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Table of Content

      
    20 August 2012
    Volume 42 Issue 4
    Articles
    A self-adaptive classification method for conceptdrifting data streams
    GUO Gong-de1,2, LI Nan1,2, CHEN Li-fei1,2
    JOURNAL OF SHANDONG UNIVERSITY (ENGINEERING SCIENCE). 2012, 42(4):  1-7. 
    Abstract ( 302 )   PDF (2195KB) ( 1289 )   Save
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    A novel method was proposed for classifiying the concept-drifting data streams, which could track concept-drifting of data streams and quickly adapt to this change. After dividing a given data stream into several data blocks, it could choose the representative data from the first one for training model. The proposed method could alleviate the effects from noise and bordering data better, and be insensitive to outlier. Moreover, it used the created model for classifying each of the following data blocks, and used the classification results to dynamically adjust the current classification model. The experimental results showed that the proposed method could not only adjust classification model automatically according to the current status of data streams and quickly adapt to the situation of the concept drift, but also improve the classification performance.

    The manifold learning algorithm′s application in the  Chinese text clustering
    WANG Hong-yuan, FENG Lei, FENG Yan, CHENG Qi-cai
    JOURNAL OF SHANDONG UNIVERSITY (ENGINEERING SCIENCE). 2012, 42(4):  8-12. 
    Abstract ( 464 )   PDF (1429KB) ( 1614 )   Save
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     According to the euclidean distance, the original LLE (locally linear embedding) algorithm chooses the neighborhood. If the data was originated from multiple classes,  the correct neighborhood relationship could not be obtained. In order to solve this problem, an improved MLLE(modified LLE) was proposed. In MLLE algorithm, the distance matrix was modified, which could make the distance longger between classes and smaller within classes, and so could make the neighborhood in one class as far as possible. The test of Chinese text clustering showed that the MLLE algorithm could improve the clustering visualization and the recognition rate.

    A new structured one-class support vector machine with local density embedding
    ZHAO Jia-min, FENG Ai-min*, LIU Xue-jun
    JOURNAL OF SHANDONG UNIVERSITY (ENGINEERING SCIENCE). 2012, 42(4):  13-18. 
    Abstract ( 388 )   PDF (1260KB) ( 1119 )   Save
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    To improve the generalization ability of one-class classifier, more prior knowledge were taken into account on the existed models. A new structured one-class support vector machine with local density embedding (ldSOCSVM) was proposed, which could embed local information of target data into the structured one-class support vector machine (SOCSVM). By means of K-nearest neighbor, the weighted factor was extracted and applied to the corresponding samples by fully utilizing local information with the global ones inherited from SOCSVM, the ldSOCSVM improved the generalization ability. Experimental results on UCI datasets showed that the proposed classifier could achieve better generalization capability compared with related algorithms.

    Study on the cost-sensitive ensemble learning algorithm based on the cloud computing platform
    ZHANG Ling-wei, WAN Wen-qiang
    JOURNAL OF SHANDONG UNIVERSITY (ENGINEERING SCIENCE). 2012, 42(4):  19-23. 
    Abstract ( 315 )   PDF (1845KB) ( 1082 )   Save
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    With respect to the classification of large scale imbalanced data, a distributed cost-sensitive ensemble learning algorithm based on cloud computing platform was proposed. The large scale data was divided on Hadoop cloud computing platform and was used  in parallel learning. Based on the idea of cost-sensitive, a weighted ensemble classifier was achieved, and a distributed cost-sensitive ensemble learning model based on cloud computing platform was developed. Experiment results showed that the recall rate of the minority class was improved significantly and the computational time was shortened by the ensemble learning on cloud computing platform due to the Hadoop parallel mechanism. In additron,  the classification efficiency of the large-scale imbalanced problem was largely improved.

