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2015 Vol. 41, No. 4

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Volume 41 Issue42015
2015 Year 41 Volume 4 Issue E-journal
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Design and optimization of improving stability of curvilinear blade-stiffened panels
XU Yuanming, WANG Dong
2015, 41(4): 567-573. doi: 10.13700/j.bh.1001-5965.2014.0257
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Stiffened panels are widely used in the aerospace field as a typical structure. To further expand the design space of straight stiffened panels, an optimization framework for curvilinear blade-stiffened panels was developed based on ModelCenter optimization environment, Catia and Abaqus. Stiffeners ...
Interference characteristics analysis of optical fiber Fabry-Perot cavity with graphene diaphragm
LI Cheng, GUO Tingting, XIAO Jun, FAN Shangchun, JIN Wei
2015, 41(4): 574-579. doi: 10.13700/j.bh.1001-5965.2014.0279
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With regard to the design of optical fiber Fabry-Perot cavity using graphene as sensitive diaphragm, the deflection change under uniformly distributed loads in graphene film was analyzed by finite element method based on the large deflection elastic theory of circular film. The pressure-sensing math...
Sub-pixel X-corner detection and location with directional characteristics
MENG Cai, XUE Jiao
2015, 41(4): 580-588. doi: 10.13700/j.bh.1001-5965.2014.0293
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X-corner points are widely used in camera calibration and visible-spectrum visual tracking system as they can provide not only location information, but also direction information. To accurately detect the location and direction of X-corner points, a new algorithm based on the symmetry calculation o...
Metal molten behavior with ultra high frequency pulsed arc welding
YANG Mingxuan, YANG Zhou, CONG Baoqiang, WANG Qiang, QI Bojin
2015, 41(4): 589-593. doi: 10.13700/j.bh.1001-5965.2014.0246
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Molten liquid metal is the key factor of the fundamental research during welding process, as it is the transfer element between arc behavior and solidification. Researches of the characteristics of molten pool were carried out by ultra high frequency pulsed arc welding (UHFP-AW), especially with the...
Grid generation criterions in hypersonic aeroheating computations
ZHANG Zhichao, GAO Zhenxun, JIANG Chongwen, LEE Chunhian
2015, 41(4): 594-600. doi: 10.13700/j.bh.1001-5965.2014.0288
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Three wall normal grid generation criterions in hypersonic aeroheating computations are analyzed, including mean free path (MFP), and cell Reynolds number based on freestream parameters and wall parameters respectively. A wall parameter prediction method is proposed to avoid trial computations when ...
Demonstration platform for collaborative design of space science missions
DENG Li, HAN Chao, CAO Jinbin, SONG You
2015, 41(4): 601-608. doi: 10.13700/j.bh.1001-5965.2014.0284
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There are several problems during the demonstration process of collaborative design of space science missions, such as strong coupling between sub-system solutions, poor data consistency, difficulty in data modification, and associated relationship between data and demonstration process. In order to...
SEL rate prediction for SRAM using pulsed laser sensitivity mapping
YU Yongtao, HAN Jianwei, FENG Guoqiang, CAI Minghui
2015, 41(4): 609-615. doi: 10.13700/j.bh.1001-5965.2014.0301
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The classical approaches for single event latchup (SEL) rate prediction are based on the rectangular parallelepiped (RPP) model of only one sensitive volume. However, the experiment results of SEL sensitivity mapping of static random access memory (SRAM) show that the device has not only one sensiti...
Analysis of stratospheric lighter-than-air vehicle's aerodynamic characteristics based on large eddy simulation
WANG Yufu, TAO Guoquan, LIU Dongxu, WU Zhe
2015, 41(4): 616-623. doi: 10.13700/j.bh.1001-5965.2014.0535
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Flowing over stratospheric lighter-than-air vehicle (SLV) with spherical capsule shape at supercritical Reynolds number were simulated by using large eddy simulation (LES) method. Meanwhile, the results at different sphere spacing were analyzed and compared so that the influence of different sphere ...
Two-stage acquisition algorithm for DSSS signal based on compressive sensing
CHENG Yanhe, YANG Wenge
2015, 41(4): 624-631. doi: 10.13700/j.bh.1001-5965.2014.0666
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According to the restriction between the acquisition performance and the hardware consumption, a two-stage compressive acquisition method was proposed based on compressive sensing, specifically some coarse acquisition values can be got by the first stage, following by accurately detecting the signal...
