2009 Vol. 35, No. 10

Display Method:
Grade-life model based on wavelet package and BP network for rolling bearing
Miao Xuewen, Hong Jie, Ma Yanhong
2009, 35(10): 1161-1165.
Abstract:
Grade-life was used to describe rolling bearing-s service life, which means the entire service life is divided into four stages: good bearing condition, initial defect condition, damaged bearing condition and failure coming condition, and an assessment model was presented for bearing-s Grade-life. S...
Knock signal analysis for gasoline engines based on discrete wavelet transform
Wang Yanyan, Yang Jianguo, Song Baoyu
2009, 35(10): 1166-1169.
Abstract:
For the increasing of knock detection precision, the application of discrete wavelet transform(DWT) in the analysis of gasoline engine knock signal was studied. First, the knock feature was extracted from gasoline engine cylinder block acceleration signals by using DWT. Then, the parameter for evalu...
Truss topology optimization with uncertain loading scenarios
Li Dongze, Yu Dengyun, Ma Xingrui
2009, 35(10): 1170-1173.
Abstract:
A new model of truss topology optimization (TTO) considering uncertain (in size and direction) loading scenarios was presented. The uncertain loading was modeled as bounded convex sets, and the uncertain model was transformed to a deterministic model. The TTO was formulated as minimization of the co...
Computation of three-dimensional flow field in secondary gas injection for thrust vectoring nozzle
Liu Hui, Xing Yuming, Eriqitai
2009, 35(10): 1174-1178.
Abstract:
The complex inner flow-field of the thrust vectoring nozzle based on secondary gas injection was numerically simulated using three-dimensional average Reynolds equations and the κ-ε turbulent models. The influences on the thrust vectoring efficiency and the thrust ratio of different injection parame...
Co-state estimation algorithm of the surface-to-air missile optimal trajectory
Li Jiafeng, Chen Wanchun
2009, 35(10): 1179-1182.
Abstract:
As to obtain the precise optimal trajectory of the surface-to-air missile rapidly, a co-states estimation optimization algorithm was developed based on the Legendre pseudospectral method. The algorithm overcomes the shortcoming of the Legendre pseudospectral method such as there are too many optimiz...
Safety-concerned longitudinal control strategy for takeoff phase of UAV
Zhang Ligang, Wang Yong
2009, 35(10): 1183-1187.
Abstract:
In order to heighten the safety of unmanned aerial vehicle(UAV) taking off in atmospheric disturbance environment, a new safety-concerned longitudinal control strategy based on direct force control method was discussed as an improvement of the regular longitudinal control strategy for the takeoff ph...
Effects of channel orientation on fluid flow and heat transfer in a channel with angled ribs
Liu Chuankai, Ding Shuiting, Qiu Tian, Tao Zhi
2009, 35(10): 1188-1191.
Abstract:
Numerical simulations of turbulent flow and heat transfer in a rotating radial outward flow passage with 60° ribs were performed. Three channel orientations were studied, that is, 0°,-45° and +45°. Effects of Coriolis and rib induced secondary flows were analyzed with the three dimensional simulatio...
Adaptive model of rotor/turbo-shaft engine
Zou Xianquan, Sun Jianguo, Zhang Haibo
2009, 35(10): 1192-1196.
Abstract:
An adaptive model of rotor/turbo-shaft engine on board was constructed using Kalman filter. The state variable model of rotor/turbo-shaft engine was built through the data fitness method, and a Kalman filter was designed using the deterioration factors as augmented state variables. The Kalman filter...
Effect of embedding nickel foam on solid-liquid phase change
Xu Weiqiang, Yuan Xiugan, Xing Yuming
2009, 35(10): 1197-1200.
Abstract:
To improve the void distribution and thermal performance of phase change thermal storage devices, thermal storage containers embedded with nickel foam cores were designed and manufactured based on the theoretical research. Phase change experiments were carried out with those containers, as well as c...