    A ring based multi-hop clustering routing weighting algorithm in wireless sensor networks
    LU Song1, XU Wen-chun2, YANG Yun2
    JOURNAL OF SHANDONG UNIVERSITY (ENGINEERING SCIENCE). 2012, 42(4):  24-28. 
    Abstract ( 241 )   PDF (1394KB) ( 1133 )   Save
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     A ring based multi-hop clustering routing weighting algorithm(RMCRW) was proposed to keep energy balance in the wireless sensor networks. This algorithm considered not only the distance between the inner layer cluster heads, but also the remaining energy of them in the process of relaying data to the inner layer. As a result, the optimal paths could be selected according to the weight. The simulation results proved that the RMCRW algorithm could effectively prolong the network lifetime in large area.

    Recognition of intersected face based on contrast information and  local binary pattern
    CAO Hong-gen1, YUAN Bao-hua1, ZHU Hui-sheng2
    JOURNAL OF SHANDONG UNIVERSITY (ENGINEERING SCIENCE). 2012, 42(4):  29-34. 
    Abstract ( 332 )   PDF (2260KB) ( 2316 )   Save
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    The method of feature extraction based on local binary pattern(LBP) ignored the magnitude of the gray level differences.To solve this problem, a face recognition method based on contrast information and LBP was presented. First, LBP operator was used to extract the LBP histogram sequence (LBPHS) from block graylevel face images,and VAR operator was used to extract the VAR histogram sequence (VARHS). Second, the above two operator were concatenated into a single histogram sequence(LBP/VARHS). Finally, the face recognition was realized based on the nearest neighbor principle. The proposed method could effectively extract the face feature, and greatly reduce the amount of training data. The dimension of the amount of data had nothing to do with the original image size. Experimental results showed that the proposed method could obtain better recognition rate on both ORL and YALE face database.

    An improved DBSCAN algorithm based on the approximate EMD
    ZHANG Hong-bing1, LU Jian-feng1*, TANG Jiu-bin2
    JOURNAL OF SHANDONG UNIVERSITY (ENGINEERING SCIENCE). 2012, 42(4):  35-40. 
    Abstract ( 414 )   PDF (1186KB) ( 1673 )   Save
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    The DBSCAN algorithm is one of the classic clustering algorithms based on the density. When this algorithm was applied to high-dimensional data, the distance measures in common use could not reflect the relationships between instances well, which would lead to the inaccurate clustering. If appropriate distance measures were adopted in high-dimensional space, the clustering result would be improved. To solve the above problem, the approximate EMD (earth mover′s distance) instead of the common distance was used as the distance measure, and the clustering was achieved by finding all densityreachable objects with the method of iterative search. The experimental results showed that the performance of improved algorithm was 6% higher than that of the original algorithm for the high-dimensional text clustering, while there is no obvious difference in time cost. For low-dimensional Iris data, the proposed algorithm could improve the similarity measure between the instances, reduce the number of data points classified as noise points, and boot the performance with 10%. The experimental results also indicated that the proposed algorithm could reveal its effectiveness for high-dimensional data, and could improve the clustering performance.

    A new FastSLAM algorithm based on iterated EKF
    ZHANG Li, ZHAO Chun-xia*
    JOURNAL OF SHANDONG UNIVERSITY (ENGINEERING SCIENCE). 2012, 42(4):  41-47. 
    Abstract ( 368 )   PDF (1583KB) ( 1740 )   Save
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    The traditional fast map building and positioning algorithm for fast simultaneous location and map building (FastSLAM)usually used the extend Kalman filter (EKF)to estimate the robot’s pose and map, which could lead to some problems of linearization error. In order to solve this problem, a new FastSLAM2.0 algorithm based on the iterated EKF was proposed, which were also called IFastSLAM algorithm. The iterated EKF were used to estimate the particle and then to complete the map building and selfpositioning. The experimental results showed that this algorithm could improve the accuracy of estimating particle to slow down the particle degradation, and could maintain the consistency of the map better.

