Loading...

Table of Content

      
    20 April 2013
    Volume 43 Issue 2
    Articles
    Implementation of Camera Link on Virtex-5 FPGA
    WANG Gang1,2, WANG Shi-gang3, LIU Cai1*, GAO Kai3
    JOURNAL OF SHANDONG UNIVERSITY (ENGINEERING SCIENCE). 2013, 43(2):  1-5. 
    Abstract ( 494 )   PDF (1874KB) ( 2234 )   Save
    References | Related Articles | Metrics

      In order to solve the problem that Camera Link standard interface used by the current industrial camera and the image acquisition card realize only by making use of special integrated circuit, the field programmable gate array (FP-GA) of Virtex5 series-the latest product of Xiling was used, and the very high speed integrated circuits hardware description language (VHDL) programming was also used to realize the logical sequence and signal control circuit of the Channel Link deserializer and the Frame Grabber on the Camera Link interface. Based on the error rate test and the integrity test of signal acquisition on at Camera Link interface, it was verified that the principle of system design was correct the acquiring normal image in the condition of high bit error rate was reliable. After applying designs of this system, the resource transplantation was processed more effectively among the same series of FPGA, the hardware circuit was simplified, the development time was save by more than 50%, and the integration of the system by 75% increased.

    Head detection algorithm based on mathematical morphology and HSI color space
    ZHAO Jun-wei1, HOU Qing-tao2, LI Jin-ping3, PENG Bo4
    JOURNAL OF SHANDONG UNIVERSITY (ENGINEERING SCIENCE). 2013, 43(2):  6-10. 
    Abstract ( 455 )   PDF (1630KB) ( 3247 )   Save
    Related Articles | Metrics
      An approach of head detection was proposed to meet the requirement of the reducing people counting time in real-time video monitoring. A hair color model was established in HSI color space, and the image binarization was processed by considering the range of hair gray-level. The mathematical morphology dilation and erosion preprocessing algorithm was presented. Then, dilation and erosion algorithm was used again after image edge detection in order to get several candidate areas. At last, the geometrical characteristics of contour were used to judge whether these areas head or not. Experimental results showed that this algorithm was fast and effective, which could meet the real-time needs of intelligent video surveillance.
    Passwordauthenticated  key exchange protocol based on certificateless key encapsulation in  the standard model
    YANG Jun-han1, CAO Tian-jie1,2
    JOURNAL OF SHANDONG UNIVERSITY (ENGINEERING SCIENCE). 2013, 43(2):  11-17. 
    Abstract ( 361 )   PDF (1401KB) ( 1069 )   Save
    Related Articles | Metrics

    To guarantee the security of exchange protocol, a novel passwordauthenticated key exchange protocol without random oracle model was introduced. Clients’ identity information was delivered by the certificateless key encapsulation mechanism. The security of the proposed protocol was proved in the standard model based on decision DiffieHellman (DDH) assumption. Security analysis showed that the provided protocol was forward security and achieved mutual authentication, which could resist multiple attacks.

    A new multi-label learning algorithm based on semi-supervised learning
    LI Ya-lin1,2, ZHANG Hua-xiang1,2*, FENG Xin-ying1,2
    JOURNAL OF SHANDONG UNIVERSITY (ENGINEERING SCIENCE). 2013, 43(2):  18-22. 
    Abstract ( 296 )   PDF (831KB) ( 1220 )   Save
    Related Articles | Metrics

    Multi-label learning usually has many unlabeled samples. Combined with co-training method, this research made full use of the unlabeled sampled in dataset, selected the local k-NN(k nearest neighbor) and global k-NN for training to get two classifiers, which could label the unlabeled examples and could be added to the training set. The collaborative training process iterated continuously, until the training finished. The experimental results showed that this algorithm could outperform other multi-label learning algorithms.

    Wood defects recognition based on the convolutional neural network
    XU Shan-shan, LIU Ying-an*, XU Sheng
    JOURNAL OF SHANDONG UNIVERSITY (ENGINEERING SCIENCE). 2013, 43(2):  23-28. 
    Abstract ( 819 )   PDF (2379KB) ( 5347 )   Save
    Related Articles | Metrics

    To improve the efficiency of wood defects identification, a method based on the convolutional neural network was proposed. A convolutional neural network was presented to recognize the wood defect, and the numbers of training samples were determined by an incremental learning method; the corresponding network structure was designed, and the time consumption could be reduced. Experimental results showed that the preprocessing of a complex image was not needed, and the multiclass defects could be recognized with high accuracy, small complexity and good robustness, while the inherent shortcomings of the traditional algorithm were overcame.