BBN-based fault localization technique
Liu Yongpo, Jin Maozhong, Jia Xiaoxia, Liu Xuemei
2009, 35(10): 1201-1205.
Abstract:
Fault localization techniques help programmers find out the locations and the causes of the faults and accelerate the debugging process. The relation between the fault and the failure is usually complicated, making it hard to deduce how a fault causes the failure. At present, analysis of variance is...
Fatigue property and its probabilistic character of S06 steel
Hu Yanhui, Zhong Qunpeng, Zhang Zheng, Han Bangcheng
2009, 35(10): 1206-1209.
Abstract:
The fatigue property between 104~107 cycles of S06 steel, which is a new kind of precipitation-hardened stainless steel with high yield strength, was tested with PLG-100C high-cycle fatigue testing machine. With the decrease of stress amplitude, more fatigue crack initiated from subsurface. The fati...
Camera calibration with parallel lines
Ma Changzheng, Dong Mingli, Zhu Lianqing, Lü Naiguang
2009, 35(10): 1210-1213.
Abstract:
To solve precision problem of the camera lens distortion in vision measurement, a new method for nonlinear distortion correction and camera calibration was presented. Considering the fact that a camera followed the perspective camera model if and only if the projection of every 3D line in space onto...
Image mapping approach based on biharmonic spline interpolation concerning dot arrangement and multi-mapping
Lai Guojun, Shen Gongxin
2009, 35(10): 1214-1219.
Abstract:
To obtain connection between dot arrangement on mapping board and image mapping error of digital stereo particle image velocimetry (DSPIV), five mapping boards with rectangular dot pattern covering aera of same size were used respectively to perform image mapping. Dot spacing in these dot pattern wa...
Numerical simulation of shock impact on material interface
Zhang Bin, Liu Yu, Wang Ge
2009, 35(10): 1220-1223.
Abstract:
The key of numerical simulation of the problems of shock impact on interface is capturing accurately the material interfaces. The position of material interfaces were captured by level set, the parameter of ghost points were defined by modified ghost fluid method, accordingly the problem of multi-...
Parallel algorithm based on improved SSDA in TEM
Hu Kai, Zhang Xinyu, Yang Rui, Liu Deqing
2009, 35(10): 1224-1227.
Abstract:
A new terrain elevation matching (TEM) method using sequential similarity detection algorithm (SSDA), which is an image matching algorithm was presented, while regarding the digital elevation model, height value and real-time profile data in TEM as searching image, hue value and template in SSDA res...
Calculation method for airplane IR radiation and atmospheric transmittance
Mao Xia, Hu Haiyong, Huang Kang, Liang Xiaogeng
2009, 35(10): 1228-1231.
Abstract:
The infrared radiation of airplane targets and the radiation attenuation of the infrared radiation in the atmosphere were researched. Based on the existing theoretical study and the structure of the airplane, the infrared radiation sources of the airplane were divided into three categories: fuselage...
FCD based information processing model in parallel road network
Zhu Tongyu, Guo Shengmin, Lü Weifeng, Wang Jifang
2009, 35(10): 1232-1236.
Abstract:
Limited by the poor GPS locating precision, it is quite difficult to implement map matching and path deriving procedures in the parallel road network by FCD (floating car data) technology, which affects the traffic information accuracy directly. On the basis of existing FCD information processing fr...
Efficient architecture design for AVS de-blocking loop filter
Liu Rongke, Yu Peng
2009, 35(10): 1237-1240.
Abstract:
In order to meet the requirements in the real time decoding of high definition(HD) video, an efficient very large-scale integration(VLSI) architecture proper for de-blocking loop filter in audio video coding standard(AVS) was presented. The 8×8 blocks were divided into 4×4 blocks for filtering opera...
Optimization of machine layout based on genetic algorithm
Shen Jiangang, Wang Li, Qiu Peiqiang
2009, 35(10): 1241-1244.