    Hierarchical real-time control system for a hydraulically actuated quadruped bionic robot
    MA Xin1, WANG Wei1, SONG Rui1, RONG Xuewen1, MENG Jian1, LI Yibin1, WANG Bo2
    JOURNAL OF SHANDONG UNIVERSITY (ENGINEERING SCIENCE). 2012, 42(4):  48-53. 
    Abstract ( 343 )   PDF (2141KB) ( 1534 )   Save
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    In order to meet the requirement for real-time and stability, a hierarchical real-time control system was designed and realized for a hydraulically actuated quadruped bionic robot developed by the Centre for Robotics of Shandong University. The hierarchical control system included the environment perception layer, the control implementation layer and the remote control layer. The overall design of the control system was given. Socket-based network communication technology and pipe/thread-based interprocess communication technology were used for real-time communication. The named pipe technology was used for mounting sensor drive model. MySql database technology was used for data backup during the system operation. The experimental results of controlling data acquisition with a laser scanner and controlling a trot gait showed that the hierarchical control system could match the requirements of real-time.

    Diffraction and transmission optical model based edge location algorithm
    TAO Liang1,2, SUN Tong-jing2, LI Zhen-hua2, DUAN Bin2, SUN Xing3
    JOURNAL OF SHANDONG UNIVERSITY (ENGINEERING SCIENCE). 2012, 42(4):  54-59. 
    Abstract ( 316 )   PDF (1805KB) ( 1136 )   Save
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    An edge location algorithm based on optical mechanism was proposed. By the combination of fresnel diffraction theory and transmission attenuation law, the edge of the projection image was precisely located. First, the monochromatic light diffraction model and its limitations in transmission environment were presented. After analyzing the attenuation characteristic of the transmitted light, an intensity distributing optical model dually affected by transmission and diffraction was proposed. Finally, the edge location algorithm was derived. The optical model extended the fresnel diffraction theory to the transmission condition. The edge location was an important one of its applications. For engineering application, the calculation of the attenuation coefficients was given. Therefore, the algorithm was independent on the material of the exposure object. The experimental results proved that the accuracy and the efficiency were superior to operator method.

    Improved RPCA method based on variable forgetting factor and its application in adaptive fault monitoring
    SUN Jing-jie1, ZHAO Jian-jun2*, YAO Yue-ting3, YAO Gang1
    JOURNAL OF SHANDONG UNIVERSITY (ENGINEERING SCIENCE). 2012, 42(4):  60-66. 
    Abstract ( 316 )   PDF (2343KB) ( 1062 )   Save
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    In order to avoid false alarms for time-varying process and missed alarms for weak fault, an improved recursive principal component analysis (RPCA) method based on variable forgetting factor was proposed for adaptive fault monitoring. A new variable forgetting factor style was introduced for online update of the principal component model, and different forgetting factors were set for different parameters. The loading matrix and eigenvalue matrix were updated by applying partial singular value decomposition (PSVD) method to the recursive decomposition of correlation matrix. In addition, a recursive updating method of control limit was proposed to update control limit adaptively. Monitoring results of the working process of a radar transmitter demonstrate that the improved RPCA method could capture the variation of process adaptively to detect fault, and could reduce both false alarms for normal working condition adjustment and missed alarms for weak fault.

    The optimization of rowing bote type based on VOF method
    SONG Kai-ming1, YU Jian2, DING Dong-sheng1, CHU Shao-ling3, ZHOU Yu-qiang4
    JOURNAL OF SHANDONG UNIVERSITY (ENGINEERING SCIENCE). 2012, 42(4):  67-73. 
    Abstract ( 345 )   PDF (2398KB) ( 996 )   Save
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    The rowing boat type was optimized to reduce the rowing resistance and to help the athletes to earn a good competition outcome. RNG k-ε turbulent model and VOF method were used to calculate the flow field and the resistance characteristics, and the velocity and pressure distribution around a single rowing boat was obtained. Experimental results showed the reliability of the numerical calculation. The rowing boat type was optimized and the relationship between resistance characteristic and rowing type was obtained. The results could give some instructions to reduce the rowing boat resistance and improve its performance.

    Design of self-adaptive sliding mode controller with finite time convergence
    ZHAO Zhan-shan1,2, ZHANG Jing3, SUN Lian-kun, DING Gang1
    JOURNAL OF SHANDONG UNIVERSITY (ENGINEERING SCIENCE). 2012, 42(4):  74-78. 
    Abstract ( 363 )   PDF (1345KB) ( 1894 )   Save
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    A new self-adaptive sliding mode controller algorithm was proposed for a class of uncertain nonlinear systems with unknown but bounded uncertainties. The proposed solution  could stabilize the status of these systems in finite time by using geometric homogeneity and integral sliding mode control. In order to solve system uncertainties with unknown but bounded, the corresponding adaptation law was developed to evaluate the gain of the controller. The theoretic analysis based on Lyapunov theory proved that the systems with the proposed controller could be stabilized in finite time. Simulation results showed that the proposed adaptive sliding mode controller could achieve better robustness and adaptation against uncertainties.