Calculation method of fracture toughness of materials at transition state
GAO Chao, HE Yuting, CUI Ronghong, WU Liming
2015, 41(4): 632-640. doi: 10.13700/j.bh.1001-5965.2014.0255
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The fracture toughness of materials is very important for damage tolerance design and assessment technology, while the test method to obtain the fracture toughness in the transition state is costly and time-consuming. In order to overcome these disadvantages, a determination method of fracture tough...
Online programming technique for flexible assembly of fuselage
WU Fengfeng, LI Dongsheng, WANG Liang
2015, 41(4): 641-648. doi: 10.13700/j.bh.1001-5965.2014.0256
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In order to meet the deep flexible demands of “one fixture with more models” and “one fixture with more states” for digital assembly of fuselage, enable the “bridge-frame” flexible tooling to have better capacity for independent adaptability, its kinematic model must be set up and its movement contr...
Depth information extraction of on-board monocular vision based on a single vertical target image
HUANG Xiaoyun, GAO Feng, XU Guoyan, DING Nenggen, XING Longlong
2015, 41(4): 649-655. doi: 10.13700/j.bh.1001-5965.2014.0272
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Calculating obstacle distance for on-board monocular vision system on intelligent vehicle was investigated when the obstacle has been detected. An extraction method of depth information only using a single target image without any internal camera parameters was developed. The mapping relation betwee...
Hydrodynamic features of underwater vehicles based on flow control
ZHANG Xiaoshi, WANG Cong, CAO Wei, ZHAO Chenggong
2015, 41(4): 656-662. doi: 10.13700/j.bh.1001-5965.2014.0299
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The hydrodynamic characteristics of underwater vehicles were numerical modelling studied by CFX. Shear stress transport turbulence model control equation of mixed media, Reynolds-averaged Navier-Stokes equation and mass transport equation between each phase were solved, and three dimensional numeric...
Tool path generation for Loop subdivision surface based finish machining
CHEN Tiantian, ZHAO Gang
2015, 41(4): 663-668. doi: 10.13700/j.bh.1001-5965.2014.0308
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Both smooth design model and discrete machining model can be represented by the subdivision surface, which avoids the complex progress of model transformation. Subdivision surface can be used to generate a smooth limit surface on an arbitrary topology mesh, and thus has great advantage in modeling c...
Edge-preserving filtering based on saliency map
FENG Ce, DAI Shuling, ZHAO Shuaihe
2015, 41(4): 669-674. doi: 10.13700/j.bh.1001-5965.2014.0309
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A new edge-preserving filtering algorithm based on the saliency map was proposed to avoid the halo effect along salient edges in traditional edge-preserving filtering. The saliency map was characterized by the salient edges in the image and insensibility to noise. The key idea of our filtering algor...
Prediction of forming limit diagram of AA7075-O aluminum alloy sheet based on modified M-K model
YANG Xiying, LANG Lihui, LIU Kangning, CAI Gaocan, GUO Chan
2015, 41(4): 675-679. doi: 10.13700/j.bh.1001-5965.2014.0310
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To accurately predict the forming limit diagram of AA7075-O aluminum alloy sheet, a modified M-K model was put forward based on the ductile fracture criterion and the traditional M-K model. By using the method which combined the uniaxial tension simulation with experiment, the history of stress-stra...
Energy-saving resource scheduling algorithm based on workload characteristic clustering
XIA Qingxin, LAN Yuqing, TANG Tian, XIAO Limin
2015, 41(4): 680-685. doi: 10.13700/j.bh.1001-5965.2014.0407
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When infrastructure as a service (IaaS) providers offer high performance services for users, they must think about how to reduce the energy cost of the cloud platform without violating the service level agreement (SLA). A resource scheduling algorithm to ensure SLA was proposed based on clustering a...
Tube free bulging experiment with force-end and material properties testing
CHENG Pengzhi, LANG Lihui, GE Yulong, RUAN Shangwen, WANG Tao, WU Hai
2015, 41(4): 686-692. doi: 10.13700/j.bh.1001-5965.2014.0603
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Compared with uniaxial tension, the material property parameters obtained by tube bulging test (TBT) can accurately reflect the plastic forming properties of materials under high-pressure fluid condition. Different end-conditions will seriously affect the experiment results of TBT. According to the ...
