channel sandbody, small size distributary channel sandbody, respectively.
A High-Efficient Data Model of Road Network in Vehicle Navigation System
Authors: Li Yan , Gao Yang
Published: October 2011

Vehicle navigation system (VNS) is a world acknowledged efficient way of solving the urban traffic problem, and road network database is one of the core component parts in the system. In order to improve performance of VNS, this paper conducts a research on data organization technique of road network, and proposes a novel data model of road network, which includes spatial index and topology structure. Firstly, some common spatial index structures, such as regular grid index, R-tree index and quad-tree index, are studied, and a novel spatial index structure based on “hierarchical quad-tree and R-tree” index of two ranks is proposed. This structure can greatly reduce the access time of map data and raise index performance. Secondly, a topology model of road network based on arc-relation is presented, which can effectively solve turn penalty problems in the conventional topology model based on vertex-relation and represent real road network. Thirdly, a real topology storage structure using adjacency list is designed and a corresponding creating algorithm is put forward. Finally, the tests on the practical system prove that the proposed model effectively support kinds of data-processing and greatly raise the performance of the system.
Design and Realization of Multi-Stage Traffic Signal Controller of Variable Phase
Authors: Xu Hong Ke , Yan Hang , Cai Chao , Li Shu Guang , Yan Mao De
Published: October 2011

The present traffic controllers are most run in 2,3 or 4 phase mode at single point intersections, but the transition of different phase modes during traffic controlling is not flexible. In view of this deficiency, a multi-stage traffic signal controller of variable phases was designed and realized. It is equipped with a single chip microcomputer as the core, signal lights driver circuit, real-time clock, keys and LCD display modules etc. By means of physical simulation, the results show that this controller can run reliably according to system parameters and achieve automatic transition of 2, 3 or 4 phase mode in different stages, thus it also is proved that this controller is more flexible and efficient to control traffic flow.
Effect of Hydrogen Yield by Thermophilic Anaerobic Fermentation from Mixed Organic Wastes
Authors: Chen Jung Hsing , Wang Kuen Sheng , Vu Dinh Hieu
Published: October 2011

This study investigates the characteristics of an anaerobic fermentation for hydrogen yield, using sewage sludge and simulated food residues as substrates inoculate with cow manure. The moisture content was controlled at less than 80% to promote the concentration of substrates and minimize the generation of fermentation liquid, thus eliminate the subsequent treatment problem. The effects of fermentation temperature on hydrogen yield were characterized by batch fermentation between 50°C and 75°C, separated by 5°C increments. The results indicate that the 60 oC batch showed specific hydrogen yield and specific hydrogen conversion rate were relatively high, 39 mL-H2/g-VS and 4.00 g-H2/g-H of VS%, respectively. However, the average hydrogen generation rate, measured around the exponential growth phase of the batch, occurred at 65 oC batch. Furthermore, in fermentation experiments with mixed substrates at 60 oC and 65 oC series, both have an optimum mix ratio by weight, the ratio of sludge, simulated food residues and cow manure were found to be 2 : 1 : 1. Herein 60 oC series has higher cumulative volume than 65 oC series in this study. Pretreatment of the fermentation substrates by acid, alkali, heating, and agitation may affect the hydrogen fermentation characteristics. The results indicate except acid treatment poor for it, the others can enhance the hydrogen yield.
Electric Heating Power Optimization of Natural Gas Pipeline
Authors: Zhang Chun Liang
Published: October 2011

After the analysis of gas flow, energy consumption is mainly in the process of heating gas pipeline and natural gas throttle. For this problem, this paper, heat transfer, thermodynamics, computational fluid dynamics are used, the pipeline throttling, convection of natural gas in the pipe and the heat transfer between the gas, wall panels, heating cable, insulation, soil and the atmosphere are all considered, thermal analysis model between the wellhead and the gas gathering station is established, the electric heating power on the gas pipeline is optimized, the optimal electric heating power can be calculated when the temperature of wellhead and gas gathering station is expected to reach are known. The effect of tube diameter, gas volume, surface temperature on the heating power is analyzed.
Optimal Estimation for Multiple Packet Dropouts Systems with Colored Measurement Noise
Authors: Yang Li Xin , Zhang Li Jun , Guo Li Dong , Jia He Ming
Published: October 2011