Abstract:
To solve the machine layout problem, a multi-objective optimization model was constructed. And a combination mutation strategy, combined with the best individual mutation and the random mutation, was designed to remedy the defects of the present genetic algorithms for site layout problems. At the be...
Improved ant colony algorithm for shortest path problem in time-dependent networks
Liu Yongqiang, Chang Qing, Xiong Huagang
2009, 35(10): 1245-1248.
Abstract:
An improved pheromone update strategy suitable for time-dependent networks was proposed. Under this strategy, the residual pheromone of each road can accurately reflect the change of weighted value of each road. An improved selection strategy between adjacent cities was used to compute the cities- t...
Concurrency control of collaborative assembly system under web environment
Jing Shikai, Li Liansheng, Liu Jihong
2009, 35(10): 1249-1253.
Abstract:
Based on the analyses of collaborative assembly operations under the web environment, five types of concurrency assembly conflicts were summarized, which are the inconsistent results produced by multi-clients, multi-clients grasping the wrong parts simultaneously, multi-clients assembling the same p...
Approach to expert recommendation with multiple knowledge areas based on fuzzy text categorization
Li Ming, Liu Lu, Wang Jun, Huang Zhaodong
2009, 35(10): 1254-1257.
Abstract:
Recommending an appropriate expert in knowledge management systems is an effective and efficient way to utilize tacit knowledge. To recommend the experts with multiple knowledge areas and identify the user-s knowledge needs completely, an approach to expert recommendation with multiple knowledge are...
Dynamic quality planning in product development
Dai Wei, Tang Xiaoqing, Wang Meiqing
2009, 35(10): 1258-1262.
Abstract:
In order to facilitate product development under dynamic manufacturing environment, methodologies and technologies were developed to support dynamic quality planning. A dynamic quality planning model (DPQM) for dynamic product development was proposed based on quality activities. The attributes of q...
Optimization for CFRP pultrusion process based on genetic algorithm-neural network
Chen Xingkai, Xie Huaiqin
2009, 35(10): 1263-1267.
Abstract:
According to the curing kinetics and heat transfer theory, the models of unsteady temperature field and resin curing for the pultrusion process of carbon fiber reinforced polymer (CFRP) were established. The finite element/finite different method associated with the indirect decoupling method based ...
Integrated design of aerodynamic and stealthy performance for missiles with non-circular cross section
Chu Liang, Ma Dongli, Liu Zhongtie
2009, 35(10): 1268-1272.
Abstract:
According to the aerodynamic and stealthy performance requirements in non-circular cross section configuration design, and based on the concept of multi-objective optimization, the Pareto method and genetic algorithm were combined and tournament selective reproductive operator, Niche and Pareto filt...
Cournot oligopoly and its application: an extension to heterogeneous products with three participants
Wang Yuling, Chen Juan
2009, 35(10): 1273-1277.
Abstract:
The concept on benchmark benefit of process innovation and the method of analyzing on oligopoly competition model with heterogeneous products were applied to extend the original study of two participants to the case of three participants in Cournot oligopoly. The gaming process of innovation was res...
Game cross efficiency DEA based project review of equipment design
Wang Ke, Wei Fajie
2009, 35(10): 1278-1282.
Abstract:
The multiple attribute comprehensive evaluation models which could deal with three types of index(benefit, cost, fixed) were constructed based on data envelopment analysis(DEA). The cross efficiency concept was introduced to link the self-evaluation with peer-evaluation of decision making unit(DMU) ...
Extracting thematic communities from Wikipedia
Yu Yang, Lin Zhangxi, Xia Guoping
2009, 35(10): 1283-1286.
Abstract:
The current search module in Wikipedia has low search efficiency due to the search method, which is built on simple keywords matching. To improve the efficiency of knowledge retrieval from the Wikipedia spheres with more accurate links among them, the algorithm named term distance based on linkage (...