    Independent component analysis and co-training based Web spam detection
    GAO Shuang1,2, ZHANG Hua-xiang1,2*, FANG Xiao-nan1,2
    JOURNAL OF SHANDONG UNIVERSITY (ENGINEERING SCIENCE). 2013, 43(2):  29-34. 
    Abstract ( 470 )   PDF (1728KB) ( 1742 )   Save
    Related Articles | Metrics

    Web spam detection is of great significance, and there only exists a small number of labeled pages. Thus, the semi-supervised co-training was used to detect the Web spam pages. The page features were divided into two views, the content view and the link view. First, the independent components of each view were extracted by  the independent component analysis, and then the co-training was used to detect the label of each Web page. Experimental results showed that this method could effectively improve the recognition accuracy of Web spam. The results also verified that two respective independent component analyses of each view were more effective than the other methods.

    Eigenvector selection in spectral clustering based on Bagging
    WANG Xing-liang, WANG Li-hong*, LI Hai-jun
    JOURNAL OF SHANDONG UNIVERSITY (ENGINEERING SCIENCE). 2013, 43(2):  35-41. 
    Abstract ( 508 )   PDF (1485KB) ( 1609 )   Save
    Related Articles | Metrics

    For the spectral clustering algorithm, the largest k eigenvectors of the affinity matrix derived from the dataset were not always able to find the structure of dataset effectively. An eigenvector selection algorithm in spectral clustering based on Bagging was proposed in order to select better eigenvectors. The  eigenvectors were evaluated by pairwise constraints score. First, some eigenvectors were ranked according to their constraint scores, and then the suitable eigenvectors were selected from the ranking list, finally the optimal combination of k eigenvectors was obtained by Baggingbased ensemble algorithm. The better eigenvectors could be achieved. Experimental results on UCI benchmark datasets showed that this algorithm could gain satisfactory prediction results.

    Local surface fitting and topology structure based on timber trunk of point cloud
    YE Wen, YUN Ting*, YE Ning
    JOURNAL OF SHANDONG UNIVERSITY (ENGINEERING SCIENCE). 2013, 43(2):  42-47. 
    Abstract ( 505 )   PDF (2383KB) ( 1385 )   Save
    Related Articles | Metrics

    To obtain the topology structure of local feature is the key point in the point cloud process based on massive measurement, and the efficiency of the algorithm is especially important. For the point cloud that lacked sufficient topology information, the geometry topology information of adjacent points of each data point in the point cloud was first established. Experimental results showed that random Hough alteration pipe reconstruction method established could  achieve better performance on the surface fitting of timber trunk compared with the Bezier method. Then the proposed algorithm showed the reasonability when it was used to simplify the processing of K nearest neighbors searching.

    Finite-time outer synchronization of complex dynamical networks
    LI Wang1,2, SHI Yong2, MA Ji-wei2
    JOURNAL OF SHANDONG UNIVERSITY (ENGINEERING SCIENCE). 2013, 43(2):  48-53. 
    Abstract ( 270 )   PDF (1265KB) ( 1138 )   Save
    Related Articles | Metrics

    The finite-time outer synchronization between two coupled complex dynamical networks was investigated. The continuous finite-time controller was designed to ensure that two networks can achieve outer synchronization in finite time. Sufficient conditions for the finite-time outer synchronization were derived based on the finite-time stability theory of differential equations. Finally, numerical examples were examined to illustrate the effectiveness of the analytical results. The effect of control parameters on the synchronization time was also numerically demonstrated.

    Node-based smoothed cells based on finite element method
    WANG Jian-ming, FAN Xian-hang, PEI Xin-chao, CAO Yan-chao
    JOURNAL OF SHANDONG UNIVERSITY (ENGINEERING SCIENCE). 2013, 43(2):  54-61. 
    Abstract ( 327 )   PDF (2758KB) ( 1481 )   Save
    Related Articles | Metrics

    The new theories of node-based smoothed finite element method (NS-FEM) were discussed by means of comparison with the traditional finite element method (FEM), which proposed formation of the node-based smoothed cells, computational methods of the smoothed strain matrix and the shape functions for NS-FEM. The analyses of typical examples were conducted by matlab, and the results showed that the NS-FEM’s calculation of stiffness matrix was softer than FEM’s, and the displacement and strain energy were the upper limit of solution. Meanwhile, there were higher accuracy of numerical solutions for stress, strain and strain energy, and it would not produce volume lock phenomenon.