This paper is concerned with the optimal estimation problem for multiple packet dropouts systems with colored measurement noise. Using the latest received measurement value to replace the current missing data. Then, based on the augmented state space model, the optimal estimators including filter, predictor and smoother are developed via an innovation analysis approach for multiple packet dropouts systems with white and colored measurement noises. Finally, simulation results show the effectiveness and superiority of the proposed estimators.
Research of the Cloud Computing Applications in Smart Mobile Phone
Authors: Jin Jun , Fan Chun Xiao , Wu Yue Xin
Published: October 2011

Cloud computing as a new model of information technology, which is emerging as computing concept that promises provision of computational resources on demand and abstraction of technical details from the clients, in the IT sector has attracted more and more attention. Nowadays, with the popularity of smart mobile phones, the increasing functions of smart mobile phone could not meet the requirements of users. To solve this problem, cloud computing is applied in smart mobile phone. Finally, the detail of the current station of the application of cloud computing in smart mobile phone and some introductions of how to develop the application will be introduced.
A New Mechanism of Database Encryption
Authors: Fan Lin Na , Liu Jun
Published: October 2011

In order to improve the security of database system and resist threat from all aspects, especially the threat from database administrators, the paper designed a new database encryption system. In this system sensitive information is encrypted and establishes ciphertext address index table for it. Encryptions for character fields and numeric fields have different processing methods. Decryption key should be synthesized by both client and server. System can execute SQL query like equality queries, range queries and so on which are difficult to deal with after encryption. The analysis shows that the system has better security.
Simulation and Experimental Research on Crosstalk of Multiconductor Cable’s Core Lines
Authors: Wang Chuan Chuan , Zhu Chang Qing , Gu Zhi Feng
Published: October 2011

In order to research the crosstalk of multiconductor cable’s different core lines, based on finite-difference time-domain (FDTD) method, the Crosstalk of the four core lines cable without metal shield layer is researched by simulation. Results show that because of the cable’s distributed parameters, the far end voltage of disturbing core line is smaller than near end voltage, the voltage of disturbed core lines is smaller than that of disturbing core line evidently. But when cable is working in thunder and rain, the grounding line of the cable may induce very high voltage, and the high voltage may disturb the core lines of cable that used to transfer useful signals, so the crosstalk can’t be neglected. Experiment is done with four core lines cable without metal shield layer that lay on the earth. Experimental and simulation results are nearly same, which are compared. Because of the influence of experimental loss waste, wire connection and so on, voltage got by experiment is smaller than that got by simulation. Results show that FDTD method is effective in analyzing the influence of the lightning voltage signal.
Single-Carrier Frequency Domain Equalization and Wireless Applications
Authors: Xia Ming Fei , Wang Yong Chuan , Lv Gui Zhou
Published: October 2011

In recent years, single-carrier system has again become an interesting and complementary alternative to multi-carrier system such as orthogonal frequency division multiplexing (OFDM). This has been largely due to the use of frequency domain equalizer implemented by means of fast Fourier transforms (FFT), bringing the complexity close to that of OFDM. This paper aims at providing an overview of single-carrier frequency domain equalization (SC-FDE) and its Wireless applications. We review the brief history and system model of SC-FDE, and the integration of SC-FDE and other wireless transmission techniques. We also present several possible future research topics about SC-FDE.
Space-Time Coding Technique Based on Four-Antenna Transceiver System
Authors: Chu Yan , Deng Chun Hua , Shao Yan , Wang Hai Guang
Published: October 2011

Space-time block code, as one of the space-time codes, greatly improves the performance in the cooperative wireless communication systems by the use of space and time diversity. However, traditional STBC can’t enhance the overall transmission rate and there is no form of complex codes with the rate of 1 when the number of antenna is more than 2. In order to design codes with full-rate, we refer to quasi-orthogonal STBC whose generator matrix is orthogonal between its subspaces. In this paper, based on the combination of QO-STBC and Self-adaptation technology, we propose a new plan of space-time coding which dismisses the interference among symbols when decoding and advances the coding capabilities in the context of full-rate transmission, finally we justify the new plan through lots of computational simulations.
Effect of Bridge-Soil Interaction on Behavior of Integral Bridge
Authors: Yu Tian Lai , Awad Mohammed
Published: October 2011