    Study on the classifications of surrounding rock and the support measures of the expansive soil tunnels
    LI Shu-chen1, XU Qin-jian1, FENG Xian-da1, HU Shi-quan2, ZHOU Qiang2
    JOURNAL OF SHANDONG UNIVERSITY (ENGINEERING SCIENCE). 2012, 42(4):  79-85. 
    Abstract ( 352 )   PDF (2240KB) ( 1679 )   Save
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    The engineering geological properties of the expansive soil tunnel were studied by means of statistical analysis and laboratory test. The physical and mechanical properties of the expansive soil were completely studied. And the  subclass refined classification standards of soil tunnel were proposed, which had practical reference value. Combined with parameters provided by images of geological radar, the subclass refinement of expansive tunnel was performed, which could amend the tunnel support parameters and improve the overall support system. The results provided a theoretical basis for the reasonable evaluation of the characteristics and the design of support parameters of the expansive soil, which was of practical significance for future design and construction of the expansive soil tunnels.

    Anti-earthquake mechanism of pervious concrete pile composite foundation
    CUI Xin-zhuang1,2, WANG Cong1,2, ZHOU Ya-xu1,2, ZHANG Na1,2, GAO Zhi-jun1,2
    JOURNAL OF SHANDONG UNIVERSITY (ENGINEERING SCIENCE). 2012, 42(4):  86-91. 
    Abstract ( 346 )   PDF (2434KB) ( 978 )   Save
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    With the advantages of both granular piles and rigid piles, pervious concrete piles were especially suitable for earthquake-resistance foundation. To study the antiearthquake mechanism of pervious concrete pile composite foundation, the acceleration response and the development and dissipation of excess pore water pressure during the earthquake were numerically simulated. The dynamic behaviors of pervious concrete pile were compared with those of gravel pile and plain concrete pile. The surface acceleration amplification coefficient of pervious concrete pile foundation was obviously smaller than two other pile foundations. Meanwhile, pervious concrete pile predominant period was only half of gravel pile and plain concrete pile foundation, which demonstrated that pervious concrete pile foundation was more effective to avoid the upper building resonance. Besides significant damping effect, the pervious concrete pile foundation also had obvious pressure-reduction effect. The excess pore water pressure induced by an earthquake dissipated quickly because of the high permeability of pervious concrete piles, and the foundation liquefaction was effectively inhibited. Consequently, the draining-damping coupling effect of pervious concrete piles could improve the deformation compatibility of soil during the earthquake.

    Techniques for snow-melting and deiced based on  microwave and magnet coupling effect
    GUO De-dong1,2, SHA Ai-min3
    JOURNAL OF SHANDONG UNIVERSITY (ENGINEERING SCIENCE). 2012, 42(4):  92-97. 
    Abstract ( 369 )   PDF (1858KB) ( 1204 )   Save
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    In order to improve the microwave deicing efficiency of clearing the ice on the road rapidly, the deicing technology of asphalt pavement based on microwave and magnet coupling effect was studied by tests. First, the technological property of magnetite aggregate and magnetite asphalt concrete were tested. Second, the microwave-heated tests were put forth to analyze the heated efficiency of conventional and magnetite aggregates. Finally, the microwave deicing efficiency of asphalt concrete was studied by the laboratory tests. The results showed the technological property of magnetite asphalt concrete could meet the requirements according to specification. The microwaveheated efficiency of magnetite aggregates was about 20 times of conventional aggregates. The microwave deicing efficiency of magnetite asphalt concrete was about 10-20 times of conventional asphalt concrete.