    Analysis of structural and seismic performance of  Yongning Gate embrasured watchtower of Xi’an City Wall
    GAO Da-feng, ZHU Song-tao, DING Xin-jian
    JOURNAL OF SHANDONG UNIVERSITY (ENGINEERING SCIENCE). 2013, 43(2):  62-69. 
    Abstract ( 374 )   PDF (3527KB) ( 1418 )   Save
    Related Articles | Metrics

    To gain the technical basis for the protection and restoration of the ancient Chinese timber structures, the embrasured watchtower of Yongning Gate of Xi′an City Wall was studied and simulated by the Sap 2000 software. The friction isolation element was applied to simulate the float connection between column and plinth, and the rubber isolator element was applied to simulate tou-kung layer. In addition, the finite element model of the embrasured watchtower was established and consequently a dynamic analysis was carried out by applying the spring element to simulate the mortise-tenon connection. Through the modal contrast analysis to the three models (the rigid connection, hinge, float connection between column foot and plinth), the comparative results showed that the float connection mode could lengthen structures natural periods, and the first three periods were more obvious, which were longer about 72% and 24% compared to rigid connection and hinge of column foot separately. By the response spectrum and the dynamic response time history analyses to the timber structure model, the dynamic magnification factors of each layer were obtained, which showed that the vibration isolation performance of ancient Chinese timber structure mainly manifested in the column foot, tenonmortise connection as well as the p’utso layer. The structural energy dissipation analysis results showed that the majority seismic energy was consumed by the modal damping (average 74.32%) and the tenonmortise connection (average 11.89%).

    Experimental research on high temperature creep property of stone matrix asphalt mixtures using basalt and limestone aggregates
    CAO Wei-dong, FENG Zhi-gang, LIU Shu-tang, REN Peng
    JOURNAL OF SHANDONG UNIVERSITY (ENGINEERING SCIENCE). 2013, 43(2):  70-75. 
    Abstract ( 332 )   PDF (1293KB) ( 1260 )   Save
    Related Articles | Metrics

    The impact on the high temperature property of stone matrix asphalt mixtures using basalt and limestone aggregates were comparatively studied. Three kinds of SMA mixtures were fabricated using basalt and limestone aggregates, basalt coarse and fine aggregates named B-SMA, else limestone coarse and fine aggregates, named L-SMA, basalt coarse aggregates and limestone fine aggregates, named BL-SMA. The high temperature property of the three kinds of SMA was evaluated and the corresponding Burgers model was established through the bending creep test. Also, the effects on the high temperature proferty of the different combinations of the two kinds of aggregates were analyzed. The results indicated that B-SMA showed the best high temperature property, followed by BL-SMA and L-SMA in sequence The results of the variance analysis on bending creep rate showed that the high temperature property differences between B-SMA and BL-SMA were statistically significant. However, the differences between B-SMA and BL-SMA were insignificant.

    Soil slope and water content on soil slope stability influence experimental study under rainfall
    ZHAO Ji-kun1,2, CHEN Jia-hong1
    JOURNAL OF SHANDONG UNIVERSITY (ENGINEERING SCIENCE). 2013, 43(2):  76-83. 
    Abstract ( 337 )   PDF (2256KB) ( 2198 )   Save
    Related Articles | Metrics

    The inner mechanism between the two influence factors of slope sliding was studied. The artificial rainfall experiments were carried out on three kinds of slopes with 30, 38 and 45 degree angles. Observations of the sliding displacement and water content of five fixed points along the slope surface, and UU triaxial test on soil samples were taken in the same location on the slope. The following rules were finally concluded within the slope and moisture content range of this study. The slope with larger gradient had comparatively longer vertical displacement, which was especially obvious in the upper and middle part of the slope. There was a liner relationship between the mud flow rate and the gradient. The larger the gradient was, the greater the rate of mud flow was. The total moisture level of fixed points related to the gradient. The greater the gradient was, the higher the water content was. The water content changed more greatly at the lower part of the slope. Under the same moisture condition, the soil cohesive strength increased with the gradient increasing. With the same gradient, the cohesive strength increased as the water content decreasing. Based on the above conclusions and numerical simulation test, the slopemudflow rate, the slope positionmoisture content and the moisture contentcohesive strength relations were proposed under the rainfall test condition.

    Coupling analysis of stress dependence and water sensitivity for  the resilient modulus of unsaturated silt soil
    YI Xiao-ming1,2,LI Shu-cai1,WANG Song-gen2,LIU Zhen-qing2
    JOURNAL OF SHANDONG UNIVERSITY (ENGINEERING SCIENCE). 2013, 43(2):  84-88. 
    Abstract ( 269 )   PDF (1559KB) ( 942 )   Save
    Related Articles | Metrics

    The influences of stress and water content on the subgrade resilient modulus were studied by constructing the prediction model. According to the results of repeated loading tri-axial test, the control indicator was researched. The results showed that the resilient modulus presented different changes with the volume stress increasing, which was unsuitable to reflect the stress dependent of resilient modulus. The confining pressure and the deviatoric stress were more appropriate to be the control indicators. Based on the soil water characteristic curve, the relationship between matric suction and water content was analyzed, and the matric suction was used in the prediction model to express the influence of the water content on the resilient modulus. The model could couple the stress dependence and water sensitivity, and also could well reflect the effects of stress and water, which was verified by the experimental results fitting.