In this paper analytical evaluation of influence of bridge-soil interaction on the structural behavior of integral bridge with adjacent concrete box beams deck subjected to temperature rise was performed. Three different soil conditions loose, medium, and dense sand for the uppermost layer soil adjacent to abutment and abutment column were studied. Long-term, field monitoring was performed on FuYu bridge located in Heilongjiang province, China. The recorded data was used to validate the accuracy of a finite element model of this bridge which explicitly incorporates the nonlinear soil spring response. The finite element analysis indicated that soil condition adjacent to the abutment and abutment column is important factor affecting the response of the integral abutment bridge to thermal loads in terms of soil pressure behind the abutment, and axial forces and moments in the composite deck. As the soil varied from loose to dense condition the soil pressure behind the abutment increases more than 4 times and axial forces in the bridge deck increases by about 50% and bending moments in the composite deck increases by about 40%.
Integration Matching Algorithm on Gravity Aided Underwater Navigation
Authors: Chen Yun Fang , Zhong Ruo Fei , Shi Bo
Published: October 2011

Marine gravity aided INS navigation, in which Gravity anomaly and gravity gradient of earth gravity field from sensors sensitive to gravity have been supplementary information aided to correct positioning error accumulated with time to achieve precise navigation and graphic trace, has been a fervent and frontier issue in underwater passive navigation technology in application to Autonomous Underwater Vehicle (AUV). Core theoretical technology of gravity aided INS navigation was matching algorithm, in which Terrain Contour Matching (TERCOM), Sandia Inertial Terrain Aided Navigation (SITAN) and Iterative Closest Contour Point (ICCP) were three typical representatives based on gravity reference map. However, these algorithms more or less had some limitations in certain conditions such as a relatively larger INS positioning error. Aiming at the application limitation that positioning error from INS were commonly large when after a long voyage AUVs entered into the region in which gravity could be used to matching, above three algorithms were integrated to use on base of expounding their algorithm models, computation progress and advantages and disadvantages analysis, then integration theory, algorithm design and model foundation were presented to meet practice application demand better.
Lidar Measurements for Comparison of Atmospheric Aerosol Extinction and Scattering Properties over Lanzhou, China
Authors: Cao Xian Jie , Zhang Lei , Quan Xiao Jing , Zhou Bi , Bao Jing , Li Xia
Published: October 2011

The aerosol comparison experiment was conducted in the Semi-Arid Climate and Environment Observatory of Lanzhou University since March to April 2007 with the measurements of two micro-pulse lidars MPL-4B and CE370-2. In the paper, the differences of aerosol extinction coefficient and optical depth retrieved from the observations of MPL-4B and CE370-2 are analyzed, and the results show: the aerosol extinction coefficient retrieved from the observation of MPL-4B is in general smaller than that from CE370-2, and the difference mainly exists in the low layer, while their trends of vertical profiles agree well; the aerosol optical depths from the observations of MPL-4B and CE370-2 correlate linearly rather well with the coefficient of 0.71, and the aerosol optical depth retrieved from the measurement of MPL-4B is less than that from CE370-2 in whole.
Ethanol Production from Non-Detoxified Steam-Exploded Corn Stover Subsequent Enzymatic Hydrolysis by Two Toxin-Tolerant Yeast Strains
Authors: Men Xun , Yang Xiu Shan , Tian Shen
Published: October 2011

Fermentation process for ethanol production from steam-exploded corn stover using toxin-tolerant yeast strains was carried out in order to reduce the water consumption and operation cost. The substrate from steam-exploded did not undergo a detoxification process by wash, and was directly hydrolyzed by enzymes. Two toxin-tolerant stains, Y1 and Y5, were tested to ferment the enzymatic hydrolysate slurry directly to ethanol. In the enzymatic hydrolysate slurry containing inhibitory compounds, the strain Y1 and Y5 could convert the sugar to ethanol with ethanol concentration of 47.0 g/L and 47.2 g/L corresponding to 95.9% and 96.4% of the theoretical maximum, respectively.