Advanced Search

2003 Vol. 29, No. 3

  Previous Issue | Next Issue 
Display Method:
Longitudinal Shear Stress around Collinear Periodical Rigid Line Inclusions Between Dissimilar Materials
Yang Xiaowei, Jiang Chiping
2003, 29(3): 189-192.
Abstract References Relative Articles Resource File Access Statistics iconViews $!{v.htmlCount} iconDownload 754
Abstract:
Longitudinal shear problems of collinear periodical rigid line inclusions at the interface of dissimilar materials were dealt with. By using complex variable method, a closed form solution was derived. On the above basis, stress singularity factor near the rigid line end was derived, stress interact...
Engineering Simulation Method for Airfield overComplex Terrain at Minimum Altitude
Liu Gang, Hong Guanxin, Jin Changjiang
2003, 29(3): 193-196.
Abstract References Relative Articles Resource File Access Statistics iconViews $!{v.htmlCount} iconDownload 1260
Abstract:
To describe the exterior environment where airplanes fly at low altitude, complex landform for minimum altitude flying was formed by planning multiple mountain ranges and many kinds of physiognomies. On the basis of potential flow theory, an engineering numerical simulation model was set up to simul...
Porting Linux Kernel to New Hardware Platform
Lin Shiding, Ren Aihua, Wang Lei, Zhou Bosheng
2003, 29(3): 197-201.
Abstract References Relative Articles Resource File Access Statistics iconViews $!{v.htmlCount} iconDownload 1989
Abstract:
As a new VLIW based microprocessor M3270 was manufactured successfully, an operating system was urgently needed to support it. To research the architecture of Linux kernel and analyze the amount of efforts required to port Linux kernel to a new hardware, it will improve OS designing technique and re...
Experimental Investigation on Aerodynamic Performanceof Serrated Gurney Flap
Shen Xialing, Wan Zhouying, Gao Ge
2003, 29(3): 202-204.
Abstract References Relative Articles Resource File Access Statistics iconViews $!{v.htmlCount} iconDownload 1068
Abstract:
Force and PIV local flow measurements were conducted in a low speed wind tunnel to study the effectiveness of serrated Gurney flap at different deflections. The results showed that the serrated Gurney flap could significantly increase the lift coefficients and the ratio of lift to drag of the airfoi...
Prediction of Turbulent Flow and Heat Transfer Within Rotating Smooth UShaped Passage
Deng Hongwu, Tao Zhi, Xu Guoqiang, Ding Shuiting
2003, 29(3): 205-209.
Abstract References Relative Articles Resource File Access Statistics iconViews $!{v.htmlCount} iconDownload 780
Abstract:
A two-equation turbulence model with additional term for Coriolis and buoyancy was used to predict turbulent flow and heat transfer in a rotating smooth serpentine passage. Using pressurized air as the coolant, operating conditions were selected to closely match the real turbine operating parameters...
GD1 Queuing Simulation with FGN Input
Shen Peng
2003, 29(3): 210-213.
Abstract References Relative Articles Resource File Access Statistics iconViews $!{v.htmlCount} iconDownload 1424
Abstract:
The traditional queuing theory is not applicable to the self-similar high-speed network traffic. A qualitative analysis of G/D/1 queue with FGN input by computer simulation was presented, and attention was focused on the average delay time and the tail behavior of infinite and finite queues. The eff...
Numerical Research on Unsteady Effect of ShockShock Interference Flow
Yan Chao, Tu Zhengguang, Yu Xiaohong, Zhang Zhi
2003, 29(3): 214-217.
Abstract References Relative Articles Resource File Access Statistics iconViews $!{v.htmlCount} iconDownload 1036
Abstract:
The ASUM+ scheme is applied to numerically simulate the shock-shock interference flow around a semiglobe under steady oncoming flow. The results show that the interference flow is inherently unsteady. The complicated flow structures of an unsteady supersonic jet behind the bow shock are analyzed and...
Fatigue Life Estimation of Specimen under Spectrum LoadUsing Fuzzy Miners Rule
Jia Xinglan, Liu Wenting
2003, 29(3): 218-220.
Abstract References Relative Articles Resource File Access Statistics iconViews $!{v.htmlCount} iconDownload 1330
Abstract:
Fatigue damage exhibits some "fuzzy" character when the fatigue stress in load spectrum is lower slightly than fatigue limit. A Miner-s rule considering this "fuzzy" damage character is established by means of membership function of fuzzy mathematics. When a specimen is subjected to programmed spect...
Optimization of MPLS Traffic Engineering Architecture
Huang He, Li Weiqin, Sun Guanying, Zhang Hui
2003, 29(3): 221-224.
Abstract References Relative Articles Resource File Access Statistics iconViews $!{v.htmlCount} iconDownload 1039
Abstract:
Several explicit routing algorithms for Internet traffic engineering were analyzed and compared, in order to put forward the architecture for distributed and on-line implements of MPLS Traffic Engineering. To improve the scalability of MPLS Traffic Engineering through optimizations of the performanc...
Effect of Atomic Oxygen on Leakage Rate of ORing
Shao Xinjie, Zhang Jianbin, Zhang Yuan
2003, 29(3): 225-228.
Abstract References Relative Articles Resource File Access Statistics iconViews $!{v.htmlCount} iconDownload 933
Abstract:
Experiments were conducted with an IFM ground equipment to investigate the effect of atomic oxygen on silicone rubber O-rings. By measuring the pressure between two O-rings, leakage rates between the two O-rings before and after exposure to atomic oxygen were compared. In addition, the surface chara...
Service Life Supervision for Aircraft Structures under
He Xiaofan, Liu Wenting, Jiang Dongbin
2003, 29(3): 229-232.
Abstract References Relative Articles Resource File Access Statistics iconViews $!{v.htmlCount} iconDownload 819
Abstract:
A method for supervising the service life of aircraft structures under corrosive environment was developed. Based on the evaluation results of fatigue life at room temperature and in the air and the expected calendar life index, considering the influence of pre-corrosion under ground environment and...
Bayes Analysis of Fatigue Strength Distribution Parameters
Chen Bo, Bao Rui, Zhang Jianyu, Fei Binjun
2003, 29(3): 233-236.
Abstract References Relative Articles Resource File Access Statistics iconViews $!{v.htmlCount} iconDownload 838
Abstract:
Based on Bayes estimation and Monte Carlo simulation method, a new method of getting distribution of fatigue strength parameters including average and dispersion is presented. With the scanty life date obtained by up and down experimental method, the interval estimation and confidence analysis of th...
Interchangeable Virtual Instrument Driver Based on COM
Zhang Fengjun, Meng Xiaofeng
2003, 29(3): 237-240.
Abstract References Relative Articles Resource File Access Statistics iconViews $!{v.htmlCount} iconDownload 717
Abstract:
A new structure of interchangeable virtual instrument driver was proposed based on COM, a commonly used software component. Analysis was done to explain how the new structured instrument driver implements interchangeability and simulation. At last, some comparisons of performance among VPP driver, I...
Structure and Hardness Changes of Laser Melted TiAl AlloySurface During Continuous Heating
Wu Guoqing, Huang Zheng, Lin Jianguo, Yang Jinhai
2003, 29(3): 241-243.
Abstract References Relative Articles Resource File Access Statistics iconViews $!{v.htmlCount} iconDownload 915
Abstract:
Structural transformation and hardness variation in the laser melted TiAl intermetallic alloy surface during continuous heating were studied systemically. The results indicated that, during continuous heating from 50 to 1000℃ with a heating rate of 10℃/min, α2→γ phase transformation in the laser mel...
Design of SmallSize and HighPressure Centrifugal Fans Used in Helicopters
Li Lin, Yu Jianzu, Xie Yongqi
2003, 29(3): 244-247.
Abstract References Relative Articles Resource File Access Statistics iconViews $!{v.htmlCount} iconDownload 1230
Abstract:
Based on the characters of high-pressure, high-speed and small-size of centrifugal fans used in helicopters, the basal structure parameters of the fans were analyzed and calculated. Efforts were made to analyze the flowing rules of the gas in the impeller. Influence of distribution of the gas vortex...
Modeling of Nonlinear System with Diagonal Recurrent Neural Network
Chen Ping, Qiu Lihua, Wang Zhanlin
2003, 29(3): 248-251.
Abstract References Relative Articles Resource File Access Statistics iconViews $!{v.htmlCount} iconDownload 742
Abstract:
Based on an analysis on the modeling principles of nonlinear system, the identification of a nonlinear system was realized with Diagonal Recurrent Neural Networks (DRNN). Serial-parallel identification architecture was applied in the modeling. Time variation was taken into account in the adjustment ...
Design of Loading Stand for Reverse Operation of Navigating Machine
Cao Tong, Sun Xingchu, Ouyang Qin, Zheng Shijing
2003, 29(3): 252-254.
Abstract References Relative Articles Resource File Access Statistics iconViews $!{v.htmlCount} iconDownload 874
Abstract:
Loading test stand for navigating machine is used to simulate dynamical loading from both normal and reverse directions on navigating faces, aimed at conducting performance test for navigating system and control system under reverse operating mode. It uses pneumatic power to realize reverse loading....
PartitionBlock Method of Feature Selection from Information System
Li Guohe, Zhao Qinping
2003, 29(3): 255-259.
Abstract References Relative Articles Resource File Access Statistics iconViews $!{v.htmlCount} iconDownload 660
Abstract:
After utilizing the technique of the combination of And/Or Tree with Different Matrix(DM) and Minimum Different List(MDL), this paper presents a method called IBFS to compute a better feature selection from larger Information System(IS).IBFS mainly partitions larger IS into small ones(called identif...
Precise Forming Simulation of Notched Panels with Double Curvature
Chen Lianfeng, Li Dongsheng, Zhou Xianbin, Chang Hesheng
2003, 29(3): 260-263.
Abstract References Relative Articles Resource File Access Statistics iconViews $!{v.htmlCount} iconDownload 813
Abstract:
This paper systemic investigates the fitability of the notched panel with double curvature by FEM method. The FEM simulation model was established for analysing the fitability of the notched panels on discrete nails die. Further more,the effect trend of the notch parameters,such as deep and width,on...
Data Fusion Algorithm for GPS/DR Integrated Vehicle Navigation System
Kou Yanhong, Zhang Qishan, Li Xianliang
2003, 29(3): 264-268.
Abstract References Relative Articles Resource File Access Statistics iconViews $!{v.htmlCount} iconDownload 1212
Abstract:
An adaptive federated Kalman filter model for GPS/DR integrated vehicle navigation system was established. Attention was focused on the filter algorithm. To improve the precision and reliability, data fusion techniques such as subsystem state evaluation, adaptive information distribution, error comp...
Modification of Transonic Wing Design Method
Sun Ruozi, Hua Jun
2003, 29(3): 269-272.
Abstract References Relative Articles Resource File Access Statistics iconViews $!{v.htmlCount} iconDownload 949
Abstract:
The residual-correction design method for transonic wings with prescribed pressure distribution developed by Takanashi was modified. In order to guarantee the convergence of the design in supersonic flow, Takanashi method could be modified by introducing some upwind based operator to the governing e...
Integrated Environment Based on HLA for Collaborative
Wang Jiangyun, Wang Xingren
2003, 29(3): 273-277.
Abstract References Relative Articles Resource File Access Statistics iconViews $!{v.htmlCount} iconDownload 1236
Abstract:
To deal with the simulation problems encountered in the system design for distributed simulations, an integrated environment based on HLA for collaborative simulation run-time management was provided, by integrating all the simulation tools and simulation applications that complied with the well-doc...
Trust Issues in PGP and Solutions
Liu Hailong, Zhang Qishan, Wu Jinpei
2003, 29(3): 278-282.
Abstract References Relative Articles Resource File Access Statistics iconViews $!{v.htmlCount} iconDownload 1468
Abstract:
As a powerful public key based encryption tool, PGP(Pretty Good Privacy) has been used widely, but wrongful trust assumptions often undermine its security. The PGP's trust model, web of trust, is discussed in detail. The trust architecture and reasoning are presented. Some suggestions are given to s...

Copyright © Journal of Beijing University of Aeronautics and Astronautics

Address: Editorial Department of Journal of Beijing University of Aeronautics and Astronautics, 37 Xueyuan Road, Haidian District, Beijing Post Code: 100191 Email: jbuaa@buaa.edu.cn

Supported by: Beijing Renhe Information Technology Co., Ltd.