    Effects on iron-barite-sand mixed similar material  properties  induced by molding pressure
    ZHANG Xu-tao1,2, ZHANG Qiang-yong1, CAO Guan-hua1, XU Xiao-bin1
    JOURNAL OF SHANDONG UNIVERSITY (ENGINEERING SCIENCE). 2013, 43(2):  89-95. 
    Abstract ( 222 )   PDF (1983KB) ( 1217 )   Save
    Related Articles | Metrics

    Similar materials used in geo-mechanical model test is commonly granular mixtures, and the influence on iron-barite-sand mixed similar material properties induced by molding pressure is remarkable, which was ignored by most researchers. The study of iron-barite-sand mixed similar materials properties was carried out. Under a certain pressure, the physical and mechanical parameters of the similar materials were measured quantitatively. The research results showed that the molding pressure could heavily affect the properties of similar materials. As the molding pressure increasing, the density, the compressive strength, the elastic modulus, the tensile strength and the cohesion force of similar material improved significantly, while the internal friction angle had no obvious change. The suitable similar materials was the key problem of geo-mechanical model test. Under high in-situ stress condition, the molding pressure of specimens should be equal to the compacting pressure of geo-mechanical model. Otherwise, the model test would be distorted or even be lost. Using the iron-barite-sand mixed similar materials, the zonal disintegration of deep tunnel reappeared repeatedly by strictly controlling the pressure.

    Interval-valued approximate reasoning based on  interval-valued similarity measured set
    ZENG Wen-yi1, ZHAO Yi-bin1,2
    JOURNAL OF SHANDONG UNIVERSITY (ENGINEERING SCIENCE). 2013, 43(2):  96-100. 
    Abstract ( 411 )   PDF (1167KB) ( 1133 )   Save
    Related Articles | Metrics

    The interval-valued similarity measure set of interval-valued fuzzy sets was introduced. Based on the interval-valued similarity measure set, the mathematical model of the interval-valued approximate reasoning of interval-valued fuzzy sets, its related reasoning property and its approximate reasoning algorithm were proposed and investigated. Finally, one numerical example was used to illustrate the reasonability and effectivity of the  proposed algorithm.

    Uncertainty degree and falsity degree accumulation theoremin two-valued propositional logic system
    HUI Xiao-jing, ZHENG Feng-xian, REN Pan-long, GAO Qing-qing
    JOURNAL OF SHANDONG UNIVERSITY (ENGINEERING SCIENCE). 2013, 43(2):  101-104. 
    Abstract ( 350 )   PDF (856KB) ( 1122 )   Save
    Related Articles | Metrics

    The falsity degree of a formular was defined according to the randomized truth degree of a formular in two-valued propositional logic, and the falsity degree accumulation theorem was proved by using the  deduction theorem, that was, the falsity degree of the conclusion was not more than the falsity degrees of the premises in valid reasoning, and thus the accumulation theorem could give the truth degree relations between premises and conclusions. Finally, the uncertainty degree accumulation theorem was compared with the falsity degree accumulation theorem, and the results showed that  the two theorems were different  expression forms.

    Thermal behavior of two-stage linear Fresnel reflector concentrator
    L Ming-xin1,2, SONG Gu1, DONG Zhen1, WEI Lu-lu1, LAI Yan-hua1
    JOURNAL OF SHANDONG UNIVERSITY (ENGINEERING SCIENCE). 2013, 43(2):  105-110. 
    Abstract ( 281 )   PDF (2019KB) ( 1145 )   Save
    Related Articles | Metrics

    The thermal performance of linear Fresnel reflector concentrator(LFRC)with secondary compound parabolic collector (CPC) reflector and a single-layer glass cover were studied. A heat transfer model of LFRC system in steady state had been established according to energy balance principle. Based on this model, the influence of wind speed, environment temperature, solar radiation intensity, concentration ratio, working fluid speed and inlet temperature etc. on concentrator thermal performance had been analyzed systematically, and the temperature and energy distribution along the receiver tube were also given. The results showed that through the numerical simulation, the solar radiation intensity, concentration ratio and inlet temperature were recognized as the key factors affecting  the thermal performance of this targeted of LFRC, which could reach 72%, while the environment factors such as wind and temperature had less influences. So it was helpful to increase the length of the receiver to improve the thermal performance.