摘要：
The efficient tracking of visual objects in complex environments is a challenging task for the vision community. In a real-rime particle filter tracking, the particles are a constrained resource and should be well used. From the aspect of efficiently exploring the state space, a new particle filter method named detection based particle filter to the real time tracking of non-rigid objects are proposed. This method evenly spread particles in the possible state space at each time step, and keeps a minimum particle number in each possible target region. Color clues are used in this method. Experimental results show that this method can achieve good performance and need smaller particle number compared with sampling importance resampling (SIR) particle filter.
摘要：
In order to study the behavior of fatigue crack propagation under random overloads, a Monte Carlo simulation scheme is proposed. Overloads of Poisson flow with uniform distribution on base-line constant-amplitude cyclic loads are considered. The retardation effect of overload is taken into account using crack closure model and the crack opening stress level is assumed to vary linearly in the yield zone produced by the overload. The fatigue crack growth curve from initial crack size till fatigue failure is simulated step by step. Through the large number of the simulated samples, the average fatigue crack propagation life is calculated. Finally, the influence of overload intensity and magnitude on fatigue crack propagation life is studied.
期刊：
PROCEEDINGS OF THE 11TH INTERNATIONAL CONFERENCE ON INDUSTRIAL ENGINEERING AND ENGINEERING MANAGEMENT, VOLS 1 AND 2: INDUSTRIAL ENGINEERING AND ENGINEERING MANAGEMENT IN THE GLOBAL ECONOMY,2005年:621-625
摘要：
Stock market is complicated dynamic system affected by many factors. To model it, many methods have been proposed. But those methods cannot solve this problem very well. In this paper, from analyses the mathematic description of stock market system, a new method based on new evolutionary neural network is proposed here. In this new evolutionary neural network, the traditional BP algorithm and a new bionics algorithm, immunized evolutionary programming proposed by author 1 is combined. In order to verify this new method, the stock market data of Shanghai market in 1996 is used. The results show that, our new method is very good to real practice.
摘要：
Geodetic deformation severely affects the development of the oilfield and probably causes casing damage or abandonment of injection wells and producers. Therefore, it is meaningful to survey and study three-dimensional geodetic deformation in the process of the oilfield development. In order to study this issue, 11-year long term surveying of three-dimensional geodetic deformation has been carried out while developing Naner area in Daqing oilfield. Basic rules of 3-D geodetic deformation have been obtained through surveying. Results show that production and injection under high pressure may cause the changes of surface elevation, and geodetic deformation correlates with simultaneous formation pressure. Precautions and relative technological measurements have been put forward in the waterflood development in Naner region and provide theoretical guidelines for the production and casing preservation of the oilfield. Finally, surveying results are interpreted by porous elastic theory. Mathematical model to calculate 3-D geodetic deformation is put forward in the course of the oilfield development.
期刊：
Progress in Safety Science and Technology Volume 4:Proceedings of the 2004 International Symposium on Safety Science and Technology,2004年4(PART A):922-926
关键词：
ant colony algorithm;combination optimization;mine ventilation system
摘要：
The optimization of mine ventilation system is a very complicated combination optimization. Ant colony algorithm proposed recently is a very good method to solve complicated combination optimization problem. Considering the essence of optimization of mine ventilation system, the ant colony algorithm is introduced here to solve the problem of mine ventilation system optimization. The detailed process of ant colony algorithm to optimization of mine ventilation system is described in this paper. At last, a mining engineering example is used to verify the effect of this new method. The results show that, ant colony algorithm is a very good method to complicated combination optimization problem. It not only can solve optimization of ventilation system, but also can solve the similar problem of scheme optimization.
摘要：
A statistical model is proposed for the analysis of fatigue crack growth, based on the theory of fracture mechanics and stochastic process. The fatigue growth process is approximated as a diffusive Markov process. The associated backward Fokker-Plank equation and boundary conditions are written, and the distribution of crack growth time under a given crack size is obtained by using an Eigenfunction method. The sought distribution is expressed in the form of a convergent infinite series. Two examples are presented to illustrate the application of the method. The predicted results seem to agree with the experimental data.
摘要：
The objective function of the optimization parameter back analysis is a very complicated nonlinear multiple hump function. To solve this problem, the traditional optimization methods have some problems, such as the result relying on initial value, easy to fail, while the global optimization method-Evolutionary Algorithm can solve it very well. But the efficiency of the generally used Genetic Algorithm (GA) is very low. To overcome the GA's problem, a new bionics algorithm-Immune Evolutionary Programming (IEP) which combines Artificial Immune System (AIS) and Evolutionary Programming (EP) is proposed. At last, one numerical example and one a real. engineering example are used to verify calculating effect of the proposed algorithm. The results show that, to one problem, this algorithm can identify the suitable parameters of surrounding rock mass when only the displacements are known. And the calculating efficiency and effect are all good compared with other methods. Then this algorithm is more suitable for parameters identification problem and can be applied in real practice.
关键词：
fluid-solid interaction;linear elasticity;finite element method;porous flow
摘要：
Combining the theory of porous flow and elastic-plastic mechanics and considering the interaction of coal-bed methane and coal-mass, a mathematical model for the movement of coal-bed methane and the numerical method were established. Through dispersing the equation of coal-bed methane porous and coal distortion, we obtained a functional analysis equation, and educed the coupling solution by finite element method. Finally, a calculated example was presented in this paper.
期刊：
Progress in Safety Science and Technology Volume 4:Proceedings of the 2004 International Symposium on Safety Science and Technology,2004年4(PART A):519-522
关键词：
rockburst;magnitude;frequency;gray system method;extreme value theory
摘要：
Because of unclear occurrence mechanism and many influence factors of rockburst, forecasting of rockburst from mechanism is very difficult. Now some mines have erected seismic stations, which record the state of rockburst every hour. In this paper, large amount of recorded data in Huafeng and Da'anshan mine were analyzed with 3 methods in order to find some laws to forecast rockburst. The first method is Gutenburg-Richter relations. On the basis of the first method, combined with the extreme value theory of statistics, the second method was given. The third method is gray system method. By comparing the three methods, application conditions and according merits and drawbacks were presented respectively.
摘要：
From the generalized constitutive law of geo-material elastic-plastic model, the problem of model identification among one model type is transformed to a problem of parameter identification. So, using the new bionics algoritlun-Immune Evolutionary Programming (IEP) proposed by author recently, the elastic-plastic model identification among one model type is studied, and a new model identification method is proposed. At last, this method is verified by a numerical example. The results show that, this method can get the suitable geo-material model when only displacements are known.
摘要：
The coal mass deformation and fluid flow coal-bed methane and water two phases fluid flow in coal bed interact during coal-bed methane exploitation. Because of coal-bed methane adsorption and de-sorption, coal-bed methane flow is an an-isothermal procedure. In this paper, the coal skeleton is assumed to have elastic-plastic behavior, the deformation equations were derived and according to the elasto-plastic theory. Based on the Darcy's law, and considered the coal-bed methane adsorption and de-sorption effect the author erected mathematical models for coal-bed methane and water flow through coal reservoir were established. According to physical experiments, the author gave the coupling relations among stress, seepage and temperature fields. The numerical simulation method of three fields coupling models was finite element. The method of solving the coupled question is reiterative method. Finally, by the simulation, the author gave a practical example, and compared the difference between coupled model and rigid model.