Experiment of chloride effect on strength of alkali-activated slag paste
CHENG Yin, HUANG Xin
2015, 41(4): 693-700. doi: 10.13700/j.bh.1001-5965.2015.0072
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Based on the results of unconfined compression tests of alkali-activated slag (KC) paste mixed with sodium chloride (NaCl) and calcium chloride (CaCl2), the influence law of the KC paste strength changing with chloride was studied. X-ray diffraction (XRD), thermal gravity-differential thermal gravit...
Generation of unsteady inflow conditions for compressible LES with a modified vortex method
XIE Baolin, SHAO Liang
2015, 41(4): 701-706. doi: 10.13700/j.bh.1001-5965.2014.0281
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This article is to explore and modify vortex method to generate large eddy simulation (LES) inlet condition. In the modification, a density distribution of vortex which can avoid unreasonable vortex quantity in local place was used. The movement of vortex was controlled by Langevin equation, which m...
Relationship between bias spring parameters and output performances of SMA actuators
YANG Baofeng, ZHANG Xiaoyong, YAN Xiaojun
2015, 41(4): 707-712. doi: 10.13700/j.bh.1001-5965.2014.0297
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The parameters of the bias spring have great impacts on the output performances of the shape memory alloy (SMA) actuator. To investigate the rules of influences, the output stroke and response rate of a SMA actuator with different bias spring stiffness and precompression load were studied. The outpu...
Object tracking in surveillance videos using spatial-temporal correlation graph model
ZHANG Cheng, MA Huadong, FU Huiyuan
2015, 41(4): 713-720. doi: 10.13700/j.bh.1001-5965.2014.0472
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Object tracking in non-overlapping multi-camera surveillance is a challenging problem since the transition time between cameras varies greatly from individual to individual with uncertainty. The key problem of object tracking in wide areas is data association and how to find correspondences between ...
Signature scheme for network coding against inter-generation pollution attacks
PENG Tianli, SHANG Tao, LIU Jianwei
2015, 41(4): 721-726. doi: 10.13700/j.bh.1001-5965.2014.0478
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The concept of generation is introduced into network coding so as to adapt to the needs of real-time application. Considering that network coding is vulnerable to inter-generation pollution attacks and causes message crosstalk, a generation-identifier based signature scheme for network coding was pr...
Explicit moment integration algorithm and its application
FU Zihao, GONG Guanghong
2015, 41(4): 727-731. doi: 10.13700/j.bh.1001-5965.2014.0266
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The calculation of moment is often used in finite element method, volume calculation, moment of inertia calculation, etc. A discrete method of the computational domain in three-dimensional space was proposed firstly based on the superposition of moment. An explicit formula was derived in three-dimen...
3D face recognition based on local radial binary pattern
LIU Qing, SUN Junhua
2015, 41(4): 732-736. doi: 10.13700/j.bh.1001-5965.2014.0289
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An operator named local radial binary pattern (LRBP) was proposed for extracting local features in face recognition. The binary sequence encoding scheme of the LRBP is different from that of the local binary pattern. Firstly, the proposed LRBP operator was used in 3D face recognition. 3D face depth ...
Dynamics modeling and motion programming for electromagnetic formation flight
SHAO Longfei, SHI Peng, ZHAO Yushan
2015, 41(4): 737-743. doi: 10.13700/j.bh.1001-5965.2014.0305
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Based on the mechanism of electromagnetic spacecraft, the relative translational “tethered” dynamics model for two-craft electromagnetic formation flight (EMFF) in low earth orbit was developed by using Lagrange theory. The linearized equations for motion and stability analysis of two-craft radial a...
Storage life evaluation method based on segmented nonlinear Arrhenius model
ZHOU Jie, YAO Jun, SONG Yan
2015, 41(4): 744-750. doi: 10.13700/j.bh.1001-5965.2014.0319
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Considering that logarithm linear Arrhenius model is only suitable for a small temperature range, a correction method for the Arrhenius model was given. As the step-down-stress accelerated life testing has the advantages of higher failure rate, less sample size, and simpler testing equipment, an eva...
Recognition of Chinese characters based on multi-scale gradient and deep neural network
PAN Weishen, JIN Lianwen, FENG Ziyong
2015, 41(4): 751-756. doi: 10.13700/j.bh.1001-5965.2014.0499
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The method to extract the gradient histogram feature of the Chinese characters with a multi-scale sliding window and to recognize the printed Chinese characters with deep neural network was presented. In order to acquire the spatial information of the gradient histogram, a retractable sliding window...

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