    Finite element analysis of the main floating body of  floating wave power device
    LIU Yan-jun1, ZHENG Bo2, SUN Xing-wang1
    JOURNAL OF SHANDONG UNIVERSITY (ENGINEERING SCIENCE). 2012, 42(4):  98-102. 
    Abstract ( 336 )   PDF (1667KB) ( 1412 )   Save
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    In order to assess the security of the floating wave power generating device, the wave impact force on the primary floating body in extremely arduous condition was calculated. The linear wave theory and Morison equation were employed in the calculation. The finite element model for the wave-power generating device was established by adopting ANSYS software. During the simulation process, interface was utilized to convert the three-dimensional model to Workbench model. The displacement variety and harmonic driving response of the primary floating body with the wave impact force were obtained. The simulation results showed that the stress and displacement variety both reached their maximum values under the impact of the extreme wind and waves, while all within the required security range.

    Biomechanical model of seated human body exposed to vertical vibration
    LIU Fei-fei, LI Jian-ping, CHEN Guo-qiang, LUO Si-te, LI Zeng-yong*
    JOURNAL OF SHANDONG UNIVERSITY (ENGINEERING SCIENCE). 2012, 42(4):  103-107. 
    Abstract ( 373 )   PDF (1380KB) ( 1388 )   Save
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    A 7 DOF (degree-of-freedom) biomechanical model of human on a seat without backrest based on multi-body dynamics theory was developed to predict the biodynamic responses of the seated human body in vertical vibration conditions. The parameters of the model were estimated to satisfy the STH (seat-to-head transmissibility) characteristic defined by a synthesis of published data for seated subjects without backrest support. The parameter identification technique involves the solution of a multivariable optimization function and comprises the sum of squared magnitude and phase errors associated with the seattohead transmissibility target values. The cerebral oxygenation was detected by NIRS to verify the accuracy of the studied model. The results showed that the proposed model could improve the vehicle seating system designs.

    Application study of ion chromatography in marine strata drilling
    YE Ying-gui1, YANG Lan-ling2, XU Ai-hua3*, ZHAO Xu4, HUANG Qiang1, YAN Ji-yu2
    JOURNAL OF SHANDONG UNIVERSITY (ENGINEERING SCIENCE). 2012, 42(4):  108-113. 
    Abstract ( 256 )   PDF (1672KB) ( 1033 )   Save
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    A new method of suppressed conductivity ion chromatography for determination of four kinds of ions Cl-, SO2-4, Ca2+, Na+ was developed. By analyzing the mass concentration variation of four ions, the fluid identification interpretation criteria of Sichuan Basin marine strata was established, which could accurately identify the fluid properties in carbonate formation and judge whether a gas layer or a water layer to be drilled. This criteria could also deduce the opening degree of underground structure by identifying the formation water type to determine the storage conditions of gas reservoir. The results showed that this method had high sensitivity and good accuracy, which could enrich the detection methods of geological exploration and could also provide scientific basis for Sichuan Basin gas drilling.

    N-bio-system dual index grade sequence individualized pattern recognition method and analysis of 1H-NMR fingerprint spectra of Zuogui Pills, Yougui Pills and Jisheng Shenqi Pills
    ZOU Hua-bin1, WANG Li-shuang1, ZHAI Hong2
    JOURNAL OF SHANDONG UNIVERSITY (ENGINEERING SCIENCE). 2012, 42(4):  114-119. 
    Abstract ( 397 )   PDF (1222KB) ( 1188 )   Save
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    Study of the preparation of a novel material by intercalating carboxymethyl-β-Cyclodextrins into layered double hydroxide and its chiral absorption to tryptophan
    ZHAO Jing, LIU Xiao-lei
    JOURNAL OF SHANDONG UNIVERSITY (ENGINEERING SCIENCE). 2012, 42(4):  120-125. 
    Abstract ( 343 )   PDF (1687KB) ( 1065 )   Save
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    A novel carboxymethyl-β-cyclodextrins (CMCD) intercalated layered double hydroxide film was prepared by in situ growth technology. The structure and chemical composition of the intercalated materials were studied by XRD and IR. The XRD analysis showed that the 001 peak of hydrotalcite moved to small angle after intercalation of CMCD, which indicated that the interlayer distance of LDH increased obviously. The asymmetric stretching band of —COO- appeared at 1596cm-1, which indicated that the CMCD intercalated into the LDH interlayer. Furthermore, the chiral adsorption behavior of the intercalated material to the tryptophan at series of concentration was studied primarily. The optical rotations of these filtrates were positive, which indicated that the films preferentially adsorbed the Ltryptophan. The adsorption isotherm was obtained. It was found that the enantioselective adsorption had a maximum adsorption capacity, which was caused by the chiral reorganization of interlayer immobilized CMCD. The amount of the interplay CMCD was determinate, and the enantioselective adsorption was saturable.

    On-line partial discharge monitoring system for XLPE power cable
    SUI Hui-bin1, LI Jing-qiang2, YANG Xiao-juan2, ZHANG Cun-ming2, XU Bin2, YAN Yan2, LIU Chang-zheng2, XU Wen2
    JOURNAL OF SHANDONG UNIVERSITY (ENGINEERING SCIENCE). 2012, 42(4):  126-131. 
    Abstract ( 330 )   PDF (2496KB) ( 1523 )   Save
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    Partial discharge occurred in the cross-linked polyethylene (XLPE) power cable is a serious factor to the power supply reliability of cables and power system. Based on the measuring principle of the current transformer, a Rogowski coil based partial discharge monitoring system for XLPE power cable online monitoring system was proposed. The high frequency electromagnetic coupling sensor was studied, the parameters related to measurement sensitivity were identified, and the Rogowski coil parameters for XLPE power cable partial discharge was determined by experiment. The structure of partial discharge monitoring device and the on-line partial discharge monitoring system based on optical communication cable were designed in detail. The test was carried out on a certain operating cables in a substation. The monitoring data analysis showed the effectiveness of the proposed on-line partial discharge monitoring system for XLPE power cable.

    Experiment and numerical simulation on inherent vibration charact eristics of the new elastic tube bundle
    JIANG Bo1, TIAN Mao-cheng2*, HAO Wei-dong1, LIU Fu-guo1
    JOURNAL OF SHANDONG UNIVERSITY (ENGINEERING SCIENCE). 2012, 42(4):  132-136. 
    Abstract ( 288 )   PDF (2543KB) ( 1025 )   Save
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    An optimizd structure of elastic tube bundle was proposed considering the structure and operating features of the original type. The mechanical properties of the end region of the elastic tube bundle were deduced theoretically, and thorough researches were carried out on the inherent vibration characteristics of the tube bundle by the combinatior experiment  and  numerical simulation. The modes of  the  out-of-plane and inplane vibration, natural frequency of the tube bundle were obtained. The experiment results showed that the bending moment endured in the end section of the new elastic tube bundle was one sixth times less than that of the original tube bundle, which improved the safety property significantly.  The natural frequency was lower than that the original of tube bundle, which make  it easier for the tube bundle to vibrate under the stimulation of external flow. The heat transfer area per unit volume increased by 24.7% accordingly.

    The transient influnce of the electromagnetic launch orbit under the harmonic sinusoidal magnetic pressure
    LIU Wen, LIU Feng, ZHANG Bo-yang, ZHANG Jing-jing, ZHANG Hui
    JOURNAL OF SHANDONG UNIVERSITY (ENGINEERING SCIENCE). 2012, 42(4):  137-142. 
    Abstract ( 425 )   PDF (1767KB) ( 1184 )   Save
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    In order to solve the problem of the lower accuracy of electromagnetic emission-orbital launches and the shorter life of the barrel,The orbit of the gun fired was simulated into the simply supported beam on elastic foundation under the role of the moving load, and the mechanical model of the beam was established using the Euler beam theory. The integral transform and its inverse transform and the method of calculating the residue were used, and the transient response analytical solution of the track under the harmonic pressure was derived. The influnencing factors of the transient dynamic response of the beam outside the viscous damping coefficient, damping coefficient of friction,coefficient of elasticity were analyzed by MATLAB software. Examples showed track beam deflection decreased with the increasing of the viscous outer damping, and with the increasing of the material response of damping, while the elasticity coefficient was less obvious deflection. With the increasement of the elasticic coefficient the deflection curve was a downward trend.